| 电磁超声脉冲激励电路的设计 |
| |
| 引用本文： | 胡力,严仍春. 电磁超声脉冲激励电路的设计[J]. 理化检验(物理分册), 2013, 0(3): 174-176 |
| |
| 作者姓名： | 胡力 严仍春 |
| |
| 作者单位： | 上海材料研究所 |
| |
| 摘 要： | 为了解决电磁超声能量转化效率较低、信号微弱的问题,设计了一种电磁超声脉冲激励电路。过零检测电路和单片机实现磁场强度与涡流激发的同步以及脉冲个数的控制;UCC3895芯片产生全桥电路的驱动信号,控制脉冲的频率和占空比;MOSFET管IRFP450构成全桥电路实现信号的功率放大。试验结果表明：该系统的稳定性好,可调节磁场强度,能有效地提高电磁超声能量转化效率。
|
| 关 键 词： | 电磁超声 脉冲激励电路 功率放大 UCC3895 |
Design of Pulse Circuit of Exciting Electromagnetic Ultrasonic |
| |
| HU Li,YAN Reng-chun. Design of Pulse Circuit of Exciting Electromagnetic Ultrasonic[J]. Physical Testing and Chemical Analysis Part A:Physical Testing, 2013, 0(3): 174-176 |
| |
| Authors: | HU Li YAN Reng-chun |
| |
| Affiliation: | (Shanghai Research Institute of Materials,Shanghai 200437,China) |
| |
| Abstract: | A method of exciting electrical pulse for electromagnetic ultrasonic has been proposed which was to solve the key problems exist in electromagnetic ultrasonic test,such as low transduction efficiency and weak signal.Synchronization of magnetic field strength and eddy current excitation and the number of pulses were controlled by zero crossing detection circuit and MCU.A drive signal of the full bridge circuit was generated by UCC3895 chip to control the frequency and duty radio of the signal.Power amplification was realized by the full bridge constitute of IRFP450.The experimental results showed that the system had good stability,the magnetic field strength was adjustabled,and the electromagnetic ultrasonic energy conversion efficiency could be effectively improved. |
| |
| Keywords: | electromagnetic ultrasonic pulse excitation circuit power amplification UCC3895 |
| 本文献已被 CNKI 维普 等数据库收录！ |
|
