A clothing processing device and a control method thereof

Abstract

The present invention discloses a clothing processing device and a control method thereof, wherein a metal detection module and an infrared sensing module are respectively arranged at the clothing delivery port of the clothing processing device; the control method comprises: when the control system of the clothing processing device determines that both the metal detection module and the infrared sensing module generate a trigger signal, an alarm is issued, otherwise no alarm is issued. The clothing processing device provided by the present invention uses the above method, and only when it is determined that the trigger signal generated by the metal detection module is caused by the presence of metal foreign matter in the passing clothing, an alarm is issued, and the interference of the internal magnetic field change of the clothing processing device caused by the shaking of the inner drum or the knocking of the outer shell of the clothing processing device on the metal detection is effectively shielded, such as the interference of the internal magnetic field change of the clothing processing device caused by the shaking of the inner drum or the knocking of the outer shell of the clothing processing device on the metal detection is improved, the accuracy of the metal detection module recognition is improved, the phenomenon of false triggering of the alarm is reduced, and the user experience is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of clothing processing, and in particular, relates to a clothing processing device 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. For example, when the user throws heavy clothes or the user performs 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 a magnetic field change, which is easy to trigger the alarm by mistake, seriously affecting the accuracy of the detection coil recognition and reducing 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. By adding an infrared sensing module to the clothing input port to assist the detection of a metal detection module, the interference of changes in the internal magnetic field of the clothing processing device such as shaking of the inner drum and knocking on the outer shell on the metal detection can be effectively shielded, thereby reducing 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 for a clothing processing device, wherein a metal detection module and an infrared sensing module are respectively provided at a clothing inlet of the clothing processing device, and the control method comprises:

[0009] The control system of the clothing processing device generates an alarm when it is determined that both the metal detection module and the infrared sensing module generate trigger signals, and does not generate an alarm otherwise.

[0010] Furthermore, the control system generates an alarm when it is determined that the metal detection module and the infrared sensing module generate trigger signals simultaneously, or generate trigger signals successively within a set time difference range, otherwise no alarm is generated.

[0011] Furthermore, during the operation of the clothing processing device, if it is determined that the metal detection module generates a metal trigger signal, it is further determined whether the infrared sensing module also generates an infrared trigger signal within a set time difference range. If so, an alarm is issued; if not, no alarm is issued.

[0012] Preferably, the time difference range is set to T0 seconds, then within T0 seconds before or after the metal detection module generates a trigger signal,

[0013] If it is determined that the infrared sensing module is also in a triggered state, it can be inferred that the metal detection module is triggered by metal foreign matter in the thrown clothes, and an alarm is issued, otherwise no alarm is issued.

[0014] Furthermore, the method further comprises the following steps:

[0015] Obtain the instantaneous slope value of the metal sensing signal output by the metal detection module in real time, and compare the instantaneous slope value with the set slope threshold;

[0016] When it is determined that the instantaneous slope value of the metal sensing signal is greater than the set slope threshold, it is determined whether the infrared sensing signal is in a trigger state at this time;

[0017] If yes, an alarm is issued; if no, no alarm is issued.

[0018] Furthermore, when it is determined that the metal sensing signal output by the metal detection module exceeds the set dynamic average threshold, the step of acquiring the instantaneous slope value of the output metal sensing signal in real time is started.

[0019] Furthermore, the step of obtaining the instantaneous slope value of the metal sensing signal output by the metal detection module specifically includes the following steps:

[0020] Collect output voltage signals V1, V2, ..., Vn of the metal detection module;

[0021] Draw a detection waveform curve that changes with time t based on the collected output voltage signal;

[0022] When it is determined that the output voltage signal is lower than the set dynamic average threshold, the instantaneous slope value P of the output voltage signal is calculated as ΔV / Δt;

[0023] Preferably, the output voltage signal sampling frequency is T1, ΔV=V n-2 -V n , Δt=2T1, instantaneous slope value P=(V n-2 -V n ) / 2T1;

[0024] Preferably, the instantaneous slope value P is directly taken as ΔV, that is, V n-2 -V n The difference between

[0025] Preferably, the sampling frequency of the output voltage signal is one point every 10-20 ms, that is, 20 ms ≥ T1 ≥ 10 ms.

