Personalized voice control circuit of cooking utensil

Abstract

The utility model relates to the technical field of cooking utensils, in particular to a personalized voice control circuit of a cooking utensil, which comprises a voice input module, a voice broadcast module, a main control module and a voice storage module, the main control module is used for controlling the voice input module and the voice broadcast module to work, and the voice input module comprises a WiFi module. The voice receiving module is used for being connected with an external server and / or an input microphone to receive external voice signals; the main control module comprises a main control MCU, is in communication connection with the WiFi module through a serial interface and is used for controlling the WiFi module to work in an output or write-in state; the voice broadcast module comprises a power amplifier circuit and a broadcast loudspeaker, and the WiFi module is connected with the power amplifier circuit and is used for controlling the working state of the power amplifier circuit by adopting the working voltage of the WiFi module. The input and output of the voice data are realized through the WiFi module, and the working state of the power amplifier circuit is controlled through the working voltage of the WiFi module, so that the transmission efficiency of the voice data is improved, and the power consumption of the power amplifier circuit is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cooking utensils, in particular to a personalized voice control circuit of a cooking utensil. Background Art

[0002] With the popularity of smart home appliances, people have more and more requirements for smart home appliances. For example, more and more smart home appliances are beginning to use voice broadcast functions, such as cooking utensils to improve the user experience through voice broadcast functions. However, in current cooking utensils with voice broadcast functions, their voice broadcast modules are usually directly connected to the main control chip, which controls the voice chip to play the current voice information through the speaker, resulting in high power consumption of the voice chip, consuming too much electricity, and the input and output of voice data need to be transferred through the main control MCU, resulting in low voice transmission efficiency, which affects the user experience. Summary of the invention

[0003] The present utility model makes improvements to the problems existing in the above-mentioned prior art, that is, the purpose of this application is to provide a personalized voice control circuit for cooking appliances, which realizes the input and output of voice data through a WiFi module, and controls the working state of the power amplifier circuit through the working voltage of the WiFi module, thereby improving the transmission efficiency of voice data and reducing the power consumption of the power amplifier circuit.

[0004] The utility model discloses a personalized voice control circuit for a cooking utensil, comprising a voice input module, a voice broadcast module, a main control module and a voice storage module, wherein the voice input module is used to obtain external voice, the voice broadcast module is used to broadcast voice information, the main control module is used to control the voice input module and the voice broadcast module to work, the voice storage module is used to store preset voice information and externally written voice data, the voice input module comprises a WiFi module, which is used to connect to an external server and / or an input microphone to receive an external voice signal; the voice storage module is connected to the WiFi module through a serial interface, and is used to write external voice data; the main control module comprises a main control MCU, which is connected to the WiFi module through a serial interface, and is used to control the WiFi module to work in an output or write state; the voice broadcast module comprises a power amplifier circuit and a broadcast speaker, the WiFi module is connected to the power amplifier circuit, and is used to control the working state of the power amplifier circuit by using the working voltage of the WiFi module.

[0005] In one embodiment, the operating voltage of the WiFi module is 3.3V, and the WiFi module is connected to the enable input terminal of the power amplifier circuit to output a 3.3V or 0V voltage to the power amplifier circuit to control the power amplifier circuit to be disabled or enabled.

[0006] In one embodiment, a power supply voltage conversion circuit and a control voltage conversion circuit are connected between the main control MCU and the WiFi module, which are used to convert the 5V working voltage and 5V control voltage output by the main control MCU into 3.3V working voltage and 3.3V control voltage respectively and input them into the WiFi module.

[0007] In one embodiment, the power amplifier circuit includes a power amplifier chip. The operating voltage of the power amplifier circuit is 5V, so that the output power of the power amplifier chip reaches 3W.

[0008] In one embodiment, the main control MCU is connected to the WiFi module through a serial interface for the main control MCU and / or the WiFi module to detect the data transmission status. The main control MCU is used to control the WiFi module to enter a low power consumption mode when the serial interface is idle, or the WiFi module automatically enters a low power consumption mode when the serial interface is idle.

