Voice-controlled electric blanket

Abstract

The utility model discloses a voice-controlled electric blanket. A blanket body of the voice-controlled electric blanket comprises a heat conduction material and an outer-layer heat transfer material, the online voice control unit comprises a WiFi module, an AI chip and a Bluetooth chip; the WiFi module is used for establishing connection between the electric blanket and a household wireless network, transmitting voice instruction data and realizing data transmission and network communication; the AI chip is used for controlling the temperature of the electric blanket; the Bluetooth chip is used for establishing short-distance connection with local equipment and receiving a user instruction; the off-line voice control unit comprises a sound receiver, an analog front-end circuit, an AEC chip, a DSP, an AEC module and a voice chip; the sound receiver is used for collecting a user voice instruction, and the analog front-end circuit, the AEC chip, the DSP and the AEC module are used for cooperatively working to eliminate echoes and suppress noise; the voice chip is used for sending a voice control signal to the master control MCU. The intelligent electric blanket solves the problems that a traditional electric blanket is inconvenient to operate, inaccurate in temperature control, poor in safety performance, low in intelligent degree and the like.

Description

Technical Field

[0001] This utility model relates to a voice-controlled electric blanket, belonging to the field of electric blanket technology. Background Technology

[0002] Traditional electric blankets, as a common heating device in winter, provide warmth to people in cold weather and play an important role in daily life. However, with the development of technology and the improvement of people's living standards, some shortcomings of traditional electric blankets in terms of functionality and user experience have gradually become apparent.

[0003] Currently, traditional electric blankets rely on mechanical buttons or knobs for operation, which is not flexible or convenient enough, and is inconvenient for certain groups of people. In terms of temperature control, there are limited settings, making it impossible to accurately adapt to individual needs and environmental changes, and variations in component performance can easily lead to temperature deviations. Regarding safety, there are hazards such as short circuits and overloads that could cause fires, and there is a lack of effective fault detection and protection. Furthermore, their level of intelligence is low, they cannot be integrated with smart homes, and they cannot be remotely controlled or have their operating data retrieved. Therefore, it is necessary to develop voice-controlled smart electric blankets that combine voice recognition, the Internet of Things (IoT), and artificial intelligence technologies. Utility Model Content

[0004] Therefore, this utility model provides a voice-controlled electric blanket, which solves the problems of inconvenient operation, inaccurate temperature control, poor safety performance and low level of intelligence of traditional electric blankets.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a voice-controlled electric blanket, comprising:

[0006] The blanket body includes a thermally conductive material and an outer heat-transferring material.

[0007] The controller module includes a main control MCU, a control panel, an NTC thermistor, and an LED digital display. The control panel is used for users to manually input operation commands. The NTC thermistor is used to collect the blanket temperature in real time and feed it back to the main control MCU. The LED digital display is used to display temperature, time, or fault code information.

[0008] An online voice control unit includes a WiFi module, an AI chip, and a Bluetooth chip. The WiFi module is used to establish a connection between the electric blanket and the home wireless network, transmit voice command data, and realize data transmission and network communication. The AI ​​chip is used to control the temperature of the electric blanket. The Bluetooth chip is used to establish a short-range connection with local devices and receive user commands.

[0009] An offline voice control unit includes a sound receiver, an analog front-end circuit, an AEC chip, a DSP, an AEC module, and a voice chip. The sound receiver is used to collect user voice commands. The analog front-end circuit, the AEC chip, the DSP, and the AEC module work together to eliminate echo and suppress noise. The voice chip is used to send voice control signals to the main control MCU.

[0010] As a preferred option for voice-controlled electric blankets, the following also include:

[0011] A safety protection module, comprising a hardware-level protection circuit, is provided to cut off the circuit when the electric blanket overheats or overcurrents.

[0012] As a preferred option for voice-controlled electric blankets, the following also include:

[0013] The power module includes a bidirectional thyristor, a step-down switching power supply chip, a fuse, and a multi-channel thyristor voltage regulation circuit.

[0014] The step-down switching power supply chip is used to convert the main power of the electric blanket into DC power to power the control circuit.

