CN116145384A

CN116145384A - Clothes treatment equipment and metal foreign matter detection method

Info

Publication number: CN116145384A
Application number: CN202111375525.XA
Authority: CN
Inventors: 李传东; 许升; 赵爱玲; 王永君; 尹俊明
Original assignee: Qingdao Haier Washing Machine Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Washing Machine Co Ltd; Haier Smart Home Co Ltd
Priority date: 2021-11-19
Filing date: 2021-11-19
Publication date: 2023-05-23
Also published as: WO2023088312A1

Abstract

The invention discloses a clothes treatment device and a metal foreign matter detection method, wherein the clothes treatment device comprises a metal detection module and an infrared induction module which are arranged at a clothes putting opening; the metal foreign matter detection method comprises the following steps: if the interval time between the triggering signal generated by the infrared sensing module and the interference barrel signal sensed by the metal detecting module exceeds the set interval time, the user can be deduced to execute clothes taking action, and the alarm device is controlled to be not operated. According to the metal foreign matter detection method provided by the invention, whether the user throws clothes or takes clothes can be accurately distinguished and judged, when the interval time between the triggering signal generated by the infrared sensing module and the shaking bucket signal sensed by the metal detection module exceeds the set interval time, the user is inferred to execute the clothes taking action, the alarm device is controlled to be not operated, the trouble brought to the user by false alarm during clothes taking is avoided, and the use experience of the user is improved.

Description

Clothes treatment equipment and metal foreign matter detection method

Technical Field

The invention belongs to the technical field of clothes treatment equipment, and particularly relates to clothes treatment equipment and a metal foreign matter detection method.

Background

With the increasing level of living of people, the washing machine has become one of the necessary home appliances in the home, and most people use the washing machine as a main tool for washing clothes. Because the life rhythm of people is relatively fast, clothes pockets are often forgotten to be checked during clothes washing, and the clothes pockets often contain metal foreign matters such as coins, keys, metal ornaments, mobile phones, earphones and the like.

Because the clothing is continuously stirred repeatedly in the washing process, the metal foreign matters are likely to fall out of the pockets of the clothing and directly contact with the inner barrel of the washing machine, so that the inner barrel and the clothing of the washing machine are worn, small-size foreign matters such as coins, keys and metal ornaments are easy to clamp into gaps of the inner barrel, the inner barrel is likely to be blocked, the motor is overloaded and the like, the washing machine is seriously damaged or even damaged, and electronic products such as mobile phones and earphones cannot be used continuously after being immersed in water, and property loss of users is also caused.

Chinese patent application No. 201720188233.8 discloses a laundry treatment apparatus and a metal detecting device of the laundry treatment apparatus, the metal detecting device comprising: a base; the detection circuit is arranged on the base and is preset with a reference voltage value; a coil disposed on the base and connected to the detection circuit, the coil generating a magnetic field when energized, the magnetic field covering at least a portion of the base and having magnetic lines extending generally along a thickness direction of the base; and the alarm device is connected with the detection circuit, and the detection circuit generates a driving voltage for driving the alarm device to work when the metal object cuts magnetic lines, wherein the alarm degree of the alarm device changes along with the difference value between the voltage value of the driving voltage and the reference voltage value.

The clothing treatment equipment disclosed in the above application, though can detect whether there is metal in the clothing of putting in, but when getting the clothes, the user if have metal ornaments on hand, metal foreign matter such as bracelet, wrist-watch, bracelet, ring for very easily trigger alarm device false alarm for the accuracy of metal detection device discernment reduces, and user's use experience is not good.

In view of this, the present invention has been made.

Disclosure of Invention

The invention aims to solve the technical problems of overcoming the defects of the prior art, and provides a method for detecting metal foreign matters of clothes treatment equipment, which can accurately distinguish and judge whether a user throws clothes or takes clothes, and when judging that the user executes clothes taking action, the control alarm device does not work, so that the trouble brought to the user by false alarm when taking clothes is avoided, and the use experience of the user is improved.

To solve the above technical problems, a first aspect of the present application discloses a method for detecting metallic foreign matters of a laundry treatment apparatus, the laundry treatment apparatus including a metallic detection module and an infrared sensing module disposed at a laundry putting opening;

the detection method comprises the following steps: if the interval time between the triggering signal generated by the infrared sensing module and the interference barrel signal sensed by the metal detecting module exceeds the set interval time, the user can be deduced to execute clothes taking action, and the alarm device is controlled to be not operated.

Further, the method for determining the sloshing bucket signal comprises the following steps:

if the metal detection module generates a plurality of continuous waves exceeding a set number within a set time and the continuous waves show a converging trend, the generation of the barrel shaking signal can be judged.

Further, the method for detecting the metallic foreign matter of the clothes treatment equipment specifically comprises the following steps:

if the metal detection module senses the bucket shaking signal within a set interval time after the infrared sensing module generates the trigger signal, the user can be deduced to execute the clothes-throwing action, and the alarm device is controlled to keep a working state;

if the metal detection module senses the bucket shaking signal after the set interval time after the infrared sensing module generates the trigger signal, the user is inferred to execute the clothes taking action, and the alarm device is controlled to be not operated;

preferably, the set interval time is between 350ms and 450ms; more preferably, the set interval time is 400ms.

Further, the method for detecting metallic foreign matters of the clothes treatment device further comprises the following steps:

and if the metal detection module generates a metal trigger signal and the infrared sensing module also generates a trigger signal at the same time or within a set time difference range, alarming, otherwise, not alarming.

Preferably, the alarm device comprises an NFC module and an NFC alarm tag, and the method further comprises:

when the alarm device alarms, the NFC module writes alarm information into an NFC alarm tag, and the intelligent terminal triggers the NFC alarm tag in a short distance to read the alarm information;

preferably, the alarm information includes alarm time and/or metallic foreign matter information.

