CN112481934A - Washing machine eccentricity detection device and detection method thereof - Google Patents
Washing machine eccentricity detection device and detection method thereof Download PDFInfo
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- CN112481934A CN112481934A CN202011312806.6A CN202011312806A CN112481934A CN 112481934 A CN112481934 A CN 112481934A CN 202011312806 A CN202011312806 A CN 202011312806A CN 112481934 A CN112481934 A CN 112481934A
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- 238000005406 washing Methods 0.000 title claims abstract description 108
- 238000001514 detection method Methods 0.000 title claims abstract description 42
- 230000003287 optical effect Effects 0.000 claims abstract description 69
- 238000006073 displacement reaction Methods 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 13
- 230000002159 abnormal effect Effects 0.000 claims description 9
- 230000003068 static effect Effects 0.000 claims description 8
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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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
- D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
- D06F34/14—Arrangements for detecting or measuring specific parameters
- D06F34/16—Imbalance
-
- 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
- D06F33/00—Control of operations performed in washing machines or washer-dryers
- D06F33/30—Control of washing machines characterised by the purpose or target of the control
- D06F33/48—Preventing or reducing imbalance or noise
Abstract
The invention discloses an eccentricity detection device and method for a washing machine, and relates to the technical field of washing machines. The invention comprises a box body, wherein a washing barrel is arranged in the box body, at least one optical distance measuring sensor is arranged on the inner side wall of the box body, and the optical distance measuring sensor is positioned between the box body and the outer side wall of the washing barrel. The displacement detection device of the optical ranging sensor can realize accurate detection of the displacement of the washing barrel and finally achieve the purpose of detecting the eccentric state of the washing barrel, and has the advantages of simple device, convenient operation and strong practicability; in addition, the detection method of the invention is not only suitable for the detection scheme of a single optical ranging sensor, but also can be expanded to the application of any plurality of optical ranging sensors, thereby further increasing the detection accuracy and precision of the optical ranging sensors.
Description
Technical Field
The invention belongs to the technical field of washing machines, and particularly relates to an eccentricity detection device and method for a washing machine.
Background
When a washing barrel of the pulsator washing machine rotates, load in the barrel can drive washing to generate displacement to a certain degree, and the displacement becomes larger when the washing is eccentric; the device is essentially a microswitch, generally placed at the left rear side of the pulsator washing machine and positioned between the washing barrel and the box body, and the safety switch utilizes the characteristic that the washing barrel has large displacement when being eccentric, so that the washing barrel impacts the safety switch when the displacement exceeds a set range, the state of the safety switch is changed from being closed to being disconnected, and at the moment, the eccentric detection of the washing barrel can be realized by utilizing corresponding detection means and algorithms. However, this detection method has two problems: first, the impact of the washing tub and the safety switch may generate noise; secondly, when the washing barrel impacts the box body left and right, the washing barrel does not impact the safety switch, and the washing barrel cannot detect the situation although eccentricity occurs at the moment.
The other method is to adopt a magnetic sensor to realize eccentric detection by matching with a permanent magnet on a washing barrel. The principle is that a permanent magnet and a magnetic sensor are placed at fixed positions, and the permanent magnet is matched with the sensor. The eccentric detection of the barrel can be realized by detecting the distance between the permanent magnet and the magnetic sensor and matching corresponding detection circuits and software. However, when the load in the washing tub is changed, the position of the washing tub may move up and down. Therefore, the positions of the permanent magnet and the magnetic sensor are difficult to accurately calibrate in practical application. Under the condition of more loads, the permanent magnet and the sensor are completely deviated even, so that the software always judges that the washing machine is in an excessively eccentric state and cannot enter a washing or dewatering state.
Disclosure of Invention
The invention aims to provide an eccentric detection device and a detection method of a washing machine, which can realize accurate detection of the displacement of a washing barrel and finally achieve the purpose of detecting the eccentric state of the washing barrel through a displacement detection device of an optical ranging sensor, and have the advantages of simple device, convenient operation and strong practicability; in addition, the detection method of the invention is not only suitable for the detection scheme of a single optical ranging sensor, but also can be expanded to the application of any plurality of optical ranging sensors, thereby further increasing the detection accuracy and precision of the optical ranging sensors.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to an eccentricity detection device of a washing machine, which comprises a box body, wherein a washing barrel is arranged in the box body, at least one optical ranging sensor is arranged on the inner side wall of the box body, and the optical ranging sensor is positioned between the box body and the outer side wall of the washing barrel.
