CN203984609U - Based on the wireless sound box of LED visible light communication - Google Patents
Based on the wireless sound box of LED visible light communication Download PDFInfo
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- CN203984609U CN203984609U CN201420099486.4U CN201420099486U CN203984609U CN 203984609 U CN203984609 U CN 203984609U CN 201420099486 U CN201420099486 U CN 201420099486U CN 203984609 U CN203984609 U CN 203984609U
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Abstract
The utility model provides a kind of wireless sound box based on LED visible light communication, comprises loudspeaker casing, is provided with the visible ray receiving system for LED light signal being changed into audio signal in described loudspeaker casing; Described visible ray receiving system comprises successively the Fresnel Lenses that connects, visible ray receiver, audio decoder module, power amplifier, loud speaker and for the power module of power supply is provided to visible ray receiver, audio decoder module, power amplifier, loud speaker.The utility model technical costs is low, in illumination, takes into account communication, does not have electromagnetic radiation, and green safety is harmless, without radio-frequency spectrum certification, be difficult for forming and disturb, and equipment is simple with other communication technologys.
Description
Technical field
The utility model relates to communication technical field, relates in particular to a kind of wireless sound box based on LED visible light communication.
Background technology
Electronic product in life more and more from wired become wireless, from the radio receiver starting, to TV remote, mobile phone, then to wireless router, WIFI wireless network, then develop into the end products such as wireless mouse, Wireless Keyboard, wireless headset, wireless sound box.Select wirelessly as solution, its object is just to be free to pan.And conventional audio amplifier in use, due to the restriction of wire, its source of sound cannot depart from the certain limit of audio amplifier.And as multifunctional portable equipment, in the time carrying out voice output, cannot move and make user quite helpless.
The wireless technology that existing wireless sound box adopts mainly comprises FM, infrared, bluetooth, WiFi, 2.4G, kleer etc.But, in these technology, FM technology is early subject to the restriction of transmission bandwidth, the general tonequality of FM wireless technology is not good, and the sample rate of the highest 22kHz is referred to as " broadcast receiver tonequality ", and is easily interfered, in addition, FM wireless technology is very easily interfered, occurs string phenomenon frequently, and stability is not good enough, and confidentiality is poor; Infrared radio transmission bandwidth is high, but transmitting power has relatively high expectations, and also only has 10m left and right apart from maximum; Bluetooth transmission data volume is little; 2.4G has delay; WiFi power consumption is larger, expensive hardware; Kleer is also immature, and cost is high, seldom has practical product.
Utility model content
The purpose of this utility model is to solve the defect that above-mentioned prior art exists, provide a kind of tonequality good, be difficult for disturbed, low in energy consumption, cheap a kind of wireless sound box based on LED visible light communication.
Based on a wireless sound box for LED visible light communication, comprise loudspeaker casing, in described loudspeaker casing, be provided with the visible ray receiving system for LED light signal being changed into audio signal; Described visible ray receiving system comprises successively the Fresnel Lenses that connects, visible ray receiver, audio decoder module, power amplifier, loud speaker and for the power module of power supply is provided to visible ray receiver, audio decoder module, power amplifier, loud speaker.
Further, wireless sound box based on LED visible light communication as above, the inside of described loudspeaker casing is divided two-layer up and down by dividing plate, described Fresnel Lenses is arranged on the upper surface of loudspeaker casing, describedly see that optical receiver and audio decoder module are arranged on the upper strata of loudspeaker casing, described power module and power amplifier module are arranged on the lower floor of loudspeaker casing, and described loud speaker is embedded in the side of voice box casing.
Further, wireless sound box based on LED visible light communication as above, describedly see that optical receiver comprises successively the photodiode, low noise high speed amplifier, high-pass filtering amplifier, the triode inverter that connect, described photodiode is installed near the focal position of Fresnel Lenses.
Further, the wireless sound box based on LED visible light communication as above, described audio decoder module comprises single-chip microprocessor MCU, D/A converter, low pass filter, audio voltage amplifier.
Further, the wireless sound box based on LED visible light communication as above, described Fresnel Lenses diameter is 130mm, focal length is 50mm.
Further, wireless sound box based on LED visible light communication as above, the input of described visible ray receiving system connects the LED visible ray modulator for regulate LED light according to binary digital signal, and the input of LED visible ray modulator connects the audio coder for audio signal being changed into binary digital signal.
Further, the wireless sound box based on LED visible light communication as above, described audio coder comprises the low-pass filter amplifier, A/D converter, the single-chip microprocessor MCU that connect successively.
