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Calibration method for linear radar measurement system based on standard plane

A line laser measurement and system calibration technology, applied in the direction of measuring devices, optical devices, instruments, etc., can solve the problems of difficult reconstruction of calibration features, complex calibration methods, and inaccurate calibration results, and achieve small errors and simple calibration objects , the effect of small system error

Active Publication Date: 2017-04-19
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0006] The purpose of the present invention is to provide a calibration method of a line laser measurement system based on a standard plane to solve the problems of complex calibration methods, difficulty in reconstructing calibration features, and inaccurate calibration results

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  • Calibration method for linear radar measurement system based on standard plane
  • Calibration method for linear radar measurement system based on standard plane
  • Calibration method for linear radar measurement system based on standard plane

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Embodiment Construction

[0041] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0042] The invention discloses a calibration method of a line laser measurement system based on a standard plane, such as figure 1 shown, including the following steps:

[0043] Step 1. Connect the line laser sensor and the CNC mobile platform, install the selected tetrahedron calibration workpiece in the measurement system, and perform initialization parameters and coordinate zeroing;

[0044] The tetrahedron calibration workpiece should ensure that its three calibration planes A, B, and C are all within the range of the measurement system, and its tolerance is less than or equal to 0.01. At the same time, the reflection of each calibration plane is not obvious, and its image in the sensor is clear. , in addition, the three calibration planes have relatively large angles with the current axis to be calibrated;

[0045] Step 2. Pass the lin...

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Abstract

The invention discloses a calibration method for a linear radar measurement system based on a standard plane, which comprises the following steps: step one, a linear laser sensor is enabled to be connected to a numerically-controlled moving platform, and a selected tetrahedron calibration workpiece is installed in the measurement system; step two, a calibration coordinate system is built according to a coordinate axis to be calibrated in a linear laser sensor coordinate system and a non-correspondence coordinate axis of the coordinate axis to be calibrated in a world coordinate system; step three, point cloud data of the calibration workpiece in the linear sensor coordinate system is acquired through the linear laser sensor; step four, calibration parameters in the calibration coordinate system are calculated according to the point cloud data acquired in the step three; step five, a direction vector of the coordinate axis to be calibrated is calculated according to the calibration parameters in the step four and a calibration model; and step six, the linear laser sensor moves along the direction of the other coordinate axis to be calibrated in the linear laser sensor coordinate system, executing the above steps in a repeated manner so as to acquire a direction vector of the other coordinate axis to be calibrated. The calibration method is high in reliability and small in system error.

Description

[0001] 【Technical field】 [0002] The invention belongs to the technical field of non-contact measurement, and in particular relates to a calibration method of a line laser measurement system based on a standard plane. [0003] 【Background technique】 [0004] Aerospace engines are the source of aircraft power and the core components of aircraft. The quality of engine blades directly affects the performance of the engine, and is the key to research and manufacture high-performance aerospace engine equipment. The blade has the characteristics of complex structure, difficult processing, high processing quality requirements, and great influence on engine performance. In each stage of blade production and processing, the shape and size of the blade need to be tested to ensure its processing accuracy and quality. . Non-contact measurement methods such as laser measurement are common methods for fast and accurate measurement. Using line laser sensor scanning measurement can greatly ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/00
CPCG01B11/002
Inventor 程云勇陈健配于龙张明李俊杰
Owner NORTHWESTERN POLYTECHNICAL UNIV
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