CN114042214A - Automatic pressure regulating method for auxiliary breathing machine - Google Patents

Automatic pressure regulating method for auxiliary breathing machine Download PDF

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Publication number
CN114042214A
CN114042214A CN202111292260.7A CN202111292260A CN114042214A CN 114042214 A CN114042214 A CN 114042214A CN 202111292260 A CN202111292260 A CN 202111292260A CN 114042214 A CN114042214 A CN 114042214A
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energy storage
voltage
storage unit
auxiliary
respirator
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杜春玲
刘哲
吴超民
宋元林
粟锦平
周磊
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Hunan Ventmed Medical Technology Co Ltd
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Hunan Ventmed Medical Technology Co Ltd
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/021—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes operated by electrical means
    • A61M16/022—Control means therefor
    • A61M16/024—Control means therefor including calculation means, e.g. using a processor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3331—Pressure; Flow

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Abstract

The invention relates to the technical field of respirator pressure regulation, and discloses an automatic pressure regulating method for an auxiliary respirator, which comprises the following steps: according to the topological structure of the automatic pressure regulating unit of the auxiliary respirator, the power distribution of the energy storage unit in the topological structure is realized by utilizing an energy storage unit control strategy; adjusting the output voltage of an energy storage unit in the auxiliary respirator by using a voltage self-adaptive adjustment method, and compensating the output voltage of the energy storage unit in the auxiliary respirator by using a secondary translation method; optimizing the battery charge state of a power grid energy storage unit in the topological structure of the automatic voltage regulating unit; and detecting the voltage amplitude of a voltage detection point of the auxiliary respirator, and if the voltage amplitude of the detection point is higher than a preset threshold value, setting a pressure regulating time sequence of the auxiliary respirator and executing automatic pressure regulation of the auxiliary respirator. The method of the invention realizes the power distribution and the automatic voltage regulation of the auxiliary respirator by arranging the energy storage unit on the auxiliary respirator and utilizing the energy storage unit.

Description

Automatic pressure regulating method for auxiliary breathing machine
Technical Field
The invention relates to the technical field of pressure regulation of respirators, in particular to an automatic pressure regulation method for an auxiliary respirator.
Background
The auxiliary respirator is used for ICU treatment in an intensive care unit and belongs to important medical equipment. The pressure supporting level of the auxiliary respirator is up to 35cm H2And O, the phenomenon of oxygen deficiency of the patient can be avoided under the pressure control of the auxiliary ventilator. In order to optimally adjust and control the pressure of the auxiliary respirator, the pressure of the inlet and the outlet of the auxiliary respirator needs to be improved by combining a respirator pressure control method.
In the traditional respirator pressure regulating method, the control method of the auxiliary respirator mainly comprises an auxiliary respirator pressure regulating control method based on a fuzzy PID method and multidimensional parameter tracking identification and the like, the automatic pressure regulation of the auxiliary respirator is realized by combining the identification of the pressure parameter of the auxiliary respirator and the fusion of multidimensional parameter information, but the traditional method for pressure-sore-preventing cotton cover noninvasive respirator pressure regulation has poor adaptivity and poor convergence and needs a large amount of parameter calculation.
In view of the above, the invention provides an automatic pressure regulating method for an assisted breathing machine, which is characterized in that an energy storage unit is arranged on the assisted breathing machine, power distribution of the energy storage unit is realized by utilizing an energy storage unit control strategy, and the automatic pressure regulation of the assisted breathing machine is realized based on the energy storage unit.
Disclosure of Invention
The invention provides an automatic pressure regulating method of an auxiliary respirator, which aims to (1) realize automatic regulation of the voltage of the auxiliary respirator; (2) the charge-discharge efficiency in the auxiliary ventilator is optimized.
The invention provides an automatic pressure regulating method of an auxiliary respirator, which comprises the following steps:
s1: according to the topological structure of the automatic pressure regulating unit of the auxiliary respirator, the power distribution of the energy storage unit in the topological structure is realized by utilizing an energy storage unit control strategy;
s2: adjusting the output voltage of an energy storage unit in the auxiliary respirator by using a voltage self-adaptive adjustment method, and compensating the output voltage of the energy storage unit in the auxiliary respirator by using a secondary translation method;
s3: optimizing the battery charge state of a power grid energy storage unit in the topological structure of the automatic voltage regulating unit;
s4: and detecting the voltage amplitude of a voltage detection point of the auxiliary respirator, and if the voltage amplitude of the detection point is higher than a preset threshold value, setting a pressure regulating time sequence of the auxiliary respirator and executing automatic pressure regulation of the auxiliary respirator.
