CN102307063A - Voice information notification system based on LED visible light - Google Patents
Voice information notification system based on LED visible light Download PDFInfo
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- CN102307063A CN102307063A CN201110284925A CN201110284925A CN102307063A CN 102307063 A CN102307063 A CN 102307063A CN 201110284925 A CN201110284925 A CN 201110284925A CN 201110284925 A CN201110284925 A CN 201110284925A CN 102307063 A CN102307063 A CN 102307063A
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Abstract
The invention discloses a voice information notification system based on LED visible light. The system comprises a voice signal emitter and a vehicle-mounted terminal receiving device. The voice signal emitter comprises a voice signal input, an audio signal amplification circuit, a voice signal modulation module, an on-off control circuit, an LED drive circuit and a visible light emitting device. The vehicle-mounted terminal receiving device is composed of a photoelectric converter, a preposition amplification circuit, a denoising and filter circuit, a voice signal demodulation module, an audio frequency power amplification circuit and a loudspeaker. And the visible light emitting device employs an LED light source and the receiving device is installed on a vehicle-mounted terminal. According to the invention, transmission of voice communication of a visible light is realized; moreover, the design is simple and the transmission can be realized only by a simplest OOK mode; besides, costs are low and the system has strong practicality.
Description
Technical field
The present invention relates to a kind of visible light communication system that utilizes visible light, relate in particular to the system that a kind of LED of utilization visible light carries out the voice messaging announcement.
Background technology
At present; There is light-emitting diode (LED) lighting technology of the title of " green illumination " to receive much concern; Extensively be used in aspects such as lighting source, display screen, back light, automobile lamp and Landscape Lighting; Than traditional lighting technology; It has environmental protection, size is little, low in energy consumption and characteristics such as long service life; Simultaneously, the high response sensitivity of LED and good modulating characteristic are allowed to condition at and realize when accomplishing illumination functions that voice communication becomes possibility.
As everyone knows, radio communication and application thereof have become one of most active research field of current information science technology.But most of wireless communication technologys are subject to shortcomings such as transmitting power, electromagnetic interference, such as these are related to the occasion of life as hospital and aircraft, just can not adopt radio-frequency technique.
In order to address the above problem; Someone has invented the apparatus and method (publication number: CN 101953097A) that uses visible light communication to transmit and receive data; Comprise visible light communication transceiver, luminaire and conversion equipment, console controller etc., but it is only limited to data and in Ethernet, transmits.
Summary of the invention
To the problems referred to above, the present invention proposes a kind of voice messaging notification system based on the LED visible light.It can be used in the LED traffic light systems, plays various informations, is used to the generation of reminding the driver, avoiding traffic accident.Also can be used in LED street lamp, LED billboard, LED display, the LED direction board, issue the needed voice messaging of some people.
Technical scheme of the present invention is: a kind of voice messaging notification system based on the LED visible light is made up of voice signal emitter and car-mounted terminal receiving system.Described voice signal emitter comprises voice signal input, amplifier circuit for sound frequency signal, voice signal modulation module, ON-OFF control circuit, led drive circuit, VISIBLE LIGHT EMISSION device; Described car-mounted terminal receiving system comprises optical-electrical converter, pre-amplification circuit, noise-removed filtering circuit, voice signal demodulation module, audio power amplifying circuit, loud speaker.The voltage controlled oscillator that described voice signal modulation module employing centre frequency is 100kHz carries out frequency modulation(FM).Described led drive circuit adopts constant-current source to drive.Described optical-electrical converter is selected photodiode S1787-04 for use.It is the phase-locked loop of 100kHz that described voice signal modulation module and voice signal demodulation module all adopt centre frequency.Described VISIBLE LIGHT EMISSION device adopts led light source.
Beneficial effect of the present invention: (1) the present invention designs LED-based visible light voice messaging notification system, through the modulation to voice signal, has realized the transmission of visible light voice communication.(2) simplicity of design of the present invention uses the simplest on-off keying (OOK) modulation system to realize, need not use any coded system, also need not use complicated modulation technique, and cost is lower, and very strong practicality is arranged.
