Device wake-up circuit

Abstract

The embodiment of the invention provides an equipment wake-up circuit, and relates to the technical field of batteries. The device is characterized in that an MCU is connected with a power supply through a control circuit, and when the control circuit does not receive a second high level signal sent by a signal processor, a disconnection state is kept, so that energy consumption possibly brought by the MCU when equipment is not awakened is reduced; and meanwhile, the signal acquisition module, the signal preprocessing module and the power supply are directly connected in series, so that a normally open state is kept, and when an interaction signal meeting conditions is received, a first high-level signal is generated, so that the signal processor triggers the control circuit to be connected, and the effect of awakening the MCU is achieved. The method provided by the invention effectively solves the problem of high energy consumption caused by the fact that the MCU is kept in the non-power-off mode when the whole equipment is in the dormant state in the equipment awakening function in the related technology.

Description

Technical Field

[0001] The present application relates to the field of intelligent device control technology, and in particular to a device wake-up circuit. Background Art

[0002] Various smart devices, new energy vehicles equipped with intelligent systems, robots and other equipment are often equipped with the function of waking up the device host through specific wake-up words when the device is in sleep mode, or waking up the device through specific gestures, facial recognition, etc.

[0003] In related technologies, device wake-up requires that the MCU of the device host must be in a non-power-off mode to recognize the corresponding wake-up signal, which causes the MCU to continuously consume power and waste the overall energy of the device. Summary of the Invention

[0004] The present application provides a device wake-up circuit to solve the problem in the related art that the device wake-up function requires the MCU to remain in a non-power-off mode when the entire device is in a sleep state, resulting in high energy consumption.

[0005] In a first aspect, the present application provides a device wake-up circuit, comprising:

[0006] Signal acquisition module, signal preprocessing module, signal processor, control circuit, MCU and power supply;

[0007] The signal acquisition module is connected in series with the signal preprocessing module and the power supply and is in a continuously turned-on state. The signal preprocessing module is connected to the input end of the signal processor, and the output end of the signal processor is connected to the control circuit. The two ends of the control circuit are connected to the MCU and the power supply respectively.

[0008] The signal acquisition module is used to receive the interactive signal and transmit it to the signal preprocessing module. The signal preprocessing module is used to extract the characteristics of the interactive signal and send a first high-level signal to the signal processor when the characteristics meet the set conditions. The signal processor is used to output a corresponding second high-level signal to the control circuit based on the first high-level signal. The control circuit is used to connect the MCU to the power supply and wake up the MCU when receiving the second high-level signal. Wake-up is used to indicate that the MCU is switched from a non-working state to a working state. When the control circuit does not receive the second high-level signal, it is in a disconnected state.

[0009] In one embodiment of the present disclosure, the signal processor is connected to the power supply, and the output end of the signal processor is connected to the input end of the control circuit through a diode or a MOS transistor;

[0010] The signal processor is used to output a low-level signal to the control circuit when it does not receive the first high-level signal output by the signal preprocessing module. When the signal received at the input end of the control circuit is a low-level signal, the control circuit remains in a disconnected state.

[0011] In one embodiment of the present disclosure, the MCU is connected to the input end of the control circuit through a diode, and the MCU is configured to send a second high-level signal to the input end of the control circuit when in a working state.

[0012] In one embodiment of the present disclosure, the MCU is connected to the input end of the signal processor, and the MCU is used to send a low-level signal to the signal processor when it needs to enter a sleep state. The signal processor is used to input a low-level signal to the control circuit based on the low-level signal, and the control circuit is used to switch to a disconnected state based on the received low-level signal.

[0013] In one embodiment of the present disclosure, the MCU is communicatively connected to the signal pre-processing module;

[0014] The signal preprocessing module is used to preprocess the interactive signal and send the preprocessed interactive signal to the MCU. The MCU is used to receive the preprocessed interactive signal when it is in a working state.

[0015] In one embodiment of the present disclosure, the signal preprocessing module is connected to the MCU and the signal processor via a filtering circuit.

