A water pump control system, a water pump control method, and a computer device

Abstract

The embodiment of the application relates to the computer technical field, and discloses a water pump control system, a water pump control method and computer equipment, which comprise a water pump, a controller, a first sensor and a second sensor, the water pump comprises a water pump built-in control module, the water pump built-in control module acquires liquid pressure information collected by the first sensor and sends the liquid pressure information to the controller, the controller acquires gas pressure information collected by the second sensor, and according to the liquid pressure information and the gas pressure information, determines liquid level information of liquid in a water container, and then according to a liquid level difference between a liquid level corresponding to the liquid level information and a preset bottom line liquid level and a pre-determined backflow liquid level difference, determines a target operation power, so that the water pump built-in control module controls the water pump to operate according to the target operation power, the water pump can be matched with the target operation power matched with the current liquid level information, and accurate control of the water pump is realized.

Description

Technical Field

[0001] This application relates to the field of computer technology, specifically to a water pump control system, a water pump control method, and a computer device. Background Technology

[0002] Water pumps enable the continuous transfer of liquid from a water container to an external source, and they are widely used in smart home appliances, industrial water supply, and other fields. The liquid level information within the water container is the core basis for water pump control, and its detection accuracy is crucial.

[0003] In related technologies, liquid level detection can be achieved using capacitive or resistive probes. This method determines the presence of liquid in a water container by observing changes in the electrical signal when the probe contacts and leaves the liquid. However, this method can only identify the liquid level at a preset point, meaning it can only identify the presence of liquid at a fixed point and cannot quantify the specific height of the liquid in the water container. Therefore, it is difficult to provide a reasonable basis for water pump control, resulting in low accuracy of water pump control. Summary of the Invention

[0004] In view of the above problems, embodiments of this application provide a water pump control system, a water pump control method, and a computer device to solve the problem of low accuracy in water pump control in related technologies.

[0005] According to a first aspect of the embodiments of this application, a water pump control system is provided, including: a water pump, a controller, a first sensor, and a second sensor;

[0006] The water pump includes a built-in control module that is communicatively connected to a first sensor. The water pump is used to draw liquid from a water container. The controller is communicatively connected to a second sensor.

[0007] The water pump has a built-in control module, which is used to acquire the liquid pressure information at the bottom of the water container collected by the first sensor and send the liquid pressure information to the controller.

[0008] The controller is used to acquire gas pressure information of the external environment of the water container collected by the second sensor; determine the liquid level information of the liquid in the water container based on the liquid pressure information and the gas pressure information; determine the target operating power based on the liquid level difference between the liquid level corresponding to the liquid level information and the preset bottom liquid level and the predetermined backflow liquid level difference, and send the target command carrying the target operating power to the water pump built-in control module.

[0009] The built-in control module of the water pump is also used to control the water pump to operate at the target operating power in response to the target command.

[0010] In some embodiments of this application, the system further includes: a wireless power supply transmitting module and a wireless power supply receiving module. The wireless power supply receiving module is disposed on the water pump and is electrically connected to the water pump. The water pump is disposed on the inner bottom of the water container, and the wireless power supply transmitting module is disposed on the outer bottom of the water container. The wireless power supply transmitting module and the wireless power supply receiving module are vertically aligned. The wireless power supply transmitting module is electrically connected to the controller, and the controller is disposed outside the water container.

[0011] The controller is also used to receive device start commands sent by the user;

[0012] In response to the device start command, the wireless power supply transmitter module and the wireless power supply receiver module are controlled to form a magnetic field coupling connection to establish a wireless power supply link. The wireless power supply link is used to carry the power transmission and data transmission between the controller and the water pump.

[0013] Power is transmitted to the water pump and the first sensor via a wireless power supply link.

[0014] In some embodiments of this application, the controller is specifically used to determine the pressure difference between the liquid pressure corresponding to the liquid pressure information and the gas pressure corresponding to the gas pressure information;

[0015] The liquid level information in the water container is determined based on the pressure difference, the preset liquid density parameter, and the preset gravitational acceleration parameter.

[0016] In some embodiments of this application, the controller is also configured to send a start command to the water pump's built-in control module;

[0017] The water pump has a built-in control module, which responds to the start command and controls the water pump to perform the pumping operation corresponding to the start command until the liquid level in the water container reaches the preset bottom level. Then, the pumping operation stops and a feedback command is sent to the controller.

[0018] The controller is also used to, in response to a feedback command, determine the return liquid level information in the water container after the liquid in the transmission pipe has returned to the container after a preset waiting time, and determine the liquid level difference between the liquid level corresponding to the return liquid level information and the preset bottom liquid level as the return liquid level difference. The transmission pipe is used to transmit the liquid drawn by the water pump from the water container.

[0019] In some embodiments of this application, the controller is also configured to send a start command to the water pump's built-in control module;

[0020] The water pump has a built-in control module, which responds to the start command and controls the water pump to perform the pumping operation corresponding to the start command until the liquid level in the water container reaches the preset bottom level. Then, the pumping operation stops and a feedback command is sent to the controller.

[0021] The controller is also used to, in response to a feedback command, after a preset waiting time, acquire the return liquid volume information after the liquid in the transmission pipe has returned, and determine the return liquid level difference based on the return liquid volume information and the size information of the water container. The transmission pipe is used to transmit the liquid drawn by the water pump from the water container.

[0022] In some embodiments of this application, the controller is specifically used to determine a level difference threshold based on the reflux level difference;

[0023] When the liquid level difference is greater than the return liquid level difference, the target operating power is determined as the first target operating power;

[0024] If the liquid level difference is less than or equal to the return liquid level difference and the liquid level difference is greater than the liquid level difference threshold, the target operating power is determined as the second target operating power;

[0025] When the liquid level difference is less than or equal to the liquid level difference threshold, the target operating power is determined as the third target operating power; wherein, the first target operating power is greater than the second target operating power, the second target operating power is not zero, and the third target operating power is zero.

[0026] In some embodiments of this application, the controller is further configured to, when the liquid level difference is less than or equal to a liquid level difference threshold, after the liquid in the transmission pipe has returned to its original position after a preset waiting time, redetermine the target operating power based on the liquid level difference between the liquid level corresponding to the returned liquid level information and the preset bottom line liquid level, as well as the return liquid level difference. The transmission pipe is used to transmit the liquid drawn by the water pump from the water container.

