Voice wake-up device, control method of voice wake-up device and electronic equipment

Abstract

The invention relates to a voice wake-up device, a control method of the voice wake-up device and electronic equipment, the voice wake-up device comprises a pickup tube, a voice recognition assembly, a friction electrode assembly, a rectification circuit module and a power management circuit module, the pickup tube is provided with a pickup channel, and the friction electrode assembly comprises a first electrode plate and a second electrode plate. The first electrode plate and the second electrode plate are used for mutually rubbing to generate current when airflow flows through the pickup channel; the rectifying circuit module is used for rectifying the current and outputting an electric signal, the power management circuit module is electrically connected to the voice recognition assembly and the rectifying circuit module, and the power management circuit module controls the power supply to supply power to the voice recognition assembly when the electric signal meets a preset condition. According to the voice wake-up device, the control method of the voice wake-up device and the electronic equipment, the power consumption of the voice wake-up device can be reduced while the voice signal is detected.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to a voice wake-up device, a control method for a voice wake-up device, and an electronic device. Background Art

[0002] With the development of communication technology and the needs of people's daily life, electronic devices such as mobile phones, tablets, and smart watches are becoming more and more popular.

[0003] In the related art, electronic devices usually use voice wake-up devices to implement wake-up operations in locked or off-screen states to improve the wake-up operation experience.

[0004] However, the related technology requires that the power supply be kept to supply power to the voice recognition component to detect the voice wake-up signal that may appear at any time. This setting will increase the power consumption of the electronic device when it is in standby mode, which is not conducive to extending the battery life of the electronic device. Although intermittent detection of voice wake-up signals can reduce power consumption, the voice recognition component cannot detect the voice wake-up signal normally when it is in a rest state, resulting in missing the voice wake-up signal and failing to respond to the wake-up operation in time, which results in a poor wake-up operation experience. Summary of the invention

[0005] The present application provides a voice wake-up device, a control method for the voice wake-up device, and an electronic device to solve the technical problem of how to balance a good wake-up operation experience with reducing power consumption.

[0006] On the one hand, the present application provides a voice wake-up device, comprising:

[0007] A sound pickup tube, provided with a sound pickup channel;

[0008] A speech recognition component, used for recognizing the sound collected through the sound pickup channel;

[0009] A friction electrode assembly, comprising a first electrode sheet and a second electrode sheet, wherein the first electrode sheet and the second electrode sheet are arranged in the sound pickup channel and are used to generate current by friction with each other when air flows through the sound pickup channel;

[0010] a rectifier circuit module, electrically connected to the first electrode sheet and the second electrode sheet, the rectifier circuit module being used to rectify the current generated by the friction between the first electrode sheet and the second electrode sheet, and output an electrical signal;

[0011] A power management circuit module is electrically connected to the voice recognition component and the rectifier circuit module. The power management circuit module is used to receive the electrical signal output by the rectifier circuit module and control the power supply to supply power to the voice recognition component when the electrical signal meets a preset condition.

[0012] In one embodiment, the electrical signal includes at least one of a current signal, a voltage signal and an electrical pulse signal.

[0013] In one embodiment, the speech recognition component includes a microphone, a codec and an audio signal processor, the microphone is located in the sound pickup channel or at one end of the sound pickup channel, the codec is electrically connected between the microphone and the audio signal processor, and the microphone, the codec and the audio signal processor are all electrically connected to the power management circuit module.

[0014] In one embodiment, the first electrode sheet and the second electrode sheet are provided with dust removal holes for filtering the gas flowing through the sound pickup channel, and when the airflow flows through the dust removal holes, the first electrode sheet and the second electrode sheet move relative to each other under the action of the airflow and generate current through friction.

[0015] In one embodiment, the sound pickup channel comprises a first channel and a second channel which are connected to each other, and the first channel and the second channel are arranged at an angle.

[0016] In one embodiment, the length of the first channel is greater than that of the second channel, and the first electrode sheet and the second electrode sheet are arranged in the first channel at intervals along the length direction of the first channel.

[0017] In one embodiment, the first electrode sheet and the second electrode sheet are spaced 0.5 mm to 0.9 mm apart in the first channel; and / or, an angle between a thickness direction of at least one of the first electrode sheet and the second electrode sheet and a length direction of the first channel is 0° to 15°.

[0018] In one embodiment, all edges of the first electrode sheet and all edges of the second electrode sheet are connected to the inner wall of the first channel. When air flows through the dust removal hole, the first electrode sheet and the second electrode sheet move relative to each other along the thickness direction of the first electrode sheet and collide with each other, thereby generating current by friction.

[0019] In one embodiment, the first electrode sheet and the second electrode sheet are stacked and in contact with each other. When air flows through the dust removal hole, the first electrode sheet and the second electrode sheet maintain contact and their contact area increases or decreases under the disturbance of the air flow.

[0020] In one embodiment, the inner wall of the sound pickup channel is provided with a first connecting portion and a second connecting portion, the first connecting portion and the second connecting portion are staggered with each other around the length direction of the sound pickup channel, a portion of the edge of the first electrode sheet is connected to the first connecting portion, and a portion of the edge of the second electrode sheet is connected to the second connecting portion, and when the airflow flows through the dust removal hole, the first electrode sheet and the second electrode sheet swing relative to the first connecting portion and the second connecting portion respectively, so that the contact area between the first electrode sheet and the second electrode sheet becomes larger or smaller.

[0021] On the other hand, the present application provides a control method for a voice wake-up device, the voice wake-up device comprising a sound pickup tube, a voice recognition component, a friction electrode component, a rectifier circuit module and a power management circuit module, the sound pickup tube is provided with a sound pickup channel, the friction electrode component comprises a first electrode sheet and a second electrode sheet, the first electrode sheet and the second electrode sheet are provided in the sound pickup channel, and are used to rub against each other when air flows through the sound pickup channel to generate current, the rectifier circuit module is used to rectify the current generated by the friction between the first electrode sheet and the second electrode sheet, and output an electrical signal, the power management circuit module is electrically connected to the voice recognition component and the rectifier circuit module, the method comprises:

[0022] The power management circuit module receives the electrical signal output by the rectifier circuit module;

[0023] When the electrical signal meets a preset condition, the power management circuit module controls the power supply to supply power to the voice recognition component, so that the voice recognition component recognizes the sound collected through the sound pickup channel.

