High-precision multi-range novel force sensor set of series structure

Abstract

The invention belongs to the technical field of material mechanical test measurement, and provides a high-precision multi-range novel force sensor set of the series structure. The force sensor set iscomposed of a base, an upper cover, a loading rod, a high-range force sensor, a high-linearity spring, a force transmission shaft, and a low-range force sensor. The series structure composed of a small-range force sensor and a large-range force sensor is introduced, and the readings of the small-range and large-range force sensors can be read at the same time for different measurement accuracies.The high-linearity quality spring can not only pre-tighten and balance the initial force, but also limit and protect the low-range force sensor, and under the condition of increasing seal structure protection, the sensor set can be placed in a pressure chamber for underwater measurement, and the friction force influence of the loading rod can be avoided. The high-precision multi-range novel forcesensor set of the series structure is compact, reasonable and reliable in structure, high in structural stability, overload-protecting, airtight and waterproof, convenient to use, and low in cost. Therange of the sensor can be combined according to actual requirements and the sensor set can be applied to different material testing machines and stressing measuring structures.

Description

technical field [0001] The invention belongs to the technical field of material mechanics test and measurement, and relates to a novel force sensor group with high-precision and multi-range series structure. Background technique [0002] The force (weighing) sensor is an indispensable measurement unit in the material mechanics test. A single force sensor has different measurement accuracy in experiments with different force ranges, generally 0.1% of the maximum range. Therefore, the measurement accuracy of a large-range force (weighing) sensor is relatively lower than that of a small force. The measurement accuracy of the force (weighing) sensor is mainly affected by indicators such as nonlinearity, hysteresis, and repeatability, and the nonlinear index has a large error, which is often the main parameter affecting the overall accuracy of the force sensor. The linearity error is related to the range of the force (weighing) sensor. Under the same linearity, the accuracy of t...

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Problems solved by technology

[0005] The invention aims at the contradictory problems of low measurement accuracy of large-range sensor force in material testing and other loading structures, and the inability to measure large loads in a small range. The invention provides a new force sensor with high-precision multi-range series structure protected by springs and mechanical structures sensor group

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