As a further improvement of the method of the invention:
in the step S1, establishing an automatic pressure regulating unit topology of the assisted breathing machine, including:
the automatic voltage regulation unit topological structure of the auxiliary respirator comprises a plurality of energy storage units, the energy storage units are connected into an interconnected converter through converters of respective interfaces, and the interconnected converter limits the control range of automatic voltage regulation to 4-18 cm H2O。
In the step S1, the power distribution of the energy storage unit in the topology structure of the automatic voltage regulation unit is implemented by using an energy storage unit control strategy, including:
the power of the auxiliary breathing machine is as follows:
Pm＝-PV-cft
wherein:
p represents the rated power of the assisted ventilator;
m represents the power temperature coefficient of the auxiliary ventilator;
v represents ventilation of the assisted ventilator;
c represents the output pressure of the assisted ventilator;
t represents the inspiration time using the assisted ventilator;
f represents the breathing frequency using an assisted ventilator;
acquiring parameters of the auxiliary ventilator in real time, wherein the parameters comprise ventilation capacity of the auxiliary ventilator, output pressure of the auxiliary ventilator, inspiration time using the auxiliary ventilator and breathing frequency using the auxiliary ventilator, and calculating to obtain real-time power of the auxiliary ventilator:
mapping real-time power Pm of an assisted ventilator to a plurality of energy storage units, wherein the energy storage units are set as R ═ { R ═ R1，R2，R3，...，Ri，...，RnWhere n denotes the number of energy storing cells in the assisted ventilator, RiRepresenting the ith energy storage unit in the energy storage units;
and realizing the power distribution of the energy storage unit by using the energy storage unit control strategy, wherein the power distribution formula of the energy storage unit is as follows:
Wi＝-PmVsinθi+Pili
wherein:
θirepresenting the real-time power mapping of the assisted ventilator to the ith energy storage unit RiIn an embodiment of the present invention, the mapping angle is an acute angle between an incoming current of the assisted ventilator and the energy storage unit;
Pidenotes an energy storage unit RiThe rated power of (d);
Widenotes an energy storage unit RiActual allocated power of;
lidenotes an energy storage unit RiThe starting pressure of (1).
In the step S2, adaptively adjusting the output voltage of the energy storage unit in the assisted breathing machine includes:
the method comprises the following steps of adjusting the output voltage of an energy storage unit in the auxiliary breathing machine by using a voltage self-adaptive adjusting method, wherein the formula of the voltage self-adaptive adjusting method is as follows:
ω′i＝ωi-ωG(ωi)Wi
U′i＝Ui-UG(ω′i)
wherein:
ωiis an energy storage unit RiThe initial angular frequency of (a);
ω′iis an energy storage unit RiAdaptively adjusting the adjusted angular frequency;
omega represents the angular frequency of the auxiliary ventilator, U represents the voltage amplitude of the auxiliary ventilator;
G(ωi) Representation based on angular frequency ωiThe PI transfer function of (1);
Uiis an energy storage unit RiOf initial voltage amplitude, U'iIs an energy storage unit RiAnd adaptively adjusting the voltage amplitude.
In the step s2, compensating the output voltage of the energy storage unit in the assisted breathing machine by using a quadratic translation method, including:
the process of compensating the output voltage of the energy storage unit in the assisted breathing machine by using the secondary translation method comprises the following steps:
a voltage regulating transformer and a series transformer which are connected with an energy storage unit are arranged in an automatic voltage regulating unit topological structure of the auxiliary respirator;
calculating secondary translation value delta U of energy storage unit voltage in auxiliary breathing machinei：
Figure BDA0003335242960000021
Wherein:
k1the transformation ratio of the voltage regulating transformer is represented, and the size of the transformation ratio can be adjusted by changing the connection of the thyristor on-load tap changer and the secondary side tap of the voltage regulating transformer;
k2representing the transformation ratio of the series transformer, and setting the transformation ratio to be a fixed value 2;
U′iis an energy storage unit RiAdaptively adjusting the adjusted voltage amplitude;
the compensated output voltage value of the energy storage unit is:
Figure BDA0003335242960000022
wherein:
Figure BDA0003335242960000023
representing compensated energy storage unit RiThe output voltage value of (1);
s represents a compensation control unit, s is {0,1}, and represents boost compensation when s is 0 and represents buck compensation when s is 1;
and setting a reference voltage value of the energy storage unit so that the compensated output voltage value reaches a preset reference voltage value.