[0016] In one embodiment of the present disclosure, the signal acquisition module is a voice acquisition module, and the signal pre-processing module is an audio processing module; or,

[0017] The signal acquisition module is an image acquisition module, and the signal preprocessing module is an image processing module; or,

[0018] The signal acquisition module is an infrared processing module, and the signal preprocessing module is an infrared data processing module.

[0019] In one embodiment of the present disclosure, the signal processor is a latch, a timer, or a signal trigger that pre-stores signal correspondences.

[0020] In one embodiment of the present disclosure, when the signal processor is a latch, the signal processor is connected to the signal preprocessing module and the MCU through two different input terminals respectively.

[0021] In one embodiment of the present disclosure, if the signal output by the signal preprocessing module is a universal asynchronous receiver / transmitter signal, the signal preprocessing module is connected to the signal processor and the MCU respectively through output lines, and the MCU is connected to the input end of the signal preprocessing module through an input line.

[0022] The device wake-up circuit provided by the embodiment of the present disclosure connects the MCU and the power supply with a control circuit, and maintains the disconnected state when the control circuit does not receive the second high-level signal sent by the signal processor, thereby reducing the energy consumption that may be caused by the MCU when the device is not awakened; at the same time, by directly connecting the signal acquisition module and the signal preprocessing module in series with the power supply, they are kept in a normally open state, and when receiving an interactive signal that meets the conditions, the signal processor triggers the control circuit to be connected by generating a first high-level signal, thereby achieving the effect of waking up the MCU. Therefore, when the device is not awakened, it is only necessary to maintain the operation of the signal acquisition module and the signal preprocessing module, avoiding frequent startup of the MCU and improving energy utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0024] Figure 1 A diagram of an application scenario of the device wake-up circuit provided in an embodiment of the present disclosure;

[0025] Figure 2 A schematic diagram of the structure of a device wake-up circuit provided in one embodiment of the present disclosure;

[0026] Figure 3 A schematic structural diagram of a device wake-up circuit provided in yet another embodiment of the present disclosure.

[0027] in,

[0028] 200. Device wake-up circuit;

[0029] 210. Signal acquisition module, 220. Signal preprocessing module, 221. Filter circuit, 230. Signal processor, 240. Control circuit, 250. Power supply, 251. Power conversion circuit, 252. Power connector.

[0030] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0031] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0032] Various smart devices, new energy vehicles equipped with intelligent systems, robots, and other equipment often have the function of waking up the device host through a specific wake-up word when the entire device is in a dormant state, or waking up the device through specific gestures, facial recognition, etc. In practice, this function is to configure a normally open acquisition device to collect signals, and the MCU receives and processes the signals to determine whether they are wake-up signals. If it is determined to be a wake-up signal, it will send a signal to other parts of the device to switch them to the working state.

[0033] Therefore, in related technologies, device wake-up requires that the MCU, acquisition equipment, signal pre-processing equipment and other parts in the device host must be in a normally open mode to identify the corresponding wake-up signal, which causes the MCU to continuously consume power and waste the overall energy of the device.

[0034] The device wake-up circuit provided in this application maintains the MCU in a disconnected state during sleep, and then the signal pre-processing module performs signal recognition and triggers the MCU to wake up. This reduces the overall power consumption of the device during sleep.

[0035] Figure 1 The application scenario diagram of the device wake-up circuit provided in this application is as follows: Figure 1 As shown, during the device wake-up process, the user 100 sends an interactive signal to the device wake-up circuit 200 set in the smart device 110. When the device wake-up circuit 200 recognizes that the interactive signal is a set wake-up signal, it triggers the wake-up action of the smart device 110, thereby realizing the device wake-up process.

[0036] It should be noted that Figure 1 The scenario shown includes only one or a specific number of users, smart devices, and device wake-up circuits for illustration, but the present disclosure is not limited to this. That is, the number of users, smart devices, and device wake-up circuits can be arbitrary.