Description of drawings
Fig. 1 is the overall construction drawing of a kind of voice messaging notification system based on the LED visible light provided by the invention.
Fig. 2 is the voice signal emitter block diagram of a kind of voice messaging notification system based on the LED visible light provided by the invention.
Fig. 3 is the car-mounted terminal receiving system block diagram of a kind of voice messaging notification system based on the LED visible light provided by the invention.
Embodiment
See also Fig. 1, the present invention includes the emitter of emission voice signal and the car-mounted terminal receiving system of received speech signal.Emitter mainly is installed in LED lamp one end, carries out the voice signal input, handles, modulates, and by the LED lamp signal that modulates is launched with form of light waves; Receiving system mainly is installed in vehicle front or top, is used to receive the light signal of LED lamp emission, and then carries out that opto-electronic conversion, the signal of telecommunication are handled, demodulation recovers former voice signal, through loudspeaker plays.
See also Fig. 2, the voice signal emitter of voice messaging notification system of the present invention comprises voice signal input, amplifier circuit for sound frequency signal, voice signal modulation module, ON-OFF control circuit, led drive circuit and LED lamp.Can import at the voice signal input and to be suitable for various voice signals; Because this signal is to have only several millivolts ultra-weak electronic signal; So need utilize amplifier circuit for sound frequency signal that it is amplified, regulate multiplication factor, voice signal can be amplified to the analog signal that is fit to modulation.Need be modulated to the certain frequency scope by the analog signal of amplifier circuit for sound frequency signal output just can transmit; So the back need connect voice signal modulation module (voltage controlled oscillator); It is actually a square-wave generator; Output frequency and input voltage are directly proportional, thereby convert voltage signal into frequency signal.For the voice signal demodulation module with the back is complementary, adopt the voltage controlled oscillator in the phase-locked loop circuit to carry out the voice signal modulation.Through regulating the resistance capacitance value of peripheral circuit, with the output center frequency modulation(FM) to about the 100kHz.Use the NMOS pipe as switch control, control the break-make of MOSFET by the frequency signal of phase-locked loop output, thereby come transmission signals through the light on and off of control LED lamp.Because signal frequency is higher, human eye can not felt the flicker of lamp.So far, the voice signal emitter has been accomplished voice signal has been launched with the mode of visible light.
See also Fig. 3, the car-mounted terminal receiving system of voice messaging notification system of the present invention comprises optical-electrical converter, pre-amplification circuit, noise-removed filtering circuit, voice signal demodulation module, audio power amplifying circuit and the loud speaker of playing usefulness.In the receiving circuit, use photodiode to receive the visible light signal that LED sends, and be converted into the signal of telecommunication.Pre-amplification circuit is used for amplifying photodiode and receives the ultra-weak electronic signal of coming, and the noise-removed filtering circuit is used for the noise and the interference that produce in the filtered signal transmission course, obtains smoother square-wave signal.Signal bandwidth should be selected the amplifier of appropriate bandwidth greatly about 100kHz, otherwise can influence the transmission of signal, cause can not be complete the primary speech signal that restores.Like this; Signal through after the amplification filtering just can carry out demodulation; Be complementary with the modulation module of front; Demodulation module uses phase-locked loop circuit equally; And centre frequency is transferred to 100kHz; Demodulate primary speech signal, the signal that demodulates can directly amplify through audio power amplifying circuit, just can drive the loud speaker sounding then.
In sum, above embodiment is only in order to technical scheme of the present invention to be described but not to its restriction; All based on above-mentioned basic ideas, do not break away from various changes and the modification done in this creation spirit and the scope, all should belong to the disclosed scope of the present invention.
Claims (6)
1. the voice messaging notification system based on the LED visible light is characterized in that, is made up of voice signal emitter and car-mounted terminal receiving system; Described voice signal emitter comprises voice signal input, amplifier circuit for sound frequency signal, voice signal modulation module, ON-OFF control circuit, led drive circuit, VISIBLE LIGHT EMISSION device; Described car-mounted terminal receiving system comprises optical-electrical converter, pre-amplification circuit, noise-removed filtering circuit, voice signal demodulation module, audio power amplifying circuit, loud speaker.
