A double air chamber balance control system and control method thereof

Abstract

The present application relates to the technical field of medical cabins, and discloses a dual air cabin balance control system and a control method thereof, wherein the system comprises: a first pressure sensor fixedly installed at a first monitoring point position of a positive pressure cabin, a second pressure sensor fixedly installed at a second monitoring point position of a negative pressure cabin, and a microcontroller, wherein the first pressure sensor and the second pressure sensor are respectively electrically connected to the input end of the microcontroller; a first switch valve is connected to the positive pressure cabin, and a second switch valve is connected to the negative pressure cabin, and the first switch valve and the second switch valve are respectively electrically connected to the output end of the microcontroller; the positive pressure cabin is also connected to a positive pressure pump for air intake, and the negative pressure cabin is also connected to a negative pressure pump for air outlet, and the positive pressure pump and the negative pressure pump are respectively electrically connected to the output end of the microcontroller. The present application has the effect of extending the service life of the device, reducing the energy consumption of the pressure cabin, and reducing the maintenance cost of the pressure cabin.

Description

Technical Field

[0001] The present application relates to the technical field of medical cabins, and in particular to a double air cabin balance control system and a control method thereof. Background Art

[0002] At present, the pressure chamber is a complex medical equipment that combines multidisciplinary technologies such as gas, mechanical, electrical engineering, physiology, medicine, etc., and is used to supply gases for terminal use.

[0003] In the prior art, the control system of the pressure cabin adopts a constant pressure control method, by using a vortex pump to continuously inhale and exhaust air, and according to the pressure detection device at the monitoring point, the pressure of the positive pressure cabin and the negative pressure cabin are respectively sensed, and then the first switch valve and the second switch valve are used to adjust the pressure of the positive pressure cabin and the negative pressure cabin respectively, and when the first switch valve and the second switch valve fail, the first safety valve and the second safety valve will be used to release the flow to keep the pressure of the positive pressure cabin and the negative pressure cabin constant, thereby ensuring that the terminal can be supplied with gas for use. However, the vortex pump in this control method is always in the maximum power working state. When there is no need to supply gas for use to the terminal, the vortex pump is still in the full power operation state, resulting in a high working frequency of the first switch valve and the second switch valve, and thus a high energy consumption of the equipment. At the same time, the service life of the components in the equipment is shortened.

[0004] With respect to the above-mentioned related technologies, the inventors found that the existing pressure chamber control system has the problems of high energy consumption and high equipment maintenance cost. Summary of the invention

[0005] In order to reduce the energy consumption of the pressure chamber control system and reduce the maintenance cost of the pressure chamber control system, the present application provides a dual air chamber balance control system and a control method thereof.

[0006] In a first aspect, the present application provides a dual air chamber balance control system.

[0007] This application is achieved through the following technical solutions:

[0008] A dual air chamber balance control system, comprising a first pressure detection device for monitoring the pressure of a positive pressure chamber and a second pressure detection device for monitoring the pressure of a negative pressure chamber, respectively located at preset monitoring points, the positive pressure chamber is connected to a first switch valve, the negative pressure chamber is connected to a second switch valve, and further comprising a microcontroller;

[0009] The first switch valve and the second switch valve are electrically connected to the output end of the microcontroller respectively;

[0010] The first pressure detection device is a first pressure sensor, which is fixedly installed at a first monitoring point of the positive pressure cabin, and the second pressure detection device is a second pressure sensor, which is fixedly installed at a second monitoring point of the negative pressure cabin, and the first pressure sensor and the second pressure sensor are electrically connected to the input end of the microcontroller respectively;

[0011] The positive pressure cabin is also connected to a positive pressure pump for air intake, and the negative pressure cabin is also connected to a negative pressure pump for air discharge, and the positive pressure pump and the negative pressure pump are respectively electrically connected to the output end of the microcontroller;

[0012] When the pressure value fed back by the first pressure sensor reaches a preset first threshold, the microcontroller controls the positive pressure pump to decelerate to a stop state and controls the first switch valve to close; or when the pressure value fed back by the second pressure sensor reaches a preset second threshold, the microcontroller controls the negative pressure pump to decelerate to a stop state and controls the second switch valve to close.

[0013] In a preferred example, the present application may be further configured as follows: a ventilation device is further provided between the positive pressure cabin and the negative pressure cabin;

[0014] The ventilation device includes a third pressure sensor, a fourth pressure sensor and a solenoid valve, the third pressure sensor is fixedly installed at the third monitoring point of the positive pressure cabin, the fourth pressure sensor is fixedly installed at the fourth monitoring point of the negative pressure cabin, the solenoid valve is fixedly installed between the positive pressure cabin and the negative pressure cabin, the third pressure sensor and the fourth pressure sensor are electrically connected to the input end of the microcontroller respectively, and the solenoid valve is electrically connected to the output end of the microcontroller;

[0015] When the pressure value fed back by the third pressure sensor exceeds a preset third threshold and the pressure value fed back by the fourth pressure sensor exceeds a preset fourth threshold, the microcontroller first controls the solenoid valve to open until the pressure value fed back by the third pressure sensor reaches the first threshold, or when the pressure value fed back by the fourth pressure sensor reaches the second threshold, the microcontroller controls the solenoid valve to close; wherein, the first threshold is less than the third threshold, and the fourth threshold is greater than the second threshold.

[0016] In a preferred example, the present application can be further configured as follows: it also includes a third switch valve for controlling the output of the gas used in the positive pressure chamber and a fourth switch valve for controlling the intake of the gas used in the negative pressure chamber, and the third switch valve and the fourth switch valve are electrically connected to the output end of the microcontroller respectively.

[0017] In a preferred example, the present application may be further configured as follows: a first safety valve is also fixedly installed on the positive pressure cabin, and the first safety valve is electrically connected to the output end of the microcontroller;

[0018] When the first switch valve fails, the microcontroller controls the first safety valve to open to replace the first switch valve.

[0019] In a preferred example, the present application may be further configured as follows: a second safety valve is also fixedly installed on the negative pressure cabin, and the second safety valve is electrically connected to the output end of the microcontroller;

[0020] When the second switch valve fails, the microcontroller controls the second safety valve to open to replace the second switch valve.

[0021] In a preferred example, the present application can be further configured as follows: both the positive pressure pump and the negative pressure pump are PID controlled variable speed pumps.

[0022] In a preferred example, the present application can be further configured as follows: the first switch valve and the second switch valve both adopt PWM controlled valves.

[0023] In a second aspect, the present application provides a dual air chamber balance control method.

[0024] This application is achieved through the following technical solutions:

[0025] A dual air chamber balance control method is applied to the above dual air chamber balance control system, and its microcontroller performs the following steps:

[0026] Initialization, controlling the first switch valve and the second switch valve to open, controlling the positive pressure pump and the negative pressure pump to open, and obtaining the pressure values ​​of the first pressure sensor and the second pressure sensor in real time;

[0027] When the pressure value fed back by the first pressure sensor reaches a preset first threshold value, the positive pressure pump is controlled to decelerate to a stop state, and the first switch valve is controlled to be closed; or when the pressure value fed back by the second pressure sensor reaches a preset second threshold value, the negative pressure pump is controlled to decelerate to a stop state, and the second switch valve is controlled to be closed.