[0037] The following specific embodiments describe in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0038] Figure 2 The schematic diagram of the device wake-up circuit provided in this application is as follows: Figure 2 As shown, the device includes:

[0039] Signal acquisition module 210, signal pre-processing module 220, signal processor 230, control circuit 240, MCU and power supply 250;

[0040] The signal acquisition module 210 is connected in series with the signal preprocessing module 220 and the power supply 250 and is in a continuously turned-on state. The signal preprocessing module is connected to the input end of the signal processor 230, and the output end of the signal processor 230 is connected to the control circuit 240. The two ends of the control circuit 240 are respectively connected to the MCU and the power supply 250;

[0041] The signal acquisition module 210 is used to receive the interactive signal and transmit it to the signal preprocessing module 220. The signal preprocessing module 220 is used to extract the characteristics of the interactive signal and, when the characteristics meet the set conditions, send a first high-level signal to the signal processor 230. The signal processor 230 is used to output a corresponding second high-level signal to the control circuit 240 based on the first high-level signal. The control circuit 240 is used to connect the MCU to the power supply 250 and wake up the MCU when receiving the second high-level signal. Wake-up is used to indicate that the MCU is switched from a non-working state to a working state. When the control circuit 240 does not receive the second high-level signal, it is in a disconnected state.

[0042] Specifically, the device wake-up circuit 200 can be applied to various types of smart devices, such as smart robots, new energy vehicles, smart home devices, etc. When such smart devices do not need to work, the entire device can be put into a sleep state, and a device wake-up circuit 200 can be configured therein so that when the device wake-up circuit 200 receives a wake-up signal, the device can be switched from the sleep state to the working state. For example, a household sweeping robot can be configured with the device wake-up circuit 200. When it receives a set voice wake-up signal (such as a pre-set wake-up term "the robot starts sweeping the floor"), the device wake-up circuit 200 will trigger the household sweeping robot as a whole, switch to the working state, and can act according to preset instructions, or be in a state of waiting to receive instructions, so that it can directly perform corresponding actions after receiving subsequent instructions.

[0043] Therefore, the MCU in the device wake-up circuit 200 is electrically connected to other parts of the smart device body, or the MCU is electrically connected to a main controller configured separately for the smart device, so as to send a startup signal to the connected devices through the MCU to switch all these devices to the working state.

[0044] Device wake-up circuit 200 includes a separate power supply 250, which can be a battery shared with other components of the smart device or a separate power supply module. Power supply 250 continuously supplies power to signal preprocessing module 220 and signal acquisition module 210, keeping them in a normally-on state (i.e., continuously on state. Conventional wake-up functions also require the signal acquisition and processing components to be continuously on to complete signal acquisition and processing).

[0045] The signal acquisition module 210 is used to collect the wake-up signal sent by the user, that is, the interactive signal, such as the audio signal (in this case, the signal acquisition module 210 is an audio signal collector, such as a microphone) and the image signal (in this case, the signal acquisition module 210 is an image collector, such as a camera).

[0046] The signal preprocessing module 220 is a part that can perform preliminary processing on the signal collected by the signal acquisition module 210. For example, the signal preprocessing module 220 can extract the characteristics of the interactive signal, such as audio characteristics (such as spectral characteristics) or image characteristics (such as color characteristics). At this time, the user can pre-configure the wake-up signal so that the MCU or the device main controller can analyze and process the pre-recorded wake-up signal, extract its characteristics, and send the characteristics to the signal preprocessing module 220, so that after the signal preprocessing module 220 extracts the interactive signal characteristics, it can compare them with the pre-received wake-up signal characteristics. When the corresponding set conditions are met (such as when the comparison result is that the similarity between the interactive signal characteristics and the wake-up signal characteristics is greater than 90%, the interactive signal is confirmed as a wake-up signal), it will output a first high-level signal to trigger the subsequent wake-up action.

