Error compensation method of positioning system based on double-rotating laser plane transmitter network

An error compensation and positioning system technology, applied in the field of error compensation, can solve problems affecting system measurement accuracy, calibration error, system calibration parameter calibration error, etc.

Inactive Publication Date: 2009-04-22
XI AN JIAOTONG UNIV
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Problems solved by technology

Before the measurement is carried out, the system needs to be calibrated. Due to the limitations of the existing measurement technology, there are calibration errors in the system calibration parameters, so there are calibration errors in the measurement process, which affects the measurement accuracy of the system.
For the system error, refer to the error compensation technology of measuring arm, theodolite, etc. Most of the existing error compensation methods use higher precision measurement tools to directly or indirectly measure the system error, and then establish an error compensation model to analyze the measurement results. Compensation, using these methods, requires the use of additional measuring equipment

Method used

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  • Error compensation method of positioning system based on double-rotating laser plane transmitter network
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  • Error compensation method of positioning system based on double-rotating laser plane transmitter network

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Embodiment Construction

[0063] Referring to Figure 1, the receiver receives the laser signal and transmits it to the computer through the data acquisition card for data processing.

[0064] refer to figure 2 Shown, O w -X w Y w Z w is the world coordinate system, the transmitter rotation axis is in the same direction as the Z axis, point T is the laser plane rotation center, point P is the point to be measured, in the figure, P and T are in the same light plane, θ is the laser plane feature angle.

[0065] refer to image 3 As shown, the flow chart of the compensation method is as follows: coordinates of uncompensated points to be measured and compensation data→compensation coefficient→measurement equation compensation→compensation coordinates→stop judgment, which serves as an iterative cycle.

[0066] The operating block diagram of the indoor positioning measurement system is shown in Figure 1. The present invention requires three or more turntable transmitters, receivers, signal acquisition c...

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Abstract

The invention discloses an error compensating method for a positioning system based on a dual-rotation laser plane transmitter network. The method provides a compensating algorithm model and designs a parameter estimation algorithm, and the main implementation steps include: (1) marking the parameter; (2) collecting compensating data; (3) collecting angle data of the point to be measured; and (4) compensating measuring equation error. The step (4) includes: a) determining a compensation factor; b) compensating the measuring equation; and c) iterating until suspension condition is satisfied, so as to solve the final result. The invention relates to large scale space coordinate measuring error compensation, solves the difficulty in systemic error marking in the dual rotation laser plane space measuring positioning system, can compensate the error item of the laser plane measuring equation and improves the systemic measuring precision.

Description

technical field [0001] The invention relates to the technical field of error compensation in large-scale spatial three-dimensional coordinate measurement, in particular to a positioning system error compensation method based on a double-rotation laser planar transmitter network. Background technique [0002] In the manufacturing and assembly process of large mechanical equipment, such as aircraft manufacturing, shipbuilding, large power station and heavy machinery equipment manufacturing, the measurement of large-scale geometric and shape errors is the key to the quality of the entire set of equipment. At present, the relatively mature large-scale measurement technologies in the world mainly include laser theodolite, laser tracking measurement system and large-field visual measurement system. [0003] The position measurement and positioning system based on double rotating laser planes is a new type of coordinate measurement technology without guide rails developed in recent...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/00
Inventor 刘志刚刘中正许耀中王民刚吴剑伟刘显军洪军
Owner XI AN JIAOTONG UNIV
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