A garment processing device and its control method

Abstract

The present invention discloses a clothing processing device and a control method thereof, wherein the clothing processing device comprises a metal detection device, wherein the metal detection device comprises a first probe and a second probe sequentially arranged at a clothing delivery port; the control method comprises: when it is determined that the induction signal of the metal detection device meets a preset alarm condition, an alarm reminder is issued; the preset alarm condition at least comprises that the time t1 when the first probe detects the fluctuation signal is earlier than the time t2 when the second probe detects the fluctuation signal. By adopting the above control method, the present invention can effectively shield the electromagnetic interference generated by the metal inner drum, metal outer shell and other metal electrical components of the clothing processing device to the metal detection device, improve the recognition accuracy of the metal detection device, reduce the phenomenon of false alarm triggering, and enhance the user experience.

Description

Technical Field

[0001] The present invention belongs to the technical field of clothing processing, and in particular, relates to a clothing processing device with a metal detection function and a control method thereof. Background Art

[0002] As people's living standards continue to improve, washing machines have gradually become one of the essential home appliances in people's homes. Most people use washing machines as their main tool for washing clothes. Due to the fast pace of life, people often forget to check their clothes pockets when washing clothes, and clothes pockets often contain metal foreign objects such as coins, keys, metal ornaments, mobile phones, and headphones.

[0003] Because the clothes are constantly stirred repeatedly during the washing process, these metal foreign objects are likely to fall out of the pockets of the clothes and directly come into contact with the inner drum of the washing machine, causing wear and tear of the inner drum and the clothes. In addition, smaller foreign objects such as coins, keys, and metal ornaments can easily get stuck in the gaps in the inner drum, which may cause problems such as jamming of the inner drum and overloading of the motor, causing serious damage or even destruction to the washing machine. In addition, electronic products such as mobile phones and headphones cannot be used after being soaked in water, which may also cause property loss to users.

[0004] Patent application number 201721626521.3 discloses a washing machine with a metal detection function. A dehydration barrel is installed in the center of the machine body, and a detection coil is fixedly installed on the outside of the dehydration barrel. When a metal object enters the detection coil, the signal values ​​at both ends of the coil change. This changed signal is processed by the metal detector circuit board, causing the alarm to sound and the indicator light to light up, indicating that there is a metal object.

[0005] Although the washing machine disclosed in the above application can detect whether there is metal in the clothes put in, due to the strong magnetic field environment of the washing machine itself, the washing machine's dehydration barrel, shell, solenoid valve, display panel and other metal electrical components will interfere with the detection coil. When users throw heavy clothes or users carry out indoor construction, the dehydration barrel will shake, and the shaking of the dehydration barrel will cause the detection coil installed on the outside of the dehydration barrel to produce magnetic field changes, which is easy to trigger the alarm by mistake, reducing the accuracy of the detection coil recognition and affecting the user's experience.

[0006] In view of this, the present invention is proposed. Summary of the invention

[0007] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a control method for a clothing processing device, which can effectively shield the interference of changes in the internal magnetic field of the clothing processing device, such as shaking of the inner drum and knocking of the outer shell, on metal detection, and reduce the phenomenon of false triggering of alarms.

[0008] In order to solve the above technical problems, the first aspect of the present application discloses a control method of a clothing processing device, wherein the clothing processing device comprises a metal detection device, wherein the metal detection device comprises a first probe and a second probe which are sequentially arranged at a clothing loading port;

[0009] The control method comprises: when it is determined that the sensing signal of the metal detection device meets the preset alarm condition, an alarm reminder is issued;

[0010] The preset alarm condition at least includes that the time t1 at which the first probe detects the fluctuation signal is earlier than the time t2 at which the second probe detects the fluctuation signal.

[0011] Furthermore, when both the first probe and the second probe detect a fluctuation signal,

[0012] If it is determined that time t1 is earlier than time t2, it can be inferred that there is a metal foreign body in the clothes put in, and the alarm device is controlled to alarm to remind the user; if it is determined that time t1 is later than time t2, no alarm is issued.

[0013] Furthermore, the first probe and the second probe are arranged at intervals at the clothing loading port along the central axis direction of the inner drum;

[0014] During the process of putting in clothes, if it is determined that time t1 is earlier than time t2, then the time difference Δt between the first probe and the second probe detecting the fluctuation signal is further obtained, where Δt=t2-t1;

[0015] And determine whether the Δt is within the set time range Δt', if so, an alarm is issued; if not, no alarm is issued.

