Application of RS485 for communication and synchronization in distributed electromagnetic exploration system

Author

Wenxiu, Zhang ; Jun, Lin ; Lili, Pen ; Jian, Chen

Author_Institution

Key Lab. of Geo-Exploration Instrum., Jilin Univ., Changchun, China

fYear

2011

fDate

15-17 April 2011

Firstpage

4815

Lastpage

4818

Abstract

In order to solve the data communication and acquisition synchronization problem of distributed electromagnetic exploration system for specific application environment and measurement mode, master slave distributed communication network with dual channels is constructed based on RS485 bus, thus multi-station data is received by master station quickly. The communication bus and measuring circuit is isolated completely to eliminate common mode voltage interference and ensure the stability and stability of data communication. This paper puts forward an improved scheme for line synchronization that trigger signal for starting acquisition is transferred using RS485 bus. By testing and analysis, the linear relationship between delay time of trigger signal and distance is obtained. Field experimental results show that synchronization precision is able to satisfy the requirements of the measurement after compensating delay time.

Keywords

data communication; electromagnetic interference; interference suppression; peripheral interfaces; synchronisation; telecommunication networks; RS485 bus; acquisition synchronization problem; common mode voltage; communication bus; data communication; distributed electromagnetic exploration system; dual channels; interference elimination; master slave distributed communication network; measurement mode; measuring circuit; multistation data; specific application environment; trigger signal; Delay; Global Positioning System; Instruments; Synchronization; Transmission line measurements; Voltage measurement; Distributed system; RS485; delay compensation; isolation; synchronization;

fLanguage

English

Publisher

ieee

Conference_Titel

Electric Information and Control Engineering (ICEICE), 2011 International Conference on

Conference_Location

Wuhan

Print_ISBN

978-1-4244-8036-4

Type

conf

DOI

10.1109/ICEICE.2011.5777542

Filename

5777542