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Structured light grating in accordance with detection of inner wall of cylinder

A structured light and grating technology, applied in the field of three-dimensional detection, can solve the problems of complex and complex surface structured light detection equipment, and achieve the effect of easy precision

Inactive Publication Date: 2018-09-14
ARMY ENG UNIV OF PLA
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Problems solved by technology

[0007] However, the surface structured light detection equipment is more complicated and complicated, and it is difficult to apply to the limited physical space in the cylinder. Therefore, it is necessary to use line structured light for detection in the detection process inside the cylinder.

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  • Structured light grating in accordance with detection of inner wall of cylinder
  • Structured light grating in accordance with detection of inner wall of cylinder

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Embodiment Construction

[0018] The technical solution of this patent will be further described in detail below in conjunction with specific embodiments.

[0019] see Figure 1-2 , for the structured light grating detected on the inner wall of the cylinder, the structured light grating is composed of laser bars with different thicknesses, such as figure 1 shown. The grating contains n groups of identical laser stripes, each of which includes m thin laser stripes and 1 thick laser stripe. The thick laser stripes are easy to identify and are used for rough positioning to achieve mutual correspondence between broken light stripes. The thin laser stripes The bar facilitates the precise extraction of the center line of the laser bar, which is used to accurately calculate the distance between the broken laser bars, such as figure 2 shown. The thick laser bars are easy to identify, and the thin laser bars are corresponding to the number of laser bars spaced between the thick laser bars by counting.

[0...

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Abstract

The invention discloses a structured light grating in accordance with the detection of the inner wall of a cylinder. The structured light grating comprises laser strips with different thickness, wherein the structured light grating comprises n groups of same laser strips; each group of the laser strips comprises the laser strips with different thickness; each thick laser strip is easy to recognize, and is used for coarse positioning, so that mutual correspondence between broken optical strips is realized; through thin optical strips, a center line of each laser strip is convenient to accurately extract, and is used for accurately calculating the distance between every two broken optical strips; and the width of each thin laser strip is several microns or so, the width of each thick laser strip is dozens of microns or so, and the interval between every two adjacent laser strips is dozens of microns or so. According to the structured light grating disclosed by the invention, based on thecondition that the structured light is high in measuring accuracy, a manner that the laser strips with different thickness are arranged according to regularity is adopted, so that the complexity of the detection procedure is simplified.

Description

technical field [0001] The invention relates to the field of three-dimensional detection of objects, in particular to a structured light grating for detection of the inner wall of a cylinder. Background technique [0002] At present, the three-dimensional detection technology for physical objects can be divided into two categories: contact measurement and non-contact measurement according to whether the measurement sensor is in contact with the surface of the object. [0003] In touch measurement, the three-coordinate measuring machine is the most representative. The basic operation of the three-coordinate measuring machine is to measure the "point". The probe on the three-coordinate measuring machine touches the surface of the object to be measured and moves along the surface. Movement; during the movement, the probe moves up and down with the surface fluctuations of the measured object, and continuously records the position of each point; then calculates the distance and p...

Claims

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Application Information

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IPC IPC(8): G01B11/25G01B11/22
Inventor 邵新杰宋彬丁超刘金华王怀光黄富瑜范红波刘干吴定海
Owner ARMY ENG UNIV OF PLA
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