CN204928831U - Car networking systems based on on -vehicle LED and visible light communication - Google Patents
Car networking systems based on on -vehicle LED and visible light communication Download PDFInfo
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Abstract
The utility model provides a car networking systems based on on -vehicle LED and visible light communication, including visible light transmitter, free space optical pass module and visible optical receiver, the visible light transmitter includes transmitter MCU master control circuit unit, keying circuit unit and LED modulation drive circuit unit, free space optical pass module includes on -vehicle LED and photoelectric detector, it is thus clear that optical receiver includes receiver MCU master control circuit unit, photoelectricity and receives amplifier circuit unit and alarm. The simple structure of this system, easily the installation and maintenance is energy -concerving and environment -protective, safe and reliable, low cost has good market prospect.
Description
Technical field
The utility model relates to photoelectric communication field, is specifically related to a kind of car networked system based on vehicle LED and visible light communication.
Background technology
Light-emitting diode (LightEmittingDiode is called for short LED) has the advantages such as life of product is long, cost is low, brightness is high, electricity conversion is high, volume is little, is described as the lighting source of forth generation environmental protection.Compare with HID xenon headlight with orthodox car halogen regenerative-cycle headlamp, vehicle LED is more energy-conservation, more environmental protection, more durable, low-voltage dc power supply can drive, and load is little, disturbs weak, requires low to environment for use, better adaptability, is adopted by numerous car manufactures, and becomes rising star and the main force gradually.Because vehicle LED has higher response sensitivity, communication light source can be applied to.
Visible light communication technology (VisibleLightCommunication, VLC) be that the high speed light and shade blinking light utilizing LED device to send to be invisible to the naked eye is modulated and transmission information, then utilize photodiode to convert the light signal of reception to the signal of telecommunication, the information transmitted the most at last correctly receives.Visible light communication technology is as the emerging wireless light communication technology of one, and integrate illumination and communication, having wireless application frequency spectrum can directly license, without electromagnetic interference, fail safe is high, good confidentiality, message transmission rate advantages of higher, is subject to the attention of various countries, becomes a focus of research.
Car networked system, be the sensor technology of advanced person, the communication technology, data processing technique, network technology, automatic control technology, information publishing technology etc. are organically used with whole traffic management system and set up a kind of in real time, accurately, efficient communications and transportation integrated management and control system, realize management and the information service of intelligent transportation, significant to the development of intelligent transportation.
The research of current car networked system mainly adopts radio communication mode, there is following shortcoming: first, utilize the information transmission that technology for radio frequency realizes between automobile and automobile, easily electromagnetic interference is produced to precision equipments such as vehicle electronics navigation, thus cause the situations such as traffic accident; Secondly, be in for a long time in electromagnetic signal overlay environment, the radiation caused easily produces health effect to driver's health; Finally, the information that radio communication sends makes all automobiles be within the scope of its communication distance receive information, thus brings huge challenge to cloud computing processing platform process information of vehicles and " filtering cleaning " data.
The method that orthodox car carries out information transmission mainly contains two kinds, one is combinationally using of automobile lamp, as beat when needing to turn left or overtake other vehicles left steering lamp forwardly automobile send or the information of overtaking other vehicles, need to turn right or pulling over observing time beat right turn lamp forwardly automobile send the information of right-hand rotation or pulling over observing; Two is uses of loudspeaker, as when there being emergency before meeting, adopts prompting preceding vehicle of honking.Although these two kinds of methods are simply efficient, are the methods of carrying out information transmission between current automobile, but there is following shortcoming: first, the sound that loudspeaker send causes noise pollution to environment, often in urban district or night time often prohibit the use loudspeaker; Secondly, driver frequently notices that the car light of automobile all around easily causes physical fatigue, thus makes driver tired driving, decreased attention; Finally, often do not realize the sound flash alarm system information that fore-aft vehicle sends when driver attention declines, thus cause a lot of Traffic Accidents.
At present the research of visible light communication technology is mainly concentrated on to the research of basic theory, comprise the message transmission rate and the antijamming capability that adopt complicated high-order establishment coding techniques, balancing technique, diversity receiving technology etc. to increase system, also be in a jejune stage to the application study of visible light communication is less, mainly existing problems have: adopt the cost of the visible light communication system realization of complex modulation demodulation techniques realization and maintenance large; Serious by ambient noise interference, transmission range is short.