[0016] Furthermore, the method for obtaining the set time range Δt' includes:

[0017] According to multiple simulated delivery experiments, the maximum time difference Δt between the first probe and the second probe when the user delivers the clothes from different heights from the clothing delivery port is obtained. max and the minimum time difference Δt min , where: Δt max ≥Δt'≥Δt min .

[0018] Furthermore, the preset alarm condition also includes whether the initial vibration direction of the fluctuation signal detected by the first probe and the second probe is a preset direction;

[0019] Preferably, when it is determined that the time t1 is earlier than the time t2, and the initial vibration directions of the fluctuation signal detected by the first probe and the second probe are both the first preset directions, an alarm is given, otherwise no alarm is given;

[0020] More preferably, the first preset direction is descending first.

[0021] Furthermore, the method further comprises the following steps:

[0022] The induced voltage signal v1 output by the first probe and the induced voltage signal v2 output by the second probe are collected in real time, and vibration waveform curves of v1 and v2 respectively changing with time are plotted;

[0023] The time when v1 reaches the set voltage threshold V0 is taken as t1, and the time when v2 reaches the set voltage threshold V0 is taken as t2;

[0024] The control system of the clothes processing device analyzes and infers the cause of the signal fluctuation generated by the metal detection device at least according to the sequence of the times t1 and t2, and controls whether to alarm according to the analysis result.

[0025] Furthermore, the method further includes the following steps: a control system of the clothing processing device acquires sensing signals of the first probe and the second probe in real time;

[0026] The acquired sensing signal is subjected to gain amplification processing, and a determination is made based on the amplified signal whether the preset alarm condition is met.

[0027] Furthermore, it also includes:

[0028] Based on the induced voltage signal output by the first probe and the induced voltage signal output by the second probe, respectively draw a first vibration waveform curve and a second vibration waveform curve that change with time;

[0029] Data features of the first vibration waveform curve and / or the second vibration waveform curve are extracted, and the type of the metal foreign matter is determined based on the data feature analysis.

[0030] Further, the time Ta when the second vibration waveform curve drops to the lowest point a is obtained;

[0031] Extract the peak voltage Vb when the first vibration waveform curve drops to the lowest point b before time Ta, and calculate the drop value ΔV=V0-Vb of the voltage signal at point b;

[0032] The drop value ΔV of the voltage signal is compared and analyzed with the preset first determination data, and the type of the metal foreign matter is determined according to the analysis result.

[0033] Furthermore, it also includes: setting the point where the falling edge of the first vibration waveform reaches the set voltage threshold V0 as point c, and obtaining the slope K of point bc bc ;

[0034] The drop value ΔV of the voltage signal at point b is respectively compared with the preset first judgment data and the slope K bcThe result of the comparison and analysis is performed with the preset second determination data, and the type of the metal foreign matter is determined according to the analysis result.

[0035] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art.

[0036] 1. The clothing processing device provided by the present invention is provided with a first probe and a second probe in sequence at the clothing delivery port. An alarm is triggered only when it is determined that the time t1 at which the first probe detects a fluctuation signal is earlier than the time t2 at which the second probe detects a fluctuation signal. Otherwise, no alarm is triggered. By adopting the above method, the electromagnetic interference generated by the metal inner cylinder, metal outer shell and other metal electrical components of the clothing processing device to the metal detection device can be effectively shielded, the recognition accuracy of the metal detection device can be improved, the phenomenon of false alarm triggering can be reduced, and the user experience can be improved.

[0037] 2. The present invention obtains the maximum time difference Δt between the first probe and the second probe when the user puts the clothes at different heights from the clothes delivery port according to the simulated delivery experiment. max and the minimum time difference Δt min , when it is determined that the time difference between the first probe and the second probe detecting the fluctuation signal is within the Δt min ~Δt max By adopting the above method, it is possible to effectively avoid the problem of false alarms of the clothing processing equipment caused by metal accessories such as rings, bracelets, watches, etc. on the hands passing through the metal detection device when the user puts the clothes in, or when taking the clothes, the user puts the hands in the clothes inlet, and ...

[0038] 3. The present invention can also analyze and determine the type of metal foreign matter based on the data features of the extracted first vibration waveform curve of the first probe and the second vibration waveform curve of the second probe. The control system of the clothing processing equipment can accurately determine the type of metal foreign matter and remind the user, thereby improving the intelligence level of the clothing processing equipment, enhancing the human-computer interaction capability, and enhancing the user experience.

