Household appliance and control method thereof

Abstract

The invention discloses a household appliance and a control method thereof, the household appliance comprises a detection module, a judgment module and a control module, the detection module comprises a bone voiceprint sensor, and the bone voiceprint sensor is configured to be capable of detecting a vibration signal on the surface of the household appliance and outputting an electric signal; the judgment module is in signal connection with the detection module, and the judgment module is configured to be capable of judging corresponding knocking operation according to the electric signal; the control module is in signal connection with the judgment module, and the control module is configured to be capable of controlling the household appliance to execute the corresponding action instruction according to the corresponding knocking operation.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of household appliance control, and in particular, the present application relates to a household appliance and a control method of the household appliance. BACKGROUND

[0002] With the rapid development of smart home technology, people have higher requirements for the operation convenience of household appliances. The traditional control method of household appliances mainly relies on keys, remote controllers or touch screens and the like to realize, and these control methods have certain limitations in specific scenarios, for example, the user cannot conveniently operate when both hands are occupied. In order to solve this problem, the industry has proposed a variety of household appliance control schemes based on tapping.

[0003] In related technologies, there are some schemes for controlling household appliances to automatically open and close doors. For example, a piezoelectric sensor is used to sense the tapping operation of a user to control the household appliances to automatically open and close doors, but the piezoelectric sensor has a complex process and is expensive, and the tapping position is usually limited to the installation position of the sensor, which results in poor user experience. For another example, an acceleration sensor is used to sense the tapping operation of a user to control the household appliances to automatically open and close doors, but this scheme has poor flexibility and is easily triggered by other environmental vibrations, which leads to misoperation of the household appliances and affects normal use of the user. SUMMARY

[0004] An object of the present application is to provide a new technical solution of a household appliance and a control method of the household appliance.

[0005] According to a first aspect of the present application, a household appliance is provided, comprising:

[0006] a detection module, the detection module comprising a bone voiceprint sensor configured to be able to detect a vibration signal of a surface of the household appliance and output an electric signal;

[0007] a judgment module, the judgment module being in signal connection with the detection module, the judgment module being configured to be able to judge a corresponding tapping operation according to the electric signal;

[0008] a control module, the control module being in signal connection with the judgment module, the control module being configured to be able to control the household appliance to execute a corresponding action instruction according to the corresponding tapping operation.

[0009] Optionally, the bone voiceprint sensor is connected to the surface of the household appliance, and the bone voiceprint sensor comprises a shell, a vibration pickup assembly and a MEMS chip arranged in the shell, the vibration pickup assembly being used to pick up the vibration signal of the surface of the household appliance, and the vibration pickup assembly transmitting the vibration signal to the MEMS chip so that the MEMS chip outputs the electric signal.

[0010] Optionally, the vibration pickup assembly comprises a first substrate and a vibration part connected to the first substrate, and the MEMS chip has an acoustic cavity opposite to and in communication with the vibration part.

[0011] Optionally, the vibration part comprises a first diaphragm connected to the first substrate and a mass block arranged on a side of the first diaphragm away from the MEMS chip.

[0012] Optionally, the MEMS chip comprises a second substrate, a second diaphragm and a back plate connected to the second substrate, a gap being formed between the second diaphragm and the back plate, and the acoustic cavity being formed on the second substrate.

[0013] Optionally, the second diaphragm is arranged close to the vibration part.

[0014] Optionally, the bone acoustic print sensor further comprises an ASIC chip connected to the MEMS chip.

[0015] Optionally, the action instruction comprises any one of opening a door, closing a door, locking, unlocking, heating, cooling, pausing, starting and stopping.

[0016] Optionally, the judging module comprises a processor configured to process the electrical signal and obtain a corresponding frequency domain signal and a frequency spectrum energy distribution of the frequency domain signal, and a comparator configured to compare the frequency spectrum energy distribution of the frequency domain signal with a preset energy threshold to determine a corresponding knocking operation.

[0017] Optionally, the processor is capable of sequentially performing signal amplification, analog-to-digital conversion and time-frequency conversion processing on the electrical signal to obtain the frequency domain signal.

[0018] According to a second aspect of the present application, a control method of a household appliance is provided, comprising:

[0019] obtaining an electrical signal output based on a vibration signal detected by a bone acoustic print sensor on a surface of the household appliance;

[0020] determining a corresponding knocking operation according to the electrical signal;

[0021] controlling the household appliance to perform a corresponding action instruction according to the corresponding knocking operation.

[0022] Optionally, the determining a corresponding knocking operation according to the electrical signal comprises:

[0023] obtaining a frequency domain signal corresponding to a frequency domain of the electrical signal and a frequency spectrum energy distribution of the frequency domain signal;

[0024] The knocking operation of the user knocking the home appliance is determined according to the frequency spectrum energy distribution of the frequency domain signal.

[0025] Optionally, the corresponding knocking operation controls the home appliance to execute the corresponding action instruction, comprising:

[0026] In the case that the first knocking operation of the user knocking the home appliance exists, it is detected whether the second knocking operation of the user knocking the home appliance exists within the second preset time range after the first knocking operation;

[0027] In the case that the second knocking operation exists, the home appliance is controlled to execute the corresponding action instruction.

