Clothes dryness and wetness detection method, device, clothing care machine and storage medium

Abstract

The embodiments of the present application disclose a method, device, clothing care machine and storage medium for detecting the wet and dry status of clothing. The technical solution provided by the embodiments of the present application determines the number of target echo signals by monitoring the echo signals received by an open ultrasonic transceiver within a preset time period; wherein the target echo signal includes a first echo signal and a second echo signal received for the first time; the duration of the second echo signal is greater than a first threshold; the first echo signal is a second echo signal in the received echo signal, the time difference between the reception time of the first echo signal and the reception time of the previous second echo signal is less than a second threshold; based on the number of target echo signals, the wet and dry status of the clothing corresponding to the open ultrasonic transceiver is determined. By adopting the above technical means, the wet and dry status of the clothing in the corresponding area can be accurately determined based on the number of target echo signals, thereby avoiding the misjudgment of the wet and dry status of the clothing and improving the detection accuracy of the clothing status of the clothing care machine.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of ultrasonic detection technology, and in particular to a method and device for detecting the dryness and wetness status of clothing, a clothing care machine, and a storage medium. Background Art

[0002] When performing clothing care, existing clothing care machines determine the dryness and wetness status of the clothes in the care machine cabinet. When performing care operations such as wrinkle removal, drying, deodorization and sterilization on the clothes, they can adaptively select the running time of the clothing drying program to intelligently adjust to the optimal clothing care effect and improve user experience.

[0003] At present, the way that clothing care machines detect the dryness and wetness status of clothes is: a temperature and humidity sensor is set in the clothing care machine body, the temperature and humidity of the air in the body is detected by the temperature and humidity sensor, and the dryness and wetness status of the clothes in the body is determined according to the air temperature and humidity.

[0004] However, when clothes made of different materials have different humidity, the temperature and humidity of the air in the box are different. Therefore, the accuracy of the dryness and wetness of the clothes determined by the above method is low. Summary of the Invention

[0005] The embodiments of the present application provide a method, device, clothing care machine and storage medium for detecting the dryness and wetness status of clothing, which can improve the accuracy of detecting the dryness and wetness status of clothing and solve the technical problem of low accuracy in detecting the dryness and wetness status of clothing in existing clothing care machines.

[0006] In a first aspect, an embodiment of the present application provides a method for detecting the wet and dry status of clothing, which is applied to a clothing care machine including an open ultrasonic transceiver. Specifically, the method for detecting the wet and dry status of clothing includes: monitoring the echo signal received by the open ultrasonic transceiver within a preset time period (the echo signal is the signal after the ultrasonic signal sent by the open ultrasonic transceiver is reflected by an obstacle); and then determining the number of target echo signals, wherein the target echo signal includes a first echo signal and a second echo signal received for the first time, the duration of the second echo signal is greater than a first threshold, and the first echo signal is a second echo signal in the received echo signal, the time difference between the reception time of the previous second echo signal and the reception time of the previous second echo signal is less than the second threshold; thereafter, according to the number of target echo signals, determining the wet and dry status of the clothing corresponding to the open ultrasonic transceiver.

[0007] As can be seen, the solution provided by the embodiments of this application is based on the different attenuation characteristics of ultrasonic signals for dry and wet clothing. By determining the number of target echo signals among the echo signals received within a preset time period, the wetness and dryness of the clothing in the corresponding area can be determined based on the number of target echo signals. In this way, the different waveform characteristics of the echo signals reflected by clothing in different wet and dry states can be combined to achieve new and accurate detection of the wetness and dryness of clothing, avoid misjudgment of the wetness and dryness of clothing, and improve the detection accuracy of clothing status of clothing care machines.

[0008] Furthermore, since the detection accuracy of the dryness and wetness status of clothes is effectively improved, when performing clothing care in the future, the running time of the clothing care machine (such as the running time of the drying program) can be adaptively adjusted according to the accurately detected dryness and wetness status of clothes, ensuring that the clothing care machine accurately adjusts the running time, avoiding energy waste caused by the clothing care machine running for too long, optimizing the energy efficiency management effect of the clothing care machine, and optimizing the user experience.

[0009] In one possible design, the “determining the number of target echo signals” includes:

[0010] Detect the duration of the received echo signal; determine that a second echo signal with a duration greater than a first threshold is received for the first time at a first moment, and determine that the number of target echo signals is one; starting from the first moment, if the next second echo signal is received within the duration of the second threshold, determine that the number of target echo signals is increased by one; and so on, starting from the moment of receiving the next second echo signal, continue detecting until the preset duration ends.

[0011] In a possible design, the wet / dry state includes a first state and a second state, and the above “determining the wet / dry state of the clothing corresponding to the open ultrasonic transceiver based on the number of target echo signals” includes:

[0012] If the number of target echo signals is greater than the signal number threshold, determining that the clothing is in the first state;

[0013] If the number of the target echo signals is less than the signal number threshold, it is determined that the clothing is in the second state.

[0014] In a possible design, the method for detecting the dryness and wetness of clothing further includes:

[0015] The open ultrasonic transceiver is controlled to send ultrasonic signals, and the start time of the preset duration is the end time of the ultrasonic signal sending.

[0016] In a second aspect, an embodiment of the present application provides a clothing wet and dry status detection device, which is applied to a clothing care machine including an open ultrasonic transceiver. Specifically, the clothing wet and dry status detection device includes: a monitoring module for monitoring the echo signal received by the open ultrasonic transceiver within a preset time length (the echo signal is the signal after the ultrasonic signal sent by the open ultrasonic transceiver is reflected by an obstacle); a signal statistics module for determining the number of target echo signals, wherein the target echo signal includes a first echo signal and a second echo signal received for the first time, the duration of the second echo signal is greater than a first threshold, and the first echo signal is a second echo signal in the received echo signal, the time difference between the reception time of the previous second echo signal and the time of the reception time of the previous second echo signal is less than the second threshold; a status determination module for determining the wet and dry status of the clothing corresponding to the open ultrasonic transceiver based on the number of target echo signals.

