Design and implementation of multi-channel high-precision and large dynamic range data acquisition system.

Area of Science:

• Electronics
• Signal Processing
• Instrumentation

Background:

• Modern scientific experiments and industrial applications demand higher accuracy and dynamic range in data acquisition systems.
• Existing systems face challenges in balancing high accuracy with a large dynamic range.

Purpose of the Study:

• To design a multi-channel data acquisition system that balances high accuracy and large dynamic range.
• To optimize data processing modules using relevant algorithms and evaluate system performance.

Main Methods:

• Development of a multi-channel data acquisition system based on programmable gate arrays (FPGAs).
• Integration of an analog-to-digital converter acquisition module and a two-level FPGA data control processing module.
• Optimization of data processing using data fusion, gain control, and adaptive filtering algorithms.

Main Results:

• The data fusion algorithm reduced signal fluctuation amplitude, improving performance by 5 bits.
• The gain control algorithm achieved stable signal output within 0.4 ms.
• Adaptive filtering significantly enhanced signal quality, with overall system accuracy below 0.08% and dynamic range above 165 dB.

Conclusions:

• The designed multi-channel data acquisition system achieves high accuracy and an improved dynamic range.
• The system's optimized algorithms enhance signal processing capabilities.
• The developed system expands the application scope of data acquisition technology in demanding fields.