CN104452187A - Roller washing machine and unbalance detection method and device thereof - Google Patents
Roller washing machine and unbalance detection method and device thereof Download PDFInfo
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Abstract
The invention belongs to the field of detection and control technologies of washing machines and provides a roller washing machine and an unbalance detection method and device of the roller washing machine. The method comprises the steps that when a roller operates at a low uniform velocity, the torque of the roller is detected, and the average value of torque ripple is acquired; afterwards, when the roller operates in a constant-acceleration mode, the torque ripple values of the roller are acquired in real time, and whether dynamic unbalance happens on the roller or not is judged according to the average value of torque ripple and the torque ripple values; if yes, the roller is controlled to stop accelerated operation, and whether the frequency of shake scattering operations executed by the roller is larger than a preset frequency value or not is judged; if yes, the roller is controlled to stop operation; if not, the roller is controlled to execute shake scattering operations and then operates at a low velocity, and static unbalance detection is performed on the roller during low-velocity operation of the roller; accordingly, there is no need to adopt sensors for unbalance detection, so that the cost and detection difficulty are lowered; besides, the problem that dynamic unbalance detection is performed during high-velocity operation of the roller, so that mechanical parts are collided and damaged is avoided.
Description
Technical field
The invention belongs to washing machine detection control technical field, particularly relate to a kind of roller washing machine and unbalance detection thereof and device.
Background technology
In roller washing machine, when the cylinder that variable-frequency motor drives is uneven, the rotating speed of variable-frequency motor is higher, then the vibration & noise of system will be larger, thus can reduce the service life of roller washing machine.Variable-frequency motor has laod unbalance measuring ability, when finding that load (as cylinder) is uneven, by adjusting rotating speed or changing the non-equilibrium state of load, to reach the object of the vibration & noise of reduction system.
Prior art provides following two kinds of unbalance detections:
(1) whether by adopting sensor to balance cylinder and detect, but the cost of sensor is higher and be not easy to install, thus causes detection difficulty large.
(2) by judging whether cylinder balances in low cruise stage and high-speed cruising stage according to the rotating speed of variable-frequency motor or torque; But, this method is carried out cannot realizing dynamic unbalance when static unbalance detects in the low-speed running stage (motor travels at the uniform speed according to fixing rotary speed) to cylinder is simultaneously detected, and run up in the stage of running up due to cylinder, in the process of running up, carry out dynamic unbalance detection the mechanical part of washing machine internal can be made to collide and cause washing machine to be damaged.
In sum, prior art exists that cost is high, detection difficulty is large, cannot carry out dynamic unbalance detection to cylinder in the low cruise stage and carry out dynamic unbalance in the high-speed cruising stage detecting and easily making the mechanical part of washing machine internal occur the problem of impaction lesion.
Summary of the invention
The object of the present invention is to provide a kind of roller washing machine unbalance detection, be intended to solve that cost existing for prior art is high, detection difficulty large, dynamic unbalance detection cannot be carried out to cylinder in the low-speed running stage and carry out dynamic unbalance in the stage of running up detecting and easily making the mechanical part of washing machine internal occur the problem of impaction lesion.
The present invention is achieved in that a kind of roller washing machine unbalance detection, and it comprises the following steps:
A. when cylinder low-speed running, static unbalance detection is carried out to cylinder;
If B. described cylinder static unbalance does not exceed prescribed threshold, then the torque of described cylinder detected and obtain torque ripple mean value;
C. carry out in the process of accelerated service at described cylinder according to constant acceleration, the torque ripple value of cylinder described in Real-time Obtaining, and judge whether described cylinder occurs dynamic unbalance according to described torque ripple mean value and described torque ripple value, be, then perform step D, no, then perform step H;
D. control described cylinder and stop accelerated service;
E. judge whether the executed number of operations that shakes loose of described cylinder is greater than preset times value, is, perform step F, no, then perform step G;
F. control described cylinder to shut down;
G. control the execution of described cylinder shake loose operation and carry out low-speed running subsequently, and return execution steps A;
