A method and device for controlling water flow rate of a floor scrubber pump

Abstract

The present application discloses a method and device for controlling the water outlet flow of a floor scrubber pump, the method comprising: obtaining an expected value of the current water outlet flow of the water pump; obtaining a discontinuous PWM signal based on the expected value of the current water outlet flow of the water pump, wherein each cycle of the discontinuous PWM signal includes n pulse signals with a period of T1 and a duty cycle of D and a low-level signal with a duration of T2, where n is a natural number not less than 1; and using the discontinuous PWM signal as a driving signal for the water pump to drive the water pump so that the water outlet flow of the water pump meets the expected value. The present application discloses a method and device for controlling the water outlet flow of a floor scrubber pump, which, by using a discontinuous PWM signal as a driving signal for the water pump, can meet the precise control of a small water outlet flow of the water pump in any working scenario without adding any additional hardware to the floor scrubber, thereby improving the performance of the floor scrubber without increasing hardware costs, and making the working process of the floor scrubber more environmentally friendly and energy-saving.

Description

Technical Field

[0001] The present application relates to the technical field of floor scrubbers, and in particular to a method and device for controlling the water flow rate of a water pump of a floor scrubber. Background Art

[0002] Common floor scrubber pumps on the market currently use continuous PWM signals as their drive signals. Adjusting the pump's flow rate can often be achieved by adjusting the PWM signal's duty cycle or frequency. For example, reducing the pump's water flow rate can be achieved by lowering the PWM signal's duty cycle or frequency. However, this method of controlling water flow rate results in poor consistency between individual pumps when operating at low flow rates, leading to inaccurate water flow control. Summary of the Invention

[0003] In order to solve one or more of the above problems, the present application proposes a method and device for controlling the water outlet flow of a water pump of a floor scrubber.

[0004] According to one aspect of the present application, a method for controlling the water flow rate of a water pump of a floor scrubber is provided, comprising:

[0005] Get the expected value of the current water pump outlet flow;

[0006] According to the expected value of the current water pump outlet flow, a discontinuous PWM signal is obtained. Each cycle of the discontinuous PWM signal includes n pulse signals with a period of T1 and a duty cycle of D and a low-level signal with a duration of T2, where n is a natural number not less than 1;

[0007] The discontinuous PWM signal is used as the driving signal of the water pump to drive the water pump so that the water flow rate of the water pump meets the expected value.

[0008] In some embodiments, when the number of pulse signals in one cycle of the discontinuous PWM signal is greater than 1, all pulse signals in one cycle of the discontinuous PWM signal are continuous.

[0009] In some embodiments, a method for obtaining a discontinuous PWM signal includes:

[0010] Obtain a predetermined reference signal, where the reference signal is a continuous PWM signal, the reference signal has a period of T1 and a duty cycle of D;

[0011] A low-level signal is added to the reference signal, and the duration of the low-level signal is recorded as T2 to obtain a discontinuous PWM signal. The period of the discontinuous PWM signal is nT1+T2, where n is a natural number not less than 1.

[0012] In some embodiments, a method for determining a reference signal includes:

[0013] Take N water pumps of the same model, and record the optimal driving frequency of the water pump as F;

[0014] Set the expected water flow rate of the water pump to S;

[0015] Perform m drive tests on N water pumps, and record the average water flow rate Qi of the N water pumps in each drive test, where i = 1, 2, ..., m-1, m. In the m drive tests, the supply voltage, drive frequency, and drive time of the drive signal are the same, but the duty cycle is different. The drive frequency of the drive signal is the optimal drive frequency F of the water pump, and the duty cycle of the drive signal is recorded as Di, where i = 1, 2, ..., m-1, m, where m is a natural number not less than 2.

[0016] Calculate the absolute value of the difference between Qi and S, and take the Qi with the smallest absolute value of the difference between Qi and S. The corresponding Di is the duty cycle D of the reference signal, and the optimal driving frequency F of the water pump is equal to 1 / T1.

[0017] In some implementations, adding a low-level signal to a reference signal is achieved by controlling the switching of the reference signal between high and low levels.

[0018] According to another aspect of the present application, a device for controlling the water outlet flow of a floor scrubber pump is provided, and a method for controlling the water outlet flow of a floor scrubber pump provided in any of the above items is applied, comprising:

[0019] The water output expected value acquisition module is used to obtain the expected value of the current water pump output flow rate;

[0020] A discontinuous PWM signal acquisition module is used to obtain a discontinuous PWM signal according to the expected value of the current water pump outlet flow;

[0021] The driving module is used to drive the water pump using the obtained discontinuous PWM signal as a driving signal so that the water flow rate of the water pump meets the expected value.