In the step S3, optimizing the battery state of charge of the power grid energy storage unit includes:
setting a control mode of an alternating current power grid in an automatic voltage regulating unit topological structure, and taking the alternating current power grid as a power grid energy storage unit; optimizing the battery state of charge in the power grid energy storage unit by using a battery state of charge optimization algorithm, wherein the battery state of charge optimization process comprises the following steps:
1) adjusting the voltage value of the power grid energy storage unit by using a secondary adjustment method, and calculating a charging voltage threshold u when the power grid energy storage unit is switched from a charging state to a discharging state1And calculating the discharge rate of the energy storage unit of the power grid under different voltage values and the discharge voltage threshold u2(ii) a In an embodiment of the invention, when the voltage value of the energy storage unit of the power grid exceeds the charging voltage threshold u1If the voltage value of the energy storage unit of the power grid reaches the discharge voltage threshold u, the auxiliary respirator enters a discharge state2If the discharge rate of the auxiliary ventilator reaches the maximum value, the discharge rate of the auxiliary ventilator reaches the maximum value;
2) adjusting the voltage value of the power grid energy storage unit by utilizing a secondary adjustment method in real time to enable the voltage value of the power grid energy storage unit to be in an interval (u)1,u2](ii) a In a specific embodiment of the invention, the secondary regulation rate of the power grid energy storage unit is 10 times/second;
3) if the voltage value of the power grid energy storage unit exceeds the discharge voltage threshold u2And then closing the secondary regulation of the power grid energy storage unit.
And in the step S4, setting a voltage detection point on the auxiliary respirator, detecting the voltage amplitude of the voltage detection point of the auxiliary respirator, and judging whether the voltage amplitude of the current voltage detection point needs to regulate the voltage of the auxiliary respirator, wherein the method comprises the following steps:
setting a voltage detection point at the auxiliary respirator, setting a voltage detection upper and lower line preset value, detecting the voltage amplitude of the output voltage of the auxiliary respirator at the voltage detection point, comparing the voltage amplitude with the voltage detection upper and lower line preset value, if the voltage amplitude of the detection point is in the voltage detection upper and lower line preset value interval, indicating that the auxiliary respirator is normal in voltage, and not needing to perform auxiliary respirator voltage regulation operation, otherwise, under the condition of controlling the auxiliary respirator discharge rate in a reasonable interval, distributing the auxiliary respirator power to a plurality of energy storage units, wherein the energy storage units execute the voltage regulation operation, and the voltage regulation operation comprises a self-adaptive voltage regulation method and a voltage compensation method based on a secondary translation method.
And the step S4 is that a pressure regulating time sequence of the auxiliary respirator is set, and automatic pressure regulation of the auxiliary respirator is executed, and the method comprises the following steps:
establishing an objective function of the pressure regulating time sequence of the auxiliary breathing machine, wherein the objective function of the pressure regulating time sequence of the auxiliary breathing machine is as follows:
Figure BDA0003335242960000031
wherein:
f represents the price of electric energy;
Widenotes an energy storage unit RiActual allocated power of;
delta d represents the pressure regulating interval of the auxiliary respirator;
t represents the pressure regulation period of the auxiliary ventilator;
and generating a plurality of groups of auxiliary breathing machine data, inputting the generated data into an objective function, calculating to obtain a minimum voltage regulation period T, and executing voltage regulation operation in the next voltage regulation period if the auxiliary breathing machine voltage regulation is required to be executed.
