A multi-channel ultrasonic pulsed synchronization method based on interpolation and autocorrelation detection

By using interpolation and autocorrelation detection methods, high-precision synchronization of multi-channel ultrasound systems is achieved, solving the synchronization problem of multi-channel systems in complex environments, reducing hardware resource consumption, and meeting the needs of phased array detection.

CN116800367BActive Publication Date: 2026-06-19SUN YAT SEN UNIV
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Patent Information

Application Number
CN202310797518.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-06-30
Publication Date
2026-06-19
Estimated Expiration
2043-06-30

AI Technical Summary

Technical Problem

In existing technologies, multi-channel ultrasonic testing systems struggle to achieve high-precision synchronization over long distances and in environments with significant interference, resulting in high hardware resource consumption and complex phased array acoustic field control.

Method used

By employing interpolation and autocorrelation detection methods, in-phase and quadrature signals are generated through FPGA. The optimal sampling time is obtained using an interpolation algorithm, and autocorrelation detection is performed using pulse sequences encoded with generalized Barker codes to achieve synchronization between multiple channels.

Benefits of technology

Achieving high-precision synchronization among multiple instruments over long distances and in environments with significant interference meets the requirements of ultrasonic phased array testing and reduces hardware resource consumption.

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Abstract

This invention discloses a multi-channel ultrasonic pulse synchronization method based on interpolation and autocorrelation detection, belonging to the field of ultrasonic signal synchronization. The method includes: a transmitting FPGA generating a set of in-phase and quadrature signals and sending them to a receiving FPGA; the transmitting and receiving FPGAs respectively generating local bit synchronization clocks using the in-phase and quadrature signals; after the bit synchronization clocks are established, the transmitting FPGA sends a pulse sequence to the receiving FPGA that needs to establish synchronization; the transmitting and receiving FPGAs respectively detect the pulse sequence, and if the detection is successful, pull up the synchronization status indicator signal; if the synchronization status indicator signal is detected to be high, the chips of the ultrasonic system's transmission and acquisition boards controlled by the transmitting and receiving FPGAs are reset. This invention, as a multi-channel ultrasonic synchronization method, can achieve high-precision synchronization between multiple instruments under long-distance and large interference conditions, thus meeting the requirements for ultrasonic phased array detection.
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