A device and method for measuring the inner diameter of a small-bore smoothbore long-bore tube
A measuring device and small-aperture technology, applied in the direction of measuring devices, optical devices, instruments, etc., can solve the problem of difficult measuring head
Active Publication Date: 2018-11-13
INST OF FLUID PHYSICS CHINA ACAD OF ENG PHYSICS
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Problems solved by technology
Therefore, the current common optical inner diameter measuring equipment is generally suitable for measuring smoothbore tubes with an inner diameter greater than Ф50.0mm. Design is very difficult
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[0042] All the features disclosed in this specification, or all disclosed methods or steps in the process, except for mutually exclusive features and / or steps, can be combined in any manner.
[0043] Any feature disclosed in this specification, unless specifically stated, can be replaced by other equivalent or equivalent alternative features. That is, unless otherwise stated, each feature is just one example of a series of equivalent or similar features.
[0044] Related description of the invention:
[0045] 1. The inner circular section of the tube to be tested refers to the section where the plane formed by the optical fiber probe intersects the measured small diameter (inner diameter less than Ф50.0mm) smooth bore long barrel (length greater than 10m) and the deep hole.
[0046] 2. The center of the inner circular section of the tube to be measured refers to the geometric center of the inner circular section of the tube to be measured. The long-bore tube with small aperture is th...
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The invention relates to a smoothbore pipe inner diameter measuring system, and especially relates to a small-bore smoothbore long body pipe inner diameter measuring device and method. Aiming at the problem existing in the prior art, a measuring device and method are provided, and the measuring device can measure the inner diameter of small-bore smoothbore long body pipes and deep holes. According to the invention, a computer transmits a digital controlled signal to a digital acquisition card in a measuring host, a digital output channel of the digital acquisition card sends the digital controlled signal to two fiber optical switches, and synchronous switching of fiber links is carried out. After channel switching is completed, a light-delay-assigned fiber link emitted by a light source is conveyed to an assigned fiber probe through a first fiber optical switch and a fiber circulator, light is emitted to the circular cross-section of the interior of the pipe to be measured from the fiber probe, after being reflected by the circular cross-section, the light becomes signal light, and the signal light and reference light reflected by the end face of the fiber probe generate optical interference, after being coaxially transmitted, the optical interference signal is sent into a photoelectric detector through a second fiber optical switch for recording, the distance between the front end of the probe and the circular cross-section of the interior of the pipe to be measured is worked out by the computer, by combing data obtained by taking the standard light surface ring gauge inside diameter as the reference, polar coordinates of a plurality of measuring points in the circular cross-section of the interior of the pipe to be measured can be obtained, and the polar coordinates are subjected to ellipse fitting to obtain the inner diameter of the cross section to be measured of the pipe.
Description
Technical field [0001] The invention relates to a measuring system for the inner diameter of a smooth bore tube, in particular to a device and method for measuring the inner diameter of a long body tube with a small aperture. Background technique [0002] In the fields of smoothbore gun barrel processing and dynamic high-pressure loading experiments for studying material high-pressure state equations, how to accurately measure the inner diameter of artillery and light-gas gun barrels is the most concerned issue during barrel processing and use. Accurate measurement of guns The inner diameter of the tube is closely linked to controlling the flying attitude of the projectile and improving the accuracy of hitting. Therefore, the technique of measuring the inner diameter of smoothbore gun barrels has always been a hot spot of concern for military production units, weapons research departments and scientific research institutes. [0003] At present, there are two main types of measurin...
Claims
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IPC IPC(8): G01B11/12
CPCG01B11/12
Inventor 马鹤立翁继东王翔陶天炯刘盛刚郝龙陈宏王为康强黄金叶素华蓝强鲜海峰吴强刘仓理谭华傅秋卫陈万新
Owner INST OF FLUID PHYSICS CHINA ACAD OF ENG PHYSICS