Utility model content
In order to overcome the defect existed in above-mentioned prior art, the purpose of this utility model is to provide a kind of car networked system based on vehicle LED and visible light communication, and this system configuration is simple, be easy to installation and maintenance, energy-conserving and environment-protective, safe and reliable, with low cost, there are good market prospects.
In order to realize above-mentioned purpose of the present utility model, the utility model provides a kind of car networked system based on vehicle LED and visible light communication, comprises VISIBLE LIGHT EMISSION machine, free space optical channel module and visible ray receiver,
Described VISIBLE LIGHT EMISSION machine comprises transmitter MCU main control circuit unit, key circuit unit and LED modulation drive circuit unit;
Described free space optical channel module comprises vehicle LED and photodetector;
Described visible ray receiver comprises receiver MCU main control circuit unit, opto-electronic receiver amplifier circuit unit and alarm unit;
Described key circuit unit output connects described transmitter MCU main control circuit unit input, described transmitter MCU main control circuit unit output connects described LED modulation drive circuit unit input, and described LED modulation drive circuit unit output connects described vehicle-mounted LED lamp; Described photodetector output connects described opto-electronic receiver amplifier circuit unit input, described opto-electronic receiver amplifier circuit unit output connects described receiver MCU main control circuit unit input, and described receiver MCU main control circuit unit output connects described alarm unit input;
Signal edit to be passed becomes digital electric signal to send to described transmitter MCU main control circuit unit by described key circuit unit, send to described LED modulation drive circuit unit after signal to be passed is carried out modulating-coding by described transmitter MCU main control circuit unit, the signal madulation to be passed received is visible light signal and is sent by vehicle LED by described LED modulation drive circuit unit; Described photodetector detects the visible light signal that described vehicle LED sends, and send to described opto-electronic receiver amplifier circuit unit, the visible light signal of reception is carried out demodulating and decoding, amplifies process by described opto-electronic receiver amplifier circuit unit, then send to described receiver MCU main control circuit unit, the signal received is informed driver by alarm unit by described receiver MCU main control circuit unit.
This car networked system solves the signal transmission between vehicle, and structure is simple, is easy to installation and maintenance, and energy-conserving and environment-protective, safe and reliable, with low cost, has good market prospects.
Further, described VISIBLE LIGHT EMISSION machine also comprises transmitter reset circuit unit and transmitter clock circuit unit, and the output of described transmitter reset circuit unit and transmitter clock circuit unit is all connected to the respective input of transmitter MCU main control circuit unit;
Described visible ray receiver also comprises receiver reset circuit unit and receiver clock circuit unit, and described receiver reset circuit unit is connected the respective input of described receiver MCU main control circuit unit with the output of receiver clock circuit unit.
Transmitter reset circuit unit, resets for giving VISIBLE LIGHT EMISSION machine; Transmitter clock circuit unit, for providing clock signal for VISIBLE LIGHT EMISSION machine.Receiver reset circuit unit is used for the reset of visible ray receiver, and receiver clock circuit unit is used for providing clock signal for visible ray receiver.
Further, described alarm unit comprises indicator light circuit unit, buzzer circuit unit and LCD display circuit unit, the control output end of described receiver MCU main control circuit unit connects described indicator light circuit unit respectively, the input of buzzer circuit unit and LCD display circuit unit.
Indicator light circuit unit is used for sending warning light signal, and buzzer circuit unit is used for sending alarm sound signal, and LCD display circuit unit is used for display alarm Word message.
Further, described LED modulation drive circuit unit comprises the first resistance and triode, described first resistance one end connects described transmitter MCU main control circuit unit signal output part, the other end connects the base stage of described triode, the grounded collector of described triode, its emitter connects the negative pole of described vehicle LED, and described vehicle LED positive pole is connected with power supply.This LED modulation drive circuit cellular construction is simple, is easy to install and safeguard, and it is little to take up room, and reduces the volume of this networked system.
Further, described free space optical channel module also comprises optical module, described optical module makes visible light signal transmit in the angular range of setting, in free space, send the visible light signal of carrying information to described photodetector, optical module is conducive to the complete transmission of visible light signal in space and reception.