[0028] In a preferred example, the present application can be further configured as follows: the microcontroller further performs the following steps:

[0029] Acquire the pressure values ​​fed back by the third pressure sensor and the fourth pressure sensor in real time;

[0030] When the pressure value fed back by the first pressure sensor exceeds the first threshold, determine whether the pressure value fed back by the third pressure sensor exceeds a preset third threshold; and when the pressure value fed back by the second pressure sensor exceeds the second threshold, determine whether the pressure value fed back by the fourth pressure sensor exceeds a preset fourth threshold;

[0031] When the pressure value fed back by the third pressure sensor exceeds the preset third threshold value and the pressure value fed back by the fourth pressure sensor exceeds the preset fourth threshold value, the solenoid valve is first controlled to open, and at this time the positive pressure pump and the negative pressure pump work normally;

[0032] Determine whether the pressure value fed back by the third pressure sensor reaches the first threshold, and determine whether the pressure value fed back by the fourth pressure sensor reaches the second threshold;

[0033] When the pressure value fed back by the third pressure sensor reaches the first threshold, or when the pressure value fed back by the fourth pressure sensor reaches the second threshold, the microcontroller controls the solenoid valve to close; wherein, the first threshold is less than the third threshold, and the fourth threshold is greater than the second threshold.

[0034] In a preferred example, the present application can be further configured as follows: the microcontroller further performs the following steps:

[0035] When the pressure value fed back by the third pressure sensor does not reach the first threshold and the pressure value fed back by the fourth pressure sensor does not reach the second threshold, determining whether the pressure value fed back by the third pressure sensor reaches the third threshold;

[0036] When the pressure value fed back by the third pressure sensor reaches the third threshold, the first switch valve is controlled to operate until the pressure value fed back by the third pressure sensor reaches the first threshold, the positive pressure pump is controlled to decelerate to a stop state, and the first switch valve is controlled to close.

[0037] In a preferred example, the present application can be further configured as follows: the microcontroller further performs the following steps:

[0038] When the pressure value fed back by the third pressure sensor does not reach the first threshold and the pressure value fed back by the fourth pressure sensor does not reach the second threshold, determining whether the pressure value fed back by the fourth pressure sensor reaches the fourth threshold;

[0039] When the pressure value fed back by the fourth pressure sensor reaches the fourth threshold value, the second switch valve is controlled to operate until the pressure value fed back by the fourth pressure sensor reaches the second threshold value, the negative pressure pump is controlled to decelerate to a stop state, and the second switch valve is controlled to close.

[0040] In a preferred example, the present application can be further configured as follows: the step of controlling the positive pressure pump to decelerate to a stop state includes:

[0041] The real-time speed of the positive pressure pump is determined using a multi-contact network PID algorithm, and the formula is as follows:

[0042]

[0043] In the formula, is the real-time speed of the positive pressure pump; is the positive proportional coefficient of the PID controller; It is the deviation between the set value and the actual value, that is, the system deviation between the current pressure value and the expected pressure value; is the positive integral coefficient of the PID controller; is the positive differential coefficient of the PID controller.

[0044] In a preferred example, the present application may be further configured as follows: the step of controlling the negative pressure pump to decelerate to a stop state includes:

[0045] The real-time speed of the negative pressure pump is determined using a multi-contact network PID algorithm, and the formula is as follows:

[0046]

[0047] In the formula, is the real-time speed of the negative pressure pump; is the negative proportional coefficient of the PID controller; It is the deviation between the set value and the actual value, that is, the system deviation between the current pressure value and the expected pressure value; is the negative integral coefficient of the PID controller; is the negative differential coefficient of the PID controller.

[0048] In a preferred example, the present application can be further configured as follows: the initialization, when controlling the first switch valve to open, adopts a PWM control method, including the following steps:

[0049] Real-time detection of the current gas flow rate in the positive pressure cabin;

[0050] When the current gas flow rate in the positive pressure cabin is lower than the preset first gas flow rate, the first switch valve is controlled to be fully opened by using a long stroke;

[0051] When the current gas flow rate in the positive pressure cabin reaches the preset second gas volume, a short stroke is used to control the first switch valve to open 1 / 2 stroke or 1 / 4 stroke.

[0052] In a preferred example, the present application can be further configured as follows: the initialization, when controlling the second switch valve to open, adopts a PWM control method, including the following steps:

[0053] Real-time detection of the current gas flow in the negative pressure cabin;

[0054] When the current gas flow rate in the negative pressure cabin is lower than the preset third gas flow rate, the second switch valve is controlled to be fully opened by using a long stroke;

[0055] When the current gas flow rate in the negative pressure chamber reaches the preset fourth gas volume, a short stroke is used to control the second switch valve to open 1 / 2 stroke or 1 / 4 stroke.

[0056] In a preferred example, the present application can be further configured as follows: the value range of the third threshold is (600 mmHg, 800 mmHg).

[0057] In a preferred example, the present application can be further configured as follows: the value range of the fourth threshold is (-700 mmHg, -500 mmHg).

[0058] In a third aspect, the present application provides a computer device.

[0059] This application is achieved through the following technical solutions:

[0060] A computer device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of any one of the above-mentioned dual air chamber balance control methods when executing the computer program.

[0061] In a fourth aspect, the present application provides a computer-readable storage medium.

[0062] This application is achieved through the following technical solutions:

[0063] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of any one of the above-mentioned dual air compartment balance control methods are implemented.

[0064] In a fifth aspect, the present application provides a computer program product.

[0065] This application is achieved through the following technical solutions:

[0066] A computer program product comprises a computer program, wherein when the computer program is executed by a processor, the steps of any one of the above-mentioned dual air compartment balance control methods are implemented.

[0067] In summary, compared with the prior art, the technical solution provided by this application has at least the following beneficial effects:

[0068] A first pressure detecting device fixedly installed at the first monitoring point of the positive pressure cabin adopts a first pressure sensor, and a second pressure detecting device fixedly installed at the second monitoring point of the negative pressure cabin adopts a second pressure sensor, which has the advantages of convenient installation, strong durability, high detection accuracy and stable operation; the first pressure sensor and the second pressure sensor are electrically connected to the input end of the microcontroller respectively to provide the microcontroller with real-time feedback of the pressure in the positive pressure cabin and the pressure in the negative pressure cabin; the positive pressure cabin is also connected to a positive pressure pump for air intake, and the negative pressure cabin is also connected to a negative pressure pump for air outlet, and the positive pressure pump and the negative pressure pump are electrically connected to the output end of the microcontroller respectively, so as to use the positive pressure pump to pump air into the positive pressure cabin and the negative pressure pump to pump air from the negative pressure cabin, thereby replacing the pumping and pumping work of the vortex pump in the prior art, playing a role of reasonable division of labor and facilitating prolonging the service life of the device; the positive pressure cabin is connected to a first switch valve, and the negative pressure cabin is connected to a second switch valve. The two switch valves are electrically connected to the output end of the microcontroller, respectively, so that the pressure of the positive pressure cabin and the negative pressure cabin can be adjusted by the microcontroller controlling the opening / closing of the first switch valve and the second switch valve to keep the pressure of the positive pressure cabin and the negative pressure cabin constant; when the pressure value fed back by the first pressure sensor reaches a preset first threshold value, that is, the positive pressure cabin stops supplying gas for use, the microcontroller controls the positive pressure pump to decelerate to a stop state, and controls the first switch valve to close at the same time, or when the pressure value fed back by the second pressure sensor reaches a preset second threshold value, that is, the negative pressure cabin stops inputting gas for use, the microcontroller controls the negative pressure pump to decelerate to a stop state, and controls the second switch valve to close at the same time, so as to reduce the operating frequency of the positive / negative pressure pump and the first / second switch valve, the positive / negative pressure pump and the first / second switch valve do not need to run at full power, thereby reducing the power consumption of the device, making the pressure control of the control system more precise, reducing the frequency of use of the devices in the control system, extending their life, and reducing the power consumption of the entire control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] Figure 1 A structural block diagram of a dual air chamber balance control system provided as an exemplary embodiment of the present application.

