Laser Receiver Beam Comparison for Reflection Discrimination
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Solution Overview
Problem
Existing methods for comparing a received beam incident on a laser receiver with a rotating laser beam fail to accurately distinguish between rotating laser beams and reflections on a reflecting surface, leading to incorrect measurements.
Innovation Solution
The method involves orienting the rotating laser and laser receiver components parallel or perpendicular to the gravitational direction, using an evaluation unit to determine the adjustment direction of the received beam relative to the laser receiver, and comparing it with the tripod's height direction to differentiate between rotating laser beams and reflections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If modulation signal is used to identify rotating laser beams, then the risk of incorrect measurements is reduced, but reflected laser beams are incorrectly categorized as rotating laser beams
Solution Approach 1:
The detection field is segmented into multiple photo-detector arrays with different spatial orientations. Each array evaluates the received beam independently, and the combination of evaluation results from multiple arrays enables distinction between direct rotating laser beams and reflected beams based on their different spatial characteristics.
Solution Approach 2:
The patent adds a spatial dimension to beam identification by using multiple photo-detector arrays arranged in different orientations. Instead of relying solely on temporal modulation characteristics, the system evaluates the spatial distribution and orientation of the received beam across multiple arrays to distinguish between direct and reflected beams.
2Measurement precision
If quotient comparison method is used to categorize beams, then extraneous beams can be distinguished, but reflected laser beams cannot be detected
Solution Approach 1:
The patent merges the quotient comparison method with spatial evaluation from multiple photo-detector arrays. The final beam categorization combines both the amplitude ratio information (quotient) and the spatial orientation information from multiple arrays, enabling simultaneous detection of extraneous beams and reflected beams.
Solution Approach 2:
The multiple photo-detector arrays serve as intermediaries that provide additional spatial information about the received beam. By evaluating the beam's characteristics from multiple spatial perspectives, the system can identify reflected beams that would otherwise be indistinguishable from direct beams using quotient comparison alone.
3Device complexity
If standard components are used without special equipment, then device complexity is reduced, but the ability to distinguish reflections from rotating laser beams is limited
Solution Approach 1:
The patent makes the existing laser receiver perform multiple functions by utilizing multiple photo-detector arrays already present in the device. The same arrays used for height measurement are also used for beam identification and reflection detection, eliminating the need for separate specialized equipment while maintaining high measurement precision.
Solution Approach 2:
The laser receiver uses its own existing detection field and photo-detector arrays to perform beam identification and reflection detection. The system leverages its inherent spatial resolution capabilities to distinguish between different beam types without requiring external辅助设备 or special equipment.
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 effectively detects reflections and distinguishes between rotating laser beams and non-rotating extraneous beams, reducing the risk of incorrect measurements by utilizing standard components without requiring special equipment.
Implementation Method 1
The laser receiver comprises an evaluation unit and at least one detection field having a longitudinal direction and a transverse direction
Data Source
AI summary
A method for comparing a received beam incident on a laser receiver in a longitudinal arrangement with a rotating laser beam which is moved by a rotating laser in a horizontal position about an axis of rotation, where the laser receiver includes an evaluation unit and a detection field having a longitudinal direction and a transverse direction, includes disposing the rotating laser on a tripod adjustable along an axis and the horizontal laser plane that the rotating laser beam produces is moved by the tripod in a height direction along the axis. In the longitudinal direction of the detection field, the evaluation unit determines an adjustment direction of the received beam relative to the laser receiver, and the evaluation unit compares the adjustment direction of the received beam with the height direction of the tripod.