UWB Radar Control Architecture for Precise Low-Complexity Sampling
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Solution Overview
Problem
Traditional ultra-wideband ground penetrating radars are bulky and costly due to their reliance on high-cost data acquisition devices, which hinders their widespread adoption for detecting safety hazards under municipal underground pipelines and transportation facilities.
Innovation Solution
The ultra-wideband ground penetrating radar control system incorporates a synchronous clock generating circuit, GPS positioning module, digitally controlled delay circuit, analog-to-digital conversion circuit, and a main controller connected via an external sampling gate, reducing system volume and cost while enhancing reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional high-cost data acquisition devices are used, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent divides the data acquisition function into separate modules: ADC module for signal conversion, FPGA module for timing control and data processing, and GPS module for positioning. This segmentation allows each module to be optimized independently while reducing overall system complexity and cost compared to using a single high-cost integrated data acquisition device.
Solution Approach 2:
The patent uses multiple lower-cost ADC channels instead of a single high-cost data acquisition card. By copying the acquisition function across multiple simpler components, the system achieves the same measurement precision while reducing device complexity and cost.
2Reliability
If traditional data acquisition devices are used, then reliability is maintained, but volume and cost increase
Solution Approach 1:
The patent merges multiple functions (data acquisition, timing control, signal processing, and positioning) into a single integrated control system using FPGA as the core. This consolidation reduces the overall system volume while maintaining reliability through the coordinated operation of integrated components rather than separate bulky devices.
Solution Approach 2:
The FPGA controller serves multiple functions simultaneously: it controls the ADC sampling timing, processes radar signals, manages GPS data, and coordinates the measuring wheel encoder. This multi-functionality eliminates the need for separate dedicated devices for each function, reducing system volume while maintaining operational reliability.
3Measurement precision
If synchronized sampling is implemented, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The FPGA controller generates its own synchronized sampling clock and timing signals internally, eliminating the need for external complex synchronization circuits. The system serves its own timing needs through the FPGA's built-in clock management and control logic, achieving precise equivalent sampling while reducing overall device complexity.
Solution Approach 2:
The patent replaces potential mechanical or external electronic synchronization mechanisms with software-based timing control within the FPGA. The synchronized sampling is achieved through digital logic and programmed timing sequences rather than external hardware synchronization circuits, reducing complexity while maintaining precision.
Data Source
AI summary
An ultra-wideband ground penetrating radar control system, comprising a synchronous clock generating circuit, a GPS positioning module, a measuring wheel encoder module, a digitally controlled delay circuit for equivalent sampling, an analog-to-digital conversion (ADC) circuit, and a main controller. The synchronous clock generating circuit, the GPS positioning module, the measuring wheel encoder module, the digitally controlled delay circuit and the ADC circuit are all connected to the main controller. The synchronous clock generating circuit is further connected to an external ultra-wideband radar transmitter. The digitally controlled delay circuit is further connected to an external sampling pulse generation circuit for equivalent sampling. The ADC circuit is further connected to an external sampling gate for equivalent sampling. The main controller is further connected to an external server via Ethernet. The volume of an ultra-wideband ground penetrating radar control system is reduced. The connecting cables of the system is simplified. The reliability of the ultra-wideband radar system is improved.