Pressure stability control method and system without gas storage tank

Abstract

The invention discloses a pressure stability control method and system without an air storage tank, the system comprises an upper computer, a lower computer, a pressure air bag, a pressure sensor, an air inflation pump, an air inflation valve and an air escape valve, a target pressure value is set through the upper computer, the lower computer combines real-time feedback data of the pressure sensor, the air inflation pump, the air inflation valve and the air escape valve are dynamically adjusted, and the pressure stability control is achieved. The precise control of the pressure is realized; a dynamic inflation control algorithm, a pump valve switch time sequence control algorithm and an air supply control algorithm are adopted, the inflation speed is dynamically adjusted through PWM signals, potential safety hazards and inconvenience caused by the design of a traditional air storage tank are eliminated, the inflation time is shortened, and the size and weight of equipment are reduced. The system has high-precision voltage stabilization performance, can quickly respond and adapt to physiological needs of different patients, and improves the accuracy of detection data and the biological feedback and electrical stimulation treatment effect.

Description

Technical Field

[0001] The invention relates to the technical field of pressure control for pelvic floor muscle stretching training, and in particular to a pressure stabilization control method and system without an air storage tank. Background Art

[0002] With the trend of population aging, the number of people suffering from pelvic floor dysfunction is increasing year by year. Diseases such as urinary incontinence have a greater impact on the quality of life than diabetes, arthritis, and even cancer. Injury to the female pelvic floor muscles is one of the main causes of pelvic floor dysfunction. The diagnosis of pelvic floor dysfunction can use a deformable probe inserted into the female vagina to collect pelvic floor electromyography data or pressure data to evaluate the pelvic floor neuromuscular function. At the same time, the first-line treatment for pelvic floor dysfunction is to guide patients to perform biofeedback training and electrical stimulation therapy by controlling the deformable probe inserted into the vagina through the host. At present, the deformable probe realizes biofeedback training through inflation and deflation, but due to the different physiological conditions of each person and the poor voltage stabilization effect of the existing probe, it is difficult to keep it in contact with the cavity wall during training, which greatly affects the biofeedback effect and electrical stimulation treatment effect. In addition, most of the existing pelvic floor muscle detection and treatment equipment achieves voltage stabilization through gas storage tanks, which has the problems of long inflation time, large equipment space occupation, inconvenience in carrying, and potential safety hazards. Summary of the invention

[0003] Technical purpose: In view of the shortcomings of the pressure stabilization effect of existing pelvic floor muscle detection and treatment equipment, the present invention discloses a pressure stabilization control method and system without a gas storage tank, which can improve the pressure stabilization performance of pelvic floor muscle detection and treatment equipment, and shorten the inflation time without the need for a gas storage tank, thereby improving portability and safety.

[0004] Technical solution: To achieve the above technical objectives, the present invention adopts the following technical solution:

[0005] A pressure stabilization control method without a gas storage tank comprises the following steps:

[0006] The upper computer sets the target pressure value as the basis for pressure regulation and sends inflation or deflation instructions to the lower computer;

[0007] The current pressure value in the pressure bag is collected in real time through the pressure sensor, and the deviation between the current pressure value and the target pressure value is monitored;

[0008] Determine a turning point based on the relationship between the output pressure value of the inflation pump and the inflation speed, wherein the turning point is the dividing point at which the output pressure of the inflation pump begins to decrease as the inflation speed increases after the inflation speed increases to a certain critical value;

[0009] After the lower computer receives the inflation command, it dynamically selects the inflation speed before and after the turning point according to the difference between the current pressure value and the target pressure value, and stops inflating after inflating to the target pressure value or receiving the stop command issued by the upper computer;

[0010] After the lower computer receives the deflation command, it starts the deflation process to release the pressure, and stops deflation when the current pressure value returns to the target range or after receiving the stop command issued by the upper computer;

[0011] During the inflation or deflation process, the pressure sensor collects the current pressure value in the pressure airbag in real time and dynamically adjusts the operating parameters. When abnormal pressure or equipment failure is detected, all operations are terminated immediately and the abnormal status is fed back.

