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Space positioning method based on double-rotating laser plane transmitter network

A space positioning and transmitter technology, applied in the direction of using optical devices, measuring devices, instruments, etc., can solve the problems of side head occlusion, loss of light, etc.

Inactive Publication Date: 2008-12-24
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these technologies have some disadvantages, such as: it takes a long time for the laser tracking measurement system to aim at the target; the side head of the laser tracking measurement system is easily blocked by surrounding objects, resulting in loss of light

Method used

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  • Space positioning method based on double-rotating laser plane transmitter network
  • Space positioning method based on double-rotating laser plane transmitter network
  • Space positioning method based on double-rotating laser plane transmitter network

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Embodiment Construction

[0066] refer to figure 1 As shown, the present invention needs a turntable transmitter, a receiver, a signal acquisition card and a computer. The turntable transmitter is driven by an AC servo motor, and two linear lasers are installed on its head to generate laser planes, namely the first laser 1 and the second laser 2, which emit laser light to form laser plane α and laser plane β. In addition, different transmitters rotate stably at different speeds, the speed ranges from 2400r / min to 3000r / min, and at the same time, the AC servo motor is controlled by the servo controller, and the servo controller sends a fixed time interval to the signal acquisition card The OZ pulse signal, the time interval of this pulse signal is related to the transmitter speed ω as The unit of ω is r / min. The receiver is composed of a photocell and a preamplifier circuit. The photocell is used to receive the laser emitted by the transmitter and convert the light signal into an electrical signal. W...

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Abstract

The invention discloses a space locating method that is based on a network of planar dual-rotation laser transmitters, the rotation of three or more than three rotating transmitters are driven by an alternate current servo motor, the rotating transmitters that have two linear laser devices arranged on the head part transmit laser signals continuously to the surrounding space, the time distance of OZ pulse between a laser peak position that is sampled by a receiver module that takes a photocell as a sensor and a time origin is converted into a rotating angle of a laser plane, and consequently, the equation of the laser plane where measured points are positioned is deduced, an equation of a straight line that runs through the measured points is further obtained, an equation set is built according to the intersection method of multiple lines, and finally the equation set is solved by the least square method, thus obtaining the coordinate positions of the measured points. The space locating method avoids object aiming when measuring, and improves measuring speed and efficiency.

Description

technical field [0001] The invention belongs to a large-scale space three-dimensional coordinate measurement method, in particular to a space positioning method based on a double-rotating 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. With the emergence of laser technology, sensor technology and other new technologies, new solutions to large-scale measurement problems have been proposed. Using the high directivity and high brightness of the laser, and the photoelectric sensor as the receiver, and the high-speed acquisition system and efficient signal processing method, the range, speed and accuracy of large-scale measurement have been significantly improved, so th...

Claims

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Application Information

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IPC IPC(8): G01B11/00
Inventor 刘志刚许耀中王民刚刘中正
Owner XI AN JIAOTONG UNIV
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