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Magnetostrictive tactile sensor array for curvature measurement

A technology of tactile sensors and sensor arrays, applied in the direction of electric/magnetic contour/curvature measurement, electromagnetic measurement devices, etc., can solve the problems of temperature cross-sensitivity, small measurement range, etc., achieve accurate measurement, improve measurement accuracy, and increase measurement range. Effect

Inactive Publication Date: 2021-06-18
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to design a new type of magnetostrictive tactile sensor array for the problems of small measurement range and temperature cross-sensitivity of existing object curvature measurement devices

Method used

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  • Magnetostrictive tactile sensor array for curvature measurement
  • Magnetostrictive tactile sensor array for curvature measurement
  • Magnetostrictive tactile sensor array for curvature measurement

Examples

Experimental program
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Effect test

Embodiment 1

[0058] Embodiment 1: The relationship between the deflection and the output voltage of FeGa wire with an effective length of 19 mm and a diameter of 0.8 mm in the range of 0-4 mm. The main purpose of this embodiment is to study the input-output relationship of the sensing unit.

[0059] Construction of the experimental platform: fix the installed sensor on the experimental platform, use the DC stabilized power supply as the power supply, use the slide rail to drive the inclined surface with a slope angle of 45° as the deflection applying device, and press the transmission contact through the inclined surface, which is the sensing unit The deflection signal is provided, and the output voltage signal of the Hall element is collected by the DH-8303 data acquisition card and sent to the computer for display.

[0060] The software or protocols involved in the present invention are all known technologies.

[0061]Experimental process and results: Connect the S1-S5 output ports of t...

Embodiment 2

[0062] Embodiment 2: Manipulator integrated with the present invention on the manipulation surface respectively presses five cylinders with known curvatures to test the detection accuracy of the sensor array. The experimental platform is composed of three-finger manipulator (RightHand Robotics), DC regulated power supply, data acquisition card and PC computer. During the experiment, the circuit board output terminals S1-S5 of the sensor array were connected to the data acquisition card, and the acquisition card input the collected voltage signal into the computer, and the curvature of the object was calculated by the computer. The DC regulated power supply is connected to the VCC and GND ports of the sensor circuit board to provide it with a stable voltage.

[0063] The relationship curve between the actual object curvature and the measured curvature is as follows: Figure 10 shown. Experimental results show that the measurement error is within 6%. It is proved that the mag...

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Abstract

The invention relates to a magnetostrictive tactile sensor array for curvature measurement. A main body part of the sensor array comprises a sensor array base and five sensing units embedded in the sensor array base; each sensing unit comprises a Hall placement wall, a shell, a transmission contact, a FeGa wire, a permanent magnet, a Hall element and a spring; after the Hall placement wall is embedded into the end part of a groove, a rectangular groove with a flush bottom is formed, and the rectangular groove is embedded into the shell; and the tail end of the FeGa wire is fixed on the Hall placement wall of the sensing unit and is in contact with the Hall element, the head end of the FeGa wire is embedded into the transmission contact, and the transmission contact extends out of the shell. The maximum measurement error is 6% within the curvature range of 10-20 m<-1>, and the sensor is hardly influenced by temperature and can accurately measure the curvature of an object.

Description

technical field [0001] The present invention applies the magnetostrictive tactile sensor based on FeGa alloy material to the field of curvature measurement of objects, and mainly relates to a tactile sensor array using magnetostrictive FeGa wire as a sensitive element, through direct contact with the measured object, to realize the Accurate measurement of object curvature. Background technique [0002] The curvature of an object is a very important parameter, but there are not many sensors that measure the curvature of an object. At present, the industry mainly uses strain gauges and optical fiber sensors to measure the curvature of objects. The strain gauge has a simple structure, but it cannot measure large curvatures, and when the thickness of the object structure is thin, the measurement will be more difficult; the optical fiber sensor has high sensitivity, but the production is complicated and expensive, and it is difficult to repair once damaged, and there is temperat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/28
CPCG01B7/28
Inventor 张原野翁玲高绍阳程天宇赵轩王博文
Owner HEBEI UNIV OF TECH