[0039] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings:

[0041] Figure 1 is a structural schematic diagram of a clothes processing device in an embodiment of the present invention;

[0042] Figure 2 Schematic diagram of the detection principle of the metal detection device in an embodiment of the present invention;

[0043] Figure 3 It is a schematic diagram of waveform curves of the first probe and the second probe when there is a metal foreign object in the clothes;

[0044] Figure 4 is a schematic diagram of a fitting curve after gain in an embodiment of the present invention;

[0045] Figure 5 is a schematic diagram of waveform curves of the first probe and the second probe when the inner cylinder shakes in an embodiment of the present invention;

[0046] Figure 6 It is a schematic diagram of the change curve of the metal signal value and slope value of simulating different types of metal objects;

[0047] Figure 7 is a flow chart of an implementation method of a method for controlling a clothes processing device in an embodiment of the present invention;

[0048] Figure 8 is a flow chart of another implementation of a method for controlling a clothes processing device in an embodiment of the present invention;

[0049] Fig. 9 It is a flow chart of an implementation method for determining the type of metal foreign matter in an embodiment of the present invention;

[0050] In the figure: 1. first probe; 2. second probe; 3. inner tube; 4. disc base; 5. box; 6. controller.

[0051] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0052] In order to make the purpose, 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 in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0053] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0054] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] The present invention will be further described in detail below with reference to the embodiments.

[0056] Embodiment 1

[0057] like Figure 1 to Figure 2 As shown, this embodiment discloses a clothes processing device, comprising:

[0058] Control systems;

[0059] A metal detection device, connected to the control system, is used to detect whether there are metal foreign objects in the clothes put in;

[0060] The metal detection device comprises: a first probe 1 and a second probe 2 which are sequentially arranged at a clothing loading port.

[0061] In the above solution, the first probe 1 and the second probe 2 are annular probes arranged at intervals at the clothing loading port along the central axis direction of the inner drum.

[0062] Compared with setting up one probe, the present application can fully utilize the order of detecting the fluctuation signals by the two annular probes at the clothing loading port, infer the reason why the metal detection device generates the induction signal, and effectively shield the interference of the internal magnetic field changes of the clothing processing equipment such as shaking of the inner drum and knocking on the outer shell on the metal detection, thereby reducing the phenomenon of false triggering of alarms.

[0063] Furthermore, the clothes processing device further comprises a box body 5 and a tray base 4 arranged on the top of the box body 5, and a clothes loading port for users to put in or take out clothes is arranged in the tray base 4.

[0064] Along the direction of clothing input, the first probe 1 and the second probe 2 are arranged in a tray 4 of the clothing processing device at a set distance from each other. The first probe 1 and the second probe 2 are both annular structures.

[0065] The first probe 1 includes a first detection coil, and the second probe 2 includes a second detection coil. The clothes are put through the first detection coil and the second detection coil in sequence.

[0066] In this embodiment, the first detection coil and the second detection coil are two annular coils of the same specifications with the same number of coil turns, shape and size. By using two annular coils of the same specifications, the recognition accuracy is further guaranteed.

[0067] Further, the first detection coil and the first detection coil are arranged coaxially with the inner drum 3 of the laundry processing device. The maximum outer diameters of the first detection coil and the first detection coil are equal to the inner diameter of the inner drum 3.

[0068] With the above arrangement, no matter how the inner cylinder 3 shakes left and right, it is in a state of generating a magnetic field. If the shaking of the inner cylinder 3 interferes with the metal detection device, the second detection coil will generate an induction signal earlier than the first detection coil. This helps the control system to shield the interference signal caused by the shaking of the inner cylinder 3, reduce the phenomenon of false alarm triggering, and improve the user experience.

[0069] Furthermore, the clothes processing device provided in this embodiment also includes a mounting structure for mounting the metal detection device, and the mounting structure includes:

[0070] A first mounting structure is arranged in the disc seat 4 away from the inner tube 3 and is used to mount and fix the first probe 1;

[0071] The second mounting structure is arranged in the disc base 4 near the inner tube 3 and is used to install and fix the second probe 2. The second mounting structure is arranged at a set interval distance from the first mounting structure.

[0072] In one embodiment of the above scheme, the first mounting structure is a first annular mounting groove, the second mounting structure is a second annular mounting groove, the first probe 1 is limitedly installed in the first annular mounting groove, and the second probe 2 is limitedly installed in the second annular mounting groove. Through the above installation method, the stability of the first probe 1 and the second probe 2 can be guaranteed, and quick assembly and installation can be achieved.

