RFID Optical Target Identification for UAVs
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Solution Overview
Problem
Current radar targeting systems face challenges in distinguishing between enemy and friendly targets, particularly for smaller unmanned aerial vehicles (UAVs), as on-board identification friend or foe (IFF) transponders are not feasible due to payload limitations.
Innovation Solution
A system and method utilizing a radar system combined with an electro-optical detector and radiofrequency identification (RFID) tags that transmit optical signals for remote target identification, enabling the detection and classification of targets even at distances greater than 2 km, including small UAVs, by generating and transmitting optical signals based on identifying data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If on-board IFF transponders are used for target identification, then target identification capability is improved, but payload weight and device complexity increase making it infeasible for smaller UAVs
Solution Approach 1:
The patent introduces an intermediary optical identification system consisting of an RFID tag and optical transmitter mounted on the target, which mediates between the radar system and the electro-optical detector. This intermediary system enables identification without requiring heavy on-board IFF transponders, resolving the contradiction between identification capability and payload weight
Solution Approach 2:
The patent replaces the traditional radiofrequency IFF transponder system with an optical-based identification system. By substituting the mechanical/electronic transponder with an optical transmitter that emits light signals detectable by electro-optical detectors, the system achieves identification with reduced weight and complexity
2Measurement precision
If on-board IFF transponders are used for target identification, then target identification capability is improved, but device complexity increases making it infeasible for smaller UAVs
Solution Approach 1:
The optical identification system acts as a simple intermediary that bridges the radar detection and electro-optical identification. This intermediary approach simplifies the overall system architecture by eliminating complex on-board transponders while maintaining identification capability through the coordinated radar-optical-detection chain
Solution Approach 2:
The patent extracts the identification function from the target platform itself and places it in a separate, simpler optical system. By taking out the complex transponder requirement and replacing it with a passive RFID tag and simple optical transmitter, the device complexity is significantly reduced
3Length of stationary object
If radar system operates at long range greater than 2 km, then detection capability is improved, but target identification accuracy deteriorates
Solution Approach 1:
The patent merges radar detection capability with electro-optical detection capability into a unified system. The radar provides long-range target location while the electro-optical detector provides high-precision identification, and the two systems are merged through coordinated operation to achieve both long-range detection and accurate identification simultaneously
Solution Approach 2:
The system employs feedback by using radar-detected target location information to guide the electro-optical detector's observation and tracking. This feedback mechanism ensures that the electro-optical detector can maintain accurate target identification even at long ranges by continuously adjusting its focus and tracking based on radar-provided positional data
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 a low-cost, lightweight, and compact method for identifying remote targets, reducing the risk of friendly fire and enhancing battlefield situational awareness, while also being applicable to commercial aircraft, even if their transponders are malfunctioning or disabled.
Implementation Method 1
The radar system is configured to locate a remote target
Implementation Method 2
The optical transmitter is configured to generate an optical signal based on the identifying data and to transmit the optical signal
Implementation Method 3
The electro-optical detector is configured to detect an optical signal transmitted from the target when the target is located
Data Source
AI summary
A system for providing remote target identification is provided that includes a radar system and an electro-optical detector. The radar system is configured to locate a remote target. The electro-optical detector is configured to detect an optical signal transmitted from the target when the target is located. The optical signal includes identifying data for the target.