Spin control method of a washing machine and washing machine

Abstract

The embodiment of the application discloses a dehydration control method of a washing machine and the washing machine, and belongs to the technical field of washing machines. The dehydration control method comprises the following steps: obtaining a clothes attribute parameter before entering a dehydration stage; obtaining a drum collision parameter in the dehydration stage, and determining a target dehydration rotating speed of the washing machine according to the clothes attribute parameter and the drum collision parameter; and controlling the washing machine to dehydrate at the target dehydration rotating speed. The embodiment combines the clothes attribute parameter with the drum collision parameter to determine the target dehydration rotating speed, so that the dehydration noise can be effectively reduced, the dehydration success rate can be improved, and the user experience can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of washing machines, in particular, a dehydration control method of a washing machine and the washing machine. BACKGROUND

[0002] When the washing machine is dehydrating, the uneven distribution of the laundry load will cause eccentricity, which will cause the drum to hit the drum when rotating, resulting in a huge noise and even causing the washing machine to displace. In the prior art, the control of the dehydration speed only considers the influence of a single factor, such as the vibration of the drum. However, the reasons for dehydration imbalance are jointly affected by many factors, and the dehydration speed control precision of a single parameter is low, which will increase the number of dehydration attempts and prolong the dehydration time, thereby reducing the dehydration efficiency. SUMMARY

[0003] The dehydration control method of the washing machine provided in the embodiments of the present application at least solves the technical problem of increasing the number of dehydration attempts and reducing the dehydration efficiency by only considering a single factor to control the dehydration speed.

[0004] According to a first aspect of the embodiments of the present application, a dehydration control method of a washing machine is provided, and the dehydration control method comprises:

[0005] Before entering the dehydration stage, an attribute parameter of the laundry is acquired; the attribute parameter of the laundry comprises at least one of a weight of the laundry, a water absorption rate of the laundry and a water content rate of the laundry, the weight of the laundry is the weight of the laundry before entering the washing stage, and the water content rate of the laundry is the water content rate of the laundry before entering the dehydration stage;

[0006] In the dehydration stage, a drum hitting parameter is acquired, and a target dehydration speed of the washing machine is determined according to the attribute parameter of the laundry and the drum hitting parameter; the drum hitting parameter comprises at least one of a drum hitting frequency and a drum hitting amplitude;

[0007] The washing machine is controlled to dehydrate at the target dehydration speed.

[0008] By adopting the embodiments, the target dehydration speed is determined by combining the attribute parameter of the laundry with the drum hitting parameter, so that the dehydration noise can be effectively reduced, the dehydration success rate can be improved, and the user experience can be improved.

[0009] In an optional implementation manner of the embodiments of the present application in combination with the first aspect, the water absorption rate of the laundry is represented by the water inflow rate when the washing machine first inflows water;

[0010] And / or, the water content rate of the laundry is represented by the water drainage rate before entering the dehydration stage at the end of the water draining stage.

[0011] In an optional implementation of the first aspect, the target spin-drying speed of the washing machine is determined according to the laundry attribute parameter and the drum collision parameter.

[0012] The laundry parameter of the washing machine and the drum collision parameter are input into a pre-trained neural network model, and the target spin-drying speed is output by the neural network model.

[0013] In an optional implementation of the first aspect, the drum collision parameter is obtained by a buzzer-based drum collision detection circuit.

[0014] According to a second aspect of the present application, a washing machine is provided, which adopts the spin-drying control method of the first aspect of the present application.

[0015] In an optional implementation of the second aspect, the washing machine comprises a buzzer-based drum collision detection circuit, which comprises:

[0016] a buzzer module comprising a buzzer having a buzzer function, the buzzer being directly or indirectly subjected to vibration of a washing drum and generating a voltage signal based on the vibration of the washing drum;

[0017] a signal transmission module arranged between a voltage signal output end of the buzzer and a signal input end of a control module, and used at least for transmitting the voltage signal to the control module;

[0018] a control module electrically connected to a control end of the buzzer module, and capable of transmitting a vibration detection signal to the control end of the buzzer module to control the buzzer module to be in a state capable of generating the voltage signal, the control module determining whether drum collision occurs according to the voltage signal, and generating a drum collision parameter of the washing machine in the case of determining that drum collision occurs.