Further, the method for determining the metal triggering signal generated by the metal detection module comprises the following steps:

drawing a waveform curve based on the acquired output voltage signal of the metal detection module;

if the metal detection module generates a single signal wave and the output voltage signal reaches a first set voltage threshold;

it may be determined that a metal trigger signal is generated.

and extracting the data characteristics of the signal wave, and comparing and analyzing the extracted data characteristics with preset judging data to judge the type of the metal foreign matters.

If the metal detection module generates a single signal wave and the output voltage signal reaches a second set voltage threshold;

further obtaining an instantaneous slope value of the voltage signal output by the metal detection module, and comparing the instantaneous slope value with a set slope threshold value;

if the instantaneous slope value is judged to be larger than the set slope threshold value, the generation of the metal trigger signal can be judged.

In a second aspect of the present application, there is also provided a laundry treatment apparatus, employing any one of the above-described laundry treatment apparatus metal foreign matter detection methods.

Further, the metal detection module comprises a transmitting coil and a receiving coil which are arranged on two opposite sides of the clothes putting opening;

preferably, the transmitting coil and the receiving coil are positioned on the same horizontal plane and are positioned at the same height as the infrared induction module.

Further, the transmitting coil and the receiving coil are of arc-shaped structures or strip-shaped structures symmetrically arranged along the radial direction of the clothes putting opening;

preferably, the length of the transmitting coil and the receiving coil is set to be L, and the diameter of the clothes putting opening is set to be D, wherein l=1/3D.

By adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects.

1. According to the metal foreign matter detection method provided by the invention, whether the user throws clothes or takes clothes can be accurately distinguished and judged, when the interval time between the triggering signal generated by the infrared sensing module and the shaking bucket signal sensed by the metal detection module exceeds the set interval time, the user is inferred to execute clothes taking action, the alarm device is controlled to be not operated, the trouble brought to the user by false alarm during clothes taking is avoided, and the use experience of the user is improved.

2. According to the metal foreign matter detection method provided by the invention, the metal detection module generates the metal trigger signal and simultaneously generates the trigger signal or the infrared sensing module generates the trigger signal within the set time difference range, so that an alarm can be given, otherwise, the alarm is not given, whether the metal detection module generates the metal trigger signal due to the fact that the metal foreign matter exists in the put clothes can be accurately judged, the interference of the change of the internal magnetic field of the clothes treatment equipment caused by external interference on metal detection is effectively shielded, the accuracy rate of the identification of the metal detection module is improved, and the phenomenon of false triggering alarm is reduced.

3. According to the clothes treatment equipment provided by the invention, the metal detection module detects the metal foreign matters in the put clothes by adopting the two arc-shaped or strip-shaped coils, compared with the traditional large annular coil, the coil has the advantages of smaller and more convenient volume, higher adaptation degree, convenience in installation and lower cost.

The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

In the drawings:

FIG. 1 is a flow chart of a method for detecting metallic foreign matters according to an embodiment of the present invention;

FIG. 2 is a flow chart of a method for detecting metallic foreign matters according to a second embodiment of the present invention;

FIG. 3 is a flow chart illustrating a method for detecting metallic foreign matters according to a third embodiment of the present invention;

FIG. 4 is a flow chart of a method for detecting a metal foreign object according to a fourth embodiment of the present invention;

FIG. 5 is a schematic diagram of a waveform curve in an embodiment of the present invention;

FIG. 6 is a graph showing the comparison of waveform curves of different kinds of metallic foreign matters according to the embodiment of the present invention;

FIG. 7 is a flow chart of simulated delivery in a sixth embodiment of the fourth embodiment of the invention;

FIG. 8 is a graph showing the variation of the output voltage signal values and the instantaneous slope values of different types of metallic foreign matters according to the embodiment of the present invention;

FIG. 9 is a schematic diagram showing changes of voltage signals, infrared signals and instantaneous slope values with time output by the metal detection module when metal foreign matters exist in put-in clothes in the embodiment of the invention;

FIG. 10 is a schematic diagram showing a comparison between an instantaneous slope value output by a metal detection module and a set slope threshold when there are metal foreign matters in a put-in laundry according to an embodiment of the present invention;

FIG. 11 is a schematic top view of a fifth embodiment of the garment treatment apparatus of the present invention;

FIG. 12 is a schematic side view of a garment treatment apparatus according to a fifth embodiment of the invention;

in the figure: 1. a metal detection module; 11. a transmitting coil; 12. a receiving coil; 21. an infrared emission end; 22. an infrared receiving end; 3. a tray seat; 301. a clothes putting port; 4. a box body.

It should be noted that these drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to the specific embodiments.

Detailed Description

The present invention will be described in further detail with reference to examples.

Example 1

The embodiment provides a method for detecting metallic foreign matters of clothes treatment equipment, wherein the clothes treatment equipment comprises a metal detection module and an infrared induction module, wherein the metal detection module is arranged at a clothes putting-in opening, and the metal detection module comprises an induction coil.

Specifically, as shown in fig. 1, the above detection method includes the following steps:

s101, if the infrared sensing module is judged to generate a trigger signal, the metal detection module senses a barrel shaking signal;

s102, acquiring the interval time T between the triggering signal generated by the infrared sensing module and the bucket shaking signal sensed by the metal detection module;

s103, judging whether the interval time T is larger than a set interval time TS or not; if yes, go to step S104; if not, executing step S105;

s104, deducing that the user executes clothes taking action and controlling the alarm device to be not operated;

s105, deducing that the user performs clothes throwing action, and controlling the alarm to keep working state.