[0024] In one embodiment, the electrical signal includes a current signal, and when the current value corresponding to the current signal is within a preset current range, the power management circuit module controls the power supply to supply power to the speech recognition component;

[0025] In one embodiment, the electrical signal includes a voltage signal, and when the voltage value corresponding to the voltage signal is within a preset voltage range, the power management circuit module controls the power supply to supply power to the speech recognition component;

[0026] In one embodiment, the electrical signal includes an electrical pulse signal, and when at least one of the pulse width, pulse period, pulse repetition frequency, peak power and average power of the electrical pulse signal is within a preset range, the power management circuit module controls the power supply to supply power to the voice recognition component.

[0027] In one embodiment, the electrical signal includes a current signal and a voltage signal, and when the current value corresponding to the current signal is within a preset current range, and the voltage value corresponding to the voltage signal is within a preset voltage range, the power management circuit module controls the power supply to supply power to the speech recognition component;

[0028] In one embodiment, the electrical signal includes a current signal and an electrical pulse signal, and when the current value corresponding to the current signal is within a preset current range, and at least one of the pulse width, pulse period, pulse repetition frequency, peak power and average power of the electrical pulse signal is within a preset range, the power management circuit module controls the power supply to supply power to the voice recognition component;

[0029] In one embodiment, the electrical signal includes a voltage signal and an electrical pulse signal. When the voltage value corresponding to the voltage signal is within a preset voltage range, and at least one of the pulse width, pulse period, pulse repetition frequency, peak power and average power of the electrical pulse signal is within a preset range, the power management circuit module controls the power supply to supply power to the voice recognition component.

[0030] On the other hand, the present application provides an electronic device, including a shell and a voice wake-up device as described above, wherein the voice wake-up device is disposed in the shell, the shell is provided with a through hole, and the sound pickup channel is connected to the outside through the through hole.

[0031] In one of the embodiments, the sound pickup tube of the voice wake-up device is integrally formed with the shell.

[0032] In one embodiment, the electronic device includes a battery, the battery is disposed in the space enclosed by the shell, and the battery is electrically connected to the power management circuit module.

[0033] The voice wake-up device, the control method of the voice wake-up device and the electronic device of the present application are provided with a first electrode sheet and a second electrode sheet in the sound pickup channel of the voice wake-up device. When the airflow flows through the sound pickup channel, the first electrode sheet and the second electrode sheet rub against each other to generate a current which is rectified by the rectifier circuit module, and the rectifier circuit module outputs an electrical signal; since the power management circuit module is electrically connected to the voice recognition component and the rectifier circuit module, when the electrical signal output by the rectifier circuit module meets the preset condition, the power management circuit module controls the power supply to supply power to the voice recognition component. In this way, the power supply does not need to supply power to the voice recognition component all the time. When the user makes a voice, the sound airflow flows through the sound pickup channel so that the first electrode sheet and the second electrode sheet rub against each other to generate a current. When the electrical signal output by the rectifier circuit module rectifies the current generated by the friction between the first electrode sheet and the second electrode sheet and meets the preset condition, it triggers the power management circuit module to control the power supply to supply power to the voice recognition component, so that the voice recognition component can recognize the voice made by the user. On the one hand, this solution can make it unnecessary for the power supply to supply power to the voice recognition component all the time, thereby reducing the power consumption of the device. On the other hand, when the user speaks, this solution will prompt the power supply to supply power to the voice recognition component, so that the voice recognition component can recognize the user's voice, so as not to miss the user's voice command. Therefore, this solution can reduce the power consumption of the voice wake-up device while taking into account the detection of the voice signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 It is a schematic structural diagram of an electronic device according to an embodiment.

[0036] Figure 2 The present invention is a circuit principle block diagram of a voice wake-up device for an electronic device according to one embodiment.

[0037] Figure 3 The figure is a schematic cross-sectional structure diagram of a part of the structure of an electronic device according to one embodiment.

[0038] Figure 4 The present invention is a schematic structural diagram of a first electrode sheet and a second electrode sheet in a voice wake-up device of an electronic device according to one embodiment.

[0039] Figure 5 The present invention is a schematic structural diagram of a voice wake-up device for an electronic device according to one embodiment.

[0040] Figure 6 The figure is a schematic diagram of the structure of a voice wake-up device for an electronic device according to another embodiment.

[0041] Figure 7 This is a schematic diagram of the arrangement positions of the first electrode sheet and the second electrode sheet in the sound pickup channel in a voice wake-up device according to one embodiment.

[0042] Figure 8 for Figure 7 A schematic structural diagram of the relative movement of the first electrode sheet and the second electrode sheet when the airflow F flows into the sound pickup channel through the sound pickup port in the voice wake-up device shown.

[0043] Fig. 9 The present invention is a schematic diagram of the working principle of a voice wake-up device of an electronic device according to one embodiment.

[0044] Fig.10 The present invention is a flowchart of a method for controlling a voice wake-up device of an electronic device according to an embodiment of the present invention.

[0045] Fig.11 This is a schematic diagram of the structure of the electronic device of the present application.

[0046] Description of Figure Numbers:

[0047] 100. Electronic device; 10. Shell; 10a. Through hole; 11. Front shell; 12. Frame; 13. Back cover; 20. Voice wake-up device; 21. Sound pickup tube; 211. Sound pickup channel; 211a. Sound pickup port; 211b. First connecting part; 211c. Second connecting part; 2111. First channel; 2112. Second channel; 22. Voice recognition component; 221. Microphone; 222. Codec; 223. Audio signal processor; 23. Friction electrode component; 23a. Dust removal hole; 231. First electrode sheet; 232. Second electrode sheet; 24. Rectifier circuit module; 25. Power management circuit module; 30. Battery. DETAILED DESCRIPTION

[0048] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0049] As used herein, "electronic device" refers to a device that can receive and / or send communication signals, including but not limited to a device that is connected via any one or more of the following connection methods:

[0050] (1) Connection via wired lines, such as Public Switched Telephone Networks (PSTN), Digital Subscriber Line (DSL), digital cable, and direct cable connection;

[0051] (2) Via wireless interfaces, such as cellular networks, wireless local area networks (WLAN), digital television networks such as DVB-H networks, satellite networks, and AM-FM broadcast transmitters.

