WO2020187022A1

WO2020187022A1 - Strength detection method for inner tub of laundry treating device, and inner tub and laundry treating device

Info

Publication number: WO2020187022A1
Application number: PCT/CN2020/077709
Authority: WO
Inventors: 王得军; 王鹏飞; 李斌; 周常彬
Original assignee: 青岛海尔洗衣机有限公司; 海尔智家股份有限公司
Priority date: 2019-03-21
Filing date: 2020-03-04
Publication date: 2020-09-24
Also published as: JP2022524734A; CN111797548B; CN111797548A; JP7094458B2

Abstract

Provided are an inner tub (10), a laundry treating device and a strength detection method for the inner tub (10) of the laundry treating device. The inner tub (10) is provided with a strain sensor (20). The method comprises: acquiring a detection value of the strain sensor (20) and generating an actual stress value; performing, based on the actual stress value, inverse correction on initial finite element analysis pre-processing parameters of the strength of the inner tub (10); executing corrected finite element analysis until the degree of overlap between a stress value of a node corresponding to the strain sensor (20) in a corrected finite element analysis result and the actual stress value is greater than or equal to a set degree of overlap; and generating a strength correction model for the inner tub (10). The influence of the dynamic operating strength of the inner cylinder (10) is fully taken into consideration, and inverse correction is performed on an initial finite element analysis result based on an actual stress value, and therefore, the obtained corrected finite element analysis result is highly consistent with the real situation, and a strength analysis result is more accurate, thereby providing an accurate data basis for subsequent production, maintenance and design; moreover, over the course of the whole test process, the simplification of the structure of the inner tub (10) is not destroyed, and the detection method is more rational and reliable.

Description

Method for detecting strength of inner tube of clothes treatment equipment, inner tube and clothes treatment equipment

Technical field

The invention belongs to the technical field of electrical equipment, and in particular relates to a method for detecting the strength of an inner tube of a clothes treatment device, an inner tube and a clothes treatment device.

Background technique

Clothes processing equipment, such as washing machines, clothes dryers, etc., are provided with inner cylinders. The inner cylinder is the main working part of the clothing treatment equipment, and all the working processes such as washing, rinsing, dehydrating and drying are carried out in it. The structure of the inner cylinder is directly related to the use effect of the laundry treatment equipment. The main structure of the inner cylinder is usually formed by blanking, punching, rolling and welding of thin metal plates. Inevitably, there are button seams on the main structure of the inner cylinder. When the clothes treatment equipment is running, the inner cylinder is driven by the motor at the speed set by the program, especially when the speed is high during dehydration, which requires the strength of the buckle to reach a certain standard to ensure the safety of the clothes treatment equipment.

The prior art usually adopts finite element analysis method to realize the calculation of the buckle seam strength. Finite element analysis, also known as finite element analysis (FEA) or finite element method (FEM), is a method of solving numerical solutions to field problems. Mathematically, a field problem is described by differential equations or integral expressions, and each description can be used in finite element formulations. A ready-made finite element (FE) formulation is included in the general finite element analysis program. The existing technology uses a general finite element analysis program for stress calculation. In addition to this method, the stress can also be calculated by cutting and rolling the sheet metal sample of the inner cylinder body and performing a pull test.

technical problem

Both of the above two methods have certain shortcomings. The former is a static test process, which does not consider the impact of operating conditions, especially the impact of extreme dehydration on the seam strength, and there are certain safety risks. The latter destroys the single verification of the inner cylinder structure, and the data accuracy is limited.

Technical solutions

Aiming at the problem of inaccurate test results of the inner tube strength in the prior art, the present invention designs and discloses a method for detecting the inner tube strength of a clothes treatment device.

