OBJECT DETECTION DEVICE AND ILLUMINATION SYSTEM PROVIDED THEREWITH

摘要

An object detection device comprises an active sensor, an amplifying circuit configured to divide and amplify a sensor signal outputted from said active sensor with respect to each a plurality of frequency bands through each amplifier, and a determining unit determining the presence or absence of a detection target object by comparing an output of said amplifying circuit with a predetermined threshold value. A noise determining unit controls a switching circuit so as to turn off a switch inserted between said determining unit and an amplifier having a band pass including a noise of a particular frequency, when determining that the noise of the particular frequency is produced constantly by using an analysis result outputted from a frequency analyzer detecting intensity of each frequency of the sensor signal.