Laser Range Sensor Coded Disc Speed Control
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Solution Overview
Problem
Existing laser range finding sensors with multiple rotators increase manufacturing and maintenance costs due to complex structures and increased components, while they struggle to maintain precise rotation speed for accurate distance measurement.
Innovation Solution
A laser range finding sensor with a motor, control box, and coded disc that uses a photoelectric encoder to automatically adjust the rotation speed of the motor, ensuring precise control and maintaining a constant speed by comparing real-time rotation speed with a preset threshold, thereby simplifying the structure and enhancing sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple rotators are used to detect angle and number of rotation, then the detection precision is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent merges the functions of multiple rotators into a single coded disc with coded patterns. The coded disc integrates angle detection and rotation counting capabilities that were previously distributed across multiple separate rotators, thereby reducing device complexity while maintaining detection precision through the coded pattern recognition system
Solution Approach 2:
The coded disc serves multiple functions simultaneously: it detects rotation angle, counts rotations, and provides speed feedback. This multi-functional component replaces multiple specialized rotators, reducing the overall number of components while achieving the same or better detection capabilities through universal functionality
2Measurement precision
If multiple rotators are used for detection, then the measurement accuracy is improved, but the maintenance cost and difficulty increase
Solution Approach 1:
By combining multiple rotators into a single coded disc system, the patent reduces the number of components that require maintenance. The unified structure with integrated angle and rotation detection eliminates the need to maintain multiple separate rotators, thereby reducing maintenance costs and complexity while preserving measurement accuracy
Solution Approach 2:
The coded disc system incorporates self-diagnostic capabilities through the control unit that monitors the coded patterns. The system can automatically detect and compensate for errors in the coded pattern recognition, reducing the need for external maintenance and calibration while maintaining accurate measurements
3Device complexity
If the rotation speed is not precisely controlled, then the device complexity is reduced, but the measurement accuracy deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the control unit continuously monitors the rotation speed by decoding the coded disc patterns and adjusts the motor speed accordingly. This closed-loop feedback system maintains precise rotation speed control without requiring complex mechanical speed regulation mechanisms, thereby preserving measurement accuracy while keeping device complexity low
Solution Approach 2:
The patent replaces mechanical speed control mechanisms with an electronic control system that uses coded pattern recognition and electronic feedback. This substitution eliminates complex mechanical speed regulators while achieving precise speed control through electronic means, maintaining measurement accuracy with reduced mechanical complexity
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 solution allows for precise distance measurement on a two-dimensional cross section with high sensitivity and a simple structure, reducing costs and improving accuracy by automatically adjusting the motor speed to maintain consistent scanning.
Implementation Method 1
automatically calculating a real-time rotation speed via a photoelectric encoder
Implementation Method 2
detection portion comprises a light transmitter and a light receiver
Data Source
AI summary
Disclosed are a laser range finding sensor and a range finding method therefor. The laser range finding sensor comprises a motor (120), a control box (130), and a coded disc (150). Under a drive of the motor, the control box rotates relative to the coded disc. The coded disc comprises a plurality of range finding teeth (151). The control box comprises a range finding unit (142), a detection portion (144), and a control unit (140). The detection portion comprises a light transmitter (1440) and a light receiver (1441) disposed opposite to each other. The control box rotates relative to the coded disc, so that the range finding teeth pass between respective positions of the light transmitter and the light receiver. The control box rotates under the drive of the motor for scanning and distance measuring and records a measured distance value in the control unit. The control unit automatically calculates a corresponding local rotation speed when the coded disc rotates by a set angle. The control unit is connected to a rotation speed feedback and adjustment unit configured to adjust the rotation speed of the motor so that the control box is rotated at a constant speed. The laser range finding sensor has a simple structure, needs a low cost, and has a high sensitivity.