[0047] Unlike existing signal preprocessing techniques, which typically involve simple amplification, noise reduction, and filtering, the signal preprocessing module 220 in this solution performs preliminary signal feature extraction and compares it with preset conditions. Specifically, this can be achieved by combining filters, comparators, and other structures to identify the frequency of interactive signals based on the preset voice wake-up signal frequency, or by combining photodiodes, amplifiers, and filters to identify the color features of interactive signals based on the preset color features of image wake-up signals.

[0048] This type of circuit structure can complete simple audio, image or infrared feature recognition without the need for an MCU. There are many very mature existing solutions in this field, and its specific circuit structure is not protected by this solution, so it will not be further explained here. Those skilled in the art can select the corresponding circuit structure as the signal preprocessing module 220 according to the type and characteristics of the wake-up signal to be identified, and perform signal preprocessing and identification.

[0049] This type of simple feature recognition implemented by the circuit structure can identify whether the interactive signal is a wake-up signal, so that when the signal is identified as a wake-up signal, a corresponding high-level signal, that is, a first high-level signal, is output to the signal processor 230 to trigger a subsequent wake-up action.

[0050] Since the MCU participates in the recognition of wake-up signals, it can significantly reduce the energy consumption of the device's wake-up-related components and improve the device's energy utilization efficiency.

[0051] The signal processor 230 is a structure that can output different types of signals according to the type of signal output by the signal preprocessing module 220. For example, when the signal preprocessing module 220 inputs a low-level signal or no signal to the signal processor 230, the signal processor 230 can continue to output a low-level signal to the control circuit 240; and when the signal preprocessing module 220 outputs a first high-level signal to the signal processor 230, the signal processor 230 can output a corresponding second high-level signal to the control circuit 240 (the first high-level signal and the second high-level signal can have the same voltage or different voltages. For example, if the voltages required by the input terminals of the signal processor 230 and the control circuit 240 are different, the voltages of the first high-level signal and the second high-level signal can be different).

[0052] The signal processor 230 can be implemented using a simple trigger, or a latch, a timer, or other structures, all of which can achieve the same effect.

[0053] The control circuit 240 is used to control the connection and disconnection between the MCU and the power supply 250 according to the level of the input signal. For example, the control circuit 240 can be provided with a MOS tube or a transistor so that when a high-level signal (i.e., the second high-level signal) is input, the two ends of the control circuit 240 are turned on, and when a low-level signal is input, the two ends of the control circuit 240 are turned off.

[0054] When both ends of the control circuit 240 are connected, the power supply 250 can directly power the MCU, thereby waking up the MCU and switching the MCU to a working state. The MCU can then wake up other components in the smart device, completing the wake-up process of the entire device.

[0055] The device wake-up circuit provided by the embodiment of the present disclosure connects the MCU and the power supply with a control circuit, and maintains the disconnected state when the control circuit does not receive the second high-level signal sent by the signal processor, thereby reducing the energy consumption that may be caused by the MCU when the device is not awakened; at the same time, by directly connecting the signal acquisition module and the signal preprocessing module in series with the power supply, they are kept in a normally open state, and when receiving an interactive signal that meets the conditions, the signal processor triggers the control circuit to be connected by generating a first high-level signal, thereby achieving the effect of waking up the MCU. Therefore, when the device is not awakened, it is only necessary to maintain the operation of the signal acquisition module and the signal preprocessing module, avoiding frequent startup of the MCU and improving energy utilization efficiency.

[0056] like Figure 3 As shown, it is a schematic diagram of the device wake-up circuit structure provided by another embodiment of the present disclosure, in Figure 2 On the basis of, the device wake-up circuit 200 may further include:

[0057] The signal processor 230 is connected to the power supply 250, and the output end of the signal processor 230 is connected to the input end of the control circuit 240 through a diode or a MOS transistor;

[0058] The signal processor 230 is configured to output a low-level signal to the control circuit 240 when it does not receive the first high-level signal output by the signal preprocessing module 220 . The control circuit 240 remains disconnected when the signal received at the input end is a low-level signal.