H. control described cylinder according to default washing procedure to remain in operation.
Present invention also offers the uneven checkout gear of a kind of roller washing machine, it comprises:
The fluctuation of static unbalance detection module, low speed torque acquisition module, dynamic unbalance judge module, cylinder control module and shake loose number of times judge module;
Described static unbalance detection module is used for carrying out static unbalance detection when cylinder low-speed running to cylinder;
If described low speed torque fluctuation acquisition module is used for cylinder static unbalance and does not exceed prescribed threshold, then the torque of described cylinder detected and obtain torque ripple mean value;
Described dynamic unbalance judge module is used for carrying out in the process of accelerated service at described cylinder according to constant acceleration, the torque ripple value of cylinder described in Real-time Obtaining, and judge whether described cylinder occurs dynamic unbalance according to described torque ripple mean value and described torque ripple value;
When the judged result of described dynamic unbalance judge module is for being, described cylinder control module stops accelerated service for controlling described cylinder;
The described number of times judge module that shakes loose is for judging whether the executed number of operations that shakes loose of cylinder is greater than preset times value; When judged result is for being, described cylinder control module also shuts down for controlling described cylinder; When judged result is no, described cylinder control module also shakes loose operation for controlling the execution of described cylinder and carries out low-speed running subsequently, and drives the work of described static unbalance detection module;
When the judged result of described dynamic unbalance judge module is no, described cylinder control module also remains in operation for controlling described cylinder according to default washing procedure.
Present invention also offers a kind of roller washing machine, it comprises cylinder and the uneven checkout gear of above-mentioned roller washing machine.
Roller washing machine is being carried out in the uneven process detected, the present invention is when cylinder at the uniform velocity operates according to low speed, the torque of cylinder is detected and obtains torque ripple mean value, then when cylinder carries out accelerated service according to constant acceleration, the torque ripple value of Real-time Obtaining cylinder, and judge whether cylinder occurs dynamic unbalance according to described torque ripple mean value and this torque ripple value, if, then index drum stops accelerated service, and judge whether the executed number of operations that shakes loose of cylinder is greater than preset times value, be, then index drum shuts down, no, then index drum performs and shakes loose operation and carry out low-speed running subsequently, and when cylinder low-speed running, static unbalance detection is carried out to it, detect without the need to adopting sensor to carry out imbalance in the process, reduce cost and detection difficulty, and dynamic unbalance detection can be carried out when cylinder low-speed running and accelerated service, avoid and carry out dynamic unbalance detection when cylinder runs up and cause mechanical part to occur the problem of impaction lesion.
Accompanying drawing explanation
Fig. 1 is the realization flow figure of the roller washing machine unbalance detection that the embodiment of the present invention provides;
Fig. 2 is another realization flow figure of the roller washing machine unbalance detection that the embodiment of the present invention provides;
Fig. 3 is the Parameters variation oscillogram involved by roller washing machine unbalance detection that the embodiment of the present invention provides;
Fig. 4 is the Parameters variation oscillogram involved by roller washing machine unbalance detection that the embodiment of the present invention provides;
Fig. 5 is the Parameters variation oscillogram involved by roller washing machine unbalance detection that the embodiment of the present invention provides;
Fig. 6 is the Parameters variation oscillogram involved by roller washing machine unbalance detection that the embodiment of the present invention provides;
Fig. 7 is the structure chart of the uneven checkout gear of roller washing machine that the embodiment of the present invention provides.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Fig. 1 shows the realization flow of the roller washing machine unbalance detection that the embodiment of the present invention provides, and for convenience of explanation, illustrate only the part relevant to the embodiment of the present invention, details are as follows:
In step sl, when cylinder low-speed running, static unbalance detection is carried out to cylinder.
Wherein, in the process of cylinder low-speed running, need first to carry out static unbalance detection to cylinder, if static unbalance appears in cylinder, then cannot carry out dynamic unbalance detection, so need could perform step S2 when cylinder is in static balancing.Above-mentionedly mentioned static unbalance is carried out to cylinder detect same as the prior art, therefore repeat no more.
In step s 2, if cylinder static unbalance does not exceed prescribed threshold, then the torque of cylinder detected and obtain torque ripple mean value.
Wherein, above-mentioned prescribed threshold is that whether reaching for the static unbalance degree weighing cylinder of presetting needs execution to shake loose operation with the reference value restored balance.
