![<?echo $_SERVER['SERVER_NAME'];?>](/template/twentyseventeen/skin/images/header.jpg)
I. Overview
With the accelerating urbanization process, the density of urban population has gradually escalated and traffic pressure has increased. As a large-capacity rapid transit vehicle in the city, the subway has shortened the distance between time and space, and has become an important means of transport to relieve traffic congestion in many large cities. According to relevant information, the total number of sunrise trips in the area within the Beijing Liuhuan Road reached more than 35 million, of which the subway has become the first choice for people because of its rapidity and its outstanding traffic jam. On the one hand, the characteristics of large-capacity traffic carrying and high mobility test the safety processing capability of the Beijing Subway. On the other hand, the expansion of the line, the increase of trains, and the shortening of the time between departures of trains have raised higher standards for subway operation management. Requirements, how to safeguard the safety of the subway has become a key issue that needs to be properly resolved. Out of consideration for safety, the implementation of the video surveillance system by subway security has been upgraded to a level not previously achieved, and the security video surveillance system has also become a top priority for subway construction.
Sony monitoring applied to Beijing subway security management
Second, the user application background
As a north-north rail transit rapid passenger transport line linking downtown Beijing and Changping New City, the opening of the Changping line not only provides more options for people to travel, but also eases the pressure of heavy traffic from north to south. The Changping Line of Beijing Subway runs from the Ming Tombs area to the south, and to the Xi Erqi Station on the 13th line of the Urban Railroad. It has a total length of 31.24 kilometers. It passes through 6 towns (streets) including Huilongguan, Shahe, Nanshao, Chengbei, Chengnan and Shisanling. It runs through and radiates innovation bases, life science parks, science and technology parks, Shahe Higher Education Park, Shahe Gonghua City, Changping Old City, and New City East District. Ming Tombs and other key functional areas. In the future, the second phase of the route will be extended from Xi'erqi southward to Jishuitan, and the number of stations will increase from four originally designed to six.
Changping line across the suburbs and urban areas, there are stops on the ground floor, the operating environment is very complex, there is a higher security requirements. At the same time, as a newly opened route, Changping Line puts forward new monitoring requirements for video surveillance systems. Different from previous line monitoring requirements, Changping Line's entire security system incorporates 12 systems including video surveillance, alarm, access control, and communications. How to achieve compatibility with numerous systems and branded products, as well as other lines, is highly desirable. Beijing subway security department concerned. In view of Sony’s strong brand strength, high-end stable product performance, open and converged compatibility, and comprehensive high-quality service support, Sony’s HD solution has emerged from numerous brand competitions and successfully served on the Beijing Metro Changping Line.
Third, Sony's response
For the full range of high-definition surveillance needs of Changping line, Sony uses a combination of analog video camera + codec. In this project, the various monitoring points of the subway mainly use the Sony wide dynamic color black camera SSC-DC598P wide dynamic, Sony's new generation of rugged dome camera SSC-CD77P, Sony smart network video server SNT-EX104 and Sobe decoder, It provides high-definition images for the monitoring center, and easily displays the details of the images, which satisfies the monitoring requirements of Changping Line's full coverage without dead ends.
(I) Video Surveillance System
1, entrance
The monitoring environment of subway entrances and exits is relatively complex. External light is bright during the day and the subway is relatively dark. At night, the external environment is dark and the lights in the subway are in good condition. The brightness and darkness contrast of the monitoring scene is so strong that the resulting image is often white or only black, and the human facial features cannot be discerned. In order to ensure the sharpness of the image, Sony uses color cameras SSC-DC573P, SSC-DC578P and SSC-DC593P, SSC-DC598P with excellent wide dynamics, built-in 1/3-inch high-sensitivity CCD, with Sony's advanced DynaView technology, The camera provides a very wide dynamic range, and even in environments where the light contrast is large, the image effects of the bright and dark areas can be taken into account at the same time. The camera also offers high resolution and a variety of convenient features including variable gamma curves, privacy zone and masking, motion detection, and CCD aperture control to make user monitoring easier. Among them SSC-DC593P and DC598P also have an automatic "day / night conversion" function, the camera can automatically switch color or black and white mode according to light changes, when the surrounding environment is dimmed, the infrared filter is automatically replaced with a transparent filter, the camera Switch to black and white mode to ensure picture quality. The Day/Night conversion function enables the camera to capture high-quality color images during the day and record clear black and white images at night. The stable product performance has effectively improved the shooting effect of the images.
