CN211676285U - Voice control toy car system - Google Patents

Abstract

The utility model relates to a speech signal handles and intelligent control field, especially relates to a toy car speech control system, its characterized in that: the system comprises a voice recognition module, a DSP processor, a control object and a power supply module; the voice recognition module is an LD3320 chip and is used for recognizing an input voice signal to form a voice recognition signal; the DSP processor comprises a DSP chip of the TMS320VC5509A, the input end of the DSP chip is connected with the voice recognition module and is used for converting the voice recognition signal output by the voice recognition module into a control signal and sending the control signal to a control object of the toy car to execute a corresponding action command; the control object comprises a motor driving module, a temperature acquisition module, a music playing module and an LCD display module which are all connected with the DSP processor; the power supply module is used for providing working voltage for the voice recognition module, the DSP processor and the control object. The utility model overcomes the short board of the interactive plate of the existing person of toy man machine realizes the voice control of the toy car, and has high performance and low power consumption.

Description

Voice control toy car system

Technical Field

The utility model relates to an automatic speech recognition technology ASR and intelligent control field especially relate to a speech control toy car system.

Background

In recent years, with the improvement of the economic level of China, the disposable income of everyone is gradually improved, in addition, parents of the new generation 'after 80' are mostly educated with high level and the like, and the early education and entertainment problems of children are more emphasized, so the consumption willingness of toys is extremely high, and the toy provides power for the consumption increase of the toys. Due to the rapid development of the voice recognition technology, children toys are also increasingly introduced with the technology, new vitality is injected into the market of the children toys, the voice recognition is a cross subject, a high-tech technology for converting a voice signal into corresponding text or a command by a machine through a recognition and understanding process is related to the research field of multiple subjects, and research results in different fields contribute to the development of the voice recognition.

However, the functions realized by the voice control system in the current children toy market are still very mechanical and single, and good human-computer interaction is lacked; most of voice control modules in the prior art adopt TLV320AIC23, so that the processing process is complex and the cost is high; the toy car does not need an audio module with a complicated processing process, and the application range is small.

In view of the above, it would be desirable to provide a voice controlled toy vehicle system that overcomes the above-mentioned problems.

Disclosure of Invention

The utility model aims at providing a speech control toy car system overcomes the short slab of current toy car human-computer interaction plate, realizes toy car speech control, high performance low-power consumption.

For solving the above technical problem, the technical scheme of the utility model is that: the voice control toy car system comprises a voice recognition module, a DSP processor, a control object and a power supply module; the voice recognition module is an LD3320 chip and is used for recognizing an input voice signal to form a voice recognition signal; the DSP processor comprises a DSP chip of the TMS320VC5509A, the input end of the DSP chip is connected with the voice recognition module and is used for converting the voice recognition signal output by the voice recognition module into a control signal and sending the control signal to a control object of the toy car to execute a corresponding action command; the control object comprises a motor driving module, a temperature acquisition module, a music playing module and an LCD display module which are all connected with the DSP processor; the power supply module is used for providing working voltage for the voice recognition module, the DSP processor and the control object.

According to the scheme, the DSP processor is a minimum system taking a TMS320VC5509A fixed-point DSP chip of TI company as a core, and the DSP chip is an operation processing unit of a toy car system and is provided with 2 Multipliers (MAC) and 4 Accumulators (ACC); the Arithmetic Logic Units (ALU) with 40 bits and 16 bits are respectively arranged, so that the operational capability of the DSP is greatly improved; working under 144HZ, the instruction cycle can reach 6.94 ns; TMS320VC5509A provides a multi-channel buffer serial port MCBSP, and the DSP can be connected with other devices such as a DSP and a coder-decoder through the MCBSP; MCBSP has full duplex communication, double buffer data register, allow to transmit continuous data stream, can send the interrupt to CPU, send DMA event to DMA controller, can set up functions such as polarity of frame synchronization pulse and clock signal, greatly make things convenient for DSP to gather the audio signal, TMS320VC5509A is a special DSP treater of fixed point low-power consumption audio frequency based on TI C55x framework, reduce energy dissipation comprehensively when improving the degree of parallelism, high performance low-power consumption has been realized, simultaneously can burn the procedure to TMS320VC5509A through the USB interface and needn't rely on the simulator. The minimum DSP system selects a 20MHZ crystal oscillator and two 12pF capacitors to be connected to X1 and CLKIN pin terminals of TMS320VC5509A to form a crystal oscillator circuit; the 3.3V voltage, the key, the 10K resistor and the 10uF capacitor are respectively connected to the RST pin end to form a reset circuit.

