Stop Lamp Controller Relay Durability
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Solution Overview
Problem
Existing stop lamp lighting controllers are defective in distinguishing between gentle and sudden braking, leading to unnecessary turning on and off, and have insufficient relay durability due to frequent operation.
Innovation Solution
A stop lamp lighting controller with a dual relay system and state judging mechanisms that differentiate between gentle and sudden braking, reducing relay wear by only energizing during sudden braking and using a subline for backup in case of main line failure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the stop lamp is automatically turned on and off during gentle braking, then the braking information is displayed to following vehicles, but the relay durability deteriorates due to frequent operation
Solution Approach 1:
The patent applies parameter changes by monitoring braking intensity through acceleration sensor data and selectively controlling stop lamp activation based on whether braking exceeds a predetermined threshold. During gentle braking below the threshold, the stop lamp remains off to preserve relay durability, while during sudden braking above the threshold, the stop lamp activates to provide braking information to following vehicles.
2Loss of information
If the stop lamp is turned on during gentle braking, then braking information is provided to following vehicles, but unnecessary turning on and off occurs
Solution Approach 1:
The system changes the parameter of stop lamp activation status based on braking intensity parameters. By comparing actual braking intensity against a threshold value, the system determines whether to activate the stop lamp, thereby preventing unnecessary activation during gentle braking while ensuring proper information display during sudden braking events.
3Reliability
If a single relay is used for stop lamp control, then the device complexity is low, but the reliability is insufficient due to no backup
Solution Approach 1:
The patent implements beforehand cushioning by providing a backup relay alongside the main relay in the stop lamp control circuit. This redundant relay remains standby and can take over control functions if the main relay fails, ensuring continuous stop lamp operation and maintaining lighting functionality without interruption.
Solution Approach 2:
The control system applies local quality by differentiating between gentle braking and sudden braking conditions, and selectively controlling stop lamp activation only during sudden braking. This localized control approach ensures that the stop lamp provides necessary information during critical events while avoiding unnecessary activation during normal gentle braking, thereby balancing information display needs with relay durability preservation.
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 system effectively reduces unnecessary stop lamp activation, prolongs relay lifespan, and ensures continuous lighting functionality while maintaining traffic safety.
Implementation Method 1
a relay that is normally in a de-energized state and switches to an energized state in response to a braking operation
Data Source
AI summary
The invention provides a stop lamp lighting controller able to improve durability of a relay while unnecessary automatic turning on and off are avoided. A stop lamp is lit through a main line at a gentle braking time. At a sudden braking time, the stop lamp is switched on and off by disconnecting and connecting the main line in a predetermined period. At a breakdown time of the main line, the main line is switched to a subline and a lighting function of the stop lamp is secured. The main line is formed when both a first relay and a second relay are in a de-energizing state. The main line is disconnected and connected by periodically opening and closing the first relay. The main line is switched to the subline by energizing the second relay.