INFRARED SENSOR DEVICE,申请号JP20060261462-传众专利搜索

INFRARED SENSOR DEVICE

申请公布号：JP2008082789(A)

申请号：JP20060261462

申请日期：2006.09.26

申请公布日期：2008.04.10

申请人：

MATSUSHITA ELECTRIC WORKS LTD

发明人：HYODO SATOSHI

分类号：G01J1/02;H04N5/33

主分类号：G01J1/02

摘要：PROBLEM TO BE SOLVED: To provide an infrared sensor device suppressing variations in the detection accuracy of a sensor element, which is caused by ambient temperature. SOLUTION: A measurement means 8 measures a measurement value corresponding to the resistance value of the sensor element S with an electric current fed through the sensor element S comprising a resistance bolometer by applying a read voltage to a sensor circuit 7. An offset-value register 20 holds, as an offset value, the measurement value obtained through measurement by the measurement means 8, in the state of the sensor element S not receiving any infrared rays. A detection value register 21 detects, as a detection value, a difference between the measurement value obtained through the measurement by the measurement means 8 and the offset value, in the state of the sensor element S receiving the infrared rays. Before a measurement period during which the read voltage is impressed on the sensor circuit 7, the measurement means 8 is provided with an idling period during which idling operation for impressing a voltage of a prescribed idling value on the sensor circuit 7 is performed until the temperature of the sensor element S becomes stable. COPYRIGHT: (C)2008,JPO&INPIT