According to the scheme, the voice recognition module further comprises a microphone connected to the input end of the LD3320 chip, sound signals are input through the MICP pin and the MICN pin of the LD3320 chip, and the voice recognition module is connected with the microphone and is used for collecting voice signals; the voice recognition technology provided by the LD3320 chip is a recognition technology based on a key word list, and the working process of the voice recognition technology is as follows: inputting voice through a microphone interface MIC, performing spectral analysis on the input voice to extract parameters representing voice characteristics of the input voice, comparing the parameters with template keywords, wherein each template keyword has a matching score, and finding out a keyword with the highest matching score as recognition output, wherein the voice recognition technology is carried by an LD3320 chip; an 8-bit parallel port of an LD3320 chip is connected with an ADCINA0-ADCINA7 of a DSP chip, an MD of the LD3320 chip is grounded, a/RDB and/WRB of the LD3320 chip are directly connected with a/XRD and/XWE of the DSP chip, a parallel port direct read-write mode is adopted for data transmission, address control lines A0 and/CSB of the LD3320 chip are connected with an A0 and an A1 of the DSP chip, an interrupt signal line/INTB and a reset signal line/RSTB of the LD3320 chip are connected with an/INT 0 external interrupt line and a reset line/RST of the DSP chip, and the DSP chip responds to a voice recognition result in time; the LD3320 chip is a non-specific human voice recognition chip designed and produced by ICRoute corporation, and does not need a user to perform recording training; a non-specific voice recognition module supporting an SPI interface and a parallel interface, an onboard microphone and an active crystal oscillator are convenient to realize voice recognition, voice control and man-machine conversation functions in electronic products, and a recognized key word list can be edited dynamically at will; the dynamically editable identification key word list can be immediately effective in the next identification only by transmitting the identified key words into the chip in the form of character strings; the LD3320 chip is provided with a feature extraction algorithm, 2 FIFO buffers are arranged in the LD3320 chip, data can be directly stored without being externally connected with any FLASH and RAM auxiliary chips, high-precision A/D and D/A channels are arranged in the LD3320 chip, a microphone is connected to an AD pin of the chip, and meanwhile, a sound file can be played, a built-in amplifier with 550mW is provided, and a user is supported to freely edit 50 key word strips: at the same time, the content of the 50 key words can be edited and updated at any time by the terminal user according to the scene requirements, and the recognition speed and the recognition rate are high.

According to the scheme, the motor driving module comprises an L298N chip and two motors connected to the output port of the L298N chip; the input pins IN1-IN4 of the L298N are respectively connected with GPIOA0/PWM1, GPIOA0/PWM2, GPIOA0/PWM3 and GPIOA0/PWM4 of the DSP chip so as to control the positive and negative rotation of the motor; the enable terminals ENA and ENB of the L298N are connected with GPIOA6 and GPIOA7 of the DSP chip to control the motor to stop rotating; the speed of a vehicle is regulated and controlled by adopting a PWM (pulse-width modulation) mode, the duty ratio is changed by changing the count value of a counter, the PWM implementation process is that when the PWM implementation process is initialized, the levels of four signal lines of a control motor are pulled down, a timer 1 is started and set to be in a counting mode, the timer is interrupted once every 0.25ms, counting is started in an interruption function, if the counting reaches the set value, the levels are pulled down, and the process is circulated; the L298N is a full-bridge driving chip with high voltage and large current, the frequency generated by the full-bridge driving chip is high, the L298N chip can respectively control two direct current motors and is provided with a control enabling end, the chip is used as a motor drive, the operation is convenient, the stability is good, the performance is good, the L298N is combined with a single chip microcomputer to realize the accurate control of the speed of the trolley, and the speed regulation mode has the advantages of good speed regulation characteristic, smooth regulation, wide speed regulation range, large overload capacity, capability of bearing frequent load impact, capability of realizing frequent stepless quick start, braking, reversal and the like.

According to the scheme, the temperature acquisition module adopts a DS18B20 digital temperature sensor, and a DS18B20 data input and output pin BQ is connected with GPIOA8 of a DSP chip to realize temperature information acquisition and transmission; the digital temperature sensor DS18B20 outputs digital signals, and has the characteristics of small volume, low hardware cost, strong anti-interference capability and high precision; the DS18B20 digital temperature sensor is convenient to wire, a unique single-wire interface mode is adopted, and when the digital temperature sensor is connected with a microprocessor, the microprocessor can realize the two-way communication with the DS18B20 only by one port wire; no peripheral elements are required in use; the temperature measuring range is-55 ℃ to +125 ℃, and the inherent temperature measuring error is 1 ℃; a working power supply: 3.0 to 5.5V/DC.

