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Strain gauge

A technology of strain gauges and strain gauges, which is applied in the field of strain gauges, can solve problems such as different test tasks, unsatisfactory strain gauges, and insufficient convenience and speed, so as to avoid difficulties in networking, achieve breakthroughs in stability and field adaptability, and improve measurement The effect of accuracy

Pending Publication Date: 2017-08-08
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Abstract
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Problems solved by technology

[0003] However, the existing strain gauges are pre-configured with a measuring bridge, the measuring bridge is fixed, the number of measuring points is small, and generally requires online work, which is not enough for some structural deformations that need to be measured on-site in urban underground projects. Convenient
And considering the actual needs of the engineering site, it is often necessary to have multiple measurement points working at the same time, and the test tasks are different. The existing strain gauges cannot meet the needs of actual engineering measurement.

Method used

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Embodiment Construction

[0029] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and operation instructions. The following operating instructions are only used to illustrate the upgrade and improvement of the present invention more clearly, but not to limit the application scope of the present invention.

[0030] The invention provides a portable multifunctional strain gauge, which is especially suitable for stress and strain measurement of structural deformation in the direction of urban underground space engineering, and is also suitable for the needs of scientific research and teaching in colleges and universities.

[0031] An embodiment of the invention provides a strain gauge. see figure 1 , the strain gauge 10 is provided with a plurality of measuring points 101, and each measuring point 101 has a port connected to an external sensor (such as figure 1 Port A to port D) an...

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Abstract

The invention discloses a strain gauge provided with a plurality of measuring points each of which has a port connected with an external sensor and a measuring point circuit. The strain gauge is further provided therein with a plurality of resistors corresponding to respective measuring points. One or more resistors can be connected to or disconnected from the measuring point circuit of the corresponding measuring point. During measurement, the insertion end of the external sensor is inserted into the corresponding port of the measuring point, and switches on or off the corresponding resistor in the measuring point circuit. The measuring points form a circuit of a predetermined type of bridge.

Description

technical field [0001] The invention relates to an instrument for measuring variation, in particular to a strain gauge. Background technique [0002] The resistance strain gauge is a widely used high-precision mechanical quantity sensing element. Its basic task is to convert the deformation of the component surface into the change of its own resistance value, and then be measured by the resistance strain gauge. The static strain gauge is a testing instrument designed to test the deformation of the strain gauge to monitor the deformation of the engineering structure. The existing static strain gauges on the market collect signals through sensors, and get the circuit signals of the deformation amount from the measuring bridge, and display them on the computer. [0003] However, the existing strain gauges are pre-configured with a measuring bridge, the measuring bridge is fixed, the number of measuring points is small, and generally requires online work, which is not enough fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/16
CPCG01B7/18
Inventor 李涛王义鑫刘国坤刘千
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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