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Laser tracking multi-station positioning method for super-large gears

A technology of laser tracking and positioning method, which is applied in the direction of using optical devices, measuring devices, instruments, etc., can solve the problems of insufficient precision, and achieve the effects of improving three-dimensional measurement accuracy, good precision control effect, and reliable data source

Active Publication Date: 2014-04-09
BEIJING UNIV OF TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

This method effectively solves the problem of insufficient precision in the positioning of existing super-large gears, provides a reliable data source for the establishment of gear coordinate models, and improves the three-dimensional measurement accuracy of the measurement points required for gear positioning

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  • Laser tracking multi-station positioning method for super-large gears
  • Laser tracking multi-station positioning method for super-large gears
  • Laser tracking multi-station positioning method for super-large gears

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with accompanying drawing:

[0029] 1) if figure 1 As shown, several test points are arranged on the upper end face and addendum circle of the gear and numbered in sequence (the first test point, the second test point...the nth test point), usually according to the sequence of the test points. , the numbering sequence is not mandatory, but remember the numbers corresponding to each point to be measured and the total number n of points to be measured. Then move the reflector to each point to be measured according to the serial number of the point to be measured, and measure the three-dimensional coordinate value of the point to be measured on the gear. Move the laser tracker to different stations in turn. The station can be set at will, but make sure that the laser tracker can measure all the points to be measured at each station, and repeat the measurement of the points to be measured on the gear in t...

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Abstract

A positioning method for a super-large gear laser tracking in-situ measurement system belongs to the technical field of precision measurement. Based on the positioning method, different measurement spaces are divided and different stations are arranged first according to global geometric features of different gears. During positioning, a plurality of to-be-measured points are arranged in a measurement area, and usually, modeling of a large gear requires acquisition of measurement data of the upper end face and the addendum circle of the gear. A laser tracker carries out measurement outside the area of the to-be-measured points, and the laser tracker is sequentially moved to acquire three-dimension coordinate values of the to-be-measured points of different stations. In order to unify the coordinate values of the to-be-measured points of different stations, a reference station needs to be selected to unify coordinates of other stations to the reference station. Finally, optimization calculation is carried out with the use of redundant data provided by the multiple stations to obtain coordinate correction values of the to-be-measured points, thus providing a reliable data source for building a gear coordinate model and improving the accuracy of gear positioning.

Description

technical field [0001] The invention relates to a positioning method for a super-large gear laser tracking in-position measurement system. The method is not only suitable for the super-large gear laser tracking in-position measurement system, but also has strong practicability in other similar large-scale distributed measurement systems . It belongs to the technical field of precision testing. Background technique [0002] Conventionally, extra-large gears usually refer to gears with a diameter greater than 3m. The super-large gear laser tracking in-situ measurement system adopts the combination of laser tracker and three-dimensional measurement platform. When measuring the system, firstly, according to the gear type and positioning algorithm requirements, the gear coordinate system of the measured gear and the instrument coordinate system of the three-dimensional measurement platform are established with the laser tracker, and then the gear coordinate system and the instr...

Claims

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Application Information

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IPC IPC(8): G01B11/00
Inventor 陈洪芳闫昊石照耀林家春
Owner BEIJING UNIV OF TECH
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