Method and device for measuring small elongation of solid material by using levers and Hall integrator

Abstract

The invention relates to a method and a device for measuring the small elongation of a solid material by using levers and a Hall integrator, and belongs to experimental apparatuses. A short arm of a second-stage lever is overlapped at the top end of a long arm of a first-stage lever; the Hall integrator is arranged at the lower end of a long arm of the second-stage lever and also on the axis of a coil; the Hall integrator and the coil are respectively connected with a control circuit. The first-stage lever is pushed by the small displacement of a to-be-measured object, the first-stage lever pushes the second-stage lever to generate larger displacement, the second-stage lever drives the Hall integrator to move on the axis of the coil, so that the Hall integrator generates larger displacement in a magnetic field, the reading value of a milli-teslameter is changed accordingly, the reading value is in one-to-one corresponding with the position of the Hall integrator, and through the change of the reading value, the small displacement of the to-be-measured object can be figured out. The measuring process is free from man-made interference, data are objective and unique, the structure is compact, simple and visual, the occupied space is small, the maintenance cost and the use cost are low, and the popularization in national universities is easy.

Description

Technical field: [0001] The invention relates to a method and a device for measuring the tiny elongation of solid materials by using a lever and a Hall integrator, belonging to experimental instruments. technical background: [0002] The optical lever amplification method is currently widely used in the two important physical experiments of "Measurement of Young's Modulus of Metal Wire" and "Determination of Linear Expansion Coefficient of Solid". The small elongation amount, but the existing optical lever system needs to occupy a large space, and the knowledge used is relatively simple. In addition, the relevant data is read by the naked eye, which is not objective and unique enough; experimenters often interfere with the optical observation system during the observation process. [0003] The integration and digitization of experimental instruments, the cultivation of students' ability to comprehensively use knowledge, the reduction of space occupation, the avoidance of hu...

AI Technical Summary

Problems solved by technology

At present, there is no instrument and method that combines the Hall effect and the lever amplification method to measure the small elongation in the one-dimensional direction.

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