In above-mentioned steps S2, the torque of cylinder to be detected and the step obtaining torque ripple mean value specifically comprises the following steps:
Within the time that cylinder often rotates a circle, the torque of cylinder is detected in real time, and obtain single-revolution torque ripple value according to the maximum of detected torque and minimum of a value;
Mean operation is carried out to obtain torque ripple mean value to multiple single-revolution torque ripple values accessed in the process in drum rotating many weeks.
It should be noted that: the maximum of the torque detected by above-mentioned basis and minimum of a value obtain single-revolution torque ripple value and the maximum of detected torque and minimum of a value carried out asking difference operation and obtain torque ripple value in fact exactly herein.Above-mentioned, mean operation is carried out to obtain in the process of torque ripple mean value to multiple single-revolution torque ripple values accessed in the process in drum rotating many weeks, the plurality of single-revolution torque ripple value can be each accessed single-revolution torque ripple value when rollers running a few week, such as: when rollers running 4 weeks, 4 single-revolution torque ripple values accessed in these 4 weeks are carried out mean operation to obtain torque ripple value.
In step s3, carry out in the process of accelerated service at cylinder according to constant acceleration, the torque ripple value of Real-time Obtaining cylinder, and judge whether cylinder occurs dynamic unbalance, is according to above-mentioned torque ripple mean value and this torque ripple value, then perform step S4, no, then perform step S8.
Wherein, in above-mentioned steps S3, the step of the torque ripple value of Real-time Obtaining cylinder is specially:
Within the time that cylinder often rotates a circle, the torque of cylinder is detected, and obtain torque ripple value according to the maximum of detected torque and minimum of a value.
It should be noted that: the maximum of detected torque and minimum of a value carry out asking difference operation and obtain torque ripple value by process that the maximum of the torque detected by above-mentioned basis and minimum of a value obtain torque ripple value in fact exactly herein.
Judge whether cylinder occurs that the step of dynamic unbalance specifically comprises the following steps according to above-mentioned torque ripple mean value and this torque ripple value in above-mentioned steps S3:
Torque ripple value and torque ripple mean value are carried out asking difference operation to obtain torque ripple difference;
Judging whether torque ripple difference is greater than and preset fluctuation threshold value, is judge that dynamic unbalance appears in cylinder, no, then judge that dynamic unbalance does not appear in cylinder.
It should be noted that: above-mentioned default fluctuation threshold value refers to the torque ripple reference value whether occurring dynamic unbalance for weighing cylinder preset herein.
In step s 4 which, index drum stops accelerated service.
In step s 5, judge whether the executed number of operations that shakes loose of cylinder is greater than preset times value, is, then perform step S6, no, then perform step S7.
In step s 6, index drum shuts down.
In the step s 7, index drum performs and shakes loose operation and carry out low-speed running subsequently, and returns execution step S1.
Wherein, shake loose operation and refer to that cylinder carries out the homodisperse operation of current institute's washing product shaking its inside is held under the control of motor, shake loose operation by execution and cylinder can be made to restore balance; Preset times value refer to preset shake loose number of operations, it shakes loose the number of times whether operation has reached regulation for weighing performed by roller washing machine, if, then show that the dynamic unbalance of cylinder cannot shake loose operation by execution and solve, need to shut down to avoid the parts in roller washing machine to be damaged; If not, then index drum execution can shake loose operation to make cylinder restore balance, then static unbalance detection is carried out to cylinder by step S1 when cylinder low-speed running, and then when cylinder is in static balancing repeated execution of steps S2 to S3, if cylinder is in dynamic equilibrium, just step S8 can be performed.
In step s 8, run up according to default washing procedure index drum.Wherein, default washing procedure herein can be roller washing machine required high speed dewatering operation performed after completing the washing operation to clothing.
In addition, above-mentioned steps S1 is carried out in the process of static unbalance detection cylinder when cylinder low-speed running, if judge in testing process that cylinder static unbalance exceedes prescribed threshold, then as shown in Figure 2, further comprising the steps of S9 after step S1:
In step s 9, if cylinder static unbalance exceedes prescribed threshold, then perform step S5.
It can thus be appreciated that when static unbalance appears in cylinder, also can be performed by index drum and shake loose operation recovery balance, operating process is identical to step S7 with step S5, therefore repeats no more.