[0052] An electronic device configured to communicate via a wireless interface may be referred to as a "mobile terminal". Examples of mobile terminals include, but are not limited to, the following electronic devices:

[0053] (1) Satellite phone or cellular phone;

[0054] (2) Personal Communications System (PCS) terminals that can combine cellular radio telephones with data processing, fax, and data communications capabilities;

[0055] (3) Radiotelephone, pager, Internet / Intranet access, Web browser, notepad, calendar, Personal Digital Assistant (PDA) equipped with a Global Positioning System (GPS) receiver;

[0056] (4) conventional laptop and / or handheld receivers;

[0057] (5) Conventional laptop and / or palmtop radiotelephone transceivers, etc.

[0058] Combination Figure 1 As shown, an electronic device 100 provided in an embodiment of the present application can be a mobile phone or a tablet computer. The type of the electronic device 100 is not limited here.

[0059] The electronic device 100 includes a housing 10. The housing 10 includes a front housing 11, a frame 12, and a back cover 13, wherein the front housing 11 and the back cover 13 are connected to opposite sides of the frame 12. In some embodiments, the frame 12 and the back cover 13 are integrally formed, that is, the frame 12 and the back cover 13 constitute an integral structural member. The front housing 11 and the frame 12 can be connected by snap-fit ​​connection or by hot melt adhesive. The connection method of the various components of the housing 10 is not limited here.

[0060] Combination Figure 2 As shown, the electronic device 100 includes a voice wake-up device 20, which is used to realize the function of voice wake-up of the electronic device 100. For example, when the electronic device 100 is in a locked screen or off screen state, the user can wake up the electronic device 100 through a wake-up word to unlock or light up the screen.

[0061] The voice wake-up device 20 includes a sound pickup tube 21, a voice recognition component 22, a friction electrode component 23, a rectifier circuit module 24, and a power management circuit module 25. The sound pickup tube 21 is provided with a sound pickup channel 211 and a sound pickup port 211a of the sound pickup channel 211. The sound pickup port 211a is an opening for the sound pickup channel 211 to communicate with the outside world, so that the sound from the outside world can be transmitted from the sound pickup channel 211 to the voice recognition component 22.

[0062] Continue to combine Figure 1 and Figure 3 As shown, in some embodiments, the housing 10 is provided with a through hole 10a, and the through hole 10a may be located in the frame 12. The sound pickup channel 211 is connected to the outside through the through hole 10a.

[0063] It should be noted that the sound pickup tube 21 can be a structure independent of the housing 10 of the electronic device 100. In some embodiments, the sound pickup tube 21 can also be a structure integrated with the housing 10 of the electronic device 100, that is, the sound pickup tube 21 is a part of the housing 10. In this case, the sound pickup tube 21 is integrally formed with the housing 10. This structure is simple and eliminates the need to install the sound pickup tube 21 on the housing 10.

[0064] The voice recognition component 22 is used to recognize the sound collected by the sound pickup channel 211. The friction electrode component 23 includes a first electrode sheet 231 and a second electrode sheet 232. The first electrode sheet 231 and the second electrode sheet 232 are arranged in the sound pickup channel 211. When the airflow flows through the sound pickup channel 211, the first electrode sheet 231 and the second electrode sheet 232 rub against each other under the drive of the airflow to generate current.

[0065] The rectifying circuit module 24 is electrically connected to the first electrode sheet 231 and the second electrode sheet 232. The rectifying circuit module 24 is used to rectify the current generated by the friction between the first electrode sheet 231 and the second electrode sheet 232.

[0066] For ease of understanding, the signal output by the rectifier circuit module 24 after rectifying the current generated by the friction of the first electrode sheet 231 and the second electrode sheet 232 is called an "electrical signal". Since the electrical signal is obtained by rectifying the current generated by the friction electrode assembly 23 through the rectifier circuit module 24, the electrical signal is associated with the current generated by the friction electrode assembly 23, and then the current generated by the friction electrode assembly 23 can be measured based on the electrical signal.

[0067] In the embodiment of the present application, the power management circuit module 25 is electrically connected to the voice recognition component 22 and the rectifier circuit module 24. The power management circuit module 25 is used to receive the electrical signal output by the rectifier circuit module 24, and control the power supply to supply power to the voice recognition component 22 when the electrical signal meets the preset conditions. In this way, the power supply does not need to supply power to the voice recognition component 22 all the time. When the user makes a voice, the sound airflow flows through the sound pickup channel 211 so that the first electrode sheet 231 and the second electrode sheet 232 rub against each other to generate current. The rectifier circuit module 24 rectifies the current and outputs an electrical signal. When the electrical signal output by the rectifier circuit module 24 meets the preset conditions, it triggers the power management circuit module 25 to control the power supply to supply power to the voice recognition component 22, so that the voice recognition component 22 can recognize the voice made by the user.

[0068] On the one hand, the solution of the present application can make it unnecessary for the power supply to supply power to the voice recognition component 22 all the time, thereby reducing the power consumption of the device. On the other hand, when the user speaks, the solution of the present application will prompt the power supply to supply power to the voice recognition component 22, so that the voice recognition component 22 can recognize the user's voice, thereby not missing the user's voice command. Therefore, the present solution can reduce the power consumption of the voice wake-up device 20 while taking into account the detection of the voice signal.

[0069] It should be noted that the electrical signal output by the rectifier circuit module 24 includes at least one of a current signal, a voltage signal and an electrical pulse signal.

[0070] For ease of understanding, the following will describe an implementation method when the electrical signal is a current signal in combination with the rectification principle of the rectification circuit module 24, but it does not mean that the electrical signal is limited to this.

[0071] The rectifier circuit in the rectifier circuit module 24 includes a diode, and the principle of rectification is to use the unidirectional conductivity of the diode to convert the alternating alternating current into a single-direction pulsating direct current. In some embodiments of the present application, when the electronic device 100 is awakened by voice, the user speaks near the sound pickup port 211a of the sound pickup channel 211, and the sound waves will push the airflow through the sound pickup channel 211, so that the airflow drives the first electrode sheet 231 and the second electrode sheet 232 to rub against each other and generate current. Since the airflow in the sound pickup channel 211 is not a constant airflow with a constant size and direction during speaking, the first electrode sheet 231 and the second electrode sheet 232 will rub repeatedly, thereby generating alternating current. After rectification by the rectifier circuit module 24, the current generated by the friction between the first electrode sheet 231 and the second electrode sheet 232 is rectified into direct current, so that the power management circuit module 25 controls whether the power supply supplies power to the voice recognition component 22 according to the size of the current rectified by the rectifier circuit module 24.

