Pulse type air wave control device and control method thereof

Abstract

The present application discloses a pulsed air wave control device and a control method thereof, which relates to the technical field of medical devices, and includes: a main air tank is connected to an air pump through a first solenoid valve, a supplementary air tank is connected to an air pump through a second solenoid valve, a main air tank is connected to an air bag through a proportional valve, a supplementary air tank is connected to an air bag through a third solenoid valve, a first pressure sensor is connected to the main air tank, a second pressure sensor is connected to the supplementary air tank, and a third pressure sensor is connected to the air bag, and a controller is respectively connected to the air pump, the first solenoid valve, the second solenoid valve, the proportional valve, the third solenoid valve, the first pressure sensor, the second pressure sensor, and the third pressure sensor. By controlling the opening of the proportional valve, uniform inflation and inflation speed can be achieved, and the supplementary air tank is used to inflate the air bag, because the volume of the supplementary air tank is smaller than that of the main air tank, it is easier than directly controlling the main air tank with a large volume, thereby improving the accuracy of pressure control in the air bag.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a pulsed air wave control device and a control method thereof. Background Art

[0002] The pulsed air wave uses pulsed gas to quickly impact the sole of the foot in a very short time, so that the venous blood in the limbs can obtain a pulsed acceleration similar to that in walking, thereby greatly increasing the blood flow rate. It increases and eliminates one of the three major causes of thrombosis - blood congestion, and prevents deep vein thrombosis (DVT) and pulmonary embolism (PE) caused by the detachment of venous thrombus or sequelae derived from deep vein thrombosis.

[0003] Pulse therapy means that the inflation time requirement is relatively short, and the airbag is inflated to reach the target pressure in a short time. The current technology is to control the opening time of the solenoid valve. However, due to the large volume of the gas storage tank, which contains high-pressure gas, the error between the actual pressure in the airbag and the target pressure is relatively large if the inflation is simply based on controlling the opening time of the solenoid valve. In addition, the inflation speed cannot be adjusted at present, which cannot meet the needs of different users and has poor comfort.

[0004] Therefore, how to improve the accuracy of pressure control in the airbag and achieve adjustable inflation speed to meet the needs of different users and improve comfort is a problem that technical personnel in this field need to solve. Summary of the invention

[0005] The purpose of this application is to provide a pulsed air wave control device and a control method thereof, which are used to solve the problem that the current inflation only relies on controlling the opening time of the solenoid valve, resulting in a large error between the actual pressure in the airbag and the target pressure; in addition, the inflation speed cannot be adjusted, the needs of different users cannot be met, and the comfort level is poor.

[0006] In order to solve the above technical problems, the present application provides a pulsed air wave control device, including: a controller, an air pump, a first solenoid valve, a second solenoid valve, a main air storage tank, an air supplement tank, a proportional valve, a third solenoid valve, a first pressure sensor, a second pressure sensor and a third pressure sensor;

[0007] The main air tank is connected to the air pump through the first solenoid valve, the supplementary air tank is connected to the air pump through the second solenoid valve, the main air tank is connected to the airbag through the proportional valve, the supplementary air tank is connected to the airbag through the third solenoid valve, the first pressure sensor is connected to the main air tank, the second pressure sensor is connected to the supplementary air tank, the third pressure sensor is connected to the airbag, and the controller is respectively connected to the air pump, the first solenoid valve, the second solenoid valve, the proportional valve, the third solenoid valve, the first pressure sensor, the second pressure sensor and the third pressure sensor; wherein the volume of the supplementary air tank is smaller than the volume of the main air tank.

[0008] Optionally, it also includes a fourth solenoid valve connected to the controller, and the fourth solenoid valve is arranged on the pipeline between the third solenoid valve and the airbag.

[0009] Optionally, it also includes a relief valve connected to the controller, and the relief valve is respectively connected to the proportional valve, the fourth solenoid valve and the airbag.

[0010] The present application also provides a control method for a pulsed air wave control device, which is applied to the pulsed air wave control device, and includes:

[0011] Obtaining a target inflation speed and a target inflation pressure of the airbag;

[0012] calling the target opening of the proportional valve corresponding to the target inflation speed, controlling the proportional valve to open to the target opening, so as to inflate the airbag using the main air tank, and controlling the proportional valve to close when the pressure in the airbag reaches a preset ratio of the target inflation pressure;

[0013] Obtain the correspondence between the pressure of the air replenishment tank, the airbag pressure and the air replenishment time, determine the target air replenishment time according to the current pressure of the air replenishment tank, the target inflation pressure and the correspondence, control the third solenoid valve to open and then close after the target inflation time, so as to use the air replenishment tank to replenish the airbag to the target inflation pressure.