[0059] Specifically, the signal processor 230 can respond according to the signal output by the signal pre-processing module 220 received in real time, and therefore, it also needs to be connected to the power supply 250 and powered by the power supply 250 .

[0060] Since one end of the control circuit 240 is connected to the power supply 250, in order to prevent the current from flowing back from the input end of the control circuit 240 to the output end of the signal processor 230 and causing damage to the equipment, a diode or MOS tube can be set between the output end of the signal processor 230 and the input end of the control circuit 240 to prevent the current from flowing back.

[0061] Under normal circumstances, the signal processor 230 is configured to continuously output a low-level signal to the control circuit 240 when not receiving the first high-level signal, so as to keep the control circuit 240 in the disconnected state.

[0062] In some embodiments, in an abnormal state, if the signal processor 230 is powered off, the output end of the signal processor 230 cannot output an electrical signal. At this time, the control circuit 240 will remain in a disconnected state because it does not receive a high-level electrical signal (i.e., the second high-level electrical signal) to avoid abnormal wake-up of the MCU and the device.

[0063] In one embodiment of the present disclosure, the MCU is connected to the input terminal of the control circuit 240 through a diode, and the MCU is configured to send a second high level signal to the input terminal of the control circuit 240 when in a working state.

[0064] Specifically, after the MCU and power supply 250 are connected through control circuit 240, power supply 250 directly supplies power to the MCU. At this point, the MCU continuously sends an electrical signal (i.e., the second high-level electrical signal) to the control circuit 240 via a circuit connected to the input terminal of the control circuit 240, ensuring that the control circuit 240 remains conductive and maintains the MCU's continuous operation. The provision of a diode (and optionally a resistor) also prevents reverse current flow into the MCU, ensuring the safety of the MCU.

[0065] In one embodiment of the present disclosure, the MCU is connected to the input end of the signal processor 230. The MCU is used to send a low-level signal to the signal processor 230 when it needs to enter a sleep state. The signal processor 230 is used to input a low-level signal to the control circuit 240 based on the low-level signal. The control circuit 240 is used to switch to a disconnected state based on the received low-level signal.

[0066] Specifically, when the device ends its working state and needs to sleep, the MCU will send a low-level signal to the signal processor 230. When the signal processor 230 receives the low-level signal sent by the MCU, it will output a low-level signal to the control circuit 240 to disconnect the control circuit 240, thereby switching the MCU to sleep state.

[0067] In some embodiments, when the MCU sends a low-level signal to the signal processor 230, regardless of whether the signal pre-processing module 220 sends a first high-level signal to the signal processor 230 at that time, the signal processor 230 will prioritize outputting the low-level signal and completing the sleep process. The device will not wake up again until it receives the first high-level signal from the signal pre-processing module 220 to the signal processor 230 after sleep. This can avoid signal interference during the sleep process and ensure the normal sleep process of the device.

[0068] In some embodiments, in contrast to the above situation, when the MCU sends a low-level signal to the signal processor 230, if the signal preprocessing module 220 sends a first high-level signal to the signal processor 230 at this time, the signal processor 230 will preferentially output the second-level signal to ensure the availability of the device.

[0069] Both of the above situations can be achieved by configuring specific processing rules of the signal processor 230, which will not be further described here.

[0070] In one embodiment of the present disclosure, the MCU is communicatively connected to the signal preprocessing module 220; the signal preprocessing module 220 is used to preprocess the interactive signal and send the preprocessed interactive signal to the MCU, and the MCU is used to receive the preprocessed interactive signal when it is in a working state.

[0071] Specifically, when the MCU is in working state, it can receive other interactive signals sent by the user through communication with the signal preprocessing module 220, and complete real-time interaction with the smart device without the participation of the signal processor 230, so as to ensure the real-time and efficiency of the interaction.

[0072] In one embodiment of the present disclosure, the signal pre-processing module 220 is connected to the MCU and the signal processor 230 via a filtering circuit 221 .