[0026] Furthermore, the laundry processing device further comprises a vibration detection device for detecting the vibration of the inner barrel, and the control method comprises:

[0027] When it is determined that both the metal detection module and the infrared sensing module generate trigger signals,

[0028] Further determine whether the vibration detection device generates a trigger signal at this time, if yes, then do not alarm; if no, then alarm;

[0029] Preferably, the vibration detection device is an acceleration sensor arranged on the inner barrel.

[0030] Furthermore, the clothing processing device further comprises a voice alarm unit, and the control system controls the voice alarm unit to issue a voice alarm prompt according to the judgment result;

[0031] Preferably, the laundry processing device further comprises a light display unit, and the light display unit at least comprises a warning light and an interference light.

[0032] A second aspect of the present application further provides a clothing processing device, which adopts the control method of the above-mentioned clothing processing device.

[0033] Furthermore, the clothes processing device further comprises a tray seat, and the clothes loading port is arranged in the tray seat;

[0034] The metal detection module and the infrared sensing module are arranged at the same height position in the tray seat.

[0035] Furthermore, an annular mounting groove for mounting the metal detection module is provided in the disc seat;

[0036] The infrared sensing module comprises an infrared transmitting module and an infrared receiving module which are symmetrically arranged in the annular mounting groove along the radial direction of the clothing delivery port.

[0037] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art.

[0038] 1. The control method of the clothing processing device provided by the present invention assists the metal detection module in detection by adding an infrared sensing module to the clothing delivery port. When the metal detection module generates a trigger signal, the infrared sensing module is used to determine whether there is clothing passing through at this time. Only when both the metal detection module and the infrared sensing module generate trigger signals and it is determined that the trigger signal generated by the metal detection module is caused by metal foreign matter in the passing clothing, an alarm will be issued. This method can effectively shield the interference of the internal magnetic field change of the clothing processing device caused by the shaking of the inner drum or the knocking on the outer shell of the clothing processing device on the metal detection, improve the accuracy of the metal detection module's recognition, reduce the phenomenon of false triggering of alarms, and enhance the user experience.

[0039] 2. The clothing processing device provided by the present invention also includes a vibration detection device for detecting the vibration of the inner barrel. When both the metal detection module and the infrared sensing module generate trigger signals, it is further determined whether the vibration detection device generates a trigger signal at this time. If the vibration detection device is also in a triggered state, no alarm is issued. The above method is mainly aimed at users who throw multiple pieces of clothes continuously. The clothes thrown in front have hit the bottom of the inner barrel, triggering the metal detection module to generate a sensing signal. However, the clothes behind have just passed through the delivery port, and the infrared sensing module is still at a high level and is also in a triggered state. The false alarm phenomenon caused can effectively shield the interference of extreme phenomena on the metal detection results, and further improve the recognition accuracy of the metal detection module.

[0040] 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

[0041] 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:

[0042] Figure 1It is a schematic diagram of a waveform curve of metal signal, infrared signal and instantaneous slope value changing with time when there is a metal foreign body in the clothes put in the embodiment of the present invention;

[0043] Figure 2 is a flow chart of a first implementation method of a control method for a clothes processing device in an embodiment of the present invention;

[0044] Figure 3 is a comparison diagram of metal sensing signals and infrared signals of different types of interference and metal foreign matter in clothing in an embodiment of the present invention;

[0045] Figure 4 It corresponds to Figure 3 The comparison chart of the instantaneous slope value of the output voltage of the metal detection module;

[0046] Figure 5 is a schematic diagram of changes in metal sensing signals and infrared signals when the inner barrel is shaken in an embodiment of the present invention;

[0047] Figure 6 It corresponds to Figure 3 Schematic diagram of the change in the instantaneous slope value of the output voltage of the metal detection module;

[0048] Figure 7 is a flow chart of a second implementation method of the control method of the clothes processing device in an embodiment of the present invention;

[0049] Figure 8 is a flow chart of a third implementation method of the control method of the laundry processing device in an embodiment of the present invention (the determination of the vibration of the inner drum is added);

[0050] Fig. 9 is a schematic diagram of a waveform curve showing the change of a voltage signal output by a metal detection module over time when there is a metal foreign body in the clothes put in the embodiment of the present invention;

[0051] Fig.10 This is a flow chart of an implementation method of determining the type of metal foreign matter in a clothes processing device according to an embodiment of the present invention;

[0052] Fig.11 is a schematic diagram showing the structural principle of a clothes processing device according to an embodiment of the present invention;

[0053] In the figure: 1. Clothing delivery port; 2. Metal detection module; 31. Infrared transmitting module; 32. Infrared receiving module; 4. Control system.

