Vacuum Pump Control Method, Device, Computer Equipment and Readable Storage Medium

Abstract

The present application relates to a vacuum pump control method, device, computer device, and readable storage medium. By obtaining the operating parameters of the vacuum pump in the current control mode and determining the target control mode based on the operating parameters and the threshold corresponding to the current control mode, the operating parameters include the continuous operating time and / or the vacuum degree, and the current control mode and the target control mode respectively include a preset number of working cycles; taking the target control mode as the current control mode and controlling the vacuum pump to work based on the current control mode. The vacuum pump control method provided by the embodiments of the present application can effectively avoid misjudgment caused by accidental instantaneous abnormalities generated by the impact of other circuits on the vacuum pump and the vacuum degree sensor, improve the reliability of the vacuum pump braking system, and further enhance the stability of the vehicle driving.

Description

Technical Field

[0001] This application relates to the technical field of vacuum pumps, and in particular, to a vacuum pump control method, device, computer device, and readable storage medium. Background Art

[0002] With the promotion of global energy conservation and emission reduction, new energy vehicles and related technologies have developed rapidly. At present, most new energy vehicles on the market rely on an electronic vacuum pump to assist the braking system, so a complete and perfect vacuum pump control strategy is particularly important.

[0003] In traditional vacuum pump control methods, the working state of the vacuum pump is usually determined by only making a single judgment on the vacuum pump or its parameters. However, due to the complexity of the vehicle's wiring, there may be many reasons for momentary abnormalities in the vacuum pump and vacuum sensor caused by impacts. Therefore, traditional vacuum pump control technologies may lead to misjudgments of the working state of the vacuum pump, guiding the vehicle's braking system to perform incorrect operations, thereby affecting the normal driving of the vehicle. Summary of the Invention

[0004] Based on this, in view of the above technical problems, it is necessary to provide a vacuum pump control method, device, computer device, and readable storage medium that can more accurately determine the working state of the vacuum pump.

[0005] In a first aspect, this application provides a vacuum pump control method. The method includes:

[0006] Obtain the working parameters of the vacuum pump in the current control mode, and determine the target control mode based on the working parameters and the threshold corresponding to the current control mode. The working parameters include the continuous working time and / or the vacuum degree. The current control mode and the target control mode each include a preset number of working cycles;

[0007] Take the target control mode as the current control mode, and control the vacuum pump to work based on the current control mode.

[0008] In one embodiment, the controlling the vacuum pump to work based on the current control mode includes:

[0009] Control the vacuum pump to stop after continuously evacuating for a first period in each round of the working cycle, and start the next working cycle after an interval of a second period from the stop of evacuation.

[0010] In one embodiment, if the current control mode is the first-level control mode, the threshold of the current control mode includes a vacuum pump stop threshold and a first preset number; the determining the target control mode based on the working parameters and the threshold of the current control mode includes:

[0011] The vacuum pump performs the working cycle of the first preset number of times. If the degree of vacuum in any working cycle is not less than the stop threshold of the vacuum pump, it is determined that the target control mode is the first-level control mode.

[0012] In one embodiment, the threshold of the current control mode further includes a start threshold of the vacuum pump, and the start threshold of the vacuum pump is less than the stop threshold of the vacuum pump. Determining the target control mode based on the working parameters and the threshold of the current control mode further includes:

[0013] If in the last working cycle, the degree of vacuum is less than the start threshold of the vacuum pump, it is determined that the target control mode is the first-level fault detection mode, where the start threshold of the vacuum pump in the first-level fault detection mode is equal to the start threshold of the vacuum pump in the first-level control mode, and the stop threshold of the vacuum pump in the first-level fault detection mode is equal to the stop threshold of the vacuum pump in the first-level control mode;

[0014] If in the last working cycle, the degree of vacuum is not less than the start threshold of the vacuum pump and less than the stop threshold of the vacuum pump, it is determined that the target control mode is the second-level control mode, where the start threshold of the vacuum pump in the second-level control mode is less than the start threshold of the vacuum pump in the first-level control mode, and the stop threshold of the vacuum pump in the second-level control mode is less than the stop threshold of the vacuum pump in the first-level control mode.

[0015] In one embodiment, the threshold of the current control mode further includes a first vacuum degree threshold. Before determining that the target control mode is the second-level control mode, determining the target control mode based on the working parameters and the threshold of the current control mode further includes:

[0016] If in the last working cycle, the maximum pressure drop of the degree of vacuum is greater than the first vacuum degree threshold, it is determined that the vacuum pump has a vacuum degree leakage fault and the vacuum pump is controlled to continue working;

[0017] Eliminate the fault when the degree of vacuum is not less than the stop threshold of the vacuum pump, and determine that the target control mode is the first-level control mode.

[0018] In one embodiment, if the current control mode is the first-level fault detection mode, the threshold of the current control mode includes a start threshold of the vacuum pump and a second preset number of times; determining the target control mode based on the working parameters and the threshold of the current control mode includes:

[0019] The vacuum pump performs the working cycle of the second preset number of times. If the degree of vacuum in any working cycle is not less than the start threshold of the vacuum pump, it is determined that the target control mode is the first-level control mode, where the start threshold of the vacuum pump in the first-level fault detection mode is equal to the start threshold of the vacuum pump in the first-level control mode.

[0020] In one embodiment, the determining of the target control mode based on the working parameters and the thresholds of the current control mode further includes:

[0021] If the degree of vacuum is less than the vacuum pump start threshold in all working cycles, it is determined that the vacuum pump has a persistent low vacuum fault and the vacuum pump is controlled to continue working;

[0022] Eliminate the fault when the degree of vacuum is not less than the vacuum pump start threshold, and determine that the target control mode is the first-level control mode.

[0023] In one embodiment, if the current control mode is the second-level control mode, the thresholds of the current control mode include a vacuum pump stop threshold, a first time threshold, and a second time threshold, and the first time threshold is less than the second time threshold; the determining of the target control mode based on the working parameters and the thresholds of the current control mode includes:

[0024] If the continuous working time is not greater than the first time threshold and the degree of vacuum is not less than the vacuum pump stop threshold, it is determined that the target control mode is the first-level control mode;

[0025] If the continuous working time is not greater than the second time threshold and the degree of vacuum is not less than the vacuum pump stop threshold, it is determined that the target control mode is the second-level control mode, wherein the vacuum pump stop threshold in the second-level control mode is less than the vacuum pump stop threshold in the first-level control mode.

