Leak detection in pipelines through spectral analysis of pressure signals

Souza, Alexandre Lima de; Cruz, Sandra Lúcia da; Pereira, Juliana Francisco

doi:10.1590/s0104-66322000000400020

Cited by 14 publications

(3 citation statements)

References 2 publications

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“…Analysis of the pressure signal can also be undertaken in the frequency domain, either via Fourier analysis (Mohapatra et al, 2006; Ferrante & Brunone, 2003a; Mpesha et al, 2002, 2001; Wang et al, 2002; Souza et al, 2000) o r, more effectively, with wavelet functions that allow the denoiseing of the pressure signal (Ferrante & Brunone, 2003b; Stoivanov et al, 2001).…”

Section: Technique Builds On Previous Researchmentioning

confidence: 99%

Portable pressure wave‐maker for leak detection and pipe system characterization

Brunone¹,

Ferrante²,

Meniconi³

2008

Journal AWWA

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This article illustrates the performance of the portable pressure wave maker (PPWM; patent pending) device for leak detection and pipe characterization used in the water engineering laboratory of the University of Perugia, Italy. The device consists of a steel vessel filled with pressurized air and water that is connected to a test pipe by a short conduit with a connection valve at its end. By a pressure value being fixed in the PPWM that is higher than the pressure in the pipe, a pressure wave propagates in the line when the connection valve is opened. Singularities (e.g., junctions, partial blockages, and leaks) will give rise to the formation of reflected waves whose arrival time and amplitude—recorded in one or more sections of the pipe—allow their detection. Because of its modest dimensions, the PPWM can easily be carried to plants and facilities as part of a transient test‐based leak‐detection and system‐characterization campaign. First, experimental evidence of PPWM device behavior for pipe characterization is shown. Then optimal operational conditions are determined by means of a numerical model and are tested in the laboratory. Finally, a simple formula for evaluating the generated pressure wave is given.

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Section: Technique Builds On Previous Researchmentioning

confidence: 99%

Portable pressure wave‐maker for leak detection and pipe system characterization

Brunone¹,

Ferrante²,

Meniconi³

2008

Journal AWWA

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show abstract

“…Complicated operational environments are often encountered in various machinery systems, such as those used in forest fires 1 , mining metallurgy, mine environmental monitoring 2 , industrial pipelines 3 , and aircraft 4 . Making matters more difficult, most state-of-art sensors are designed for measuring a single parameter [5][6][7] , whereas multiparameter sensors with small volume, high performance, and single-chip integration are more promising solutions in these conditions.…”

Section: Introductionmentioning

confidence: 99%

Temperature, pressure, and humidity SAW sensor based on coplanar integrated LGS

Liang,

Zhang,

Tan

et al. 2023

Microsyst Nanoeng

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This paper presents a surface acoustic wave (SAW) sensor based on coplanar integrated Langasite (LGS) that is fabricated using wet etching, high-temperature bonding, and ion beam etching (IBE) processes. The miniaturized multiparameter temperature‒pressure-humidity (TPH) sensor used the MXene@MoS2@Go (MMG) composite to widen the humidity detection range and improve the humidity sensitivity, including a fast response time (3.18 s) and recovery time (0.94 s). The TPH sensor was shown to operate steadily between 25–700 °C, 0–700 kPa, and 10–98% RH. Coupling issues among multiple parameters in complex environments were addressed by decoupling the Δf-temperature coupling factor to improve the accuracy. Therefore, this work can be applied to simultaneous measurements of several environmental parameters in challenging conditions.

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“…The operation of equipment is usually accompanied by the influence of temperature, pressure, humidity, and other complicated environmental factors. Examples of these factors include forest fire 1 , mining metallurgy, mine environmental monitoring 2 , industrial pipeline 3 , aircraft 4 , etc. Most sensors in the previous studies are only designed for measuring one parameter [5][6][7] .…”

Section: Introductionmentioning

confidence: 99%

Temperature/Pressure/Humidity Coplanar Integrated SAW Sensor Based on LGS

Tan

Liang

Zhang

et al. 2023

Preprint

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In this paper, a three-parameter coplanar-integrated surface acoustic wave sensor based on Langasite is proposed. The micro-scale multi-parameter coplanar Temperature-Pressure-Humidity (TPH) sensor was developed by Micro-Electro-Mechanical System (MEMS) techniques such as wet etching, hot pressing bonding, and lifting off. The Mxene@ MoS2@Go (MMG) composite material was used as the humidity-sensitive material to enlarge the range of the humidity test and improve the sensitivity of the sensor test, and the humidity-sensitive unit shows high performance with a fast response time (3.18 s) and recovery time (0.94 s). The TPH sensor has been tested, and the experimental results indicate that the sensor can operate steadily at 25–700°C, 0-700 kPa, and 10–98% RH. Besides, a temperature decoupling approach is presented to address the issue of multi-parameter mutual coupling and improve the measurement accuracy of the sensitive unit while measuring several parameters at the same time. These excellent results are attributed to the coupling between many parameters in complex environments. Also, our work can be applied to the simultaneous measurement of several parameters in challenging conditions.

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Leak detection in pipelines through spectral analysis of pressure signals

Cited by 14 publications

References 2 publications

Portable pressure wave‐maker for leak detection and pipe system characterization

Portable pressure wave‐maker for leak detection and pipe system characterization

Temperature, pressure, and humidity SAW sensor based on coplanar integrated LGS

Temperature/Pressure/Humidity Coplanar Integrated SAW Sensor Based on LGS

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