Piezoelectric acceleration sensor
专利汇可以提供Piezoelectric acceleration sensor专利检索，专利查询，专利分析的服务。并且PURPOSE: To obtain a sensor of high capacity stable in output by removing the effect of noise output due to pyroelectric effect by forming a pedestal and divided load bodies provided so as to sandwich the film like piezoelectric body of a piezoelectric acceleration sensor from materials close in heat conductivity to each other and making temp. difference hard to generate between the electrodes on both surfaces of the piezoelectric body.
CONSTITUTION: A film-like piezoelectric body 13 is fixed to the measuring surface 12 of a pedestal 11 and a load body 14 functioning as an inertial mass part is bonded thereto. The load body 14 is separated into divided load bodies 14a - 14c and, when the constitutional material of the load body 14a is selected, the difference in heat conductivity between said material and the constitutional material of the pedestal 11 is set to relation represented by formula 0.8 (KB/tB) ≤ (KW/tW) ≤ 1.2 (KB/tB) (wherein tW is the thickness of the load body 14a, KW is the heat conductivity of the load body 14a, tB is the thickness of the pedestal and KB is the heat conductivity of the pedestal). When this relation is satisfied, even when there is a temp. change in the arrangement place of the sensor, the difference between heat conduction speeds to both electrodes of the piezoelectric body 13 is reduced and temp. difference is also sufficiently reduced and, therefore, the output of pyroelectric effect is reduced and noise output can be reduced.
COPYRIGHT: (C)1991,JPO&Japio，下面是Piezoelectric acceleration sensor专利的具体信息内容。
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6 热电元件
