Pipeline Inner Wall Measuring System
A measurement system and pipeline technology, applied in the field of precision measurement
Active Publication Date: 2021-03-19
NAT INST OF METROLOGY CHINA
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[0004] Based on this, it is necessary to provide a pipe inner wall measurement system with simple operation and high measurement accuracy for the problem that the traditional measurement system cannot detect the hidden part of the pipe in the curved pipe, resulting in low measurement accuracy.
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[0028] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail through the following embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present application, not to limit the present application.
[0029] The serial numbers assigned to components in this document, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequence or technical meaning. The "connection" and "connection" mentioned in this application all include direct and indirect connection (connection) unless otherwise specified. In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", The orientation or positional relationship indicated by "bottom"...
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The invention provides a measuring system for an inner wall of a pipeline. When an optical path of a laser tracker cannot directly reach an inner wall region of a measured bent pipeline, the laser tracker sends out a first beam of laser and enters through a port at one end of the measured bent pipeline. At the moment, the first beam of laser is emitted to a reflection structure, and the directionof the optical path of the first beam of laser is changed. Meanwhile, a retro-reflection pressing mechanism is arranged at a position which cannot directly reach the inner wall region of the pipeline,so that the first beam of laser reflected by the reflection structure is emitted to a first retro-reflection structure of the retro-reflection pressing mechanism, the first beam of laser is retro-reflected by the first retro-reflection structure to form a second beam of laser, and the second beam of laser returns the laser tracker along the optical path of the first beam of laser. The laser tracker receives the second beam of laser and computes spatial position information of the first retro-reflection structure through the laser tracker, so that inner wall information of the inner wall areawhere the optical path of the laser tracker cannot directly reach of the pipeline can be acquired.
Description
technical field [0001] The application relates to the field of precision measurement, in particular to a measurement system for the inner wall of a pipeline. Background technique [0002] In the field of industrial production, due to its special structural characteristics, circular tube devices are widely used in various aspects, such as pipelines for conveying fluids, storage containers, and some large mechanical parts, which have higher and higher dimensional accuracy of the inner wall of the pipeline. Therefore, the accurate detection of the inner wall of the pipeline becomes very important. [0003] Due to the changing structural characteristics of the pipe bending, part of the inner wall of the pipe is hidden and is not easy to be detected. The traditional measurement system cannot detect the hidden parts of the curved pipe, so that the traditional measurement system and measurement method cannot effectively reflect the shape and size of the invisible inner wall of the...
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IPC IPC(8): G01B11/00G01B11/24
Inventor 缪东晶刘学德王国磊李建双李连福张帅郑继辉
Owner NAT INST OF METROLOGY CHINA