Gridless RF Detection Surface for Hypervelocity Impact Location
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Solution Overview
Problem
Existing methods for detecting hypervelocity impacts, such as those from ballistic missile intercepts or micrometeoroids, face challenges due to the transitory nature of high-frequency signals and the need for extensive sensor networks, leading to large, power-intensive data acquisition systems that are impractical for operational vehicles or structures.
Innovation Solution
A gridless detection surface utilizing RF emissions and Time Of Arrival (TOA) measurements with multiple sensors to determine precise impact locations, employing an electronically conductive surface with an inner conductor layer between dielectric layers and conductive ground planes, allowing for efficient detection and processing of RF pulses generated by hypervelocity impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a grid-based detection system with wire mesh is used to detect impact points, then impact location can be determined by detecting wire breaks, but the system requires extensive sensor networks and large data acquisition electronics leading to increased size, complexity, and power consumption
Solution Approach 1:
The patent extracts only the essential function of impact detection from the complex grid-based system. Instead of using a wire mesh grid that requires breaking detection, the invention uses a gridless detection surface with RF emissions that can be detected without physical disruption to the surface structure. This eliminates the need for extensive sensor networks while maintaining impact location determination capability.
Solution Approach 2:
The patent replaces the mechanical wire break detection system with an electromagnetic RF emission-based detection system. The detection surface generates RF emissions that are modulated by hypervelocity impacts, allowing electronic detection without mechanical contact or physical disruption. This substitution eliminates the need for physical sensor networks and reduces data acquisition complexity.
2Reliability
If high-speed data acquisition electronics are used to capture transient impact signals, then impact detection capability is improved, but power consumption increases significantly
Solution Approach 1:
The patent employs periodic RF emissions from the detection surface that are continuously present but only modulated during impact events. This allows the system to maintain detection readiness without continuously operating high-power data acquisition electronics at full speed. The RF emissions provide a continuous reference that can be processed at lower power levels, with high-speed acquisition only activated when impacts occur.
Solution Approach 2:
The patent changes the detection parameter from direct high-speed signal capture to RF emission frequency analysis. By detecting impacts through changes in RF emission frequency rather than direct high-speed voltage sampling, the system achieves reliable impact detection with significantly reduced power consumption. The RF modulation approach allows for energy-efficient signal processing while maintaining detection reliability.
3Measurement precision
If multiple sensors are distributed throughout the structure to monitor for transient signals, then damage detection accuracy is improved, but the size and complexity of the system increases
Solution Approach 1:
The patent makes the detection surface itself universal by integrating multiple functions into a single structure. The gridless detection surface simultaneously serves as the structural component and the sensing element, eliminating the need for separate sensor networks. The RF emission capability is embedded in the detection surface material, allowing it to function as both structure and sensor without adding mass.
Solution Approach 2:
The patent introduces RF emissions as an intermediary between the impact event and the detection system. Instead of requiring direct contact with multiple physical sensors, the RF emissions serve as a mediator that carries impact information across the detection surface. This intermediary approach allows for distributed detection without the need for physical sensor networks, reducing overall system mass.
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 significantly reduces size, cost, and power consumption while achieving precise impact location determination with commercially available electronics, overcoming the limitations of traditional grid-based systems.
Implementation Method 1
utilizes multiple sensors that directly measure RF emissions generated by hypervelocity impacts
Implementation Method 2
Time Of Arrival (TOA) position measurements for determining the precise impact location
Data Source
AI summary
A hypervelocity impact detection method and system for determining the precise impact location in a detection surface, of impacts such as ballistic missile intercepts, micrometeoroids and orbital debris (MMOD) or other shock events, utilizes a gridless detection surface capable of propagating radio frequency (RF) impact detection signals responsive to receiving hypervelocity impacts from objects, and multiple sensors on the detection surface that directly measure radio frequency RF emissions generated by the hypervelocity impacts on the surface, and a time of arrival (TOA) position measurement technique for determining the precise impact location in the detection surface.