CN115772774A - Clothes processing device and control method thereof - Google Patents
Clothes processing device and control method thereof Download PDFInfo
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- CN115772774A CN115772774A CN202111054869.0A CN202111054869A CN115772774A CN 115772774 A CN115772774 A CN 115772774A CN 202111054869 A CN202111054869 A CN 202111054869A CN 115772774 A CN115772774 A CN 115772774A
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- 238000000034 method Methods 0.000 title claims abstract description 42
- 239000002184 metal Substances 0.000 claims abstract description 205
- 229910052751 metal Inorganic materials 0.000 claims abstract description 205
- 238000001514 detection method Methods 0.000 claims abstract description 145
- 230000006698 induction Effects 0.000 claims abstract description 20
- 230000001960 triggered effect Effects 0.000 claims description 13
- 230000001133 acceleration Effects 0.000 claims description 7
- 238000005070 sampling Methods 0.000 claims description 6
- 230000008859 change Effects 0.000 abstract description 8
- 238000005406 washing Methods 0.000 description 14
- 238000010586 diagram Methods 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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- 238000001035 drying Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 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
- 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
- D06F33/47—Responding to irregular working conditions, e.g. malfunctioning of pumps
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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
- D06F34/18—Condition of the laundry, e.g. nature or weight
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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
- D06F34/20—Parameters relating to constructional components, e.g. door sensors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
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Abstract
The invention discloses a clothes treatment device and a control method thereof.A clothes feeding opening of the clothes treatment device is respectively provided with a metal detection module and an infrared induction module; the control method comprises the following steps: and when judging that the metal detection module and the infrared sensing module generate trigger signals, a control system of the clothes processing device gives an alarm, otherwise, the control system does not give an alarm. By adopting the method, the clothes processing device provided by the invention can give an alarm only when the triggering signal generated by the metal detection module caused by the metal foreign matter in the passing clothes is judged, so that the interference of the change of the magnetic field in the clothes processing device caused by the shaking of the inner cylinder or the knocking of the shell of the clothes processing device on the metal detection can be effectively shielded, the identification accuracy of the metal detection module is improved, the phenomenon of false triggering of the alarm is reduced, and the use experience of a user is improved.
Description
Technical Field
The invention belongs to the technical field of clothes treatment, and particularly relates to a clothes treatment device and a control method thereof.
Background
With the increasing living standard of people, the washing machine has become one of the necessary household appliances in the family, and most people use the washing machine as a main tool for washing clothes. Because people's life rhythm is relatively fast, often forget to check the clothes pocket during the laundry, and the clothes pocket often contains metal foreign matters such as coin, key, metal ornaments, cell-phone, earphone.
Because in the washing process, the clothing is constantly stirred repeatedly, these metal foreign matters fall out from the pocket of clothing very probably, direct and washing machine's inner tube contact, can make washing machine's inner tube, the clothing receives wearing and tearing, and coin, key, the little foreign matters of metal ornaments isovolumn are blocked in the gap of inner tube easily, may cause the inner tube card to die, motor overload scheduling problem, cause serious damage or even damage to washing machine, and also can't continue to use after cell-phone, earphone etc. electronic product soaks, also can cause user's property loss.
Patent No. 201721626521.3 discloses a washing machine with metal detection function, a dehydration barrel is installed in the center of a machine body, and a detection coil is fixedly installed on the outer side of the dehydration barrel. When a metal object enters the detection coil, the signal values at the two ends of the coil change, and the changed signal is processed by the metal detector circuit board, so that the alarm gives out an alarm sound, and the indicator lamp lights to prompt the metal object.
Although the washing machine disclosed in the above application can detect whether metal exists in the clothes put in, due to the strong magnetic field environment of the washing machine, the dewatering drum, the casing, the electromagnetic valve, the display panel and other metal electric devices of the washing machine can interfere with the detection coil. For example, the user can make the dewatering barrel appear rocking throwing heavier clothing, perhaps user indoor construction etc. and shaking of dewatering barrel will cause the detection coil of dewatering barrel outside installation to produce magnetic field change, and the easy false triggering alarm is reported to the police, seriously influences the rate of accuracy of detection coil discernment, reduces user's use and experiences.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art, and provide a control method of a clothes treatment device, which can effectively shield the interference of the change of the magnetic field inside the clothes treatment device, such as the shaking of an inner drum and the knocking of a shell, on the metal detection by assisting the detection of a metal detection module through an infrared sensing module additionally arranged at a clothes putting port, and reduce the phenomenon of false triggering alarm.
