Information exchange system based on audio frequency and exchange method thereof
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An information exchange and audio signal technology, applied in the field of information processing, can solve the problems of inability to receive high-frequency ultrasonic signals, lack of security, unsuitable application and popularization, etc. Safe and reliable anti-counterfeiting effect
Inactive Publication Date: 2014-01-01
上海君戈网络科技有限公司
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The disadvantage of this invention is that the mobile terminal can only demodulate the data preset in the ultrasonic generator, and cannot obtain the latest service information and points and other data in real time, and according to market research, only a part of mobile phone microphones can receive Most of the ultrasonic signals cannot receive high-frequency ultrasonic signals. Therefore, the use of ultrasonic signals for positioning also has hardware thresholds, which is not suitable for commercial applications.
[0005] To sum up, the existing positioning technology has the problems of high equipment cost, unchanged layout, unfavorable popularization and lack of security, so everyone is looking for new technical solutions
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Embodiment 1
[0028] Embodiment 1: as figure 1 As shown, this embodiment relates to information processing technology, and specifically relates to an audio-based information exchange system and an exchange method thereof. The information exchange system is mainly composed of a mobile terminal 1 , an audio transmitter 2 and a server 3 . Each audio transmitting device 2 is assigned a different equipment code and location identification code, and there is a specific encryption operation relationship between these two codes. When the audio transmitting device 2 sends out an audio signal with preset information, the existing microphone 4 on the mobile terminal 1 receives the audio signal, and completes the decoding of the audio signal through a demodulation module, thereby knowing that the audio transmitting device 2 Afterwards, the mobile terminal 2 sends the location code to the server 3 through the wireless network or the mobile communication network, and the server 3 that obtains the locati...
Embodiment 2
[0042] Embodiment 2: as Figure 4 Shown is the working principle diagram of the preferred audio amplifier of the present invention, through digital switching devices, such as circuits such as 4069 to realize a differential drive, its specific working principle is as follows:
[0043] ① The data modulation signal to be amplified is input from pin 13 of U1F;
[0044] ② A reverse analog amplification of about 10 times is completed through U1F and transmitted to pin 11 of U1E;
[0045] ③U1E works in the switch state, realizing a signal reverse action;
[0046] ④U1A and U1B complete the in-phase amplification of the signal;
[0047] ⑤ U1C and U1D complete the inverse amplification of the signal;
[0048] ⑥LS1 is a piezoelectric ceramic speaker driven by a digital differential circuit composed of U1A, U1B, U1C, and U1D;
[0049] ⑦ R111 and R112 are set to improve the high-level driving ability.
[0050] In this embodiment, in a larger area, multiple audio transmitters need to b...
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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 [0001] The invention relates to information processing technology, in particular to an indoor small-scale and high-precision audio-based information exchange system and an exchange method thereof. Background technique [0002] With the development of information and communication technology and the popularization of smart phones, the positioning technology of mobile terminals is also showing a trend of diversification, which brings unlimited business opportunities to the development and expansion of location services. The so-called location service (LBS, Location Based Services), also known as location service, refers to the cooperation between the mobile terminal and the mobile network to determine the actual geographical location of the mobile user, thereby providing the location-related service information and point rewards required by the user. a form. [0003] At present, the positioning technology of mobile terminals mainly includes: positioning based ...
Claims
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Application Information
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