Smart Alarm Module Reducing Wiring Complexity via CAN Bus Integration
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Solution Overview
Problem
Conventional automobile security systems require complex wiring setups, increasing labor costs and complication in troubleshooting due to the numerous electrical devices they need to connect, which can be cumbersome and inefficient.
Innovation Solution
A smart alarm module that integrates with a vehicle's CAN bus and uses a microcontroller to manage arm and disarm modes via a remote controller, featuring a sensor for detecting shock waves and an audio device for alerts, reducing the number of necessary connections to just five wires by utilizing the vehicle's existing electrical infrastructure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional security systems connect to multiple electrical devices (siren, starter, ignition, door locks, lights), then comprehensive security coverage is achieved, but wiring complexity and installation difficulty increase significantly
Solution Approach 1:
The patent utilizes the CAN bus as a universal communication infrastructure that replaces multiple dedicated wiring connections. The microcontroller communicates with various security components (siren, door locks, lights, starter) through standardized CAN messages, allowing one communication bus to serve multiple functions that previously required separate wiring harnesses
Solution Approach 2:
The patent replaces the mechanical/electrical wiring system with an electronic communication system. Instead of physical wire connections between the microcontroller and each security component, digital signals are transmitted through the CAN bus protocol, substituting traditional electrical wiring with software-based communication
2Reliability
If conventional security systems use multiple wiring connections to various components, then complete system functionality is achieved, but labor costs and installation time increase
Solution Approach 1:
The CAN bus serves as a universal communication backbone that enables the security system to interface with multiple vehicle components through a single standardized connection point, dramatically reducing the number of individual wiring connections installers must make while preserving complete system functionality
Solution Approach 2:
The patent segments the security system into modular components (microcontroller, sensor module, output devices) that communicate through standardized CAN bus interfaces. This modular architecture allows for easier installation and troubleshooting, as each module can be independently connected and tested
3Reliability
If conventional security systems are always on and connected to the battery, then immediate response to security events is achieved, but power consumption increases continuously
Solution Approach 1:
The microcontroller employs periodic sampling of sensor inputs and periodic status updates on the CAN bus rather than continuous monitoring and communication. The system checks sensor states at defined intervals and transmits status information periodically, reducing power consumption while maintaining adequate security monitoring coverage
Solution Approach 2:
The system uses feedback mechanisms where the microcontroller monitors sensor inputs and only activates alarm outputs when specific threshold conditions are met. The CAN bus communication provides feedback about system status and sensor readings, allowing the microcontroller to enter low-power states when no security events are detected
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
Simplifies the installation and operation of vehicle security systems by reducing wiring complexity, allowing for efficient integration with existing vehicle systems and providing effective alarm functionality with fewer connections, thus lowering installation costs and improving troubleshooting ease.
Implementation Method 1
a sensor adapted to quantized shock waves applied to the vehicle and to feed a first activating signal to the microprocessor when the quantized values exceeds a predetermined value
Data Source
AI summary
A smart alarm module includes a connector terminal adapted to provide not more than five conductive paths from a fused box and an audio device of the vehicle to the smart alarm module, a CAN bus interface adapted to make connection to the CAN bus of the vehicle to detect communication protocol, a microcontroller adapted to arm the smart alarm module in response to the information received from the remote controller to provide the smart alarm module judgment operation based on the received information, a sensor adapted to quantized shock waves applied to the vehicle and to feed a first activating signal to the microprocessor when the quantized values exceeds a predetermined value, a power supply regulator providing power to the CAN bus interface, microprocessor, and sensor of the smart alarm module, and an output interface adapted to sound the audio device in response to output signal from the microprocessor.