Smart Power Supply Interface for Vehicle Electronic Components
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Solution Overview
Problem
Aftermarket vehicle-mounted electronic components powered by cigarette lighters face issues such as limited functionality when the vehicle is stopped, false triggers due to varying sensor conditions, and potential battery over-discharge from static current variations, necessitating a solution for steady power supply and accurate status determination.
Innovation Solution
A vehicle-mounted electronic component with a smart power supply interface module connected to vehicle lines, CAN bus, and sensing modules, allowing for independent operation, accurate ignition and door status monitoring, and battery capacity management to prevent battery depletion, enabling continuous functionality and reducing false triggers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If aftermarket vehicle-mounted electronic components are powered by cigarette lighters without independent power sources, then the components can be installed in various vehicle models, but the components cannot operate continuously after the vehicle is stopped and may cause false triggers
Solution Approach 1:
The patent introduces a smart power supply interface module as an intermediary between the vehicle's power system and the electronic component. This module includes a microcontroller that intelligently manages power distribution, enabling the component to operate independently of the ACC signal while maintaining accurate detection of vehicle status through multiple sensing channels, thereby resolving the contradiction between versatility and reliability
Solution Approach 2:
The smart power supply interface module performs multiple functions: it provides continuous power supply independent of ACC, accurately detects vehicle ignition status through multiple sensors, monitors door lock status, and manages battery capacity. This multi-functionality allows the component to work reliably across different vehicle models without being constrained by specific power supply configurations
2Measurement precision
If the trigger threshold is switched to low when the vehicle is not started, then the G-sensor can detect collisions, but false triggers occur easily due to inaccurate vehicle status determination
Solution Approach 1:
The system uses feedback from multiple vehicle status sensors (ignition status sensor, door lock status sensor) to dynamically adjust the G-sensor trigger threshold. When the ignition status sensor indicates the vehicle is running, the threshold is set to a higher value to prevent false triggers; when the vehicle is stopped, the threshold is lowered to improve collision detection sensitivity, thus resolving the contradiction between detection sensitivity and false trigger rate
Solution Approach 2:
The trigger threshold is made dynamic rather than static, automatically adjusting based on real-time vehicle status detection. The microcontroller continuously monitors ignition status and door lock status, and accordingly adjusts the G-sensor threshold to match the appropriate operating condition, eliminating false triggers while maintaining detection accuracy
3Duration of action of stationary object
If the vehicle-mounted electronic component operates continuously with static current, then it can provide protection functions after the vehicle is stopped, but it may over-discharge the vehicle battery
Solution Approach 1:
The system implements periodic action by putting the electronic component into deep sleep mode when battery capacity falls below a threshold value. The microcontroller monitors battery capacity through the power supply interface module, and when depletion is detected, it automatically transitions the component to a low-power state, allowing continuous operation while preventing battery over-discharge
Solution Approach 2:
The system performs self-service by autonomously monitoring its own power consumption and battery capacity status. The microcontroller and power supply interface module work together to detect battery capacity and automatically adjust the operating state (normal operation or deep sleep mode) without external intervention, ensuring continuous protection functions while preventing energy depletion
Data Source
AI summary
A vehicle-mounted electronic component with a smart power supply interface includes a smart power supply interface module and a component function module. At the vehicle-side, the smart power supply interface module is connected with the vehicle fuse fox and with the CAN bus of the vehicle, and also is connected with the vehicle transmission gear and the vehicle-mounted sensing module respectively. At the component-side, the smart power supply interface module has an ACC output interface and an ACC enhanced output interface for the gating connection of the ACC interface of the component function module.