Dehydration control method, system, device and storage medium for clothing processing equipment

Abstract

This application provides a dehydration control method, system, device, and medium for a laundry processing device. The method includes: gradually increasing the rotation speed of a washing tub to a first rotation speed; determining an eccentricity value of the washing tub based on a current first acceleration signal and the load weight of the washing tub; and determining that the eccentricity value of the washing tub is less than or equal to an eccentricity threshold, and controlling the rotation speed of the washing tub to increase to perform dehydration. This application can, to a certain extent, address the vibration and noise issues encountered during the dehydration phase of existing washing machines.

Description

Technical Field

[0001] The present application belongs to the field of household appliance control technology, and specifically relates to a dehydration control method, system, device and storage medium for a clothing processing device. Background Art

[0002] As a major household appliance category, tub washing machines have gained consumer recognition for their low energy consumption, minimal wear, and high cleaning ratios, and their market share continues to grow. During the spin cycle, if eccentricity is not accurately detected and high-speed spin operation is performed, vibration noise can be generated by the vibration of the tub. The tub washing machine may even move and collide from its original position, causing damage. Furthermore, the vibration noise issue of high-speed spin is a common pain point for users and a major challenge that continues to plague developers. User experience is particularly crucial for the design and development of high-end products.

[0003] At present, traditional motor eccentricity sensing and detection technologies generally fit the collected electrical parameters based on the fluctuation data of the motor's speed or torque in each cycle to obtain the eccentricity results.

[0004] However, this method relies on motor parameters. In actual applications, there are parameter errors in the motor parameters, which greatly affects the accuracy of eccentricity perception and causes large deviations in the eccentricity detection results. As a result, the subsequent dehydration gear is inaccurate, resulting in vibration and noise problems and even equipment damage. Summary of the Invention

[0005] The present invention proposes a dehydration control method, system, device and storage medium for a clothes processing device, aiming to solve the vibration and noise problem in the dehydration stage of the existing washing machine to a certain extent.

[0006] According to a first aspect of an embodiment of the present application, a method for controlling dehydration of a clothes processing device is provided, comprising the following steps:

[0007] gradually increasing the rotation speed of the washing tub to a first rotation speed;

[0008] obtaining an eccentricity value of the washing tub according to the current first acceleration signal and the load weight of the washing tub;

[0009] It is determined that the eccentricity value of the washing tub is less than or equal to the eccentricity threshold value, and the rotation speed of the washing tub is controlled to increase for dehydration.

[0010] In some embodiments of the present application, obtaining the eccentricity value of the washing tub according to the current first acceleration signal and the load weight of the washing tub specifically includes:

[0011] Obtaining a composite planar displacement of the washing tub within a certain washing cycle according to the current first acceleration signal;

[0012] The eccentricity value of the washing tub is obtained according to the composite displacement of the plane and the load weight of the washing tub.

[0013] In some embodiments of the present application, obtaining the planar composite displacement of the washing tub within a certain washing cycle according to the current first acceleration signal specifically includes:

[0014] According to the first acceleration signal, the displacement of the washing tub in the x-direction and the displacement in the y-direction in the plane after a certain rotation period is calculated.

[0015] The composite displacement of the plane is calculated based on the displacement in the x-direction and the displacement in the y-direction.

[0016] In some embodiments of the present application, the eccentricity value of the washing tub is obtained according to the composite displacement of the plane and the load weight of the washing tub, specifically including:

[0017] Detect the load weight of the washing tub;

[0018] According to the plane composite displacement and the load weight of the washing tub, the eccentricity value of the washing tub is calculated by using the eccentricity value fitting formula.

[0019] In some embodiments of the present application, before obtaining the eccentricity value of the washing tub according to the current first acceleration signal and the load weight of the washing tub, the method further includes:

[0020] Obtaining a current first acceleration signal through an acceleration sensor;

[0021] Alternatively, the first acceleration signal is obtained according to the first rotational speed using an acceleration formula.

[0022] In some embodiments of the present application, the following further comprises:

[0023] It is determined that the eccentricity value of the washing tub is greater than an eccentricity threshold, and the rotation speed of the washing tub is reduced to zero.

[0024] In some embodiments of the present application, after gradually increasing the rotation speed of the washing tub to the first rotation speed, the method further includes:

[0025] determining whether a dehydration condition is met according to the first acceleration signal;

[0026] When it is determined that the dehydration conditions have not been met, reduce the speed of the washing tub to zero.

[0027] In some embodiments of the present application, determining that the eccentricity value of the washing tub is less than or equal to the eccentricity threshold and controlling the rotation speed of the washing tub to increase for dehydration specifically include:

[0028] gradually increasing the rotation speed of the washing tub to a second rotation speed;

[0029] detecting a current second acceleration signal of the washing tub;

[0030] determining whether a dehydration condition is met according to the second acceleration signal;

[0031] If it is determined that the dehydration conditions have not been met, reduce the speed of the washing tub to zero; if it is determined that the dehydration conditions have been met, perform dehydration.

[0032] In some embodiments of the present application, determining whether the dehydration condition is met specifically includes:

[0033] Obtaining a motion displacement of the washing tub in at least one direction according to the current acceleration signal;

[0034] It is determined that the movement displacement of the washing tub in at least one direction is less than a displacement threshold in the direction, and a dehydration condition is met.

