Single-bus two-way communication circuit
A two-way communication, single-bus technology, applied in the bus network, data exchange through path configuration, electrical components, etc., can solve the problems of fragile communication chips, no communication mode, poor anti-interference, etc., to achieve strong anti-interference, Overcome the effect of poor anti-interference and low cost
Active Publication Date: 2012-11-14
CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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Problems solved by technology
[0005] The obvious disadvantages of the prior art are: there is no complete communication mode, while maintaining the original underground communication line, it can not only overcome the disadvantages of poor anti-interference and short distance, but also overcome the disadvantages of easy damage of the communication chip
Method used
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[0037] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0038] Such as figure 1 As shown, a single bus two-way communication circuit is provided with a control circuit 1, the output end of the control circuit 1 is connected to the downlink port of the first input circuit 2 and the uplink port of the receiving circuit 3;
[0039] The control circuit 1 is composed of a second triode Q2, a third triode Q3 and a fifth resistor R5, one end of the fifth resistor R5 is the control signal input RTS end, and the other end of the fifth resistor R5 is connected to the third The base of the transistor Q3, the emitter of the third transistor Q3 is grounded, the collector is connected to the base of the second transistor Q2, the emitter of the second transistor Q2 is grounded, and the second The collector of the transistor Q2 is the output terminal of the control circuit 1 .
[0040] The first input c...
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The invention discloses a single-bus two-way communication circuit which is characterized by being provided with a control circuit. The output end of the control circuit is connected with a downlink port of a first input circuit and an uplink port of a receiving circuit; the control circuit comprises a second triode, a third triode and a fifth resistor; one end of the fifth resistor is a control signal input RTS (Remote Terminal System) end, while the other end of the fifth resistor is connected with a base electrode of the third triode; an emitting electrode of the third triode is grounded; a collector electrode is connected with a base electrode of the second triode; an emitting electrode of the second triode is grounded; and a collector electrode of the second triode is the output end of the control circuit. The single-bus two-way communication circuit has the function of single-bus single / double communication, can stably and reliably carry out remote transmission and has low powerconsumption, convenient and safe use, no need of isolation, strong interference resistance, low error rate and low cost.
Description
technical field [0001] The invention belongs to a communication device, in particular to an underground single-bus bidirectional communication circuit. Background technique [0002] In the coal mine safety monitoring system, various important underground information such as gas, CO and other important environmental parameter information, equipment operation information, and personnel location information can be quickly and accurately transmitted to the underground monitoring sub-station and ground dispatching center, providing coal mine Safe production provides important safety guarantees. Therefore, communication technology plays a key role. [0003] At present, the comprehensive automation level of coal mines in my country is constantly improving, and at the same time, the underground working environment is becoming more and more complicated; especially the electromagnetic interference system has brought a severe test to the quality of data communication. Most of the und...
Claims
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IPC IPC(8): H04L1/00H04L12/40
Inventor 赵光绪樊荣汤朝明王蒙郭江涛
Owner CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD