CN103490826A - Information exchange system based on audio frequency and exchange method thereof - Google Patents
Information exchange system based on audio frequency and exchange method thereof Download PDFInfo
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- CN103490826A CN103490826A CN201210192694.4A CN201210192694A CN103490826A CN 103490826 A CN103490826 A CN 103490826A CN 201210192694 A CN201210192694 A CN 201210192694A CN 103490826 A CN103490826 A CN 103490826A
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Abstract
The invention relates to the information processing technology, in particular to an information exchange system based on audio frequency and an exchange method thereof, wherein the information exchange system has high precision and is used within a small range indoors. According to the specific scheme, the information exchange system is formed by an audio frequency emission device, a mobile terminal and a server; the audio frequency emission device is arranged at a specific position and used for sending audio frequency signals which are modulated in advance and contain equipment codes and position identification codes; the mobile terminal is provided with a microphone and used for receiving the audio frequency and decoding the audio frequency into equipment codes and position codes, the equipment codes and the position codes are sent to the server through a mobile network, and the server obtaining the codes immediately pushes position service information to the mobile terminal. The information exchange system has the advantages that the information exchange system is high in safety, reliability and anti-counterfeit performance, a user at the mobile terminal can position and obtain peripheral service information at any time, the requirement of the mobile terminal for hardware configuration is low, all mobile terminals can receive the audio frequency signals, and the audio frequency emission device is low in construction cost and suitable for popularization on a large scale.
Description
Technical field
The present invention relates to the information processing technology, be specifically related to a kind of indoor high-precision Information Exchange System and switching method thereof based on audio frequency among a small circle.
Background technology
Along with the development of ICT (information and communication technology) and popularizing of smart mobile phone, the location technology of mobile terminal also is pluralistic trend, and this gives carrying out of location-based service and expansion has brought infinite commercial opportunities.So-called location-based service (LBS, Location Based Services) weighed position service again, refer to by mobile terminal and mobile network's cooperation, determine mobile subscriber's actual geographic position, thereby the needed information on services relevant to position of user and a kind of form of reward on total mark are provided.
At present, the location technology of mobile terminal mainly comprises: based on modes such as GPS, NFC (close range wireless communication), RFID (REID), WIFI focus, bluetooth or mobile phone two-dimension codes, reach location, yet all there is certain weak point in above-mentioned location technology in business is used, and wherein GPS can't realize at indoor hi-Fix; All there is necessary hardware foundation support in the location of NFC and RFID, and the schemes such as transformation of the way mobile phone increase chip obviously are unfavorable for universality and the convenience of business application; WIFI focus location technology is faced with the shortcomings such as the focus construction cost is higher, the hardware supports rate is lower, and there be this kind of problem equally in described bluetooth location technology; And the mobile phone two-dimension code location is to obtain geography information by the recognition of the camera on mobile terminal Quick Response Code, so there is high requirement for the shooting pixel of mobile phone, do not there is equally universal applicability.
According to the disclosed a kind of mobile terminal ultrasonic communication system and method for number of patent application " 201110287685.9 ", this system mainly comprises supersonic generator and mobile terminal, this mobile terminal receives ultrasonic wave and therefrom demodulates preset geographic information data, thereby reaches the purpose of location.The weak point of this invention is that mobile terminal can only demodulate the data that are preset in advance in supersonic generator, the data such as can't Real-time Obtaining up-to-date information on services and integration, and according to market survey, only have at present the microphone of part of cell phone can receive ultrasonic signal, major part can't receive high-frequency ultrasonic signal, therefore adopt the ultrasonic signal location to have equally the hardware threshold, and be not suitable for business-like application popularization.
In sum, existing location technology exist equipment cost high, arrange constant, be unfavorable for problem universal and the fail safe shortcoming, so everybody is seeking new technical solution.
Summary of the invention
The objective of the invention is according to above-mentioned the deficiencies in the prior art part, a kind of Information Exchange System and switching method thereof based on audio frequency is provided, the audio signal that presets device coding and position code that this Information Exchange System is outwards launched by the existing microphone audio reception emitter on mobile terminal, and be decoded into device coding and position encodedly to server, send to carry out the geographical position checking by the demodulation module in mobile terminal, push the information on services relevant to this geographical position by server to mobile terminal simultaneously, to reach the location-based service based on the audio frequency location.
The object of the invention realizes being completed by following technical scheme:
A kind of Information Exchange System and switching method thereof based on audio frequency, is characterized in that described Information Exchange System mainly comprises audio emitting device, mobile terminal and server;
Described audio emitting device is comprised of processor, audio frequency amplifier and audio frequency transmitter unit, described each audio emitting device is equipped with different device codings and position code, and described processor inside is provided with the setting of encrypting module for encrypt relation between device coding and position code;
Described mobile terminal is built-in with the demodulation module of audio signal; Wherein said demodulation module is provided with audio signal sample mouth and data output, and described audio signal sample mouth is connected with the existing microphone of described mobile terminal, and described data output is connected with the existing wireless network module of described mobile terminal;
Described server is connected through wireless network with described existing wireless network module.