[0073] Preferably, the first probe 1 and the second probe 2 are fixed in the first annular mounting groove and the second annular mounting groove by screws and / or buckles, further ensuring the stability of the first probe 1 and the second probe 2, and preventing the first probe 1 and the second probe 2 from moving due to vibration of the clothing processing device, thereby affecting the detection effect. At the same time, fixing the first probe 1 and the second probe 2 by screws and / or buckles facilitates disassembly and installation, thereby improving the assembly efficiency of the metal detection device.

[0074] Furthermore, the clothes processing device also includes: an alarm device, which is connected to the control system of the clothes processing device and is used to issue relevant alarm reminders according to the indication signal of the control system.

[0075] Furthermore, the alarm device comprises:

[0076] The voice alarm unit is used to issue relevant voice alarm reminders according to the indication signal of the control system.

[0077] And / or, a display alarm unit, used to display relevant text and / or graphic reminders according to the indication signal of the control system.

[0078] In the above scheme, the voice alarm unit is a buzzer or a voice alarm, and the display alarm unit is a display panel of the clothing processing device. Preferably, the alarm device also includes a metal foreign body indicator light. When it is determined that there is a metal foreign body in the clothes, the clothing processing device can send an alarm reminder to the user through voice, text, light and other methods, so that the user can obtain prompt information about the presence of metal foreign bodies in the clothes in a timely manner.

[0079] In this embodiment, the control system of the clothing processing device will control the alarm device only when it is determined that both the first probe 1 and the second probe 2 have detected metal signals, and the first probe 1 detects the metal signal earlier than the second probe 2, otherwise no alarm will be issued. By adopting the above control method, the electromagnetic interference generated by the metal inner drum 3, metal outer shell and other metal electrical components of the clothing processing device to the metal detection device can be effectively shielded, the accuracy of the metal detection device recognition is improved, the phenomenon of false alarm triggering is reduced, and the user experience is improved.

[0080] Furthermore, the control system includes a controller 6, and the first probe 1 and the second probe 2 are respectively connected to the controller 6 through shielded wires. The first probe 1 and the second probe 2 are composed of a coil with a fixed number of turns wound around an enameled wire with a fixed wire diameter, and the coil is coated with an outer layer of an insulating rubber tube. The butt joint of the coil is connected to the interface of the controller 6 through a shielded wire, so that the detected metal signal is transmitted to the controller 6.

[0081] Furthermore, the clothes processing device further comprises: a backup power supply module connected to the controller 6 and used to independently supply power to the controller 6. In this embodiment, the backup power supply module is a 12V rechargeable battery.

[0082] The backup power supply module can be used to power the metal detection device when the clothing processing equipment is not powered on or turned on. Some users may realize that they forgot to power on the clothing processing equipment after they have put in the clothes. At this time, the backup power supply module can power the controller 6. Even if the clothing processing equipment is not powered on, the metal detection device can still detect whether there are metal foreign objects in the put in clothes, avoid missed detection, and improve user experience.

[0083] Furthermore, the control system comprises:

[0084] An acquisition unit, used to acquire the time when the first probe 1 detects the fluctuation signal and the time when the second probe 2 detects the fluctuation signal;

[0085] A judging unit, used to judge whether the time when the first probe 1 detects the fluctuation signal is earlier than the time when the second probe 2 detects the fluctuation signal;

[0086] The control unit is used to control whether the alarm device of the clothing processing equipment alarms according to the judgment result of the judgment unit.

[0087] In the above scheme, if the judgment unit determines that the time when the first probe 1 detects the fluctuation signal is earlier than the time when the second probe 2 detects the fluctuation signal, the control unit controls the alarm device to alarm, otherwise no alarm is issued, thereby reducing the phenomenon of false triggering of alarms and improving the user experience.

[0088] The clothes processing device in this embodiment may be a pulsator washing machine, a drum washing machine, or a washer-dryer, etc. Preferably, the clothes processing device is a pulsator washing machine.

[0089] Embodiment 2

[0090] This embodiment provides a control method for the above-mentioned clothing processing device based on the first embodiment, which can effectively shield interference to metal detection such as shaking of the inner drum and knocking of the outer shell, and avoid the phenomenon of false triggering of the alarm.

[0091] Combination Figures 1 to 3 as well as Figure 7 As shown, the control method of the clothes processing device provided in this embodiment includes:

[0092] When it is determined that the sensing signal of the metal detection device meets the preset alarm condition, an alarm reminder is issued;

[0093] The preset alarm condition at least includes that the time t1 at which the first probe 1 detects the fluctuation signal is earlier than the time t2 at which the second probe 2 detects the fluctuation signal.

