Piezoelectric Sensor Enclosure Theft Detection
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Solution Overview
Problem
Autonomous vehicle sensors, encased in an enclosure for ease of transfer, are vulnerable to theft due to their external placement, which is costly and inefficiently secured using conventional methods.
Innovation Solution
The use of piezoelectric sensors to measure torque values of mechanical coupling devices securing the enclosure to a fixture, allowing for real-time monitoring and alert generation upon unauthorized removal or tampering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional security methods (manual patrols, fencing) are used to protect autonomous vehicle sensors, then security coverage is provided, but cost and operational efficiency deteriorate
Solution Approach 1:
The patent replaces mechanical security systems (fencing, manual patrols) with electronic sensing systems. Piezoelectric sensors detect pressure changes on the enclosure surface, and GPS tracking monitors location, substituting physical security infrastructure with electronic detection mechanisms that reduce operational complexity and cost.
Solution Approach 2:
The security system performs self-monitoring through automated pressure detection and alert generation. The piezoelectric sensors continuously monitor the enclosure surface, automatically detect unauthorized contact or removal attempts, and trigger alerts without human intervention, enabling the system to secure itself autonomously.
2Reliability
If piezoelectric sensors are used to monitor pressure on the enclosure, then theft detection capability is improved, but device complexity increases
Solution Approach 1:
The patent applies piezoelectric sensors at specific critical locations on the enclosure surface where unauthorized removal or tampering would first occur. By strategically placing sensors at mounting points and vulnerable areas rather than uniformly across the entire enclosure, the system achieves effective theft detection with minimal sensor count, reducing overall system complexity.
Solution Approach 2:
The piezoelectric sensors serve multiple functions: detecting theft attempts, monitoring enclosure integrity, and potentially measuring environmental pressures. This multi-functionality reduces the need for separate detection systems, thereby improving theft detection capability without proportionally increasing system complexity.
3Loss of information
If GPS tracking is implemented on the enclosure, then location monitoring is improved, but energy consumption increases
Solution Approach 1:
The GPS tracking system operates periodically rather than continuously, updating location information at scheduled intervals or when triggered by specific events such as pressure changes detected by piezoelectric sensors. This periodic operation maintains effective location monitoring while significantly reducing energy consumption compared to continuous tracking.
Solution Approach 2:
The system pre-loads GPS data and uses buffered communication, only transmitting location information when necessary or when power is available. This approach ensures location information is ready when needed while minimizing energy expenditure during transmission and processing operations.
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 provides effective theft detection and alert mechanisms, including audio alerts, network notifications, and camera activation, enhancing security without the need for extensive manual patrols or fencing.
Implementation Method 1
Pressure exerted by the enclosure to a fixture as measured by one or more piezoelectric sensors can be monitored
Data Source
AI summary
Systems and methods are provided for detecting theft of an enclosure of an autonomous vehicle. Pressure exerted by the enclosure to a fixture as measured by one or more piezoelectric sensors can be monitored. A change in the pressure exerted by the enclosure as measured by the one or more piezoelectric sensors can be detected. An alert can be generated based on the change in the pressure.