[0009] In one embodiment, the voice storage module includes a NOR Flash memory, and is communicatively connected to the WiFi module via an SPI interface.

[0010] In one embodiment, the WiFi module is connected to an external server, the main control MCU is connected to a voice data online update key circuit, the voice data online update key circuit is used to transmit the update key electrical signal to the main control MCU, and the main control MCU is used to control the WiFi module to switch to STA mode and download voice data from the external server.

[0011] In one embodiment, the main control MCU is connected to a local voice data switching button circuit, and the local voice data switching button circuit is used to transmit a switching button electrical signal to the main control MCU, and the main control MCU is used to control the WiFi module to call the corresponding voice data from the voice storage module.

[0012] In one embodiment, the main control MCU is connected to a voice data indicator light circuit, and the voice data indicator light circuit includes a plurality of indicator lights, and the plurality of indicator lights correspond to different voice data addresses respectively, and are used to prompt the type of voice data currently in use.

[0013] In one embodiment, the main control MCU is connected to a display interaction module, and the display interaction module includes a voice data selection interface for allowing a user to switch local voice data or update online voice data.

[0014] Beneficial effects:

[0015] 1) The utility model directly realizes the input and output of voice data through the WiFi module without the need for transfer through the main control MCU, which can improve the download and transmission efficiency of voice data, reduce the user waiting time, and enhance the user experience. In addition, the working voltage of the WiFi module is directly used to control the working state of the power amplifier circuit in the voice broadcast module, which can effectively reduce the power consumption of the power amplifier circuit, save electricity and extend the service life of the power amplifier circuit.

[0016] 2) In one embodiment of the utility model, the WiFi module is used to output a 3.3V or 0V voltage to the enable input terminal of the power amplifier circuit to control the power amplifier circuit to be disabled or enabled. The power amplifier circuit does not work when it is disabled, thereby reducing power consumption.

[0017] 3) In one embodiment of the utility model, the power supply voltage conversion circuit and the control voltage conversion circuit are used to convert the 5V working voltage and 5V control voltage output by the main control MCU into 3.3V working voltage and 3.3V control voltage respectively and input them into the WiFi module. The WiFi module directly controls the working state of the power amplifier circuit with the 3.3V working voltage. Compared with the main control MCU controlling the power amplifier circuit with the 5V working voltage, the power consumption of the power amplifier circuit can be reduced.

[0018] 4) In one embodiment of the utility model, the main control MCU is connected to the WiFi module through a serial interface for the main control MCU and / or the WiFi module to detect the data transmission status. The main control MCU is used to control the WiFi module to enter a low power consumption mode when the serial interface is idle, or the WiFi module automatically enters a low power consumption mode when the serial interface is idle, thereby reducing the power consumption of the WiFi module.

[0019] 5) In one embodiment of the present invention, the voice storage module includes a NOR Flash memory, which is connected to the WiFi module through an SPI interface to increase the voice data transmission speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the embodiments of the present application, the drawings required for use in the embodiments of the present application are briefly introduced below.

[0021] Figure 1 is an overall schematic diagram of the personalized voice control circuit;

[0022] Figure 2 is a circuit diagram of the power amplifier circuit;

[0023] Figure 3 A circuit diagram of the power supply voltage conversion circuit;

[0024] Figure 4 A circuit diagram of the control voltage conversion circuit, each key circuit and the indicator light circuit;

[0025] Figure 5 A circuit diagram of the microphone recording circuit;

[0026] Figure 6 A circuit diagram of a voice storage module;

[0027] Figure 7 Schematic diagram of the process of recording audio for the microphone. DETAILED DESCRIPTION

[0028] The following specific embodiments are merely explanations of the present application and are not limitations of the present application. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, as long as they are within the scope of the claims of the present application, they are protected by the patent law.