[0017] In one possible design, the signal statistics module is specifically used to: detect the duration of the received echo signal; determine that a second echo signal with a duration greater than a first threshold is received for the first time at a first moment, and determine that the number of target echo signals is one; taking the first moment as the starting point, if the next second echo signal is received within the duration of the second threshold, then determine that the number of target echo signals is increased by one; and so on, starting from the moment of receiving the next second echo signal, continue detecting until the preset duration ends.

[0018] In one possible design, the dry and wet state includes a first state and a second state, and the state determination module is specifically used to: if the number of target echo signals is greater than the signal number threshold, determine that the clothes are in the first state; if the number of target echo signals is less than the signal number threshold, determine that the clothes are in the second state.

[0019] In a possible design, the monitoring module is also used to:

[0020] The open ultrasonic transceiver is controlled to send ultrasonic signals, and the start time of the preset duration is the end time of the ultrasonic signal sending.

[0021] In a third aspect, an embodiment of the present application provides a clothing care machine, comprising:

[0022] An open ultrasonic transceiver, a memory and one or more processors, wherein the open ultrasonic transceiver is connected to the processor;

[0023] The memory is used to store computer-executable instructions;

[0024] The processor is used to call the computer execution instructions and control the operation of the open ultrasonic transceiver, so that when the clothing care machine is running, the computer execution instructions are executed to implement the clothing dryness and wetness status detection method as described in the first aspect.

[0025] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium comprising computer instructions. When the computer instructions are executed on a clothing care machine, the clothing care machine executes the clothing dryness and wetness status detection method as described in the first aspect.

[0026] In a fifth aspect, an embodiment of the present application provides a computer program product, which includes computer instructions. When the computer instructions are run on a clothing care machine, the clothing care machine executes the clothing dryness and wetness status detection method as described in the first aspect and any possible design method thereof.

[0027] For the specific description of the second to fifth aspects and their various implementations in the embodiments of the present application, reference can be made to the detailed description in the first aspect and its various implementations; and for the beneficial effects of the second to fifth aspects and their various implementations, reference can be made to the analysis of the beneficial effects in the first aspect and its various implementations, which will not be repeated here.

[0028] These and other aspects of the embodiments of the present application will be more clearly understood in the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of the structure of the clothing care machine in the embodiment of the present application;

[0030] Figure 2 Schematic diagram of the connection between the clothing dryness and wetness detection device and the ultrasonic plate in an embodiment of the present application;

[0031] Figure 3 This is a flow chart of a method for detecting the dryness and wetness status of clothes provided in an embodiment of the present application;

[0032] Figure 4 is a schematic diagram of an echo signal in an embodiment of the present application;

[0033] Figure 5 is another schematic diagram of an echo signal in an embodiment of the present application;

[0034] Figure 6 This is a flow chart for determining the number of target echo signals in an embodiment of the present application.

[0035] Figure 7 This is a flow chart of clothes dryness and wetness status detection of the clothes care machine in an embodiment of the present application;

[0036] Figure 8 Schematic diagram of the structure of a device for detecting the dryness and wetness of clothes provided in an embodiment of the present application;

[0037] Figure 9 This is a structural connection diagram of a clothing care machine provided in an embodiment of the present application. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the present application clearer, the specific embodiments of the present application are further described in detail below in conjunction with the accompanying drawings. It is understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. It should also be noted that, for ease of description, only parts related to the present application, not all of the contents, are shown in the accompanying drawings. Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flow charts. Although the flow charts describe each operation (or step) as a sequential process, many of the operations therein can be implemented in parallel, concurrently or simultaneously. In addition, the order of the operations can be rearranged. The process can be terminated when its operation is completed, but can also have additional steps not included in the accompanying drawings. The process can correspond to a method, function, procedure, subroutine, subprogram, etc.

[0039] It should be noted that, in the present application, relational terms such as first and second are only used to distinguish one entity or operation or object from another entity or operation or object, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations or objects. For example, the "first" and "second" of the first touch operation and the second touch operation are used to distinguish the interactive operations of touching the screen cover at two different times. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, in the description of this application, unless otherwise specified, "multiple" means two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previous and subsequent associated objects are in an "or" relationship.

[0040] The method for detecting the wetness and dryness of clothing provided in this application aims to improve the accuracy and efficiency of detecting the wetness and dryness of clothing by detecting the number of target echo signals of the echo signal based on the attenuation characteristics of the ultrasonic echo signal of clothing in different wetness and dryness states, and by accurately determining the wetness and dryness of clothing placed in the corresponding area of ​​the current open ultrasonic transceiver according to the correspondence between the number of target echo signals in the echo signal and the clothing in different wetness and dryness states.

[0041] Ultrasonic signals are a portion of sound waves that are inaudible to the human ear and have frequencies above 20 kHz. They are generated by the vibration of matter and can only propagate in a medium. When an ultrasonic signal encounters an obstacle during propagation, it is reflected back to the open ultrasonic transceiver, and this portion of the signal is the echo signal. The embodiments of the present application receive this echo signal and utilize the correspondence between clothing items of varying wetness and dryness and the number of target echo signals in their reflected echo signals to accurately detect the wetness and dryness of clothing in the corresponding area.

[0042] The method for detecting the dryness and wetness status of clothes provided in the embodiment of the present application is mainly used in clothing care machines. Figure 1 Schematic diagram of the structure of the clothing care machine is shown. Figure 1 As shown, an ultrasonic plate 11 and a hanger 12 are provided in the inner casing of the clothing care machine. The hanger 12 is used to hang clothes. When the clothing care machine is in operation, clothes are hung on the hanger 12, and the spraying, drying and other equipment in the inner casing are used to perform clothing care operations, thereby realizing the clothing care function of the clothing care machine.

