A washing machine eccentric load test method and test system

Abstract

The present invention discloses a washing machine overload test method and test system, in which good acceleration, low-speed running speed and low-speed running time are determined, the barrel hit switch triggering time of light load simulation load and heavy load simulation load are recorded respectively, the maximum value is found in the barrel hit switch triggering time of light load, and the minimum value is found in the barrel hit switch triggering time of heavy load, and then a barrel hit switch triggering time distinction point is determined between the two, and then the test is performed with the determined acceleration, low-speed running speed and low-speed running time, and the light load situation or the heavy load situation is distinguished according to the time when the barrel hit occurs, without repeatedly adjusting parameters such as acceleration, low-speed running speed and low-speed running time, which can significantly shorten the overload test time and improve the test efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of washing machines, and in particular relates to a washing machine eccentric load testing method and a testing system. Background Art

[0002] During the dehydration cycle of a pulsator washing machine, especially during the startup phase, if there is an unbalanced load, it may cause the drum to collide with the washing machine, resulting in displacement or damage to the machine body. Therefore, if an unbalanced load occurs during the dehydration cycle, appropriate measures must be taken to avoid further collision with the drum.

[0003] The existing requirements for the dehydration program control of a pulsator washing machine are: for light load conditions, it is allowed to run at high speed even if a drum collision occurs, and the overload problem is alleviated or eliminated by high-speed operation; for heavy load conditions, it is not allowed to run at high speed and stop, and the overload problem is eliminated by subsequent water balancing and other methods.

[0004] Corresponding to this requirement in the dehydration program, in the performance test of the washing machine before leaving the factory, it is necessary to test the control performance of the washing machine under an overload state, that is, to simulate the load condition and test whether the control is generated under light load and heavy load conditions.

[0005] The existing eccentric load test methods are: 1. Use a 3 kg simulated load to simulate a heavy load condition, and a 1.3 kg simulated load to simulate a light load condition;

[0006] 2. Designate several test points in the inner drum of the pulsator washing machine, and place simulated loads on each test point in turn for testing;

[0007] 3. Determine the trigger time range of a barrel bump switch. Take 100ms-300ms as an example. When the trigger time of the barrel bump switch falls within this range, it is considered to be a heavy load situation, otherwise it is considered to be a light load situation.

[0008] 4. After placing a simulated load at a test point, adjust the three parameters of acceleration, low-speed running speed and low-speed maintenance time so that the trigger time of the barrel bumper switch is not within the trigger time range under the simulated load of 1.3 kg, or the trigger time of the barrel bumper switch is within the trigger time range under the simulated load of 3 kg. The load simulation is provided in the above manner and steps, and a heavy load indication signal is generated when the load is heavy, and a light load indication signal is generated when the load is light, so as to test whether the eccentric load control is normal.

[0009] However, in the existing off-center load test method, due to the differences in machines, it is necessary to repeatedly adjust the acceleration, low-speed operation time and low-speed maintenance time to meet the trigger time requirements of the barrel bump switch, which will increase the workload of testers and reduce test efficiency. Summary of the invention

[0010] The present invention proposes a washing machine overload test method and a test system. Different from the existing method of determining the trigger time range of a barrel bump switch and then judging whether the washing machine is heavily loaded or lightly loaded by adjusting acceleration, low-speed running speed and low-speed running time parameters, a barrel bump switch trigger time distinction point is first determined by detecting and comparing the barrel bump switch trigger time, and then the test is performed with the determined acceleration, low-speed running speed and low-speed running time. The light load or heavy load situation is distinguished according to the time when the barrel bump occurs, and there is no need to repeatedly adjust parameters such as acceleration, low-speed running speed and low-speed running time. The overload test time can be significantly shortened and the test efficiency is improved.

[0011] The present invention is implemented by the following technical solutions:

[0012] A washing machine eccentric load test method is proposed, which is applied to the washing machine eccentric load test; wherein, in the washing machine eccentric load test, N eccentric load test points are specified in the inner barrel of the washing machine; the test method comprises:

[0013] After placing a light load simulation load at each eccentric load test point, the washing machine drum is driven to rotate with the initial acceleration, initial low-speed operation speed and initial low-speed operation time, and the light-load drum impact switch triggering time sequence (A1, A2, ..., AN) is recorded;

[0014] After placing a heavy load simulation load at each eccentric load test point, the washing machine drum is driven to rotate with the initial acceleration, initial low-speed operation speed and initial low-speed operation time, and the heavy-load drum impact switch triggering time sequence (B1, B2, ..., BN) is recorded;

[0015] Find the maximum trigger time TA of the light-load bumper switch from the trigger time sequence of the light-load bumper switch, and find the minimum trigger time TB of the heavy-load bumper switch from the trigger time sequence of the heavy-load bumper switch;

[0016] Determine the triggering time distinction point TC of the bumper switch for distinguishing heavy load and light load within the range of (TA, TB);

[0017] Start the eccentric load test with initial acceleration, initial slow-speed operation speed and initial slow-speed operation time;

[0018] Detect the trigger time T of the barrel bump switch, and when T exceeds the trigger time distinction point TC of the barrel bump switch, send a heavy load signal, and when T does not exceed the trigger time distinction point TC of the barrel bump switch, send a light load signal;

[0019] Check the eccentric load test results.

