Photodiode Sensitivity Damper for LIDAR Eye Safety
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Solution Overview
Problem
Current LIDAR systems face limitations in maximum illumination power due to eye safety regulations, which restrict their performance in detecting far-away objects effectively.
Innovation Solution
A photodiode-based detection module with a sensitivity damper and a controller that temporarily reduces the sensitivity of the photodiode to less than a nominal threshold, enhancing the detection capabilities while maintaining eye safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the illumination power of LIDAR systems is increased to improve detection of far-away objects, then the detection capability is improved, but the eye safety requirement is violated
Solution Approach 1:
The photodiode's sensitivity is dynamically adjusted based on detection needs. The sensitivity damper temporarily reduces sensitivity below nominal threshold when high illumination power is required, allowing the system to switch between high sensitivity mode (for normal detection) and low sensitivity mode (for far-away object detection with high power), thus resolving the contradiction between detection capability and eye safety
Solution Approach 2:
The system changes the sensitivity parameter of the photodiode from its nominal value to a reduced value when detecting far-away objects. This parameter change allows the use of higher illumination power without violating eye safety regulations, as the reduced sensitivity compensates for the increased power, maintaining safe operational levels while improving detection range
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 proposed solution improves the performance of LIDAR systems by enhancing their ability to detect far-away objects while ensuring compliance with eye safety regulations.
Implementation Method 1
at least one photodiode for detecting light
Data Source
AI summary
A photodiode-based detection module may include at least one photodiode for detecting light. The photodiode-based detection module may also include a sensitivity damper configured to temporarily reduce the sensitivity of the at least one photodiode. The photodiode-based detection module may further include a controller configured to trigger the sensitivity damper to reduce a sensitivity of the at least one photodiode to less than a nominal sensitivity threshold.