A method for detecting the strength of an inner cylinder of a clothing treatment device, wherein a strain sensor is arranged on the inner cylinder, and includes the following steps:

Acquiring the detection value of the strain sensor and generating the actual stress value;

Reversely correct the pre-processing parameters of the initial finite element analysis of the inner cylinder strength based on the actual stress value;

Performing a calibrated finite element analysis until the coincidence degree of the stress value of the node corresponding to the strain sensor in the calibration finite element analysis result and the actual stress value is greater than or equal to the set coincidence degree;

Generate the inner cylinder strength correction model.

Further, the step of obtaining the detection value of the strain sensor and generating the actual stress value includes:

Under the simulated test environment, the detection value of the strain sensor installed at the buckle seam of the inner cylinder body is obtained.

A simulated test environment is a uniform load test environment, and the construction of the uniform load test environment includes the following steps:

Determine the rated load weight of the inner cylinder according to the inner cylinder capacity;

Measure the moisture content of the rated load at the highest speed and calculate the moisture content;

Make a simulated load, where the weight of the simulated load is the sum of the rated load weight and the moisture content;

Uniformly fix the simulated load on the inner wall of the inner cylinder body and surround the inner wall of the inner cylinder body;

Control the clothes processing equipment to work at the highest speed.

Another simulated test environment includes an unbalanced load test environment, and the construction of the unbalanced load test environment includes the following steps:

Determine the maximum eccentric load of the inner cylinder;

Making a simulated load, where the weight of the simulated load is the maximum eccentric load;

Fix the simulated load at the buckle seam of the inner cylinder body;

Control the clothing equipment to work at the highest speed.

In order to achieve accurate detection, the step of obtaining the detection value of the strain sensor and generating the actual stress value further includes:

Wherein, the strain sensor is arranged by the following method:

In the initial finite element analysis results, select the nodes with concentrated stress distribution;

Obtain the coordinates of the nodes where the stress is concentrated;

Strain sensors are symmetrically arranged at the positions of the nodes corresponding to the stress concentration distribution in the inner cylinder.

Further, the step of obtaining the detection value of the strain sensor and generating the actual stress value further includes:

When multiple stress-concentrated nodes are selected from the initial finite element analysis results, a set of strain sensors are set symmetrically at the position of each stress-concentrated node in the inner cylinder;

The strain data detector receives the detection value of each strain sensor, and transmits the detection value to the upper computer, which generates the actual stress value.

As a way of reverse correction, the step of performing reverse correction on the initial finite element analysis pre-processing parameters of the inner cylinder strength based on the actual stress value includes:

Calculate the difference between the actual stress value of each stress concentration distribution point and the corresponding node stress value in the initial finite element analysis result;

Compare multiple differences with preset differences;

When one of the differences is greater than the preset value, one or more parameters in the pre-processing step of the initial finite element analysis are corrected.

As another way of reverse correction, the reverse correction of the initial finite element analysis preprocessing parameters of the inner cylinder strength based on the actual stress value includes:

Input the actual stress value of each stress concentration distribution point as the pre-processing parameter into the mathematical model of the finite element analysis software;

The finite element analysis software obtains a data matrix based on multiple actual stress values;

Calculate the coincidence degree between the initial finite element analysis result and the actual stress value;

Adjust the pre-processing parameters in the initial finite element analysis according to the coincidence degree.

Compared with the prior art, the advantages and positive effects of the present invention are:

The method for detecting the strength of the inner cylinder of the laundry treatment equipment disclosed in the present invention, on the one hand, fully considers the influence of the dynamic operation of the inner cylinder on the strength, and performs reverse correction on the initial finite element analysis result based on the actual stress value, and the obtained correction finite element analysis result is consistent with The real situation has a high degree of convergence, the strength analysis results are more accurate and provide an accurate data basis for subsequent production, maintenance and design; on the other hand, the unity of the inner cylinder structure is not destroyed during the entire test process, and the detection method is more reasonable and reliable.

At the same time, an inner cylinder is also disclosed. The inner cylinder detects the strength by the following methods, including:

Generate the inner cylinder strength correction model.

In the inner cylinder provided by the present invention, both static and dynamic conditions are fully considered when the strength is detected, and the design accuracy is higher.

