CN104593995A - Washing machine cylinder collision detecting control device and method - Google Patents
Washing machine cylinder collision detecting control device and method Download PDFInfo
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- CN104593995A CN104593995A CN201310533156.1A CN201310533156A CN104593995A CN 104593995 A CN104593995 A CN 104593995A CN 201310533156 A CN201310533156 A CN 201310533156A CN 104593995 A CN104593995 A CN 104593995A
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- washing machine
- controller
- acceleration
- bucket
- hits
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- D06F37/203—
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/42—Safety arrangements, e.g. for stopping rotation of the receptacle upon opening of the casing door
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- D06F2202/12—
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- D06F2204/06—
Abstract
The invention discloses a washing machine cylinder collision detecting control device and method. The detecting device comprises an acceleration sensor and a rotation speed sensor, wherein the acceleration sensor is arranged in a washing machine box body and used for detecting the radial acceleration acc of an inner cylinder during rotating, the rotation speed sensor is used for detecting the rotation speed rpm of the inner cylinder, and the acceleration sensor and the rotation speed sensor are connected with a controller. The controller obtains the eccentric value Dt of rotation of the inner cylinder according to the formula shown in the specification, wherein M is a preset proportional constant, and when Dt exceeds the preset value D0, the controller judges that cylinder collision occurs. The detecting device will detect and work out the offset of the inner cylinder through the controller as long as the inner cylinder rotates in a deviation mode, whether cylinder collision occurs or not is judged by comparing the offset of the inner cylinder with the set maximum allowed offset, the situation that the cylinder deviates and collides but deviation and collision are not detected does not exist, and precision is high.
Description
Technical field
The present invention relates to washing machine field, particularly relate to a kind of washing machine and hit barrel detection control apparatus and method.
Background technology
When laundry machine dehydration or rinsing, because of load skewness within the inner barrel, cause the centre-of gravity shift of interior bucket, during dehydration, interior bucket rotates unstable, left-right and front-back and can produce skew up and down, causes outer barrel and casing of washing machine to collide if side-play amount crosses conference, namely hits bucket.When to hit barrel, clothes dewatering can be caused normally to carry out, lose time and the energy.Therefore, need the generation of hitting bucket to be detected in time, to take countermeasure.
A barrel method is hit in existing detection: coil on washing machine on one of them angle of seat and add safety switch, when interior bucket rotation causes outer barrel to produce skew, can touch safety switch, the stressed action of safety switch, connect loop, thus judge that bucket hits casing and occurs, report to the police.
Above-mentioned prior art, although detection method is simple, can effectively detect the generation of hitting bucket.But judge that when hitting bucket occurs, depend on the sensitivity of switch and the position set by it.The method only has entire body offset collisions outside just can judge to during safety switch, if outer barrel skew is touched and just can not be judged less than safety switch, even there will be and hits bucket and the phenomenon of touching less than safety switch.
For above problem, need badly and want a kind of new washing machine to hit barrel detection control apparatus and method, detection control effect more better than prior art is provided.
Summary of the invention
A kind of washing machine is the object of the present invention is to provide to hit a barrel detection control apparatus, its checkout gear can detect acceleration signal when interior bucket rotates and rotating speed, and calculates the offset distance of interior bucket, by the maximum allowable offset of contrast setting, judge whether bucket can be hit, accuracy is high.
Another object of the present invention there are provided a kind of washing machine and hits a barrel detection control method, and its detection method is applied in above device, can detect whether hit bucket better.
For reaching this object, the present invention by the following technical solutions:
A kind of washing machine hits a barrel detection control apparatus, its checkout gear comprises the acceleration transducer in order to detect radial acceleration acc when washing machine inner tub rotates be arranged in casing of washing machine, also comprise the speed probe detecting interior bucket rotating speed rpm, described acceleration transducer is all connected with controller with speed probe, described controller obtains the eccentricity value Dt of interior bucket rotation according to following formula, Dt=acc*M/rpm^2, wherein M is default proportionality constant, when Dt exceedes preset value D0, controller judges to hit bucket.
As preferably, described acceleration transducer for detecting X-axis in positive coordinate system, Y-axis, radial acceleration when the interior bucket in any one direction in Z axis three directions, arbitrarily both direction or three directions rotates.
As preferably, the value of described proportionality constant M is obtained by following formulae discovery, and M=(3600*g)/(S*4* π ^2), wherein g is acceleration of gravity, and S is the sensitivity of acceleration transducer.
