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Aerial multi-pulse laser scanning system using ambiguity resolution based on distance detection and 3D point analysis

A technology of laser scanning and distance detection, which is applied in the direction of radio wave measurement system, utilization of re-radiation, measurement device, etc., can solve problems such as MPiA disambiguation error, and achieve the effect of compensating drift

Active Publication Date: 2020-05-08
LEICA GEOSYSTEMS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, this sequence-based approach will especially lead to MPiA disambiguation errors in regions with rapidly changing altitudes

Method used

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  • Aerial multi-pulse laser scanning system using ambiguity resolution based on distance detection and 3D point analysis
  • Aerial multi-pulse laser scanning system using ambiguity resolution based on distance detection and 3D point analysis
  • Aerial multi-pulse laser scanning system using ambiguity resolution based on distance detection and 3D point analysis

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Embodiment Construction

[0057] figure 1 An exemplary embodiment of the MPiA laser scanner 1 of the present invention in the field of airborne measurement is shown, wherein the laser scanner 1 is installed in an airborne carrier (for example, an airplane 2 or a satellite). For example, the laser scanner 1 is configured to scan in a circular scanning pattern, for example, using a rotating tilt deflection mirror, in which the actual scanner pointing direction 3 is indicated. Due to the circular scanning movement of the laser scanner 1 and the forward flight movement of the carrier 2, the surface area is a spiral scanning pattern 4 drawn on the ground. Due to the spiral scanning pattern 4, many surface points will be scanned from two viewing angles, thereby minimizing the shadow effect.

[0058] Several additional or supplementary data sources and measurement devices are usually used to improve or calibrate LiDAR measurements, especially additional devices for determining the position and orientation of the...

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Abstract

An air multi-pulse laser scanning system using ambiguity resolution based on distance detection and 3D point analysis. An aerial multi-pulse (MPIA) laser scanning system, wherein the solved MPIA problem is in that the MpiA assignment of the return pulse of the laser scanner to the sending pulse is based on distance tracking and distance detection at intermittent time points. Each range detection includes a time-of-flight arrangement configured to be free of MPiA problems. The present invention also relates to an MPiA laser scanning system, wherein the MPiA ambiguity in the time series of the return pulse is converted to a 3D point cloud space, which provides additional information from the spatial neighborhood of the point in question to realize the MPiA ambiguity.

Description

Technical field [0001] The invention relates to a multiple-pulses-in-air (MPiA) laser scanning system for measuring the flight time of laser pulses of a laser scanner. Moreover, the present invention relates to a computer program product for measuring the flight time of laser pulses of a laser scanner. Background technique [0002] Pulse time-of-flight measurement systems are standard solutions in many different applications today. The principle used here basically consists of emitting pulsed electromagnetic radiation onto the target to be measured and then receiving the radiation returned by the target, where the time-of-flight of the pulse (ie, the transmission of the laser pulse (transmit pulse)) and the laser pulse The return from the target surface (the time difference between the reception of the return pulse) determines the distance to the target. The speed of light can then be used to calculate the range to the surface using this measurement. [0003] For example, an air...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/08G01S17/88G01S7/481G01S7/4865
CPCG01S17/08G01S17/88G01S7/4865G01S7/4817G01S17/42G01S7/487G01S17/89G01S17/10G01C15/002G01S7/4808G01S7/4861
Inventor 潘志刚J·C·桑德斯三世杨全
Owner LEICA GEOSYSTEMS AG