[0022] In a third aspect, a floor scrubber is provided, comprising a processor and a memory, wherein the memory stores at least one instruction, at least one program, a code set, or an instruction set, and the at least one instruction, at least one program, or an instruction set is loaded and executed by the processor to implement any one of the above-mentioned methods for controlling the water outlet flow of a water pump of the floor scrubber.

[0023] In a fourth aspect, a computer-readable storage medium is provided, in which at least one instruction, at least one program, code set or instruction set is stored, and at least one instruction, at least one program, code set or instruction set is loaded and executed by a processor to implement any of the above-mentioned methods for controlling the water outlet flow of a floor scrubber pump.

[0024] The present application discloses a method and device for controlling the water outlet flow of a floor scrubber pump. By using a discontinuous PWM signal as the driving signal of the water pump, since the discontinuous PWM signal contains a reference signal, the water outlet of the water pump is stable within the working time of the reference signal. By adjusting the duration of the reference signal (i.e., the number n of pulse signals) and the duration of the low-level signal (i.e., the duration T2 of the low-level signal), any demand for the water outlet of the floor scrubber pump can be met. This method does not require any additional hardware to be added to the floor scrubber, and can meet the precise control of a small water outlet flow of the water pump in any working scenario. It does not require an increase in hardware costs while improving the performance of the floor scrubber, making the working process of the floor scrubber more environmentally friendly and energy-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a flow chart of a method for controlling the water outlet flow of a floor scrubber pump provided in one embodiment of the present application.

[0026] Figure 2 A waveform diagram of a reference signal in a method for controlling the water outlet flow of a floor scrubber pump provided in one embodiment of the present application.

[0027] Figure 3 A waveform diagram of a discontinuous PWM signal in a method for controlling the water outlet flow of a floor scrubber pump provided in one embodiment of the present application.

[0028] Figure 4 This is a structural block diagram of a device for controlling the water outlet flow of a floor scrubber pump provided in one embodiment of the present application. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "inner", "outer", "two ends", "both sides", "bottom", "top", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the elements referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, the terms "first", "second", "superior", "inferior", "primary", "secondary", etc. are used for descriptive purposes only and can be simply used to more clearly distinguish different components, but should not be understood as indicating or implying relative importance.

[0031] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, integral connections, mechanical connections, electrical connections, direct connections, indirect connections via an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0032] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0033] Example 1:

[0034] Reference Manual Figure 1 The embodiment of the present invention provides a method for controlling the water flow rate of a floor scrubber pump, which may specifically include the following steps:

[0035] S1: Get the expected value of the current water pump flow rate;

[0036] S2: Obtain a discontinuous PWM signal based on the expected value of the current water pump outlet flow rate. Each cycle of the discontinuous PWM signal includes n pulse signals with a period of T1 and a duty cycle of D and a low-level signal with a duration of T2, where n is a natural number not less than 1;

[0037] S3: Use the discontinuous PWM signal as a driving signal of the water pump to drive the water pump so that the water flow rate of the water pump meets the expected value.

[0038] A discontinuous PWM signal is a periodic signal. In an optional embodiment, when the number of pulse signals within a period of the discontinuous PWM signal is greater than one, all pulse signals within the period of the discontinuous PWM signal are continuous. Thus, when the number of pulse signals within each period of the discontinuous PWM signal is greater than one, the discontinuous PWM signal includes, in sequence, a pulse signal, ..., a pulse signal, and a low-level signal within a period of the discontinuous PWM signal.

[0039] In an optional embodiment, the method for obtaining a discontinuous PWM signal includes:

[0040] Obtain a predetermined reference signal, where the reference signal is a continuous PWM signal, the reference signal has a period of T1 and a duty cycle of D;

[0041] A low-level signal is added to the reference signal, and the duration of the low-level signal is recorded as T2 to obtain a discontinuous PWM signal. The period of the discontinuous PWM signal is nT1+T2, where n is a natural number not less than 1.

[0042] Reference Manual Figure 2 , shows a waveform diagram of a reference signal, the period of the reference signal is T1, the duty cycle is D, the reference signal can be obtained through experiments, and the reference signal can be obtained by batch testing the water output of the water pump.

[0043] In an optional embodiment, the method for determining the reference signal includes:

[0044] Take N water pumps of the same model, and record the optimal driving frequency of the water pump as F. The optimal driving frequency of the water pump is the factory value provided by the water pump manufacturer or supplier;

[0045] Set the expected water flow rate of the water pump to S;

[0046] Perform m drive tests on N water pumps, and record the average water flow rate Qi of the N water pumps in each drive test, where i = 1, 2, ..., m-1, m. In the m drive tests, the supply voltage, drive frequency, and drive time of the drive signal are the same, but the duty cycle is different. The drive frequency of the drive signal is the optimal drive frequency F of the water pump, and the duty cycle of the drive signal is recorded as Di, where i = 1, 2, ..., m-1, m, where m is a natural number not less than 2.

