Variable Pulse Width Ground Penetrating Radar
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Solution Overview
Problem
Current ground penetrating radar systems are limited in their ability to simultaneously image both shallow and deep objects with high resolution due to the trade-off between high frequency pulses, which provide detailed resolution but limited penetration, and low frequency pulses, which penetrate deeper but offer less resolution.
Innovation Solution
A ground penetrating radar system capable of generating variable pulse widths and frequencies, utilizing a combination of antennas and control circuitry to switch between different pulse generators, allowing for the same system to operate effectively at both shallow and deep depths by adjusting pulse width and frequency as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high frequency radar pulses are used, then resolution of shallow objects is improved, but penetration depth into the ground deteriorates
Solution Approach 1:
The radar system dynamically switches between multiple pulse generators with different frequencies and pulse widths based on the imaging requirements. The system can adaptively select high frequency pulses for shallow high-resolution imaging or low frequency pulses for deep penetration, making the frequency characteristic variable rather than fixed.
Solution Approach 2:
The radar system incorporates multiple pulse generators (first, second, and third pulse generators) that can produce different frequency ranges and pulse widths. This multi-functional capability allows a single radar system to perform both high-resolution shallow imaging and deep penetration imaging, eliminating the need for separate specialized systems.
2Length of stationary object
If low frequency radar pulses are used, then penetration depth into the ground is improved, but resolution of imaged objects deteriorates
Solution Approach 1:
The system dynamically adjusts the frequency and pulse width characteristics based on the required penetration depth. For deep imaging applications, the system selects low frequency pulses with wider pulse widths that penetrate deeper while maintaining adequate resolution for large or multiple objects at depth.
Solution Approach 2:
Different pulse generators are optimized for different frequency ranges and penetration depths. The first pulse generator produces high frequency narrow pulses for shallow high-resolution work, while the second produces low frequency wide pulses for deep penetration, and the third provides intermediate frequency capability. Each component has specialized local quality optimized for its specific function.
3Device complexity
If a single radar system is used to image both shallow and deep objects, then system complexity is reduced, but the ability to provide high resolution for both shallow and deep objects simultaneously deteriorates
Solution Approach 1:
The single radar system achieves multi-functionality by incorporating multiple pulse generators that can be selectively activated. The control circuitry manages the different pulse generators to provide high-resolution imaging for both shallow and deep objects by selecting appropriate frequency and pulse width combinations, maintaining high resolution capability while reducing overall system complexity compared to using multiple separate radar systems.
Data Source
AI summary
A ground penetrating radar system is described that is able to create both low frequency, wide pulses, and high frequency, narrow pulses, to enable both deep and shallow operation of the ground penetrating radar on demand, including simultaneous operation.