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Differential pressure sensor

一种传感器、压差的技术，应用在仪器、多个阀之间的压力差测量、测量流体压力等方向，能够解决迟滞误差等问题

Active Publication Date: 2019-10-22
ENDRESS HAUSER GMBH CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This can lead to hysteresis errors in particular in the zero point and in the measuring range of the measuring signal of the differential pressure sensor which is dependent on the differential pressure

Method used

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  • Differential pressure sensor
  • Differential pressure sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0049] figure 1 The differential pressure sensor 1 shown in includes a differential pressure measuring cell 2 having a measuring membrane 10, a first platform 20 and a second platform 30, wherein the measuring membrane 10 is arranged between the first platform and the second platform, and along the periphery The junction pressure-tightly connects the two platforms such that a first pressure chamber 22 is formed between the first platform and the measuring membrane and a second pressure chamber is formed between the second platform and the measuring membrane. The pressure chamber can be contacted via the pressure supply line 24, 34 respectively to the first or the second pressure, wherein the measuring membrane is deflectable according to the difference between the two pressures, and wherein the differential pressure measuring unit has, in particular, a capacitive or piezoresistive transducer. The sensor converts the deflection of the measuring membrane into an electrical signa...

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Abstract

The differential pressure sensor comprises: a differential pressure measuring unit with a measuring membrane and two platforms with the measuring membrane arranged therebetween and a transducer; and an elastic clamping device with two clamping regions, each of which acts on On the corresponding rear side of the platform of the measuring membrane, wherein the clamping device has at least one elastic element, the clamping area is mechanically coupled by at least one elastic element, so as to clamp the differential pressure measuring cell with an axial clamping force, wherein the clamping The clamping area is rigid, wherein the clamping device comprises a clamp with two clamping bodies, each clamping body has one of the clamping areas, wherein at least one clamping body has an elastic element, the clamping bodies are mutually under stress connected so as to exert a clamping force on the differential pressure measuring unit, wherein the two clamping bodies have a central shape-retaining section including the clamping area, wherein the elastic section Adjoining on said shape-retaining section of the body, the elastic section forms an elastic element.

Description

technical field [0001] The invention relates to a differential pressure sensor, in particular to a differential pressure sensor with protection against static overload. Background technique [0002] Differential pressure sensors are usually optimized to measure the presence of large static pressures p 1 ,p 2 small pressure difference p 1 -p 2 . In this case, it is important to achieve the correct balance of sensitivity and overload resistance. Thus, for example, |p 1 -p 2 | / p 1 <1% can be applied to differential pressure|p 1 -p 2 |Measurement range. When missing pressure p in process installation 1 ,p 2 One, the differential pressure sensor is loaded 100 times the measuring range. Differential pressure transducers that are resistant to these overloads are known. An effective protection of the sensitive differential pressure measuring cell consists in connecting the overload membrane hydraulically in parallel with the differential pressure sensor, wherein the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L13/02G01L19/06G01L19/14
CPCG01L13/026G01L19/0618G01L19/142G01L13/025G01L19/143
Inventor 英·图安·塔姆彼得·克勒费尔拉斐尔·泰伊朋本杰明·莱姆克
Owner ENDRESS HAUSER GMBH CO KG