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Noncontact optical volume measurement method for complex-surface and irregular objects

A complex surface and optical measurement technology, applied in the direction of measuring devices, optical devices, instruments, etc., can solve the problems of inconvenient measurement process, expensive instruments, unsuitable for promotion, etc., to achieve convenient operation, high precision, and suitable for large-scale promotion Effect

Active Publication Date: 2014-11-05
广东小镰刀教育科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The drainage method cannot detect objects that cannot be soaked in water such as medicine and chemical industry, and the measurement process is inconvenient; although the measurement results of ultrasonic volume measurement, CT tomographic three-dimensional image restoration and laser scanning volume measurement are accurate, the equipment is expensive and the operation is complicated. not suitable for promotion

Method used

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  • Noncontact optical volume measurement method for complex-surface and irregular objects
  • Noncontact optical volume measurement method for complex-surface and irregular objects
  • Noncontact optical volume measurement method for complex-surface and irregular objects

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Embodiment 1

[0046] Such as Figures 1 to 12 As shown, the embodiment of the present invention provides an object volume measurement device for measuring complex surfaces to realize object volume measurement on complex surfaces, such as some protrusions or depressions on the surface. The specific principles are as follows:

[0047] In this embodiment, three SunTime FX30 color 1 / 4"CCD image sensors are used to collect images. The working voltage is 5V, the working current is 400mA, the effective pixel is 680H*480V, and the scanning method is progressive scanning. USB2.0 CMOS / CCD high-speed series products, using SONY high-end CCD photosensitive chip, has the characteristics of good color reproduction, high image quality, and high sensitivity. It provides high-precision raw data for object volume measurement.

[0048] Since we use the LabVIEW program to control the rotation platform 2 to let the camera 3 take an image every time it rotates 0.9 degrees, since 120 degrees is not an integer mu...

Embodiment 2

[0067] An embodiment of the present invention provides a volume measurement device for irregularly shaped objects to realize the volume measurement of irregularly shaped objects. The specific principles are as follows:

[0068] Before the measurement, we adjust the measuring device, adjust the three mechanical arms 5, make the angle between the three mechanical arms 5 be 120 degrees and align each camera 3 with the center of the rotating platform 2, adjust the level of the rotating platform 2, And make the camera 3 parallel to the rotating platform 2, turn on the auxiliary light source 6, so that the light of the auxiliary light source 6 evenly shines on the object under test. And complex surface objects are placed in the middle of the rotating platform 2 to facilitate volume measurement.

[0069] The stepping motor is controlled by the LabVIEW program to drive the rotating platform 2 to rotate, and three cameras 3 are simultaneously controlled to take pictures of the measured...

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Abstract

The invention relates to a noncontact optical volume measurement method for complex-surface and irregular objects. The method is based on the volume measuring technology of image processing. The method comprises the steps of camera calibration, image acquisition, image preprocessing carried out through filtering to remove interference information in an image, image binarization processing, image pixel and graphic height calculation, object base area calculation, and volume calculation. The problem that measurement of the volume of an object requires contact with the object currently is solved, the problems such as the need for three-dimensional image reconstruction and object three-dimensional data point generation and long measuring time in the process from image processing to volume calculation are solved, and the problem that computed tomography (CT) scanning and laser scanning equipment and other testing equipment are expensive is solved. By using the device to measure the volume of a complex-surface object, the advantages of high measuring speed, high precision and convenient operation can be achieved.

Description

technical field [0001] The invention relates to the field of object volume measurement, in particular to a non-contact optical measurement method for complex surfaces and irregular object volumes. Background technique [0002] With the rapid development of society and industry, volume measurement has become an indispensable part of many industrial productions. Only volume measurement devices with high precision, high speed and wide application range can meet the needs of modern industrial production. [0003] At present, domestic research methods on this issue mainly use drainage method, ultrasonic volume measurement, CT tomographic three-dimensional image restoration and laser scanning volume measurement. The drainage method cannot detect objects that cannot be soaked in water such as medicine and chemical industry, and the measurement process is inconvenient; although the measurement results of ultrasonic volume measurement, CT tomographic three-dimensional image restorati...

Claims

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Application Information

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IPC IPC(8): G01B11/00
CPCG01B11/00
Inventor 林楚涛陈培宏曹辉钟土基梁佩莹罗梦婵
Owner 广东小镰刀教育科技有限公司
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