CN104485996A - Omnidirectional voice communication transmit-receive system design based on visible light communication and application method - Google Patents
Omnidirectional voice communication transmit-receive system design based on visible light communication and application method Download PDFInfo
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- CN104485996A CN104485996A CN201510002597.8A CN201510002597A CN104485996A CN 104485996 A CN104485996 A CN 104485996A CN 201510002597 A CN201510002597 A CN 201510002597A CN 104485996 A CN104485996 A CN 104485996A
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Abstract
The invention discloses an omnidirectional transmit-receive voice communication device based on visible light communication. The device is suitable for some special communication environments such as underwater communication, under-mine communication and biochemical scene communication, and can carry out 360-degree omnidirectional communication. With the help of the advantage of the visible light communication, the device successfully avoids obstructions met by other communication modes in some special scenes so that the voice communication under these scenes can become faster, and therefore application space of the visible communication is greatly expanded.
Description
Technical field
The present invention relates to design and the application process of a kind of omnidirectional voice communication receive-transmit system, particularly relate to a kind of design and application process of the omnidirectional's voice communication receive-transmit system based on visible light communication, belong to technical field of photo communication.
Background technology
Along with the generally use of LED, visible light communication technology becomes the study hotspot of current optical communication field gradually.The develop rapidly of visible light communication technology urges people to find more scene to apply this technology, comprises the communication under the special screnes such as ore deposit underground communica tion, subsurface communication.
The communication carried out under above-mentioned scene is based on voice communication.Communication under mine, under the scenes such as scene of putting out a fire generally adopts radio communication, and subsurface communication adopts the modes such as acoustic communication, radio communication and gesture to communicate.All there is certain defect and problem in the different communication mode of these different scenes.
Radio communication under mine under the scene such as on-the-spot with fire fighting is very easily subject to electromagnetic interference under special circumstances and causes pickup electrode instability even to produce the interruption communicated, and this caves at mine, fire fighter when going deep into the scene of a fire is least patient situation; Under the scene communicated under water, electromagnetic decay is very big, and communication quality is low, and the transmission rate of acoustic communication is low, cannot carry out the transmission of large data, and gesture is only applicable to the transmission of short-range simple information, and easily misunderstands.
Visible light communication technology is a kind of emerging light wireless communication technology grown up on White light LED technology.Compare with other light wireless communications with traditional radio communication, visible light communication have transmitting power high, without the advantage such as electromagnetic interference, energy savings.This technology is mainly used in indoor communications at present, and due to the strong security of visible light communication, this technology is also applied to short-range confidential communication.
Under application scenes, under the mine mentioned before comprising, fire fighting is on-the-spot, the scene such as under water, visible light communication has larger application space due to strong, the weak feature such as relatively little of its antijamming capability, be particularly useful for the scene of mine disaster rescue, use visible light communication that still can be relieved under the prerequisite that mine gas composition is failed to understand carries out closely voice communication.
But in current research, visible light communication exists the less problem of emission angle, according to some research reports, current main visible light communication system is mainly for communication that is zonal or directivity, basic not towards the communication equipment of omnidirectional.And in above-mentioned special screne, directional communication is absolutely necessary.
Summary of the invention
In view of the existence of above problem, the object of the present invention is to provide a kind of omnidirectional's voice transmitting-receiving system based on visible light communication.
Another object of the present invention is described omnidirectional voice transmitting-receiving system to be applied to above-mentioned application scenarios, and combines, as breathing mask, diving suit etc. with the utensil that personnel in scene wear.
For realizing above-mentioned goal of the invention, the present invention adopts following technical scheme:
Based on omnidirectional's receiving and transmitting voice communication system of reciprocity visible light communication, it is characterized in that:
Described voice communication system comprises transmitting terminal and receiving terminal, and transmitting terminal is made up of high tone quality microphone, the amplification module that transmits, modulation module and high efficiency high-brightness LED lamp group and lamp group driver module; Receiving terminal is made up of photodiode PD group and PD group driver module, filtration module, demodulation module, Received signal strength amplification module, high tone quality earphone.
Wherein, emission process comprises: voice signal is via audio frequency amplifier, and signal obtains the undistorted modulation module that is amplified in the amplifier and modulates, and is loaded into LED lamp and sends with light signal after the bias voltage that is coupled in the drive afterwards;
Receiving course comprises: through spatial, and signal is received by photodiode, is converted to the signal of telecommunication, filtering is carried out by filter module, through by demodulation module demodulation after the interference of filtering other light sources, enter audio frequency amplifier afterwards and amplify, finally play out voice signal by high tone quality earphone.