[0070] Figure 2 A main flow chart of a dual air chamber balance control method provided as yet another exemplary embodiment of the present application. DETAILED DESCRIPTION

[0071] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

[0072] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are 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.

[0073] In addition, the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article, unless otherwise specified, generally means that the associated objects before and after are in an "or" relationship.

[0074] The embodiments of the present application are further described in detail below in conjunction with the drawings in the specification.

[0075] Reference Figure 1 , the embodiment of the present application provides a dual air chamber balance control system, including a first pressure detection device for monitoring the pressure of the positive pressure chamber and a second pressure detection device for monitoring the pressure of the negative pressure chamber, which are respectively located at preset monitoring points, the positive pressure chamber is connected to a first switch valve, the negative pressure chamber is connected to a second switch valve, and also includes a microcontroller;

[0076] The first switch valve and the second switch valve are electrically connected to the output end of the microcontroller respectively;

[0077] The first pressure detection device is a first pressure sensor, which is fixedly installed at a first monitoring point of the positive pressure cabin, and the second pressure detection device is a second pressure sensor, which is fixedly installed at a second monitoring point of the negative pressure cabin, and the first pressure sensor and the second pressure sensor are electrically connected to the input end of the microcontroller respectively;

[0078] The positive pressure cabin is also connected to a positive pressure pump for air intake, and the negative pressure cabin is also connected to a negative pressure pump for air discharge, and the positive pressure pump and the negative pressure pump are respectively electrically connected to the output end of the microcontroller;

[0079] When the pressure value fed back by the first pressure sensor reaches a preset first threshold, the microcontroller controls the positive pressure pump to decelerate to a stop state and controls the first switch valve to close; or when the pressure value fed back by the second pressure sensor reaches a preset second threshold, the microcontroller controls the negative pressure pump to decelerate to a stop state and controls the second switch valve to close.

[0080] Specifically, the first pressure sensor is fixedly installed at the first monitoring point of the positive pressure cabin, namely, pressure monitoring point 1, and the first monitoring point can be a position inside the positive pressure cabin near the air inlet of the positive pressure pump. The second pressure sensor is fixedly installed at the second monitoring point of the negative pressure cabin, namely, pressure monitoring point 2, and the second monitoring point can be a position inside the negative pressure cabin near the air outlet of the negative pressure pump. The first pressure sensor and the second pressure sensor are electrically connected to the input end of the microcontroller respectively to provide real-time feedback to the microcontroller on the pressure inside the positive pressure cabin and the pressure inside the negative pressure cabin.

[0081] In this embodiment, the microcontroller can be any one of AT89C5131A, STM32F107, Cortex-M4, etc. The microcontroller has the following advantages:

[0082] ‌1. Small size and low power consumption: usually using integrated circuit technology, very suitable for embedded systems and other scenarios that need to save space and power consumption;

[0083] 2. Low cost: Compared with traditional control devices, it can be widely used in various electronic equipment and systems;

[0084] 3. Strong programmability: The microcontroller has good programmability and can be programmed according to specific application scenarios to achieve various control and monitoring functions;

[0085] 4. Stable and reliable: The microcontroller has a high degree of integration, and the collaboration and stability between various functional units are guaranteed, with high reliability;

[0086] 5. Easy to maintain and upgrade: The software and hardware of the microcontroller can be upgraded and maintained to adapt to different application requirements;

[0087] 6. High integration: The microcontroller integrates multiple functional modules on a single chip, greatly reducing the complexity and cost of the system;

[0088] ‌7. High cost performance: Microcontrollers are relatively low in cost but powerful enough to meet the needs of most embedded systems‌;

[0089] 8. Strong flexibility: Microcontrollers can be programmed to implement different control logics and algorithms, and have strong flexibility;

[0090] ‌9. High-performance processing capability‌: The microcontroller can have a high-performance processor core and floating-point unit, capable of handling complex computing tasks‌;

[0091] 10. Rich peripheral interfaces: Microcontrollers usually have rich peripheral interfaces and functional modules, such as UART, SPI, I2C, PWM, ADC and timer, etc., to meet the needs of various embedded applications;

[0092] ‌11. Easy to develop‌: The microcontroller provides a wealth of development tools and middleware libraries, supports multiple programming languages, simplifies the development process and improves development efficiency‌.

[0093] The positive pressure pump is connected to the air inlet in the positive pressure cabin, the negative pressure pump is connected to the air outlet in the negative pressure cabin, and the positive pressure pump and the negative pressure pump are electrically connected to the output end of the microcontroller respectively.

[0094] The microcontroller controls the positive pressure pump to pump air into the positive pressure chamber and controls the negative pressure pump to pump air from the negative pressure chamber, so as to replace the pumping and exhausting work of the vortex pump in the prior art, thereby achieving a reasonable division of labor and being beneficial to extending the service life of the device.

[0095] The first switch valve 1 and the second switch valve 2 are electrically connected to the output terminals of the microcontroller respectively.

[0096] The microcontroller controls the first switch valve 1 and the second switch valve 2 to open / close to adjust the pressure of the positive pressure chamber and the negative pressure chamber, thereby keeping the pressure of the positive pressure chamber and the negative pressure chamber constant.

[0097] When the pressure value fed back by the first pressure sensor reaches a preset first threshold value, the value range of the first threshold value is (400mmHg, 600mmHg). For example, the first threshold value may be 500mmHg, that is, the positive pressure cabin stops supplying gas, and the microcontroller controls the positive pressure pump to decelerate to a stop state, and at the same time controls the first switch valve to close, so as to reduce the operating frequency of the positive pressure pump and the first switch valve. The positive pressure pump does not need to run at full power, and the first switch valve also stops working, thereby extending the service life of the device, reducing the energy consumption of the dual air cabin control system, and reducing the maintenance cost of the dual air cabin control system.

[0098] Alternatively, when the pressure value fed back by the second pressure sensor reaches a preset second threshold value, the value range of the second threshold value is (-500mmHg, -300mmHg), such as the second threshold value can be -400mmHg, that is, the negative pressure cabin stops inputting gas for use, and the microcontroller controls the negative pressure pump to decelerate to a stop state, and at the same time controls the second switch valve to close, so as to reduce the operating frequency of the negative pressure pump and the second switch valve. The negative pressure pump does not need to run at full power, and the second switch valve also stops working, which extends the service life of the device, reduces the energy consumption of the dual air cabin control system, and reduces the maintenance cost of the dual air cabin control system.

