Fresnel lens capture the IR signal from human body, gather these signal into PYRO ( pyroelectric passive infrared sensor ), PYRO transfer it to electrical signal. When a intruder made into a zone range, the intrusion was detected by detector, the detector will generate a alarm signal.
The integration of demand, simulation and walking test is the most direct embodiment of PIR R&D capabilities. It includes the ability of simulation design, the accumulation of industry experience, the understanding of product application scenarios, and the reflection of testing rigor.
We can adjust the design based on user scenarios, so that the product has a better user experience.
Scenario 1: The detection distance varies with the vertical installation angle of product.
Scenario 1: The detection distance does not change with the vertical installation angle of product.
The two most important performance indicators of PIR are false triggering and missed triggering, while the design of industry general level is generally designed and tested only for missed triggering. Because there is no relevant industry rule to evaluate the false triggering, the user experience of false triggering is poor when PIR is used to achieve energy-saving control, intelligent control, etc. Based on the comprehensive evaluation and design, we make the false triggering and missed triggering of products have ideal performance.
For many outdoor applications, scene state may seriously affect the detection performance of PIR. For example, under normal circumstances, the ambient temperature is very uniform, the temperature difference between people and the environment is well defined, and PIR works normally. When the situation shown in the right figure occurs, although the ambient temperature is about 20 ° C, it is very suitable for PIR to work, but the ground temperature reaches 29 ° C, which is close to the human temperature.At this time, if PIR is detected through the lower part of the human body, it is easy to miss triggering.
After years of efforts, the PIR lens material we developed has significantly improved its far-infrared transmittance, visible light suppression and anti-aging effect. The colors include black, gray, milky white and translucent. Transmittance is focus on wavelength between 5um-14um。
--outdoor aging test have more accurate result than UV light + spray test.
Aging test environment 1
Aging test environment 2
Aging test environment 3
Based on PIR technology is the main technical means of intelligent lighting control