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Non-contact hole diameter measuring device

A non-contact, measuring device technology, applied in the direction of measuring devices, optical devices, instruments, etc., can solve the problems of reduced measurement efficiency and increased measurement cost, and achieve the effects of improved efficiency, simple structure, and low measurement cost

Active Publication Date: 2014-10-29
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Capacitive sensors have the advantages of high precision and good dynamic characteristics in the measurement of tiny apertures. However, their probes are limited to measuring a certain fixed aperture, that is, different specifications of sensor probes are required to measure different apertures, which leads to a decrease in measurement efficiency. Increased cost of measurement

Method used

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Embodiment Construction

[0014] Such as figure 1 with 2 As shown, the non-contact aperture measuring device includes an adjusting motor 1, a connecting rod 2, a scale grating 3, an indicating grating 4, a screw nut 5, an electrode plate 6, a push rod 7, a ball screw 8 and an electrode plate bushing 9 . The ball screw 8 is fixed to the output shaft of the adjusting motor 1, the scale grating 3 is fixedly set on the ball screw 8; the screw nut 5 is connected to the ball screw 8, the indicator grating 4 is fixed to the screw nut 5, and set Outside the scale grating 3; one end of the four connecting rods 2 is hinged with the motor seat of the adjusting motor 1, and the other end is respectively hinged with a push rod 7; one end of the four push rods 7 is hinged with the screw nut 5, and the other One end is respectively fixed with an electrode plate lining seat 9; four electrode plate lining seats 9 are evenly distributed along the circumference, and an electrode plate 6 is respectively fixed on the sam...

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Abstract

The invention discloses a non-contact hole diameter measuring device. At present, a capacitance type sensor measuring head applied to hole diameter of a micro hole is restricted to measuring some fixed hole diameter and is low in measuring efficiency. A ball screw is fixed with an output shaft of an adjusting motor, a scale grating is fixed on the ball screw, a screw rod nut is connected with the ball screw, and an indicating grating is fixed with the screw rod nut. One end of each of four connecting rods is hinged to a motor base of the adjusting motor, and the other end of each connecting rod is respectively hinged to one push rod. One end of each of four push rods is hinged to the screw rod nut, and the other end of each push rod is respectively fixed with one electrode plate liner base. Electrode plates are respectively fixed on the end faces of the same ends of four electrode plate liner bases, the electrode plate liner bases and electrode plates are cylinders with the cross sections in a fan shape, and the four electrode plates are evenly distributed along the circumference. The electrode plates are adjustable in the radial direction, and precision measurement of variable hole diameters, including measurement of micro holes with large length-diameter ratios and stepped holes, can be achieved.

Description

technical field [0001] The invention belongs to the technical field of precision measuring instruments, and relates to an aperture measuring device, in particular to a non-contact aperture measuring device. Background technique [0002] With the rapid development of modern science and technology in aerospace, mold, automobile and other industrial fields, the processing and measurement technology of micro-aperture is one of the important research directions of scholars at home and abroad. Non-contact measurement has the advantages of not being affected by the measurement force and high measurement accuracy, which makes up for the shortcomings of contact measurement, and is widely used in the measurement of small apertures. [0003] Research on micro-sized high-precision measurement is of great significance. At present, the methods of non-contact measurement of micro-aperture mainly include: optical measurement method, capacitive sensing measurement method, Fraunhofer diffrac...

Claims

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Application Information

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IPC IPC(8): G01B11/12
Inventor 王文王盛张敏诸丽燕袁科杰朱凌俊任亚琳许晓娇叶佳翔
Owner HANGZHOU DIANZI UNIV
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