CN112011957A - Washing machine, eccentricity detection method and device thereof, and storage medium - Google Patents
Washing machine, eccentricity detection method and device thereof, and storage medium Download PDFInfo
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00
- D06F39/08—Liquid supply or discharge arrangements
- D06F39/087—Water level measuring or regulating devices
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Abstract
The embodiment of the application discloses a washing machine and an eccentricity detection method, a device and a storage medium thereof, wherein the method comprises the following steps: acquiring a frequency signal corresponding to water level fluctuation corresponding to the condition that the water amount in the water containing barrel accords with a set water amount range and the rotating speed of the inner barrel accords with a set rotating speed range; determining an amplitude value corresponding to the water level fluctuation through frequency domain transformation based on the frequency signal, and determining a characteristic value corresponding to the eccentricity based on the amplitude value; and determining the corresponding eccentricity of the washing machine according to the corresponding relation between the characteristic value and the set characteristic value interval. The eccentricity is detected by acquiring the frequency signal corresponding to the fluctuation of the water level, the hardware cost is not required to be increased, and the manufacturing cost is reduced.
Description
Technical Field
The application relates to the field of washing machine detection, in particular to a washing machine and an eccentricity detection method, device and storage medium thereof.
Background
The washing machine often needs to detect the water level during the washing process, and a water level sensor is generally disposed on the washing machine to measure the water level in the tub. In the washing and dewatering process of the washing machine, especially in the dewatering process, due to uneven distribution of clothes, when the rotating speed of the motor reaches a high speed, the state of the washing machine is unbalanced, large vibration is generated, and further, the effect that the inner cylinder impacts the box body and even the washing machine is displaced is caused. Therefore, it is necessary to detect the eccentricity of the washing machine during the dehydration process so as to control the washing machine to stop running in time according to actual conditions to prevent damage to the washing machine. In the known eccentricity detection scheme, additional sensor detection units, such as an acceleration sensor and a gyroscope, are generally required to be arranged for detection, but the additional sensor detection units cause direct increase of material cost, additional installation space causes additional processing time and labor cost, and hardware of a main control circuit matched with the additional sensor detection units also needs to be changed.
Disclosure of Invention
In view of this, embodiments of the present application provide a washing machine, an eccentricity detection method and apparatus thereof, and a storage medium, which aim to achieve accurate detection of the eccentricity of the washing machine without increasing hardware cost.
The technical scheme of the embodiment of the application is realized as follows:
in a first aspect, an embodiment of the present application provides a method for detecting an eccentricity of a washing machine, which is applied to a washing machine including a tub and an inner drum located in the tub, and includes:
acquiring a frequency signal corresponding to water level fluctuation corresponding to the fact that the water amount in the water containing barrel accords with a set water amount range and the rotating speed of the inner barrel accords with a set rotating speed range;
determining an amplitude value corresponding to water level fluctuation through frequency domain transformation based on the frequency signal, and determining a characteristic value corresponding to the eccentricity amount based on the amplitude value;
and determining the corresponding eccentricity of the washing machine according to the corresponding relation between the characteristic value and the set characteristic value interval.
In a second aspect, an embodiment of the present application provides an eccentricity detection apparatus for a washing machine, including:
a memory for storing an executable program;
and the processor is connected with the pressure detection device and is used for realizing the washing machine eccentricity detection method in the embodiment when the executable program stored in the memory is executed.
In a third aspect, an embodiment of the present application provides a computer storage medium storing an executable program, which when executed by a processor, implements the method for detecting an eccentricity amount of a washing machine according to the foregoing embodiment.
In a fourth aspect, an embodiment of the present application provides a washing machine, which includes a water tub, an inner drum located in the water tub, and an air chamber communicated with the water tub, wherein the washing machine is provided with the washing machine eccentricity detection apparatus according to the foregoing embodiment.