[0029] like Figure 1 It is shown that a personalized voice control circuit for a cooking utensil provided by an embodiment of the utility model includes a voice input module, a voice broadcast module, a main control module and a voice storage module, wherein the voice input module is used to obtain external voice, the voice broadcast module is used to broadcast voice information, the main control module is used to control the voice input module and the voice broadcast module, and the voice storage module is used to store preset voice information and externally written voice data. Among them, the voice input module includes a WiFi module, which is used to connect to an external server and / or an input microphone to receive an external voice signal; the voice storage module is connected to the WiFi module through a serial interface and is used to write external voice data; the main control module includes a main control MCU, which is connected to the WiFi module through a serial interface and is used to control the WiFi module to work in an output or write state; the voice broadcast module includes a power amplifier circuit and a broadcast speaker, and the WiFi module is connected to the power amplifier circuit and is used to control the working state of the power amplifier circuit using the working voltage of the WiFi module. In this embodiment, under the control of the main control MCU, the WiFi module can not only obtain external input voice data through an external server and / or an input microphone, and write the obtained voice data into the voice storage module, but also call the corresponding voice data from the voice storage module and output it to the voice broadcast module for broadcasting according to the instruction of the main control MCU. The input and output of voice data are directly realized through the WiFi module without the need for transfer through the main control MCU, which can improve the download and transmission efficiency of voice data, reduce the user waiting time, and enhance the user experience. In addition, the working voltage of the WiFi module is directly used to control the working state of the power amplifier circuit in the voice broadcast module, which can effectively reduce the power consumption of the power amplifier circuit, save electricity and extend the service life of the power amplifier circuit.

[0030] In this embodiment, the main control MCU and the WiFi module are connected through a serial interface, and the main control MCU sends the electrical signal to the WiFi module in the form of a serial port protocol, and the WiFi module performs corresponding actions after parsing the serial port protocol. In one embodiment, after the WiFi module switches to STA mode, it can connect to an external server through a router, and then download corresponding voice data according to the control instructions of the main control MCU.

[0031] Figure 5 It is shown that in one embodiment, the input microphone includes a microphone recording circuit. When it is necessary to receive an external voice signal through the input microphone, the main control MCU sends a control signal to the WiFi module. After receiving the control signal, the WiFi module turns on its own ADC function, thereby collecting the user's audio signal through the microphone recording circuit; further, the main control MCU in this embodiment is connected to a recording button circuit, and the user transmits a recording electrical signal to the main control MCU by triggering the recording button circuit. The main control MCU sends the recording electrical signal to the WiFi module in the form of a serial port protocol. After parsing the recording electrical signal, the WiFi module turns on its own ADC function and collects the user's audio signal through the microphone recording circuit. Figure 7 It is shown that the present embodiment is further improved. When the WiFi module turns on its own ADC function and is about to start collecting user audio information through the microphone recording circuit, the WiFi module can first send a control signal to the voice broadcast module to broadcast a recording prompt tone to prompt the user that recording is about to start; the recording electrical signal can be set to be generated by long pressing a button in the recording button circuit, and recording is performed during the long pressing of the recording button, and the recording ends when the recording button pops up.

[0032] Figure 2It is shown that in one embodiment, the working voltage of the WiFi module is 3.3V, and the WiFi module is connected to the enable input terminal of the power amplifier circuit to output a 3.3V or 0V voltage to the power amplifier circuit to control the power amplifier circuit to be disabled or enabled. In this embodiment, the working voltage of the WiFi module is 3.3V, and the WiFi module directly controls the working state of the power amplifier circuit with a working voltage of 3.3V. Compared with the main control MCU controlling the power amplifier circuit with a working voltage of 5V, it can reduce the power consumption of the power amplifier circuit, save electricity and extend the service life of the power amplifier circuit. Specifically, in this embodiment, the power amplifier circuit includes a power amplifier chip, for example, a TK8002D power amplifier chip can be used, the power amplifier circuit is connected to a power supply to power the power amplifier chip, and the WiFi module is connected to the enable input terminal of the power amplifier circuit, that is, connected to the enable pin of the power amplifier chip; when the WiFi module inputs a 3.3V voltage signal to the power amplifier circuit, the enable input terminal is high level, the power amplifier circuit is disabled, does not work, and reduces power consumption; when the WiFi module inputs a 0V voltage signal to the power amplifier circuit, the disable input terminal is low level, the power amplifier circuit is enabled, works normally, and performs voice broadcast. The voice storage module is used to store voice data. When the power amplifier circuit is enabled, the WiFi module reads the voice data from the storage module and transmits it to the power amplifier circuit through the DAC pin for voice broadcast; it should be noted that the voice data stored in the voice storage module is local voice data, including preset voice information and externally written voice data.