[0043] The ultrasonic plate 11 is equipped with several groups of open ultrasonic transceivers. In practical applications, the ultrasonic plate 11 can be installed on the back panel inside the sealed box. The ultrasonic plate 11 can be installed on the back panel inside the sealed box (i.e., on the back panel opposite the door panel); it can also be installed on the top, bottom, or door panel of the sealed box. The embodiments of this application do not impose any fixed restrictions on its specific installation location. Figure 1 The position of the ultrasonic plate 11 shown in FIG. 1 is taken as an example at the back plate inside the sealed box.

[0044] Each open ultrasonic transceiver can include a transmitting probe 111 and a receiving probe 112, and its setting position corresponds to the setting position of the hanger 12, so as to send ultrasonic signals through the area of ​​the open ultrasonic transceiver corresponding to the hanger 12, and then detect the dryness and wetness status of the clothes through the echo signal.

[0045] For example, an open ultrasonic transceiver is installed on the back panel inside the sealed box, two centimeters below the hanger. This allows echo signal detection for clothes of different lengths, optimizing the detection effect of the dryness and wetness of clothes.

[0046] In practical applications, according to the actual hardware configuration of the clothing care machine, a group of open ultrasonic transceivers can be set up for each hanger 12, so as to realize the ultrasonic signal sending and echo signal receiving of the open ultrasonic transceiver corresponding to the clothing dryness and wetness status detection area, thereby improving the accuracy of determining the dryness and wetness status of the clothing.

[0047] Of course, the setting position of the open ultrasonic transceiver can also be adaptively adjusted according to different clothing dryness and wetness detection scenarios to accurately send and receive signals in the corresponding clothing dryness and wetness detection area.

[0048] Each open ultrasonic transceiver in the embodiment of the present application is connected to a processor in the clothing care machine. Figure 2 The figure shows how each open ultrasonic transceiver is connected to the processor in the clothing care machine. Figure 2 Taking a clothing care machine including three open ultrasonic transceivers (such as open ultrasonic transceiver 1, open ultrasonic transceiver 2, and open ultrasonic transceiver 3) as an example, the processor is connected to the transmitting probe Tx1 of the open ultrasonic transceiver 1 through port Tx1-io, and the processor is connected to the receiving probe Rx1 of the open ultrasonic transceiver 1 through port Rx1-io; the processor is connected to the transmitting probe Tx2 of the open ultrasonic transceiver 2 through port Tx2-io, and the processor is connected to the receiving probe Rx2 of the open ultrasonic transceiver 2 through port Rx2-io; the processor is connected to the transmitting probe Tx3 of the open ultrasonic transceiver 3 through port Tx3-io, and the processor is connected to the receiving probe Rx3 of the open ultrasonic transceiver 3 through port Rx1-io.

[0049] When detecting the wet and dry status of clothes, the clothing wet and dry status detection device sends a pulse signal to the transmitting probe of the corresponding open ultrasonic transceiver, so that the ultrasonic probe sends an ultrasonic signal to its detection area, and then the ultrasonic transceiver receives the echo signal of the ultrasonic signal through the receiving probe. Based on the echo signal, it can be analyzed to determine whether there is clothing in the corresponding detection area of ​​the current open ultrasonic transceiver.

[0050] The following is combined with Figure 1 and Figure 2 The method for detecting the dryness and wetness status of clothes provided in an embodiment of the present application is described.

[0051] Figure 3 A flowchart of a method for detecting the dryness and wetness of clothing provided in Example 1 of the present application is provided. The method for detecting the dryness and wetness of clothing provided in this embodiment can be performed by a clothing dryness and wetness detection device. The clothing dryness and wetness detection device can be implemented in software and / or hardware. The clothing dryness and wetness detection device can be the aforementioned clothing care machine, a processor within the aforementioned clothing care machine, or a control module within the aforementioned clothing care machine for detecting the dryness and wetness of clothing.

[0052] The following description will be made by taking the clothes dryness and wetness detection device as an example to implement the clothes dryness and wetness detection method. Figure 3 The method for detecting the dryness and wetness of clothes specifically includes:

[0053] S110 , monitoring the echo signal received by the open ultrasonic transceiver within a preset time period; the echo signal is a signal generated after the ultrasonic signal sent by the open ultrasonic transceiver is reflected by an obstacle.

[0054] When detecting the wetness or dryness status of clothing, the clothing wetness or dryness status detection device sends a pulse signal to the transmitting probe of the open ultrasonic transceiver corresponding to the area currently required to be detected, so that the transmitting probe transmits an ultrasonic signal in the area currently required to be detected.

[0055] When an ultrasonic signal propagates through an area, any obstacles it encounters reflect an echo signal back to the open ultrasonic transceiver, which then receives the echo signal through the open ultrasonic transceiver's receiving probe. The clothing wetness detection device then analyzes and processes the echo signal to determine the wetness of the clothing placed in the detection area.

[0056] Specifically, such as Figure 4 As shown, in a scenario where an open ultrasonic transceiver has clothing 13 hanging on a hanger 12 within its detection area, the ultrasonic signal emitted by the open ultrasonic transceiver's transmitting probe 111, upon encountering the clothing 13 during propagation, will reflect an echo signal back to the open ultrasonic transceiver, where it is received by the receiving probe 112. Furthermore, the waveform characteristics of the echo signals corresponding to the dry and wet clothing hanging on hanger 12 differ. That is, the waveforms of the echo signals reflected by the dry and wet clothing contain different amounts of target echo signals.

[0057] On the other hand, Figure 5 As shown, in a scenario where there is no clothing hanging on the hanger 12 in the detection area corresponding to the open ultrasonic transceiver, the ultrasonic signal emitted by the transmitting probe 111 of the open ultrasonic transceiver will reflect the echo signal to the open ultrasonic transceiver after reaching the wall of the inner tank of the clothing care machine, and this part of the echo signal will be received by the receiving probe 112.