2. Escalators/Stairs
In recent years, subway escalators/staircases have caused frequent trampling accidents due to breakdowns, congestion, etc., making subway security systems more important for video surveillance of escalators/stairs, and cameras with intelligent analysis and wide dynamic capabilities are more suitable for applications. Escalators/Stairs. The Sony SSC-G913, G918 and SSC-DC573P, DC578 wide dynamic cameras perform well and become the "masters" of capturing high-definition image details. If the SSC-G913, G918 horizontal resolution reaches 540TVL, the monitor screen is completely visible, so that each important detail can be completely recorded. It is worth mentioning that Sony's unique face detection function can intelligently recognize the face in the picture. Once a sudden situation occurs, it can quickly lock the monitoring target, generate an alarm signal in time and send it together with the image. To the management platform, a corresponding linkage alarm is made by the management platform to facilitate management personnel to take timely measures. On the other hand, the SSC-DC573P and DC578P cameras with wide dynamic capabilities use the advanced DynaView wide dynamic technology, which comprehensively uses the visibility enhancement technology to increase brightness in the dark areas of the screen while reducing brightness in the bright areas. The effective integration of bright and dark areas results in a high-definition monitoring picture.
3, underground passage
The environment is dark here and the monitoring range is relatively wide. Take Nanshao Station as an example. Compared with other stations, the underground passage of Nanshao Station is relatively long. In addition, the starting time of winter is early, and the light of the underground passage is not conducive to camera monitoring. How to ensure that the camera records clear images in a low-light environment, and how to achieve a wide range of monitoring without blind spots, these have become issues that must be considered when selecting cameras, relying on stable product performance and high-end technology applications, Sony SSC-CD77P The SSC-CD45P next-generation high-performance dome camera satisfies the monitoring requirements of the underground passage at Nanshao subway station. For low light environments, the SSC-CD77P uses a 1/3-inch ultra-high-sensitivity Sony SuperExwave CCD with outstanding low-light performance to ensure excellent image quality in a dark environment, with bright, low-noise images and without smearing by mobile workers. With day and night conversion function, suitable for all-weather applications. Not only that, the all-round SSC-CD77P camera sets day and night conversion and a rugged case that can adapt to a variety of demanding and harsh environments.
In order to solve the wide coverage requirements, the Sony SSC-CD45P next-generation high-performance dome camera uses a 1/3-inch high-sensitivity CCD and a 2.8- to 10-mm 3.6-times zoom auto iris lens to provide super security for metro surveillance systems. Imaginary clarity, exquisite, realistic images. In order to simplify the installation, these cameras use Sony's unique spherical universal joint type lens mount device, which makes the camera's viewing angle adjustment very simple and fast during installation. According to the operation and maintenance department, the long-term operation of the system is reflected in stability, reducing the post-sales maintenance links and costs.
4, manual / automatic ticket office
It is necessary for the video surveillance of the subway manual/automatic ticket office. Take the manual ticket office as an example. On the one hand, it can supervise the working status of the staff and obtain the appearance features of the passengers. On the other hand, the camera needs to see the entire ticket processing process. , Including the exchange of staff and customers, banknotes and par value. How to obtain high-definition and smooth monitoring images is the focus of monitoring in this region. In addition, there are special monitoring features in the area. Under the illumination of the lights, the reflection or backlight of the glass will have a certain impact on the monitoring effect. In response to this application feature, Sony deployed the SSC-G913 and G918 wide dynamic HD cameras. The industry-leading DynaviewEX wide dynamic technology can increase the dynamic range of the camera by 128 times compared to conventional cameras, and has excellent backlight compensation performance. Reflective and backlit get very good monitoring effect.
5, security check and ticket gate
Security check and ticket inspection are important links for passengers to take the subway, and they are also one of the key surveillance areas for cameras. For the metro surveillance in this area, Sony SSC-G913, G918, SSC-DC573, DC578P, and SSC-DC493P, DC498P high-definition gun cameras were also used. Among them, SSC-G913 and G918 have 540-line horizontal resolution, which is much higher than that of the same brand in the industry and can perfectly show the details of the image. At the same time, in view of the different needs of different sites, such as Xi'erqi Station and Zhuxinzhuang Station are security checkpoints after entering the subway, it is imperative to adopt ultra-wide dynamic surveillance cameras. Most of the Sony HD cameras used in security inspection and check gates have excellent ultra-wide dynamic capabilities, which can significantly improve the camera's sensitivity and contrast, even in the case of strong contrast between the light and dark can still get high-definition images.