In order to solve the technical problem, a first aspect of the present application discloses a control method for a clothes treatment device, where a clothes inlet of the clothes treatment device is provided with a metal detection module and an infrared sensing module, respectively, and the control method includes:
and when judging that the metal detection module and the infrared sensing module both generate trigger signals, a control system of the clothes treatment device gives an alarm, otherwise, the control system does not give an alarm.
Further, the control system gives an alarm when judging that the metal detection module and the infrared sensing module simultaneously generate the trigger signals or when judging that the trigger signals are generated successively within a set time difference range, or does not give an alarm.
Further, in the working process of the clothes processing device, if the metal detection module is judged to generate the metal trigger signal, whether the infrared induction module also generates the infrared trigger signal within a set time difference range is further judged, and if yes, an alarm is given; if not, no alarm is given.
Preferably, if the time difference range is set to be T0 seconds, within the first T0 seconds or the last T0 seconds of the trigger signal generated by the metal detection module,
if the infrared sensing module is judged to be in a triggering state, the fact that the metal detection module is triggered by metal foreign matters in the thrown clothes can be inferred, and then an alarm is given, otherwise, the alarm is not given.
Further, the method also comprises the following steps:
acquiring an instantaneous slope value of a metal sensing signal output by a metal detection module in real time, and comparing the instantaneous slope value with a set slope threshold value;
when the instantaneous slope value of the metal induction signal is judged to be larger than the set slope threshold value, judging whether the infrared induction signal is in a trigger state at the moment;
if yes, alarming; if not, no alarm is given.
Further, when it is determined that the metal sensing signal output by the metal detection module exceeds a set dynamic average threshold, the step of obtaining the instantaneous slope value of the output metal sensing signal in real time is started.
Further, the obtaining of the instantaneous slope value of the metal sensing signal output by the metal detection module specifically includes the following steps:
collecting output voltage signals V1, V2, vn of a metal detection module;
drawing a detection waveform curve changing along with time t based on the acquired output voltage signal;
when the output voltage signal is judged to be lower than the set dynamic average threshold value, the instantaneous slope value P = delta V/delta t of the output voltage signal is started to be calculated;
preferably, the output voltage signal has a sampling frequency of T1, Δ V = V n-2 -V n Δ T =2T1, instantaneous slope value P = (V) n-2 -V n )/2T1；
Preferably, said instantaneous slope value P is taken directly as Δ V, i.e. V n-2 -V n A difference of (d);
preferably, the sampling frequency of the output voltage signal is one point every 10 to 20ms, namely 20ms is more than or equal to T1 and more than or equal to 10ms.
Further, the laundry treating apparatus further includes a vibration detecting device for detecting vibration of the inner tub, the control method including:
when the metal detection module and the infrared induction module are judged to generate trigger signals,
further judging whether the vibration detection device generates a trigger signal at the moment, if so, not giving an alarm; if not, alarming;
preferably, the vibration detecting means is an acceleration sensor provided on the inner tub.
Further, the clothes treatment device also comprises a voice alarm unit, and the control system controls the voice alarm unit to send out a voice alarm prompt or not according to the judgment result;
preferably, the laundry treating apparatus further includes a light display unit including at least a warning lamp and an interference lamp.
In a second aspect of the present application, a laundry treatment apparatus and a control method using the laundry treatment apparatus are also provided.
Further, the clothes treatment device also comprises a tray seat, and the clothes input opening is arranged in the tray seat;
the metal detection module and the infrared sensing module are arranged at the same height position in the disc seat.
Furthermore, an annular mounting groove for mounting the metal detection module is formed in the disc seat;
the infrared induction module comprises an infrared emission module and an infrared receiving module which are symmetrically arranged in the annular mounting groove along the radial direction of the clothes throwing port.
After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects.
1. According to the control method of the clothes treatment device, the infrared sensing module is additionally arranged at the clothes throwing opening to assist the metal detection module in detecting, when the metal detection module generates a trigger signal, whether clothes pass through the metal detection module is judged through the infrared sensing module, only when the metal detection module and the infrared sensing module generate trigger signals and judge that the trigger signals generated by the metal detection module are caused by metal foreign matters in the passing clothes, an alarm can be given, the interference of the change of the magnetic field inside the clothes treatment device, such as the shaking of an inner drum or the knocking of the shell of the clothes treatment device, on the metal detection can be effectively shielded, the identification accuracy of the metal detection module is improved, the phenomenon of false triggering of the alarm is reduced, and the use experience of a user is improved.