[0026] In one embodiment, the thresholds of the current control mode further include a vacuum pump start threshold and a third preset number of times, and the vacuum pump start threshold is less than the vacuum pump stop threshold; the determining of the target control mode based on the working parameters and the thresholds of the current control mode includes:

[0027] The vacuum pump performs the working cycle for the third preset number of times. If the degree of vacuum is not less than the vacuum pump stop threshold in any working cycle, it is determined that the target control mode is the second-level control mode;

[0028] If the degree of vacuum is less than the vacuum pump start threshold in the last working cycle, it is determined that the target control mode is the second-level fault detection mode, wherein the vacuum pump start threshold in the second-level fault detection mode is equal to the vacuum pump start threshold in the second-level control mode, and the vacuum pump stop threshold in the second-level fault detection mode is equal to the vacuum pump stop threshold in the second-level control mode;

[0029] If in the last working cycle, the vacuum degree is not less than the vacuum pump start threshold and less than the vacuum pump stop threshold, it is determined that the vacuum pump has a vacuum degree leakage fault and the vacuum pump is controlled to continue working. When the vacuum degree is not less than the vacuum pump stop threshold, the fault is eliminated, and the target control mode is determined to be the secondary control mode, where the vacuum pump start threshold in the secondary control mode is less than the vacuum pump start threshold in the primary control mode.

[0030] In one embodiment, if the current control mode is the secondary fault detection mode, the thresholds of the current control mode include the vacuum pump start threshold, the vacuum pump stop threshold, and the fourth preset number of times, and the vacuum pump start threshold is less than the vacuum pump stop threshold; determining the target control mode based on the working parameters and the thresholds of the current control mode includes:

[0031] The vacuum pump performs the working cycle for the fourth preset number of times. If the vacuum degree in any working cycle is not less than the vacuum pump stop threshold, it is determined that the target control mode is the secondary control mode;

[0032] If in all working cycles, the vacuum degree is less than the vacuum pump stop threshold, it is determined that the vacuum pump has a persistent low vacuum fault and the vacuum pump is controlled to continue working. When the vacuum degree is not less than the vacuum pump start threshold, the fault is eliminated, and the target control mode is determined to be the primary control mode, where the vacuum pump start threshold in the secondary fault detection mode is equal to the vacuum pump start threshold in the secondary control mode, the vacuum pump stop threshold in the secondary fault detection mode is equal to the vacuum pump stop threshold in the secondary control mode, the vacuum pump start threshold in the secondary control mode is less than the vacuum pump start threshold in the primary control mode, and the vacuum pump stop threshold in the secondary control mode is less than the vacuum pump stop threshold in the primary control mode.

[0033] In a second aspect, the present application also provides a vacuum pump control device. The device includes:

[0034] A control mode determination module, configured to obtain the working parameters of the vacuum pump in the current control mode, and determine the target control mode based on the working parameters and the thresholds corresponding to the current control mode. The working parameters include the continuous working time and / or the vacuum degree, and the current control mode and the target control mode each include multiple preset numbers of working cycles;

[0035] A control mode switching module, configured to use the target control mode as the current control mode, and control the vacuum pump to work based on the current control mode.

[0036] In a third aspect, the present application also provides a computer device. The computer device includes a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, the steps of the method according to any one of the above first aspects are implemented.

[0037] In a fourth aspect, the present application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program thereon, and when the computer program is executed by a processor, the steps of the method according to any one of the above first aspects are implemented.

[0038] For the above vacuum pump control method, device, computer device and readable storage medium, by detecting the working parameters in the current control mode and switching the current control mode to the target control mode according to the current working state of the vacuum pump, each control mode judges the working state of the vacuum pump. Multiple rounds of judgments can be made on the state of the vacuum pump according to multiple control modes, making the judgment results more accurate. On the other hand, each control mode includes a preset number of working cycles, which further refines the process of judging the working state of the vacuum pump in each control mode, and can further improve the accuracy of judging the state of the vacuum pump. The vacuum pump control method provided by the embodiments of the present application can effectively avoid misjudgment caused by accidental instantaneous abnormalities caused by the impact of other circuits on the vacuum pump and the vacuum degree sensor, improve the reliability of the vacuum pump braking system, and thus improve the stability of the whole vehicle driving.

[0039] Details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more comprehensible. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments and descriptions thereof of the present application are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings:

[0041] Figure 1 It is a schematic flow chart of a vacuum pump control method in an embodiment;

[0042] Figure 2 It is a schematic flow chart of a vacuum pump control method in a specific embodiment;

[0043] Figure 3 It is a structural block diagram of a vacuum pump control device in an embodiment;

[0044] Figure 4 It is an internal structure diagram of a computer device in an embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0045] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0046] Unless otherwise defined, the technical terms or scientific terms involved in the present application shall have the general meanings understood by those with ordinary skills in the technical field to which the present application pertains. In the present application, words such as "a", "one", "a kind of", "the", "these", etc. do not indicate a limitation in quantity, and they can be singular or plural. The terms "including", "comprising", "having" and any variants thereof involved in the present application are intended to cover non-exclusive inclusion; for example, a process, method, system, product or device including a series of steps or modules (units) is not limited to the listed steps or modules (units), but may include unlisted steps or modules (units), or may include other steps or modules (units) inherent in these processes, methods, products or devices. The terms "connected", "coupled" and the like involved in the present application are not limited to physical or mechanical connections, but may include electrical connections, whether directly or indirectly connected. The term "plurality" involved in the present application means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" may represent: A exists alone, A and B exist simultaneously, and B exists alone. Usually, the character " / " indicates that the objects associated before and after are in an "or" relationship. The terms "first", "second", "third", etc. involved in the present application are only used to distinguish similar objects and do not represent a specific order for the objects.

[0047] The following terms "module", "unit", etc. used herein are combinations of software and / or hardware that can achieve a predetermined function. Although the devices described in the following embodiments are preferably implemented in hardware, implementations in software, or combinations of software and hardware are also possible and contemplated.

[0048] In an embodiment of the present application, as Figure 1 shown, a vacuum pump control method is provided. In this embodiment, an example is given where this method is applied to a terminal. It can be understood that this method can also be applied to a server, and can also be applied to a system including a terminal and a server, and is implemented through the interaction between the terminal and the server. Among them, the terminal may include a vehicle terminal. In this embodiment, the method includes the following steps:

[0049] S201: Obtain the operating parameters of the vacuum pump in the current control mode, and determine the target control mode based on the operating parameters and the threshold corresponding to the current control mode. The operating parameters include the continuous operating time and / or the degree of vacuum, and the current control mode and the target control mode each include a preset number of operating cycles.

[0050] In the embodiments of the present application, the vacuum pump may include a vehicle braking vacuum pump. Specifically, the vehicle braking vacuum pump may include an independent braking vacuum pump, an auxiliary braking vacuum pump, etc. The control parameters of the vacuum pump may include the continuous operating time and / or the degree of vacuum of the vacuum pump. Among them, the degree of vacuum represents the thinness of the gas in the vacuum state, usually expressed by a pressure value, and the unit may be Pa, kPa, atmospheric pressure, etc. It can be understood that the higher the degree of vacuum, the thinner the gas in the vacuum state, that is, the better the braking assistance effect of the vacuum pump. In other embodiments, the operating parameters of the vacuum pump in the current control mode may further include the pressure drop of the vacuum pump within a preset time.

