A control method and device of a water pump system, a terminal device, a vehicle and a medium

Abstract

This application provides a control method, apparatus, terminal equipment, vehicle, and medium for a water pump system. The method includes: acquiring the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system; determining a frequency range based on the fluctuation coefficient; determining a target control frequency from the frequency range when it is necessary to control the operation of the target water pump system; and controlling the operation of the target water pump system based on the target control frequency. This method can adjust the pulse width modulation frequency in real time to disperse the energy density at a specific frequency, reduce the impact on surrounding systems, and improve the robustness of surrounding systems.

Description

Technical Field

[0001] This application relates to the field of system control technology, and in particular to a control method, device, terminal equipment, vehicle, and storage medium for a water pump system. Background Technology

[0002] As vehicles become increasingly intelligent and electric, the density of electronic and electrical components in vehicles is rising, leading to a more severe electromagnetic environment and more prominent electromagnetic compatibility issues. Simultaneously, the increasing power density is driving up the heat dissipation requirements of vehicle systems, thus increasing the need for PWM (Pulse Width Modulation) controlled water pump systems.

[0003] However, because PWM-controlled power actuators have high voltage change rates (du / dt) and current change rates (di / dt), they exhibit high external electromagnetic emissions. When controlling a water pump system based on PWM, electromagnetic coupling may cause interference to surrounding systems. For example, when sharing a wiring harness with a sensitive system (such as a 5V sensor), spatial coupling through the harness can easily cause voltage fluctuations in the sensitive system, resulting in signal distortion. In severe cases, this can even lead to malfunctions in the sensitive system, causing accidents.

[0004] Therefore, how to reduce the impact on surrounding systems and improve the robustness of surrounding systems when controlling the operation of a water pump system based on PWM is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this application is to provide a control method, device, terminal equipment, vehicle, and computer-readable storage medium for a water pump system, which can reduce the impact on surrounding systems and improve the robustness of surrounding systems when the water pump system is controlled based on PWM.

[0006] Firstly, this application provides a control method for a water pump system. The method includes:

[0007] Obtain the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system;

[0008] The frequency range is determined based on the fluctuation coefficient;

[0009] When it is necessary to control the operation of the target water pump system, the target control frequency is determined from the frequency range;

[0010] The target water pump system is controlled to operate based on the target control frequency.

[0011] In one embodiment, obtaining the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system includes:

[0012] Obtain the system layout parameters of the target water pump system and the surrounding systems; the system layout parameters include the wiring distance and wiring length of the parallel wiring between the target water pump system and the surrounding systems;

[0013] The fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system is determined based on the system layout parameters.

[0014] In one embodiment, determining the fluctuation coefficient corresponding to the pulse width modulation frequency of the target pump system based on the system layout parameters includes:

[0015] The fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system is determined based on the relationship between the wiring distance and the preset wiring distance threshold, and the relationship between the wiring length and the preset wiring length threshold.

[0016] In one embodiment, determining the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system based on the relationship between the wiring distance and a preset wiring distance threshold, and the relationship between the wiring length and a preset wiring length threshold, includes:

[0017] If the wiring distance is greater than a preset wiring distance threshold and the wiring length is less than a preset wiring length threshold, then the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system is determined based on the wiring distance coefficient, the wiring length coefficient, the wiring length, and the wiring distance.

[0018] In one embodiment, determining the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system based on the relationship between the wiring distance and a preset wiring distance threshold, and the relationship between the wiring length and a preset wiring length threshold, includes:

[0019] If the wiring distance is less than or equal to a preset wiring distance threshold, or the wiring length is greater than or equal to a preset wiring length threshold, then the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system is determined based on the wiring distance coefficient, the wiring length coefficient, the wiring distance, the wiring length, the preset wiring distance threshold, and the preset wiring length threshold.

[0020] In one embodiment, determining the target control frequency from the frequency range when it is necessary to control the operation of the target water pump system includes:

[0021] When it is necessary to control the operation of the target water pump system, the target control frequency is determined from the frequency range using a random function.

[0022] Secondly, this application also provides a control device for a water pump system. The device includes:

[0023] The acquisition module is used to acquire the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system;

[0024] A range determination module is used to determine the frequency range based on the fluctuation coefficient;

[0025] The target determination module is used to determine the target control frequency from the frequency range when it is necessary to control the operation of the target water pump system.

