Array calibration system and method of ultrasonic transducer

Abstract

Embodiments of the invention disclose an array calibration system and method of ultrasonic transducer for amplitude and phase calibration of an ultrasonic signal. The method, in one embodiment, involves an ultrasonic transducer, an analog front end, an analog-to-digital (A / D) converter, a memory, a comparator, a time delay unit and a gain controller, wherein the ultrasonic transducer receives the reflected ultrasonic echo signal, the comparator compares the signals of each channel to give a difference and sends to the time delay unit and the gain controller, the time delay unit controls time delay according to the difference to obtain a control time delay parameter, the gain controller controls the signal gain amplitude according to the difference to obtain a control signal gain amplitude parameter, the time delay unit adjusts the control time delay parameter, and the gain controller adjusts the control signal gain amplitude parameter so that the amplitudes and the phases of the signals of all the channels are the same.

Description

technical field [0001] The invention relates to the medical field, in particular to an array calibration system and method of an ultrasonic transducer. Background technique [0002] For ultrasonic imaging equipment, the ultrasonic transducer mainly realizes the mutual conversion between acoustic energy and electrical energy. The working principle of the transducer is generally the same, and its interior usually contains electric energy storage components and mechanical vibration components. When the transducer is used as a transmitter, the electric oscillating signal sent from the excitation power source will cause the electric field or magnetic field in the electric energy storage element in the transducer to change, and this change will generate a driving force on the mechanical vibrating part, causing it to enter Vibration state, thereby pushing the medium in contact with the mechanical vibration part of the transducer to vibrate, radiating ultrasonic waves into the medi...

AI Technical Summary

Problems solved by technology

[0003] When the transducers, analog front-ends and analog-to-digital converters of each receiving channel in the ultrasonic imaging equipment using transducer array imaging are completely consistent, the position of the focal point displayed on the ultrasonic image is the same as the real position, if not completely consistent, then The image content cannot correspond to the tissue structure, which is not conducive to clinical diagnosis

However, in the existing technology, the production process is difficult to ensure that the transducers, analog front-ends and analog-to-digital converters of each channel maintain consistent amplitude and phase characteristics

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