Covert License Plate Reader in Traffic Barrel
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Solution Overview
Problem
Existing vehicle license plate monitoring systems are not covert and can be detected by passing vehicles, limiting their effectiveness in surveillance applications.
Innovation Solution
A portable covert license plate reader system is integrated into a transportable highway traffic control device, using an infrared camera and illuminator for image capture and processing, with wireless communication to a mobile surveillance unit for real-time comparison with target plate numbers, triggering alarms for matches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a license plate reader is installed in a visible or conventional position (e.g., overhead, pole-mounted, or in plain sight), then it can effectively monitor and read license plates, but it can be detected by passing vehicles, reducing its effectiveness for covert surveillance applications
Solution Approach 1:
The license plate reader is integrated into a specific local position within the traffic control device (traffic barrel) where it remains covert while maintaining monitoring capability. The reader is positioned to read plates from specific angles and distances, creating a localized monitoring zone that is effective for surveillance but hidden from general view.
Solution Approach 2:
The traffic control device (traffic barrel) serves as an intermediary structure that houses the license plate reader. This intermediary object provides concealment for the reader while maintaining its monitoring function, allowing the system to operate covertly without requiring the reader to be in plain sight.
2Object-affected harmful factors
If a portable license plate reader is positioned in a covert location, then it remains undetected by passing vehicles, but it may have limited field of view or monitoring coverage
Solution Approach 1:
The monitoring system is segmented into multiple portable units distributed along the roadway. Each unit covers a specific segment or zone, and multiple units work together to provide comprehensive coverage. This allows each individual reader to maintain a limited but effective field of view while the overall system achieves broad monitoring capability.
Solution Approach 2:
The system extends monitoring coverage by deploying multiple readers along the length of the roadway (spatial dimension) rather than relying on a single reader with a wide field of view. This dimensional approach to deployment allows each reader to remain covert with a focused view while the collective system achieves comprehensive coverage.
3Loss of time
If real-time license plate comparison is performed at the mobile surveillance unit, then immediate identification of target plates is achieved, but it requires continuous communication and processing resources
Solution Approach 1:
The system performs preliminary actions by pre-loading target license plate numbers into the mobile surveillance unit before deployment. This allows the reader to compare captured plates against the pre-loaded target list in real-time without requiring continuous communication with remote databases, reducing latency while maintaining the ability to identify targets immediately.
Solution Approach 2:
The critical function of target plate comparison is extracted from remote operations and embedded directly in the portable reader system. By taking out the comparison capability and placing it locally in the mobile surveillance unit, the system achieves real-time identification without relying on continuous external communication infrastructure.
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
Enables undetected monitoring and immediate identification of target license plates, enhancing law enforcement capabilities by providing real-time alerts and updates through a mobile and operations center network.
Implementation Method 1
The illumination source is infrared, which is invisible to the driver
Implementation Method 2
an illuminator cooperative with the camera to read images in any operating environment (day or night, fair or inclement weather)
Implementation Method 3
A portable covert license plate reader includes an infrared camera for the imaging of vehicle license plates
Data Source
AI summary
A surveillance system for covertly monitoring vehicle license plates. A portable covert license plate reader is provided for automatically reading license plate images for each of a plurality of moving vehicles that pass through a field of view of a camera in the reader without detection by the moving vehicles. A mobile surveillance unit is located in proximity to the license plate reader for receiving license plate character strings extracted by the reader, comparing each received image with a list of target plates of interest to law enforcement, and generating an audible alarm and a visual display when a match is found. An operations center is also provided for communicating with the mobile surveillance unit to receive license plate data from the mobile surveillance unit and to provide updates to the list of target plates stored at the mobile surveillance unit.