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Sensor pre-tensioning structure based on external pressing mode

A sensor and pre-tensioning technology, which is applied in the direction of supporting machines, mechanical equipment, machine platforms/supports, etc., can solve the problems of limiting the use range of sensors, achieve the effect of simple structure, convenient assembly, and expanded use range

Pending Publication Date: 2019-06-07
GENERAL ENG RES INST CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sensor preloaded by this method is convenient to use when testing the physical quantity between two surfaces, but it cannot be used in the case where a columnar rod such as a bolt needs to pass through the sensor, which limits the scope of use of the sensor

Method used

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  • Sensor pre-tensioning structure based on external pressing mode
  • Sensor pre-tensioning structure based on external pressing mode
  • Sensor pre-tensioning structure based on external pressing mode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1, such as figure 1 and Figure 9 shown;

[0040] The sensor pre-tightening structure based on the external pressure method is used for the measurement that requires a columnar rod to pass through. The sensor pre-tightening structure includes:

[0041] An upper mass block 1 provided with a central through hole;

[0042] A sensor 2 provided with a central through hole;

[0043] The lower mass 3 with a central through hole; the sensor 2 is arranged between the upper mass 1 and the lower mass 3, and the central through hole 9 of the upper mass, the central through hole 5 of the lower mass, and the central through hole on the sensor 2 The holes are aligned; the upper mass block 1 and the lower mass block 3 are connected by a pre-tension mechanism, and the sensor 2 is pre-compressed between the upper mass block 1 and the lower mass block 3 .

[0044] The preloaded sensor 2 of this patent is installed in the middle of the upper connected part 11 and the lower conn...

Embodiment 2

[0046] Example 2, such as figure 1 , figure 2 and image 3 shown;

[0047] The difference between this embodiment and Embodiment 1 is that the pretensioning mechanism includes a plurality of fastening bolts 4, and a plurality of restricted holes 8 are provided on one mass block, and a plurality of threaded holes 10 are provided on the other mass block , the head of the fastening bolt 4 is placed in the limited hole 8, and the stem of the fastening bolt 4 passes through one mass block and is screwed into the threaded hole 10 on the other mass block.

[0048] Through the cooperation between the fastening bolt 4 and the threaded hole 10 in the pretensioning mechanism, the sensor 2 can be pre-tightened between the two mass blocks, and the specific operation is to tighten the fastening bolt 4 to a certain extent.

Embodiment 3

[0050] The difference between this embodiment and Embodiment 2 is that: a plurality of restricted holes are evenly distributed around the central through hole on one mass block; a plurality of threaded holes are evenly distributed around the central through hole on the other mass block.

[0051] The evenly distributed multiple limiting holes and multiple threaded holes can make the force distribution more uniform, avoid structural damage to the mass block or the sensor 2, and can also make the force on the end of the sensor 2 more uniform.

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Abstract

The invention discloses a sensor pre-tensioning structure based on an external pressing mode. The sensor pre-tensioning structure is used for measurement which requests passing of a columnar rod partand comprises a mass block equipped with a center through hole, a sensor equipped with a center through hole and another mass block equipped with a center through hole, wherein the sensor is disposedbetween the two mass blocks and the center through holes in the two mass blocks are aligned with the center through hole in the sensor; and the two mass blocks are connected by a pre-tensioning mechanism, and the sensor is pre-tensioned between the two mass blocks. The pre-tensioning structure disclosed by the invention has the advantages that the structure is simple; assembly is convenient; and the structure is applied to measurement which requests passing of the columnar rod part, so a use scope of the sensor is expanded.

Description

technical field [0001] The invention belongs to the technical field of sensor manufacture and use, and in particular relates to a sensor pre-tightening structure based on an external pressure method. Background technique [0002] In some types of sensors, such as piezoelectric force sensors, due to sensitive components, when the sensor does not apply preload, there is not a linear relationship between the output signal of the sensor and the input physical quantity, often in the initial section of the curve With a certain range of non-linear segments, this will cause the sensitivity coefficient of the sensor to not be a constant, resulting in inaccurate test data or even unusable. In order to solve the above problems, various sensor manufacturers often use a pre-tightening structure for the sensor, apply a pre-tightening force to the sensor, and make the pre-tightening force exceed the nonlinear part, so that the relationship between the output signal and the input physical q...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16M11/04
Inventor 谢若泽孙爱军邓志方陈成军李尚昆高洋周燕良王玉军张方举魏晓贞吕明
Owner GENERAL ENG RES INST CHINA ACAD OF ENG PHYSICS