Further, the wireless sound box based on LED visible light communication as above, described LED visible ray modulator comprises that the LED connecting successively drives constant-current source, photoelectrical coupler, MOSFET FET switch circuit.
The beneficial effects of the utility model:
1, in illumination, take into account communication.
2, there is not electromagnetic radiation, harmless, can not cause Contamination of Electromagnetic Wave.
3,, without radio-frequency spectrum certification, be difficult for forming with other communication technologys and disturb, and equipment is simple, cost low (can take into account the expense of audio amplifier and indoor communications two aspects).
Brief description of the drawings
Fig. 1 is visible ray receiving system structure chart in the wireless sound box of the utility model based on LED visible ray;
Fig. 2 is the utility model audio decoder modular structure schematic diagram;
Fig. 3 is the utility model wireless sound box communication system architecture schematic diagram.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with the accompanying drawing in the utility model, technical scheme in the utility model is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
Fig. 1 is the utility model visible ray receiving system structural representation, as shown in Figure 1, the wireless sound box based on LED visible light communication that the utility model provides, comprises loudspeaker casing, is provided with the visible ray receiving system for LED light signal being changed into audio signal in described loudspeaker casing; Described visible ray receiving system comprises successively the Fresnel Lenses 11 that connects, visible ray receiver 12, audio decoder module 13, power amplifier 14, loud speaker 15 and for the power module 16 of power supply is provided to visible ray receiver 12, audio decoder module 13, power amplifier 14, loud speaker 15.The inside of described loudspeaker casing is divided two-layer up and down by dividing plate, described Fresnel Lenses 11 is arranged on the upper surface of loudspeaker casing, describedly see that optical receiver 12 and audio decoder module 13 are arranged on the upper strata of loudspeaker casing, described power module 16 and power amplifier module 14 are arranged on the lower floor of loudspeaker casing, and described loud speaker 15 is embedded in the side of voice box casing.Described audio amplifier is divided into two-layer up and down with dividing plate, Fresnel Lenses 11 is embedded in loudspeaker casing upper surface, allows light can see through Fei Nier lens 11 and shines into audio amplifier upper strata, and the effect of Fresnel Lenses is that light is focused on.
Further, wireless sound box based on LED visible light communication as above, describedly see that optical receiver 12 comprises successively the photodiode, low noise high speed amplifier, high-pass filtering amplifier, the triode inverter that connect, described photodiode is installed near the focal position of Fresnel Lenses.
Particularly, the visible ray receiver that is installed on voice box casing upper strata comprises following device: photodiode, low noise high speed amplifier, high-pass filtering amplifier, triode inverter.Wherein, photodiode is installed near the focal position of Fresnel Lenses, so that photodiode can receive the visible ray of relatively high power, the negative electrode of photodiode connects positive source (VCC), and resistance of anode series is to ground (GND).The input signal of low noise high speed amplifier is drawn from the anode of photodiode, the input of the output termination high-pass filtering amplifier of low noise high speed amplifier, the input of the output termination triode inverter of high-pass filtering amplifier.The input of the output termination audio decoder module of triode inverter.
Further, Fig. 2 is the utility model audio decoder modular structure schematic diagram, and as shown in Figure 2, described audio decoder module 13 comprises single-chip microprocessor MCU 131, D/A converter 132, low pass filter 133, audio voltage amplifier 134.
Particularly, described audio decoder module 13 comprises single-chip microprocessor MCU, D/A converter, low pass filter, audio voltage amplifier.The digital signal of triode inverter output is input to single-chip microcomputer inside from the serial ports of single-chip microcomputer and processes, and Single-chip Controlling D/A converter converts digital signal to simulated audio signal, is connected to the input of audio voltage amplifier after low pass filter.
The output of the input termination audio voltage amplifier of power amplifier 14.Power amplifier circuit adopts integrated Audio power amplifier chip.The output of power amplifier is connected to loud speaker.Power module converts electric main to direct current to whole audio amplifier power supply, comprises power transformer, bridge rectifier, capacitor filter, integrated voltage-stabilized chip circuit etc.
Further, the wireless sound box based on LED visible light communication as above, described Fresnel Lenses 11 diameters are 130mm, focal length is 50mm.
Further, Fig. 3 is the utility model wireless sound box communication system architecture schematic diagram; As shown in Figure 3, the input of described visible ray receiving system 1 connects the LED visible ray modulator 2 for regulate LED light according to binary digital signal, and the input of LED visible ray modulator 2 connects the audio coder 1 for audio signal being changed into binary digital signal.Described audio coder comprises the low-pass filter amplifier, A/D converter, the single-chip microprocessor MCU that connect successively.Described LED visible ray modulator comprises that the LED connecting successively drives constant-current source, photoelectrical coupler, MOSFET FET switch circuit.