[0020] In some embodiments of the present invention, when determining the triggering time distinction point TC of the barrel bump switch for distinguishing between heavy load and light load, it specifically includes:

[0021] Eliminate the overlapping data in the light-load barrel switch triggering time series and the heavy-load barrel switch triggering time series;

[0022] Find the maximum value TA of the light-load bumper switch trigger time from the light-load bumper switch trigger time sequence after the data is extracted, and find the minimum value TB of the heavy-load bumper switch trigger time from the heavy-load bumper switch trigger time sequence;

[0023] The triggering time differentiation point TC of the bumper switch for distinguishing between heavy load and light load is determined within the range of (TA, TB).

[0024] In some embodiments of the present invention, the method further comprises:

[0025] At each eccentric load test point, record the barrel impact time data m times, and obtain the light load barrel impact switch triggering time series ((A11, A21, …, Am1), (A12, A22, …, Am2), …, (A1N, A2N, …, AmN)) and the heavy load barrel impact switch triggering time series ((B11, B21, …, Bm1), (B12, B22, …, Bm2), …, (B1N, B2N, …, BmN));

[0026] Determine the record ranking j to which the data overlapping in the light-load bumper switch triggering time series and the heavy-load bumper switch triggering time series belong;

[0027] During the start-up of the eccentric load test, the jth barrel collision is shielded and the barrel collision switch triggering time judgment is not performed.

[0028] In some embodiments of the present invention, the triggering time distinction point TC of the barrel bump switch for distinguishing between heavy load and light load is determined within the range of (TA, TB), specifically:

[0029] The triggering time distinction point TC of the barrel bumping switch is randomly determined within the range of (TA+t, TB-t).

[0030] In some embodiments of the present invention, after determining the triggering time distinction point TC of the barrel bump switch for distinguishing between heavy load and light load, the method further includes:

[0031] Write the barrel impact switch triggering time distinction point TC into the eccentric load test program.

[0032] A washing machine eccentric load test system is proposed, comprising:

[0033] Washing machine, used for eccentric load test, with N eccentric load test points designated in its inner drum;

[0034] Simulated load, including light load simulated load and heavy load simulated load;

[0035] The eccentric load test device runs an eccentric load test program for

[0036] After placing a light load simulation load at each eccentric load test point, the washing machine drum is driven to rotate with the initial acceleration, initial low-speed operation speed and initial low-speed operation time, and the light-load drum impact switch triggering time sequence (A1, A2, ..., AN) is recorded;

[0037] After placing a heavy load simulation load at each eccentric load test point, the washing machine drum is driven to rotate with the initial acceleration, initial low-speed operation speed and initial low-speed operation time, and the heavy-load drum impact switch triggering time sequence (B1, B2, ..., BN) is recorded;

[0038] Find the maximum trigger time TA of the light-load bumper switch from the trigger time sequence of the light-load bumper switch, and find the minimum trigger time TB of the heavy-load bumper switch from the trigger time sequence of the heavy-load bumper switch;

[0039] Determine the triggering time distinction point TC of the bumper switch for distinguishing heavy load and light load within the range of (TA, TB);

[0040] Start the eccentric load test with initial acceleration, initial slow-speed operation speed and initial slow-speed operation time;

[0041] Detect the trigger time T of the barrel bump switch, and when T exceeds the trigger time distinction point TC of the barrel bump switch, send a heavy load signal, and when T does not exceed the trigger time distinction point TC of the barrel bump switch, send a light load signal;

[0042] Check the eccentric load test results.

[0043] In some embodiments of the present invention, when determining the triggering time distinction point TC of the barrel impact switch for distinguishing between heavy load and light load, the eccentric load testing device specifically includes:

[0044] Eliminate the overlapping data in the light-load barrel switch triggering time series and the heavy-load barrel switch triggering time series;

[0045] Find the maximum value TA of the light-load bumper switch trigger time from the light-load bumper switch trigger time sequence after removing the data, and find the minimum value TB of the heavy-load bumper switch trigger time from the heavy-load bumper switch trigger time sequence;

[0046] The triggering time differentiation point TC of the bumper switch for distinguishing between heavy load and light load is determined within the range of (TA, TB).

[0047] In some embodiments of the present invention, the eccentric load testing device is used to:

[0048] At each eccentric load test point, record the barrel impact time data m times, and obtain the light load barrel impact switch triggering time series ((A11, A21, …, Am1), (A12, A22, …, Am2), …, (A1N, A2N, …, AmN)) and the heavy load barrel impact switch triggering time series ((B11, B21, …, Bm1), (B12, B22, …, Bm2), …, (B1N, B2N, …, BmN));

[0049] Determine the record ranking j to which the data overlapping in the light-load bumper switch triggering time series and the heavy-load bumper switch triggering time series belong;

[0050] During the start-up of the eccentric load test, the jth barrel collision is shielded and the barrel collision switch triggering time judgment is not performed.

[0051] In some embodiments of the present invention, the eccentric load testing device randomly determines the triggering time distinction point TC of the barrel bumping switch within the range of (TA+t, TB-t).

[0052] In some embodiments of the present invention, the eccentric load testing device, after determining the time distinction point TC of triggering the barrel bump switch for distinguishing between heavy load and light load, writes the time distinction point TC of triggering the barrel bump switch into the eccentric load testing program.

