公开(公告)号：US5377547A

公开(公告)日：1995-01-03

申请号：US118678

申请日：1993-09-10

申请人： Hiroki Kusakabe ,  Tohru Okauchi ,  Masuo Takigawa

发明人： Hiroki Kusakabe ,  Tohru Okauchi ,  Masuo Takigawa

IPC分类号： G01L9/08 ,  G01L9/00 ,  G01L23/10 ,  C01L9/08

CPC分类号： G01L23/10 ,  G01L9/008 ,  Y10T29/42

摘要： A piezoelectric pressure sensor includes a generally elongated sensor housing, a pressure receiving plate disposed at a first end of the sensor housing with a first surface thereof serving as a pressure receiving surface for receiving a pressure applied from outside of the sensor housing, a pressure transmission member accommodated in the sensor housing with a first end thereof held in contact with a second surface of the pressure receiving plate, and a tubular piezoelectric element accommodated in the sensor housing with a first end thereof held in contact with a second end of the pressure transmission member. A pair of electrodes are formed on the external and internal surfaces of the piezoelectric element, respectively. An external charge detection member is held in contact with the external electrode for collecting charge generated by the external electrode and is encircled by a heat-shrinkable tube, while an internal charge detection member is held in contact with the internal electrode for extracting charge therefrom. A fixing screw is threaded into the sensor housing for holding in a prestressed fashion the piezoelectric element and the pressure transmission member against the pressure receiving plate. During assemblage of the pressure sensor, the heat-shrinkable tube undergoes a thermal shrinkage upon application of heat thereto, thereby compressing the external charge detection member radially inwardly against the external electrode.

摘要翻译： 压电压力传感器包括大致细长的传感器壳体，压力接收板，设置在传感器壳体的第一端，其第一表面用作用于承受从传感器外壳外部施加的压力的受压表面，压力传递 容纳在所述传感器壳体中的构件，其第一端保持与所述受压板的第二表面接触;以及管状压电元件，容纳在所述传感器壳体中，其第一端保持与所述压力传递的第二端接触 会员。 一对电极分别形成在压电元件的外表面和内表面上。 外部电荷检测部件与外部电极保持接触，用于收集由外部电极产生的电荷，并且由热收缩管环绕，同时内部电荷检测部件与内部电极保持接触，用于从其中提取电荷。 固定螺钉被拧入传感器外壳中，以预应力的方式将压电元件和压力传递元件保持抵靠压力接收板。 在压力传感器的组装期间，热收缩管在施加热量时经受热收缩，从而将外部电荷检测部件径向向内压靠在外部电极上。