[0054] 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

[0055] 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.

[0056] 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.

[0057] 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.

[0058] The present invention will be further described in detail below with reference to the embodiments.

[0059] Embodiment 1

[0060] like Figures 1 to 11 As shown, this embodiment discloses a control method for a clothes processing device, wherein a metal detection module and an infrared sensing module are respectively provided at a clothes loading port of the clothes processing device;

[0061] The control method comprises: when the control system of the clothing processing device determines that both the metal detection module and the infrared sensing module generate trigger signals, the control system issues an alarm, otherwise the control system does not issue an alarm.

[0062] The clothing processing device provided by the present invention will only sound an alarm when both the metal detection module and the infrared sensing module generate trigger signals and it is determined that the trigger signal generated by the metal detection module is caused by the presence of metal foreign matter in the passing clothing. This can effectively shield the interference of changes in the internal magnetic field of the clothing processing device on metal detection caused by, for example, shaking of the inner drum or knocking on the outer shell of the clothing processing device, thereby improving the recognition accuracy of the metal detection module, reducing the phenomenon of false alarm triggering, and improving the user experience.

[0063] Furthermore, the control system generates an alarm when it is determined that the metal detection module and the infrared sensing module generate trigger signals simultaneously, or when the control system generates trigger signals successively within a set time difference range, otherwise no alarm is generated.

[0064] Further, in one embodiment, Figure 2 As shown, during the operation of the clothing processing device, if it is determined that the metal detection module generates a metal trigger signal, it is further determined whether the infrared sensing module also generates an infrared trigger signal within the set time difference range. If so, an alarm is issued; if not, no alarm is issued.

[0065] Preferably, the time difference range is set to T0 seconds. If the infrared sensing module is determined to be in a triggered state within T0 seconds before or after the metal detection module generates a trigger signal, it can be inferred that the metal detection module is triggered by metal foreign matter in the clothes, rather than by vibration of the inner barrel, opening and closing of the lid, or knocking on the box, and an alarm is issued.

[0066] In the above scheme, T0 is obtained according to the simulated delivery experiment and the corresponding calculation formula. The size of T0 mainly depends on the gap distance between the metal detection module and the infrared sensing module in the axial direction of the inner barrel. The larger the gap distance between the metal detection module and the infrared sensing module, the larger T0 is, and vice versa.

[0067] Specifically, in one embodiment, if the metal detection module is set at a set height position above the infrared sensing module, then within T0 seconds after the metal detection module generates a trigger signal, if it is determined that the infrared sensing module is also in a triggered state, it can be inferred that the metal detection module is triggered by metal foreign objects in the clothes, and an alarm is issued, otherwise no alarm is issued.

[0068] In another embodiment, if the infrared sensing module is set at a set height position above the metal detection module, then within T0 seconds before the metal detection module generates a trigger signal, if it is determined that the infrared sensing module is also in a triggered state, it can be inferred that the metal detection module is triggered by metal foreign objects in the clothes, and an alarm is issued, otherwise no alarm is issued.

[0069] In another embodiment, if the infrared sensing module and the metal detection module are arranged at the same height position in the clothing delivery port, the control system will only sound an alarm when it is determined that both the metal detection module and the infrared sensing module generate trigger signals at the same time. In order to improve the detection efficiency of metal foreign bodies, preferably, the infrared sensing module and the metal detection module in this embodiment are arranged at the same height position.

