Single-Bit Reception With Coded Excitation for Lightweight Advanced Ultrasonic Imaging Systems

Area of Science:

• Materials Science
• Engineering
• Signal Processing

Background:

• Ultrasonic phased array imaging systems require enhancements in speed, data storage, hardware complexity, and probe longevity.
• Current systems face limitations that impact efficiency and reliability across industrial and medical applications.

Purpose of the Study:

• To investigate the combination of coded excitation and single-bit data capture for improving ultrasonic phased array imaging.
• To assess the impact of this combined approach on image resolution, signal-to-noise ratio (SNR), and hardware requirements.

Main Methods:

• Utilized coded excitation pulses and single-bit data capture in an ultrasonic phased array system.
• Employed pulse compression to recover image resolution from low-resolution data.
• Performed phase coherence imaging (PCI) and total focusing method (TFM) on a carbon steel sample with tip diffraction.

Main Results:

• Achieved high SNR images comparable to conventional methods despite using single-bit data.
• Demonstrated effective resolution recovery through coded excitation pulse compression.
• Showed minimal imaging performance degradation with significantly reduced data size and resolution.

Conclusions:

• Combining coded excitation with single-bit data capture enhances ultrasonic imaging system efficiency and reliability.
• This method allows for high-resolution imaging from low-resolution data at low transmission voltages.
• Implications include improved data compression, acquisition, operator safety, and hardware simplification for ultrasonic imaging.