A voice control device applied to a vehicle

Abstract

The utility model provides a kind of voice control device applied to car applied to the field of automobile voice control, the voice recognition system of the application using ADC+DSP+NPU+CPU composition can directly control the door lock switch and back compartment switch etc of car, also can be combined with other modules by the mode of serial communication, realize other control of vehicle, such as lifting glass window, air conditioning control etc., strong adaptability, wherein the mode of using DSP to denoise before using NPU to carry out voice recognition, can effectively improve voice recognition accuracy, through the design of compatible level direct drive and serial port data communication mode, applicability is strong, can be directly controlled, also can be cooperated with other modules to control, such as cooperate CAN bus to realize voice control corresponding function, practical and convenient, high adaptability, with market prospect, suitable for popularization and application.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of voice control of automobile, in particular to a voice control device applied to automobile. BACKGROUND

[0002] The existing automobile rear-end control cannot be quickly operated when hands are inconvenient during opening and closing actions, such as the tail door of the trunk, the lifting window, the door and the air conditioner control of the automobile rear-end. The existing solution on the market is inconvenient to use and has high cost. For example, the tail door of the trunk, the corresponding product on the market, such as the existing product "one foot kick" induction type door opening method, can also achieve the effect of opening and closing the tail door of the trunk. However, because the principle is to use microwave induction, it is inconvenient to use and difficult to open when using the foot stroke recognition by pressing the corresponding set position with the foot. The same problem also exists in opening the door. At present, many cars on the market support keyless entry. Once the user has both hands holding objects, it is very inconvenient to open or lock the car, and it is necessary to free one hand, which increases the difficulty of controlling the automobile rear-end equipment. Therefore, we propose a voice control device applied to automobile to solve the above problems. CONTENT OF THE UTILITY MODEL

[0003] The present application aims to solve the technical problem of poor operation convenience of the existing automobile rear-end control method. Compared with the prior art, a voice control device applied to automobile is provided, which comprises:

[0004] A microphone assembly comprising a plurality of parallelly arranged microphones, the plurality of microphones being arranged at the corresponding rear-end part of the vehicle body for picking up the voice information issued by the user;

[0005] An ADC chip connected with the microphone assembly for converting the user voice information picked up by the microphone assembly into a digital signal;

[0006] A DSP unit electrically connected with the ADC chip in series through an I2S protocol for processing the audio signal of the voice, including noise reduction processing;

[0007] An NPU unit electrically connected with the DSP unit in series through a BUS protocol for recognizing and analyzing the voice processed by the DSP unit to obtain corresponding information;

[0008] A CPU unit electrically connected with the NPU unit in series through the BUS protocol for receiving the information transmitted by the NPU unit and performing operation processing, and then outputting corresponding signals;

[0009] The back end is connected with the CPU unit, and the back end includes a car tail door controller and a window lifting controller. The CPU unit communicates with the back end through a level control signal or a serial port data. The CPU unit can output a level signal that is adapted to the hardware circuit of the back end, and the voltage is adapted to 3-20V. The back end is used to control the opening or closing of the car tail door and the lifting of the window according to the signal output by the CPU unit.

[0010] Further, the ADC chip has the following characteristics:

[0011] The voice information processed by the microphone assembly can be converted into a digital signal, and the conversion precision meets the precision requirements of the normal operation of the car voice control device.

[0012] Further, the DSP unit adopts a chip with high-efficiency audio signal processing capability, specifically:

[0013] The DSP unit can realize filtering and amplification processing operations on the voice audio signal. In addition to noise reduction processing, the processing parameters can be adjusted according to the actual needs of the car voice control to ensure that the quality of the output audio signal meets the processing requirements of the subsequent unit.

[0014] Further, the NPU unit has the following structure and functional characteristics:

[0015] The NPU unit has a structure that can be pre-set with corresponding instruction words. Users can control the operation of the back end of the car according to the pre-set instruction words. The NPU unit has a neural network architecture that can be flexibly configured according to different voice scenes and control requirements to realize accurate recognition and precise analysis of various voice information.