[0053] Compared with the prior art, the advantages and positive effects of the present invention are as follows: in the washing machine plate eccentric load test method and test system proposed by the present invention, the initial acceleration, initial low-speed operation speed and initial low-speed operation time are first determined according to the dehydration curve of the washing machine, and then the barrel collision switch triggering time when a light load simulation load and a heavy load simulation load are placed at the eccentric load test point of the barrel in the washing machine is recorded respectively, and then the maximum value TA of the light load barrel collision switch triggering time is found from the light load barrel collision switch triggering time sequence, and the minimum value TB of the heavy load barrel collision switch triggering time is found from the heavy load barrel collision switch triggering time sequence, and in (TA , TB) within the range, determine the time distinction point TC for the trigger of the bump switch that distinguishes heavy load and light load, and finally start the eccentric load test program with the determined initial acceleration, initial low-speed running speed and initial low-speed running time, detect the trigger time T of the bump switch, and judge whether the washing machine is light load or heavy load according to the size of T. When T exceeds the time distinction point TC for triggering the bump switch, the eccentric load test program generates a heavy load signal. When T does not exceed the time distinction point TC for triggering the bump switch, the eccentric load test program generates a light load signal. The heavy load signal or the light load signal is sent to the washing machine control system. If the eccentric load control is normal, the corresponding normal control will be made according to the heavy load signal or the light load signal generated by the eccentric load test system, such as directly going to high speed under light load. , such as prohibiting high speed or controlling dehydration to stop under heavy load; the washing machine overload test method and test system proposed by the present invention are different from the existing method of determining the trigger time range of the barrel collision switch and then judging whether the washing machine is overloaded or lightly loaded by adjusting the acceleration, low-speed running speed and low-speed running time parameters. First, a barrel collision switch trigger time distinction point is determined by detecting and comparing the barrel collision switch trigger time, and then the test is performed with the determined acceleration, low-speed running speed and low-speed running time. The light load or heavy load situation is distinguished according to the time when the barrel collision occurs. There is no need to repeatedly adjust parameters such as acceleration, low-speed running speed and low-speed running time, which can significantly shorten the overload test time and improve the test efficiency.

[0054] In some embodiments of the present invention, by eliminating the data that overlaps in the light-load bucket switch trigger time sequence with the heavy-load bucket switch trigger time sequence, that is, by eliminating the same bucket switch trigger time data that may overlap in the light-load simulated load case and the heavy-load simulated load case, the accuracy of the bucket switch trigger time distinction point is improved.

[0055] In some embodiments of the present invention, m barrel collision time data are recorded at each eccentric load test point, and then the record ranking of the data overlapping with the heavy load barrel collision switch trigger time sequence in the light load barrel collision switch trigger time sequence is determined; during the start of the eccentric load test, the jth barrel collision is shielded and the barrel collision switch trigger time is not determined, that is, the judgment of the jth barrel collision is not referenced, thereby avoiding the impact on the eccentric load test and further improving the accuracy of the eccentric load test.

[0056] Other features and advantages of the present invention will become more apparent after reading the detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0058] Figure 1 The system architecture of the washing machine eccentric load testing system proposed by the present invention;

[0059] Figure 2 The following is a schematic diagram of the test process of the washing machine eccentric load test method proposed by the present invention;

[0060] Figure 3 The figure is a schematic diagram of the process of performing an eccentric load test in the eccentric load test system for a washing machine provided in the first embodiment of the present invention;

[0061] Figure 4 The figure is a schematic diagram of the process of executing the eccentric load test in the washing machine eccentric load test system provided in the second embodiment of the present invention. DETAILED DESCRIPTION

[0062] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0063] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0064] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0065] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0066] The present invention aims to provide a testing method applied to a washing machine testing stage, which is used to test the eccentric load control of the washing machine, so as to reduce the workload of testers and improve the testing efficiency.

[0067] The washing machine eccentric load test method proposed by the present invention is operated as follows Figure 2 In the washing machine overload test system shown, the test system includes a washing machine 1, a simulated load 2 and an overload test device 3, wherein N overload test points are designated in the inner barrel of the washing machine 1 for overload testing, the simulated load 2 is divided into a light load simulated load 21 and a heavy load simulated load 22, and an overload test program is running in the overload test device 3.

[0068] The controlled eccentric load test device for washing machines is used to perform an eccentric load test by running an eccentric load test program. During the eccentric load test, a simulated load needs to be placed at each eccentric load test point in turn, and then the eccentric load test program is run.

[0069] In the existing overload test technology, a trigger time T0 of a barrel collision switch that distinguishes between heavy load and light load is first determined. After a simulated load is placed at an overload test point, the acceleration, low-speed operation speed and low-speed operation time are repeatedly adjusted to make the barrel collision time of the light load simulated load lower than T0, and the barrel collision time of the heavy load simulated load higher than T0, thereby providing the washing machine with a correct light load and heavy load distinction signal to test whether the overload control of the washing machine is normal.

[0070] However, the existing off-load test technology requires repeated debugging of acceleration, low-speed running speed and low-speed running time to meet the barrel collision time requirements. In the off-load test, there are many test points, and light loads and heavy loads must be tested separately. The workload is originally high. After each load change, the acceleration, low-speed running speed and low-speed running time must be repeatedly debugged, which obviously increases the workload of the test and reduces the test efficiency.

[0071] The present invention first fixes the acceleration, low-speed running speed and low-speed running time of the inner barrel rotation, and then uses a barrel collision switch triggering time point as a distinguishing point to distinguish and judge light loads and heavy loads. There is no need to repeatedly debug the acceleration, low-speed running speed and low-speed running time at each offset load test point, which can significantly improve the test efficiency.

[0072] Specifically, Figure 1 As shown, the washing machine eccentric load testing method proposed by the present invention comprises the following steps:

[0073] Step S1: After placing a light load simulation load at each eccentric load test point, the inner barrel of the washing machine is driven to rotate with the initial acceleration, initial low-speed operation speed and initial low-speed operation time, and the light-load barrel impact switch triggering time sequence is recorded.