Be provided with the decipher function piece in described demodulation module, for encrypt relation between Authentication devices coding and position code.
Be provided with an external communication interface on described processor.
Be provided with the mos pipe between described audio frequency amplifier and audio frequency transmitter unit, for amplifying described audio signal.
Described processor inside is provided with memory, and this memory inside stores described device coding and position code, and by being arranged on I/O mouth or the D/A conversion mouthful audio signal that output modulates on processor.
Described audio frequency transmitter unit is an electroacoustic transducer.
Be provided with memory in described server, in this memory, store information packet, for and described mobile terminal between information exchange.
Be provided with counting module in described server, for adding up the mobile terminal quantity of audio reception emitter signal.
Described mobile terminal can be mobile phone, panel computer or notebook computer.
The larger zone at area, need to place a plurality of audio emitting devices, device coding and the position code of each audio emitting device are different, when user's mobile terminal is in effective coverage, mobile terminal receives the audio-frequency information after modulation by microphone, and processes the best audio-frequency information of signal strength signal intensity wherein and therefrom demodulate coded message by software.
Advantage of the present invention is, the safe and reliable antifalsification of Information Exchange System is high, ambient services information can be located and obtain to mobile phone users at any time, hardware configuration for mobile terminal requires low, but all mobile terminals are received audio signal all, the audio emitting device construction cost is low, and suitable large-scale promotion is universal.
The accompanying drawing explanation
Fig. 1 is Information Exchange System schematic diagram of the present invention;
Fig. 2 is audio frequency amplifier fundamental diagram of the present invention;
Fig. 3 is audio frequency emission flow chart of the present invention;
Fig. 4 is preferred audio frequency amplifier fundamental diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, by embodiment, feature of the present invention and other correlated characteristic are described in further detail, so that technical staff's of the same trade understanding:
As Fig. 1-4, in figure, mark 1-4 is respectively: mobile terminal 1, audio emitting device 2, server 3, microphone 4.
Embodiment 1: as shown in Figure 1, the present embodiment relates to the information processing technology, is specifically related to a kind of Information Exchange System and switching method thereof based on audio frequency.This Information Exchange System mainly is comprised of mobile terminal 1, audio emitting device 2 and server 3.Each audio emitting device 2 all is assigned different device codings and position code, between these two codings, has specific cryptographic calculation relation.When audio emitting device 2 outwards sends the audio signal of the information of presetting, existing microphone 4 on mobile terminal 1 receives this audio signal, and complete the decoding of audio signal by a demodulation module, thereby learn the position encoded of audio emitting device 2, thereafter mobile terminal 2 sends position encoded by wireless network or mobile communications network to server 3, obtain position encoded server 3 and immediately to mobile terminal 1, push the information on services of positional information and this position periphery, and add up flow of the people every day of each trade company by the counting module in server 3.
The specific works process of audio emitting device 2 is as follows: at first described processor is realized digital signal (being described device coding and position code) is modulated on the audio signal of a 15.8KHz by internal arithmetic, and the signal that this is modulated is by self I/O mouth or D/A conversion mouthful output; Thereafter the described signal modulated amplifies by audio frequency amplifier and exports, in order to promote the outside audio signals of described audio frequency transmitter unit.Wherein said audio frequency amplifier amplifies the audio signal after modulation and finally by mos, manages and realize recommending output.Described audio frequency transmitter unit is an electroacoustic transducer, can be the electro-acoustic conversion devices such as electromagnetic loudspeaker, piezo buzzer, piezo-electric loudspeaker, electrostatic loudspeaker.
As shown in Figure 2, the specific works principle of described audio frequency amplifier is: the described 15.8khz CF signal that needs emission through 1u electric capacity every the in-phase input end that directly is coupled to TDA2030,22k resistance and 680 resistance have determined that the multiplication factor of this circuit is 33.4 times, audio signal after amplification, from the 4 pin outputs of TDA2030, sends thereby promote loud speaker.Wherein, VCC=+15V, VSS=-15V, the effect that is connected to the electric capacity of 0.1u on VCC and VSS and 100u is power filter and moves back lotus root.The effect of two 4001 diodes is to realize output violent change.1 Ohmic resistance in parallel with loud speaker and 0.1u electric capacity are typical self-maintained circuits of eliminating.