[0099] In one embodiment, a ventilation device is further provided between the positive pressure cabin and the negative pressure cabin;

[0100] The ventilation device includes a third pressure sensor, a fourth pressure sensor and a solenoid valve, the third pressure sensor is fixedly installed at the third monitoring point of the positive pressure cabin, that is, pressure monitoring point 3, the fourth pressure sensor is fixedly installed at the fourth monitoring point of the negative pressure cabin, that is, pressure monitoring point 4, the solenoid valve is fixedly installed between the positive pressure cabin and the negative pressure cabin, the third pressure sensor and the fourth pressure sensor are electrically connected to the input end of the microcontroller respectively, and the solenoid valve is electrically connected to the output end of the microcontroller;

[0101] When the pressure value fed back by the third pressure sensor exceeds a preset third threshold and the pressure value fed back by the fourth pressure sensor exceeds a preset fourth threshold, the microcontroller first controls the solenoid valve to open until the pressure value fed back by the third pressure sensor reaches the first threshold, or when the pressure value fed back by the fourth pressure sensor reaches the second threshold, the microcontroller controls the solenoid valve to close; wherein, the first threshold is less than the third threshold, and the fourth threshold is greater than the second threshold.

[0102] Specifically, the ventilation device is Figure 1 The ventilation device includes two pressure sensors (a third pressure sensor and a fourth pressure sensor) and a micro-solenoid valve. The third pressure sensor can be fixedly installed in the positive pressure cabin near the position of the solenoid valve, and the fourth pressure sensor can be fixedly installed in the negative pressure cabin near the position of the solenoid valve.

[0103] The third pressure sensor and the fourth pressure sensor are electrically connected to two more input terminals of the microcontroller respectively to provide the microcontroller with real-time feedback of another positive pressure sample value of the positive pressure cabin and another negative pressure sample value of the negative pressure cabin, thereby realizing multi-point monitoring of the control system pressure and making the pressure detection results more accurate, which is conducive to more accurate control of the pressure in the double air cabin.

[0104] The solenoid valve is electrically connected to another output end of the microcontroller so that when the positive pressure in the positive pressure cabin is too high, that is, the pressure value fed back by the third pressure sensor exceeds the preset third threshold value, and the negative pressure in the negative pressure cabin is too low, that is, the pressure value fed back by the fourth pressure sensor exceeds the preset fourth threshold value, the one-way ventilation device is first used to control the gas in the positive pressure cabin to flow to the negative pressure cabin, so that the pressure of the positive pressure cabin is supplemented to the negative pressure cabin, and due to the large positive and negative pressure difference, instantaneous pressure relief can be achieved, thereby efficiently protecting the control system gas circuit terminal.

[0105] Among them, the value range of the third threshold is (600 mmHg, 800 mmHg), and the third threshold may be 700 mmHg; the value range of the fourth threshold is (-700 mmHg, -500 mmHg), and the fourth threshold may be -600 mmHg.

[0106] In one embodiment, after the internal exchange solenoid valve is used and the solenoid valve is closed, if there is residual gas in the double air chamber at this time, that is, the pressure value feedback by the third pressure sensor does not reach the first threshold, or the pressure value feedback by the fourth pressure sensor does not reach the second threshold, and the solenoid valve is closed, the first switch valve 1 and the second switch valve 2 are used respectively for pressure relief protection, that is, the microcontroller controls the positive / negative pressure pump to decelerate to a stop state, and controls the first / second switch valve to close, so as to realize multi-point graded control of the system pressure.

[0107] A dual air chamber balance control system uses multi-point monitoring and hierarchical control to stabilize the air pressure, rather than separately controlling a positive pressure pump and separately controlling a negative pressure pump, wherein an internal exchange solenoid valve plays a role in fine-tuning the control system pressure, balancing the pressure and saving energy, and the positive / negative pressure pump and the first / second switch valve play a role in multiplexing the control system pressure, balancing the pressure and saving energy, which can more effectively reduce the working frequency and working time of the positive / negative pressure pump and the first / second switch valve, better extend the service life of the positive / negative pressure pump and the first / second switch valve components, and greatly reduce the energy consumption of the control system while ensuring the normal function of the control system. The multi-point monitoring and multi-point control multi-contact network control method makes the pressure control of the dual air chamber control system more precise and the system more stable.

[0108] In one embodiment, a dual air chamber balance control system also includes a third switch valve for controlling the output of the gas used in the positive pressure chamber and a fourth switch valve for controlling the intake of the gas used in the negative pressure chamber, and the third switch valve and the fourth switch valve are electrically connected to the output end of the microcontroller, respectively.

[0109] Specifically, the third switch valve 3 is fixedly installed at the air outlet position in the positive pressure cabin, the third switch valve 3 closes the air outlet of the positive pressure cabin, and the microcontroller controls the third switch valve 3 to open so that the use gas in the positive pressure cabin is output. The fourth switch valve 4 is fixedly installed at the air inlet position in the negative pressure cabin, the fourth switch valve 4 closes the air inlet of the negative pressure cabin, and the microcontroller controls the fourth switch valve 4 to open, so that the use gas enters the negative pressure cabin. The third switch valve 3 and the fourth switch valve 4 are the use gas terminal switches.

[0110] In one embodiment, a first safety valve is also fixedly installed on the positive pressure cabin, and the first safety valve is electrically connected to the output end of the microcontroller;

[0111] When the first switch valve fails, the microcontroller controls the first safety valve to open to replace the first switch valve.

[0112] In one embodiment, a second safety valve is also fixedly installed on the negative pressure cabin, and the second safety valve is electrically connected to the output end of the microcontroller;

[0113] When the second switch valve fails, the microcontroller controls the second safety valve to open to replace the second switch valve.

[0114] Specifically, the first safety valve 1 is fixedly installed at a position inside the positive pressure cabin that is staggered from the first switch valve 1, and the second safety valve 2 is fixedly installed at a position inside the negative pressure cabin that is staggered from the second switch valve 2. When the first switch valve 1 and the second switch valve 2 fail, the microcontroller controls the first safety valve 1 and the second safety valve 2 to open for discharge, thereby achieving the purpose of regulating the pressure of the positive pressure cabin and the negative pressure cabin to be constant, making the pressure relief control method of the dual air cabin balance control system more diversified, and the control system can work more stably and has stronger applicability.

[0115] In one embodiment, both the positive pressure pump and the negative pressure pump are PID controlled variable speed pumps.

[0116] By selecting a PID variable speed pump, when the positive pressure cabin is sensed to have reached the expected pressure, the PID control can be used to decelerate the positive pressure pump at a preset speed, and control the start and stop timing and real-time speed of the positive pressure pump. Alternatively, the PID control can be used to decelerate the negative pressure pump at a preset speed, and control the start and stop timing and real-time speed of the negative pressure pump, thereby achieving the effect of slow start and slow stop, and further reducing the energy consumption of the system.

[0117] In one embodiment, both the first switch valve and the second switch valve are PWM controlled valves.