[0014] Optionally, before obtaining the target inflation speed and the target inflation pressure of the airbag, the method further includes:

[0015] Controlling the air pump, the first solenoid valve and the second solenoid valve to open, so as to inflate the main air storage tank and the supplementary air storage tank respectively;

[0016] When the first pressure sensor detects that the pressure of the main air tank reaches the first set pressure, the first solenoid valve is controlled to be closed. When the second pressure sensor detects that the pressure of the supplementary air tank reaches the second set pressure, the second solenoid valve is controlled to be closed. After the main air tank and the supplementary air tank are both fully inflated, the air pump is controlled to be closed.

[0017] Optionally, before obtaining the corresponding relationship between the pressure of the air replenishment tank, the airbag pressure and the air replenishment time, the method further includes:

[0018] After the air replenishment tank is inflated to a preset pressure, the air is replenished into the airbag, and the air replenishment time required for the airbag to reach each pressure gradient is recorded to obtain a time array corresponding to each preset pressure;

[0019] The time array includes the corresponding relationship between the airbag pressure and the air replenishment time.

[0020] Optionally, if the preset pressure includes a first preset pressure, a second preset pressure, and a third preset pressure that decrease in sequence, determining the target air replenishment time according to the current pressure of the air replenishment tank, the target inflation pressure, and the corresponding relationship includes:

[0021] Obtaining the historical inflation pressure of the airbag set last time and the historical inflation time corresponding to the historical inflation pressure;

[0022] Determine an offset value according to the target inflation pressure and the historical inflation pressure, and determine a first target array sequence number of the historical inflation time in the time array;

[0023] Determine a second target array sequence number according to the first target array sequence number and the offset value;

[0024] When the current pressure of the air replenishment tank is greater than or equal to the first preset pressure, the target inflation time corresponding to the second target array number is determined in the first time array corresponding to the first preset pressure;

[0025] When the current pressure of the air replenishment tank is less than the first preset pressure and greater than or equal to the second preset pressure, determining the target inflation time according to a first preset formula;

[0026] The first preset formula is: InflationTime=M[Temp]-(GasCrusePressure-second preset pressure)*(M[Temp]-L[Temp]) / A;

[0027] When the current pressure of the air replenishment tank is less than the second preset pressure and greater than or equal to the third preset pressure, determining the target inflation time according to a second preset formula;

[0028] The second preset formula: InflationTime=M[Temp]+(second preset pressure-GasCrusePressure)*(H[Temp]-M[Temp]) / A;

[0029] Wherein, InflationTime is the target inflation time, GasCrusePressure is the current pressure of the gas replenishment tank, M[Temp] is the gas replenishment time corresponding to the second target array number in the second time array corresponding to the second preset pressure, L[Temp] is the gas replenishment time corresponding to the second target array number in the first time array corresponding to the first preset pressure, H[Temp] is the gas replenishment time corresponding to the second target array number in the third time array corresponding to the third preset pressure, and A is the difference between the first preset pressure and the second preset pressure;

[0030] When the current pressure of the air replenishment tank is less than the third preset pressure, an alarm is generated.

[0031] Optionally, also include:

[0032] If the pressure in the airbag is greater than the sum of the target inflation pressure and the first preset value, the deflation valve is controlled to deflate until the pressure in the airbag is within the range of the target inflation pressure ± the first preset value, and the deflation valve is controlled to close;

[0033] If the pressure in the airbag is less than the difference between the target inflation pressure and the first preset value, the airbag is inflated until the pressure in the airbag is within the range of the target inflation pressure±the first preset value, and the inflating is stopped.

[0034] Optionally, the step of replenishing air to the airbag includes:

[0035] The fourth solenoid valve is controlled to open, the third solenoid valve is closed, and the airbag is inflated with gas in the pipeline between the third solenoid valve and the fourth solenoid valve.

[0036] Optionally, determining the second target array sequence number according to the first target array sequence number and the offset value includes:

[0037] If the historical inflation pressure is greater than the sum of the target inflation pressure and a second preset value, the second target array sequence number is the difference between the first target array sequence number and the offset value;

[0038] If the historical inflation pressure is less than the difference between the target inflation pressure and the second preset value, the second target array sequence number is the sum of the first target array sequence number and the offset value;

[0039] If the historical inflation pressure is within the target inflation pressure±the second preset range, the second target array sequence number is the first target array sequence number.