[0070] In this embodiment, when the metal detection module generates a sensing signal, it is determined whether the infrared sensing module generates an infrared trigger signal at this time. Whether the infrared signal of the infrared sensing module is blocked and whether an infrared trigger signal is generated is determined to determine whether there are clothes passing through the clothing delivery port at this time. If it is determined that clothes are passing through, it can be inferred that the metal detection module generates the sensing signal due to metal foreign matter in the clothes delivered, and an alarm is issued. Otherwise, no alarm is issued, thereby effectively avoiding the phenomenon of misjudgment of the metal detection module caused by vibration of the inner barrel and other reasons.

[0071] Alternatively, in another embodiment, the infrared sensing module is used to record the time of placing the clothes, and it is determined whether the detection signal of the metal detection module changes during the time of placing the clothes. If the metal detection module generates a metal trigger signal, an alarm is issued; if the metal detection module generates a metal trigger signal during a time period other than the time period of placing the clothes, no alarm is issued.

[0072] The present application detects the process of putting clothes into the clothes processing device through an infrared sensing module installed at the clothes feeding port in the tray seat of the clothes processing device, and at the same time, the metal detection module detects in real time whether there is a metal foreign body passing through the clothes feeding port. If the two trigger signals occur at the same time or before and after within the set time difference range, it means that there is indeed a metal foreign body entering the inner barrel of the clothes processing device, rather than an interference signal caused by knocking on the body or shaking the inner barrel.

[0073] Furthermore, combined with Figure 1 , Figure 3 , Figure 4 , Figure 7 and Fig.11 As shown, the control method of the clothes processing device provided in this embodiment further includes the following steps:

[0074] Acquire the instantaneous slope value P of the metal sensing signal output by the metal detection module in real time, and compare the instantaneous slope value P with the set slope threshold value P0;

[0075] When it is determined that the instantaneous slope value P of the metal sensing signal is greater than the set slope threshold value P0, it is determined whether the infrared sensing signal is in a trigger state at this time;

[0076] If yes, an alarm is issued; if no, no alarm is issued.

[0077] In the above scheme, by using the instantaneous slope value of the metal sensing signal output by the metal detection module as a basis for determining whether a metal trigger signal is generated, the recognition rate of the metal detection module for small metal objects can be effectively improved, and the metal recognition rate is higher.

[0078] Combination Figures 3 to 6As shown in the figure, when it is determined that the instantaneous slope value of the metal sensing signal is greater than the set slope threshold, the metal detection module is in a triggered state. The triggering of the metal detection module may be caused by metal foreign objects in the clothes put in, or by internal interference such as vibration of the inner drum. Then, by further judging whether the infrared sensing signal of the infrared sensing module is blocked at this time, it is judged whether there are clothes passing through the clothes putting port at this time, and it is inferred whether the metal detection module is triggered by metal foreign objects in the clothes put in. If so, the status flag is 3, and the clothes processing device alarms; if it is caused by shaking of the inner drum, etc., such as Figure 5 As shown in , the status flag is 2, and the clothing processing device does not alarm.

[0079] It should be noted that Figure 3 , Figure 5 The different numbers in the flag position shown in represent different states of the clothing processing device, where the flag position is 1 or close to 1, indicating that the clothing is put in normally; the flag position is 2 or close to 2, indicating that the output voltage is greater than the dynamic average threshold and the instantaneous slope value is greater than the set slope threshold; the flag position is 3 or close to 3, indicating that the metal detection module and the infrared sensing module generate trigger signals at the same time. When the infrared signal is 1, it means that the infrared sensing module is in a triggered state and clothing passes through the clothing delivery port; when the infrared signal is 0, it means that the infrared sensing module is not triggered and no clothing passes through the clothing delivery port.

[0080] Furthermore, combined with Figure 1 , Figure 3 , Figure 4 As shown, when it is determined that the metal sensing signal output by the metal detection module exceeds the set dynamic average threshold, the step of obtaining the instantaneous slope value of the output metal sensing signal in real time is started. In this embodiment, when the metal sensing signal exceeds the set dynamic average threshold, the step of determining whether the metal detection module generates a trigger signal is executed. When the metal sensing signal of the metal detection module generates a slight fluctuation, the instantaneous slope value of the metal sensing signal and the set slope threshold will not be determined, thereby reducing the phenomenon of fearless resource waste and making the entire judgment process more simplified and rational.