[0027] According to a second aspect of the embodiments of this application, a water pump control method is provided, comprising:

[0028] The system receives liquid pressure information sent by the water pump's built-in control module. The liquid pressure information is the liquid pressure information at the bottom of the water container collected by the first sensor, which is communicatively connected to the water pump's built-in control module.

[0029] The gas pressure information of the external environment of the water container is acquired by the second sensor, and the liquid level information of the liquid inside the water container is determined based on the liquid pressure information and the gas pressure information.

[0030] The target operating power is determined based on the liquid level difference between the liquid level corresponding to the liquid level information and the preset bottom liquid level, as well as the predetermined return liquid level difference.

[0031] Send a target command carrying the target operating power to the built-in control module of the water pump, so that the built-in control module of the water pump responds to the target command and controls the water pump to operate at the target operating power.

[0032] According to a third aspect of the embodiments of this application, a computer device is provided, the computer device including a processor and a memory, the memory being used to store at least one program, the at least one program being loaded by the processor and executed by the above-described water pump control method.

[0033] According to a fourth aspect of the embodiments of this application, a computer-readable storage medium is provided, which stores at least one program, which is loaded and executed by a processor to implement the above-described water pump control method.

[0034] Therefore, in the water pump control system of this embodiment, the controller can receive liquid pressure information at the pump's location sent by the pump's built-in control module. Based on this liquid pressure information and the gas pressure information collected by the second sensor, the controller determines the liquid level information in the water container. Then, based on the liquid level difference between the liquid level corresponding to this information and the preset baseline liquid level, as well as a predetermined backflow liquid level difference, the controller determines the target operating power to control the pump to operate at the target operating power. Thus, the above-mentioned water pump control system can accurately determine the liquid level information in the water container and control the pump based on this information. For different liquid level information in the water container, it can match the target operating power to the current liquid level information, preventing the pump from continuously operating at a high power, which could lead to the depletion of liquid in the water container and mechanical wear due to dry burning. This achieves precise control of the water pump.

[0035] In addition, by introducing the backflow level difference in the process of controlling the water pump based on the level information, the target operating power is determined by comparing the level difference between the liquid level corresponding to the level information and the preset bottom level with the backflow level difference. This can eliminate the interference of level fluctuations caused by the backflow of residual liquid in the transmission pipe after the water pump stops on the control decision, and avoid the controller misjudging the actual liquid level in the water container due to the backflow of residual liquid in the transmission pipe, thus further improving the accuracy of water pump control. Attached Figure Description

[0036] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0037] Figure 1 This is a schematic diagram of a water pump control system provided in an embodiment of this application;

[0038] Figure 2 A schematic diagram of the structure of a wireless power supply transmitting module and a wireless power supply receiving module in a water pump control system provided in this application embodiment;

[0039] Figure 3A schematic diagram of the overall control flow of the controller in a water pump control system provided in an embodiment of this application;

[0040] Figure 4 A schematic flowchart of a water pump control method provided in an embodiment of this application;

[0041] Figure 5 This is a schematic diagram of the structure of a water pump control device provided in an embodiment of this application;

[0042] Figure 6 This is a schematic diagram of the hardware structure of a computer device provided in an embodiment of this application. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0044] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application.

[0045] In this application, the terms "first," "second," etc., are used to distinguish identical or similar items that have essentially the same function. It should be understood that there is no logical or temporal dependency between "first," "second," and "nth," nor does it limit the quantity or execution order. It should also be understood that although the following description uses the terms "first," "second," etc., to describe various objects, these objects should not be limited by the terms.

[0046] These terms are simply used to distinguish one object from another. For example, without departing from the various examples, a first action can be called a second action, and similarly, a second action can be called a first action. Both the first and second actions can be actions, and in some cases, they can be separate and distinct actions.

[0047] "At least one" refers to one or more actions. For example, at least one action can be one action, two actions, three actions, or any integer number of actions greater than or equal to one. "Multiple" refers to two or more actions. For example, multiple actions can be two actions, three actions, or any integer number of actions greater than or equal to two.

[0048] Water pumps enable the continuous transfer of liquid from a water container to an external source, and they are widely used in smart home appliances, industrial water supply, and other fields. The liquid level information within the water container is the core basis for water pump control, and its detection accuracy is crucial.

[0049] In related technologies, liquid level detection can be achieved using capacitive or resistive probes. This method determines the presence of liquid in a water container by observing changes in the electrical signal when the probe contacts and leaves the liquid. However, this method can only identify the liquid level at a preset point, meaning it can only identify the presence of liquid at a fixed point and cannot quantify the specific height of the liquid in the water container. Therefore, it is difficult to provide a reasonable basis for water pump control, resulting in low accuracy of water pump control.

[0050] Water pumps are typically installed inside the water container of devices such as humidifiers and water purifiers to extract liquid. Controllers that control the pump's start and stop and adjust its operating parameters are usually installed outside the water container. In related technologies, the pump and controller are often connected by a wired connection, which is a cumbersome process. Furthermore, removing the pump when cleaning the water container requires disconnecting the wires, making the operation quite inconvenient.

[0051] To address the technical problems mentioned above, this application provides a water pump control system that can match the target operating power of the water pump to the current liquid level information based on different liquid level information in the water container, thereby achieving precise control of the water pump. Furthermore, by introducing a backflow level difference during the water pump control process based on liquid level information, the system eliminates the interference of liquid level fluctuations caused by the backflow of residual liquid in the transmission pipe after the water pump stops, thus avoiding misjudgment of the actual liquid level in the water container by the controller due to the backflow of residual liquid in the transmission pipe and further improving the accuracy of water pump control.

[0052] The above-mentioned water pump control system is as follows: Figure 1 As shown, Figure 1 This is a schematic diagram of a water pump control system provided in an embodiment of this application.

[0053] like Figure 1 As shown, the water pump control system 100 in this embodiment may include a water pump 101, a controller 102, a first sensor 105, and a second sensor 107.