[0040] A pulse air wave control device provided in the present application includes: a controller, an air pump, a first solenoid valve, a second solenoid valve, a main air tank, an air supplement tank, a proportional valve, a third solenoid valve, a first pressure sensor, a second pressure sensor and a third pressure sensor; the main air tank is connected to the air pump through the first solenoid valve, the air supplement tank is connected to the air pump through the second solenoid valve, the main air tank is connected to the airbag through the proportional valve, the air supplement tank is connected to the airbag through the third solenoid valve, the first pressure sensor is connected to the main air tank, the second pressure sensor is connected to the air supplement tank, and the third pressure sensor is connected to the airbag, and the controller is respectively connected to the air pump, the first solenoid valve, the second solenoid valve, the proportional valve, the third solenoid valve, the first pressure sensor, the second pressure sensor and the third pressure sensor; wherein the volume of the air supplement tank is smaller than the volume of the main air tank. By controlling the opening of the proportional valve, uniform inflation and controlled inflation speed can be achieved; and the airbag is inflated with air using an air replenishment tank, because the volume of the air replenishment tank is smaller than that of the main air tank, it is easier than directly controlling the large-volume main air tank, thereby improving the accuracy of pressure control in the airbag.

[0041] The beneficial effects of the control method of a pulsed air wave control device provided in the present application correspond to the device, and the effects are as above. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0043] Figure 1 A structural diagram of a pulsed air wave control device provided in an embodiment of the present application;

[0044] Figure 2 A flow chart of a control method of a pulsed air wave control device provided in an embodiment of the present application;

[0045] The accompanying drawings are marked as follows: 1 is an air pump, 2 is a first solenoid valve, 3 is a second solenoid valve, 4 is a main air tank, 5 is a supplementary air tank, 6 is a proportional valve, 7 is a third solenoid valve, 8 is a first pressure sensor, 9 is a second pressure sensor, 10 is a third pressure sensor, 11 is an air bag, 12 is a fourth solenoid valve, and 13 is an air release valve. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0047] The core of this application is to provide a pulsed air wave control device and a control method thereof, which are used to improve the accuracy of pressure control in the airbag and achieve adjustable inflation speed to meet the needs of different users and improve comfort.

[0048] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0049] Figure 1 A structural diagram of a pulsed air wave control device provided in an embodiment of the present application, such as Figure 1 As shown, a pulse air wave control device includes: a controller, an air pump 1, a first solenoid valve 2, a second solenoid valve 3, a main air tank 4, an air supplement tank 5, a proportional valve 6, a third solenoid valve 7, a first pressure sensor 8, a second pressure sensor 9 and a third pressure sensor 10; the main air tank 4 is connected to the air pump 1 through the first solenoid valve 2, the air supplement tank 5 is connected to the air pump 1 through the second solenoid valve 3, the main air tank 4 is connected to the air bag 11 through the proportional valve 6, the air supplement tank 5 is connected to the air bag 11 through the third solenoid valve 7, the first pressure sensor 8 is connected to the main air tank 4, the second pressure sensor 9 is connected to the air supplement tank 5, and the third pressure sensor 10 is connected to the air bag 11, and the controller is respectively connected to the air pump 1, the first solenoid valve 2, the second solenoid valve 3, the proportional valve 6, the third solenoid valve 7, the first pressure sensor 8, the second pressure sensor 9 and the third pressure sensor 10; wherein, the volume of the air supplement tank 5 is smaller than the volume of the main air tank 4.

[0050] It also includes a fourth solenoid valve 12 connected to the controller, and the fourth solenoid valve 12 is arranged on the pipeline between the third solenoid valve 7 and the airbag 11. By setting the fourth solenoid valve 12, when the airbag 11 is replenished, the gas in the pipeline between the third solenoid valve 7 and the fourth solenoid valve 12 can be used to replenish the air in the airbag 11, which can improve the accuracy of the air pressure regulation in the airbag 11. It also includes a deflation valve 13 connected to the controller, and the deflation valve 13 is respectively connected to the proportional valve 6, the fourth solenoid valve 12 and the airbag 11. The deflation valve 13 is arranged to prevent the pressure in the airbag 11 from exceeding the target inflation pressure. Of course, it can also include a display screen, which is responsible for the human-computer interaction. The user can set the target inflation pressure, target inflation speed, running time, cycle interval time, pulse holding time and other parameters, and the display screen sends the data to the controller in real time through the serial port.

[0051] The controller mainly generates pulse width modulation (PWM) through the air pump control circuit by starting the timer, controls the power of the air pump to generate gas; controls the opening of the proportional valve 6 to control the flow of gas in the main gas tank 4; and controls the switch of the solenoid valve by the timer to control the gas flow of the supplementary gas tank 5. The specific control method will be further introduced in the embodiment of the method below.