In the technical scheme provided by the embodiment of the application, a frequency signal corresponding to water level fluctuation is acquired corresponding to the condition that the water amount in the water containing barrel accords with a set water amount range and the rotating speed of the inner barrel accords with a set rotating speed range; determining an amplitude value corresponding to water level fluctuation through frequency domain transformation based on the frequency signal, and determining a characteristic value corresponding to the eccentricity amount based on the amplitude value; according to the corresponding relation between the characteristic value and the set characteristic value interval, the corresponding eccentricity of the washing machine is determined, the frequency signal which is output by the water level sensor and corresponds to the fluctuation of the water level can be used for detecting the eccentricity, the hardware cost is not required to be increased, and the manufacturing cost is reduced.
Drawings
FIG. 1 is a schematic flow chart illustrating a method for detecting an eccentricity of a washing machine according to an embodiment of the present disclosure;
FIG. 2 is a schematic flow chart illustrating a method for detecting an eccentricity of a washing machine according to another embodiment of the present application;
fig. 3A to 3D are schematic diagrams illustrating experimental results of frequency signals and characteristic values corresponding to different levels of eccentricity in an embodiment of the present application;
FIG. 4 is a schematic structural diagram of an eccentricity detection apparatus of a washing machine according to an embodiment of the present application;
FIG. 5 is a schematic structural diagram of a washing machine according to an embodiment of the present application;
fig. 6 is a schematic structural view illustrating an air chamber provided on a tub in an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of a water level detection sensor according to an embodiment of the present application.
Detailed Description
The technical solution of the present application is further described in detail with reference to the drawings and specific embodiments of the specification. It should be understood that the examples provided herein are merely illustrative of the present application and are not intended to limit the present application. In addition, the following examples are provided as partial examples for implementing the present application, not all examples for implementing the present application, and the technical solutions described in the examples of the present application may be implemented in any combination without conflict.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The embodiment of the application provides an eccentricity detection method of a washing machine, which is applied to the washing machine comprising a water bucket and an inner cylinder positioned in the water bucket, wherein the water bucket is used for storing washing water, the inner cylinder is rotatably installed in the water bucket to store clothes in the water bucket, and the inner cylinder can rotate under the driving of a driving unit to wash the clothes in the inner cylinder. Referring to fig. 1, the method for detecting the eccentricity of the present embodiment includes:
in this embodiment, it is first determined that the water amount in the tub meets a set water amount range, and the set water amount range may be set according to differences between different types of washing machine models.
In one embodiment, the amount of water in the tub is detected, and the tub is controlled to be filled with or drained of water in response to the amount of water not meeting the set water amount range. For example, before the washing machine enters the spin-drying process, it may be detected whether the water amount in the water tub conforms to the set water amount range corresponding to the spin-drying process, and if not, the water inlet valve may be controlled to feed water or the water discharge valve may be controlled to discharge water, so that the water amount in the water tub conforms to the set water amount range. The set water amount range may be a numerical value or a range value. For example, the set water amount range of a certain washing machine dehydration program can be 3L or 2.95-3.05L.
After the water quantity in the water containing barrel is determined to be in accordance with the set water quantity range, the inner barrel of the washing machine is controlled to rotate, whether the rotating speed of the inner barrel is in accordance with the set rotating speed range or not is judged, the value of the set rotating speed range is determined according to calibration data in a preset test, and the set rotating speed range can be a point value or a range value. For example, taking 200rpm as an example, it is determined that the inner cylinder is in a rotation speed state of 200rpm, and a frequency signal corresponding to the water level fluctuation is obtained. In an embodiment, the water level detection sensor outputs a frequency signal corresponding to water level fluctuation, for example, a main controller of the washing machine can collect the frequency signal with set duration output by the water level detection sensor.
102, determining an amplitude value corresponding to water level fluctuation through frequency domain transformation based on the frequency signal, and determining a characteristic value corresponding to the eccentricity based on the amplitude value;
in an embodiment, the main controller performs Fast Fourier Transform (FFT) on the received frequency signal to obtain a corresponding frequency domain result, and selects the maximum amplitude value in the frequency domain as the characteristic value corresponding to the eccentricity amount according to the frequency domain result.
And 103, determining the corresponding eccentricity of the washing machine according to the corresponding relation between the characteristic value and the set characteristic value interval.