Further, a gap exists between the optical ranging sensor and the outer side wall of the washing barrel, so that the optical ranging sensor and the washing barrel are not in contact in a static state and a running state.
A detection method of an eccentricity detection device of a washing machine comprises the following steps:
the method comprises the following steps: setting a safe displacement D, wherein D is the maximum distance difference allowed between the optical ranging sensor and the outer side wall of the washing barrel in the static state and the operation state;
step two: measuring an initial distance L1 and an average movement distance L2, collecting a maximum distance L3, and calculating the difference between the average movement distance L2 and the initial distance L1, and recording the difference as | L2-L1 |;
wherein, L1 is the initial distance value between the optical distance measuring sensor and the outer side wall of the washing tub when the washing tub is stationary, L2 is the average moving distance value between the optical distance measuring sensor and the outer side wall of the washing tub during t time of operation, and L3 is the maximum distance value between the optical distance measuring sensor and the outer side wall of the washing tub during t time of operation;
step three: judging whether the difference | L2-L1| between the average movement distance L2 and the initial distance L1 is not larger than the safety displacement D or not, if not, judging that the impeller washing machine is eccentric, entering an abnormal processing program, and if so, executing a fourth step;
step four: judging whether the difference | L3-L1| between the maximum distance L3 and the initial distance L1 is not less than D, if not, executing a normal washing program, and if so, executing a step five;
step five: and recording the times N of the difference | L3-L1| between the maximum distance L3 and the initial distance L1, judging whether the counted times N exceed a set value N within the time t, if so, judging that the impeller washing machine is eccentric, entering an abnormal processing program, and if not, returning to the step two. Further, the method is described.
The invention has the following beneficial effects:
1. the invention adopts the displacement detection device of the optical ranging sensor, can realize the accurate detection of the displacement of the washing barrel and finally achieve the purpose of detecting the eccentric state of the washing barrel, and has the advantages of simple device, convenient operation and strong practicability.
2. The detection method is not only suitable for the detection scheme of a single optical ranging sensor, but also can be expanded to the application of any plurality of optical ranging sensors, thereby further increasing the detection accuracy and precision of the optical ranging sensors.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a plan view of an eccentricity detecting apparatus of a washing machine according to the present invention;
FIG. 2 is a flow chart of a method of detecting eccentricity in an eccentricity detection device;
in the drawings, the components represented by the respective reference numerals are listed below:
1-cabinet, 101-optical ranging sensor, 102-washing tub.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "sidewall," "upper," "lower," "inner," and the like are used merely for convenience in describing and simplifying the invention, and do not indicate or imply that the referenced components or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be considered as limiting.
Example one
Referring to fig. 1, the present invention is an eccentricity detection apparatus for a washing machine and a detection method thereof, including a cabinet 1, a washing tub 102 is disposed in the cabinet 1, an optical ranging sensor 101 is disposed on an inner sidewall of the cabinet 1, and the optical ranging sensor 101 is disposed between the cabinet 1 and an outer sidewall of the washing tub 102.
Preferably, the optical distance measuring sensor 101 is located to ensure that the difference between the detected distances of the washing machine in the static state and the operating state is as large as possible, and a gap exists between the optical distance measuring sensor 101 and the outer side wall of the washing tub 102, so that the optical distance measuring sensor 101 and the washing tub 102 are not in contact in the static state and the operating state.
Referring to fig. 2, a method for detecting an eccentricity detection device of a washing machine includes the following steps:
the method comprises the following steps: setting a safety displacement D, wherein D is the maximum distance difference allowed between the optical ranging sensor 101 and the outer side wall of the washing tub 102 in the static state and the running state;
step two: measuring an initial distance L1 and an average movement distance L2, collecting a maximum distance L3, and calculating the difference between the average movement distance L2 and the initial distance L1, and recording the difference as | L2-L1 |;
wherein L1 is the initial distance value between optical distance measuring sensor 101 and the outer sidewall of washing tub 102 at rest, L2 is the average moving distance value between optical distance measuring sensor 101 and the outer sidewall of washing tub 102 during t time of operation, and L3 is the maximum distance value between optical distance measuring sensor 101 and the outer sidewall of washing tub 102 during t time of operation;
step three: judging whether the difference | L2-L1| between the average movement distance L2 and the initial distance L1 is not larger than the safety displacement D or not, if not, judging that the impeller washing machine is eccentric, entering an abnormal processing program, and if so, executing a fourth step;
step four: judging whether the difference | L3-L1| between the maximum distance L3 and the initial distance L1 is not less than D, if not, executing a normal washing program, and if so, executing a step five;
step five: and recording the times N of the difference | L3-L1| between the maximum distance L3 and the initial distance L1, judging whether the counted times N exceed a set value N within the time t, if so, judging that the impeller washing machine is eccentric, entering an abnormal processing program, and if not, returning to the step two.