The sequencing of above-mentioned modem procedue and amplification process can be exchanged, and it depends on the applicable frequency of amplifier.Amplify according to audio frequency amplifier, preferentially carry out amplification process at transmitting terminal, receiving terminal preferentially carries out demodulating process; According to intermediate frequency amplifier then transmitting terminal preferentially carry out modulated process, receiving terminal preferentially carries out amplification process.
Modulation /demodulation in the present invention and filtering, mainly in order to the interference of filtering other light sources, comprise the interference etc. of illumination light, natural daylight, invisible light.The interference of other light sources, its frequency mainly concentrates on 0 ~ 12kHz, and the signal of telecommunication of transmission is modulated to higher than this section of spectral range by modulator approach by the present invention, carries out filtering afterwards by above-mentioned filter module to the frequency range of 0 ~ 12kHz, after filtering interfering, receiving terminal carries out demodulation and obtains original signal.
By the above-mentioned method combined with described special screne worn appliance based on omnidirectional's receiving and transmitting voice communication system of reciprocity visible light communication, it is characterized in that:
(1) transceiver communication equipment (LED lamp, PD group) is integrated into and wears on utensil;
(2) voice transmitting-receiving integration of equipments is in closed breathing apparatus (the breathing filter tip as diving suit);
(3) signal processing module is integrated into one piece of PCB circuit board, and is connected with transceiver communication equipment, voice transmitting-receiving equipment by high-quality transmission line, is positioned over and is positioned at seal box, have portability, can be positioned over loins;
(4) power supply is supplied by storage battery, and storage battery is attached in the seal box of above-mentioned other processing modules of encapsulation.
When determining interval angles and the quantity of LED lamp and PD in above-mentioned transceiver communication equipment, need to consider adopted LED lamp and the relevant parameter of PD, comprise the angle of departure and the angle of visual field, demand fulfillment be that the angular range that each wick and PD are responsible for irradiating and receive is less than self the angle of departure or the angle of visual field, in the process of transmitting and receiving, realize omnidirectional like this cover.The selection of therefore concrete quantity needs to draw, finally by quantity determination interval angles according to wick and the angle of departure of PD or the experiments of measuring of acceptance angle.
Wherein, LED group and PD group are integrated in the method worn on utensil to be had a variety of, design time demand fulfillment LED or PD between interval angles be less than its own transmission angle and the angle of visual field; Transmitting and receiving are not worn utensil and are blocked; By good data cube computation access signal processing module; The problems such as circuit design and encapsulation well can not be short-circuited cause several conditions such as not working.
The main application scenarios of the present invention comprises: subsurface communication, ore deposit underground communica tion, biochemical scene communication, fire fighting on-scene communication etc.
Under the scene communicated under water, the present invention is mainly used in rescuing under water, salvages, surveys Divers short distance omnidirectional voice communication each other.In this scenario, this is invented mainly through above-mentioned Integration ofTechnology on the helmet and breathing mask of diver, simultaneously, for prevent diver under water operation time because of the propagation of light that caused health to block of personal floatation angle problem, transceiver communication system is installed too additional at the step of diver, and then regardless of the posture of diver in water, other divers at least one device all by being positioned at head or foot receives light signal.All receive-transmit systems are connected to signal processing module finally by waterproof pressure quality data line, and signal processing module is packaged in the anti-interference encapsulation box of water-tight in this scene, is attached to by diver's oxygen cylinder together with storage battery.
Under the scene of mine communication, the present invention be mainly used in mine disaster occur after rescue work and explore new mining area, underground time to when in mining area, composition of air is failed to understand use.In mine disaster generation or when exploring new mining area, underground, in mining area, in air, composition is failed to understand, needs to dress togs, can not directly talk, simultaneously because rock composition in mine is failed to understand, may have an impact to conventional radio wave communication, the present invention will very applicable this kind of scene.In above-mentioned scene, as described in said method, the above-mentioned transceiver communication system integration is on miners' cap, and the above-mentioned voice transmitting-receiving system integration is on respirator, and above-mentioned signal processing module is attached in related personnel's kit.
