How Does PIR (Passive Infrared) Detector Technology Work?
A: PIR-(Passive Infrared) is a passive sensing technology, meaning that the detector cannot actively emit any infrared radiation. The radiation source refers to the human body and all other objects within the line of sight of the detector, emitting thermal energy rays. Thermal energy optically reaches passive infrared sensors, such as lenses or mirrors that consist of several sections. A PIR (Passive Infrared) sensor is usually composed of dual infrared components that convert passive infrared energy into voltage. Each section in the optical lens, together with the two double sensing elements in the sensor, produces two observation areas that collect infrared radiation. The number and pattern of nodes in the optics determine the detector's viewing area.
How does microwave detection technology work?
A: The microwave channel is an active channel. The detector emits an electromagnetic signal and compares the signals reflected from all objects in the protected area. After comparing the transmitted and reflected signals using the Doppler effect, a moving object will be identified. By analyzing the Doppler signal, if the signal matches the detection criteria, a microwave warning signal will be generated. For moving objects, microwave channels are very sensitive and have much higher detection capabilities than passive infrared channels. On the other hand, microwave channels are prone to false alarms in various cases. Since microwaves penetrate the wall in practical applications, the most suitable installation cannot be achieved (the range of microwaves cannot be adjusted according to the size of the room).
How does Shuangjian (passive infrared and microwave) detector work?
A: When passive infrared and microwave channels work independently, there is not enough immunity to false positives: PIR is very sensitive to thermal radiation interference. On the other hand, microwaves are very sensitive to radio frequency interference. Integrated passive infrared and microwave technologies can significantly enhance the detector's immunity to achieve low false alarm rates. Since the alarm signal is generated only when the passive infrared technology and the microwave technology detect the intrusion at the same time, the improvement of the low false alarm rate of the detector is realized.
I found that your mobile detector includes a "sticker" with some shape, but it does not explain its usefulness in the manual. What do you expect to do with it? Is it used to block some areas on the lens?
Answer: Yes. The “stickers†included in our motion detectors are used to block some areas of the lens, which may be required in some special environments.
A: PIR-(Passive Infrared) is a passive sensing technology, meaning that the detector cannot actively emit any infrared radiation. The radiation source refers to the human body and all other objects within the line of sight of the detector, emitting thermal energy rays. Thermal energy optically reaches passive infrared sensors, such as lenses or mirrors that consist of several sections. A PIR (Passive Infrared) sensor is usually composed of dual infrared components that convert passive infrared energy into voltage. Each section in the optical lens, together with the two double sensing elements in the sensor, produces two observation areas that collect infrared radiation. The number and pattern of nodes in the optics determine the detector's viewing area.
How does microwave detection technology work?
A: The microwave channel is an active channel. The detector emits an electromagnetic signal and compares the signals reflected from all objects in the protected area. After comparing the transmitted and reflected signals using the Doppler effect, a moving object will be identified. By analyzing the Doppler signal, if the signal matches the detection criteria, a microwave warning signal will be generated. For moving objects, microwave channels are very sensitive and have much higher detection capabilities than passive infrared channels. On the other hand, microwave channels are prone to false alarms in various cases. Since microwaves penetrate the wall in practical applications, the most suitable installation cannot be achieved (the range of microwaves cannot be adjusted according to the size of the room).
How does Shuangjian (passive infrared and microwave) detector work?
A: When passive infrared and microwave channels work independently, there is not enough immunity to false positives: PIR is very sensitive to thermal radiation interference. On the other hand, microwaves are very sensitive to radio frequency interference. Integrated passive infrared and microwave technologies can significantly enhance the detector's immunity to achieve low false alarm rates. Since the alarm signal is generated only when the passive infrared technology and the microwave technology detect the intrusion at the same time, the improvement of the low false alarm rate of the detector is realized.
I found that your mobile detector includes a "sticker" with some shape, but it does not explain its usefulness in the manual. What do you expect to do with it? Is it used to block some areas on the lens?
Answer: Yes. The “stickers†included in our motion detectors are used to block some areas of the lens, which may be required in some special environments.
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