[0051] In the embodiments of the present application, the current control mode of the vacuum pump may include the current control mode of the vacuum pump in the vehicle braking control system, or may include the current control mode only for controlling the vacuum pump. The current control mode is the control mode that the vacuum pump is currently executing, and the target control mode includes the next control mode that the vacuum pump may execute or is about to execute. Among them, the control mode may include the control process of the vacuum pump, such as starting the vacuum pump, controlling the vacuum pump to operate continuously, controlling the vacuum pump to operate continuously for a preset time, controlling the vacuum pump to stop working, controlling the vacuum pump to stop working for a preset time, controlling the vacuum pump to start working again after stopping working for a preset time, controlling the vacuum pump to work or stop for a preset time within a preset cycle, etc. In the embodiments of the present application, the operating cycle may include a combination of one or more of the above vacuum pump control processes, the control mode may include a preset number of operating cycles, and the vacuum pump may execute corresponding work processes according to different control modes. In some embodiments, the threshold of the current control mode matches the current control mode. The threshold of the current control mode may include one or more of the vacuum pump start threshold, the vacuum pump stop threshold, the vacuum pump threshold, and the preset number of operating cycles. Based on the threshold of the current control mode and the operating parameters of the vacuum pump in the current control mode, the target control mode can be determined.

[0052] In the embodiments of the present application, obtaining the working parameters of the vacuum pump in the current control mode may include counting the continuous working time of the vacuum pump in the current control mode through a timer, and / or collecting the vacuum degree of the vacuum pump in the current control mode through a vacuum degree sensor. Among them, the vacuum degree sensor may include a field emission vacuum sensor, a piezoresistive vacuum sensor, etc. In some embodiments, determining the target control mode based on the working parameters and the threshold corresponding to the current control mode may include determining the working process and at least one preset condition of the vacuum pump in the current control mode based on the threshold corresponding to the current control mode, and determining the target control mode based on whether the working parameters of the vacuum pump meet at least one preset condition. For example, in a specific embodiment, if the current control mode is the first-level control mode, the threshold of the current control mode includes the vacuum pump stop threshold and the first preset number of times, and the vacuum pump start threshold is less than the vacuum pump stop threshold. At least one preset condition includes whether the vacuum degree of the vacuum pump in any one working cycle is not less than the vacuum pump stop threshold. The vacuum pump executes the working cycle of the first preset number of times. If the vacuum degree in any one working cycle is not less than the vacuum pump stop threshold, it is determined that the target control mode is still the first-level control mode.

[0053] S203: Take the target control mode as the current control mode, and control the vacuum pump to work based on the current control mode.

[0054] In the embodiments of the present application, in the case of determining the target control mode, take the target control mode as the current control mode, and control the vacuum pump to work based on the current control mode. After adjusting the current control mode to the target control mode, the threshold corresponding to the current control mode is also adaptively adjusted to the threshold corresponding to the target control mode, and the next target control mode is determined based on the working parameters of the vacuum pump and the threshold of the adjusted current control mode.

[0055] In the related art, the normal or faulty working state of a vacuum pump is usually determined through a single judgment. The anti-interference ability of this judgment method is relatively low. For example, when the sensor is affected by current disturbance, it will instantaneously affect the accuracy of the working parameters of the vacuum pump, resulting in a false alarm of the working state of the vacuum pump, affecting the normal operation of the vehicle braking system and thus affecting the normal driving of the vehicle. The vacuum pump control method provided in this application detects the working parameters in the current control mode, switches the current control mode to the target control mode according to the current working state of the vacuum pump, and each control mode judges the working state of the vacuum pump. The state of the vacuum pump can be judged in multiple rounds according to multiple control modes, making the judgment result more accurate. On the other hand, each control mode includes a preset number of working cycles, which further refines the process of judging the working state of the vacuum pump in each control mode, and can further improve the accuracy of judging the state of the vacuum pump. The vacuum pump control method provided in the embodiments of this application can effectively avoid misjudgment caused by accidental instantaneous abnormalities generated by other circuits impacting the vacuum pump and the vacuum degree sensor, improve the reliability of the vacuum pump braking system, and thus enhance the stability of the whole vehicle driving.

[0056] To more accurately judge the working state of the vacuum pump, in step S203 of the embodiment of this application, controlling the vacuum pump to work based on the current control mode includes:

[0057] S2031: Control the vacuum pump to stop after continuously evacuating for the first period in each working cycle, and start the next working cycle after an interval of the second period since stopping the evacuation.

[0058] In the embodiment of this application, when the vacuum pump works based on the current control mode, it stops after continuously evacuating for the first period in each working cycle, and starts the next working cycle after an interval of the second period since stopping the evacuation. On the one hand, through multiple working cycles, the actual working state of the vacuum pump is determined, and whether there is a continuous working fault of the vacuum pump is determined; on the other hand, through multiple starts, operations and stops, the current disturbance generated by other circuits and the possible impact on the vacuum degree sensor can be avoided to a certain extent, which can improve the accuracy of the working parameters of the vacuum pump obtained and also improve the accuracy of judging the working state of the vacuum pump.

[0059] The following illustrates the control method of the vacuum pump in different current control modes through each embodiment.

[0060] In one embodiment, if the current control mode is the primary control mode, the thresholds of the current control mode include the vacuum pump stop threshold and the first preset number; determining the target control mode based on the working parameters and the thresholds of the current control mode includes:

[0061] S301: The vacuum pump executes the working cycle for the first preset number of times. If the degree of vacuum in any working cycle is not less than the vacuum pump stop threshold, it is determined that the target control mode is the first-level control mode.

[0062] In the embodiments of the present application, the first-level control mode can preliminarily judge the working state of the vacuum pump. In the first-level control mode, the vacuum pump stop threshold VAC2 is the threshold used to represent the normal operation of the vacuum pump. The vacuum pump executes the working cycle for the first preset number of times. If the degree of vacuum in any working cycle is not less than the vacuum pump stop threshold VAC2, it is determined that the vacuum pump is in a normal working state, and then it is determined that the target control mode is still the first-level control mode, and there is no need to determine the target control mode as other working modes to further determine whether the vacuum pump is working properly. In some embodiments, if the degree of vacuum in any working cycle is not less than the vacuum pump stop threshold, it is possible to immediately switch to the first-level control mode without completing the current working cycle, saving computing resources to a certain extent and improving the control efficiency of the vacuum pump.