[0035] In some embodiments of the present application, determining whether the dehydration condition is met specifically includes:

[0036] Obtaining an acceleration value of the washing tub in at least one direction according to the current acceleration signal;

[0037] It is determined that the acceleration value in at least one direction of the washing tub is less than an acceleration threshold in the direction, and a dehydration condition is met.

[0038] According to a third aspect of an embodiment of the present application, a dehydration control system for a clothes processing device is provided, specifically comprising:

[0039] a speed control module, configured to gradually increase the speed of the washing tub to a first speed;

[0040] an eccentricity detection module, configured to obtain an eccentricity value of the washing tub according to the current first acceleration signal and the load weight of the washing tub;

[0041] The dehydration module is used to control the rotation speed of the washing tub to increase for dehydration when the eccentricity value of the washing tub is less than or equal to the eccentricity threshold.

[0042] According to a third aspect of an embodiment of the present application, there is provided a clothes processing device, comprising:

[0043] Memory: used to store executable instructions; and

[0044] Processor: used to connect with the memory to execute executable instructions to complete the dehydration control method of the clothing processing equipment.

[0045] According to a fourth aspect of an embodiment of the present application, a computer-readable storage medium is provided, on which a computer program is stored; the computer program is executed by a processor to implement a dehydration control method for a clothing processing device.

[0046] The laundry processing device dehydration control method, system, laundry processing device, and medium in the embodiments of the present application include: gradually increasing the rotation speed of the washing tub to a first rotation speed; determining an eccentricity value of the washing tub based on a current first acceleration signal and the load weight of the washing tub; and determining that the eccentricity value of the washing tub is less than or equal to an eccentricity threshold, and controlling the rotation speed of the washing tub to increase to perform dehydration. This application can, to a certain extent, address the vibration and noise issues encountered during the dehydration phase of existing washing machines. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0048] Figure 1 : shows a flowchart of the steps of the dehydration control method of the clothes processing device according to an embodiment of the present application;

[0049] Figure 2 A schematic diagram of the rotation speed of a clothes treatment device under low-speed eccentricity sensing according to a dehydration control method of the embodiment of the present application is shown;

[0050] Figure 3 : shows a schematic diagram of the steps for calculating the eccentricity value of the washing tub according to an embodiment of the present application;

[0051] Figure 4 : shows a schematic diagram of a process for controlling the rotation speed of the washing tub to increase for dehydration according to an embodiment of the present application;

[0052] Figure 5 : shows a flowchart of the steps of a dehydration control method for a clothes processing device according to another embodiment of the present application;

[0053] Figure 6 A schematic diagram of a preferred process of low-speed eccentricity sensing in a dehydration control method for a clothes processing device according to an embodiment of the present application is shown;

[0054] Figure 7 A schematic structural diagram of a dehydration control system for a clothes processing device according to an embodiment of the present application is shown;

[0055] Figure 8 Schematic diagram of the structure of a clothing processing device according to an embodiment of the present application is shown in FIG.

[0056] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0057] In the process of realizing the present application, the inventor discovered that the dehydration method of a washing machine such as a drum washing machine is that the clothes move along with the drum to perform centrifugal motion, and the water in the clothes is thrown out. However, during dehydration, the drum washing machine is easily affected by the bias caused by the uneven distribution of clothes in the drum, resulting in a drum collision, that is, the drum hits the outer box. In severe cases, displacement will occur, which will cause serious noise problems and affect the service life of the washing machine. However, in terms of motor eccentricity perception and detection technology, the traditional method generally fits the collected electrical parameters based on the fluctuation data of the speed or torque of the motor in each cycle to obtain the eccentricity result. However, this method depends on the motor parameters. In actual applications, there are parameter errors in the motor parameters, which greatly affect the accuracy of eccentricity perception and cause large deviations in the eccentricity detection results. As a result, the subsequent dehydration gear is inaccurate, and vibration and noise problems or even equipment damage problems occur.

[0058] It was also found that although some technical solutions have adopted a method of continuous multiple perceptions to reduce the fluctuation of sampling data in order to improve perception accuracy, this makes the eccentricity perception time too long, which increases the total time of a single dehydration.

[0059] Or even if an acceleration sensor is used in some technical solutions, traditional motor sensing technology is still used in the low-speed sensing stage to determine whether dehydration is allowed, and then confirm the preset dehydration gear.

[0060] Based on this, the dehydration control method, system, clothing processing equipment and medium provided in the present application include: gradually increasing the rotation speed of the washing tub to a first rotation speed; obtaining the eccentricity value of the washing tub based on the current first acceleration signal and the load weight of the washing tub; determining that the eccentricity value of the washing tub is less than or equal to the eccentricity threshold, and controlling the rotation speed of the washing tub to increase for dehydration.

[0061] This application can solve the vibration and noise problems in the dehydration stage of existing washing machines to a certain extent.

[0062] Through the dehydration control method, system, clothing processing equipment and medium provided by this application, by operating in a low-speed steady state, detecting the output information of the acceleration sensor, combining the weighing results, and eliminating the influence of load inertia, the eccentricity state and preset speed gear can be accurately obtained. Compared with traditional motor eccentricity sensing technology, it is more direct, fast and accurate.

[0063] At the same time, when accelerating through the resonance zone, the present application uses the actual acceleration signal to determine whether there is a risk of hitting the barrel. Compared with the diagonal eccentricity sensing algorithm of traditional motors, it avoids a large number of complex calculations and greatly eliminates the problem of delayed protection action caused by the sampling calculation process.