Compared with the prior art, the invention provides an automatic pressure regulating method of an auxiliary respirator, which has the following advantages:
firstly, this scheme provides an energy storage unit control strategy, through set up a plurality of energy storage units in the auxiliary ventilator, acquires the parameter of auxiliary ventilator in real time, including auxiliary ventilator rated power, ventilation capacity, auxiliary ventilator's output pressure, the breathing frequency that uses auxiliary ventilator's the time of breathing in and use auxiliary ventilator, calculates the real-time power who obtains auxiliary ventilator: mapping real-time power of an assisted ventilator to a plurality of energy storage units, the set of energy storage units being R ═ { R ═ R1,R2,R3,…,Ri,…,RnWhere n denotes the number of energy storing cells in the assisted ventilator, RiRepresenting the ith energy storage unit in the energy storage units; by using energy storage sheetsThe meta-control strategy realizes the power distribution of the energy storage unit, and then the power distribution formula of the energy storage unit is as follows:
Wi＝-PmVsinθi+Pili
wherein: thetaiRepresenting the real-time power mapping of the assisted ventilator to the ith energy storage unit RiThe mapping angle of (d); piDenotes an energy storage unit RiThe rated power of (d); wiDenotes an energy storage unit RiActual allocated power of; liDenotes an energy storage unit RiThe starting pressure of (a); therefore, the power of the auxiliary breathing machine is distributed to the energy storage units, and the power of each energy storage unit is smaller than that of the auxiliary breathing machine in a power mapping distribution mode, so that the safe operation of the auxiliary breathing machine is prevented from being damaged by high voltage.
Meanwhile, the scheme provides two automatic voltage regulation methods, a voltage detection point is arranged on the auxiliary respirator, a voltage detection upper line and lower line preset value is arranged, the voltage amplitude of the output voltage of the auxiliary respirator is detected at the voltage detection point and compared with the voltage detection upper line and lower line preset values, if the voltage amplitude of the detection point is in a voltage detection upper line and lower line preset value interval, the voltage of the auxiliary respirator is normal, the auxiliary respirator is not required to be subjected to voltage regulation operation, otherwise, under the condition that the discharge rate of the auxiliary respirator is controlled in a reasonable interval, the power of the auxiliary respirator is distributed to a plurality of energy storage units, the energy storage units execute the voltage regulation operation, and the voltage regulation operation comprises an adaptive voltage regulation method and a voltage compensation method based on a secondary translation method. The formula of the voltage self-adaptive adjusting method is as follows:
ω′i＝ωi-ωG(ωi)Wi
U′i＝Ui-UG(ω′i)
wherein: omegaiIs an energy storage unit RiThe initial angular frequency of (a); omega'iIs an energy storage unit RiAdaptively adjusting the adjusted angular frequency; omega represents the angular frequency of the auxiliary ventilator, U represents the voltage amplitude of the auxiliary ventilator; g (omega)i) Representation based on angular frequency ωiThe PI transfer function of (1);Uiis an energy storage unit RiOf initial voltage amplitude, U'iIs an energy storage unit RiThe voltage amplitude after self-adaptive adjustment is adjusted by the voltage self-adaptive adjustment method based on the angular frequency of the voltage, so that the energy consumption of subsequent voltage compensation is reduced. The process of compensating the output voltage of the energy storage unit in the assisted breathing machine by using the secondary translation method comprises the following steps: a voltage regulating transformer and a series transformer which are connected with an energy storage unit are arranged in an automatic voltage regulating unit topological structure of the auxiliary respirator; calculating secondary translation value delta U of energy storage unit voltage in auxiliary breathing machinei：
Figure BDA0003335242960000041
Wherein: k is a radical of1The transformation ratio of the voltage regulating transformer is represented, and the size of the transformation ratio can be adjusted by changing the connection of the thyristor on-load tap changer and the secondary side tap of the voltage regulating transformer; k is a radical of2Representing the transformation ratio of the series transformer, and setting the transformation ratio to be a fixed value 2; u'iIs an energy storage unit RiAdaptively adjusting the adjusted voltage amplitude; the compensated output voltage value of the energy storage unit is:
Figure BDA0003335242960000042
Figure BDA0003335242960000043
representing compensated energy storage unit RiThe output voltage value of (1); s represents a compensation control unit, s is {0,1}, and represents boost compensation when s is 0 and represents buck compensation when s is 1; and setting a reference voltage value of the energy storage unit so that the compensated output voltage value reaches a preset reference voltage value. Compared with the traditional scheme, the scheme realizes the automatic pressure regulation of the auxiliary respirator by providing a two-stage self-adaptive voltage regulation method.
Drawings
Fig. 1 is a schematic flow chart illustrating an automatic pressure regulating method for an assisted ventilator according to an embodiment of the present invention;
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
S1: and according to the topological structure of the automatic pressure regulating unit of the auxiliary respirator, the power distribution of the energy storage unit in the topological structure is realized by utilizing an energy storage unit control strategy.
