Severalsolutionsofremotetransmissionforstatemonitoringofbridges*(2005年)资源-CSDN文库

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J Chongqing Univ.-Eng. Ed.

Computer Science & Application

Vol. 4 No. 2

June 2005

Article ID: 1671-8224(2005)02- 0080-04

Several solutions of remote transmission for state monitoring of bridges

LIANG Zong-bao

1,a

, CHEN Wei-min

, ZHU Yong

, FU Yu-mei

, XU Mou

, YANG Hong

Key Laboratory of Optoelectronic Technology and Systems Under the State Ministry of Education,

Chongqing University, Chongqing 400030, P.R. China

Chongqing Expressway Development Co. Ltd., Chongqing 400010, P.R. China

Received 30 November 2004; revised 30 May 2005

Abstract: The research for remote monitoring of bridges is expected to develop methodologies and tools for collecting state data,

monitoring the real-time status of the bridge from distance, and more importantly seeking a best way for remote transmission of

bridge monitoring system by comparing the characteristics of each scheme. This paper focuses on the solutions to remote

transmission for state monitoring of bridges, which deals with the remote transmission system based on PSTN (Public Service

Telephone Network), wireless sensor monitoring system and remote transmission using SDH (Synchronous Digital Hierarchy)

network. As a result, a combination of wireless sensor monitoring system and the remote sensing system using SDH network is

proposed to be the considered way for remote state monitoring of bridges.

Keywords: remote monitoring; bridge; wireless sensor; SDH network

CLC number: TP29; Document code: A

1 Introduction

The safety and security of bridges have come to be a

particular concern by engineers and managers in the

recent decades. With the great development of traffic

and transportation, a number of highway bridges are

expected to be monitored automatically in a monitoring

center far from the field. But it is difficult to

accomplish the remote monitoring process by

conventional methods, in which the state information

of bridge have to be collected manually and the data

processing done in the laboratory. This results in large

cost of time, money and human resources.

The declining cost of electronic, network, computing

and communication technologies, coupled with

growing capabilities at rates espoused by Moore’s Law

[1] has led to the emergence of remote sensing

technologies which are rapidly changing the status. As

a successful example, kinds of remote systems were

installed in bridges for real-time monitoring of service

behaviors.

Chen Weimin, et al. [2] constructed a remote

monitoring system based on Public Service

LIANG Zong-bao (

梁宗保

): Male; Born 1968; PhD candidate;

Research interest: health monitoring and safety assessing of

bridge structure; E-mail: Liangjj8@163.com

Funded by the National Key Technologies R&D Program (No.

2002BA105C)

Telecommunication Network(PSTN),which was used

for the state monitoring of Hongcaofang Crossroad

Bridge in Chongqing. Eric G. Straser, et al. [3]

proposed a remote monitoring technology named

embedded wireless sensor monitoring system, which

was successfully used in a full-scale experiment of the

Alamosa Canyon Bridge in New Mexico.

Generally, a remote monitoring system consists of an

on-line automatic measuring system and a remote

transmission system, integrated by sensors, a local

computer, local transmitter, remote transmitter and host

computer. The diagram of a remote monitoring system

is shown in Fig. 1. The state parameters can be

measured automatically and periodically by on-line

automatic measuring system and the state information

of bridge can be transmitted to the specified location by

the remote transmission system.

Obviously, the remote transmission system is the

important premise for remote monitoring of bridges. It

is of practical significance to explore an optimum

strategy by comparing several kinds of remote

Sensor Unit 1

Sensor Unit 2

Sensor Unit n

Local

Computer

Host

Computer

Local

Transmission

Remote

Transmission

Fig.1 Diagram of remote monitoring system

Sensors

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