Vehicle Audio Boot Time Reduction via Vibration Trigger
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Solution Overview
Problem
Audio/video electronic equipment in vehicles, such as multimedia car radios, face a significant delay in becoming fully operational after power-up due to the boot time of the operating system, which is inconvenient for drivers and leads to excessive power consumption when left on, especially during long vehicle inactivity periods.
Innovation Solution
Incorporating a vibration sensor that initiates the boot process of the operating system when the vehicle is entered, without activating the lighting, and automatically powers off if the vehicle is not started within a predetermined time, reducing the overall boot time and minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the operating system is stored in external memory and loaded at power-up, then the equipment can be fully powered off to save battery, but the boot time becomes excessively long (20-30 seconds)
Solution Approach 1:
The system performs preliminary boot operations in the background before the driver actually needs the equipment. When vibration detecting means detect that the driver is approaching or entering the vehicle, the CPU starts loading the operating system from external memory into RAM in advance, so that by the time the driver sits down and activates the equipment, the OS is already loaded or nearly loaded, dramatically reducing the perceived wait time while still allowing full power-off for battery conservation.
2Ease of operation
If the equipment is left permanently powered on to avoid boot time, then immediate operation is possible, but the battery discharges during long vehicle inactivity
Solution Approach 1:
Instead of continuous operation, the system uses periodic background actions triggered by specific events. The vibration detecting means periodically monitors for driver approach, and when detected, triggers a periodic boot sequence. This allows the equipment to remain powered off during long inactivity periods, conserving battery, while still providing near-immediate operation when needed by triggering the boot process in advance of actual use.
3Reliability
If the operating system is rebooted systematically at each contact key operation, then erratic behaviors are avoided, but the equipment is not immediately available after short stops
Solution Approach 1:
The system performs the necessary reboot action in advance of when it is actually needed. By detecting driver approach through vibration sensors, the system triggers the OS reboot sequence before the driver enters the vehicle, so that the reboot completes during the driver's approach time rather than during the stop period. This maintains system stability through regular reboots while eliminating the perceived wait time after short stops.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution significantly reduces the time it takes for the equipment to become fully operational upon driver entry and ensures the system is rebooted systematically, while preventing excessive power consumption during vehicle inactivity, enhancing user convenience and battery life.
Implementation Method 1
a sensor (20) operable for producing a triggering signal upon detection of a vibration
Data Source
AI summary
The equipment comprises a digital processor implementing an operating system requiring a previous boot before the equipment is in an operational state. A start module is operable, when the device is initially in a power-off state, for: producing a triggering signal upon detection (32) of a vibration by a sensor incorporated in the equipment, and activating (34) the processing means so as to initiate the boot of the operating system, but without activating the lighting means of a front display of the equipment, and finally activating these lighting means upon reception (36) of a vehicle start signal.