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Rapid distance measurement method and system based on double-sided point cloud information

A technology of point cloud information and ranging method, applied in the field of three-dimensional measurement, can solve the problems of cumbersome operation process and low measurement efficiency

Active Publication Date: 2020-10-27
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This invention has the advantage of high measurement accuracy, but it needs auxiliary devices such as multiple pre-installed reference balls, and the operation process is cumbersome and the measurement efficiency is low

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  • Rapid distance measurement method and system based on double-sided point cloud information
  • Rapid distance measurement method and system based on double-sided point cloud information
  • Rapid distance measurement method and system based on double-sided point cloud information

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Embodiment Construction

[0058] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0059] Such as figure 1 As shown, the embodiment of the present invention provides a fast ranging method based on double-sided point cloud information, the method includes the following steps:

[0060] S1 obtains the double-sided point cloud information of the object to be measured, records it as point cloud A and point cloud B, and calculates the point cloud points of point cloud A and point c...

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Abstract

The invention belongs to the field of three-dimensional measurement, and particularly discloses a rapid distance measurement method and system based on double-sided point cloud information. The methodcomprises the following steps: 1) acquiring double-sided point cloud information of a to-be-measured object, and respectively calculating point cloud points of two point clouds; 2) performing rough registration on the two point clouds through point cloud point matching; 3) performing coordinate transformation on the two pieces of point cloud data, and eliminating invalid points influencing subsequent calculation; 4) minimizing the shape difference of the two point clouds to carry out fine registration; and 5) calculating the real distance distribution of the two point clouds in combination with the distance information of the sampling points. The method is suitable for distance measurement of two surfaces with an extremely short distance, can realize rapid measurement of the distance, such as measurement of the thickness distribution of a thin-walled object or the distance distribution of a narrow gap, under the condition of only depending on three-dimensional point cloud information,and has the characteristics of rapidness, simplicity, convenience and high precision compared with the existing measurement method.

Description

technical field [0001] The invention belongs to the field of three-dimensional measurement, and more specifically relates to a method and system for fast distance measurement based on double-sided point cloud information. Background technique [0002] In today's society, the requirements for machining and measurement automation are increasing day by day. Various high-precision measurement equipment such as laser trackers, laser scanners, single / binocular cameras, etc. are widely used in industrial processing and medical systems. In these applications, the dynamic positioning and tracking of real objects and 3D reconstruction are two hot spots. The former often uses devices such as target balls to assist in marking and identifying moving individuals, while the latter often requires a large number of marking points or special tools to assist in the realization of 3D objects. complete splicing. However, the above methods all have the disadvantages of cumbersome operation, huge...

Claims

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Application Information

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IPC IPC(8): G06T7/73G06T7/60G06T7/33
CPCG06T7/73G06T7/60G06T7/33
Inventor 陶波周佩赵兴炜王乾杰
Owner HUAZHONG UNIV OF SCI & TECH
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