[0026] The control module is used to control the operation of the target water pump system based on the target control frequency.

[0027] Thirdly, this application also provides a terminal device. The terminal device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the method described above.

[0028] Fourthly, this application also provides a vehicle, including a vehicle body and a controller that performs the steps of the method described above.

[0029] Fifthly, this application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the method described above.

[0030] This application provides a control method for a water pump system. By obtaining the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system and determining the frequency range based on the fluctuation coefficient, when it is necessary to control the operation of the target water pump system, the target control frequency is determined from the frequency range, and the operation of the target water pump system is controlled based on the target control frequency. Since the target control frequency determined from the frequency range may be different each time the target water pump system needs to be controlled, this method can adjust the pulse width modulation frequency in real time to disperse the energy density at a specific frequency, reduce the impact on the surrounding system, and improve the robustness of the surrounding system.

[0031] It is understood that the control device, terminal equipment, vehicle, and computer-readable storage medium for a water pump system provided in the embodiments of this application have the same beneficial effects as the control method for a water pump system described above, and will not be repeated here. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0033] Figure 1 A flowchart of a control method for a water pump system provided in an embodiment of this application;

[0034] Figure 2 A schematic diagram illustrating the operation control of a target water pump based on a fixed control frequency, provided as an embodiment of this application;

[0035] Figure 3 A schematic diagram illustrating the operation control of a target water pump based on a target control frequency, provided as an embodiment of this application;

[0036] Figure 4 This is a schematic diagram of the structure of a vehicle system provided in an embodiment of this application;

[0037] Figure 5 A schematic diagram of the structure of a control device for a water pump system provided in an embodiment of this application;

[0038] Figure 6 This is a schematic diagram of the structure of a terminal device provided in an embodiment of this application. Detailed Implementation

[0039] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of this application with unnecessary detail.

[0040] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0041] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0042] As used in this application specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if detected [the described condition or event]" may be interpreted, depending on the context, as meaning "once determined," "in response to determination," "once detected [the described condition or event]," or "in response to detection [the described condition or event]."

[0043] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0044] References to "one embodiment" or "some embodiments" in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized. "A plurality" means "two or more."

[0045] The present application provides a method for controlling a water pump system, which can be executed by the processor of a terminal device when running a corresponding computer program.

[0046] Figure 1 The flowchart illustrates a control method for a water pump system according to an embodiment of this application. For ease of explanation, only the parts relevant to this embodiment are shown. The method provided in this embodiment includes the following steps:

[0047] S100: Obtain the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system.

[0048] It should be noted that the target water pump system in this embodiment refers to a water pump system based on PWM control. PWM-controlled power actuators have high voltage change rates (du / dt) and current change rates (di / dt), resulting in high external electromagnetic emission. When controlling the water pump system based on PWM, electromagnetic coupling may cause interference to surrounding systems. For example, when sharing a wiring harness with a sensitive system (such as a 5V sensor), spatial coupling through the harness can easily cause voltage fluctuations in the sensitive system, leading to signal distortion. In severe cases, it may even cause the sensitive system to malfunction, resulting in an accident. In other words, the method in this embodiment controls the operation of the target water pump system to reduce the interference of the PWM-controlled target water pump system with surrounding systems arranged in the same wiring harness due to excessive electromagnetic emission through wiring harness coupling.

[0049] Among them, the pulse width modulation frequency refers to the frequency at which the target water pump system operates based on PWM control; the fluctuation coefficient represents the fluctuation range corresponding to the pulse width modulation frequency.

[0050] S200: Determine the frequency range based on the fluctuation coefficient.

[0051] Specifically, after obtaining the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system, the fluctuation range is determined based on the fixed control frequency and fluctuation coefficient of the target water pump system. For example, assuming the fixed control frequency is f and the fluctuation coefficient is θ, then with the fixed control frequency f as the center frequency, the lower limit of the frequency f-θ and the upper limit of the frequency f+θ are determined based on the fluctuation coefficient, and the frequency range is determined to be [f-θ, f+θ].

[0052] In this embodiment, the fluctuation coefficient can be set as a constant value, that is, the corresponding frequency range is a fixed range; or the fluctuation coefficient can be set as a variable, that is, the corresponding frequency range is a fluctuation range; this embodiment does not limit the specific method of obtaining the fluctuation coefficient.

[0053] S300: When it is necessary to control the operation of the target water pump system, determine the target control frequency from the frequency range.