In the above scheme, the process of throwing the clothes (without metal) is as follows: when infrared sensing module signal triggers, metal detection module does not detect metal trigger signal, and the clothing is put in the mouth and is free falling to the barrel head from the clothing, can strike interior barrel head, leads to interior barrel to rock, and metal detection module's induction coil produces wave signal, and metal detection module detects the shake barrel signal that smashes the barrel and bring.

The process of taking the garment (without metal) is as follows: the user stretches into the bucket, and infrared signal of infrared sensing module is sheltered from, and metal detection module does not detect metal triggering signal this moment, and the hand stretches into the bucket bottom, takes out the clothing, and the bucket that the clothing left the bucket bottom brought shakes the signal and is discerned by metal detection module, and metal detection module detects that the clothing left the bucket bottom and brought shakes the bucket signal.

Because the clothes are free falling from the clothes putting opening to the bottom of the barrel when throwing the clothes, the time is far less than the time for the hands of a user to extend from the clothes putting opening to the bottom of the barrel, the interval time between the triggering signal generated by the infrared sensing module and the shaking of the barrel signal sensed by the metal detecting module can be distinguished and judged to be the clothes taking action or the clothes throwing action of the user, and the alarm device is shielded when the clothes taking action is judged to be carried out.

According to the metal foreign matter detection method, whether the user throws clothes or takes clothes can be accurately distinguished and judged, when the fact that the interval time between the triggering signal generated by the infrared sensing module and the shaking bucket signal sensed by the metal detection module exceeds the set interval time is judged, the user is inferred to execute clothes taking action, the alarm device is controlled to be not working, trouble brought to the user by false alarm during clothes taking is avoided, and the use experience of the user is improved.

Further, in this embodiment, the method for determining the sloshing bucket signal includes:

Specifically, whether a sloshing tub signal is generated may be determined by whether the slope value of the wave is positive-negative alternating in a prescribed time and whether the signal value of the slope alternating point shows a decreasing trend.

In this embodiment, the set number and the set time are determined according to the material, the size, the height of the laundry treating apparatus and the multiple simulation of the shaking tub experiment.

The metal detection module generates 2 or more continuous waves within a set time, such as 2 seconds or 100 milliseconds, and the waves show a gradually converging trend, so that it can be determined that a sloshing barrel signal is generated.

Since the shaking of the inner barrel generally lasts for a certain time and does not disappear immediately, a plurality of continuous waves are generated, and the waves gradually converge along with the gradual weakening of the shaking, the shaking signal can be accurately judged by judging whether the continuous waves exceeding the set number are generated or not and judging whether the waves gradually converge or not.

In this embodiment, by adopting the above-mentioned determination method, the bucket shaking signal and the metal trigger signal can be effectively distinguished and determined, and the interference to signal determination caused by that electronic products such as mobile phones are located near the metal detection module can be effectively shielded.

preferably, the set interval time is between 350ms and 450ms; more preferably, the set interval time is 400ms. The set interval time is obtained by a tester through a large number of experiments.

According to the method for detecting the metallic foreign matters in the clothes processing equipment, when the interval time between the triggering signal generated by the infrared sensing module and the shaking bucket signal sensed by the metallic detection module exceeds the set interval time, the clothes taking action is deduced to be executed by a user, the alarm device is controlled to be not operated, the alarm is shielded, and the problems that the use experience of the user is affected due to the fact that the metallic ornament such as a bracelet, a watch, a bracelet, a ring and the like is arranged on the hand of the user when the user takes clothes can be effectively solved.

Example two

The embodiment provides a method for detecting metallic foreign matters in clothes treatment equipment on the basis of the first embodiment, and mainly describes how to detect metallic foreign matters in put clothes in detail.

As shown in fig. 2, the method for detecting metallic foreign matter of a laundry treatment apparatus according to the present embodiment includes:

According to the metal foreign matter detection method provided by the scheme, the metal detection module generates the metal trigger signal and the infrared sensing module also generates the trigger signal at the same time or within the set time difference range, so that an alarm can be given, otherwise, the alarm is not given, whether the metal detection module generates the metal trigger signal due to the fact that the metal foreign matter exists in the put clothes or not can be accurately judged, interference of the change of the internal magnetic field of the clothes treatment equipment caused by external interference on metal detection is effectively shielded, the accuracy rate of identification of the metal detection module is improved, and the phenomenon of false triggering alarm is reduced.

Specifically, if the time difference range is set to T0 seconds, in the previous T0 seconds or the later T0 seconds when the metal detection module generates the metal trigger signal, if it is determined that the infrared sensing module generates the trigger signal, it can be inferred that the metal trigger signal is generated due to the metal foreign matter in the put clothes, and is not the interference of the switch cover or the nearby electronic metal equipment.

The T0 is obtained according to a simulated putting experiment and a corresponding calculation formula, the size of the T0 mainly depends on the interval distance between the metal detection module and the infrared induction module in the axial direction of the inner barrel, and the larger the interval distance between the metal detection module and the infrared induction module is, the larger the T0 is, and the smaller the T0 is otherwise.

Specifically, in one embodiment, the metal detection module is disposed above the infrared sensing module, and if the infrared sensing module is judged to also generate the trigger signal within T0 seconds after the metal detection module generates the metal trigger signal, it can be inferred that the metal detection module triggered by the metal foreign matter in the put-in clothes alarms, otherwise, no alarm is performed.

In another embodiment, the infrared sensing module is disposed above the metal detection module, and if the metal detection module is judged to also generate the metal trigger signal within T0 seconds after the infrared sensing module generates the trigger signal, it can be inferred that the metal detection module is triggered by the metal foreign matter in the put-in clothes, then an alarm is given, otherwise no alarm is given.