Below in conjunction with instantiation, above-mentioned roller washing machine unbalance detection is described further:
Suppose that the rotating speed of cylinder when low-speed running is 90rpm (rev/min), be accelerate to 220rpm from 90rpm in the process of carrying out accelerated service according to constant acceleration.When cylinder is according to 90rpm low-speed running, if cylinder static unbalance does not exceed prescribed threshold, then can detect the torque of cylinder, specifically within the time that cylinder often rotates a circle, the torque of cylinder is detected in real time, and obtain single-revolution torque ripple value according to the maximum of detected torque and minimum of a value, then mean operation is carried out to obtain torque ripple mean value A to multiple (as 5) the single-revolution torque ripple value accessed by the process of drum rotating many weeks (as 5 weeks).Accelerate to the process of 220rpm according to constant acceleration from 90rpm at cylinder, the torque ripple value of Real-time Obtaining cylinder, specifically within the time that cylinder often rotates a circle, the torque of cylinder is detected, and obtain torque ripple value B according to the maximum of detected torque and minimum of a value, then judge whether cylinder occurs dynamic unbalance according to torque ripple mean value A and torque ripple value B, during this deterministic process, torque ripple value B and torque ripple mean value A is carried out asking difference operation to obtain torque ripple difference C (C=B-A), and judge whether torque ripple difference C is greater than default fluctuation threshold X, if, judge that dynamic unbalance appears in cylinder, if not, then judge that dynamic unbalance does not appear in cylinder.When there is dynamic unbalance in cylinder, index drum stops accelerated service, so that there is damaged in collision in the mechanical part alleviated in washing machine, and judge whether the executed number of operations that shakes loose is greater than preset times value Y simultaneously, if, then showing that cylinder cannot restore balance by shaking loose operation, needing index drum at once to shut down, to avoid the mechanical part in washing machine, further gouging abrasion occurring; If not, then index drum execution can shake loose operation to make cylinder restore balance, and continue when cylinder low-speed running to carry out static unbalance detection to cylinder.When dynamic unbalance does not appear in cylinder, carry out running up to continue dehydrating operations to clothes according to 220rpm according to default washing procedure (as high speed dewatering operation) index drum.
In addition, when carrying out static unbalance to cylinder and detecting, if cylinder static unbalance exceedes prescribed threshold, then judge whether the executed number of operations that shakes loose is greater than preset times value Y, if, then showing that cylinder cannot restore balance by shaking loose operation, needing index drum at once to shut down, to avoid the mechanical part in washing machine, further gouging abrasion occurring; If not, then index drum execution can shake loose operation to make cylinder restore balance, and continue when cylinder low-speed running to carry out static unbalance detection to cylinder.
By adopting above-mentioned roller washing machine unbalance detection, dynamic unbalance detection can be carried out when cylinder low-speed running and accelerated service, avoid and carry out dynamic unbalance detection when cylinder runs up and cause mechanical part to occur the problem of impaction lesion.In actual applications, when imbalance detection is carried out to cylinder, following four kinds of situations are usually divided into:
(1) cylinder meets static balancing and dynamic equilibrium simultaneously; As shown in Figure 3, carry out in the process of accelerated service at cylinder according to constant acceleration, torque ripple slightly diminishes relative to torque ripple during low-speed running, so the torque ripple difference obtained in this process can be less than preset fluctuation threshold value, therefore cylinder can continue to accelerate to the stage of running up to perform default washing procedure (as high speed dewatering operation).
(2) only there is dynamic unbalance in cylinder; As shown in Figure 4, carry out in the process of accelerated service at cylinder according to constant acceleration, torque ripple becomes large gradually along with the increase of rotating speed, so the torque ripple difference obtained in this process can be greater than preset fluctuation threshold value, namely there is dynamic unbalance in cylinder, need to stop accelerated service, and execution shakes loose operation to restore balance.
(3) only there is static unbalance in cylinder; As shown in Figure 5, carry out in the process of accelerated service at cylinder according to constant acceleration, torque ripple reduces gradually with the increase of rotating speed, torque ripple obviously diminishes relative to torque ripple during low-speed running, so the torque ripple difference obtained in this process can be less than preset fluctuation threshold value, therefore cylinder can continue to accelerate to the stage of running up to perform default washing procedure (as high speed dewatering operation).