As shown in Figure 3, software flow pattern for the emission of the present embodiment audio frequency, after single-chip microcomputer electrification reset in audio emitting device 2, at first carry out initialization, then export the device coding of 8 bytes by the PWM mouth, then and then export the position encoded of 8 bytes, finally wait for that 300ms starts transmitting apparatus coding and position encoded circulation again after the time.
At first described demodulation module collects audio signal by microphone existing on mobile terminal 14, and by deciphering module use special operation method by audio signal decoding to obtain device coding and position encoded, and checking apparatus coding and position encoded checking relation, carry out the DES deciphering, if device coding and position encodedly there is correct DES operation relation, this software sends these two codings by the interior existing wireless network module of mobile terminal 1 to long-range server 3, when obtaining after position encoded accurately, server 3 is complementary with storage information packet in the inner, call and these position encoded relevant data, and to the instant information on services that pushes positional information and this position periphery of mobile terminal 1.Be below the concrete reception flow process of mobile terminal:
1. memory is accepted in initialization, distributes the memory space of 16 bytes, and all sets to 0;
2. start received ultrasonic signal;
3. open timer, receive the voice data of 400ms;
4. analyze the data that receive, take and be greater than 100ms as basis for estimation, find the starting point of decoding.Found just as the decoding that starts to carry out 16 bytes;
5. the data of front 8 bytes of decoded data are carried out the DES computing with the key that is stored in equipment, if the data that obtain are with decode position encoded consistent complete reception process one time;
6. otherwise jump to 2 and restart.
The present embodiment has been realized indoor location among a small circle preferably by audio emitting device 2 and server 3.
Embodiment 2: be illustrated in figure 4 preferred audio frequency amplifier fundamental diagram of the present invention, by the digital switch device, such as 4069 circuit such as grade, realize a differential driving, its specific works principle is as follows:
1. need the data modulated signal of amplifying to input from 13 pin of U1F;
2. completed once through U1F 11 pin that the about inverse analog of 10 times amplifies and be sent to U1E;
3. U1E is operated under on off state, has realized a signals reverse effect;
4. U1A and U1B have completed the homophase amplification of signal;
5. U1C and U1D have completed the anti-phase amplification of signal;
6. LS1 is a piezoelectric ceramic loudspeaker, by the digital differential drives of U1A, U1B and U1C, U1D formation;
7. R111 and R112 promote ability and arrange in order to improve high level.
In the present embodiment, the larger zone at area, need to place a plurality of audio emitting devices, device coding and the position code of each audio emitting device are different, when user's mobile terminal is in effective coverage, mobile terminal receives the audio-frequency information after modulation by microphone, has comprised the different coding information of each adjacent audio emitting device in these audio-frequency informations, but, because emission source is different to the distance of mobile terminal, there is difference in signal strength signal intensity.
The built-in audio frequency demodulation module of mobile terminal has been taked the mode of adaptive-filtering, and by distance, the signal that modulation amplitude is little is used as the interference signal filtering, thereby ensures the mobile terminal data that correctly the nearest audio emitting device of demodulation sends.When the user is between two mobile terminals just, mobile terminal can not be correctly decoded, but this can cause device coding and position code can not pass through validation verification; Once the user has left such specific region, communication can normally be carried out.
Claims (10)
1. Information Exchange System and the switching method thereof based on audio frequency, is characterized in that described Information Exchange System mainly comprises audio emitting device, mobile terminal and server;
Described audio emitting device is comprised of processor, audio frequency amplifier and audio frequency transmitter unit, described each audio emitting device is equipped with different device codings and position code, and described processor inside is provided with the setting of encrypting module for encrypt relation between device coding and position code;
Described mobile terminal is built-in with the demodulation module of audio signal; Wherein said demodulation module is provided with audio signal sample mouth and data output, and described audio signal sample mouth is connected with the existing microphone of described mobile terminal, and described data output is connected with the existing wireless network module of described mobile terminal;
Described server is connected through wireless network with described existing wireless network module.
2. a kind of Information Exchange System based on audio frequency according to claim 1, is characterized in that in described demodulation module being provided with the decipher function piece, for encrypt relation between Authentication devices coding and position code.
3. a kind of Information Exchange System based on audio frequency according to claim 1, is characterized in that on described processor being provided with an external communication interface.
4. a kind of Information Exchange System based on audio frequency according to claim 1, is characterized in that being provided with drive circuit between described audio frequency amplifier and audio frequency transmitter unit, for amplifying described audio signal.
5. a kind of Information Exchange System based on audio frequency according to claim 1, it is characterized in that described processor inside is provided with memory, this memory inside stores described device coding and position code, and by being arranged on I/O mouth or the D/A conversion mouthful audio signal that output modulates on processor.
