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Method for detecting coaxiality and verticality of large container by optical instrument

A technology for large containers and optical instruments, applied in instruments, optical devices, measuring devices, etc., can solve the problems of inability to meet the requirements of measurement accuracy, high cost, long cycle, etc., to solve the problem of measuring and adjusting orientation errors and position errors problems, high accuracy, and the effect of saving measurement costs

Active Publication Date: 2010-12-29
HARBIN BOILER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary geometric measuring tools used in the traditional detection of large containers have poor accuracy, long cycle time and high cost, and can no longer meet the requirements of existing product measurement accuracy.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The method of measuring the concentricity and verticality of large containers by optical instruments, the first step is to use the micrometer collimation telescope to establish the reference axis line, and then install the triangular center bracket on the tested head, and the micrometer drum reads the center of the bracket relative to The deviation value of the reference axis line (that is, equal to the coaxiality), the second step is to install a verticality measuring ruler on the end face of the measured head, using the self-collimation method, the mirror in front of the telescope or the reflection mirror of the large target and the main light of the telescope When the axis is vertical, the self-collimation image and the self-image are completely coincident. If they do not coincide, adjust the angle between the reflective large target and the main optical axis of the telescope so that the self-collimation image and the self-image are completely coincident. Use the scale...

Embodiment 2

[0020] The method of measuring the coaxiality and verticality of large containers with optical instruments, firstly use the micrometer collimator telescope to establish the reference axis line through the two center bracket targets, then install the triangular center bracket on the tested head, and use the micrometer drum to read Take the deviation of the center relative to the axis, calculate the coaxiality value, and then install a verticality measuring ruler on the end face of the measured head, and use the micro-collimation telescope to self-collimate the reflector on the plane; when the reflector or reflector in front of the telescope When the large target is perpendicular to the main optical axis of the telescope, the self-collimation image of the angle reticle and the self-image of the angle reticle can be seen in the eyepiece of the telescope to completely coincide; Vertical, after being adjusted to pass, the verticality can be calculated from the scale value of the ret...

Embodiment 3

[0022] The method for detecting the coaxiality and verticality of a large container by an optical instrument described in embodiment 1 or 2, the calculation formula is based on the principle of automatic reflection, the reflection plane is located in front of the telescope, and the distance from the displacement reticle is L , the displacement reticle forms a mirror image at the same distance L behind the reflector. Adjust the focusing handwheel to focus the image of the displacement reticle. The vertical position of the main optical axis is inclined by an angle α, and the inclination angle is calculated by the following formula:

[0023] α=X / 2L (radian)...................................(1) In the formula, X is the center of the displacement reticle image to the datum The distance between the lines, the X value is obtained from the size of the ring on the displacement reticle and the indication value of the micrometer drum:

[0024] X=R±b................................(2) w...

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Abstract

The invention relates to a method for detecting coaxiality and verticality of a large container by an optical instrument. The large petrochemical containers have common characteristics such as complicated structure, large geometric dimension and high manufacturing precision requirement. The method for detecting coaxiality and verticality of the large container by the optical instrument comprises the two steps of: (1) establishing a datum axis line by using a micro-alignment telescope, mounting a triangular centre bracket at a measured seal head, and reading an offset value of the bracket centre relative to the datum axis line by a micro-drumwheel; and (2) arranging a verticality measuring scale at the end face of the measured seal head, enabling an auto-collimation image to be completely superposed with a local image with an auto-collimation method when a reflector or a large reflection object in front of the telescope is vertical to the principal optical axis of the telescope, if the auto-collimation image is not superposed with the local image, adjusting the included angle between the large reflection object and the principal optical axis of the telescope to enable the auto-collimation image to be completely superposed with the local image, and computing the value of the verticality by using the scale value of a displacement graticule on the telescope and the read value of the micro-drumwheel. The invention is used for detecting the coaxiality and the verticality of the large container.

Description

Technical field: [0001] The invention relates to a method for detecting the coaxiality and verticality of a container with an optical instrument, in particular to a method for detecting the coaxiality and verticality of a large container with an optical instrument. Background technique: [0002] The shape error and position error of large petrochemical containers exist objectively, and large petrochemical containers have a common feature: complex structure, large geometric size, and high manufacturing precision requirements (the current accuracy requirements for coaxiality and verticality are ≤3mm and ≤5′), that is, the difficulty of detection increases. In the process of detecting and adjusting the coaxiality and verticality of large containers, after the coaxiality is adjusted, the verticality will change and produce deviations. Similarly, the adjustment of the verticality will also cause the deviation of the coaxiality, which shows that the adjustment is difficult. Ordin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/27G01B11/26
Inventor 刘引刘爽
Owner HARBIN BOILER
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