[0058] It is understandable that when the ultrasonic signal propagates in the corresponding area of ​​the inner tank of the clothing care machine, after the echo signal is reflected by different obstacles (such as clothing or the wall of the inner tank), the open ultrasonic transceiver will receive echo signals with different signal characteristics in different time periods. Moreover, depending on whether there are clothes in the corresponding area, the echo signal returned by the wall of the inner tank of the box has different signal characteristics due to the interference of different obstacles. Based on this principle, this part of the echo signal can also be obtained for analysis and processing, and then it can be determined whether there are clothes in the detection area of ​​the current open ultrasonic transceiver based on the different signal characteristics of the echo signal.

[0059] It should be noted that, generally speaking, after an open ultrasonic transceiver emits an ultrasonic signal, the echo signal reflected by the clothing will first reach the receiving probe of the open ultrasonic transceiver. However, for the echo signal returned by the ultrasonic signal reaching the wall of the inner tank, its return time is relatively long. Therefore, in order to fully obtain the echo signal of the ultrasonic signal and perform effective detection of the wet and dry status of the clothing, it is necessary to set the preset duration of the echo signal according to the depth of the inner tank. Subsequently, when the clothing wet and dry status detection device obtains the echo signal received by the receiving probe, it extracts the echo signal according to the preset duration.

[0060] Among them, the preset time length needs to be proportional to the depth of the inner tank of the clothing care machine.

[0061] It is understandable that the deeper the inner tank is, the later the echo signal reflected from the inner tank wall is received by the receiving probe. In order to fully obtain the echo signal returned by the inner tank wall, it is necessary to set a preset time length based on the inner tank depth to ensure that the receiving probe can fully receive the echo signal returned by the inner tank wall of the clothing care machine within the preset time length, thereby optimizing the echo signal detection effect.

[0062] Optionally, embodiments of the present application employ an open ultrasonic transceiver as a transmitter for ultrasonic signals and a receiver for their echo signals. This transceiver features a convergent transmission waveform, a small angle, minimal aftershocks, and a long range, effectively avoiding unnecessary signal interference and enabling precise, pinpoint detection of ultrasonic signals.

[0063] Because a clothing care machine may contain multiple hangers, different hangers require different open ultrasonic transceivers to detect the wetness and dryness of clothing in corresponding areas. To reduce direct signal interference between different detection areas, an open ultrasonic transceiver is used. Leveraging its convergent waveform, narrow angle, minimal aftershock, and long range, it focuses the direction of the ultrasonic signal it transmits, minimizing echo signals outside the detection area. This, in turn, reduces interference with the echo signal reception and optimizes clothing detection.

[0064] Optionally, the clothing wet / dry status detection device controls the open ultrasonic transceiver to transmit an ultrasonic signal before monitoring the echo signal received by the open ultrasonic transceiver within a preset time period, with the start time of the preset time period being the end time of the ultrasonic signal transmission. By sending a set number of pulse signals at a set frequency to the transmitting probe, the transmitting probe is caused to transmit an ultrasonic signal to the corresponding detection channel. After sending the last pulse signal, the device begins to monitor the echo signal received by the receiving probe within a preset time period. The set number and frequency of pulse signals can be adaptively set according to the actual requirements for detecting the wet / dry status of clothing.

[0065] For example, when detecting the wetness or dryness of clothing, the present application sends eight 40kHz pulse signals to the transmitting probe through the clothing wetness or dryness detection device, thereby generating an ultrasonic signal. The eight 40kHz pulse signals represent a set number and frequency of pulse signals, determined based on actual test results. This output pulse signal generates a better echo signal, further improving the accuracy of clothing wetness or dryness detection.

[0066] S120. Determine the number of target echo signals; the target echo signal includes a first echo signal and a second echo signal received for the first time; the duration of the second echo signal is greater than a first threshold; the first echo signal is a second echo signal among the received echo signals, the time difference between the first echo signal and the reception time of the previous second echo signal being less than a second threshold.

[0067] Specifically, in actual testing, the present invention's embodiments found that when dry clothing was placed in the area corresponding to the ultrasonic transceiver, ultrasonic signal testing detected no echo signal from the inner chamber wall. Specifically, no signal returned within 3 to 4 milliseconds. However, due to the close proximity between the ultrasonic detection device and the clothing, the first echo signal would appear after the aftershock wave (partial interference signal transmitted directly from the transmitting probe through the ultrasonic transceiver's hardware and circuitry to the receiving probe). Furthermore, after a second bounce off the device and clothing, the second echo signal would appear within 2 to 3 milliseconds, with the overall waveform exhibiting a regular distribution. In practice, it was found that when wet clothing was placed, the aftershock wave and the first echo signal would be followed by a series of intermittent pulses, such as a slight pulse followed by a pause, repeating this cycle for a period of time. This waveform phenomenon is caused by the presence of water molecules on wet clothing, which act as a barrier to the clothing, reducing the attenuation of the ultrasonic signal and resulting in multiple reflections of the echo signal.

[0068] Because ultrasonic signals attenuate differently when encountering dry and wet clothing during transmission, the reflected echo signals contain different quantities of a specific echo signal. Based on this attenuation characteristic of dry and wet clothing, actual testing revealed that when clothing of varying dryness and wetness is placed in the corresponding detection area, the number of a specific echo signal in the reflected echo signal corresponds to the clothing's state. Specifically, the number of this specific echo signal in the echo signal falls within a fixed range depending on the clothing's dryness and wetness. Based on this, by defining this specific echo signal as the target echo signal and performing target echo signal detection on the received echo signal, the dryness or wetness of the clothing can be determined based on the number of target echo signals.

[0069] Optionally, due to the presence of wet clothing, a series of intermittent pulse signals may appear continuously after the aftershock wave and the first echo signal appear. Based on actual test results, the duration of the target echo signal is determined to be greater than a fixed time length, and this time length is defined as the first threshold. Furthermore, after receiving the first target echo signal, a series of echo signals appear whose duration is greater than the first threshold and whose time difference between reception times is less than the fixed time length. Based on this, the fixed time length is defined as the second threshold, and the first echo signal and the second echo signal are defined, where the target echo signal includes the first echo signal and the first received second echo signal; the second echo signal has a duration greater than the first threshold; and the first echo signal is a second echo signal among the received echo signals whose time difference with the previous second echo signal is less than the second threshold.