The main controller determines the corresponding eccentricity of the washing machine according to the corresponding relation between the characteristic value and the set characteristic value interval, so that the eccentricity detection of the washing machine is realized on the basis of the water level detection sensor on the basis of not increasing a hardware sensor.
In this embodiment, a plurality of characteristic value intervals corresponding to different levels of eccentricity are predefined, the main controller compares the characteristic values with the plurality of characteristic value intervals corresponding to different eccentricities, and the eccentricity corresponding to the washing machine is determined according to the characteristic value intervals corresponding to the characteristic values.
In the method for detecting the eccentricity of the washing machine, a frequency signal corresponding to water level fluctuation is acquired corresponding to the condition that the water amount in the water containing barrel accords with a set water amount range and the rotating speed of the inner barrel accords with a set rotating speed range; determining an amplitude value corresponding to water level fluctuation through frequency domain transformation based on the frequency signal, and determining a characteristic value corresponding to the eccentricity amount based on the amplitude value; according to the corresponding relation between the characteristic value and the set characteristic value interval, the corresponding eccentricity of the washing machine is determined, the frequency signal which is output by the water level sensor and corresponds to the fluctuation of the water level can be used for detecting the eccentricity, the hardware cost is not required to be increased, and the manufacturing cost is reduced.
In some embodiments, optionally, in order to improve the accuracy of the eccentricity amount detection, the acquired frequency signals include more than two groups; the determining the amplitude value corresponding to the water level fluctuation through frequency domain transformation based on the frequency signal and the determining the characteristic value corresponding to the eccentricity based on the amplitude value comprises the following steps: carrying out frequency domain transformation on each group of frequency signals, and selecting the maximum amplitude value corresponding to each group of frequency signals after frequency domain transformation; the maximum amplitude value determined based on each set of frequency signals is subjected to weighted calculation to determine a characteristic value corresponding to the eccentricity amount. For example, an average value of the sum of each group of maximum amplitude values may be obtained as the characteristic value, so that the characteristic value corresponding to the eccentricity amount may be determined by using the amplitude values of the multiple groups of frequency signals after frequency domain transformation, which is beneficial to improving the detection accuracy.
In some embodiments, the control strategy of the washing machine may be adjusted based on the detected eccentricity, specifically, the washing machine is controlled to dewater corresponding to the eccentricity of the washing machine being less than or equal to a first threshold; and controlling the washing machine to stop rotating corresponding to the eccentricity of the washing machine greater than a second threshold value, wherein the second threshold value is greater than the first threshold value. Therefore, the severe vibration and displacement of the washing machine caused by the continuous operation of the washing machine when the eccentric amount of the washing machine exceeds the second threshold value are effectively avoided, and the service life of the washing machine is prolonged.
Fig. 2 is a schematic flow chart illustrating a method for detecting an eccentricity of a washing machine according to another embodiment, referring to fig. 2, the method for detecting an eccentricity of a washing machine may include:
illustratively, the preset water amount range of the washing machine is 3L, the main controller determines whether the water amount in the water tub is 3L, if not, step 202 is executed, and if so, step 203 is executed.
the main controller controls the water bucket to feed water by driving the water inlet valve when determining that the water amount is smaller than the preset water amount range according to the comparison result of the acquired water amount value and the preset water amount range; and when the water amount is determined to be larger than the preset water amount range, controlling the water containing barrel to drain water by driving the drain valve.
the main controller controls the inner barrel to run to a set rotating speed through the driving unit.
and (5) determining that the time for the inner cylinder to run to the set rotating speed reaches the set time, executing step 205, otherwise, continuously monitoring the running time, thus ensuring the stable running of the inner cylinder and improving the reliability of detection. For example, the set time period may be 5S.
the main control board receives a frequency signal corresponding to water level fluctuation generated by the water level detection sensor, and illustratively, receives a group of frequency signals corresponding to a first set time length to form the first frequency signal.
performing FFT on the first frequency signal to obtain a result matrix a1 corresponding to the frequency domain, and selecting the largest amplitude value as the first amplitude value based on the result matrix a 1.
