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Optical detection method and device for coaxiality

A technology of optical detection and coaxiality, applied in the direction of using optical devices, measuring devices, instruments, etc., can solve the problem of low measurement accuracy

Inactive Publication Date: 2015-05-20
INST OF FLUID PHYSICS CHINA ACAD OF ENG PHYSICS
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: in order to overcome the shortcomings of the existing round rod coaxiality measurement method using contact measurement and low measurement accuracy, the present invention provides a high-precision coaxiality optical detection based on non-contact measurement method, this method can realize non-contact measurement, and the measurement accuracy is high

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  • Optical detection method and device for coaxiality
  • Optical detection method and device for coaxiality
  • Optical detection method and device for coaxiality

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Experimental program
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Effect test

Embodiment 1

[0076] Embodiment 1: A kind of coaxiality optical detection method comprises

[0077] Step 1: the first optical detection device and the second optical detection device respectively collect the digital image signals of the reference round rod and the opposite round rod;

[0078] Step 2: The processor receives the digital image signal collected by the first optical detection device, obtains the first included angle θ1 between the axes of the reference round rod and the opposite round rod, the first offset component y1 of the axes of the reference round rod and the opposite round rod, and obtains the An optical detection device detects the diameter value D1 of the reference round rod, and the processor receives the digital image signal collected by the second optical detection device to obtain the second included angle θ2 between the reference round rod and the opposite round rod axis, the second angle θ2 between the reference round rod and the opposite round rod The second offs...

Embodiment 2

[0079] Embodiment 2: On the basis of Embodiment 1, the angle between the optical axis of the first optical detection device and the optical axis of the second optical detection device is φ, and the range of φ is: 0°<φ<180°, and is located at the same angle as The datum round bar is perpendicular to the same plane.

Embodiment 3

[0080] Embodiment three: on the basis of embodiment one or two, the specific process of calculating the coaxiality of the reference round bar and the opposite round bar in the step 2 is:

[0081] Step 21: The first optical measurement device collects the digital image signals of the reference round rod and the opposite round rod, and the processor receives the digital image signals output by the first optical measurement device to obtain the detected diameter value D1 of the reference round rod, the axes of the reference round rod and the opposite round rod The included angle θ1, the axis offset component y1 of the reference circular rod and the opposite circular rod; the processor obtains the sampling rate of the first optical measuring device according to the formula (1)

[0082] (1)

[0083] Wherein D is the actual diameter of the reference round rod, and D1 is the detected diameter value of the opposite round rod obtained by...

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Abstract

The invention relates to the field of coaxiality detection, particularly to an optical detection method and a device for the coaxiality, and aims at overcoming the defects that the existing measuring method for the coaxiality of a round bar adopts contact measurement and the measurement accuracy is low. Non-contact measurement can be achieved and the measurement accuracy is high through the high-accuracy optical detection method based on non-contact measurement. Images are processed by a computer, the detection is rapid, and the detection efficiency of the coaxiality of the round bar can be greatly improved. According to the method and the device, parameters of theta1 and theta2 are obtained through detecting and acquiring digital image signals of a reference round bar and an opposite round bar, and coaxiality axis offset parameters and axis included angle parameters of the reference round bar and the opposite round bar are calculated.

Description

technical field [0001] The invention relates to the field of coaxiality detection, in particular to a coaxiality optical detection method and device. Background technique [0002] In the fields of industry, machinery, and scientific research, it is often necessary to quantitatively measure the coaxiality of two round rods. As shown in Figure 1, there are three situations where the axes of the round rods do not coincide: 1) If Figure 1a As mentioned above, X1 and X2 are parallel but point O does not coincide with X1; 2) as Figure 1b As shown, there is an angle between X1 and X2, but point O coincides with X1; 3) as Figure 1c As shown, there is an angle between X1 and X2 and point O does not coincide with X1. [0003] At present, the coaxiality measurement method for round rods is mainly the mechanical alignment method. The mechanical alignment method is a measurement method based on the mechanical object, mainly including the steel wire drawing method or the gauge metho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/27
Inventor 程晋明钱伟新祁双喜李泽仁刘冬兵王婉丽彭其先
Owner INST OF FLUID PHYSICS CHINA ACAD OF ENG PHYSICS
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