[0047] Calculate the absolute value of the difference between Qi and S, and take the Qi with the smallest absolute value of the difference between Qi and S. The corresponding Di is the duty cycle D of the reference signal, and the optimal driving frequency F of the water pump is equal to 1 / T1.

[0048] Specifically, N may be a natural number not less than 50, m may be a natural number not less than 10, and the units of S and Qi should be the same, which may be g / min.

[0049] Therefore, by performing a drive test on the water pump, a reference signal can be obtained, and the water output flow rate of the water pump can remain stable during the working time of the reference signal.

[0050] Reference Manual Figure 3 , shows a waveform diagram of a discontinuous PWM signal, where the period T1 and duty cycle D of the reference signal are fixed when the reference signal is determined. By selecting the appropriate number of pulse signals n and the low-level signal duration T2 within the discontinuous PWM signal period, the water output requirement of the floor scrubber pump can be met. The larger the number of pulse signals n, the greater the water output of the water pump, and the smaller the number of pulse signals n, the smaller the water output of the water pump. Figure 3 In this example, the value of n is 5.

[0051] Assume that the expected value of the water flow rate per minute of the current floor scrubber pump is A. When the pulse signal with a period of T1 and a duty cycle of D is working, the water flow rate per minute of the pump is B, B>A. When the low-level signal is working, the water flow rate of the pump is 0. Then, for the pulse signal, the water output in one cycle is B÷(60 / T1), the number of pulse signals n in the discontinuous PWM signal is 60*A / (B*T1), and the low-level duration T2=60(BA) / B.

[0052] In an optional embodiment, the low-level signal is added to the reference signal by controlling the switching of the high and low levels of the reference signal. In this case, the low-level signal added to the reference signal is equal to the low level in the reference signal.

[0053] The present application discloses a method for controlling the water outlet flow of a water pump for a floor scrubber. By using a discontinuous PWM signal as the driving signal of the water pump, the water outlet flow is maintained stable when the pulse signal is working. The water outlet flow of the water pump is satisfied by selecting the appropriate number of pulse cycles and the duration of the low-level signal. Without adding any additional hardware to the floor scrubber, the method can meet the precise control of the small water outlet flow of the water pump in any working scenario. The method improves the performance of the floor scrubber without increasing the hardware cost, making the working process of the floor scrubber more environmentally friendly and energy-saving.

[0054] Example 2:

[0055] Reference Manual Figure 4 An embodiment of the present invention provides a device for controlling the water flow rate of a floor scrubber pump. A method for controlling the water flow rate of a floor scrubber pump provided by any one of the above method embodiments may include:

[0056] The water output expected value acquisition module 11 is used to obtain the expected value of the current water output flow of the water pump;

[0057] The discontinuous PWM signal acquisition module 12 is used to obtain the discontinuous PWM signal according to the expected value of the current water pump outlet flow rate;

[0058] The driving module 13 is configured to use the obtained discontinuous PWM signal as a driving signal to drive the water pump so that the water flow rate of the water pump meets the expected value.

[0059] The present application discloses a device for controlling the water outlet flow of a floor scrubber pump. By using a discontinuous PWM signal as a driving signal for the water pump, no additional hardware needs to be added to the floor scrubber. This device can meet the precise control of a small water outlet flow of the water pump in any working scenario. This device improves the performance of the floor scrubber without increasing the hardware cost, making the working process of the floor scrubber more environmentally friendly and energy-saving.

[0060] Example 3:

[0061] An embodiment of the present invention provides a floor scrubber that executes any one of the methods for controlling the water flow rate of a floor scrubber pump in the method embodiments, the floor scrubber comprising:

[0062] One or more processors and memory.

[0063] The memory, as a non-volatile computer-readable storage medium, can be used to store non-volatile software programs, non-volatile computer-executable programs, and modules, such as the program instructions / modules corresponding to the method for controlling the water flow rate of a floor scrubber pump in the embodiments of this application. The processor executes the non-volatile software programs, instructions, and modules stored in the memory to execute various server functions and data processing, thereby implementing the method for controlling the water flow rate of a floor scrubber pump in the aforementioned method embodiment.

[0064] The memory may include a program storage area and a data storage area. The program storage area may store an operating system and application programs required for at least one function; the data storage area may store data generated based on the use of the device controlling the water flow rate of the floor scrubber pump. Furthermore, the memory may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state memory device. In some embodiments, the memory may optionally include a remote memory device relative to the processor. Such remote memory device may be connected to the device controlling the water flow rate of the floor scrubber pump via a network. Examples of such networks include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0065] One or more modules are stored in the memory, and when executed by one or more processors, the method for controlling the water outlet flow of the water pump of the floor scrubber in any of the above method embodiments is executed.