[0118] By selecting PWM controlled valves, the length of the switch stroke of the first switch valve 1 and the second switch valve 2 can be adjusted. When a large amount of gas needs to pass through, a long stroke is used and the valve is fully opened; when a small amount of gas needs to pass through, a short stroke is used and the valve can be half-open or open 1 / 4 of the stroke, further reducing the energy consumption of the control system.

[0119] In summary, a dual air cabin balance control system has the advantages of convenient installation, strong durability, high detection accuracy and stable operation by fixing the first pressure sensor at the first monitoring point position of the positive pressure cabin, and fixing the second pressure sensor at the second monitoring point position of the negative pressure cabin; the first pressure sensor and the second pressure sensor are electrically connected to the input end of the microcontroller, respectively, to provide the microcontroller with real-time feedback of the pressure in the positive pressure cabin and the pressure in the negative pressure cabin; the positive pressure pump and the negative pressure pump are electrically connected to the output end of the microcontroller, respectively, to use the positive pressure pump to pump air into the positive pressure cabin and the negative pressure pump to pump air from the negative pressure cabin, thereby replacing the pumping and pumping work of the vortex pump in the prior art, playing a role of reasonable division of labor and facilitating extending the service life of the device; the first switch valve and the second switch valve are electrically connected to the output end of the microcontroller, respectively, to control the first switch valve through the microcontroller The pressure of the positive pressure cabin and the negative pressure cabin is adjusted by opening / closing the shut-off valve and the second shut-off valve to keep the pressure of the positive pressure cabin and the negative pressure cabin constant; when the pressure value fed back by the first pressure sensor reaches the preset first threshold value, that is, the positive pressure cabin stops supplying gas for use, the microcontroller controls the positive pressure pump to decelerate to a stop state, and controls the first shut-off valve to close at the same time, or when the pressure value fed back by the second pressure sensor reaches the preset second threshold value, that is, the negative pressure cabin stops inputting gas for use, the microcontroller controls the negative pressure pump to decelerate to a stop state, and controls the second shut-off valve to close at the same time, so as to reduce the working frequency of the positive / negative pressure pump and the first / second shut-off valve, the positive / negative pressure pump and the first / second shut-off valve do not need to run at full power, thus reducing the power consumption of the device, making the pressure control of the control system more precise, reducing the frequency of use of the devices in the control system, extending their lifespan, and reducing the power consumption of the entire control system.

[0120] A dual air chamber balance control system uses a positive pressure pump to pump air into the positive pressure chamber and a negative pressure pump to pump air from the negative pressure chamber. This eliminates the need for frequent operation of the vortex pump in the prior art, reduces the operating frequency of components in the system, and extends the life of the equipment. At the same time, it overcomes the problem of high power consumption of the vortex pump that is always operating at maximum power.

[0121] A dual air chamber balance control system, when positive or negative pressure is overpressured, first activates the one-way ventilation device to exchange gas inside the positive pressure chamber and the negative pressure chamber, and because the positive and negative pressure difference is large at this time, instantaneous pressure relief can be achieved, achieving faster and

[0122] Effective pressure regulation protection; at the same time, reducing the operating frequency of the positive / negative pressure pump and the first / second switch valve, which is beneficial to extend the life of the equipment and reduce the maintenance cost of the control system.

[0123] A double gas chamber balance control system uses an internal exchange solenoid valve and closes the solenoid valve. If there is residual gas in the double gas chamber, a first switch valve and a second switch valve are used respectively for pressure relief protection. Network multi-point monitoring and multi-point control are adopted to realize multi-point hierarchical control of the control system pressure, making the whole system control more accurate; the use frequency of the system components is reduced, and their life is extended; and the power consumption of the whole system is reduced.

[0124] A positive pressure pump and a negative pressure pump of a double air chamber balance control system use PID variable speed pumps to achieve the effect of slow start and slow stop. Under the premise of ensuring the normal function of the control system, the operating power of the positive pressure pump and the negative pressure pump is reduced, further reducing the energy consumption of the system.

[0125] The first switch valve and the second switch valve of a double gas chamber balance control system adopt PWM control valves. When a large amount of gas needs to pass, a long stroke is used; when a small amount of gas needs to pass, a short stroke is used. Under the premise of ensuring the normal function of the control system, the operating power of the first switch valve and the second switch valve is reduced, further reducing the energy consumption of the system.

[0126] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0127] Reference Figure 2 The present application also provides a dual air chamber balance control method, which is applied to any dual air chamber balance control system in the above embodiments, and the microcontroller performs the following steps:

[0128] Initialization, control the first switch valve and the second switch valve to open, control the positive pressure pump and the negative pressure pump to open, and obtain the pressure values ​​of the first pressure sensor and the second pressure sensor in real time;

[0129] When the pressure value fed back by the first pressure sensor reaches a preset first threshold value, the positive pressure pump is controlled to decelerate to a stop state, and the first switch valve is controlled to be closed; or when the pressure value fed back by the second pressure sensor reaches a preset second threshold value, the negative pressure pump is controlled to decelerate to a stop state, and the second switch valve is controlled to be closed.

[0130] In one embodiment, the microcontroller further performs the following steps:

[0131] Acquire the pressure values ​​fed back by the third pressure sensor and the fourth pressure sensor in real time;

[0132] When the pressure value fed back by the first pressure sensor exceeds the first threshold, determine whether the pressure value fed back by the third pressure sensor exceeds a preset third threshold; and when the pressure value fed back by the second pressure sensor exceeds the second threshold, determine whether the pressure value fed back by the fourth pressure sensor exceeds a preset fourth threshold;

[0133] When the pressure value fed back by the third pressure sensor exceeds the preset third threshold value and the pressure value fed back by the fourth pressure sensor exceeds the preset fourth threshold value, the solenoid valve is first controlled to open, and at this time the positive pressure pump and the negative pressure pump work normally;

[0134] Determine whether the pressure value fed back by the third pressure sensor reaches the first threshold, and determine whether the pressure value fed back by the fourth pressure sensor reaches the second threshold;

[0135] When the pressure value fed back by the third pressure sensor reaches the first threshold, or when the pressure value fed back by the fourth pressure sensor reaches the second threshold, the microcontroller controls the solenoid valve to close; wherein, the first threshold is less than the third threshold, and the fourth threshold is greater than the second threshold.

[0136] In one embodiment, the microcontroller further performs the following steps:

[0137] When the pressure value fed back by the third pressure sensor does not reach the first threshold and the pressure value fed back by the fourth pressure sensor does not reach the second threshold, determining whether the pressure value fed back by the third pressure sensor reaches the third threshold;

[0138] When the pressure value fed back by the third pressure sensor reaches the third threshold, the first switch valve is controlled to operate until the pressure value fed back by the third pressure sensor reaches the first threshold, the positive pressure pump is controlled to decelerate to a stop state, and the first switch valve is controlled to close.

[0139] In one embodiment, the microcontroller further performs the following steps:

[0140] When the pressure value fed back by the third pressure sensor does not reach the first threshold and the pressure value fed back by the fourth pressure sensor does not reach the second threshold, determining whether the pressure value fed back by the fourth pressure sensor reaches the fourth threshold;

[0141] When the pressure value fed back by the fourth pressure sensor reaches the fourth threshold value, the second switch valve is controlled to operate until the pressure value fed back by the fourth pressure sensor reaches the second threshold value, the negative pressure pump is controlled to decelerate to a stop state, and the second switch valve is controlled to close.

