Device and method for measuring elongation of bolt based on signal relevancy

Abstract

The invention discloses a device and method for measuring elongation of a bolt based on signal relevancy. The device comprises a base. A rail is arranged on the upper surface of the base. A group of jaws with variable distances are arranged on the upper side of the base. Acceleration sensors are arranged on the lower sides of the inner sides of the jaws respectively. A vibration exciter is arranged between the two acceleration sensors. Jaw plates are arranged on the inner sides of the jaws respectively. A through hole is formed in the axis of the base. A rectangular through hole groove is formed in the base. A lead screw is arranged in the through hole and provided with a lead screw nut. The lead screw nut reciprocates in the through hole groove. The lead screw nut is fixedly connected with one jaw. The acceleration sensors and the vibration exciter are all connected with an upper computer. The upper computer is connected with a computer. The errors caused by manual operation of measuring the elongation of the bolt are effectively reduced, the measuring precision is improved, the measuring efficiency is improved, calculation and use in engineering are facilitated, and the pre-tightening force, torque and loading capacity of the measured bolt can be calculated when specific parameters of the bolt are known.

Description

technical field [0001] The invention belongs to the technical field, and in particular relates to a device and a measurement method for determining bolt elongation based on signal correlation. Background technique [0002] At present, the devices for measuring the elongation of bolts are mostly vernier calipers, screw micrometers, dial gauges or similar physical measuring tools. Manual reading usually needs to be estimated at the last digit of the value, which requires the operator to have relevant professional knowledge and practical experience, and generally needs to obtain more than three measurements, and take the average value as the final measurement data. This will inevitably lead to multiple errors in each measurement process, and different operators may obtain different data, which will cause the actual bolt elongation value to be different from the measured bolt elongation value. Values ​​vary. Contents of the invention [0003] In order to solve the above prob...

AI Technical Summary

Problems solved by technology

This will inevitably lead to multiple errors in each measurement process, and different operators may obtain different data, which will cause the actual bolt elongation value to be different from the measured bolt elongation value. Numerical deviation

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