The present invention further discloses a clothing treatment equipment, which adopts the following method to detect the strength of the inner cylinder, and the method includes the following steps:

Generate the inner cylinder strength correction model.

Beneficial effect

The laundry treatment equipment disclosed in the present invention has the advantages of safety and reliability.

After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become clearer.

Description of the drawings

In order to explain the technical solutions in the embodiments of the present invention more clearly, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative work, other drawings can be obtained based on these drawings.

Figure 1 is a schematic diagram of the structure of the clothes processing equipment when the inner cylinder strength is detected;

Fig. 2 is a schematic block diagram of signal transmission when the clothes processing equipment performs inner cylinder strength detection;

Figure 3 is a flow chart of the method for detecting the strength of the inner cylinder of the laundry treatment device disclosed in the present invention;

Figure 4 is a flowchart of building a uniform load test environment;

Figure 5 is a flow chart for constructing an off-load test environment.

Embodiments of the invention

In order to make the objectives, technical solutions and advantages of the present invention clearer, the following will further describe the present invention in detail with reference to the accompanying drawings and embodiments.

It should be noted that in the description of the present invention, the terms “upper”, “lower”, “left”, “right”, “vertical”, “horizontal”, “inner”, “outer”, etc. indicate directions or positions The term of relationship is based on the direction or position relationship shown in the drawings, which is only for ease of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as Restrictions on the invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.

Fig. 1 is a schematic illustration of a laundry treatment device, which in this embodiment is a washing machine. However, those of ordinary skill in the art can understand without any doubt that other household/commercial washing machines, dryers, washer dryers, and other laundry treatment equipment suitable for the present invention will also be included in the protection of the present invention. Within range.

The washing machine has several basic components: washing part, transmission part, supporting part, water supply and drainage part and operation control part. Among them, the washing part mainly includes main parts such as an inner tube 10 and an outer tube. The transmission part includes the pulsator 14, the motor, the pulley and the belt components, and the supporting part includes the shock absorber, the outer box, and the foot. The operation control part includes the main controller, water level controller and temperature controller. Referring to Figure 1, the inner cylinder 10 in the washing component is composed of an inner cylinder body 11, a bottom plate 12, and a balance ring 13, among which the inner cylinder body 11 is formed by blanking, punching, and rolling a polished metal sheet A buckle seam 15 is formed at the overlap of the metal sheet. The bottom plate 12 is also formed by punching a polished metal thin plate, and the inner cylinder body 11 and the bottom plate 12 are welded into one body. When washing, the washing liquid enters the inner tube 10 through the holes opened in the inner tube body 11 to soak and wash the clothes; when dehydrating, the residual liquid on the clothes is thrown out through these small holes.

In this embodiment, testing the strength of the inner cylinder mainly refers to testing the buckle formed when the inner cylinder body is rolled. However, those of ordinary skill in the art can understand without any doubt that under certain conditions, other unspecified seams formed on the inner cylinder, such as the weld between the inner cylinder body and the bottom plate, and other similar clothing treatments The weld in the equipment will also be included in the protection scope of the present invention.

