A Practical Monitoring System for the Structural Safety of Mega-Trusses Using Wireless Vibrating Wire Strain Gauges

Park, Hyo Seon; Lee, Hwan Young; Choi, Sanghee; Kim, Yousok

doi:10.3390/s131217346

Cited by 32 publications

(12 citation statements)

References 39 publications

(23 reference statements)

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“…e vibrating wire strain gauge (VWSG) [16,17] and crack reopening method [18,19] are two kinds of methods to measure the existing prestressed structures. VWSG is a nondestructive technique; however, crack reopening method to detect existing stress is a semidestructive method.…”

Section: Introductionmentioning

confidence: 99%

A Stress Measurement Method for Steel Strands Based on LC Oscillation

Chen

Zhang

et al. 2018

Advances in Materials Science and Engineering

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e prestress loss is one of the main factors affecting the safety of prestressed concrete structure. While the detecting signals like sound and light are difficult to spread in steel strands, there is no effective method for prestress detection of the bonded prestressed steel strands in existing structures yet. In this paper, taking into consideration that the electromagnetic oscillation characteristic can make the signal propagate effectively on the bonded prestressed steel strands, a nondestructive prestress detection method based on the electromagnetic effect to detect oscillation frequency is proposed. In a detection circuit, the steel strands are simulated as an inductance component, in which an induced electromagnetic signal passes through the steel strands to form resonance. And then, a frequency meter is used to detect the oscillation frequency of the resonant circuit. e oscillation frequency is supposed to have relationship with the prestress loading on the steel strands. A section of steel strands with a length of 1.2 m is adopted to test the correlation of stress and oscillation frequency. Both the theoretical and experimental results show that the resonant frequency of the circuit decreases with the increase of the stress of the strand and is linear in a certain range.

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Section: Introductionmentioning

confidence: 99%

A Stress Measurement Method for Steel Strands Based on LC Oscillation

Chen

Zhang

et al. 2018

Advances in Materials Science and Engineering

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“…When the ambient temperature changes, the vibrating wire strain gauge material and the measured structural material have different linear expansion coefficients, and the sensor is subjected to additional stretching or compression. The additional strain can be expressed as Equation (19):…”

Section: Of 16mentioning

confidence: 99%

“…The feasibility of a parallel measurement scheme was verified [18]. Under the condition of different prestresses, this experiment studied the influencing relationship of temperature corresponding variable [19,20]. We focused on researching the influence of temperature and prestress effect on sensors by analyzing differences of their measurement results in a specified situation.…”

Section: Introductionmentioning

confidence: 99%

Temperature and Strain Correlation of Bridge Parallel Structure Based on Vibrating Wire Strain Sensor

Peng

Jing

Luo

et al. 2020

Sensors

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Deformation is a ubiquitous phenomenon in nature. This process usually refers to the change in shape, size, and position of an object in the time and spatial domain under various loads. Under normal circumstances, during engineering construction, technicians are generally required to monitor the safe operation of structural facilities in the transportation field and the health of bridge, because monitoring in the engineering process plays an important role in construction safety. Considering the reliability risk of sensors after a long-time work period, such as signal drift, accurate measurement of strain gauges is inseparable from the value traceability system of high-precision strain gauges. In this study, two vibrating wire strain gauges with the same working principle were measured using the parallel method at similar positions. First, based on the principle of time series, the experiment used high-frequency dynamic acquisition to measure the thermometer strain of two vibrating wire strain gauges. Second, this experiment analyzed the correlation between strain and temperature measured separately. Under the condition of different prestress, this experiment studied the influencing relationship of temperature corresponding variable. In this experiment, the measurement repetitiveness was analyzed using the meteorology knowledge of single sensor data, focused on researching the influence of temperature and prestress effect on sensors by analyzing differences of their measurement results in a specified situation. Then, the reliability and stability of dynamic vibrating wire strain gauge were verified in the experiment. The final conclusion of the experiment is the actual engineering in the later stage. Onsite online meteorology in the application provides support.

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“…Its simple and solid construction ensures high resistance to mechanical damage and insensitivity to atmospheric conditions. It is also possible to use wireless communication between the transducer and the measuring system (Park et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

The application of self-oscillation in wire gauges

Cieplok¹,

Kopij²

2017

jtam

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In the presented paper, an original solution to the system maintaining vibrations of a wire transducer, which has been based upon the phenomenon of self-oscillation, is described. The vibrations generated in this manner do not fade in time, are resistant to disturbances and allow measurement of the signal rapidly changing in time. The dynamic equations and numerical simulations of motion of the wire interconnected with the van der Pol oscillator are presented. Based on the conceptual model, a laboratory stand has been built, which served to verify properties of the presented solution and possibilities of useful applications.

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A Practical Monitoring System for the Structural Safety of Mega-Trusses Using Wireless Vibrating Wire Strain Gauges

Cited by 32 publications

References 39 publications

A Stress Measurement Method for Steel Strands Based on LC Oscillation

A Stress Measurement Method for Steel Strands Based on LC Oscillation

Temperature and Strain Correlation of Bridge Parallel Structure Based on Vibrating Wire Strain Sensor

The application of self-oscillation in wire gauges

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