[0052] A pulse air wave control device provided in the present application includes: a controller, an air pump, a first solenoid valve, a second solenoid valve, a main air tank, an air supplement tank, a proportional valve, a third solenoid valve, a first pressure sensor, a second pressure sensor and a third pressure sensor; the main air tank is connected to the air pump through the first solenoid valve, the air supplement tank is connected to the air pump through the second solenoid valve, the main air tank is connected to the airbag through the proportional valve, the air supplement tank is connected to the airbag through the third solenoid valve, the first pressure sensor is connected to the main air tank, the second pressure sensor is connected to the air supplement tank, and the third pressure sensor is connected to the airbag, and the controller is respectively connected to the air pump, the first solenoid valve, the second solenoid valve, the proportional valve, the third solenoid valve, the first pressure sensor, the second pressure sensor and the third pressure sensor; wherein the volume of the air supplement tank is smaller than the volume of the main air tank. By controlling the opening of the proportional valve, uniform inflation and controlled inflation speed can be achieved; and the airbag is inflated with air using an air replenishment tank, because the volume of the air replenishment tank is smaller than that of the main air tank, it is easier than directly controlling the large-volume main air tank, thereby improving the accuracy of pressure control in the airbag.

[0053] In order to achieve accurate control of the pressure in the airbag, a high-precision proportional valve can be directly selected to adjust the opening of the proportional valve, but the control is difficult and the high-precision proportional valve is expensive. This application first uses the main air tank for inflation, and then uses the supplementary air tank with a smaller volume than the main air tank for replenishment, which is less difficult to control and has low cost.

[0054] Figure 2 A flow chart of a control method of a pulsed air wave control device provided in an embodiment of the present application, such as Figure 2 As shown, the control method of the pulsed air wave control device includes:

[0055] S10: Obtaining a target inflation speed and a target inflation pressure of the airbag.

[0056] S11: calling the target opening of the proportional valve corresponding to the target inflation speed, controlling the proportional valve to open to the target opening, so as to use the main air tank to inflate the airbag, and when the pressure in the airbag reaches a preset proportion of the target inflation pressure, controlling the proportional valve to close.

[0057] S12: Obtain the correspondence between the pressure of the air replenishment tank, the airbag pressure and the air replenishment time, determine the target air replenishment time according to the current pressure of the air replenishment tank, the target inflation pressure and the correspondence, control the third solenoid valve to open and close after the target inflation time, so as to use the air replenishment tank to replenish the airbag to the target inflation pressure.

[0058] The entire control process includes an air storage stage, a pre-charging stage, an air replenishing stage, a pressure maintaining stage, and a cycle interval air release stage.

[0059] Before executing step S10, it is the gas storage stage. When the device is just turned on, the controller controls the air pump 1, the first solenoid valve 2 and the second solenoid valve 3 to open, so as to inflate the main gas tank 4 and the supplementary gas tank 5 respectively; when the first pressure sensor 8 detects that the pressure of the main gas tank 4 reaches the first set pressure, the first solenoid valve 2 is controlled to be closed, and when the second pressure sensor 9 detects that the pressure of the supplementary gas tank 5 reaches the second set pressure, the second solenoid valve 3 is controlled to be closed. After the main gas tank 4 and the supplementary gas tank 5 are both filled, the air pump 1 is controlled to be closed, waiting for the user to start.

[0060] In step S11, it is the pre-inflation stage, which mainly realizes the functions of uniform inflation and inflation speed control. Before calling the target opening of the proportional valve 6 corresponding to the target inflation speed, the corresponding relationship between the inflation speed and the proportional valve opening can be preset. The opening of the proportional valve 6 is controllable from 0 to 100%, and the inflation speed can be set to five levels. Since the inflation time is usually controlled to be relatively short, the opening of the proportional valve 6 is controlled to start from 50%. If the set inflation speed is level 2, the opening of the proportional valve 6 is controlled to be 60%. In the process of the main air tank 4 inflating the airbag 11, the third pressure sensor 10 detects the pressure in the airbag 11 in real time and feeds back to the controller. When the pressure reaches 80% of the target inflation pressure, the proportional valve 6 is controlled to close.

[0061] In the pre-inflating stage, the first solenoid valve 2 is closed, the second solenoid valve 3 and the air pump 1 are opened, and the air replenishing gas storage tank 5 is inflated to prepare for the air replenishing stage.

[0062] In step 12, it is the gas replenishment stage. In order to achieve the effect of pulse-type rapid inflation, the gas replenishment also needs to be completed in a very short time. The target gas replenishment time is directly determined according to the current pressure of the gas replenishment tank 5 and the target inflation pressure. The specific method is as follows.

[0063] (i) Before obtaining the corresponding relationship between the air replenishment tank pressure, the airbag pressure and the air replenishment time, the method further includes: after the air replenishment tank 5 is inflated to a preset pressure, air is replenished into the airbag 11, and the air replenishment time required for the airbag 11 to reach each pressure gradient is recorded to obtain a time array corresponding to each preset pressure; wherein the time array includes the corresponding relationship between the airbag pressure and the air replenishment time.