[0015] The bidirectional thyristor is used to adjust the AC voltage output and control the heating power through the PWM signal of the main control MCU;

[0016] The fuse is used to provide hardware-level overcurrent protection for the electric blanket;

[0017] The multi-channel thyristor voltage regulation circuit is used to achieve zoned temperature control of the electric blanket.

[0018] As a preferred solution for voice-controlled electric blankets, the power module is connected to a rated voltage 100V-250V 50 / 60HZ power supply via a main power cable. The main power cable is sequentially connected to the fuse, the step-down switching power supply chip, and the bidirectional thyristor.

[0019] The bidirectional thyristor is connected to the multi-channel thyristor voltage regulation circuit, the multi-channel thyristor voltage regulation circuit is connected to the main power cable connector, and the main power cable connector is connected to the blanket body.

[0020] As a preferred solution for voice-controlled electric blankets, the main control MCU is connected to the control button board, the NTC thermistor, the LED digital tube, the bidirectional thyristor, the AI ​​chip, and the voice chip.

[0021] As a preferred solution for voice-controlled electric blankets, the sound receiver is sequentially connected to the analog front-end circuit, the AEC chip, the DSP, and the AEC module, and the AEC module is connected to the voice chip.

[0022] As a preferred solution for voice-controlled electric blankets, in the online voice control unit, the WiFi module and the AI ​​chip are respectively connected to a cloud server, the cloud server is connected to a mobile terminal, and the Bluetooth chip establishes a connection with the mobile terminal.

[0023] As a preferred solution for voice-controlled electric blankets, the NTC thermistor is installed inside the blanket body to collect the temperature information of the blanket body and feed it back to the main control MCU.

[0024] This utility model has the following advantages:

[0025] First, it is easy to operate: equipped with online and offline voice control units, users can control it through voice commands without manual operation, which is especially suitable for the elderly, children and people with mobility difficulties, and can also be easily controlled when sleeping or when it is inconvenient to get up.

[0026] Secondly, precise temperature control: The AI ​​chip, combined with the NTC thermistor, can dynamically and accurately adjust the temperature according to the room temperature and user habits. The multi-channel thyristor voltage regulation circuit can also achieve zoned temperature control to meet personalized needs.

[0027] Third, safe and reliable: hardware-level protection circuits and fuses cut off the circuit in case of over-temperature or over-current, and fault detection logic monitors in real time, reducing safety hazards and ensuring safe use.

[0028] Fourth, intelligent interconnection: It connects to the cloud server and mobile terminal through WiFi module and Bluetooth chip to realize remote control and data interaction, so that users can understand and adjust the status of electric blanket at any time.

[0029] Fifth, superior user experience: The LED digital display can show information such as temperature, time, or fault codes, allowing users to keep track of the electric blanket's working status. Meanwhile, the offline voice control unit can still perform basic voice control functions even when the network is disconnected. Attached Figure Description

[0030] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0031] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0032] Figure 1 This is a schematic diagram of the voice-controlled electric blanket provided in an embodiment of the present utility model.

[0033] Figure 2 This is a schematic diagram of the hardware architecture of the voice-controlled electric blanket provided in the embodiments of this utility model.

[0034] Figure 3 This is a circuit diagram of the voice chip for a voice-controlled electric blanket provided in an embodiment of this utility model;

[0035] Figure 4 This is a circuit diagram of the voice-controlled electric blanket MIC provided in the embodiments of this utility model;

[0036] Figure 5 This is the voice-controlled electric blanket analog front-end circuit provided in the embodiments of this utility model;

[0037] Figure 6 This is a circuit diagram of the voice-controlled electric blanket power module provided in an embodiment of the present invention.

[0038] In the diagram, 1 is the blanket body; 11 is the thermally conductive material; and 12 is the outer heat transfer material.