[0054] The water pump control system 100 can be applied to devices that extract liquid, such as humidifiers, water purifiers, and water dispensers. In the water pump control system 100, the water pump 101 can be used to extract liquid from the water container 103. For example, a transmission pipe 104 can be connected to the water pump 101, and the transmission pipe 104 can be used to transmit the liquid extracted by the water pump 101 from the water container 103.

[0055] The water pump 101 may include a built-in control module 106. The built-in control module 106 can receive control commands sent by the controller 102 to control the start-up, shutdown, and power adjustment of the water pump 101 based on the control commands. The built-in control module 106 is communicatively connected to a first sensor 105. The first sensor 105 can collect liquid pressure information at the bottom of the water container 103. The first sensor 105 is not limited to a piezoresistive pressure sensor, a ceramic capacitive pressure sensor, or a miniature piezoelectric pressure sensor. The first sensor 105 can send the collected liquid pressure information to the built-in control module 106 through this communication connection.

[0056] In some embodiments of this application, the first sensor 105 can be disposed on the water pump 101, which can be disposed on the inner bottom of the water container 103. The first sensor 105 can collect the liquid pressure information at the location of the water pump 101 and send it as the liquid pressure information at the bottom of the water container 103 to the water pump built-in control module 106. For example, the communication connection between the water pump built-in control module 106 and the first sensor 105 can be realized by an integrated on-board connection, that is, the water pump built-in control module 106 and the first sensor 105 can be integrated on the same circuit board. Alternatively, the water pump built-in control module 106 and the first sensor 105 can be integrated on different circuit boards, and the communication between the water pump built-in control module 106 and the first sensor 105 can be realized through the electrical connection between the two circuit boards.

[0057] In some other embodiments of this application, the water pump 101 may also be disposed outside the water container 103, and the first sensor 105 may be disposed at the bottom of the water container 103 to collect liquid pressure information at the bottom of the water container 103. The first sensor 105 and the water pump built-in control module 106 may be electrically connected through an external wire to send the liquid pressure information to the water pump built-in control module 106 through the electrical connection.

[0058] The controller 102 can be the main control unit of a device such as a humidifier, water purifier, or water dispenser. The controller 102 can be located outside the water container 103 to avoid contact with the liquid inside. The controller 102 is communicatively connected to a second sensor 107, which collects gas pressure information from the external environment of the water container 103. For example, the communication connection between the controller 102 and the second sensor 107 can be achieved using an integrated in-board connection, meaning the controller 102 and the second sensor 107 can be integrated on the same circuit board. Alternatively, the controller 102 and the second sensor 107 can be integrated on different circuit boards, and the communication connection between the controller 102 and the second sensor 107 can be achieved using a discrete external connection through the electrical connection between these two circuit boards. In other words, the controller 102 and the second sensor 107 are arranged separately, and signal transmission between the controller 102 and the second sensor 107 is achieved through wires.

[0059] The controller 102 can determine the target operating power of the water pump 101 based on the liquid level information in the water container 103, so that the water pump 101 can operate at the target operating power, thereby realizing the control of the water pump 101.

[0060] Specifically, the water pump's built-in control module 106 can first acquire the liquid pressure information at the bottom of the water container 103 collected by the first sensor 105, and send this liquid pressure information to the controller 102. The controller 102 can acquire the gas pressure information of the external environment of the water container 103 collected by the second sensor 107, and then determine the liquid level information inside the water container 103 based on the liquid pressure information and the gas pressure information.

[0061] After determining the liquid level information in the water outlet container 103, the controller 102 can determine the liquid level difference between the corresponding liquid level and the preset bottom line liquid level, and determine the target operating power based on this liquid level difference and the preset return liquid level difference. The preset bottom line liquid level refers to the lowest liquid level threshold that the water container 103 is not allowed to fall below. For example, a user can set the preset bottom line liquid level according to their own needs. Alternatively, the preset bottom line liquid level can be a default value preset at the factory. The return liquid level difference refers to the liquid level difference caused by the return of residual liquid in the transmission pipe 104 to the water container after the water pump 101 stops drawing liquid from the water container, resulting in a rise in the liquid level in the water container.

[0062] Specifically, the controller 102 can determine the target operating power by comparing the liquid level difference with a predetermined return liquid level difference, and send a target command carrying the target operating power to the water pump built-in control module 106. Then, the water pump built-in control module 106 can respond to the target command and control the water pump 101 to operate at the target operating power.

[0063] For example, the water pump 101 can be set with multiple operating levels. Different operating levels correspond to different operating power and speed. The higher the operating level, the greater the operating power and speed of the water pump 101. The controller 102 can determine the matching operating level by comparing the magnitude of the liquid level difference with the predetermined return liquid level difference, and control the water pump 101 to run at the corresponding speed according to the target operating power corresponding to the operating level.

[0064] Therefore, by introducing a backflow level difference during the control of the water pump 101 based on the liquid level information in the water container 103, the interference of liquid level fluctuations caused by the backflow of residual liquid in the transmission pipe 104 after the water pump 101 stops on the control decision can be eliminated. This avoids the controller 102 misjudging the actual liquid level in the water container 103 due to the backflow of residual liquid in the transmission pipe 104. For example, if the liquid level in the water container 103 is low, triggering the water pump 101 to stop, the liquid level in the water container 103 will rise after the backflow of residual liquid in the transmission pipe 104. This will cause the controller 102 to misjudge that the liquid level in the water container 103 has recovered sufficiently and control the water pump 101 to start again, which will eventually lead to the problem of frequent start-stop of the water pump 101 and cause mechanical wear of the water pump 101. In this embodiment, a backflow level difference can be introduced during the control of the water pump 101 based on the liquid level information in the water container 103, which avoids the aforementioned situation and improves the accuracy of the water pump 101 control.

[0065] Therefore, in the water pump control system of this embodiment, the controller can receive liquid pressure information at the bottom of the water container sent by the water pump's built-in control module. Based on this liquid pressure information and the gas pressure information collected by the second sensor, the controller determines the liquid level information in the water container. Then, based on the liquid level difference between the liquid level corresponding to this information and the preset bottom line liquid level, as well as the predetermined backflow liquid level difference, the controller determines the target operating power to control the water pump to operate at the target operating power. It is evident that the above-mentioned water pump control system can accurately determine the liquid level information in the water container and control the water pump based on this information. For different liquid level information in the water container, it can match the target operating power to the current liquid level information, preventing the water pump from continuously operating at a high power, which could lead to the depletion of liquid in the water container and thus dry burning and mechanical wear. This achieves precise control of the water pump.

