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Multi-function laser diffraction measuring apparatus and its measuring method

A technology of laser diffraction measurement and measurement method, applied in the non-contact multifunctional laser diffraction measurement instrument and its measurement field, can solve the problems of inconvenient operation, inefficient data processing method, small measurement range, etc., and achieves convenient operation and structure. Simple and novel, advanced method effect

Inactive Publication Date: 2003-07-23
LIAONING TECHNICAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Chinese patent CN01211689.0Y discloses a laser diffraction measuring instrument, which is mainly composed of a base, a laser generator, an edge column, a negative lens and a column, a light screen measuring frame, a capacitance digital caliper, a differential amplifier, a receiving It is composed of main components such as light screen, support, measuring platform, edge, laser beam positioning plate, plane mirror receiving light screen, etc. The measurement method is to fix the capacitive digital caliper on the square optical Behind the screen frame, when measuring the diffraction fringes in the horizontal direction or vertical direction, remove the screen frame from the base of the instrument, turn it 90° and then fix it on the base with screws for measurement. The equipment has a small measurement range and insufficient operation Convenience, data processing method is not fast enough and other disadvantages

Method used

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  • Multi-function laser diffraction measuring apparatus and its measuring method
  • Multi-function laser diffraction measuring apparatus and its measuring method
  • Multi-function laser diffraction measuring apparatus and its measuring method

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Experimental program
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Effect test

Embodiment 1

[0038] Embodiment 1: Measurement of the straightness error of the shaft busbar

[0039] Refer to attached figure 1 , first put the V-shaped block 7-3 into the horizontal groove 1-3 of the support frame base on the base 1, then place the measured shaft 7-4 in the V-shaped groove of the V-shaped block 7-3, and turn the handwheel 2-10 Adjust the height of the laser beam so that the laser beam is tangent to the highest busbar of the measured axis, adjust the position of the edge clamp block 3-16 in the horizontal groove 1-2 of the edge bracket base on the base 1, and place the edge 3-15 is placed at the tangent point between the laser beam and the busbar of the measured shaft, loosen the locking screw 3-17, coarsely adjust the edge 3-15 to make it close to the highest busbar of the shaft, and turn the adjustment screw 3-9 to fine-tune the edge Edge 3-15, so that clear diffraction fringes appear on the receiving light screen 5-22, aiming block 4-7 is packed in the hole of negative...

Embodiment 2

[0045] Embodiment 2, the measurement of roundness error

[0046] Fix the conjoined V-shaped block 8-1 with the top 8-4 and the pull plate 8-5 in the transverse groove 1-3 of the base 1, and use the two tops 8-4 to jack up the tested part. Other adjustments that should be made are the same as the adjustment content and method during straightness error measurement. Similarly, this embodiment also adopts a capacitive digital display ruler and a linear array CCD to measure, and uses a dial indicator on the optical dividing head to conduct a comparative measurement. When measuring, try to make the measurement section the same and the location of the measurement points the same.

[0047] When measuring with a capacitive digital display ruler and a linear array CCD, you should also follow the prompts on the computer screen to select the roundness error and enter the relevant data. When measuring, use the indexing plate and the pointer to index, and space 45 on the same circle. ° Me...

Embodiment 3

[0052] Embodiment 3, the measurement of the diameter of shaft gets a 90 ° V-shaped block and diameter d o One piece of known standard shaft requires d o It should be slightly smaller than the minimum limit size of the measured shaft, and the closer the better. First put the standard axis on the V-shaped block, adjust the laser beam to be tangent to the upper generatrix of the axis, then adjust the edge to form a slit with the upper generatrix of the axis, and measure the diffraction with a capacitive digital display ruler and a CCD respectively Stripe spacing D o Finally, take down the shaft, put the measured shaft, and measure the diffraction fringe spacing D respectively, then the diameter of the measured shaft is: d=d o -KλL / Ks (1 / D-1 / D o ), where: Ks is the reflection coefficient, for a 90° V-shaped block Ks=1.2071. In this example, the standard shaft diameter d o =φ29.983, measured with capacitive digital display ruler and computer: D o =1.9975mm, D=2.2425mm, measur...

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Abstract

The disclosed the measuring apparatus and method are applicable to the area of mechanical manufacture. The power supply for the laser, the backup piece, the negative lens parts are installed in the base seat of the measuring apparatus. The rotation plate 5-6 and cassette 5-12 are installed in the screen upright column 5-3 of the capacity-grid type digital display ruler 5-5 module. The both of thedigital display ruler 5-5 and the receiving light screen 5-22 are fixed on the rotation plate 5-6. The linear CCD array camera array is installed on the CCD upright column 6-3. The apparatus possesses two optical paths: the digital display ruler and the linear CCD array. The computer through program processed and calculated displays the measured result and the graphics.

Description

Technical field [0001] The invention relates to a laser measuring instrument in the field of mechanical manufacturing and its measuring method, in particular to a non-contact multifunctional laser diffraction measuring instrument for measuring various sizes, polynomial shape and position errors, surface roughness and outer cone angle and its measurement method. Background technique [0002] Chinese patent CN01211689.0Y discloses a laser diffraction measuring instrument, which is mainly composed of a base, a laser generator, an edge column, a negative lens and a column, a light screen measuring frame, a capacitance digital caliper, a differential amplifier, a receiving It is composed of main components such as light screen, support, measuring platform, edge, laser beam positioning plate, plane mirror receiving light screen, etc. The measurement method is to fix the capacitive digital caliper on the square optical Behind the screen frame, when measuring the diffraction fringe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/00G06T1/00
Inventor 马和赵丽娟王天煜王成俊何东武
Owner LIAONING TECHNICAL UNIVERSITY