2. The clothes processing device provided by the invention also comprises a vibration detection device for detecting the vibration of the inner barrel, when the metal detection module and the infrared sensing module both generate trigger signals, whether the vibration detection device generates the trigger signals or not is further judged, and if the vibration detection device is also in a trigger state, no alarm is given. The method mainly aims at the phenomenon that a user throws a plurality of pieces of clothes continuously, the clothes thrown in front hit the bottom of the inner barrel to trigger the metal detection module to generate a sensing signal, but the clothes behind just pass through the throwing opening, the infrared sensing module is still at a high level and is also in a triggered state, and therefore false alarm is caused, interference of extreme phenomena on metal detection results can be effectively shielded, and the accuracy of metal detection module identification is further improved.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention to the proper form disclosed herein. It is obvious that the drawings in the following description are only some embodiments and that for a person skilled in the art, other drawings can also be derived from them without inventive effort. In the drawings:
FIG. 1 is a schematic diagram of a waveform curve of a metal signal, an infrared signal and an instantaneous slope value changing with time when metal foreign matters exist in clothes put in the embodiment of the invention;
FIG. 2 is a flowchart of a first embodiment of a control method of a laundry treating apparatus according to an embodiment of the present invention;
FIG. 3 is a graph comparing various types of disturbances with metal induced signals and infrared signals of metal foreign matter in clothes according to an embodiment of the present invention;
FIG. 4 is a graph of instantaneous slope values versus output voltage for the metal detection module of FIG. 3;
FIG. 5 is a schematic diagram illustrating changes of a metal sensing signal and an infrared signal when the inner tub shakes according to an embodiment of the present invention;
FIG. 6 is a schematic diagram illustrating a variation of an instantaneous slope value of an output voltage of the metal detection module corresponding to FIG. 3;
FIG. 7 is a flowchart illustrating a second embodiment of a method for controlling a laundry treating apparatus according to an embodiment of the present invention;
FIG. 8 is a flowchart of a control method of a laundry treating apparatus according to a third embodiment of the present invention (judgment of vibration of an inner tub is added);
FIG. 9 is a schematic diagram of a waveform curve of a voltage signal output by the metal detection module along with time variation when metal foreign matter exists in the clothes put in the embodiment of the present invention;
FIG. 10 is a flowchart illustrating an embodiment of determining a type of metallic foreign matter in the clothes treating apparatus according to the present invention;
FIG. 11 is a schematic diagram illustrating the structural principle of a laundry treating apparatus according to an embodiment of the present invention;
in the figure: 1. a clothes throwing opening; 2. a metal detection module; 31. an infrared emission module; 32. an infrared receiving module; 4. and (5) controlling the system.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but rather to illustrate it for those skilled in the art by reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The present invention will be described in further detail with reference to examples.
Example one
As shown in fig. 1 to 11, the present embodiment discloses a control method of a clothes treatment device, wherein a metal detection module and an infrared sensing module are respectively disposed at a clothes input opening of the clothes treatment device;
the control method comprises the following steps: and when judging that the metal detection module and the infrared sensing module generate trigger signals, a control system of the clothes processing device gives an alarm, otherwise, the control system does not give an alarm.
The clothes treatment device provided by the invention can give an alarm only when the metal detection module and the infrared sensing module generate trigger signals and judge that the trigger signals are generated by the metal detection module due to the fact that metal foreign matters exist in passing clothes, so that the interference of the change of the magnetic field in the clothes treatment device, caused by the shaking of the inner cylinder or the knocking of the shell of the clothes treatment device, on metal detection can be effectively shielded, the identification accuracy of the metal detection module is improved, the phenomenon of false triggering of the alarm is reduced, and the use experience of a user is improved.
Further, the control system gives an alarm when judging that the metal detection module and the infrared induction module generate the trigger signal at the same time, or when judging that the metal detection module and the infrared induction module generate the trigger signal within a set time difference range, the control system does not give an alarm otherwise.
Further, in an embodiment, as shown in fig. 2, during the operation of the laundry processing apparatus, if it is determined that the metal detection module generates the metal trigger signal, it is further determined whether the infrared sensing module also generates the infrared trigger signal within a set time difference range, and if so, an alarm is given; if not, no alarm is given.
Preferably, if it is determined that the infrared sensing module is also in the trigger state within the first T0 seconds or the last T0 seconds of the generation of the trigger signal by the metal detection module if the time difference range is set to T0 seconds, it may be inferred that the metal detection module is triggered by the metal foreign matter in the thrown clothes, rather than the interference of vibration of the inner tub, opening and closing of the lid, or knocking of the box body, an alarm is given.
In the above scheme, T0 is obtained according to a simulation release experiment and a corresponding calculation formula, the size of T0 mainly depends on the gap distance between the metal detection module and the infrared sensing module in the inner barrel axial direction, the larger the gap distance between the metal detection module and the infrared sensing module is, the larger T0 is, and otherwise, the smaller T0 is.
