摘要
针对脉冲式动静脉气压治疗仪低成本和高可靠的设计要求、电路包含电磁阀和气泵等器件导致信号存在尖脉冲干扰和小幅度高频干扰影响压力控制精度等问题,提出以微控制器STC89C58为核心,采用软件模拟I2C总线协议、光电耦合隔离干扰、中值滤波和算术平均滤波算法滤除噪声、PID算法控制压力等软硬件设计技术。软件仿真实验和产品运行结果都表明:仪器成本较低,运行稳定可靠,压力误差可控制在±5 mm Hg(毫米汞柱)范围内。
Pulse arteriovenous barometric（ PAB） therapeutic apparatus has design requirements of low cost and high reliability,and its circuit includes the parts of electromagnetic valve and pump that lead to peak pulse and small amplitude high frequency interference existing in its signals and impacting the pressure control precision.Aiming at these problems,we put forward the hardware and software design technology.Microcontroller STC89C58 is used as the core of hardware,and the software simulations are adopted in I2 C bus protocol,photoelectriccoupling for isolating the interference,median filtering and arithmetic average filtering algorithm for filtering out the noises,PID control algorithm for controlling the pressure etc.Both the Software simulation experiment and PAB running results show that the system has low cost,and operates stably and reliably,the precision of pressure error can be controlled within ± 5 mm Hg.
出处
《计算机应用与软件》
CSCD
北大核心
2014年第11期241-244,共4页
Computer Applications and Software
基金
安徽省高校省级自然科学研究项目(KJ2012B053)
关键词
治疗仪
控制系统
压力
滤波算法
PID控制算法
Therapeutic apparatus
Control system
Pressure
Filtering algorithm
PID control algorithm