[0064] The following example illustrates that three time arrays are designed in the embodiment of the present application, and the values ​​of the arrays are from small to large, which are obtained by verification of a large amount of data.

[0065] First, inflate the air replenishment tank 5 to 140KPa, and then verify the inflation time with each 20mmhg target pressure as a step and the maximum target as 200mmhg, and obtain the first time array: L[Temp]={3 / *1-20* / ,7 / *21-40* / ,9 / *41-60* / ,11 / *61-80* / ,14 / *81-100* / ,16 / *101-120* / ,17 / *121-140* / ,19 / *141-160* / ,20 / *161-180* / ,21 / *181-200}. In the first time array, when the airbag pressure is 1-20 mmhg, the inflation time is 3 ms, and the array number is 0; when the airbag pressure is 21-40 mmhg, the inflation time is 7 ms, and the array number is 1; and so on.

[0066] Then, the air replenishment tank 5 is inflated to 105 KPa, and then the inflation time is verified respectively with each 20 mmhg target pressure as a step and the maximum target being 200 mmhg, to obtain a second time array.

[0067] Finally, the air replenishment tank 5 is inflated to 70 KPa, and then the inflation time is verified respectively with each 20 mmhg target pressure as a step and the maximum target being 200 mmhg, to obtain the third time array.

[0068] (ii) Determine the target air replenishment time according to the current pressure of the air replenishment tank 5, the target inflation pressure and the above correspondence (the time array corresponding to the preset pressure; wherein the time array includes the correspondence between the airbag pressure and the air replenishment time).

[0069] If the preset pressure includes a first preset pressure, a second preset pressure, and a third preset pressure that decrease in sequence, the target air replenishment time is determined according to the current pressure of the air replenishment tank 5, the target inflation pressure, and the corresponding relationship, specifically including:

[0070] (1) Obtain the historical inflation pressure of the airbag 11 set last time and the historical inflation time corresponding to the historical inflation pressure; determine the offset value according to the target inflation pressure and the historical inflation pressure, and determine the first target array sequence number of the historical inflation time in the time array; determine the second target array sequence number according to the first target array sequence number and the offset value.

[0071] The system saves the historical inflation pressure of the airbag 11 set last time as LastPressure, and the current target inflation pressure is recorded as Pressure.

[0072] Among them, the offset value is determined according to the target inflation pressure and the historical inflation pressure: if LastPressure is greater than Pressure+20, the offset value is (LastPressure-Pressure) / 20; if LastPressure is less than Pressure-20, the offset value is (Pressure-LastPressure) / 20; if Pressure-20≤LastPressure≤Pressure+20, the offset value is zero.

[0073] (2) determining the second target array number according to the first target array number and the offset value, including: if the historical inflation pressure is greater than the sum of the target inflation pressure and the second preset value, the second target array number is the difference between the first target array number and the offset value; if the historical inflation pressure is less than the difference between the target inflation pressure and the second preset value, the second target array number is the sum of the first target array number and the offset value; if the historical inflation pressure is within the range of the target inflation pressure ± the second preset value, the second target array number is the first target array number.

[0074] Specifically, if LastPressure is greater than Pressure+20, the second target array number is equal to the first target array number minus the offset value; if LastPressure is less than Pressure-20, the second target array number is equal to the first target array number plus the offset value; if Pressure-20≤LastPressure≤Pressure+20, the second target array number is the first target array number. Note: Since the pressure error range specified by the air wave is ±20% or plus or minus 20mmhg, 20 is used as the calculation basis.

[0075] (3) When the current pressure of the air replenishment storage tank 5 is greater than or equal to the first preset pressure, the target inflation time corresponding to the second target array number is determined in the first time array corresponding to the first preset pressure.

[0076] Specifically, if the pressure of the air replenishment tank 5 is greater than or equal to 140 kPa, the corresponding value is directly searched in the first time array according to the second target array sequence number, which is the target inflation time for this time. For ease of understanding, the following example is given, and reference is made to the first time array listed above: L[Temp] = {3 / *1-20* / , 7 / *21-40* / , 9 / *41-60* / , 11 / *61-80* / , 14 / *81-100* / , 16 / *101-120* / , 17 / *121-140* / , 19 / *141-160* / , 20 / *161-180* / , 21 / *181-200}. If the historical inflation pressure is 20 mmHg, the historical inflation time is 3 ms, and the target inflation pressure this time is 60 mmHg, the calculated offset value is 2, the first target array number corresponding to the historical inflation time of 3 ms is 0, and the second target array number is 0 plus 2, which is 2. Since the pressure of the air replenishment tank 5 is greater than or equal to 140 kPa, in the first time array, the target inflation time corresponding to the second target array number 2 is 9 ms.