the main control board receives a frequency signal corresponding to water level fluctuation generated by the water level detection sensor, and illustratively, receives a group of frequency signals corresponding to a second set time length to form the second frequency signal.
and performing FFT on the second frequency signal to obtain a result matrix B1 corresponding to the frequency domain, and selecting the maximum amplitude value as the second amplitude value based on the result matrix B1.
and calculating the average value of the first amplitude value and the second amplitude value as the characteristic value.
a plurality of characteristic value intervals corresponding to different levels of eccentricity are predefined, the main controller compares the characteristic values with a plurality of characteristic value intervals corresponding to different eccentricities respectively, and the eccentricity corresponding to the washing machine is determined according to the characteristic value intervals corresponding to the characteristic values.
Illustratively, the predefined different levels of eccentricity include: 1KG, 1.2KG, 1.4KG, 1.6KG, wherein, the eigenvalue interval that 1KG corresponds is [32000,3300], the eigenvalue interval that 1.2KG corresponds is [35000,3600], the eigenvalue interval that 1.4KG corresponds is [53500,55000], the eigenvalue interval that 1.6KG corresponds is [55500,57000 ]. As shown in fig. 3A to 3D, schematic diagrams of experimental results of frequency signals and characteristic values corresponding to different levels of eccentricity are shown, wherein in fig. 3A, the detected characteristic value is 32500, so the experimental result corresponds to 1KG of eccentricity; in FIG. 3B, the detected characteristic value is 35530, so the experimental result corresponds to an eccentric amount of 1.2 KG; in FIG. 3C, the detected characteristic value is 54340, so the experimental result corresponds to an eccentric amount of 1.4 KG; in FIG. 3D, the detected characteristic value is 56820, so the experimental result corresponds to an eccentric amount of 1.6 KG.
And step 211, adjusting and controlling the washing machine based on the eccentricity.
Specifically, the washing machine is controlled to dewater corresponding to the eccentricity amount of the washing machine which is less than or equal to a first threshold value; and controlling the washing machine to stop rotating corresponding to the eccentricity of the washing machine greater than a second threshold value, wherein the second threshold value is greater than the first threshold value.
In this embodiment, optionally, for different levels of eccentricity, the maximum rotation speed of the washing machine at that level of eccentricity may be controlled. Illustratively, when the eccentricity of the washing machine is greater than 1.6KG, the inner drum is controlled to stop rotating, so as to effectively avoid the phenomenon that the washing machine vibrates violently and displaces greatly.
The embodiment of the application also provides an eccentricity detection device which can be a main controller of the washing machine. Fig. 4 shows only an exemplary structure of the eccentricity amount detecting device, not the entire structure, and a part of or the entire structure shown in fig. 4 may be implemented as necessary.
The eccentricity amount detection device 400 provided in the embodiment of the present application includes: at least one processor 401, memory 402, a user interface 403, and at least one communication interface 404. The various components of the eccentricity detection device 400 are coupled together by a bus system 405. It will be appreciated that the bus system 405 is used to enable communications among the components. The bus system 405 includes a power bus, a control bus, and a status signal bus in addition to a data bus. For clarity of illustration, however, the various buses are labeled as bus system 405 in fig. 4.
The user interface 403 may include, among other things, a display, a keyboard, a mouse, a trackball, a click wheel, a key, a button, a touch pad, or a touch screen.
It will be appreciated that the memory 402 can be either volatile memory or nonvolatile memory, and can include both volatile and nonvolatile memory.
The memory 402 in the embodiment of the present application is used to store various types of data to support the execution of the eccentricity amount detection method. Examples of such data include: any executable program for running on the eccentricity amount detection device 400, such as the executable program 4021, and a program that implements the eccentricity amount detection method of the embodiment of the present application may be included in the executable program 4021.