[0019] In an optional implementation of the second aspect, the signal transmission module is used to adjust the voltage signal during transmission of the voltage signal, and the adjustment comprises at least one of filtering and amplification.

[0020] In an optional implementation of the second aspect, the signal transmission module comprises a blocking capacitor and an amplifier.

[0021] a first end of the blocking capacitor is electrically connected to the voltage signal output end of the buzzer, and a second end of the blocking capacitor is electrically connected to a positive input end of the amplifier;

[0022] The inverting input end of the amplifier is connected with a resistor affecting the amplification multiple of the amplifier, and the output end of the amplifier is electrically connected with the signal input end of the control module.

[0023] With reference to the second aspect, in an optional implementation of the embodiments of the present application, the buzzer comprises a sound generating unit, the sound generating unit comprises piezoelectric material, the sound generating unit generates sound by using the inverse piezoelectric effect of the piezoelectric material, and the sound generating unit generates the voltage signal by using the direct piezoelectric effect of the piezoelectric material under the direct or indirect vibration of the washing drum.

[0024] With reference to the second aspect, in an optional implementation of the embodiments of the present application, the buzzer module further comprises a bias resistor and a triode, the triode and the bias resistor are connected in series in sequence along the current flow direction, and the buzzer is connected in parallel with the bias resistor.

[0025] The vibration detection signal is used to control the triode to be in a conducting state continuously.

[0026] When the control module controls the buzzer to realize the buzzer function, the control module transmits a pulse signal to the base of the triode, so that the triode is periodically turned on and turned off.

[0027] With reference to the second aspect, in an optional implementation of the embodiments of the present application, the control module is configured to:

[0028] The voltage signal transmitted by the signal transmission module is sampled and then normalized.

[0029] The interference signal in the normalized sampled signal is filtered.

[0030] The collision drum parameter is determined according to the filtered sampled signal.

[0031] With reference to the second aspect, in an optional implementation of the embodiments of the present application, the control module is further configured to:

[0032] Each continuous preset number of sampling signals is taken as a sampling group, and a root mean square calculation value of each sampling group is determined.

[0033] In a case where the root mean square calculation value is greater than a preset value, a collision drum signal is recorded.

[0034] The time interval between adjacent two collision drum signals is determined.

[0035] The collision drum amplitude is determined according to the root mean square calculation value, and the collision drum frequency is determined according to the time interval. BRIEF DESCRIPTION OF DRAWINGS

[0036] The above and other objects, features and advantages of the present disclosure will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings. The drawings described below are only some embodiments of the present disclosure, and other drawings can be obtained by those of ordinary skill in the art without creative labor based on these drawings.

[0037] Figure 1 is a structural schematic diagram of a washing machine provided by an embodiment of the present application.

[0038] Figure 2 is a dehydration flowchart of a washing machine provided by an embodiment of the present application.

[0039] Figure 3 is a dehydration flowchart of a washing machine of a specific example of the present application.

[0040] Figure 4 is a neural network classification model provided by an embodiment of the present application.

[0041] Figure 5 is a buzzer-based impact drum detection circuit diagram provided by an embodiment of the present application.

[0042] Figure 6 is a signal processing flowchart of an impact drum detection circuit provided by an embodiment of the present application.

[0043] The reference signs are as follows:

[0044] 1, function button; 2, display module; 3, buzzer; 4, washing drum; 5, cabinet. DETAILED DESCRIPTION

[0045] In order to enable persons skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor should be within the scope of protection of the present application.

[0046] It should be understood that the "multiple" mentioned herein refers to two or more. In the description of the embodiments of the present application, unless otherwise specified, " / " represents the meaning of or, for example, A / B can represent A or B; "and / or" herein only describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, A and B together, and B alone. In addition, in order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, "first", "second" and the like are used to distinguish the same items or similar items with basically the same function and role. The skilled in the art can understand that "first", "second" and the like do not limit the quantity and execution order, and "first", "second" and the like do not necessarily mean different.

[0047] In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0048] The embodiment proposes a dehydration control method of a washing machine. The type of the washing machine to which the dehydration control method of the embodiment is applied is not specifically limited, and can be a drum washing machine or a pulsator washing machine.