In the step S1, establishing an automatic pressure regulating unit topology of the assisted breathing machine, including:
the automatic voltage regulation unit topological structure of the auxiliary respirator comprises a plurality of energy storage units, the energy storage units are connected into an interconnected converter through converters of respective interfaces, and the interconnected converter limits the control range of automatic voltage regulation to 4-18 cm H2O。
In the step S1, the power distribution of the energy storage unit in the topology structure of the automatic voltage regulation unit is implemented by using an energy storage unit control strategy, including:
the power of the auxiliary breathing machine is as follows:
Pm＝-PV-cft
wherein:
p represents the rated power of the assisted ventilator;
m represents the power temperature coefficient of the auxiliary ventilator;
v represents ventilation of the assisted ventilator;
c represents the output pressure of the assisted ventilator;
t represents the inspiration time using the assisted ventilator;
f represents the breathing frequency using an assisted ventilator;
acquiring parameters of the auxiliary ventilator in real time, wherein the parameters comprise ventilation capacity of the auxiliary ventilator, output pressure of the auxiliary ventilator, inspiration time using the auxiliary ventilator and breathing frequency using the auxiliary ventilator, and calculating to obtain real-time power of the auxiliary ventilator:
mapping real-time power Pm of an assisted ventilator to a plurality of energy storage units, wherein the energy storage units are set as R ═ { R ═ R1，R2，R3，...，Ri，...，RnWhere n denotes the number of energy storing cells in the assisted ventilator, RiRepresenting the ith energy storage unit in the energy storage units;
and realizing the power distribution of the energy storage unit by using the energy storage unit control strategy, wherein the power distribution formula of the energy storage unit is as follows:
Wi＝-PmVsinθi+Pili
wherein:
θirepresenting the real-time power mapping of the assisted ventilator to the ith energy storage unit RiIn an embodiment of the present invention, the mapping angle is an acute angle between an incoming current of the assisted ventilator and the energy storage unit;
Pidenotes an energy storage unit RiThe rated power of (d);
Widenotes an energy storage unit RiActual allocated power of;
lidenotes an energy storage unit RiThe starting pressure of (1).
S2: and adjusting the output voltage of the energy storage unit in the auxiliary respirator by using a voltage self-adaptive adjusting method, and compensating the output voltage of the energy storage unit in the auxiliary respirator by using a secondary translation method.
In the step S2, adaptively adjusting the output voltage of the energy storage unit in the assisted breathing machine includes:
the method comprises the following steps of adjusting the output voltage of an energy storage unit in the auxiliary breathing machine by using a voltage self-adaptive adjusting method, wherein the formula of the voltage self-adaptive adjusting method is as follows:
ω′i＝ωi-ωG(ωi)Wi
U′i＝Ui-UG(ω′i)
wherein:
ωiis an energy storage unit RiThe initial angular frequency of (a);
ω′ito storeEnergy unit RiAdaptively adjusting the adjusted angular frequency;
omega represents the angular frequency of the auxiliary ventilator, U represents the voltage amplitude of the auxiliary ventilator;
G(ωi) Representation based on angular frequency ωiThe PI transfer function of (1);
Uiis an energy storage unit RiOf initial voltage amplitude, U'iIs an energy storage unit RiAnd adaptively adjusting the voltage amplitude.
In the step S2, compensating the output voltage of the energy storage unit in the assisted breathing machine by using a quadratic translation method, including:
the process of compensating the output voltage of the energy storage unit in the assisted breathing machine by using the secondary translation method comprises the following steps:
a voltage regulating transformer and a series transformer which are connected with an energy storage unit are arranged in an automatic voltage regulating unit topological structure of the auxiliary respirator;
calculating secondary translation value delta U of energy storage unit voltage in auxiliary breathing machinei：
Figure BDA0003335242960000051
Wherein:
k1the transformation ratio of the voltage regulating transformer is represented, and the size of the transformation ratio can be adjusted by changing the connection of the thyristor on-load tap changer and the secondary side tap of the voltage regulating transformer;
k2representing the transformation ratio of the series transformer, and setting the transformation ratio to be a fixed value 2;
U′iis an energy storage unit RiAdaptively adjusting the adjusted voltage amplitude;
the compensated output voltage value of the energy storage unit is:
Figure BDA0003335242960000052
wherein:
Figure BDA0003335242960000053
representing compensated energy storage unit RiThe output voltage value of (1);
s represents a compensation control unit, s is {0,1}, and represents boost compensation when s is 0 and represents buck compensation when s is 1;
and setting a reference voltage value of the energy storage unit so that the compensated output voltage value reaches a preset reference voltage value.