Further, described optical module comprises prefocus cup and lens, described vehicle LED is positioned at described prefocus cup focus place, described lens are arranged at described photodetector front end, described photodetector is positioned at the light focal spot of described lens, the visible light signal that described vehicle LED sends is sent in free space after reflecting in described prefocus cup, through lens convergence and by described photoelectric detector.
Injection is collimated after reflection from the light of prefocus cup focus injection, improve illuminance, decrease decay, the visible ray of reflection penetrates with certain angle of reflection, ensure that the angle of radiation of illumination light, meet the dual-use function of communication and illumination, and the interference of the bias light that can effectively suppress car body to reflect.Lens converge visible light signal, add the illuminance that photodetector detects, and ensure that the transmission range of signal, are convenient to the reception of photodetector to visible light signal.
Further, blue light filtering glass is also provided with between described lens and photodetector.Because photodetector is comparatively fast slower to the response of the signals such as gold-tinted to the response of blue light signals.In order to make the peak value of communication be positioned near 456nm, blue wave band signal not flood by huge ambient noise and lost efficacy, be therefore provided with blue light filter glass.Blue light filtering glass be arranged so that except blue light signals by except, the stray light of its all band all filters, thus increases the receiving sensitivity of photodetector, increases the bandwidth of system, increases the antijamming capability of system simultaneously.
Further, described opto-electronic receiver amplifier circuit unit comprises the second resistance, slide-changing resistor, operational amplifier and voltage comparator, described photodetector positive pole connects two branch roads, article one, connect the positive terminal of described operational amplifier, another connects one end of described second resistance, described photodetector minus earth, coil one end of described slide-changing resistor connects power supply, other end ground connection, its sliding end connects the end of oppisite phase of described operational amplifier, the output of described operational amplifier connects described voltage comparator input, described voltage comparator output connects described receiver MCU main control circuit unit input.
This opto-electronic receiver amplifier circuit unit structure is simple, is easy to install and safeguard, and it is little to take up room, and reduces the volume of this networked system.
Preferably, described photodetector is blue light enhancement mode PIN photodiode G0606M-B.This photoconductive detector is with blue light filtering glass, and parasitic capacitance is little, frequency response is good.
Preferably, the opening diameter d of described prefocus cup
1scope is 140mm-150mm; Its diameter d of remaining silent
2scope is 20mm-30mm; The degree of depth h scope of described prefocus cup is 45-55mm; The angle of reflection S scope of described prefocus cup is 40-50 degree; Angle of reflection Ω when light injects to described prefocus cup from described vehicle-mounted LED lamp is less than 10 °.This light that prefocus cup focus place is penetrated can collimate injection after reflection, improves illuminance, reduces decay, and the visible ray of reflection also can ensure the angle of radiation of illumination light well simultaneously, makes vehicle LED meet illumination and communication function.
Of the present utility model by the transmitting illuminant of vehicle LED as visible light communication, adopt blue light enhancement mode PIN photodiode G0606M-B as the receiving terminal of visible light communication, transport information is encoded to digital electric signal by the VISIBLE LIGHT EMISSION machine sending signal car, again digital electric signal is modulated to visible light signal, and by sending prefocus cup on signal car, light beam is penetrated, make vehicle LED meet communication and the dual-use function thrown light on simultaneously.Loading lens and visible ray receiver on Received signal strength car, visible light signal through it converges on photodetector by lens, increase the receiving sensitivity of photodetector, the signal detected is amplified reduction by visible ray receiver, and carry out sound and light alarm by indicator light luminescence and buzzer sounding, LCD display circuit unit by traffic information display out simultaneously, achieve transport information and utilize vehicle LED real-time Transmission, automobile and automobile are coupled together by visible light communication, form the huge Internet, allow driver understand the traffic conditions of surrounding at any time.
