Dynamic Reception Range Varying System for Keyless Entry Battery Conservation
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Solution Overview
Problem
Existing vehicle control systems with keyless entry or passive entry systems face inefficiencies in battery life due to unnecessary signal responses from portable devices when they are outside the execution range, leading to wasteful battery consumption.
Innovation Solution
A reception range varying system that includes a vehicle control device and a portable device, where the reception range is adjustable based on the device's position, narrowing the range when the portable device is within the reception range but outside the execution range to reduce unnecessary signal responses and conserve battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the reception range is kept wide to ensure the portable device can receive signals, then the device can maintain communication capability, but unnecessary signal responses occur when the device is outside the execution range, leading to increased battery consumption
Solution Approach 1:
The reception range is made dynamic rather than static. The system continuously adjusts the reception range based on the portable device's position relative to the execution range. When the device is within the execution range, the reception range remains wide; when outside, it narrows automatically. This dynamic adjustment ensures reliable communication when needed while reducing battery consumption when the device is not in the operational zone.
Solution Approach 2:
The system changes the reception range parameter based on the device's position. By monitoring whether the portable device is within the execution range and adjusting the reception range parameter accordingly, the system optimizes the balance between maintaining signal reception capability and reducing unnecessary battery consumption from signal responses outside the operational area.
2Use of energy by moving object
If the reception range is narrowed to reduce battery consumption, then unnecessary signal responses are reduced, but the device may be incorrectly positioned outside the reception range when it should be within the execution range
Solution Approach 1:
The system employs feedback mechanisms to continuously monitor the portable device's position and the reception range status. When the device approaches the execution range or the reception range needs adjustment, the system receives feedback about the current state and makes appropriate adjustments. This feedback loop ensures that the reception range is narrowed only when appropriate, maintaining position detection accuracy while reducing battery consumption.
Solution Approach 2:
The system performs preliminary actions by proactively adjusting the reception range before the portable device actually enters or leaves the execution range. By anticipating position changes and pre-adjusting the reception range, the system prevents incorrect positioning scenarios while minimizing unnecessary signal responses, thus balancing reliability and battery consumption.
3Use of energy by moving object
If the system continuously monitors device position to adjust reception range, then the reception range can be optimized, but the system complexity increases
Solution Approach 1:
The system segments the monitoring and control functions into distinct modules. Position monitoring, reception range calculation, and signal response control are separated into independent functional segments. This segmentation allows each module to perform its specific task efficiently without requiring the entire system to be overly complex, making the overall system more manageable while achieving optimal battery consumption.
Solution Approach 2:
The system implements self-service mechanisms where the portable device and vehicle control device automatically exchange position information and autonomously adjust the reception range without requiring external intervention or complex centralized control. Each device serves itself by processing local information and making adjustments, reducing the overall system complexity while maintaining optimized battery consumption.
Data Source
AI summary
A reception range varying system includes a vehicle control device and a portable device. The reception range varying system determines whether a position where the portable device exists is within an execution range which enables execution of vehicle control over the portable device, or within a reception range but outside the execution range, and narrows the reception range so that the portable device is positioned outside the reception range while maintaining the reception range at a size equivalent to or larger than the execution range, on the basis that the position where the portable device exists is within the reception range but outside the execution range.