Vehicle Door Lock Control Power Management
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Solution Overview
Problem
Existing door lock control devices consume excessive power and emit radiation due to constant power supply to sensors, affecting other vehicle circuits and increasing power consumption.
Innovation Solution
A door lock control device that only supplies power to the operation reception unit when necessary, determined by the vehicle's power source status and occupant presence, using a power supply control unit to manage power to the lock and unlock sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electric power is constantly supplied to lock control sensors, then the sensors can continuously detect touch operations for door locking/unlocking, but a large amount of power is consumed from the vehicle power source
Solution Approach 1:
The power supply to the operation reception unit is controlled periodically rather than continuously. The control unit determines whether to supply power based on periodic evaluation of vehicle conditions (power source state and occupant presence), thereby reducing overall power consumption while maintaining sensor functionality when needed.
Solution Approach 2:
The power supply state of the operation reception unit is made dynamic rather than static. The system adapts the power supply status based on changing vehicle conditions - supplying power when the vehicle is off or no occupant is present, and stopping power supply when the vehicle is on and an occupant is present, thus optimizing energy usage according to operational context.
2Reliability
If electric power is constantly supplied to lock control sensors, then the sensors remain operational, but radiation is constantly emitted from the sensor circuit which can adversely affect other circuits or antenna
Solution Approach 1:
The operation reception unit is powered periodically based on vehicle conditions rather than continuously. By evaluating the power source state and occupant presence at intervals, the system activates the sensor circuit only when necessary, thereby reducing continuous electromagnetic radiation and its potential interference with other vehicle circuits and antenna systems.
Solution Approach 2:
The harmful effect of continuous radiation is eliminated by extracting the operation reception unit from constant power supply. The control unit separates the operational periods from non-operational periods, removing the unnecessary radiation component while preserving the sensor's ability to function when actually needed.
3Use of energy by moving object
If power supply to the operation reception unit is stopped when the vehicle power source is ON and an occupant is present, then unnecessary power consumption is reduced, but the sensor must be quickly reactivated when needed
Solution Approach 1:
The control unit maintains awareness of vehicle conditions (power source state and occupant presence) in advance, making proactive decisions about power supply. This preliminary monitoring ensures that when conditions change and power is needed, the system can quickly restore power supply without delay, as the decision logic is already prepared and waiting.
Data Source
AI summary
A door lock control device that performs locking and/or unlocking of a door of a vehicle subject to a condition that a result of communication with a portable device has authenticated the portable device. The door lock control device has: an operation reception unit that is provided in the vehicle and receives an input for instructing the locking and/or unlocking of the door; a vehicle power source determination unit that determines whether a power source of the vehicle is ON; an occupant determination unit that determines whether an occupant is present in a cabin of the vehicle; and a power supply control unit that stops power supply to the operation reception unit when determination is made that the power source of the vehicle is ON and an occupant is present inside the vehicle cabin.