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Attached type force-measuring sensor

A load cell and attachment technology, which is applied in the field of force sensors, can solve the problems that components cannot be installed with conventional sensors to test, the test error is large, and the on-site test of component load is complicated, etc., and it can achieve a wide range of tests, simple and convenient on-site installation, and reduce The effect of field work

Inactive Publication Date: 2011-03-30
SHANGHAI INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, the load-bearing test of components needs to be carried out on site, and work such as grinding, cleaning, strain gauges, and bridge assembly must be carried out on the stressed components. The load-bearing on-site test of components is very complicated, and many components cannot be tested with conventional sensors.
The test error caused by the on-site strain gauge is large. In addition, the error caused by the analog calibration and similar conversion

Method used

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0027] The invention utilizes the principle of simultaneous deformation of attachment to convert the force deformation of the component under test into the deformation of the sensor, thereby indirectly testing the force condition of the component. works like figure 1 , as shown in 2: According to the principle of mechanics, it can be known that the component deforms under the action of P force, and the deformation amount is ΔL. Its value is:

[0028] ΔL=(P×L) / (E×F)

[0029] ΔL——deformation under force

[0030] P - force

[0031] L - the original length of a certain part of the member

[0032] E - modulus of elasticity of the component material

[0033] F——The section of the member bearing P load

[0034] Since the sensor deforms synchronously with the member, the amount of deformation of the sensor is consistent with that of the member. Namely: ...

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Abstract

The invention relates to an attached type force-measuring sensor, comprising an elastomer main beam. The two ends of the elastomer main beam are provided with a left mounting end and a right mounting end, and the middle part thereof is provided with a structural hole; the middle part of the structural hole is provided with a strain beam; the elastomer main beam, the left mounting end and the right mounting end and the strain beam have respectively rectangular structures with symmetrical axis; the middle parts of the left mounting end and the right mounting end are respectively provided with afirst mounting hole and a second mounting hole; the structural hole, the strain beam, a first mounting hole and the second mounting hole are positioned on the same axis; the upper surface and the lower surface of the strain beam are respectively stuck with resistance strain sheets. The attached type force-measuring sensor utilizes the principle of attached synchronous deformation to switch the stress deformation of members to be measured into deformation of sensors, thus measuring the stress condition of the members indirectly and solving the technical difficulty that many members can not be measured due to incapability of being mounted with the conventional sensor. The sensor is calibrated only by adding standard load on the sensor elastomer and correspondingly obtaining the output valuethereof, thus leading the measuring precision to be improved. The attached type force-measuring sensor improves the errors caused by the original simulating calibration and similarity transformation.

Description

technical field [0001] The invention relates to a force measuring sensor, in particular to a force measuring sensor which uses the principle of synchronous deformation of attachment to convert the force deformation of the component under test into the deformation of the sensor, thereby indirectly testing the force of the component. Background technique [0002] At present, the load-bearing test of components needs to be carried out on-site. Work such as grinding, cleaning, strain gauges, and bridge assembly must be carried out on the stressed components. The load-bearing on-site test of components is very complicated, and many components cannot be tested with conventional sensors. The test error caused by the on-site strain gauge is large. In addition, the error caused by the simulation calibration and similar conversion. Contents of the invention [0003] The present invention is to provide an attached load cell, which can test the tension, pressure and bending force by s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/20
Inventor 胡飒英石钢夏荫陪金泽敏沈旭栋陈欣晶
Owner SHANGHAI INST OF TECH
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