Method for precisely measuring inner diameter of multi-direction shaft hole based on laser triangulation method

A technology of laser triangulation and precision measurement, which is applied in the direction of measuring devices, optical devices, instruments, etc., can solve the problems of difficult online detection, long measurement time, high rotation accuracy requirements, etc., and achieve high automatic online measurement and fast speed , The effect of shortening the time required for measurement

Inactive Publication Date: 2010-07-28
TIANJIN UNIV
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Problems solved by technology

In the actual measurement, the random error caused by the radial runout of the rotating system has a great influence on the measurement error. The smaller the angular interval, the more the radial runout, and the greater the measurement error, ...

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  • Method for precisely measuring inner diameter of multi-direction shaft hole based on laser triangulation method
  • Method for precisely measuring inner diameter of multi-direction shaft hole based on laser triangulation method
  • Method for precisely measuring inner diameter of multi-direction shaft hole based on laser triangulation method

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Embodiment Construction

[0014] In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

[0015] See Figure 1 ~ Figure 3 , the present invention is based on a laser triangulation method for precise measurement of the inner diameter of a multi-directional shaft hole, 1) pre-calibrate the measuring head, and establish the relationship between the output electrical signal of the measurement unit and the actual surface displacement of the measured shaft hole; 2) pre-calibrate the same The triangulation method of the four probes on the circumference of the section measures the origin position; 3) Deepen the measuring rod into a certain position inside the measured shaft hole, such as figure 1 As shown, turn on the laser, such as image 3 As shown, the laser is transmitted to the inside of the probe through the pigtail 1, collimated b...

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Abstract

The invention discloses a method for precisely measuring the inner diameter of a multi-direction shaft hole based on a laser triangulation method. A measuring rod extends to the shaft hole to measure the inner diameter of the shaft hole, at least one measuring section is distributed on the measuring rod, at least two measuring heads are distributed on each measuring section, and each measuring head is a measuring member based on the measuring principle of the laser triangulation method. By applying the measuring principle of the laser triangulation method, the invention solves the problem of small measuring gap of the traditional measuring method and accomplishes the precise measurement under the condition of a large gap. A light source for measuring in the invention adopts the light transmission mode of an optical fiber so that the method greatly reduces the radial size of the measuring rod, lowers heat productivity and has obvious superiority in the size measurement of small hole diameters. The invention can accomplish the measurement of the multi-radial direction diameter size and the form and position tolerance of the shaft hole, has the advantages of high measuring efficiency and high speed and precision and can realize high-automation on-line measurement of products.

Description

technical field [0001] The invention relates to a precision detection method, in particular to a precision measurement method for the inner diameter of a multi-directional shaft hole based on a laser triangulation method. Background technique [0002] With the rapid development of my country's automobile industry, the requirements for the performance of the engine are getting higher and higher, and the matching accuracy of the hole shaft on the engine case is a key factor determining the performance of the engine. The higher the accuracy of the shaft hole fit, the higher the efficiency of the engine. High-precision, highly intelligent shaft bore diameter measurement method is an important basis for achieving ideal fit, and is also a necessary means to improve engine performance. [0003] The existing inner diameter measurement methods are divided into contact and non-contact measurement methods. Due to the wear and tear of measuring tools and human factors, the contact mea...

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Application Information

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IPC IPC(8): G01B11/08G01B11/12G01B11/00
Inventor 邾继贵谢洪波陈洁林力王仲
Owner TIANJIN UNIV
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