Specifically, in one embodiment, if the metal detection module is arranged at a set height position above the infrared sensing module, within T0 seconds after the metal detection module generates the trigger signal, if it is determined that the infrared sensing module is also in the trigger state, it can be inferred that the metal detection module is triggered by a metal foreign object in the thrown clothes, and an alarm is given, otherwise, no alarm is given.
In another embodiment, if the infrared sensing module is arranged at a set height position above the metal detection module, within T0 seconds before the metal detection module generates the trigger signal, if the infrared sensing module is also in a trigger state, it can be concluded that the metal detection module is triggered by metal foreign matters in the thrown clothes, an alarm is given, otherwise, no alarm is given.
In another embodiment, if the infrared sensing module and the metal detection module are arranged at the same height position in the clothes throwing port, the control system gives an alarm when judging that the metal detection module and the infrared sensing module both generate the trigger signal at the same time. In order to improve the detection efficiency of the metal foreign matter, in this embodiment, the infrared sensing module and the metal detection module are preferably disposed at the same height position.
In this embodiment, when the metal detection module generates the sensing signal, whether the infrared sensing module generates the infrared trigger signal at this time is determined, whether the infrared signal passing through the infrared sensing module is blocked, whether the infrared trigger signal is generated to determine whether clothes pass through the clothes input opening at this time, if the clothes pass through the clothes input opening, it can be inferred that the sensing signal generated by the metal detection module is caused by metal foreign matters in the input clothes, and then an alarm is given, otherwise, the alarm is not given, and the phenomenon of misjudgment of the metal detection module due to the vibration of the inner barrel and other reasons is effectively avoided.
Or, in another embodiment, the infrared sensing module is used for recording the putting time of the clothes, judging whether the detection signal of the metal detection module changes within the putting time, and giving an alarm if the metal detection module generates a metal trigger signal; and if the metal detection module generates a metal trigger signal in other time except the release time period, no alarm is given.
The application detects the input process of clothes through the infrared sensing module installed at the clothes input opening in the disc seat of the clothes treatment device, and meanwhile, the metal detection module detects whether metal foreign matters pass through the clothes input opening in real time. If two trigger signals occur simultaneously or before and after in the set time difference range, it indicates that metal foreign matters really enter the inner drum of the clothes processing device, but not the interference signals caused by knocking the machine body and shaking the inner drum.
Further, as shown in fig. 1, fig. 3, fig. 4, fig. 7 and fig. 11, the control method of the laundry treatment apparatus provided in this embodiment further includes the following steps:
acquiring an instantaneous slope value P of a metal induction signal output by a metal detection module in real time, and comparing the instantaneous slope value P with a set slope threshold value P0;
when the instantaneous slope value P of the metal induction signal is judged to be larger than a set slope threshold value P0, judging whether the infrared induction signal is in a trigger state at the moment;
if yes, alarming; if not, no alarm is given.
In the scheme, the instantaneous slope value of the metal sensing signal output by the metal detection module is used as a judgment basis for judging whether the metal trigger signal is generated, so that the identification rate of the metal detection module on small metal objects can be effectively improved, and the metal identification rate is higher.
Referring to fig. 3 to 6, when it is determined that the instantaneous slope value of the metal sensing signal is greater than the set slope threshold, the metal detection module is in a triggered state, and the metal detection module is triggered, which may be caused by metal foreign matters in the thrown clothes or internal interference such as vibration of the inner tub, and further determines whether the infrared sensing signal of the infrared sensing module is blocked, so as to determine whether clothes pass through the clothes throwing port, and infer whether the metal detection module is triggered by the metal foreign matters in the thrown clothes, and if so, the state flag is 3, and the clothes processing device gives an alarm; if the laundry machine is caused by the shaking of the inner tub, as shown in fig. 5, the status flag is 2, and the laundry machine does not give an alarm.
It should be noted that different numbers of the flag bits shown in fig. 3 and 5 represent different states of the laundry treatment apparatus, where the flag bit is 1 or close to 1, and represents that the laundry is normally put in; the flag bit is 2 or close to 2, which represents that the output voltage is greater than the dynamic average threshold value and the instantaneous slope value is greater than the set slope threshold value; the flag bit is 3 or close to 3, and represents that the metal detection module and the infrared sensing module simultaneously generate a trigger signal. When the infrared signal is 1, the infrared sensing module is in a triggered state, and clothes pass through the putting-in opening; when the infrared signal is 0, the infrared sensing module is in an un-triggered state, and no clothes pass through the clothes throwing port.
Further, as shown in fig. 1, fig. 3, and fig. 4, when it is determined that the metal sensing signal output by the metal detection module exceeds the set dynamic average threshold, the step of obtaining the instantaneous slope value of the output metal sensing signal in real time is performed again. In this embodiment, when the metal sensing signal exceeds the set dynamic average threshold, the step of determining whether the metal detection module generates the trigger signal is performed, and when the metal sensing signal of the metal detection module generates a slight fluctuation, the instantaneous slope value and the set slope threshold of the metal sensing signal are not determined, so that the phenomenon of resource waste is reduced, and the whole determination process is simplified and rationalized.