2. a kind of voice messaging notification system based on the LED visible light according to claim 1 is characterized in that, the voltage controlled oscillator that described voice signal modulation module employing centre frequency is 100kHz carries out frequency modulation(FM).
3. a kind of voice messaging notification system based on the LED visible light according to claim 1 is characterized in that, described led drive circuit adopts constant-current source to drive.
4. a kind of voice messaging notification system based on the LED visible light according to claim 1 is characterized in that described optical-electrical converter is selected photodiode S1787-04 for use.
5. a kind of voice messaging notification system based on the LED visible light according to claim 1 is characterized in that it is the phase-locked loop of 100kHz that described voice signal modulation module and voice signal demodulation module all adopt centre frequency.
6. a kind of voice messaging notification system based on the LED visible light according to claim 1 is characterized in that, described VISIBLE LIGHT EMISSION device adopts led light source.
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| CN201110284925A CN102307063A (en) | 2011-09-23 | 2011-09-23 | Voice information notification system based on LED visible light |
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| CN201110284925A CN102307063A (en) | 2011-09-23 | 2011-09-23 | Voice information notification system based on LED visible light |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102624453A (en) * | 2012-02-27 | 2012-08-01 | 郭丰亮 | Cabin network system based on light-emitting diode (LED) visible light |
| CN102723992A (en) * | 2012-06-06 | 2012-10-10 | 深圳光启创新技术有限公司 | Visible light signal transmission device based on keying modulation |
| CN102769492A (en) * | 2012-07-09 | 2012-11-07 | 中国人民解放军国防科学技术大学 | Mercury lamp array-based ultraviolet light emitting device and method |
| CN102916749A (en) * | 2012-10-18 | 2013-02-06 | 陈思源 | Light communication transmitting and receiving system |
| CN103152153A (en) * | 2013-03-21 | 2013-06-12 | 北京半导体照明科技促进中心 | Acoustic transmission system |
| CN103746739A (en) * | 2013-12-30 | 2014-04-23 | 北京国承万通信息科技有限公司 | Method and system for electronic equipment interaction |
| CN104485993A (en) * | 2014-11-25 | 2015-04-01 | 南昌大学 | Vehicular visible light wireless digital voice communication system |
| CN104601235A (en) * | 2014-12-31 | 2015-05-06 | 青岛黄海学院 | Audio signal visible light transmitting device |
| CN105530053A (en) * | 2014-09-30 | 2016-04-27 | 重庆长安汽车股份有限公司 | Self-adaptive receiving device and method based on LED vehicle lamplight communication |
| CN106168095A (en) * | 2016-06-20 | 2016-11-30 | 苏州迈奇杰智能技术有限公司 | A kind of photovoltaic phonetic warning automatically controls window |
| CN106330330A (en) * | 2016-10-26 | 2017-01-11 | 桂林理工大学 | Visible-light communication car light intercom device |
| CN106330311A (en) * | 2016-08-30 | 2017-01-11 | 上海大学 | Intelligent traffic police flashlight with directional sound propagation function |
| CN106506078A (en) * | 2016-10-26 | 2017-03-15 | 桂林理工大学 | A kind of visible light communication car light intercommunication method with License Plate |
| CN106559135A (en) * | 2015-09-25 | 2017-04-05 | 徐林 | Based on the information transceiving method of visible light communication, R-T unit and its system |
| CN108880680A (en) * | 2018-05-07 | 2018-11-23 | 张烁城 | A kind of voice-transmission system based on visible light |
| CN110212982A (en) * | 2019-07-19 | 2019-09-06 | 广东工业大学 | A kind of voice communication assembly based on visible light |
| CN113438024A (en) * | 2021-07-06 | 2021-09-24 | 董润泽 | Visible light communication system based on FPGA and CMOS camera |