[0063] In one embodiment, if the current control mode is the first-level control mode, the threshold of the current control mode further includes the vacuum pump start threshold, and the vacuum pump start threshold is less than the vacuum pump stop threshold. Determining the target control mode based on the working parameters and the threshold of the current control mode further includes:

[0064] S401: If in the last working cycle, the degree of vacuum is less than the vacuum pump start threshold, it is determined that the target control mode is the first-level fault detection mode, where the vacuum pump start threshold in the first-level fault detection mode is equal to the vacuum pump start threshold in the first-level control mode, and the vacuum pump stop threshold in the first-level fault detection mode is equal to the vacuum pump stop threshold in the first-level control mode;

[0065] S402: If in the last working cycle, the degree of vacuum is not less than the vacuum pump start threshold and less than the vacuum pump stop threshold, it is determined that the target control mode is the second-level control mode, where the vacuum pump start threshold in the second-level control mode is less than the vacuum pump start threshold in the first-level control mode, and the vacuum pump stop threshold in the second-level control mode is less than the vacuum pump stop threshold in the first-level control mode.

[0066] In the embodiments of the present application, in the first-level control mode, the vacuum pump start threshold VAC1 is the threshold used to represent the normal operation of the vacuum pump. In some embodiments, before obtaining the working parameters of the vacuum pump in the current control mode, the vacuum pump control method provided by the embodiments of the present application further includes obtaining the initial degree of vacuum of the vacuum pump. If the initial degree of vacuum of the vacuum pump is less than the vacuum pump start threshold VAC1, it is determined that the degree of vacuum of the vacuum pump is low, and then it is determined that the current control mode is the first-level control mode; if the initial degree of vacuum of the vacuum pump is not less than the vacuum pump start threshold VAC1, it is determined that the degree of vacuum of the vacuum pump meets the working requirements and the vacuum pump does not work.

[0067] In the embodiment of the present application, in the primary control mode, the vacuum pump performs a first preset number of working cycles. If, in the last working cycle, the degree of vacuum is less than the vacuum pump startup threshold VAC1, it is determined that after the first preset number of working cycles, the difference between the degree of vacuum of the vacuum pump and the vacuum degree threshold under normal working conditions is relatively large, and the working state of the vacuum pump may be abnormal. Therefore, the target control mode is determined to be the primary fault detection mode, and it is necessary to further determine whether the vacuum pump is faulty in the primary fault detection mode. The vacuum pump startup threshold in the primary fault detection mode is equal to the vacuum pump startup threshold in the primary control mode, and the vacuum pump stop threshold in the primary fault detection mode is equal to the vacuum pump stop threshold in the primary control mode. In other embodiments, if, in the last working cycle, the degree of vacuum is not less than the vacuum pump startup threshold VAC1 and less than the vacuum pump stop threshold VAC2, it is determined that the vacuum pump has increased the degree of vacuum to a certain extent through the first preset number of working cycles, meeting the requirement of the vacuum pump startup threshold VAC1, but still not meeting the requirement of the vacuum pump stop threshold VAC2 under normal working conditions. Therefore, the target control mode is determined to be the secondary control mode, and it is necessary to further determine the working state of the vacuum pump through the secondary control mode. It can be understood that the vacuum pump startup threshold in the secondary control mode is less than the vacuum pump startup threshold in the primary control mode, and the vacuum pump stop threshold in the secondary control mode is less than the vacuum pump stop threshold in the primary control mode to further determine the working state of the vacuum pump.

[0068] In one embodiment, if the current control mode is the primary control mode, the threshold of the current control mode further includes the first vacuum degree threshold. Before determining that the target control mode is the secondary control mode, determining the target control mode based on the working parameters and the threshold of the current control mode further includes:

[0069] S501: If, in the last working cycle, the maximum pressure drop of the degree of vacuum is greater than the first vacuum degree threshold, it is determined that the vacuum pump has a vacuum degree leakage fault and controls the vacuum pump to continue working.

[0070] S503: Eliminate the fault when the degree of vacuum is not less than the vacuum pump stop threshold, and determine that the target control mode is the primary control mode.

[0071] In the embodiments of the present application, the working state of the vacuum pump can be further determined by setting the first vacuum degree threshold as the threshold of the current control mode. In the primary control mode, the vacuum pump executes a first preset number of working cycles. If in the last working cycle, the vacuum degree is not less than the vacuum pump start threshold VAC1 and less than the vacuum pump stop threshold VAC2, and the maximum pressure drop of the vacuum degree is greater than the first vacuum degree threshold VAC4, it is determined that the vacuum degree increases after the vacuum pump executes the first preset number of working cycles, but does not reach the vacuum pump stop threshold VAC2. Since the maximum pressure drop is greater than the first vacuum degree threshold VAC4, it is determined that the reason for the vacuum degree not reaching the vacuum pump stop threshold VAC2 is not an abnormality in the vacuum pumping ability of the vacuum pump, but a vacuum degree leakage fault in the vacuum pump, resulting in the vacuum pump being unable to pump the vacuum degree to the stop threshold VAC2. Therefore, it is determined that the vacuum pump has a vacuum degree leakage fault and the vacuum pump is controlled to continue working. After the vacuum pump continues to work for a period of time, the fault is eliminated when the vacuum degree is not less than the vacuum pump stop threshold VAC2, and the target control mode is determined to be the primary control mode. After it is determined that the vacuum pump has a vacuum degree leakage fault, the fault can be eliminated through maintenance, or the fault can be temporarily eliminated when the degree of vacuum degree leakage is relatively low and does not affect the normal operation of the vacuum pump for the time being. In some embodiments, when it is determined that the vacuum pump has a vacuum degree leakage fault and the vacuum pump is controlled to continue working, an alarm for the vacuum degree leakage can also be included. When the degree of vacuum degree leakage is relatively low and does not affect the normal operation of the vacuum pump, an alarm for the vacuum degree leakage fault can remind the vehicle driver or the maintenance personnel to perform timely maintenance or repair on the vacuum pump.

[0072] In one embodiment, if the current control mode is the primary fault detection mode, the thresholds of the current control mode include the vacuum pump start threshold and the second preset number; determining the target control mode based on the working parameters and the thresholds of the current control mode includes:

[0073] S601: The vacuum pump executes the second preset number of working cycles. If the vacuum degree is not less than the vacuum pump start threshold in any working cycle, the target control mode is determined to be the primary control mode, where the vacuum pump start threshold in the primary fault detection mode is equal to the vacuum pump start threshold in the primary control mode.

