半導体レーザを用いた画像膨張による進入検出センサ

Abstract

Since the conclusion of Kyoto Protocol, the necessity for rationalization of energy use has been increased. Therefore, it is advisable that an escalator is controlled to pause during no user. Now a photo-electric sensor is used for escalator control, but a pole to install the sensor is needed. Then, a new type of approach sensor using the semiconductor laser and the CCD camera has been studied. The laser beam which focused perpendicularly by the cylindrical lens is irradiated at a target in only the field I of the interlace video signal, and is observed by a CCD camera. The irradiation area of laser beam is obtained by subtracting field II from field I. If the area is increasing in time, it will be judged that the target is approaching. Moreover, the error decreases by using a visible-light cut filter, and it is found that application for an approach sensor mountable into escalator is possible.