[0054] Specifically, after determining the frequency range, when it is necessary to control the operation of the target water pump system, the target control frequency is determined based on the frequency range, that is, the target control frequency is determined from the frequency range.

[0055] In practical applications, the target control frequency can be randomly determined from the frequency range, or values ​​can be selected sequentially from the frequency range according to a preset order to determine the target control frequency. This embodiment does not limit the specific method of determining the target control frequency from the frequency range.

[0056] S400: Controls the operation of the target water pump system based on the target control frequency.

[0057] In this step, after determining the target control frequency, the target water pump system is controlled to operate based on the target control frequency.

[0058] It should be noted that the pulse width modulation of the target water pump system is the main source of its electromagnetic emission. If analyzed in the frequency domain, its external electromagnetic interference frequency is often at the modulation frequency of its pulse width or its higher harmonics.

[0059] Figure 2 This is a schematic diagram illustrating the operation control of a target water pump based on a fixed control frequency, as provided in an embodiment of this application. Figure 3 This is a schematic diagram illustrating the operation control of a target water pump based on a target control frequency, provided as an embodiment of this application. After determining the target control frequency from the frequency range according to the method of this embodiment, the frequency of pulse width modulation is adjusted in real time, thereby achieving the effect of dispersing the energy density at a specific frequency (fixed control frequency f), thus reducing electromagnetic interference to surrounding systems (sensitive systems).

[0060] It should also be noted that the larger the fluctuation coefficient of the pulse width modulation frequency, the larger the corresponding frequency range, the greater the dispersion of the frequency range, and therefore the more stable the surrounding system.

[0061] This application provides a method for controlling a water pump system. By acquiring the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system and determining the frequency range based on the fluctuation coefficient, when it is necessary to control the operation of the target water pump system, a target control frequency is determined from the frequency range, and the operation of the target water pump system is controlled based on the target control frequency. Since the target control frequency determined from the frequency range may be different each time the target water pump system needs to be controlled, this method can adjust the pulse width modulation frequency in real time to disperse the energy density at a specific frequency, reduce the impact on the surrounding system, and improve the robustness of the surrounding system.

[0062] Based on the above embodiments, this embodiment further explains and optimizes the technical solution. Specifically, in this embodiment, obtaining the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system includes:

[0063] Obtain the system layout parameters of the target pump system and surrounding systems; the system layout parameters include the wiring distance and wiring length of the parallel wiring between the target pump system and surrounding systems;

[0064] Determine the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system based on the system layout parameters.

[0065] The peripheral system refers to the system that shares a wiring harness or runs parallel to the target water pump system. Specifically, the target water pump system includes a water pump controller and a water pump; the peripheral system also includes two parts, such as the sensors and controller of the 5V signal acquisition system; the target water pump system and the peripheral system are set up in parallel, therefore the wiring of the two control systems is parallel wiring.

[0066] In this embodiment, system layout parameters of the target water pump system and its corresponding peripheral systems are obtained. These parameters include the wiring distance and length of the parallel wiring between the target water pump system and the peripheral systems. The wiring distance refers to the distance between the wirings; it can be within the same wiring harness or different wiring harnesses, and this embodiment does not limit this. The wiring length refers to the collinear length between the target water pump system and the peripheral systems.

[0067] After obtaining the system layout parameters, namely the wiring distance and wiring length of the parallel wiring between the target water pump system and the surrounding systems, the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump is determined based on the wiring distance and wiring length.

[0068] According to the method of this embodiment, the fluctuation coefficient corresponding to the pulse width modulation frequency is determined based on the wiring distance and wiring length of the parallel wiring between the target water pump system and the surrounding system. This method can accurately and efficiently determine the fluctuation coefficient corresponding to the pulse width modulation frequency, thereby improving the efficiency of water pump control.

[0069] Based on the above embodiments, this embodiment further explains and optimizes the technical solution. Specifically, in this embodiment, determining the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system according to the system layout parameters includes:

[0070] The fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system is determined based on the relationship between the wiring distance and the preset wiring distance threshold, and the relationship between the wiring length and the preset wiring length threshold.

[0071] It should be noted that the wiring distance is positively correlated with the degree of impact on the surrounding system. That is, the longer the wiring distance, i.e. the greater the distance between parallel wire harnesses, the smaller the impact of wire harness spatial coupling on the surrounding system, and the higher the robustness of the surrounding system. Conversely, the shorter the wiring distance, i.e. the shorter the distance between parallel wire harnesses, the greater the impact of wire harness spatial coupling on the surrounding system, and the lower the robustness of the surrounding system.