[0070] When performing target echo signal detection within a preset time length, first determine whether an echo signal is received within the preset time length. If no echo signal is detected within the preset time length, the detection abnormality information of the echo signal is output. It is understandable that, generally speaking, within the preset time length after the ultrasonic signal is transmitted, regardless of whether there are clothes in the corresponding area of ​​the open ultrasonic transceiver, the corresponding echo signal (the echo signal reflected by the clothing or the echo signal reflected by the wall of the box body) will be received. Therefore, when the echo signal is not received, it can be determined that there is an abnormality in the detection of the current echo signal. It may be that there is a fault in the ultrasonic transceiver or other hardware structure, which needs to be repaired in time. Therefore, by outputting the detection abnormality information, timely prompts are given to perform abnormal processing to ensure the normal operation of the clothing care machine.

[0071] Furthermore, when an echo signal is received within a preset duration, it is first determined whether the echo signal is a predefined second echo signal (i.e., whether the duration of the echo signal is greater than a first threshold). If so, the number of target echo signals is determined. If not, the echo signal is ignored and detection continues. After the first second echo signal is received, detection of the first echo signal begins. For each detected first echo signal, the number of target echo signals is increased by one. This process continues until the preset duration expires, at which point the number of target echo signals is determined.

[0072] Optionally, when performing the first echo signal detection, if the detection of the two previous and subsequent echo signals exceeds the second threshold, the detection process of the current target echo signal is marked as finished. At this time, the number of target echo signals is determined for subsequent detection of the dryness and wetness status of the clothing.

[0073] S130 : Determine the dryness or wetness state of the clothes corresponding to the open ultrasonic transceiver according to the number of target echo signals.

[0074] Ultimately, based on the waveform characteristics of the echo signals reflected by clothing in different wet / dry states, combined with the number of target echo signals, the wet / dry state of the clothing currently placed in the corresponding area of ​​the open ultrasonic transceiver can be determined. It will be appreciated that, based on actual testing, the waveform characteristics of the echo signals reflected by clothing in different wet / dry states can be used to determine the distribution range of the number of target echo signals, and thus, the signal number threshold corresponding to the target echo signal can be determined. By comparing the set signal number threshold with the number of target echo signals, the state of the clothing placed in the corresponding area of ​​the open ultrasonic transceiver can be determined.

[0075] Optional, in Figure 3 Based on the method for detecting the dry and wet status of clothes shown in FIG. Figure 6 As shown, the process of determining the number of target echo signals includes:

[0076] S1201, detecting the duration of the received echo signal;

[0077] S1202: Determine that a second echo signal having a duration greater than a first threshold is received for the first time at a first moment, and determine that the number of target echo signals is one;

[0078] S1203: Taking the first moment as the starting point, if the next second echo signal is received within a duration range of a second threshold, then increasing the number of target echo signals by one;

[0079] S1204 , and so on, starting from the moment of receiving the next second echo signal, continue detecting until the preset time period ends.

[0080] When determining the number of target echo signals, the duration of the received echo signal is first detected. After the first receipt of a second echo signal with a duration greater than a first threshold, the current target echo signal is determined to be one. Furthermore, starting from the first moment the second echo signal is first received, the target echo signal is detected within a second predicted duration as one sampling duration. If the next second echo signal is detected within the duration of the second threshold, the number of target echo signals is increased by one, and the next sampling duration is entered. This process continues in this manner until the preset duration is reached, at which point the target echo signal determination process ends.

[0081] For example, Figure 7As shown, after the last pulse signal is sent, the detection process of the target echo signal is entered. Whether the receiving probe of the open ultrasonic transceiver receives the echo signal is detected within a preset time length. The embodiment of the present application detects whether the echo signal is received within 4ms (i.e., the preset time length). If so, it determines whether the echo signal is the second echo signal by judging whether the duration of the echo signal is 100 microseconds (i.e., the first threshold). If not, the echo signal is ignored and the next echo signal is detected within the preset time length. When it is determined that the echo signal received for the first time is the second echo signal, the number of target echo signals is determined to be 1.

[0082] Furthermore, after receiving the second echo signal for the first time, the clothing dryness and wetness status detection device detects the first echo signal with a set sampling time of 200 microseconds (i.e., the second threshold). The echo signal is detected within 200 microseconds, and the pulse duration in the echo signal is calculated. When the pulse duration exceeds 100 microseconds, the number of target echo signals is increased by 1. The detection of the next first echo signal is then entered. Similarly, if no echo signal is detected within the set sampling time of 200 microseconds, or the target echo signal number detection process exceeds the preset time, the target echo signal number detection process is terminated to determine the current number of target echo signals.

[0083] Optionally, when determining the wetness / dryness state of clothing corresponding to the open ultrasonic transceiver based on the number of target echo signals, the number of target echo signals may be compared with at least one set signal number threshold, and the wetness / dryness state of clothing placed in the corresponding area of ​​the open ultrasonic transceiver may be determined based on the comparison result. Prior to this, based on actual test results, the number of target echo signals reflecting echo signals from clothing at different wetness / dryness states may be determined, and then set signal number thresholds corresponding to different wetness / dryness states of the clothing may be set for comparison with the number of target echo signals to determine the wetness / dryness state of the clothing.

[0084] Specifically, when comparing the number of target echo signals with the set signal number threshold, if the number of target echo signals is greater than the signal number threshold, it is determined that the clothing is in the first state; if the number of target echo signals is less than the signal number threshold, it is determined that the clothing is in the second state.

