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Rotating shaft dynamic and static torque measuring system and method

A torque measurement, dynamic and static technology, applied in the field of shaft dynamic and static torque measurement system, can solve the problems of low measurement accuracy and precision, cumbersome size customization and installation, and poor environmental adaptability, so as to simplify the installation and debugging steps and solve the signal problem. Missing, the effect of improving measurement accuracy

Active Publication Date: 2021-06-22
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a dynamic and static torque measurement system and method of a rotating shaft to solve the shortcomings of traditional torque measurement methods such as low measurement accuracy and precision, poor environmental adaptability, size customization and cumbersome installation

Method used

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  • Rotating shaft dynamic and static torque measuring system and method
  • Rotating shaft dynamic and static torque measuring system and method
  • Rotating shaft dynamic and static torque measuring system and method

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Experimental program
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Embodiment approach

[0041] As a specific implementation manner, the magnetic grid a 20 and the magnetic grid b 21 include, but are not limited to, magnetic phase detectors such as flexible magnetic grid strips, magnetic tiles, magnetic rings, etc. that may produce seams after installation. The types of the magnetic read head a 201 and the magnetic read head b 211 include, but are not limited to, magnetoelectric sensors such as fluxgate sensors, Hall sensors, and magnetoresistive sensors. For example, in some embodiments, the magnetic grating a 20 and the magnetic grating b 21 are soft rubber magnetic strips which are composed of magnetic powder such as ferrite and rubber, and a protective steel strip can also be attached. The width of the protective steel strip is 8 mm, and the magnetic The thickness of the grid is 1.5mm, the grid pitch of the magnetic grid is 2mm, the sensitive elements in the magnetic read head a 201 and the magnetic read head b 211 are TMR chips, and IC-MSA chips are used to en...

Embodiment

[0060] In order to verify the accuracy of the scheme of the present invention, the following experimental design was carried out.

[0061] The distance L between the magnetic grid a 20 and the magnetic grid b 21 is 1m, the specifications of the magnetic grid a 20 and the magnetic grid b 21 are the same, and the total number of magnetic grid grids N around the rotating shaft 1 to be measured is 1000. The phase difference change Δθ is π, then the current torque T of the rotating shaft 1 to be measured is:

[0062]

[0063] Using equally spaced torque loading, we get Figure 5 The experimental results of the actual measured torque shown in the figure, the R-square value of the fitted straight line is 0.99845, which proves that the dynamic and static torque measurement system and method of this set of rotating shafts have excellent measurement accuracy and linearity.

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Abstract

The invention discloses a rotating shaft dynamic and static torque measurement system and method. The device comprises a magnetic grid a, a magnetic grid b, a magnetic read head a, a magnetic read head b, a signal acquisition unit and a torque calculation unit. The magnetic grids a and b are respectively installed at two ends of the rotating shaft in a surrounding mode to form a circular ring coaxial with the rotating shaft and generate joints a and b. The magnetic read heads a and b are respectively installed above the magnetic grid bars a and b, the installation air gap distance is adjusted, and the influence of the seams a and b on the measurement result is eliminated. The magnetic grids a and b rotate along with the rotating shaft, and the magnetic read heads a and b induce the change of a magnetic field to generate two groups of four-way sine-like voltage signals sina, sinb, cosa and cosb. And the signal acquisition unit simultaneously performs high-frequency voltage sampling on the four paths of signals, and the torque calculation unit calculates the torque of the rotating shaft by adopting an arcsine method. According to the invention, dynamic and static torque measurement in a full torque range can be carried out on any rotating shaft without considering the influence of a magnetic grid seam, the installation is convenient, and the torque measurement precision is high.

Description

technical field [0001] The invention relates to torque measurement of a rotating shaft, in particular to a system and method for measuring the dynamic and static torque of a rotating shaft. Background technique [0002] The rotating shaft is an important part in the mechanical transmission system, and the real-time, stable and accurate monitoring of the rotating shaft torque can provide a strong guarantee for the fault alarm, diagnosis and maintenance and operation reliability of the mechanical transmission system. [0003] According to the different measurement principles, the current torque measurement technology can be divided into three categories: balance force method, energy conversion method and transfer method. Among them, the balance force method is only suitable for measuring the torque under static or uniform motion due to the limitation of its own measurement mechanism, while the energy conversion method has poor measurement accuracy due to too many indirect fact...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L3/10
CPCG01L3/104
Inventor 冯延晖黄光远邱颖宁
Owner NANJING UNIV OF SCI & TECH