[0064] In the low-speed steady-state perception stage, this application uses the acceleration information xy-axis direction data to obtain the static eccentricity result. In the acceleration stage, considering the influence of the actual diagonal eccentricity, the acceleration information xyz-axis direction data is used to monitor the acceleration process.

[0065] In order to make the technical solutions and advantages of the embodiments of the present application more clearly understood, the exemplary embodiments of the present application are further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, and are not an exhaustive list of all the embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other unless they conflict.

[0066] Example 1

[0067] Figure 1 Detailed description of the steps of the dehydration control method of the clothing processing equipment according to the embodiment of the present application is shown in FIG.

[0068] Figure 2 A schematic diagram of the rotation speed of a clothes processing device under low-speed eccentric sensing according to an embodiment of the present application is shown.

[0069] like Figure 1 As shown, the dehydration control method of the clothes processing equipment includes the following steps:

[0070] S1: gradually increasing the rotation speed of the washing tub to a first rotation speed.

[0071] like Figure 2 As shown, in actual application, after the motor starts, the speed of the washing tub gradually increases from zero speed, and accelerates to the first speed w1 at time t1. The first speed w1 is used as the eccentricity sensing speed and is the set protection threshold.

[0072] During this period, the acceleration signals in the three directions of xyz axis are detected in real time.

[0073] S2: Obtaining an eccentricity value of the washing tub according to the current first acceleration signal and the load weight of the washing tub.

[0074] Figure 3 Schematic diagram of the calculation steps of the eccentricity value of the washing tub according to an embodiment of the present application is shown in FIG.

[0075] Specific description, such as Figure 3 As shown, when obtaining the eccentricity value of the washing tub according to the current first acceleration signal and the load weight of the washing tub, the following two steps are included: S21, obtaining the plane composite displacement of the washing tub within a certain washing cycle according to the current first acceleration signal; S22, obtaining the eccentricity value of the washing tub according to the plane composite displacement and the load weight of the washing tub.

[0076] In the laundry processing device of this application, a drum washing machine is used as an example. The x-direction and the y-direction in a plane are preferably mutually perpendicular directions in a vertical plane. In actual applications of the embodiments of this application, the x-direction and the y-direction are specifically the up-down direction and the left-right direction of the drum, or the vertical direction and the horizontal direction of the drum. Correspondingly, the acceleration signal is in the xy-axis direction.

[0077] Similarly, the acceleration signals in the three directions of the xyz axis, namely the up and down direction, left and right direction, and front and back direction of the roller, or the vertical direction, horizontal direction, and longitudinal direction of the roller.

[0078] First of all, it should be noted that the drum dehydration operation can be equivalent to a simple harmonic motion with a single degree of freedom. The motion displacement x(t) in a certain direction can be expressed by the following formula:

[0079] x(t)=A*cos(w*t+φ);

[0080] Where A is the displacement amplitude, w is the rotation speed, and φ is the starting angle.

[0081] Then, after taking the derivative of the displacement x(t) in a certain direction twice, the acceleration S in a certain direction can be obtained as follows:

[0082] S=d2x(t) / d2t=-A*w2*cos(w*t+φ);

[0083] Where S is the acceleration.

[0084] Therefore, after the drum rotates one circle, the displacement amplitude A in a certain direction can be equivalent to:

[0085] A=△S / V 2 ;

[0086] Where, △S=Smax-Smin;

[0087] Smax and Smin are the maximum acceleration values ​​of the first acceleration signal in the x-direction or y-direction during one rotation of the drum, respectively; Smin is the minimum acceleration value of the first acceleration signal in the x-direction or y-direction during one rotation of the drum, and V is the rotation speed.

[0088] In S21, during specific implementation, the planar composite displacement of the washing tub within a certain washing cycle is obtained according to the current first acceleration signal. The specific operations are as follows:

[0089] 1) Calculate the displacement Ax in the x direction and Ay in the y direction of the washing tub in the plane after the washing tub rotates for a certain period of time according to the first acceleration signal.

[0090] The calculation formula of displacement A is:

[0091] A=△S / V 2 ;

[0092] Wherein, △S=Smax-Smin; A is Ax or Ay.

[0093] Wherein, Smax and Smin are the maximum acceleration of the first acceleration signal in the x direction or y direction during a certain period of rotation of the drum, respectively; Smin is the minimum acceleration of the first acceleration signal in the x direction or y direction during a certain period of rotation of the drum, and V is the rotation speed.

[0094] 2) Then, the composite displacement of the plane is calculated based on the displacement Ax in the x direction and the displacement Ay in the y direction within the plane.

[0095] The calculation formula of the plane composite displacement Axy is:

[0096] Axy=√(Ax) 2 +(Ay) 2 .

[0097] In S22, further, when the eccentricity value of the washing tub is obtained based on the plane composite displacement and the load weight of the washing tub, the load weight Wt of the washing tub is first obtained. After weighing, the influence of the load inertia can be eliminated according to the f(Axy, Wt) fitting formula to obtain the eccentricity perception result, and then determine whether dehydration is allowed. If dehydration is allowed, the preset maximum dehydration speed gear is obtained. Otherwise, after deceleration to zero, the eccentricity perception is attempted again.

