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Optical sensor, optical current sensor and optical voltage sensor
Optical sensor, optical current sensor and optical voltage sensor
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机译:光学传感器,光学电流传感器和光学电压传感器
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摘要
A simple constitution together with an easy calibration of output by realizing a fast light intensity detection method is realized without using the carrier signal.;An optical sensor, including: a sensor to which light from a light source is lead, and by which light intensity of the light is modulated based on a physical value; light receiving elements 61 and 62 receiving two elements of divided light PA and PB having polarized waves which are orthogonally crossing each other; a variable optical attenuator operating light which is received by the light receiving elements 61 and 62; and a variable amplifier operating output signals from the light receiving elements 61 and 62, wherein both a zero point of a sensor output and sensitivity are calibrated based on a light attenuation factor or an amplification factor which is adjusted when a physical value is detected by calculating a ratio between a sum and a difference of outputs of the light receiving elements 61 and 62. 展开▼