[0049] Taking a drum washing machine as an example, the structure of the washing machine refers to Figure 1 which includes a cabinet 5 and a washing drum 4 arranged in the cabinet 5. The front side of the cabinet 5 is provided with a laundry dropping opening corresponding to the drum opening of the washing drum 4. The laundry dropping opening is provided with a machine door which can open and close the laundry dropping opening. The upper side of the laundry dropping opening is provided with a function area, and the function area includes a function button 1 and a display module 2. A buzzer 3 is installed on the display module 2, and the display module 2 can also display the working state of the buzzer 3.

[0050] It should be noted that the above is only a specific example of the washing machine of the embodiment, and the structure of the washing machine to which the dehydration control method of the embodiment is applied is not limited to the above description, and therefore cannot limit the protection scope of the present application.

[0051] Referring to Figure 2 the dehydration flowchart, the dehydration control method includes the following steps:

[0052] S21, obtaining a laundry attribute parameter before entering the dehydration stage;

[0053] S22, obtaining a drum collision parameter in the dehydration stage, and determining a target dehydration rotating speed of the washing machine according to the laundry attribute parameter and the drum collision parameter;

[0054] S23, control the washing machine to spin at the target spin speed.

[0055] The embodiment needs to obtain the clothing attribute parameters in advance before the washing machine enters the spinning phase, wherein the clothing attribute parameters include at least one of clothing weight, clothing water absorption rate and clothing water content. The drum bumping parameters include one of drum bumping frequency and drum bumping amplitude. In the spinning phase, the clothing in the drum is distributed and the eccentricity value of the washing drum is lower than the preset eccentricity value, the drum is first spun at the preset spin speed, and the drum may be slightly bumped during the spinning process. At this time, the drum bumping parameters are obtained, and the drum bumping parameters are combined with the clothing attribute parameters to determine the target spin speed, and then the washing machine is controlled to spin at the target spin speed, so that the spinning noise can be effectively reduced and the spinning efficiency can be improved.

[0056] The clothing weight is the weight of the clothing in a dry state, for example, the clothing is weighed before entering the washing phase, and the dry clothing weight obtained by weighing at this time is the clothing weight. The clothing water absorption rate is the ability of the clothing to absorb water, and the clothing water content is the moisture degree or water content of the clothing. The clothing water content is the clothing water content before entering the spinning phase. It should be noted that the clothing water content referred to in the embodiment refers to the clothing water content before the end of the rinsing phase in the drum, and the rinsing water in the drum is drained to the preset minimum water level of the washing drum, and the clothing water content has not yet entered the spinning phase.

[0057] In actual application, the clothing water absorption rate can be represented by the water inlet rate when the washing machine first inlets water, and the water inlet rate is equal to the target water level / the water inlet time. In the case of the same water inlet water level, the longer the water inlet time, the smaller the water inlet rate, and the larger the clothing water absorption rate. Conversely, the shorter the water inlet time, the larger the water inlet rate, and the smaller the clothing water absorption rate. In the case of the same water inlet time, the smaller the water inlet water level, the smaller the water inlet rate, and the larger the clothing water absorption rate. Conversely, the larger the water inlet water level, the larger the water inlet rate, and the smaller the clothing water absorption rate. Therefore, the clothing water absorption rate can be represented by the water inlet rate when the washing machine first inlets water.

[0058] And / or, the clothing water content can be represented by the drainage rate before entering the spinning phase from the end of the water draining phase, and the drainage rate is equal to the pre-drainage water level / the drainage time. In the case of the same pre-drainage water level, the longer the drainage time, the smaller the drainage rate, and the smaller the clothing water content. Conversely, the shorter the drainage time, the larger the drainage rate, and the larger the clothing water content. In the case of the same drainage time, the higher the pre-drainage water level, the larger the drainage rate, and the larger the clothing water content. Conversely, the lower the pre-drainage water level, the smaller the drainage rate, and the smaller the clothing water content. Therefore, the clothing water content can be represented by the drainage rate before entering the spinning phase from the end of the water draining phase.