In a preferred implementation manner of this embodiment, the infrared sensing module and the metal detection module are disposed at the same height, and when it is determined that the metal detection module generates the metal trigger signal, the infrared sensing module generates the trigger signal, so that an alarm can be given, and the detection efficiency of the metal foreign matters is further improved.

In this embodiment, the metal detection module and the infrared sensing module are preferably located at the same height, and even if there is a certain height difference, the height difference is relatively small and negligible, so the set time difference range is close to 0.

Further, in one implementation manner of this embodiment, the method for determining that the metal detection module generates the metal trigger signal specifically includes the following steps:

s201, drawing a waveform curve based on the acquired output voltage signals of the metal detection module;

s202, if the metal detection module generates a single signal wave and the output voltage signal reaches a first set voltage threshold;

s203, it can be determined that the metal trigger signal is generated.

In the above scheme, if metal passes through the clothes input port, the induced voltage of the metal detection module generates larger signal fluctuation and generates a downward signal wave, and if the output voltage value of the metal detection module is judged to reach or be lower than a first set voltage threshold value, the metal passing can be judged.

In this embodiment, the first set voltage threshold is a set dynamic average threshold V0, and the calculation method is as follows:

V0＝V _mean -R, r=5mv, k=100 points.

In a preferred implementation manner of this embodiment, the alarm device includes an NFC module and an NFC alarm tag, and the method further includes:

preferably, the alarm information includes alarm time and/or metallic foreign matter information, more preferably, the metallic foreign matter information includes the number and/or kind of metallic foreign matters.

In this embodiment, when the alarm device alarms, the NFC module may write alarm information into the NFC alarm tag, record information such as alarm time and/or the number and/or the type of metal foreign matters, so that even if the user does not hear the alarm beside the clothes processing device temporarily, the user may identify the NFC alarm tag through the intelligent terminal, such as a mobile phone with NFC function, and query information such as alarm time and/or the number and/or the type of metal foreign matters, so that the use experience is better.

Example III

The present embodiment provides a method for detecting metallic foreign matters of a laundry treatment apparatus, which is different from the second embodiment in that: when judging whether a metal trigger signal is generated, a judging step of outputting an instantaneous slope value of a voltage signal and a set slope threshold value is added so as to improve the recognition rate of small metal foreign matters.

Specifically, referring to fig. 3 and fig. 8 to fig. 10, the method for determining that the metal detection module generates the metal trigger signal according to the present embodiment includes the following steps:

s301, drawing a waveform curve based on the acquired output voltage signals of the metal detection module;

s302, if the metal detection module generates a single signal wave and the output voltage signal reaches a second set voltage threshold;

s303, further acquiring an instantaneous slope value of the voltage signal output by the metal detection module, and comparing the instantaneous slope value with a set slope threshold;

and S304, if the instantaneous slope value is judged to be larger than the set slope threshold value, judging that a metal trigger signal is generated.

In the above scheme, the second set voltage threshold is smaller than the first set voltage threshold, and through the step of determining the added instantaneous slope value and the set slope threshold, compared with the second embodiment, the size of the voltage threshold can be reduced based on the first set voltage threshold, because if the voltage threshold is set too large, the voltage signal output by the metal detection module when the metal foreign matter of some small pieces passes through is relatively low, the set voltage threshold may not be reached, and a missing detection phenomenon may occur.

In this embodiment, by reducing the set voltage threshold and adding the step of judging the instantaneous slope value and the set slope threshold, erroneous judgment and missing detection can be avoided, and the accuracy of identification and the high identification rate of small metal objects can be effectively ensured.

Further, when the voltage signal output by the metal detection module exceeds the second set voltage threshold, the step of acquiring the instantaneous slope value of the output voltage signal in real time is started to be executed again, and when the output voltage signal of the metal detection module generates tiny fluctuation, the instantaneous slope value of the output voltage signal and the set slope threshold are not judged, so that the phenomenon of no intolerance of resource waste is reduced, and the whole judging process is simplified and rationalized.

Further, referring to fig. 5 and fig. 8 to fig. 10, the step of obtaining the instantaneous slope value of the output voltage signal output by the metal detection module specifically includes the following steps:

s401, collecting output voltage signals V1, V2 and V.sub.N. and V.sub.n of the metal detection module;

s402, drawing a detection waveform curve changing along with time t based on the acquired output voltage signal;

s403, when it is determined that the output voltage signal is lower than the second set voltage threshold, starting to calculate an instantaneous slope value p=Δv/Δt of the output voltage signal;

Preferably, the output voltage signal has a sampling frequency of T1, Δv=v _n-2 -V _n Δt=2t1, instantaneous slope value p= (V) _n-2 -V _n ) 2T1. The instantaneous slope value takes the output voltage signal V of the first two points _n-2 And V is equal to _n The calculation analysis is not limited to taking the output voltage signals of the first two points, and the instantaneous slope value can be calculated by taking the output voltage signals of the first three points and the first four points.

Or stated another way, when the output voltage signal is judged to be lower than the second set voltage threshold, the derivative of the output voltage signal at each point of the detection waveform curve is obtained, and when the derivative is judged to be greater than the set threshold, the metal detection module can be judged to generate a trigger signal, and whether the infrared sensing module is in a trigger state at the moment is judged.

Preferably, in this embodiment, the instantaneous slope value P takes DeltaV directly, i.e. V _n-2 -V _n The difference value of the voltage signal can also be used for judging whether the metal detection module generates a trigger signal or not, the same effect as the instantaneous slope value can be achieved, and the judging step can be simplified.

Preferably, the sampling frequency of the output voltage signal is one point every 10-20 ms, namely 20ms is more than or equal to T1 is more than or equal to 10ms.

