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Novel inductive strain rosette

An inductive, strain rose technology, applied in the direction of electric/magnetic solid deformation measurement, electromagnetic measurement device, etc., can solve the problems of complex measurement circuit, small output of strain gage, and large influence of temperature change, and achieve the expansion of frequency response range, signal The effect of strong output and long service life

Inactive Publication Date: 2011-05-18
HUAIHAI INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This kind of strain gauge has small output, average sensitivity, great influence of temperature change, complex measurement circuit, poor anti-interference ability, not suitable for working in harsh environments, and bonding quality has a great influence on measurement accuracy.

Method used

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Embodiment Construction

[0012] A new type of inductive rosette, using F with a thickness of 0.01-0.035mm e - Ni-based amorphous alloy flakes, cut into three arm bands 1 connected at the top, the angle between the three arm bands is 45°, cutting a "gate"-shaped breach on each arm band, and vertical It is folded to form a "gate"-shaped magnetic pole 2, and the measurement winding of the excitation winding is wound on each magnetic pole. The "gate"-shaped magnetic pole and the arm band body form a closed magnetic circuit. The arm band is rectangular, 20-30mm long, 10-18mm wide, and the height of the "gate" type magnetic pole is 5-8mm.

[0013] 1. Working principle

[0014] The inductive rosette of the present invention is based on the Villira effect of ferromagnetic materials. When in use, the strain rosette is welded on the surface of the workpiece to be measured for strain. When the principal strain direction is unknown, the rosette is welded in any direction, and the excitation coils on each armba...

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Abstract

A novel inductive strain rosette adopts a Fe-Ni base amorphous state alloy sheet which is tailored to form three arm bands, the top ends of which are connected; the angle among the three arm bands is 45 degrees; every arm band is tailored with a gate type breach which is folded vertically to form a gate-type magnetic pole; every magnetic pole is wound with a measuring winding of an exciting winding; the gate-type magnetic pole and the arm band body form a closed magnetic circuit. Based on the Vieira effect of ferromagnetic materials, the arm band body is welded on the surface of a work piece,the strain of which is measured; the arm bands and the work piece to be measured are simultaneously deformed, thus causing the magnetic conductivity in the magnetic circuit of the arm bands to changeand leading the inductance value to change. The transformation of the magnetic resistance in the magnetic circuit causes the magnetic flow to change, thus generating the induction in the measuring winding corresponding to the variation of stresses. By carrying out calibration experiment on the inductive strain rosette and according to the real measuring voltage, the strain is figured out. The inductive strain rosette has strong signal output and high sensitivity, can adopt higher excitation frequency and has long service life.

Description

technical field [0001] The invention relates to a measuring device for workpiece strain, in particular to a novel inductive strain rosette. Background technique [0002] Rosette is a strain sensor with two or more different axial sensitive grids or measuring axes, which is used to determine the magnitude and direction of the principal strain in the plane stress field. Traditional rosettes are resistance strain gauges whose sensitive grids are made of wire or foil. This kind of strain gauge has small output, average sensitivity, great influence of temperature change, complex measurement circuit, poor anti-interference ability, and is not suitable for working in harsh environments. The bonding quality has a great influence on measurement accuracy. Contents of the invention [0003] The technical problem to be solved by the present invention is to propose a new inductive rosette with strong signal output and high sensitivity in view of the deficiencies of the prior art. [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B7/24
Inventor 石延平
Owner HUAIHAI INST OF TECH
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