[0066] In addition, by introducing the backflow level difference in the process of controlling the water pump based on the level information, the target operating power is determined by comparing the level difference between the liquid level corresponding to the level information and the preset bottom level with the backflow level difference. This can eliminate the interference of level fluctuations caused by the backflow of residual liquid in the transmission pipe after the water pump stops on the control decision, and avoid the controller misjudging the actual liquid level in the water container due to the backflow of residual liquid in the transmission pipe, thus further improving the accuracy of water pump control.

[0067] In some embodiments of this application, the water pump 101 at the bottom of the inner side of the water container 103 and the controller 102 outside the water container 103 can establish a connection through a wireless power supply link. The wireless power supply link can be constructed based on magnetic induction coupling or carrier communication technology, integrating wireless power transmission and wireless data communication functions, thereby realizing the same link transmission of power and data between the water pump 101 and the controller 102.

[0068] Specifically, the water pump control system may also include: a wireless power supply transmitting module 108 and a wireless power supply receiving module 109. The wireless power supply transmitting module 108 may have a built-in transmitting coil. After a high-frequency alternating current is applied to the transmitting coil, a high-frequency alternating magnetic field is generated. The wireless power supply receiving module 109 may have a built-in receiving coil. The transmitting coil and the receiving coil are aligned vertically and vertically. Electrical energy is generated through magnetic field coupling to establish a wireless power supply link between the water pump 101 and the controller 102.

[0069] The wireless power supply transmitter module 108 and the wireless power supply receiver module 109 are as follows: Figure 2 As shown, Figure 2 This is a schematic diagram of the structure of a wireless power supply transmitter module and a wireless power supply receiver module in a water pump control system provided in an embodiment of this application.

[0070] like Figure 2 As shown, a water pump 101 can be installed at the inner bottom of the water container 103, and a wireless power supply receiver module 109 can be installed on the water pump 101. The wireless power supply receiver module 109 is electrically connected to the water pump 101, and transmits coupled-induced electrical energy to the water pump 101 through this electrical connection. A wireless power supply transmitter module 108 can be installed at the outer bottom of the water container 103. The wireless power supply transmitter module 108 is electrically connected to the controller 102, and obtains electrical energy from the power supply unit on the controller 102 through this electrical connection to drive the transmitting coil to generate a high-frequency alternating magnetic field, providing a magnetic field for establishing a wireless power supply link. Furthermore, the wireless power supply transmitter module 108 and the wireless power supply receiver module 109 are vertically aligned, thereby improving the magnetic field coupling strength and ensuring the stability of power supply and data transmission.

[0071] When the user starts the device, the controller 102 can receive the device start command sent by the user and, in response to the device start command, control the wireless power supply transmitter module 108 and the wireless power supply receiver module 109 to form a magnetic field coupling connection, thereby establishing a wireless power supply link. This wireless power supply link can be used to carry the transmission of electrical energy and data between the controller 102 and the water pump 101. Furthermore, the controller 102 can transmit electrical energy to the water pump 101 and the first sensor 105 through the wireless power supply link.

[0072] Furthermore, the communication connection between the controller 102 and the second sensor 107 can be achieved through an electrical connection. When the controller 102 is started, it can provide power to the second sensor 107 through this electrical connection. In addition, the second sensor 107 can send the gas pressure information of the external environment of the water container 103 collected to the controller 102 through this electrical connection.

[0073] Therefore, the use of the aforementioned wireless power supply link to achieve power transmission and data transmission between the water pump 101 and the controller 102 simplifies the hardware connection structure and solves the drawbacks of using wired connections in scenarios such as cleaning and installing the water container 103. In some embodiments of this application, the controller 102 can determine the liquid level information in the water container 103 based on the gas pressure information collected by the second sensor 107 and the liquid pressure information sent by the water pump's built-in control module 106. Specifically, the controller 102 can first determine the pressure difference between the liquid pressure corresponding to the liquid pressure information and the gas pressure corresponding to the gas pressure information, and then determine the liquid level information in the water container 103 based on this pressure difference, a preset liquid density parameter, and a preset gravitational acceleration parameter, as shown in the following formula:

[0074]

[0075] in, The pressure of the liquid mentioned above. The above gas pressure, This refers to the liquid density parameter, such as the liquid density parameter of water. These are parameters related to gravitational acceleration. This provides information on the liquid level inside water container 103.

[0076] In this embodiment, the liquid in the water container 103 can be drinking water concentrate, industrial circulating water, pharmaceutical aqueous solution, etc., and no specific limitation is made here.

[0077] In some embodiments of this application, in order to eliminate the interference of different initial liquid levels on the measurement of reflux liquid level difference and avoid measurement deviation caused by the nonlinear characteristics of the cross-sectional area of ​​the water container 103, the liquid in the water container 103 can be drawn to a preset bottom line liquid level to measure the reflux liquid level difference, thereby eliminating the interference of different initial liquid levels, avoiding the deviation caused by the nonlinearity of the cross-sectional area of ​​the water container 103, and thus obtaining an accurate reflux liquid level difference.

[0078] Specifically, the controller 102 can send a start command to the water pump's built-in control module 106. In response to the start command, the water pump's built-in control module 106 can control the water pump 101 to perform the extraction operation corresponding to the start command until the liquid level in the water container 103 reaches the preset bottom line level. At this point, the extraction operation stops, and a feedback command is sent to the controller 102. During this process, the controller 102 can calculate the liquid level in the water container 103 in real time. When the liquid level in the water container 103 reaches the preset bottom line level, the controller 102 sends a stop command to the water pump's built-in control module 106. In response to the stop command, the water pump's built-in control module 106 controls the water pump 101 to stop and sends a feedback command to the controller 102, indicating that the extraction operation of the water pump 101 has stopped.

