Abstract:
This system is a no touch single pole single throw (spst) two wire electronic light switch that uses an Infrared Proximity Detector to create a working system designed to replace existing mechanical switches common in households. The use of a Micro Controller enables the system to adapt to different loads and load types while requiring a minimum number of parts to perform the necessary tasks.
Abstract:
This system is a no touch single pole single throw (spst) two wire electronic light switch that uses an Infrared Proximity Detector to create a working system designed to replace existing mechanical switches common in households. The use of a Micro Controller enables the system to adapt to different loads and load types while requiring a minimum number of parts to perform the necessary tasks.
Abstract:
In a reflection type proximity detector or method, a controller calculates a calibration value based on ambient conditions with the transmitter off and then performs tests. In each test, the calibration value is added to and subtracted from a measured value taken with the transmitter in one state (on or off) and a second measured value is then taken and compared with this range. In tests where the transmitter is switched from off to on between the measurements and the second value exceeds the range, and tests where the transmitter is switched from on to off between the measurements and the second value is below the range, an object is detected. When the transmitter does not switch states between the measurements, and the second value is less than or greater than the range, then no object is detected, as the change in measured value likely resulted from an outside signal.
Abstract:
In a reflection type proximity detector or method, a controller calculates a calibration value based on ambient conditions with the transmitter off and then performs tests. In each test, the calibration value is added to and subtracted from a measured value taken with the transmitter in one state (on or off) and a second measured value is then taken and compared with this range. In tests where the transmitter is switched from off to on between the measurements and the second value exceeds the range, and tests where the transmitter is switched from on to off between the measurements and the second value is below the range, an object is detected. When the transmitter does not switch states between the measurements, and the second value is less than or greater than the range, then no object is detected, as the change in measured value likely resulted from an outside signal.