Field equipment photoelectric sensing sensitivity adjustment
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United States of America Patent
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Mar 3, 2015
Grant Date -
Apr 5, 2012
app pub date -
Oct 4, 2010
filing date -
Oct 10, 2009
priority date (Note) -
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Abstract
A photoelectric sensing sensitivity adjusting device includes: an LED for emitting light by being supplied with energy (current or voltage); a regulator for LED driving for supplying the energy to the LED; a light receiving device for receiving the light emitted from the LED; a digital potentiometer for controlling increase or decrease of the energy to be supplied to the LED; a CPU for digitally controlling, according to a control program, the increase or decrease of the energy to be supplied to the LED; and a photodetection portion for detecting an optical signal, converting the optical signal to an electrical signal, and outputting the electrical signal.
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