[0039] 2. Controller module; 21. Main control MCU; 22. Control button board; 23. NTC thermistor; 24. LED digital tube;

[0040] 3. Online voice control unit; 31. WiFi module; 32. AI chip; 33. Bluetooth chip;

[0041] 4. Offline voice control unit; 41. Sound receiver; 42. Analog front-end circuit; 43. AEC chip; 44. DSP; 45. AEC module; 46. Voice chip;

[0042] 5. Safety protection module; 51. Hardware-level protection circuit;

[0043] 6. Power supply module; 61. Bidirectional thyristor; 62. Buck switching power supply chip; 63. Fuse; 64. Multi-channel thyristor voltage regulation circuit;

[0044] 7. Main power cable;

[0045] 8. Main power cable connector;

[0046] 9. Cloud server;

[0047] 10. Mobile terminals. Detailed Implementation

[0048] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0049] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 This utility model embodiment provides a voice-controlled electric blanket, comprising:

[0050] The blanket body 1 includes a thermally conductive material 11 and an outer heat transfer material 12. The thermally conductive material 11 can efficiently convert electrical energy into heat energy and can be made of alloy heating wire or graphene. The alloy heating wire has good electrical and thermal conductivity, generating heat when current passes through it; graphene has extremely high thermal conductivity, enabling faster and more uniform heating. The outer heat transfer material 12 protects the thermally conductive material 11 and evenly transfers heat to the surrounding environment. It is typically made of materials with good thermal insulation and heat transfer properties, such as flannel, cashmere, non-woven fabric, three-proof fabric, fiberglass cloth, polyester fiber, and cotton cloth. These materials can reduce heat loss and make the surface temperature distribution of the electric blanket more uniform.

[0051] The controller module 2 includes a main control MCU 21, a control panel 22, an NTC thermistor 23, and an LED digital tube 24. The control panel 22 is used for manual input of operation commands by the user. The NTC thermistor 23 is used to collect the temperature of the blanket 1 in real time and feed it back to the main control MCU 21. The LED digital tube 24 is used to display temperature, time, or fault code information. The main control MCU 21, as the core of the entire controller module 2, receives signals from various components, processes and analyzes them, and then issues corresponding control commands. For example, an STM32 series main control MCU 21 is selected, which features high performance and low power consumption. The control panel 22 provides a manual control method for the user; the user can set functions such as temperature and timer by pressing different buttons. The NTC thermistor 23 can be a 5D-11 series, a negative temperature coefficient thermistor whose resistance decreases as the temperature increases. By measuring its resistance change, the main control MCU 21 can obtain the temperature information of the blanket 1 in real time. Moreover, the NTC thermistor 23 is embedded in each section of the electric blanket, providing high-precision temperature data. The LED digital tube 24 consists of LED indicator lights and a digital tube. According to the instructions of the main control MCU 21, it displays information such as temperature, time or fault code in digital form for easy viewing by the user.

[0052] The online voice control unit 3 includes a WiFi module 31, an AI chip 32, and a Bluetooth chip 33. The WiFi module 31 establishes a connection between the electric blanket and the home wireless network, transmits voice command data, and enables data transmission and network communication. The AI ​​chip 32 controls the temperature of the electric blanket. The Bluetooth chip 33 establishes a short-range connection with local devices and receives user commands. The WiFi module 31 enables the electric blanket to connect to the home wireless network. It uses a dual-mode WiFi+BT wireless module based on the ESP32 series chip or AP6255 chip, conforming to the 802.11b / g / n / ac standard and supporting 2.4G and 5G dual-band. The WiFi interface is SDIO, and the Bluetooth interface is a UART serial port, communicating with the cloud server 9 via the network. Users can issue voice commands via an app on the mobile terminal 10. The commands are transmitted through the cloud server 9 to the WiFi module 31 and then to the main control MCU 21. The cloud server 9 can be a Google Cloud platform, Alibaba Cloud server, or Amazon Web Services. AI chip 32 is an AI module based on the JL series AC7911B8 / BA. Employing artificial intelligence algorithms, it can learn user habits and ambient temperature information to automatically adjust the electric blanket's temperature, achieving intelligent temperature control. Bluetooth chip 33 can be a product from JL or Zhongke Lanxun, providing users with another short-range control method. When a user's mobile phone or other device is paired with Bluetooth chip 33, it can control the electric blanket within a certain range via Bluetooth command transmission.