[0028] One technical effect of the present application is that:

[0029] The present application adopts the bone voiceprint sensor as the detection module applied to the control of the home appliance, collects the vibration signal by the bone voiceprint sensor and outputs the electric signal, the judgment module determines whether the knocking operation of the user knocking the home appliance exists based on the electric signal, and the control module controls the home appliance to execute the action instruction in the case that the knocking operation of the user knocking the home appliance exists.

[0030] Moreover, the price of the bone voiceprint sensor is more advantageous than that of the piezoelectric sensor, which can reduce the cost. At the same time, the bone voiceprint sensor can sense the knocking of any position on the surface of the home appliance, so that the knocking position is not limited, improving the convenience and flexibility of user operation. In addition, the bone voiceprint sensor can support a higher sampling frequency, which can more accurately capture the characteristics of the vibration signal. The bone voiceprint sensor also has a higher signal-to-noise ratio, which can effectively distinguish the knocking signal from the environmental noise, so as to more accurately identify the knocking operation of the user, effectively avoid the false triggering problem, and thus improve the reliability of the control of the home appliance.

[0031] Other features of the present application and its advantages will become apparent from the following detailed description of exemplary embodiments thereof, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0032] The accompanying drawings incorporated in and forming a part of the specification, illustrate embodiments of the present application and, together with the description, serve to explain the principles of the application.

[0033] Figure 1 A schematic block diagram of a home appliance is provided for one embodiment of the present application;

[0034] Figure 2 A schematic diagram of a bone voiceprint sensor is provided for one embodiment of the present application.

[0035] 100, detection module;

[0036] 1, housing; 11, air hole; 2, vibration pickup assembly; 21, first substrate; 22, vibration part; 221, first diaphragm; 222, mass; 2221, air leak hole; 3, MEMS chip; 31, second substrate; 32, second diaphragm; 33, back plate; 4, support part; 41, communication hole; 5, ASIC chip; 6, substrate;

[0037] 200, judging module;

[0038] 300, control module. DETAILED DESCRIPTION

[0039] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of the components and steps set forth in the embodiments, numerical expressions, and numerical values, unless specifically stated otherwise, do not limit the scope of the present application.

[0040] The embodiments of the present application will be described in detail below with reference to the drawings. The embodiments described below by reference to the drawings are exemplary and are for the purpose of explaining the present application and should not be understood as limiting the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of the present application.

[0041] The terms "first", "second" in the specification and claims of the present application can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally means that the front and rear associated objects are in an "or" relationship.

[0042] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as limiting the application. The application is not limited to a particular orientation, configuration and operation of the device or element indicated or implied.

[0043] In the description of the application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0044] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0045] With the development of smart home appliance technology, the interaction control between home appliance devices and users is more and more diversified, for example, through sensing user operation to realize automatic door opening, automatic door closing, starting work or stopping work of home appliance devices.

[0046] In related art, there are some schemes for controlling home appliance devices to automatically open and close doors or start and stop work. For example, through piezoelectric sensor to sense user's knocking operation to control home appliance devices to automatically open and close doors or start and stop work. However, piezoelectric sensor has complex process and high price. And based on the sensing principle of piezoelectric sensor, when piezoelectric sensor is used to collect user's knocking operation, user must knock at the corresponding sensing position of piezoelectric sensor, so that piezoelectric sensor can collect the knocking operation, which limits the knocking position.

[0047] In related art, there are also some schemes for controlling home appliance devices to automatically open and close doors or start and stop work. For example, through acceleration sensor to sense user's knocking operation to control home appliance devices to automatically open and close doors or start and stop work, but this scheme has poor flexibility and is easy to be triggered by mistake.

[0048] Therefore, the applicant applies bone acoustic print sensor to the control of home appliance devices. When the user knocks the home appliance device, the vibration signal generated can be transmitted to the bone acoustic print sensor through the shell 1 of the home appliance device, and drive the vibration pickup assembly 2 in the bone acoustic print sensor to produce vibration, and the sensing assembly senses the vibration and outputs corresponding electric signal.

[0049] Therefore, the control scheme of the household appliance in the embodiments of the present application does not have the limitation of the knocking position, and any position on the surface of the household appliance can drive the vibration pickup assembly 2 in the bone acoustic print sensor to generate vibration through the shell 1 of the household appliance, and the vibration is sensed by the sensing assembly and the corresponding electrical signal is output, so that the control of the household appliance is more flexible and convenient. Moreover, the price of the bone acoustic print sensor is more advantageous than that of the piezoelectric sensor, and the technical problems existing in the piezoelectric ceramic scheme can be solved. In addition, the bone acoustic print sensor can support a higher sampling rate and has a higher signal-to-noise ratio, and has higher detection accuracy, so it is easier to avoid false triggering.

[0050] The household appliance in the embodiments of the present application can be a refrigerator, a washing machine, a dishwasher, a microwave oven, or the like.

[0051] As shown in Figure 1 The household appliance provided by the embodiments of the present application comprises:

[0052] The detection module 100 comprises a bone acoustic print sensor configured to detect the vibration signal on the surface of the household appliance and output an electrical signal;

[0053] The judgment module 200 is in signal connection with the detection module 100, and the judgment module 200 is configured to judge the corresponding knocking operation according to the electrical signal.

