Micro resistor measurement gripper of damage detection of metal materials and usage method thereof

Abstract

The present invention provides a micro resistor measurement gripper of damage detection of metal materials and a usage method thereof. The micro resistor measurement gripper of damage detection of metal materials comprises: two test piece fixed plates configured to fix metal test pieces, two probes configured to measure resistances of the metal test pieces, two probe fixed plates configured to fix the probes, two screws configured to connect in series the test piece fixed plates with the probe fixed plates, eight nuts (with spacers) configured to fix the test piece fixed plates and the probe fixed plates, and two insulation spacers configured to insulate between the test pieces and the test piece fixed plates. The micro resistor measurement gripper is able to fix probes to the ends of the test pieces to ensure the stability of the measured reading of resistances and detect tiny variations of the resistances of metal test pieces under the action of detection load or environment, so that the accuracy and the precision of measurement may be improved and the variation of the resistances is used for representation of the damaging of the metal materials. Moreover, the micro resistor measurement gripper of damage detection of metal materials and the usage method thereof are applicable to the field of the measurement of micro resistances and resistance variation.

Description

technical field [0001] The invention relates to the technical field of micro-resistance and micro-resistance change measurement, in particular to a resistance measurement jig device that characterizes the damage evolution of metal materials by detecting micro-resistance changes, and introduces the use method of the resistance measurement jig device. Background technique [0002] Metal and its alloy materials are usually used as structural materials, and the components made of them need to bear various complex loads and environmental effects during service, so their mechanical properties are in a process of gradual deterioration. Material damage detection is not only the basis for structural integrity assessment, but also for the design of engineering machinery and structural damage tolerance. Therefore, for the measurement of graded loading damage of metal materials under various simple or complex loads (tension, compression, bending, torsion and their combined loading), esp...

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Problems solved by technology

However, this method of measuring resistance cannot guarantee that the probe is placed at the same position every time, and at the same time, when a person holds the probe, it will always shake or be disturbed by other external factors

The uncertainty of the position of the probe, the vibration of the probe at the measurement part of the test piece and the sliding on the surface of the test piece will lead to the instability of the resistance reading, the accuracy and precision of the resistance measurement are not high, and it is difficult to distinguish the load or the environment A small change in resistance under the action of

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