[0081] Preferably, if Figure 3-Figure 7 As shown, the metal sensing signal in this embodiment is a voltage signal. When it is determined that the voltage signal output by the metal detection module is lower than the set dynamic average threshold value V0, the instantaneous slope value of the voltage signal and the set voltage slope threshold are determined. When it is determined that the instantaneous slope value of the voltage signal is greater than the set voltage slope threshold, it is inferred that the metal detection module generates a metal trigger signal, and it is determined whether the infrared signal is in a triggered state at this time.

[0082] The dynamic average threshold V0 in the above scheme is calculated as follows:

[0083] V0=V mean -R, R=5mV, K=100 points.

[0084] In this embodiment, the metal detection module generates a trigger signal based on whether the instantaneous slope value of the metal sensing signal is greater than the set slope threshold; the infrared sensing module generates a trigger signal based on whether the infrared signal is in a blocked state. Fig.11 As shown, the infrared sensing module includes an infrared transmitting module 31 and an infrared receiving module 32 which are symmetrically arranged at the clothing loading port 1 along the radial direction of the clothing loading port. If the infrared receiving module 32 does not receive the infrared signal emitted by the infrared transmitting module 31, it is inferred that the infrared sensing module is in a triggered state and clothing passes through the clothing loading port 1.

[0085] Furthermore, combined with Figure 7 As shown, the method of obtaining the instantaneous slope value of the metal sensing signal output by the metal detection module specifically includes the following steps:

[0086] Collect output voltage signals V1, V2, ..., Vn of the metal detection module;

[0087] Draw a detection waveform curve that changes with time t based on the collected output voltage signal;

[0088] When it is determined that the output voltage signal is lower than the set dynamic average threshold, the instantaneous slope value P of the output voltage signal is calculated as ΔV / Δt;

[0089] Preferably, the output voltage signal sampling frequency is T1, ΔV=V n-2 -V n , Δt=2T1, instantaneous slope value P=(V n-2 -V n ) / 2T1. The instantaneous slope value is the output voltage signal V of the first two points. n-2 With V n The calculation and analysis show that the instantaneous slope value is not limited to the output voltage signals of the first two points, but can also be calculated by taking the output voltage signals of the first three points or the first four points.

[0090] Or, to put it another way, when it is determined that the output voltage signal is lower than the set dynamic average threshold, the derivative of the output voltage signal at each point of the detection waveform curve is obtained. When it is determined that the derivative is greater than the set threshold, it can be determined that the metal detection module generates a trigger signal, and it can be determined whether the infrared sensing module is in a triggered state at this time.

[0091] Preferably, in this embodiment, the instantaneous slope value P is directly taken as ΔV, that is, Vn-2 -V n The difference between the instantaneous slope value and the instantaneous slope value can be used to determine whether the metal detection module generates a trigger signal, that is, the instantaneous drop value of the voltage signal can be used to determine whether the metal detection module generates a trigger signal, which can achieve the same effect as the instantaneous slope value and can also simplify the determination steps.

[0092] Preferably, combined Figures 3 to 6 As shown, the sampling frequency of the output voltage signal is one point every 10 to 20 ms, that is, 20 ms ≥ T1 ≥ 10 ms.

[0093] The present application uses the time overlap width method to calculate the slope value when it is determined that the output voltage signal of the metal detection module drops below the dynamic average threshold. When the instantaneous slope value of the output voltage signal reaches the set slope threshold, it is determined whether the infrared sensor signal appears at a high level. If so, an alarm is issued. If the infrared trigger signal appears too early or too late, there will be no foreign object alarm, so as to shield the internal interference to the metal detection caused by shaking of the inner barrel, knocking on the disc seat or knocking on the box body.

[0094] In another preferred embodiment, in combination Figure 8 As shown, the clothes processing device provided in this embodiment further includes a vibration detection device for detecting the vibration of the inner barrel, and the control method includes:

[0095] When it is determined that both the metal detection module and the infrared sensing module generate trigger signals,

[0096] It is further determined whether the vibration detection device generates a trigger signal at this time. If so, no alarm is issued; if not, an alarm is issued.