[0012] A pressure stabilization control system without a gas storage tank, used to implement a pressure stabilization control method without a gas storage tank as described above, comprising:

[0013] The upper computer is used to set the target pressure value and send the command to start inflation or deflation to the lower computer, and at the same time verify whether the target pressure value is within the preset range. If the target pressure value is invalid, an abnormal information is generated and the operation is stopped;

[0014] The lower computer is used to receive the target pressure value and instructions set by the upper computer, and dynamically control the inflation pump, inflation valve and deflation valve in combination with the real-time pressure data fed back by the pressure sensor to achieve pressure regulation and perform inflation or deflation operations;

[0015] a pressure bladder that stores gas and responds to inflation and deflation operations;

[0016] The pressure sensor is used to collect the current pressure value inside the pressure airbag in real time and feed the pressure data back to the lower computer;

[0017] The air pump is used to inflate the pressure airbag by dynamically adjusting the inflation speed. The inflation speed is dynamically controlled by the lower computer according to the difference between the current pressure value and the target pressure value and the speed turning point characteristics;

[0018] The inflation valve is used to control the output airflow of the inflation pump to the pressure airbag to achieve precise pressure regulation;

[0019] The relief valve is used to release excess pressure from the pressure airbag. The opening and closing of the relief valve is controlled by the lower computer according to whether the current pressure value exceeds the target range.

[0020] Beneficial effects: The pressure stabilization control method and system without a gas storage tank provided by the present invention have the following beneficial effects:

[0021] 1. The present invention uses a dynamic inflation control algorithm to adjust the inflation pump speed (PWM duty cycle control) according to the difference between the current pressure value and the target pressure value, thereby achieving fast inflation at low pressure and slow inflation at high pressure, effectively avoiding pressure overshoot and fluctuation, and improving pressure stability. The pump valve switch timing control algorithm is adopted to reasonably coordinate the action sequence of the inflation pump, the inflation valve, and the deflation valve to make the pressure regulation more accurate and stable. According to the cavity shape and muscle state of different patients, the present invention can adjust the pressure of the pressure airbag in real time to make the probe fit the cavity wall more closely, thereby improving the accuracy of biofeedback training.

[0022] 2. The present invention adopts a real-time dynamic pressure regulation method, eliminates the traditional gas tank design, and directly uses the inflation pump to drive the pressure airbag to complete the pressure regulation, shortening the inflation time and improving the response speed of the equipment; the elimination of the gas tank reduces the overall size and weight of the equipment, making it more suitable for the design requirements of portable medical devices; the gas tank has safety hazards in a high-pressure environment. The present invention avoids possible pressure overload or gas leakage risks through real-time pressure monitoring and dynamic control.

[0023] 3. The present invention collects the internal pressure value of the pressure airbag in real time through the pressure sensor, and feeds back the data to the lower computer and the upper computer to realize dynamic adjustment and real-time monitoring; when the pressure in the pressure airbag exceeds the target range (such as exceeding 1.05*target pressure value or higher than the safety threshold), the system will automatically stop the operation of the inflation pump and the air release valve, and send an abnormal alarm signal to the upper computer, which can quickly adjust the equipment status when an abnormality is detected to ensure that the pressure does not increase or release excess pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0025] Figure 1 It is an overall flow chart of the pressure stabilization control method of the present invention;

[0026] Figure 2 This is a flow chart of inflation control in an embodiment of the present invention;

[0027] Figure 3 This is a flow chart of deflation control in an embodiment of the present invention;

[0028] Figure 4 It is a schematic diagram of the structure of the charging and discharging part of the pressure stabilization control system of the present invention. DETAILED DESCRIPTION

[0029] The present invention will be described more clearly and completely below by way of a preferred embodiment in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiment.

[0030] like Figure 1 As shown, a pressure stabilization control method without a gas storage tank comprises the following steps:

[0031] S1. The upper computer sets the target pressure value as the basis for pressure regulation and sends inflation or deflation instructions to the lower computer;

[0032] S2, collecting the current pressure value in the pressure bag in real time through the pressure sensor, and monitoring the deviation between the current pressure value and the target pressure value;

[0033] S3, determining a turning point according to the relationship between the output pressure value of the inflation pump and the inflation speed, wherein the turning point is the dividing point at which the output pressure of the inflation pump begins to decrease as the inflation speed increases after the inflation speed increases to a certain critical value;

[0034] In one embodiment, the turning point is determined by the following steps:

[0035] S31, discretize the relationship curve between the output pressure value of the inflation pump and the inflation speed, and generate a discrete data point set {(v i ,P(v i )|i=1,2,…,N)}, where v i represents the discretized inflation velocity, P(v i ) represents the corresponding air pump output pressure, i represents the index, and N represents the number of discrete points, which depends on the discrete interval;

[0036] S32. For each discrete point v i , calculate the pressure change variance of the front interval and the rear interval respectively. The specific calculation formula is:

[0037]

[0038] in, and They represent the pressure change variance of the front interval and the pressure change variance of the back interval respectively, and Respectively represent v i The average pressure value and v of the first k points i The average pressure value of the last k points, j represents the index of the discrete point in the front and back intervals, k represents the number of discrete points in the front and back intervals, and k is a constant used to define the length of the front and back intervals, that is, how many discrete points are taken to calculate the variance;

[0039] S33, calculate the ratio of the variance of the pressure change in the front and rear intervals, and generate a discrete difference curve Among them, when R(v i)>1, indicating that the pressure change in the front interval fluctuates more. i )<1, indicating that the pressure change in the latter interval fluctuates more, R(v i )=1, indicating that the fluctuations of the previous and next intervals are consistent;

[0040] S34, through the discrete difference curve R (v i ) determines the turning point v t , Where arg max means finding R(v i )'s maximum v i .

[0041] S4, after the lower computer receives the inflation command, it dynamically selects the inflation speed before and after the turning point according to the difference between the current pressure value and the target pressure value, and stops inflating after inflating to the target pressure value or receiving the stop command issued by the upper computer;

[0042] The inflation process comprises the following steps:

[0043] S41, after receiving the inflation target pressure value and the inflation start instruction from the upper computer, the lower computer verifies whether the target pressure value is within the preset range. If the target pressure value is valid, the inflation process is entered. If the target pressure value is invalid, the operation is stopped and the abnormal information is fed back to the upper computer;

[0044] S42, determining the relationship between the current pressure value and the target pressure value, if the current pressure value is less than the target pressure value, starting the inflation process; if the current pressure value is greater than or equal to the target pressure value, entering the gas replenishment process or stopping the operation;

[0045] S43. When entering the inflation process, dynamically adjust the inflation speed according to the target pressure value and the current pressure value: when the target pressure value is less than 150 mmHg, set the inflation speed to the speed before the turning point; when the target pressure value is greater than 150 mmHg and the current pressure value is less than 0.95*target pressure value, set the inflation speed to the speed after the turning point; if the current pressure value is greater than or equal to 0.95*target pressure value, set the inflation speed to the speed before the turning point;

[0046] S44, open the inflation valve and wait for the inflation valve to stabilize, then start the inflation pump and continuously monitor the current pressure value;

[0047] S45, if the current pressure value is ≥0.95*target pressure value, gradually reduce the inflation speed to before the turning point; if the current pressure value is ≥1.05*target pressure value, close the inflation valve and wait for the inflation valve to close stably;

[0048] S46, turn off the inflation pump to stop inflation, and report the inflation completion to the upper computer;

[0049] S47: During the inflation process, if a stop command is received, the inflation valve and the inflation pump are immediately closed, and the status is fed back to the host computer.

[0050] The gas replenishment process comprises the following steps:

[0051] S421, determine whether the current pressure value is lower than the target pressure value: if the current pressure value is lower than the target pressure value for more than 500ms, start the gas replenishment process; if the current pressure value reaches the target range, stop the gas replenishment operation;

[0052] S422, setting the inflation speed to the speed before the turning point, turning on the inflation pump, and waiting for the inflation pump to run stably;

[0053] S423, opening the inflation valve and continuously monitoring the current pressure value;

[0054] S424, if the current pressure value is greater than 1.05*target pressure value, close the inflation valve and wait for the inflation valve to close stably, then turn off the inflation pump;

[0055] S425, cyclically performing pressure monitoring and air replenishment until the current pressure value reaches the target pressure value;

[0056] S426: If a stop command is received during the air filling process, the air pump and the air filling valve are immediately turned off, and the operation is terminated;

[0057] S427: If abnormal pressure or equipment failure is detected, stop replenishing gas and feed back abnormal information to the host computer.