6, station hall
As a place where people gather widely, the station hall is also an important deployment point for video surveillance systems. Due to the wide range of halls and the large flow of people, cameras need to provide comprehensive monitoring of passenger flow over a large area, clearly capture the details of the faces of people, and provide early warning of emergencies. Such as the Changping Line Xi'erqi and Nanshao such a large station, the relatively high density of people, the situation is complex, the camera requires a higher monitoring range. In addition, the relevant person in charge of the Changping line security system introduced the Changping line as a newly opened line connecting the urban areas. The peak of pedestrian flow is often concentrated in the commuting hours, while the passenger flow is relatively small in the evening. In this case, in order to save costs, part of the lights will be turned off when there are fewer passengers at night, and how the camera's low-light performance determines the quality of the images. Based on the above two considerations, Sony's new SSC-SD36P optical zoom zoom can achieve 36 times, the monitoring range is even greater, even if the object details can be clearly captured at a distance, it is suitable for long-distance large scenes monitor. Sony SSC-SD36P full range of coverage so that the subway monitoring no dead ends, all the scenery a panoramic view. For low-light monitoring, the SSC-SD36P is equipped with Sony's high-sensitivity Exwave HADCCD, and a day/night conversion function with an optical filter, with a minimum illumination of 0.2 lux, ensuring that bright monitoring objects can still be seen in a dark environment. At the same time, the clarity of this camera is 540TVL, which can easily meet the application requirements of the subway. With the back-end display and video equipment, very clear image details can be obtained.
7, platform
Subway platforms are the most important part of the entire video surveillance system. As we all know, platforms are densely populated, with large personnel flow and high mobility, especially when trains stop at stations. They are prone to crowded push-pulls. When the doors are about to open or close, some passengers will take the opportunity to get on and off the train. It poses a threat to the safety of passengers and it is also very detrimental to the monitoring of the train by the conductor. The camera needs to monitor the front of the vehicle and the door in real time to capture high-definition images to cope with emergencies and ensure traffic safety. With the exception of Nanshao Station, which is closed underground, all other stations are semi-enclosed, and the external light has a greater impact on the camera. In general, external light is strong and the platform environment is relatively dark. Cameras deployed on the platform need to deal with backlight/backlight problems. When the camera is facing away from the external environment, even if the station has light source assistance, due to strong external light, the screen shot is often dark. When the camera is facing the external environment, the monitor screen will appear white and the image will be unclear. Taking into account the specific application environment of the Changping line, Sontel deployed high-sensitivity SSC-G913, G918 day and night wide dynamic cameras. This camera uses Sony SuperHADCCDII, with infrared filters and the latest development of the DSP platform, can provide 540 lines of high-definition picture, day and night. The SSC-G913 and G918 adopt Sony's newly developed wide dynamic technology DynaviewEX. The dynamic range is 75dB in the industry, and it can easily cope with the impact of the external environment on the camera. At the same time, the camera has a backlight compensation function that can have a large contrast between light and shade. Automatic adjustments are made to optimize the overall image. Clear images are important for mastering the overall condition of the car body and ensuring the safety of door opening and closing.
8, elevator
In order to facilitate the transfer of passengers and disperse pedestrian flow, the newly opened Changping line built elevators to serve passengers. The video surveillance camera plays a role in the security protection of the elevator and the HD image capture is very important. The Sony SSC-G913 and G918 high-definition cameras installed in front of the elevator door provide clear and smooth images to the surveillance center with 540 lines of horizontal resolution and a minimum illumination of 0.06 Lux, demonstrating excellence in image detail recording.
(B) Video codec
Through the above-mentioned perfect integration of video surveillance products, the diverse needs of the metro environment for monitoring have been effectively solved. In order to achieve efficient video transmission and management, Changping line also uses the Sony SNT-EX104 intelligent network video server and Sobe decoder, which takes up less space in the occupied bandwidth and solves the problem of data transmission speed and efficiency. Sony SNT-EX1044 desktop network video server adopts Sony's latest image enhancement technology and DEPA second-generation intelligent monitoring technology to support H. 264/JPEG/MPEG-4 arbitrary dual-stream D1 resolution real-time output of 25 frames. Powerful features and outstanding performance are the perfect choice for users to convert from existing analog video to IP network systems. Not only that, the Sony Encoder's image enhancement and noise reduction technology (VE&XDNR) has significantly improved the image quality of analog cameras and caters to the user's pursuit of high-definition images. In addition, in the construction of the video surveillance platform of the Changping line of the subway, Sony's products have been perfectly compatible with Sony's partner Sobel's decoders, maximizing the application value of the video surveillance system.
