A method, device and system for dynamic adjustment of ultrasonic signals

Abstract

The invention provides a dynamic adjustment method, an apparatus and a system for an ultrasonic signal. The dynamic adjustment method for the ultrasonic signal comprises the steps of a. sending an ultrasonic frequency excitation signal to an ultrasonic transducer so as to drive a launcher of the ultrasonic transducer to send an ultrasonic signal to a to-be-detected medium; b. receiving the ultrasonic signal passing through the to-be-detected medium from a receiver of the ultrasonic transducer; c. determining a central frequency of the ultrasonic transducer according to amplitude of the received ultrasonic signal; d. adjusting the frequency of the ultrasonic frequency excitation signal according to the central frequency, sending the adjusted ultrasonic frequency excitation signal to the ultrasonic transducer; and repeating the steps from a to d. With the dynamic adjustment method, the apparatus and the system for the ultrasonic signal, the frequency of the ultrasonic excitation signal and the central frequency of the ultrasonic transducer can be identified and matched automatically; and the frequency of the ultrasonic excitation signal can be changed dynamically, so that the an ultrasonic transducer system can work at an optimum state.

Description

technical field [0001] The present invention relates to an ultrasonic detection technology, in particular to a method, device and system for dynamic adjustment of ultrasonic signals. Background technique [0002] Ultrasonic testing technology has been widely used in various fields. In the field of medical devices, the technology of using ultrasonic detection to detect air bubbles in liquid lines is commonly used in applications such as syringe pumps, infusion pumps, hemodialysis machines, autologous blood salvage machines, infusion systems or heart-lung machines as well as metering and pipetting in pharmaceuticals and industry Titration device, etc. [0003] In the process of ultrasonic bubble detection, the closer the frequency of the driving signal externally applied to the ultrasonic transducer is to the intrinsic center frequency of the transducer, the stronger the emitted ultrasonic signal will be. When the frequency of the driving signal deviates from the inherent ce...

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Problems solved by technology

[0004] However, due to the dispersion and consistency of the resistance device, the output efficiency cannot be guaranteed, which directly leads to the reduction of output efficiency.

On the other hand, there is a difference in the inherent center frequency of the ultrasonic transducer itself, which cannot ensure its consistency, which will also cause the frequency of the external driving signal to not match well with the inherent center frequency of the ultrasonic transducer itself, resulting in poor transmission efficiency. reduce

At the same time, there is also the problem that the transmitted signal is too strong in the application. If the transmitted signal is too strong, it will easily cause signal distortion, affect the detection result, and even cause misjudgment.

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