Under biochemical scene, the present invention is mainly used in using in the biochemical test of precision instrument, conventional radio ripple can cause electromagnetic interference for some precision instrument, and the carrying out of impact experiment, replaces to visible light communication by conventional radio ripple and avoid the problems referred to above under this kind of scene.In this scene, transceiver of the present invention is integrated on the breathing mask of experimenter, and signal processing module is fixed on waist after encapsulation.
Omnidirectional's voice communication receive-transmit system based on visible light communication provided by the present invention is by making it can be applicable to application scenes and can carry out 360 ° of directional communication with the combination of relevant device, adding modulation, filter circuit in a processing circuit for offsetting the interference from bias light and other noises simultaneously, making visible light communication become the very reliable communication technology in application scenes.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further illustrated.
Fig. 1 is the transfer process figure of the omnidirectional's voice transmitting-receiving system based on visible light communication.
Fig. 2 is the physical device application drawing of the omnidirectional's voice transmitting-receiving system based on visible light communication.
Embodiment
The omnidirectional's voice transmitting-receiving system material object based on visible light communication of ore deposit underground communica tion is applicable to as shown in Figure 2 in the present invention.Its chief component comprises: transmitting terminal is made up of high tone quality microphone, the amplification module that transmits, modulation module and high efficiency high-brightness LED lamp group and lamp group driver module; Receiving terminal is made up of photodiode PD group and PD group driver module, filtration module, demodulation module, Received signal strength amplification module, high tone quality earphone.
Wherein form transceiver communication equipment by LED lamp and photodiode; Microphone becomes voice transceiver with headphone set; All the other module composition signal processing modules.
Transceiver communication system is assemblied in be worn on utensil, in fig. 2 for being assemblied on safety cap, wherein LED lamp is assemblied in the position of miners' cap close to bottom, mount around head, the interval angles of wick is less than the angle of departure of wick, the mutual overlapping increase irradiation brightness of adjacent wick irradiation area, connected by holding wire connection in series-parallel between wick, and be connected to signal processing module by quality data transmission line, all wicks launch identical signal (except this kind of method, also multiple LED lamp can be combined into a small-sized theaomni-directional transmission lamp and by insulating hollow pipe with wear utensil and be connected, general tie point is positioned at tool tip, hollow tube vertically upward, multiple wick connects with series-parallel system, holding wire is extended to by hollow tube to be worn in utensil, access signal processing module afterwards).PD is assemblied in and specially wears tool tip, in fig. 2 for being assemblied in miners' cap top, PD group is integrated on pcb board, photosurface outwards and assemble perpendicular to miners' cap top, each PD is responsible for receiving the light signal within the scope of the certain receiving angle of horizontal direction, this angle is the specified angle of visual field of PD, the overlapped increase reception of range of receiving of PD, the mutual connection in series-parallel of PD group, receive the light signal from different directions and superpose after being converted to the signal of telecommunication, be connected to signal processing module finally by quality data transmission line (in addition also multiple PD to be integrated on pcb board equally, be placed on the insulating hollow pipe top accompanying by above-mentioned LED lamp, under LED lamp group is positioned at it, holding wire is extended by hollow tube and accesses signal processing module).
Voice transmitting-receiving system is assemblied on closed breathing mask, in fig. 2 for being assemblied on fire-fighting breathing mask, above-mentioned microphone is assemblied in by the respirator of mouth, and earphone is assemblied in the position that ears pressed close to by breathing mask, and is connected with signal processing module by high-quality transmission line.
Signal processing module is responsible for all audio processing process.At transmitting terminal, voice signal is produced by microphone, by high-quality transmission line access signal processing module.First signal enters above-mentioned audio frequency amplifier, and amplifier amplifies signal, makes amplitude reach transmission standard.(to amplify as described above and the process of modulation /demodulation is suitable for frequency depending on the amplifier of employing, adopt audio frequency to amplify event transmitting terminal in this example preferentially to amplify, receiving terminal preferentially carries out demodulation) amplify after voice signal enter above-mentioned modulation module, in this module, signal is modulated, most of modulator approach all may be used in native system, need to determine according to practical situations, signal frequency range moves the interference that more than 20kHz avoids other light sources the most at last, and bandwidth need be greater than 1.5kHz.Signal loading is to above-mentioned wick drive plate, and drive plate drives wick to produce bright dark change, and then signal transmission.
