Sulfuric acid concentration sensor for lead storage battery
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United States of America Patent
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Jan 23, 1996
Grant Date -
N/A
app pub date -
Mar 15, 1994
filing date -
Sep 18, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A sulfuric acid concentration sensor for a lead storage battery comprising a quartz resonator changing its characteristic frequency in a manner of single-valued function according to the change of sulfuric acid concentration and an oscillation circuit (20) oscillating the quartz resonator, the quartz resonator is immersed in an electrolyte (6) so as to be oscillated, and a characteristic frequency of the quartz resonator at this moment is obtained so as to determine the sulfuric acid concentration. The sensor of this invention is compact in its size, simple in its structure and cheap in its cost, so that it can be applied to a lead storage battery for automobile.
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