[0072] Furthermore, the length of the cabling is negatively correlated with the degree of impact on the surrounding system. That is, the longer the cabling length, the longer the distance between parallel cablings, the greater the impact of cabling spatial coupling on the surrounding system, and the lower the robustness of the surrounding system. Conversely, the shorter the cabling length, the shorter the distance between parallel cablings, the smaller the impact of cabling spatial coupling on the surrounding system, and the higher the robustness of the surrounding system.

[0073] Among them, the preset wiring distance threshold refers to the minimum value of the wiring distance. When the wiring distance is less than the preset wiring distance threshold, the spatial coupling of the wiring harness will affect the normal operation of the surrounding system. The preset wiring length threshold refers to the maximum value of the collinear length. When the wiring length exceeds the preset wiring length threshold, the spatial coupling of the wiring harness will affect the normal operation of the surrounding system.

[0074] In this embodiment, the wiring distance is compared with a preset wiring distance threshold to obtain a first comparison result; the wiring length is compared with a preset wiring length threshold to obtain a second comparison result; and then the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system is determined based on the first comparison result and the second comparison result.

[0075] As can be seen, the method of this embodiment can efficiently and conveniently determine the fluctuation coefficient corresponding to the pulse width modulation frequency, thereby improving the efficiency of water pump control.

[0076] Based on the above embodiments, this embodiment further explains and optimizes the technical solution. Specifically, in this embodiment, the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system is determined according to the relationship between the wiring distance and a preset wiring distance threshold, and the relationship between the wiring length and a preset wiring length threshold, including:

[0077] If the wiring distance is greater than the preset wiring distance threshold and the wiring length is less than the preset wiring length threshold, then the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system is determined based on the wiring distance coefficient, wiring length coefficient, wiring length and wiring distance.

[0078] It is understandable that, since the wiring distance is positively correlated with the degree of impact on the surrounding system and the wiring length is negatively correlated with the degree of impact on the surrounding system, in this embodiment, it is determined whether the wiring distance is greater than a preset wiring distance threshold and whether the wiring length is less than a preset wiring length threshold. If the wiring distance is greater than the preset wiring distance threshold and the wiring length is less than the preset wiring length threshold, it means that the parallel wiring between the target water pump system and the surrounding system is within the allowable range. In order to minimize the impact of the spatial coupling of the parallel wiring harness on the surrounding system, the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system is determined according to the wiring distance coefficient, wiring length coefficient, wiring length and wiring distance.

[0079] As can be seen, the fluctuation coefficient corresponding to the pulse width modulation frequency determined by the method of this embodiment can reduce the impact on the surrounding system and improve the robustness of the surrounding system.

[0080] Based on the above embodiments, this embodiment further explains and optimizes the technical solution. Specifically, in this embodiment, the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system is determined according to the relationship between the wiring distance and a preset wiring distance threshold, and the relationship between the wiring length and a preset wiring length threshold, including:

[0081] If the wiring distance is less than or equal to the preset wiring distance threshold, or the wiring length is greater than or equal to the preset wiring length threshold, then the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system is determined based on the wiring distance coefficient, wiring length coefficient, wiring distance, wiring length, preset wiring distance threshold, and preset wiring length threshold.

[0082] It is understandable that, since the wiring distance is positively correlated with the degree of impact on the surrounding system and the wiring length is negatively correlated with the degree of impact on the surrounding system, in this embodiment, if it is determined that the wiring distance is less than or equal to the preset wiring distance threshold, or the wiring length is greater than or equal to the preset wiring length threshold, the fluctuation coefficient is set to the maximum value allowed by the system, so as to ensure that the theoretical dispersion of the pulse width modulation frequency corresponding to the target water pump system is maximized.

[0083] In this embodiment, if it is determined that the wiring distance is less than or equal to a preset wiring distance threshold, or the wiring length is greater than or equal to a preset wiring length threshold, then the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system is determined based on the wiring distance coefficient, wiring length coefficient, wiring distance, wiring length, preset wiring distance threshold, and preset wiring length threshold.