[0059] In this embodiment, the water in the clothes is separated by centrifugal force through the high-speed rotation of the washing drum during the dehydration of the washing machine. However, when the clothes are unevenly distributed in the washing drum, eccentricity will occur, causing the washing drum to rotate off the central axis and collide with the side wall of the washing machine box. Whether the drum will collide is related to the properties of the clothes, and in addition, the degree of collision when the drum collides is also related to the dehydration speed, acceleration (deceleration) speed control strategy. In order to more accurately control the dehydration speed, avoid frequent speed reduction when the drum collides slightly, and at the same time, when the drum collides greatly, the speed is also reduced in time to avoid further aggravation of the drum collision, therefore, in this embodiment, the dehydration speed is determined by combining the clothes property parameters and the drum collision parameters to improve the dehydration success rate and shorten the dehydration time.

[0060] In an optional implementation, the target dehydration speed of the washing machine is determined according to the clothes property parameters and the drum collision parameters, including: inputting the clothes parameters and the drum collision parameters of the washing machine into a pre-trained neural network model, and outputting the target dehydration speed through the neural network model.

[0061] Specifically, in combination with the dehydration flowchart of Figure 3 , after the clothes property parameters and the drum collision parameters are determined, the clothes property parameters such as the weight of the clothes, the water absorption rate of the clothes (which can be represented by the water inlet rate), and the water content rate of the clothes (which can be represented by the water outlet rate) are input into the input layer of the pre-trained neural network model, and finally the target dehydration speed is output by the output layer of the neural network model.

[0062] Since the size of the clothes eccentricity is related to the weight, water absorption rate, and water content rate of the clothes, and the setting of the dehydration speed is also related to the current vibration amplitude and vibration frequency, these parameters are selected as the characteristic parameters for determining the target dehydration speed. Since the setting of the target dehydration speed is affected by multiple factors, and the relationship between each influencing factor and the target dehydration speed has the characteristics of high complexity and nonlinearity, therefore, in this embodiment, a neural network classification learner is used to establish the relationship between the target dehydration speed and the characteristic parameters.

[0063] In an example, the pre-trained neural network model is as shown in Figure 4 , which is composed of an input layer, a fully connected layer, a ReLU activation function, a softmax activation function, and an output layer. The first fully connected layer of the neural network is connected to the input of the neural network, the fully connected layer multiplies the input by a weight matrix, and an activation function is connected after the fully connected layer, and the activation function selected here is ReLU, which sets negative numbers to zero, accelerates the convergence speed of the neural network, and simplifies the calculation. The final fully connected layer and the subsequent Softmax activation function produce the output target dehydration speed of the network, that is, the optimal dehydration speed. This neural network is trained by selecting data with high dehydration efficiency in the experimental test data as training data.

[0064] It should be noted that the "clothes" referred to in the embodiment refers to any item that can be processed in the washing machine, including but not limited to: clothes, bed sheets, duvet covers, dolls, pillowcases, etc.

[0065] In an alternative implementation, the drum parameter is obtained by a buzzer-based drum detection circuit.

[0066] The embodiment detects the drum parameter by using the original buzzer, thereby eliminating the need to install additional sensors and effectively reducing production costs. Specifically, the sound unit of the buzzer can be made of piezoelectric material, and the buzzer can sound by using the inverse piezoelectric effect of the piezoelectric material. In addition, the piezoelectric material can generate a voltage signal under the direct or indirect vibration of the washing drum by using the positive piezoelectric effect of the piezoelectric material. Finally, the voltage signal is analyzed and processed to obtain the drum parameter. In other alternative implementations, a vibration sensor, a distance sensor, a proximity switch, etc. can also be used to detect the drum parameter.

[0067] The embodiment also proposes a washing machine that uses the dehydration control method described above.

[0068] In an alternative implementation, the washing machine includes a buzzer-based drum detection circuit, which includes a buzzer module, a signal transmission module, and a control module.

[0069] Referring to Figure 5 The circuit diagram, the buzzer module includes a buzzer Buzzl with a buzzing function. The buzzer can be directly or indirectly subjected to the vibration of the washing drum and generate a voltage signal based on the vibration. In an example, the buzzer includes a sound unit, the sound unit includes piezoelectric material, the sound unit sounds by using the inverse piezoelectric effect of the piezoelectric material, and the sound unit generates a voltage signal under the direct or indirect vibration of the washing drum by using the positive piezoelectric effect of the piezoelectric material.