The eccentricity amount detection method disclosed in the embodiment of the present application may be applied to the processor 401, or implemented by the processor 401. The processor 401 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the eccentricity detection method may be implemented by hardware integrated logic circuits or instructions in software in the processor 401. The Processor 401 described above may be a general purpose Processor, a Digital Signal Processor (DSP), or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. Processor 401 may implement or perform the methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules may be located in a storage medium located in the memory 402, and the processor 401 reads the information in the memory 402, and completes the steps of the eccentricity amount detection method provided in the embodiments of the present application in combination with the hardware thereof.
An embodiment of the present application further provides a readable storage medium, where the storage medium may include: various media that can store program codes, such as a removable Memory device, a Random Access Memory (RAM), a Read-Only Memory (ROM), a magnetic disk, and an optical disk. The readable storage medium stores an executable program; the executable program is used for realizing the eccentricity amount detection method in any embodiment of the application when being executed by a processor.
Referring to fig. 5, the washing machine includes a cabinet 501, a tub 502, an inner tub 503, an air chamber 504, a motor 505, a suspension spring 506, an air duct 507, and a water level detection sensor 508. The tub 502 is disposed in the cabinet 501, the tub 502 is supported by a suspension spring 506, the inner tub 503 is disposed in the tub 502, the motor 505 drives the inner tub 503 to rotate to drive the laundry in the inner tub 503 to be washed, the air chamber 504 communicates with the tub 502 to change the water level in the air chamber 504 according to the change of the water level in the tub 502, and the water level detection sensor 508 communicates with the air chamber 504 through an air duct 507 to generate a frequency signal corresponding to the fluctuation of the water level according to the pressure change in the air chamber 504. In this embodiment, a main controller 509 is further included, and the main controller 509 is electrically connected to the water level detection sensor 508 to receive the frequency signal corresponding to the water level fluctuation output by the water level detection sensor 508. The main controller 509 may perform the eccentricity amount detection method of the foregoing embodiment. In this embodiment, the main controller 509 may determine the water level of the tub according to the corresponding relationship between the frequency value of the frequency signal output by the water level detection sensor 608 and the water level of the tub, and may also determine the eccentricity of the washing machine by using the eccentricity detection method of the foregoing embodiment. In this way, the detection of the water level height and the eccentricity amount can be achieved based on the water level detection sensor 508.
Alternatively, referring to fig. 6, the air compartment 504 is disposed at an outer sidewall of the tub 502 near a bottom end, and the tub 502 is provided with an opening 5021 communicating with the air compartment 504. The upper part of the air chamber 504 is connected to a water level detection sensor 508 via an air duct 507. The water 5022 in the tub 502 is not higher in water level than the bottom of the inner tub 503 corresponding to the dehydration process, so that the laundry in the inner tub 503 is not wetted, the water 5022 in the tub may flow into the air chamber 504 through the opening 5021, and the water level fluctuation w in the air chamber 504 may be caused when the tub 502 is vibrated or shaken. This water level fluctuation w is communicated with a water level detection sensor 508 via an air duct 507, so that a frequency signal corresponding to the water level fluctuation can be output via the water level detection sensor 508.
Referring to fig. 7, in the present embodiment, the water level detecting sensor includes: shell, pressure measurement. The housing includes a first housing 701, a second housing 702, and a sealing member 703 disposed between the first housing 701 and the second housing 702. The sealing member 703 may be a rubber film having good air tightness, so as to seal the air between the first housing 701 and the second housing 702. The first housing 701 is provided with an air vent 7011 communicating with the interior thereof, and the second housing 702 is provided with an air vent for communicating with the outside atmospheric pressure. The pressure detection device is positioned in the shell and comprises an air tap 704 and a detection unit 705, the air tap 704 is communicated with an air chamber 504 of the washing machine, the detection unit 705 senses pressure change in the air chamber 504 caused by water level fluctuation, and outputs a frequency signal corresponding to the water level fluctuation to the eccentricity detection device.
The detection unit 705 is located in the second housing 702, the detection unit 705 includes a pressure sensitive film 7051 and a measurement circuit board 7052, an opening 7031 hermetically matched with the air nozzle 704 is formed in the sealing element 703, the pressure sensitive film 7051 penetrates the opening 7031 through the air nozzle 704 to be communicated with the air vent 7011, and the measurement circuit board 7052 is configured to sense deformation of the pressure sensitive film 7051 to output a frequency signal. The pressure-sensitive film 7051 may be a silicon film.