(4) there is static unbalance and dynamic unbalance in cylinder simultaneously, as shown in Figure 6, dynamic unbalance detection could be performed under being in orthostatic situation at cylinder, so Fig. 6 be cylinder perform shake loose operation after meet orthostatic situation under the oscillogram that obtains, carry out in the process of accelerated service at cylinder according to constant acceleration, torque ripple first reduces rear increase with the increase of rotating speed, there is the situation of torque ripple when being greater than low-speed running in the phase to torque ripple after acceleration, so the torque ripple difference obtained in this process can be greater than preset fluctuation threshold value, namely there is dynamic unbalance in cylinder, need to stop accelerated service, and execution shakes loose operation to restore balance.
In sum, roller washing machine is being carried out in the uneven process detected, the embodiment of the present invention cylinder at the uniform velocity to operate according to low speed and static balancing time, the torque of cylinder is detected and obtains torque ripple mean value, then when cylinder carries out accelerated service according to constant acceleration, the torque ripple value of Real-time Obtaining cylinder, and judge whether cylinder occurs dynamic unbalance according to described torque ripple mean value and this torque ripple value, if, then index drum stops accelerated service, and judge whether the executed number of operations that shakes loose of cylinder is greater than preset times value, be, then index drum shuts down, no, then index drum performs and shakes loose operation and carry out low-speed running subsequently, and when cylinder low-speed running, static unbalance detection is carried out to it, detect without the need to adopting sensor to carry out imbalance in the process, reduce cost and detection difficulty, and dynamic unbalance detection can be carried out when cylinder low-speed running and accelerated service, avoid and carry out dynamic unbalance detection when cylinder runs up and cause mechanical part to occur the problem of impaction lesion.
Based on above-mentioned roller washing machine unbalance detection, the embodiment of the present invention additionally provides the uneven checkout gear of roller washing machine, as shown in Figure 7, it comprises static unbalance detection module 100, low speed torque fluctuation acquisition module 200, dynamic unbalance judge module 300, cylinder control module 400 and shakes loose number of times judge module 500.
Static unbalance detection module 100 is for carrying out static unbalance detection to cylinder when cylinder low-speed running.
If low speed torque fluctuation acquisition module 200 does not exceed prescribed threshold for cylinder static unbalance, then the torque of cylinder detected and obtain torque ripple mean value.
Dynamic unbalance judge module 300 is for carrying out in the process of accelerated service at cylinder according to constant acceleration, the torque ripple value of Real-time Obtaining cylinder, and judge whether described cylinder occurs dynamic unbalance according to described torque ripple mean value and described torque ripple value.
When the judged result of dynamic unbalance judge module 300 is for being, cylinder control module 400 stops accelerated service for index drum.
Shake loose number of times judge module 500 for judging whether the executed number of operations that shakes loose of cylinder is greater than preset times value; When judged result is for being, cylinder control module 400 also shuts down for index drum; When judged result is no, cylinder control module 400 also performs to shake loose for index drum and operates and carry out low-speed running, and drives static unbalance detection module 100 to work.
When the judged result of dynamic unbalance judge module 300 is no, cylinder control module 400 is also for running up according to presetting washing procedure index drum.
In addition, if static unbalance detection module 100 detects that cylinder static unbalance exceedes prescribed threshold, then judge whether the executed number of operations that shakes loose of cylinder is greater than preset times value by shaking loose number of times judge module 500; When judged result is for being, cylinder control module 400 index drum shuts down; When judged result is no, cylinder control module 400 index drum performs to shake loose and operates and carry out low-speed running, and drives static unbalance detection module 100 to work.
Further, the torque of low speed torque fluctuation acquisition module 200 pairs of cylinders detects and the process obtaining torque ripple mean value is specially:
Within the time that cylinder often rotates a circle, the torque of cylinder is detected in real time, and obtain single-revolution torque ripple value according to the maximum of detected torque and minimum of a value;
Mean operation is carried out to obtain torque ripple mean value to multiple single-revolution torque ripple values accessed in the process in drum rotating many weeks.