Fourth, Sony's compatibility advantages
For a long time, the lack of security industry standards, the interface standards selected by each brand are also different, so it is difficult to be compatible between different brands, Sony brand products through the free development of different interfaces, can achieve access to many manufacturers management platform and control. The openness and compatibility of the system are good, and the flexibility is high. It supports various options for users. Even more noteworthy is that Sony's unique Sony SSV Partner Program (SecuritySolutionAffiliateProgram) promotes business and technical cooperation between Sony and its partners including software and hardware in an open manner, and establishes long-term technical cooperation. Partnership, mutual benefit and common development.
In addition, Sony video surveillance system supports multi-system linkage and expansion. On the one hand, through the camera's own I / O interface, to achieve the alarm signal input and output, so as to achieve physical linkage with other weak electrical equipment. On the other hand, through the free SDK or CGI development interface provided by Sony, the Sony camera and other system software platform access functions are completed. As one of the initiators of the ONVIF standard specification, Sony always upholds the concept of openness and integration, and takes practical actions to contribute to the standardization of the security industry.
Fifth, user feedback
After the system has been running for a period of time, the operation and maintenance department has feedback that the Sony HD solution is stable, with a low failure rate and easy installation and maintenance. At the same time, Sony's outstanding product performance and high-quality image quality have been highly valued by users, providing security for the safety and high-efficiency operation of the subway Changping line, solving the difficult problems in the traditional monitoring, and achieving high-definition video surveillance. It plays an important role. “Sony’s open products and platform system provide possibilities for future multi-system compatibility and access, and it is more conducive to the development of Phase 2 of Changping Line. It has laid a good foundation for us to lay the second phase of the project’s security system. The work is simpler and more convenient, said the person in charge of the Changping line security department.
Sixth, application development
The Beijing subway bears the burden of guaranteeing the transportation in Beijing and even the surrounding districts and counties, greatly alleviating the pressure on public transport. As of 2010, the total mileage of Beijing's rail transit has reached 300 kilometers, and will reach 420 kilometers in 2012, compared with 561 kilometers in 2015. The security system has become an essential supporting project for modern subway construction. In order to ensure the safety of the subway, choosing a high-quality security system is the most important aspect of the current security system construction. From 2006 onwards, Sony began to serve the construction of monitoring projects for the Beijing Subway. Successful applications of Sony, such as the high-performance SSC-, have been implemented in Metro Line 1, Line 2, Line 4, Line 5, and Line 10. The DC573P and DC578P ultra-wide dynamic color cameras are widely deployed in the above circuits and play an active role in high-definition monitoring.
In recent years, Sony has also realized large-scale applications in new lines, such as Changping Line, Yizhuang Line, and Fangshan Line. This benefited from Sony's high quality camera's good reputation in Beijing subway applications. Sony, which has won the leading technology and stability, has also provided users with professional and perfect services while ensuring product quality, and has become a Beijing Subway security guard. One of the preferred brands for monitoring. In addition to the wide application of video surveillance cameras, Sony decoders and Sobe platform are also operating well in these newly opened projects. In the Yizhuang subway line, the Sony SSC-G918 featured wide dynamic technology, low illumination, and day/night conversion. The Sony SSC-G918 performed well at security screenings, gates, platforms, and escalators. It greatly satisfies the user's HD details. Image requirements. At the same time, with the application of Sony SNT-EX104 intelligent network video server and Sobe decoder and platform, the entire monitoring system is even more powerful, contributing to the construction of an efficient management platform, providing users with a high-definition monitoring experience. In addition, in addition to the Beijing Subway, Sony surveillance camera products have been successfully applied or are being applied to subway monitoring systems in cities such as Tianjin, Shenyang, Shanghai and Xi’an.
Conclusion
According to statistics, during the “Twelfth Five-Year Plan†period, the investment in the construction of metro rail transit will exceed 700 billion yuan. Up to now, China has approved a total of 27 cities for rail transit construction planning. By 2015, the total length of rail transit lines in China will reach 2,400 kilometers. Along with the "upsurge" of metro rail transit projects in major cities, China has become the world's largest urban metro rail transit construction market. More and more safety issues have caused the community to attach great importance to it, and the subway security system should also cater to the general trend of the security market. Intelligent, high-definition, digitalization, extensive use of new products and new technologies, and the direction of command and dispatch visualization system integration are unquestionable. No end to safety construction! Sony is willing to explore with the industry colleagues to make a contribution to the safety of rail transit in China.
