摘要
目的:呼吸机是阻塞性睡眠呼吸暂停综合征(Obstructive Sleep Apnea Syndrome,OSAS)最有效的治疗手段,为提高持续正压通气(Continuous Positive Airway Pressure,CPAP)呼吸机电机的响应速度,降低工作时整机噪声,提高OSAS治疗时患者舒适性,本文首次将电机转子磁场矢量控制(Field-Oriented Control,FOC)方法用于CPAP呼吸机电机的控制,有效解决上述问题。方法:采用以Cortex-M4为内核的TM4C129XNCZAD作为主控芯片,完成外设驱动、LCD显示和压力控制等,使用SDP600压差传感器和MPXV5004GC6U压力传感器采集管道内的压差和压力信号。利用具有强大的浮点运算和系统处理能力TMS320F28069FPZT数字处理器实现FOC电机控制算法,两个处理器通过SPI协议进行通信。结果:由整机工作噪声以及电机响应速度的数据表明,使用FOC控制策略能有效降低整机工作噪声和提高电机响应速度,在输出压力平稳度上与呼吸机领导国际品牌Res Med S9呼吸机无明显差异。结论:采用FOC电机控制策略的CPAP呼吸机具有电机响应速度快、噪声低、压力输出波动小等优点。
Objective Ventilator is the most effective treatment for obstructive sleep apnea syndrome （OSAS）. The motor rotor field-oriented control （FOC） was firstly applied for the motor control of continuous positive airway pressure （CPAP） ventilator to effectively increase the response speed of the motor of CPAP ventilator, reduce the working noise, and improve patients＇ comfort degree during the treatment for OSAS. Methods TM4C129XNCZAD with Cortex-M4 as core was applied as main control chip to complete peripherals drive, LCD display and pressure control. SDP600 differential pressure sensor and MPXV5004GC6U pressure sensor were used to collect differential pressure and pressure signals within tubes. Digital processor TMS320F28069FPZT with strong floating point arithmetic and system processing capacity realized FOC motor control arithmetic, and these two processors communicated via SPI protocol. Results The data of the system noise and motor response speed indicated that the CPAP ventilator based on FOC effectively reduced the working noise and improved the motor response speed, and that the stability of output pressure had no obvious difference with Resmed $9 ventilator, the international brand of ventilator. Conclusion The CPAP ventilator based on FOC has rapid motor respond speed, low noise, and stable output pressure.
出处
《中国医学物理学杂志》
CSCD
2015年第4期493-498,共6页
Chinese Journal of Medical Physics
基金
广东省教育部产学研结合项目(2012A032200013)
关键词
阻塞性睡眠呼吸暂停综合征
持续正压通气
呼吸机
磁场矢量控制
obstructive sleep apnea syndrome
continuous positive airway pressure
ventilator
field-oriented control