At receiving terminal, light signal is received by above-mentioned PD, convert the signal of telecommunication to, enter above-mentioned filter module, by the interference signal of filter below filtering 15kHz, this interference signal comprises the interference signal that fluorescent lamp interference signal, Infrared jamming signal etc. can receive at sound frequency, enter above-mentioned demodulator by the signal after filter process and carry out demodulation, amplify by above-mentioned audio frequency amplifier afterwards, obtain the voice signal after reducing, finally release via earphone.
Above to invention has been detailed description, but obvious specific implementation form of the present invention is not limited thereto.For the those skilled in the art of the art, the various apparent change carried out it when not deviating from spirit and the right of the method for the invention is all within protection scope of the present invention.
Claims (6)
1., based on omnidirectional's voice communication receive-transmit system of visible light communication, it is characterized in that:
Described voice communication system comprises transmitting terminal and receiving terminal, and transmitting terminal is made up of high tone quality microphone, the amplification module that transmits, modulation module and high efficiency high-brightness LED lamp group and lamp group driver module; Receiving terminal is made up of photodiode PD group and PD group driver module, filtration module, demodulation module, Received signal strength amplification module, high tone quality earphone.
2., as claimed in claim 1 based on omnidirectional's voice communication receive-transmit system of visible light communication, it is characterized in that:
Wherein, emission process comprises: voice signal is via audio frequency amplifier, and signal obtains the undistorted modulation module that is amplified in the amplifier and modulates, and is loaded into LED lamp and sends with light signal after the bias voltage that is coupled in the drive afterwards.
3., as claimed in claim 1 based on omnidirectional's voice communication receive-transmit system of visible light communication, it is characterized in that:
Receiving course comprises: through spatial, and signal is received by photodiode, is converted to the signal of telecommunication, filtering is carried out by filter module, through by demodulation module demodulation after the interference of filtering other light sources, enter audio frequency amplifier afterwards and amplify, finally play out voice signal by high tone quality earphone.
4., as claimed in claim 1 based on omnidirectional's voice communication receive-transmit system of visible light communication, it is characterized in that:
The sequencing of above-mentioned modem procedue and amplification process can be exchanged, and it depends on the applicable frequency of amplifier.Amplify according to audio frequency amplifier, preferentially carry out amplification process at transmitting terminal, receiving terminal preferentially carries out demodulating process; According to intermediate frequency amplifier then transmitting terminal preferentially carry out modulated process, receiving terminal preferentially carries out amplification process.
5., as claimed in claim 3 based on omnidirectional's voice communication receive-transmit system of visible light communication, it is characterized in that:
Modulation /demodulation in the present invention and filtering, mainly in order to the interference of filtering other light sources, comprise the interference etc. of illumination light, natural daylight, invisible light.The interference of other light sources, its frequency mainly concentrates on 0 ~ 15kHz, and the signal of telecommunication of transmission is modulated to higher than this section of spectral range by modulator approach by the present invention, carries out filtering afterwards by above-mentioned filter module to the frequency range of 0 ~ 15kHz, after filtering interfering, receiving terminal carries out demodulation and obtains original signal.
6., by the above-mentioned method combined with described special screne worn appliance based on omnidirectional's receiving and transmitting voice communication system of reciprocity visible light communication, it is characterized in that:
(1) transceiver communication equipment (LED lamp, PD group) is integrated into and wears on utensil, when determining interval angles and the quantity of LED and PD, demand fulfillment interval angles is less than self the angle of departure or the angle of visual field, and omnidirectional when realizing transmitting and receiving covers;
(2) voice transmitting-receiving integration of equipments is in closed breathing apparatus, and integrated need meet the principle of sealing and normal talking;
(3) signal processing module is integrated into one piece of circuit board, and is connected with transceiver communication equipment, voice transmitting-receiving equipment by high-quality transmission line, is positioned over and is positioned at seal box, have portability, can be positioned over loins;
(4) power supply is supplied by storage battery, and storage battery is attached in the seal box of above-mentioned other processing modules of encapsulation.
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| 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 |
| CN108768523A (en) * | 2018-05-30 | 2018-11-06 | 大连理工大学 | A kind of underwater general optical communication system |
| CN109936408A (en) * | 2019-01-12 | 2019-06-25 | 上海贵霖通信技术有限公司 | A kind of underwater communication apparatus and its application method using visible light |
| US20210122447A1 (en) * | 2018-03-26 | 2021-04-29 | Ellipz Smart Solutions Europe | Diving mask comprising a li-fi communication module |
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Application publication date: 20150401 |