Further, the process of the torque ripple value of dynamic unbalance judge module 300 Real-time Obtaining cylinder is specially:
Within the time that cylinder often rotates a circle, the torque of cylinder is detected, and obtain torque ripple value according to the maximum of detected torque and minimum of a value.
According to above-mentioned torque ripple mean value and this torque ripple value, dynamic unbalance judge module 300 judges whether cylinder occurs that the process of dynamic unbalance is specially:
Torque ripple value and torque ripple mean value are carried out asking difference operation to obtain torque ripple difference;
Judging whether torque ripple difference is greater than and preset fluctuation threshold value, is judge that dynamic unbalance appears in cylinder, no, then judge that dynamic unbalance does not appear in cylinder.
Based on the uneven checkout gear of above-mentioned roller washing machine, the embodiment of the present invention additionally provides a kind of roller washing machine, and it comprises cylinder and the uneven checkout gear of above-mentioned roller washing machine.
Roller washing machine is being carried out in the uneven process detected, fluctuate acquisition module 200 when cylinder at the uniform velocity operates according to low speed by low speed torque, the torque of cylinder is detected and obtains torque ripple mean value, then by dynamic unbalance judge module 300 when cylinder carries out accelerated service according to constant acceleration, the torque ripple value of Real-time Obtaining cylinder, and judge whether cylinder occurs dynamic unbalance according to described torque ripple mean value and this torque ripple value, if, then cylinder control module 400 index drum stops accelerated service, and judge whether the executed number of operations that shakes loose of cylinder is greater than preset times value by shaking loose number of times judge module 500, be, then cylinder control module 400 index drum shuts down, no, then cylinder control module 400 index drum performs to shake loose and operates and carry out low-speed running, and drive static unbalance detection module 100 to work, detect without the need to adopting sensor to carry out imbalance in the process, reduce cost and detection difficulty, and dynamic unbalance detection can be carried out when cylinder low-speed running and accelerated service, avoid and carry out dynamic unbalance detection when cylinder runs up and cause mechanical part to occur the problem of impaction lesion.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. a roller washing machine unbalance detection, is characterized in that, described roller washing machine unbalance detection comprises the following steps:
A. when cylinder low-speed running, static unbalance detection is carried out to cylinder;
If B. described cylinder static unbalance does not exceed prescribed threshold, then the torque of described cylinder detected and obtain torque ripple mean value;
C. carry out in the process of accelerated service at described cylinder according to constant acceleration, the torque ripple value of cylinder described in Real-time Obtaining, and judge whether described cylinder occurs dynamic unbalance according to described torque ripple mean value and described torque ripple value, be, then perform step D, no, then perform step H;
D. control described cylinder and stop accelerated service;
E. judge whether the executed number of operations that shakes loose of described cylinder is greater than preset times value, is, perform step F, no, then perform step G;
F. control described cylinder to shut down;
G. control the execution of described cylinder shake loose operation and carry out low-speed running subsequently, and return execution steps A;
H. control described cylinder according to default washing procedure to remain in operation.
2. roller washing machine unbalance detection as claimed in claim 1, is characterized in that, further comprising the steps of after described steps A:
If J. described cylinder static unbalance exceedes described prescribed threshold, then perform described step e.
3. roller washing machine unbalance detection as claimed in claim 1, is characterized in that, detects and the step obtaining torque ripple mean value specifically comprises the following steps in described step B to the torque of cylinder:
Within the time that described cylinder often rotates a circle, the torque of described cylinder is detected in real time, and obtain single-revolution torque ripple value according to the maximum of detected torque and minimum of a value;
Mean operation is carried out to obtain torque ripple mean value to multiple described single-revolution torque ripple value accessed in the process in described drum rotating many weeks.
4. roller washing machine unbalance detection as claimed in claim 1, it is characterized in that, in described step C, the step of the torque ripple value of cylinder described in Real-time Obtaining is specially:
Within the time that described cylinder often rotates a circle, the torque of described cylinder is detected, and obtain torque ripple value according to the maximum of detected torque and minimum of a value.