[0079] In response to a feedback command, the controller 102 determines the reflux liquid level information in the water container 103 after the liquid reflux in the transmission pipe 104 has been completed, according to a preset waiting time. The liquid level corresponding to the reflux liquid level information is the liquid level in the water container 103 after the liquid reflux in the transmission pipe 104 has been completed. Furthermore, the liquid level difference between the liquid level corresponding to the reflux liquid level information and the preset baseline liquid level can be determined as the reflux liquid level difference. The relevant technical details of the controller 102 determining the liquid level in the water container 103 have been described in detail above and will not be repeated here.

[0080] In some embodiments of this application, the reflux liquid level difference can also be determined based on the reflux liquid volume information and the size information of the water container 103. Specifically, the controller 102 can send a start command to the water pump built-in control module 106. In response to the start command, the water pump built-in control module 106 controls the water pump 101 to perform the extraction operation corresponding to the start command until the liquid level corresponding to the liquid level information in the water container 103 reaches the preset bottom line liquid level, at which point the extraction operation stops and a feedback command is sent to the controller 102. The controller 102 is also used to, in response to the feedback command, after the liquid reflux in the transmission pipe 104 has been completed according to a preset waiting time, acquire the reflux liquid volume information, which refers to the volume of liquid remaining in the transmission pipe 104 after the water pump 101 stops. For example, a liquid flow sensor can be installed on the transmission pipe 104, which can collect the reflux liquid volume information. For another example, during the device initialization phase, the reflux liquid volume information can be measured in advance and stored in the storage unit of the controller 102 in advance.

[0081] Furthermore, the controller 102 can determine the reflux liquid level difference based on the reflux liquid volume information and the size information of the water container 103. Specifically, it can determine the reflux liquid level difference based on the reflux liquid volume corresponding to the reflux liquid volume information and the cross-sectional area of ​​the water container 103, as shown in the following formula:

[0082]

[0083] in, The aforementioned reflux liquid level difference, The reflux volume corresponds to the reflux volume information. Let be the cross-sectional area of ​​water container 103.

[0084] In some embodiments of this application, the controller 102 can determine the target operating power by comparing the liquid level difference with a predetermined return liquid level difference. Specifically, it can first determine a liquid level difference threshold based on the return liquid level difference, and then determine the target operating power based on the relationship between the liquid level difference, the return liquid level difference, and the liquid level difference threshold. The liquid level difference threshold is the critical value for stopping the water pump 101. If the liquid level difference is less than the threshold, that is, the liquid level difference between the current liquid level in the water container 103 and the preset bottom line liquid level has reached the critical value, the controller 102 can determine that if the water pump 101 continues to operate, there is a risk of dry running. Therefore, it is necessary to stop the water pump 101 to effectively avoid mechanical wear and potential malfunctions caused by the water pump 101 running dry.

[0085] The specific liquid level difference threshold can be calculated using the following formula:

[0086]

[0087] in, The threshold value for liquid level difference. The value of 0.3 represents the reflux level difference. This is an example value provided in this application. In practical applications, the ratio between the level difference threshold and the reflux level difference can be determined based on actual needs to determine the level difference threshold.

[0088] Specifically, the water pump 101 can be set with three operating gears, namely the first operating gear, the second operating gear and the third operating gear. The first operating gear is higher than the second operating gear, the speed corresponding to the first operating gear is higher than the speed corresponding to the second operating gear, and the third operating gear is the stop gear.

[0089] If the liquid level difference between the liquid level information in the water container 103 and the preset bottom line liquid level is greater than the return liquid level difference, then the operating gear of the water pump 101 can be determined as the first operating gear, that is, the target operating power is determined as the first target operating power, so that the water pump built-in control module 106 controls the water pump 101 to operate according to the first target operating power and operate at the corresponding speed.

[0090] If the liquid level difference between the liquid level information in water container 103 and the preset bottom line liquid level is less than or equal to the return liquid level difference and the liquid level difference is greater than the liquid level difference threshold, then the operating mode of water pump 101 can be determined as the second operating mode, that is, the target operating power is determined as the second target operating power, so that the water pump built-in control module 106 controls water pump 101 to operate according to the second target operating power and at the corresponding speed. The first target operating power is greater than the second target operating power. For example, the first target operating power can be 10W and the second target operating power can be 5W.

[0091] That is, if the above liquid level difference is greater than the return liquid level difference, the controller 102 determines that the liquid level in the water container 103 is high and the liquid is sufficient, and can control the water pump 101 to operate at a higher first target operating power. In addition, the return of residual liquid in the transmission pipe 104 has little impact on the liquid level change and will not interfere with the control decision. If the aforementioned liquid level difference is less than or equal to the return liquid level difference and the liquid level difference is greater than the liquid level difference threshold, that is, the controller 102 determines that the liquid level in the water container 103 is close to the preset bottom line liquid level. The liquid level in the water container 103 is low, and the impact of the return of the residual liquid in the transmission pipe 104 on the liquid level change will be significantly increased. If the water pump 101 continues to be controlled to operate at a larger first target operating power, it may trigger the water pump 101 to stop operating. After the residual liquid in the transmission pipe 104 returns, it will interfere with the control decision. The controller 102 may misjudge that the liquid level in the water container 103 has recovered sufficiently and control the water pump 101 to start running again, causing the water pump 101 to start and stop frequently, which will aggravate the mechanical wear of the water pump 101. Therefore, the water pump 101 can be controlled to operate at a smaller second target operating power to avoid the aforementioned problems.

[0092] If the liquid level difference between the liquid level information in water container 103 and the preset bottom line liquid level is less than or equal to the liquid level difference threshold, that is, the liquid level difference between the liquid level in water container 103 and the preset bottom line liquid level has reached the critical value, in order to avoid the risk of dry running caused by the water pump 101 continuing to run, the operating gear of the water pump 101 can be determined to be the third operating gear, that is, the target operating power is determined to be the third target operating power, the third target operating power is zero, and the water pump 101 is controlled to stop running.

[0093] Furthermore, the controller in this embodiment can detect the liquid level information in the water container in real time, and match the corresponding target operating power based on the detected liquid level information in real time, so as to control the water pump to operate according to the target operating power.

[0094] Therefore, it can be seen that the hierarchical control strategy adopted in this embodiment of the application can improve the pumping efficiency at high liquid levels and ensure equipment safety at low liquid levels. At the same time, by introducing a backflow liquid level difference during the control of the water pump 101, the liquid level fluctuation caused by the backflow of residual liquid in the transmission pipe 104 is avoided from interfering with the control decision and causing misjudgment, thus improving the accuracy of the control of the water pump 101.