[0074] 1) Determine the initial acceleration, initial low-speed operation speed and initial low-speed operation time of the washing machine dehydration curve.

[0075] 2) Place a light simulated load at the i-th eccentric load test point.

[0076] Here, i starts from 1 and ends at N.

[0077] 3) Driving the inner barrel of the washing machine to rotate with the initial acceleration, initial low-speed operation speed and initial low-speed operation time.

[0078] 4) Detect and record the light load impact barrel switch trigger time Ai.

[0079] 5) i+1, return to step 2 until i=N, and obtain the light load barrel switch triggering time sequence (A1, A2, ..., AN).

[0080] Step S2: After placing a heavy load simulation load at an eccentric load test point, the inner barrel of the washing machine is driven to rotate with the initial acceleration, initial low-speed operation speed and initial low-speed operation time, and the triggering time sequence of the heavy load barrel collision switch is recorded.

[0081] 1) Determine the initial acceleration, initial low-speed operation speed and initial low-speed operation time of the washing machine dehydration curve.

[0082] 2) Place a heavy simulated load at the jth eccentric load test point.

[0083] Among them, j starts from 1 and ends at N.

[0084] 3) Driving the inner barrel of the washing machine to rotate with the initial acceleration, initial low-speed operation speed and initial low-speed operation time.

[0085] 4) Detect and record the triggering time Bj of the heavy-load barrel impact switch.

[0086] 5) j+1, return to step 2 until j=N, and obtain the triggering time sequence of the heavy-load barrel switch (B1, B2, ..., BN).

[0087] Step S3: Find the maximum value TA of the light-load bumper switch triggering time from the light-load bumper switch triggering time sequence, and find the minimum value TB of the heavy-load bumper switch triggering time from the heavy-load bumper switch triggering time sequence.

[0088] Find the maximum value TA of the light-load switch triggering time from the light-load barrel switch triggering time series (A1, A2, ..., AN), and find the minimum value TB of the heavy-load barrel switch triggering time from the heavy-load barrel switch triggering time series (B1, B2, ..., BN), TB>TA.

[0089] Step S4: Determine the triggering time distinction point TC of the barrel bump switch for distinguishing between heavy load and light load within the range of (TA, TB).

[0090] TA is the maximum trigger time for a light load simulation to hit the barrel, and TB is the minimum trigger time for a heavy load simulation to hit the barrel. A value between TA and TB is selected as the time point to distinguish between light load and heavy load.

[0091] Step S5: starting the eccentric load test with the initial acceleration, the initial low-speed running speed and the initial low-speed running time.

[0092] After determining the distinction point TC, start the eccentric load test according to the initial acceleration, initial low-speed running speed and initial low-speed running time of the dehydration curve.

[0093] Step S6: Detect the trigger time T of the barrel bumping switch. When T exceeds the trigger time distinction point TC of the barrel bumping switch, a heavy load signal is issued. When T does not exceed the trigger time distinction point TC of the barrel bumping switch, a light load signal is issued.

[0094] Place a test simulated load (which may be a light load or a heavy load) in the washing machine, record the barrel hit switch trigger time T when it hits the barrel, compare T with the barrel hit switch trigger time distinction point TC, and when T exceeds the barrel hit switch trigger time distinction point TC, a heavy load signal is issued; when T does not exceed the barrel hit switch trigger time distinction point TC, a light load signal is issued.

[0095] Step S7: Detect the eccentric load test result.

[0096] The overload test device sends the generated heavy load signal or light load signal to the washing machine controller. The washing machine controller generates corresponding control according to the overload control requirements. For light load conditions, it is allowed to go directly to high speed, and for heavy load conditions, it is not allowed to go to high speed. If the overload control generated by the washing machine meets expectations, the overload test passes. If it does not meet expectations, the overload test fails.

[0097] The washing machine overload test method and test system proposed in the present invention are different from the existing method of determining the trigger time range of the barrel collision switch and then judging whether the washing machine is heavily loaded or lightly loaded by adjusting the acceleration, low-speed running speed and low-speed running time parameters. First, a barrel collision switch trigger time distinction point is determined by detecting and comparing the barrel collision switch trigger time, and then the test is performed with the determined acceleration, low-speed running speed and low-speed running time. The light load and heavy load conditions are distinguished according to the time when the barrel collision occurs. There is no need to repeatedly adjust parameters such as acceleration, low-speed running speed and low-speed running time. The overload test time can be significantly shortened and the test efficiency is improved.

[0098] The eccentric load testing method proposed by the present invention is described in detail below with two specific embodiments.

[0099] Embodiment 1

[0100] The washing machine eccentric load test method provided in this embodiment takes 8 eccentric load test points specified in the inner barrel of the washing machine as an example, that is, N=8. Figure 3 As shown, including:

[0101] Step S31: After placing a light load simulation load at each eccentric load test point, the inner drum of the washing machine is driven to rotate with the initial acceleration, initial low-speed operation speed and initial low-speed operation time, and the light-load drum impact switch triggering time sequence is recorded.

[0102] 1) Determine the initial acceleration, initial low-speed operation speed and initial low-speed operation time of the washing machine dehydration curve.

[0103] 2) Place a light simulated load at the first eccentric load test point.

[0104] 3) Driving the inner barrel of the washing machine to rotate with the initial acceleration, initial low-speed operation speed and initial low-speed operation time.

[0105] 4) Detect and record the light load barrel switch trigger time A1.

