Research On Medical Gas Monitoring And Gas Source Unit Optimization Control

Medical oxygen,medical vacuum suction,medical compressed air and other medical gases are known as “life support system”,whose standardization,safety,reliability and rationality are directly related to the patients' lives safety.A complete medical gas monitoring and control system is already essential for large and medium-sized hospitals which can achieve the goal of systematic monitoring for the use of medical gas and gas supply conditions,and can also alarm in time when system failure occurred to ensure patients' safety.This paper is based on the study of advanced technology at home and abroad and the actual investigation and research of self-technical research.And it aims at the international forefront of the medical gas monitoring and control.The existing medical gas monitoring system has three problems: 1)the function of medical gas monitoring collection node is too simple which is disadvantageous to the networking;the way of network communication has many limitations;2)the layout of the monitoring structure is unreasonable,there is no structure can cover large and medium-sized hospital;3)the motors of air pressure and oxygen production units' operating time distribution is irrational that could lead to uneven wear and tear and other technical problems.Under such circumstances,a medical gas monitoring system and a gas source optimization control method are developed to meet the need of medical gas monitoring and gas source control.The specific research work of this paper are as follows:(1)The medical gas monitoring and control structure based on fiber optic ring network is proposed,which connect the gas using area and monitoring center with multi-mode fiber optic ring network according to the characteristics of multi-mode fiber.This way of communication can reach 5km transmission distance,that covering the whole range of large and medium-sized hospitals;the bit rate of transmission is up to 100Mbit/s;the transmission speed,transmission bandwidth and transmission distance are greatly improved compared with the method of using the field bus to connect with the gas using area and the monitoring center,and the anti-interference ability is very strong(because strong electromagnetic and frequency converter interference do not work for the optical signal);the form of the ring network to connect the optical fiber improves the reliability of the communication.In the monitoring process,if the multi-mode fiber breaks somewhere due to a certain situation,the optical fiber ring network breaks into the ordinary optical fiber line,but the optical signal can still be transmit in the optical fiber line to ensure the normal communication.(2)The design and manufacture of medical gas regional monitoring alarm and regional monitoring panel.The regional monitoring alarm is designed as a medical gas monitoring node,which can be modular combined.Regional monitoring alarm contains a microprocessor inside,it not only can display the pressure or flow data measured by the transmitter in digital mode real-timely and judge the alarm,but also overcomes the shortcomings of the electrical contact pressure gauge that cannot be networked.The regional monitoring panel is used to display centrally the data collected by all the regional monitoring nodes in a certain monitoring area.If the gas data of some monitoring node is abnormal,the regional monitoring panel can alarm and display the abnormal position.You can set the gas upper and lower threshold by operating on the touch screen directly,besides it has the function of data storage and historical data query.(3)Build and achieve optimal control method of gas source medical gas generating unit.Nowadays,gas source motor unit optimization control is basically in the blank stage,so that the gas source motor unit lack scientific and rational operating time allocation,which leads to the wears and tears of the medical gas generate motor units are not proportionate,and the service lives of the motors are too different,those all make it easy to produce malfunction.This paper is based on the optimal control algorithm named as genetic algorithm,combines the theory and practice,and makes a reasonable and rational application in the optimization control of medical gas generating motor units.According to the original wear and tear characteristics of the motor units,we allocate the number and operating time of the motors scientifically and rationally,to minimize and balance the wear and tear of the motors for a long time safe and reliable operation of the motor units.The research in this paper not only developed the regional monitoring alarm and regional monitoring panel with networking function and more diversified functions,but also developed the medical gas monitoring and control structure with more reasonable structure layout.What's more,the research successfully applies the multi-objective genetic algorithm to the optimal distribution and control of the gas source unit,thus improving the reliability and safety of the gas unit operation,which have a high application value.