![]() In the literal sense of the words motion detection is meant to detect movement of humans and interested objects only rather than presence (occupancy). When the signal amplitude exceeds an established threshold, a control signal is generated to trigger a prescribed action. The amplitude of the signal is subsequently evaluated over a window comparator or by a digital light controller to determine whether this constitutes a motion. The electrical signal is then processed by electronic circuitry which filters signals from noise and amplifies the signal to a useful level. The resulting change or stimulus is converted into a change in the output voltage which is referred to as an electrical signal. It detects movement within its range of sensitivity and measures changes in a targeted variable. What is a motion sensorĪ motion sensor is switching or dimming lighting control that exercises control over the connected lighting load upon the occurrence of a sensing event. Beyond improved source efficiency, LED outdoor lighting provides opportunities for additional energy savings through its highly controllable illumination. With instantaneous dimming capability, LEDs bring a new level of flexibility in intensity control to outdoor lighting. They can be cycled on and off without delays in warm-up and restrike and work under any switching frequency without premature failures. These semiconductor devices are fundamentally controllable. LEDs are electroluminescent devices that produce light through recombination of holes and electrons in InGaN quantum wells. ![]() Frequent on/off cycling can significantly reduce their rated lifetime.Īs LED technology moves the boundaries of lighting performance to the next plateau, motion sensors started to make headlines in intelligent lighting applications. The device stability of traditional light sources over long switching cycles remains a critical issue. Adaptive lighting based on motion sensing places a stringent demand on the electrical switch durability of the light source. Motion-based controls had been struggling to find their feet in outdoor lighting applications that were the realms of incandescent lamps, compact fluorescent lamps (CFLs) and high-intensity discharge (HID) lamps then. LEDs and motion sensors are great companions They serve to create visual guidance and enhance the aesthetic appeal of the landscape.
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