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Measuring sensor for simultaneously measuring force that can be both dynamic and static

A measurement sensor, static technology, used in the field of measurement sensors

Active Publication Date: 2019-07-19
KISTLER HLDG AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since leakage currents are always present in practice, only dynamic force measurements with varying frequencies in the range of a few Hz to several MHz are possible with the direct piezoelectric effect, and only quasi-static force measurements with a duration of several minutes are possible

Method used

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  • Measuring sensor for simultaneously measuring force that can be both dynamic and static
  • Measuring sensor for simultaneously measuring force that can be both dynamic and static
  • Measuring sensor for simultaneously measuring force that can be both dynamic and static

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Embodiment Construction

[0031] The measuring sensor 1 is configured for the simultaneous measurement of a force F, which can be both dynamic and static. The dynamic force F changes in a very short time, and the frequency of the change is in the range of several Hz to several MHz. The static force F does not change over long periods of time, hours, weeks and years, and the frequency of change is in the mHz to nHz range. Whether the force F to be detected is dynamic or static depends only on its frequency of change. Knowing the invention, a skilled person can also provide measuring sensors for simultaneous measurement of dynamic pressure and static pressure. The technician can also set up measuring sensors for measuring acceleration.

[0032] The measuring sensor 1 has a longitudinal axis AA', a transverse axis BB' and an oblique axis CC'. These axes are inclined to each other, preferably perpendicular to each other. In the sense of the present invention, the term inclination means that these axes ...

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Abstract

The invention relates to a measuring sensor (1) for simultaneously measuring a force (F) that can be both dynamic and static, comprising: at least one piezoelectric sensing element (10, 10'), whereinthe force (F) on element surfaces of the piezoelectric sensing element (10, 10') produces electrical polarization charges, a magnitude of the produced electrical polarization charges being proportional to a magnitude of the force (F); a resonator element (20), which can be excited at at least one resonance frequency (f); wherein the force (F) acts on the piezoelectric sensing element (10, 10') andon the resonator element (20) in a force direction; wherein the force (F) causes a transverse elongation (Q) in the resonator element (20), which transverse elongation (Q) occurs in the resonator element (20) in a transverse direction, which forms an angle different from zero with the force direction, a magnitude of the transverse elongation (Q) being proportional to the magnitude of the force (F); and wherein the transverse elongation produces a frequency change (Delta f) of the resonance frequency (f), which frequency change is a function of the force (F).

Description

technical field [0001] The invention relates to a measuring sensor according to the preambles of the independent claims for the simultaneous measurement of forces, which can be both dynamic and static. Background technique [0002] Patent document EP0065511A1 shows a measuring sensor for measuring dynamic forces, which has a piezoelectric sensor element. The piezoelectric sensor element has a plurality of disk-shaped plates made of piezoelectric material, the disk-shaped diameter of which is significantly greater than the thickness of the plates. For force measurement, the direct piezoelectric effect in the form of longitudinal effect is used. The piezoelectric material is spatially oriented with respect to the force such that the force acts orthogonally on the disk-shaped surface of the plate and generates an electric polarization charge on the disk-shaped surface. The electric polarization charges are picked up by the electrodes and fed to the evaluation unit as a charge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L5/16G01L1/16H01L41/113H01L41/083
CPCG01L5/167G01L1/162H10N30/505H10N30/302G01L1/165
Inventor 克劳迪奥·卡瓦洛尼K·普夫鲁格
Owner KISTLER HLDG AG
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