According to the scheme, the music playing module selects a SPEAKER output mode of the SPEAKER power amplifier, outputs monophonic sounds through the power amplifier through the SPON pin and the SPOP pin of the LD3320 chip, and is directly connected with the passive sound box. The audio part selects an MIC microphone to input sound signals through MICP and MICN pins of an LD3320 chip, is connected with the microphone, is connected to the microphone by utilizing the MIC of the LD3320 chip to directly collect the sound signals, and is connected with the LD3320 chip through positive and negative pins to complete the input work of the sound signals; the invention selects LD3320 chip with characteristic extraction algorithm and 2 FIFO buffers, which can directly store data without any FLASH and RAM auxiliary chip.

According to the above scheme, the LCD display module comprises a tri-state transceiver HD74HC245P and is connected with the tri-state transceiver

The display LCD19264 of the HD74HC245P, the display screen size of the LCD19264 is 192 × 64, and the display screen is composed of a row display control chip S6B0107, a column display control chip S6B0108 and auxiliary circuits thereof, and a display data RAM buffer area is arranged in the control chip; the DSP chip adopts a three-state transceiver HD74HC245P to drive an LCD19264 chip, GPIOB 6-GPIOB 13 of the DSP chip are connected with A1-A8 of HD74HC245P for data transmission, and data or state can be read from a display, and data or instructions can be written to the display; GPIOB14 of the DSP chip is used for controlling the flow direction of data HD74HC 245P; GPIOB 0-GPIOB 5 of the DSP chip are used for generating control signals for reading, writing and gating of the display, and the signals are transmitted from the DSP chip to the display in a single direction.

According to the scheme, the power supply types of the power supply module are 3.3V, 5V and 12V; the power supply module comprises a 12V storage battery and a TLV1117 voltage converter which is connected to the storage battery and used for converting 12V working voltage into 3.3V and 5V working voltage.

According to the scheme, the voice control intelligent toy car system further comprises a USB interface for connecting the DSP chip and the PC; the CCS software development system is connected with the target board through a JTAG (joint test action group) based scanning simulation interface, so that the debugging of the DSP software and hardware and the burning of programs are realized.

The utility model discloses following beneficial effect has: the utility model discloses a combining together TMS320VC 5509A's DSP chip and speech recognition module, utilizing the speech recognition module to control DSP's work decision-making, the utility model overcomes the function that speech control system on the present children's toys market realized is still very mechanical, more single scheduling problem, and the DSP chip of TMS320VC5509A reduces energy dissipation comprehensively when improving the depth of parallelism simultaneously, has realized high performance low-power consumption, realizes toy car speech control, overcomes the short slab of the current man of toy man machine interaction plate; the voice control can give the children a space for exerting imagination, is more suitable for family parent-child interaction, and is high in recognition speed and recognition rate.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic circuit diagram of a speech recognition module according to the present embodiment;

FIG. 3 is a schematic circuit diagram of a motor driving module according to the present embodiment;

FIG. 4 is a schematic circuit diagram of a temperature acquisition module in this embodiment;

fig. 5 is a schematic circuit diagram of the LCD module of the present embodiment.

Reference numerals: 1. a voice recognition module; 2. a DSP processor; 3. a control object; 301. a motor drive module; 302. a temperature acquisition module; 303. a music playing module; 304. an LCD display module; 4. a power supply module; 5. and a USB interface.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, the present invention relates to a voice control toy car system, which obtains a corresponding control command through the processing of a DSP chip after recognizing a voice signal through a non-specific voice recognition chip, so as to realize the functions of car running state, temperature acquisition, music playing, information display, etc., and the present invention includes a voice recognition module 1, a DSP processor 2, a control object 3 and a power module 4; the voice recognition module 1 is an LD3320 chip and is used for recognizing an input voice signal to form a voice recognition signal; the DSP processor 2 comprises a DSP chip of TMS320VC5509A, the input end of the DSP chip is connected with the voice recognition module 1, and the DSP chip is used for converting the voice recognition signal output by the voice recognition module 1 into a control signal and sending the control signal to a control object 3 of the toy car to execute a corresponding action command; the control object 3 comprises a motor driving module 301, a temperature acquisition module 302, a music playing module 303 and an LCD display module 304 which are all connected with the DSP processor 2; the power module 4 is used for providing working voltage for the voice recognition module 1, the DSP processor 2 and the control object 3.