[0077] (4) When the current pressure of the gas replenishment tank 5 is less than the first preset pressure and greater than or equal to the second preset pressure, the target inflation time is determined according to the first preset formula; the first preset formula is: InflationTime = M[Temp]-(GasCrusePressure-second preset pressure)*(M[Temp]-L[Temp]) / A.

[0078] (5) When the current pressure of the gas replenishment tank 5 is less than the second preset pressure and greater than or equal to the third preset pressure, the target inflation time is determined according to the second preset formula; the second preset formula: InflationTime = M[Temp] + (second preset pressure - GasCrusePressure) * (H[Temp] - M[Temp]) / A;

[0079] Among them, InflationTime is the target inflation time, GasCrusePressure is the current pressure of the gas replenishment tank 5, M[Temp] is the gas replenishment time corresponding to the second target array number in the second time array corresponding to the second preset pressure, L[Temp] is the gas replenishment time corresponding to the second target array number in the first time array corresponding to the first preset pressure, H[Temp] is the gas replenishment time corresponding to the second target array number in the third time array corresponding to the third preset pressure, and A is the difference between the first preset pressure and the second preset pressure; if the first preset pressure is 140kpa, the second preset pressure is 105kpa, and the third preset pressure is 70kpa, A is equal to 35.

[0080] (6) When the current pressure of the air replenishment tank 5 is less than the third preset pressure, the air replenishment time of the air replenishment tank is too long to meet the pulse inflation requirement, and it is determined to be an abnormal state and an abnormal alarm is issued.

[0081] After determining the target air replenishment time, the controller opens the third solenoid valve 7 and the fourth solenoid valve 12 according to the target air replenishment time to replenish air to the airbag 11. When the air replenishment time is up, the third solenoid valve 7 and the fourth solenoid valve 12 are closed, and the system enters the pressure maintaining stage.

[0082] After step S12, the pressure-maintaining stage is entered, and the third pressure sensor 10 monitors the pressure in the airbag 11 in real time. If the pressure in the airbag 11 is greater than the sum of the target inflation pressure and the first preset value, the deflation valve 13 is controlled to deflate until the pressure in the airbag 11 is within the range of the target inflation pressure ± the first preset value, and the deflation valve 13 is controlled to close; if the pressure in the airbag 11 is less than the difference between the target inflation pressure and the first preset value, the airbag 11 is inflated until the pressure in the airbag 11 is within the range of the target inflation pressure ± the first preset value, and the inflating is stopped. Among them, inflating the airbag 11 in the pressure-maintaining stage includes: controlling the fourth solenoid valve 12 to open, closing the third solenoid valve 7, and using the gas in the pipeline between the third solenoid valve 7 and the fourth solenoid valve 12 to inflate the airbag 11. Furthermore, until the pressure in the airbag 11 is within the range of the target inflation time ± the first preset value, the fourth solenoid valve 12 is controlled to close, and the third solenoid valve 7 is controlled to open for a preset time to replenish air in the pipeline between the third solenoid valve 7 and the fourth solenoid valve 12.

[0083] Specifically, if the pressure in the airbag 11 is greater than the target inflation pressure +10mmhg, open the deflation valve 13 to deflate. If the pressure in the airbag 11 is less than the target inflation pressure +10mmhg, close the deflation valve 13. If the pressure in the airbag 11 is less than the target inflation pressure -10mmhg, open the fourth solenoid valve 12, close the third solenoid valve 7, and use the air pressure in the trachea between the third solenoid valve 7 and the fourth solenoid valve 12 to replenish air. When the pressure in the airbag 11 is greater than the target inflation pressure -10mmhg, close the fourth solenoid valve 12, open the third solenoid valve 7, and open it for 0.1s to replenish air in the trachea between the third solenoid valve 7 and the fourth solenoid valve 12, in preparation for the next air replenishment of the airbag 11, until the pressure holding time is up, and enter the cycle interval deflation stage. During the entire air replenishment stage and the pressure holding stage, the controller needs to open the air pump 1 and the first solenoid valve 2 to inflate the main air tank 4 to prepare for the pre-inflation of the next cycle.

[0084] Cycle interval deflation stage: close the third solenoid valve 7 and the fourth solenoid valve 12, open the deflation valve 13, deflate the airbag 11, and open the air pump 1 and the second solenoid valve 3 at the same time to inflate the air storage tank 5 to prepare for the next cycle of air replenishment stage. After the cycle interval time is up, close the deflation valve 13, perform the pre-inflation stage, and start the next cycle.