As shown in Fig. 3, when the strength of the inner cylinder is detected in this embodiment, the finite element analysis result is reverse corrected based on the actual stress value of the stress concentration area under the dynamic operating conditions of the inner cylinder, and the corrected finite element analysis result is obtained, so that The corrected finite element analysis result is close to the real stress distribution, which is basically equivalent to the real stress distribution, so as to provide a reliable data basis for subsequent design, production, and maintenance. Specifically, it includes the following steps: Obtain the detection value of the strain sensor (shown as 20 in Figure 1) installed on the inner cylinder, and transform the collected detection value into the actual stress of the inner cylinder where the strain sensor is installed value. After the actual stress value is obtained, the pre-processing parameters of the initial finite element analysis in the static state are reversely corrected. Perform a calibrated finite element analysis. If the overlap between the stress value of the node corresponding to the strain sensor in the calibrated finite element analysis result and the actual stress value generated is greater than or equal to the set overlap, the inner cylinder strength calibration model is generated based on the calibrated finite element analysis result . If the coincidence degree between the stress value of the node corresponding to the strain sensor and the actual stress value generated in the corrected finite element analysis result is less than the set coincidence degree, the initial finite element analysis pre-processing parameters in the static state shall be reverse corrected again and the correction shall be performed For finite element analysis, repeat the above steps until the overlap between the stress value of the node corresponding to the strain sensor in the finite element analysis result and the actual stress value generated is greater than or equal to the set overlap. The strain sensor 20 is preferably arranged at the button seam 15 of the inner cylinder body. The set coincidence degree can be adjusted according to the actual production accuracy requirements.

In order to accurately detect the strength of the inner cylinder, the initial finite element analysis of the inner cylinder is performed first. The initial finite element analysis is mainly used to detect the strength of the inner cylinder under static conditions. The initial finite element analysis includes two steps: pre-processing and numerical analysis. In the pre-processing, first input data describing the geometry of the inner cylinder, material properties, loads and boundary conditions. Next, enter the element type and element density, and the existing finite element analysis software will automatically divide the finite element mesh. In this step, it is necessary to select and determine one or more element formulations to adapt to the mathematical model in the finite element analysis software, and determine the size of the element in the selected area of the finite element model. Further into the numerical analysis, the finite element analysis software generates a matrix describing the performance of the unit according to the pre-processing parameters, and combines these matrices into a large number of matrix equations representing the finite element structure, and then solves them. In this embodiment, the field value at each node of the inner cylinder, that is, the stress value at each node, is obtained, that is, the initial finite element analysis result.

In order to provide an accurate data basis for reverse correction, the initial finite element analysis results are first screened, and the nodes where the stress is concentrated are selected. An optional screening method is to set a preset stress value. The stress value of each node in the initial finite element analysis result is compared with the preset stress value. When the stress value of a certain node is greater than the preset stress value, the corresponding node is screened out as the node with concentrated stress distribution. The node where the stress is concentrated is the location where the stress in the inner cylinder increases locally. At the nodes where the stress is concentrated, the inner cylinder body is prone to fatigue cracks or static load fractures.

After selecting the nodes where the stress is concentrated, the coordinates of the nodes where the stress is concentrated are obtained. The specific position in the inner cylinder corresponding to the node of the stress concentration distribution is further obtained, and a strain sensor 20 is respectively provided on both sides of the position of the inner cylinder corresponding to one of the stress concentration distribution points. The strain sensor 20 is a sensor based on measuring the strain produced by the deformation of an object under a force. Resistance strain gauge is one of the most commonly used sensing elements. It is a sensing element that can convert changes in strain on mechanical components into changes in resistance, thereby converting changes in stress into electrical signals. The strain sensor 20 can communicate with the upper computer to output the detection signal, and the upper computer generates the actual stress value. The communication between the strain sensor and the host computer can be wired communication or wireless communication. The communication protocol is not further limited here, and it can be used in the field of Internet of Things or the communication protocol between sensors and data processing equipment in the prior art To choose from.