According to the method for detecting the voltage signal of the metal detection module, through a time coincidence width method, when the output voltage signal of the metal detection module is judged to be lower than a second set voltage threshold value, an instantaneous slope value is calculated, when the instantaneous slope value of the output voltage signal reaches the set slope threshold value, whether the infrared sensing module has high level is judged, and if the infrared sensing module has high level, an alarm is given.

Example IV

The present embodiment provides a method for detecting metallic foreign matters of a laundry treatment apparatus on the basis of the second embodiment, which is different from the second embodiment in that: the embodiment can judge the type of the metal foreign matter according to the data characteristics of the extracted signal wave.

The method for detecting metallic foreign matters in a laundry treatment apparatus according to the present embodiment further includes the steps of:

and extracting the data characteristics of the signal wave, comparing and analyzing the extracted data characteristics with preset judging data, and judging the type of the metal foreign matters.

Specifically, as shown in fig. 4, the method for detecting metallic foreign matters in the laundry treatment apparatus according to the present embodiment specifically includes the steps of:

s501, drawing a waveform curve based on the acquired output voltage signal of the metal detection module;

s502, if the metal detection module generates a single signal wave and the output voltage signal reaches a first set voltage threshold;

S503, extracting data characteristics of the signal wave, and comparing and analyzing the extracted data characteristics with preset judging data to judge the type of the metal foreign matters;

s504: reminding a user to put in the types of the metal foreign matters in the clothes.

According to the method and the device, when the metal foreign matters exist in the clothes put in the clothes treatment equipment, the types of the metal foreign matters are further judged, the data characteristics of the detection waveform curve are extracted, the extracted data characteristics are compared and analyzed with the preset judging data, the types of the metal foreign matters are judged, the users are reminded of the types of the metal foreign matters, the intelligent degree of the clothes treatment equipment is improved, the man-machine interaction capability is stronger, and the use experience of the users is improved.

Further, referring to fig. 5, the extracting the data characteristic of the signal wave includes the following steps:

acquiring a voltage signal Vmin of a lowest point b point in a signal wave curve, and obtaining a voltage difference V according to the first voltage threshold V0 and the lowest point voltage signal Vmin _pp ；

Setting the point of the falling edge of the signal wave curve reaching the first voltage threshold V0 as a point a, and the point of the rising edge reaching the voltage threshold V0 as a point c;

acquiring the slope K of the ab point _ab Slope K of bc point _bc Time difference T of bc point _bc Characteristic parameter ratio q=v _pp ÷T _bc ；

Extracting data features K _ab 、K _bc 、T _bc 、Q＝V _pp ÷T _bc And saved.

The data features extracted in this embodiment include, but are not limited to: voltage difference V _pp Slope K _ab Slope K _ab Time difference T _bc Characteristic parameter ratio q=v _pp ÷T _bc Any one or any combination thereof. Of course, other defined data features may be used, such as feature parameter ratios and slope K _ab And a time difference T _bc Is a ratio of (2).

Due to the outline and material of different kinds of metallic foreign mattersDifferent quality, shape, size, etc., and the different parameters affect the output voltage signal of the metal detection module, and further affect the voltage difference V of the data characteristic parameters _pp Slope K _ab Slope K _ab Time difference T _bc Characteristic parameter ratio q=v _pp ÷T _bc Therefore, in this embodiment, the data features of the extracted different types of metal foreign matters are compared with the preset determination data to distinguish and determine the types of the metal foreign matters.

The method for judging the type of the metal foreign matter in the embodiment specifically includes the following six embodiments:

embodiment one

In this embodiment, the method for detecting a metal foreign object includes a one-dimensional judgment mode, the extracted data features include first data features, and the preset judgment data includes a first preset parameter threshold.

The one-dimensional judging mode includes: judging and comparing the first data characteristic with a first preset parameter threshold value, and deducing the type of the metal foreign matters according to a judging result.

Referring to fig. 5, 6, 8 and table 1, if the user only needs to determine two kinds of metal foreign matters, a one-dimensional determination mode is selected, and the first data feature takes the voltage difference V _pp . The metal components and total amounts of the different metal foreign matters are different, the induction voltages caused by the coils are different, and the voltage difference V is calculated _pp The value can distinguish the metal foreign matter with larger metal content.

For example, judging the mobile phone and the car key, as shown in fig. 3, putting the mobile phone, the bluetooth headset and the detection waveform curve of the car key, and obviously showing that the detected waveform curve is the mobile phone V _pp Maximum, vehicle key V _pp Minimum, judge V through one-dimensional judgement mode _pp The size of the (c) can detect what metal foreign matter is specifically. For example, when the clothes treatment equipment leaves the factory, a tester simulates to put in and detect the mobile phone V _pp Greater than 50mV, vehicle key V _pp And the first preset parameter threshold value is X1, and X1 is 40mV less than 30 mV.

V _pp	Article judgment
		≤X1	Article	1
＞X1	Article 2

Table 1

In the actual working process of the clothes treatment equipment, judging the voltage difference V _pp And the magnitude of the first preset parameter threshold value X1, when judging that the voltage difference value V _pp And when the voltage is less than or equal to 40mV, deducing that the metallic foreign matters put in the clothes are car keys, and reminding a user. When judging the voltage difference V _pp When the voltage is greater than 40mV, the foreign metal in the put clothes is inferred to be a mobile phone, and the user is reminded.

In the above scheme, the first preset parameter threshold value X1 and the one-dimensional judging mode are stored in the storage unit of the clothes treating apparatus when the clothes treating apparatus leaves the factory. When the clothes treatment equipment is upgraded in a networking mode, the size of the first preset parameter threshold value X1 is correspondingly optimized.