[0054] The control module 300 is in signal connection with the judgment module 200, and the control module 300 is configured to control the household appliance to execute the corresponding action instruction according to the corresponding knocking operation.

[0055] Specifically, the bone acoustic print sensor can be installed on the surface or internal structure of the household appliance for real-time collection of the vibration signal applied to the surface of the household appliance. The specific deployment position of the bone acoustic print sensor can be determined based on design requirements, for example, it can be deployed in the front door panel of the household appliance, or it can be deployed in the side panel of the household appliance, or it can be deployed in the upper panel of the household appliance. Among them, in order to ensure that the bone acoustic print sensor is in good contact with the surface of the household appliance, special glue or double-sided tape can be used for fixation to avoid signal transmission errors caused by poor contact.

[0056] In one embodiment, the bone acoustic print sensor can be embedded in any position in the front door panel of the household appliance that is convenient for collecting the vibration signal of the user's knocking operation. The bone acoustic print sensor can detect the vibration signal generated by the knocking operation and output the corresponding electrical signal.

[0057] In one embodiment, the bone-vibration print sensor can support a higher sampling frequency, for example, 8KHz, and for example, with 256 sampling points, the sampling duration is 16ms, and the vibration signal is a time-domain signal lasting for 16ms.

[0058] In one embodiment, the determining module 200 can first perform signal amplification and analog-to-digital conversion processing on the electrical signal output by the bone-vibration print sensor to obtain a processed electrical signal; and based on the processed electrical signal, determine whether there is a knocking operation of the user knocking the home appliance.

[0059] For example, the vibration signal detected by the bone-vibration print sensor is output in the form of a voltage signal, which can be amplified by a signal amplification circuit (for example, a low-noise amplifier) to a level suitable for processing, to obtain an amplified signal. The amplified signal can be an analog signal. The amplified analog signal is input into an analog-to-digital conversion circuit (for example, a high-precision ADC chip) to convert the amplified analog signal to a digital signal. The digital signal is a time-domain digital signal corresponding to the vibration signal collected by the bone-vibration print sensor. The time-domain digital signal can reflect the vibration frequency and energy size of the vibration signal. Therefore, based on the time-domain digital signal, it can be determined whether there is a knocking operation of the user knocking the home appliance.

[0060] In one embodiment, the time-domain signal can be converted to a frequency domain to obtain a frequency-domain signal corresponding to the frequency domain of the vibration signal; and based on the frequency-domain signal, it can be determined whether there is a knocking operation of the user knocking the home appliance.

[0061] In one embodiment, the action instruction in the embodiment of the present application can include any one of the instructions of opening the door, closing the door, locking, unlocking, heating, cooling, pausing, starting, and stopping.

[0062] In the embodiment of the present application, when the determining module 200 determines that there is a knocking operation of the user knocking the home appliance, the current state of the home appliance can be obtained; and according to the current state of the home appliance, the control module 300 can control the home appliance to execute the instructions of opening or closing the door, or starting or stopping.

[0063] Specifically, if the current state of the door panel of the home appliance is the closed state, the home appliance is controlled to open the door. If the current state of the door panel of the home appliance is the open state, the home appliance is controlled to close the door. If the current state of the home appliance is the starting state, the home appliance is controlled to stop. If the current state of the home appliance is the stopping state, the home appliance is controlled to start.

[0064] In the embodiments of the present application, it can be preset that the control module 300 controls the household appliance to execute the action instruction when the judgment module 200 judges that the user has a single knock operation. Alternatively, it can be preset that the control module 300 controls the household appliance to execute the action instruction when the judgment module 200 judges that the user has a continuous multiple knock operation.

[0065] For example, it can be set that the control module 300 controls the household appliance to close the door when the judgment module 200 judges that the user has a single knock operation; or the control module 300 controls the household appliance to open the door when the judgment module 200 judges that the user has a continuous two-time knock operation; or the control module 300 controls the household appliance to start when the judgment module 200 judges that the user has a continuous three-time knock operation.

[0066] In this way, the household appliance in the embodiments of the present application can recognize a plurality of different force and frequency of the knock operation and map it to different action instructions. This enables the user to flexibly select the knock mode to control the household appliance according to the actual needs and operation habits. Taking the washing machine as an example: a single light knock can correspond to starting the washing program, a continuous two-time light knock can correspond to pausing the program, a heavy knock can correspond to selecting the fast washing mode, etc. This diversified knock operation mode provides the user with more control options, further improving the convenience and flexibility of the operation.

[0067] In the embodiments of the present application, the control module 300 can also control the household appliance to execute the corresponding action instruction according to the current state of the household appliance and the number of the user's knock operation judged by the judgment module 200. For example, in the case that the judgment module 200 judges that the current state of the household appliance is closing the door and the number of the user's knock operation is two, the control module 300 controls the household appliance to open the door. In the case that the judgment module 200 judges that the current state of the household appliance is opening the door and the number of the user's knock operation is one, the control module 300 controls the household appliance to close the door. In the case that the judgment module 200 judges that the current state of the household appliance is closing the door and the number of the user's knock operation is three, the control module 300 controls the household appliance to start.