S3: and optimizing the battery charge state of the power grid energy storage unit in the automatic voltage regulation unit topological structure.
In the step S3, optimizing the battery state of charge of the power grid energy storage unit includes:
setting a control mode of an alternating current power grid in an automatic voltage regulating unit topological structure, and taking the alternating current power grid as a power grid energy storage unit; optimizing the battery state of charge in the power grid energy storage unit by using a battery state of charge optimization algorithm, wherein the battery state of charge optimization process comprises the following steps:
1) adjusting the voltage value of the power grid energy storage unit by using a secondary adjustment method, and calculating a charging voltage threshold u when the power grid energy storage unit is switched from a charging state to a discharging state1And calculating the discharge rate of the energy storage unit of the power grid under different voltage values and the discharge voltage threshold u2(ii) a In an embodiment of the invention, when the voltage value of the energy storage unit of the power grid exceeds the charging voltage threshold u1If the voltage value of the energy storage unit of the power grid reaches the discharge voltage threshold u, the auxiliary respirator enters a discharge state2If the discharge rate of the auxiliary ventilator reaches the maximum value, the discharge rate of the auxiliary ventilator reaches the maximum value;
2) adjusting the voltage value of the power grid energy storage unit by utilizing a secondary adjustment method in real time to enable the voltage value of the power grid energy storage unit to be in an interval (u)1,u2](ii) a In a specific embodiment of the invention, the secondary regulation rate of the power grid energy storage unit is 10 times/second;
3) if the voltage value of the power grid energy storage unit exceeds the discharge voltage threshold u2And then closing the secondary regulation of the power grid energy storage unit.
S4: and detecting the voltage amplitude of a voltage detection point of the auxiliary respirator, and if the voltage amplitude of the detection point is higher than a preset threshold value, setting a pressure regulating time sequence of the auxiliary respirator and executing automatic pressure regulation of the auxiliary respirator.
And in the step S4, setting a voltage detection point on the auxiliary respirator, detecting the voltage amplitude of the voltage detection point of the auxiliary respirator, and judging whether the voltage amplitude of the current voltage detection point needs to regulate the voltage of the auxiliary respirator, wherein the method comprises the following steps:
setting a voltage detection point at the auxiliary respirator, setting a voltage detection upper and lower line preset value, detecting the voltage amplitude of the output voltage of the auxiliary respirator at the voltage detection point, comparing the voltage amplitude with the voltage detection upper and lower line preset value, if the voltage amplitude of the detection point is in the voltage detection upper and lower line preset value interval, indicating that the auxiliary respirator is normal in voltage, and not needing to perform auxiliary respirator voltage regulation operation, otherwise, under the condition of controlling the auxiliary respirator discharge rate in a reasonable interval, distributing the auxiliary respirator power to a plurality of energy storage units, wherein the energy storage units execute the voltage regulation operation, and the voltage regulation operation comprises a self-adaptive voltage regulation method and a voltage compensation method based on a secondary translation method.
And the step S4 is that a pressure regulating time sequence of the auxiliary respirator is set, and automatic pressure regulation of the auxiliary respirator is executed, and the method comprises the following steps:
establishing an objective function of the pressure regulating time sequence of the auxiliary breathing machine, wherein the objective function of the pressure regulating time sequence of the auxiliary breathing machine is as follows:
Figure BDA0003335242960000061
wherein:
f represents the price of electric energy;
Widenotes an energy storage unit RiActual allocated power of;
delta d represents the pressure regulating interval of the auxiliary respirator;
t represents the pressure regulation period of the auxiliary ventilator;
and generating a plurality of groups of auxiliary breathing machine data, inputting the generated data into an objective function, calculating to obtain a minimum voltage regulation period T, and executing voltage regulation operation in the next voltage regulation period if the auxiliary breathing machine voltage regulation is required to be executed.