The utility model has following beneficial effect to have:
1, the visible visible ray of living human eye is utilized to carry out information transmission, without electromagnetic interference, can with other accurate mobile units without complete compatibility;
2, the light safety that sends of LED is radiationless, effectively ensures the health of driver;
3, the reception car being only in the region of car launcher car light irradiation just can receive information, effectively alleviates the pressure of cloud computing processing platform process information of vehicles and " filtering cleaning " data;
4, utilize buzzer sound and the indicator light light that gives the alarm that gives the alarm to carry out sound and light alarm, and LCD information correctly show three kinds of effective measures and allows driver understand driving situation around; Driver is avoided to ignore unexpected situation on the horizon because fatigue causes decreased attention;
5, buzzer is positioned at automotive interior and the volume of the alarm song sent stands scope driver, can not bring noise pollution to surrounding environment, can not bring harm to the health of driver simultaneously;
6, only carrying out information transmission when there being unexpected situation, effectively can alleviate driver and often noting rearview mirror and the fatigue that causes.
Additional aspect of the present utility model and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present utility model.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present utility model and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is theory structure block diagram of the present utility model;
Fig. 2 is the circuit connection diagram of VISIBLE LIGHT EMISSION machine;
Fig. 3 is the circuit connection diagram of visible ray receiver;
Fig. 4 is the index path of free space optical channel module.
Wherein, 1-1 is transmitter MCU main control circuit unit, and 1-2 is key circuit unit, and 1-3 is transmitter clock circuit unit, and 1-4 is transmitter reset circuit unit, and 1-5 is LED modulation drive circuit unit; 2-1 is opto-electronic receiver amplifier circuit unit, and 2-2 is receiver MCU main control circuit unit, and 2-3 is receiver clock circuit unit, 2-4 is receiver reset circuit unit, 2-5 is indicator light circuit unit, and 2-6 is buzzer circuit unit, and 2-7 is LCD display circuit unit.
Embodiment
Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the utility model, and can not being interpreted as restriction of the present utility model.
In description of the present utility model, unless otherwise prescribed and limit, it should be noted that, term " installation ", " being connected ", " connection " should be interpreted broadly, such as, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be directly be connected, also indirectly can be connected by intermediary, for the ordinary skill in the art, the concrete meaning of above-mentioned term can be understood as the case may be.
As shown in Figure 1, the utility model provides a kind of car networked system based on vehicle LED and visible light communication, comprise VISIBLE LIGHT EMISSION machine, free space optical channel module and visible ray receiver, VISIBLE LIGHT EMISSION machine comprises transmitter MCU main control circuit unit 1-1, LED modulation drive circuit unit 1-5, key circuit unit 1-2, transmitter reset circuit unit 1-4 and transmitter clock circuit unit 1-3.
Free space optical channel module comprises vehicle LED, optical module and photodetector; Optical module comprises prefocus cup and lens.The opening diameter d of prefocus cup
1scope is 140mm-150mm; Its diameter d of remaining silent
2scope is 20mm-30mm; The degree of depth h scope of prefocus cup is 45-55mm; The angle of reflection S scope of prefocus cup is 40-50 degree; Angle of reflection Ω when light injects to prefocus cup from described vehicle-mounted LED lamp is less than 10 °, wherein with the opening diameter d of prefocus cup
1for 145mm; Its diameter d of remaining silent
2for 25mm; The degree of depth h of prefocus cup is 50mm; The angle of reflection S of prefocus cup is 45 degree is optimal values, adopts the prefocus cup of this numerical value that visible light signal can preferably be received by visible ray receiver the most accurately.
Visible ray receiver comprises receiver MCU main control circuit unit 2-2, opto-electronic receiver amplifier circuit unit 2-1, receiver reset circuit unit 2-4, receiver clock circuit unit 2-3 and alarm unit, alarm unit comprises indicator light circuit unit 2-5, buzzer circuit unit 2-6 and LCD display circuit unit 2-7.
Key circuit unit 1-2, the output of transmitter reset circuit unit 1-4 and transmitter clock circuit unit 1-3 is all connected to the respective input of transmitter MCU main control circuit unit 1-1.Transmitter MCU main control circuit unit 1-1 output connects LED modulation drive circuit unit 1-5 input, and LED modulation drive circuit unit 1-5 output connects vehicle-mounted LED lamp.
Vehicle LED is positioned at prefocus cup focal position place, lens are arranged at photodetector front end, photodetector is positioned at the light focal spot of lens, and the visible light signal that vehicle LED sends is sent in free space after reflecting in prefocus cup, through lens convergence and by photoelectric detector.
