Based on PZT-8 piezoelectric ceramics, a 256-element random-distributed phase-controlled transducer is designed. Based on FPGA, stm32 and class-E power amplifier circuits, a 2-channel array element driving system is designed.
Dec 2, 2023 · When the space vector pulse width modulation (SVPWM) is used in PMSM control, the stator three phase currents must be collected for its control calculation. In this paper, a PMSM stator current collection system based on C8051F500 and AD7865 is designed, and proved to be effective with experiments.
Abstract—The multi-element phase-controlled transducer has the advantages of adjustable focal length and transcranial focusing. It has become a research hotspot in recent years. The structure of the phase-controlled transducer and its driving system are the key to determine whether HIFU can be applied.
Phased arrays generate ultrasonic waves by using recisely-defined time delays for each element in an ultrasonic array group, this permits constructive and destructive interference of the wavefronts to form the pre-defined beam. So, ultrasonic phased arrays are well suited to weld inspections.
The design method can provide a reference value for the design of the drive system of phased array transducer with different numbers of elements. Introduction. An ultrasonic phased array is a transducer array composed of several piezoelectric transducer array elements. The electronic system excites each element ...
Nov 17, 2022 · Figure 2 – Key parameters of one-dimensional, phased array design. Each element in the Ultrahaptics array produces a single frequency sinusoidal ... This is measured experimentally by driving a known signal through a test transducer and measuring the output phase around a circle. An ideal ...
In this paper, a field programmable logic gate array (FPGA), a high-speed digital-to-analog converter and an integrated power amplifier are used to design a phase control and drive system for multi-element phase-controlled transducer for high intensity focused ultrasound treatment.
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The Phased Array concept is based on the use of transducers made up of individual elements that can each be independently driven. These probes are connected to specially-adapted drive units enabling independent, simultaneous emission and reception along each channel. These units should also be able to effect, ...
Based on the above scheme, this paper designs a 16-channel phased array linear driving system prototype, tests the technical performance of the homemade system, compares the homemade system with the nonlinear driving system driven by square wave, the homemade linear driving system has reduced the focal spot diameter by ...
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