Laser Scanner GNSS Global Coordinate Integration
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Solution Overview
Problem
Conventional laser scanner systems require complex and time-consuming measurements of machine reference points, instrument height, and back sight points for each installation, making the integration of point cloud data from multiple points cumbersome and inefficient.
Innovation Solution
A laser scanner system equipped with a GNSS device and a control arithmetic unit that obtains global coordinate values for the scanner's installation position, determines a target central position, and combines point cloud data using shape matching based on these coordinates, allowing for easier installation and integration of data from multiple points without the need for repeated measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional methods using machine reference points, instrument height, and back sight points are used to combine point cloud data, then coordinate system integration is achieved, but work complexity and measurement time increase significantly
Solution Approach 1:
The patent extracts and eliminates the complex measurement procedures (machine reference points, instrument height measurements, and back sight point requirements) from the point cloud data combination process. By using GNSS-based absolute positioning, the system removes these intermediate measurement steps while maintaining coordinate integration accuracy through direct global coordinate acquisition at each installation point.
Solution Approach 2:
The patent applies universality by using GNSS positioning as a universal coordinate reference system that works across multiple installation points without requiring point-specific calibration. The same GNSS-based approach can be used at any installation location, eliminating the need for location-specific back sight points and machine reference point measurements.
2Measurement precision
If multiple back sight points with known coordinates are measured to combine point cloud data, then data integration is achieved, but the number of measurements and time required increase
Solution Approach 1:
The patent implements self-service by using the GNSS device to automatically provide global coordinate information at each installation point without requiring manual measurement of back sight points. The system serves itself by acquiring positioning data directly from satellite signals, eliminating the time-consuming process of measuring and recording multiple back sight points at each location.
3Ease of manufacture
If instrument height and machine reference points are measured at each installation point, then coordinate transformation is possible, but installation complexity and measurement workload increase
Solution Approach 1:
The patent extracts and removes the requirements for measuring instrument height and machine reference points from the installation procedure. By relying on GNSS-based absolute positioning, the system eliminates these measurement steps entirely, allowing the laser scanner to be installed at any location without complex calibration procedures.
Solution Approach 2:
The patent changes the fundamental parameter used for positioning from relative measurements (instrument height, machine reference points) to absolute global coordinates obtained via GNSS. This parameter change transforms the installation process from one requiring precise local measurements to one using satellite-based absolute positioning, significantly simplifying the procedure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach simplifies the installation process, reduces the need for repeated measurements, and enables efficient conversion of point cloud data into global coordinates, improving workability and ease of use in various environments.
Implementation Method 1
a GNSS device; to obtain global coordinate values of an installation position of the laser scanner from the GNSS device
Implementation Method 2
a distance measuring unit for emitting a distance measuring light, receiving a reflected light from an object to be measured, and performing a distance measurement
Data Source
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AI summary
The invention provides a laser scanner system, which comprises a laser scanner which includes a distance measuring unit for emitting a distance measuring light, receiving a reflected light, and performing a distance measurement, a scanning unit for rotatably irradiating the distance measuring light, a directional angle detecting unit for detecting an irradiating direction of the distance measuring light, a GNSS device and a control arithmetic unit, and a target which sets a back sight point, wherein the control arithmetic unit has a target scanning mode and a point cloud data measurement mode, and is configured to calculate point cloud data with a global coordinate value and a global coordinate value of the target based on the global coordinate value obtained by the GNSS device, a measurement result obtained by executing the point cloud data measurement mode and a measurement result obtained by executing the target scanning mode.