1. a. Department of Biomedical Engineering| b. Hospital office| c. Medical Laboratory Research Center| d. Nonsurgical Treatment
Center for Osteoarthrosis| e. Department of Osteoarthrosis| f. The Fourth Depertmement Spine Surgery, Henan Orthopedics and
Traumatology Institute, Luoyang Orthopedic-Traumatological Hospital of Henan Province (Henan Provincial Orthopedic Hospital),
Luoyang Henan 471000, China| 2. Henan luozheng medical device factory, Luoyang Henan 471000, China
Abstract：Objective Design a kind of centralized control system for fumigation bed. Methods The delta programmable logic
controller（PLC）is used as the core of the control system. Many functions such as voice broadcast, over-temperature protection, dry
heating protection are centrally controlled by the PLC. The PID adjusting algorithm and the PWM pulse width modulation technology
are used to control the fumigation temperature accurately. The information interaction between the operator and the PLC are realized
by the human-computer interface. Results The protective ground impedance of this prototype was <0.1Ω. The temperature deviation
was <±1℃. The temperature rising time was <20 min. The over-temperature protection temperature deviation was <±2℃. The
noise was < 51dB. The single operation time was saved 2 min 47 s. Conclusion The design is safe and reliable. Its performance is
stable. The degree of intelligence is high, which can improve the working efficiency of operators.
赵东亮1a，郭艳幸1b，冯坤1c，郭珈宜1d，郭马珑1e，崔宏勋1f，丁震2. 熏蒸床集中控制系统设计[J]. 中国医疗设备, 2021, 36(2): 30-33.
ZHAO Dongliang1a，GUO Yanxing1b，FENG Kun1c，GUO Jiayi1d，GUO Malong1e，CUI Hongxun1f，DING Zhen2. Design of Centralized Control System for Fumigation Bed. China Medical Devices, 2021, 36(2): 30-33.
