Phased array ultrasonic transducer excitation system for improving amplitude

Abstract

The invention discloses a phased array ultrasonic transducer excitation system for improving amplitude, a PC (Personal Computer) in the system is used for providing focusing excitation parameters of each channel of a phased array ultrasonic transducer, and an FPGA (Field Programmable Gate Array) focusing delay module is used for calculating focusing delay data of each channel according to the focusing excitation parameters of each channel; each LC oscillation circuit outputs focusing delay data of each channel, outputs PWM waves carrying the focusing delay data and corresponding to each channel in combination with the focusing delay data of each channel, and inputs the PWM waves carrying the focusing delay data and corresponding to each channel into a corresponding fundamental frequency control circuit through an I / O channel expansion module; and oscillating the direct-current source signal into a sine wave signal and outputting the sine wave signal to a corresponding channel of the phased array ultrasonic transducer. High-amplitude sine waves are excited through the excitation system, zero high-frequency components are achieved, load heating and piezoelectric ceramic vibration loss can be reduced, and the service life of the phased array ultrasonic transducer can be remarkably prolonged.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of phased array ultrasonic transducers, in particular to an excitation system for phased array ultrasonic transducers for increasing amplitude. Background technique [0002] Neuromodulation technology in brain science is a biomedical engineering technology that uses implantable or non-implantable technology to change the activity of the nervous system by means of physical stimulation or drugs, thereby improving the symptoms of patients' diseases and improving the quality of life. In addition to the application of drugs, the technology of nerve stimulation based on the action of physical factors such as electricity, magnetism, light, and sound plays an important role in the basic research of neuroscience and the clinical diagnosis and treatment of neurological and mental diseases. As a kind of neuromodulation technology, magnetoacoustic coupled electrical stimulation technology (TMAS) is...

AI Technical Summary

Problems solved by technology

[0003] The traditional ultrasonic transducer excitation source system uses a high-voltage high-frequency square wave for excitation, but the high-frequency component of the square wave will cause heat and damage to the ultrasonic transducer

In addition, because the power amplifier based on PWM amplification usually needs to set a dead zone, resulting in low waveform accuracy, the actual excitation waveform is not a standard square wave or a standard sine wave, and pulse signals with accurate frequencies cannot be transmitted.

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