CN204257201U - A kind of intelligent drawer control system based on speech recognition - Google Patents

Abstract

The utility model relates to a kind of intelligent drawer control system based on speech recognition, comprises power module, embedded master controller, sound identification module, driving stepper motor module and action executing system; Power module, embedded master controller, sound identification module and driving stepper motor module integration are in one piece of PCB, described power module is action executing system power supply by signal wire, after the pwm signal that the I/O pin of embedded master controller produces by described driving stepper motor module amplifies, by the rotating of signal wire control step motor.The utility model can realize the switch by speech recognition controlled drawer, has good stability, phonetic recognization rate is high, anti-noise jamming ability is strong, structure is simple and the feature such as easy to use.

Description

A kind of intelligent drawer control system based on speech recognition

Technical field

The utility model relates to a kind of intelligent drawer control system based on speech recognition, belongs to Smart Home field.

Background technology

In some special cases, disabled person or a doctor lacking arm, directly can not strike open a drawer with the hand; Or when a people goes on business, travels in other places, can not strike because being busy with other things the drawer opened at one's side with the hand; Or have in shop of Chinese medicines and hold the little drawer of each taste Chinese medicine, the medicinal material needed for staff need be found by thickly dotted label.These, all can increase the difficulty of practical operation.

As everyone knows, language be the mankind most important, the most effective, the most the most frequently used with the communication form of most convenient, can this just easily allow people expect replacing traditional man-machine communication's mode with natural language.In general, man-machine speech communication is roughly divided into two kinds of situations: the first situation is machine speech, and people understands.Here it is " artificial face ", the i.e. Prof. Du Yucang of voice; The second situation is exactly people's speech, and machine is understood.Here it is " artificial ear ", i.e. the artificial cognition of voice and understanding.Speech recognition is phonetic synthesis comparatively, technically more complicated.

The introducing of linear forecast coding technology (LPC), the feature extraction of speech recognition is made to produce huge progress, dynamic time warping technology (DTW) is mature on the whole, propose vector quantization (VQ) and hidden Markov model (HMM) theory, achieve the particular person isolated voice recognition system based on linear prediction cepstrum coefficient and DTW technology, HMM model and artificial neural network (ANN) successful Application in speech recognition make the Research of Speech Recognition move towards further deeply.The develop rapidly of speech recognition technology and widespread use, make the intelligentized Furniture by speech recognition controlled, becomes one of important development direction of intelligentized Furniture design.

Utility model content

In order to solve the problem, the utility model provides a kind of intelligent drawer control system based on speech recognition; Object there are provided a kind of intelligent drawer control system based on speech recognition, and this device can realize unspecified person controls drawer opening and closing by sending specific voice.The instruction of speech recognition and the distance of speech recognition can set in a program as required, meet the use habit of different people in different occasion.

For achieving the above object, the technical solution adopted in the utility model is as follows: adopt STMicw Electronics STM32 as main control chip, sound identification module adopts the LD3320 voice recognition chip of ICRoute company, write signer-independent sign language recognition control program and download in main control chip, after powering on, after voice recognition chip receives voice by miaow head, communication is carried out by Serial Peripheral Interface (SPI) (SPI) with main control MCU, judge whether the voice received are consistent with the instruction of setting, if met, main control MCU produces the rotation of pwm signal rotating band screw rod stepper motor and realizes opening or closing of drawer.

Based on an intelligent drawer control system for speech recognition, comprise power module, embedded master controller, sound identification module, driving stepper motor module and action executing system;

Described power module, comprises Switching Power Supply and low difference voltage regulator; It is driving stepper motor module and action executing system power supply that family expenses 220V alternating voltage is converted to direct current 5V by Switching Power Supply; Low difference voltage regulator by 5V voltage by changing into the DC voltage of 3.3V, for embedded master controller and sound identification module are powered;

Described embedded master controller, it selects STM32 chip as main control MCU, adopts SWD pattern to download debugged program, uses CAT811 chip to reset to main control MCU during program heavy duty.Main control MCU and sound identification module carry out communication by Serial Peripheral Interface (SPI) (SPI);

Described sound identification module is made up of voice recognition chip and peripheral circuit thereof.Described voice recognition chip adopts LD3320 chip, and the peripheral circuit of described LD3320 chip comprises the microphone interface, voltage follower, signal amplification circuit and the A/D converter that are connected successively; External sound signal is converted into electric signal by described microphone interface, described voltage follower prevents the voltage signal distortion gathered, the feeble signal of collection is amplified by described signal amplification circuit without distortion, so that processing and process further, described A/D converter converts continuous print analog quantity (voltage signal collected) to discrete digital quantity by sampling.