[0072] For example, when the current rectified by the rectifying circuit module 24 is within a preset current range, the power management circuit module 25 controls the power supply to supply power to the voice recognition component 22 .

[0073] In the embodiment of the present application, a first electrode sheet 231 and a second electrode sheet 232 are provided in the sound pickup channel 211, and the first electrode sheet 231 and the second electrode sheet 232 rub against each other when the airflow flows through the sound pickup channel 211 to generate current. Since the power management circuit module 25 is electrically connected to the voice recognition component 22 and the rectifier circuit module 24, when the current rectified by the rectifier circuit module 24 is within a preset current range, the power management circuit module 25 controls the power supply to supply power to the voice recognition component 22. In this way, there is no need to supply power to the voice recognition component 22 all the time. Only when the current rectified by the rectifier circuit module 24 is within a preset current range will the power management circuit module 25 be triggered to control the power supply to supply power to the voice recognition component 22, thereby reducing the power consumption of the voice wake-up device 20 while taking into account the detection of the voice signal.

[0074] It should be noted that the preset current range can be set according to the actual situation when the voice wake-up device 20 performs the wake-up function, so as to determine whether the voice wake-up device 20 needs to be activated by the magnitude of the current rectified by the rectifier circuit module 24. Activating the voice wake-up device 20 here means that the power supply supplies power to the voice recognition component 22, so that the voice recognition component 22 can normally recognize the sound collected by the sound pickup channel 211.

[0075] In some embodiments, when the voice wake-up device 20 is used to wake up the electronic device 100, the airflow flows through the sound pickup channel 211 so that the current generated by the friction between the first electrode sheet 231 and the second electrode sheet 232 is rectified by the rectifier circuit module 24 to be I 0 In this embodiment, I 0 The current is within the preset range. Thus, the power management circuit module 25 controls the power supply to the voice recognition component 22 , so that the voice recognition component 22 can normally recognize the sound collected by the sound pickup channel 211 .

[0076] It should be noted that the value of the preset current range is not limited here.

[0077] For ease of understanding, the preset current range is set to be greater than or equal to I 0 / 2, and less than or equal to I 0 The use principle of the voice wake-up device 20 of the present application is described by taking this as an example, but it does not mean that the preset current range is limited to this.

[0078] If the user does not speak near the sound pickup port 211a, no airflow flows through the sound pickup channel 211, or only a tiny airflow in nature flows through the sound pickup channel 211. At this time, the friction between the first electrode sheet 231 and the second electrode sheet 232 is small, and the current generated by the friction between the two is less than I after being rectified by the rectifier circuit module 24. 0 / 2, so the current rectified by the rectifying circuit module 24 is not within the preset current range, and then the power management circuit module 25 will not control the power supply to the voice recognition component 22, so that the voice recognition component 22 does not consume the power of the power supply, so as to achieve the effect of reducing the standby power consumption of the electronic device 100.

[0079] Accordingly, when the voice wake-up function is used, the airflow flows through the sound pickup channel 211, so that the current rectified by the rectifier circuit module 24 is greater than or equal to I 0 When the current rectified by the rectifying circuit module 24 is within the preset current range, the power management circuit module 25 controls the power supply to supply power to the voice recognition component 22 to ensure that the voice recognition component 22 can recognize the sound collected by the sound pickup channel 211.

[0080] It should be noted that the power source used to power the voice recognition component 22 may be the power source of the electronic device 100 .

[0081] For example, in some embodiments, the electronic device 100 further includes a battery 30. The battery 30 is disposed in the space enclosed by the housing 10. The battery 30 is electrically connected to the power management circuit module 25. In this embodiment, when the current rectified by the rectifier circuit module 24 is within a preset current range, the power management circuit module 25 controls the battery 30 to supply power to the voice recognition component 22. In other words, the power management circuit module 25 distributes voltage to the voice recognition component 22 under the power supply of the battery 30, so that the voice recognition component 22 can recognize the sound collected by the pickup channel 211.

[0082] Combination Figure 2 As shown, in some embodiments, the speech recognition component 22 includes a microphone 221, a codec 222, and an audio signal processor 223. The codec 222 is electrically connected between the microphone 221 and the audio signal processor 223. The microphone 221, the codec 222, and the audio signal processor 223 are all electrically connected to the power management circuit module 25.

[0083] It should be noted that the codec 222 can also be called a Codec module, which is a mixture of an encoder (i.e., an encoder module) and a decoder (i.e., a decoder module). In the audio system of the electronic device 100, the codec 222 is responsible for converting analog audio signals into digital signals, or converting digital signals back into analog signals, thereby ensuring that audio data can be efficiently transmitted and stored in digital devices.

[0084] The audio signal processor 223 may be an ADSP (Application-Specific Signal Processor). ADSP is a processor designed specifically for specific applications and is mainly used to process specific signal processing tasks, such as audio, video, and image processing. Compared with general-purpose processors (such as CPUs), ADSPs have higher efficiency and performance when processing specific tasks, can reduce power consumption and increase response speed. In the present application, the audio signal processor 223 adopts ADSP, which can be responsible for efficiently processing audio signals, ensuring audio quality and high-performance audio processing.

[0085] In the related art, in order to avoid missing the voice wake-up signal, components such as the microphone 221, the codec 222 and the audio signal processor 223 need to remain powered (ie, always on), resulting in continuous power consumption.

[0086] In the embodiment of the present application, since the microphone 221 , the codec 222 and the audio signal processor 223 are all electrically connected to the power management circuit module 25 , these devices are all controlled by the power management circuit module 25 .

[0087] In view of the fact that when the current rectified by the rectifying circuit module 24 is within the preset current range, the power management circuit module 25 controls the power supply to supply power to the voice recognition component 22. Therefore, when the current rectified by the rectifying circuit module 24 is not within the preset current range, these components of the voice recognition component 22 can be kept in a normally off state, thereby effectively reducing the standby power consumption, which is beneficial to improving the endurance performance of the electronic device 100. Accordingly, only when the current rectified by the rectifying circuit module 24 is within the preset current range, the power management circuit module 25 controls the power supply to supply power to these components in the voice recognition component 22, so as to ensure that the voice recognition component 22 can recognize the sound collected by the sound pickup channel 211.

