Method for controlling pressure of anesthesia machine and breathing machine in suction valve and expiration valve cooperative control mode

A pressure control and collaborative control technology, applied in the direction of electric fluid pressure control, respirator, electric controller, etc., can solve problems such as pressure increase, and achieve the effect of improving comfort

Active Publication Date: 2012-04-04
航天长峰医疗科技(成都)有限公司
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  • Claims
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Problems solved by technology

[0007] In order to solve the problem of pressure increase caused by the outside world after the air supply flow rate of anesthesia machine and ventilator drops to 0LPM during pressure c

Method used

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  • Method for controlling pressure of anesthesia machine and breathing machine in suction valve and expiration valve cooperative control mode
  • Method for controlling pressure of anesthesia machine and breathing machine in suction valve and expiration valve cooperative control mode

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Embodiment Construction

[0020] figure 1 As shown, the anesthesia machine and ventilator pressure control method of the inhalation valve and the exhalation valve cooperative control of the present invention include: the inhalation valve uses the fuzzy PID controller to control the inhalation valve pressure according to the traditional flow pressure cooperative fuzzy control method. flow control;

[0021] Use pressure PID control to control the pressure of the exhalation valve;

[0022] Coordinate the relationship between the two valves, and adjust the relationship between the two valves to an optimal state by fine-tuning the PID control parameters of the inhalation valve and the exhalation valve and the Kalman feedback estimation coefficient.

[0023] During the control process, the inhalation and exhalation valves are simultaneously controlled. The pressure feedback control is carried out according to the coordinated relationship between the inhalation and exhalation flow sensors, the pressure sens...

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Abstract

The invention discloses a method for controlling pressure of an anesthesia machine and a breathing machine in a suction valve and expiration valve cooperative control mode, which is characterized by comprising the following steps of: performing flow rate estimation fuzzy control on suction valve pressure by the traditional flow and pressure cooperative fuzzy control method in a pressure control mode; monitoring a pressure variation condition in a system by using a pressure sensor, transmitting the pressure variation condition in the system to an expiration valve control unit and calculating an expiration valve control deviation; performing proportion integration differentiation (PID) control on set suction pressure through the pressure sensor in the suction process and performing the PID control on positive end expiration pressure in the expiration process by using an expiration valve; and grading expiration valve PID control parameters according to required focus points in the grading range of 1cm H2O to 80cm H2O, fitting the PID control parameters under the pressure at the focus points by a curve fitting method or a broken line approximate method, and synchronously controlling a suction valve and the expiration valve in the control process.

Description

technical field [0001] The invention relates to a high-performance and high-precision pressure control ventilation mode for realizing anesthesia machines and ventilators, and belongs to the technical field of medical equipment manufacturing. Background technique [0002] In the control of anesthesia machines and ventilators, pressure-controlled ventilation is required for some special patients. There are three known pressure control methods: [0003] The pressure PID control is used to directly control the pressure of the patient. The advantage of this method is that the algorithm is simple to implement, and the PID pressure control realized by using a high-performance processor can be used for most patients with special diseases. The disadvantage is that for patients with different lesions, their own R and C values ​​are different. Using the traditional pressure control method to control the entire system based solely on the monitored pressure cannot well adapt to pressure...

Claims

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Application Information

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IPC IPC(8): A61M16/00A61M16/01G05D16/20G05B11/42
Inventor 刁俊
Owner 航天长峰医疗科技(成都)有限公司
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