[0095] In some embodiments of this application, the target operating power can also be calculated based on the liquid level difference between the liquid level information in the water container 103 and the preset bottom line liquid level, so as to control the water pump 101 to operate according to the target operating power. Specifically, the water pump 101 control system 100 can also include a PID calculation module. The PID calculation module stores PID adjustment parameters and backflow compensation parameters in advance. By inputting the liquid level difference into the PID calculation module, the target operating power can be calculated to control the water pump 101 to operate according to the target operating power. The PID adjustment parameters can include a proportional coefficient, integral time, and derivative time. The proportional coefficient is used to adjust the change ratio of the target operating power, the integral time is used to eliminate the static deviation of the liquid level, the derivative time is used to predict the change trend of the liquid level difference and suppress liquid level overshoot, and the backflow compensation parameter is a deviation correction parameter for the backflow interference of the liquid remaining in the transmission pipe 104.

[0096] In some embodiments of this application, when the liquid level difference between the liquid level in the water container 103 and the preset bottom line liquid level reaches a critical value, triggering the water pump 101 to stop operating, the liquid remaining in the transmission pipe 104 will flow back into the water container 103, causing a change in the liquid level in the water container 103. Therefore, after the liquid remaining in the transmission pipe 104 flows back, the target operating power needs to be determined again based on the liquid level after the flow. Specifically, when the liquid level difference between the liquid level in the water container 103 and the preset bottom line liquid level is less than or equal to the liquid level difference threshold, after a preset waiting time, once the liquid flow in the transmission pipe 104 is completed, the target operating power is re-determined based on the liquid level difference between the liquid level corresponding to the flow and the preset bottom line liquid level, as well as the flow level difference. The technical means used to determine the target operating power here is the same as the aforementioned technical means for determining the target operating power, and will not be repeated here.

[0097] The following section will further elaborate on the overall control flow of the controller in the aforementioned water pump control system, specifically as follows: Figure 3 As shown, Figure 3 This is a schematic diagram of the overall control flow of the controller in a water pump control system provided in an embodiment of this application.

[0098] Depend on Figure 3 As shown, the controller 102 can first acquire the liquid pressure information at the bottom of the water container sent by the water pump's built-in control module 106 and the gas pressure information of the external environment of the water container 103 collected by the second sensor 107. Then, based on the liquid pressure information at the bottom of the water container 103 and the gas pressure information of the external environment of the water container 103, it can determine the liquid level information inside the water container 103. Furthermore, it determines the liquid level difference between the liquid level corresponding to the liquid level information inside the water container 103 and the preset bottom line liquid level, and determines the liquid level difference threshold based on the preset backflow liquid level difference.

[0099] Furthermore, the controller 102 can determine whether the liquid level difference between the liquid level information corresponding to the liquid level in the water container 103 and the preset bottom line liquid level is greater than the return liquid level difference. If so, the controller 102 can determine that the operating gear of the water pump 101 is the first operating gear, that is, determine the target operating power as the first target operating power, and control the water pump 101 to operate according to the first target operating power and operate at the corresponding speed. If not, the controller 102 can determine whether the liquid level difference between the liquid level information corresponding to the liquid level in the water container 103 and the preset bottom line liquid level is greater than the liquid level difference threshold.

[0100] If the liquid level difference between the liquid level information in water container 103 and the preset bottom line liquid level is greater than the liquid level difference threshold, the operating gear of water pump 101 can be determined as the second operating gear, that is, the target operating power is determined as the second target operating power, and the water pump is controlled to operate at the second target operating power and at the corresponding speed; if the liquid level difference between the liquid level information in water container 103 and the preset bottom line liquid level is not greater than the liquid level difference threshold, the operating gear of water pump 101 can be determined as the third operating gear, that is, the target operating power is determined as the third target operating power, and the water pump is controlled to stop operating.

[0101] Therefore, in the water pump control system of this embodiment, the controller can receive liquid pressure information at the pump's location sent by the pump's built-in control module. Based on this liquid pressure information and the gas pressure information collected by the second sensor, the controller determines the liquid level information in the water container. Then, based on the liquid level difference between the liquid level corresponding to this information and the preset baseline liquid level, as well as a predetermined backflow liquid level difference, the controller determines the target operating power to control the pump to operate at the target operating power. Thus, the above-mentioned water pump control system can accurately determine the liquid level information in the water container and control the pump based on this information. For different liquid level information in the water container, it can match the target operating power to the current liquid level information, preventing the pump from continuously operating at a high power, which could lead to the depletion of liquid in the water container and mechanical wear due to dry burning. This achieves precise control of the water pump.

[0102] In addition, by introducing the backflow level difference in the process of controlling the water pump based on the level information, the target operating power is determined by comparing the level difference between the liquid level corresponding to the level information and the preset bottom level with the backflow level difference. This can eliminate the interference of level fluctuations caused by the backflow of residual liquid in the transmission pipe after the water pump stops on the control decision, and avoid the controller misjudging the actual liquid level in the water container due to the backflow of residual liquid in the transmission pipe, thus further improving the accuracy of water pump control.

[0103] Furthermore, the controller and water pump can be connected via a wireless power supply link for power and data transmission, thereby enabling control of the water pump. Compared to using a wired connection between the water pump and the controller, this eliminates the cumbersome steps of cable laying and facilitates installation and maintenance.

[0104] In some embodiments of this application, in addition to automatically controlling the water pump based on the liquid level information in the water container, the water pump can also be controlled according to a control mode set by the user based on their own needs. For example, the user can independently set the operating power and duration of the water pump through the control panel of devices such as humidifiers, water purifiers, and water dispensers. After receiving the user's input command, the controller can control the water pump based on the current liquid level information in the water container. If the liquid level in the water container is sufficient, the water pump can be controlled to run directly according to the operating power and duration specified in the user's input command. If the liquid level in the water container is close to a preset minimum level, a prompt message can be sent to the user to remind them to add liquid before setting the operating power and duration of the water pump. This ensures equipment safety while meeting the user's personalized needs.

