光・電気統合型センサによる非接触材質識別

概要

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In this paper, an optical and electric integrated sensor as a new non-contact sensor for the distance detection and material discrimination is proposed. The proposed sensor uses a pair of CdS cells as the electrodes of the plane type capacitance sensor and measures capacitance at several conditions of light emitting. Several coupling capacitance values are obtained by a pair of CdS cells because resistance of CdS changes by the quantity of light. Accordingly, the electrical and optical properties of the object are obtained from capacitance values. In this experiment, discrimination of seven kinds of sample materials and detection of the distance between the sensor and the material were demonstrated by the optical and electrical integrated sensor. As a result, it was suggested that discrimination of seven kinds of materials and detection of the distance between 1mm and 5mm were possible by the proposed sensor.
2006-08-01