Determlning And Mapplng Dnapl Saturation Values From Nonlnvasive Gpr Measurements

Sneddon, Kristen W.; Olhoeft, Gary R.; Powers, Michael H.

doi:10.3997/2214-4609-pdb.200.2000_035

Cited by 3 publications

(1 citation statement)

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“…A customary approach is resorting to proficient technicians capable of handling non-invasive geophones on the ground and quantifying acoustic abnormalities throughout the topography. Similarly, infrared thermography [ 6 ], ground-penetrating radars [ 7 ], and sensors detecting vibration signatures [ 8 ] have also been proposed, aiming at the same objective.…”

Section: Introductionmentioning

confidence: 99%

A Pipe-Embeddable Impedance Sensor for Monitoring Water Leaks in Distribution Networks: Design and Validation

Carminati

2023

Sensors

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Water leakage is one of main problems of distribution infrastructures, reaching unacceptable peaks of 50% of water lost in old networks in several countries. In order to address this challenge, we present an impedance sensor able to detect small water leaks (below 1 L of released volume). The combination of real-time sensing and such a sensitivity allows for early warning and fast response. It relies on a set of robust longitudinal electrodes applied on the external surface of the pipe. The presence of water in the surrounding medium alters its impedance in a detectable way. We report detailed numerical simulations for the optimization of electrode geometry and sensing frequency (2 MHz), as well as the successful experimental proof in the laboratory of this approach for a pipe length of 45 cm. Moreover, we experimentally tested the dependence of the detected signal on the leak volume, temperature, and morphology of the soil. Finally, differential sensing is proposed and validated as a solution to reject drifts and spurious impedance variations due to environmental effects.

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Section: Introductionmentioning

confidence: 99%

A Pipe-Embeddable Impedance Sensor for Monitoring Water Leaks in Distribution Networks: Design and Validation

Carminati

2023

Sensors

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Water Leak Monitoring by Means of a Wireless Network of Impedance Sensing Nodes

Castillo,

Crafa,

Riboldi

et al. 2023

2023 IEEE Conference on AgriFood Electronics (CAFE)

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Design and Characterization of a Pressure Sensor Based on FBG on Steel Substrate

Andò

Baglio

Pistorio

et al. 2019

7th International Symposium on Sensor Science

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In this paper a new optical, Fiber Bragg Grating (FBG) based, pressure sensor is presented. The sensor adopts a stainless steel membrane with a FBG sensor attached and is thought to be used in a multi parametric multi-sensor system aimed at the detection of water leakages in potable water networks. The sensor has been experimentally characterized on a reference plant in the range of pressure 0–6 bar. Main metrological characteristics of the lab-scale prototype developed are: a sensitivity of 0.314 nm/bar, an accuracy of about 39 mbar and a resolution of about 1.5 mbar.

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Determlning And Mapplng Dnapl Saturation Values From Nonlnvasive Gpr Measurements

Cited by 3 publications

References 0 publications

A Pipe-Embeddable Impedance Sensor for Monitoring Water Leaks in Distribution Networks: Design and Validation

A Pipe-Embeddable Impedance Sensor for Monitoring Water Leaks in Distribution Networks: Design and Validation

Water Leak Monitoring by Means of a Wireless Network of Impedance Sensing Nodes

Design and Characterization of a Pressure Sensor Based on FBG on Steel Substrate

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