[0016] Further, the CPU unit is a high-performance microprocessor that meets the following performance requirements:

[0017] The main frequency of the CPU unit reaches a value that can ensure timely and accurate response to the control of the car tail door and the window. The CPU unit has fast data processing and instruction generation capabilities, and can accurately output adaptive level signals according to different needs of the back-end hardware circuit, and works stably in the voltage range of 3-20V.

[0018] Further, the car tail door controller has the following connection and control characteristics:

[0019] The car tail door controller is electrically connected with the electric drive mechanism of the car tail door. The car tail door controller can accurately receive the signal output by the CPU unit for controlling the opening or closing of the car tail door, and convert the signal into a control instruction for driving the electric drive mechanism of the car tail door to move, thereby realizing the smooth opening or closing of the car tail door.

[0020] Further, the window lifting controller has the following connection and control characteristics:

[0021] The application is electrically connected with the lifting driving mechanism of the automobile window, can accurately receive the signal output by the CPU unit for controlling the lifting of the automobile window, and convert the signal into a control instruction for driving the action of the lifting driving mechanism of the automobile window, so that the automobile window is lifted stably.

[0022] Compared with the prior art, the application has the following advantages:

[0023] The voice recognition system composed of ADC+DSP+NPU+CPU can directly control the door lock switch and the trunk switch of the automobile, and can also be combined with other modules through serial communication to realize other controls of the vehicle, such as lifting the glass window and controlling the air conditioner, and has strong adaptability. The method of using DSP to reduce noise first and then using NPU for voice recognition can effectively improve the voice recognition accuracy. Through the design of compatible level direct driving and serial data communication mode, the applicability is strong, and the voice control device can be directly controlled or cooperated with other modules to control, such as cooperating with the CAN bus to realize the corresponding functions of voice control, which is practical, convenient and highly adaptive. BRIEF DESCRIPTION OF DRAWINGS

[0024] Fig. 1 The hardware circuit diagram of the application is shown in the figure;

[0025] Fig. 2 The system block diagram of the application is shown in the figure. DETAILED DESCRIPTION

[0026] The embodiments will be described in the description of the drawings, and all other embodiments obtained by the person skilled in the art without creative labor based on the embodiments in the application belong to the scope of protection of the application. EMBODIMENT

[0027] The utility model provides a voice control device for automobile, please refer to Figs. 1-2 , comprising:

[0028] The microphone assembly includes a plurality of microphones arranged in parallel, and the plurality of microphones are arranged at the corresponding rear end of the vehicle body for picking up and processing the voice information emitted by the user;

[0029] The ADC chip is connected with the microphone assembly and is used for converting the user voice information processed by the microphone assembly into a digital signal;

[0030] The DSP unit is electrically connected with the ADC chip through I2S protocol and is used for processing the audio signal of the voice, including noise reduction processing;

[0031] The NPU unit is electrically connected with the DSP unit in series through a BUS protocol, and is used for recognizing and analyzing the voice processed by the DSP unit to obtain corresponding information.

[0032] The CPU unit is electrically connected with the NPU unit in series through a BUS protocol, and is used for receiving the information transmitted by the NPU unit and performing operation processing, and then outputting corresponding signals.

[0033] The backend is connected with the CPU unit, and the backend includes an automobile tailgate controller and a window lifting controller. The CPU unit communicates with the backend through a level control signal or a serial port data. The CPU unit can output a level signal suitable for the hardware circuit of the backend, and adapt to a voltage of 3-20V. The backend is used for controlling the opening or closing of the automobile tailgate and the lifting of the window according to the signal output by the CPU unit.

[0034] Further, the ADC chip has the following characteristics:

[0035] The ADC chip can convert the voice information processed by the microphone assembly into a digital signal, and the conversion precision meets the precision requirement required for normal operation of the automobile voice control device.

[0036] Further, the DSP unit adopts a chip with high-efficiency audio signal processing capability, specifically:

[0037] The DSP unit can realize filtering and amplification processing operations on the voice audio signal. In addition to noise reduction processing, the processing parameters can also be adjusted according to the actual needs of the automobile voice control to ensure that the quality of the output audio signal meets the processing requirements of the subsequent units.