[0074] In the embodiment of the present application, the primary fault detection mode can determine whether there is a fault in the vacuum pump based on the vacuum pump startup threshold VAC1. The vacuum pump executes a second preset number of working cycles. If the vacuum degree in any working cycle is not less than the vacuum pump startup threshold VAC1, it is determined that there is no fault in the vacuum pump, and the current control module can be adjusted to the primary control mode, that is, the target control mode is determined to be the primary control mode. In some embodiments, if the vacuum degree in any working cycle is not less than the vacuum pump startup threshold VAC1, it is possible to switch to the primary control mode immediately without completing the current working cycle, saving computing resources to a certain extent and improving the control efficiency of the vacuum pump. In other embodiments, after determining that the target control mode is the primary control mode, it further includes controlling the vacuum pump to continue working until the vacuum degree reaches the stop threshold VAC2.

[0075] In one embodiment, if the current control mode is the primary fault detection mode, determining the target control mode based on the working parameters and the threshold of the current control mode further includes:

[0076] S6011: If the vacuum degree is less than the vacuum pump startup threshold in all working cycles, it is determined that the vacuum pump has a persistent low vacuum fault and the vacuum pump is controlled to continue working;

[0077] S6012: Eliminate the fault when the vacuum degree is not less than the vacuum pump startup threshold, and determine the target control mode to be the primary control mode.

[0078] In the embodiment of the present application, the vacuum pump executes a second preset number of working cycles. If the vacuum degree is less than the vacuum pump startup threshold VAC1 in all working cycles, it is determined that after the vacuum pump executes the second preset number of working cycles, the vacuum degree still cannot meet the requirement of the startup threshold VAC1, and the working state of the vacuum pump is a fault, that is, it is determined that the vacuum pump has a persistent low vacuum fault and the vacuum pump is controlled to continue working. Eliminate the fault when the vacuum degree is not less than the vacuum pump startup threshold VAC1, and determine the target control mode to be the primary control mode. After determining that the vacuum pump has a persistent low vacuum fault, the fault can be eliminated through maintenance, or after the vacuum pump returns to the normal working state, the fault can be eliminated when the vacuum degree is not less than the vacuum pump startup threshold VAC1. In some embodiments, when it is determined that the vacuum pump has a persistent low vacuum fault and the vacuum pump is controlled to continue working, it may further include warning about the persistent low vacuum fault and controlling the vehicle speed not to exceed V km / h to remind the vehicle driver to repair or maintain the vacuum pump, and ensuring the safety of the driver by restricting the vehicle speed in case of a vacuum pump fault.

[0079] In some embodiments, if the current control mode is the secondary control mode, the thresholds of the current control mode include a vacuum pump stop threshold, a first time threshold, and a second time threshold, and the first time threshold is less than the second time threshold; determining the target control mode based on the working parameters and the thresholds of the current control mode includes:

[0080] S701: If the continuous working time is not greater than the first time threshold and the vacuum degree is not less than the vacuum pump stop threshold, determine that the target control mode is the primary control mode.

[0081] S703: If the continuous working time is not greater than the second time threshold and the vacuum degree is not less than the vacuum pump stop threshold, determine that the target control mode is the secondary control mode, where the vacuum pump stop threshold in the secondary control mode is less than the vacuum pump stop threshold in the primary control mode.

[0082] In the embodiments of the present application, the secondary control mode can further determine the working state of the vacuum pump. In the secondary control mode, the vacuum pump stop threshold VAC5 is less than the vacuum pump stop threshold VAC2 in the primary control mode. Based on the vacuum pump start threshold VAC5, the working state of the vacuum pump can be further determined. In some embodiments, the vacuum pump stop threshold in the secondary control mode can also be equal to the vacuum pump start threshold VAC1 of the primary control mode. If the current control mode is the secondary control mode, the thresholds of the current control mode further include a first time threshold and a second time threshold, and the first time threshold is less than the second time threshold. If the vacuum pump continuously works for no more than the first time threshold in the secondary control mode and the vacuum degree is not less than the vacuum pump stop threshold VAC5, it is determined that the vacuum pump can quickly reach the stop threshold VAC5 within the first time threshold, and the working state of the vacuum pump is determined to be normal, that is, the target control mode is determined to be the primary control mode. If the continuous working time is not greater than the second time threshold and the vacuum degree is not less than the vacuum pump stop threshold VAC5, it is determined that the vacuum pump cannot increase the vacuum degree to the stop threshold VAC5 within the first time threshold, but can increase the vacuum degree to the stop threshold VAC5 within the second time threshold. Therefore, it is still necessary to further determine the working state of the vacuum pump through the secondary control mode, that is, the target control mode is determined to be the secondary control mode.

[0083] In some embodiments, if the current control mode is the secondary control mode, the thresholds of the current control mode further include a vacuum pump start threshold and a third preset number of times, and the vacuum pump start threshold is less than the vacuum pump stop threshold; determining the target control mode based on the working parameters and the thresholds of the current control mode includes:

[0084] S801: The vacuum pump performs a third preset number of working cycles. If the vacuum degree is not less than the vacuum pump stop threshold in any working cycle, determine that the target control mode is the secondary control mode.

[0085] S803: If, in the last working cycle, the vacuum degree is less than the vacuum pump start threshold, determine that the target control mode is the secondary fault detection mode, where the vacuum pump start threshold in the secondary fault detection mode is equal to the vacuum pump start threshold in the secondary control mode, and the vacuum pump stop threshold in the secondary fault detection mode is equal to the vacuum pump stop threshold in the secondary control mode.

[0086] S805: If, in the last working cycle, the vacuum degree is not less than the vacuum pump start threshold and less than the vacuum pump stop threshold, determine that the vacuum pump has a vacuum degree leakage fault and control the vacuum pump to continue working. Eliminate the fault when the vacuum degree is not less than the vacuum pump stop threshold, and determine that the target control mode is the secondary control mode, where the vacuum pump start threshold in the secondary control mode is less than the vacuum pump start threshold in the primary control mode.

[0087] In the embodiment of the present application, if the current control mode is the secondary control mode, the vacuum pump start threshold VAC3 is less than the vacuum pump start threshold VAC1 in the primary control mode. The thresholds of the current control mode further include the vacuum pump start threshold and the third preset number of times, and the vacuum pump start threshold is less than the vacuum pump stop threshold. The vacuum pump executes the working cycle for the third preset number of times. If the vacuum degree in any working cycle is not less than the vacuum pump stop threshold VAC5, it is determined that the vacuum pump can meet the stop threshold requirement of the secondary control mode, but it is necessary to further determine whether the target control mode can be determined as the primary control mode through the secondary control mode, that is, determine that the target control mode is the secondary control mode. If, in the last working cycle, the vacuum degree is less than the vacuum pump start threshold VAC3, it is determined that the working state of the vacuum pump may be abnormal. Therefore, determine that the target control mode is the secondary fault detection mode, and it is necessary to further determine whether the vacuum pump is faulty in the secondary fault detection mode. It can be understood that the vacuum pump start threshold in the secondary fault detection mode is equal to the vacuum pump start threshold in the secondary control mode, and the vacuum pump stop threshold in the secondary fault detection mode is equal to the vacuum pump stop threshold in the secondary control mode. If, in the last working cycle, the vacuum degree is not less than the vacuum pump start threshold and less than the vacuum pump stop threshold, it is determined that the vacuum degree has been improved to a certain extent through the working cycle for the third preset number of times by the vacuum pump, meeting the requirement of the vacuum pump start threshold VAC3, but still not meeting the requirement of the vacuum pump stop threshold VAC5 in the normal working state. Therefore, it is determined that the target control mode remains the secondary control mode, and it is necessary to further determine the working state of the vacuum pump through the secondary control mode. It can be understood that the vacuum pump start threshold in the secondary control mode is less than the vacuum pump start threshold in the primary control mode.