[0106] 5) Return to step 2 until the light load barrel switch triggering time sequence (A1, A2, ..., A8) is obtained.

[0107] Step S32: After placing a heavy load simulation load at an eccentric load test point, the inner drum of the washing machine is driven to rotate with the initial acceleration, initial low-speed operation speed and initial low-speed operation time, and the heavy-load drum collision switch triggering time sequence is recorded.

[0108] 1) Determine the initial acceleration, initial low-speed operation speed and initial low-speed operation time of the washing machine dehydration curve.

[0109] 2) Place a heavy simulated load at the first eccentric load test point.

[0110] 3) Driving the inner barrel of the washing machine to rotate with the initial acceleration, initial low-speed operation speed and initial low-speed operation time.

[0111] 4) Detect and record the triggering time B1 of the heavy-load impact barrel switch.

[0112] 5) Return to step 2 until the heavy load barrel switch triggering time sequence (B1, B2, ..., B8) is obtained.

[0113] Step S33: Eliminate the data in the light load barrel bumper switch triggering sequence that overlaps with the heavy load barrel bumper switch triggering time sequence.

[0114] For example, if A1 and A3 in the light load bump switch trigger sequence overlap with B5 and B7 in the heavy load bump switch trigger time sequence, A1 and A3 in the light load bump switch trigger time sequence are removed, and the light load bump switch trigger time sequence is updated to (A2, A4, A5, A6, A7, A8).

[0115] In actual development and design, there are occasional overlaps between the light-load barrel impact time and the heavy-load barrel impact time. By eliminating the overlapping data in the light-load barrel impact switch trigger time series and the heavy-load barrel impact switch trigger time series, that is, eliminating the same barrel impact switch trigger time data that may overlap with the light-load simulated load case and the heavy-load simulated load case, the accuracy of the barrel impact switch trigger time distinction point is improved.

[0116] Step S34: Find the maximum value TA of the light-load barrel bump switch triggering time from the light-load barrel bump switch triggering time sequence after the data is removed, and find the minimum value TB of the heavy-load barrel bump switch triggering time from the heavy-load barrel bump switch triggering time sequence.

[0117] Find the maximum value TA of the light-load bumper switch trigger time from the light-load bumper switch trigger time series (A2, A4, A5, A6, A7, A8), and find the minimum value TB of the heavy-load bumper switch trigger time from the heavy-load bumper switch trigger time series (B1, B2, ..., B8), TB>TA.

[0118] Step S35: Determine the triggering time distinction point TC of the barrel bump switch for distinguishing between heavy load and light load within the range of (TA , TB).

[0119] TA is the maximum trigger time for a light load simulation to hit the barrel, and TB is the minimum trigger time for a heavy load simulation to hit the barrel. A value between TA and TB is selected as the time point to distinguish between light load and heavy load.

[0120] Step S36: Start the eccentric load test with the initial acceleration, initial low-speed running speed and initial low-speed running time.

[0121] After determining the distinction point TC, start the eccentric load test according to the initial acceleration, initial low-speed running speed and initial low-speed running time of the dehydration curve.

[0122] Step S37: Detect the trigger time T of the barrel bumping switch. When T exceeds the trigger time distinction point TC of the barrel bumping switch, a heavy load signal is issued. When T does not exceed the trigger time distinction point TC of the barrel bumping switch, a light load signal is issued.

[0123] Place a test simulated load (which may be a light load or a heavy load) in the washing machine, record the barrel hit switch trigger time T when it hits the barrel, compare T with the barrel hit switch trigger time distinction point TC, and when T exceeds the barrel hit switch trigger time distinction point TC, a heavy load signal is issued; when T does not exceed the barrel hit switch trigger time distinction point TC, a light load signal is issued.

[0124] Step S37: Detect the eccentric load test result.

[0125] The overload test device sends the generated heavy load signal or light load signal to the washing machine controller. The washing machine controller generates corresponding control according to the overload control requirements. For light load conditions, it is allowed to go directly to high speed, and for heavy load conditions, it is not allowed to go to high speed. If the overload control generated by the washing machine meets expectations, the overload test passes. If it does not meet expectations, the overload test fails.

[0126] Embodiment 2

[0127] In this embodiment, the light load simulation load is taken as 1.3 kg, and the heavy load simulation load is taken as 3 kg. At each eccentric load test point, m times of barrel collision time data are recorded to obtain the light load barrel collision switch triggering time series ((A11, A21, ..., Am1), (A12, A22, ..., Am2), ..., (A1N, A2N, ..., AmN)) and the heavy load barrel collision switch triggering time series ((B11, B21, ..., Bm1), (B12, B22, ..., Bm2), ..., (B1N, B2N, ..., BmN)).

[0128] Specifically, in this embodiment, taking m=3 as an example, the time data of hitting the barrel three times is recorded at each eccentric load test point, such as Figure 4 As shown, including:

[0129] Step S41: After placing a light load simulation load at each eccentric load test point, the inner barrel of the washing machine is driven to rotate with the initial acceleration, initial low-speed operation speed and initial low-speed operation time, and the light load barrel collision switch triggering time is recorded to obtain the first group of light load barrel collision switch triggering time series (A11, A12, ..., A1N).

[0130] Step S42: Repeat step S41 twice to obtain a second set of light load barrel bumper switch triggering time sequences (A21, A22, ..., A2N) and a third set of light load barrel bumper switch triggering time sequences (A31, A32, ..., A3N).