[0142] In one embodiment, the step of controlling the positive pressure pump to decelerate to a stop state comprises:

[0143] The real-time speed of the positive pressure pump is determined using a multi-contact network PID algorithm, and the formula is as follows:

[0144]

[0145] In the formula, is the real-time speed of the positive pressure pump; is the positive proportional coefficient of the PID controller; It is the deviation between the set value and the actual value, that is, the system deviation between the current pressure value and the expected pressure value; is the positive integral coefficient of the PID controller; is the positive differential coefficient of the PID controller.

[0146] adjust hour, If the design is too small, the system will have stability errors and fail to reach the target pressure; If the design is too large, it will cause system oscillation. After testing, the power curve of the positive pressure pump is fitted with the feedback curve of the first pressure sensor to verify Is the value size appropriate?

[0147] In order to eliminate the steady-state error, the integral coefficient is introduced. All historical system errors are added up and then multiplied by the integral constant. The formula is: =A (e(1)+e(2)+e(3)+e(4)+ ), A represents the positive pressure integral constant, e(1) represents the first error, e(2) represents the second error, and so on. When debugging the working curve, A is set according to the requirements, ranging from 0.1 to 0.9, to improve the steady-state error problem of the proportional term.

[0148] And, use It is used to reduce overshoot and oscillation, and to generate control quantity according to the rate of change of error to increase the stability and response speed of the system. The pressure in the positive pressure cabin is sensed by the first pressure sensor, and when the expected pressure is reached, the positive pressure pump is decelerated using the multi-contact network PID algorithm. The PID method is used to find the appropriate control coefficient K to control the start and stop timing and real-time speed of the positive pressure pump, which plays a role in slow start and stop and reducing the power consumption of the positive pressure pump.

[0149] The above formula is the regulating relationship between the pressure value in the positive pressure cabin and the speed of the positive pressure pump. Combined with the feedback from the positive pressure sensor, when the positive pressure reaches or exceeds the expected pressure, the positive pressure pump is controlled to stop.

[0150] In one embodiment, the step of controlling the negative pressure pump to decelerate to a stop state comprises:

[0151] The real-time speed of the negative pressure pump is determined using a multi-contact network PID algorithm, and the formula is as follows:

[0152]

[0153] In the formula, is the real-time speed of the negative pressure pump; is the negative proportional coefficient of the PID controller; It is the deviation between the set value and the actual value, that is, the system deviation between the current pressure value and the expected pressure value; is the negative integral coefficient of the PID controller; is the negative differential coefficient of the PID controller.

[0154] adjust hour, If the design is too small, the system will have stability errors and fail to reach the target pressure; If the design is too large, it will cause system oscillation. After testing, the power curve of the negative pressure pump is fitted with the feedback curve of the second pressure sensor to verify Is the value size appropriate?

[0155] In order to eliminate the steady-state error, the integral coefficient is introduced. All historical system errors are added up and then multiplied by the integral constant. The formula is: =B (e(1)+e(2)+e(3)+e(4)+ ), B represents the negative pressure integral constant, e(1) represents the first error, e(2) represents the second error, and so on. When debugging the working curve, B is set according to the requirements, ranging from 0.1 to 0.9, to improve the steady-state error problem of the proportional term.

[0156] And, use It is used to reduce overshoot and oscillation, and to generate control quantity according to the rate of change of error to increase the stability and response speed of the system.

[0157] The pressure in the negative pressure cabin is sensed by the second pressure sensor and when the expected pressure is reached, the multi-contact network PID algorithm is used to control the deceleration of the negative pressure pump. The PID method is used to find a suitable control coefficient K to control the start and stop timing and real-time speed of the negative pressure pump, which plays the role of slow start and stop, reducing the operating power consumption of the negative pressure pump, and further reducing the power consumption of the control system.

[0158] The above formula is the regulating relationship between the pressure value in the negative pressure cabin and the speed of the negative pressure pump. Combined with the feedback from the negative pressure sensor, when the negative pressure reaches or exceeds the expected pressure, the negative pressure pump is controlled to stop.

[0159] In addition, combined with the feedback from the positive / negative pressure sensors, when the positive / negative pressures both exceed the expected pressures, in addition to controlling the positive / negative pressure pumps to stop, the internal exchange solenoid valve is also controlled to open for internal exchange, thereby forming a closed internal exchange system.

[0160] PID controlled variable speed positive pressure pump and PID controlled variable speed negative pressure pump have the following advantages:

[0161] ‌1. Energy saving‌: Through PID control, the positive / negative pressure pump can be controlled to slow down at a preset speed when the expected pressure in the positive / negative pressure chamber is reached, avoiding high-power operation when demand is low, thereby reducing energy waste and achieving energy saving effects;

[0162] 2. Stability: PID control can ensure the stable operation of the positive / negative pressure pump. At the same time, by adjusting the real-time speed, it can protect the positive / negative pressure pump and prevent the motor from burning, thereby increasing the service life of the positive / negative pressure pump.

[0163] ‌3. Flexible‌: PID control can adapt to different pressure scene requirements. By accurately adjusting the real-time speed, it can adapt to different occasions and needs, and improve the efficiency and convenience of positive / negative pressure pumps;

[0164] ‌4. Reduce overshoot and oscillation‌: The differential link in PID control can predict the future state change trend of the system, suppress oscillation and overshoot, and improve the stability of the system;

[0165] 5. Eliminate steady-state error: The integral link in PID control can eliminate the steady-state error of the system and ensure that the system eventually stabilizes near the set value;

[0166] 6. Easy parameter setting: PID control reduces the mutual influence between parameters, and parameter setting is relatively easy, which is convenient for system debugging and maintenance;

[0167] ‌7. Strong adaptability‌: PID control has strong adaptability and can cope with some processes where PID control is not ideal.

[0168] In one embodiment, the initialization, when controlling the first switch valve to open, adopts a PWM control method, including the following steps:

[0169] Real-time detection of the current gas flow rate in the positive pressure cabin;

[0170] When the current gas flow rate in the positive pressure cabin is lower than the preset first gas flow rate, the first switch valve is controlled to be fully opened by using a long stroke;

[0171] When the current gas flow rate in the positive pressure cabin reaches the preset second gas volume, a short stroke is used to control the first switch valve to open 1 / 2 stroke or 1 / 4 stroke.

[0172] The gas flow rate can be reflected by measuring the gas concentration using an electrochemical gas sensor.

[0173] The preset first gas volume may be 30% of the expected value, that is, when the current gas flow rate in the positive pressure cabin is lower than 30% of the expected value, a long stroke is used to control the first switch valve to be fully opened.

[0174] The preset second gas volume is obtained after multiple debugging and corrections. The preset first gas volume can be 80% of the expected value. When the current gas flow in the positive pressure cabin reaches 80% of the expected value, a short stroke is used to control the first switch valve to open 1 / 2 stroke or 1 / 4 stroke.