Particularly, described LED visible ray modulator comprises that LED drives constant-current source, photoelectrical coupler, field effect transistor MOSFET.It is a two-port network that LED drives constant-current source, and the function of network is for being that electric main is converted to can direct driving LED constant-current source.LED drives Constant current input mouth to connect electric main, delivery outlet is that an outflow of bus current end and an electric current flow to end, and outflow of bus current end and electric current flow to and between end, be connected in series the drain electrode (D) of a control switch (K), LED lamp, field effect transistor (Q), the source electrode (S) of field effect transistor (Q).The electrify effect of air bound information number coupling of photoelectrical coupler, the digital signal of its input reception modulation, output connects the grid (G) of field effect transistor (Q), allows the on off state in high speed between the drain electrode (D) of field effect transistor (Q) and source class (S).Thereby make the high speed flicker of binary digital signal control LED, lamp is bright when signal is " 1 ", and during for " 0 ", lamp goes out, and then realize visible ray on-off keying (OOK) modulation of digital signal.Because the flicker frequency of lamp is very fast, human eye cannot be discovered the flicker of lamp, can not cause the discomfort of human eye.Described audio coder comprises low-pass filter amplifier, A/D converter, single-chip microcomputer (MCU), data output interface.The input of low-pass filter amplifier is input audio signal, the output of the input termination low-pass filter amplifier of A/D converter.Single-chip microcomputer (MCU) is controlled the simulated audio signal of A/D converter after to filter and amplification and is sampled, and sampled data is stored in single-chip microcomputer RAM, opens microcontroller serial port sending function, and the data that read in RAM are exported from microcontroller serial port.
In sum, described audio coder, LED visible ray modulator, built-in visible ray receiving mechanism become the communication system of the utility model wireless sound box.The audio signal such as voice, music is input to audio coder and converts binary digital signal to, and digital signal is input to LED visible ray modulator, and light is radiated in space after ovennodulation.The visible ray receiver of built in sound box converts light signal after the signal of telecommunication to the audio signal of giving audio decoder and be reduced into simulation through signal condition, judgement reconstruct, and the audio signal of simulation is delivered to loud speaker and play after power amplification.
Set forth the utility model below by specific embodiment:
Described single-chip microcomputer uses MSP430F169, and A/D converter and D/A converter all use A/D converter and the D/A converter of single-chip microcomputer inside.Described low pass filter all adopts MAX295 integrated switched capacitor filtering chip, and the cut-off frequency of MAX295 low pass filter is directly proportional to its clock signal frequency, and ratio is 1:50, and the clock signal of MAX295 is provided by the PWM output of single-chip microcomputer.
Single-chip microcomputer is sampled with the sample frequency of 20KHz to the audio signal through low-pass filtering, and sampled data is cached in single-chip microcomputer RAM, calls single-chip microcomputer asynchronous serial port program, and data are read with the speed of 400Kbps and exported from microcontroller serial port from RAM.
Photoelectrical coupler in LED visible ray modulation module adopts 6N137 high speed photo coupling institute, and field effect transistor adopts IRF830.Digital signal is inputted from fet gate, and the drain electrode of IRF830 and source electrode, in speed-sensitive switch state, are realized on-off keying (OOK) modulation to digital signal.
Fresnel Lenses diameter is 130mm, and focal length is 50mm.
Photodiode in visible ray receiver uses SRD00111Z, and low noise high speed amplification chip adopts OPA642, and triode inverter adopts 9018 triodes to build an inverter, and signal, is exported from collector electrode from the input of triode ground level through a resistance.Transistor collector is connected in series a resistance to positive source.The speed-up capacitor of a 0.1 micro-weight in parallel at base resistance two ends.
The digital signal of triode inverter output is input to single-chip microcomputer inside from microcontroller serial port and processes.Microcontroller serial port receives with the speed of 400Kbps.The data that single-chip microcomputer receives are carried out D/A conversion again and low-pass filtering is audio decoder process.
Decoded audio signal is delivered to audio voltage amplifier OPA2134 and is carried out voltage amplification.
Delivering to TDA2030 integrated audio power amplifier through the audio signal of voltage amplification carries out power amplification and is connected to loud speaker again.
Finally it should be noted that: above embodiment only, in order to the technical solution of the utility model to be described, is not intended to limit; Although the utility model is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these amendments or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of the each embodiment technical scheme of the utility model.