[0131] Step S43: After placing a heavy load simulation load at each eccentric load test point, the inner barrel of the washing machine is driven to rotate with the initial acceleration, the initial low-speed operation speed and the initial low-speed operation time, and the triggering time of the heavy load barrel collision switch is recorded to obtain the first group of heavy load barrel collision switch triggering time series (B11, B12, ..., B1N).

[0132] Step S44: Repeat step S43 twice to obtain a second set of heavy-load barrel-slamming switch triggering time sequences (B21, B22, ..., B2N) and a third set of heavy-load barrel-slamming switch triggering time sequences (B31, B32, ..., B3N).

[0133] Step S45: Eliminate the data in the light load barrel bumper switch triggering sequence that overlaps with the heavy load barrel bumper switch triggering time sequence.

[0134] In this embodiment, taking the example that some data in the first group of light-load bucket switch trigger time series intersect or overlap with part of the data in the heavy-load bucket switch trigger time series, the first group of data in the light-load bucket switch trigger time series is eliminated, that is, (A11, A12, ..., A1N) is eliminated, and the light-load bucket switch trigger time series is updated to ((A21, A22, ..., A2N), (A31, A32, ..., A3N)).

[0135] Step S46: Find the maximum value TA of the light-load barrel bump switch triggering time from the light-load barrel bump switch triggering time sequence after the data is removed, and find the minimum value TB of the heavy-load barrel bump switch triggering time from the heavy-load barrel bump switch triggering time sequence.

[0136] Find the maximum value TA of the light-load impact bucket switch trigger time from the light-load impact bucket switch trigger time series ((A21, A22, …, A2N), (A31, A32, …, A3N)), and find the minimum value TB of the heavy-load impact bucket switch trigger time from the heavy-load impact bucket switch trigger time series ((B11, B12, …, B1N), (B21, B22, …, B2N), (B31, B32, …, B3N)), TB>TA.

[0137] Step S47: Determine the triggering time distinction point TC of the barrel bump switch for distinguishing between heavy load and light load within the range of (TA , TB).

[0138] The triggering time distinction point TC of the barrel bumping switch is randomly determined within the range of (TA+t, TB-t), where t is a statistical or empirical value.

[0139] Step S48: Write the barrel impact switch triggering time distinction point TC into the eccentric load test program.

[0140] Step S49: Determine the record ranking j to which the data overlapping in the light-load barrel bumper switch triggering time sequence and the heavy-load barrel bumper switch triggering time sequence belong.

[0141] In this embodiment, the record ranking of the data in the light-load barrel bumper switch triggering time sequence that overlaps with the heavy-load barrel bumper switch triggering time sequence is 1.

[0142] Step S50: starting the eccentric load test with the initial acceleration, initial low-speed running speed and initial low-speed running time, shielding the first barrel collision and not performing the barrel collision switch triggering time judgment.

[0143] Step S51: Based on the second and third barrel collision detection data, the barrel collision switch trigger time T is detected. When T exceeds the barrel collision switch trigger time distinction point TC, a heavy load signal is issued. When T does not exceed the barrel collision switch trigger time distinction point TC, a light load signal is issued.

[0144] Step S51: Detect the barrel collision test result.

[0145] The overload test device sends the generated heavy load signal or light load signal to the washing machine controller. The washing machine controller generates corresponding control according to the overload control requirements. For light load conditions, it is allowed to go directly to high speed, and for heavy load conditions, it is not allowed to go to high speed. If the overload control generated by the washing machine meets expectations, the overload test passes. If it does not meet expectations, the overload test fails.

[0146] In this embodiment, m barrel collision time data are recorded at each eccentric load test point, and then the record ranking of the data overlapping with the heavy load barrel collision switch trigger time sequence in the light load barrel collision switch trigger time sequence is determined; during the start of the eccentric load test, the jth barrel collision is shielded and the barrel collision switch trigger time is not determined, that is, the judgment of the jth barrel collision is not referenced, thereby avoiding the impact on the eccentric load test and further improving the accuracy of the eccentric load test.

[0147] Embodiment 3

[0148] like Figure 2 As shown, this embodiment provides a testing system for the washing machine eccentric load testing method provided in the above embodiment, including:

[0149] A washing machine 1, a simulated load 2 and an eccentric load testing device 3, wherein N eccentric load testing points are designated in the inner barrel of the washing machine 1 for eccentric load testing, the simulated load 2 is divided into a light load simulated load 21 and a heavy load simulated load 22, and an eccentric load testing program is running in the eccentric load testing device 3.

[0150] The controlled eccentric load test device for washing machines is used to perform an eccentric load test by running an eccentric load test program. During the eccentric load test, a simulated load needs to be placed at each eccentric load test point in turn, and then the eccentric load test program is run.

[0151] The eccentric load test procedure operated by the eccentric load test device is used to:

[0152] 1. After placing a light load simulation load at each eccentric load test point, drive the washing machine drum to rotate with the initial acceleration, initial low-speed running speed and initial low-speed running time, and record the light load drum impact switch triggering time sequence (A1, A2, ..., AN);

[0153] 2. After placing a heavy load simulation load at each eccentric load test point, drive the washing machine drum to rotate with the initial acceleration, initial low-speed operation speed and initial low-speed operation time, and record the triggering time sequence of the heavy load drum impact switch (B1, B2, ..., BN);

[0154] 3. Find the maximum trigger time TA of the light-load bumper switch from the trigger time sequence of the light-load bumper switch, and find the minimum trigger time TB of the heavy-load bumper switch from the trigger time sequence of the heavy-load bumper switch;

[0155] 4. Determine the triggering time distinction point TC of the barrel bump switch for distinguishing heavy load and light load within the range of (TA, TB);

[0156] 5. Start the eccentric load test with initial acceleration, initial low-speed running speed and initial low-speed running time;

[0157] 6. Detect the trigger time T of the bump switch. When T exceeds the trigger time distinction point TC of the bump switch, a heavy load signal is issued. When T does not exceed the trigger time distinction point TC of the bump switch, a light load signal is issued.