[0098] Obtaining the eccentricity value of the washing tub according to the plane composite displacement and the load weight of the washing tub specifically includes: first, detecting the load weight of the washing tub; then, calculating the eccentricity value of the drum according to the plane composite displacement and the load weight of the drum through the eccentricity value fitting formula.

[0099] The calculation formula of the eccentricity value f is:

[0100] f(A,Wt)=a*A 2 +b*Wt 2 +c*A*Wt+d*A+e*Wt+f;

[0101] Wherein, f(A, Wt) is the eccentricity value in the xy plane; A is the composite displacement in the xy plane; Wt is the load weight of the roller; and a to f are all constants.

[0102] In a specific implementation, the result of the load weight can be obtained by a motor weighing sensing method or a weighing sensor method.

[0103] In another preferred embodiment, before obtaining the eccentricity value of the washing tub based on the current first acceleration signal and the load weight of the washing tub, the method further includes: obtaining the current first acceleration signal via an acceleration sensor; or obtaining the first acceleration signal via an acceleration formula based on the first rotational speed. In this embodiment, obtaining the first acceleration signal using an acceleration sensor is preferred.

[0104] S3: Determine that the eccentricity value of the washing tub is less than or equal to an eccentricity threshold, and control the rotation speed of the washing tub to increase for dehydration.

[0105] Figure 4 Detailed description is given of a flow chart of controlling the rotation speed of the washing tub to increase for dehydration according to an embodiment of the present application.

[0106] like Figure 4 As shown, specifically described, when it is determined that the eccentricity value of the washing tub is less than or equal to the eccentricity threshold, the speed of the washing tub is controlled to increase for dehydration. This step specifically includes:

[0107] S31: gradually increasing the rotation speed of the washing tub to a second rotation speed.

[0108] like Figure 2 As shown, at the eccentricity sensing speed, i.e., the first speed w1, after determining that the eccentricity value of the washing tub meets the requirement, the speed of the washing tub is gradually increased to the second speed w2. This process is always in the low speed stage, so it will pass through the resonance zone of the whole machine.

[0109] S32: Detecting the current second acceleration signal of the washing tub.

[0110] During S31 , acceleration signals in the three directions of the xyz axis are detected in real time to obtain a second acceleration signal.

[0111] S33: Determine whether a dehydration condition is met according to the second acceleration signal.

[0112] In the preferred embodiment, the process of gradually increasing the washing tub speed from the first speed w1 to the second speed w2 is always at a low speed stage and passes through the resonance zone of the entire machine. Therefore, when reaching the second speed w2, it is necessary to further determine whether the dehydration conditions are met, and only when they are met can the dehydration process be performed.

[0113] In one embodiment, determining whether the dehydration condition is met specifically includes: first, obtaining the movement displacement of the washing tub in at least one direction based on the current acceleration signal; then, determining that the movement displacement of the washing tub in at least one direction is less than a displacement threshold in that direction, and the dehydration condition is met.

[0114] In another embodiment, whether the dehydration condition is met can also be determined by the following steps: first, based on the current acceleration signal, the acceleration value of the washing tub in at least one direction is obtained; then, it is determined that the acceleration value in at least one direction of the washing tub is less than the acceleration threshold in that direction, and the dehydration condition is met.

[0115] Compared with the existing technology, the present application eliminates the complex diagonal eccentricity detection algorithm in the original motor sensing algorithm. The xyz-axis acceleration signal can be converted into displacement in the xyz-axis direction, and then the displacement protection thresholds in each direction of the xyz-axis are set for comparison to intuitively and quickly determine whether there is a risk of the washing tub colliding with the tub. Compared with the diagonal eccentricity sensing algorithm of the traditional motor, the judgment execution of the present application is more direct, fast and accurate, avoiding a large number of complex calculations, and greatly eliminating the problem of delayed protection action caused by the sampling calculation process.

[0116] S34: If it is determined that the dehydration condition is not met, the rotation speed of the washing tub is reduced to below the first rotation speed; if it is determined that the dehydration condition is met, dehydration is performed.

[0117] Figure 5 Detailed description of the invention shows a flowchart of a method for controlling the dehydration of a clothing processing device according to another embodiment of the present invention.

[0118] like Figure 5 As shown, in other embodiments, the dehydration control method of the clothing processing equipment further includes:

[0119] S4: Determine that the eccentricity value of the washing tub is greater than an eccentricity threshold, and reduce the rotation speed of the washing tub to below the first rotation speed.

[0120] In a preferred embodiment, after gradually increasing the rotation speed of the washing tub to the first rotation speed w1 in step S1, the process also includes determining whether the dehydration condition is met according to the first acceleration signal.

[0121] The dehydration condition here is based on the same principle as the above: in one embodiment, determining whether the dehydration condition is met specifically includes: first, obtaining the movement displacement of the washing tub in at least one direction based on the current acceleration signal; then, determining that the movement displacement of the washing tub in at least one direction is less than the displacement threshold in that direction, and the dehydration condition is met.

[0122] In another embodiment, whether the dehydration condition is met can also be determined by the following steps: first, based on the current acceleration signal, the acceleration value of the washing tub in at least one direction is obtained; then, it is determined that the acceleration value in at least one direction of the washing tub is less than the acceleration threshold in that direction, and the dehydration condition is met.

[0123] Therefore, when it is determined that the dehydration condition is not met, the rotation speed of the washing tub is reduced to be lower than the first rotation speed w1. When the dehydration condition is met, steps S2-S3 are performed normally.