[0038] Further, the NPU unit has the following structure and functional characteristics:

[0039] The NPU unit adopts a structure that can pre-set corresponding instruction words. Users can control the operation of the automobile backend according to the pre-set instruction words. The NPU unit has a neural network architecture that can be flexibly configured according to different voice scenes and control requirements to realize accurate recognition and precise analysis of various voice information.

[0040] Further, the CPU unit is a high-performance microprocessor that meets the following performance requirements:

[0041] The CPU unit has a main frequency that can ensure timely and accurate response to the control of the automobile tailgate and the window. The CPU unit has fast data processing and instruction generation capabilities, and can accurately output adaptive level signals according to different needs of the backend hardware circuit, and stably work in a voltage range of 3-20V.

[0042] Further, the automobile tailgate controller has the following connection and control characteristics:

[0043] The electric drive mechanism of the automobile tailgate is electrically connected, which can accurately receive the signal output by the CPU unit for controlling the opening or closing of the automobile tailgate, and convert it into a control instruction for driving the electric drive mechanism of the automobile tailgate to move, so as to realize the smooth opening or closing of the automobile tailgate.

[0044] Further, the car window lifting controller has the following connection and control characteristics:

[0045] The lifting drive mechanism of the automobile window is electrically connected, which can accurately receive the signal output by the CPU unit for controlling the lifting of the automobile window, and convert it into a control instruction for driving the lifting drive mechanism of the automobile window to move, so as to realize the smooth lifting of the automobile window.

[0046] When the user issues a voice command in the car, the microphone assembly arranged at the rear end of the car body starts to work, and multiple microphones work simultaneously to pick up the voice information issued by the user. Due to the reasonable layout of the microphones and the synergistic effect of multiple microphones, even in a complex acoustic environment in the car, the user's voice information can be accurately captured.

[0047] The picked-up voice information exists in the form of analog signals, which are transmitted to the ADC chip. The ADC chip accurately converts the received analog voice information into digital signals according to its high-precision analog-to-digital conversion function. The converted digital signals have high precision and can meet the requirements of subsequent processing units for voice data.

[0048] The digital signals obtained through the ADC chip are transmitted to the DSP unit through the I2S protocol. The DSP unit performs a series of processing on the audio signals of the voice, mainly including noise reduction processing, filtering processing and amplification processing, etc. Through these processing operations, the background noise in the voice signal is effectively removed, the clarity and recognizability of the voice signal are improved, and the subsequent voice recognition and analysis work can be more accurately performed.

[0049] The voice data processed by the DSP unit is transmitted to the NPU unit through the BUS protocol. The NPU unit uses its internally configurable neural network architecture to identify and analyze the voice data. It first determines whether the voice command issued by the user matches the instruction words in the preset instruction word library according to the preset instruction word library. If the match is successful, the NPU unit will further analyze the specific content of the voice command, such as whether to open the automobile tailgate or lift the window, and will pass the corresponding information obtained by the analysis to the CPU unit.

[0050] The CPU unit receives the information transmitted by the NPU unit, and further processes the information according to the high-performance computing and processing capability of the CPU unit. For example, according to the specific requirements of the voice instruction, in combination with the current state of the automobile (such as vehicle speed, door state, etc.), corresponding control instructions are generated. These control instructions are output in the form of level control signals or serial port data, so as to communicate with the automobile tail door controller and the window lifting controller at the rear end.

[0051] When the control instructions output by the CPU unit are transmitted to the automobile tail door controller and the window lifting controller at the rear end in the form of level control signals or serial port data, the automobile tail door controller and the window lifting controller respectively convert the received instructions into control instructions for driving the automobile tail door electric drive mechanism and the window lifting drive mechanism to act, so as to realize the control of the opening or closing of the automobile tail door and the lifting of the window according to the user voice instruction

[0052] In use, the first microphone performs sound pickup processing to receive the voice information sent by the user, converts the digital signal into a digital signal through an ADC chip, and sends the digital signal to the DSP unit. After receiving the digital signal, the DSP unit analyzes and performs noise reduction processing, and reduces the useless noise interference signal. After the noise reduction processing is completed, the NPU unit identifies and analyzes the voice to obtain corresponding instruction information and transmits the instruction information to the CPU unit for further processing. The CPU unit performs logical processing according to the recognized voice, and gives a preset information such as a door opening signal, which is usually triggered by a low level. However, different vehicle models often have different voltage levels. In order to cooperate with different vehicle models, the CPU unit gives a level signal, cooperates with the hardware circuit, and finally obtains a level signal that meets the requirements of the automobile, adapts to 3-20V voltage, and meets the requirements of various household automobiles on the market, thereby increasing the applicability of the application.

