Asynchronous digital information transmitting device based on analog broadcast channel

Abstract

The invention discloses an asynchronous digital information transmitting device based on an analog broadcast channel. The asynchronous digital information transmitting device based on the analog broadcast channel comprises an upper computer, a microprocessor and an HART modulator, wherein the upper computer is used for editing data information to be transmitted; the microprocessor is in communication connection with the upper computer to carry out coding and framing processing on the received information; and the HART modulator is in communication connection with the microprocessor to modulate the received information into FSK signals. By the asynchronous digital information transmitting device based on the analog broadcast channel, to-be-transmitted information transmitted from the upper computer can be received in a serial mode through a core processor, digital signals are modulated on the basis of a HART modem, the modulating signals are directly sent into a frequency modulation transmitter through an audio interface, and are modulated at high frequency and transmitted, and a function of transmitting the digital information by an existing analog broadcast channel is fulfilled. The asynchronous digital information transmitting device based on the analog broadcast channel has the effects of good implementable effect and high operability.

Description

technical field [0001] The invention relates to a data transmission system used in the case of network information communication. More specifically, the present invention relates to an asynchronous digital information transmission device based on an analog broadcast channel used in the case of broadcast network communication. Background technique [0002] Network communication is to connect various isolated devices through the network, and realize communication between people, people and computers, and computers and computers through information exchange. The existing communication methods mainly include: telecommunication network, broadcast communication and Internet. [0003] In the field of network information technology, the traditional Internet service model plays a mainstream role in the current network communication, but there are many bottlenecks, such as: [0004] 1. Most Internet users exclusively use the bandwidth and resources of network services. As the number...

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Problems solved by technology

[0004] 1. Most Internet users exclusively use the bandwidth and resources of network services. As the number of users increases, service congestion will occur due to network resource sharing conflicts;

[0005] 2. Internet services mainly rely on its network infrastructure, and remote areas lacking network infrastructure lack fast and effective information release methods;

[0006] 3. Disasters and infrastructure damage during wars will lead to communication failures for large-scale ordinary users, lack of digital information transmission and release methods, and inability to receive digital information in a timely manner

[0007] The telecommunications network has a wide distribution of network infrastructure because of the large number of users, but it also has problems in Internet communication, such as the inability to provide digital information transmission and release methods in emergencies, and cannot realize data communication in a timely manner.

[0008] Although the current wireless broadcasting network has a wide coverage and does not depend on the basic network facilities of the Internet in many areas, as a one-way network, it cannot exchange information with users

At the same time, the usual way of transmitting information on the broadcasting network itself can only be sound signals, and cannot transmit text and pictures in the form of digital information to provide services for users, resulting in a lack of service resources and difficulty in attracting users. The reason is that the existing broadcasting Information sending equipment in the network, which can only send audio analog signals, does not have the ability to send analog pictures and text signals

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