With the accelerating urbanization process, the density of urban population has gradually escalated and traffic pressure has increased. As a large-capacity rapid transit vehicle in the city, the subway has shortened the distance between time and space, and has become an important means of transport to relieve traffic congestion in many large cities. According to relevant information, the total number of sunrise trips in the area within the Beijing Liuhuan Road reached more than 35 million, of which the subway has become the first choice for people because of its rapidity and its outstanding traffic jam. On the one hand, the characteristics of large-capacity traffic carrying and high mobility test the safety processing capability of the Beijing Subway. On the other hand, the expansion of the line, the increase of trains, and the shortening of the time between departures of trains have raised higher standards for subway operation management. Requirements, how to safeguard the safety of the subway has become a key issue that needs to be properly resolved. Out of consideration for safety, the implementation of the video surveillance system by subway security has been upgraded to a level not previously achieved, and the security video surveillance system has also become a top priority for subway construction.
Sony monitoring applied to Beijing subway security management
Second, the user application background
As a north-north rail transit rapid passenger transport line linking downtown Beijing and Changping New City, the opening of the Changping line not only provides more options for people to travel, but also eases the pressure of heavy traffic from north to south. The Changping Line of Beijing Subway runs from the Ming Tombs area to the south, and to the Xi Erqi Station on the 13th line of the Urban Railroad. It has a total length of 31.24 kilometers. It passes through 6 towns (streets) including Huilongguan, Shahe, Nanshao, Chengbei, Chengnan and Shisanling. It runs through and radiates innovation bases, life science parks, science and technology parks, Shahe Higher Education Park, Shahe Gonghua City, Changping Old City, and New City East District. Ming Tombs and other key functional areas. In the future, the second phase of the route will be extended from Xi'erqi southward to Jishuitan, and the number of stations will increase from four originally designed to six.
Changping line across the suburbs and urban areas, there are stops on the ground floor, the operating environment is very complex, there is a higher security requirements. At the same time, as a newly opened route, Changping Line puts forward new monitoring requirements for video surveillance systems. Different from previous line monitoring requirements, Changping Line's entire security system incorporates 12 systems including video surveillance, alarm, access control, and communications. How to achieve compatibility with numerous systems and branded products, as well as other lines, is highly desirable. Beijing subway security department concerned. In view of Sony’s strong brand strength, high-end stable product performance, open and converged compatibility, and comprehensive high-quality service support, Sony’s HD solution has emerged from numerous brand competitions and successfully served on the Beijing Metro Changping Line.
Third, Sony's response
For the full range of high-definition surveillance needs of Changping line, Sony uses a combination of analog video camera + codec. In this project, the various monitoring points of the subway mainly use the Sony wide dynamic color black camera SSC-DC598P wide dynamic, Sony's new generation of rugged dome camera SSC-CD77P, Sony smart network video server SNT-EX104 and Sobe decoder, It provides high-definition images for the monitoring center, and easily displays the details of the images, which satisfies the monitoring requirements of Changping Line's full coverage without dead ends.
(I) Video Surveillance System
1, entrance
The monitoring environment of subway entrances and exits is relatively complex. External light is bright during the day and the subway is relatively dark. At night, the external environment is dark and the lights in the subway are in good condition. The brightness and darkness contrast of the monitoring scene is so strong that the resulting image is often white or only black, and the human facial features cannot be discerned. In order to ensure the sharpness of the image, Sony uses color cameras SSC-DC573P, SSC-DC578P and SSC-DC593P, SSC-DC598P with excellent wide dynamics, built-in 1/3-inch high-sensitivity CCD, with Sony's advanced DynaView technology, The camera provides a very wide dynamic range, and even in environments where the light contrast is large, the image effects of the bright and dark areas can be taken into account at the same time. The camera also offers high resolution and a variety of convenient features including variable gamma curves, privacy zone and masking, motion detection, and CCD aperture control to make user monitoring easier. Among them SSC-DC593P and DC598P also have an automatic "day / night conversion" function, the camera can automatically switch color or black and white mode according to light changes, when the surrounding environment is dimmed, the infrared filter is automatically replaced with a transparent filter, the camera Switch to black and white mode to ensure picture quality. The Day/Night conversion function enables the camera to capture high-quality color images during the day and record clear black and white images at night. The stable product performance has effectively improved the shooting effect of the images.