[0073] Specifically, since the signal preprocessing module 220 only performs simple recognition and processing on the interactive signal, the signal it transmits may be interfered with by noise, which may cause the signal processor 230 to erroneously operate due to the noise (such as mistakenly recognizing the noise signal as the first high-level electrical signal). Therefore, a filtering circuit 221 can be added to the output end of the signal preprocessing module 220 to filter out the noise signal that may be generated.

[0074] In some embodiments, because the signal pre-processing module 220, the signal processor 230, and the MCU require different operating voltages / currents, the power supply 250 can be connected to the signal processing module 200, the signal processor 230, and the MCU via a power conversion circuit 251 (or voltage conversion circuit) to meet the power supply requirements of the corresponding devices. In this case, the power conversion circuit 251 can be located anywhere between the power supply 250 and the signal processing module 200, between the power supply 250 and the signal processor 230, and between the power supply 250 and the MCU.

[0075] In some embodiments, if the power source 250 is a battery, other components between the power source 250 and the device wake-up circuit 200 may be provided with a power connector 252 , so that the battery can be easily replaced to ensure the availability of the device wake-up circuit 200 .

[0076] In one embodiment of the present disclosure, the signal acquisition module 210 is a voice acquisition module, and the signal preprocessing module 220 is an audio processing module; or, the signal acquisition module 210 is an image acquisition module, and the signal preprocessing module 220 is an image processing module; or, the signal acquisition module 210 is an infrared processing module, and the signal preprocessing module 220 is an infrared data processing module.

[0077] Specifically, depending on the types of interactive signals and wake-up signals, the signal acquisition module 210 and the signal preprocessing module 220 can respectively adopt corresponding types of structures. The possible selection of the signal acquisition module 210 and the signal preprocessing module 220 has been described above and will not be repeated here.

[0078] In one embodiment of the present disclosure, the signal processor 230 is a latch, a timer, or a signal trigger that pre-stores a signal correspondence relationship.

[0079] Specifically, signal triggers, timers, and latches are all components that have the function of outputting signals of corresponding levels based on pre-configured rules when receiving signals of different levels. Technical personnel in this field can select corresponding components according to actual conditions, and there is no limitation here.

[0080] In one embodiment of the present disclosure, when the signal processor 230 is a latch, the signal processor 230 is connected to the signal pre-processing module 220 and the MCU through two different input terminals, respectively.

[0081] Specifically, the latch can output signals of different levels based on pre-configured rules and includes multiple different input terminals. Therefore, when the signal processor 230 is a latch, it can be connected to the signal preprocessing module 220 and the MCU respectively through different input terminals to avoid signal interference.

[0082] In one embodiment of the present disclosure, if the signal output by the signal preprocessing module 220 is a universal asynchronous receiver / transmitter signal, the signal preprocessing module 220 is connected to the signal processor 230 and the MCU respectively through output lines, and the MCU is connected to the input end of the signal preprocessing module 220 through an input line.

[0083] Specifically, the Universal Asynchronous Receiver / Transmitter (UART) signal, also known as the Universal Asynchronous Receiver / Transmitter (UART) signal, can convert parallel data into serial data for transmission, or convert received serial data into parallel data for processing by the receiver. By using the UART signal as the output signal of the signal preprocessing module 220, the UART signal can be directly used to transmit the result of interactive signal preprocessing, i.e., to confirm that the interactive signal is a wake-up signal. In this case, the signal preprocessing module 220 will only send the UART signal (a first high-level signal) to the signal processor 230 when it recognizes the presence of the wake-up signal. Upon receiving the UART signal, the signal processor 230 will output a second high-level signal, turning on the control circuit 240 and completing the power-on wake-up of the MCU.

[0084] The device wake-up circuit provided by the embodiment of the present disclosure realizes the synchronous sleep of the MCU when the device is in sleep mode through the relevant connection and coordination of the signal acquisition module, the signal preprocessing module, the signal processor, the control circuit, the power supply and the MCU. The control circuit can be triggered to be turned on and off according to the level signal output by the signal preprocessing module, thereby completing the power-on wake-up and power-off sleep of the MCU. The entire process does not require the MCU to be in the on state continuously, thereby significantly saving energy consumption and enhancing the battery life of the device.

