A bus type fire communication system

A communication system, bus-type technology, applied in the direction of bus network, telephone communication, data exchange through path configuration, etc., can solve the problems of cumbersome wiring operations, unusable, affecting call quality, etc., achieve good anti-interference ability, reduce connection Bugs, effects that improve call quality

Active Publication Date: 2018-07-24
深圳市高新投三江电子股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fire communication system with multi-line connection method is not suitable for use in the on-site construction environment due to the large number of connections, complexity, and high cost. Therefore, two-line fire communication systems are usually used in engineering construction today.
[0003] But, the inventor finds in research and practice to prior art, there is following deficiency in the two-wire type fire-fighting communication system on the market now: (1) the audio signal transmitted on the bus of the two-wire type fire-fighting communication system is obtained by superposition The non-differential signal is easily affected by the environment and affects the call quality
(2) The bus of the two-wire fire protection communication system needs to distinguish the polarity when connecting, and the wiring operation is more cumbersome, which brings inconvenience to the actual construction
(3) The maximum length of the bus of the two-line fire communication system can only reach 1000 meters. If the construction site needs to communicate at a longer distance, it cannot be used

Method used

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  • A bus type fire communication system
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Examples

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Effect test

Embodiment 1

[0019] Please refer to figure 1 In the embodiment of the present application, a bus-type fire fighting communication system is provided, which includes: a fire telephone switchboard 1, at least one fire telephone extension 2 and / or a telephone jack module 3, the telephone jack module 3 is connected with a common telephone 4 .

[0020] The fire telephone switchboard 1 is provided with a switchboard transformer coupling unit 50, the fire telephone extension 2 and the telephone jack module 3 are respectively provided with a terminal transformer coupling unit 51, the fire telephone switchboard 1 and at least one fire telephone extension 2 and / or telephone jack The module 3 is connected by two buses 6. The audio signal output by the fire telephone switchboard 1 is converted into an audio differential signal by the switchboard transformer coupling unit 50, and superimposed on the two buses 6 for transmission. The audio signal output by the fire telephone extension 2 and / or the telephon...

Embodiment 2

[0032] Such as Figure 4 As shown, this application also provides a bus-type firefighting communication system, which is basically the same as the bus-type firefighting communication system of the first embodiment. In addition, the bus-type firefighting communication system of this embodiment may further include:

[0033] Fire telephone jack 7. The fire telephone jack 7 is connected between the two buses 6 and the fire telephone extension 2, or the fire telephone jack 7 is connected between the telephone jack module 3 and the ordinary telephone 4.

[0034] The fire telephone jack 7 plays a switching role in the system. It can transfer the two buses or the output bus of the telephone jack module to the connected equipment. For example, one end of the fire telephone jack 7 is connected to the fire telephone bus and the other end is connected Fire telephone extension 2; or, one end of the fire telephone jack 7 is connected to the telephone jack module 3, and the other end is connected...

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PUM

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Abstract

In the bus type fire communication system provided by this application, a transformer coupling unit is installed in the fire telephone switchboard, fire telephone extension and telephone jack module respectively, and the output audio signal is converted into an audio differential signal by the transformer coupling unit, and the audio adopts a differential mode on the bus Transmission, with better anti-interference ability, clear calls and improved call quality. At the same time, due to the low standby power consumption of the fire telephone extension and the telephone jack module, the bus transmission signal amplitude is sufficiently large and stable, and the signal transmission distance can be longer, so the bus length of the bus fire communication system can be extended. The fire telephone extension, the telephone jack module and the fire telephone jack are respectively equipped with non-polarity conversion modules, which are connected to the two buses through the non-polarity conversion module. Convenience and reduce connection errors.

Description

Technical field [0001] This application relates to a bus type fire fighting communication system. Background technique [0002] At present, there are mainly two types of fire fighting communication systems in the market: multi-line and two-line. The multi-wire fire communication system is not suitable for use in the on-site construction environment due to the many wiring, complexity, and high cost. Therefore, the two-wire fire communication system is usually used in engineering construction today. [0003] However, the inventor found in the research and practice of the prior art that the current two-wire fire communication system on the market has the following shortcomings: (1) The audio signal transmitted by the two-wire fire communication system on the bus is obtained by superposition The non-differential signal is easily affected by the environment and affects the call quality. (2) The bus of the two-wire fire communication system needs to distinguish the polarity when connec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04M3/18H04L12/40
Inventor 刘真照袁青青姚文虎曹子江
Owner 深圳市高新投三江电子股份有限公司
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