5. roller washing machine unbalance detection as claimed in claim 1, is characterized in that, judge whether described cylinder occurs that the step of dynamic unbalance specifically comprises the following steps in described step C according to described torque ripple mean value and described torque ripple value:
Described torque ripple value and described torque ripple mean value are carried out asking difference operation to obtain torque ripple difference;
Judging whether described torque ripple difference is greater than and preset fluctuation threshold value, is judge that dynamic unbalance appears in described cylinder, no, then judge that dynamic unbalance does not appear in described cylinder.
6. the uneven checkout gear of roller washing machine, is characterized in that, the uneven checkout gear of described roller washing machine comprises:
The fluctuation of static unbalance detection module, low speed torque acquisition module, dynamic unbalance judge module, cylinder control module and shake loose number of times judge module;
Described static unbalance detection module is used for carrying out static unbalance detection when cylinder low-speed running to cylinder;
If described low speed torque fluctuation acquisition module is used for described cylinder static unbalance and does not exceed prescribed threshold, then the torque of described cylinder detected and obtain torque ripple mean value;
Described dynamic unbalance judge module is used for carrying out in the process of accelerated service at described cylinder according to constant acceleration, the torque ripple value of cylinder described in Real-time Obtaining, and judge whether described cylinder occurs dynamic unbalance according to described torque ripple mean value and described torque ripple value;
When the judged result of described dynamic unbalance judge module is for being, described cylinder control module stops accelerated service for controlling described cylinder;
The described number of times judge module that shakes loose is for judging whether the executed number of operations that shakes loose of described cylinder is greater than preset times value; When judged result is for being, described cylinder control module also shuts down for controlling described cylinder; When judged result is no, described cylinder control module also shakes loose operation for controlling the execution of described cylinder and carries out low-speed running subsequently, and drives the work of described static unbalance detection module;
When the judged result of described dynamic unbalance judge module is no, described cylinder control module also remains in operation for controlling described cylinder according to default washing procedure.
7. the uneven checkout gear of roller washing machine as claimed in claim 6, it is characterized in that, if described cylinder static unbalance exceedes described prescribed threshold, then judge whether the executed number of operations that shakes loose of cylinder is greater than preset times value by the described number of times judge module that shakes loose; When judged result is for being, described cylinder control module index drum shuts down; When judged result is no, described cylinder control module index drum performs and shakes loose operation and carry out low-speed running subsequently, and drives the work of described static unbalance detection module.
8. the uneven checkout gear of roller washing machine as claimed in claim 6, is characterized in that, the torque of described low speed torque fluctuation acquisition module to described cylinder detects and the process obtaining torque ripple mean value is specially:
Within the time that described cylinder often rotates a circle, the torque of described cylinder is detected in real time, and obtain single-revolution torque ripple value according to the maximum of detected torque and minimum of a value;
Mean operation is carried out to obtain torque ripple mean value to multiple described single-revolution torque ripple value accessed in the process in described drum rotating many weeks.
9. the uneven checkout gear of roller washing machine as claimed in claim 6, it is characterized in that, described in described dynamic unbalance judge module Real-time Obtaining, the process of the torque ripple value of cylinder is specially:
Within the time that described cylinder often rotates a circle, the torque of described cylinder is detected, and obtain torque ripple value according to the maximum of detected torque and minimum of a value.
10. the uneven checkout gear of roller washing machine as claimed in claim 6, it is characterized in that, according to described torque ripple mean value and described torque ripple value, described dynamic unbalance judge module judges whether described cylinder occurs that the process of dynamic unbalance is specially:
Described torque ripple value and described torque ripple mean value are carried out asking difference operation to obtain torque ripple difference;
Judging whether described torque ripple difference is greater than and preset fluctuation threshold value, is judge that dynamic unbalance appears in described cylinder, no, then judge that dynamic unbalance does not appear in described cylinder.
11. 1 kinds of roller washing machines, comprise cylinder, it is characterized in that, described roller washing machine also comprises the uneven checkout gear of roller washing machine as described in any one of claim 6-10.
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| CN104963169A (en) * | 2015-07-31 | 2015-10-07 | 广东威灵电机制造有限公司 | Roller washing machine and unbalance detecting method and device thereof |
| CN105088645A (en) * | 2015-05-28 | 2015-11-25 | 无锡小天鹅股份有限公司 | Control method for rotational washing of front-loader washing machine |
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