[0097] In the above scheme, the trigger signal is the vibration of the inner barrel, and the vibration amplitude of the inner barrel is greater than the set threshold. When both the metal detection module and the infrared sensing module generate trigger signals, it is further determined whether the vibration detection device generates a trigger signal at this time. If the vibration detection device is also in the trigger state, no alarm is issued.

[0098] The above method is mainly aimed at the situation where users throw multiple pieces of clothes continuously. The clothes thrown in front have hit the bottom of the inner barrel, triggering the metal detection module to generate a sensing signal. However, the clothes behind have just passed through the delivery port, and the infrared sensing module is still at a high level and is also in a triggered state. The false alarm phenomenon caused can effectively shield the interference of extreme phenomena on the metal detection results, and further improve the recognition accuracy of the metal detection module.

[0099] Preferably, the vibration detection device is an acceleration sensor arranged on the inner barrel, and the acceleration sensor is installed on the inner barrel of the clothing processing device to measure whether the inner barrel vibrates or shifts in position. Since the inner barrel is a large metal part, its movement or vibration will generate an induced current in the coil, affecting the coil's detection of metal objects. When the user throws clothes, the impact of the clothes on the inner barrel will generate vibrations, which are detected by the acceleration sensor. If the user throws multiple pieces of clothes continuously, and there are metal objects in the clothes thrown in front of the user, during the entire throwing process, the coil first detects that the metal object passes through, and the metal signal changes downward. At this time, the infrared signal is blocked, and the infrared signal will also appear in a high-level state. The clothes thrown in front begin to hit the inner barrel, and the metal signal changes downward again. At the same time, the acceleration sensor signal appears. The clothes behind have just passed through the clothing delivery port, and the infrared signal is still high. At this time, if there is no acceleration sensor, false triggering will occur.

[0100] Furthermore, the clothing processing device further comprises a voice alarm unit, and the control system controls the voice alarm unit to issue a voice alarm prompt according to the judgment result.

[0101] Specifically, when it is determined that both the metal detection module and the infrared sensing module generate trigger signals, the voice alarm unit is controlled to issue a relevant voice alarm prompt to remind the user to remove the metal foreign body in the clothes in time. When it is determined that the metal detection module generates a trigger signal and the infrared sensing module does not generate a trigger signal, no alarm reminder is issued to eliminate interference to metal detection such as shaking of the inner barrel, knocking on the box or knocking on the tray seat.

[0102] Alternatively, in another more preferred solution, when it is determined that the metal detection module, infrared sensing module, and vibration detection device all generate trigger signals, no alarm reminder is issued, thereby eliminating the interference of the inner barrel shaking caused by continuous throwing of heavy clothes on the metal detection, further reducing the probability of false alarms.

[0103] Preferably, the laundry processing device further comprises a light display unit, and the light display unit at least comprises a warning light and an interference light.

[0104] When the clothing processing device determines that the metal detection module generates a metal trigger signal due to metal foreign matter in the put clothing, the alarm light is controlled to light up, preferably, the alarm light is controlled to flash quickly to prompt the user.

[0105] When the clothing processing device determines that the metal trigger signal generated by the metal detection module is caused by internal interference such as shaking of the inner barrel or knocking on the box body, the interference light is controlled to light up to prompt the user.

[0106] The present application is a metal detection method based on the principles of electromagnetic induction and eddy current effect, which superimposes infrared sensor signals to determine whether clothing has passed through the plate of the clothing processing device, and utilizes a two-dimensional time overlap width method to realize the determination of metal foreign bodies and prevent interference and false triggering.

[0107] Combination Fig.11 As shown, this embodiment also provides a clothes processing device, which adopts the control method of the clothes processing device mentioned above.

[0108] Furthermore, the clothing processing device also includes a box body and a tray seat arranged on the top of the box body, and the clothing delivery port 1 is arranged in the tray seat for users to put in or take out clothing. In the present application, the metal detection module 2 and the infrared sensing module are arranged at the same height position in the tray seat to further ensure the synchronization of the detection of the two and improve the recognition rate.