[0105] This application also provides a water pump control method, which is applied to the controller in the above-mentioned water pump control system, specifically as follows: Figure 4 As shown, Figure 4 This is a schematic flowchart of a water pump control method provided in an embodiment of this application.

[0106] S401, Receive liquid pressure information sent by the water pump's built-in control module. The liquid pressure information is the liquid pressure information at the bottom of the water container collected by the first sensor. The first sensor is communicatively connected to the water pump's built-in control module.

[0107] S402, acquire the gas pressure information of the external environment of the water container collected by the second sensor, and determine the liquid level information of the liquid in the water container based on the liquid pressure information and the gas pressure information.

[0108] S403, determine the target operating power based on the liquid level difference between the liquid level corresponding to the liquid level information and the preset bottom line liquid level, as well as the predetermined return liquid level difference.

[0109] S404 sends a target command carrying the target operating power to the water pump's built-in control module, so that the water pump's built-in control module responds to the target command and controls the water pump to operate at the target operating power.

[0110] The controller can receive liquid pressure information transmitted by the water pump's built-in control module via a wireless power supply link, and acquire gas pressure information of the external environment of the water container collected by the second sensor. Based on this liquid and gas pressure information, it determines the liquid level information inside the water container. Furthermore, based on the liquid level difference between the corresponding liquid level and the preset baseline liquid level, as well as a pre-determined backflow liquid level difference, it determines the target operating power.

[0111] A target command containing the target operating power is sent to the water pump's built-in control module, so that the water pump's built-in control module responds to the target command and controls the water pump to operate at the target operating power.

[0112] Therefore, the controller can receive liquid pressure information at the pump's location from the pump's built-in control module. Based on this liquid pressure information and the gas pressure information collected by the second sensor, it determines the liquid level information in the water container. Then, based on the liquid level difference between this level and a preset baseline level, as well as a pre-determined backflow level difference, it determines the target operating power to control the pump to operate at the target power. Thus, the above pump control method can accurately determine the liquid level information in the water container and control the pump based on this information. For different liquid levels in the water container, it can match the target operating power to the current liquid level, preventing the pump from continuously operating at a high power, which could lead to the depletion of liquid in the water container and mechanical wear due to dry burning. This achieves precise control of the pump. In addition, by introducing the backflow level difference in the process of controlling the water pump based on the level information, the target operating power is determined by comparing the level difference between the liquid level corresponding to the level information and the preset bottom level with the backflow level difference. This can eliminate the interference of level fluctuations caused by the backflow of residual liquid in the transmission pipe after the water pump stops on the control decision, and avoid the controller misjudging the actual liquid level in the water container due to the backflow of residual liquid in the transmission pipe, thus further improving the accuracy of water pump control.

[0113] This application also provides a water pump control device, specifically as follows: Figure 5 As shown, Figure 5 This is a schematic diagram of a water pump control device provided in an embodiment of this application. The water pump control device 500 may include:

[0114] The receiving module 501 is used to receive liquid pressure information sent by the water pump's built-in control module through a wireless power supply link. The liquid pressure information is the liquid pressure information at the location of the water pump collected by the first sensor set on the water pump.

[0115] The acquisition module 502 is used to acquire the gas pressure information of the external environment of the water container collected by the second sensor, and determine the liquid level information of the liquid in the water container based on the liquid pressure information and the gas pressure information.

[0116] The determination module 503 is used to determine the target operating power based on the liquid level difference between the liquid level corresponding to the liquid level information and the preset bottom line liquid level, as well as the predetermined return liquid level difference.

[0117] The sending module 504 is used to send a target command carrying the target operating power to the built-in control module of the water pump, so that the built-in control module of the water pump responds to the target command and controls the water pump to operate according to the target operating power.

[0118] This application also provides a computer device, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein the processor executes the computer program to implement the above-described water pump control method.

[0119] Figure 6 This is a schematic diagram of the hardware structure of a computer device provided in an embodiment of this application.

[0120] The computer device in this application embodiment may include: a processor 601 and a memory 602 storing computer program instructions.

[0121] Specifically, the processor 601 may include a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits that can be configured to implement the embodiments of this application.

[0122] Memory 602 may include mass storage for data or instructions. For example, and not limitingly, memory 602 may include a hard disk drive (HDD), floppy disk drive, flash memory, optical disk, magneto-optical disk, magnetic tape, or Universal Serial Bus (USB) drive, or a combination of two or more of these. Where appropriate, memory 602 may include removable or non-removable (or fixed) media. Where appropriate, memory 602 may be internal or external to the integrated gateway disaster recovery device. In a particular embodiment, memory 602 is non-volatile solid-state memory.

[0123] The processor 601 reads and executes computer program instructions stored in the memory 602 to implement any of the water pump control methods in the above embodiments.

[0124] In one example, the computer device may also include a communication interface 603 and a bus 610. Wherein, as... Figure 6 As shown, the processor 601, memory 602, and communication interface 603 are connected through bus 610 and complete communication with each other.

[0125] The communication interface 603 is mainly used to realize communication between various modules, devices, units and / or equipment in the embodiments of this application.

[0126] Bus 610 includes hardware, software, or both, that couples components of a device together. For example, and not limitingly, the bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), HyperTransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an Infinite Bandwidth Interconnect, a Low Pin Count (LPC) bus, a memory bus, a Microchannel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local (VLB) bus, or other suitable buses, or combinations of two or more of these. Where appropriate, bus 610 may include one or more buses. Although specific buses are described and illustrated in embodiments of this application, any suitable bus or interconnect is contemplated herein.

[0127] Embodiments of this application also provide a computer-readable storage medium, which includes a stored computer program, wherein the computer program, when running, controls the device where the computer-readable storage medium is located to perform the method described above. Optionally, the computer-readable storage medium may be read-only memory (ROM), random access memory (RAM), compact-disc read-only memory (CD-ROM), magnetic tape, floppy disk, and optical data storage device, etc.

[0128] Those skilled in the art will understand that all or part of the steps of the above embodiments can be implemented by hardware, or by a program instructing related hardware to implement the program. The program can be stored in a computer-readable storage medium, such as a read-only memory, a disk, or an optical disk.