[0053] The offline voice control unit 4 includes a sound receiver 41, an analog front-end circuit 42, an AEC chip 43, a DSP 44, an AEC module 45, and a voice chip 46. The sound receiver 41 is used to collect user voice commands. The analog front-end circuit 42, the AEC chip 43, the DSP 44, and the AEC module 45 work together to eliminate echo and suppress noise. The voice chip 46 is used to send voice control signals to the main control MCU 21. The sound receiver 41 is typically a microphone, such as a 6050 / 9767 / 4013 / 4015 microphone, responsible for collecting user voice commands. The analog front-end circuit 42 uses an OPA1612 to preprocess the analog voice signal collected by the microphone, such as amplifying and filtering, to improve signal quality. The AEC chip 43 (acoustic echo cancellation chip) uses an ADIADAU1772, and the AEC module 45 is mainly used to eliminate environmental echoes, making the received voice signal clearer. The DSP44 (Digital Signal Processor) uses the TITMS320C5515 to digitally process the processed speech signal and extract useful information. The speech chip 46 can be an offline speech chip from the JL701 series, AC695 series, AP8064 series, RK2108 series, Qiying Tailun chip, or iFlytek chip. It recognizes and parses the processed speech signal, converting it into control signals that are sent to the main control MCU21, thus enabling offline speech control.

[0054] In this embodiment, a safety protection module 5 is also included, which includes a hardware-level protection circuit 51. The hardware-level protection circuit 51 is used to cut off the circuit when the electric blanket overheats or overcurrents.

[0055] Specifically, the hardware-level protection circuit 51 is a hardware-based safety protection mechanism that detects the temperature and current of the electric blanket to determine if there is an over-temperature or over-current situation. For example, temperature and current sensors are set in the circuit. When the temperature or current exceeds the set safety threshold, the hardware-level protection circuit 51 will quickly cut off the circuit to prevent safety accidents such as fires caused by overheating or overload. The circuit also uses an AUPO resistive thermal fuse 63 (P2-F 2A250V 115 degrees) and a one-time fuse 63 (5TE 1.6A250V) (fused), as well as a safety capacitor 40 / 100 / 21 (TCM EX / TENTAMKP1.2UFKX2275V). These components together provide hardware-level overcurrent protection for the electric blanket. This protection mechanism is real-time and direct, does not rely on software control, and has high reliability.

[0056] In this embodiment, a power module 6 is also included. The power module 6 includes a bidirectional thyristor 61, a step-down switching power supply chip 62, a fuse 63, and a multi-channel thyristor voltage regulation circuit 64. The step-down switching power supply chip 62 is used to convert the main power supply of the electric blanket into DC power to power the control circuit. The bidirectional thyristor 61 is used to adjust the AC voltage output through the PWM signal of the main control MCU 21 to control the heating power. The fuse 63 is used to provide hardware-level overcurrent protection for the electric blanket. The multi-channel thyristor voltage regulation circuit 64 is used to realize zoned temperature control of the electric blanket.

[0057] Specifically, the buck switching power supply chip 62 can be a KP311BH, a non-isolated, highly integrated, and low-cost PWM power switch suitable for buck and buck-boost circuits (KP311BHWG, AQ8HNR.1, PO4029), converting the input 100V-250V 50 / 60HZ AC main power supply into DC power suitable for the control circuit, such as converting it to 5V or 3.3V DC. The bidirectional thyristor 61 can be a KYBT136S 800D 312J149, which can adjust the AC voltage output according to the PWM (Pulse Width Modulation) signal issued by the main control MCU21. Voltage and temperature regulation are achieved by adjusting the conduction angle, supporting flexible AC voltage control, and suitable for zoned heating circuits. By changing the duty cycle of the PWM signal, the conduction angle of the bidirectional thyristor 61 can be controlled, thereby adjusting the heating power of the electric blanket. Fuse 63 uses an AUPO resistance-type thermal fuse (P2-F 2A 250V 115 degrees Celsius) to provide hardware-level overcurrent protection for the electric blanket. The multi-channel thyristor voltage regulating circuit 64 uses a BTA16 TO-220F 16A, which can control the heating power of different areas of the electric blanket separately, achieving zoned temperature control to meet the temperature needs of different parts of the user's body.