[0033] Figure 1 It is shown that in one embodiment, a power supply voltage conversion circuit and a control voltage conversion circuit are connected between the main control MCU and the WiFi module, which are used to convert the 5V working voltage and 5V control voltage output by the main control MCU into 3.3V working voltage and 3.3V control voltage respectively and input them into the WiFi module. In cooking appliances, in addition to being connected to the WiFi module, the main control MCU also needs to be connected to other electrical components, such as being connected to the driving circuit of the motor in a wall breaker. The main control MCU needs to output voltage signals to the above-mentioned electrical components for driving, and a 5V voltage signal is usually used for driving. If the driving voltage is less than 5V, it may affect the driving effect. Therefore, in this embodiment, the working voltage of the main control MCU is 5V. In this embodiment, the working voltage of the WiFi module is 3.3V, and it cannot receive a 5V voltage signal. Therefore, the 5V working voltage and 5V control voltage output by the main control MCU are converted into 3.3V working voltage and 3.3V control voltage respectively through a power supply voltage conversion signal and a control voltage conversion signal, and input them into the WiFi module, so that the WiFi module can work normally. Specifically, as Figure 3 , Figure 4It is shown that the power supply voltage conversion circuit described in this embodiment includes a power supply conversion chip, such as an AMS117 chip, which is used to convert a 5V voltage into a 3.3V voltage, as well as a filter capacitor for removing ripples in the circuit and a diode for preventing damage caused by reverse connection of the power supply; the control voltage conversion circuit described in this embodiment uses two MOS tube circuits for level conversion.

[0034] In one embodiment, the power amplifier circuit includes a power amplifier chip, such as a TK8002D power amplifier chip. The operating voltage of the power amplifier circuit is 5V, so that the output power of the power amplifier chip reaches 3W, ensuring the signal strength of the power amplifier circuit, so that the voice broadcast sound is loud enough to enhance the user experience.

[0035] In one embodiment, the main control MCU is connected to the WiFi module through a serial interface for the main control MCU and / or the WiFi module to detect the data transmission status. The main control MCU is used to control the WiFi module to enter a low power mode when the serial interface is idle or the WiFi module automatically enters a low power mode when the serial interface is idle. Since the WiFi module itself has a low power mode, in this embodiment, the main control MCU and the WiFi module are connected to each other through a serial interface so that the main control MCU and / or the WiFi module can detect the data transmission status between the two. The detection algorithm is implemented by programming in the main control MCU and / or the WiFi module. When the data transmission status of the serial interface is detected to be idle, the WiFi module does not need to work. At this time, the main control MCU controls the WiFi module to enter a low power mode by sending instructions, or the WiFi module automatically enters a low power mode to reduce the power consumption of the WiFi module.

[0036] In one embodiment, the voice storage module includes a NOR Flash memory, such as a GD25Q64C chip, which is connected to the WiFi module through an SPI interface to quickly transmit data. Figure 6A schematic diagram of a voice storage module is shown. NOR Flash is a non-volatile memory, which has a fast reading speed, low reading latency and good random access performance. The SPI interface has the advantage of a high data transmission rate. Therefore, in this embodiment, the NOR Flash is connected to the WiFi module through the SPI interface, which can effectively improve the data transmission speed. The maximum transmission speed can reach 480Mbit / s, reducing the user waiting time and improving the user experience. The storage unit in NOR Flash consists of a transistor and a charge storage area. By applying a voltage between the gate and source of the transistor, the storage and release of the charge can be controlled to represent the 0 and 1 of the data; NOR Flash has a parallel access structure, each storage unit has an address, and any storage unit can be directly accessed, which makes NOR Flash have fast random access capabilities, suitable for executing code and reading key data; NOR Flash has a fast reading speed, and the typical reading time is between tens of nanoseconds and several microseconds, and NOR Flash has low latency and can respond quickly to read requests.

