Scanning Module Notch Design for Vibration Reduction
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Solution Overview
Problem
Existing mechanical distance measuring devices face efficiency reduction due to vibrations caused by high-speed motors used for laser scanning, leading to decreased accuracy in three-dimensional spatial scanning and distance measurement.
Innovation Solution
A distance measuring device incorporating a scanning module with a rotor assembly and optical elements, where the optical elements rotate synchronously with the rotor, and a notch is formed on the rotor or optical element to reduce vibration, allowing for stable and accurate distance measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a high speed motor is used to deflect and scan the light path, then the scanning speed and three-dimensional spatial scanning capability are improved, but the vibration of the distance measuring device increases
Solution Approach 1:
The patent applies reverse vibration principle by generating a counter-vibration signal that opposes the vibration caused by the high-speed motor. The vibration sensor detects the actual vibration, and the counter-vibration generator produces an opposing vibration to cancel out the harmful effects, allowing the high-speed motor to operate at full speed without compromising measurement stability
Solution Approach 2:
The patent implements a feedback control system where a vibration sensor continuously monitors the vibration generated by the high-speed motor during scanning operations. This vibration information is fed back to a control system that adjusts the counter-vibration generation in real-time, creating a closed-loop system that dynamically compensates for vibration effects while maintaining high scanning speed
2Productivity
If a high speed motor is used to deflect and scan the light path, then the utilization efficiency of laser emitting and receiving element conditions is improved, but the distance measuring efficiency decreases due to vibration
Solution Approach 1:
The patent introduces a vibration sensor and counter-vibration generator as intermediary components between the high-speed motor and the distance measuring function. These intermediaries detect and compensate for vibration effects, allowing the motor to operate at high speed for improved utilization efficiency while the counter-vibration mechanism ensures measurement reliability is maintained
Solution Approach 2:
The patent replaces pure mechanical coupling between the motor and scanning system with a hybrid system that incorporates active vibration compensation. Instead of relying solely on mechanical stability, the system uses sensors and control mechanisms to actively counteract vibration, substituting passive mechanical design with active control to maintain reliability during high-speed operation
Data Source
AI summary
A distance measuring device includes a scanning module including a rotor assembly, the rotor assembly including a rotor, the rotor including a receiving cavity and an optical element disposed in the receiving cavity, the optical element rotating synchronously with the rotor assembly, the optical element including a first end and a second end, the first end and the second end being respectively positioned at two ends in a radial direction of the optical element, a thickness of the first end being greater than a thickness of the second end, a notch being formed on a side of the first end of the rotor or/and the optical element; and a distance measuring module configured to emit a laser pulse to the scanning module.