As preferably, its control device comprises the motor and warning device that are connected with described controller, and motor rotates for driving interior bucket, when controller judges to hit barrel, control warning device and send alarm signal, and control motor reduction rotating speed, until Dt is less than or equal to described preset value D0.
As preferably, described acceleration transducer is arranged on suspension rod, interior bucket or motor.
A kind of washing machine hits a barrel detection control method, and testing process comprises step:
S10, acceleration transducer detect the radial acceleration acc in certain direction when washing machine inner tub rotates, and this radial acceleration acc is passed to controller;
The rotating speed rpm of bucket in S20, speed probe detect, and the rotating speed rpm of interior bucket is passed to controller;
The eccentricity value Dt that S30, described controller rotate according to bucket in following formulae discovery, Dt=acc*M/rpm^2, wherein M is default proportionality constant, and when Dt exceedes preset value D0, controller judges to hit bucket.
As preferably, in step slo,
Acceleration transducer detects X-axis in positive coordinate system, Y-axis, radial acceleration when the interior bucket in any one direction in Z axis three directions, arbitrarily both direction or three directions rotates.
As preferably, in step s 30,
Obtained the value of proportionality constant M by following formulae discovery, M=(3600*g)/(S*4* π ^2), wherein g is acceleration of gravity, and S is the sensitivity of acceleration transducer.
As preferably, control procedure comprises the following steps:
S40, when controller judges to hit barrel, controller controls warning device and sends alarm signal, and controls motor and reduce rotating speed, until Dt is less than or equal to described preset value D0.
Beneficial effect of the present invention is: the invention provides a kind of washing machine and hit barrel detection control apparatus and method; by acceleration transducer sense acceleration signal; bucket rotating speed rpm in being detected by speed probe; the side-play amount of interior bucket is calculated by controller; the maximum allowable offset of contrast setting; judge that interior bucket drives outer barrel whether can bump against casing, thus play the object of protection.Offset as long as interior bucket rotates, acceleration transducer will detect acceleration signal, carries out computing, and there is not staving and skew occurs and situation about can't detect, accuracy is high.
Accompanying drawing explanation
Fig. 1 is the hardware composition structural representation of the tub-impact detector that the specific embodiment of the invention provides;
Fig. 2 is the hardware composition structural representation hitting barrel detection control apparatus that the specific embodiment of the invention provides;
Fig. 3 is the structural representation of the washing machine that the specific embodiment of the invention provides;
Fig. 4 is the flow chart hitting barrel detection method that the specific embodiment of the invention provides;
Fig. 5 be the specific embodiment of the invention provide hit a barrel flow chart for detection control method.
Wherein:
1: acceleration transducer; 2: speed probe; 3: controller; 4: motor; 5: interior bucket; 6: casing; 7: warning device.
Detailed description of the invention
Technical scheme of the present invention is further illustrated by detailed description of the invention below in conjunction with accompanying drawing.
Fig. 1 is the hardware composition structural representation of the tub-impact detector that the specific embodiment of the invention provides.As shown in Figure 1, its checkout gear comprises the acceleration transducer 1 be arranged in casing of washing machine 6, and in order to detect radial acceleration acc when interior bucket 5 rotates, the unit of acc is meter per second
2also comprise the speed probe 2 detecting interior bucket 5 rotating speed rpm, the unit of rpm is rev/min, described acceleration transducer 1 is all connected with controller 3 with speed probe 2, and described controller 3 obtains the eccentricity value Dt of interior bucket 5 rotation according to following formula, Dt=acc*M/rpm^2, the unit of Dt is rice, wherein M is default proportionality constant, and when Dt exceedes preset value D0, controller 3 judges to hit bucket.
Due in washing machine structure, interior bucket is interior, and outer barrel outside, inner barrel and outer barrel composition staving, fix, and outer barrel lays particular stress on rear skew along with interior bucket and offsets, and inner barrel and outer barrel displacement can be regarded as equally by the relative position between inner barrel and outer barrel.So controller 3 obtain according to formula in the eccentricity value Dt that rotates of bucket 5 also can regard the eccentricity value of outer barrel as.When Dt exceedes preset value D0, that is to say that the eccentricity value of outer barrel exceedes preset value, then controller 3 judges to hit bucket.
Wherein, the value of proportionality constant M is determined according to the type of used acceleration transducer 1, model and acceleration of gravity etc.Use acceleration transducer that is dissimilar and model, the value of described proportionality constant M is all different.
