CN102028996A - Method and device for regulating output pressure of respirator decompressor - Google Patents
Method and device for regulating output pressure of respirator decompressor Download PDFInfo
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- CN102028996A CN102028996A CN2009102356344A CN200910235634A CN102028996A CN 102028996 A CN102028996 A CN 102028996A CN 2009102356344 A CN2009102356344 A CN 2009102356344A CN 200910235634 A CN200910235634 A CN 200910235634A CN 102028996 A CN102028996 A CN 102028996A
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Abstract
The invention provides a method for regulating the output pressure of a respirator decompressor, comprising the following steps of: setting the target value of the output pressure of the respirator decompressor; taking the difference of the target value and the measured practical value of the output pressure as a pressure bias value; and regulating output voltage according to the pressure bias value. The invention also provides a device for regulating the output pressure of the respirator decompressor, comprising a setting module, a calculation module and a regulation module, wherein the setting module is used for setting the target value of the output pressure of the respirator decompressor; the calculation module is used for taking the difference of the target value and the measured practical value of the output pressure as the pressure bias value; and the regulation module is used for regulating the output pressure according to the pressure bias value. The output pressure of the respirator decompressor can be regulated within certain range by the invention so as to satisfy the requirements of different applications.
Description
Technical field
The present invention relates to medical instruments field, in particular to a kind of control method and device of output pressure of respirator decompressor.
Background technology
In the product design of pneumatic electronic control type respirator, often needing to use air relief valve provides stable operating pressure, and air-path control system can be realized comparatively accurate flow-control according to this pressure.
At present, comparatively common pressure control scheme is to adopt the air relief valve output fixation pressure of mechanical adjustment (people manually regulates) in advance, and adjustment process need be used special equipment, in case set up, this output pressure is just immutable in theory.Because the air flow rate FLOW=pressure P/adjustable resistance R of respirator control, when the output pressure P of air relief valve was constant, the range of accommodation of air flow rate FLOW was by the range of accommodation decision of resistance R, but often the range of accommodation of R is limited.If want to realize large-scale Flow-rate adjustment, depend merely on fixed output pressure P and be difficult to reach.
The inventor finds that there are the following problems at least in the prior art: the output pressure of existing respirator decompressor is fixed, can't regulate according to the duty of system.
Summary of the invention
The present invention aims to provide a kind of control method and device of output pressure of respirator decompressor, and the output pressure that can solve existing respirator decompressor is fixed, the problem that can't regulate according to the duty of system.
In an embodiment of the present invention, provide a kind of control method of output pressure of respirator decompressor, having comprised: the desired value of setting the output pressure of respirator decompressor; With the difference of desired value and the actual value of the output pressure that records as the pressure divergence value; Regulate output pressure according to the pressure divergence value.
Preferably, desired value is to preestablish or set by the duty of analyzing respirator.
Preferably, regulating output pressure according to the pressure divergence value specifically comprises: whether the error of judging the pressure divergence value is in ± 2% scope; If not, then regulating output pressure is:
Wherein, r (t) is the desired value of output pressure, and y (t) is the actual value of output pressure, and e (t) is the pressure divergence value, and u (t) is an output pressure, K
PBe proportionality coefficient, T
IBe integration time constant, T
DBe derivative time constant.
Preferably, output pressure is 20KPa~250KPa.
In an embodiment of the present invention, also provide a kind of adjusting device of output pressure of respirator decompressor, having comprised: setting module is used to set the desired value of the output pressure of respirator decompressor; Computing module is used for difference with desired value and the actual value of the output pressure that records as the pressure divergence value; Adjustment module is used for regulating output pressure according to the pressure divergence value.
Preferably, desired value is to preestablish or set by the duty of analyzing respirator.
