High precision positioning and posture-fixing device on laser radar platform and method

A laser radar and high-precision technology, applied in the field of space measurement, can solve the problems that ordinary users cannot bear, the overall cost of the Lidar system is high, and the price is expensive, so as to achieve the effect of improving accuracy, reducing cost, and reducing use cost

Inactive Publication Date: 2010-07-14
BEIJING SURESTAR TECH
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Problems solved by technology

[0010] The disadvantages of the above-mentioned high-precision position and attitude measurement system in the prior art are: the price of the entire high-precision position and attitude measurement system, especially the high-precision IMU, is very expensive, so that the overall cost of the Lidar system is very high, which is unaffordable for ordinary users

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  • High precision positioning and posture-fixing device on laser radar platform and method
  • High precision positioning and posture-fixing device on laser radar platform and method
  • High precision positioning and posture-fixing device on laser radar platform and method

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Embodiment Construction

[0028] The invention provides a device and method for high-precision positioning and attitude determination on a laser radar platform.

[0029] Describe the present invention in detail below in conjunction with accompanying drawing, the structural diagram of the embodiment of the device of the present invention is as follows image 3 As shown, it includes: a measurable camera unit, an inertial measurement unit, an aerial position measurement unit, a high-precision position, attitude measurement and calculation unit, a laser scanning unit and a three-dimensional coordinate information acquisition unit. The functions of each unit are introduced below.

[0030] Measurable camera unit: used to obtain aerial digital images through measurable cameras on the flight trajectory of the lidar platform according to the preset time interval, and use photogrammetry theory to calculate the relative orientation of adjacent aerial digital images obtained , to obtain the low-frequency and high...

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Abstract

The invention provides a high-precision positioning and posturing device and method used on laser radar platform, wherein the device main comprises: measurement photographic units, inertial measurement units and high-precision position and posture measurement and solution units. The method main comprises: obtaining air digital images through measurement photograph on the flight path of laser radar platform, then calculating air digital images relative directionally, thus obtaining low frequency high-precision posture parameters of the laser radar platform on work route; and obtaining high frequency low-precision attitude parameters of the laser radar platform through inertial measurement units; and wherein high frequency low-precision attitude parameters are amended by low frequency high-precision attitude parameters, then obtaining the laser radar platform high-precision posture parameters information. The utility of the invention can reduce the cost of high-precision position and posture measurement system, and improve the accuracy.

Description

technical field [0001] The invention relates to the field of space measurement, in particular to a device and method for high-precision positioning and attitude determination on a laser radar platform. Background technique [0002] The high-precision position and attitude measurement system records the changes of the attitude and position of the lidar platform with high precision in the Lidar (lidar) engineering measurement. The use of high-precision attitude and position measurement systems can enable Lidar (laser radar) to not only ensure measurement accuracy, but also greatly improve measurement efficiency. [0003] Due to the characteristics of Lidar's surveying and mapping work in engineering surveying, the real-time requirements of its data processing are not high. Using the high-precision attitude and position measurement system, the Lidar system's data acquisition and processing process is as follows: figure 1 As shown, the processing flow includes two stages: real-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C21/00G01C21/18G01C11/00G01S5/00
Inventor 林宗坚苏国中张珂殊
Owner BEIJING SURESTAR TECH
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