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A wireless communication converter from rs485 to eight-way rs232

A RS485, wireless communication technology, applied in transmission systems, electrical components, etc., can solve the problems of inconvenient wired communication, complicated wiring, mutual interference, etc., to save test time, simplify circuits, and improve security.

Active Publication Date: 2021-02-23
SHANGHAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of inconvenient wired communication and complicated wiring in data communication, and provide a design of a wireless communication converter from RS485 to eight-way RS232, so as to avoid multiple wireless interferences and make the control simpler

Method used

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  • A wireless communication converter from rs485 to eight-way rs232
  • A wireless communication converter from rs485 to eight-way rs232
  • A wireless communication converter from rs485 to eight-way rs232

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] see Figure 1 to Figure 4 , this RS485 turns the wireless communication converter of eight-way RS232, and described RS485 transceiver control circuit (104) connects a first wireless transceiver module (103) and a RS485 communication circuit (102), and the first wireless transceiver module (103) connects A first isolated power supply circuit (105), RS485 communication circuit (102) connects the first wireless transceiver module (103) and a PC (101); the first wireless transceiver module (103) wireless communication connects the second wireless transceiver module ( 106), the second wireless transceiver module (106) is connected to a second isolated power supply circuit (108) and a 1-way to 8-way TTL circuit (107); a 1-way to 8-way TTL circuit (107) via 8 RS232 Turn to TTL circuit (113-120) and connect 8 slaves (121-128) respectively; There are four third isolated power supply circuits (109-112) respectively connected to two RS232 to TTL circuits.

Embodiment 2

[0025] Embodiment 2: This embodiment is basically the same as Embodiment 1, and the special features are as follows:

[0026] In the described 1-way to 8-way TTL circuit (107), a logic "wired-AND" method is adopted, as long as simple logic chips (U3, U6) are used to expand the 1-way transceiver signal into 8-way transceiver signal, The circuit is simplified and the circuit efficiency is improved. Adopt described first, second and third isolated power circuit (105,108-112) to supply power to 232 chips, first and second wireless transceiver module (103,106) and RS485 communication circuit (102); 8 roads The slaves are divided into 4 groups, each group has 2 routes, each 2 routes are controlled by a 232 chip, and each 232 chip is powered by an isolated power supply, which is independent of each other and does not affect each other, so that the 4 groups of slaves will not be damaged due to a certain group of power supplies , while affecting the other groups. At the same time, th...

Embodiment 3

[0028] This RS485 to eight-way RS232 wireless communication converter, such as figure 1 As shown, it includes RS485 transceiver control circuit (104), 1-way to 8-way TTL circuit (107), RS485 communication circuit (102), RS232 to TTL circuit (113-120), first, second and third isolated power supplies Circuitry (105, 108, 109-112) and first and second radio transceiver modules (103, 106).

[0029] 1. Introduction to the work of each circuit module of the equipment

[0030] The RS485 communication circuit (102) adopts a 485 chip with built-in high-energy transient noise, which improves reliability and has the property of anti-lightning strike at the same time. In order to prevent a chip from being broken down and short-circuited, a 20Ω resistor is connected in series at the 485 signal output terminal. The function of this circuit is to convert 485 signal and TTL signal. Such as figure 2 As shown, the A and B pins of the 485 chip U4 are respectively connected with 20Ω resistor...

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Abstract

The invention relates to a wireless communication converter from RS485 to eight-way RS232, which is a wireless communication protocol based on serial data interface standards and belongs to the technical field of wireless communication. The converter is composed of RS485 transceiver control circuit, 1-channel to 8-channel TTL circuit, RS485 communication circuit, RS232 to TTL circuit, isolated power supply circuit, and wireless transceiver module. Among them, the RS485 transceiver control circuit is used to switch the sending and receiving status of 485 communication; the 1-channel to 8-channel TTL circuit makes one receiving terminal become an 8-channel connecting terminal, and one transmitting terminal becomes an 8-channel transmitting terminal; the RS485 communication circuit Realize the communication conversion between RS485 and TTL; in the RS232 to TTL circuit, realize the conversion of the serial communication protocol; 8 pieces of 232 chips are divided into 4 groups, each group has 2 pieces, and are powered by 4 power isolation circuits without affecting each other; wireless transceiver module Responsible for data communication. The selection of the chip and the design of the circuit in the present invention simplifies the circuit, avoids the mutual interference of multiple wireless channels, improves the safety and reliability of the converter, and at the same time reduces the artificial cost and improved work efficiency.

Description

technical field [0001] The invention relates to an RS485-to-eight-way RS232 wireless communication converter, which is a wireless communication protocol based on serial data interface standards and belongs to the technical field of wireless communication. Background technique [0002] In the traditional data communication method, the signal is usually transmitted by wire, which often causes electromagnetic interference and signal weakening, and when the wire is plugged and unplugged, static electricity may be generated or the electrical equipment may be damaged when there is a potential difference . Wired data communication is not suitable in some places, such as windows, boxes, etc., and wiring is not convenient. The introduction of wireless transmission can overcome the above shortcomings, while also avoiding complicated line connections. Through the wireless network, the transparent transmission of data between serial devices is realized. [0003] Although wireless is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/40H04L29/06
CPCH04B1/40H04L69/08
Inventor 张雪凡张其洋周伟刘源黄诗童
Owner SHANGHAI UNIV
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