[0088] It should be noted that the microphone 221 can be located in the sound collection channel 211 or at an end of the sound collection channel 211 away from the sound collection port 211a. As long as the microphone 221 can pick up external sounds from the sound collection port 211a through the sound collection channel 211, the location of the microphone 221 is not limited.

[0089] Combination Figure 4 As shown, the first electrode sheet 231 and the second electrode sheet 232 are provided with dust removal holes 23 a for filtering the gas flowing through the sound pickup channel 211 .

[0090] When the air flow flows through the dust removal hole 23a, the first electrode sheet 231 and the second electrode sheet 232 move relative to each other under the action of the air flow and generate current by friction. The rectifier circuit module 24 is electrically connected to the first electrode sheet 231 and the second electrode sheet 232. The rectifier circuit module 24 is used to collect the electrical energy generated by the friction between the first electrode sheet 231 and the second electrode sheet 232.

[0091] It should be noted that a first electrode sheet 231 and a second electrode sheet 232 having dust removal holes 23a are arranged in the sound pickup channel 211, so that the first electrode sheet 231 and the second electrode sheet 232 can filter and remove dust from the gas flowing through the sound pickup channel 211, and then the first electrode sheet 231 and the second electrode sheet 232 can provide dust-proof protection for the microphone 221 and reduce the impact force of the airflow on the microphone 221.

[0092] It should be noted that, in some embodiments, the sound pickup tube 21 may be a straight tube or a curved tube.

[0093] For example, combined with Figure 5 As shown, when the sound pickup tube 21 is a curved tube, the sound pickup channel 211 may include a first channel 2111 and a second channel 2112 that are interconnected. The first channel 2111 and the second channel 2112 are arranged at an angle. In this way, the direction of the airflow flowing from the first channel 2111 to the second channel 2112 will be changed, thereby achieving the effect of weakening the impact of the airflow on the diaphragm of the microphone 221.

[0094] The first channel 2111 and the second channel 2112 are perpendicular to each other, so as to optimize the flow direction of the sound pickup channel 211 , so as to reasonably set the position of the sound pickup port 211 a and the position of the microphone 221 .

[0095] In some embodiments, the length of the first channel 2111 is greater than the length of the second channel 2112 .

[0096] For a channel, the direction in which the airflow flows through the channel is the length direction of the channel, and then the length of the first channel 2111 can be understood as the length of the path along which the airflow flows along the first channel 2111; accordingly, the length of the second channel 2112 can be understood as the length of the path along which the airflow flows along the second channel 2112.

[0097] The first electrode sheet 231 and the second electrode sheet 232 are arranged in the first channel 2111 at intervals along the length direction of the first channel 2111. In this embodiment, the first electrode sheet 231 and the second electrode sheet 232 are arranged in the first channel 2111 with a relatively long size, so there is no problem of inconvenient arrangement of the friction electrode assembly 23 due to too cramped space.

[0098] In some embodiments, the first electrode sheet 231 and the second electrode sheet 232 are spaced 0.5 mm to 0.9 mm apart in the first channel 2111. For example, the first electrode sheet 231 and the second electrode sheet 232 are spaced 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm or 0.9 mm apart in the first channel 2111. Under this arrangement, the first electrode sheet 231 and the second electrode sheet 232 are not spaced too large to generate electricity by friction with each other, nor are they spaced too small to cause relative movement between them. Understandably, too small a relative movement space between the first electrode sheet 231 and the second electrode sheet 232 is not conducive to improving the efficiency of frictional power generation.

[0099] Combination Figure 6 As shown, in some embodiments, the angle a between the thickness direction of the first electrode sheet 231 and the length direction of the first channel 2111 is 0° to 15°. For example, the angle a between the thickness direction of the first electrode sheet 231 and the length direction of the first channel 2111 is 0°, 2°, 5°, 9°, 10° or 15°.

[0100] The angle b between the thickness direction of the second electrode sheet 232 and the length direction of the first channel 2111 is 0° to 15°. For example, the angle b between the thickness direction of the second electrode sheet 232 and the length direction of the first channel 2111 is 0°, 2°, 5°, 9°, 10° or 15°.

[0101] In the above embodiment, setting the first electrode sheet 231 or the second electrode sheet 232 at this angle can ensure that the effective windward surface of the first electrode sheet 231 or the second electrode sheet 232 in the sound pickup channel 211 is large, so that the airflow can be buffered when flowing through the dust removal hole 23a, thereby helping to enhance the protection effect of the diaphragm of the microphone 221.

[0102] There are many possibilities for disposing the first electrode sheet 231 and the second electrode sheet 232 in the sound pickup channel 211 , as long as the relative movement of the first electrode sheet 231 and the second electrode sheet 232 can be used to generate current by friction.

[0103] For example, in some embodiments, all edges of the first electrode sheet 231 and all edges of the second electrode sheet 232 are connected to the inner wall of the first channel 2111. When the airflow flows through the dust removal hole 23a, the first electrode sheet 231 and the second electrode sheet 232 move relative to each other along the thickness direction of the first electrode sheet 231 and collide with each other, thereby generating current by friction.

[0104] For example, combining Figure 7 and Figure 8 As shown, the first electrode sheet 231 and the second electrode sheet 232 are stacked and contacted with each other. When the airflow flows through the dust removal hole 23a, the first electrode sheet 231 and the second electrode sheet 232 remain in contact and the contact area between them increases or decreases under the disturbance of the airflow. Since the first electrode sheet 231 and the second electrode sheet 232 remain in contact, when the contact area between them increases or decreases, the first electrode sheet 231 and the second electrode sheet 232 move by friction with each other, thereby generating electric energy.