Concrete, this device, by acceleration transducer sense acceleration signal, detects interior bucket rotating speed rpm by speed probe; the side-play amount of interior bucket is calculated by controller; the maximum allowable offset of contrast setting, judges whether outer barrel can bump against casing, thus plays the object of protection.
In the present embodiment, the acceleration transducer used is preferably with the new accelerometer of U.S., i.e. MXC6202XMP.Following MXC6202XMP is example, describes computational process in detail.
Derive as follows:
Actual acceleration a=(acc/S) * g, wherein, S is the sensitivity of U.S. new accelerometer (MXC6202XMP), and its value size is 512; G=9.8 is acceleration of gravity.So, actual acceleration a=(acc/512) * g.
w=2*π*f=2*π*(rpm/60)
In supposing, the side-play amount of bucket is Dt, then have,
Dt=a/w^2=acc*g/S(2*π*(rpm/60))^2=(acc/rpm^2)*((3600*g)/(S*4*π^2))=M*(acc/rpm^2)，
Wherein, M is as proportionality constant, and M=(3600*g)/(S*4* π ^2), wherein g is acceleration of gravity, and S is the sensitivity of acceleration transducer.
In the present embodiment, the value size due to the sensitivity S of MXC6202XMP is 512, so,
Dt=1.75*(acc/rpm^2)，
So in theory acc/rpm^2 be multiplied by 1.75 obtain be exactly in the side-play amount Dt(unit of bucket: rice).The side-play amount Dt of interior bucket also equals the side-play amount of outer barrel.
When normal dehydration or rinsing, the distance between outer barrel and casing within the specific limits.After interior bucket rotates generation skew, the distance between outer barrel and casing is by situation near time far away when occurring, after the distance between outer barrel and casing exceedes preset value, interior bucket rotarily drives whole staving and hits casing.Therefore can set the maximum allowable offset that interior bucket rotates, when side-play amount is less than maximum allowable offset, then judge to work well.Otherwise, then judge to occur extremely, namely hitting the phenomenon of staving.
Setting:
Time static, the beeline D=0.020m of staving and casing.
The side-play amount being set maximum permission staving by actual experiment is 0.016m, i.e. preset value D0=0.016m.
At a time t,
If side-play amount Dt≤D0, then judge that the displacement of staving can accept, continue to run;
If side-play amount Dt > is D0, then judges that the displacement of staving is unacceptable, can tub-impact phenomenon be caused.
Such as:
If the acc value that the t1 moment detects is 57.15, rpm value is 100, and the value that can calculate side-play amount Dt is acc/rpm^2*1.75=57.14/(100*100)=0.01m, because Dt<D0, so be judged as that side-play amount can accept, continue to run.
If the acc value that the t2 moment detects is 102.86, rpm value is 100,
The value calculating side-play amount Dt is acc/rpm^2*1.75=102.86/(100*100)=0.018m.
Because Dt>D0, so be judged as that side-play amount is unacceptable, then this device is taken measures, and avoids staving to hit casing phenomenon and occurs.
In the present embodiment, described acceleration transducer is not limited to selects MXC6202XMP, also can be other device, as long as can realize sense acceleration value.
In the present embodiment, this device can detect the displacement in X-axis, Y-axis, any one direction in Z axis three directions, arbitrarily both direction or three directions, can by the displacement in any one direction of setting, arbitrarily both direction or three directions as criterion.That is, described acceleration transducer 1 is for detecting radial acceleration when bucket rotates in X-axis in positive coordinate system, Y-axis, any one direction in Z axis three directions, arbitrarily both direction or three directions.
Concrete, suppose that X-direction is left and right directions, Y-direction is fore-and-aft direction, and Z-direction is above-below direction.Bucket is when space vibration, and there is skew in this three directions, calculate according to radial acceleration, and when the side-play amount Dt in any both direction of interior bucket in three directions or three directions is unacceptable, then this device is taken measures, and avoids tub-impact phenomenon to occur.
Fig. 2 is the hardware composition structural representation hitting barrel detection control apparatus that the specific embodiment of the invention provides; Fig. 3 is the structural representation of the washing machine that the specific embodiment of the invention provides.As shown in Figure 2, this kind of washing machine hits barrel detection control apparatus and not only comprises above-described washing machine tub-impact detector, also comprise control device, described control device comprises the motor 4 and warning device 7 that are connected with controller 3, and motor 4 rotates for driving interior bucket 5, when controller 3 judges to hit barrel, control warning device 7 and send alarm signal, and control motor 5 and reduce rotating speed, until Dt is less than or equal to described preset value D0, thus avoid tub-impact phenomenon to occur.