[0085] A control method for a pulse air wave control device provided in the present application is applied to the above-mentioned pulse air wave control device, including: obtaining a target inflation speed and a target inflation pressure of the airbag; calling the target opening of the proportional valve corresponding to the target inflation speed, controlling the proportional valve to open to the target opening, so as to use the main air tank to inflate the airbag, and when the pressure in the airbag reaches a preset proportion of the target inflation pressure, controlling the proportional valve to close; obtaining the correspondence between the pressure of the air replenishment tank, the airbag pressure and the air replenishment time, determining the target air replenishment time according to the current pressure of the air replenishment tank, the target inflation pressure and the corresponding relationship, controlling the third solenoid valve to open and close after the target air replenishment time, so as to use the air replenishment tank to replenish the airbag to the target inflation pressure. By controlling the opening of the proportional valve, uniform inflation and controlled inflation speed can be achieved; the airbag is first inflated using the main air tank, and then the airbag is inflated using a supplementary air tank with a smaller volume than the main air tank. This is easier than directly controlling the large-volume main air tank, thereby improving the accuracy of pressure control in the airbag.

[0086] The above is a detailed introduction to a pulsed air wave control device and a control method thereof provided by the present application. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

[0087] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

Claims

1. A pulsed air wave control device, characterized in that: include: A controller, an air pump, a first solenoid valve, a second solenoid valve, a main air storage tank, a supplementary air storage tank, a proportional valve, a third solenoid valve, a first pressure sensor, a second pressure sensor and a third pressure sensor; The main air tank is connected to the air pump through the first solenoid valve, the supplementary air tank is connected to the air pump through the second solenoid valve, the main air tank is connected to the airbag through the proportional valve, the supplementary air tank is connected to the airbag through the third solenoid valve, the first pressure sensor is connected to the main air tank, the second pressure sensor is connected to the supplementary air tank, the third pressure sensor is connected to the airbag, and the controller is respectively connected to the air pump, the first solenoid valve, the second solenoid valve, the proportional valve, the third solenoid valve, the first pressure sensor, the second pressure sensor and the third pressure sensor; wherein the volume of the supplementary air tank is smaller than that of the main air tank; The controller is used to: Obtaining a target inflation speed and a target inflation pressure of the airbag; calling the target opening of the proportional valve corresponding to the target inflation speed, controlling the proportional valve to open to the target opening, so as to inflate the airbag using the main air tank, and controlling the proportional valve to close when the pressure in the airbag reaches a preset ratio of the target inflation pressure; Obtaining a correspondence between the pressure of the air replenishment tank, the airbag pressure and the air replenishment time, determining the target air replenishment time according to the current pressure of the air replenishment tank, the target inflation pressure and the correspondence, and controlling the third solenoid valve to open and then close after the target inflation time, so as to use the air replenishment tank to replenish the airbag to the target inflation pressure; Before obtaining the target inflation speed and the target inflation pressure of the airbag, the method further includes: Controlling the air pump, the first solenoid valve and the second solenoid valve to open, so as to inflate the main air storage tank and the supplementary air storage tank respectively; When the first pressure sensor detects that the pressure of the main gas tank reaches a first set pressure, the first solenoid valve is controlled to be closed; when the second pressure sensor detects that the pressure of the supplementary gas tank reaches a second set pressure, the second solenoid valve is controlled to be closed; after the main gas tank and the supplementary gas tank are both fully inflated, the air pump is controlled to be closed; Before obtaining the corresponding relationship between the pressure of the air replenishment tank, the air bag pressure and the air replenishment time, the method further includes: After the air replenishment tank is inflated to a preset pressure, the air is replenished into the airbag, and the air replenishment time required for the airbag to reach each pressure gradient is recorded to obtain a time array corresponding to each preset pressure; The time array includes the corresponding relationship between the airbag pressure and the air replenishment time.

2. The pulsed air wave control device according to claim 1, characterized in that: It also includes a fourth solenoid valve connected to the controller, and the fourth solenoid valve is arranged on the pipeline between the third solenoid valve and the airbag.

3. The pulsed air wave control device according to claim 2, characterized in that: It also includes an air release valve connected to the controller, and the air release valve is respectively connected to the proportional valve, the fourth solenoid valve and the airbag.