[0094] The clothing processing device provided in this embodiment adopts the above method and will only alarm when it is determined that the time t1 when the first probe 1 detects the fluctuation signal is earlier than the time t2 when the second probe 2 detects the fluctuation signal. Otherwise, no alarm will be given. This can effectively shield the electromagnetic interference generated by the metal inner drum, metal outer shell and other metal electrical components of the clothing processing device to the metal detection device, improve the recognition accuracy of the metal detection device, reduce the phenomenon of false alarm triggering, and enhance the user experience.

[0095] Furthermore, combined with Figures 1 to 3 as well as Figure 7 As shown, if it is determined that both the first probe 1 and the second probe 2 detect the fluctuation signal, and the time t1 when the first probe 1 detects the fluctuation signal is earlier than the time t2 when the second probe 2 detects the fluctuation signal, it can be inferred that there is a metal foreign body in the clothes put in, and an alarm is issued to remind the user. If it is determined that the time t1 when the first probe 1 detects the fluctuation signal is later than the time t2 when the second probe 2 detects the fluctuation signal, it can be inferred that the reason why the metal detection device generates the induction signal is not caused by the presence of a metal foreign body in the clothes put in, and no alarm will be issued, thereby reducing the false alarm rate and improving the user experience.

[0096] Compared with setting a single annular probe, the present application uses the first probe 1 and the second probe 2 to set up at an interval up and down. It can make full use of the order of detecting the fluctuation signals by the two annular probes to determine the reason why the metal detection device generates the induction signal, effectively shield the interference of the internal magnetic field changes of the clothing processing equipment such as shaking of the inner drum and knocking on the outer shell on the metal detection, and reduce the phenomenon of false triggering of alarms.

[0097] like Figures 1 to 3 As shown, when clothes with metal foreign matter are put into the clothes processing device, the signal detected by the first probe 1 and the signal detected by the second probe 2 have a sequence and time difference. The first probe 1 detects the fluctuation signal first, and then the second probe 2 detects it.

[0098] Further, in another preferred embodiment, in combination with Figures 1 to 3 as well as Figure 8 As shown, during the process of putting in clothes, if it is determined that time t1 is earlier than time t2, the time difference Δt between the first probe 1 and the second probe 2 detecting the fluctuation signal is further obtained, where Δt=t2-t1.

[0099] It is further determined whether the Δt is within the set time range Δt'. If so, an alarm is issued; if not, no alarm is issued.

[0100] In the above scheme, by determining that the time difference between the first probe 1 and the second probe 2 detecting the fluctuation signal is within the set time range, an alarm is issued, otherwise no alarm is issued. This can effectively eliminate the phenomenon of extreme situations causing false alarms in the clothing processing equipment, further improve the accuracy of metal detection device recognition, and reduce the probability of false alarms.

[0101] Furthermore, the method for obtaining the set time range Δt' includes:

[0102] Combination Figure 2 and Figure 3 As shown, based on multiple simulated delivery experiments, the maximum time difference Δt between the first probe 1 and the second probe 2 when the user delivers the clothes from different heights from the clothing delivery port is obtained. max and the minimum time difference Δt min , where: Δt max ≥Δt'≥Δt min .

[0103] By adopting the above method, it is possible to effectively avoid the problem of users putting their hands into the clothing insertion port when putting clothes in, or metal accessories such as rings, bracelets, watches on their hands passing through the metal detection device when taking clothes, thereby causing false alarms in the clothing processing equipment. This improves the detection accuracy of the metal detection device and reduces the false alarm rate.

[0104] Specifically, the maximum time difference Δt can be obtained by the following formula: max and the minimum time difference Δt min , and then obtain the set time range Δt'.

[0105] h2=h1+dΔt=t2-t1

[0106] like Figure 2 and Figure 3 As shown, h1, h2 and d are determined values, h2 is the distance between the placed clothes and the second probe 2, h1 is the distance between the placed clothes and the first probe 1, and d is the interval distance between the first probe 1 and the second probe 2.

[0107] Through multiple simulation experiments, according to the above formula, the maximum time difference Δt between the first probe and the second probe when the user puts the clothes at different heights from the clothes delivery port is calculated. max and the minimum time difference Δt min , and obtain the set time range Δt'.

[0108] like Figure 2As shown, the first detection coil and the second detection coil are respectively connected to the controller 6, and the controller 6 converts the voltage signals detected by the first detection coil and the second detection coil into digital signals. In the actual operation of the clothing processing device, when metal foreign matter enters the first detection coil and the second detection coil, the magnetic field will trigger the signal to drop, and then the oscillation will recover the original value. The time difference Δt is obtained by subtracting the timestamps of the trigger signals for analysis. If the time difference exceeds the Δt' range, the alarm will not be triggered, and the alarm will be triggered only within the Δt' range.