[0175] The length of the switching stroke of the first switch valve is controlled by PWM. When a large amount of gas needs to pass through, the first switch valve uses a long stroke, and the valve is fully open at this time; when a small amount of gas needs to pass through, the first switch valve uses a short stroke, and the valve can be half-open or open 1 / 4 of the stroke, thereby achieving the purpose of reducing the operating power consumption of the first switch valve, and the power consumption of the system is further reduced.

[0176] In one embodiment, the initialization, when controlling the second switch valve to open, adopts a PWM control method, including the following steps:

[0177] Real-time detection of the current gas flow in the negative pressure cabin;

[0178] When the current gas flow rate in the negative pressure cabin is lower than the preset third gas flow rate, the second switch valve is controlled to be fully opened by using a long stroke;

[0179] When the current gas flow rate in the negative pressure chamber reaches the preset fourth gas volume, a short stroke is used to control the second switch valve to open 1 / 2 stroke or 1 / 4 stroke.

[0180] Among them, the preset third gas volume can be 30% of the expected value, that is, when the current gas flow in the negative pressure cabin is lower than 30% of the expected value, a long stroke is used to control the second switch valve to be fully opened.

[0181] The preset fourth gas volume can be 80% of the expected value. When the current gas flow in the negative pressure cabin reaches 80% of the expected value, a short stroke is used to control the second switch valve to open 1 / 2 stroke or 1 / 4 stroke.

[0182] The length of the switching stroke of the second switch valve is controlled by PWM. When a large amount of gas needs to pass through, the second switch valve uses a long stroke, and the valve is fully open at this time; when a small amount of gas needs to pass through, the second switch valve uses a short stroke, and the valve can be half-open or open 1 / 4 of the stroke, thereby achieving the purpose of reducing the operating power consumption of the first switch valve, and the power consumption of the system is further reduced.

[0183] The PWM controlled first switch valve and the PWM controlled second switch valve have the following advantages:

[0184] 1. Energy saving: By controlling the opening and closing time of the valve, PWM control can minimize unnecessary energy consumption, thereby reducing operating costs;

[0185] 2. Precise control: PWM technology can achieve precise control of the opening and closing time of the valve, thereby achieving precise control of the fluid flow and improving the stability and response speed of the system;

[0186] 3. Good stability: PWM control has high stability, which can ensure the stable operation of the valve, reduce the failure rate and extend the service life of the equipment;

[0187] 4. Wide range of applications: PWM control can be used with various types of valves, suitable for different application scenarios, and has a wide range of applicability.

[0188] The specific definition of a dual-air chamber balance control method can also be found in the above definition of a dual-air chamber balance control system, which will not be repeated here.

[0189] Each module in the above dual air chamber balance control method can be implemented in whole or in part by software, hardware, or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to each module.

[0190] In one embodiment, a computer device is provided, which may be a server. The computer device includes a processor, a memory, a network interface, and a database connected via a system bus. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the computer device is used to communicate with an external terminal via a network connection. When the computer program is executed by the processor, the following steps are implemented:

[0191] Initialization, control the first switch valve and the second switch valve to open, control the positive pressure pump and the negative pressure pump to open, and obtain the pressure values ​​of the first pressure sensor and the second pressure sensor in real time;

[0192] When the pressure value fed back by the first pressure sensor reaches a preset first threshold value, the positive pressure pump is controlled to decelerate to a stop state, and the first switch valve is controlled to be closed; or when the pressure value fed back by the second pressure sensor reaches a preset second threshold value, the negative pressure pump is controlled to decelerate to a stop state, and the second switch valve is controlled to be closed.

[0193] In one embodiment, a computer-readable storage medium is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the following steps are implemented:

[0194] Initialization, control the first switch valve and the second switch valve to open, control the positive pressure pump and the negative pressure pump to open, and obtain the pressure values ​​of the first pressure sensor and the second pressure sensor in real time;

[0195] When the pressure value fed back by the first pressure sensor reaches a preset first threshold value, the positive pressure pump is controlled to decelerate to a stop state, and the first switch valve is controlled to be closed; or when the pressure value fed back by the second pressure sensor reaches a preset second threshold value, the negative pressure pump is controlled to decelerate to a stop state, and the second switch valve is controlled to be closed.

[0196] In one embodiment, a computer program product is provided, the computer program product comprising a computer program, wherein when the computer program is executed by a processor, the following steps are implemented:

[0197] Initialization, control the first switch valve and the second switch valve to open, control the positive pressure pump and the negative pressure pump to open, and obtain the pressure values ​​of the first pressure sensor and the second pressure sensor in real time;

[0198] When the pressure value fed back by the first pressure sensor reaches a preset first threshold value, the positive pressure pump is controlled to decelerate to a stop state, and the first switch valve is controlled to be closed; or when the pressure value fed back by the second pressure sensor reaches a preset second threshold value, the negative pressure pump is controlled to decelerate to a stop state, and the second switch valve is controlled to be closed.

[0199] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. When the computer program is executed, it may include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in the present application may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0200] Those skilled in the art will clearly understand that for the sake of convenience and brevity of description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the system can be divided into different functional units or modules to complete all or part of the functions described above.

Claims

1. A dual air chamber balance control system, comprising a first pressure detection device for monitoring the pressure of a positive pressure chamber and a second pressure detection device for monitoring the pressure of a negative pressure chamber, respectively located at preset monitoring points, wherein the positive pressure chamber is connected to a first switch valve, and the negative pressure chamber is connected to a second switch valve, characterized in that: Also included is a microcontroller; The first switch valve and the second switch valve are electrically connected to the output end of the microcontroller respectively; The first pressure detection device is a first pressure sensor, which is fixedly installed at a first monitoring point of the positive pressure cabin, and the second pressure detection device is a second pressure sensor, which is fixedly installed at a second monitoring point of the negative pressure cabin, and the first pressure sensor and the second pressure sensor are electrically connected to the input end of the microcontroller respectively; wherein the first monitoring point is a position inside the positive pressure cabin close to the air inlet of the positive pressure pump; and the second monitoring point is a position inside the negative pressure cabin close to the air outlet of the negative pressure pump; The positive pressure cabin is also connected to a positive pressure pump for air intake, and the negative pressure cabin is also connected to a negative pressure pump for air discharge, and the positive pressure pump and the negative pressure pump are respectively electrically connected to the output end of the microcontroller; When the pressure value fed back by the first pressure sensor reaches a preset first threshold value, the microcontroller controls the positive pressure pump to decelerate to a stop state and controls the first switch valve to close; or when the pressure value fed back by the second pressure sensor reaches a preset second threshold value, the microcontroller controls the negative pressure pump to decelerate to a stop state and controls the second switch valve to close; A ventilation device is also provided between the positive pressure cabin and the negative pressure cabin; The ventilation device includes a third pressure sensor, a fourth pressure sensor and a solenoid valve, the third pressure sensor is fixedly installed at the third monitoring point of the positive pressure cabin, the fourth pressure sensor is fixedly installed at the fourth monitoring point of the negative pressure cabin, the solenoid valve is fixedly installed between the positive pressure cabin and the negative pressure cabin, the third pressure sensor and the fourth pressure sensor are electrically connected to the input end of the microcontroller respectively, and the solenoid valve is electrically connected to the output end of the microcontroller; When the pressure value fed back by the third pressure sensor exceeds a preset third threshold and the pressure value fed back by the fourth pressure sensor does not exceed a preset fourth threshold, the microcontroller first controls the solenoid valve to open until the pressure value fed back by the third pressure sensor reaches the first threshold, or when the pressure value fed back by the fourth pressure sensor reaches the second threshold, the microcontroller controls the solenoid valve to close; wherein, the first threshold is less than the third threshold, and the fourth threshold is less than the second threshold.