[0037] In one embodiment, the WiFi module is connected to an external server, and the main control MCU is connected to a voice data online update key circuit. The voice data online update key circuit is used to transmit the update key electrical signal to the main control MCU. The main control MCU is used to control the WiFi module to switch to STA mode and download voice data from the external server to update the local voice data in the voice storage module, thereby providing users with more choices and improving user experience. In this embodiment, the WiFi module cannot directly connect to the Internet to download voice data, and needs to switch modes with the help of a mobile terminal to achieve networking. Specifically, when the user wants to update the voice data, the button of the voice data online update button circuit is first triggered, and the main control MCU is used to send the update button electrical signal to the WiFi module. The WiFi module turns on the AP mode or the BLE mode to enable the mobile terminal to be directly connected to the WiFi module BLE or connected to the AP of the WiFi module. The mobile terminal is used to send the WiFi name and password of the router to the WiFi module, and then the WiFi module switches to the STA mode and connects to the router, and connects to the external server through the router, so that the WiFi module can download voice data; after the WiFi module switches to the STA mode, the button of the online update button circuit can be triggered again, and the online update button circuit is used to transmit the secondary update button electrical signal to the main control MCU, and the main control MCU is used to encode the update button electrical signal into a serial port protocol and send it to the WiFi module through a serial interface. The WiFi module is used to parse the serial port protocol and download the corresponding voice data from the external server, and store the downloaded voice data in the voice storage module to achieve the update of the voice data and improve the user experience. Specifically, in this embodiment, the LPT270 WiFi module is preferred, with an operating frequency of 2.412GHz 2.484GHz, supporting 802.11b / g / n wireless standards, supporting HT20 / HT40, and the working mode can be switched between AP and STA, while supporting BLE Bluetooth function.

[0038] In one embodiment, the main control MCU is connected to a local voice data switching button circuit, and the local voice data switching button circuit is used to transmit the switching button electrical signal to the main control MCU, and the main control MCU is used to control the WiFi module to call the corresponding voice data from the voice storage module, switch different local voice data as the currently used voice data, and improve the user experience. In this embodiment, the local voice data switching button circuit is used to transmit the switching button electrical signal to the main control MCU, and the main control MCU is used to send the switching button electrical signal to the WiFi module in the form of a serial port protocol. The WiFi module stores the storage address of the current voice data in the voice storage module, and the storage address of the voice data in the voice storage module has an arrangement order. The WiFi module is used to parse the switching button electrical signal and switch the storage address of the current voice data to the storage address of the next voice data, so that the subsequent voice broadcast module will broadcast the next voice data after switching as the currently used voice data, meeting the personalized needs of voice broadcast; in this embodiment, the storage address of the currently used voice data can be continuously switched by continuously short pressing a single switching button.

[0039] Further improvements are made on the basis of the above-mentioned embodiment of the main control MCU connecting to the local switching button circuit of voice data to obtain an improved embodiment, wherein the main control MCU is connected to the voice data indicator circuit, and the voice data indicator circuit includes multiple indicator lights, and the multiple indicator lights correspond to different voice data addresses respectively, for indicating the type of voice data currently in use. In this embodiment, when a certain voice data is stored in the WiFi module at the storage address of the voice storage module, the corresponding indicator light in the voice data indicator circuit is lit, and the other indicator lights are off; when the WiFi module switches the storage address of the current voice data to the storage address of the next voice data, the indicator light corresponding to the next voice data is lit, and the other indicator lights are off; in specific implementation, different types of voice data are stored in different storage addresses, so that the type of the current voice data is indicated by the lighting of the indicator light, for example, the first storage address is male voice, the second storage address is female voice, the third storage address is child voice, etc.