[0088] In some embodiments, if the current control mode is the secondary fault detection mode, the thresholds of the current control mode include a vacuum pump start threshold, a vacuum pump stop threshold, and a fourth preset number of times, and the vacuum pump start threshold is less than the vacuum pump stop threshold; determining the target control mode based on the working parameters and the thresholds of the current control mode includes:

[0089] S901: The vacuum pump performs a working cycle for the fourth preset number of times. If the degree of vacuum in any one working cycle is not less than the vacuum pump start threshold, it is determined that the target control mode is the secondary control mode.

[0090] S903: If in all working cycles, the degree of vacuum is less than the vacuum pump start threshold, it is determined that the vacuum pump has a persistent low vacuum fault and the vacuum pump is controlled to continue working. The fault is eliminated when the degree of vacuum is not less than the vacuum pump stop threshold, and it is determined that the target control mode is the primary control mode. Among them, the vacuum pump start threshold in the secondary fault detection mode is equal to the vacuum pump start threshold in the secondary control mode, the vacuum pump stop threshold in the secondary fault detection mode is equal to the vacuum pump stop threshold in the secondary control mode, the vacuum pump start threshold in the secondary control mode is less than the vacuum pump start threshold in the primary control mode, and the vacuum pump stop threshold in the secondary control mode is less than the vacuum pump stop threshold in the primary control mode.

[0091] In the embodiment of the present application, the secondary fault detection mode can determine whether there is a fault in the vacuum pump based on the vacuum pump start threshold VAC3 and the vacuum pump stop threshold VAC5, and the vacuum pump start threshold is less than the vacuum pump stop threshold. The vacuum pump performs the working cycle for the fourth preset number of times. If the degree of vacuum in any working cycle is not less than the vacuum pump start threshold VAC3, it is determined that the vacuum pump does not have a fault temporarily, but the secondary control mode is still required to further determine the working state of the vacuum pump, that is, the target control mode is determined to be the secondary control mode. In some embodiments, if the degree of vacuum in any working cycle is not less than the vacuum pump start threshold VAC3, it is possible to switch to the secondary control mode immediately without completing the current working cycle, saving computing resources to a certain extent and improving the control efficiency of the vacuum pump. In other embodiments, after determining that the target control mode is the secondary control mode, it further includes controlling the vacuum pump to continue working until the degree of vacuum reaches the stop threshold VAC5. If the degree of vacuum is less than the vacuum pump start threshold VAC3 in all working cycles, it is determined that the vacuum pump has a persistent low vacuum fault and the vacuum pump is controlled to continue working. The fault is eliminated when the degree of vacuum is not less than the vacuum pump stop threshold VAC5, and the target control mode is determined to be the primary control mode. After determining that the vacuum pump has a persistent low vacuum fault, the fault can be eliminated through maintenance, or after the vacuum pump returns to the normal working state, the fault is eliminated when the degree of vacuum is not less than the vacuum pump stop threshold VAC5. In some embodiments, when it is determined that the vacuum pump has a persistent low vacuum fault and the vacuum pump is controlled to continue working, it may further include alarming for the persistent low vacuum fault and controlling the vehicle speed not to exceed V km / h to remind the vehicle driver to repair or maintain the vacuum pump, and ensuring the safety of the driver in case of a vacuum pump fault by restricting the vehicle speed. In the embodiment of the present application, any two or more of the first preset number, the second preset number, the third preset number, and the fourth preset number can be set to the same value, or can be set to different values respectively, which can be set according to actual needs, and the present application does not limit this.

[0092] The following uses a specific embodiment to illustrate the vacuum pump control method provided by the present application. As Figure 2As shown, after power is applied, the primary control mode is activated as the current control mode. The vacuum pump startup threshold for the primary control mode is VAC1, and the vacuum pump shutdown threshold is VAC2. A determination is then made as to whether the vacuum level reaches the shutdown threshold VAC2 within a first period T1s. If so, the target control mode is determined to be the primary control mode. If not, the vacuum pump is controlled to perform a first preset number N of work cycles, including controlling the vacuum pump to continuously pump vacuum for a first period T1s in each work cycle before stopping and then starting the next work cycle after a second period T2+1s has elapsed since stopping. If the vacuum level reaches the shutdown threshold VAC2 in any cycle, the target control mode is determined to be the primary control mode. If the vacuum level in all work cycles is less than the startup threshold VAC1, the target control mode is determined to be the primary fault detection mode.

[0093] If the current control mode is the first-level fault detection mode, the vacuum pump start threshold is VAC1, and the vacuum pump stop threshold is VAC2. The vacuum pump is controlled to continuously draw vacuum for a first period of time, T1s, in each work cycle, then stop. The next work cycle begins after a second period, T2+1s, from the time the vacuum stops. If the vacuum level in any work cycle reaches the start threshold, VAC1, the target control mode is determined to be the first-level control mode. If the vacuum level in all work cycles is below the start threshold, VAC1, a persistent low vacuum fault is reported, and the vacuum pump is controlled to continue operating, limiting the vehicle speed to V. The fault is resolved when the vacuum level reaches the start threshold, VAC1.

[0094] On the other hand, if the current control mode is the first-level control mode, in the 10th working cycle (excluding the first working cycle), the vacuum degree is not less than the start threshold VAC1 and less than the stop threshold VAC2, then it is determined whether the vacuum pressure drop in the 10th working cycle is greater than the first vacuum threshold VAC4kpa / s. If so, a vacuum leakage alarm is issued. When the vacuum degree reaches the stop threshold VAC2, the fault is eliminated, and the target control mode is determined to be the first-level control mode; if not, the target control mode is determined to be the second-level control mode.

