Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Appearance measuring and detecting method for inner surface of space curve type long-distance microtubule

A technology of spatial curve and detection method, applied in pipeline systems, mechanical equipment, gas/liquid distribution and storage, etc., can solve the problems of irreparable, complicated rotating mechanism, inability to detect curved pipes or micro pipes, etc., to reduce weight, The effect of eliminating the eccentricity error

Inactive Publication Date: 2009-06-17
ZHEJIANG UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the processing circuit of the CCD chip is complex and miniaturization is difficult, it is difficult for ordinary CCD cameras to enter the interior of small pipes.
Although the special industrial electronic endoscope can detect the inner wall of small pipes, it is difficult to determine the size of the defect, the specific spatial location and the three-dimensional shape of the inside of the pipe.
Although the micro pipeline robot developed by Tsuruta k. et al. can also enter the 10mm pipeline for detection, it can only observe the inner wall of the pipeline by the pictures taken by the CCD, and cannot make up for the above-mentioned shortcomings of the endoscope.
Mizunuma M and others used the position sensor PSD (Position Sensitive Detector) to realize the detection and three-dimensional reconstruction of the inner wall of the pipeline, but the rotation mechanism of the system developed by them is complicated, and it is only suitable for straight pipes with an inner diameter of 66-83mm, and cannot detect curved pipes or tiny pipe

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Appearance measuring and detecting method for inner surface of space curve type long-distance microtubule
  • Appearance measuring and detecting method for inner surface of space curve type long-distance microtubule
  • Appearance measuring and detecting method for inner surface of space curve type long-distance microtubule

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] Such as figure 1 As shown, the space curve type long-distance micro-pipe inner surface topography measuring instrument has a two-dimensional position sensor base 17, a transparent window 3, and a laser base 7 connected in sequence, and a motor fixing ring 4 is fixed in the transparent window 3. On the motor fixing ring 4, a micromotor 15, a scanning mirror seat 14, and a scanning mirror 5 connected sequentially are fixed, and a two-dimensional position sensor pressure ring 1, a two-dimensional position sensor 19, The receiving lens group 16 is fixed with an antenna fixing ring 18 outside the two-dimensional position sensor base 17, and the antenna adjusting screw 12 is fixed with an elastic antenna 2 on the antenna fixing ring 18, and the laser adjusting screws are sequentially installed on the laser base 7 10. Laser pressure ring 9, semiconductor laser 8, elastic washer 11, converging lens 6, reflector 13, antennae fixing ring 18 is fixed on the outside of laser base 7...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for checking the surface condition of spatial curvature long-distance micro tube. The inventive machine is mainly formed by a two-dimension position sensor, a semi-conductor laser, a transparent window, a micro motor, a scanning mirror, a reflector, a convergent lens, and a receiving lens. The light of laser via two reflections will form a micro spot on the inner wall of tube, while said spot is received by the two-dimension position sensor. Via the current signal of two-dimension position sensor and the structural parameters of inventive machine, the invention calculates out the position of the spot in local three-dimension coordinate. The micro motor rotates the scanning mirror one round to obtain the positions of all sampling points of one section of inner wall of tube. The invention can be used in the defect check and three-dimension measurement of the inner wall of the curvature micro tube whose inner diameter is 9-11mm and radius is larger than 100mm, while the measurement accuracy can reach +- 0.1mm.

Description

technical field [0001] The invention relates to a method for measuring and detecting the inner surface topography of a space curve type long-distance micro-pipe. Background technique [0002] A large number of pipeline parts are used in many industries such as machinery, energy, chemical industry, etc. After long-term use, defects such as cracks may appear, which may cause gas or liquid leakage, damage the entire system, and cause unnecessary economic losses, and even endanger the lives of staff. Therefore, the detection of such parts has become a very important subject. Many literatures at home and abroad have done in-depth research on this issue, but most of them are for pipes with an inner diameter greater than 20mm, and there are few research reports for small pipes, especially those with an inner diameter of less than 10mm. [0003] The detection technology of the inner wall of large pipes is relatively mature. The most common method is to use a CCD camera to image th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F17D5/02
Inventor 李江雄柯映林吴恩启
Owner ZHEJIANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products