[0058] In this embodiment, the power module 6 is connected to a rated voltage 100V-250V 50 / 60HZ power supply via a main power cable 7. The main power cable 7 is sequentially connected to the fuse 63, the step-down switching power supply chip 62, and the bidirectional thyristor 61. The bidirectional thyristor 61 is connected to the multi-channel thyristor voltage regulation circuit 64, the multi-channel thyristor voltage regulation circuit 64 is connected to the main power cable connector 8, and the main power cable connector 8 is connected to the blanket body 1.

[0059] Specifically, the main power cable 7 serves as the power transmission channel, introducing external AC power into the power module 6 of the electric blanket. An AUPO resistance-type thermal fuse (P2-F 2A250V 115 degrees Celsius) first provides overcurrent protection for the entire circuit, preventing excessive current from damaging subsequent components. The KP311BH step-down switching power supply chip 62 converts high-voltage AC power into low-voltage DC power, providing a stable power supply for the control circuit. The bidirectional thyristor 61 adjusts the AC voltage output according to the instructions of the main control MCU 21, controlling the heating power. The multi-channel thyristor voltage regulation circuit 64 further adjusts the heating power in different areas. The main power cable connector 8 connects the power module 6 and the blanket body 1, ensuring that electrical energy can be smoothly transmitted to the heat-conducting material 11 of the blanket body 1 to achieve the heating function.

[0060] In this embodiment, the main control MCU 21 is connected to the control button board 22, the NTC thermistor 23, the LED digital tube 24, the bidirectional thyristor 61, the AI ​​chip 32, and the voice chip 46, respectively.

[0061] Specifically, the main control MCU 21 is connected to the control button board 22 to receive user input commands via buttons and control the electric blanket accordingly. It is connected to the 5D-11 series NTC thermistor 23 to acquire real-time temperature information of the blanket body 1, allowing for adjustment of heating power based on temperature changes. It is connected to the LED digital tube 24, composed of LED indicators and a digital display, to display information such as temperature, time, or fault codes, informing the user of the electric blanket's operating status. It is connected to the bidirectional thyristor 61, controlling its conduction angle by sending PWM signals to adjust the heating power. It is connected to the AI ​​module AI chip 32, based on the JL7911B8 / BA series design, to acquire the temperature control strategy generated by the AI ​​chip 32 based on user habits and ambient temperature, and execute corresponding control operations. Finally, it is connected to the offline voice chip 46, such as the JL701 series, to receive voice control signals and implement voice control functionality.

[0062] In this embodiment, the sound receiver 41 is sequentially connected to the analog front-end circuit 42, the AEC chip 43, the DSP 44, and the AEC module 45, and the AEC module 45 is connected to the voice chip 46.

[0063] Specifically, after the sound receiver 41 acquires the user's voice command, it transmits the analog voice signal to the analog front-end circuit 42 for preprocessing to improve signal quality. Then, the signal undergoes echo cancellation and noise suppression via the AEC chip 43 and AEC module 45, making the voice signal clearer. Next, the DSP 44 performs digital processing on the processed signal to extract useful voice features. Finally, the AEC module 45 transmits the processed signal to the JL701 series voice chip 46, which recognizes and parses the signal, converting it into control signals and sending them to the main control MCU 21 to achieve offline voice control functionality.

[0064] In this embodiment, in the online voice control unit 3, the WiFi module 31 and the AI ​​chip 32 are respectively connected to the cloud server 9, the cloud server 9 is connected to the mobile terminal 10, and the Bluetooth chip 33 establishes a connection with the mobile terminal 10.

[0065] Specifically, the WiFi module 31, based on the ESP32 series chip or AP6255 chip, establishes a connection with the cloud server 9 (Google Cloud Platform, Alibaba Cloud Server, or Amazon Web Services) through the home wireless network. It transmits voice commands issued by the user on the mobile terminal 10's APP to the cloud server 9. The cloud server 9 processes the commands and then feeds them back to the WiFi module 31, which in turn transmits them to the main control MCU 21. The AI ​​module chip 32, based on the JL AC7911B8 / BA design, connects to the cloud server 9. On one hand, it can upload collected user habits and ambient temperature data to the cloud server 9 for analysis and storage; on the other hand, it can obtain the latest temperature control strategies from the cloud server 9. The mobile terminal 10 connects to the cloud server 9 via the network to remotely control the electric blanket. The Bluetooth chip 33, from JL or Zhongke Lanxun, establishes a short-range connection with the mobile terminal 10, allowing users to send control commands directly to the electric blanket via Bluetooth even without a network connection.