[0109] Furthermore, an annular mounting groove for mounting the metal detection module 2 is provided in the disc base; the metal detection module includes an annular probe with a metal detection coil therein, and the annular probe can be detachably fixed in the annular mounting groove by means of screws or snaps.

[0110] The infrared sensing module includes an infrared transmitting module 31 and an infrared receiving module 32 symmetrically arranged in the annular mounting groove along the radial direction of the clothing delivery port 1. The infrared transmitting module 31 and the infrared receiving module 32 are installed on the same horizontal plane as the metal detection coil to ensure time synchronization.

[0111] The metal detection module 2, the infrared transmitting module 31 and the infrared receiving module 32 are all connected to the control system 4 of the clothing processing device to realize signal transmission and control between the clothing processing device.

[0112] Preferably, in this embodiment, the annular mounting groove is located in the disc seat away from the inner barrel side, so that the metal detection coil is as far away from the inner barrel as possible, leaving enough falling height to distinguish between metal signals and signals that impact the inner barrel.

[0113] In this embodiment, the clothing processing device may be a pulsator washing machine, a drum washing machine, a washer-dryer or a dryer or other clothing processing equipment.

[0114] Embodiment 2

[0115] like Fig. 9 and Fig.10 As shown, this embodiment provides a control method for a clothes processing device based on the first embodiment, and its main purpose is to solve the problem that the existing clothes processing device with metal detection function cannot accurately determine the type of metal foreign matter.

[0116] The present embodiment provides a control method for a clothes processing device, and when it is determined that both the metal detection module and the infrared sensing module generate trigger signals, the following steps are further performed:

[0117] Based on the voltage signal output by the metal detection module, a detection waveform curve of t changing with time is drawn, data features of the detection waveform curve are extracted, and the type of metal foreign matter is determined based on the data feature analysis.

[0118] This embodiment analyzes and determines the type of metal foreign matter based on the data features of the extracted measurement waveform curve. The control system of the clothing processing device can accurately determine the type of metal foreign matter and remind the user of the type of metal foreign matter, thereby improving the intelligence level of the clothing processing device, enhancing the human-computer interaction capability, and enhancing the user's experience.

[0119] Furthermore, combined with Fig. 9 , Fig.11 As shown, the control method further includes the following steps:

[0120] Extract the peak voltage Vb when the detection waveform curve drops to the lowest point b, and calculate the drop value of the voltage signal at point b ΔVb = V0-Vb;

[0121] The drop value ΔVb 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.

[0122] In the above solution, V0 is the set dynamic average threshold described in the first embodiment.

[0123] As shown in Table 1 below, in one embodiment, the preset first determination data includes a first preset parameter threshold. The drop value ΔVb 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 judgment result.

[0124] ΔV Item judgment ≤X1 Item 1 ＞X1 Item 2

[0125] Table 1

[0126] 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 ΔVb of the extracted voltage signal is located. 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.

[0127] Furthermore, the control method provided in this embodiment also includes: setting the point where the falling edge of the detection waveform reaches the set voltage threshold V0 as point a, obtaining the slope K of point ab ab ;

[0128] The drop value ΔVb of the voltage signal at point b is respectively compared with the preset first determination data and the slope K ab 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.

[0129] 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 ΔVb of the voltage signal and the first preset parameter threshold value X1, the slope K ab 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.

[0130]

[0131] Table 2

[0132] 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 ab 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.

[0133] Of course, in this embodiment, it is not limited to only the drop value ΔVb and the slope K of the voltage signal. ab These two data features can be used to determine the type of metal foreign matter, such as T bc , data characteristic ratio Q = ΔVb / T bc And other data features to determine the type of metal foreign matter.

[0134] 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 inlet of the clothing processing device is provided with a metal detection module and an infrared sensing module respectively; the clothing processing device also includes a vibration detection device for detecting the vibration of the inner barrel; The control method comprises: when the control system of the clothing processing device determines that both the metal detection module and the infrared sensing module generate trigger signals, further determining whether the vibration detection device generates a trigger signal at this time, and if so, no alarm is issued; if not, an alarm is issued; the trigger signal generated by the vibration detection device is that the inner barrel generates vibration, and the vibration amplitude of the inner barrel is greater than a set threshold; The control system of the clothing processing device does not issue an alarm when it is determined that either the metal detection module or the infrared sensing module generates no trigger signal, or both generate no trigger signal.