Described driving stepper motor module adopts the driving circuit of bipolar stepping motor, and the driving circuit of described bipolar stepping motor uses eight transistors to drive two groups of phase places, can drive four-wire type or six line formula stepper motors simultaneously.

Described action executing system comprises stepper motor, ball screw and slide block, described stepper motor is two-phase six line stepper motor, described ball screw is made up of screw rod, nut and ball, its function is the motion that is in line by convert rotational motion, described ball screw and stepper motor are integrated by sleeve connection, and described slide block is fixed on the nut of ball screw.

Described power module, embedded master controller, sound identification module and driving stepper motor module integration are in one piece of PCB, described power module is action executing system power supply by signal wire, after the pwm signal that the I/O pin of embedded master controller produces by described driving stepper motor module amplifies, by the rotating of signal wire control step motor.

Advantage of the present utility model:

1, the utility model has liberated the both hands of people to a certain extent, only sends by unspecified person the opening and closing that specific voice just can realize drawer, facilitates the life of people, improve the quality of life;

2, the utility model is by arranging different identification voice to different drawers, if the drawer required for you can be opened rapidly in a lot of drawer and do not know set by you command content just directly cannot open drawer, also play protection privacy effect;

The features such as 3, the utility model has good stability, phonetic recognization rate is high, anti-noise jamming ability is strong, structure is simple and easy to use.

Accompanying drawing explanation

Fig. 1 is a kind of intelligent drawer control system figure based on speech recognition;

Fig. 2 is a kind of action executing system construction drawing based on speech recognition master controller;

In figure, 1, stepper motor, 2, slide block, 3, ball screw.

Embodiment

Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but embodiment of the present utility model is not limited thereto.

Embodiment 1: as shown in Figure 1, a kind of intelligent drawer control system based on speech recognition of this enforcement, comprises power module, embedded master controller, sound identification module, driving stepper motor module and action executing system;

Described power module, comprises Switching Power Supply and low difference voltage regulator LM1117-3.3; It is driving stepper motor module and action executing system power supply that family expenses 220V alternating voltage is converted to direct current 5V by Switching Power Supply; Low difference voltage regulator by 5V voltage by changing into the DC voltage of 3.3V, for embedded master controller and sound identification module are powered;

Described embedded master controller, it selects STM32F103C8T6 chip as main control MCU, adopts SWD pattern to download debugged program, uses CAT811 chip to reset to main control chip during program heavy duty.Main control MCU and voice recognition chip LD3320 carry out communication by Serial Peripheral Interface (SPI) (SPI);

Described sound identification module is made up of voice recognition chip and peripheral circuit thereof.Described voice recognition chip adopts LD3320 chip, the peripheral circuit of described LD3320 chip comprises microphone interface, voltage follower, signal amplification circuit, A/D converter, external sound signal is converted into electric signal by described microphone interface, described voltage follower prevents the voltage signal distortion gathered, the feeble signal of collection is amplified by described signal amplification circuit without distortion, so that processing and process further, described A/D converter converts continuous print analog quantity (voltage signal collected) to discrete digital quantity by sampling.Voice recognition chip LD3320 and main control MCU carry out communication by Serial Peripheral Interface (SPI) (SPI);

Described driving stepper motor module adopts the driving circuit of bipolar stepping motor, and the driving circuit of described bipolar stepping motor uses eight transistors to drive two groups of phase places, can drive four-wire type or six line formula stepper motors simultaneously.Described driving circuit adopts Darlington ULN2068 chip.