Preferably, as shown in fig. 3 to 7, in this embodiment, the metal sensing signal is a voltage signal, when it is determined that the voltage signal output by the metal detection module is lower than the set dynamic average threshold V0, the instantaneous slope value of the voltage signal and the set voltage slope threshold are determined, and when it is determined that the instantaneous slope value of the voltage signal is greater than the set voltage slope threshold, it is inferred that the metal detection module generates the metal trigger signal, and it is determined whether the infrared signal is in the trigger state at this time.
The calculation method of the dynamic average threshold V0 in the above scheme is as follows:
In this embodiment, the metal detection module generates the trigger signal according to a judgment result that an instantaneous slope value of the metal sensing signal is greater than a set slope threshold; the infrared sensing module generates a trigger signal according to the judgment that the infrared signal is in a shielded state. Specifically, as shown in fig. 11, the infrared sensing module includes an infrared transmitting module 31 and an infrared receiving module 32 symmetrically disposed at the laundry loading port 1 along the radial direction of the laundry loading port, and if the infrared receiving module 32 does not receive the infrared signal transmitted by the infrared transmitting module 31, it is concluded that the infrared sensing module is in the triggered state, and the laundry is loaded into the laundry loading port 1.
Further, as shown in fig. 7, the acquiring an instantaneous slope value of the metal sensing signal output by the metal detection module specifically includes the following steps:
collecting output voltage signals V1, V2, vn of a metal detection module;
drawing a detection waveform curve changing along with time t based on the collected output voltage signal;
when the output voltage signal is judged to be lower than the set dynamic average threshold value, the instantaneous slope value P = delta V/delta t of the output voltage signal is started to be calculated;
preferably, the output voltage signal has a sampling frequency of T1, Δ V = V n-2 -V n Δ T =2T1, instantaneous slope value P = (V) n-2 -V n ) and/2T 1. The instantaneous slope value is taken from the output voltage signals V of the first two points n-2 And V n The calculation and analysis are performed to obtain the instantaneous slope value, which is not limited to the output voltage signals of the first two points, but may be performed by taking the output voltage signals of the first three points or the first four points.
Or, put another way, when the output voltage signal is judged to be lower than the set dynamic average threshold value, the derivative of the output voltage signal at each point of the detection waveform curve is obtained, when the derivative is judged to be larger than the set threshold value, the metal detection module can be judged to generate the trigger signal, and whether the infrared sensing module is in the trigger state at the moment is judged.
Preferably, in this embodiment, the instantaneous slope value P is directly Δ V, i.e. V n-2 -V n The difference value of (2) can also be used for judging whether the metal detection module generates the trigger signal or not according to the instantaneous drop value of the voltage signal, the effect same as that of the instantaneous slope value can be achieved, and the judging step can be simplified.
Preferably, as shown in fig. 3 to fig. 6, the sampling frequency of the output voltage signal is one point every 10 to 20ms, i.e. 20ms ≧ T1 ≧ 10ms.
According to the method, by means of the time coincidence width, when the output voltage signal of the metal detection module is judged to be reduced to be lower than the dynamic average threshold value, the slope value is calculated, when the instantaneous slope value of the output voltage signal reaches the set slope threshold value, whether the infrared sensing signal has a high level or not is judged, if the infrared sensing signal has the high level, an alarm is given, and if the infrared sensing signal has the high level, foreign matters cannot be given an alarm when the infrared triggering signal appears too early or too late, so that internal interference caused by shaking of an inner barrel, knocking of a disk seat or knocking of a box body to metal detection is shielded.
In another preferable aspect, referring to fig. 8, the laundry processing device provided in this embodiment further includes a vibration detecting device for detecting vibration of the inner tub, and the control method includes:
when the metal detection module and the infrared induction module are judged to generate trigger signals,
further judging whether the vibration detection device generates a trigger signal or not, if so, not giving an alarm; if not, alarming.
In the scheme, the trigger signal is used for generating vibration for the inner barrel, and the vibration amplitude of the inner barrel is larger than a set threshold value. When the metal detection module and the infrared sensing module generate trigger signals, whether the vibration detection device generates the trigger signals or not is further judged, and if the vibration detection device is also in a trigger state, no alarm is given.
The method mainly aims at the phenomenon that a user throws a plurality of pieces of clothes continuously, the clothes thrown in front hit the bottom of the inner barrel to trigger the metal detection module to generate a sensing signal, but the clothes behind just pass through the throwing opening, the infrared sensing module is still at a high level and is also in a triggered state, and therefore false alarm is caused, interference of extreme phenomena on metal detection results can be effectively shielded, and the accuracy of metal detection module identification is further improved.
