公开(公告)号：US09857259B2

公开(公告)日：2018-01-02

申请号：US14501310

申请日：2014-09-30

Applicant: Rosemount Inc.

Inventor： David Andrew Broden ,  Charles Ray Willcox ,  Donald Edward Harasyn

IPC: G01L9/00 ,  G01L11/02 ,  G01L19/06

CPC classification number: G01L9/0075 ,  G01L9/0072 ,  G01L11/025 ,  G01L13/025 ,  G01L19/0038 ,  G01L19/0084 ,  G01L19/0681

Abstract: A capacitance-based pressure sensor for measuring a process variable includes a metal sensor body, a diaphragm disposed within a cavity of the metal sensor to form a deflectable capacitor plate, and an insulator extending through the metal sensor body from an end wall to the cavity. The pressure sensor further includes an isolation tube in fluid connection with the cavity, the isolation tube extending into the insulator through the end wall, a stationary capacitor plate on a surface of the insulator in the cavity, the stationary capacitor plate spaced from the diaphragm, and an electrical lead wire connected to the stationary capacitor plate and extending through the insulator parallel to the isolation tube and exiting the insulator at the end wall. A fill fluid is within the isolation tube and the cavity to apply pressure to the diaphragm.

公开(公告)号：US20160091379A1

公开(公告)日：2016-03-31

申请号：US14501310

申请日：2014-09-30

Applicant: Rosemount Inc.

Inventor： David Andrew Broden ,  Charles Ray Willcox ,  Donald Edward Harasyn

IPC: G01L9/00

CPC classification number: G01L9/0075 ,  G01L9/0072 ,  G01L11/025 ,  G01L13/025 ,  G01L19/0038 ,  G01L19/0084 ,  G01L19/0681

Abstract: A capacitance-based pressure sensor for measuring a process variable includes a metal sensor body, a diaphragm disposed within a cavity of the metal sensor to form a deflectable capacitor plate, and an insulator extending through the metal sensor body from an end wall to the cavity. The pressure sensor further includes an isolation tube in fluid connection with the cavity, the isolation tube extending into the insulator through the end wall, a stationary capacitor plate on a surface of the insulator in the cavity, the stationary capacitor plate spaced from the diaphragm, and an electrical lead wire connected to the stationary capacitor plate and extending through the insulator parallel to the isolation tube and exiting the insulator at the end wall. A fill fluid is within the isolation tube and the cavity to apply pressure to the diaphragm.

Abstract translation: 用于测量过程变量的基于电容的压力传感器包括金属传感器主体，设置在金属传感器的空腔内以形成可偏转电容器板的隔膜以及从端壁延伸到空腔的绝缘体 。 压力传感器还包括与空腔流体连接的隔离管，隔离管通过端壁延伸到绝缘体中，在空腔中的绝缘体的表面上的固定电容器板，与隔膜间隔开的固定电容器板， 以及连接到固定电容器板并且平行于隔离管延伸穿过绝缘体并在端壁处离开绝缘体的电引线。 填充流体在隔离管和空腔内，以向隔膜施加压力。