[0124] Herein, reducing the rotation speed of the washing tub to below the first rotation speed specifically includes gradually reducing the rotation speed of the washing tub to zero, that is, the motor stops running.

[0125] Figure 6 A schematic diagram of a preferred process of low-speed eccentricity sensing in a dehydration control method for a clothes processing device according to an embodiment of the present application is shown.

[0126] In summary, if Figure 6 As shown, see also Figure 2 Preferably, the process of the dehydration control method of the clothes processing equipment in low-speed eccentricity sensing is as follows:

[0127] First, the device is turned on, and after the motor starts, the speed of the washing tub gradually increases from zero speed, and accelerates to the first speed w1 at time t1. The first speed w1 is used as the eccentricity sensing speed, and the acceleration signals in the three directions of the xyz axis are detected in real time as the first acceleration signal; at the first speed w1, the acceleration threshold is judged and the eccentricity of the washing tub is sensed.

[0128] The acceleration threshold determination, as described above, is used to determine whether the dehydration conditions have been met. For example, the acceleration threshold determination can identify sudden speed changes at times t2 and t3, which do not meet the dehydration conditions. The eccentricity sensing of the washing tub includes steady-state sensor sensing, which calculates the eccentricity of the washing tub using the acceleration sensor. During this process, the washing tub is weighed and the eccentricity of the drum is calculated using the eccentricity fitting formula.

[0129] When the acceleration threshold judgment and the eccentricity perception of the washing tub meet the requirements, the rotation speed continues to be gradually increased to time t4, at which time the rotation speed of the washing tub reaches the second rotation speed w2.

[0130] Next, the speed is increased to the second speed w2. This process remains at a low speed, so the machine will pass through the resonance zone. It is necessary to determine whether there is a risk of the washing tub colliding. This risk is also determined by whether the dehydration conditions have been met. If there is no risk of the washing tub colliding, the pre-spin process is started or the speed is further increased. If there is a risk of the washing tub colliding, the second speed w2 is reduced, or the machine can be directly decelerated to zero and stopped.

[0131] In summary, the dehydration control method of the clothing processing equipment in the embodiment of the present application includes: gradually increasing the rotation speed of the washing tub to a first rotation speed; obtaining the eccentricity value of the washing tub based on the current first acceleration signal and the load weight of the washing tub; determining that the eccentricity value of the washing tub is less than or equal to the eccentricity threshold, and controlling the rotation speed of the washing tub to increase for dehydration.

[0132] The operating principle of the dehydration control method for clothing processing equipment in the embodiments of this application is further explained as follows: Without changing the existing equipment and transmission structure, this application integrates an acceleration sensor via a frequency conversion board. By utilizing the principle that the outer drum and motor are relatively fixed and their accelerations can be considered to be approximately related, the acceleration signals in the spatial xyz directions are processed to obtain direct spatial vibration information during the operation of the equipment.

[0133] At the same time, during the low-speed sensing phase, this application uses direct spatial vibration information, namely multi-dimensional acceleration signals, to more accurately reflect the actual load distribution. The xy-axis acceleration data is used to derive the static eccentricity result. During the acceleration phase, the acceleration data, along the xyz-axis, is used to monitor the acceleration process, taking into account the impact of the actual diagonal eccentricity. Combined with the motor weighing results, the load distribution and eccentricity can be quickly and accurately determined, thereby determining whether dehydration is permitted and, in turn, determining the equipment's dehydration preset gear.

[0134] Therefore, through the dehydration control method of the clothing processing equipment provided in this application, the output information of the acceleration sensor is detected in low-speed steady-state operation, combined with the weighing results, and the influence of load inertia is eliminated, the eccentricity state and the preset speed gear can be accurately obtained. Compared with traditional motor eccentricity sensing technology, eccentricity sensing is more direct and fast, shortens the overall sensing time, and avoids the influence of factors such as motor parameters and platform differences on sensing accuracy, which greatly solves the vibration and noise problem in the dehydration stage of existing washing machines.

[0135] At the same time, when accelerating through the resonance zone, the present application uses the actual acceleration signal to determine whether there is a risk of hitting the barrel. Compared with the diagonal eccentricity sensing algorithm of traditional motors, it avoids a large number of complex calculations and greatly eliminates the problem of delayed protection action caused by the sampling calculation process.

[0136] Example 2

[0137] This embodiment provides a dehydration control system for a clothes processing device. For details not disclosed in the dehydration control system for a clothes processing device of this embodiment, please refer to the specific implementation contents of the dehydration control method for a clothes processing device in other embodiments.

[0138] Figure 7A structural schematic diagram of a dehydration control system of a clothes processing device according to an embodiment of the present application is shown.

[0139] like Figure 7 As shown, this embodiment provides a dehydration control system for a clothes processing device, which specifically includes a speed control module 10 , an eccentricity detection module 20 and a dehydration module 30 .

[0140] Specifically,

[0141] The rotation speed control module 10 is used to gradually increase the rotation speed of the washing tub to a first rotation speed.

[0142] In practice, after the motor starts, the washing tub's speed gradually increases from zero to a first speed w1, which serves as the eccentricity sensing speed and the set protection threshold. During this time, acceleration signals along the x, y, and z axes are detected in real time.

[0143] The eccentricity detection module 20 is configured to obtain an eccentricity value of the washing tub according to the current first acceleration signal and the load weight of the washing tub.