Preferably, the vibration detecting device is an acceleration sensor disposed on the inner tub, and the acceleration sensor is mounted on the inner tub of the laundry processing device to measure whether the inner tub is vibrated or positionally deviated. Because the inner barrel is a large metal piece, the movement or the vibration of the inner barrel can generate induced current in the coil, and the detection of the coil on metal objects is influenced. When a user throws clothes, the impact of the clothes on the inner barrel can generate vibration, and the vibration is detected by the acceleration sensor. If the user throws many clothes in succession, and there is metal object in the preceding clothes of puting in of user, the in-process of whole throwing, the coil detects metal object at first and passes, the decline change appears in the metal signal, infrared signal is because sheltering from this moment, the high level state of infrared signal also can appear, the preceding clothes of puting in begins to strike interior bucket, the decline change once more of metal signal, the acceleration sensor signal appears simultaneously, the clothing of back has just still passed the clothing and puts in the mouth, infrared signal is the high level still, if there is not acceleration sensor this moment, the phenomenon of spurious triggering will appear.
Further, the clothes treatment device also comprises a voice alarm unit, and the control system controls the voice alarm unit to give out voice alarm prompt according to the judgment result.
Specifically, when the metal detection module and the infrared sensing module generate trigger signals, the voice alarm unit is controlled to send out related voice alarm prompts to remind a user of taking out metal foreign matters in clothes in time. When the metal detection module generates the trigger signal and the infrared sensing module does not generate the trigger signal, the alarm reminding is not carried out, and the interference of shaking of the inner barrel, knocking of the box body or knocking of the disk seat and the like on metal detection is eliminated.
Or, in another preferred scheme, when judging that the metal detection module, the infrared sensing module and the vibration detection device all generate trigger signals, the alarm reminding is not carried out, the phenomenon that the inner barrel shakes due to continuous throwing of heavy clothes is eliminated, the interference to metal detection is avoided, and the false alarm probability is further reduced.
Preferably, the laundry treating apparatus further includes a light display unit including at least a warning lamp and an interference lamp.
And when the clothes treatment device judges that the metal trigger signal is generated by the metal detection module due to the metal foreign matters in the thrown clothes, the alarm lamp is controlled to be turned on, and preferably, the alarm lamp is controlled to prompt a user in a flash mode.
And when the clothes processing device judges that the metal trigger signal is generated by the metal detection module due to internal interference such as inner barrel shaking or box knocking, the interference lamp is controlled to be on, and a user is prompted.
This application is based on electromagnetic induction and eddy current effect principle's metal detection mode, and the infrared sensing signal that superposes judges whether the clothing passes clothing processing apparatus dish seat, utilizes the time coincidence width mode of two-dimentional, realizes judging the metallic foreign matter, prevents to disturb the spurious triggering.
Referring to fig. 11, the present embodiment further provides a laundry treating apparatus, and a control method of the laundry treating apparatus is adopted.
Further, the clothes treatment device also comprises a box body and a tray arranged at the top of the box body, and the clothes input port 1 is arranged in the tray and used for a user to input or take out clothes. In this application, same high position in the disk seat is located to metal detection module 2 and infrared induction module, further guarantees the synchronism that the two detected, improves the recognition rate.
Furthermore, an annular mounting groove for mounting the metal detection module 2 is formed in the disc seat; the metal detection module comprises an annular probe with a metal detection coil inside, and the annular probe can be fixedly installed in the annular installation groove in a detachable mode through screws or buckles and the like.
The infrared induction module comprises an infrared emission module 31 and an infrared receiving module 32 which are symmetrically arranged in the annular mounting groove along the radial direction of the clothes throwing port 1. The infrared transmitting module 31 and the infrared receiving module 32 are installed on the same horizontal plane with the metal detection coil, so that time synchronization is ensured.
The metal detection module 2, the infrared emission module 31 and the infrared receiving module 32 are all connected with the control system 4 of the clothes treatment device to realize the transmission and control of signals with the clothes treatment device.
Preferably, in this embodiment, the annular mounting groove is located in the tray seat on the side away from the inner barrel, so that the metal detection coil is as far away from the inner barrel as possible, leaving enough falling height to distinguish the metal signal from the signal striking the inner barrel.
In this embodiment, the laundry processing apparatus may be a laundry processing device such as a pulsator washing machine, a drum washing machine, a washing and drying machine, or a clothes dryer.