2. Escalators/Stairs
In recent years, subway escalators/staircases have caused frequent trampling accidents due to breakdowns, congestion, etc., making subway security systems more important for video surveillance of escalators/stairs, and cameras with intelligent analysis and wide dynamic capabilities are more suitable for applications. Escalators/Stairs. The Sony SSC-G913, G918 and SSC-DC573P, DC578 wide dynamic cameras perform well and become the "masters" of capturing high-definition image details. If the SSC-G913, G918 horizontal resolution reaches 540TVL, the monitor screen is completely visible, so that each important detail can be completely recorded. It is worth mentioning that Sony's unique face detection function can intelligently recognize the face in the picture. Once a sudden situation occurs, it can quickly lock the monitoring target, generate an alarm signal in time and send it together with the image. To the management platform, a corresponding linkage alarm is made by the management platform to facilitate management personnel to take timely measures. On the other hand, the SSC-DC573P and DC578P cameras with wide dynamic capabilities use the advanced DynaView wide dynamic technology, which comprehensively uses the visibility enhancement technology to increase brightness in the dark areas of the screen while reducing brightness in the bright areas. The effective integration of bright and dark areas results in a high-definition monitoring picture.
3, underground passage
The environment is dark here and the monitoring range is relatively wide. Take Nanshao Station as an example. Compared with other stations, the underground passage of Nanshao Station is relatively long. In addition, the starting time of winter is early, and the light of the underground passage is not conducive to camera monitoring. How to ensure that the camera records clear images in a low-light environment, and how to achieve a wide range of monitoring without blind spots, these have become issues that must be considered when selecting cameras, relying on stable product performance and high-end technology applications, Sony SSC-CD77P The SSC-CD45P next-generation high-performance dome camera satisfies the monitoring requirements of the underground passage at Nanshao subway station. For low light environments, the SSC-CD77P uses a 1/3-inch ultra-high-sensitivity Sony SuperExwave CCD with outstanding low-light performance to ensure excellent image quality in a dark environment, with bright, low-noise images and without smearing by mobile workers. With day and night conversion function, suitable for all-weather applications. Not only that, the all-round SSC-CD77P camera sets day and night conversion and a rugged case that can adapt to a variety of demanding and harsh environments.
In order to solve the wide coverage requirements, the Sony SSC-CD45P next-generation high-performance dome camera uses a 1/3-inch high-sensitivity CCD and a 2.8- to 10-mm 3.6-times zoom auto iris lens to provide super security for metro surveillance systems. Imaginary clarity, exquisite, realistic images. In order to simplify the installation, these cameras use Sony's unique spherical universal joint type lens mount device, which makes the camera's viewing angle adjustment very simple and fast during installation. According to the operation and maintenance department, the long-term operation of the system is reflected in stability, reducing the post-sales maintenance links and costs.
4, manual / automatic ticket office
It is necessary for the video surveillance of the subway manual/automatic ticket office. Take the manual ticket office as an example. On the one hand, it can supervise the working status of the staff and obtain the appearance features of the passengers. On the other hand, the camera needs to see the entire ticket processing process. , Including the exchange of staff and customers, banknotes and par value. How to obtain high-definition and smooth monitoring images is the focus of monitoring in this region. In addition, there are special monitoring features in the area. Under the illumination of the lights, the reflection or backlight of the glass will have a certain impact on the monitoring effect. In response to this application feature, Sony deployed the SSC-G913 and G918 wide dynamic HD cameras. The industry-leading DynaviewEX wide dynamic technology can increase the dynamic range of the camera by 128 times compared to conventional cameras, and has excellent backlight compensation performance. Reflective and backlit get very good monitoring effect.
5, security check and ticket gate
Security check and ticket inspection are important links for passengers to take the subway, and they are also one of the key surveillance areas for cameras. For the metro surveillance in this area, Sony SSC-G913, G918, SSC-DC573, DC578P, and SSC-DC493P, DC498P high-definition gun cameras were also used. Among them, SSC-G913 and G918 have 540-line horizontal resolution, which is much higher than that of the same brand in the industry and can perfectly show the details of the image. At the same time, in view of the different needs of different sites, such as Xi'erqi Station and Zhuxinzhuang Station are security checkpoints after entering the subway, it is imperative to adopt ultra-wide dynamic surveillance cameras. Most of the Sony HD cameras used in security inspection and check gates have excellent ultra-wide dynamic capabilities, which can significantly improve the camera's sensitivity and contrast, even in the case of strong contrast between the light and dark can still get high-definition images.