[0144] When obtaining the eccentricity value of the washing tub according to the current first acceleration signal and the load weight of the washing tub, the following process is included:

[0145] First, the planar composite displacement of the washing tub within a certain washing cycle is obtained according to the current first acceleration signal.

[0146] Specifically, 1) according to the first acceleration signal, the displacement Ax in the x direction and the displacement Ay in the y direction of the washing tub in the plane after a certain rotation period are calculated.

[0147] The calculation formula of displacement A is:

[0148] A=△S / V2;

[0149] Wherein, △S=Smax-Smin; A is Ax or Ay.

[0150] Wherein, Smax and Smin are the maximum acceleration of the first acceleration signal in the x direction or y direction during a certain period of rotation of the drum, respectively; Smin is the minimum acceleration of the first acceleration signal in the x direction or y direction during a certain period of rotation of the drum, and V is the rotation speed.

[0151] 2) Then, the composite displacement of the plane is calculated based on the displacement Ax in the x direction and the displacement Ay in the y direction within the plane.

[0152] The calculation formula of the plane composite displacement Axy is:

[0153] Axy=√(Ax)2+(Ay)2.

[0154] Then, further, when obtaining the eccentricity value of the washing tub based on the composite displacement of the plane and the load weight of the washing tub, the load weight Wt of the washing tub is first obtained. After weighing, the influence of the load inertia can be eliminated according to the fitting formula f(Axy, Wt), and the eccentricity perception result is obtained. Then, it is judged whether dehydration is allowed. If dehydration is allowed, the preset maximum dehydration speed gear is obtained. Otherwise, after deceleration to zero, the eccentricity perception is attempted again.

[0155] Obtaining the eccentricity value of the washing tub according to the plane composite displacement and the load weight of the washing tub specifically includes: first, detecting the load weight of the washing tub; then, calculating the eccentricity value of the drum according to the plane composite displacement and the load weight of the drum through the eccentricity value fitting formula.

[0156] The calculation formula of the eccentricity value f is:

[0157] f(A,Wt)=a*A2+b*Wt 2+c*A*Wt+d*A+e*Wt+f;

[0158] Wherein, f(A, Wt) is the eccentricity value in the xy plane; A is the composite displacement in the xy plane; Wt is the load weight of the roller; and a to f are all constants.

[0159] The dehydration module 30 is configured to control the rotation speed of the washing tub to increase for dehydration when the eccentricity value of the washing tub is less than or equal to an eccentricity threshold.

[0160] Specifically, when it is determined that the eccentricity value of the washing tub is less than or equal to the eccentricity threshold, the rotation speed of the washing tub is controlled to increase for dehydration. The specific process is as follows:

[0161] First, the rotation speed of the washing tub is gradually increased to a second rotation speed.

[0162] like Figure 2 As shown, at the eccentricity sensing speed, i.e., the first speed w1, after determining that the eccentricity value of the washing tub meets the requirement, the speed of the washing tub is gradually increased to the second speed w2. This process is always in the low speed stage, so it will pass through the resonance zone of the whole machine.

[0163] Then, the second acceleration signal of the washing tub is detected. When the rotation speed is increased, the acceleration signals in the three directions of the xyz axis are detected in real time to obtain the second acceleration signal.

[0164] Secondly, it is determined whether the dehydration condition is met according to the second acceleration signal.

[0165] In the preferred embodiment, the process of gradually increasing the washing tub speed from the first speed w1 to the second speed w2 is always at a low speed stage and passes through the resonance zone of the entire machine. Therefore, when reaching the second speed w2, it is necessary to further determine whether the dehydration conditions are met, and only when they are met can the dehydration process be performed.

[0166] In one embodiment, determining whether the dehydration condition is met specifically includes: first, obtaining the movement displacement of the washing tub in at least one direction based on the current acceleration signal; then, determining that the movement displacement of the washing tub in at least one direction is less than a displacement threshold in that direction, and the dehydration condition is met.

[0167] In another embodiment, whether the dehydration condition is met can also be determined by the following steps: first, based on the current acceleration signal, the acceleration value of the washing tub in at least one direction is obtained; then, it is determined that the acceleration value in at least one direction of the washing tub is less than the acceleration threshold in that direction, and the dehydration condition is met.

[0168] Finally, when it is determined that the dehydration condition is not met, the rotation speed of the washing tub is reduced to be lower than the first rotation speed; when it is determined that the dehydration condition is met, dehydration is performed.

[0169] In the dehydration control system of the clothing processing equipment in the embodiment of the present application, the speed control module 10 gradually increases the speed of the washing tub to a first speed; the eccentricity detection module 20 obtains the eccentricity value of the washing tub based on the current first acceleration signal and the load weight of the washing tub; the dehydration module 30 determines that the eccentricity value of the washing tub is less than or equal to the eccentricity threshold, and controls the speed of the washing tub to increase for dehydration.

[0170] During the low-speed sensing phase, this application uses direct spatial vibration information, namely multi-dimensional acceleration signals, to more accurately reflect the actual load distribution. The xy-axis acceleration data is used to derive static eccentricity. During the acceleration phase, the xyz-axis acceleration data is used to monitor the acceleration process, taking into account the impact of actual diagonal eccentricity. Combined with the motor weighing results, the load distribution and eccentricity can be quickly and accurately determined, thereby determining whether dehydration is allowed and, in turn, determining the device's preset dehydration gear.