Example two
As shown in fig. 9 and 10, the present embodiment provides a control method of a laundry processing apparatus based on the first embodiment, and mainly aims to solve the problem that the existing laundry processing apparatus with a metal detection function cannot accurately determine the type of the metal foreign matter.
In the control method of a clothes processing apparatus provided in this embodiment, when it is determined that both the metal detection module and the infrared sensing module generate the trigger signal, the following steps are further performed:
and drawing a detection waveform curve changing along with time t based on the voltage signal output by the metal detection module, extracting the data characteristics of the detection waveform curve, and analyzing and judging the type of the metal foreign matter according to the data characteristics.
According to the embodiment, the type of the metal foreign matter is analyzed and judged according to the extracted data characteristics of the measured waveform curve, the control system of the clothes treatment device can accurately judge the type of the metal foreign matter and remind a user of the type of the metal foreign matter, the intelligent degree of the clothes treatment device is improved, the man-machine interaction capacity is higher, and the use experience of the user is improved.
Further, as shown in fig. 9 and fig. 11, the control method further includes the following steps:
extracting a peak voltage Vb when the detected waveform curve drops to a b point at the lowest point, and calculating a drop value delta Vb = V0-Vb of a voltage signal at the b point;
and comparing and analyzing the drop value delta Vb of the voltage signal with preset first judgment data, and judging the type of the metal foreign matter according to the analysis result.
In the above solution, V0 is the dynamic average threshold set as described in the first embodiment.
As shown in table 1 below, in one embodiment, the preset first determination data includes a first preset parameter threshold. And judging and comparing the drop value delta Vb of the voltage signal with a first preset parameter threshold value X1, and deducing the type of the metal object according to the judgment result.
| ΔV | Item determination | |
| ≤ | Article | 1 |
| ＞ | Article | 2 |
TABLE 1
In another embodiment, the preset first determination data includes a first set value range, and the type of the metal object is inferred by determining the range of the drop value Δ Vb of the extracted voltage signal. The range of the first set value interval at least comprises two or more value intervals, and different value intervals correspond to different types of metal articles.
Further, the control method provided by this embodiment further includes: setting a point at which the falling edge of the detection waveform curve reaches a set voltage threshold value V0 as a point a, and acquiring the slope K of the point ab ab ；
Respectively comparing the falling value delta Vb of the voltage signal at the point b with preset first judgment data and slope K ab And comparing and analyzing the data with preset second judgment data, and judging the type of the metal foreign matters according to the analysis result.
Specifically, as shown in table 2 below, in one embodiment, the preset second determination data includes a second preset parameter threshold, and the magnitude and the slope K of the drop value Δ Vb of the voltage signal and the first preset parameter threshold X1 are determined and compared ab And the size of the second preset parameter threshold value Y1, and deducing the type of the metal object according to the judgment result.
TABLE 2
Or, in another embodiment, the preset first determination data includes a first set value range, the preset second determination data includes a second set value range, and the first set value range and the K are determined by determining the first set value range in which the drop value Δ Vb of the extracted voltage signal is located, the K being the same as the first set value range in which the drop value Δ Vb of the extracted voltage signal is located ab And deducing the type of the metal object in the second set value interval range. The second range of the predetermined value interval at least includes two or more value intervals. Through the judgement mode that adopts interval scope, can distinguish the metallic foreign body of judging more quantity, the detection of metallic foreign body type is more comprehensive abundant, more can satisfy user's user demand.
Of course, in the present embodiment, it is not limited to passing only the falling value Δ Vb and the slope K of the voltage signal ab The two data characteristics can be used for judging the type of the metal foreign matter, for exampleT bc Data characteristic ratio Q = delta Vb/T bc And judging the type of the metal foreign matter according to the data characteristics.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The control method of the clothes treatment device is characterized in that a metal detection module and an infrared induction module are respectively arranged at a clothes putting opening of the clothes treatment device;
the control method comprises the following steps: and when judging that the metal detection module and the infrared induction module generate trigger signals, the control system of the clothes processing device gives an alarm, otherwise, the control system does not give an alarm.
2. The control method of a laundry treatment apparatus according to claim 1, wherein the control system gives an alarm when it is determined that the metal detection module and the infrared sensing module generate the trigger signal at the same time, or when the trigger signal is generated within a set time difference range, or otherwise, does not give an alarm.
3. The control method of a clothes treating apparatus according to claim 1 or 2, wherein if the metal detecting module is judged to generate the metal trigger signal during the operation of the clothes treating apparatus,
further judging whether the infrared sensing module generates an infrared trigger signal within a set time difference range, and if so, alarming; if not, no alarm is given;
preferably, if the time difference range is set to be T0 seconds, within the first T0 seconds or the last T0 seconds of the trigger signal generated by the metal detection module,
if the infrared sensing module is judged to be in a triggering state, the fact that the metal detection module is triggered by metal foreign matters in the thrown clothes can be inferred, and then an alarm is given, otherwise, the alarm is not given.
