Laser Navigation System Using Reflection Devices for Precision Positioning
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Solution Overview
Problem
Current outdoor mobile platforms face limitations in navigation accuracy due to positioning errors, especially in outdoor environments with large areas and obstacles, affecting their work efficiency.
Innovation Solution
A navigation system comprising reflection devices marked with specific reflective materials, a movable platform equipped with a positioning system, a laser range finder, and a processor that calculates absolute locations and controls movement within a marked range, reducing positioning errors by using a laser to track and calibrate the platform's position relative to the reflection devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional positioning systems are used for outdoor mobile platforms, then the system structure is simple, but the navigation accuracy deteriorates due to positioning errors in large outdoor areas
Solution Approach 1:
The patent introduces reflection devices as intermediary objects between the laser range finder and the environment. These devices reflect laser beams back to the sensor, enabling precise measurement of the mobile platform's position and orientation relative to known reference points, thereby achieving centimeter-level navigation accuracy without requiring complex positioning infrastructure
Solution Approach 2:
The patent replaces conventional mechanical or GPS-based positioning systems with an optical measurement system using laser range finders and reflection devices. This substitution eliminates reliance on satellite signals or complex mechanical positioning mechanisms, achieving higher precision through optical time-of-flight or phase-shift measurements
2Measurement precision
If laser range finder is used to measure relative positions, then the navigation accuracy is improved, but the energy consumption increases due to continuous laser emission and scanning
Solution Approach 1:
The patent implements periodic scanning and tracking operations where the laser range finder alternates between active measurement phases and idle phases. The system performs calibration scans at intervals and uses tracking mode during operation, reducing continuous energy consumption while maintaining positioning accuracy through periodic updates
Solution Approach 2:
The system uses the mobile platform's own motion and the reflection devices as reference markers to self-calibrate and maintain positioning accuracy. The platform leverages its movement through the marked range to automatically update its position relative to reflection devices, reducing the need for frequent active scanning and energy-intensive re-calibration
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
The system achieves enhanced navigation accuracy within centimeters, allowing the mobile platform to operate efficiently and avoid obstacles, improving work efficiency and reducing the need for frequent reflection device replacement.
Implementation Method 1
emitting, by the laser range finder, at least one laser to measure relative positions and distances between the plurality of reflection devices and the movable platform
Implementation Method 2
a laser range finder... emitting, by the laser range finder, at least one laser to measure relative positions and distances
Implementation Method 3
a plurality of reflection devices... emitting, by the laser range finder, at least one laser to measure relative positions and distances between the plurality of reflection devices and the movable platform
Data Source
AI summary
A method for navigation of a movable platform is provided. The method includes the steps. First, a plurality of reflection devices is placed to mark a range. A coordinate location and a direction of the movable platform are received by a positioning system, At least one laser to measure relative positions and distances between the reflection devices and the movable platform are emitted by a laser range finder, respectively. Absolute locations of the reflection devices and the range are calculated by a processor according to the coordinate location and the direction of the movable platform, the relative positions and the distances between the reflection devices and the movable platform. The reflection devices are scanned and tracked by the processor, and the coordinate location and the direction of the movable platform and the absolute locations are calibrated by the processor to control the movable platform to move in the range.