[0068] After receiving the knock operation judgment result transmitted by the judgment module 200, the control module 300 can quickly generate the corresponding action instruction and control the execution mechanism of the household appliance to respond in time. The whole response process is quick and efficient, the time interval from the user's knocking the surface of the device to the household appliance executing the corresponding action is short, which brings the user a smooth and efficient operation experience. At the same time, the household appliance can also feedback the user's knock operation in time through voice prompt, light flashing and other ways, so that the user can clearly know whether the device has received the operation instruction and is executing the corresponding action, thereby also enhancing the interaction and control between the user and the household appliance.

[0069] The application uses a bone acoustic print sensor as a detection module 100 applied to the control of household appliances. The bone acoustic print sensor collects vibration signals and outputs electrical signals. The judgment module 200 determines whether there is a user's knocking operation on the household appliance based on the electrical signals. In the case of a user's knocking operation on the household appliance, the control module 300 controls the household appliance to execute the action instruction.

[0070] The bone acoustic print sensor has a more advantageous price than the piezoelectric sensor, which can reduce costs. At the same time, the bone acoustic print sensor can sense the knocking of any position on the surface of the household appliance, so that the knocking position is not limited, improving the convenience and flexibility of user operation. In addition, the bone acoustic print sensor can support a higher sampling frequency, which can more accurately capture the characteristics of the vibration signal. The bone acoustic print sensor also has a higher signal-to-noise ratio, which can effectively distinguish between knocking signals and environmental noise, so as to more accurately identify the user's knocking operation and effectively avoid false triggering, thereby improving the reliability of the control of the household appliance.

[0071] In addition, the bone acoustic print sensor also has the characteristics of high sensitivity, which can accurately detect the weak vibration signal generated by the knocking on the surface of the household appliance. Even in the case of small knocking force or certain environmental interference, the bone acoustic print sensor can accurately convert the vibration signal into an electrical signal, providing reliable signal input for the subsequent judgment module 200. For example, in an environment with certain noise near the air conditioner outdoor unit, when the user taps the air conditioner shell, the bone acoustic print sensor can still accurately capture the vibration signal, ensuring accurate and accurate subsequent knocking operation judgment.

[0072] Optionally, the bone acoustic print sensor is connected to the surface of the household appliance, and the bone acoustic print sensor includes a shell 1 and a vibration pickup assembly 2 and a MEMS chip 3 arranged in the shell 1. The vibration pickup assembly 2 is used to pick up the vibration signal on the surface of the household appliance, and the vibration pickup assembly 2 transmits the vibration signal to the MEMS chip 3 so that the MEMS chip 3 outputs the electrical signal.

[0073] Specifically, the bone acoustic print sensor is used as a detection module 100 connected to the surface of the household appliance, so that the user does not need to directly touch the operating part of the household appliance, and only needs to perform a tapping action near the surface of the household appliance to realize the control function. This non-contact control method not only conforms to the development trend of modern household appliance intelligence and humanization, but also provides convenience for the control of household appliances in some special scenarios. For example, in a kitchen environment, when the user's hands have oil stains or water stains, there is no need to worry about dirtying the operation panel of the household appliance, and direct tapping on the surface of the household appliance can complete the corresponding operation, thereby improving the safety and convenience of the household appliance.

[0074] As shown in Figure 2 The bone voiceprint sensor can include a shell 1, a substrate 6, a vibration pickup assembly 2 and a MEMS chip 3. The vibration pickup assembly 2 is arranged on the substrate 6, and the shell 1 and the substrate 6 form a closed containing chamber. The shell 1 can be provided with an air hole 11 for internal and external pressure. The substrate 6 can be connected to the surface of the household appliance, so that when the surface of the household appliance is tapped, the vibration of the surface of the household appliance can be transmitted to the vibration pickup assembly 2 through the substrate 6, and the vibration pickup assembly 2 is driven to vibrate, so that the MEMS chip 3 can perceive the vibration signal and output an electric signal.

[0075] In one embodiment, the substrate 6 can be a PCB (Printed Circuit Board) to support the electronic components, facilitating the arrangement of other electronic components on the substrate 6.

[0076] Optionally, the vibration pickup assembly 2 includes a first substrate 21 and a vibration part 22, the vibration part 22 is connected to the first substrate 21, and the MEMS chip 3 has an acoustic cavity that is opposite to and communicates with the vibration part 22.

[0077] As shown in Figure 2 The vibration pickup assembly 2 can include a vibration part 22 and a first substrate 21. The vibration part 22 can pick up the vibration signal of the surface of the household appliance and vibrate accordingly. The first substrate 21 is used to set and support the vibration part 22 to form the vibration pickup assembly 2 together. Specifically, the first substrate 21 can be arranged on the substrate 6, and the vibration part 22 can be connected to the side of the first substrate 21 away from the substrate 6, that is, the vibration part 22 is arranged on the first substrate 21, so that the vibration part 22 has sufficient vibration space.

[0078] The first substrate 21 can be a vibration ring, that is, the first substrate 21 has a ring structure. The ring structure can provide sufficient vibration space for the vibration part 22 while supporting the vibration part 22, facilitating the vibration pickup assembly 2 to accurately pick up the vibration signal of the surface of the household appliance. For example, the first substrate 21 can be a brass ring, a zinc white copper ring or a stainless steel ring.