6, station hall
As a place where people gather widely, the station hall is also an important deployment point for video surveillance systems. Due to the wide range of halls and the large flow of people, cameras need to provide comprehensive monitoring of passenger flow over a large area, clearly capture the details of the faces of people, and provide early warning of emergencies. Such as the Changping Line Xi'erqi and Nanshao such a large station, the relatively high density of people, the situation is complex, the camera requires a higher monitoring range. In addition, the relevant person in charge of the Changping line security system introduced the Changping line as a newly opened line connecting the urban areas. The peak of pedestrian flow is often concentrated in the commuting hours, while the passenger flow is relatively small in the evening. In this case, in order to save costs, part of the lights will be turned off when there are fewer passengers at night, and how the camera's low-light performance determines the quality of the images. Based on the above two considerations, Sony's new SSC-SD36P optical zoom zoom can achieve 36 times, the monitoring range is even greater, even if the object details can be clearly captured at a distance, it is suitable for long-distance large scenes monitor. Sony SSC-SD36P full range of coverage so that the subway monitoring no dead ends, all the scenery a panoramic view. For low-light monitoring, the SSC-SD36P is equipped with Sony's high-sensitivity Exwave HADCCD, and a day/night conversion function with an optical filter, with a minimum illumination of 0.2 lux, ensuring that bright monitoring objects can still be seen in a dark environment. At the same time, the clarity of this camera is 540TVL, which can easily meet the application requirements of the subway. With the back-end display and video equipment, very clear image details can be obtained.
7, platform
Subway platforms are the most important part of the entire video surveillance system. As we all know, platforms are densely populated, with large personnel flow and high mobility, especially when trains stop at stations. They are prone to crowded push-pulls. When the doors are about to open or close, some passengers will take the opportunity to get on and off the train. It poses a threat to the safety of passengers and it is also very detrimental to the monitoring of the train by the conductor. The camera needs to monitor the front of the vehicle and the door in real time to capture high-definition images to cope with emergencies and ensure traffic safety. With the exception of Nanshao Station, which is closed underground, all other stations are semi-enclosed, and the external light has a greater impact on the camera. In general, external light is strong and the platform environment is relatively dark. Cameras deployed on the platform need to deal with backlight/backlight problems. When the camera is facing away from the external environment, even if the station has light source assistance, due to strong external light, the screen shot is often dark. When the camera is facing the external environment, the monitor screen will appear white and the image will be unclear. Taking into account the specific application environment of the Changping line, Sontel deployed high-sensitivity SSC-G913, G918 day and night wide dynamic cameras. This camera uses Sony SuperHADCCDII, with infrared filters and the latest development of the DSP platform, can provide 540 lines of high-definition picture, day and night. The SSC-G913 and G918 adopt Sony's newly developed wide dynamic technology DynaviewEX. The dynamic range is 75dB in the industry, and it can easily cope with the impact of the external environment on the camera. At the same time, the camera has a backlight compensation function that can have a large contrast between light and shade. Automatic adjustments are made to optimize the overall image. Clear images are important for mastering the overall condition of the car body and ensuring the safety of door opening and closing.
8, elevator
In order to facilitate the transfer of passengers and disperse pedestrian flow, the newly opened Changping line built elevators to serve passengers. The video surveillance camera plays a role in the security protection of the elevator and the HD image capture is very important. The Sony SSC-G913 and G918 high-definition cameras installed in front of the elevator door provide clear and smooth images to the surveillance center with 540 lines of horizontal resolution and a minimum illumination of 0.06 Lux, demonstrating excellence in image detail recording.
(B) Video codec
Through the above-mentioned perfect integration of video surveillance products, the diverse needs of the metro environment for monitoring have been effectively solved. In order to achieve efficient video transmission and management, Changping line also uses the Sony SNT-EX104 intelligent network video server and Sobe decoder, which takes up less space in the occupied bandwidth and solves the problem of data transmission speed and efficiency. Sony SNT-EX1044 desktop network video server adopts Sony's latest image enhancement technology and DEPA second-generation intelligent monitoring technology to support H. 264/JPEG/MPEG-4 arbitrary dual-stream D1 resolution real-time output of 25 frames. Powerful features and outstanding performance are the perfect choice for users to convert from existing analog video to IP network systems. Not only that, the Sony Encoder's image enhancement and noise reduction technology (VE&XDNR) has significantly improved the image quality of analog cameras and caters to the user's pursuit of high-definition images. In addition, in the construction of the video surveillance platform of the Changping line of the subway, Sony's products have been perfectly compatible with Sony's partner Sobel's decoders, maximizing the application value of the video surveillance system.