[0070] The signal transmission module is arranged between the voltage signal output end of the buzzer and the signal input end of the control module, and is at least used to transmit the voltage signal to the control module MCU.

[0071] The control module is electrically connected with the control end of the buzzer module, which can transmit a vibration detection signal to the control end of the buzzer module to control the buzzer module to be in a state capable of generating a voltage signal. The control module determines whether a drum collision occurs according to the voltage signal, and generates a drum collision parameter of the washing machine in the case of determining that a drum collision occurs. The control module can also transmit a buzzer function signal to the control end of the buzzer module to control the buzzer module to be in a state capable of making the buzzer produce buzzing.

[0072] In an alternative implementation, referring to Figure 5The signal transmission module is configured to adjust the voltage signal during transmission, and the adjustment includes at least one of filtering and amplification. In an example, the signal transmission module includes a blocking capacitor C1 and an amplifier OP, a first end of the blocking capacitor is electrically connected to the voltage signal output end of the buzzer, and a second end of the blocking capacitor is electrically connected to a positive input end of the amplifier. The blocking capacitor C1 is configured to filter out a direct current voltage signal in the voltage signal and retain an alternating current voltage signal. The voltage signal is transmitted to the control module after being amplified by the amplifier. The reverse input end of the amplifier is connected to resistors R4 and R5 that affect the amplification factor of the amplifier, and the output end of the amplifier is electrically connected to the signal input end of the control module.

[0073] In an optional implementation, the buzzer module further includes a bias resistor R2 and a triode Q1, the triode and the bias resistor are connected in series in sequence along a current flow direction, and the buzzer is connected in parallel with the bias resistor. The vibration detection signal is configured to control the triode to be continuously turned on, and the control module transmits a pulse signal to a base of the triode to periodically turn on and turn off the triode when controlling the buzzer to realize the buzzing function.

[0074] The buzzer-based vibration detection circuit is described below in combination with specific examples.

[0075] The barrel detection circuit is as shown in Figure 5 The solid line circuit corresponds to the buzzer module, and the dashed line circuit corresponds to the signal transmission module.

[0076] When the buzzer Buzz1 works, the triode Q1 is turned on and turned off by the I / O port of the control module MCU to make the buzzer Buzz1 sound, and the frequency of the sound is controlled by the frequency of the square wave emitted by the I / O pin. VCC is the power supply of the buzzer, R1 and R3 are current limiting resistors, and R2 is a bias resistor.

[0077] The buzzer sound unit is made of piezoelectric material, and its principle is based on the inverse piezoelectric effect of piezoelectric material. When the material is subjected to alternating voltage, it deforms and generates vibration. Similarly, the piezoelectric material in the buzzer sound unit also has a positive piezoelectric effect, that is, when external vibration acts on the material, a voltage signal is generated. By using this characteristic of the buzzer, the buzzer can be expanded into a barrel detection sensor to detect the occurrence of the washing machine barrel. When the barrel hits, the washing barrel collides with the side wall of the box body, and the vibration signal is transmitted to the buzzer module along the box body structure.

[0078] When the buzzer works as a baffle detection sensor, the I / O output is high level, the transistor Q1 is long-pass, and the voltage on the resistor R2 is equal to the direct current bias voltage U1 on the R2 plus the alternating voltage Uac generated by the buzzer under vibration. The voltage signal passes through a stabilizing diode D1, which prevents the generated voltage from being too high to damage the microcontroller MCU, and then passes through a direct current capacitor C1 to remove the direct current bias voltage U1 and only retain the vibration alternating voltage signal Uac input to the amplifier OP. The amplification factor of the amplifier is adjusted by resistors R4 and R5. The amplified vibration alternating voltage signal is transmitted to the control module MCU. After the control module MCU detects and analyzes the voltage signal generated by the piezoelectric material of the buzzer, the baffle parameter is obtained.

[0079] In an optional implementation, the control module is configured to:

[0080] sampling and normalizing the voltage signal transmitted by the signal transmission module;

[0081] filtering the interference signal in the normalized sampling signal;

[0082] determining the baffle parameter according to the filtered sampling signal.