Preferably, adjustment module is regulated output pressure according to the pressure divergence value and specifically comprised: whether the error of judging the pressure divergence value is in ± 2% scope; If not, then regulating output pressure is:
Wherein, r (t) is the desired value of output pressure, and y (t) is the actual value of output pressure, and e (t) is the pressure divergence value, and u (t) is an output pressure, K
PBe proportionality coefficient, T
IBe integration time constant, T
DBe derivative time constant.
Preferably, output pressure is 20KPa~250KPa.
Because utilizing the desired value of output pressure of respirator decompressor and the deviation between the actual value regulates output pressure, the output pressure that has solved existing respirator decompressor is fixed, the problem that can't regulate according to the duty of system, thereby can make the output pressure of respirator decompressor regulate within the specific limits, satisfy needs of different applications.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 shows the flow chart according to the control method of the output pressure of the respirator decompressor of the embodiment of the invention;
Fig. 2 has gone out the sketch map according to the adjusting device of the output pressure of the respirator decompressor of the embodiment of the invention;
Fig. 3 shows the structural representation of respirator decompressor according to the preferred embodiment of the invention;
Fig. 4 shows the flow chart of the control method of the output pressure of respirator decompressor according to the preferred embodiment of the invention.
The specific embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
Fig. 1 shows the flow chart according to the control method of the output pressure of the respirator decompressor of the embodiment of the invention, may further comprise the steps:
Step S10, the desired value of the output pressure of setting respirator decompressor;
Step S20, with the difference of the desired value of output pressure and the actual value of the output pressure that records as the pressure divergence value;
Step S30 regulates output pressure according to the pressure divergence value.
This embodiment utilizes the desired value of output pressure of respirator decompressor and the deviation between the actual value that output pressure is regulated, the output pressure that has solved existing respirator decompressor is fixed, the problem that can't regulate according to the duty of system, thereby can make the output pressure of respirator decompressor regulate within the specific limits, satisfy needs of different applications.
Preferably, the desired value of output pressure is to preestablish or set by the duty of analyzing respirator.For example set the desired value of the output pressure of respirator decompressor, can satisfy the different demands of practical clinical like this by the type of analyzing the patient, patient's situation etc.
Preferably, step S30 specifically comprises: whether the error of judging the pressure divergence value is in ± 2% scope; If not, then regulating output pressure is:
Wherein, r (t) is the desired value of output pressure, and y (t) is the actual value of output pressure, and e (t) is the pressure divergence value, and u (t) is an output pressure, K
PBe proportionality coefficient, T
IBe integration time constant, T
DBe derivative time constant.
The preferred embodiment provides the specific embodiments of regulating output pressure according to the desired value of the output pressure of respirator decompressor and actual value according to pid control algorithm.In actual applications, the range of error of setting pressure deviate is ± 2%, when judging the pressure divergence value in this scope the time, thinks that then current output pressure meets the requirements; When judging the pressure divergence value outside this scope the time, think that then current output pressure is undesirable, need regulate according to above-mentioned algorithm output pressure.
Preferably, the output pressure of respirator decompressor can be adjusted in 20KPa~250KPa scope.
Above preferred embodiment can be applicable in the pressure control of respirator, anesthetic machine, can provide adjustable pressure control device for respirator, anesthetic machine, implementation method is simple, control is reliable, with low cost, can obviously improve the flow-control effect of respirator, anesthetic machine.
Fig. 2 has gone out the sketch map according to the adjusting device of the output pressure of the respirator decompressor of the embodiment of the invention, and this device comprises: setting module 10 is used to set the desired value of the output pressure of respirator decompressor; Computing module 20 is used for difference with the desired value of output pressure and the actual value of the output pressure of the respirator decompressor that records as the pressure divergence value; Adjustment module 30 is used for regulating output pressure according to the pressure divergence value.
This embodiment utilizes the desired value of output pressure of respirator decompressor and the deviation between the actual value that output pressure is regulated, the output pressure that has solved existing respirator decompressor is fixed, the problem that can't regulate according to the duty of system, thereby can make the output pressure of respirator decompressor regulate within the specific limits, satisfy needs of different applications.
