Capacitance type acceleration sensor
专利汇可以提供Capacitance type acceleration sensor专利检索，专利查询，专利分析的服务。并且PURPOSE: To return an abnormal measuring condition to the normal measuring condition when a moving electrode of a capacitance type acceleration sensor is attracted to an opposed fixed electrode by detecting the abnormal measuring condition to release the attraction thereof.
CONSTITUTION: A DC voltage V
0 is applied between both electrodes of a capacitance type acceleration sensor and a voltage V
s related to a capacitance C
v is outputted through a Schumitt trigger circuit 61 and a f/V converter 62. The voltage V
s is compared with a reference voltage V
ref lower slightly than the maximum voltage value as given when both the electrodes are attracted using a comparator 64. When the above voltage V
s is larger than the reference voltage V
ref , a single pulse with a pulse width (t) is outputted from a one-shot multivibrator 65. The output pulse make a normally closed switch S
v on a wire with which a DC voltage V
0 is applied between both the electrodes open temporarily to cut the DC voltage V
0 . Thus, the capacitance type acceleration sensor is returned to the normal measuring condition immediately even when attraction occurs between both the electrodes by a static power under an excessive load.
COPYRIGHT: (C)1992,JPO&Japio，下面是Capacitance type acceleration sensor专利的具体信息内容。
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