[0083] Specifically, the amplified vibration alternating voltage signal is sampled by the analog-to-digital converter ADC of the control module, and the digital signal obtained by sampling is processed by the signal processing module to obtain the baffle parameter. Referring to the signal processing flow of Figure 6 , the sampling signal is first normalized to the interval [0, 1] to facilitate subsequent processing. Then input the low-pass filter module to filter out the high-frequency interference signal in the signal, and the calculation formula of the low-pass filter is "y(t)=y(t-1)+alpha[x(t)-y(t-1)]", y(t) is the filtered signal, y(t-1) is the previous value of the filtered signal, x(t) is the current input signal, and alpha is the filter coefficient. The filter coefficient is calculated from the cutoff frequency and the sampling period, where: alpha=(2*π*fc*Ts) / (2*π*fc*Ts+1), fc is the cutoff frequency, which is 70Hz~300Hz, and Ts is the sampling period, which is 1kHZ~2kHz. The low-pass filtered signal is input to the baffle parameter determination module of the control module, and the baffle parameter is determined according to the filtered sampling signal.

[0084] In an optional implementation, the control module is further configured to:

[0085] determining the root mean square calculation value of each sampling group by taking each continuous preset number of sampling signals as a sampling group;

[0086] In the case that the root mean square calculation value is greater than the preset value, a bouncer signal is recorded;

[0087] The time interval between two adjacent bouncer signals is determined;

[0088] The bouncer amplitude is determined according to the root mean square calculation value, and the bouncer frequency is determined according to the time interval.

[0089] Specifically, continuing to refer to the signal processing flowchart of Figure 6 , first, every continuous preset number of sampling signals is taken as a sampling group, for example, 10-30 continuous signals are taken as a sampling group, and the root mean square calculation value V RMS of the group of signals is calculated, the size between V RMS and the preset value V1 is compared, if V RMS >V1, it is considered to meet the bouncer signal characteristics, and is recorded as a bouncer signal V RMS (n). At the same time, the time interval between two adjacent bouncer signals V RMS (n) and V RMS (n+1) is calculated, and the bouncer frequency is calculated according to the time interval, and the bouncer frequency is the time interval between two adjacent bouncer signals, and the bouncer amplitude is the root mean square calculation value.

[0090] The embodiment detects whether the washing drum bounces by using the existing buzzer circuit on the washing machine, without the need to install an additional sensor, and reduces the production cost while ensuring the accuracy of the bouncer parameter detection result.

[0091] The sequence of the embodiments or the introduction provided in the present application is only for description, and does not represent the advantages or disadvantages of the embodiments.

[0092] In the several embodiments provided by the present application, it should be understood that the disclosed technology can be implemented in other ways. Of course, the unit described as the division is only a logic function division, and there can be other division ways in actual implementation, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, unit or module, and can be electrical or other forms.

[0093] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on multiple units. According to actual needs, part or all of the units can be selected to achieve the purpose of the embodiment scheme.

[0094] In addition, each functional unit in each of the embodiments of the present application can be integrated in one processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0095] In the above embodiments, all or part of the embodiments can be realized by software, hardware, firmware or any combination thereof. When realized by software, all or part of the embodiments can be realized in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network or other programmable devices. The computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center through wired (for example: coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (for example: infrared, wireless, microwave, etc.) mode. The computer readable storage medium can be any available medium that can be accessed by a computer, or a data storage device such as a server, data center, etc. integrated with one or more available media. The available media can be magnetic media (for example: floppy disk, hard disk, magnetic tape), optical media (for example: digital versatile disc (DVD)) or semiconductor media (for example: solid state disk (SSD)) and the like. It should be noted that the computer readable storage medium mentioned in the embodiments of the present application can be a non-volatile storage medium, in other words, it can be a non-transitory storage medium.

[0096] It should be noted that the information (including but not limited to user equipment information, user personal information, etc.), data (including but not limited to data for analysis, stored data, displayed data, etc.) and signals involved in the embodiments of the present application are all authorized by the user or fully authorized by all parties, and the collection, use and processing of related data need to comply with relevant laws, regulations and standards of relevant countries and regions. For example, the scene data of the current frame in the three-dimensional virtual scene, the device information of the client and the scene interaction information involved in the embodiments of the present application are all obtained under sufficient authorization.

