Hands-Free Trunk Opening System Authentication Logic
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Solution Overview
Problem
Existing hands-free systems for opening vehicle trunks lack stability and security, often resulting in unexpected trunk openings and battery discharge, especially when multiple smart keys are present, and do not effectively authenticate user intention.
Innovation Solution
A hands-free system that uses a trunk antenna to transmit sensing and authentication signals, requiring a smart key to respond with authentication information within a predetermined time and area, ensuring secure and stable trunk opening by deleting the hands-free function setting only when authentication is confirmed, and incorporating an alarm function to notify the user.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If hands-free trunk opening is enabled without authentication, then ease of operation is improved, but security and stability deteriorate due to unexpected trunk openings
Solution Approach 1:
The system uses sensing signals to detect the presence of smart keys and continuously monitors authentication responses. The controller receives feedback from multiple smart keys and determines user intention based on this feedback, ensuring that trunk opening only occurs when authentication is confirmed, thus maintaining both ease of operation and reliability
Solution Approach 2:
The system performs preliminary authentication by transmitting sensing signals and receiving authentication responses before enabling trunk opening. This preliminary action verifies user intention and authenticates the smart key, preventing unexpected trunk openings while maintaining hands-free convenience
2Measurement precision
If sensing signal transmission is continuous, then detection accuracy is improved, but energy consumption increases causing battery discharge
Solution Approach 1:
The controller transmits sensing signals periodically rather than continuously, at predetermined intervals. This periodic action maintains adequate detection accuracy for user intention while significantly reducing energy consumption of the smart key battery, resolving the contradiction between measurement precision and energy use
Solution Approach 2:
The system uses the existing communication capability of the smart key for authentication purposes, making the smart key serve dual functions of authentication and energy management. The smart key autonomously manages its battery by responding to periodic sensing signals only when necessary
3Reliability
If authentication is required for trunk opening, then security is improved, but ease of operation deteriorates due to additional steps
Solution Approach 1:
The patent replaces mechanical authentication methods (physical keys, manual locking mechanisms) with electromagnetic field-based wireless authentication using smart keys and sensing signals. This substitution maintains high security through authentication while eliminating the need for manual operations, thus improving ease of operation without compromising security
4Adaptability or versatility
If multiple smart keys are present, then adaptability is improved, but system stability deteriorates due to authentication conflicts
Solution Approach 1:
The system segments the authentication process by individually processing authentication responses from each smart key. The controller determines user intention by analyzing responses from multiple smart keys separately, identifying the primary user based on response timing and patterns, thus maintaining authentication stability while supporting multiple keys
Solution Approach 2:
The system dynamically adjusts authentication behavior based on the presence of multiple smart keys. When multiple keys are detected, the controller modifies its authentication process to identify the primary user through sensing signal response patterns, enabling adaptable authentication that maintains stability in multi-key scenarios
Data Source
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AI summary
A hands-free system and method for opening a trunk, that include a trunk antenna 100 and a smart key 200 that transmits a sensing response signal or an authentication response signal, when receiving a sensing signal or an authentication signal from the trunk antenna 100. In addition, the smart key receives and stores a hands-free function setting and transmits the sensing response signal with function setting information when the hands-free function is set. Further, a receiving antenna 300 receives a sensing response signal or an authentication response signal from the smart key 200. A controller 400 transmits an authentication signal when the trunk antenna 100 transmits a sensing signal during a predetermined period and the receiving antenna 300 receives a sensing response signal that includes function setting information a predetermined number of times. The controller 400 performs authentication when the receiving antenna 300 receives an authentication response signal and outputs a trunk opening signal when the authentication is allowed.