Traffic Light Detection System for Driver Start Alerts
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Solution Overview
Problem
Existing motor vehicle systems fail to reliably remind drivers of changes in traffic light signals, leading to unnecessary standstill times due to incorrect detection and lack of driver attention.
Innovation Solution
A method and apparatus that detect light signals using image data records, generate stop and start signals based on traffic light changes, and transmit these signals to output devices, ensuring the driver is alerted through visual, audible, or haptic means, with a confidence value verification to ensure accurate detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the driver assistance system uses image processing to detect light signals, then the driver is reminded of traffic light changes, but the detection reliability is insufficient leading to false negatives and unnecessary standstill times
Solution Approach 1:
The system performs preliminary detection of the vehicle's stop state using multiple sensors (odometer, wheel speed sensors) before initiating light signal detection. This preliminary action ensures the system is ready to detect traffic light changes immediately when the vehicle stops, reducing detection delays and unnecessary standstill times.
Solution Approach 2:
The system continuously monitors light signals and provides feedback to the driver through reminders when green light changes occur. This feedback mechanism ensures the driver is promptly informed of traffic light changes, preventing unnecessary standstill times caused by missed signals.
2Reliability
If the system continuously monitors light signals to ensure accurate detection, then driver awareness is improved, but energy consumption increases
Solution Approach 1:
The system uses periodic action by evaluating image data records at defined intervals rather than continuously. The light signal detection is triggered periodically when the vehicle is in stop state, and the system evaluates further image data records at subsequent intervals to detect light signal changes, reducing energy consumption while maintaining detection accuracy.
Solution Approach 2:
The system performs preliminary evaluation of image data records to determine vehicle stop state before initiating continuous light signal monitoring. This preliminary check ensures the system only activates energy-intensive monitoring when necessary (when the vehicle is stopped), optimizing energy usage.
3Reliability
If the system uses multiple sensors and image data evaluation to verify light signal detection, then false positives are reduced, but device complexity increases
Solution Approach 1:
The system segments the detection process into distinct functional modules: vehicle stop state detection (using odometer and wheel speed sensors), light signal detection (using camera/image processing), and reminder generation. This segmentation allows each module to be optimized independently and simplifies the overall system architecture by clearly defining boundaries between functions.
Solution Approach 2:
The system uses multi-functionality by employing the image processing device for multiple purposes: detecting traffic light signals, determining vehicle stop state, and providing visual feedback to the driver. This universal approach reduces the need for separate dedicated sensors and systems, thereby reducing overall device complexity while maintaining detection accuracy.
Data Source
AI summary
A method for reminding a driver of a motor vehicle to start at a light signal device, includes the following steps: detecting a light signal of a light signal device by evaluating an image data set; detecting the stationary state of the motor vehicle according to the motor vehicle operating parameters; producing a stop signal when the detected light signal is a stop light signal and when the motor vehicle is stationary; in the presence of the stop signal, generating a start signal when a switch to a drive light signal is detected by evaluating an additional image data set, and transferring the start signal via an interface to an output device.