Specific works flow process is: photodetector output connects opto-electronic receiver amplifier circuit unit 2-1 input, and opto-electronic receiver amplifier circuit unit 2-1 output connects receiver MCU main control circuit unit 2-2 input.Receiver reset circuit unit 2-4 is connected the respective input of receiver MCU main control circuit unit 2-2 with the output of receiver clock circuit unit 2-3, the control end of receiver MCU main control circuit unit 2-2 connects indicator light circuit unit 2-5 respectively, the input of buzzer circuit unit 2-6 and LCD display circuit unit 2-7.
Wherein, transmitter MCU main control circuit unit 1-1 in the present embodiment and receiver MCU main control circuit unit 2-2 all selects single-chip microcomputer STC89C52, and photodetector selects band blue light filtering glass and the blue light enhancement mode PIN photodiode G0606M-B that parasitic capacitance is little, frequency response is good.Two kinds are divided into, fluorescent material LED (PC-LED) and red, green and blue LED (RGB-LED) according to LED structure type.Fluorescent material LED is the most widely used LED type, its principle utilizes blue-light excited yellow fluorescent powder to produce white light, its advantage is that structure is simple, cost is lower, modulation complexity is relatively low, its shortcoming is that modulation bandwidth is very low, not high to the availability of frequency spectrum of indoor environment, significantly limit the transmission rate of visible light communication system; Red, green and blue LED, red, green, blue three-color LED chip package is sent white light together, and its advantage is to have very high modulation bandwidth, may be used in high-speed communication, but the complexity of its modulation is higher.Three chips due to wayward RGB-LED keep colour stable to avoid flicker, and the LED of this system mainly adopts PC-LED.
As shown in Figure 2, wire is utilized to be connected successively by corresponding signal between each circuit unit of the VISIBLE LIGHT EMISSION machine of the present embodiment, wherein, the button of key circuit unit 1-2 connects P1 mouth and the earth terminal of the single-chip microcomputer STC89C52 transmitted on car, under the control sending the single-chip microcomputer STC89C52 on signal car, transport information is encoded into digital signal; Transmitter reset circuit unit 1-4 realizes the reset function of MCU Main Processing Unit from the RST pin input of the single-chip microcomputer STC89C52 sent signal car by reset key switching low and high level; Transmitter clock circuit unit 1-3 is made up of the crystal oscillator of 22.1184M and the electric capacity of two 30pF, for the single-chip microcomputer STC89C52 sent on signal car provides clock signal.
LED modulation drive circuit unit 1-5 comprises the first resistance R1 and triode Q1, first resistance R1 one end connects transmitter MCU main control circuit unit 1-1 signal output part, the base stage of other end connecting triode Q1, the grounded collector of triode Q1, its emitter connects the negative pole of vehicle LED, and vehicle LED positive pole is connected with power supply.
Here, the biasing circuit that triode Q1 is formed provides constant-current source for vehicle LED and drives it luminous, the low and high level that the TXD sending the single-chip microcomputer STC89C52 on signal car exports by controlling the light on and off of the working state control vehicle LED of triode, thus makes digital electric signal be modulated to visible light signal to send through vehicle LED.
As shown in Figure 3, wire is utilized to be connected successively by corresponding signal between each circuit unit of the visible ray receiver of the present embodiment, wherein, receiver reset circuit unit 2-4 realizes the reset function of MCU Main Processing Unit from the RST pin input of the single-chip microcomputer STC89C52 Received signal strength car by reset key switching low and high level; Receiver clock circuit unit 2-3 is made up of the crystal oscillator of 22.1184M and the electric capacity of two 30pF, for the single-chip microcomputer STC89C52 on Received signal strength car provides clock signal; Indicator light circuit unit forms indicator light circuit unit by the P1.0 pin serial connection of the single-chip microcomputer STC89C52 in the red indication LED of 1K resistance, 5 milliwatts and power supply and Received signal strength car; The circuit design of buzzer circuit unit 2-6 is: single-chip microcomputer P1.7 pin is connected with the base stage of a triode by 1K resistance, and buzzer one end connects this transistor collector, and the other end connects earth terminal, and the emitter of triode connects power supply; LCD display circuit unit 2-7 selects LCD1602 LCDs, wherein DB0 to the DB7 pin of LCD1602 connects respectively at the pin of the P0 mouth of the single-chip microcomputer STC89C52 on Received signal strength car, the RS of LCD1602, R/W, E pin is respectively at the P2.5 of the single-chip microcomputer STC89C52 on Received signal strength car, P2.6, P2.7 pin is connected.