[0095] If the current control mode is the secondary control mode, the starting threshold of the vacuum pump is VAC3, and the stopping threshold of the vacuum pump is VAC1. If the continuous working time of the vacuum pump in the secondary control mode is not greater than the first time threshold T3s and the vacuum degree is not less than the stopping threshold VAC1 of the vacuum pump, it is further determined whether the continuous working time of the vacuum pump is less than the second time threshold T4s when the vacuum degree reaches the stopping threshold VAC1 in the secondary control mode. If so, the target control mode is determined to be the primary control mode; if not, the target control mode is determined to be the secondary control mode. If the continuous working time of the vacuum pump in the secondary control mode is greater than the first time threshold T3s and the vacuum degree is less than the stopping threshold VAC1 of the vacuum pump, the vacuum pump is controlled to stop after continuously evacuating for the first time period T3s in each working cycle, and the next working cycle starts after an interval of the second time period T2 + 1s from the stop of evacuation. If the vacuum degree value reaches the stopping threshold VAC1 in any working cycle, the target control mode is determined to be the secondary control mode; if the vacuum degree value in the last working cycle is not less than the starting threshold VAC3 and less than the stopping threshold VAC1, a vacuum degree leakage alarm is given, the fault is eliminated when the vacuum degree reaches the stopping threshold VAC1, and the target control mode is determined to be the secondary control mode; if the vacuum degree in the last working cycle is less than the starting threshold VAC3, the target control mode is determined to be the secondary fault detection mode.

[0096] If the current control mode is the secondary fault detection mode, the starting threshold of the vacuum pump is VAC3, and the stopping threshold of the vacuum pump is VAC1. The vacuum pump is controlled to stop after continuously evacuating for the first time period T4s in each working cycle, and the next working cycle starts after an interval of the second time period T2 + 1s from the stop of evacuation. If the vacuum degree value reaches the starting threshold VAC3 in any working cycle, the target control mode is determined to be the secondary control mode; if the vacuum degree values in all working cycles are lower than the starting threshold VAC3, a persistent low vacuum fault is reported, the vacuum pump is controlled to continue working, the vehicle speed is limited to V, and the fault is eliminated when the vacuum degree reaches the starting threshold VAC1.

[0097] It should be understood that although the steps in the flowcharts involved in the above-described embodiments are sequentially shown in the direction of the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear description in this article, the execution of these steps has no strict order limit, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-described embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be executed alternately or alternately with at least a part of other steps or steps or stages in other steps.

[0098] Based on the same inventive concept, an embodiment of the present application further provides a vacuum pump control device for implementing the above-mentioned vacuum pump control method. The solution provided by this device to solve the problem is similar to the solution described in the above method. Therefore, the specific limitations in one or more embodiments of the following vacuum pump control device 100 can refer to the limitations on the vacuum pump control method in the above text, and will not be repeated here.

[0099] In one embodiment, as Figure 3 shown, a vacuum pump control device 100 is provided, including:

[0100] A control mode determination module 101, configured to obtain the working parameters of the vacuum pump in the current control mode, and determine the target control mode based on the working parameters and the threshold corresponding to the current control mode. The working parameters include the continuous working time and / or the vacuum degree. The current control mode and the target control mode each include multiple preset numbers of working cycles;

[0101] A control mode switching module 102, configured to use the target control mode as the current control mode, and control the vacuum pump to work based on the current control mode.

[0102] Each module in the above-mentioned vacuum pump control device 100 can be implemented in whole or in part by software, hardware, and their combination. The above-mentioned modules can be embedded in the processor of the computer device in hardware form or be independent of it, or can be stored in the memory of the computer device in software form, so as to facilitate the processor to call and execute the operations corresponding to the above-mentioned modules.

[0103] In one embodiment, a computer device is provided. This computer device can be a terminal, and its internal structure diagram can be as Figure 4As shown in the figure. The computer device includes a processor, a memory, a communication interface, a display screen, and an input device connected through a system bus. Among them, 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 and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be implemented through WIFI, a mobile cellular network, NFC (Near Field Communication), or other technologies. When the computer program is executed by the processor, it implements a vacuum pump control method. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen. The input device of the computer device can be a touch layer covered on the display screen, or a button, a trackball, or a touchpad provided on the housing of the computer device, or an external keyboard, touchpad, or mouse, etc.

[0104] Those skilled in the art can understand that Figure 4 the structure shown in the figure is only a block diagram of some structures related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine some components, or have different component arrangements.

[0105] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, it implements the steps of any one of the above vacuum pump control methods.

[0106] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in the present application are all information and data authorized by the user or fully authorized by all parties.

[0107] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, database, or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memories. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The databases involved in the embodiments provided in the present application can include at least one of relational databases and non-relational databases. Non-relational databases can include distributed databases based on blockchain, etc., without limitation. The processors involved in the embodiments provided in the present application can be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, data processing logics based on quantum computing, etc., without limitation.

[0108] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0109] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A method for controlling a vacuum pump, characterized in that, The method includes: Obtaining the working parameters of the vacuum pump in the current control mode, and determining the target control mode based on the working parameters and the threshold corresponding to the current control mode, where the working parameters include the continuous working time and / or the vacuum degree, and the current control mode and the target control mode respectively include a preset number of working cycles; Taking the target control mode as the current control mode, and controlling the vacuum pump to work based on the current control mode; If the current control mode is the first-level control mode, the threshold of the current control mode includes the vacuum pump stop threshold and the first preset number; determining the target control mode based on the working parameters and the threshold of the current control mode includes: the vacuum pump executes the first preset number of working cycles, and if the vacuum degree in any working cycle is not less than the vacuum pump stop threshold, it is determined that the target control mode is the first-level control mode; The threshold of the current control mode further includes the vacuum pump start threshold, and the vacuum pump start threshold is less than the vacuum pump stop threshold. Determining the target control mode based on the working parameters and the threshold of the current control mode further includes: If in the last working cycle, the vacuum degree is less than the vacuum pump start threshold, it is determined that the target control mode is the first-level fault detection mode, where the vacuum pump start threshold in the first-level fault detection mode is equal to the vacuum pump start threshold in the first-level control mode, and the vacuum pump stop threshold in the first-level fault detection mode is equal to the vacuum pump stop threshold in the first-level control mode; If in the last working cycle, the vacuum degree is not less than the vacuum pump start threshold and less than the vacuum pump stop threshold, it is determined that the target control mode is the second-level control mode, where the vacuum pump start threshold in the second-level control mode is less than the vacuum pump start threshold in the first-level control mode, and the vacuum pump stop threshold in the second-level control mode is less than the vacuum pump stop threshold in the first-level control mode.

2. The method according to claim 1, wherein Controlling the vacuum pump to work based on the current control mode includes: Controlling the vacuum pump to stop after continuously evacuating for the first period in each round of the working cycle, and starting the next working cycle after an interval of the second period since stopping the evacuation.

