Vehicle Access Control System Energy Consumption Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Access control systems for vehicles consume high energy due to regular interrogation signals, reducing battery life, especially when the vehicle is stationary for extended periods.
Innovation Solution
An access control system with a sensor device that detects user or ID transmitter approaches, switching from a deactivation to an activation state only when proximity is detected, reducing unnecessary energy usage by generating detection signals only when necessary, and using low-energy detection methods like NFC and Bluetooth Low Energy for authentication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If regular query signals are sent to detect ID transmitter, then detection reliability is improved, but energy consumption increases
Solution Approach 1:
The system implements periodic query signals at specific intervals instead of continuous transmission. The control unit is configured to send query signals only at predetermined time intervals, allowing the system to maintain detection capability while significantly reducing energy consumption during vehicle downtime.
Solution Approach 2:
The system dynamically adjusts its detection behavior based on vehicle state. When the vehicle is moving, regular query signals are sent for reliable detection. When parked, the system reduces query frequency or enters low-power mode, adapting the detection strategy to current operational requirements.
2Measurement precision
If detection means is continuously activated, then detection precision is improved, but energy consumption increases
Solution Approach 1:
The detection system is divided into multiple operational states: a low-power standby mode and an active detection mode. The detection means remains in standby mode during vehicle downtime, consuming minimal energy, and transitions to active mode only when a user approach is detected or the vehicle is in operation.
Solution Approach 2:
A preliminary detection stage uses a low-power detection means to detect user approach in a near area before activating the full detection system. This preliminary action allows the system to prepare for accurate authentication only when necessary, reducing overall energy consumption while maintaining detection precision when needed.
3Area of stationary object
If detection range is extended, then detection capability is improved, but energy consumption increases
Solution Approach 1:
The detection space is segmented into a near area and a detection range area. The near area is monitored by a low-power detection means that detects user approach, while the detection range is monitored by the main detection means that consumes more energy. This segmentation allows the system to maintain extended detection capability while managing energy consumption through selective activation.
Solution Approach 2:
The low-power detection means acts as an intermediary between the user and the main detection system. It detects user approach in the near area and triggers the main detection means to activate only when needed, serving as a energy-efficient mediator that enables extended detection range without continuous high energy consumption.
Data Source
Figure 1~2
Figure 3a~4
Figure 5a~5b
AI summary
The invention relates to an access control system (10) for a vehicle (1) comprising a sensor device (20) with a detection means (22) for detecting an approach (90) in a near-field (32) of the vehicle (1) and a recognition means (21) for recognizing the approach (90) in a detection area (33) of the vehicle (1). The invention further relates to a vehicle (1) and a method (100) for recognizing a request for access to a vehicle (1).