Opto-electronic receiver amplifier circuit unit 2-1 comprises the second resistance R6, slide-changing resistor R7, operational amplifier, and voltage comparator, photodetector positive pole connects two branch roads, , a positive terminal for concatenation operation amplifier, another connects one end of the second resistance R6, photodetector minus earth, coil one end of slide-changing resistor R7 connects power supply, other end ground connection, the end of oppisite phase of its sliding end concatenation operation amplifier, the output of operational amplifier connects voltage comparator input, voltage comparator output connects the RXD pin of the single-chip microcomputer STC89C52 on Received signal strength car, here voltage comparator selects LM393.
Transmitter reset circuit unit 1-4 resets to VISIBLE LIGHT EMISSION machine; Transmitter clock circuit unit 1-3 provides clock signal for VISIBLE LIGHT EMISSION machine, the transport information that each button of key circuit unit 1-2 is corresponding concrete.
During this system works, the transport information that the key circuit unit 1-2 sending signal car will transmit is encoded into digital electric signal quickly and easily and sends to the single-chip microcomputer STC89C52 sent on signal car, here transport information has: left-hand rotation, right-hand rotation, brake hard, reversing, the warning against danger of vehicle, maintain safe distance, corresponding, under the control sending the single-chip microcomputer STC89C52 on signal car, the transport information such as left-hand rotation, right-hand rotation, brake hard, reversing, warning against danger, the signal that maintains safe distance is encoded into the digital signals such as character a, b, c, d, e, f.Send to LED modulation drive circuit unit 1-5 after the signal to be passed received is modulated by the single-chip microcomputer STC89C52 sent on signal car, the signal madulation after modulating-coding is visible light signal and is sent by the vehicle LED sending signal car by LED modulation drive circuit unit 1-5.Be sent in free space after being reflected in prefocus cup by the visible light signal transmitted, by the photoelectric detector of Received signal strength car after lens converge, and after visible light signal is converted to the signal of telecommunication, be sent to the opto-electronic receiver amplifier circuit unit 2-1 of Received signal strength car, the visible light signal of reception is carried out demodulation by opto-electronic receiver amplifier circuit unit 2-1, amplify process, then the single-chip microcomputer STC89C52 on Received signal strength car is sent to, single-chip microcomputer STC89C52 on Received signal strength car by the traffic information display that receives on LCD display circuit unit 2-7, single-chip microcomputer STC89C52 on Received signal strength car controls the work of indicator light circuit unit 2-5 and buzzer circuit unit 2-6 according to the transport information received, receiver reset circuit unit 2-4 resets to visible ray receiver, receiver clock circuit unit 2-3 provides clock signal for visible ray receiver.
Certainly, when selective light electric explorer, also other photodetector can be selected, and blue light filtering glass is set between lens and photodetector, thus make except blue light signals by except, the stray light of its all band all filters, thus increases the receiving sensitivity of photodetector, the bandwidth of increase system, increases the antijamming capability of system simultaneously.
Transport information is encoded by push-button unit by the utility model, visible ray is utilized to carry out wireless transmission by visible ray transmitter, the visible light signal received is carried out amplification reduction by visible ray receiver, and show on LCD, carry out sound and light alarm simultaneously and remind driver, make between automobile and automobile, to form the huge Internet, allow driver in driving procedure, understand traffic conditions at one's side at any time, there are energy-conserving and environment-protective, flexible layout, realizes simple, easy to maintenance, feature with low cost, a good basis is established in the application study for visible light communication.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present utility model or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and described embodiment of the present utility model, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present utility model and aim, scope of the present utility model is by claim and equivalents thereof.