[0171] Therefore, through the dehydration control method of the clothing processing equipment provided in this application, the output information of the acceleration sensor is detected in low-speed steady-state operation, combined with the weighing results, and the influence of load inertia is eliminated, the eccentricity state and the preset speed gear can be accurately obtained. Compared with traditional motor eccentricity sensing technology, eccentricity sensing is more direct and fast, shortens the overall sensing time, and avoids the influence of factors such as motor parameters and platform differences on sensing accuracy, which greatly solves the vibration and noise problem in the dehydration stage of existing washing machines.

[0172] At the same time, when accelerating through the resonance zone, the present application uses the actual acceleration signal to determine whether there is a risk of hitting the barrel. Compared with the diagonal eccentricity sensing algorithm of traditional motors, it avoids a large number of complex calculations and greatly eliminates the problem of delayed protection action caused by the sampling calculation process.

[0173] Example 3

[0174] This embodiment provides a clothes processing device. For details not disclosed in the clothes processing device of this embodiment, please refer to the specific implementation content of the dehydration control method or system of the clothes processing device in other embodiments.

[0175] Figure 8 Schematic diagram of the structure of a clothing processing device 400 according to an embodiment of the present application is shown in FIG.

[0176] like Figure 8 As shown, the laundry processing device 400 includes:

[0177] Memory 402: used to store executable instructions; and

[0178] Processor 401: used to connect with memory 402 to execute executable instructions to complete the motion vector prediction method.

[0179] Those skilled in the art will understand that Figure 8 It is only an example of the clothing processing device 400 and does not constitute a limitation of the clothing processing device 400. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the clothing processing device 400 may also include input and output devices, network access devices, buses, etc.

[0180] The processor 401 (Central Processing Unit, CPU) may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor, or the processor 401 may be any conventional processor. The processor 401 is the control center of the clothing processing device 400, connecting various parts of the entire clothing processing device 400 using various interfaces and lines.

[0181] Memory 402 can be used to store computer-readable instructions. Processor 401 implements various functions of clothing treatment device 400 by running or executing computer-readable instructions or modules stored in memory 402 and accessing data stored in memory 402. Memory 402 may primarily include a program storage area and a data storage area. The program storage area may store an operating system and at least one application required for a function (such as a sound playback function or an image playback function); the data storage area may store data generated based on the use of clothing treatment device 400. Furthermore, memory 402 may include a hard disk, internal memory, a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, at least one disk storage device, a flash memory device, a read-only memory (ROM), a random access memory (RAM), or other non-volatile or volatile storage devices.

[0182] If the modules integrated into clothing processing device 400 are implemented as software functional modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the present invention can also implement all or part of the processes in the above-mentioned method embodiments by instructing the relevant hardware through computer-readable instructions. The computer-readable instructions can be stored in a computer-readable storage medium. When executed by a processor, the computer-readable instructions can implement the steps of each of the above-mentioned method embodiments.

[0183] Example 6

[0184] This embodiment provides a computer-readable storage medium having a computer program stored thereon; the computer program is executed by a processor to implement the dehydration control method for a clothes processing device in other embodiments.

[0185] The clothing processing device and computer storage medium in the embodiment of the present application include: gradually increasing the rotation speed of the washing tub to a first rotation speed; obtaining the eccentricity value of the washing tub based on the current first acceleration signal and the load weight of the washing tub; determining that the eccentricity value of the washing tub is less than or equal to the eccentricity threshold, and controlling the rotation speed of the washing tub to increase for dehydration.

[0186] By using the clothing processing equipment and medium provided in this application, the output information of the acceleration sensor is detected in a low-speed steady-state operation. Combined with the weighing results, the influence of the load inertia is eliminated to accurately obtain the eccentricity state and the preset speed gear. Compared with the traditional motor eccentricity sensing technology, the eccentricity sensing is more direct and faster, shortening the overall sensing time, and avoiding the influence of factors such as motor parameters and platform differences on the sensing accuracy, which greatly solves the vibration and noise problem in the dehydration stage of the existing washing machine.

[0187] At the same time, when accelerating through the resonance zone, the present application uses the actual acceleration signal to determine whether there is a risk of hitting the barrel. Compared with the diagonal eccentricity sensing algorithm of traditional motors, it avoids a large number of complex calculations and greatly eliminates the problem of delayed protection action caused by the sampling calculation process.

[0188] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0189] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0190] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0191] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0192] The terms used in this invention are for the purpose of describing specific embodiments only and are not intended to limit the invention. The singular forms "a," "the," and "the" used in this invention and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0193] It should be understood that although the terms "first," "second," "third," etc. may be used in the present invention to describe various information, such information should not be limited to these terms. These terms are merely used to distinguish information of the same type from one another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present invention. Depending on the context, the term "if" as used herein may be interpreted as "when," "when," or "in response to determining."