In the present embodiment, final purpose detects washing machine bias to avoid tub-impact phenomenon, and the acceleration signal data detected for acceleration transducer according to actual conversion and the process of carrying out distinct methods, finally can calculate the side-play amount Dt of interior bucket 5.
In the present embodiment, preferably, described acceleration transducer 1 can be arranged on washing machine suspension rod, also can be arranged on washing machine inner tub 5, or also can be arranged on motor for washer 4 and any position that can realize acceleration detection function.
Fig. 4 is the flow chart hitting barrel detection method that the specific embodiment of the invention provides.As shown in Figure 4, testing process comprises step:
S10, acceleration transducer detect the radial acceleration acc in certain direction when washing machine inner tub rotates, and this radial acceleration acc is passed to controller.Wherein the unit of acc is meter per second
2.
In S20, speed probe detect, the unit of the rotating speed rpm of bucket, rpm is rev/min, and the rotating speed rpm of interior bucket is passed to controller.
The eccentricity value Dt that S30, described controller rotate according to bucket in following formulae discovery, the unit of Dt=acc*M/rpm^2, Dt is rice, and wherein M is default proportionality constant, and when Dt exceedes preset value D0, controller judges to hit bucket.
In the present embodiment, preferably, in step slo,
Acceleration transducer detects X-axis in positive coordinate system, Y-axis, radial acceleration when the interior bucket in any one direction in Z axis three directions, arbitrarily both direction or three directions rotates.
In the present embodiment, preferably, in step s 30,
Obtained the value of proportionality constant M by following formulae discovery, M=(3600*g)/(S*4* π ^2), wherein g is acceleration of gravity, and S is the sensitivity of acceleration transducer.
Fig. 5 be the specific embodiment of the invention provide hit a barrel flow chart for detection control method.As shown in Figure 5, this kind hits a barrel detection control method and comprises the following steps:
S10, acceleration transducer detect the radial acceleration acc in certain direction when washing machine inner tub rotates, and this radial acceleration acc is passed to controller.Wherein the unit of acc is meter per second
2.
In S20, speed probe detect, the unit of the rotating speed rpm of bucket, rpm is rev/min, and the rotating speed rpm of interior bucket is passed to controller.
The eccentricity value Dt that S30, described controller rotate according to bucket in following formulae discovery, the unit of Dt=acc*M/rpm^2, Dt is rice, and wherein M is default proportionality constant.
Whether the eccentricity value Dt that in S40, controller judge, bucket rotates is greater than preset value D0, and when the eccentricity value Dt that interior bucket rotates is greater than preset value D0, then controller judges to hit bucket, performs step S50; Otherwise, return and perform step S10.
S50, controller control warning device and send alarm signal, and control motor reduction rotating speed, until Dt is less than or equal to described preset value D0.
Above step S50 is control procedure.First use detection method to detect, when controller judges to hit barrel, then perform control procedure, i.e. step S50.
Below know-why of the present invention is described in conjunction with specific embodiments.These describe just in order to explain principle of the present invention, and can not be interpreted as limiting the scope of the invention by any way.Based on explanation herein, those skilled in the art does not need to pay performing creative labour can associate other detailed description of the invention of the present invention, and these modes all will fall within protection scope of the present invention.
Claims (9)
1. a washing machine hits a barrel detection control apparatus, it is characterized in that: its checkout gear comprises the acceleration transducer (1) in order to detect radial acceleration acc when interior bucket (5) rotates be arranged in casing of washing machine (6), also comprise the speed probe (2) detecting interior bucket (5) rotating speed rpm, described acceleration transducer (1) is all connected with controller (3) with speed probe (2), described controller (3) obtains the eccentricity value Dt of interior bucket rotation according to following formula, Dt=acc*M/rpm^2, wherein M is default proportionality constant, when Dt exceedes preset value D0, controller judges to hit bucket.
2. washing machine according to claim 1 hits a barrel detection control apparatus, it is characterized in that, described acceleration transducer (1) for detecting X-axis in positive coordinate system, Y-axis, radial acceleration when the interior bucket in any one direction in Z axis three directions, arbitrarily both direction or three directions rotates.