[0105] Furthermore, the inner wall of the sound pickup channel 211 is provided with a first connection portion 211b and a second connection portion 211c. The first connection portion 211b and the second connection portion 211c are staggered with each other around the length direction of the sound pickup channel 211. Part of the edge of the first electrode sheet 231 is connected to the first connection portion 211b, and part of the edge of the second electrode sheet 232 is connected to the second connection portion 211c. When the airflow flows through the dust removal hole 23a, the first electrode sheet 231 and the second electrode sheet 232 swing relative to the first connection portion 211b and the second connection portion 211c, respectively, so that the contact area between the first electrode sheet 231 and the second electrode sheet 232 becomes larger or smaller, so that the first electrode sheet 231 and the second electrode sheet 232 rub against each other to generate electrical energy.

[0106] It can be understood that the material of the first electrode sheet 231 and the second electrode sheet 232 is a material that can generate electricity through friction, or the surfaces of the first electrode sheet 231 and the second electrode sheet 232 are coated with a layer of material that can generate electricity through friction.

[0107] The triboelectric material includes but is not limited to nylon and polytetrafluoroethylene. It is understandable that the first electrode sheet 231 and the second electrode sheet 232 generate positive and negative charges respectively when rubbing against each other to act as the positive electrode and the negative electrode, so that the rectifier circuit module 24 can rectify the current generated by the flow of charges when connecting the first electrode sheet 231 and the second electrode sheet 232.

[0108] In some implementations, the electrical signal may also include a voltage signal or an electrical pulse signal. In order to facilitate understanding of the use principle of the voice wake-up device 20, the control method thereof may be further described below.

[0109] Combination Fig.10 As shown, another aspect of the present application provides a control method for a voice wake-up device 20, and the voice wake-up device 20 may include a sound pickup tube 21, a voice recognition component 22, a friction electrode component 23, a rectifier circuit module 24, and a power management circuit module 25 in the embodiment of the present application. The sound pickup tube 21 is provided with a sound pickup channel 211, and the friction electrode component 23 includes a first electrode sheet 231 and a second electrode sheet 232. The first electrode sheet 231 and the second electrode sheet 232 are provided in the sound pickup channel 211, and are used to rub against each other when the airflow flows through the sound pickup channel 211 to generate current. The rectifier circuit module 24 is used to rectify the current generated by the friction between the first electrode sheet 231 and the second electrode sheet 232, and output an electrical signal. The power management circuit module 25 is electrically connected to the voice recognition component 22 and the rectifier circuit module 24.

[0110] The control method of the voice wake-up device 20 provided in this embodiment may include the following steps:

[0111] In step S102 , the power management circuit module 25 receives the electrical signal output by the rectifier circuit module 24 .

[0112] Step S104 , when the electrical signal meets a preset condition, the power management circuit module 25 controls the power supply to supply power to the voice recognition component 22 , so that the voice recognition component 22 recognizes the sound collected through the sound pickup channel 211 .

[0113] In this embodiment, the power supply does not need to supply power to the voice recognition component 22 all the time. When the user makes a voice, the sound airflow flows through the pickup channel 211 so that the first electrode sheet 231 and the second electrode sheet 232 rub against each other to generate a current. When the current generated by the friction between the first electrode sheet 231 and the second electrode sheet 232 reaches a preset condition after the electrical signal rectified by the rectifier circuit module 24, the power management circuit module 25 will be triggered to control the power supply to supply power to the voice recognition component 22, so that the voice recognition component 22 can recognize the voice made by the user. On the one hand, the scheme of the present application can make it unnecessary for the power supply to supply power to the voice recognition component 22 all the time, thereby reducing the power consumption of the device. On the other hand, when the user makes a voice, the scheme of the present application will prompt the power supply to supply power to the voice recognition component 22, so that the voice recognition component 22 can recognize the user's voice, so as not to miss the user's voice command. Therefore, this scheme can reduce the power consumption of the voice wake-up device 20 while taking into account the detection of the voice signal.

[0114] In this embodiment, the electrical signal includes at least one of a current signal, a voltage signal and an electrical pulse signal.

[0115] Taking the electrical signal including a current signal as an example, when the corresponding current value in the current signal is within a preset current range, the power management circuit module 25 controls the power supply to supply power to the voice recognition component 22 .

[0116] Taking the electrical signal including a voltage signal as an example, when the corresponding voltage value in the voltage signal is within a preset voltage range, the power management circuit module 25 controls the power supply to supply power to the voice recognition component 22 .

[0117] Taking the electrical signal including an electrical pulse signal as an example, when at least one of the pulse width, pulse period, pulse repetition frequency, peak power and average power of the electrical pulse signal is within a preset range, the power management circuit module 25 controls the power supply to the voice recognition component 22.

[0118] It should be noted here that whether the electrical signal meets the preset conditions is not limited to judging the single indicator of the current signal, voltage signal or electric pulse signal mentioned above. In some embodiments, it is also possible to judge by combining at least two of the current signal, voltage signal or electric pulse signal to improve the control accuracy of the power management circuit module 25 controlling the power supply to the voice recognition component 22, thereby reducing the misjudgment caused by the airflow in the environment entering the sound pickup channel 211, resulting in the environmental sound erroneously triggering the power supply to the voice recognition component 22 when the user does not make a voice.

[0119] For example, in some embodiments, the electrical signal includes a current signal and a voltage signal. When the corresponding current value in the current signal is within a preset current range and the corresponding voltage value in the voltage signal is within a preset voltage range, the power management circuit module 25 controls the power supply to supply power to the voice recognition component 22.

[0120] For another example, in some embodiments, the electrical signal includes a current signal and an electrical pulse signal. When the corresponding current value in the current signal is within a preset current range, and at least one of the pulse width, pulse period, pulse repetition frequency, peak power and average power of the electrical pulse signal is within a preset range, the power management circuit module 25 controls the power supply to supply power to the voice recognition component 22.

[0121] For another example, in some embodiments, the electrical signal includes a voltage signal and an electrical pulse signal. When the corresponding voltage value in the voltage signal is within a preset voltage range, and at least one of the pulse width, pulse period, pulse repetition frequency, peak power and average power of the electrical pulse signal is within a preset range, the power management circuit module 25 controls the power supply to the voice recognition component 22.