[0097] The above merely describes the preferred embodiments of the present application, and it should be pointed out that, for those skilled in the art, some improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A method for controlling the spin-drying process of a washing machine, characterized in that, The dehydration control method includes: Before entering the dehydration stage, the clothing attribute parameters are obtained; the clothing attribute parameters include clothing weight, clothing water absorption rate and clothing moisture content, the clothing weight is the weight of the clothing before entering the washing stage, and the clothing moisture content is the moisture content of the clothing before entering the dehydration stage. During the spin-drying stage, the drum impact parameters are acquired, and the target spin-drying speed of the washing machine is determined based on the clothing attribute parameters and the drum impact parameters; the drum impact parameters include the drum impact frequency and the drum impact amplitude. Control the washing machine to spin-dry at the target spin speed; Determining the target spin speed of the washing machine based on the clothing attribute parameters and the drum impact parameters includes: The washing machine's clothing attribute parameters and the drum impact parameters are input into a pre-trained neural network model, which then outputs the target spin speed.

2. The spin-drying control method for a washing machine according to claim 1, characterized in that, The water absorption rate of the clothes is characterized by the water intake rate during the first water intake of the washing machine; And / or, the moisture content of the garment is characterized by the drainage rate before entering the dehydration stage at the end of the rinsing stage.

3. The spin-drying control method for a washing machine according to claim 1 or 2, characterized in that, The parameters of the impact tube are obtained by a buzzer-based impact tube detection circuit.

4. A washing machine, characterized in that, The washing machine uses the dehydration control method described in any one of claims 1-3.

5. The washing machine according to claim 4, characterized in that, The washing machine includes a buzzer-based drum collision detection circuit, the drum collision detection circuit comprising: A buzzer module, comprising a buzzer with a buzzing function, wherein the buzzer can be directly or indirectly subjected to the vibration of the washing tub and generate a voltage signal based on the vibration of the washing tub; A signal transmission module is disposed between the voltage signal output terminal of the buzzer and the signal input terminal of the control module, and is used at least to transmit the voltage signal to the control module; The control module is electrically connected to the control terminal of the buzzer module. It can transmit vibration detection signals to the control terminal of the buzzer module to control the buzzer module to be in a state that can generate the voltage signal. The control module determines whether a drum collision occurs based on the voltage signal, and generates drum collision parameters of the washing machine if a drum collision is determined to have occurred.

6. The washing machine according to claim 5, characterized in that, The signal transmission module is used to adjust the voltage signal during the transmission of the voltage signal, and the adjustment includes at least one of filtering and amplification.

7. The washing machine according to claim 5, characterized in that, The signal transmission module includes a DC blocking capacitor and an amplifier; The first end of the DC blocking capacitor is electrically connected to the voltage signal output terminal of the buzzer, and the second end of the DC blocking capacitor is electrically connected to the positive input terminal of the amplifier. The amplifier's inverting input terminal is connected to a resistor that affects the amplifier's amplification factor, and the amplifier's output terminal is electrically connected to the signal input terminal of the control module.

8. The washing machine according to claim 5, characterized in that, The buzzer includes a sound-generating unit, which includes a piezoelectric material. The sound-generating unit generates sound using the inverse piezoelectric effect of the piezoelectric material, and generates the voltage signal using the direct piezoelectric effect of the piezoelectric material under the direct or indirect vibration of the washing drum.

9. The washing machine according to claim 5, characterized in that, The buzzer module also includes a bias resistor and a transistor, the transistor and the bias resistor are connected in series along the current flow direction, and the buzzer is connected in parallel with the bias resistor; The vibration detection signal is used to control the transistor to remain in the conducting state. When the control module controls the buzzer to perform the buzzing function, it transmits a pulse signal to the base of the transistor to make the transistor periodically turn on and off.

10. The washing machine according to claim 5, characterized in that, The control module is configured as follows: The voltage signal transmitted by the signal transmission module is sampled and then normalized. Interference signals in the normalized sampled signals are filtered out. The parameters of the impactor are determined based on the filtered sampled signal.

11. The washing machine according to claim 10, characterized in that, The control module is also configured to: Each consecutive preset number of sampled signals is taken as a sampling group, and the root mean square value of each sampling group is determined. If the calculated root mean square value is greater than a preset value, a collision signal is recorded. Determine the time interval between two adjacent striking tube signals; The impact amplitude is determined based on the root mean square value, and the impact frequency is determined based on the time interval.

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