Title: Detection object detecting device and method using optical sensor
Application Number: 200610108093 Application Date: 2006.07.27
Publication Number: 1905368 Publication Date: 2007.01.31
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H03K17/18;G01V8/12
Applicant(s) Name: Nippon Electric Co. Address:
Inventor(s) Name: Sekiyama Shigero
Attorney & Agent: li xianglan
Abstract:
    Provided is a detection object detecting device and method using optical sensor, to reduce the processing time required for detecting the reference voltage and to avoid the processing for sequentially detecting the output voltage level of a light receiving element during operation of detecting a detection object. The detection object detecting apparatus includes an optical sensor having a light emitting element and a light receiving element and has the optical sensor arranged so that light from the light emitting element up to the light receiving element passes through the position of a detection object so as to detect the existence of the detection object by an output state of the optical sensor, is provided with; a reference voltage generation part, a comparator for comparing an output from the optical sensor with reference voltage outputted from the reference voltage generation part and detecting the existence of the detection object in accordance with the compared result, and a control part for supplying a control signal for outputting the reference voltage from the reference voltage generation part; and constituted so that the control part acquires the output value of the optical sensor before detecting the detection object and determines the reference voltage for detecting the existence of the detection object on the basis of the acquired output value.
Time: 8