The active infrared intrusion detector consists of a pair of transmitter and receiver. The transmitter emits an infrared beam while the receiver receives the infrared beam emitted by the transmitter. When the infrared beam emitted by the transmitter is completely blocked or partially blocked by a given percentage, the receiver will generate an alarm signal because it cannot receive the infrared beam.
Active infrared detector environment requirements
Outdoor and indoor active infrared detectors have higher requirements for the application environment. According to the national standard (GB10408.4.-2000), when the active infrared detector is selected, the following requirements should be met for the applicable environment:
1, withstand high and low temperature performance: indoor type: -10 °C ~ +55 °C; outdoor type: -25 °C ~ +70 °C; relative humidity: ≤ 95%;
2, constant humidity and heat requirements: +40 ± 2 °C, RH (93 ± 2.3)%;
3, anti-vibration requirements: 10Hz ~ 55Hz sinusoidal vibration, amplitude 0.75mm; one octave / 1 minute;
4. Impact resistance requirements: Indoor type 15g, 11ms; Outdoor type 30g, 18ms. In short, outdoor requirements are significantly higher than indoor ones.
The detection distance requires that the maximum detection distance of the outdoor active infrared detector should be 6 times the nominal detection distance as required by the detector's technical requirements. Outdoor detectors need to take into account the outdoor environment and weather conditions, which means that outdoor wind, snow, rain, sand and other conditions must be able to work properly. Therefore, in actual use, the margin is often increased according to the regulations and requirements of the technical regulations. The current consensus is: “The actual detection use distance is less than or equal to 70% of the nominal value of the factoryâ€.
For example, for a detector with a nominal value of 300 meters, the distance that can be detected under ideal environmental conditions should be 1,800 meters (six times the nominal value), but it can only be used to protect walls that are ≤ 240 meters in actual use ( Fence).
Select the required beam <br> <br> on single-beam, dual-beam, four beams detector selection, conventionally have chosen two-beam active infrared intrusion detectors. In general, the normal human cross-sectional area is approximately 500mm (body width) x 200mm (body thickness) or so. For example, if a four-beam active infrared intrusion detector is selected, an infrared ray may not be blocked and an alarm may be missed. Four-beam active infrared intrusion detectors have fewer false alarms. However, it is generally advisable to use dual-beam active intrusion detectors on perimeter perimeter walls. (From the economic point of view, dual-beam active infrared detectors are also preferred), but four-beam active infrared intrusion detectors are also used in some special applications.
When installing a dual-beam active intruder, the lower beam of the detector is required to be about 150 mm away from the top of the wall. This ensures that the intruder will block the two infrared beams when they cross the wall, causing an alarm.
However, the use of a dual-beam detector (compared to a single beam) does not cause false alarms due to the blocking of a beam by small animals, leaves, etc. This improves the reliability and stability of the detector to a certain extent.
Therefore, in terms of reliability, stability, and economy, it is reasonable to select dual beam detectors for general outdoor applications.
In addition, long-range detectors generally require the use of a nominal value of ≤ 100 meters (used at a detection distance of 70 meters), so that the detection zone is always ≤ 70 meters, making it easier to locate the alarm.
Mounting positions <br> <br> active infrared intrusion detector response time of installation should be special attention. According to the national standard (GB10408.4.-2000), when the duration of the general detector beam is blocked ≥ (40 ± 10%) ms, the detector should generate an alarm signal; the duration of the beam is blocked ≤ (20 ± 10) %)ms, the detector should not generate an alarm signal. This indicates that there is an indefinite time domain for alarms (20 ± 10%) ms <occlusion time < (40 ± 10%) ms. The occlusion time is determined by the speed of the occlusion object and its occlusion volume. In order to avoid (20±10%)ms<obstruction time<(40±10%)ms(uncertain time domain for alarms), the perimeter detector is generally required to be installed on the top or outside of the wall because of the speed of climb. To be much lower than the speed of the next jump, so the climb time is more than the next jump time (when the person jumps, the blocking time may be less than 20ms) to delay the blocking time.
Other installation requirements <br> <br> should pay attention to the perimeter detectors installed must be reasonable in coordination with the perimeter of the entity, such as green, if not coordinated in advance, prone to dead ends and vulnerability, resulting in perimeter protection device is not installed properly, resulting in not reached To detect the effect. For example, in order to beautify some communities, the pillars are very tall, the column lamps are too large, the wave at the top of the fence or the distance from the top of the column, the dense branches blocking the detector rays, etc., will greatly affect the effect of the perimeter detector.
Two pairs of active infrared intrusion detectors mounted on the same straight line should be installed opposite to the transmitter or receiver. Otherwise, it will happen that the radiation of a pair of detector's transmitters enters the receiver of another pair of detectors, and the detector cannot work normally.
Therefore, during actual installation, two pairs of active infrared intrusion detectors on the same straight line should be opposite to each other at the transmitting end or the receiving end, or a detector having a frequency modulation function can also avoid interference between the transmitter and the receiver.
