Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Using radiant energy
Patent
1998-11-24
2000-05-02
Strecker, Gerard
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Using radiant energy
3242441, 25022714, G01R 1900, G01R 33032, G01R 1702
Patent
active
060576782
ABSTRACT:
An optical sensor apparatus capable of accurate measurement without using a filter circuit, and therefore being further capable of pulse driving an LED and thus reducing power consumption, is provided. To achieve such an optical sensor apparatus, when an optical current sensor 10 is not sensing the current to be measured, an optical current sensor signal processing circuit 11 first supplies dc light of a specific intensity to the optical current sensor 10, and then adjusts the intensity of the light so that the intensity of light returned from the optical current sensor 10 to the signal processing circuit 11 is a specific predetermined value. When the optical current sensor 10 is sensing the current, the signal processing circuit 11 electrically processes the optical signal from the optical current sensor 10 to measure the current.
REFERENCES:
patent: 4540937 (1985-09-01), Asars
patent: 4694243 (1987-09-01), Miller et al.
patent: 5747793 (1998-05-01), Sunderg et al.
patent: 5963034 (1999-10-01), Mahapatra et al.
Ishiko Daisuke
Tagiri Satoshi
Matsushita Electric - Industrial Co., Ltd.
Strecker Gerard
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