An exciting source for EMATs base on DDS technology

Author

Li Bing

Author_Institution

Guidaojiaotong Polytech. Inst., Shenyang, China

fYear

2015

fDate

23-25 May 2015

Firstpage

4284

Lastpage

4287

Abstract

In order to maximize the efficiency of electric/acoustic transformation, a DDS technology based electrical power source for excitation of EMATs (electric magnetic acoustic transducers) is described. The power source consist of DDS based signal generator, MCU (Micro Controller Unit), power amplifier and impedance match circuit to EMATs. Both the hardware and software of the power source are explained in detail. According to the request of EMAT, the electric power source is designed to have following characteristics: narrow pulses, large peak current, adjustable repetition frequency, pulse frequency, numbers of pulses and excitation time delay, which effectively boosted the whole efficiency of an EMAT detecting system, and facilitated the whole equipment in digital control and operation.

Keywords

acoustoelectric transducers; microcontrollers; ultrasonic transducers; DDS technology; MCU; adjustable repetition frequency; electric magnetic acoustic transducers; electric power source; electric-acoustic transformation; electrical power source; electromagnetic ultrasound; excitation time delay; impedance match circuit; microcontroller unit; power amplifier; pulse frequency; Acoustics; Electromagnetics; Electron tubes; Frequency control; Impedance; Microcomputers; Time-frequency analysis; DDS technology; EMAT; Impedance match circuit; Narrow pulses;

fLanguage

English

Publisher

ieee

Conference_Titel

Control and Decision Conference (CCDC), 2015 27th Chinese

Conference_Location

Qingdao

Print_ISBN

978-1-4799-7016-2

Type

conf

DOI

10.1109/CCDC.2015.7162683

Filename

7162683