2. The control method of the clothes processing device according to claim 1, characterized in that: When the control system determines that the metal detection module and the infrared sensing module generate trigger signals simultaneously, or generate trigger signals successively within a set time difference range, it further determines whether the vibration detection device generates a trigger signal at this time, otherwise no alarm is issued.

3. The control method of the clothes processing device according to claim 1, characterized in that: During the operation of the clothing processing device, if it is determined that the metal detection module generates a metal trigger signal, It is further determined whether the infrared sensing module also generates an infrared trigger signal within the set time difference range. If so, it is further determined whether the vibration detection device generates a trigger signal at this time; if not, no alarm is issued.

4. The control method of the clothes processing device according to claim 3, characterized in that: The time difference range is set to T0 seconds, then within T0 seconds before or after the metal detection module generates a trigger signal, If it is determined that the infrared sensing module is also in the trigger state, it is further determined whether the vibration detection device generates a trigger signal at this time, otherwise no alarm is issued.

5. The control method of the clothes processing device according to any one of claims 1 to 4, characterized in that: The following steps are also included: Obtain the instantaneous slope value of the metal sensing signal output by the metal detection module in real time, and compare the instantaneous slope value with the set slope threshold; When it is determined that the instantaneous slope value of the metal sensing signal is greater than the set slope threshold, it is determined whether the infrared sensing signal is in a trigger state at this time; If yes, it is further determined whether the vibration detection device generates a trigger signal at this time; if no, no alarm is issued.

6. The control method of the clothes processing device according to claim 5, characterized in that: When it is determined that the metal sensing signal output by the metal detection module exceeds the set dynamic average threshold, the step of acquiring the instantaneous slope value of the output metal sensing signal in real time is started.

7. The control method of the clothes processing device according to claim 5, characterized in that: The step of obtaining the instantaneous slope value of the metal sensing signal output by the metal detection module specifically includes the following steps: Collect output voltage signals V1, V2, ..., Vn of the metal detection module; Draw a detection waveform curve that changes with time t based on the collected output voltage signal; When it is determined that the output voltage signal is lower than the set dynamic average threshold, the instantaneous slope value P=ΔV / Δt of the output voltage signal is calculated.

8. The control method of the clothes processing device according to claim 7, characterized in that: The output voltage signal sampling frequency is T1, ΔV=V n-2 -V n , Δt=2T1, instantaneous slope value P=(V n-2 -V n ) / 2T1.

9. The control method of the clothes processing device according to claim 8, characterized in that: The instantaneous slope value P is directly taken as ΔV, that is, V n-2 -V n The difference.

10. The control method of the clothes processing device according to claim 8, characterized in that: The sampling frequency of the output voltage signal is one point every 10-20 ms, that is, 20 ms ≥ T1 ≥ 10 ms.

11. The control method of a clothes processing device according to any one of claims 1 to 4, characterized in that: The vibration detection device is an acceleration sensor arranged on the inner barrel.

12. The control method of a clothes processing device according to any one of claims 1 to 4, characterized in that: The clothing processing device further comprises a voice alarm unit, and the control system controls the voice alarm unit to issue a voice alarm prompt according to the judgment result.

13. The control method of the clothes processing device according to claim 12, characterized in that: The laundry processing device further comprises a light display unit, and the light display unit at least comprises a warning light and an interference light.

14. A clothes processing device, characterized in that: A control method for a clothes processing device according to any one of claims 1 to 13 is adopted.

15. The clothes treating device according to claim 14, characterized in that: The clothes processing device further comprises a tray seat, and the clothes loading port is arranged in the tray seat; The metal detection module and the infrared sensing module are arranged at the same height position in the tray seat.

16. The clothes treating device according to claim 15, characterized in that: The disc seat is provided with an annular mounting groove for mounting the metal detection module; The infrared sensing module comprises an infrared transmitting module and an infrared receiving module which are symmetrically arranged in the annular mounting groove along the radial direction of the clothing delivery port.

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