Or in another preferred embodiment, the clothes treatment device is provided with a simulated putting program, and the user can actively optimize the first preset parameter threshold value through the simulated putting program.

In this embodiment, the first data feature in the one-dimensional determination mode may also take a slope K _ab Slope K _bc Time difference T _bc Characteristic parameter ratio q=v _pp ÷T _bc Any one of the above.

As shown in table 2 below, the first data feature may take a feature parameter ratio Q, where the first preset parameter threshold is N1, and in an actual process of the laundry treatment apparatus, if the feature parameter ratio Q is less than or equal to N1, it is inferred that the type of the metallic foreign matter in the laundry is item 1, and if Q is determined to be greater than N1, it is inferred that the type of the metallic foreign matter in the laundry is item 2.

Q	Article judgment
		≤N1	Article	1
＞N1	Article 2

Table 2

Second embodiment

The method for detecting the metallic foreign matter of the clothes treatment equipment provided by the embodiment comprises a two-dimensional judging mode, wherein the extracted data features further comprise second data features, and the preset judging data further comprise a second preset parameter threshold value.

The two-dimensional judging mode includes: and respectively judging and comparing the first data characteristic with a first preset parameter threshold value and the second data characteristic with a second preset parameter threshold value, and deducing the type of the metal foreign matter according to a judging result.

Specifically, as shown in Table 3 in conjunction with FIGS. 5-6, V is similar to that of a Bluetooth key and a car key _pp The type of the metal foreign matter can be further distinguished and judged by comparing the second data characteristics.

For example, as shown in Table 3, the first data characteristic may be taken as V _pp The first preset parameter threshold is X1; the second data is characterized by K _ab The second preset parameter threshold is Y1. When it is judged that V during the actual operation of the clothes treating apparatus _pp ≤X1、K _ab When Y1 is less than or equal to, the foreign metal is inferred to be the object 1; when judging V _pp ≤X1、K _ab If Y1 is greater than Y1, it can be inferred that the foreign metal is article 3; when judging V _pp ＞X1、K _ab When Y1 is less than or equal to, the foreign metal is inferred to be the object 2; when judging V _pp ＞X1、K _ab If Y1, it is estimated that the foreign metal is the article 4.

Of course, in the present embodiment, in the two-dimensional judging mode, the first data feature and the second data feature may be the voltage difference V _pp Slope K _ab Slope K _ab Time difference T _bc Characteristic parameter ratio q=v _pp ÷T _bc Any two of which are combined.

TABLE 3

Embodiment III

The method for detecting metallic foreign matters in a clothes treatment device further includes a three-dimensional judging mode, the extracted data features further include third data features, and the preset judging data further includes a third preset parameter threshold.

As shown in fig. 5, 6 and table 4, the three-dimensional judging mode includes: and respectively judging and comparing the first data characteristic with a first preset parameter threshold value, the second data characteristic with a second preset parameter threshold value and the third data characteristic with a third preset parameter threshold value, and deducing the type of the metal foreign matters according to the judging result.

As shown in Table 4, the first data characteristic may be taken as V _pp The first preset parameter threshold is X1; the second data is characterized by K _ab Second, secondThe preset parameter threshold is Y1; the third data is characterized by K _bc The third preset parameter threshold is Z1. When it is judged that V during the actual operation of the clothes treating apparatus _pp ≤X1、K _ab When Y1 is less than or equal to K _bc If Z1 is less than or equal to the value, the foreign metal is inferred to be the object 1; when judging V _pp ≤X1、K _ab When Y1 is less than or equal to K _bc If Z1 is greater than the above value, it can be inferred that the foreign metal is the article 5; when judging V _pp ≤X1、K _ab ＞Y1、K _bc If Z1 is less than or equal to, then the foreign metal is inferred to be the object 3; when judging V _pp ≤X1、K _ab ＞Y1、K _bc If Z1 is greater than the above, it is assumed that the foreign metal is the article 6, and as shown in Table 4, eight kinds of foreign metal can be estimated in total.

Table 4

Fourth embodiment

In this embodiment, the method for detecting a metal foreign object further includes a four-dimensional judgment mode, the extracted data features further include a fourth data feature, and the preset judgment data further includes a fourth preset parameter threshold. The four-dimensional judgment mode includes: and respectively judging and comparing the first data characteristic with a first preset parameter threshold value, the second data characteristic with a second preset parameter threshold value, the third data characteristic with a third preset parameter threshold value and the fourth data characteristic with a fourth preset parameter threshold value, and deducing the type of the metal foreign matter according to a judging result.

As shown in Table 5, the first data characteristic may be taken as V _pp The first preset parameter threshold is X1; the second data is characterized by K _ab The second preset parameter threshold is Y1; the third data is characterized by K _bc The third preset parameter threshold is Z1; the fourth data feature is T _bc The fourth preset parameter threshold is M1.

The metal foreign matter detection method provided by the embodiment can accurately judge the types of the metal foreign matters, is simple and efficient, can effectively detect up to sixteen types of metal foreign matters through a four-dimensional judgment mode, is more comprehensive and rich in detection of the types of the metal foreign matters, and can meet the use demands of most users.

Table 5

In this embodiment, the clothes processing apparatus may default to any one of the first to fourth embodiments, and preferably, since the detection of the metal foreign matter type in the four-dimensional determination mode is more comprehensive and abundant, the default determination mode of the clothes processing apparatus may be set to the four-dimensional determination mode.

