Distributed Vehicle Alarm System with Redundant Secondary Devices
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Solution Overview
Problem
Conventional vehicle alarm systems are vulnerable to disabling and signal blocking, making them ineffective in preventing theft and tracking stolen vehicles, as thieves can easily shield GPS signals, remove batteries, or use signal blockers to evade detection.
Innovation Solution
A distributed vehicle alarm system comprising a primary device connected to the vehicle's electrical system and secondary devices that can adapt and take over functions if the primary device is disabled, using multiple communication frequencies and protocols to remain operational and difficult to detect or block, with secondary devices acting as primary devices if necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a GPS chip is incorporated to transmit vehicle position, then positioning capability is improved, but the system becomes vulnerable to signal blocking and tracking
Solution Approach 1:
The alarm system is divided into multiple independent devices distributed at different locations within the vehicle. Each device has its own GPS receiver and communication capabilities, so if one device is blocked or disabled, others can continue providing positioning information. This segmentation eliminates the single point of failure vulnerability.
Solution Approach 2:
The system transitions from using a single centralized GPS antenna to multiple distributed GPS receivers throughout the vehicle. This spatial distribution across different dimensions makes it difficult for thieves to block all signals simultaneously, as they would need to access multiple locations within the vehicle.
2Reliability
If the alarm system uses a centralized primary device connected to the vehicle electrical system, then power supply is reliable, but the system becomes easy to disable by cutting power or removing the device
Solution Approach 1:
The alarm system is segmented into multiple independent devices, each with its own power management. Secondary devices are not connected to the vehicle electrical system and use internal batteries, making them independent of the vehicle's power state. This segmentation prevents a single point of power disruption from disabling the entire system.
Solution Approach 2:
Different devices have different power supply characteristics tailored to their specific needs and locations. Primary devices leverage the vehicle's electrical system when available, while secondary devices use independent battery power. This local adaptation of power supply strategies optimizes both reliability and resistance to disabling.
3Reliability
If multiple communication frequencies are used, then communication reliability is improved, but device complexity increases
Solution Approach 1:
The communication functionality is segmented across multiple devices rather than concentrated in one complex unit. Each device handles a subset of communication tasks using appropriate frequencies for its location and function, reducing individual device complexity while maintaining overall system reliability through diversity.
4Adaptability or versatility
If secondary devices are distributed throughout the vehicle and can act as primary devices, then system adaptability is improved, but device complexity and difficulty of installation increase
Solution Approach 1:
The alarm system dynamically adjusts its operational configuration based on the status of individual devices. Any secondary device can automatically assume the role of primary device if needed, creating a flexible, adaptive system that responds to changing conditions without requiring complex manual reconfiguration.
Data Source
AI summary
A vehicle alarm system comprising a primary device and at least one secondary device. The primary device is adapted to be connected to the vehicle and the secondary device is adapted to not be connected to the vehicle but adapted to be arranged in the vehicle, wherein the secondary device is adapted to take the role of the primary device if the primary device is disabled or removed from the vehicle.