摘要
对于以体表器官为主要应用对象的甚高频超声来说,扇扫方式下超声对组织的入射角在整个成像平面上分布极不均匀,会导致图像边缘部分的成像质量严重下降问题。文中提出了一种侧面输出的音圈电机及其伺服控制系统,用于高频超声探头的线性扫描。伺服系统采用STM32F103作为主控芯片,光电编码器作为位置传感器,同时使用PD算法对驱动电压进行PWM调节。系统仿真和实验选择了适当的控制参数,实验结果表明,该电机及其控制系统具有结构简单、精度高的优点,符合超声成像的要求。
With organs on the body surface as the main application of very high frequency ultrasound, sector scan ultrasonic on the organization of the incident angle in the imaging plane distribution is extremely uneven, leading to a serious decline in the imaging quality of image edge. In this paper, a voice coil motor and its servo control system are proposed for the linear scan of the high frequency ultrasonic probe. The servo system uses STM32F103 as the main control chip and the photoelectric eneoder as the position sensor, and adopts the PD algorithm for PWM drive voltage regulation. The appropriate control parameters are selected based on the system simulation and experiment. The experimental results show that the motor and its control system have the advantages of simple structure and high precision, which meets the requirements of ultrasonic imaging.
出处
《电子科技》
2016年第10期111-114,共4页
Electronic Science and Technology
关键词
音圈电机
伺服控制
高频超声
线性扫描
voice coil motor
servo system
high-frequency ultrasound
linear scanning