[0084] Specifically, if the wiring distance is less than or equal to the preset wiring distance threshold and the wiring length is greater than or equal to the preset wiring length threshold, then the fluctuation coefficient corresponding to the pulse width modulation frequency is determined based on the wiring distance coefficient, the wiring length coefficient, the preset wiring distance threshold, and the preset wiring length threshold.

[0085] If the wiring distance is less than or equal to the preset wiring distance threshold, and the wiring length is less than the preset wiring length threshold, then the fluctuation coefficient corresponding to the pulse width modulation frequency is determined based on the wiring distance coefficient, wiring length coefficient, wiring length and preset wiring distance threshold.

[0086] If the wiring distance is greater than the preset wiring distance threshold and the wiring length is greater than or equal to the preset wiring length threshold, then the fluctuation coefficient corresponding to the pulse width modulation frequency is determined based on the wiring distance coefficient, the wiring length coefficient, the wiring distance, and the preset wiring length threshold.

[0087] In one specific embodiment, it is first determined whether the wiring distance is less than or equal to a preset wiring distance threshold; if the wiring distance is less than or equal to the preset wiring distance threshold, it is further determined whether the wiring length is less than or equal to a preset wiring length threshold; if the wiring length is less than or equal to the preset wiring length threshold, the fluctuation coefficient corresponding to the pulse width modulation frequency is determined based on the wiring distance coefficient, the wiring length coefficient, the preset wiring distance threshold, and the preset wiring length threshold; if the wiring length is greater than the preset wiring length threshold, the fluctuation coefficient corresponding to the pulse width modulation frequency is determined based on the wiring distance coefficient, the wiring length coefficient, the wiring length, and the preset wiring distance threshold.

[0088] If the wiring distance is greater than the preset wiring distance threshold, then it is further determined whether the wiring length is less than or equal to the preset wiring length threshold. If the wiring length is greater than the preset wiring length threshold, then the fluctuation coefficient corresponding to the pulse width modulation frequency is determined based on the wiring distance coefficient, wiring length coefficient, preset wiring distance threshold, and wiring distance. If the wiring length is less than or equal to the preset wiring length threshold, then the fluctuation coefficient corresponding to the pulse width modulation frequency is determined based on the wiring distance coefficient, wiring length coefficient, wiring length, and wiring distance.

[0089] Figure 4 This is a schematic diagram of a vehicle system provided in an embodiment of this application; the vehicle system includes a target water pump system and a corresponding peripheral system (sensitive system); wherein, the target water pump system includes a water pump controller and a water pump; the peripheral system (sensitive system) includes a sensitive system A device and a sensitive system B device; wherein, d represents the wiring distance between the target water pump system and the peripheral system parallel wiring; l represents the wiring length between the target water pump system and the peripheral system parallel wiring.

[0090] In one specific embodiment, considering the coupling mechanism of wire harness crosstalk, the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system is determined as follows, based on the relationship between the wiring distance and a preset wiring distance threshold, and the relationship between the wiring length and a preset wiring length threshold:

[0091]

[0092] Where, α L α is the wiring distance coefficient. D This is the wiring length factor; The preset wiring distance threshold between the target water pump system and the surrounding systems. The preset wiring length threshold is the threshold for the target water pump system and its surrounding systems.

[0093] As can be seen, the method of this embodiment can accurately determine the fluctuation coefficient based on the wiring of the target water pump system and the corresponding peripheral system, determine the target control frequency based on the fluctuation coefficient, and adjust the pulse width modulation frequency in real time to disperse the energy density at a specific frequency, reduce the impact on the peripheral system, and improve the robustness of the peripheral system.

[0094] Based on the above embodiments, this embodiment further explains and optimizes the technical solution. Specifically, in this embodiment, when it is necessary to control the operation of the target water pump system, the target control frequency is determined from the frequency range, including:

[0095] When it is necessary to control the operation of the target water pump system, the target control frequency is determined from the frequency range using a random function.

[0096] Here, the random function refers to the function used to generate random numbers; in this embodiment, when it is necessary to control the operation of the target water pump system, the random function is used to generate the target control frequency within the frequency range, that is, to determine the target control frequency from the frequency range.

[0097] In one specific implementation, assuming the frequency range is [f-θ, f+θ], the random function S(θ) is defined as:

[0098] S(θ) = SQ(f-θ, f+θ);

[0099] Its mathematical meaning is to randomly generate a value within the frequency range [f-θ, f+θ] as the target control frequency; its physical meaning is to adjust the frequency of the target water pump system based on PWM control in real time with the fixed control frequency f as the center frequency.