Claims (10)
1., based on a car networked system for vehicle LED and visible light communication, it is characterized in that, comprise VISIBLE LIGHT EMISSION machine, free space optical channel module and visible ray receiver,
Described VISIBLE LIGHT EMISSION machine comprises transmitter MCU main control circuit unit, key circuit unit and LED modulation drive circuit unit;
Described free space optical channel module comprises vehicle LED and photodetector;
Described visible ray receiver comprises receiver MCU main control circuit unit, opto-electronic receiver amplifier circuit unit and alarm unit;
Described key circuit unit output connects described transmitter MCU main control circuit unit input, described transmitter MCU main control circuit unit output connects described LED modulation drive circuit unit input, and described LED modulation drive circuit unit output connects described vehicle-mounted LED lamp; Described photodetector output connects described opto-electronic receiver amplifier circuit unit input, described opto-electronic receiver amplifier circuit unit output connects described receiver MCU main control circuit unit input, and described receiver MCU main control circuit unit output connects described alarm unit input;
Signal edit to be passed becomes digital electric signal to send to described transmitter MCU main control circuit unit by described key circuit unit, send to described LED modulation drive circuit unit after signal to be passed is carried out modulating-coding by described transmitter MCU main control circuit unit, the signal madulation to be passed received is visible light signal and is sent by vehicle LED by described LED modulation drive circuit unit; Described photodetector detects the visible light signal that described vehicle LED sends, and send to described opto-electronic receiver amplifier circuit unit, the visible light signal of reception is carried out demodulating and decoding, amplifies process by described opto-electronic receiver amplifier circuit unit, then send to described receiver MCU main control circuit unit, the signal received is informed driver by alarm unit by described receiver MCU main control circuit unit.
2. a kind of car networked system based on vehicle LED and visible light communication according to claim 1, it is characterized in that, described VISIBLE LIGHT EMISSION machine also comprises transmitter reset circuit unit and transmitter clock circuit unit, and the output of described transmitter reset circuit unit and transmitter clock circuit unit is all connected to the respective input of transmitter MCU main control circuit unit;
Described visible ray receiver also comprises receiver reset circuit unit and receiver clock circuit unit, and described receiver reset circuit unit is connected the respective input of described receiver MCU main control circuit unit with the output of receiver clock circuit unit.
3. a kind of car networked system based on vehicle LED and visible light communication according to claim 1, it is characterized in that, described alarm unit comprises indicator light circuit unit, buzzer circuit unit and LCD display circuit unit, the control output end of described receiver MCU main control circuit unit connects described indicator light circuit unit respectively, the input of buzzer circuit unit and LCD display circuit unit.
4. a kind of car networked system based on vehicle LED and visible light communication according to claim 1, it is characterized in that, described LED modulation drive circuit unit comprises the first resistance and triode, described first resistance one end connects described transmitter MCU main control circuit unit signal output part, the other end connects the base stage of described triode, the grounded collector of described triode, its emitter connects the negative pole of described vehicle LED, and described vehicle LED positive pole is connected with power supply.
5. a kind of car networked system based on vehicle LED and visible light communication according to claim 1, it is characterized in that, described free space optical channel module also comprises optical module, described optical module makes visible light signal transmit in the angular range of setting, sends the visible light signal of carrying information to described photodetector in free space.
6. a kind of car networked system based on vehicle LED and visible light communication according to claim 5, it is characterized in that, described optical module comprises prefocus cup and lens, described vehicle LED is positioned at described prefocus cup focal position place, described lens are arranged at described photodetector front end, described photodetector is positioned at the light focal spot of described lens, the visible light signal that described vehicle LED sends is sent in free space after reflecting in described prefocus cup, through lens convergence and by described photoelectric detector.
7. a kind of car networked system based on vehicle LED and visible light communication according to claim 6, is characterized in that, be also provided with blue light filtering glass between described lens and photodetector.
8. a kind of car networked system based on vehicle LED and visible light communication according to claim 1, it is characterized in that, described opto-electronic receiver amplifier circuit unit comprises the second resistance, slide-changing resistor, operational amplifier and voltage comparator, described photodetector positive pole connects two branch roads, article one, connect the positive terminal of described operational amplifier, another connects one end of described second resistance, described photodetector minus earth, coil one end of described slide-changing resistor connects power supply, other end ground connection, its sliding end connects the end of oppisite phase of described operational amplifier, the output of described operational amplifier connects described voltage comparator input, described voltage comparator output connects described receiver MCU main control circuit unit input.