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| CN101593436A (en) * | 2009-06-26 | 2009-12-02 | 江苏大学 | Blind traffic prompt system based on LED traffic lights visible light communication |
| CN101753214A (en) * | 2009-12-07 | 2010-06-23 | 路胜天 | Method and device for implementation of wireless communication via LED |
| CN202309713U (en) * | 2011-09-23 | 2012-07-04 | 天津工业大学 | Voice message notification system based on LED (Light Emitting Diode) visible light |
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2011
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| CN101593436A (en) * | 2009-06-26 | 2009-12-02 | 江苏大学 | Blind traffic prompt system based on LED traffic lights visible light communication |
| CN101753214A (en) * | 2009-12-07 | 2010-06-23 | 路胜天 | Method and device for implementation of wireless communication via LED |
| CN202309713U (en) * | 2011-09-23 | 2012-07-04 | 天津工业大学 | Voice message notification system based on LED (Light Emitting Diode) visible light |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102624453A (en) * | 2012-02-27 | 2012-08-01 | 郭丰亮 | Cabin network system based on light-emitting diode (LED) visible light |
| CN102723992A (en) * | 2012-06-06 | 2012-10-10 | 深圳光启创新技术有限公司 | Visible light signal transmission device based on keying modulation |
| CN102769492A (en) * | 2012-07-09 | 2012-11-07 | 中国人民解放军国防科学技术大学 | Mercury lamp array-based ultraviolet light emitting device and method |
| CN102916749A (en) * | 2012-10-18 | 2013-02-06 | 陈思源 | Light communication transmitting and receiving system |
| CN103152153A (en) * | 2013-03-21 | 2013-06-12 | 北京半导体照明科技促进中心 | Acoustic transmission system |
| CN103152153B (en) * | 2013-03-21 | 2016-08-03 | 北京半导体照明科技促进中心 | Sound transmission system |
| CN103746739A (en) * | 2013-12-30 | 2014-04-23 | 北京国承万通信息科技有限公司 | Method and system for electronic equipment interaction |
| CN103746739B (en) * | 2013-12-30 | 2017-06-20 | 北京国承万通信息科技有限公司 | The method and system of electronic equipment interaction |
| CN105530053A (en) * | 2014-09-30 | 2016-04-27 | 重庆长安汽车股份有限公司 | Self-adaptive receiving device and method based on LED vehicle lamplight communication |
| CN104485993B (en) * | 2014-11-25 | 2017-02-01 | 南昌大学 | Vehicular visible light wireless digital voice communication system |
| CN104485993A (en) * | 2014-11-25 | 2015-04-01 | 南昌大学 | Vehicular visible light wireless digital voice communication system |
| CN104601235A (en) * | 2014-12-31 | 2015-05-06 | 青岛黄海学院 | Audio signal visible light transmitting device |
| CN106559135A (en) * | 2015-09-25 | 2017-04-05 | 徐林 | Based on the information transceiving method of visible light communication, R-T unit and its system |
| CN106168095A (en) * | 2016-06-20 | 2016-11-30 | 苏州迈奇杰智能技术有限公司 | A kind of photovoltaic phonetic warning automatically controls window |
| CN106330311A (en) * | 2016-08-30 | 2017-01-11 | 上海大学 | Intelligent traffic police flashlight with directional sound propagation function |
| CN106506078A (en) * | 2016-10-26 | 2017-03-15 | 桂林理工大学 | A kind of visible light communication car light intercommunication method with License Plate |
| CN106330330A (en) * | 2016-10-26 | 2017-01-11 | 桂林理工大学 | Visible-light communication car light intercom device |
| CN106506078B (en) * | 2016-10-26 | 2019-04-12 | 桂林理工大学 | A kind of visible light communication car light intercommunication method with License Plate |
| CN108880680A (en) * | 2018-05-07 | 2018-11-23 | 张烁城 | A kind of voice-transmission system based on visible light |
| CN110212982A (en) * | 2019-07-19 | 2019-09-06 | 广东工业大学 | A kind of voice communication assembly based on visible light |
| CN113438024A (en) * | 2021-07-06 | 2021-09-24 | 董润泽 | Visible light communication system based on FPGA and CMOS camera |
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Application publication date: 20120104 |