CN202309713U - Voice message notification system based on LED (Light Emitting Diode) visible light - Google Patents
Voice message notification system based on LED (Light Emitting Diode) visible light Download PDFInfo
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- CN202309713U CN202309713U CN2011203579408U CN201120357940U CN202309713U CN 202309713 U CN202309713 U CN 202309713U CN 2011203579408 U CN2011203579408 U CN 2011203579408U CN 201120357940 U CN201120357940 U CN 201120357940U CN 202309713 U CN202309713 U CN 202309713U
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Abstract
The utility model discloses a voice message notification system based on LED (Light Emitting Diode) visible light. The voice message notification system comprises a voice signal transmitting device and a vehicle-mounted terminal receiving device, wherein the voice signal transmitting device comprises a voice signal input end, an audio signal amplifying circuit, a voice signal modulating module, a switch control circuit, an LED drive circuit and a visible light transmitting device; the vehicle-mounted terminal receiving device comprises a photoelectric transducer, a pre-amplifying circuit, a denoising filter circuit, a voice signal demodulating module, an audio power amplifying circuit and a loudspeaker; and the visible light transmitting device adopts LED lights (such as LED traffic lights, LED street lights, LED signboards and LED display screens), and a receiving device is mounted on a vehicle-mounted terminal.
Description
Technical field
The utility model relates to a kind of visible light communication system that utilizes visible light, relates 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 is 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.
The utility model content
To the problems referred to above, the utility model 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.
The technical scheme of the utility model 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.
The beneficial effect of the utility model: (1) the utility model 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) the utility model simplicity of design 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
The overall construction drawing of a kind of voice messaging notification system based on the LED visible light that Fig. 1 provides for the utility model.
The voice signal emitter block diagram of a kind of voice messaging notification system based on the LED visible light that Fig. 2 provides for the utility model.
The car-mounted terminal receiving system block diagram of a kind of voice messaging notification system based on the LED visible light that Fig. 3 provides for the utility model.
Embodiment
See also Fig. 1, the utility model comprises the emitter of launching 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 the described voice messaging notification system of the utility model 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, can voice signal 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 needs to 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 the described voice messaging notification system of the utility model 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 after the process amplification filtering just can carry out demodulation and the modulation module of front is complementary, and 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 only in order to the explanation the utility model technical scheme 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 scope disclosed in the utility model.
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203579408U CN202309713U (en) | 2011-09-23 | 2011-09-23 | Voice message notification system based on LED (Light Emitting Diode) visible light |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011203579408U CN202309713U (en) | 2011-09-23 | 2011-09-23 | Voice message notification system based on LED (Light Emitting Diode) visible light |
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| CN202309713U true CN202309713U (en) | 2012-07-04 |
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| CN2011203579408U Expired - Fee Related CN202309713U (en) | 2011-09-23 | 2011-09-23 | Voice message notification system based on LED (Light Emitting Diode) visible light |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102307063A (en) * | 2011-09-23 | 2012-01-04 | 天津工业大学 | Voice information notification system based on LED visible light |
| CN102983907A (en) * | 2012-12-06 | 2013-03-20 | 哈尔滨工业大学 | Visible light communication based data transmission system between computer and visible light transceiver |
| CN103532625A (en) * | 2013-10-14 | 2014-01-22 | 江苏大学 | White-light LED (light-emitting diode) speech signal communication transceiving system |
| CN103889105A (en) * | 2013-08-16 | 2014-06-25 | 深圳市奥拓光电科技有限公司 | Information indication LED street lamp system, street lamp thereof and supporting vehicle-mounted light receiving terminal |
| CN103986518A (en) * | 2014-06-04 | 2014-08-13 | 中国科学院半导体研究所 | Single-chip microcomputer voice frequency storing and broadcasting system and single-chip microcomputer voice frequency storing and broadcasting method based on visible light communication |
| CN104485993A (en) * | 2014-11-25 | 2015-04-01 | 南昌大学 | Vehicular visible light wireless digital voice communication system |
| CN106330311A (en) * | 2016-08-30 | 2017-01-11 | 上海大学 | Intelligent traffic police flashlight with directional sound propagation function |
| CN106846937A (en) * | 2017-03-10 | 2017-06-13 | 天津工业大学 | A kind of radiationless Antenatal training apparatus based on LED visible light communication technology |
| CN110212982A (en) * | 2019-07-19 | 2019-09-06 | 广东工业大学 | A kind of voice communication assembly based on visible light |
| CN113724516A (en) * | 2020-05-25 | 2021-11-30 | 苏州中明光电有限公司 | System for transmitting emergency traffic events |
-
2011
- 2011-09-23 CN CN2011203579408U patent/CN202309713U/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102307063A (en) * | 2011-09-23 | 2012-01-04 | 天津工业大学 | Voice information notification system based on LED visible light |
| CN102983907A (en) * | 2012-12-06 | 2013-03-20 | 哈尔滨工业大学 | Visible light communication based data transmission system between computer and visible light transceiver |
| CN102983907B (en) * | 2012-12-06 | 2016-01-20 | 哈尔滨工业大学 | Based on the security data transmission system of visible light communication between computer and visible light transceiver |
| CN103889105A (en) * | 2013-08-16 | 2014-06-25 | 深圳市奥拓光电科技有限公司 | Information indication LED street lamp system, street lamp thereof and supporting vehicle-mounted light receiving terminal |
| CN103532625A (en) * | 2013-10-14 | 2014-01-22 | 江苏大学 | White-light LED (light-emitting diode) speech signal communication transceiving system |
| CN103986518A (en) * | 2014-06-04 | 2014-08-13 | 中国科学院半导体研究所 | Single-chip microcomputer voice frequency storing and broadcasting system and single-chip microcomputer voice frequency storing and broadcasting method based on visible light communication |
| CN103986518B (en) * | 2014-06-04 | 2017-05-03 | 中国科学院半导体研究所 | Single-chip microcomputer voice frequency storing and broadcasting system and single-chip microcomputer voice frequency storing and broadcasting method based on visible light communication |
| CN104485993A (en) * | 2014-11-25 | 2015-04-01 | 南昌大学 | Vehicular visible light wireless digital voice communication system |
| CN104485993B (en) * | 2014-11-25 | 2017-02-01 | 南昌大学 | Vehicular visible light wireless digital voice communication system |
| CN106330311A (en) * | 2016-08-30 | 2017-01-11 | 上海大学 | Intelligent traffic police flashlight with directional sound propagation function |
| CN106846937A (en) * | 2017-03-10 | 2017-06-13 | 天津工业大学 | A kind of radiationless Antenatal training apparatus based on LED visible light communication technology |
| CN110212982A (en) * | 2019-07-19 | 2019-09-06 | 广东工业大学 | A kind of voice communication assembly based on visible light |
| CN113724516A (en) * | 2020-05-25 | 2021-11-30 | 苏州中明光电有限公司 | System for transmitting emergency traffic events |
| CN113724516B (en) * | 2020-05-25 | 2023-08-11 | 苏州中明光电有限公司 | System for transmitting emergency traffic event |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120704 Termination date: 20140923 |
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| EXPY | Termination of patent right or utility model |