[0122] refer to Fig.11 , Fig.11 The electronic device 100 is a schematic diagram of the structure of the electronic device 100 provided in the embodiment of the present application. The electronic device 100 may include a radio frequency (RF) circuit 501, a memory 502 including one or more computer-readable storage media, an input unit 503, a display unit 504, a sensor 505, an audio circuit 506, a wireless fidelity (WiFi) module 507, a processor 508 including one or more processing cores, and a power supply 509. Those skilled in the art can understand that Fig.11 The structure of the electronic device 100 shown in the figure does not constitute a limitation on the electronic device 100, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0123] The radio frequency circuit 501 can be used to send and receive information, or receive and send signals during a call. In particular, after receiving the downlink information of the base station, it is handed over to one or more processors 508 for processing; in addition, the data related to the uplink is sent to the base station. Generally, the radio frequency circuit 501 includes but is not limited to an antenna, at least one amplifier, a tuner, one or more oscillators, a subscriber identity module (SIM) card, a transceiver, a coupler, a low noise amplifier (LNA), a duplexer, etc. In addition, the radio frequency circuit 501 can also communicate with the network and other devices through wireless communication. The wireless communication can use any communication standard or protocol, including but not limited to the Global System of Mobile Communication (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), email, Short Messaging Service (SMS), etc.

[0124] The memory 502 can be used to store applications and data. The applications stored in the memory 502 include executable codes. The applications can be composed of various functional modules. The processor 508 executes various functional applications and data processing by running the applications stored in the memory 502. The memory 502 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area can store data created according to the use of the electronic device 100 (such as audio data, a phone book, etc.), etc. In addition, the memory 502 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage devices. Accordingly, the memory 502 can also include a memory controller to provide the processor 508 and the input unit 503 with access to the memory 502.

[0125] The input unit 503 can be used to receive input digital, character information or user feature information (such as fingerprints), and generate keyboard, mouse, joystick, optical or trackball signal input related to user settings and function control. Specifically, in a specific embodiment, the input unit 503 may include a touch-sensitive surface and other input devices. The touch-sensitive surface, also known as a touch display screen or a touch pad, can collect user touch operations on or near it (such as operations performed by users using fingers, styluses, or any other suitable objects or accessories on or near the touch-sensitive surface), and drive corresponding connection devices according to a pre-set program. Optionally, the touch-sensitive surface may include a touch detection device and a touch controller. Among them, the touch detection device detects the user's touch orientation, detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into touch point coordinates, and then sends it to the processor 508, and can receive and execute commands sent by the processor 508.

[0126] The display unit 504 may be used to display information input by the user or provided to the user and various graphical user interfaces of the electronic device 100, which may be composed of graphics, text, icons, videos, and any combination thereof. The display unit 504 may include the above-mentioned liquid crystal panel.

[0127] Furthermore, the touch-sensitive surface may cover a liquid crystal panel. When the touch-sensitive surface detects a touch operation on or near it, it is transmitted to the processor 508 to determine the type of touch event. The processor 508 then provides corresponding visual output on the liquid crystal panel according to the type of touch event.

[0128] Although in Fig.11In the embodiment, the touch sensitive surface and the liquid crystal panel are used as two independent components to realize input and output functions, but in some embodiments, the touch sensitive surface and the liquid crystal panel can be integrated to realize input and output functions. It can be understood that the screen can include an input unit 503 and a display unit 504.

[0129] The electronic device 100 may also include at least one sensor 505, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor may include an ambient light sensor and a proximity sensor, wherein the ambient light sensor may adjust the brightness of the liquid crystal panel according to the brightness of the ambient light, and the proximity sensor may turn off the liquid crystal panel and / or the backlight when the electronic device 100 is moved to the ear. As a type of motion sensor, the gravity acceleration sensor can detect the magnitude of acceleration in each direction (generally three axes), and can detect the magnitude and direction of gravity when stationary. It can be used for applications that identify the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, tapping), etc.; as for other sensors such as gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc. that can also be configured in the electronic device 100, they will not be repeated here.

[0130] The audio circuit 506 can provide an audio interface between the user and the electronic device 100 through a speaker and a microphone. The audio circuit 506 can convert the received audio data into an electrical signal, transmit it to the speaker, and convert it into a sound signal for output; on the other hand, the microphone converts the collected sound signal into an electrical signal, which is received by the audio circuit 506 and converted into audio data, and then the audio data is output to the processor 508 for processing, and then sent to another electronic device 100 through the radio frequency circuit 501, or the audio data is output to the memory 502 for further processing. The audio circuit 506 may also include an earphone socket to provide communication between an external earphone and the electronic device 100.

[0131] Wireless Fidelity (WiFi) is a short-range wireless transmission technology. The electronic device 100 can help users send and receive emails, browse web pages, and access streaming media through the wireless fidelity module 507, which provides users with wireless broadband Internet access. Fig.11 The wireless fidelity module 507 is shown, but it is understandable that it is not a necessary component of the electronic device 100 and can be omitted as needed without changing the essence of the invention.

[0132] The processor 508 is the control center of the electronic device 100. It uses various interfaces and lines to connect various parts of the entire electronic device 100. By running or executing applications stored in the memory 502 and calling data stored in the memory 502, it executes various functions of the electronic device 100 and processes data, thereby monitoring the electronic device 100 as a whole. Optionally, the processor 508 may include one or more processing cores; preferably, the processor 508 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, and application programs, and the modem processor mainly processes wireless communications. It is understandable that the above-mentioned modem processor may not be integrated into the processor 508.

[0133] The electronic device 100 also includes a power supply 509 for supplying power to various components. Preferably, the power supply 509 can be logically connected to the processor 508 through a power management system, so that the power management system can manage charging, discharging, and power consumption management. The power supply 509 can also include one or more DC or AC power supplies, recharging systems, power failure detection circuits, power converters or inverters, power status indicators, and other arbitrary components.

[0134] although Fig.11 Not shown, the electronic device 100 may also include a Bluetooth module, etc., which will not be described in detail here. In specific implementation, the above modules can be implemented as independent entities, or can be arbitrarily combined and implemented as the same or several entities. The specific implementation of the above modules can refer to the previous method embodiment, which will not be described in detail here.