[0085] In the above embodiments, the description of each embodiment has its own emphasis. For parts not described in detail in a particular embodiment, please refer to the relevant description of other embodiments. The technical features of the above embodiments can be combined in any way. To keep the description concise, not all possible combinations of the technical features in the above 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.

[0086] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of the present application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0087] It should be understood that the present application is not limited to the exact structure described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A device wake-up circuit, characterized in that: include: Signal acquisition module, signal preprocessing module, signal processor, control circuit, MCU and power supply; The signal acquisition module is connected in series with the signal preprocessing module and the power supply and is in a continuously turned-on state. The signal preprocessing module is connected to the input end of the signal processor, the output end of the signal processor is connected to the control circuit, and the two ends of the control circuit are respectively connected to the MCU and the power supply; The signal acquisition module is used to receive the interaction signal and transmit it to the signal preprocessing module. The signal preprocessing module is used to extract the characteristics of the interaction signal and send a first high-level signal to the signal processor when the characteristics meet the set conditions. The signal processor is used to output a corresponding second high-level signal to the control circuit based on the first high-level signal. The control circuit is used to connect the MCU to the power supply and wake up the MCU when receiving the second high-level signal. The wake-up is used to indicate that the MCU is switched from a non-working state to a working state. When the control circuit does not receive the second high-level signal, it is in a disconnected state.

2. The device wake-up circuit according to claim 1, characterized in that: The signal processor is connected to a power supply, and the output end of the signal processor is connected to the input end of the control circuit through a diode or a MOS tube; The signal processor is used to output a low-level signal to the control circuit when it does not receive the first high-level signal output by the signal preprocessing module. When the signal received at the input end of the control circuit is a low-level signal, the control circuit remains in a disconnected state.

3. The device wake-up circuit according to claim 2, characterized in that: The MCU is connected to the input end of the control circuit through a diode, and the MCU is used to send a second high level signal to the input end of the control circuit when in a working state.

4. The device wake-up circuit according to claim 3, characterized in that: The MCU is connected to the input end of the signal processor. The MCU is used to send a low-level signal to the signal processor when it needs to enter a sleep state. The signal processor is used to input a low-level signal to the control circuit based on the low-level signal. The control circuit is used to switch to an off state based on the received low-level signal.

5. The device wake-up circuit according to claim 1, characterized in that: The MCU is communicatively connected to the signal preprocessing module; The signal preprocessing module is used to preprocess the interactive signal and send the preprocessed interactive signal to the MCU. The MCU is used to receive the preprocessed interactive signal when in a working state.

6. The device wake-up circuit according to claim 5, characterized in that: The signal preprocessing module is connected to the MCU and the signal processor via a filtering circuit.

7. The device wake-up circuit according to any one of claims 1 to 6, characterized in that: The signal acquisition module is a voice acquisition module, and the signal pre-processing module is an audio processing module; or, The signal acquisition module is an image acquisition module, and the signal preprocessing module is an image processing module; or, The signal acquisition module is an infrared processing module, and the signal preprocessing module is an infrared data processing module.

8. The device wake-up circuit according to any one of claims 1 to 6, characterized in that: The signal processor is a latch, a timer or a signal trigger that stores signal correspondences in advance.

9. The device wake-up circuit according to claim 8, characterized in that: When the signal processor is a latch, the signal processor is connected to the signal preprocessing module and the MCU through two different input terminals respectively.

10. The device wake-up circuit according to any one of claims 1 to 6, characterized in that: If the signal output by the signal preprocessing module is a universal asynchronous receiver / transmitter signal, the signal preprocessing module is connected to the signal processor and the MCU respectively through output lines, and the MCU is connected to the input end of the signal preprocessing module through an input line.

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