According to the results of the initial finite element analysis, there may be multiple stress-concentrated nodes in the inner cylinder body, especially the buckle seam of the inner cylinder body, and the coordinates of multiple stress-concentrated nodes are obtained. In view of this situation, at least two strain sensors are preferably arranged symmetrically around the position in the inner cylinder corresponding to each stress concentration point. The more the number of strain sensors deployed and the more detection values generated, the more the analysis results will be more realistic and the higher the credibility. However, due to the limitation of the number of test equipment interfaces and the amount of data processing, it is usually preferable to select two or four nodes with concentrated stress distribution. A strain sensor is respectively arranged on both sides of the inner cylinder position of each node corresponding to the stress concentration distribution. The "both sides" defined here refers to the left and right sides of the reference direction based on the coordinates of the selected stress concentration distribution node and the radial direction of the inner cylinder body. As shown in FIG. 1, since multiple strain sensors are provided, in order to facilitate data transmission, each strain sensor 20 is connected to a strain data detector 30 arranged on the central axis of the inner cylinder bottom plate 12 through a communication cable. As shown in FIG. 2, the strain data detector 30 is used to receive the detection value of each strain sensor 20 and transmit the detection value to the upper computer 40 through wired or wireless communication. The strain data detector 30 and the host computer 40 preferably adopt USB serial communication or WIFI wireless communication. The upper computer 40 stores a data processing program that converts the detection value into a dynamic detection result, that is, the actual stress value. The upper computer 40 can be a computer with data processing capabilities, or a mobile terminal represented by mobile phones and tablets, or a server or remote server, or even a wearable device with data processing capabilities. Further limit.

After the strain sensor is installed in the inner cylinder body, the test environment is further simulated. The test environment is mainly to simulate various operating states of the washing machine. In particular, it simulates its running state during high-speed dehydration to test the strength of the inner cylinder body under extreme conditions, especially the buckle seam. Preferably, at least two simulated test environments are created. The first is a uniform load test environment. As shown in Figure 4, the construction of a uniform load test environment includes the following steps: determine the rated load weight of the inner cylinder according to the inner cylinder capacity; determine the moisture content of the rated load at the highest speed, and calculate the moisture weight; make a simulated load, and simulate the weight of the load It is the sum of the rated load weight and the moisture weight, and the simulated load is evenly fixed on the inner wall of the inner tube body and around the inner wall of the inner tube body to control the washing machine to work at the highest speed, such as working in the dehydration mode and maintaining the highest speed, that is, uniform load Simulate the test environment. The moisture content is the ratio of the moisture content in the rated load to the total weight. To determine the moisture content of the rated load at the highest speed, an existing measurement method in the prior art is selected, which is not limited here. The simulated load is preferably made of rubber material. The second is the eccentric load test environment. As shown in Figure 5, the construction of an eccentric load test environment includes the following steps: During the dehydration process, the maximum eccentric load of the inner cylinder is measured, and the load weight under the eccentric load can be withstood. When determining the maximum eccentric load of the inner cylinder, care must be taken to ensure that the inner cylinder does not collide with the safety boom. Make a simulated load, the weight of the simulated load is the maximum eccentric load, and the simulated load is fixed at the buckle seam of the inner cylinder body; the simulated load is preferably distributed symmetrically along the buckle seam of the inner cylinder body and completely covers the buckle seam. Control the washing machine to work at the highest speed, such as controlling the washing machine to work in the dehydration mode and maintain the highest speed, that is, the partial load test environment.