[0129] The above are merely optional embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A water pump control system, characterized in that, The system includes: a water pump, a controller, a first sensor, and a second sensor; The water pump includes a built-in control module, which is communicatively connected to the first sensor. The water pump is used to draw liquid from a water container, and the controller is communicatively connected to the second sensor. The water pump has a built-in control module for acquiring the liquid pressure information at the bottom of the water container collected by the first sensor and sending the liquid pressure information to the controller. The controller is configured to acquire gas pressure information of the external environment of the water container collected by the second sensor; determine the liquid level information of the liquid in the water container based on the liquid pressure information and the gas pressure information; determine the target operating power based on the liquid level difference between the liquid level corresponding to the liquid level information and the preset bottom liquid level and the predetermined backflow liquid level difference, and send a target command carrying the target operating power to the water pump's built-in control module; wherein, the backflow liquid level difference is the liquid level at which the liquid level in the water container rises due to the backflow of residual liquid in the transmission pipe after the water pump stops pumping liquid into the water container. The difference is defined as follows: when the liquid level difference is greater than the return liquid level difference, the target operating power is determined as the first target operating power; when the liquid level difference is less than or equal to the return liquid level difference and the liquid level difference is greater than a liquid level difference threshold, the target operating power is determined as the second target operating power; when the liquid level difference is less than or equal to the liquid level difference threshold, the target operating power is determined to be zero; the liquid level difference threshold is the product of the return liquid level difference and a preset ratio, and the liquid level difference threshold represents the critical value for the pump to stop; the first target operating power is greater than the second target operating power, and the second target operating power is not zero; The built-in control module of the water pump is also used to control the water pump to operate at the target operating power in response to the target command.

2. The system according to claim 1, characterized in that, The system further includes: a wireless power supply transmitting module and a wireless power supply receiving module. The wireless power supply receiving module is disposed on the water pump and is electrically connected to the water pump. The water pump is disposed on the inner bottom of the water container, and the wireless power supply transmitting module is disposed on the outer bottom of the water container. The wireless power supply transmitting module and the wireless power supply receiving module are vertically aligned. The wireless power supply transmitting module is electrically connected to the controller, and the controller is disposed outside the water container. The controller is also used to receive a device start command sent by the user; In response to the device start command, the wireless power supply transmitter module and the wireless power supply receiver module are controlled to form a magnetic field coupling connection to establish a wireless power supply link. The wireless power supply link is used to carry the power transmission and data transmission between the controller and the water pump. Electrical energy is transmitted to the water pump and the first sensor via the wireless power supply link.

3. The system according to claim 1, characterized in that, The controller is specifically used to determine the pressure difference between the liquid pressure corresponding to the liquid pressure information and the gas pressure corresponding to the gas pressure information; The liquid level information in the water container is determined based on the pressure difference, the preset liquid density parameter, and the preset gravitational acceleration parameter.

4. The system according to claim 1, characterized in that, The controller is also used to send a start command to the built-in control module of the water pump; The water pump has a built-in control module, which responds to the start command and controls the water pump to perform the extraction operation corresponding to the start command until the liquid level in the water container reaches the preset bottom level, then stops the extraction operation and sends a feedback command to the controller. The controller is further configured to, in response to the feedback instruction, determine the return liquid level information in the water container after the liquid in the transmission pipe has returned to the container after a preset waiting time, and determine the liquid level difference between the liquid level corresponding to the return liquid level information and the preset bottom liquid level as the return liquid level difference, wherein the transmission pipe is used to transmit the liquid drawn by the water pump from the water container.

5. The system according to claim 1, characterized in that, The controller is also used to send a start command to the built-in control module of the water pump; The water pump has a built-in control module, which responds to the start command and controls the water pump to perform the extraction operation corresponding to the start command until the liquid level in the water container reaches the preset bottom level, then stops the extraction operation and sends a feedback command to the controller. The controller is further configured to, in response to the feedback instruction, after a preset waiting time, acquire reflux liquid volume information after the liquid reflux in the transmission pipe is completed, and determine the reflux liquid level difference based on the reflux liquid volume information and the size information of the water container, wherein the transmission pipe is used to transmit the liquid drawn by the water pump from the water container.

6. The system according to claim 1, characterized in that, The controller is further configured to, when the liquid level difference is less than or equal to the liquid level difference threshold, after the liquid in the transmission pipe has returned to its original state after a preset waiting time, redetermine the target operating power based on the liquid level difference between the liquid level corresponding to the returned liquid level information and the preset bottom line liquid level, as well as the return liquid level difference. The transmission pipe is used to transmit the liquid drawn by the water pump from the water container.

7. A water pump control method, characterized in that, include: The system receives liquid pressure information sent by the water pump's built-in control module. The liquid pressure information is the liquid pressure information at the bottom of the water container collected by the first sensor, which is communicatively connected to the water pump's built-in control module. The gas pressure information of the external environment of the water container is acquired by the second sensor, and the liquid level information of the liquid in the water container is determined based on the liquid pressure information and the gas pressure information. The target operating power is determined based on the liquid level difference between the liquid level corresponding to the liquid level information and the preset bottom liquid level, as well as the predetermined return liquid level difference. The return liquid level difference is the liquid level difference value that causes the liquid level in the water container to rise due to the return of residual liquid in the transmission pipe to the water container after the water pump stops pumping liquid. When the liquid level difference is greater than the return liquid level difference, the target operating power is determined as a first target operating power. When the liquid level difference is less than or equal to the return liquid level difference and the liquid level difference is greater than a liquid level difference threshold, the target operating power is determined as a second target operating power. When the liquid level difference is less than or equal to the liquid level difference threshold, the target operating power is determined to be zero. The liquid level difference threshold is the product of the return liquid level difference and a preset ratio, and the liquid level difference threshold represents the critical value for stopping the water pump. The first target operating power is greater than the second target operating power, and the second target operating power is not zero. A target command carrying the target operating power is sent to the water pump's built-in control module, so that the water pump's built-in control module responds to the target command and controls the water pump to operate according to the target operating power.

8. A computer device, characterized in that, The computer device includes a processor and a memory, the memory being used to store at least one program, the at least one program being loaded by the processor and executed as described in claim 7.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores at least one program, which is loaded and executed by a processor to implement the pump control method as described in claim 7.

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