[0100] As can be seen, the method of this embodiment can disperse the energy density at a fixed control frequency and reduce interference to surrounding systems.

[0101] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0102] Figure 5 This is a schematic diagram of the structure of a control device for a water pump system provided in an embodiment of this application. Figure 5 As shown, the control device for the water pump system in this embodiment includes an acquisition module 510, a range determination module 520, a target determination module 530, and a control module 540; wherein,

[0103] The acquisition module 510 is used to acquire the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system;

[0104] Range determination module 520 is used to determine the frequency range based on the fluctuation coefficient;

[0105] The target determination module 530 is used to determine the target control frequency from the frequency range when it is necessary to control the operation of the target water pump system.

[0106] The control module 540 is used to control the operation of the target water pump system based on the target control frequency. The water pump system control device provided in this application embodiment has the same beneficial effects as the water pump system control method described above.

[0107] In one specific embodiment, the acquisition module 510 includes:

[0108] The system layout parameter acquisition submodule is used to acquire the system layout parameters of the target pump system and the surrounding systems; the system layout parameters include the wiring distance and wiring length of the parallel wiring between the target pump system and the surrounding systems;

[0109] The fluctuation coefficient determination submodule is used to determine the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system based on the system layout parameters.

[0110] In one specific embodiment, the fluctuation coefficient determination submodule includes:

[0111] The fluctuation coefficient determination unit is used to determine the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system based on the relationship between the wiring distance and the preset wiring distance threshold, and the relationship between the wiring length and the preset wiring length threshold.

[0112] In one specific embodiment, the fluctuation coefficient determination submodule includes:

[0113] The first fluctuation coefficient determination unit is used to determine the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system based on the wiring distance coefficient, wiring length coefficient, wiring length and wiring distance if the wiring distance is greater than the preset wiring distance threshold and the wiring length is less than the preset wiring length threshold.

[0114] In one specific embodiment, the fluctuation coefficient determination submodule includes:

[0115] The second fluctuation coefficient determination unit is used to determine the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system based on the wiring distance coefficient, wiring length coefficient, wiring distance, wiring length, preset wiring distance threshold, and preset wiring length threshold if the wiring distance is less than or equal to a preset wiring distance threshold, or the wiring length is greater than or equal to a preset wiring length threshold.

[0116] In one specific embodiment, the target determination module 530 includes:

[0117] The random function submodule is used to determine the target control frequency from a frequency range using a random function when it is necessary to control the operation of the target water pump system.

[0118] It should be noted that the information interaction and execution process between the above-mentioned devices / units are based on the same concept as the method embodiments of this application. For details on their specific functions and technical effects, please refer to the method embodiments section, and they will not be repeated here.

[0119] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0120] Figure 6 This is a schematic diagram of the structure of a terminal device provided in an embodiment of this application. Figure 6 As shown, the terminal device 600 of this embodiment includes a memory 601, a processor 602, and a computer program 603 stored in the memory 601 and executable on the processor 602; when the processor 602 executes the computer program 603, it implements the steps in the control method embodiments of the various water pump systems described above; or when the processor 602 executes the computer program 603, it implements the functions of each module / unit in the various device embodiments described above.

[0121] For example, computer program 603 can be divided into one or more modules / units, one or more of which are stored in memory 601 and executed by processor 602 to implement the method of the embodiments of this application. One or more modules / units can be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of computer program 603 in terminal device 600. For example, computer program 603 can be divided into an acquisition module, a range determination module, a target determination module, and a control module, with the specific functions of each module as follows:

[0122] The acquisition module is used to acquire the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system;

[0123] The range determination module is used to determine the frequency range based on the fluctuation coefficient.

[0124] The target determination module is used to determine the target control frequency from the frequency range when it is necessary to control the operation of the target water pump system.

[0125] The control module is used to control the operation of the target water pump system based on the target control frequency.

[0126] In applications, terminal device 600 can be a vehicle controller, vehicle infotainment system controller, desktop computer, laptop, handheld computer, cloud server, or other computing device. Terminal device 600 may include, but is not limited to, memory 601 and processor 602. Those skilled in the art will understand that... Figure 6 This is merely an example of a terminal device and does not constitute a limitation on the terminal device. It may include more or fewer components than shown, or combine certain components, or different components. For example, a terminal device may also include input / output devices, network access devices, buses, etc.; among which, input / output devices may include cameras, audio acquisition / playback devices, displays, etc.; network access devices may include communication modules for wireless communication with external devices.