[0158] 7. Check the eccentric load test results.

[0159] In the embodiment of the present invention, when the unbalanced load testing device 3 determines the time distinction point TC of the barrel hit switch triggering that distinguishes heavy load from light load, the method specifically includes: eliminating the data overlapping with the heavy load barrel hit switch triggering time sequence in the light load barrel hit switch triggering time sequence; finding the maximum value TA of the light load barrel hit switch triggering time from the light load barrel hit switch triggering time sequence after eliminating the data, and finding the minimum value TB of the heavy load barrel hit switch triggering time from the heavy load barrel hit switch triggering time sequence; determining the time distinction point TC of the barrel hit switch triggering that distinguishes heavy load from light load within the range of (TA, TB).

[0160] In an embodiment of the present invention, the eccentric load test device 3 is used to: record m times of barrel collision time data at each eccentric load test point, obtain a light load barrel collision switch triggering time sequence ((A11, A21, ..., Am1), (A12, A22, ..., Am2), ..., (A1N, A2N, ..., AmN)) and a heavy load barrel collision switch triggering time sequence ((B11, B21, ..., Bm1), (B12, B22, ..., Bm2), ..., (B1N, B2N, ..., BmN)); determine the record ranking j to which the data overlapping in the light load barrel collision switch triggering time sequence and the heavy load barrel collision switch triggering time sequence belong; during the start of the eccentric load test, shield the jth barrel collision and do not perform the barrel collision switch triggering time judgment.

[0161] In the embodiment of the present invention, the eccentric load testing device randomly determines the triggering time distinction point TC of the barrel impact switch within the range of (TA+t, TB-t).

[0162] In the embodiment of the present invention, after determining the time distinction point TC of triggering the barrel bump switch for distinguishing between heavy load and light load, the eccentric load test device 3 writes the time distinction point TC of triggering the barrel bump switch into the eccentric load test program.

[0163] It should be noted that, in the specific implementation process, some of the specific controls included above can be implemented in combination with existing control technologies, and are not the part that highlights the creativity of the present invention. The control part can be implemented by a hardware processor executing computer execution instructions in software form stored in a memory, which will not be elaborated here. The programs corresponding to the actions performed by the above-mentioned control circuits can be stored in the computer-readable storage medium of the system in software form, so that the processor can call and execute the operations corresponding to the above modules.

[0164] The computer-readable storage medium mentioned above may include volatile memory, such as random access memory; may also include non-volatile memory, such as read-only memory, flash memory, hard disk or solid-state drive; may also include a combination of the above types of memory.

[0165] The processor mentioned above may also be a general term for multiple processing elements. For example, the processor may be a central processing unit, or other general-purpose processors, digital signal processors, application-specific integrated circuits, field programmable gate arrays or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc., or may be a dedicated processor.

[0166] It should be pointed out that the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A washing machine eccentric load test method, which is applied to the washing machine eccentric load test; wherein: In the washing machine eccentric load test, N eccentric load test points are designated in the washing machine drum; Characterized in that the testing method comprises: After placing a light load simulation load at each eccentric load test point, the washing machine drum is driven to rotate with the initial acceleration, initial low-speed operation speed and initial low-speed operation time, and the light-load drum impact switch triggering time sequence (A1, A2, ..., AN) is recorded; After placing a heavy load simulation load at each eccentric load test point, the washing machine drum is driven to rotate with the initial acceleration, initial low-speed operation speed and initial low-speed operation time, and the heavy-load drum impact switch triggering time sequence (B1, B2, ..., BN) is recorded; Find the maximum trigger time TA of the light-load bumper switch from the trigger time sequence of the light-load bumper switch, and find the minimum trigger time TB of the heavy-load bumper switch from the trigger time sequence of the heavy-load bumper switch; Determine the triggering time distinction point TC of the bumper switch for distinguishing heavy load and light load within the range of (TA, TB); Start the eccentric load test with initial acceleration, initial slow-speed operation speed and initial slow-speed operation time; Detect the trigger time T of the barrel bump switch, and when T exceeds the trigger time distinction point TC of the barrel bump switch, send a heavy load signal, and when T does not exceed the trigger time distinction point TC of the barrel bump switch, send a light load signal; Check the eccentric load test results.

2. The washing machine eccentric load testing method according to claim 1, characterized in that: When determining the triggering time distinction point TC of the barrel bumper switch for distinguishing between heavy load and light load, it specifically includes: Eliminate the overlapping data in the light-load barrel switch triggering time series and the heavy-load barrel switch triggering time series; Find the maximum value TA of the light-load bumper switch trigger time from the light-load bumper switch trigger time sequence after removing the data, and find the minimum value TB of the heavy-load bumper switch trigger time from the heavy-load bumper switch trigger time sequence; The triggering time differentiation point TC of the bumper switch for distinguishing between heavy load and light load is determined within the range of (TA, TB).