[0194] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0195] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. A dehydration control method for a clothes processing device, characterized in that: The following steps are involved: gradually increasing the rotation speed of the washing tub to a first rotation speed; Calculating the displacement of the washing tub in the x-direction and the y-direction in the plane after a certain rotation period according to the current first acceleration signal; and calculating the composite displacement in the plane according to the displacement in the x-direction and the y-direction in the plane; detecting the load weight of the washing tub, and calculating the eccentricity of the washing tub using an eccentricity fitting formula according to the plane composite displacement and the load weight of the washing tub; Determining that the eccentricity value of the washing tub is less than or equal to an eccentricity threshold, gradually increasing the rotation speed of the washing tub to a second rotation speed, and detecting a current second acceleration signal of the washing tub; determining whether a dehydration condition is met according to the second acceleration signal; Determining that the dehydration condition is not met, reducing the rotation speed of the washing tub until the rotation speed reaches zero; determining that the dehydration condition is met, performing dehydration; The displacement in the x-direction and the displacement in the y-direction of the washing tub after a certain rotation period are calculated based on the current first acceleration signal according to the following formula: A=△S / V 2 Where A is the displacement in the x direction x Or y-direction displacement A y , △S=S max -S min ;S max and S min are the maximum acceleration value and the minimum acceleration value of the first acceleration signal in the x direction or y direction during a certain period of rotation of the drum; V is the rotation speed; The plane composite displacement A is calculated based on the displacement in the x-direction and the displacement in the y-direction in the plane according to the following formula: xy : The eccentricity of the washing tub is calculated using the eccentricity fitting formula according to the composite displacement of the plane and the load weight of the washing tub according to the following formula: f(A,Wt)=aA 2 +bWt 2 +cAWt+dA+eWt+f Wherein, f(A, Wt) is the eccentricity value in the xy plane; A is the composite displacement in the xy plane; Wt is the load weight of the roller; and a to f are all constants.

2. The dehydration control method of a clothes processing device according to claim 1, characterized in that: Before obtaining the eccentricity value of the washing tub according to the current first acceleration signal and the load weight of the washing tub, the method further includes: Obtaining a current first acceleration signal through an acceleration sensor; Alternatively, a first acceleration signal is obtained according to the first rotation speed using an acceleration formula.

3. The dehydration control method of a clothes processing device according to claim 1, characterized in that: Also includes: It is determined that the eccentricity value of the washing tub is greater than an eccentricity threshold, and the rotation speed of the washing tub is reduced until the rotation speed reaches zero.

4. The dehydration control method of a clothes processing device according to claim 1, characterized in that: After gradually increasing the rotation speed of the washing tub to the first rotation speed, the method further includes: determining whether a dehydration condition is met according to the first acceleration signal; When it is determined that the dehydration condition is not met, the rotation speed of the washing tub is reduced until the rotation speed reaches zero.

5. The dehydration control method of a clothes processing device according to claim 4, characterized in that: The determining whether the dehydration condition is met specifically includes: Obtaining a motion displacement of the washing tub in at least one direction according to the current acceleration signal; It is determined that the movement displacement of the washing tub in at least one direction is less than a displacement threshold in the direction, and a dehydration condition is met.

6. The dehydration control method of a clothes processing device according to claim 4, characterized in that: The determining whether the dehydration condition is met specifically includes: Obtaining an acceleration value of the washing tub in at least one direction according to the current acceleration signal; It is determined that the acceleration value in at least one direction of the washing tub is less than an acceleration threshold in the direction, and a dehydration condition is met.

7. A dehydration control system for a clothes processing device, characterized in that: Specifically include: a speed control module, configured to gradually increase the speed of the washing tub to a first speed; an eccentricity detection module, configured to calculate, based on the current first acceleration signal, the x-direction displacement and the y-direction displacement of the washing tub in a plane after a certain rotation period; calculate a composite displacement in the plane based on the x-direction displacement and the y-direction displacement in the plane; detect the load weight of the washing tub, and calculate the eccentricity value of the washing tub using an eccentricity value fitting formula based on the composite displacement in the plane and the load weight of the washing tub; a dehydration module, configured to gradually increase the rotation speed of the washing tub to a second rotation speed when the eccentricity value of the washing tub is less than or equal to an eccentricity threshold, detect a second acceleration signal of the washing tub, and determine whether a dehydration condition is met based on the second acceleration signal; Determining that the dehydration condition is not met, reducing the rotation speed of the washing tub until the rotation speed reaches zero; determining that the dehydration condition is met, performing dehydration; The eccentricity detection module is further configured to calculate the displacement in the x-direction and the y-direction of the washing tub in the plane after a certain rotation period according to the current first acceleration signal according to the following formula: A=△S / V 2 Where A is the displacement in the x direction x Or y-direction displacement A y , △S=S max -S min ;S max and S min are the maximum acceleration value and the minimum acceleration value of the first acceleration signal in the x direction or y direction during a certain period of rotation of the drum; V is the rotation speed; The plane composite displacement A is calculated based on the displacement in the x-direction and the displacement in the y-direction in the plane according to the following formula: xy : The eccentricity of the washing tub is calculated using the eccentricity fitting formula according to the composite displacement of the plane and the load weight of the washing tub according to the following formula: f(A,Wt)=aA 2 +bWt 2 +cAWt+dA+eWt+f Wherein, f(A, Wt) is the eccentricity value in the xy plane; A is the composite displacement in the xy plane; Wt is the load weight of the roller; and a to f are all constants.

8. A clothes processing device, characterized in that: include: a memory for storing executable instructions; as well as A processor is configured to be connected to the memory to execute executable instructions to thereby complete the dehydration control method for a clothes processing device according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that A computer program is stored thereon; the computer program is executed by a processor to implement the dehydration control method for a clothes processing device according to any one of claims 1 to 6.

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