Stress sensor calibration system

Abstract

The invention discloses a stress sensor calibration system, which comprises a stress tester, a stress sensor and a secondary instrument, wherein the stress tester comprises a base, a lever bracket, a lever, a weight loading mechanism, an upper clamp and a lower clamp. The stress tester of the stress sensor calibration system applies a force by using a weight and provides a standard reference value of the stress by weight magnitude conversion; loading, unloading and loading protection of the stress tester are realized by adjusting the weight, and the stress of a tested piece is constant once the weight is determined, so the force value measurement precision is high; meanwhile, the lever pivot of the stress tester is a bearing and has strong bearing capacity, the upper clamp is hinged with the lever, and the lower clamp is hinged with the base, so that the pull and the pressure of the tested piece are on the same straight line, and the accuracy of the measured force value can be furtherensured; therefore, the stress sensor calibration system can accurately calibrate the output value of a sensor, and has high calibration precision.

Description

technical field [0001] The invention relates to a sensor calibration system, in particular to a stress sensor calibration system. Background technique [0002] The stress sensor is used to detect the stress value of the material, and its measurement accuracy has a lot to do with the stress value calibration system of the stress sensor. Existing material force measuring machines for stress sensors mainly include motor, hydraulic, pneumatic, electromagnetic, etc. according to the type of output source. At present, the material force measuring machines on the market are mainly hydraulic material testing machines, which mainly have the following problems: 1. The accuracy is low. In fact, it is maintained at this tension value and fluctuates around, and it cannot be precisely maintained at this tension value; 2. There is a return error, and it is difficult to keep the tension value consistent during loading and unloading, that is, when loading and unloading The same tensile val...

AI Technical Summary

Problems solved by technology

At present, the material force measuring machines on the market are mainly hydraulic material testing machines, which mainly have the following problems: 1. The accuracy is low. In fact, it is maintained at this tension value and fluctuates around, and it cannot be precisely maintained at this tension value; 2. There is a return error, and it is difficult to keep the tension value consistent during loading and unloading, that is, when loading and unloading The same tensile value displayed, but the actual tensile force borne by the sample is not the same tensile value; 3. There is electromagnetic interference. When the hydraulic material testing machine is working, its brush will cause a certain degree of electromagnetic interference, which will affect some new technologies. (such as magnetic cable force measurement method) research

The above reasons cause a large difference between the force value measured by the dynamometer and the actual stress value of the material, so there is a large error when calibrating the output value of the sensor, which reduces the measurement accuracy of the sensor

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