[0085] For example, corresponding to the two states of wet and dry clothes, wet clothes are predefined as the first state and dry clothes as the second state, and then a set signal quantity threshold is set according to the number distribution law of the target echo signal reflected by the dry and wet clothes. Figure 7 As shown, the signal quantity threshold is 3. When the number of target echo signals is greater than or equal to 3, it is judged that the clothes placed in the corresponding area of ​​the current open ultrasonic transceiver are wet clothes, otherwise, they are dry clothes, thereby completing the detection of the wet and dry status of clothes in the embodiment of the present application.

[0086] It should be noted that the first and second states described above can be dry and wet, respectively, or can be states with humidity levels of a% and b% (a and b range from 1 to 100). That is, based on actual testing needs, multiple dry and wet states can be set to correspond to different degrees of moisture in clothing. Based on actual testing, the distribution pattern of the number of target echo signals reflected from clothing under each dry and wet state can be determined, and then a set signal quantity threshold corresponding to each predefined state can be set. This facilitates subsequent determination of the corresponding dry and wet state of the clothing based on the set signal quantity threshold.

[0087] For example, based on the target echo signal distribution pattern of the echo signal reflected by dry clothing, it is determined that the target echo signal is present less than 3 times in the echo signal, so the set signal number threshold is set to 3. Subsequently, based on the cumulative number of target echo signals, if the cumulative number is less than 3, the clothing placed in the corresponding area of ​​the open ultrasonic transceiver is determined to be in a predefined dry state. Conversely, if the cumulative number is greater than or equal to 3, the clothing placed in the corresponding area of ​​the open ultrasonic transceiver is determined to be in a predefined wet state. Optionally, to further refine the distinction between clothing in different dry and wet states, for clothing at different dry and wet states, such as 30% humidity, 50% humidity, and 100% humidity, the target echo signal number range is determined based on the target echo signal number distribution pattern of the echo signal reflected by the corresponding clothing. The set signal number threshold can then be set based on this range. For example, if the target echo signal reflected by clothing at 30% humidity contains between 4 and 6 target echo signals, then the set signal number threshold is determined to be 4-6 times, corresponding to the dry and wet state of 30% humidity. Subsequently, based on the cumulative number of target echo signals, when the cumulative number is between 4 and 6, it is determined that the current clothing is in a predefined 30% humidity state. As the humidity of the clothing increases, the number of target echo signals of its reflected echo signal is also relatively large. According to the actual requirements for detecting the dryness and wetness of clothing, a variety of detection processes for different dryness and wetness states can be set. By pre-configuring a set signal quantity threshold, the number of target echo signals based on the target echo signal can be used to ultimately determine the different dryness and wetness states of the clothing. The embodiment of the present application does not impose a fixed limit on the specific number of dryness and wetness states, and will not be elaborated on here.

[0088] Optionally, the embodiment of the present application determines the running time of the associated program in the corresponding area of ​​the open ultrasonic transceiver based on the mapping relationship between different dry and wet states and the running time of the associated program of the clothing care machine. For example, for clothes with 30% humidity, the drying program in the corresponding area is set to run for 10 minutes; for clothes with 80% humidity, the drying program in the corresponding area is set to run for 30 minutes; for dry clothes, the drying program in the corresponding area is set not to run, and the spraying program runs for 3 minutes. According to the mapping relationship between different dry and wet states and the running time of the associated program of the clothing care machine, when the dry and wet state of the clothes in the corresponding area of ​​the open ultrasonic transceiver is determined, the mapping relationship can be queried according to the dry and wet state to determine the running time of each associated program in the area. In this way, the clothing care time can be intelligently adjusted to achieve more efficient care effects and optimize the energy efficiency and user experience of the equipment.

[0089] Optionally, the clothing care machine includes at least two open ultrasonic transceivers. When performing ultrasonic signal detection, the ultrasonic signal transmission timing of each open ultrasonic transceiver is pre-configured, and each open ultrasonic transceiver is controlled to transmit an ultrasonic signal at the corresponding ultrasonic signal transmission timing. It is understood that when the clothing care machine is equipped with multiple open ultrasonic transceivers to detect the wetness and dryness of clothes in multiple detection areas, in order to avoid mutual interference between the signals in each detection area when the ultrasonic transceivers perform ultrasonic signal detection in parallel, the received echo signal contains the signal reflected from other detection areas, which interferes with the wetness and dryness detection of clothes in the current detection area. Based on this, when performing wetness and dryness detection of clothes, the ultrasonic signal transmission timing of each open ultrasonic transceiver is pre-set, so that each open ultrasonic transceiver transmits an ultrasonic signal in sequence at different time points. Correspondingly, each open ultrasonic transceiver will also receive the echo signal of the ultrasonic signal in sequence at different time points. Preferably, in order to further reduce signal interference, it is set that after one ultrasonic transceiver has received the echo signal of the ultrasonic signal, the next ultrasonic transceiver will start transmitting the ultrasonic signal. This can avoid signal interference, further improve the accuracy of clothing dryness and wetness detection, and optimize the effect of clothing dryness and wetness detection.

[0090] From the above description, it can be seen that by monitoring the echo signals received by the open ultrasonic transceiver within a preset time period (the echo signal is the signal after the ultrasonic signal sent by the open ultrasonic transceiver is reflected by an obstacle); then determining the number of target echo signals, wherein the target echo signal includes a first echo signal and a second echo signal received for the first time, the duration of the second echo signal is greater than a first threshold, and the first echo signal is a second echo signal in the received echo signal, the time difference between the reception time of the previous second echo signal and the time difference is less than a second threshold; then, according to the number of target echo signals, the dryness and wetness state of the clothing corresponding to the open ultrasonic transceiver is determined. Using the above technical means, based on the different attenuation characteristics of dry and wet clothing to ultrasonic signals, the dryness and wetness state of the clothing in the corresponding area can be accurately determined according to the number of target echo signals contained in the echo signal, thereby avoiding the misjudgment of the dryness and wetness state of the clothing and improving the clothing state detection accuracy of the clothing care machine.