The power supply types of the power supply module 4 are 3.3V, 5V and 12V; the power module 4 comprises a 12V storage battery and a TLV1117 voltage converter connected to the storage battery and used for converting 12V working voltage into 3.3V and 5V working voltage.

The voice control intelligent toy car system also comprises a USB interface 5 which is used for connecting the DSP chip and the PC; the CCS software development system is connected with the target board through a JTAG (joint test action group) based scanning simulation interface, so that the debugging of the DSP software and hardware and the burning of programs are realized.

The DSP processor 2 adopts a DSP chip with the model number of TMS320VC5509A, and after the ARS voice recognition technology of the LD3320 chip is used for carrying out spectrum analysis on voice signals, the recognition results are transmitted to the DSP chip to control each control object 3 to execute corresponding action commands and command execution operation: 1) the control of the running state of the toy car and the corresponding signal lamps is realized, the running state of the toy car can complete the control of starting/stopping/backing up, acceleration/deceleration and left turning/right turning, and when the toy car turns to the right, the LED lamp on the right side automatically flashes; when the trolley turns left, the left LED lamp automatically shines; when the trolley stops, the tail lamps are simultaneously lightened; the vehicle speed can be controlled by adjusting the PWM wave; 2) the vehicle-mounted music is played under the voice control through the music playing module 303, namely a loudspeaker, and the LCD display module 304 is driven to display music tracks; 3) and the temperature detection in the vehicle is controlled by voice, and the LCD module 304 is driven to display the current temperature value in the vehicle. The clock circuit selects a 20MHZ crystal oscillator and two 12pF capacitors to be connected to X1 and CLKIN pin ends of TMS320VC5509A to form a crystal oscillator circuit; the 3.3V voltage, the key, the 10K resistor and the 10uF capacitor are respectively connected to the RST pin end to form a reset circuit.

Referring to fig. 2, the speech recognition module 1 provides speech recognition technology provided by the LD3320 chip, which is recognition technology based on a key word list, i.e., ASR technology, and its working process is as follows: the method comprises the steps of inputting voice through a microphone interface MIC, performing spectrum analysis on the input voice to extract parameters representing voice characteristics of the input voice, comparing the parameters with preset template keywords, wherein each template keyword has a matching score, and finding out the keyword with the highest matching score as identification output. An 8-bit parallel port of an LD3320 chip is connected with an ADCINA0-ADCINA7 of a DSP, an MD is grounded, a/RDB and/WRB are directly connected with/XRD and/XWE of the DSP, data transmission is carried out by adopting a parallel port direct read-write mode, address control lines A0 and/CSB are connected with A0 and A1 of the DSP, meanwhile, an interrupt signal line/INTB, a reset signal line/RSTB and/INT 0 of the DSP are connected with an external interrupt 0 and a reset line/RST, the DSP can respond to a voice recognition result in time, and a clock signal adopts a 4M crystal oscillator signal.

Motor drive module 301 referring to fig. 3, two motors are connected to 4 output ports of OUT1, OUT2, OUT3, OUT4 of L298N; the input pins IN1-IN4 of the L298N chip are respectively connected with GPIOA0/PWM1, GPIOA0/PWM2, GPIOA0/PWM3 and GPIOA0/PWM4 of the DSP to control the positive and negative rotation of the motor; enable terminals ENA, ENB of L298N are connected to GPIOA6, GPIOA7 of the DSP to control motor stall.

Referring to fig. 4, the temperature acquisition module 302 employs a DS18B20 digital temperature sensor, and the DS18B20 data input/output pin BQ is connected to GPIOA8 of the DSP chip to acquire and transmit temperature information.

The music playing module 303 selects a SPEAKER output mode of SPEAKER power amplifier, outputs monophonic sound through the power amplifier through SPON and SPOP pins of the LD3320 chip, and is directly connected to the passive sound box.

Referring to fig. 5, the LCD display module 304 includes a tri-state transceiver HD74HC245P and a display LCD19264 connected to the tri-state transceiver HD74HC245P, the DSP chip drives the LCD19264 chip by using the tri-state transceiver HD74HC245P, GPIOB6 to GPIOB13 of the DSP chip are connected to a1 to A8 of HD74HC245P for data transmission, which can read data or state from the display and write data or instructions to the display; GPIOB14 of the DSP chip is used for controlling the flow direction of data HD74HC 245P; GPIOB 0-GPIOB 5 of the DSP chip are used for generating control signals for reading, writing and gating of the display, and the signals are transmitted from the DSP chip to the display in a single direction.