[0079] Further, a first chamber can be formed between the vibration part 22, the first substrate 21 and the substrate 6, which is the vibration space of the vibration pickup assembly 2, facilitating the vibration pickup assembly 2 to pick up the vibration signal of the surface of the household appliance and vibrate accordingly. The inner diameter or height of the first substrate 21 can be adjusted to expand the volume of the first chamber, so as to ensure that the vibration pickup assembly 2 has sufficient vibration space, facilitating the vibration pickup assembly 2 to accurately pick up the vibration signal of the surface of the household appliance, and improving the recognition accuracy and recognition ability of the detection module 100.

[0080] AsFigure 2 As shown, a MEMS (Micro Electro Mechanical System) chip is placed in a sealed accommodation chamber surrounded by a housing 1 and a substrate 6. For example, a support portion 4 is provided on a first substrate 21, and a MEMS chip 3 is placed on the support portion 4 so that the acoustic cavity of the MEMS chip 3 faces the vibration portion 22. In this way, when the vibration portion 22 picks up a vibration signal from the surface of the household appliance and vibrates accordingly, the MEMS chip 3 can directly sense the air fluctuations caused by the vibration of the vibration portion 22 and output an electrical signal accordingly, thereby realizing the recognition function of the bone voiceprint sensor.

[0081] Optionally, the vibration part 22 includes a first vibration membrane 221 and a mass block 222 , the first vibration membrane 221 is connected to the first substrate 21 , and the mass block 222 is disposed on a side of the first vibration membrane 221 away from the MEMS chip 3 .

[0082] like Figure 2 As shown, the mass block 222 can pick up vibration signals on the surface of the household appliance and vibrate accordingly. The first diaphragm 221 is arranged on the side of the first substrate 21 away from the base plate 6, that is, the first diaphragm 221 is arranged on the first substrate 21, and the mass block 222 is connected to the side of the first diaphragm 221 close to the base plate 6, that is, away from the MEMS chip 3. While using the mass block 222 to pick up vibration signals on the surface of the household appliance, it is possible to fully utilize the internal space of the bone voiceprint sensor, facilitating the miniaturization and integration of the bone voiceprint sensor.

[0083] In one embodiment, the mass block 222 can be set opposite to the MEMS chip 3. The two can be completely opposite or partially opposite. In either case, the vibration of the mass block 222 can form a good excitation for the MEMS chip 3, thereby improving the recognition accuracy of the bone voiceprint sensor. Specifically, when the user taps, the vibration of the surface of the household appliance can drive the bone voiceprint sensor to vibrate, and drive the mass block 222 inside it to vibrate as well, so that the mass block 222 and the first diaphragm 221 can move away from or close to the substrate 6, thereby correspondingly stretching or compressing the air in the first chamber, that is, it can cause the air in the first chamber to fluctuate. The MEMS chip 3 opposite the mass block 222 can sense the fluctuation of the air and output an electrical signal accordingly, thereby realizing the recognition function of the bone voiceprint sensor.

[0084] When the mass 222 vibrates, the air in the first chamber and the second chamber on both sides of the mass 222 and the first diaphragm 221 changes oppositely, for example, when the mass 222 vibrates towards the substrate 6, the air in the first chamber is compressed, and the air in the second chamber is stretched; when the mass 222 vibrates away from the substrate 6, the air in the first chamber is stretched, and the air in the second chamber is compressed. A vent hole 2221 can be formed on the mass 222 to achieve pressure equalization of the first chamber and the second chamber, and improve the working reliability of the bone voiceprint sensor.

[0085] Optionally, the MEMS chip 3 comprises a second substrate 31, and a second diaphragm 32 and a back plate 33 connected to the second substrate 31, the second diaphragm 32 and the back plate 33 have a gap therebetween, and the acoustic cavity is formed on the second substrate 31.

[0086] As shown in Figure 2 , the second substrate 31 can be connected to the support part 4, and the acoustic cavity on the second substrate 31 faces the vibration part 22. In this way, when the vibration part 22 picks up the vibration signal on the surface of the household appliance and vibrates, the second diaphragm 32 of the MEMS chip 3 can sense the vibration of the vibration part 22 and vibrate accordingly, thereby changing the capacitance value between the second diaphragm 32 and the back plate 33, and further outputting the corresponding electrical signal and realizing the identification function of the bone voiceprint sensor.

[0087] Optionally, the second diaphragm 32 is arranged close to the vibration part 22.

[0088] As shown in Figure 2 , the second diaphragm 32 is arranged close to the vibration part 22, and the back plate 33 is arranged away from the vibration part 22, so that when the vibration part 22 vibrates, the vibration can directly act on the second diaphragm 32, drive the second diaphragm 32 to vibrate and change the capacitance value between the second diaphragm 32 and the back plate 33, facilitating the accurate sensing of the vibration of the vibration part 22 by the second diaphragm 32, and improving the identification accuracy and identification ability of the bone voiceprint sensor.

[0089] In one embodiment, a communication hole 41 can also be formed on the support part 4, and the communication hole 41 is used to communicate the acoustic cavity of the MEMS chip 3 with the vibration part 22, so that the vibration of the vibration part 22 can be transmitted to the second diaphragm 32 through the communication hole 41 and the acoustic cavity.

