Distance-Measuring System Degradation Detection
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Solution Overview
Problem
Distance-measuring systems in vehicles, such as lidar, face degradation issues due to aging effects and defects, leading to reduced luminous flux and potential system malfunctions, which can compromise safety and operational life.
Innovation Solution
A method that involves transmitting a signal, determining the distance and signal strength, and comparing these to initial values to detect degradation, allowing for continuous monitoring and early detection of changes, even outside maintenance intervals, using a transmission unit and receiving unit in the distance-measuring system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If laser diodes are pushed to their limits to achieve high performance in lidar systems, then the measurement precision and power are improved, but the reliability deteriorates due to aging effects and degradation
Solution Approach 1:
The system performs preliminary actions by continuously monitoring degradation parameters (distance to object, received signal strength) and comparing them against initial values stored in memory. This allows early detection of aging effects in laser diodes before they cause complete system failure, enabling preventive maintenance and ensuring reliable operation throughout the system's lifespan.
2Measurement precision
If complex computational operations are performed to detect sensor degradation, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
The invention extracts only the essential parameters needed for degradation detection (distance to object and received signal strength) from the complex sensor data. By focusing on these specific parameters and comparing them against stored initial values, the system achieves accurate degradation detection without requiring complex computational operations, thus reducing device complexity while maintaining measurement precision.
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 method enhances operational safety and durability by enabling timely detection and correction of degradations, improving the reliability and longevity of distance-measuring systems in a cost-effective manner.
Implementation Method 1
a transmission signal of a transmission unit is first transmitted. This transmission signal hits an object and is then back-scattered therefrom and acquired as a received signal by a receiving unit
Data Source
AI summary
A method for detecting a degradation in a distance-measuring system (1.1), comprising the following method steps: transmitting a transmission signal (1.2), acquiring a received signal back-scattered from an object, determining the distance (a) from the object using the received signal, and determining a degree of degradation based on the determined distance (a) from the object and/or the received signal strength of the received signal.