Alternating Vehicle Lighting and Laser Radar Measurement
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Solution Overview
Problem
The detection ability of a laser radar apparatus is reduced due to noise interference from visible light emitted by the lighting apparatus, which affects its ability to accurately measure distances.
Innovation Solution
A controller is used to alternate the operation of the lighting device between a first emission mode and a second emission mode, interrupting or reducing visible light emission during distance measurement to minimize interference, and adjusting the duration of these modes to ensure driver visibility while improving laser radar performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the lighting device operates in the first emission mode to emit visible light continuously, then the driver's visibility is ensured, but the detection ability of the laser radar apparatus is reduced due to noise interference
Solution Approach 1:
The lighting device alternates between a first emission mode (emitting visible light) and a second emission mode (reducing or stopping emission). The laser radar apparatus performs distance measurements during the second emission mode when visible light emission is reduced, thereby reducing noise interference and improving detection ability while maintaining periodic visibility for the driver
2Measurement precision
If the lighting device stops emission of visible light to improve laser radar detection, then the detection ability is improved, but the driver's visibility is compromised
Solution Approach 1:
The system uses periodic alternation between emission modes, where the lighting device emits visible light during the first mode to ensure driver visibility, then switches to the second mode to reduce emission and enable accurate laser radar measurements. This periodic cycling ensures both visibility and detection ability are maintained at appropriate levels
3Ease of operation
If the lighting device emits visible light continuously, then the driver's sight is ensured, but noise interference reduces the accuracy of distance measurements
Solution Approach 1:
The lighting device and laser radar apparatus are controlled to operate in alternating cycles. During the first emission mode, visible light is emitted to ensure driver sight. During the second emission mode, visible light emission is reduced or stopped, allowing the laser radar to perform accurate distance measurements without noise interference from the lighting device
Data Source
AI summary
A combined radar and lighting unit includes a laser radar apparatus, a lighting device, and a controller. The laser radar apparatus is mounted to a vehicle, emits laser light toward an outside of the vehicle, and detects reflected light. The lighting device is mounted to the vehicle and emits visible light toward the outside of the vehicle. The controller controls the lighting device to cause the lighting device to alternately operate in a first emission mode to perform emission of the visible light, and in a second emission mode to stop emission of the visible light or reduce a quantity of the visible light. The controller controls the laser radar apparatus to interrupt the measurement of the distance while the lighting device is operating in the first emission mode, and executes the measurement of the distance while the lighting device is operating in the second emission mode.