[0090] Optionally, the bone voiceprint sensor further comprises an ASIC chip 5, and the ASIC chip 5 is in signal connection with the MEMS chip 3.

[0091] As shown in Figure 2As shown, the ASIC (Application Specific Integrated Circuit) chip is arranged on the support part 4, and the ASIC chip 5 and the MEMS chip 3 are electrically connected, so that the ASIC chip 5 can receive and process the electrical signal output by the MEMS chip 3 and then output, and at the same time, arranging the ASIC chip 5 on the support part 4 can also make full use of the surface space of the support part 4, reduce the lateral size of the bone voiceprint sensor, and facilitate the miniaturization development of the bone voiceprint sensor.

[0092] Optionally, the action instruction includes any one of opening a door, closing a door, locking, unlocking, heating, cooling, pausing, starting, and stopping.

[0093] Specifically, the control module 300 can control the household appliance to execute the corresponding action instruction in a case where the judgment module 200 judges that the user has different knocking operations. In this way, the household appliance of the embodiment of the present application can recognize a plurality of different force and frequency knocking operations and map them into different action instructions. This enables the user to flexibly select the knocking mode to control the household appliance according to the actual needs and operation habits.

[0094] Taking a washing machine as an example: one light knock can correspond to starting a washing program, two consecutive light knocks can correspond to pausing the program, and one heavy knock can correspond to selecting a fast washing mode. This diversified knocking operation mode provides the user with more control options and further improves the convenience and flexibility of operation.

[0095] Optionally, the judgment module 200 includes a processor and a comparator, the processor is configured to process the electrical signal and obtain a corresponding frequency domain signal and a frequency spectrum energy distribution of the frequency domain signal, and the comparator is configured to compare the frequency spectrum energy distribution of the frequency domain signal with a preset energy threshold to judge the corresponding knocking operation.

[0096] Specifically, since the bone voiceprint sensor has the advantage of supporting a higher sampling frequency, the processor can convert the time domain electrical signal output by the bone voiceprint sensor to the frequency domain to obtain a frequency domain signal corresponding to the frequency domain of the electrical signal, so that the electrical signal can function in the frequency domain. In this way, whether the user has a knocking operation of knocking the household appliance can be detected based on the frequency domain signal.

[0097] In the embodiment of the present application, the processor can perform time-frequency conversion processing on the electrical signal output by the bone acoustic print sensor to obtain a frequency domain signal corresponding to the frequency domain of the electrical signal. For example, the processor can use a Fourier transform algorithm to convert the time domain electrical signal output by the bone acoustic print sensor into a frequency domain signal corresponding to the frequency domain of the electrical signal; the processor can also sequentially perform signal amplification, analog-to-digital conversion, and time-frequency conversion processing on the electrical signal output by the bone acoustic print sensor to obtain a frequency domain signal corresponding to the frequency domain of the electrical signal. The frequency domain signal is a frequency domain signal corresponding to the time domain vibration signal collected by the bone acoustic print sensor in each sampling.

[0098] The frequency spectrum energy distribution of the frequency domain signal in the embodiment of the present application refers to the distribution of the total energy of the frequency domain signal at different frequency components. It describes how the signal energy changes with frequency.

[0099] In one embodiment, in the case where the frequency spectrum energy distribution of the frequency domain signal indicates that the energy value corresponding to at least one frequency component in the set frequency band is greater than the first energy threshold, the comparator can determine that the user is performing a knocking operation on the home appliance.

[0100] In one embodiment, the processor can also obtain an energy accumulation sum of the frequency domain signal in the set frequency band according to the frequency spectrum energy distribution of the frequency domain signal. In the case where the energy accumulation sum is greater than a second energy threshold, the comparator can determine that the user is performing a knocking operation on the home appliance. At this time, the energy accumulation sum of the frequency domain signal in the set frequency band refers to the energy value obtained by accumulating the energy of the set frequency band in the current sampling duration.

[0101] The energy threshold in the embodiment of the present application can be set according to experiments, and can generally be set to a value that can effectively distinguish between user knocking vibrations and vibrations caused by environmental noise.

[0102] In this way, in the embodiment, the advantages of the high sampling frequency of the bone acoustic print sensor are effectively utilized, and the frequency spectrum energy distribution of the vibration signal collected by the bone acoustic print sensor in the frequency domain is used to determine the user's knocking operation, effectively reducing the occurrence of problems such as low recognition rate and high false triggering rate caused by the low sampling frequency of the acceleration sensor.

[0103] Optionally, the processor can sequentially perform signal amplification, analog-to-digital conversion, and time-frequency conversion processing on the electrical signal and obtain the frequency domain signal.

[0104] Specifically, the processor can perform time-frequency conversion processing on the electrical signal output by the bone voiceprint sensor to obtain a frequency domain signal corresponding to the frequency domain of the electrical signal. For example, the processor can sequentially perform signal amplification, analog-to-digital conversion, and time-frequency conversion processing on the electrical signal output by the bone voiceprint sensor to obtain a frequency domain signal corresponding to the frequency domain of the electrical signal. The frequency domain signal is a frequency domain signal corresponding to the time domain vibration signal collected by the bone voiceprint sensor each time it samples.