9. a kind of car networked system based on vehicle LED and visible light communication according to claim 1, it is characterized in that, described photodetector is blue light enhancement mode PIN photodiode G0606M-B.
10. a kind of car networked system based on vehicle LED and visible light communication according to claim 6, is characterized in that, the opening diameter d of described prefocus cup
1scope is 140mm-150mm; Its diameter d of remaining silent
2scope is 20mm-30mm; The degree of depth h scope of described prefocus cup is 45-55mm; The angle of reflection S scope of described prefocus cup is 40-50 degree; Angle of reflection Ω when light injects to described prefocus cup from described vehicle-mounted LED lamp is less than 10 °.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105050290A (en) * | 2015-08-27 | 2015-11-11 | 桂林理工大学 | Uninterrupted activated double-control visible light car lamp communication signal transmission device |
| CN105959022A (en) * | 2016-07-14 | 2016-09-21 | 京东方科技集团股份有限公司 | Vehicle-mounted interconnection apparatuses and methods, and vehicle |
| CN106059666A (en) * | 2016-07-20 | 2016-10-26 | 上海小糸车灯有限公司 | Automobile driving data interaction system based on LiFi (Light Fidelity) and vehicle signal lighting device thereof |
| CN110588773A (en) * | 2019-09-16 | 2019-12-20 | 山东沃华农业科技股份有限公司 | Harvester steering control system and harvester thereof |
| CN111181645A (en) * | 2020-02-01 | 2020-05-19 | 东莞智联光频科技有限公司 | LED lamp-based all-illumination integrated visible light mobile communication base station equipment |
| CN112423057A (en) * | 2020-11-26 | 2021-02-26 | 湖北大学 | Vehicle-mounted visible light data communication system |
| CN112874518A (en) * | 2021-01-19 | 2021-06-01 | 合肥索斯智能科技有限公司 | Vehicle-vehicle interconnection and anti-collision system based on visible light communication |
| CN113037382A (en) * | 2021-03-24 | 2021-06-25 | 新疆大学 | Hybrid multi-beam visible light link communication system and method for motorcade interconnection |
| CN113411128A (en) * | 2021-05-28 | 2021-09-17 | 上海电机学院 | Multi-channel parallel data transmission device based on visible light communication |
| CN115679856A (en) * | 2022-09-28 | 2023-02-03 | 昆明理工大学 | Method for detecting occurrence place of tunnel overtaking lane change behavior |
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2015
- 2015-09-30 CN CN201520773095.0U patent/CN204928831U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105050290A (en) * | 2015-08-27 | 2015-11-11 | 桂林理工大学 | Uninterrupted activated double-control visible light car lamp communication signal transmission device |
| CN105959022A (en) * | 2016-07-14 | 2016-09-21 | 京东方科技集团股份有限公司 | Vehicle-mounted interconnection apparatuses and methods, and vehicle |
| CN106059666A (en) * | 2016-07-20 | 2016-10-26 | 上海小糸车灯有限公司 | Automobile driving data interaction system based on LiFi (Light Fidelity) and vehicle signal lighting device thereof |
| CN110588773A (en) * | 2019-09-16 | 2019-12-20 | 山东沃华农业科技股份有限公司 | Harvester steering control system and harvester thereof |
| CN111181645A (en) * | 2020-02-01 | 2020-05-19 | 东莞智联光频科技有限公司 | LED lamp-based all-illumination integrated visible light mobile communication base station equipment |
| CN112423057A (en) * | 2020-11-26 | 2021-02-26 | 湖北大学 | Vehicle-mounted visible light data communication system |
| CN112874518A (en) * | 2021-01-19 | 2021-06-01 | 合肥索斯智能科技有限公司 | Vehicle-vehicle interconnection and anti-collision system based on visible light communication |
| CN113037382A (en) * | 2021-03-24 | 2021-06-25 | 新疆大学 | Hybrid multi-beam visible light link communication system and method for motorcade interconnection |
| CN113411128A (en) * | 2021-05-28 | 2021-09-17 | 上海电机学院 | Multi-channel parallel data transmission device based on visible light communication |
| CN115679856A (en) * | 2022-09-28 | 2023-02-03 | 昆明理工大学 | Method for detecting occurrence place of tunnel overtaking lane change behavior |
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