Protective device

A technology for protecting devices and installation states, applied in measuring devices, instruments, measuring fluid pressure, etc., can solve problems such as sensor element damage, achieve rapid pressure changes, and increase resonance frequency and limit frequency.

Active Publication Date: 2020-08-28
KISTLER HLDG AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Depending on the intensity of the electromagnetic radiation, electromagnetic radiation may cause damage to the membrane and / or the sensor element

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0030] figure 1 A cross-sectional view of a protective device 1 according to a preferred embodiment is shown, which has a sensor 2 in a mount 4 . For clarity, sensor 2 is not hatched.

[0031] The sensor 2 is substantially rod-shaped along the longitudinal axis Z. The sensor 2 is installed in the mounting part 4 . Preferably, the sensor 2 is introduced into the mount 4 . The mount 4 defines a chamber volume 11 which is to be used for determining the physical variable. A medium is present in the chamber volume 11 , which is the carrier of physical variables. On the end of the sensor 2 facing the chamber volume 11 , the sensor 2 has a membrane 3 which is parallel to the first radial axis X and parallel to the second radial axis Y. The longitudinal axis Z, the first radial axis X and the second radial axis Y form an orthogonal system. The first radial axis and the second radial axis form a radial plane XY. The medium acts on the membrane 3 .

[0032] In one specific embod...

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PUM

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Abstract

The invention relates to a protective device (1) for a diaphragm (3) of a sensor (2), which sensor (2) determines a physical quantity, which is transmitted by means of a medium, which acts on the diaphragm (3). The protective device (1) can be mounted on the sensor (2). The protective device (1) has a longitudinal axis (Z). The protective device (1), when mounted on the sensor (2), protects the diaphragm (3) from electromagnetic radiation from at least one radiation source (9). The protective device (1) has at least one passage (7), through which passage (7) the medium can reach the diaphragm(3) when the protective device (1) is mounted on the sensor (2) and into which passage (7) the electromagnetic radiation can propagate when the protective device (1) is mounted on the sensor (2). Electromagnetic radiation propagating in the passage (7) reaches the diaphragm (3) only after at least one reflection on a wall of the passage, a passage wall (71) in short.

Description

technical field [0001] The invention relates to a protective device for mounting on a sensor according to the preambles of the independent claims. Background technique [0002] A sensor determines a physical variable and provides a sensor signal corresponding to this physical variable under ideal conditions. For this purpose, sensor elements sensitive to physical variables are arranged in the sensor. The sensing element is usually protected by a protective layer (eg a membrane) of the sensor against certain external influences, such as dust and / or liquids and / or gases and / or electromagnetic radiation. This is expressed and / or understood as a non-exclusive opposite. Membranes are usually made of metal or metal alloys or plastic. The medium is the carrier of physical parameters and acts on the membrane. [0003] The membrane is exposed to external influences. External influences refer to temperature, pressure, and the like. [0004] A physical variable is, for example, p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L19/06
CPCG01L19/069
Inventor C·希尔
Owner KISTLER HLDG AG
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