SELF-CALIBRATION METHOD FOR A PHOTOELECTRIC LIQUID LEVEL SWITCH AND APPARATUS USING THE SAME
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United States of America Patent
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Issued Date -
Sep 18, 2014
app pub date -
Mar 13, 2013
filing date -
Mar 13, 2013
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Abandoned
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Abstract
The invention relates to a self-calibration method for a photoelectric liquid level switch and apparatus using the same. The apparatus has a control module, a light emitting module and a light sensing module. The light emitting module emits a light beam into a container. The light sensing module then detects a reflected light beam. The control module acquires two values respectively standing for a first liquid level status and a second liquid level status. When a default threshold value is beyond a range between the two values, the control module calculates a new threshold value in the range between the two values. The control module then replaces the default threshold value with the new threshold value. The threshold value is adjustable for any kind of liquid.
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