[0109] Furthermore, the preset alarm condition also includes whether the initial vibration direction of the fluctuation signal detected by the first probe 1 and the second probe 2 is a preset direction;

[0110] Preferably, when it is determined that the time t1 is earlier than the time t2, and the first probe 1 and the second probe 2 detect that the initial vibration direction of the fluctuation signal is the first preset direction, an alarm is triggered, otherwise no alarm is triggered.

[0111] More preferably, the first preset direction is descending first.

[0112] In this embodiment, the first detection coil and the second detection coil are coaxial with the inner cylinder 3 of the laundry processing device, and the outer diameters of the first detection coil and the second detection coil are equal to the inner diameter of the inner cylinder 3. Figure 5 As shown, the above setting makes the shaking of the inner cylinder produce a magnetic field, which is an upward changing signal. In addition, the second probe 2 first produces a change in signal fluctuation, followed by the change of the first probe 1. Through the above characteristics, the interference of the shaking of the inner cylinder can be shielded.

[0113] Specifically, the controller of the clothing processing equipment performs digital signal processing and analysis on the fluctuation signals detected by the first probe 1 and the second probe 2. If it is determined that the signal rises first and the second probe 2 detects the signal fluctuation earlier than the first probe 1, it can be determined that the inner drum is shaking, and the metal detection device generated by the shaking generates an induction signal, then no alarm is issued, and the interference of the inner drum shaking on the metal detection is shielded.

[0114] The present embodiment provides a clothing processing device, which can not only shield the interference of the shaking of the inner drum to the metal detection, but also shield the interference of knocking on the box body to the metal detection. For example, if a child knocks on the box body mischievously, it will also cause the change of the magnetic field inside the clothing processing device. Since the time when the second probe 2 detects the signal fluctuation when knocking on the outer shell is also earlier than the time when the first probe 1 detects the fluctuation signal, the present application will issue an alarm only when it is determined that the time t1 when the first probe 1 detects the fluctuation signal is earlier than the time t2 when the second probe 2 detects the fluctuation signal, thereby effectively shielding the interference of knocking on the box body.

[0115] The laundry processing device control method provided in this embodiment further includes the following steps:

[0116] The induced voltage signal v1 output by the first probe 1 and the induced voltage signal v2 output by the second probe 2 are collected in real time, and vibration waveform curves of v1 and v2 respectively changing with time are plotted;

[0117] The time when v1 reaches the set voltage threshold V0 is taken as t1, and the time when v2 reaches the set voltage threshold V0 is taken as t2;

[0118] The control system of the clothes processing device analyzes and infers the cause of the signal fluctuation generated by the metal detection device at least according to the sequence of the times t1 and t2, and controls whether to alarm according to the analysis result.

[0119] Specifically, if it is determined that the metal detection device generates signal fluctuations due to metal foreign matter in the clothes, an alarm is issued. If it is determined that the metal detection device generates signal fluctuations due to vibration of the inner drum or knocking on the box, no alarm is issued.

[0120] Furthermore, the following steps are included: the control system of the clothing processing equipment obtains the sensing signals of the first probe 1 and the second probe 2 in real time; performs gain amplification processing on the acquired sensing signals, and determines whether the preset alarm conditions are met based on the gain-amplified signals.

[0121] Specifically, Figure 4 As shown in the figure, the waveform after the signal is triggered is fitted to the curve using the least squares method, and the fitting polynomial formula is: The cycle is From the above, we can know that the time interval between the first detection coil and the second detection coil sensing the signal in the 1 / 4 cycle is Δt, and the period after gain becomes T 增益 =T+4×Δt. The gain ratio can be obtained as Therefore, the fitting curve after gain is:

[0122] When there are tiny metal or non-ferromagnetic metals in the clothes put by the user, such as coins, plastic car keys (containing micro circuit boards), the signal generated is very small, which requires the use of a double-layer coil to achieve a digital gain effect of the signal, which can effectively prevent the metal signal from decaying between the first detection coil and the second detection coil, thereby improving the recognition rate.

[0123] Embodiment 3

[0124] This embodiment provides a method for controlling a clothes processing device based on the first and second embodiments, and its main purpose is to solve the problem that the existing clothes processing devices with metal detection function cannot accurately determine the type of metal foreign matter.