[0127] In applications, the processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor.

[0128] In applications, memory can be an internal storage unit of a terminal device, such as its hard drive or RAM; it can also be an external storage device, such as a plug-in hard drive, Smart Media Card (SMC), Secure Digital (SD) card, or Flash Card; or it can include both internal and external storage units. Memory is used to store operating systems, applications, boot loaders, data, and other programs, such as computer program code. Memory can also be used to temporarily store data that has been output or will be output.

[0129] This application also provides a vehicle, including a vehicle body and a controller, which executes the steps in the above-described method embodiments.

[0130] The vehicle provided in this application embodiment has the same beneficial effects as the control method of the water pump system described above because the controller executes the steps in the various method embodiments described above.

[0131] This application also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, can implement the steps in the above-described method embodiments.

[0132] This application implements all or part of the processes in the methods of the above embodiments, which can be accomplished by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable file, or some intermediate form. The computer-readable medium can include at least: any entity or device capable of carrying the computer program code to a terminal device, a recording medium, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium, such as a USB flash drive, a portable hard drive, a magnetic disk, or an optical disk.

[0133] The computer-readable storage medium provided in this application embodiment has the same beneficial effects as the control method for the water pump system described above.

[0134] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0135] Those skilled in the art will recognize that the device and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0136] In the embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interface, or the device may be indirectly coupled or communicated, and may be electrical, mechanical, or other forms.

[0137] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A control method for a water pump system, characterized in that, The method includes: Obtain the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system; The frequency range is determined based on the fixed control frequency of the target water pump system and the fluctuation coefficient; the lower limit and upper limit of the frequency are determined based on the fluctuation coefficient, with the fixed control frequency as the center frequency, to obtain the frequency range. When it is necessary to control the operation of the target water pump system, the target control frequency is determined from the frequency range using a random function; The target water pump system is controlled to operate based on the target control frequency.

2. The method according to claim 1, characterized in that, The step of obtaining the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system includes: Obtain the system layout parameters of the target water pump system and the surrounding systems; the system layout parameters include the wiring distance and wiring length of the parallel wiring between the target water pump system and the surrounding systems; The fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system is determined based on the system layout parameters.

3. The method according to claim 2, characterized in that, The step of determining the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system based on the system layout parameters includes: The fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system is determined based on the relationship between the wiring distance and the preset wiring distance threshold, and the relationship between the wiring length and the preset wiring length threshold.

4. The method according to claim 3, characterized in that, The step of determining the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system based on the relationship between the wiring distance and a preset wiring distance threshold, and the relationship between the wiring length and a preset wiring length threshold, includes: If the wiring distance is greater than a preset wiring distance threshold and the wiring length is less than a preset wiring length threshold, then the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system is determined based on the wiring distance coefficient, the wiring length coefficient, the wiring length, and the wiring distance.

5. The method according to claim 3, characterized in that, The step of determining the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system based on the relationship between the wiring distance and a preset wiring distance threshold, and the relationship between the wiring length and a preset wiring length threshold, includes: If the wiring distance is less than or equal to a preset wiring distance threshold, or the wiring length is greater than or equal to a preset wiring length threshold, then the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system is determined based on the wiring distance coefficient, the wiring length coefficient, the wiring distance, the wiring length, the preset wiring distance threshold, and the preset wiring length threshold.

6. A control device for a water pump system, characterized in that, The device includes: The acquisition module is used to acquire the fluctuation coefficient corresponding to the pulse width modulation frequency of the target water pump system; The range determination module is used to determine the frequency range based on the fixed control frequency of the target water pump system and the fluctuation coefficient; taking the fixed control frequency as the center frequency, the lower limit of the frequency and the upper limit of the frequency are determined according to the fluctuation coefficient to obtain the frequency range. The target determination module is used to determine the target control frequency from the frequency range using a random function when it is necessary to control the operation of the target water pump system. The control module is used to control the operation of the target water pump system based on the target control frequency.

7. A terminal device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the method as described in any one of claims 1 to 5.

8. A vehicle, comprising a vehicle body, characterized in that, It also includes a controller that performs the steps of the method as described in any one of claims 1 to 5.

9. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method as described in any one of claims 1 to 5.

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