Smart Entry System Door Unlock Logic
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Solution Overview
Problem
The existing smart entry systems impose a heavy operation load on operators and passengers due to the complexity of unlocking all doors, requiring multiple operations and waiting for the driver to unlock passengers' doors manually.
Innovation Solution
A smart entry system with a driver's door unlock detector, passenger's door open operation detector, and a communication establishment detector, utilizing a controller with a timer unit to unlock doors based on driver and passenger operations, allowing all doors to be unlocked with a single operation by the driver after a passenger initiates their door unlock, reducing the need for additional manual operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the driver's door and passengers' doors are unlocked by operating multiple operation sections (touch sensor and mechanical switch) or operating the mechanical switch multiple times, then all doors can be unlocked, but the operation load on the operator increases and operability deteriorates
Solution Approach 1:
The system performs preliminary detection of the passenger door open operation and starts a timer before the driver's door unlock operation is completed. This preliminary action allows the system to automatically unlock passenger doors if the driver attempts to open their door within the predetermined time period, eliminating the need for the driver to perform additional operations to unlock passenger doors.
Solution Approach 2:
The unlocking system serves itself by automatically detecting the driver's intent to open the door and autonomously unlocking the passenger doors based on the timer condition. The system uses the driver's own door open operation as the trigger, requiring no separate action from the driver to unlock passenger doors, thus reducing operational complexity.
2Reliability
If the passengers' doors are not unlocked in the initial unlocking operation for security reasons, then security is improved, but the waiting time for passengers increases and productivity deteriorates
Solution Approach 1:
The system performs preliminary detection of the passenger door open operation and starts a timer before the driver's door unlock operation is completed. This preliminary action allows the system to automatically unlock passenger doors if the driver attempts to open their door within the predetermined time period, eliminating the need for the driver to perform additional operations to unlock passenger doors.
Solution Approach 2:
The unlocking system dynamically adjusts its behavior based on the timing of operations. Initially, only the driver's door is unlocked to maintain security. However, if the driver attempts to open their door within the predetermined time period after a passenger door open operation is detected, the system dynamically changes to unlock all doors, thereby improving efficiency without compromising initial security.
Data Source
AI summary
A smart entry system includes a smart control unit that detects whether communication with a portable device has been established, and a centralized control unit that unlocks a driver's door when a driver's door unlock operation is detected and establishment of communication with the portable device is detected. The centralized control unit includes a timer unit that measures time when a passenger's door open operation is detected or when a passenger's door open operation is detected and the fact that communication with the portable device has not been established is detected. The centralized control unit unlocks at least one of the passengers' doors along with the driver's door when a driver's door unlock operation is detected and establishment of communication with the portable device is detected while the timer unit is measuring a certain period of time.