[0091] In addition, this application accurately adjusts the running time of the clothing care machine according to the dryness and wetness status of the clothes in the corresponding area, which can optimize the clothing care effect and enhance the user experience.

[0092] Based on the above embodiments, Figure 8 This is a structural diagram of a device for detecting the dryness and wetness of clothing provided in Example 2 of the present application. The device for detecting the dryness and wetness of clothing is applied to a clothing care machine including an open ultrasonic transceiver. Figure 8 The clothing dryness and wetness status detection device provided in this embodiment specifically includes: a monitoring module 21, a signal statistics module 22 and a status determination module 23.

[0093] The monitoring module 21 is used to monitor the echo signal received by the open ultrasonic transceiver within a preset time period. The echo signal is a signal after the ultrasonic signal sent by the open ultrasonic transceiver is reflected by an obstacle;

[0094] The signal statistics module 22 is configured to determine the number of target echo signals, wherein the target echo signal includes a first echo signal and a second echo signal received for the first time, wherein the duration of the second echo signal is greater than a first threshold, and wherein the first echo signal is a second echo signal among the received echo signals, wherein the time difference between the reception time of the first echo signal and the reception time of the previous second echo signal is less than the second threshold;

[0095] The state determination module 23 is used to determine the dryness or wetness state of the clothes corresponding to the open ultrasonic transceiver according to the number of target echo signals.

[0096] Specifically, the signal statistics module 22 is specifically used to: detect the duration of the received echo signal; determine that a second echo signal with a duration greater than a first threshold is received for the first time at a first moment, and determine that the number of target echo signals is one; taking the first moment as the starting point, if the next second echo signal is received within the duration range of the second threshold, then determine that the number of target echo signals is increased by one; and so on, starting from the moment of receiving the next second echo signal, continue detecting until the preset duration ends.

[0097] Specifically, the dry and wet state includes a first state and a second state. The state determination module 23 is specifically used to: if the number of target echo signals is greater than the signal number threshold, determine that the clothes are in the first state; if the number of target echo signals is less than the signal number threshold, determine that the clothes are in the second state.

[0098] Specifically, the monitoring module 21 is also used to:

[0099] The open ultrasonic transceiver is controlled to send ultrasonic signals, and the start time of the preset duration is the end time of the ultrasonic signal sending.

[0100] From the above description, it can be seen that by monitoring the echo signals received by the open ultrasonic transceiver within a preset time period (the echo signal is the signal after the ultrasonic signal sent by the open ultrasonic transceiver is reflected by an obstacle); then determining the number of target echo signals, wherein the target echo signal includes a first echo signal and a second echo signal received for the first time, the duration of the second echo signal is greater than a first threshold, and the first echo signal is a second echo signal in the received echo signal, the time difference between the reception time of the previous second echo signal and the time difference is less than a second threshold; then, according to the number of target echo signals, the dryness and wetness state of the clothing corresponding to the open ultrasonic transceiver is determined. Using the above technical means, based on the different attenuation characteristics of dry and wet clothing to ultrasonic signals, the dryness and wetness state of the clothing in the corresponding area can be accurately determined according to the number of target echo signals contained in the echo signal, thereby avoiding the misjudgment of the dryness and wetness state of the clothing and improving the clothing state detection accuracy of the clothing care machine.

[0101] The clothing dryness and wetness status detection device provided in the embodiment of the present application can be used to execute the clothing dryness and wetness status detection method provided in the above embodiment, and has corresponding functions and beneficial effects.

[0102] Based on the above embodiment, the present application embodiment provides a clothing care machine, referring to Figure 9 The clothing care machine includes: a processor 31, a memory 32, a communication module 33, an input device 34, an output device 35 and an open ultrasonic transceiver 36.

[0103] The number of processors in the clothing care machine can be one or more, the number of memories in the clothing care machine can be one or more. The open ultrasonic transceiver, processor, memory, communication module, input device and output device of the clothing care machine can be connected through a bus or other means.

[0104] The memory 32 is a computer-readable storage medium that can be used to store software programs, computer executable programs and modules, such as the program instructions / modules corresponding to the clothing dryness and wetness status detection method described in any embodiment of the present application (for example, the monitoring module, signal statistics module and status determination module in the clothing dryness and wetness status detection device). The memory may mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system and at least one application required for a function; the data storage area can store data created according to the use of the device, etc. In addition, the memory may include a high-speed random access memory and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some instances, the memory may further include a memory remotely located relative to the processor, and these remote memories can be connected to the device via a network. Examples of the above-mentioned network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network and a combination thereof.

[0105] The communication module 33 is used for data transmission, and the open ultrasonic transceiver 36 is used for sending ultrasonic signals and receiving echo signals.

[0106] The processor 31 executes various functional applications and data processing of the device by running the software programs, instructions and modules stored in the memory, that is, realizes the above-mentioned method for detecting the dryness and wetness status of clothes.

[0107] The input device 34 may be used to receive input digital or character information and generate key signal input related to user settings and function control of the device. The output device 35 may include a display device such as a display screen.

[0108] The clothing care machine provided above can be used to execute the clothing dryness and wetness status detection method provided in the above embodiment, and has corresponding functions and beneficial effects.

[0109] Based on the above embodiments, an embodiment of the present application also provides a computer-readable storage medium, which includes computer instructions. When the computer instructions are run on a clothing care machine, the clothing care machine executes the clothing dryness and wetness status detection method described in the above embodiments.

[0110] Storage medium - any of various types of memory devices or storage devices. The term "storage medium" is intended to include: installation media, such as CD-ROMs, floppy disks, or tape drives; computer system memory or random access memory, such as DRAM, DDR RAM, SRAM, EDO RAM, Rambus RAM, etc.; non-volatile memory, such as flash memory, magnetic media (such as hard disks or optical storage); registers or other similar types of memory elements, etc. Storage media may also include other types of memory or combinations thereof. In addition, the storage medium may be located in the first computer system in which the program is executed, or it may be located in a different second computer system that is connected to the first computer system via a network (such as the Internet). The second computer system can provide program instructions to the first computer for execution. The term "storage medium" may include two or more storage media residing in different locations (e.g., in different computer systems connected via a network). The storage medium may store program instructions (e.g., embodied as a computer program) that can be executed by one or more processors.