Fourth, Sony's compatibility advantages
For a long time, the lack of security industry standards, the interface standards selected by each brand are also different, so it is difficult to be compatible between different brands, Sony brand products through the free development of different interfaces, can achieve access to many manufacturers management platform and control. The openness and compatibility of the system are good, and the flexibility is high. It supports various options for users. Even more noteworthy is that Sony's unique Sony SSV Partner Program (SecuritySolutionAffiliateProgram) promotes business and technical cooperation between Sony and its partners including software and hardware in an open manner, and establishes long-term technical cooperation. Partnership, mutual benefit and common development.
In addition, Sony video surveillance system supports multi-system linkage and expansion. On the one hand, through the camera's own I / O interface, to achieve the alarm signal input and output, so as to achieve physical linkage with other weak electrical equipment. On the other hand, through the free SDK or CGI development interface provided by Sony, the Sony camera and other system software platform access functions are completed. As one of the initiators of the ONVIF standard specification, Sony always upholds the concept of openness and integration, and takes practical actions to contribute to the standardization of the security industry.
Fifth, user feedback
After the system has been running for a period of time, the operation and maintenance department has feedback that the Sony HD solution is stable, with a low failure rate and easy installation and maintenance. At the same time, Sony's outstanding product performance and high-quality image quality have been highly valued by users, providing security for the safety and high-efficiency operation of the subway Changping line, solving the difficult problems in the traditional monitoring, and achieving high-definition video surveillance. It plays an important role. “Sony’s open products and platform system provide possibilities for future multi-system compatibility and access, and it is more conducive to the development of Phase 2 of Changping Line. It has laid a good foundation for us to lay the second phase of the project’s security system. The work is simpler and more convenient, said the person in charge of the Changping line security department.
Sixth, application development
The Beijing subway bears the burden of guaranteeing the transportation in Beijing and even the surrounding districts and counties, greatly alleviating the pressure on public transport. As of 2010, the total mileage of Beijing's rail transit has reached 300 kilometers, and will reach 420 kilometers in 2012, compared with 561 kilometers in 2015. The security system has become an essential supporting project for modern subway construction. In order to ensure the safety of the subway, choosing a high-quality security system is the most important aspect of the current security system construction. From 2006 onwards, Sony began to serve the construction of monitoring projects for the Beijing Subway. Successful applications of Sony, such as the high-performance SSC-, have been implemented in Metro Line 1, Line 2, Line 4, Line 5, and Line 10. The DC573P and DC578P ultra-wide dynamic color cameras are widely deployed in the above circuits and play an active role in high-definition monitoring.
In recent years, Sony has also realized large-scale applications in new lines, such as Changping Line, Yizhuang Line, and Fangshan Line. This benefited from Sony's high quality camera's good reputation in Beijing subway applications. Sony, which has won the leading technology and stability, has also provided users with professional and perfect services while ensuring product quality, and has become a Beijing Subway security guard. One of the preferred brands for monitoring. In addition to the wide application of video surveillance cameras, Sony decoders and Sobe platform are also operating well in these newly opened projects. In the Yizhuang subway line, the Sony SSC-G918 featured wide dynamic technology, low illumination, and day/night conversion. The Sony SSC-G918 performed well at security screenings, gates, platforms, and escalators. It greatly satisfies the user's HD details. Image requirements. At the same time, with the application of Sony SNT-EX104 intelligent network video server and Sobe decoder and platform, the entire monitoring system is even more powerful, contributing to the construction of an efficient management platform, providing users with a high-definition monitoring experience. In addition, in addition to the Beijing Subway, Sony surveillance camera products have been successfully applied or are being applied to subway monitoring systems in cities such as Tianjin, Shenyang, Shanghai and Xi’an.
Conclusion
According to statistics, during the “Twelfth Five-Year Plan†period, the investment in the construction of metro rail transit will exceed 700 billion yuan. Up to now, China has approved a total of 27 cities for rail transit construction planning. By 2015, the total length of rail transit lines in China will reach 2,400 kilometers. Along with the "upsurge" of metro rail transit projects in major cities, China has become the world's largest urban metro rail transit construction market. More and more safety issues have caused the community to attach great importance to it, and the subway security system should also cater to the general trend of the security market. Intelligent, high-definition, digitalization, extensive use of new products and new technologies, and the direction of command and dispatch visualization system integration are unquestionable. No end to safety construction! Sony is willing to explore with the industry colleagues to make a contribution to the safety of rail transit in China.
Eva Resin,EVA Resin Shoe,Acetate Eva Resin
Eva Resin,Hydrogenated Hydrocarbon Resin Co., Ltd. , http://www.nsresin.com