Small-range three-dimensional sensor and testing method thereof

Abstract

The invention discloses a small-range three-dimensional sensor comprising an elastic body, an upper cover plate, a lower cover plate and a circuit board. The circuit board is arranged in the elastic body; and the upper cover plate and the lower cover plate are fixed to the upper side and the lower side of the elastic body respectively. The elastic body includes a stress table, a wheel rim and foursymmetrically-arranged strain beam sets. The wheel rim sleeves the outside of the stress table. The four symmetrically-arranged strain beam sets are evenly distributed between the stress table and the wheel rim; and one end of each strain beam set is connected with the outer surface of the stress table and the other end of each strain beam set is connected with the inner surface of the wheel rim.The small-range three-dimensional sensor has advantages of simple structure, great easiness in processing, and high measuring precision and the like. In addition, the invention also discloses a testing method of the small-range three-dimensional sensor. According to the testing method, a measurement method of measuring one direction by using a plurality of bridge circuits is employed and measurement values of the bridge circuits are added in software to obtain force values (or voltage values) of the bridge circuits. With the scientific and effective measuring method, a a design method of a small-range sensor or even a micro-range sensor can be provided.

Description

technical field [0001] The invention belongs to the field of sensor measurement, and relates to a small-scale three-dimensional sensor and a testing method thereof. Based on the principle of resistance strain type, the invention is mainly used in a gecko imitation robot kinematics testing system. Background technique [0002] With the rapid development of science and technology, sensors have penetrated into various fields of industrial production. The typical ones in front of us are the robot industry, the grinding industry, various friction and wear testing machines, etc. As far as the sensor principle is concerned, the common ones are resistance Strain gauge principle, photoelectric principle, capacitive principle, electromagnetic principle, etc., one-dimensional sensor, two-dimensional sensor, three-dimensional sensor, six-dimensional sensor, etc. As far as three-dimensional sensors are concerned, there is low measurement accuracy, which is manifested in the large inter-d...

AI Technical Summary

Problems solved by technology

As far as three-dimensional sensors are concerned, there is low measurement accuracy, which is manifested in the large inter-dimensional coupling, which generally reaches 10%, and even reaches 30%. Especially in small-scale three-dimensional sensors, such a large coupling will cause large measurement errors. Difficult to use in industrial production

As far as the gecko-like kinematics test system is concerned, the required range is small, and eccentric loading is required during the test, so the three-dimensional sensor with large coupling cannot be used

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