3. The washing machine eccentric load testing method according to claim 2, characterized in that: The method further comprises: After placing a light load simulation load at each eccentric load test point, record the barrel collision time data m times at each eccentric load test point to obtain the light load barrel collision switch triggering time sequence ((A11, A21, …, Am1), (A12, A22, …, Am2), …, (A1N, A2N, …, AmN)); After placing a heavy load simulation load at each eccentric load test point, record the barrel collision time data m times at each heavy load test point to obtain the heavy load barrel collision switch triggering time sequence ((B11, B21, ..., Bm1), (B12, B22, ..., Bm2), ..., (B1N, B2N, ..., BmN)); Eliminate the overlapping data in the light-load barrel switch triggering time series and the heavy-load barrel switch triggering time series; Find the maximum value TA of the light-load bumper switch trigger time from the light-load bumper switch trigger time sequence after removing the data, and find the minimum value TB of the heavy-load bumper switch trigger time from the heavy-load bumper switch trigger time sequence; Determine the triggering time distinction point TC of the bumper switch for distinguishing heavy load and light load within the range of (TA, TB); Determine the record ranking j to which the data overlapping in the light-load bumper switch triggering time series and the heavy-load bumper switch triggering time series belong; During the start-up of the eccentric load test, the jth barrel collision is shielded and the barrel collision switch triggering time judgment is not performed.

4. The washing machine eccentric load testing method according to claim 1, characterized in that: Determine the triggering time distinction point TC of the bumper switch for distinguishing heavy load and light load within the range of (TA, TB), specifically: The triggering time distinction point TC of the barrel bumping switch is randomly determined within the range of (TA+t, TB-t).

5. The washing machine eccentric load testing method according to claim 1, characterized in that: After determining the triggering time distinction point TC of the barrel bumping switch for distinguishing between heavy load and light load, the method further includes: Write the barrel impact switch triggering time distinction point TC into the eccentric load test program.

6. A washing machine eccentric load test system, comprising: Washing machine, used for eccentric load test, with N eccentric load test points designated in its inner drum; Simulated load, including light load simulated load and heavy load simulated load; It is characterized by further comprising: The eccentric load test device runs an eccentric load test program for After placing a light load simulation load at each eccentric load test point, the washing machine drum is driven to rotate with the initial acceleration, initial low-speed operation speed and initial low-speed operation time, and the light-load drum impact switch triggering time sequence (A1, A2, ..., AN) is recorded; After placing a heavy load simulation load at each eccentric load test point, the washing machine drum is driven to rotate with the initial acceleration, initial low-speed operation speed and initial low-speed operation time, and the heavy-load drum impact switch triggering time sequence (B1, B2, ..., BN) is recorded; Find the maximum trigger time TA of the light-load bumper switch from the trigger time sequence of the light-load bumper switch, and find the minimum trigger time TB of the heavy-load bumper switch from the trigger time sequence of the heavy-load bumper switch; Determine the triggering time distinction point TC of the bumper switch for distinguishing heavy load and light load within the range of (TA, TB); Start the eccentric load test with initial acceleration, initial slow-speed operation speed and initial slow-speed operation time; Detect the trigger time T of the barrel bump switch, and when T exceeds the trigger time distinction point TC of the barrel bump switch, send a heavy load signal, and when T does not exceed the trigger time distinction point TC of the barrel bump switch, send a light load signal; Check the eccentric load test results.

7. The washing machine eccentric load testing system according to claim 6, characterized in that: When determining the triggering time distinction point TC of the barrel impact switch for distinguishing between heavy load and light load, the eccentric load testing device specifically includes: Eliminate the overlapping data in the light-load barrel switch triggering time series and the heavy-load barrel switch triggering time series; Find the maximum value TA of the light-load bumper switch trigger time from the light-load bumper switch trigger time sequence after removing the data, and find the minimum value TB of the heavy-load bumper switch trigger time from the heavy-load bumper switch trigger time sequence; The triggering time differentiation point TC of the bumper switch for distinguishing between heavy load and light load is determined within the range of (TA, TB).

8. The washing machine eccentric load testing system according to claim 7, characterized in that: The eccentric load testing device is used for: After placing a light load simulation load at each eccentric load test point, record the barrel collision time data m times at each eccentric load test point to obtain the light load barrel collision switch triggering time sequence ((A11, A21, …, Am1), (A12, A22, …, Am2), …, (A1N, A2N, …, AmN)); After placing a heavy load simulation load at each eccentric load test point, record the barrel collision time data m times at each heavy load test point to obtain the heavy load barrel collision switch triggering time sequence ((B11, B21, ..., Bm1), (B12, B22, ..., Bm2), ..., (B1N, B2N, ..., BmN)); Eliminate the overlapping data in the light-load barrel switch triggering time series and the heavy-load barrel switch triggering time series; Find the maximum value TA of the light-load bumper switch trigger time from the light-load bumper switch trigger time sequence after removing the data, and find the minimum value TB of the heavy-load bumper switch trigger time from the heavy-load bumper switch trigger time sequence; Determine the triggering time distinction point TC of the bumper switch for distinguishing heavy load and light load within the range of (TA, TB); Determine the record ranking j to which the data overlapping in the light-load bumper switch triggering time series and the heavy-load bumper switch triggering time series belong; During the start-up of the eccentric load test, the jth barrel collision is shielded and the barrel collision switch triggering time judgment is not performed.

9. The washing machine eccentric load testing system according to claim 6, characterized in that: The eccentric load test device randomly determines the triggering time distinction point TC of the barrel bumping switch within the range of (TA+t, TB-t).

10. The washing machine eccentric load testing system according to claim 6, characterized in that: The eccentric load test device, after determining the time distinction point TC of triggering the barrel bump switch for distinguishing between heavy load and light load, writes the time distinction point TC of triggering the barrel bump switch into the eccentric load test program.

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