[0105] The embodiments of the present application also provide a control method of a household appliance, comprising:

[0106] S100, acquiring an electrical signal output based on a vibration signal detected by a bone voiceprint sensor on a surface of the household appliance;

[0107] S200, judging a corresponding knocking operation according to the electrical signal;

[0108] S300, controlling the household appliance to execute a corresponding action instruction according to the corresponding knocking operation.

[0109] In this way, the household appliance of the embodiments of the present application can recognize knocking operations of various different forces and frequencies and map them into different action instructions. This enables the user to flexibly select a knocking manner to control the household appliance according to actual needs and operation habits.

[0110] After receiving the knocking operation judgment result transmitted by the judgment module 200, the control module 300 can quickly generate a corresponding action instruction and control the actuator of the household appliance to respond in time. The whole response process is quick and efficient, and the time interval from the user knocking the surface of the device to the household appliance executing the corresponding action is short, which brings the user a smooth and efficient operation experience. At the same time, the household appliance can also feedback the user's knocking operation in real time through sound prompts, light flashes, etc., so that the user can clearly know whether the device has received the operation instruction and is executing the corresponding action, thereby also enhancing the interaction and control between the user and the household appliance.

[0111] In addition, the price of the bone voiceprint sensor is more advantageous than that of the piezoelectric sensor, which can reduce the cost. At the same time, the bone voiceprint sensor can sense the knocking of any position on the surface of the household appliance, so that the knocking position is not limited, improving the convenience and flexibility of user operation. In addition, the bone voiceprint sensor can support a higher sampling frequency, which can more accurately capture the characteristics of the vibration signal. The bone voiceprint sensor also has a higher signal-to-noise ratio, which can effectively distinguish the knocking signal from the environmental noise, so as to more accurately recognize the user's knocking operation and effectively avoid the problem of false triggering, thereby improving the reliability of the control of the household appliance.

[0112] Optionally, the judging a corresponding knocking operation according to the electrical signal comprises:

[0113] obtaining a frequency domain signal corresponding to the electric signal in a frequency domain and a spectral energy distribution of the frequency domain signal;

[0114] determining, according to the spectral energy distribution of the frequency domain signal, whether the knocking operation of the user exists.

[0115] Specifically, since the bone acoustic print sensor has the advantage of supporting a higher sampling frequency, the processor can convert the time-domain electric signal output by the bone acoustic print sensor to a frequency domain to obtain a frequency domain signal corresponding to the electric signal in the frequency domain, so that the electric signal can function in the frequency domain, and thus whether the knocking operation of the user exists can be detected based on the frequency domain signal.

[0116] In the embodiment of the present application, the processor can perform time-frequency conversion processing on the electric signal output by the bone acoustic print sensor to obtain a frequency domain signal corresponding to the electric signal in the frequency domain. For example, the processor can use a Fourier transform algorithm to convert the time-domain electric signal output by the bone acoustic print sensor to a frequency domain signal corresponding to the electric signal in the frequency domain; or the processor can sequentially perform signal amplification, analog-to-digital conversion, and time-frequency conversion processing on the electric signal output by the bone acoustic print sensor to obtain a frequency domain signal corresponding to the electric signal in the frequency domain. The frequency domain signal is a frequency domain signal corresponding to the time-domain vibration signal collected by the bone acoustic print sensor in each sampling.

[0117] The spectral energy distribution of the frequency domain signal in the embodiment of the present application refers to the distribution of the total energy of the frequency domain signal at different frequency components. It describes how the signal energy changes with the frequency.

[0118] In one embodiment, in the case where the spectral energy distribution of the frequency domain signal represents that the energy value corresponding to at least one frequency component in the set frequency band of the frequency domain signal is greater than a first energy threshold, the comparator can determine that the knocking operation of the user exists.

[0119] In one embodiment, the processor can also obtain an energy accumulation sum of the frequency domain signal in the set frequency band according to the spectral energy distribution of the frequency domain signal. In the case where the energy accumulation sum is greater than a second energy threshold, the comparator can determine that the knocking operation of the user exists. At this time, the energy accumulation sum of the frequency domain signal in the set frequency band refers to the energy value obtained by accumulating the energy of the set frequency band in the current sampling duration.

[0120] The energy threshold in the embodiment of the present application can be set according to experiments, and can generally be set to a value that can effectively distinguish between user knocking vibration and vibration caused by environmental noise.

[0121] In some embodiments, in the case that the energy accumulation sum is greater than the second energy threshold, the step of determining that the user taps the home appliance in the tapping operation can comprise: obtaining a plurality of energy accumulation sums corresponding to the vibration signals collected in a plurality of sampling time lengths; and in the case that the duration in which the plurality of energy accumulation sums are all greater than the second energy threshold is within the first preset time length range, determining that the user taps the home appliance in the tapping operation.