The host computer obtains the detection values of multiple strain sensors in each simulated test environment, and performs data processing to generate the actual stress values of the points where the stress is concentrated. The actual stress value is used to reversely correct the initial finite element analysis results. There are also two methods for reverse correction. The first reverse correction includes the following steps: calculate the difference between the actual stress value of each stress concentration distribution point and the corresponding node stress value in the corresponding initial finite element analysis result, and add more The difference is compared with the preset difference. When one of the differences is greater than the preset difference, the coincidence degree of the two is considered to be less than the set coincidence degree. Correct one or more parameters in the pre-processing step of the initial finite element analysis. Parameters include but are not limited to the inner cylinder geometry, load and boundary condition data, element density, and perform corrected finite element analysis, calculate the actual stress value of each stress concentration distribution point and the corresponding node in the corresponding corrected finite element analysis result The difference between the stress values, and compare multiple differences with preset differences. If multiple differences are less than or equal to the preset difference, that is, the coincidence degree between the two is greater than or equal to the set coincidence degree, and meets the expected requirements, save the corrected finite element analysis result, and use the corrected finite element analysis result as the washing machine The analysis result of the cylinder strength will be further used as the data basis for subsequent maintenance, production and design. If all the strain sensors are set at the buckle seam, the result is the analysis result of the seam strength of the inner cylinder of the washing machine. If at least one of the differences is greater than the preset difference, it is considered that the degree of coincidence between the two is still less than the set degree of coincidence, and one or more of the preprocessing steps of the initial finite element analysis are corrected again Parameters, perform the corrected finite element analysis again until all differences are less than or equal to the preset differences. The second type of reverse correction includes the following steps: input the actual stress value of each stress concentration distribution point as a pre-processing parameter into the mathematical model of the finite element analysis software, and the finite element analysis software automatically obtains a simple data based on multiple actual stress values The matrix is further used to calculate the coincidence degree of the initial finite element analysis result and the actual stress value through approximation and fitting. According to the coincidence degree, the pre-processing parameters in the initial finite element analysis are automatically adjusted and the finite element analysis is corrected until the finite element analysis is corrected. The coincidence degree between the result and the actual stress value reaches the set coincidence degree, that is, greater than or equal to the set coincidence degree, and the two approach infinitely. Save the corrected finite element analysis result, and use the corrected finite element analysis result as the strength of the washing machine inner cylinder The result of the analysis is to generate the inner cylinder strength correction model as the data basis for subsequent maintenance, production and design. The inner cylinder strength correction model can be a cloud image, a data table or a database.

In the above embodiment, the installation position of the strain sensor is based on the initial finite element analysis result. In fact, the phenomenon of local increase in stress generally occurs in places where the shape of the inner cylinder changes sharply, such as notches, holes, grooves, and rigid constraints. Therefore, the strain sensors can also be directly installed at the buckle seam of the inner cylinder body, and they are evenly distributed in four rows along the axial direction from the front end plate to the bottom plate. Each row includes two buckles arranged symmetrically with the buckle seam as the center line. Strain sensors on both sides of the seam, and calculate the average value of the detected stress value of each row of strain sensors, and use the average value as the actual stress value. This way is a simplified way.

The method for detecting the strength of the inner cylinder of the clothing treatment equipment disclosed in the present invention, on the one hand, fully considers the impact of the dynamic operation of the inner cylinder on the buckle seam strength, and performs reverse correction on the initial finite element analysis result based on the actual stress value, and the obtained correction finite element analysis The result is highly convergent with the real situation, the strength analysis result is more accurate, and an accurate data basis for subsequent production, maintenance and design is generated; on the other hand, the unity of the inner cylinder structure is not destroyed during the entire test process, and the detection method is more reasonable reliable.

The present invention also discloses an inner tube for a laundry treatment device, wherein the strength of the inner tube is detected using the inner tube strength detection method described in detail in the above embodiment. For the detailed steps of the method for detecting the strength of the inner cylinder, refer to the detailed description and depiction of the above-mentioned embodiment and the accompanying drawings, and will not be repeated here. The same technical effect can be achieved by adopting the above-mentioned intensity detection method to detect the inner cylinder.

The present invention also discloses a clothes treatment device, wherein the strength of the inner tube in the clothes treatment device is detected using the inner tube strength detection method described in detail in the above embodiment. For the detailed steps of the method for detecting the strength of the inner cylinder, refer to the detailed description and depiction of the above-mentioned embodiment and the accompanying drawings, and will not be repeated here. The laundry treatment equipment adopting the above-mentioned intensity detection method can achieve the same technical effect.

The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, for those of ordinary skill in the art, the technical solutions of the foregoing embodiments can still be described. The recorded technical solutions are modified, or some of the technical features are equivalently replaced; these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by the present invention.