Preferably, in the method for detecting metal foreign matters provided in this embodiment, a user may switch to select a judging mode according to actual needs through a control panel or a control terminal of the laundry treatment apparatus, for example, the one-dimensional judging mode is used to distinguish and judge headphones and car keys, and the user considers that the user may put the headphones and car keys into the laundry treatment apparatus in practice, so that the laundry treatment apparatus may be switched to the one-dimensional judging mode, which not only can meet the personalized needs of the user, but also can effectively improve the judging efficiency of the metal foreign matters.

Preferably, when the user switches among the one-dimensional judging mode, the two-dimensional judging mode, the three-dimensional judging mode and the four-dimensional judging mode, the display unit of the clothes processing device correspondingly displays the types of the detectable metal foreign matters corresponding to each judging mode, and certain convenience is provided for the user to select.

Fifth embodiment

The method for detecting metallic foreign matters in a clothes treatment apparatus according to the present embodiment is different from the first to fourth embodiments in that the preset determination data includes a plurality of numerical value range, and the type of metallic foreign matters is deduced by determining the range in which the extracted data features are located.

The laundry treatment apparatus includes a one-dimensional judgment mode in which the kind of the metallic foreign matter can be determined according to a first set numerical interval in which the extracted first data feature is located. The first set value interval at least comprises two or more value intervals, and different value intervals correspond to different types of metal foreign matters.

The laundry treating apparatus includes a two-dimensional judging mode in which the kind of the metallic foreign matter can be determined according to a first set value interval in which the extracted first data feature is located and a second set value interval in which the second data feature is located. The second set value interval at least comprises two or more value intervals. The laundry treating apparatus also includes a three-dimensional judging mode, a four-dimensional judging mode, a five-dimensional judging mode … ….

In this embodiment, the type of the metal foreign matter is determined by the numerical range, and the determination of a larger variety of metal foreign matters can be realized.

Embodiment six

The method for detecting metallic foreign matters of the clothes treatment equipment provided by the embodiment comprises the following steps:

simulating the throwing of the preset type of metal foreign matters, extracting the data characteristics of the simulated waveform curve of the preset type of metal foreign matters, and analyzing and storing;

in the subsequent clothes putting process, the data features extracted through actual detection are analyzed and compared with preset judging data stored in advance, and the types of the metal foreign matters are judged.

Further, as shown in fig. 7, the simulation of the throwing of the metal foreign matters of the preset type specifically includes:

starting a simulated putting program;

receiving and storing the metal foreign matter types input by a user;

collecting output voltage signals of the metal detection module, and recording the throwing times N;

judging whether the throwing times N reach the set times N0, if so, stopping simulating throwing, and packing and uploading the acquired output voltage signal data of N0 times to the cloud;

the cloud extracts the data characteristics of the simulated waveform curve when the cloud is put in each time, calculates an average value, serves as preset judging data of the metal foreign matters of the type, and sends the judging data to a control module of the clothes treatment equipment.

And in the subsequent working process of the clothes treatment equipment, the control module compares and analyzes the detected and extracted data characteristics with the preset judging data to judge the types of the metal foreign matters.

For example, the user can simulate the release of the key of the vehicle, set the simulated release for 5-10 times, and extract the voltage difference V of the simulated waveform curve during each release _pp ' and calculate the average voltage difference V between these 5 and 10 times _pp "as preset judgment data. In the actual operation process of the clothes treatment equipment, the voltage difference V extracted by actual detection is judged _pp Near the V _pp "or in said V _pp Within the setting range, the user can be reminded of the fact that the car key is put in the clothes.

Preferably, the laundry treating apparatus is provided with a voice recognition module, which can receive a kind of metallic foreign matter inputted by a user's voice.

In this embodiment, the clothes processing device performs simulated putting according to the metal foreign matters in the clothes that may be put in at home, extracts relevant simulated data features of the metal foreign matters of the specific type in the process of simulated putting, determines the type of the metal foreign matters actually put in the clothes as preset determination data in the subsequent actual work of the clothes processing device, and makes detection of the metal foreign matters more targeted and accurate by the added simulated putting program, thereby meeting the personalized demands of the user.

And the parameter threshold value of the preset judging data of the clothes treatment equipment can be optimized through the additionally arranged simulated putting program, so that the type of the metal foreign matters actually put into the clothes treatment equipment by a user can be accurately judged.

Example five

As shown in fig. 11 to 12, the present embodiment provides a laundry treatment apparatus employing the method for detecting metallic foreign matter of the laundry treatment apparatus according to any one of the above-described first to fourth embodiments.

Further, as shown in fig. 11, the laundry treating apparatus includes a case 4 and a tray 3 disposed on the case 4, a laundry putting opening 301 is disposed on the tray 3, and the metal detecting module 1 includes a transmitting coil 11 and a receiving coil 12 disposed on opposite sides of the laundry putting opening 301.

The transmitting coil 11 and the receiving coil 12 are connected into a controller of the clothes treatment equipment through wires, the controller controls exciting current to inject alternating periodic signals into the transmitting coil 11 through a singlechip, the signals are transmitted into the receiving coil 12 in an electromagnetic wave mode to generate induced currents, and the signal controller collects the change condition of the induced electromotive force of the receiving coil 12 to judge whether metal foreign matters pass through the electromagnetic field.

Further, as shown in fig. 11 and 12, the infrared sensing module includes an infrared transmitting end 21 and an infrared receiving end 22 which are relatively disposed at two opposite sides of the clothes putting opening 301, the infrared transmitting end 21 outputs a high-frequency voltage signal through the single-chip microcomputer, if the clothes are blocked, the infrared receiving end 22 cannot receive the high-frequency signal, and if the point position is changed from a high level to a low level, it can be determined that an object passes through the clothes putting opening 301.