Example two
Referring to fig. 1, the present invention is an eccentricity detection apparatus for a washing machine, including a box 1, a washing tub 102 disposed in the box 1, two optical distance measuring sensors 101 disposed on the inner sidewall of the box 1, and the two optical distance measuring sensors 101 symmetrically disposed between the box 1 and the outer sidewall of the washing tub 102.
Preferably, the optical distance measuring sensor 101 is located to ensure that the difference between the detected distances of the washing machine in the static state and the operating state is as large as possible, and a gap exists between the optical distance measuring sensor 101 and the outer side wall of the washing tub 102, so that the optical distance measuring sensor 101 and the washing tub 102 are not in contact in the static state and the operating state.
A detection method of an eccentricity detection device of a washing machine comprises the following steps:
the method comprises the following steps: setting safety displacements D1 and D2, where D1 is the maximum distance difference between the first optical distance measuring sensor 101 and the outer sidewall of washing tub 102 allowed at rest and during operation, and D2 is the maximum distance difference between the second optical distance measuring sensor 101 and the outer sidewall of washing tub 102 allowed at rest and during operation, and setting the two safety displacements is equivalent to limiting the movable range of washing tub 101, and the values of safety displacements D1 and D2 are generally not equal due to the different positions of optical distance measuring sensors 101;
step two: measuring initial distances L11 and L12, measuring average moving distances L21 and L22, collecting maximum distances L31 and L32, calculating the difference value between the average moving distance L21 and the initial distance L11, and marking the difference value as | L21-L11|, and the difference value between the average moving distance L22 and the initial distance L12, and marking the difference value as | L22-L12 |;
wherein L11 is the initial distance value between first optical distance measuring sensor 101 and the outer side wall of washing tub 102 at rest, L12 is the initial distance value between second optical distance measuring sensor 101 and the outer side wall of washing tub 102 at rest, L21 is the average moving distance value between first optical distance measuring sensor 101 and the outer side wall of washing tub 102 during t time of operation, L22 is the average moving distance value between second optical distance measuring sensor 101 and the outer side wall of washing tub 102 during t time of operation, L31 is the maximum distance value between first optical distance measuring sensor 101 and the outer side wall of washing tub 102 during t time of operation, and L32 is the maximum distance value between second optical distance measuring sensor 101 and the outer side wall of washing tub 102 during t time of operation;
step three: judging whether the | L21-L11| is not more than the safe displacement D1 and the | L22-L12| is not more than the safe displacement D2, if not, judging that the impeller washing machine is eccentric, entering an abnormal processing program, and if so, executing a fourth step;
step four: judging whether | L31-L11| is not less than D1 and | L32-L12| is not less than D2, if not, executing a normal washing program, and if so, executing a step five;
step five: and recording the times N of | L31-L11| ≧ D1 and | L32-L12| ≧ D2, judging whether the counted times N exceed a set value N within the time t, if so, judging that the pulsator washing machine is eccentric, entering an abnormal processing program, and if not, returning to the step two.