In this embodiment, the detecting unit 705 is implemented based on a Micro-Electro-Mechanical System (MEMS) technology, the pressure sensitive film 7051 is communicated with the air guide hole 7011 through the air nozzle 704, and the air pressure in the air chamber 504 is sequentially transmitted to one side of the pressure sensitive film 7051 through the air guide tube 507, the air guide hole 7011, and the air nozzle 704, and because the first housing 701 and the second housing 702 are sealed by the sealing member 703 and the air nozzle 704 is sealed with the opening 7031 of the sealing member 703, such a structure ensures that an air pressure difference is formed on both sides of the pressure sensitive film 7051, so that the pressure sensitive film 7051 can detect a pressure change of the air chamber, and the measuring circuit board 7052 is provided with a Micro integrated circuit which detects the pressure change of the pressure sensitive film 7051 to generate a corresponding electrical signal and generates a corresponding frequency signal through conversion processing. The frequency signal corresponds to the water level, for example, the higher the water level, the lower the frequency value. The measurement circuit board 7052 is provided with a lead 7053, the lead 7053 is led out through a lead hole formed in the second housing 702 and electrically connected with the main controller 509, so that a frequency signal is transmitted to the main controller 509, and the main controller 509 performs water level height detection and/or eccentricity detection according to the received frequency signal.
This embodiment is based on MEMS's water level detection sensor compares in traditional water level sensor, and MEMS pressure sensor volume is littleer, and material cost is lower, has realized more accurate water level detection simultaneously, and the error reduces to within 5 mm. And this embodiment water level detection sensor cooperatees with the eccentricity detection device, can realize the detection to washing machine's eccentricity (unbalance state), prevents the washing machine harm, need not extra sensor unit and detects to directly reduced the material cost, reduced process time and installation space. In conclusion, the scheme of the embodiment achieves two purposes, and is beneficial to reducing the manufacturing cost of the washing machine.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, embodiments of the present application may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing system to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing system, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing system to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing system to cause a series of operational steps to be performed on the computer or other programmable system to produce a computer implemented process such that the instructions which execute on the computer or other programmable system provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A washing machine eccentricity detection method is applied to a washing machine comprising a water bucket and an inner barrel positioned in the water bucket, and is characterized by comprising the following steps:
acquiring a frequency signal corresponding to water level fluctuation corresponding to the fact that the water amount in the water containing barrel accords with a set water amount range and the rotating speed of the inner barrel accords with a set rotating speed range;
determining an amplitude value corresponding to water level fluctuation through frequency domain transformation based on the frequency signal, and determining a characteristic value corresponding to the eccentricity amount based on the amplitude value;
and determining the corresponding eccentricity of the washing machine according to the corresponding relation between the characteristic value and the set characteristic value interval.
2. The eccentricity detection method of a washing machine according to claim 1, wherein the acquired frequency signals include two or more groups; the determining the amplitude value corresponding to the water level fluctuation through frequency domain transformation based on the frequency signal and the determining the characteristic value corresponding to the eccentricity based on the amplitude value comprises the following steps:
performing frequency domain transformation on each group of frequency signals, and selecting the maximum amplitude value corresponding to each group of frequency signals after the frequency domain transformation;
determining a characteristic value corresponding to an eccentricity amount through a weighted calculation based on the maximum amplitude value determined for each set of the frequency signals.
3. The method for detecting the eccentricity of the washing machine according to claim 1, wherein the determining the eccentricity of the washing machine according to the corresponding relationship between the characteristic value and the set characteristic value interval comprises:
and comparing the characteristic value with a plurality of characteristic value intervals respectively corresponding to different eccentricity amounts, and determining the eccentricity amount corresponding to the washing machine according to the characteristic value interval corresponding to the characteristic value.