[0053] Furthermore, the number of microphones connected to the ADC chip is multiple in parallel, and the microphones are arranged at the corresponding rear end of the vehicle body, so as to improve the sensitivity of voice wake-up. For example, when the tail door opening action is controlled by voice outside the vehicle, the external microphone can achieve better sound pickup effect.

[0054] The voice recognition system composed of ADC+DSP+NPU+CPU can directly control the door lock switch and trunk switch of the automobile, and can also be combined with other modules through serial communication to realize other controls of the vehicle, such as lifting the glass window and controlling the air conditioner, and has strong adaptability. The method of using DSP to reduce noise first and then using NPU for voice recognition can effectively improve the voice recognition accuracy. Through the design of compatible level direct driving and serial data communication mode, the applicability is strong, which can directly control or cooperate with other modules to control, such as cooperating with the CAN bus to realize the corresponding functions of voice control. It is practical, convenient, high in adaptability, has market prospect, and is suitable for popularization and application.

[0055] The above is only the best implementation mode adopted by the application in combination with the current actual demand, but the protection scope of the application is not limited thereto.

Claims

1. A voice control device applied to a vehicle, characterized by, The application relates to an automobile voice control device. The application comprises: A microphone assembly comprising a plurality of parallelly arranged microphones arranged at a corresponding rear end of a vehicle body for picking up voice information of a user; An ADC chip connected with the microphone assembly for converting the voice information picked up by the microphone assembly into a digital signal; A DSP unit electrically connected with the ADC chip through an I2S protocol for processing the audio signal of the voice, including noise reduction processing; An NPU unit electrically connected with the DSP unit through a BUS protocol for recognizing and analyzing the voice processed by the DSP unit to obtain corresponding information; A CPU unit electrically connected with the NPU unit through a BUS protocol for receiving the information transmitted by the NPU unit and performing operation processing, and then outputting corresponding signals; 2. The voice control device for a vehicle according to claim 1, characterized by, A rear end connected with the CPU unit, wherein the rear end comprises an automobile tail door controller and a window lifting controller, the CPU unit communicates with the rear end through a level control signal or a serial port data, the CPU unit can output a level signal suitable for the hardware circuit of the rear end, and the voltage is 3-20V, and the rear end is used for controlling the opening or closing of the automobile tail door and the lifting of the window according to the signal output by the CPU unit. The ADC chip has the following characteristics:

3. The voice control device for a vehicle according to claim 1, characterized by, The voice information picked up by the microphone assembly can be converted into a digital signal, and the conversion precision meets the precision requirement of normal operation of the automobile voice control device. The DSP unit adopts a chip with high efficient audio signal processing capability, specifically:

4. The voice control device for a vehicle according to claim 1, characterized by, The chip can realize filtering and amplification processing operation on the audio signal of the voice, and can adjust the processing parameters according to the actual demand of the automobile voice control, so as to ensure that the quality of the output audio signal meets the processing requirement of the subsequent unit. The NPU unit has the following structural and functional characteristics:

5. The voice control device for a vehicle according to claim 1, characterized by, The NPU unit has the following structural and functional characteristics: The NPU unit has the following structural and functional characteristics:

6. The voice control device for a vehicle according to claim 1, wherein The CPU unit is a high-performance microprocessor meeting the following performance requirements: The CPU unit is a high-performance microprocessor meeting the following performance requirements:

7. The voice control device for a vehicle according to claim 1, characterized by, The automobile tail door controller has the following connection and control characteristics: The automobile tail door controller has the following connection and control characteristics: The window lifting controller has the following connection and control characteristics: The application is electrically connected with the lifting driving mechanism of the automobile window, can accurately receive the signal output by the CPU unit for controlling the lifting of the automobile window, and convert the signal into a control instruction for driving the action of the lifting driving mechanism of the automobile window, so that the automobile window is lifted stably.

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