Frequency tracking device and method for ultrasonic transducer

• Main Authors: LI GAOYA, SUN LIANGJUN
• Format: Patent
• Language: Chinese; English
• Published: 01.09.2020
• Subjects: DIAGNOSIS; HUMAN NECESSITIES; HYGIENE; IDENTIFICATION; MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC ORINFRASONIC WAVES; MEASURING; MEDICAL OR VETERINARY SCIENCE; PHYSICS; SURGERY; TESTING

The invention relates to a frequency tracking device and method for an ultrasonic transducer and belongs to the technical field of medical instruments. Resonant frequency points are detected by measuring a phase difference of current and voltage signals; and the frequency of the ultrasonic transducer is tracked to match the inherent frequency change of the transducer, so that the transducer worksin an optimal resonance state, and the output power of the transducer is maximum. The frequency tracking device comprises a DSP processing module, a DDS signal generation module, a push-pull power amplification module, a phase acquisition module and a CPLD signal processing module. According to the frequency tracking method, automatic frequency tracking under different loads can be well achieved,operation is reliable, and the frequency tracking method can be widely applied to ultrasonic knives. 本发明涉及一种超声换能器频率跟踪的装置及方法，属于医疗器械技术领域，其通过测量电流和电压信号相位差的方式来检测谐振频率点，对超声换能器频率进行跟踪，以匹配换能器的固有频率变化，使换能器工作在谐振最佳状态，从而使换能器的输出功率最大，其包括DSP处理模