[0058] The inflation speed is controlled and adjusted by a PWM signal, specifically comprising the following steps:

[0059] According to the difference between the target pressure value and the current pressure value, the duty cycle of the PWM signal is calculated in real time;

[0060] When the current pressure value is less than 0.95*target pressure value, a high duty cycle PWM signal is generated to drive the inflatable device at a high speed after the turning point;

[0061] When the current pressure value is within the range of 0.95-1.05 of the target pressure value, a low duty cycle PWM signal is generated to drive the inflatable device at a low speed before the turning point;

[0062] During the inflation process, the duty cycle of the PWM signal is dynamically adjusted according to the real-time pressure value to ensure that the current pressure value gradually approaches the target pressure value;

[0063] When the current pressure value is greater than 1.05*target pressure value, the PWM signal output is stopped and the inflation device is turned off.

[0064] PWM stands for Pulse Width Modulation, which is a method of controlling analog signals such as power supplies or motors;

[0065] The duty cycle is the percentage of the high level duration in a pulse cycle to the cycle. Here, the ratio of the high level time to the pulse cycle is defined as the positive duty cycle, and the ratio of the low level time cycle is defined as the negative duty cycle. That is, the sum of the positive and negative duty cycles is the entire pulse cycle.

[0066] Below we use positive duty cycle to illustrate the relationship between duty cycle and motor speed or torque. Below positive duty cycle is collectively referred to as duty cycle.

[0067] Duty cycle and are often used in PWM control to represent the relationship between input and output voltages, specifically [input voltage * duty cycle = output voltage (average voltage)].

[0068] According to the calculation formula of DC motor terminal voltage (input motor voltage) and output speed R a ,I a are the resistance and current of the motor armature, C e is the constant of the motor itself, U is the input voltage of the motor, is the air gap flux of the motor, and RPM is the output speed of the motor. That is, except for the voltage supplied to the motor, the other parameters are fixed and unchanged in the motor. From the formula, it can be seen that the supply voltage and the motor speed are in a linear relationship. The greater the supply voltage, the greater the motor output speed. Output power P when the motor is supplied with voltage w Increases, the output speed n of the motor increases, and the output torque T of the motor can increase or decrease. According to the process of the motor from a stationary state to running, it can be known that the motor torque increases with the increase of voltage.

[0069] In summary, the duty cycle is proportional to the motor supply voltage, that is, proportional to the motor speed, and positively correlated with the motor torque but not linearly. It should be noted that the recognition that the torque decreases when the motor speed increases requires the motor output power P. w If it is constant, it cannot be applied otherwise.

[0070] For the air pump of the present invention, the relationship between the output pressure and the duty cycle can be understood as follows:

[0071] The power of the air pump comes from the output torque of the motor. The duty cycle changes the output torque of the motor and thus changes the output pressure of the air pump. For gas media, the pressure change can be calculated according to the ideal gas state equation PV = nRT, P is the gas pressure, unit Pa, V is the volume of the gas, unit m 3, T is Kelvin temperature, unit K, n is the amount of gas substance, unit mol, R is the molar gas constant, unit J / (mol*K), that is, the pressure changes with the change of the volume of the air pump. When the volume changes from large to small, the absolute pressure increases, and when the volume changes from small to large, the absolute pressure decreases. Since the volume of the air pump of the present invention has been determined during the suction and discharge process, the pressure of the air pump changes in a positive correlation with the output torque of the motor within the limit pressure range of the air pump design, that is, the greater the duty cycle, the greater the output torque of the motor, and the greater the output pressure of the air pump. Therefore, in the present invention, the value of the duty cycle can be expressed as the value of the inflation speed.

[0072] S5. After the lower computer receives the deflation command, it starts the deflation process to release the pressure, and stops deflation when the current pressure value returns to the target range or after receiving the stop command issued by the upper computer;

[0073] The degassing process comprises the following steps:

[0074] S51, the lower computer receives the start deflation instruction from the upper computer and determines the current pressure value;

[0075] S52, if the current pressure value is greater than 0 mmHg, start the deflation process; if the current pressure value is less than or equal to 0 mmHg, stop the deflation operation and close the deflation valve;

[0076] S53, after entering the deflation process, open the deflation valve and continuously monitor the current pressure value;

[0077] S54: When the current pressure value is less than 5 mmHg and lasts for more than 2 seconds, close the air release valve;

[0078] S55, if a stop command is received during the deflation process, immediately close the deflation valve and terminate the deflation operation;

[0079] S56. After deflation is completed, close the deflation valve and report the deflation completion status to the host computer.