[0125] Combination Figure 2 , Figure 3 , Figure 6 , Fig. 9 As shown, this embodiment provides a method for controlling a clothes processing device, comprising:

[0126] Based on the induced voltage signal output by the first probe 1 and the induced voltage signal output by the second probe 2, a first vibration waveform curve and a second vibration waveform curve varying with time are respectively drawn;

[0127] Data features of the first vibration waveform curve and / or the second vibration waveform curve are extracted, and the type of the metal foreign matter is determined based on the data feature analysis.

[0128] This embodiment analyzes and determines the type of metal foreign matter based on the data features of the extracted first vibration waveform curve of the first probe 1 and the second vibration waveform curve of the second probe 2. The control system of the clothing processing equipment can accurately determine the type of metal foreign matter and remind the user, thereby improving the intelligence level of the clothing processing equipment, enhancing the human-computer interaction capability, and enhancing the user experience.

[0129] Furthermore, combined with Figure 3 , Fig. 9 As shown, the time Ta when the second vibration waveform curve drops to the lowest point a is obtained;

[0130] Extract the peak voltage Vb when the first vibration waveform curve drops to the lowest point b before time Ta, and calculate the drop value ΔV=V0-Vb of the voltage signal at point b;

[0131] The drop value ΔV of the voltage signal is compared and analyzed with the preset first determination data, and the type of the metal foreign matter is determined according to the analysis result.

[0132] Combination Figure 3 , Figure 6 As shown, different metal objects contain different metal components and total amounts, and the induced voltage caused by the coil is different. Based on the peak-to-valley voltage value of the metal signal point b, metal objects with a large metal content can be distinguished, such as mobile phones, car keys, and key chains. The calculation formula is as follows:

[0133]

[0134] ΔV=V0-Vb

[0135] Where K=100, V0 is the arithmetic mean of the first 100 points, preferably removing the two largest values ​​and the two smallest values ​​for deburring. ΔV is the drop value of the metal sensing signal.

[0136] As shown in Table 1 below, in one embodiment, the preset first determination data includes a first preset parameter threshold. The drop value ΔV of the voltage signal is judged and compared with the first preset parameter threshold X1, and the type of the metal object is inferred according to the determination result.

[0137] ΔV Item judgment ≤X1 Item 1 ＞X1 Item 2

[0138] Table 1

[0139] In another embodiment, the preset first determination data includes a first set value interval range, and the type of the metal object is inferred by determining the interval range in which the drop value ΔV of the extracted voltage signal lies. The first set value interval range includes at least two or more value intervals, and different value intervals correspond to different types of metal objects.

[0140] During the process of putting in clothes, if there are metal foreign bodies in the clothes, the metal foreign bodies will cause the voltage signal to drop and produce a fluctuation when passing through the first probe 1. If the clothes put in are heavy, they will hit the inner drum, causing the inner drum to shake, generating electromagnetic interference to the metal detection device, and also causing the voltage signal of the first probe 1 to produce a secondary fluctuation. Therefore, the present application extracts the drop value of the voltage signal when the first vibration waveform curve drops to the lowest point before the Ta time, and judges the type of metal foreign bodies according to the drop value, which can effectively eliminate the interference of the shaking caused by the impact of the bottom of the barrel when putting in heavier clothes on the metal detection device, and improve the accuracy of the judgment of the type of metal foreign bodies.

[0141] Furthermore, the control method provided in this embodiment further includes: setting the point where the falling edge of the first vibration waveform reaches the set voltage threshold V0 as point c, obtaining the slope K of point bc bc ;

[0142] The drop value ΔV of the voltage signal at point b is respectively compared with the preset first judgment data and the slope K bc The result of the comparison and analysis is performed with the preset second determination data, and the type of the metal foreign matter is determined according to the analysis result.

[0143] Specifically, as shown in Table 2 below, in one embodiment, the preset second determination data includes a second preset parameter threshold value, and the magnitude of the drop value ΔV of the voltage signal and the first preset parameter threshold value X1, the slope K bc The value of the metal object is compared with the value of the second preset parameter threshold value Y1, and the type of the metal object is inferred according to the judgment result.

[0144]

[0145] Table 2

[0146] Alternatively, in another embodiment, the preset first determination data includes a first set value interval range, and the preset second determination data includes a second set value interval range, by determining the first set value interval range, K bc The second set numerical interval is used to infer the type of the metal object. The second set numerical interval includes at least two or more numerical intervals. By adopting the interval range judgment method, more metal foreign bodies can be distinguished and judged, and the detection of metal foreign body types is more comprehensive and rich, which can better meet the user's usage needs.