Claims

A method for detecting the strength of an inner cylinder of a clothing treatment device, characterized in that a strain sensor is arranged on the inner cylinder, and includes the following steps:

Acquiring the detection value of the strain sensor and generating the actual stress value;

Reversely correct the pre-processing parameters of the initial finite element analysis of the inner cylinder strength based on the actual stress value;

Performing a calibrated finite element analysis until the coincidence degree of the stress value of the node corresponding to the strain sensor in the calibration finite element analysis result and the actual stress value is greater than or equal to the set coincidence degree;

Generate the inner cylinder strength correction model.
The method for detecting the strength of the inner cylinder of the clothes treatment device according to claim 1, wherein the step of obtaining the detection value of the strain sensor and generating the actual stress value comprises:

Under the simulated test environment, the detection value of the strain sensor installed at the buckle seam of the inner cylinder body is obtained.
The method for detecting the strength of the inner cylinder of a laundry treatment device according to claim 2, wherein the simulated test environment comprises a uniform load test environment, and the construction of the uniform load test environment includes the following steps:

Determine the rated load weight of the inner cylinder according to the inner cylinder capacity;

Measure the moisture content of the rated load at the highest speed and calculate the moisture content;

Make a simulated load, where the weight of the simulated load is the sum of the rated load weight and the moisture content;

Uniformly fix the simulated load on the inner wall of the inner cylinder body and surround the inner wall of the inner cylinder body;

Control the clothes processing equipment to work at the highest speed.
The method for detecting the strength of the inner cylinder of a laundry treatment device according to claim 2, wherein the simulated test environment comprises an unbalanced load test environment, and constructing the unbalanced load test environment comprises the following steps:

Determine the maximum eccentric load of the inner cylinder;

Making a simulated load, the weight of the simulated load being the maximum eccentric load;

Fix the simulated load at the buckle seam of the inner cylinder body;

Control the clothing equipment to work at the highest speed.
The method for detecting the strength of the inner cylinder of a laundry treatment device according to any one of claims 3 or 4, wherein:

The step of obtaining the detection value of the strain sensor and generating the actual stress value further includes:

Wherein, the strain sensor is arranged by the following method:

In the initial finite element analysis results, select the nodes with concentrated stress distribution;

Obtain the coordinates of the nodes where the stress is concentrated;

Strain sensors are symmetrically arranged at the positions of the nodes corresponding to the stress concentration distribution in the inner cylinder.
The method for detecting the strength of the inner cylinder of the clothes treatment equipment according to claim 5, wherein: the step of obtaining the detection value of the strain sensor and generating the actual stress value further comprises:

When multiple stress-concentrated nodes are selected from the initial finite element analysis results, a set of strain sensors are set symmetrically at the position of each stress-concentrated node in the inner cylinder;

The strain data detector receives the detection value of each strain sensor and transmits the detection value to the upper computer, which generates the actual stress value.
The method for detecting the strength of the inner cylinder of a clothes treatment device according to claim 6, wherein:

The step of performing reverse correction on the initial finite element analysis pre-processing parameters of the inner cylinder strength based on the actual stress value includes:

Calculate the difference between the actual stress value of each stress concentration distribution point and the corresponding node stress value in the initial finite element analysis result;

Compare multiple differences with preset differences;

When one of the differences is greater than the preset value, one or more parameters in the pre-processing step of the initial finite element analysis are corrected.
The method for detecting the strength of the inner cylinder of a clothes treatment device according to claim 6, wherein:

The reverse correction of the initial finite element analysis pre-processing parameters of the inner cylinder strength based on the actual stress value includes:

Input the actual stress value of each stress concentration distribution point as the pre-processing parameter into the mathematical model of the finite element analysis software;

The finite element analysis software obtains a data matrix based on multiple actual stress values;

Calculate the coincidence degree between the initial finite element analysis result and the actual stress value;

Adjust the pre-processing parameters in the initial finite element analysis according to the coincidence degree.
An inner tube of a clothes treatment device, characterized in that the method for detecting the strength of the inner tube of a clothes treatment device according to any one of claims 1 to 8 is adopted.
A clothing treatment device, characterized in that the method for detecting the strength of the inner cylinder of the clothing treatment device according to any one of claims 1 to 8 is adopted.