Vehicle Tow-Away Detection Using Radar Target Map Comparison
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Solution Overview
Problem
Vehicle theft remains a significant problem despite various security measures, with existing systems being vulnerable to countermeasures such as GPS jammers, and there is a need for efficient detection methods that do not require additional hardware.
Innovation Solution
The method utilizes existing vehicle radar sensors and a hierarchical Hidden Markov Estimation (hHME) model to generate target maps indicating the position and movement of objects around the vehicle, comparing these to previous maps to determine if the vehicle is being towed away, and outputs alarm messages via various communication channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If GPS tracking systems are used for vehicle theft prevention, then vehicle location can be monitored, but the system becomes vulnerable to GPS jammers and signal interference
Solution Approach 1:
The patent uses radar sensors as an intermediary detection mechanism instead of relying solely on GPS signals. The radar system detects objects and measures distances to determine vehicle movement, providing an alternative detection pathway that is not susceptible to GPS jamming. This intermediary system bridges the gap between vehicle security needs and resistance to electronic countermeasures.
2Reliability
If additional security hardware is added to detect tow-away, then detection capability improves, but system complexity and cost increase
Solution Approach 1:
The patent repurposes existing radar sensors originally designed for other vehicle functions (such as parking assistance or collision avoidance) to perform tow-away detection. By making the existing hardware multi-functional, the system achieves enhanced security capabilities without adding dedicated new components, thereby reducing overall system complexity while maintaining detection reliability.
Solution Approach 2:
The system uses the vehicle's own existing sensor infrastructure to provide security functions. The radar sensors already present in the vehicle are utilized for dual purposes: their original function and tow-away detection. This self-service approach eliminates the need for separate dedicated security hardware, reducing complexity while maintaining effective detection.
3Reliability
If radar sensors are continuously activated for tow-away detection, then detection accuracy improves, but energy consumption increases
Solution Approach 1:
The patent implements periodic activation of the radar system rather than continuous operation. The radar sensors are activated at scheduled intervals to perform detection cycles, then deactivated to conserve energy. This periodic operation maintains adequate detection accuracy by frequently monitoring the environment while significantly reducing overall power consumption compared to continuous activation.
Solution Approach 2:
The system applies partial action by activating radar detection only when specific conditions are met, such as when the vehicle is in parking mode or when suspicious activity is detected by other sensors. Instead of maintaining full detection capability at all times, the system applies detection resources partially and selectively, optimizing the balance between detection accuracy and energy consumption.
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 approach effectively detects vehicle tow-away without adding hardware, reduces energy consumption, and provides reliable alerts to prevent theft, while being resilient to countermeasures like jamming.
Implementation Method 1
sensor circuitry including at least one radar sensor that obtains sensor data indicative of a plurality of objects near the vehicle
Data Source
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Figure 3A~3B
AI summary
A method includes generating a target map indicative of objects around the vehicle using sensor data from sensor circuitry of the vehicle, the sensor circuitry including at least one radar sensor; and determining, by processing circuitry, if the vehicle is being towed away. Determining if the vehicle is being towed away can include comparing the target map to a previously obtained target map, determining if the vehicle is moving based on the comparison, and in response to determining the vehicle is moving, outputting an alarm message indicative of the vehicle being towed away.