Application of EM Stress Sensors in Large Steel Cables

Wang, Ming L.; Wang, G.; Yang, Zhao

doi:10.1007/1-4020-3661-2_15

Cited by 51 publications

(43 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Wang et al further studied the relationship between magnetic permeability and stress during the prestressing of tendons on a prestressed concrete bridge and showed that relative permeability varies linearly with stress . The researchers confirmed the effect of temperature changes that have previously been discussed in depth in the study of Chen by conducting a laboratory test where temperature was varied and relative permeability of steel strands was measured under zero stress.…”

Section: Elasto‐magnetic Methodsmentioning

confidence: 72%

Monitoring of prestressing forces in prestressed concrete structures—An overview

Abdel-Jaber

Glišić

2019

Struct Control Health Monit

View full text Add to dashboard Cite

This paper presents an overview of currently available methods for monitoring prestressing forces in prestressed concrete structure. Structural health monitoring has become an increasingly important tool for assessment of structural performance. Additionally, the value of the prestressing force represents an important parameter in prestressed concrete structures. Thus, several methods for monitoring prestress forces have emerged. This paper aims to consolidate the work performed in the area of prestressing force monitoring by presenting the most important advances and the directions for future research. The methods presented in this paper are based on indirect monitoring of the prestressing force through monitoring of another relevant parameter. They are divided into five general classes based on the relevant parameter they monitor:(a) vibration-based methods (based on acceleration), (b) impedance-based methods (based on electrical impedance), (c) acoustoelastic methods (based on wave velocity), (d) elasto-magnetic methods (based on magnetic permeability), and (e) strain-based methods (based on strain). The paper presents a table summarizing the comparison between the methods based on defined criteria.

show abstract

Section: Elasto‐magnetic Methodsmentioning

confidence: 72%

Monitoring of prestressing forces in prestressed concrete structures—An overview

Abdel-Jaber

Glišić

2019

Struct Control Health Monit

View full text Add to dashboard Cite

show abstract

“…Several methods for estimating the cable tension are available including: direct measurement using a load cell, non-contact technique using electromagnetic (EM) stress sensors [1] , and several estimation methods based on vibration measurements. Due to the convenience and cost effectiveness of sensor installation, the vibration-based methods have been recognized to be efficient in practice.…”

Section: Introductionmentioning

confidence: 99%

Automated wireless monitoring system for cable tension using smart sensors

Sim

et al. 2013

SPIE Proceedings

View full text Add to dashboard Cite

Cables are critical load carrying members of cable-stayed bridges; monitoring tension forces of the cables provides valuable information for SHM of the cable-stayed bridges. Monitoring systems for the cable tension can be efficiently realized using wireless smart sensors in conjunction with vibration-based cable tension estimation approaches. This study develops an automated cable tension monitoring system using MEMSIC's Imote2 smart sensors. An embedded data processing strategy is implemented on the Imote2-based wireless sensor network to calculate cable tensions using a vibration-based method, significantly reducing the wireless data transmission and associated power consumption. The autonomous operation of the monitoring system is achieved by AutoMonitor, a high-level coordinator application provided by the Illinois SHM Project Services Toolsuite. The monitoring system also features power harvesting enabled by solar panels attached to each sensor node and AutoMonitor for charging control. The proposed wireless system has been deployed on the Jindo Bridge, a cable-stayed bridge located in South Korea. Tension forces are autonomously monitored for 12 cables in the east, land side of the bridge, proving the validity and potential of the presented tension monitoring system for real-world applications.

show abstract

“…It can directly obtain the incremental permeability to measure the actual stress in a noncontact way [16,17,18]. Thus, it has been used to monitor the stress in steel cables on field more than ten years.…”

Section: Introductionmentioning

confidence: 99%

A Steel Wire Stress Measuring Sensor Based on the Static Magnetization by Permanent Magnets

Deng

Zuo

2016

Sensors

View full text Add to dashboard Cite

A new stress measuring sensor is proposed to evaluate the axial stress in steel wires. Without using excitation and induction coils, the sensor mainly consists of a static magnetization unit made of permanent magnets and a magnetic field measurement unit containing Hall element arrays. Firstly, the principle is illustrated in detail. Under the excitation of the magnetization unit, a spatially varying magnetized region in the steel wire is utilized as the measurement region. Radial and axial magnetic flux densities at different lift-offs in this region are measured by the measurement unit to calculate the differential permeability curve and magnetization curve. Feature parameters extracted from the curves are used to evaluate the axial stress. Secondly, the special stress sensor for Φ5 and Φ7 steel wires is developed accordingly. At last, the performance of the sensor is tested experimentally. Experimental results show that the sensor can measure the magnetization curve accurately with the error in the range of ±6%. Furthermore, the obtained differential permeability at working points 1200 A/m and 10000 A/m change almost linearly with the stress in steel wires, the goodness of linear fits are all higher than 0.987. Thus, the proposed steel wire stress measuring sensor is feasible.

show abstract

Application of EM Stress Sensors in Large Steel Cables

Cited by 51 publications

References 5 publications

Monitoring of prestressing forces in prestressed concrete structures—An overview

Monitoring of prestressing forces in prestressed concrete structures—An overview

Automated wireless monitoring system for cable tension using smart sensors

A Steel Wire Stress Measuring Sensor Based on the Static Magnetization by Permanent Magnets

Contact Info

Product

Resources

About