4. A control method for a pulsed air wave control device, characterized in that: The pulsed air wave control device according to any one of claims 1 to 3 comprises: Obtaining a target inflation speed and a target inflation pressure of the airbag; calling the target opening of the proportional valve corresponding to the target inflation speed, controlling the proportional valve to open to the target opening, so as to inflate the airbag using the main air tank, and controlling the proportional valve to close when the pressure in the airbag reaches a preset ratio of the target inflation pressure; Obtaining a correspondence between the pressure of the air replenishment tank, the airbag pressure and the air replenishment time, determining the target air replenishment time according to the current pressure of the air replenishment tank, the target inflation pressure and the correspondence, and controlling the third solenoid valve to open and then close after the target inflation time, so as to use the air replenishment tank to replenish the airbag to the target inflation pressure; Before obtaining the target inflation speed and the target inflation pressure of the airbag, the method further includes: Controlling the air pump, the first solenoid valve and the second solenoid valve to open, so as to inflate the main air storage tank and the supplementary air storage tank respectively; When the first pressure sensor detects that the pressure of the main gas tank reaches a first set pressure, the first solenoid valve is controlled to be closed; when the second pressure sensor detects that the pressure of the supplementary gas tank reaches a second set pressure, the second solenoid valve is controlled to be closed; after the main gas tank and the supplementary gas tank are both fully inflated, the air pump is controlled to be closed; Before obtaining the corresponding relationship between the pressure of the air replenishment tank, the air bag pressure and the air replenishment time, the method further includes: After the air replenishment tank is inflated to a preset pressure, the air is replenished into the airbag, and the air replenishment time required for the airbag to reach each pressure gradient is recorded to obtain a time array corresponding to each preset pressure; The time array includes the corresponding relationship between the airbag pressure and the air replenishment time.

5. The control method of the pulsed air wave control device according to claim 4, characterized in that: If the preset pressure includes a first preset pressure, a second preset pressure, and a third preset pressure that decrease in sequence, determining the target air replenishment time according to the current pressure of the air replenishment tank, the target inflation pressure, and the corresponding relationship includes: Obtaining the historical inflation pressure of the airbag set last time and the historical inflation time corresponding to the historical inflation pressure; Determine an offset value according to the target inflation pressure and the historical inflation pressure, and determine a first target array sequence number of the historical inflation time in the time array; Determine a second target array sequence number according to the first target array sequence number and the offset value; When the current pressure of the air replenishment tank is greater than or equal to the first preset pressure, the target inflation time corresponding to the second target array number is determined in the first time array corresponding to the first preset pressure; When the current pressure of the air replenishment tank is less than the first preset pressure and greater than or equal to the second preset pressure, determining the target inflation time according to a first preset formula; The first preset formula is: InflationTime=M[Temp]-(GasCrusePressure-second preset pressure)*(M[Temp]-L[Temp]) / A; When the current pressure of the air replenishment tank is less than the second preset pressure and greater than or equal to the third preset pressure, determining the target inflation time according to a second preset formula; The second preset formula: InflationTime=M[Temp]+(second preset pressure-GasCrusePressure)*(H[Temp]-M[Temp]) / A; Wherein, InflationTime is the target inflation time, GasCrusePressure is the current pressure of the gas replenishment tank, M[Temp] is the gas replenishment time corresponding to the second target array number in the second time array corresponding to the second preset pressure, L[Temp] is the gas replenishment time corresponding to the second target array number in the first time array corresponding to the first preset pressure, H[Temp] is the gas replenishment time corresponding to the second target array number in the third time array corresponding to the third preset pressure, and A is the difference between the first preset pressure and the second preset pressure; When the current pressure of the air replenishment tank is less than the third preset pressure, an alarm is generated.

6. The control method of the pulsed air wave control device according to claim 4, characterized in that: Also includes: If the pressure in the airbag is greater than the sum of the target inflation pressure and the first preset value, the deflation valve is controlled to deflate until the pressure in the airbag is within the range of the target inflation pressure ± the first preset value, and the deflation valve is controlled to close; If the pressure in the airbag is less than the difference between the target inflation pressure and the first preset value, the airbag is inflated until the pressure in the airbag is within the range of the target inflation pressure±the first preset value, and the inflating is stopped.

7. The control method of the pulsed air wave control device according to claim 6, characterized in that: The step of replenishing the air bag with air comprises: The fourth solenoid valve is controlled to open, the third solenoid valve is closed, and the airbag is inflated with gas in the pipeline between the third solenoid valve and the fourth solenoid valve.

8. The control method of the pulsed air wave control device according to claim 5, characterized in that: The determining the second target array sequence number according to the first target array sequence number and the offset value includes: If the historical inflation pressure is greater than the sum of the target inflation pressure and a second preset value, the second target array sequence number is the difference between the first target array sequence number and the offset value; If the historical inflation pressure is less than the difference between the target inflation pressure and the second preset value, the second target array sequence number is the sum of the first target array sequence number and the offset value; If the historical inflation pressure is within the target inflation pressure±the second preset range, the second target array sequence number is the first target array sequence number.

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