Active infrared detector environment requirements
Outdoor and indoor active infrared detectors have higher requirements for the application environment. According to the national standard (GB10408.4.-2000), when the active infrared detector is selected, the following requirements should be met for the applicable environment:
1, withstand high and low temperature performance: indoor type: -10 °C ~ +55 °C; outdoor type: -25 °C ~ +70 °C; relative humidity: ≤ 95%;
2, constant humidity and heat requirements: +40 ± 2 °C, RH (93 ± 2.3)%;
3, anti-vibration requirements: 10Hz ~ 55Hz sinusoidal vibration, amplitude 0.75mm; one octave / 1 minute;
4. Impact resistance requirements: Indoor type 15g, 11ms; Outdoor type 30g, 18ms. In short, outdoor requirements are significantly higher than indoor ones.
The detection distance requires that the maximum detection distance of the outdoor active infrared detector should be 6 times the nominal detection distance as required by the detector's technical requirements. Outdoor detectors need to take into account the outdoor environment and weather conditions, which means that outdoor wind, snow, rain, sand and other conditions must be able to work properly. Therefore, in actual use, the margin is often increased according to the regulations and requirements of the technical regulations. The current consensus is: “The actual detection use distance is less than or equal to 70% of the nominal value of the factoryâ€.
For example, for a detector with a nominal value of 300 meters, the distance that can be detected under ideal environmental conditions should be 1,800 meters (six times the nominal value), but it can only be used to protect walls that are ≤ 240 meters in actual use ( Fence).
Select the required beam <br> <br> on single-beam, dual-beam, four beams detector selection, conventionally have chosen two-beam active infrared intrusion detectors. In general, the normal human cross-sectional area is approximately 500mm (body width) x 200mm (body thickness) or so. For example, if a four-beam active infrared intrusion detector is selected, an infrared ray may not be blocked and an alarm may be missed. Four-beam active infrared intrusion detectors have fewer false alarms. However, it is generally advisable to use dual-beam active intrusion detectors on perimeter perimeter walls. (From the economic point of view, dual-beam active infrared detectors are also preferred), but four-beam active infrared intrusion detectors are also used in some special applications.
When installing a dual-beam active intruder, the lower beam of the detector is required to be about 150 mm away from the top of the wall. This ensures that the intruder will block the two infrared beams when they cross the wall, causing an alarm.
However, the use of a dual-beam detector (compared to a single beam) does not cause false alarms due to the blocking of a beam by small animals, leaves, etc. This improves the reliability and stability of the detector to a certain extent.
Therefore, in terms of reliability, stability, and economy, it is reasonable to select dual beam detectors for general outdoor applications.
In addition, long-range detectors generally require the use of a nominal value of ≤ 100 meters (used at a detection distance of 70 meters), so that the detection zone is always ≤ 70 meters, making it easier to locate the alarm.
Mounting positions <br> <br> active infrared intrusion detector response time of installation should be special attention. According to the national standard (GB10408.4.-2000), when the duration of the general detector beam is blocked ≥ (40 ± 10%) ms, the detector should generate an alarm signal; the duration of the beam is blocked ≤ (20 ± 10) %)ms, the detector should not generate an alarm signal. This indicates that there is an indefinite time domain for alarms (20 ± 10%) ms <occlusion time < (40 ± 10%) ms. The occlusion time is determined by the speed of the occlusion object and its occlusion volume. In order to avoid (20±10%)ms<obstruction time<(40±10%)ms(uncertain time domain for alarms), the perimeter detector is generally required to be installed on the top or outside of the wall because of the speed of climb. To be much lower than the speed of the next jump, so the climb time is more than the next jump time (when the person jumps, the blocking time may be less than 20ms) to delay the blocking time.
Other installation requirements <br> <br> should pay attention to the perimeter detectors installed must be reasonable in coordination with the perimeter of the entity, such as green, if not coordinated in advance, prone to dead ends and vulnerability, resulting in perimeter protection device is not installed properly, resulting in not reached To detect the effect. For example, in order to beautify some communities, the pillars are very tall, the column lamps are too large, the wave at the top of the fence or the distance from the top of the column, the dense branches blocking the detector rays, etc., will greatly affect the effect of the perimeter detector.
Two pairs of active infrared intrusion detectors mounted on the same straight line should be installed opposite to the transmitter or receiver. Otherwise, it will happen that the radiation of a pair of detector's transmitters enters the receiver of another pair of detectors, and the detector cannot work normally.
Therefore, during actual installation, two pairs of active infrared intrusion detectors on the same straight line should be opposite to each other at the transmitting end or the receiving end, or a detector having a frequency modulation function can also avoid interference between the transmitter and the receiver.
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Product features
1. The lamp body is made of aluminum alloy with the column in high strength
2. Static powder spray coating process with many different colors for options
3. The LED lighting modules give the highest lighting output to produce the optiumum light beam control and visual comfort.
4. Protection:IP54
5. Heart radiation structure design for lighting assembly,greatly enhancing the stability and lifespan of the lamp.
6. LED Lighting columns with RGB and change program comprising artistic design elements.
7. Reasonable design for assembling and disassembling,convenient for installation and maintenance.
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Jiangsu chengxu Electric Group Co., Ltd , https://www.chengxulightings.com