Pressure sensor comprising a silicon body
    3.
    发明授权
    Pressure sensor comprising a silicon body 失效
    包括硅体的压力传感器

    公开(公告)号:US5024097A

    公开(公告)日:1991-06-18

    申请号:US411193

    申请日:1989-09-20

    IPC分类号: G01L9/04 G01L1/18 G01L9/00

    摘要: A pressure sensor comprising a silicon body (1) which is arranged on a substrate (2). The silicon body (1) comprises a cavity (4) in the form of a blind hole, or enclosed chamber which thus forms a diaphragm (5). On the outer surface thereof there is arranged a Wheatstone bridge consisting of piezoresistive resistance elements (6, 7, 8, 9). The voltage/pressure characteristic of this pressure sensor exhibits a non-linearity of more than 1% in the case of pressure loads in excess of 250 bar. This non-linearity must be reduced. Therefore, a further cavity (10) is provided in the silicon body (1) on both sides of the resistance elements (8, 9) arranged at the edge of the diaphragm (5).

    摘要翻译: 一种压力传感器,包括布置在基板(2)上的硅体(1)。 硅体(1)包括盲孔形式的空腔(4),或由此形成隔膜(5)的封闭室。 在其外表面上布置有由压阻电阻元件(6,7,8,9)组成的惠斯通电桥。 在压力负载超过250巴的情况下,该压力传感器的电压/压力特性表现出大于1%的非线性。 这种非线性必须减少。 因此,在设置在隔膜(5)的边缘处的电阻元件(8,9)的两侧的硅体(1)中设置另外的空腔(10)。

    Differential pressure transducer
    4.
    发明授权
    Differential pressure transducer 失效
    差压传感器

    公开(公告)号:US4531415A

    公开(公告)日:1985-07-30

    申请号:US541945

    申请日:1983-10-14

    CPC分类号: G01L13/025 G01L9/0075

    摘要: A differential pressure transducer having a body of insulating material on which film electrodes are fixed, two diaphragms made of insulating material, and two film electrodes on the inner sides of the respective diaphragms facing the body. The diaphragms and the body together form cavities which are filled with an incompressible liquid, and the film electrodes of the body and of the diaphragms form capacitances which are dependent on the diaphragm deflection. The transducer is especially suitable for the measurement of the flow rate of explosive liquids or gasses.

    摘要翻译: 一种差压传感器,其具有绝缘材料体,薄膜电极固定在该主体上,两个由绝缘材料制成的隔膜,以及面向主体的相应隔膜内侧的两个薄膜电极。 隔膜和主体一起形成填充有不可压缩液体的空腔,并且主体和隔膜的膜电极形成取决于隔膜偏转的电容。 传感器特别适用于测量爆炸性液体或气体的流量。