It should be noted that the above-mentioned numbers of the embodiments of the present invention are merely for description, and do not represent the merits of the embodiments. And the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, apparatus, article, or method that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, apparatus, article, or method. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, apparatus, article, or method that includes the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (8)

1. An automatic pressure regulating method for an assisted breathing machine, which is characterized by comprising the following steps:
s1: according to the topological structure of the automatic pressure regulating unit of the auxiliary respirator, the power distribution of the energy storage unit in the topological structure is realized by utilizing an energy storage unit control strategy;
s2: adjusting the output voltage of an energy storage unit in the auxiliary respirator by using a voltage self-adaptive adjustment method, and compensating the output voltage of the energy storage unit in the auxiliary respirator by using a secondary translation method;
s3: optimizing the battery charge state of a power grid energy storage unit in the topological structure of the automatic voltage regulating unit;
s4: and detecting the voltage amplitude of a voltage detection point of the auxiliary respirator, and if the voltage amplitude of the detection point is higher than a preset threshold value, setting a pressure regulating time sequence of the auxiliary respirator and executing automatic pressure regulation of the auxiliary respirator.
2. The method as claimed in claim 1, wherein the step S1 of establishing an automatic pressure regulating unit topology of the assisted breathing apparatus comprises:
the automatic voltage regulation unit topological structure of the auxiliary respirator comprises a plurality of energy storage units, the energy storage units are connected into an interconnected converter through converters of respective interfaces, and the interconnected converter limits the control range of automatic voltage regulation to 4-18 cm H2O。
3. The method as claimed in claim 2, wherein the step S1 of implementing power distribution of the energy storage unit in the topology of the automatic voltage regulation unit by using the energy storage unit control strategy comprises:
the power of the auxiliary breathing machine is as follows:
Pm＝-PV-cft
wherein:
p represents the rated power of the assisted ventilator;
m represents the power temperature coefficient of the auxiliary ventilator;
v represents ventilation of the assisted ventilator;
c represents the output pressure of the assisted ventilator;
t represents the inspiration time using the assisted ventilator;
f represents the breathing frequency using an assisted ventilator;
acquiring parameters of the auxiliary ventilator in real time, wherein the parameters comprise ventilation capacity of the auxiliary ventilator, output pressure of the auxiliary ventilator, inspiration time using the auxiliary ventilator and breathing frequency using the auxiliary ventilator, and calculating to obtain real-time power of the auxiliary ventilator:
mapping real-time power Pm of an assisted ventilator to a plurality of energy storage units, wherein the energy storage units are set as R ═ { R ═ R1,R2,R3,…,Ri,…,RnWhere n denotes the number of energy storing cells in the assisted ventilator, RiRepresenting the ith energy storage unit in the energy storage units;
and realizing the power distribution of the energy storage unit by using the energy storage unit control strategy, wherein the power distribution formula of the energy storage unit is as follows:
Wi＝-PmVsinθi+Pili
wherein:
θirepresenting the real-time power mapping of the assisted ventilator to the ith energy storage unit RiThe mapping angle of (d);
Pidenotes an energy storage unit RiThe rated power of (d);
Widenotes an energy storage unit RiActual allocated power of;
lidenotes an energy storage unit RiThe starting pressure of (1).
4. The method as claimed in claim 3, wherein the step S2 of adaptively adjusting the output voltage of the energy storage unit in the assisted breathing apparatus comprises:
the method comprises the following steps of adjusting the output voltage of an energy storage unit in the auxiliary breathing machine by using a voltage self-adaptive adjusting method, wherein the formula of the voltage self-adaptive adjusting method is as follows:
ω′i＝ωi-ωG(ωi)Wi
U′i＝Ui-UG(ω′i)
wherein:
ωiis an energy storage unit RiThe initial angular frequency of (a);
ω′iis an energy storage unit RiAdaptively adjusting the adjusted angular frequency;
omega represents the angular frequency of the auxiliary ventilator, U represents the voltage amplitude of the auxiliary ventilator;
G(ωi) Representation based on angular frequency ωiThe PI transfer function of (1);
Uiis an energy storage unit RiOf initial voltage amplitude, U'iIs an energy storage unit RiAnd adaptively adjusting the voltage amplitude.