4. The control method of a laundry treating apparatus according to any one of claims 1-3, further comprising the steps of:
acquiring an instantaneous slope value of a metal sensing signal output by a metal detection module in real time, and comparing the instantaneous slope value with a set slope threshold value;
when the instantaneous slope value of the metal induction signal is judged to be larger than a set slope threshold value, judging whether the infrared induction signal is in a trigger state at the moment;
if yes, alarming; if not, no alarm is given;
preferably, when it is determined that the metal sensing signal output by the metal detection module exceeds a set dynamic average threshold, the step of obtaining the instantaneous slope value of the output metal sensing signal in real time is started.
5. The control method of a laundry processing apparatus according to claim 4, wherein said obtaining the instantaneous slope value of the metal sensing signal outputted by the metal detection module comprises the following steps:
collecting output voltage signals V1, V2, vn of a metal detection module;
drawing a detection waveform curve changing along with time t based on the collected output voltage signal;
when the output voltage signal is judged to be lower than the set dynamic average threshold value, starting to calculate the instantaneous slope value P = delta V/delta t of the output voltage signal;
preferably, the output voltage signal has a sampling frequency of T1, Δ V = V n-2 -V n Δ T =2T1, instantaneous slope value P =(V n-2 -V n )/2T1；
Preferably, said instantaneous slope value P is directly taken as Δ V, i.e. V n-2 -V n A difference of (d);
preferably, the sampling frequency of the output voltage signal is one point every 10 to 20ms, namely 20ms is more than or equal to T1 and more than or equal to 10ms.
6. The control method of a laundry treating apparatus according to any one of claims 1-5, further comprising a vibration detecting device for detecting vibration of the inner tub, the control method comprising:
when the metal detection module and the infrared induction module are judged to generate trigger signals,
further judging whether the vibration detection device generates a trigger signal or not, if so, not giving an alarm; if not, alarming;
preferably, the vibration detecting device is an acceleration sensor provided on the inner tub.
7. The control method of a clothes treating apparatus according to any one of claims 1 to 6, wherein the clothes treating apparatus further comprises a voice alarm unit, and the control system controls whether the voice alarm unit gives a voice alarm prompt according to the judgment result;
preferably, the laundry treating apparatus further includes a light display unit including at least a warning lamp and an interference lamp.
8. A laundry treating apparatus, characterized in that the control method of the laundry treating apparatus according to any one of claims 1 to 7 is adopted.
9. The laundry treating apparatus according to claim 8, further comprising a tray, the laundry input port being provided in the tray;
the metal detection module and the infrared sensing module are arranged at the same height position in the disc seat.
10. The laundry treating apparatus according to claim 9, wherein an annular mounting groove for mounting the metal detection module is provided in the tray;
the infrared induction module comprises an infrared emission module and an infrared receiving module which are symmetrically arranged in the annular mounting groove along the radial direction of the clothes throwing port.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111054869.0A CN115772774A (en) | 2021-09-09 | 2021-09-09 | Clothes processing device and control method thereof |
| PCT/CN2022/115468 WO2023036002A1 (en) | 2021-09-09 | 2022-08-29 | Laundry treatment apparatus and control method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111054869.0A CN115772774A (en) | 2021-09-09 | 2021-09-09 | Clothes processing device and control method thereof |
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| CN115772774A true CN115772774A (en) | 2023-03-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111054869.0A Pending CN115772774A (en) | 2021-09-09 | 2021-09-09 | Clothes processing device and control method thereof |
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| CN (1) | CN115772774A (en) |
| WO (1) | WO2023036002A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20230323586A1 (en) * | 2022-04-11 | 2023-10-12 | Infineon Technologies Ag | Laundry Machine, Associated System and Method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5659247A (en) * | 1994-03-10 | 1997-08-19 | Denver Dynamics, Inc. | Device for detecting metal objects passing through an opening |
| US6222450B1 (en) * | 2000-02-02 | 2001-04-24 | Denver Dynamics, Inc. | Metal detection device having improved support assembly |
| CN207552727U (en) * | 2017-11-29 | 2018-06-29 | 青岛胜腾电子有限公司 | A kind of washing machine with metal detection function |
| CN113138423B (en) * | 2021-03-12 | 2022-09-02 | 中国科学院信息工程研究所 | Metal detection method and device |
| CN217266409U (en) * | 2022-01-17 | 2022-08-23 | 合肥海尔洗衣机有限公司 | Metal detection module and clothes treatment equipment |
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2021
- 2021-09-09 CN CN202111054869.0A patent/CN115772774A/en active Pending
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