PEPS Key Search Trigger Queue for Lower Power and Reliable Retriggering
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Solution Overview
Problem
The existing Passive Entry Passive Start (PEPS) systems in vehicles face inefficiencies in priority determination, high power consumption, and potential safety hazards due to continuous reacquisition of search trigger sources, which can be lost if functional modules fail.
Innovation Solution
A method and device for vehicle key search that involves obtaining and storing key search trigger sources according to their priorities in arrays, processing them sequentially, and updating triggers to improve efficiency and reduce power consumption, ensuring key search functionality even if modules fail.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the PEPS system continuously receives and re-acquires search trigger sources from multiple modules, then the key search function can be triggered, but the power consumption increases and the processing efficiency decreases
Solution Approach 1:
The system performs preliminary acquisition of search trigger sources from multiple functional modules at the beginning, storing them in a queue. This preliminary action eliminates the need for continuous re-acquisition, thereby reducing power consumption while ensuring the key search function can be reliably triggered when needed.
Solution Approach 2:
The system creates a copy of the search trigger sources and stores them in a queue for subsequent processing. Instead of continuously querying the original modules, the PEPS system processes the copied trigger sources from the queue, reducing the energy burden of continuous communication while maintaining functional reliability.
2Reliability
If the PEPS system continuously re-acquires search trigger sources after each processing, then the key search can be re-triggered, but the processing efficiency decreases and time is lost
Solution Approach 1:
The system maintains a continuous queue of search trigger sources that are pre-acquired from multiple modules. The PEPS system continuously processes these trigger sources from the queue without interruption, eliminating the need to stop and re-acquire triggers after each processing cycle. This continuous processing improves efficiency while maintaining the ability to re-trigger key search operations.
3Device complexity
If the PEPS system selects only the highest priority search trigger source, then the processing is simplified, but other search trigger sources may be lost if not re-acquired
Solution Approach 1:
The system preliminarily acquires and stores all search trigger sources from multiple functional modules in a queue before processing. This preliminary action ensures that all trigger sources are captured and preserved, preventing any loss even if only one is processed at a time. The simplified single-threaded processing can then operate on this pre-prepared queue without risking trigger source availability.
Data Source
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AI summary
A method for searching the vehicle key, which includes sequentially storing the key search trigger sources according to the priorities of the key search trigger sources when the key search trigger source corresponding to at least one function is obtained and the priorities corresponding to the key search trigger sources are obtained, and then the key search trigger sources can be sequentially processed according to the sequence of the key search trigger sources to perform the key search. After the key search trigger sources are received at this time, the key search trigger sources can be stored and processed according to the priorities, which does not require continuous sending and multiple receiving, improving the processing efficiency of the key search trigger sources and reducing power consumption. When other modules fail, the key search can be performed according to the stored key search trigger sources. The normal realization of the vehicle key search function and the safety of the vehicle are ensured. A device for searching vehicle key, a computer-readable storage medium and a vehicle are further proposed.