[0066] The above-mentioned product can execute the method provided in the embodiment of this application, and has the functional modules and beneficial effects corresponding to the execution method. For technical details not fully described in this embodiment, please refer to the method provided in the embodiment of this application.

[0067] Example 4:

[0068] Embodiment 4 of the present disclosure provides a computer-readable storage medium, in which one or more programs including execution instructions are stored. The execution instructions can be read and executed by a device (including but not limited to a computer, a server, or a network device, etc.) to execute the relevant steps in the above method embodiments.

[0069] It should be noted that the order of the embodiments described above is for illustrative purposes only and does not represent the superiority or inferiority of the embodiments. The above description is of specific embodiments of the specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps described in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order shown or the sequential order to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0070] The various embodiments in this specification are described in a progressive manner. Similar portions between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from the other embodiments. In particular, the embodiments of the apparatus, device, and storage medium are generally similar to the method embodiments, so their descriptions are relatively simple. For relevant portions, refer to the descriptions of the method embodiments.

[0071] Those skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware, or may be accomplished by a program instructing the relevant hardware, and the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a disk, or an optical disk, etc.

[0072] The above is only an optional implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A method for controlling the water flow rate of a floor scrubber pump, characterized in that: include: Get the expected value of the current water pump outlet flow; According to the expected value of the current water pump outlet flow, a discontinuous PWM signal is obtained, wherein each cycle of the discontinuous PWM signal includes n pulse signals with a period of T1 and a duty cycle of D and a low-level signal with a duration of T2, where n is a natural number not less than 1; The discontinuous PWM signal is used as the driving signal of the water pump to drive the water pump so that the water flow rate of the water pump meets the expected value; The method for obtaining a discontinuous PWM signal comprises: Obtain a predetermined reference signal, wherein the reference signal is a continuous PWM signal, the reference signal has a period of T1 and a duty cycle of D; A low-level signal is added to the reference signal, and the duration of the low-level signal is recorded as T2 to obtain a discontinuous PWM signal, wherein the period of the discontinuous PWM signal is nT1+T2, where n is a natural number not less than 1; The method for determining the reference signal includes: Take N water pumps of the same model, and record the optimal driving frequency of the water pump as F; Set the expected water flow rate of the water pump to S; Perform m drive tests on N water pumps, and record the average water flow rate Qi of the N water pumps in each drive test, where i = 1, 2, ..., m-1, m. In the m drive tests, the supply voltage, drive frequency, and drive time of the drive signal are the same, but the duty cycle is different. The drive frequency of the drive signal is the optimal drive frequency F of the water pump, and the duty cycle of the drive signal is recorded as Di, where i = 1, 2, ..., m-1, m, where m is a natural number not less than 2. Calculate the absolute value of the difference between Qi and S, and take the Qi with the smallest absolute value of the difference between Qi and S. The corresponding Di is the duty cycle D of the reference signal, and the optimal driving frequency F of the water pump is equal to 1 / T1.

2. A method for controlling the water flow rate of a floor scrubber pump according to claim 1, characterized in that: When the number of pulse signals in one cycle of the discontinuous PWM signal is greater than 1, all pulse signals in one cycle of the discontinuous PWM signal are continuous.

3. The method for controlling the water flow rate of a floor scrubber pump according to claim 1, characterized in that: Adding a low-level signal to the reference signal is achieved by controlling the switching of the high and low levels of the reference signal.

4. A device for controlling the water flow rate of a floor scrubber pump, applying the method for controlling the water flow rate of a floor scrubber pump according to any one of claims 1 to 3, characterized in that: include: The water output expected value acquisition module is used to obtain the expected value of the current water pump output flow rate; A discontinuous PWM signal acquisition module is used to obtain a discontinuous PWM signal according to the expected value of the current water pump outlet flow; The driving module is used to drive the water pump using the obtained discontinuous PWM signal as a driving signal so that the water flow rate of the water pump meets the expected value.

5. A floor scrubber, characterized in that: The floor scrubber includes a processor and a memory, wherein the memory stores at least one instruction, at least one program, a code set, or an instruction set, and the at least one instruction, the at least one program, or the instruction set is loaded and executed by the processor to implement a method for controlling the water outlet flow of a floor scrubber water pump as described in any one of claims 1 to 3.

6. A computer-readable storage medium, characterized in that The computer-readable storage medium stores at least one instruction, at least one program, a code set, or an instruction set, and the at least one instruction, the at least one program, the code set, or the instruction set is loaded and executed by the processor to implement a method for controlling the water outlet flow of a floor scrubber pump as described in any one of claims 1 to 3.

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