[0080] S6. During the inflation or deflation process, the pressure sensor collects the current pressure value in the pressure bag in real time and dynamically adjusts the operating parameters. When abnormal pressure or equipment failure is detected, all operations are terminated immediately and the abnormal status is fed back.

[0081] A pressure stabilization control system without a gas storage tank, used to implement a pressure stabilization control method without a gas storage tank as described above, comprising:

[0082] The upper computer is used to set the target pressure value and send the command to start inflation or deflation to the lower computer, and at the same time verify whether the target pressure value is within the preset range. If the target pressure value is invalid, an abnormal information is generated and the operation is stopped;

[0083] The lower computer is used to receive the target pressure value and instructions set by the upper computer, and dynamically control the inflation pump, inflation valve and deflation valve in combination with the real-time pressure data fed back by the pressure sensor to achieve pressure regulation and perform inflation or deflation operations;

[0084] a pressure bladder that stores gas and responds to inflation and deflation operations;

[0085] The pressure sensor is used to collect the current pressure value inside the pressure airbag in real time and feed the pressure data back to the lower computer;

[0086] The air pump is used to inflate the pressure airbag by dynamically adjusting the inflation speed. The inflation speed is dynamically controlled by the lower computer according to the difference between the current pressure value and the target pressure value and the speed turning point characteristics;

[0087] The inflation valve is used to control the output airflow of the inflation pump to the pressure airbag to achieve precise pressure regulation;

[0088] The relief valve is used to release excess pressure from the pressure airbag. The opening and closing of the relief valve is controlled by the lower computer according to whether the current pressure value exceeds the target range.

[0089] Example

[0090] In this embodiment, the turning point of the inflation speed is set to 75%, and the preset range of the target pressure value is 0 to 400 mmHg.

[0091] like Figure 2 As shown, the specific processing of inflation control by the lower computer is as follows:

[0092] S11, after receiving the inflation target value and the inflation start command from the upper computer, the lower computer verifies the validity of the inflation target pressure value, which should be within the range of 0 to 400 mmHg. If it is valid, S12 is executed, otherwise S15 is executed and reported to the upper computer;

[0093] S12, determine the current pressure value, if it is less than the target pressure value, execute S13, otherwise execute S14;

[0094] S13, execute the inflation process:

[0095] S131, detect the target pressure value, if the target pressure value is <150mmHg, set the inflation speed to 35%; otherwise, determine the current pressure value, if the current pressure value is <0.95*target pressure value, set the inflation speed to 80%, if the current pressure value is ≥0.95*target pressure value, set the inflation speed to 35%;

[0096] S132, open the inflation valve and wait for the inflation valve to open stably, the waiting time is 50ms;

[0097] S133, turning on the air pump;

[0098] S134, detect the current pressure value. If the current pressure value is ≥ 0.95*target pressure value, adjust the inflation speed to slowly decrease from the original value to 35% within 500ms. If the current pressure value is ≥ 1.05*target pressure value, close the inflation valve and wait for the inflation valve to close stably for 50ms.

[0099] S135, turning off the air pump and reporting that the inflation is completed;

[0100] S136: During the inflation process, if a stop command is received from the host computer, execute S15;

[0101] S14, execute the gas replenishment process:

[0102] S141, detect the current pressure value. If the current pressure value is less than the target pressure value and lasts for more than 500ms, set the inflation speed to 35%, turn on the inflation pump, and wait for the inflation pump to turn on and stabilize for 50ms;

[0103] S142, opening the inflation valve;

[0104] S143, detect the current pressure value, if the current pressure value ≥ 1.05 * target pressure value, close the inflation valve, and wait for the inflation valve to close stably, the waiting time is 50ms;

[0105] S144, turn off the air pump;

[0106] S145, loop S141-S144, during the gas replenishment process, if a stop command is received from the host computer, execute S15;

[0107] S15, turn off the air pump, close the air valve, and stop inflation.

[0108] like Figure 3 As shown in the figure, the specific processing of deflation control by the lower computer is as follows:

[0109] S21, after the lower computer receives the start deflation command from the upper computer, if the current pressure value is > 0 mmHg, execute S22, otherwise execute S23;

[0110] S22, execute the deflation process:

[0111] S221, open the air release valve;

[0112] S222, detect the current pressure value, if the current pressure value is less than 5mmHg and lasts for more than 2s, close the air release valve;

[0113] S223, reporting deflation completion, and executing S23;

[0114] S224: During the deflation process, if a stop command is received from the host computer, execute S23;

[0115] S23. Close the air release valve and stop releasing air.