The foregoing is a more detailed description of the present invention that is presented in conjunction with specific embodiments, and it is not to be understood that the specific embodiments of the present invention are limited to these descriptions. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims (8)

1. A voice-controlled toy vehicle system, characterized by: the system comprises a voice recognition module (1), a DSP (digital signal processor) processor (2), a control object (3) and a power supply module (4); the voice recognition module (1) is an LD3320 chip and is used for recognizing an input voice signal to form a voice recognition signal; the DSP processor (2) comprises a DSP chip of TMS320VC5509A, the input end of the DSP chip is connected to the voice recognition module (1), and the DSP chip is used for converting the voice recognition signal output by the voice recognition module (1) into a control signal and sending the control signal to a control object (3) of the toy car to execute a corresponding action command; the control object (3) comprises a motor driving module (301), a temperature acquisition module (302), a music playing module (303) and an LCD display module (304) which are all connected to the DSP processor (2); the power supply module (4) is used for providing working voltage for the voice recognition module (1), the DSP processor (2) and the control object (3).

2. The voice-controlled toy vehicle system of claim 1, wherein: the voice recognition module (1) further comprises a microphone connected to the input end of the LD3320 chip, sound signals are input through the MICP and MICN pins of the LD3320 chip, and the voice recognition module is connected with the microphone and is used for collecting voice signals; the voice recognition technology provided by the LD3320 chip is a recognition technology based on a key word list, and the working process of the voice recognition technology is as follows: inputting voice through a microphone interface MIC, performing spectral analysis on the input voice to extract parameters representing voice characteristics of the input voice, comparing the parameters with template keywords, wherein each template keyword has a matching score, and finding out a keyword with the highest matching score as identification output; the 8-bit parallel port of the LD3320 chip is connected with the ADCINA0-ADCINA7 of the DSP chip, the MD of the LD3320 chip is grounded, the/RDB and/WRB of the LD3320 chip are directly connected with the/XRD and/XWE of the DSP chip, a parallel port direct read-write mode is adopted for data transmission, the address control lines A0 and/CSB of the LD3320 chip are connected with the A0 and A1 of the DSP chip, the interrupt signal line/INTB and the reset signal line/RSTB of the LD3320 chip are connected with the/INT 0 external interrupt line and the reset line/RST of the DSP chip, and the DSP chip responds to the voice recognition result in time.

3. The voice-controlled toy vehicle system of claim 1, wherein: the motor driving module (301) comprises an L298N chip and two motors connected to an output port of the L298N chip; the input pins IN1-IN4 of the L298N are respectively connected with GPIOA0/PWM1, GPIOA0/PWM2, GPIOA0/PWM3 and GPIOA0/PWM4 of the DSP chip so as to control the positive and negative rotation of the motor; enable terminals ENA and ENB of L298N are connected to GPIOA6 and GPIOA7 of the DSP chip to control motor stall.

4. The voice-controlled toy vehicle system of claim 1, wherein: the temperature acquisition module (302) adopts a DS18B20 digital temperature sensor, and a DS18B20 data input and output pin BQ is connected with GPIOA8 of the DSP chip to realize temperature information acquisition and transmission.

5. The voice-controlled toy vehicle system of claim 1, wherein: the music playing module (303) selects a SPEAKER output mode of the SPEAKER power amplifier, outputs monophonic sound through SPON and SPOP pins of the LD3320 chip and is directly connected with the passive sound box.

6. The voice-controlled toy vehicle system of claim 1, wherein: the LCD display module (304) comprises a three-state transceiver HD74HC245P and a display LCD19264 connected with the three-state transceiver HD74HC245P, the DSP chip drives the LCD19264 chip by adopting the three-state transceiver HD74HC245P, GPIOB 6-GPIOB 13 of the DSP chip are connected with A1-A8 of HD74HC245P for data transmission, data or state reading from the display and data or instruction writing to the display; GPIOB14 of the DSP chip is used for controlling the flow direction of data HD74HC 245P; GPIOB 0-GPIOB 5 of the DSP chip are used for generating control signals for reading, writing and gating of the display, and the signals are transmitted from the DSP chip to the display in a single direction.

7. The voice-controlled toy vehicle system of claim 1, wherein: the power supply module (4) comprises a 12V storage battery and a TLV1117 voltage converter which is connected with the storage battery and is used for converting 12V working voltage into 3.3V and 5V working voltage.

8. The voice-controlled toy vehicle system of claim 1, wherein: the voice control intelligent toy car system further comprises a USB interface (5) used for connecting the DSP chip and the PC.

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