3. washing machine according to claim 1 hits a barrel detection control apparatus, it is characterized in that, the value of described proportionality constant M is obtained by following formulae discovery, M=(3600*g)/(S*4* π ^2), wherein g is acceleration of gravity, and S is the sensitivity of acceleration transducer.
4. washing machine according to claim 1 hits a barrel detection control apparatus, it is characterized in that: its control device comprises the motor (4) and warning device (7) that are connected with described controller (3), motor (4) rotates for driving interior bucket, when controller (3) judges to hit barrel, control warning device (7) and send alarm signal, and control motor (4) reduction rotating speed, until Dt is less than or equal to described preset value D0.
5. washing machine according to claim 1 hits a barrel detection control apparatus, it is characterized in that, described acceleration transducer (1) is arranged on suspension rod, interior bucket or motor.
6. washing machine hits a barrel detection control method, and it is characterized in that, testing process comprises step:
S10, acceleration transducer detect the radial acceleration acc in certain direction when washing machine inner tub rotates, and this radial acceleration acc is passed to controller;
The rotating speed rpm of bucket in S20, speed probe detect, and the rotating speed rpm of interior bucket is passed to controller;
The eccentricity value Dt that S30, described controller rotate according to bucket in following formulae discovery, Dt=acc*M/rpm^2, wherein M is default proportionality constant, and when Dt exceedes preset value D0, controller judges to hit bucket.
7. washing machine according to claim 6 hits a barrel detection control method, it is characterized in that, in step slo,
Acceleration transducer detects X-axis in positive coordinate system, Y-axis, radial acceleration when the interior bucket in any one direction in Z axis three directions, arbitrarily both direction or three directions rotates.
8. washing machine according to claim 6 hits a barrel detection control method, it is characterized in that, in step s 30,
Obtained the value of proportionality constant M by following formulae discovery, M=(3600*g)/(S*4* π ^2), wherein g is acceleration of gravity, and S is the sensitivity of acceleration transducer.
9. washing machine according to claim 6 hits a barrel detection control method, and it is characterized in that, control procedure comprises the following steps:
When controller judges to hit barrel, controller controls warning device and sends alarm signal, and controls motor and reduce rotating speed, until Dt is less than or equal to described preset value D0.
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| CN105603689A (en) * | 2016-02-26 | 2016-05-25 | 青岛海尔科技有限公司 | Eccentricity detection method and device of pulsator washing machine, suspender system and pulsator washing machine |
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| CN108570796A (en) * | 2017-03-09 | 2018-09-25 | 惠州市蓝微电子有限公司 | A kind of washing machine and unbalance detection of uneven detection |
| CN108457048A (en) * | 2018-01-31 | 2018-08-28 | 惠而浦（中国）股份有限公司 | A kind of detection roller washing machine hangs the system and method for spring-drop |
| CN110924064A (en) * | 2018-08-30 | 2020-03-27 | 青岛海尔智能技术研发有限公司 | Washing data detection method and device and washing machine |
| US10975512B2 (en) | 2018-10-05 | 2021-04-13 | Haier Us Appliance Solutions, Inc. | Washing machine appliance and methods for preventing spin out-of-balance conditions |
| CN110592878A (en) * | 2019-09-11 | 2019-12-20 | 珠海格力电器股份有限公司 | Drum collision preventing method and device for drum washing machine and drum washing machine |
| CN113026296A (en) * | 2019-12-09 | 2021-06-25 | 青岛海尔洗衣机有限公司 | Washing machine control method and washing machine |
| CN111101327A (en) * | 2019-12-31 | 2020-05-05 | 合肥美的洗衣机有限公司 | Method and device for detecting tub collision of clothes treatment device and clothes treatment device |
| CN111101327B (en) * | 2019-12-31 | 2023-04-21 | 合肥美的洗衣机有限公司 | Drum collision detection method and device for clothes treatment device and clothes treatment device |
| CN113355849A (en) * | 2020-03-04 | 2021-09-07 | 青岛海尔洗衣机有限公司 | Washing machine control method and device |
| CN111286918A (en) * | 2020-03-24 | 2020-06-16 | 青岛海尔洗衣机有限公司 | Dewatering control method of washing machine and washing machine |
| CN111286918B (en) * | 2020-03-24 | 2022-12-09 | 青岛海尔洗衣机有限公司 | Dewatering control method of washing machine and washing machine |
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