A young's modulus measuring instrument with capacitive sensing and digital display displacement

Abstract

The invention relates to the field of mechanical physical quantity measurement instruments, and particularly relates to a capacitive grating sensing digital displacement type Young modulus measurement instrument which comprises a capacitive grating sensing ruler, a metal wire fixed frame, a to-be-measured Young modulus metal wire, a traction device and an amplified lever, wherein the capacitive grating sensing ruler consists of a moving grating ruler and a fixed grating ruler, wherein the moving grating rule is arranged on the fixed grating ruler in parallel, a fixed grating fixed guide rail is arranged on the metal wire fixed frame, the moving grating ruler is connected to the lower end of the metal wire through the amplified lever, and the fixed grating ruler is fixed on the fixed grating fixed guide rail through a tightness screw structure. According to the capacitive grating sensing digital displacement type Young modulus measurement instrument, trace elongation of a metal wire can be measured in a high-precision manner, the instrument is simple in structure, low in manufacturing cost and convenient to use.

Description

technical field [0001] The invention relates to the field of measuring instruments for mechanical and physical quantities, in particular to a measuring instrument for Young's modulus with capacitance sensing and digital display displacement. Background technique [0002] Young's modulus is one of the most important and characteristic mechanical physical quantities of elastic materials; the measurement of Young's modulus of wire is not only used in many engineering experiments, but also a relatively popular method in colleges and universities at this stage. Teaching experiments, the existing Young's modulus measuring instruments used in experimental teaching, most of the measuring methods for measuring small displacements are optical lever method distance measuring methods, and the use of the instruments requires the cooperation of two people, and the use of The observation degree of the telescope is complicated to use and takes a long time to measure; in order to solve the a...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is: the optical lever method distance measuring type Young's modulus measuring instrument used in the existing experimental teaching needs two people to cooperate well when using the instrument, and needs to use a telescope to observe the degree. Complicated and time-consuming to measure; and the Young’s modulus method based on capacitive sensing and the metal Young’s modulus measurement method based on photoelectric sensors published in the existing literature have a relatively complex structure of instruments, and the cost of supporting the instruments is relatively high

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