HUO Liang-sheng, LI Cheng-long
（School of Materials Science and Mechanical Engineering, Beijing Technology and Business University, Beijing 100048, China）
Abstract： A kind of remote ultrasonic generating system is designed in this paper. Microcontroller unit (MCU) Kinetis60 and direct digital synthesizer (DDS) AD9951 constitute the core section of this ultrasonic generating terminal in this system. A friendly and easy-operating host computer software is contrived to control the terminal to generate sinusoidal, rectangular and triangular waveform with variable frequency, amplitude and phase through ZigBee wireless transmission protocol. In order to enhance the practical driving ability, this system also includes power amplifier circuit and transformer matching design, which enable the ultrasonic generating terminal to output enough power for applying to different types of ultrasonic energy convertors. Through experimental verification, the host computer can precisely and swiftly control the ultrasonic generating terminal to generate the above three waveforms with variable wave elements. Oscilloscope is used to verify the terminal output performance of this remote system.
Key words： ultrasonic; direct digital synthesizer (DDS); microcontroller Kinetis60; power amplification; toroidal transformer
CLD number： TH89 Document code： A
Article ID： 1674-8042（2017）04-0396-09 doi： 10.3969/j.issn.1674-8042-2017-04-013
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基于Kinetis60和AD9951的远程超声波信号发生系统
霍亮生， 李成龙
（北京工商大学 材料与机械工程学院，北京100048）
摘要:本文主要论述了一种远程超声波信号发生系统的设计过程。在该系统中，微控制器Kintis 60和直接数字合成器（DDS）构成了超声波发生终端的核心。设计了界面友好、便于操作的上位机控制软件，用于通过ZigBee无线传输协议控制远程终端发出不同频率、幅值和相位的正弦波、矩形波以及三角波。为了提高该系统的实际驱动能力，该远程系统集成了功率放大和阻抗匹配环节。这些功放和阻抗匹配设计使得超声波发生终端能输出足够大的功率，以适应不同类型的超声波换能器。通过实验证实，上位机可以精准、快速控制超声波发生终端产生上述不同参数的波形。在实验测试中，用示波器来检测该远程系统的终端输出波形的质量。
关键词:超声波；直接数字合成器；微控制器Kinetis 60；功率放大；环形变压器
引用格式：HUO Liang-sheng, LI Cheng-long. Design of remote ultrasonic signal generating system based on Kinetis60 and AD9951 . Journal of Measurement Science and Instrumentation, 2017, 8(4)： 396-404. ［doi： 10.3969／j.issn.1674-8042.2017-04-013］
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