摘要
人体血液中的环境较为复杂,血压不稳,血流加速会造成射频控温热凝器中的温度控制精度较差的缺陷;提出一种基于嵌入式处理器LPC2148而设计和实现的射频温度控制系统;通过铠装温度传感器采集温度,送将采集到的温度值数字化,进行差温计算,系统的软件设计中,采用了基于模糊PID算法,通过Pvar、Ivar、Dvar(比例、积分、微分)三方面的结合调整形成一个模糊控制算法控制射频输出的持续时间长短,从而控制针尖加热的温度和时间,形成一个PWM脉冲宽度调制的精确控制;通过实验测试,该温度控制系统后,可以将被加热介质的温度稳定在设定温度的±1℃内,从而实现了对于人体内射频温度的精确和稳定控制。
The human body in the blood of the environment is more complex, blood pressure instability, blood flow acceleration will cause of the warm the rf control temperature precision poor. Is proposed based on a LPC2148 embedded processors and design and implemen- tation of rf temperature control system. Through the armoured temperature sensors to collect temperature, send will the collected digital temperature and poor temperature calculation, the system software design, the PID algorithm based on fuzzy, through the Pvar, Ivar, Dvar （proportion, integral, differential） three combination of adjustment to form a fuzzy control algorithm of rf output control for the length of time, so as to control the temperature and the time between the heating, forming a PWM pulse width modulation of accurate control. Through the experiment test, the temperature control system, will he the heating medium temperature stability in set temperature in degree is obtai ℃ is realized, and the temperature of the human body for rf accuracy and stability control.
出处
《计算机测量与控制》
CSCD
北大核心
2012年第11期2983-2985,共3页
Computer Measurement &Control
