Radar-sensing luminaires are increasingly used in underground parking lots, stairway aisles and wardrobes due to their high sensitivity and concealed installation. Friends of the lighting micro-classroom should remember that we once published an article "Underground Parking Lighting Design | Lighting Fool Book Series", which specifically talked about several design practical tips that can be referenced for a garage lighting project.
Due to the characteristics of radar sensing technology, if used improperly, it will cause the sensor's sensing function to be abnormal or even impossible to use.
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Generally, the microwave radar senses the LED lamp product, and the drive circuit actively transmits the microwave signal with a frequency of 5.8 GHz. When there is a moving object outside, the Doppler effect is obtained. (When the wave source moves toward the observer, the receiving frequency becomes high, When the wave source is far away from the observer, the receiving frequency becomes lower. The signal is fed back to the transmitting device, triggering the lamp to change state, from light to full.
However, when multiple radar-sensing luminaires are installed together, if the luminaires are too close together, the radar signal from the A luminaire may be received by the B luminaire, so that the feedback signal received by the B luminaire is not the signal returned by itself. It is the transmitting signal of the A luminaire, and the form of the signal interference is superimposed or mutually offset, thus causing the radar sensing products to interfere with each other.
Common misoperations in the interference state are:
Steady on (the device is always in the trigger state)
Normally dark (device cannot be triggered)
Short sensing distance
So, how many intervals are suitable for the installation of multiple radar-sensing luminaires?
After many practical tests, the interval between the two lamps was maintained at 1.8 meters or more, and there was basically no interference. as the picture shows:
Finally, if you want to be more energy efficient, you can use "intelligent sensor tube". We are here to remind you two things:
1. Don't choose the kind of light that senses "switch", you should choose the induction "dimming". Normal operation 11W, low power 2W. To ensure that there is a certain amount of basic safety lighting throughout the field when operating at low power.
2. The sensing range of the lamp should be large. When the car is turned to the light, he lights up, then it is late~~ Remember: driving is to look at the front!
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