An experimental device for measuring Young's modulus of metal wire by using a micrometer

By combining a micrometer screw gauge and an autocollimating telescope, the problem of lateral distance measurement error in the traditional optical lever method is solved, achieving high precision in the measurement of Young's modulus of metal wire and simplifying optical path adjustment.

CN224399121UActive Publication Date: 2026-06-23NANJING COLLEGE OF INFORMATION TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
NANJING COLLEGE OF INFORMATION TECH
Filing Date
2025-04-27
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

When measuring the Young's modulus of a metal wire using the traditional optical lever method, the lateral distance between the telescope and the optical lever plane mirror is difficult to measure accurately, leading to increased measurement errors.

Method used

A device combining a micrometer screw gauge and an autocollimating telescope is used to measure the minute elongation of a metal wire using the micrometer screw gauge and to calibrate the tilt of the optical lever reflector using the autocollimating telescope, thus avoiding large lateral distance measurement errors between the observation frame and the measuring frame.

Benefits of technology

It improves the accuracy of Young's modulus measurement of metal wires, reduces errors caused by large spatial distance measurements, and simplifies the optical path adjustment process.

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Abstract

The utility model provides a kind of experimental device for measuring Young's modulus of metal wire by screw micrometer, including measuring frame, light lever device and observation frame;Measuring frame includes measuring support, bearing table, first chuck, second chuck, loading device and screw micrometer;Bearing table is fixedly connected on measuring support, and vertical direction through-hole is provided on bearing table;Screw micrometer is fixed in bearing table end, and the micrometer screw rod area part of bearing table opposite screw micrometer is hollowed out, and the lower end of flat plate is supported by the micrometer screw rod of screw micrometer;Light lever device forefoot is placed on flat plate, and hind leg is placed on the top of second chuck;Observation frame is used to observe the angle change of light lever device.The utility model has the characteristics that compared with conventional experimental instrument, it avoids the error generated by large space distance measurement, and uses autocollimation principle to ensure measurement accuracy, but light path adjustment is simple.
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