[0116] like Figure 4 As shown, the pressure stabilizing system without an air storage tank provided in this embodiment includes an upper computer, a lower computer, an inflation control circuit, a deflation control circuit, a pressure sensor and a pressure airbag, wherein the inflation control circuit includes an inflation pump and an inflation valve, and the deflation control circuit includes an air release valve. The upper computer sets the target pressure value, controls the start and stop of inflation / deflation, and sends instructions to the lower computer. (1) After the lower computer receives the pressure target value and the inflation start instruction, the inflation control circuit is controlled to inflate. After the inflation reaches the target pressure value, the inflation is automatically stopped by the lower computer, or the inflation process can be stopped by the upper computer. (2) After the lower computer receives the deflation instruction, the deflation control circuit is controlled to deflate. After the deflation reaches below 5 mmHg and lasts for 2 seconds, the deflation is automatically stopped by the lower computer, or the deflation process can be stopped by the upper computer.

[0117] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A pressure stabilization control method without a gas storage tank, characterized in that: The following steps are involved: The upper computer sets the target pressure value as the basis for pressure regulation and sends inflation or deflation instructions to the lower computer; The current pressure value in the pressure bag is collected in real time through the pressure sensor, and the deviation between the current pressure value and the target pressure value is monitored; Determine a turning point based on the relationship between the output pressure value of the inflation pump and the inflation speed, wherein the turning point is the dividing point at which the output pressure of the inflation pump begins to decrease as the inflation speed increases after the inflation speed increases to a certain critical value; After the lower computer receives the inflation command, it dynamically selects the inflation speed before and after the turning point according to the difference between the current pressure value and the target pressure value, and stops inflating after inflating to the target pressure value or receiving the stop command issued by the upper computer; After the lower computer receives the deflation command, it starts the deflation process to release the pressure, and stops deflation when the current pressure value returns to the target range or after receiving the stop command issued by the upper computer; During the inflation or deflation process, the pressure sensor collects the current pressure value in the pressure airbag in real time and dynamically adjusts the operating parameters. When abnormal pressure or equipment failure is detected, all operations are terminated immediately and the abnormal status is fed back.

2. A pressure stabilization control method without a gas storage tank according to claim 1, characterized in that: The turning point is determined by the following steps: The relationship curve between the output pressure value of the inflation pump and the inflation speed is discretized to generate a discrete data point set {(v i ,P(v i )|i=1,2,…,N)}, where v i represents the discretized inflation velocity, P(v i ) represents the corresponding air pump output pressure, i represents the index, and N represents the number of discrete points; For each discrete point v i , calculate the pressure change variance of the front interval and the rear interval respectively. The specific calculation formula is: in, and They represent the pressure change variance of the front interval and the pressure change variance of the back interval respectively, and Respectively represent v i The average pressure value and v of the first k points i The average pressure value of the last k points, j represents the index of the discrete point in the front and back intervals, and k represents the number of discrete points contained in the front and back intervals; Calculate the ratio of the variance of the pressure change in the front and back intervals to generate a discrete difference curve Through the discrete difference curve R(v i ) determines the turning point v t , arg max means finding R(v i )'s maximum v i .

3. The pressure stabilization control method without a gas storage tank according to claim 1, characterized in that: The inflation process comprises the following steps: After receiving the inflation target pressure value and the inflation start command from the upper computer, the lower computer verifies whether the target pressure value is within the preset range. If the target pressure value is valid, the inflation process is started. If the target pressure value is invalid, the operation is stopped and the abnormal information is fed back to the upper computer. Determine the relationship between the current pressure value and the target pressure value. If the current pressure value is less than the target pressure value, start the inflation process; if the current pressure value is greater than or equal to the target pressure value, enter the inflation process or stop the operation; When entering the inflation process, the inflation speed is dynamically adjusted according to the target pressure value and the current pressure value: when the target pressure value is less than 150 mmHg, the inflation speed is set to the speed before the turning point; when the target pressure value is greater than 150 mmHg and the current pressure value is less than 0.95*target pressure value, the inflation speed is set to the speed after the turning point; if the current pressure value is greater than or equal to 0.95*target pressure value, the inflation speed is set to the speed before the turning point; After opening the inflation valve and waiting for it to stabilize, start the inflation pump and continuously monitor the current pressure value; If the current pressure value is ≥0.95*target pressure value, gradually reduce the inflation speed to before the turning point; if the current pressure value is ≥1.05*target pressure value, close the inflation valve and wait for the inflation valve to close and stabilize; Turn off the air pump to stop inflation and report the completion of inflation to the upper computer; During the inflation process, if a stop command is received, the inflation valve and inflation pump will be closed immediately, and the status will be fed back to the host computer.