5. The method as claimed in claim 4, wherein the step of S2 for compensating the output voltage of the energy storage unit in the assisted breathing machine by using a quadratic translation method comprises:
the process of compensating the output voltage of the energy storage unit in the assisted breathing machine by using the secondary translation method comprises the following steps:
a voltage regulating transformer and a series transformer which are connected with an energy storage unit are arranged in an automatic voltage regulating unit topological structure of the auxiliary respirator;
calculating secondary translation value delta U of energy storage unit voltage in auxiliary breathing machinei：
Figure FDA0003335242950000021
Wherein:
k1the transformation ratio of the voltage regulating transformer is represented, and the size of the transformation ratio can be adjusted by changing the connection of the thyristor on-load tap changer and the secondary side tap of the voltage regulating transformer;
k2representing the transformation ratio of the series transformer, and setting the transformation ratio to be a fixed value 2;
U′iis an energy storage unit RiAdaptively adjusting the adjusted voltage amplitude;
the compensated output voltage value of the energy storage unit is:
Figure FDA0003335242950000022
wherein:
Figure FDA0003335242950000023
representing compensated energy storage unit RiThe output voltage value of (1);
s represents a compensation control unit, s is {0,1}, and represents boost compensation when s is 0 and represents buck compensation when s is 1;
and setting a reference voltage value of the energy storage unit so that the compensated output voltage value reaches a preset reference voltage value.
6. The method of claim 5, wherein the step of optimizing the battery state of charge of the grid energy storage unit in step S3 comprises:
setting a control mode of an alternating current power grid in an automatic voltage regulating unit topological structure, and taking the alternating current power grid as a power grid energy storage unit; optimizing the battery state of charge in the power grid energy storage unit by using a battery state of charge optimization algorithm, wherein the battery state of charge optimization process comprises the following steps:
1) adjusting the voltage value of the power grid energy storage unit by using a secondary adjustment method, and calculating a charging voltage threshold u when the power grid energy storage unit is switched from a charging state to a discharging state1And calculating the discharge rate of the energy storage unit of the power grid under different voltage values and the discharge voltage threshold u2；
2) Adjusting the voltage value of the power grid energy storage unit by utilizing a secondary adjustment method in real time to enable the voltage value of the power grid energy storage unit to be in an interval (u)1,u2]；
3) If the voltage value of the power grid energy storage unit exceeds the discharge voltage threshold u2And then closing the secondary regulation of the power grid energy storage unit.
7. The method as claimed in claim 6, wherein the step S4 of setting a voltage detection point in the assisted breathing apparatus, detecting a voltage amplitude of the voltage detection point of the assisted breathing apparatus, and determining whether the voltage amplitude of the current voltage detection point needs to be adjusted by the assisted breathing apparatus comprises:
setting a voltage detection point at the auxiliary respirator, setting a voltage detection upper and lower line preset value, detecting the voltage amplitude of the output voltage of the auxiliary respirator at the voltage detection point, comparing the voltage amplitude with the voltage detection upper and lower line preset value, if the voltage amplitude of the detection point is in the voltage detection upper and lower line preset value interval, indicating that the auxiliary respirator is normal in voltage, and not needing to perform auxiliary respirator voltage regulation operation, otherwise, under the condition of controlling the auxiliary respirator discharge rate in a reasonable interval, distributing the auxiliary respirator power to a plurality of energy storage units, wherein the energy storage units execute the voltage regulation operation, and the voltage regulation operation comprises a self-adaptive voltage regulation method and a voltage compensation method based on a secondary translation method.
8. The method according to claim 7, wherein the step S4 sets a pressure regulating sequence of the assisted breathing apparatus, and performs the automatic pressure regulation of the assisted breathing apparatus, including:
establishing an objective function of the pressure regulating time sequence of the auxiliary breathing machine, wherein the objective function of the pressure regulating time sequence of the auxiliary breathing machine is as follows:
Figure FDA0003335242950000031
wherein:
f represents the price of electric energy;
Widenotes an energy storage unit RiActual allocated power of;
delta d represents the pressure regulating interval of the auxiliary respirator;
t represents the pressure regulation period of the auxiliary ventilator;
and generating a plurality of groups of auxiliary breathing machine data, inputting the generated data into an objective function, calculating to obtain a minimum voltage regulation period T, and executing voltage regulation operation in the next voltage regulation period if the auxiliary breathing machine voltage regulation is required to be executed.
CN202111292260.7A 2021-11-03 2021-11-03 Automatic pressure regulating method for auxiliary breathing machine Withdrawn CN114042214A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115970117A (en) * 2022-12-01 2023-04-18 深圳市普博医疗科技股份有限公司 Power control method and power control device for ventilator, and ventilator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115970117A (en) * 2022-12-01 2023-04-18 深圳市普博医疗科技股份有限公司 Power control method and power control device for ventilator, and ventilator

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