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Non-contact readout type displacement transducer for digital magnetic stripe and grating strip

A technology of displacement sensor and grating strip, which is applied in the field of displacement sensor, can solve the problems of large structural limitations, analog to digital conversion errors, and low resolution, and achieve the effects of fast information transmission, simple structure, and high measurement accuracy

Inactive Publication Date: 2006-04-05
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Contrary to the previous situation, the output voltage is reversed. The disadvantage of the traditional displacement sensor is that the resolution of the small displacement measurement is not high, and the contradiction between the measurement accuracy and the measurement range is not easy to solve. Environmental and electromagnetic field interference, there are errors in the digital conversion of analog quantities

Method used

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  • Non-contact readout type displacement transducer for digital magnetic stripe and grating strip
  • Non-contact readout type displacement transducer for digital magnetic stripe and grating strip
  • Non-contact readout type displacement transducer for digital magnetic stripe and grating strip

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: as Figure 4 , Figure 5 Shown, non-contact digital magnetic strip (head) readout displacement sensor. The length data is written on the magnetic strip 1, and the writing of the length data number is a data magnetic recording signal, and the length data is arranged into a length data channel along a straight line, and the length data channel is the length data magnetic channel 2, and the length data reading component is a magnetic head 3. The magnetic head 3 is fixed on the displacement rod 4 by the connecting rod 11. During the displacement, the magnetic head 3 of the length data reading component is displaced along the length data magnetic channel 2, and the pre-written length data is read out corresponding to the displacement.

[0028] The working principle is to pre-write the length data magnetic channel 2 on the magnetic strip 1, the magnetic head 3 is fixed on the displacement rod or the sliding rod 4, and the linear displacement of the displacement...

Embodiment 2

[0030] Embodiment 2: as Image 6 , Figure 7 Shown, non-contact digital transmissive grating (laser emitter, receiver) readout displacement sensor. The length data is written on the grating strip 5, and the length data number is written as a binary number, and the length data is arranged into a length data channel along a straight line, and the length data channel is the length data grating channel 6, and the length data reading component is a laser transmitter 7 and the laser receiver 8, the laser transmitter 7 and the laser receiver 8 are fixed on the displacement rod 4 by the connecting rod 11, the laser transmitter 7 and the laser receiver 8 are respectively located on both sides of the grating bar 5, and the length data is read during the displacement. Take the displacement of the component laser emitter 7 and laser receiver 8 along the length data grating channel 6, and read out the pre-written length data corresponding to the displacement.

[0031] The working princip...

Embodiment 3

[0032] Embodiment 3: as Figure 8 , Figure 9 Shown, non-contact reflective grating (laser emitter, receiver) readout displacement sensor. Length data is written on the grating strip 5, and the length data is arranged into a length data channel along a straight line, the length data channel is the length data grating channel 6, and the length data reading components are a laser transmitter 7 and a laser receiver 8, and the laser transmitter 7 and the laser receiver 8 are fixed on the displacement rod 4 by the connecting rod 11, the laser transmitter 7 and the laser receiver 8 are respectively located on the same side of the grating bar 5, and the length data reading components of the laser transmitter 7 and the laser receiver The device 8 is displaced along the length data grating channel 6, and the other side of the grating bar 5 opposite to the laser emitter 7 and the laser receiver 8 is provided with a light reflection plate 9, and the pre-written length data is read out c...

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Abstract

The present invention, non-contact digital magnetic bar or grating bar read-out displacement sensor, features that the magnetic bar or grating bar has written length data in linear direction to constitute length data channel, the length data reading device is fixed onto displacing rod, and the length data reading device displaces along the length data channel to read out the pre-written length data or corresponding displacement. The present invention has simple structure and high measurement precision, and the grating bar is not affected by electromagnetic field and other physical environment factor and produces no environmental pollution.

Description

technical field [0001] The invention belongs to the field of optomechanical-electrical integrated digital testing instruments, and in particular relates to a displacement sensor. Background technique [0002] Displacement sensors have a wide range of applications, and traditional displacement sensors often use rheostat or inductance principles. like figure 1 As shown, the rheostat displacement sensor uses a sliding wire rheostat as the basic component. The slider changes its position under the action of the measured non-electric quantity (line displacement), causing the resistance of the rheostat to change, so that the current in the measurement circuit changes accordingly. , the displacement to be measured is converted into electricity. The sliding contact of the slider causes the resistance of the measuring circuit to vary continuously, corresponding to the displacement of the slider to be measured. At the same time, due to contact wear and dust, etc., the contact resis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/02G01D5/12
Inventor 何力生陈三昧金力人何子燚金德先
Owner WUHAN UNIV OF TECH