Small displacement non-welding shear stress measurement system and method

By using a small-displacement non-welded shear stress measurement system, which utilizes a parallel linkage structure and sensors to measure the shear stress caused by changes in the direction of water flow, the problems of measurement deviation and deformation in existing technologies have been solved, and high-precision shear stress measurement has been achieved.

CN116907715BActive Publication Date: 2026-07-28SICHUAN UNIV
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Patent Information

Application Number
CN202310885358.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-07-19
Publication Date
2026-07-28
Estimated Expiration
2043-07-19

AI Technical Summary

Technical Problem

Existing technologies cannot effectively measure shear stress when the direction of water flow changes, and direct measurement methods suffer from problems such as welding deformation, measurement deviation, and water flow disturbance.

Method used

A small displacement non-welded shear stress measurement system is adopted, including a parallel linkage structure, a probe fixing device and a differential pressure measuring device. The shear stress plate is fixed in a non-welded manner, and the shear stress when the water flow direction changes is measured using displacement sensors and differential pressure sensors.

Benefits of technology

It enables the measurement of shear stress when the water flow direction changes, reduces plate deformation and water flow disturbance, and improves measurement accuracy and structural strength.

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Abstract

The application provides a small displacement non-welding shear stress measurement system and method, which comprises a parallel link structure, two probe fixing devices, an external frame and two differential pressure measurement devices; the parallel link structure comprises a top plate, a first target plate, a second target plate, a first bottom fixed plate and a plurality of circular links, the external frame comprises a structural frame, a hollow plate and two transparent acrylic plates, the probe fixing device comprises a displacement sensor with external threads, a first fixed nut, a second fixed nut and a sleeve with internal and external threads, and the two displacement sensors are used for measuring the first displacement of the first target plate in the first horizontal direction and the second displacement of the second target plate in the second horizontal direction respectively. The application simultaneously monitors the displacement of the parallel link structure in two directions by using two displacement sensors, and realizes shear stress measurement when the water flow direction changes.
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