[0147] Of course, in this embodiment, it is not limited to only using the drop value ΔV and the slope K of the voltage signal extracted before the Ta time. bc These two data features can be used to determine the type of metal foreign matter, such as T bc , data characteristic ratio Q = ΔV / T bc And other data features to determine the type of metal foreign matter.

[0148] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. A control method for a clothes processing device, characterized in that: The clothing processing device comprises a metal detection device, wherein the metal detection device comprises a first probe and a second probe which are sequentially arranged at a clothing loading port; The control method comprises: when it is determined that the sensing signal of the metal detection device meets the preset alarm condition, an alarm reminder is issued; The preset alarm condition at least includes that the time t1 at which the first probe detects the fluctuation signal is earlier than the time t2 at which the second probe detects the fluctuation signal; Based on the induced voltage signal output by the first probe and the induced voltage signal output by the second probe, respectively draw a first vibration waveform curve and a second vibration waveform curve that change with time; Data features of the first vibration waveform curve and / or the second vibration waveform curve are extracted, and the type of the metal foreign matter is determined based on the data feature analysis.

2. The control method of the clothes processing device according to claim 1, characterized in that: When both the first probe and the second probe detect fluctuation signals, If it is determined that time t1 is earlier than time t2, it can be inferred that there is a metal foreign body in the clothes put in, and the alarm device is controlled to alarm to remind the user; if it is determined that time t1 is later than time t2, no alarm is issued.

3. The control method of the clothes processing device according to claim 2, characterized in that: The first probe and the second probe are arranged at intervals at the clothing loading port along the central axis direction of the inner drum; During the process of putting in clothes, if it is determined that time t1 is earlier than time t2, then the time difference Δt between the first probe and the second probe detecting the fluctuation signal is further obtained, where Δt=t2-t1; And determine whether the Δt is within the set time range Δt', if so, an alarm is issued; if not, no alarm is issued.

4. The control method of the clothes processing device according to claim 3, characterized in that: The method for obtaining the set time range Δt' includes: According to multiple simulated delivery experiments, the maximum time difference Δt between the first probe and the second probe when the user delivers the clothes from different heights from the clothing delivery port is obtained. max and the minimum time difference Δt min , where: Δt max ≥Δt'≥Δt min .

5. The control method of the clothes processing device according to claim 4, characterized in that: The preset alarm condition also includes whether the initial vibration direction of the fluctuation signal detected by the first probe and the second probe is a preset direction.

6. The control method of the clothes processing device according to claim 5, characterized in that: When it is determined that the time t1 is earlier than the time t2, and the initial vibration directions of the fluctuation signals detected by the first probe and the second probe are both the first preset directions, an alarm is issued, otherwise no alarm is issued.

7. The control method of the clothes processing device according to claim 6, characterized in that: The first preset direction is to descend first.

8. The control method of a clothes processing device according to any one of claims 1 to 7, characterized in that: The following steps are also included: The induced voltage signal v1 output by the first probe and the induced voltage signal v2 output by the second probe are collected in real time, and vibration waveform curves of v1 and v2 respectively changing with time are plotted; The time when v1 reaches the set voltage threshold V0 is taken as t1, and the time when v2 reaches the set voltage threshold V0 is taken as t2; The control system of the clothes processing device analyzes and infers the cause of the signal fluctuation generated by the metal detection device at least according to the sequence of the times t1 and t2, and controls whether to alarm according to the analysis result.

9. The control method of a clothes processing device according to any one of claims 1 to 7, characterized in that: The following steps are also included: The control system of the clothing processing device acquires sensing signals of the first probe and the second probe in real time; The acquired sensing signal is subjected to gain amplification processing, and a determination is made based on the amplified signal whether the preset alarm condition is met.

10. The control method of the clothes processing device according to claim 1, characterized in that: Obtain the time Ta when the second vibration waveform curve drops to the lowest point a; Extract the peak voltage Vb when the first vibration waveform curve drops to the lowest point b before time Ta, and calculate the drop value ΔV=V0-Vb of the voltage signal at point b; The drop value ΔV of the voltage signal is compared and analyzed with the preset first determination data, and the type of the metal foreign matter is determined according to the analysis result.

11. The control method of the clothes processing device according to claim 10, characterized in that: Also includes: Set the point where the falling edge of the first vibration waveform reaches the set voltage threshold V0 as point c, and obtain the slope Kbc of point bc; The drop value ΔV of the voltage signal at point b is compared with the preset first determination data, and the slope K bc is compared with the preset second determination data, and the type of the metal foreign matter is determined according to the analysis results.

12. A clothes processing device, characterized in that: A control method for a clothing processing device according to any one of claims 1 to 11 is adopted.

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