[0111] Of course, the storage medium containing computer-executable instructions provided in an embodiment of the present application is not limited to the clothing dryness and wetness status detection method described above, and can also execute related operations in the clothing dryness and wetness status detection method provided in any embodiment of the present application.

[0112] An embodiment of the present application also provides a computer program product, which includes computer instructions. When the computer instructions are executed on a clothing care machine, the clothing care machine executes the clothing dryness and wetness status detection method described in the above embodiment.

[0113] The clothing dryness and wetness status detection device, storage medium and clothing care machine provided in the above embodiments can execute the clothing dryness and wetness status detection method provided in any embodiment of the present application. For technical details not described in detail in the above embodiments, please refer to the clothing dryness and wetness status detection method provided in any embodiment of the present application.

[0114] The above are only preferred embodiments of the present application and the technical principles employed. The present application is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions that are possible for those skilled in the art will not depart from the scope of protection of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments and may include more other equivalent embodiments without departing from the concept of the present application. The scope of the present application is determined by the scope of the claims.

Claims

1. A method for detecting the wetness and dryness of clothing, applied to a clothing care machine including an open ultrasonic transceiver, the method comprising: monitoring an echo signal received by the open ultrasonic transceiver within a preset time period; the echo signal is a signal generated after the ultrasonic signal sent by the open ultrasonic transceiver is reflected by an obstacle; the preset time period is proportional to the depth of the inner tank of the clothing care machine; Determining the number of target echo signals; the target echo signals include a first echo signal and a second echo signal received for the first time; the duration of the second echo signal is greater than a first threshold; the first echo signal is a second echo signal among the received echo signals, the time difference between the first echo signal and the reception time of the previous second echo signal being less than a second threshold; The dryness or wetness state of the clothes corresponding to the open ultrasonic transceiver is determined according to the number of the target echo signals.

2. The method for detecting the dryness and wetness of clothes according to claim 1, wherein: Determining the number of target echo signals includes: Detect the duration of the received echo signal; determining that a second echo signal having a duration greater than the first threshold is received for the first time at a first moment, and determining that the number of the target echo signals is one; Taking the first moment as the starting point, if the next second echo signal is received within a duration range of a second threshold, then determining that the number of the target echoes is increased by one; Similarly, detection is continued from the moment of receiving the next second echo signal as the starting point until the preset time period ends.

3. The method for detecting the dryness and wetness of clothes according to claim 1 or 2, characterized in that: The wet and dry state includes a first state and a second state, and determining the wet and dry state of the clothing corresponding to the open ultrasonic transceiver according to the number of the target echo signals includes: If the number of the target echo signals is greater than the signal number threshold, determining that the clothing is in the first state; If the number of the target echo signals is less than the signal number threshold, it is determined that the clothing is in the second state.

4. The method for detecting the dryness and wetness of clothes according to claim 3, wherein: Also includes: The open ultrasonic transceiver is controlled to send an ultrasonic signal, and the starting time of the preset duration is the ending time of the ultrasonic signal sending.

5. A device for detecting the dryness and wetness of clothing, applied to a clothing care machine including an open ultrasonic transceiver, the device comprising: a monitoring module, configured to monitor an echo signal received by the open ultrasonic transceiver within a preset time period; the echo signal being a signal resulting from the ultrasonic signal transmitted by the open ultrasonic transceiver being reflected by an obstacle; the preset time period being proportional to the depth of the inner tank of the clothing care machine; a signal statistics module, configured to determine the number of target echo signals; the target echo signals include a first echo signal and a second echo signal received for the first time; the duration of the second echo signal is greater than a first threshold; the first echo signal is a second echo signal among the received echo signals, the time difference between the first echo signal and the previous second echo signal being received and less than a second threshold; The state determination module is used to determine the dryness and wetness state of the clothes corresponding to the open ultrasonic transceiver according to the number of the target echo signals.

6. The clothing dryness and wetness detection device according to claim 5, characterized in that: The signal statistics module is specifically used for: Detecting the duration of the received echo signal; determining that a second echo signal having a duration greater than the first threshold is first received at a first moment, and determining that the number of target echo signals is one; starting from the first moment, if the next second echo signal is received within the duration range of the second threshold, determining that the number of target echoes is increased by one; Similarly, detection is continued from the moment of receiving the next second echo signal as the starting point until the preset time period ends.

7. The clothing dryness and wetness detection device according to claim 5, characterized in that: The dry and wet states include a first state and a second state, and the state determination module is specifically configured to: If the number of the target echo signals is greater than the signal number threshold, it is determined that the clothing is in the first state; if the number of the target echo signals is less than the signal number threshold, it is determined that the clothing is in the second state.

8. The clothing dryness and wetness detection device according to claim 7, characterized in that: The monitoring module is also used for: The open ultrasonic transceiver is controlled to send an ultrasonic signal, and the starting time of the preset duration is the ending time of the ultrasonic signal sending.

9. A clothing care machine, characterized in that: include: An open ultrasonic transceiver, a memory and one or more processors, wherein the open ultrasonic transceiver is connected to the processor; The memory is used to store computer-executable instructions; The processor is used to call the computer execution instructions and control the operation of the open ultrasonic transceiver, so that when the clothing care machine is running, the computer execution instructions are executed to implement the clothing dryness and wetness status detection method according to any one of claims 1 to 4.

10. A computer-readable storage medium, characterized in that The method comprises computer instructions, which, when executed on a clothing care machine, enable the clothing care machine to execute the method for detecting the dryness and wetness status of clothing as described in any one of claims 1 to 4.

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