Claims (7)
1. the wireless sound box based on LED visible light communication, comprises loudspeaker casing, it is characterized in that, is provided with the visible ray receiving system for LED light signal being changed into audio signal in described loudspeaker casing; Described visible ray receiving system comprises successively the Fresnel Lenses that connects, visible ray receiver, audio decoder module, power amplifier, loud speaker and for the power module of power supply is provided to visible ray receiver, audio decoder module, power amplifier, loud speaker; The inside of described loudspeaker casing is divided two-layer up and down by dividing plate, described Fresnel Lenses is arranged on the upper surface of loudspeaker casing, describedly see that optical receiver and audio decoder module are arranged on the upper strata of loudspeaker casing, described power module and power amplifier module are arranged on the lower floor of loudspeaker casing, and described loud speaker is embedded in the side of voice box casing.
2. the wireless sound box based on LED visible light communication according to claim 1, it is characterized in that, describedly see that optical receiver comprises successively the photodiode, low noise high speed amplifier, high-pass filtering amplifier, the triode inverter that connect, described photodiode is installed near the focal position of Fresnel Lenses.
3. the wireless sound box based on LED visible light communication according to claim 1, is characterized in that, described audio decoder module comprises single-chip microprocessor MCU, D/A converter, low pass filter, audio voltage amplifier.
4. the wireless sound box based on LED visible light communication according to claim 1, is characterized in that, described Fresnel Lenses diameter is 130mm, and focal length is 50mm.
5. the wireless sound box based on LED visible light communication according to claim 1, it is characterized in that, the input of described visible ray receiving system connects the LED visible ray modulator for regulate LED light according to binary digital signal, and the input of LED visible ray modulator connects the audio coder for audio signal being changed into binary digital signal.
6. the wireless sound box based on LED visible light communication according to claim 1, is characterized in that, described audio coder comprises the low-pass filter amplifier, A/D converter, the single-chip microprocessor MCU that connect successively.
7. the wireless sound box based on LED visible light communication according to claim 1, is characterized in that, described LED visible ray modulator comprises that the LED connecting successively drives constant-current source, photoelectrical coupler, MOSFET FET switch circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420099486.4U CN203984609U (en) | 2014-03-06 | 2014-03-06 | Based on the wireless sound box of LED visible light communication |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420099486.4U CN203984609U (en) | 2014-03-06 | 2014-03-06 | Based on the wireless sound box of LED visible light communication |
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| CN203984609U true CN203984609U (en) | 2014-12-03 |
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| CN201420099486.4U Expired - Fee Related CN203984609U (en) | 2014-03-06 | 2014-03-06 | Based on the wireless sound box of LED visible light communication |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105848372A (en) * | 2015-01-12 | 2016-08-10 | 贵州省计量测试院 | Multi-lamp networking drive circuit and method for visible communication |
| CN108897515A (en) * | 2018-05-30 | 2018-11-27 | 苏州树云网络科技有限公司 | A kind of method that Baffle Box of Bluetooth is set off by contrast based on audio parsing progress atmosphere |
| CN110071770A (en) * | 2019-05-16 | 2019-07-30 | 绍兴爱凤环通讯设备有限公司 | Visible light communication receiver |
| CN111726710A (en) * | 2020-06-08 | 2020-09-29 | 无锡路通视信网络股份有限公司 | Intelligent sound post convenient to dismantle installation |
| 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 |
| CN114095089A (en) * | 2021-11-24 | 2022-02-25 | 北部湾大学 | Simple wireless laser voice communication system |
-
2014
- 2014-03-06 CN CN201420099486.4U patent/CN203984609U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105848372A (en) * | 2015-01-12 | 2016-08-10 | 贵州省计量测试院 | Multi-lamp networking drive circuit and method for visible communication |
| CN108897515A (en) * | 2018-05-30 | 2018-11-27 | 苏州树云网络科技有限公司 | A kind of method that Baffle Box of Bluetooth is set off by contrast based on audio parsing progress atmosphere |
| CN110071770A (en) * | 2019-05-16 | 2019-07-30 | 绍兴爱凤环通讯设备有限公司 | Visible light communication receiver |
| CN110071770B (en) * | 2019-05-16 | 2021-12-24 | 绍兴爱凤环通讯设备有限公司 | Visible light communication receiver |
| CN111726710A (en) * | 2020-06-08 | 2020-09-29 | 无锡路通视信网络股份有限公司 | Intelligent sound post convenient to dismantle installation |
| 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 |
| CN114095089A (en) * | 2021-11-24 | 2022-02-25 | 北部湾大学 | Simple wireless laser voice communication system |
| CN114095089B (en) * | 2021-11-24 | 2023-11-07 | 北部湾大学 | Wireless laser sound communication system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141203 Termination date: 20160306 |
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| CF01 | Termination of patent right due to non-payment of annual fee |