3. The method according to claim 1, wherein The threshold of the current control mode further includes the first vacuum degree threshold. Before determining that the target control mode is the second-level control mode, determining the target control mode based on the working parameters and the threshold of the current control mode further includes: If in the last working cycle, the maximum pressure drop of the vacuum degree is greater than the first vacuum degree threshold, it is determined that the vacuum pump has a vacuum degree leakage fault and the vacuum pump is controlled to continuously work; Eliminating the fault when the vacuum degree is not less than the vacuum pump stop threshold, and determining that the target control mode is the first-level control mode.

4. The method according to claim 1 or 2, characterized in that, If the current control mode is the first-level fault detection mode, the threshold of the current control mode includes the vacuum pump start threshold and the second preset number; determining the target control mode based on the working parameters and the threshold of the current control mode includes: The vacuum pump performs a second preset number of working cycles. If the degree of vacuum in any working cycle is not less than the start threshold of the vacuum pump, it is determined that the target control mode is the first-level control mode, where the start threshold of the vacuum pump in the first-level fault detection mode is equal to the start threshold of the vacuum pump in the first-level control mode.

5. The method according to claim 4, characterized in that, The determination of the target control mode based on the working parameters and the thresholds of the current control mode further includes: If in all working cycles, the degree of vacuum is less than the start threshold of the vacuum pump, it is determined that the vacuum pump has a persistent low-vacuum fault and the vacuum pump is controlled to continue working; Eliminate the fault when the degree of vacuum is not less than the start threshold of the vacuum pump, and determine that the target control mode is the first-level control mode.

6. The method according to claim 1 or 2, characterized in that, If the current control mode is the second-level control mode, the thresholds of the current control mode include a vacuum pump stop threshold, a first time threshold, and a second time threshold, and the first time threshold is less than the second time threshold; The determination of the target control mode based on the working parameters and the thresholds of the current control mode includes: If the continuous working time is not greater than the first time threshold and the degree of vacuum is not less than the vacuum pump stop threshold, it is determined that the target control mode is the first-level control mode; If the continuous working time is not greater than the second time threshold and the degree of vacuum is not less than the vacuum pump stop threshold, it is determined that the target control mode is the second-level control mode, where the vacuum pump stop threshold in the second-level control mode is less than the vacuum pump stop threshold in the first-level control mode.

7. The method according to claim 6, wherein The thresholds of the current control mode further include a vacuum pump start threshold and a third preset number. The vacuum pump start threshold is less than the vacuum pump stop threshold. The determination of the target control mode based on the working parameters and the thresholds of the current control mode includes: The vacuum pump performs a third preset number of working cycles. If the degree of vacuum in any working cycle is not less than the vacuum pump stop threshold, it is determined that the target control mode is the second-level control mode; If in the last working cycle, the degree of vacuum is less than the vacuum pump start threshold, it is determined that the target control mode is the second-level fault detection mode, where the vacuum pump start threshold in the second-level fault detection mode is equal to the vacuum pump start threshold in the second-level control mode, and the vacuum pump stop threshold in the second-level fault detection mode is equal to the vacuum pump stop threshold in the second-level control mode; If in the last working cycle, the degree of vacuum is not less than the vacuum pump start threshold and less than the vacuum pump stop threshold, it is determined that the vacuum pump has a vacuum leakage fault and the vacuum pump is controlled to continue working. Eliminate the fault when the degree of vacuum is not less than the vacuum pump stop threshold, and determine that the target control mode is the second-level control mode, where the vacuum pump start threshold in the second-level control mode is less than the vacuum pump start threshold in the first-level control mode.

8. The method according to claim 1 or 2, characterized in that, If the current control mode is the secondary fault detection mode, the thresholds of the current control mode include a vacuum pump start threshold, a vacuum pump stop threshold, and a fourth preset number of times, and the vacuum pump start threshold is less than the vacuum pump stop threshold; determining the target control mode based on the working parameters and the thresholds of the current control mode includes: The vacuum pump performs a fourth preset number of working cycles. If the vacuum degree in any one of the working cycles is not less than the vacuum pump start threshold, it is determined that the target control mode is the secondary control mode; If in all working cycles, the vacuum degree is less than the vacuum pump start threshold, it is determined that the vacuum pump has a persistent low vacuum fault and the vacuum pump is controlled to continue working. When the vacuum degree is not less than the vacuum pump stop threshold, the fault is eliminated, and it is determined that the target control mode is the primary control mode, where the vacuum pump start threshold in the secondary fault detection mode is equal to the vacuum pump start threshold in the secondary control mode, the vacuum pump stop threshold in the secondary fault detection mode is equal to the vacuum pump stop threshold in the secondary control mode, the vacuum pump start threshold in the secondary control mode is less than the vacuum pump start threshold in the primary control mode, and the vacuum pump stop threshold in the secondary control mode is less than the vacuum pump stop threshold in the primary control mode.

9. A vacuum pump control device, characterized in that, The device includes: A control mode determination module, configured to obtain the working parameters of the vacuum pump in the current control mode, and determine the target control mode based on the working parameters and the thresholds corresponding to the current control mode. The working parameters include the continuous working time and / or the vacuum degree, and the current control mode and the target control mode respectively include a plurality of preset numbers of working cycles; A control mode switching module, configured to use the target control mode as the current control mode, and control the vacuum pump to work based on the current control mode; If the current control mode is the primary control mode, the thresholds of the current control mode include a vacuum pump stop threshold and a first preset number of times; determining the target control mode based on the working parameters and the thresholds of the current control mode includes: the vacuum pump performs the first preset number of working cycles. If the vacuum degree in any one of the working cycles is not less than the vacuum pump stop threshold, it is determined that the target control mode is the primary control mode; The thresholds of the current control mode further include a vacuum pump start threshold, and the vacuum pump start threshold is less than the vacuum pump stop threshold. Determining the target control mode based on the working parameters and the thresholds of the current control mode further includes: If in the last working cycle, the vacuum degree is less than the vacuum pump start threshold, it is determined that the target control mode is the primary fault detection mode, where the vacuum pump start threshold in the primary fault detection mode is equal to the vacuum pump start threshold in the primary control mode, and the vacuum pump stop threshold in the primary fault detection mode is equal to the vacuum pump stop threshold in the primary control mode; If in the last working cycle, the degree of vacuum is not less than the vacuum pump start threshold and less than the vacuum pump stop threshold, it is determined that the target control mode is the secondary control mode, where the vacuum pump start threshold in the secondary control mode is less than the vacuum pump start threshold in the primary control mode, and the vacuum pump stop threshold in the secondary control mode is less than the vacuum pump stop threshold in the primary control mode.

10. A computer device, comprising a memory and a processor, the memory storing a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 8.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the method according to any one of claims 1 to 8.

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