Described action executing system comprises stepper motor, ball screw and slide block, the model of described stepper motor is KH42HM2B115, be two-phase six line stepper motor, described ball screw is made up of screw rod, nut and ball, and its function is the motion that is in line by convert rotational motion; Described ball screw and stepper motor are integrated by sleeve connection, and described slide block is fixed on the nut of ball screw;

Described power module, embedded master controller, sound identification module and driving stepper motor module integration are in one piece of PCB, described power module is action executing system power supply by signal wire, after the pwm signal that the I/O pin of embedded master controller produces by described driving stepper motor module amplifies, by the rotating of signal wire control step motor.

The course of work of the present embodiment is as follows:

After powering on, by the speech recognition controlled download program that writes in main control chip STM32F103C8T6, the voice signal received is converted into digital signal by voice recognition chip LD3320 and peripheral circuit thereof, then communication is carried out with main control MCU by Serial Peripheral Interface (SPI) (SPI), judge whether the voice received are consistent with the instruction of setting, if all do not conformed to the instruction of setting, then do not perform any action, continue to wait for that sound produces; If met, then produce corresponding pwm signal according to the I/O pin of identified instruction control main control chip STM32 chip, pwm signal amplifies rear drive stepper motor forward or reverse by driving chip ULN2068, thus realizes the opening and closing of drawer.

Embodiment 2: as shown in Figure 2, a kind of action executing system based on speech recognition master controller of this enforcement, described action executing system comprises stepper motor, ball screw and slide block, the model of described stepper motor is KH42HM2B115, it is two-phase six line stepper motor, described ball screw is made up of screw rod, nut and ball, its function is the motion that is in line by convert rotational motion, described ball screw and stepper motor are integrated by sleeve connection, and described slide block is fixed on the nut of ball screw.Described action executing system is fixed on middle part immediately below drawer, wood screw is used to be connected with drawer by slide block, the pwm signal that the I/O pin of master controller STM32 produces amplifies rear drive stepper motor forward or reverse through driving chip ULN2068, make slide block advance relative to screw rod or retreat, thus realize drawer and open along guide rail or close.

Above-described embodiment is the present invention's preferably embodiment; but embodiment of the present utility model is not limited by the examples; change, the modification made under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.

Claims (1)

1., based on an intelligent drawer control system for speech recognition, it is characterized in that comprising power module, embedded master controller, sound identification module, driving stepper motor module and action executing system;

Described power module comprises Switching Power Supply and low difference voltage regulator; It is driving stepper motor module and action executing system power supply that family expenses 220V alternating voltage is converted to direct current 5V by Switching Power Supply; Low difference voltage regulator by 5V voltage by changing into the DC voltage of 3.3V, for embedded master controller and sound identification module are powered;

Described embedded master controller selects STM32 chip as main control MCU, adopts SWD pattern to download debugged program, uses CAT811 chip to reset to main control MCU during program heavy duty; Main control MCU and sound identification module carry out communication by serial peripheral equipment interface SPI;

Described sound identification module comprises voice recognition chip and peripheral circuit thereof; Described voice recognition chip adopts LD3320 chip, and the peripheral circuit of described LD3320 chip comprises the microphone interface, voltage follower, signal amplification circuit and the A/D converter that are connected successively; External sound signal is converted into electric signal by described microphone interface, and described voltage follower prevents the voltage signal distortion gathered, and the feeble signal gathered is amplified by described signal amplification circuit; The voltage signal that namely continuous print analog quantity collects by described A/D converter converts discrete digital quantity to by sampling;

Described driving stepper motor module adopts the driving circuit of bipolar stepping motor, and the driving circuit of described bipolar stepping motor uses eight transistors to drive two groups of phase places;

Described action executing system comprises stepper motor, ball screw and slide block, and described stepper motor is two-phase six line stepper motor, and described ball screw is made up of screw rod, nut and ball; Described ball screw and stepper motor are integrated by sleeve connection, and described slide block is fixed on the nut of ball screw;

Described power module, embedded master controller, sound identification module and driving stepper motor module integration are in one piece of PCB, described power module is action executing system power supply by signal wire, after the pwm signal that the I/O pin of embedded master controller produces by described driving stepper motor module amplifies, by the rotating of signal wire control step motor.