The photoelectric sensors in active infrared receivers usually use photodiodes, phototransistors, silicon photocells, silicon avalanche diodes, etc., according to GBl0408.4-2000 "Intrusion Detector Part 4: Active Infrared Radiation Intrusion Detector": "detection When the detector is working at the detection distance specified by the manufacturer, and the radiation signal is completely or shielded by a given percentage for more than 40ms, the detector should generate an alarm state. "Why do you want to give a range? The reason is different use parts Different minimum shading time can be set (adjusted), which is helpful to reduce false alarms of the system.
The infrared beam emitted by the active infrared transmitter has a fixed divergence angle, which is stipulated in the GBl0408.4-2000 standard: "When used indoors, the transmitter and receiver are correctly installed and aligned, and work within the detection distance specified by the manufacturer. The radiation energy is 75%. When it is permanently blocked, the receiver should not generate an alarm state. "For outdoor use, the sensitivity of the infrared beam will be reduced due to the influence of temperature and sunlight. In order to reduce the false alarms caused by this, the axes of the transmitter and receiver should coincide with each other during installation and use.
Active infrared transmitters usually use infrared light-emitting diodes as the light source. Its main advantages are small size, light weight, long life, AC and DC can be used, and can be directly driven by transistors and integrated circuits. Most of the active infrared intrusion detectors use complementary self-excited multi-resonant oscillation circuits as the driving power supply, which are directly added to the two ends of the infrared light-emitting diode to make it emit pulse-modulated infrared beams with a high duty cycle. The power consumption of the power supply is reduced, and the anti-interference ability of the active infrared intrusion detector is enhanced.
We
can produce the A/SA106B/C steel pipes according to the ASME SA106 and ASTM A106 standards, YC has been
granted a number of approval certificate by international institutions, such as
Nuclear pipe certificate, 914mm Cylinder certificate, API monogram and
certificate, ISO9001 by TUV NORD, ISO14001/OHSAS18001 by CQC, approvals from
Shipping Classification Bureaus like DNV, RINA, ABS, Lloyd, GL, Bureau Veritas,
and permit of exporting to Europe as PED 2014/68/EU and AD 2000 certificates
for pressure pipes, CPD (Construction Products Directive), etc.
Chengde have been working on the research.manufacture and sale of seamless pipe about 30 years, and the advantage of core competence is more prominent by integrate in technical.management and market with PCC.
1 The Piercing and rolling technology of Chengde possesses a number of patents in designing and manufacturing the equipment. The production is efficient and flexible, and the quality is stable.
2 The material grade is complete, and the size range is wide (three produce line can manufacture all non-standard sizes). The Minimum Order Quantity (MOQ) as low as ONE piece, and the date of delivery is short with excellent cost performance.
3 The sales and service team is professional and localize.
ASTM A106 Carbon Steel Pipe
Mechanical Pipe,Astm A106 Pipe,106B Pipe,Astm A106 Carbon Steel Tube
YANGZHOU CHENGDE STEEL PIPE CO.,LTD , https://www.chengdepipe.com
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