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Portable non-contact roundness measurement instrument

A roundness measurement, non-contact technology, applied in the direction of instruments, measuring devices, optical devices, etc., can solve the problems that affect the measurement accuracy, it is difficult to find the maximum and minimum diameter, measurement error, etc., and achieve high measurement accuracy , limited cost, and easy to carry

Inactive Publication Date: 2015-04-29
胡长华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most factories use calipers to measure manually, and it is difficult to find the maximum and minimum diameters
Patent 201120256720.6 discloses a roundness measuring instrument for steel pipes. The displacement of the steel pipe is measured with a rotary grating ruler on the workbench. This method requires a mechanical rotation around the steel pipe. Long-term use will wear out and affect the measurement accuracy.
Patent 201120049924.2 discloses a device for measuring the ellipticity and diameter of large-diameter longitudinally welded pipe ends. The device uses a screw-driven laser displacement sensor to measure the circular section of the steel pipe. The mechanical scanning movement will cause measurement errors.

Method used

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  • Portable non-contact roundness measurement instrument
  • Portable non-contact roundness measurement instrument
  • Portable non-contact roundness measurement instrument

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Experimental program
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Embodiment Construction

[0012] Such as figure 1 Shown, portable non-contact roundness measuring instrument. Including 1 laser tube, 2CCD, 3DSP image processor,

[0013] 4 LCD screen, 5 shell, 6 steel pipe to be tested.

[0014] The laser tube 1 emits a plurality of distributed line lasers and is fixed on the casing 5 .

[0015] The DSP image processor 3 can adopt an embedded DSP based on the TMS320DM642 chip, and the measurement results are displayed on the small-size LCD screen 4, which is convenient for the instrumentation of the measurement device. The measurement results can also be transmitted to the data memory or database in a wired or wireless manner through the serial communication interface of the DSP. For example, the serial port USB module can be recorded on the U disk file, and the serial port SD module can be recorded on the SD card file. The serial port wireless module can be wirelessly connected with the server database, and can also be connected to the Internet through the network...

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PUM

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Abstract

The invention provides a portable non-contact roundness measurement instrument. According to the portable non-contact roundness measurement instrument, an end surface image of a tested steel tube is collected by a CCD (charge coupled device), and the roundness is tested with a DSP (digital signal processor) image processing algorithm. The instrument has lower cost, is simple and convenient to operate and is suitable for non-contact field high-precision roundness measurement.

Description

Technical field: [0001] The invention relates to a non-contact roundness measuring device, in particular to a portable non-contact roundness measuring instrument. Background technique: [0002] During the production and use of steel pipes, roundness measurement is required. At present, most factories use calipers to measure manually, and it is difficult to find the maximum and minimum diameters. Patent 201120256720.6 discloses a roundness measuring instrument for steel pipes. The displacement of the steel pipe is measured with a rotary grating ruler on the workbench. This method requires a mechanical rotation around the steel pipe, and long-term use will wear out and affect the measurement accuracy. Patent 201120049924.2 discloses a device for measuring the ellipticity and diameter of large-diameter longitudinally welded pipe ends. The device uses a screw-driven laser displacement sensor to measure the circular section of the steel pipe. Measurement errors may be caused by ...

Claims

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Application Information

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IPC IPC(8): G01B11/24
Inventor 胡长华
Owner 胡长华