[0066] In this embodiment, the NTC thermistor 23 is disposed inside the blanket 1 and is used to collect the temperature information of the blanket 1 and feed it back to the main control MCU 21.

[0067] Specifically, the 5D-11 series NTC thermistor 23 has a negative temperature coefficient, meaning its resistance changes with temperature. Placed inside the blanket 1, it allows direct measurement of the blanket 1's temperature. When the temperature of the blanket 1 changes, the resistance of the NTC thermistor 23 also changes. By measuring this resistance change, the main control MCU 21 can calculate the actual temperature of the blanket 1. The main control MCU 21 compares the received temperature information with the user-set temperature and then adjusts the heating power by controlling components such as the bidirectional thyristor 61 to maintain the blanket 1 temperature within the set range.

[0068] The workflow of this utility model is as follows:

[0069] First, the initialization phase

[0070] When the 100V-250V 50 / 60HZ power supply is connected, the current flows through the fuse 63 in sequence. After ensuring that the current is normal, it enters the step-down switching power supply chip 62, which converts the AC power into DC power to power the entire control circuit.

[0071] The main control MCU21 starts up and performs initialization tests on each module, including connection tests and parameter initialization with the control button board 22, NTC thermistor 23, LED digital tube 24, bidirectional thyristor 61, online voice control unit 3 (WiFi module 31, AI chip 32, Bluetooth chip 33), offline voice control unit 4 (sound receiver 41, analog front-end circuit 42, AEC chip 43, DSP 44, AEC module 45, voice chip 46) and safety protection module 5 (hardware-level protection circuit 51 and related components).

[0072] Second, the control command receiving stage.

[0073] Manual control: Users input operation commands such as temperature adjustment and timing through the control panel 22, and the main control MCU 21 receives and parses these commands.

[0074] Online voice control: WiFi module 31 connects to the home wireless network. Users can issue voice commands on the APP of mobile terminal 10. The commands are transmitted to WiFi module 31 via cloud server 9 (Google Cloud Platform, Alibaba Cloud Server or Amazon Web Services) and then to main control MCU 21. At the same time, AI chip 32 obtains data analysis results from the cloud for temperature control strategy formulation.

[0075] Offline voice control: The sound receiver 41 collects the user's voice commands, the analog front-end circuit 42 preprocesses the signal, the AEC chip 43 and AEC module 45 eliminate echo and noise, the DSP 44 performs digital processing, and the voice chip 46 recognizes and parses the voice commands before sending the control signal to the main control MCU 21.

[0076] Third, temperature control stage

[0077] The NTC thermistor 23 collects temperature information of each zone of the blanket 1 in real time. Its resistance changes with temperature, and the main control MCU 21 calculates the actual temperature by measuring the resistance.

[0078] The main control MCU21 compares the actual temperature with the user-set temperature. If there is a deviation, it controls the conduction angle of the bidirectional thyristor 61 through the PWM signal to adjust the AC voltage output and change the heating power. At the same time, the multi-channel thyristor voltage regulation circuit 64 performs zoned temperature control on different areas of the electric blanket according to the instructions of the main control MCU21 to ensure that the temperature of the blanket body 1 meets the user's needs.

[0079] Fourth, the status feedback phase

[0080] The LED digital tube 24 displays information such as current temperature, time, or fault code according to the instructions of the main control MCU 21, allowing users to understand the working status of the electric blanket in real time.

[0081] If overheating or overcurrent occurs, the hardware-level protection circuit 51 in the safety protection module 5 will quickly cut off the circuit and send the fault information to the LED digital tube 24 to display the fault code through the main control MCU 21.