Preferably, as shown in fig. 11 and 12, the transmitting coil 11 and the receiving coil 12 are located at the same horizontal plane, and the two coils are installed in the tray 3 of the clothes treating apparatus, and are located at the left and right ends or front and rear ends of the clothes putting opening 301, and aligned with each other in the same horizontal plane, so as to ensure the maximum received electromagnetic field variation. The coil area is set according to the identification precision, the detection frequency and the power, and the coil is as small as possible from the aspects of saving materials and module suitability.

The transmitting coil 11, the receiving coil 12 and the infrared sensing module can be on the same horizontal plane or at a certain distance, adjustment is needed to be achieved through an algorithm, and preferably, the transmitting coil 11 and the receiving coil 12 are located at the same height position as the infrared sensing module. When the metal detection module 1 and the infrared sensing module generate trigger signals at the same time, it can be judged that the put clothes contain metal foreign matters.

In this embodiment, the clothes processing apparatus further includes an alarm device connected to the controller, the alarm device includes a voice alarm module and a display, when it is determined that there are metal foreign matters in the put clothes, the voice alarm module sends out a voice alarm prompt, and the display displays a fault code.

Preferably, in this embodiment, the alarm device further includes an NFC module and an NFC alarm tag, where the NFC module writes alarm information into the NFC alarm tag, records alarm time and metal foreign information, and thus, even if the user does not hear the alarm beside the laundry treatment device for a while, can query the alarm information by identifying the NFC alarm tag.

Further, as shown in fig. 11, the transmitting coil 11 and the receiving coil 12 are of an arc-shaped structure or a bar-shaped structure symmetrically arranged along the radial direction of the laundry putting opening 301.

The clothing treatment facility that this embodiment provided, metal detection module 1 detects the metallic foreign matter in putting in the clothing through adopting the coil of two arcs or strip shapes, compares in traditional a great annular coil, and the coil volume is more small and exquisite convenient, and the adaptation degree is higher, the installation of being convenient for to the cost is lower.

In this embodiment, the transmitting coil 11 and the receiving coil 12 may be configured as an arc structure matching with the shape of the laundry inlet 301, so that the adaptation degree is higher. Alternatively, the transmitting coil 11 and the receiving coil 12 may be provided in a straight strip structure, which is simple in shape and easy to manufacture. Alternatively, the transmitting coil 11 and the receiving coil 12 may be configured as arc structures protruding outwards, and the magnetic field diverges outwards, so that the detection range is wider.

Further, the lengths of the transmitting coil 11 and the receiving coil 12 are set to L, and the diameter of the laundry putting opening 301 is set to D, where l=1/3D. By setting the lengths of the transmitting coil 11 and the receiving coil 12 to be about one third of the diameter of the clothes putting opening 301, the magnetic field of the metal detection module 1 can be ensured to basically cover the whole clothes putting opening 301, and the problems of overlarge volume, inconvenient installation, high cost and the like of the whole metal detection module 1 caused by overlong setting of the transmitting coil 11 and the receiving coil 12 can be avoided.

In addition, in this embodiment, the center of the transmitting coil 11 and the center of the receiving coil 12 are connected with the center of the laundry inlet 301, so as to avoid the phenomenon that the transmitting coil 11 and the receiving coil 12 are disposed at the end side of the laundry inlet 301, and have a deviated position, a smaller detection range, and a detection omission phenomenon.

The clothes treating apparatus according to the embodiment of the invention includes, but is not limited to, a washing machine, a clothes dryer, a clothes protector, a clothes washer, a clothes dryer, and a washing and protecting integrated machine. Preferably, the laundry treatment apparatus according to the embodiment of the present invention is a pulsator washing machine.

The foregoing description is only illustrative of the preferred embodiment of the present invention, and is not to be construed as limiting the invention, but is to be construed as limiting the invention to any and all simple modifications, equivalent variations and adaptations of the embodiments described above, which are within the scope of the invention, may be made by those skilled in the art without departing from the scope of the invention.

Claims

1. The method for detecting the metallic foreign matters of the clothes treatment equipment is characterized in that the clothes treatment equipment comprises a metal detection module and an infrared induction module which are arranged at a clothes putting opening;

2. The method for detecting metallic foreign matter of a laundry treatment apparatus according to claim 1, wherein the method for determining a sloshing tub signal includes:

3. The method for detecting metallic foreign matter of a laundry treatment apparatus according to claim 1 or 2, characterized in that the detection method specifically comprises:

4. A laundry treatment apparatus metallic foreign matter detection method according to any one of claims 1 to 3, further comprising:

if the metal detection module generates a metal trigger signal and the infrared sensing module also generates a trigger signal at the same time or within a set time difference range, alarming is carried out, otherwise, no alarming is carried out;

5. The method of detecting metallic foreign matter of a laundry machine of claim 4, wherein the determining means for generating the metallic trigger signal by the metallic detection module includes:

it may be determined that a metal trigger signal is generated.

6. The method for detecting metallic foreign matter of a laundry treatment apparatus of claim 5, further comprising the steps of:

7. The method for detecting metallic foreign matter of a laundry treatment apparatus of claim 4, wherein the method for determining that the metallic detection module generates the metallic trigger signal includes the steps of:

8. A laundry treatment apparatus, characterized in that the method for detecting metallic foreign matter of the laundry treatment apparatus according to any one of the above claims 1 to 7 is employed.

9. The laundry treatment apparatus of claim 8, wherein the metal detection module comprises a transmitting coil and a receiving coil disposed on opposite sides of the laundry putting opening;

preferably, the transmitting coil and the receiving coil are positioned on the same horizontal plane and are positioned at the same height as the infrared sensing module.

10. The laundry treatment apparatus according to claim 9, wherein the transmitting coil and the receiving coil are arc-shaped structures or bar-shaped structures symmetrically arranged along a radial direction of the laundry putting-in port;