[0040] In one embodiment, the main control MCU is connected to a display interaction module, and the display interaction module includes a voice data selection interface for users to switch local voice data or update online voice data. This embodiment provides an intuitive and visual voice data selection interface for users to use, which is convenient for users to select voice data, improves the efficiency of voice switching and voice updating, and enhances the user experience.

[0041] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A personalized voice control circuit for a cooking appliance, comprising a voice input module, a voice broadcast module, a main control module and a voice storage module, wherein the voice input module is used to obtain external voice, the voice broadcast module is used to broadcast voice information, the main control module is used to control the voice input module and the voice broadcast module to work, and the voice storage module is used to store preset voice information and externally written voice data, characterized in that: The voice input module includes a WiFi module for connecting to an external server and / or an input microphone to receive an external voice signal; The voice storage module is connected to the WiFi module via a serial interface and is used to write external voice data; The main control module includes a main control MCU, which is connected to the WiFi module through a serial interface and is used to control the WiFi module to work in an output or write state; The voice broadcast module includes a power amplifier circuit and a broadcast speaker. The WiFi module is connected to the power amplifier circuit and is used to control the working state of the power amplifier circuit using the working voltage of the WiFi module.

2. The personalized voice control circuit for a cooking appliance according to claim 1, characterized in that: The working voltage of the WiFi module is 3.3V. The WiFi module is connected to the enable input terminal of the power amplifier circuit and is used to output a 3.3V or 0V voltage to the power amplifier circuit to control the power amplifier circuit to be disabled or enabled.

3. The personalized voice control circuit of a cooking appliance according to claim 2, characterized in that: A power supply voltage conversion circuit and a control voltage conversion circuit are connected between the main control MCU and the WiFi module, which are used to convert the 5V working voltage and 5V control voltage output by the main control MCU into 3.3V working voltage and 3.3V control voltage respectively and input them into the WiFi module.

4. The personalized voice control circuit for a cooking appliance according to claim 1, characterized in that: The power amplifier circuit includes a power amplifier chip. The operating voltage of the power amplifier circuit is 5V, so that the output power of the power amplifier chip reaches 3W.

5. The personalized voice control circuit for a cooking appliance according to claim 1, characterized in that: The main control MCU is connected to the WiFi module through a serial interface for the main control MCU and / or the WiFi module to detect the data transmission status. The main control MCU is used to control the WiFi module to enter a low power consumption mode when the serial interface is idle or the WiFi module automatically enters a low power consumption mode when the serial interface is idle.

6. The personalized voice control circuit for a cooking appliance according to claim 1, characterized in that: The voice storage module includes a NOR Flash memory and is connected to the WiFi module through an SPI interface.

7. The personalized voice control circuit for a cooking appliance according to claim 1, characterized in that: The WiFi module is connected to an external server, the main control MCU is connected to a voice data online update key circuit, the voice data online update key circuit is used to transmit the update key electrical signal to the main control MCU, and the main control MCU is used to control the WiFi module to switch to STA mode and download voice data from the external server.

8. The personalized voice control circuit for a cooking appliance according to claim 1, characterized in that: The main control MCU is connected to a local voice data switching key circuit, and the local voice data switching key circuit is used to transmit a switching key electrical signal to the main control MCU, and the main control MCU is used to control the WiFi module to call the corresponding voice data from the voice storage module.

9. The personalized voice control circuit for a cooking appliance according to claim 8, characterized in that: The main control MCU is connected to a voice data indicator light circuit, and the voice data indicator light circuit includes a plurality of indicator lights, and the plurality of indicator lights correspond to different voice data addresses respectively, and are used to prompt the type of voice data currently in use.

10. The personalized voice control circuit for a cooking appliance according to claim 1, characterized in that: The main control MCU is connected to the display interaction module, and the display interaction module includes a voice data selection interface for allowing users to switch local voice data or update online voice data.

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