4. The eccentricity amount detection method of a washing machine according to claim 3, before the acquiring of the frequency signal corresponding to the fluctuation of the water level, comprising:
and detecting the water amount in the water holding barrel, and controlling the water holding barrel to intake or drain water corresponding to the fact that the water amount does not accord with the set water amount range.
5. The eccentricity amount detection method of a washing machine as claimed in claim 1, further comprising:
controlling the washing machine to dewater corresponding to the eccentricity amount of the washing machine being less than or equal to a first threshold value;
and controlling the washing machine to stop rotating corresponding to the eccentricity of the washing machine greater than a second threshold value, wherein the second threshold value is greater than the first threshold value.
6. An eccentricity amount detecting device of a washing machine, comprising: a memory for storing an executable program;
a processor for implementing the method of detecting eccentricity of a washing machine according to any one of claims 1 to 5 when executing the executable program stored in the memory.
7. A computer storage medium storing an executable program which, when executed by a processor, implements the eccentricity amount detection method of a washing machine according to any one of claims 1 to 5.
8. A washing machine comprising a tub, an inner tub positioned in the tub, and an air chamber communicating with the tub, the washing machine comprising the washing machine eccentricity amount detection apparatus according to claim 6.
9. The washing machine as claimed in claim 8, further comprising: a water level detection sensor coupled with the eccentricity detection device; the water level detection sensor includes: the pressure detection device comprises an air faucet and a detection unit, the air faucet is communicated with the air chamber, the detection unit senses pressure change caused by water level fluctuation in the air chamber, and outputs a frequency signal corresponding to the water level fluctuation to the eccentricity detection device.
10. The washing machine as claimed in claim 9, wherein the water level detection sensor further comprises a housing including a first case, a second case, and a sealing member provided between the first case and the second case; the first shell is provided with an air guide hole communicated with the interior of the first shell, and the second shell is provided with an air vent communicated with the outside atmospheric pressure;
the detection unit is located in the second shell and comprises a pressure sensitive film and a measurement circuit board, a hole matched with the air faucet in a sealing mode is formed in the sealing element, the pressure sensitive film is communicated with the air faucet through the hole and communicated with the air guide hole, and the measurement circuit board is used for sensing deformation of the pressure sensitive film to output the frequency signal.
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Cited By (2)
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| CN113789638A (en) * | 2021-10-11 | 2021-12-14 | 海信（山东）冰箱有限公司 | Washing machine control method and device and washing machine |
| CN114645418A (en) * | 2020-12-18 | 2022-06-21 | 无锡小天鹅电器有限公司 | Clothing processing equipment and eccentricity detection method and device thereof and storage medium |
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| CN107059334A (en) * | 2017-05-08 | 2017-08-18 | 无锡飞翎电子有限公司 | Rotary drum washing machine Accentric detector and rotary drum washing machine |
| CN107099969A (en) * | 2017-05-08 | 2017-08-29 | 无锡飞翎电子有限公司 | Washing machine eccentric detection method, machinable medium and variable-frequency washing machine |
| CN109487485A (en) * | 2017-09-11 | 2019-03-19 | 无锡小天鹅股份有限公司 | Control method for washing machine, system, computer equipment, readable storage medium storing program for executing and washing machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107059334A (en) * | 2017-05-08 | 2017-08-18 | 无锡飞翎电子有限公司 | Rotary drum washing machine Accentric detector and rotary drum washing machine |
| CN107099969A (en) * | 2017-05-08 | 2017-08-29 | 无锡飞翎电子有限公司 | Washing machine eccentric detection method, machinable medium and variable-frequency washing machine |
| CN109487485A (en) * | 2017-09-11 | 2019-03-19 | 无锡小天鹅股份有限公司 | Control method for washing machine, system, computer equipment, readable storage medium storing program for executing and washing machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114645418A (en) * | 2020-12-18 | 2022-06-21 | 无锡小天鹅电器有限公司 | Clothing processing equipment and eccentricity detection method and device thereof and storage medium |
| CN113789638A (en) * | 2021-10-11 | 2021-12-14 | 海信（山东）冰箱有限公司 | Washing machine control method and device and washing machine |
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