Sensor device for reducing erroneous activation of a light source

摘要

A sensor device includes a sensor that transmits radio waves of a predetermined frequency and receives reflected waves of the transmitted radio waves. The sensor device detects presence of a moving body based on a difference between a frequency of the transmitted radio waves and a frequency of the reflected waves to activate a light source in accordance with the detection. A processor generates a sensor signal indicating the detection of the sensor. A determination unit determines whether or not the sensor signal has an intensity that is greater than a predetermined threshold. A controller controls activation of the light source when determined that the intensity of the signal is greater than the threshold. The controller restricts activation of the light source when determined that the intensity of the sensor signal is greater than the threshold until a first specified time elapses from the determination.

主权项

1. A sensor device for reducing erroneous activation of a light source comprising:
a sensor that transmits radio waves of a predetermined frequency and receives reflected waves of the transmitted radio waves, wherein the sensor device detects presence of a moving body based on a difference between a frequency of the transmitted radio waves and a frequency of the reflected waves to activate the light source in accordance with the detection; a processor that generates a sensor signal indicating the detection of the sensor; a determination unit that determines whether or not the sensor signal has an intensity that is greater than a predetermined threshold; and a controller that controls activation of the light source when it is determined that the intensity of the sensor signal is greater than the threshold, wherein the controller restricts activation of the light source when it is determined that the intensity of the sensor signal is greater than the threshold until a first specified time elapses from the determination, wherein when it is determined that the intensity of the sensor signal is less than or equal to the threshold in a predetermined second specified time and it is determined that the intensity of the sensor signal is greater than the threshold after the second specified time elapses, the controller restricts activation of the light source from when it is determined that the intensity of the sensor signal is greater than the threshold to when the first specified time elapses.