EXAMPLE III
The first embodiment is a detection method of one optical ranging sensor and two optical ranging sensors, and the method can be extended to any application of a plurality of optical ranging sensors, and comprises the following steps:
the method comprises the following steps: setting safety displacements D1, D2, … … and Dn, wherein D1 is the maximum distance difference between the first optical distance measuring sensor 101 and the outer side wall of washing tub 102 allowed at the stationary time and in the operation, D2 is the maximum distance difference between the second optical distance measuring sensor 101 and the outer side wall of washing tub 102 allowed at the stationary time and in the operation, and Dn is the maximum distance difference between the nth optical distance measuring sensor 101 and the outer side wall of washing tub 102 allowed at the stationary time and in the operation, and setting a plurality of safety displacements is equivalent to limiting the movable range of washing tub 101, and the values of safety displacements D1, D2, … … and Dn are generally unequal due to the different positions of optical distance measuring sensors 101;
step two: measuring initial distances L11, L12, … … and L1n, measuring average moving distances L21, L22, … … and L2n, acquiring maximum distances L31, L32, … … and L3n, and calculating the difference between each average moving distance and the initial distance, which is recorded as | L21-L11|, | L22-L12|, … …, | L2n-L1n |;
wherein L11 is the initial distance value between first optical distance measuring sensor 101 and the outer wall of washing tub 102 at rest, L12 is the initial distance value between second optical distance measuring sensor 101 and the outer wall of washing tub 102 at rest, L1n is the initial distance value between nth optical distance measuring sensor 101 and the outer wall of washing tub 102 at rest, L21 is the average moving distance value between first optical distance measuring sensor 101 and the outer wall of washing tub 102 during t time of operation, L22 is the average moving distance value between second optical distance measuring sensor 101 and the outer wall of washing tub 102 during t time of operation, L2n is the average moving distance value between nth optical distance measuring sensor 101 and the outer wall of washing tub 102 during t time of operation, L31 is the maximum distance value between first optical distance measuring sensor 101 and the outer wall of washing tub 102 during t time of operation, and L32 is the maximum distance value between second optical distance measuring sensor 101 and the outer wall of washing tub 102 during t time of operation A distance value L3n is a maximum distance value between the nth optical ranging sensor 101 and the outer sidewall of the washing tub 102 during t time of operation;
step three: judging whether | L21-L11| is less than or equal to D1, and | L22-L12| is less than or equal to D2, … … and | L2n-L1n | are less than or equal to Dn, if not, the impeller washing machine is eccentric, entering an abnormal processing program, and if so, executing a step four;
step four: judging | L31-L11| ≧ D1 and | L32-L12| ≧ D2, … … and | L3n-L1n | ≧ Dn, if judging no, executing a normal washing program, and if judging yes, executing a step five;
step five: recording times N of | L31-L11| ≧ D1 and | L32-L12| ≧ D2, … …, | L3N-L1N | ≧ Dn, judging whether the counted times N exceed a set value N within t time, if so, judging that the pulsator washing machine has eccentricity, entering an abnormality processing program, and if not, returning to the step two.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (3)
1. The utility model provides an eccentric detection device of washing machine, includes box (1), be provided with washing tub (102) in box (1), its characterized in that: at least one optical ranging sensor (101) is arranged on the inner side wall of the box body (1), and the optical ranging sensor (101) is located between the box body (1) and the outer side wall of the washing tub (102).
2. An eccentric detection device of washing machine, its characterized in that: a gap exists between the optical ranging sensor (101) and the outer side wall of the washing barrel (102), so that the optical ranging sensor (101) and the washing barrel (102) are not in contact in a static state and a running state.
3. A method for detecting an eccentricity detecting device of a washing machine according to any one of claims 1 to 2, comprising the steps of:
the method comprises the following steps: setting a safety displacement D, wherein D is the maximum distance difference allowed between the optical ranging sensor (101) and the outer side wall of the washing barrel (102) when the washing barrel is at rest and in operation;
step two: measuring an initial distance L1 and an average movement distance L2, collecting a maximum distance L3, and calculating the difference between the average movement distance L2 and the initial distance L1, and recording the difference as | L2-L1 |;
wherein L1 is the initial distance value between the optical distance measuring sensor (101) and the outer side wall of the washing tub (102) at rest, L2 is the average moving distance value between the optical distance measuring sensor (101) and the outer side wall of the washing tub (102) in t time of operation, and L3 is the maximum distance value between the optical distance measuring sensor (101) and the outer side wall of the washing tub (102) in t time of operation;
step three: judging whether the difference | L2-L1| between the average movement distance L2 and the initial distance L1 is not larger than the safety displacement D or not, if not, judging that the impeller washing machine is eccentric, entering an abnormal processing program, and if so, executing a fourth step;
step four: judging whether the difference | L3-L1| between the maximum distance L3 and the initial distance L1 is not less than D, if not, executing a normal washing program, and if so, executing a step five;
step five: and recording the times N of the difference | L3-L1| between the maximum distance L3 and the initial distance L1, judging whether the counted times N exceed a set value N within the time t, if so, judging that the impeller washing machine is eccentric, entering an abnormal processing program, and if not, returning to the step two.
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Application publication date: 20210312 |