[0082] The present invention has been described in a relatively specific and detailed manner above through general description and specific embodiments. It should be understood that, based on the technical concept of the present invention, several conventional adjustments or further innovations can be made to these specific embodiments; however, as long as they do not depart from the technical concept of the present invention, the technical solutions obtained by these conventional adjustments or further innovations also fall within the protection scope of the claims of the present invention.

Claims

1. A voice controlled electric blanket, characterized in that, include: Blanket body (1), the blanket body (1) includes thermally conductive material (11) and outer heat transfer material (12); The controller module (2) includes a main control MCU (21), a control button board (22), an NTC thermistor (23), and an LED digital tube (24); the control button board (22) is used for users to manually input operation commands; the NTC thermistor (23) is used to collect the blanket temperature in real time and feed it back to the main control MCU (21); the LED digital tube (24) is used to display temperature, time, or fault code information. The online voice control unit (3) includes a WiFi module (31), an AI chip (32), and a Bluetooth chip (33). The WiFi module (31) is used to establish a connection between the electric blanket and the home wireless network, transmit voice command data, and realize data transmission and network communication. The AI ​​chip (32) is used to control the temperature of the electric blanket. The Bluetooth chip (33) is used to establish a short-range connection with local devices and receive user commands. The offline voice control unit (4) includes a sound receiver (41), an analog front-end circuit (42), an AEC chip (43), a DSP (44), an AEC module (45), and a voice chip (46). The sound receiver (41) is used to collect user voice commands. The analog front-end circuit (42), the AEC chip (43), the DSP (44), and the AEC module (45) work together to eliminate echo and suppress noise. The voice chip (46) is used to send voice control signals to the main control MCU (21).

2. A voice controlled electric blanket as claimed in claim 1, wherein, Also includes: Safety protection module (5), the safety protection module (5) includes hardware-level protection circuit (51); The hardware-level protection circuit (51) is used to cut off the circuit when the electric blanket is overheated or overcurrent.

3. The voice controlled electric blanket of claim 1, wherein, Also includes: The power module (6) includes a bidirectional thyristor (61), a step-down switching power supply chip (62), a fuse (63), and a multi-channel thyristor voltage regulation circuit (64). The step-down switching power supply chip (62) is used to convert the main power supply of the electric blanket into DC power to power the control circuit; The bidirectional thyristor (61) is used to adjust the AC voltage output and control the heating power through the PWM signal of the main control MCU (21); The fuse (63) is used to provide hardware-level overcurrent protection for the electric blanket; The multi-channel thyristor voltage regulation circuit (64) is used to realize zoned temperature control of the electric blanket.

4. The voice controlled electric blanket of claim 3, wherein, The power module (6) is connected to a rated voltage 100V - 250V 50 / 60HZ power supply via a main power cable (7). The main power cable (7) is connected in sequence to the fuse (63), the step-down switching power supply chip (62), and the bidirectional thyristor (61). The bidirectional thyristor (61) is connected to the multi-channel thyristor voltage regulation circuit (64), the multi-channel thyristor voltage regulation circuit (64) is connected to the main power cable connector (8), and the main power cable connector (8) is connected to the blanket body (1).

5. The voice controlled electric blanket of claim 4, wherein, The main control MCU (21) is connected to the control button board (22), the NTC thermistor (23), the LED digital tube (24), the bidirectional thyristor (61), the AI ​​chip (32), and the voice chip (46), respectively.

6. The voice controlled electric blanket of claim 1, wherein, The sound receiver (41) is connected in sequence to the analog front-end circuit (42), the AEC chip (43), the DSP (44), and the AEC module (45), and the AEC module (45) is connected to the voice chip (46).

7. The voice controlled electric blanket of claim 1, wherein, In the online voice control unit (3), the WiFi module (31) and the AI ​​chip (32) are respectively connected to the cloud server (9), the cloud server (9) is connected to the mobile terminal (10), and the Bluetooth chip (33) establishes a connection with the mobile terminal (10).

8. The voice controlled electric blanket of claim 1, wherein, The NTC thermistor (23) is disposed inside the blanket (1) and is used to collect the temperature information of the blanket (1) and feed it back to the main control MCU (21).

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