[0135] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0136] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0137] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0138] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0139] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0140] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0141] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the inventive concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A voice wake-up device, characterized in that: include: A sound pickup tube, provided with a sound pickup channel; A speech recognition component, used for recognizing the sound collected through the sound pickup channel; A friction electrode assembly, comprising a first electrode sheet and a second electrode sheet, wherein the first electrode sheet and the second electrode sheet are arranged in the sound pickup channel and are used to generate current by friction with each other when air flows through the sound pickup channel; a rectifier circuit module, electrically connected to the first electrode sheet and the second electrode sheet, the rectifier circuit module being used to rectify the current generated by the friction between the first electrode sheet and the second electrode sheet, and output an electrical signal; A power management circuit module is electrically connected to the voice recognition component and the rectifier circuit module. The power management circuit module is used to receive the electrical signal output by the rectifier circuit module and control the power supply to supply power to the voice recognition component when the electrical signal meets a preset condition.

2. The voice wake-up device according to claim 1, characterized in that: The electrical signal includes at least one of a current signal, a voltage signal, and an electrical pulse signal.

3. The voice wake-up device according to claim 1, characterized in that: The speech recognition component includes a microphone, a codec and an audio signal processor. The microphone is located in the sound pickup channel or at one end of the sound pickup channel. The codec is electrically connected between the microphone and the audio signal processor. The microphone, the codec and the audio signal processor are all electrically connected to the power management circuit module.

4. The voice wake-up device according to any one of claims 1 to 3, characterized in that: The first electrode sheet and the second electrode sheet are provided with dust removal holes for filtering the gas flowing through the sound pickup channel, and when the air flows through the dust removal holes, the first electrode sheet and the second electrode sheet move relative to each other under the action of the air flow and generate current through friction.

5. The voice wake-up device according to claim 4, characterized in that: The sound pickup channel comprises a first channel and a second channel which are connected to each other, and the first channel and the second channel are arranged at an angle.

6. The voice wake-up device according to claim 5, characterized in that: The length of the first channel is greater than that of the second channel, and the first electrode sheet and the second electrode sheet are arranged in the first channel at intervals along the length direction of the first channel.

7. The voice wake-up device according to claim 6, characterized in that: The first electrode sheet and the second electrode sheet are spaced apart from each other in the first channel by 0.5 mm to 0.9 mm; And / or, an angle between a thickness direction of at least one of the first electrode sheet and the second electrode sheet and a length direction of the first channel is 0° to 15°.

8. The voice wake-up device according to claim 6, characterized in that: All edges of the first electrode sheet and all edges of the second electrode sheet are connected to the inner wall of the first channel. When air flows through the dust removal hole, the first electrode sheet and the second electrode sheet move relative to each other along the thickness direction of the first electrode sheet and collide with each other, thereby generating current by friction.

9. The voice wake-up device according to claim 4, characterized in that: The first electrode sheet and the second electrode sheet are stacked and in contact with each other. When airflow flows through the dust removal hole, the first electrode sheet and the second electrode sheet remain in contact with each other and their contact areas increase or decrease under the disturbance of the airflow.

10. The voice wake-up device according to claim 9, characterized in that: The inner wall of the sound pickup channel is provided with a first connecting part and a second connecting part, the first connecting part and the second connecting part are staggered with each other around the length direction of the sound pickup channel, a part of the edge of the first electrode sheet is connected to the first connecting part, and a part of the edge of the second electrode sheet is connected to the second connecting part, when the airflow flows through the dust removal hole, the first electrode sheet and the second electrode sheet swing relative to the first connecting part and the second connecting part respectively, so that the contact area between the first electrode sheet and the second electrode sheet becomes larger or smaller.

11. A method for controlling a voice wake-up device, characterized in that: The voice wake-up device includes a sound pickup tube, a voice recognition component, a friction electrode component, a rectifier circuit module and a power management circuit module. The sound pickup tube is provided with a sound pickup channel. The friction electrode component includes a first electrode sheet and a second electrode sheet. The first electrode sheet and the second electrode sheet are provided in the sound pickup channel and are used to rub against each other when air flows through the sound pickup channel to generate current. The rectifier circuit module is used to rectify the current generated by the friction between the first electrode sheet and the second electrode sheet and output an electrical signal. The power management circuit module is electrically connected to the voice recognition component and the rectifier circuit module. The method includes: The power management circuit module receives the electrical signal output by the rectifier circuit module; When the electrical signal meets a preset condition, the power management circuit module controls the power supply to supply power to the voice recognition component, so that the voice recognition component recognizes the sound collected through the sound pickup channel.

12. The control method according to claim 11, characterized in that: The electrical signal includes a current signal, and when the current value corresponding to the current signal is within a preset current range, the power management circuit module controls the power supply to supply power to the voice recognition component; Alternatively, the electrical signal includes a voltage signal, and when a voltage value corresponding to the voltage signal is within a preset voltage range, the power management circuit module controls the power supply to supply power to the speech recognition component; Alternatively, the electrical signal includes an electrical pulse signal, and when at least one of the pulse width, pulse period, pulse repetition frequency, peak power and average power of the electrical pulse signal is within a preset range, the power management circuit module controls the power supply to supply power to the voice recognition component.

13. The control method according to claim 11, characterized in that: The electrical signal includes a current signal and a voltage signal. When the current value corresponding to the current signal is within a preset current range, and the voltage value corresponding to the voltage signal is within a preset voltage range, the power management circuit module controls the power supply to supply power to the voice recognition component. Alternatively, the electrical signal includes a current signal and an electrical pulse signal, and when the current value corresponding to the current signal is within a preset current range, and at least one of the pulse width, pulse period, pulse repetition frequency, peak power and average power of the electrical pulse signal is within a preset range, the power management circuit module controls the power supply to supply power to the voice recognition component; Alternatively, the electrical signal includes a voltage signal and an electrical pulse signal. When the corresponding voltage value in the voltage signal is within a preset voltage range, and at least one of the pulse width, pulse period, pulse repetition frequency, peak power and average power of the electrical pulse signal is within a preset range, the power management circuit module controls the power supply to supply power to the voice recognition component.

14. An electronic device, characterized in that: It comprises a shell and a voice wake-up device as described in any one of claims 1 to 10, wherein the voice wake-up device is arranged in the shell, the shell is provided with a through hole, and the sound pickup channel is connected to the outside through the through hole.

15. The electronic device according to claim 14, characterized in that: The sound pickup tube of the voice wake-up device is integrally formed with the shell.

16. The electronic device according to claim 14 or 15, characterized in that: It includes a battery, which is arranged in the space enclosed by the shell and is electrically connected to the power management circuit module.

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