6. a kind of Information Exchange System based on audio frequency according to claim 1, is characterized in that described audio frequency transmitter unit is an electroacoustic transducer.
7. a kind of Information Exchange System based on audio frequency according to claim 1, is characterized in that being provided with memory in described server, in this memory, stores information packet, for and described mobile terminal between information exchange.
8. a kind of Information Exchange System based on audio frequency according to claim 1, is characterized in that being provided with counting module in described server, for adding up the mobile terminal quantity of audio reception emitter signal.
9. a kind of Information Exchange System based on audio frequency according to claim 1, is characterized in that described mobile terminal can be mobile phone, panel computer or notebook computer.
10. a kind of Information Exchange System and switching method thereof based on audio frequency according to claim 1, it is characterized in that: the larger zone at area, need to place a plurality of audio emitting devices, device coding and the position code of each audio emitting device are different, when user's mobile terminal is in effective coverage, mobile terminal receives the audio-frequency information after modulation by microphone, and processes the best audio-frequency information of signal strength signal intensity wherein and therefrom demodulate coded message by software.
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| CN201210192694.4A CN103490826A (en) | 2012-06-12 | 2012-06-12 | Information exchange system based on audio frequency and exchange method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103973806A (en) * | 2014-05-20 | 2014-08-06 | 华侨大学 | Indoor positioning method |
| CN104093215A (en) * | 2014-05-06 | 2014-10-08 | 腾讯科技（深圳）有限公司 | Connection method, system and device for mobile device |
| CN104103269A (en) * | 2014-06-30 | 2014-10-15 | 上海科泰信息技术有限公司 | Audio identification electronic tag |
| CN104134297A (en) * | 2014-07-16 | 2014-11-05 | 福建联迪商用设备有限公司 | Electronic equipment, POS machine positioning method, POS machine positioning system and positioning equipment |
| CN104683947A (en) * | 2014-12-19 | 2015-06-03 | 上海虎符通信科技股份有限公司 | Acoustic wave-based indoor positioning method and business information pushing method |
| WO2015135301A1 (en) * | 2014-03-14 | 2015-09-17 | 北京超感时空科技有限公司 | Network terminal and configuration method thereof |
| CN105704229A (en) * | 2016-03-16 | 2016-06-22 | 王斌 | Online position point linkage method based on omni-channel offline entity terminal |
| CN106797257A (en) * | 2014-08-26 | 2017-05-31 | 雅马哈株式会社 | Audio processing equipment and the method that information is provided |
| US9681297B2 (en) | 2014-08-18 | 2017-06-13 | Alibaba Group Holding Limited | Information exchange method and apparatus |
| CN110636133A (en) * | 2019-09-25 | 2019-12-31 | 上海动听网络科技有限公司 | Method, device, terminal, server and system for assisting accurate positioning |
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2012
- 2012-06-12 CN CN201210192694.4A patent/CN103490826A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015135301A1 (en) * | 2014-03-14 | 2015-09-17 | 北京超感时空科技有限公司 | Network terminal and configuration method thereof |
| CN104093215A (en) * | 2014-05-06 | 2014-10-08 | 腾讯科技（深圳）有限公司 | Connection method, system and device for mobile device |
| CN104093215B (en) * | 2014-05-06 | 2016-04-13 | 腾讯科技（深圳）有限公司 | A kind of method of attachment of mobile device, system and device |
| CN103973806A (en) * | 2014-05-20 | 2014-08-06 | 华侨大学 | Indoor positioning method |
| CN103973806B (en) * | 2014-05-20 | 2017-07-21 | 华侨大学 | A kind of indoor positioning device and indoor orientation method |
| CN104103269A (en) * | 2014-06-30 | 2014-10-15 | 上海科泰信息技术有限公司 | Audio identification electronic tag |
| CN104134297A (en) * | 2014-07-16 | 2014-11-05 | 福建联迪商用设备有限公司 | Electronic equipment, POS machine positioning method, POS machine positioning system and positioning equipment |
| US9681297B2 (en) | 2014-08-18 | 2017-06-13 | Alibaba Group Holding Limited | Information exchange method and apparatus |
| CN106797257A (en) * | 2014-08-26 | 2017-05-31 | 雅马哈株式会社 | Audio processing equipment and the method that information is provided |
| CN104683947A (en) * | 2014-12-19 | 2015-06-03 | 上海虎符通信科技股份有限公司 | Acoustic wave-based indoor positioning method and business information pushing method |
| CN105704229A (en) * | 2016-03-16 | 2016-06-22 | 王斌 | Online position point linkage method based on omni-channel offline entity terminal |
| CN110636133A (en) * | 2019-09-25 | 2019-12-31 | 上海动听网络科技有限公司 | Method, device, terminal, server and system for assisting accurate positioning |
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