Development of wireless structural health monitoring system for oil and gas pipelines
Damage detection and life prediction of structures are important technological issues in both the academic and industrial fields. Numerous techniques have been proposed and developed for the detection of early damage in structural members. Research shows that periodical or visual inspec...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English |
| Published: |
2019
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/85392/1/FK%202019%20148%20-%20ir.pdf http://psasir.upm.edu.my/id/eprint/85392/ |
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| Summary: | Damage detection and life prediction of structures are important technological issues in both the
academic and industrial fields. Numerous techniques have been proposed and developed for the
detection of early damage in structural members. Research shows that periodical or visual
inspections will not help resolve these issues, rather, having a continuous monitoring system is
required for a particular system such as NPP (Nuclear Power Plant). Currently, Non
Destructive Inspection (NDI) is used to inspect the area, however this can only be done in
offline mode. Structural Health Monitoring (SHM) offers various methods to resolve
issues such as these, nonetheless smart detecting methods are required before major
failures occur, in order to avoid catastrophic failures in future. SHM can monitor this situation
in active and passive states, either by online or offline monitoring. The use of SHM is to augment
the NDI application and not to replace it. Then, the costs of a wired detecting system is high per
channel, and requires focus on a wireless detecting method to reduce costs and avoid direct
contact with hazardous areas. The main objective of this research is to develop of a wireless
system or device embedded with a smart PZT sensor to detect flaws and structural defects on
a selected investigated structure. Smart PZT sensors were used as an actuator and sensor,
coupled with two XBees and one signal generator IC chip. The programme execution on the
transmission and receipt of the ultrasonic guided wave via the PZT sensor was written
in MATLAB. Basically, the developed source code is to receive serial data from one Xbee to
another remote Xbee which is attached to the investigated structural system. The refined waveform
response is utilised in an undergoing prognosis of the true structural status. The 4mm simulated
hole on the pipe structure is benchmarked against its pristine condition in validating the
effectiveness of the developed SHM wireless module. A marker plot software and Arduino
micro controllers was used in wireless module for a further analysis and interpretation of
results. The acquired results showed that no change for the pattern of wave in non-defected
areas and despite being disrupted in the affected areas. The guided waves from wireless SHM system are able to propagate
long distances and reach difficult access regions, hence the ultrasonic waveform device are
continuously increasing for non-destructive evaluation and structural health monitoring in various
structural applications. |
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