Half-duplex communication device and communication system

By designing modulation, demodulation circuits and isolated power supply circuits in half-duplex communication devices and establishing bidirectional current loops, the problem of insufficient stability of traditional chips at long-distance data transmission is solved, and long-distance communication with high stability and anti-interference capabilities is achieved.

CN222884690UActive Publication Date: 2025-05-16SHENHUA SHENDONG COAL GRP +1
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Patent Information

Application Number
CN202421913889.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-08-07
Publication Date
2025-05-16
Estimated Expiration
2034-08-07

AI Technical Summary

Technical Problem

In the prior art, chips such as RS485, RS232 and RS422 are used to transmit long-distance data poorly, especially in complex electromagnetic environments and long-distance transmission scenarios.

Method used

A half-duplex communication device is designed to convert digital signals into analog current signals using modulation circuits and demodulation circuits, and a bidirectional current loop is established through an isolated power supply circuit to ensure stable signal transmission.

Benefits of technology

By using current transmission signals, the stability and anti-interference ability of long-distance data transmission are improved. The communication distance is not related to the transmission distance, but is only related to the driving current, and is suitable for long-distance bidirectional communications above 10km.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a half-duplex communication device and a communication system. The half-duplex communication device comprises a modulation circuit used for converting a first digital signal pre-sent by a sending device to a receiving device into a first analog current signal and sending the first analog current signal to the receiving device; the demodulation circuit is used for converting a second analog current signal pre-sent to the sending device by the receiving device into a second digital signal and sending the second digital signal to the sending device; and the isolation power supply circuit is used for isolating the modulation circuit and the demodulation circuit, so that a current loop is formed between the transmitting equipment and the receiving equipment. According to the scheme, the problem that in the prior art, the stability is poor when remote data transmission is carried out through chips such as RS485, RS232 and RS422 is solved.
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