Preferably, the desired value of output pressure is to preestablish or set by the duty of analyzing respirator.For example set the desired value of the output pressure of respirator decompressor, can satisfy the different demands of practical clinical like this by the type of analyzing the patient, patient's situation etc.
Preferably, adjustment module 30 is regulated output pressure according to the pressure divergence value and specifically comprised: whether the error of judging the pressure divergence value is in ± 2% scope; If not, then regulating output pressure is:
Wherein, r (t) is the desired value of output pressure, and y (t) is the actual value of output pressure, and e (t) is the pressure divergence value, and u (t) is an output pressure, K
PBe proportionality coefficient, T
IBe integration time constant, T
DBe derivative time constant.
The specific embodiments that the preferred embodiment provides adjustment module 30 to regulate output pressure according to pid control algorithm according to the desired value and the actual value of the output pressure of respirator decompressor.In actual applications, the range of error of setting pressure deviate is ± 2%, when judging the pressure divergence value in this scope the time, thinks that then current output pressure meets the requirements; When judging the pressure divergence value outside this scope the time, think that then current output pressure is undesirable, need regulate according to above-mentioned algorithm output pressure.
Preferably, the output pressure of respirator decompressor can be adjusted in 20KPa~250KPa scope.
Fig. 3 shows the structural representation of respirator decompressor according to the preferred embodiment of the invention, and this respirator decompressor comprises: source of the gas 1, air relief valve 2, motor 3, pressure transducer 4, electric machine controller 5 and shaft joint 6.
Wherein, source of the gas 1 is the power source of pneumatic electronic control type respirator, is generally air or oxygen;
e(t)=r(t)-y(t) (1)
Pid control algorithm is:
Wherein, r (t) is the desired value of output pressure, and y (t) is the actual value of output pressure, and e (t) is the pressure divergence value, and u (t) is an output pressure, K
PBe proportionality coefficient, T
IBe integration time constant, T
DBe derivative time constant.
Shaft joint 6 connects motor 3 and air relief valve 2.
And wherein the desired value of output pressure is set in the host computer of respirator.In the preferred embodiment, host computer plays the function of above-mentioned setting module 10, and electric machine controller 5, motor 3 and shaft joint 6 play the function of computing module 20 and adjustment module 30 jointly.
The idiographic flow (as shown in Figure 4) of the control method of output pressure is described below in conjunction with respirator decompressor as shown in Figure 3:
Step S102, the desired value of setting output pressure in host computer.
Step S104, electric machine controller obtains the desired value of output pressure according to host computer instruction, and wherein desired value is carried in the host computer instruction.
Step S106, electric machine controller judges according to the actual value of the output pressure of pressure transducer feedback whether current pressure control meets the requirements, if then withdraw from flow process.In actual applications, can be set at error as pressure divergence value e (t) in ± 2% scope the time, meet the requirements.
Step S108 if not, then adjusts motor position according to pressure divergence value e (t) according to above-mentioned formula (2), output pressure is met the requirements, and change step S106 over to.
The output pressure of existing respirator decompressor is fixed as 250KPa or 160KPa, and output pressure can be adjusted in 20KPa~250KPa scope after using above preferred embodiment, thereby can satisfy needs of different applications.The preferred embodiment can protect the patient to use the safety of respirator, and the method for avoiding single failure is provided.In the application of comprehensive respirators such as adult, baby, anesthetic machine, can satisfy the different demands of practical clinical better.
From above description, as can be seen, the above embodiments of the present invention have realized following technique effect: owing to utilize the desired value of output pressure of respirator decompressor and the deviation between the actual value that output pressure is regulated, the output pressure that has solved existing respirator decompressor is fixed, the problem that can't regulate according to the duty of system, thereby can make the output pressure of respirator decompressor regulate within the specific limits, satisfy needs of different applications.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. the control method of the output pressure of a respirator decompressor is characterized in that, comprising:
Set the desired value of the output pressure of respirator decompressor;
With the difference of described desired value and the actual value of the described output pressure that records as the pressure divergence value;
Regulate described output pressure according to described pressure divergence value.
2. control method according to claim 1 is characterized in that, described desired value is to preestablish or set by the duty of analyzing described respirator.
3. control method according to claim 1 is characterized in that, regulates described output pressure according to described pressure divergence value and specifically comprises:
Whether the error of judging described pressure divergence value is in ± 2% scope;
If not, then regulating described output pressure is:
4. control method according to claim 1 is characterized in that, described output pressure is 20KPa~250KPa.
5. the adjusting device of the output pressure of a respirator decompressor is characterized in that, comprising:
Setting module is used to set the desired value of the output pressure of respirator decompressor;
Computing module is used for difference with described desired value and the actual value of the described output pressure that records as the pressure divergence value;
Adjustment module is used for regulating described output pressure according to described pressure divergence value.
6. adjusting device according to claim 5 is characterized in that, described desired value is to preestablish or set by the duty of analyzing described respirator.
7. adjusting device according to claim 5 is characterized in that, described adjustment module is regulated described output pressure according to described pressure divergence value and specifically comprised:
Whether the error of judging described pressure divergence value is in ± 2% scope;
If not, then regulating described output pressure is:
8. adjusting device according to claim 5 is characterized in that, described output pressure is 20KPa~250KPa.
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CN103071214A (en) * | 2011-10-25 | 2013-05-01 | 北京航天长峰股份有限公司 | Method for controlling respirator output oxygen concentration |
CN103920214A (en) * | 2014-04-28 | 2014-07-16 | 深圳市帝迈生物技术有限公司 | Breathing machine and breathing pressure regulating control system and regulating control method thereof |
CN104615170A (en) * | 2014-12-30 | 2015-05-13 | 河南西瑞医疗电子技术有限公司 | Accurate pneumatic control method for voice coil motor |
CN105944197A (en) * | 2016-05-16 | 2016-09-21 | 湖南明康中锦医疗科技发展有限公司 | Open-loop control method and system of fan of breathing machine |
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CH568756A5 (en) * | 1973-09-07 | 1975-11-14 | Hoffmann La Roche | |
SE9903467D0 (en) * | 1999-09-24 | 1999-09-24 | Siemens Elema Ab | Feedback control of mechanical breathing aid gas flow |
AU2008203812B2 (en) * | 2007-08-17 | 2014-10-02 | ResMed Pty Ltd | Methods and Apparatus for Pressure Therapy in the Treatment of Sleep Disordered Breathing |
CN201088762Y (en) * | 2007-10-24 | 2008-07-23 | 诸宝荣 | Digital oxygen flow quantity pulse-controller |
CN101468223B (en) * | 2007-12-29 | 2012-04-11 | 北京谊安医疗***股份有限公司 | Method for improving working accuracy of PEEP valve |
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CN103071214A (en) * | 2011-10-25 | 2013-05-01 | 北京航天长峰股份有限公司 | Method for controlling respirator output oxygen concentration |
CN103920214A (en) * | 2014-04-28 | 2014-07-16 | 深圳市帝迈生物技术有限公司 | Breathing machine and breathing pressure regulating control system and regulating control method thereof |
CN104615170A (en) * | 2014-12-30 | 2015-05-13 | 河南西瑞医疗电子技术有限公司 | Accurate pneumatic control method for voice coil motor |
CN105944197A (en) * | 2016-05-16 | 2016-09-21 | 湖南明康中锦医疗科技发展有限公司 | Open-loop control method and system of fan of breathing machine |
CN105944197B (en) * | 2016-05-16 | 2018-09-14 | 湖南明康中锦医疗科技发展有限公司 | The open-loop control method and system of lung ventilator wind turbine |
CN109621114A (en) * | 2018-12-17 | 2019-04-16 | 湖南城市学院 | A kind of mechanical ventilation mode, pressure control method |
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