[0122] In one embodiment, in the case that the energy accumulation sum corresponding to the vibration signal collected in the current sampling time length is greater than the second energy threshold, the energy accumulation sum corresponding to the vibration signal collected in the next sampling time length can be continuously obtained. Each time an energy accumulation sum is obtained and the energy accumulation sum is greater than the second energy threshold, the duration in which the energy accumulation sum is greater than the second energy threshold is accumulated. If the duration in which the energy accumulation sum is greater than the second energy threshold obtained finally is less than the minimum value of the first preset time length range, it is determined that the user does not tap the home appliance in the tapping operation. If the duration in which the energy accumulation sum is greater than the second energy threshold obtained finally is greater than the maximum value of the first preset time length range, it is also determined that the user does not tap the home appliance in the tapping operation. If the duration in which the energy accumulation sum is greater than the second energy threshold obtained finally is within the first preset time length range, it is determined that the user taps the home appliance in the tapping operation.

[0123] Through the method of the embodiment, some non-normal tapping operations can be filtered, and the recognition accuracy of the user tapping operation is improved.

[0124] Optionally, the controlling the home appliance to perform the corresponding action instruction according to the corresponding tapping operation comprises:

[0125] In the case that the first tapping operation in which the user taps the home appliance exists, it is detected whether the second tapping operation in which the user taps the home appliance exists within a second preset time length range after the first tapping operation;

[0126] In the case that the second tapping operation exists, the home appliance is controlled to perform the corresponding action instruction.

[0127] In the case that the duration between the first energy peak value and the second energy peak value is within the second preset time length range, the home appliance is controlled to perform the action instruction.

[0128] Specifically, the second preset time length range in the embodiment of the present application is greater than the first preset time length range. The second preset time length range can be determined according to a time length range of a user's continuous tapping operation habit. In one example, the second preset time length range can be set to 500 ms to 2000 ms. In this way, the method of the present embodiment can avoid the problem of false triggering caused by user misoperation.

[0129] While some specific embodiments of the present application have been described in detail by way of examples, it should be understood that the examples are for illustration only and are not intended to limit the scope of the present application. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A household appliance, characterized in that: include: a detection module, the detection module including a bone voiceprint sensor, the bone voiceprint sensor being configured to detect a vibration signal on a surface of the household appliance and output an electrical signal; a judgment module, the judgment module being signal-connected to the detection module and configured to judge a corresponding tapping operation according to the electrical signal; A control module is connected to the judgment module by signal, and the control module is configured to control the home appliance to execute a corresponding action instruction according to a corresponding tapping operation.

2. The household appliance according to claim 1, wherein: The bone voiceprint sensor is connected to the surface of the household appliance. The bone voiceprint sensor includes a shell and a vibration pickup component and a MEMS chip arranged in the shell. The vibration pickup component is used to pick up the vibration signal on the surface of the household appliance. The vibration pickup component transmits the vibration signal to the MEMS chip so that the MEMS chip outputs the electrical signal.

3. The household appliance according to claim 2, characterized in that: The vibration pickup assembly includes a first substrate and a vibration part, wherein the vibration part is connected to the first substrate, and the MEMS chip has an acoustic cavity, which is opposite to and communicates with the vibration part.

4. The household appliance according to claim 3, characterized in that: The vibration part includes a first vibration membrane and a mass block, the first vibration membrane is connected to the first substrate, and the mass block is arranged on a side of the first vibration membrane away from the MEMS chip.

5. The household appliance according to claim 3, characterized in that: The MEMS chip includes a second substrate, a second diaphragm connected to the second substrate, and a back plate. There is a gap between the second diaphragm and the back plate, and the acoustic cavity is opened on the second substrate.

6. The household appliance according to claim 5, characterized in that: The second diaphragm is disposed close to the vibration part.

7. The household appliance according to claim 2, characterized in that: The bone voiceprint sensor further includes an ASIC chip, and the ASIC chip is signal-connected to the MEMS chip.

8. The household appliance according to claim 1, wherein: The action instruction includes any one of opening, closing, locking, unlocking, heating, cooling, pausing, starting and stopping.

9. The household appliance according to claim 1, wherein: The judgment module includes a processor and a comparator. The processor is configured to process the electrical signal and obtain the corresponding frequency domain signal and the spectral energy distribution of the frequency domain signal. The comparator is configured to compare the spectral energy distribution of the frequency domain signal with a preset energy threshold to determine the corresponding tapping operation.

10. The household appliance according to claim 9, characterized in that: The processor can sequentially perform signal amplification, analog-to-digital conversion, and time-frequency conversion on the electrical signal to obtain the frequency domain signal.

11. A method for controlling a household appliance, characterized in that: include: Acquiring an electrical signal detected by a bone voiceprint sensor and outputted based on a vibration signal on a surface of the household appliance; determining a corresponding tapping operation according to the electrical signal; The home appliance is controlled to execute corresponding action instructions according to the corresponding tapping operation.

12. The control method according to claim 11, characterized in that: The determining the corresponding tapping operation according to the electrical signal includes: Acquire a frequency domain signal corresponding to the frequency domain of the electrical signal and a spectrum energy distribution of the frequency domain signal; Determine whether a tapping operation of the home appliance by the user occurs according to the spectrum energy distribution of the frequency domain signal.

13. The control method according to claim 11, characterized in that: The controlling the household appliance to execute a corresponding action instruction according to the corresponding tapping operation includes: In a case where a user performs a first tapping operation on the home appliance, detecting whether the user performs a second tapping operation on the home appliance within a second preset time period after the first tapping operation; In the event of the second tapping operation, the home appliance is controlled to execute a corresponding action instruction.

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