2. The dual air chamber balance control system according to claim 1, characterized in that: It also includes a third switch valve for controlling the output of the gas used in the positive pressure chamber and a fourth switch valve for controlling the intake of the gas used in the negative pressure chamber. The third switch valve and the fourth switch valve are electrically connected to the output end of the microcontroller respectively.

3. The dual air chamber balance control system according to claim 2, characterized in that: A first safety valve is also fixedly installed on the positive pressure cabin, and the first safety valve is electrically connected to the output end of the microcontroller; When the first switch valve fails, the microcontroller controls the first safety valve to open to replace the first switch valve.

4. The dual air chamber balance control system according to claim 3, characterized in that: A second safety valve is also fixedly installed on the negative pressure cabin, and the second safety valve is electrically connected to the output end of the microcontroller; When the second switch valve fails, the microcontroller controls the second safety valve to open to replace the second switch valve.

5. The dual air chamber balance control system according to claim 4, characterized in that: The positive pressure pump and the negative pressure pump both adopt PID controlled variable speed pumps.

6. The dual air chamber balance control system according to claim 5, characterized in that: The first switch valve and the second switch valve are both PWM controlled valves.

7. A double air chamber balance control method, characterized in that: The dual air chamber balance control system according to claim 6, wherein the microcontroller performs the following steps: Initialization, controlling the first switch valve and the second switch valve to open, controlling the positive pressure pump and the negative pressure pump to open, and obtaining the pressure values ​​of the first pressure sensor and the second pressure sensor in real time; When the pressure value fed back by the first pressure sensor reaches a preset first threshold, the positive pressure pump is controlled to decelerate to a stop state, and the first switch valve is controlled to be closed; or when the pressure value fed back by the second pressure sensor reaches a preset second threshold, the negative pressure pump is controlled to decelerate to a stop state, and the second switch valve is controlled to be closed; The microcontroller also performs the following steps, Acquire the pressure values ​​fed back by the third pressure sensor and the fourth pressure sensor in real time; When the pressure value fed back by the first pressure sensor exceeds the first threshold, determining whether the pressure value fed back by the third pressure sensor exceeds a preset third threshold; and, when the pressure value fed back by the second pressure sensor does not exceed the second threshold, determining whether the pressure value fed back by the fourth pressure sensor exceeds a preset fourth threshold; When the pressure value fed back by the third pressure sensor exceeds the preset third threshold value and the pressure value fed back by the fourth pressure sensor does not exceed the preset fourth threshold value, the solenoid valve is first controlled to open, and at this time the positive pressure pump and the negative pressure pump work normally; Determine whether the pressure value fed back by the third pressure sensor reaches the first threshold, and determine whether the pressure value fed back by the fourth pressure sensor reaches the second threshold; When the pressure value fed back by the third pressure sensor reaches the first threshold, or when the pressure value fed back by the fourth pressure sensor reaches the second threshold, the microcontroller controls the solenoid valve to close; wherein, the first threshold is less than the third threshold, and the fourth threshold is less than the second threshold.

8. The double air chamber balance control method according to claim 7, characterized in that: The microcontroller also performs the following steps, When the pressure value fed back by the third pressure sensor does not reach the first threshold and the pressure value fed back by the fourth pressure sensor does not reach the second threshold, determining whether the pressure value fed back by the third pressure sensor reaches the third threshold; When the pressure value fed back by the third pressure sensor reaches the third threshold, the first switch valve is controlled to operate until the pressure value fed back by the third pressure sensor reaches the first threshold, the positive pressure pump is controlled to decelerate to a stop state, and the first switch valve is controlled to close.

9. The double air chamber balance control method according to claim 8, characterized in that: The microcontroller also performs the following steps, When the pressure value fed back by the third pressure sensor does not reach the first threshold and the pressure value fed back by the fourth pressure sensor does not reach the second threshold, determining whether the pressure value fed back by the fourth pressure sensor reaches the fourth threshold; When the pressure value fed back by the fourth pressure sensor reaches the fourth threshold value, the second switch valve is controlled to operate until the pressure value fed back by the fourth pressure sensor reaches the second threshold value, the negative pressure pump is controlled to decelerate to a stop state, and the second switch valve is controlled to close.

10. The double air chamber balance control method according to claim 7, characterized in that: The step of controlling the positive pressure pump to decelerate to a stop state comprises: The real-time speed of the positive pressure pump is determined using a multi-contact network PID algorithm, and the formula is as follows: In the formula, is the real-time speed of the positive pressure pump; is the positive proportional coefficient of the PID controller; It is the deviation between the set value and the actual value, that is, the system deviation between the current pressure value and the expected pressure value; is the positive integral coefficient of the PID controller; is the positive differential coefficient of the PID controller.

11. The double air chamber balance control method according to claim 7, characterized in that: The step of controlling the negative pressure pump to decelerate to a stop state comprises: The real-time speed of the negative pressure pump is determined using a multi-contact network PID algorithm, and the formula is as follows: In the formula, is the real-time speed of the negative pressure pump; is the negative proportional coefficient of the PID controller; It is the deviation between the set value and the actual value, that is, the system deviation between the current pressure value and the expected pressure value; is the negative integral coefficient of the PID controller; is the negative differential coefficient of the PID controller.

12. The double air chamber balance control method according to claim 7, characterized in that: The initialization, when controlling the first switch valve to open, adopts a PWM control method, including the following steps: Real-time detection of the current gas flow rate in the positive pressure cabin; When the current gas flow rate in the positive pressure cabin is lower than the preset first gas flow rate, the first switch valve is controlled to be fully opened by using a long stroke; When the current gas flow rate in the positive pressure cabin reaches the preset second gas volume, a short stroke is used to control the first switch valve to open 1 / 2 stroke or 1 / 4 stroke.

13. The double air chamber balance control method according to claim 7, characterized in that: The initialization, when controlling the second switch valve to open, adopts a PWM control method, including the following steps: Real-time detection of the current gas flow in the negative pressure cabin; When the current gas flow rate in the negative pressure cabin is lower than the preset third gas flow rate, the second switch valve is controlled to be fully opened by using a long stroke; When the current gas flow rate in the negative pressure chamber reaches the preset fourth gas volume, a short stroke is used to control the second switch valve to open 1 / 2 stroke or 1 / 4 stroke.

14. The double air chamber balance control method according to claim 7, characterized in that: The value range of the third threshold is (600 mmHg, 800 mmHg).

15. The double air chamber balance control method according to claim 9, characterized in that: The value range of the fourth threshold is (-700 mmHg, -500 mmHg).

16. A computer device, characterized in that: The method comprises a memory, a processor and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the method according to any one of claims 7 to 15.

17. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method according to any one of claims 7 to 15 are implemented.

18. A computer program product, characterized in that The invention comprises a computer program, which implements the steps of the method according to any one of claims 7 to 15 when executed by a processor.

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