4. A pressure stabilization control method without a gas storage tank according to claim 3, characterized in that: The gas replenishment process comprises the following steps: Determine whether the current pressure value is lower than the target pressure value: if the current pressure value is lower than the target pressure value for more than 500ms, start the air replenishment process; if the current pressure value reaches the target range, stop the air replenishment operation; Set the inflation speed to the speed before the turning point, turn on the inflation pump, and wait for the inflation pump to run stably; Open the inflation valve and continuously monitor the current pressure value; If the current pressure value is greater than 1.05*target pressure value, close the inflation valve and wait for the inflation valve to close stably before turning off the inflation pump; The pressure monitoring and air replenishment are performed cyclically until the current pressure value reaches the target pressure value; If a stop command is received during the air filling process, the air pump and the air filling valve will be immediately turned off and the operation will be terminated; If abnormal pressure or equipment failure is detected, gas replenishment will be stopped and abnormal information will be fed back to the host computer.

5. The pressure stabilization control method without a gas storage tank according to claim 1, characterized in that: The degassing process comprises the following steps: The lower computer receives the deflation start instruction from the upper computer and determines the current pressure value; If the current pressure value is greater than 0 mmHg, start the deflation process; if the current pressure value is less than or equal to 0 mmHg, stop the deflation operation and close the deflation valve; After entering the deflation process, open the deflation valve and continuously monitor the current pressure value; When the current pressure value is less than 5mmHg and lasts for more than 2 seconds, close the air release valve; If a stop command is received during the deflation process, the deflation valve will be closed immediately and the deflation operation will be terminated; After deflation is completed, close the deflation valve and report the deflation completion status to the host computer.

6. The pressure stabilization control method without a gas storage tank according to claim 1, characterized in that: The inflation speed is controlled and adjusted by a PWM signal, specifically comprising the following steps: According to the difference between the target pressure value and the current pressure value, the duty cycle of the PWM signal is calculated in real time; When the current pressure value is less than 0.95*target pressure value, a high duty cycle PWM signal is generated to drive the inflatable device at a high speed after the turning point; When the current pressure value is within the range of 0.95-1.05 of the target pressure value, a low duty cycle PWM signal is generated to drive the inflatable device at a low speed before the turning point; During the inflation process, the duty cycle of the PWM signal is dynamically adjusted according to the real-time pressure value to ensure that the current pressure value gradually approaches the target pressure value; When the current pressure value is greater than 1.05*target pressure value, the PWM signal output is stopped and the inflation device is turned off.

7. A pressure stabilization control system without a gas storage tank, used to implement a pressure stabilization control method without a gas storage tank as claimed in any one of claims 1 to 6, characterized in that: include: The upper computer is used to set the target pressure value and send the command to start inflation or deflation to the lower computer, and at the same time verify whether the target pressure value is within the preset range. If the target pressure value is invalid, an abnormal information is generated and the operation is stopped; The lower computer is used to receive the target pressure value and instructions set by the upper computer, and dynamically control the inflation pump, inflation valve and deflation valve in combination with the real-time pressure data fed back by the pressure sensor to achieve pressure regulation and perform inflation or deflation operations; a pressure bladder that stores gas and responds to inflation and deflation operations; The pressure sensor is used to collect the current pressure value inside the pressure airbag in real time and feed the pressure data back to the lower computer; The air pump is used to inflate the pressure airbag by dynamically adjusting the inflation speed. The inflation speed is dynamically controlled by the lower computer according to the difference between the current pressure value and the target pressure value and the speed turning point characteristics; The inflation valve is used to control the output airflow of the inflation pump to the pressure airbag to achieve precise pressure regulation; The relief valve is used to release excess pressure from the pressure airbag. The opening and closing of the relief valve is controlled by the lower computer according to whether the current pressure value exceeds the target range.

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