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Long stroke linear displacement non-contact measuring device

A linear displacement, non-contact technology, applied in the direction of measuring devices, electrical devices, instruments, etc., can solve the problems of rising cost of permanent magnet materials, increasing costs, increasing the installation size of permanent magnets, etc., to overcome short measuring strokes, The effect of expanding the application range and reducing the cost of raw materials and installation space

Inactive Publication Date: 2012-07-04
HAMLIN ELECTRONIC (SUZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to overcome the defects of linearity, it is often necessary to increase the length of the permanent magnet, but this method not only increases the installation size of the permanent magnet, but also increases the cost of the entire product due to the rapid increase in the cost of permanent magnet materials

Method used

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  • Long stroke linear displacement non-contact measuring device
  • Long stroke linear displacement non-contact measuring device
  • Long stroke linear displacement non-contact measuring device

Examples

Experimental program
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Effect test

Embodiment

[0021] A long-stroke linear displacement non-contact measuring device of this embodiment, such as Figure 1 to Figure 5 The shown is used to measure the linear displacement of the permanent magnet 1, including a micro control unit (MCU) 2, and also includes two linear Hall sensors IC1 31 and IC2 32, IC1 31 and IC2 32 are arranged side by side along the same axis direction, and are connected to the permanent magnet. The linear displacement axis X of the magnet 1 is parallel; IC1 31 and IC2 32 are respectively provided with voltage output terminals, and each voltage output terminal is connected to the input terminal of the micro control unit 2 respectively. The distance between IC1 31 and IC2 32 is set at most so that the displacement position of permanent magnet 1 corresponding to the end of IC1 31 linear segment B11 in the output voltage-displacement curves of IC1 31 and IC2 32 is corresponding to the beginning of IC2 32 linear segment B21 The displacement position of the perm...

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PUM

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Abstract

The invention discloses a long stroke linear displacement non-contact measuring device, which is used for measuring linear displacement of a permanent magnet, and comprises a micro-control unit, and further comprises at least two linear hall sensors, wherein the linear hall sensors are arranged in parallel along the same axial direction, and are parallel to a linear displacement axial line of the permanent magnet, each linear hall sensor comprises a voltage output end, and the voltage output ends are respectively connected with the input end of the micro-control unit. The long stroke linear displacement non-contact measuring device is added with a plurality of linear hall sensors, achieves accurate measuring of long stroke linear displacement, enlarges application range, overcomes the defects that the measuring stroke is short when using single linear hall sensor and the linear degree is low when measuring long stroke, simultaneously, does not need to increase length of the permanent magnet, and reduces cost of raw materials and mounting space of the permanent magnet.

Description

technical field [0001] The invention relates to the field of linear displacement measurement, in particular to a long-stroke linear displacement non-contact measurement device based on the Hall effect. Background technique [0002] The voltage output of the linear Hall IC (Hall IC) precisely tracks changes in magnetic flux density. In the static state (no magnetic field), the output voltage is generally set equal to half of the power supply voltage within the operating voltage and operating temperature range. When increasing the south pole magnetic field, the output voltage will increase or decrease; on the contrary, when increasing the north magnetic field, it will decrease or decrease. Increase the output voltage, so it is often used to measure current, angle, linear displacement and magnetic flux, etc., and reflect mechanical events in a magnetically driven manner. At present, ICs for measuring linear displacement are mainly used to measure linear displacement with a sma...

Claims

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Application Information

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IPC IPC(8): G01B7/02
Inventor 戴德明
Owner HAMLIN ELECTRONIC (SUZHOU) CO LTD
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