MEMS sensor-based monitoring system for engineered geological disposal facilities

AbstractThe design of a novel MEMS (Micro-Electro-Mechanical System) sensor-based monitoring system is presented in this article for the in situ monitoring of the conditions (temperature, relative humidity) of an engineered bentonite barrier for the underground disposal of radioactive waste in a geological disposal facility (GDF). A first prototype of the monitoring system incorporating multiple state-of-the-art MEMS sensors has been developed on a PCB-based (Printed Circuit Board) structure, in order to measure the variation of temperature and relative humidity inside a cylindrical bentonite block during the hydration process. The monitoring system comprises separate sensor boards, the microcontroller-equipped interface board and the software user interface in the Labview environment. One of the main design priorities is to reduce the size of the embedded sensors in order to minimize their influence on the hydro-mechanical response of the bentonite block. The sensor boards are encapsulated in different manners to protect them from moisture, chemical corrosion and mechanical shocks. The sensor system has been tested and calibrated in the temperature range between –20°C and 120°C, and at different relative humidity levels implemented by saturated salt solutions in enclosed containers. Test results demonstrate that the sensors have shown good functionality and robustness in harsh test environments such as high temperature and high humidity. Both temperature and relative humidity sensors have shown satisfactory precision level and temporal stability, which are in good accordance with the design specification of these devices.

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Development of a MEMS Sensor System for In-Situ Monitoring of the Engineered Barrier in a Geological Disposal Facility

10.20944/preprints201705.0066.v1 ◽

2017 ◽

Author(s):

Wenbin Yang ◽

Rebecca J Lunn ◽

Alessandro Tarantino ◽

Gráinne El Mountassir

Keyword(s):

Relative Humidity ◽

Radioactive Waste ◽

Swelling Pressure ◽

Geological Disposal ◽

Sensing System ◽

Mems Sensor ◽

Polyurethane Resin ◽

Disposal Facility ◽

Engineered Barriers

Geological disposal facilities for radioactive waste pose significant challenges for robust monitoring of environmental conditions within the engineered barriers that surround the waste canister. Temperatures are elevated, due to the presence of heat generating waste, relative humidity varies from 20% to 100%, and swelling pressures within the bentonite barrier can typically be 2-10 MPa. Here, we test the robustness of a bespoke design MEMS sensor-based monitoring system, which we encapsulate in polyurethane resin. We place the sensor within an oedometer cell and show that despite a rise in swelling pressure to 2 MPa, our relative humidity (RH) measurements are unaffected. We then test the sensing system against a traditional RH sensor, using saturated bentonite with a range of RH values between 50% and 100%. Measurements differ, on average, by 2.87% RH, and a particularly far apart for high values of RH. However, bespoke calibration of the MEMS sensing system using saturated solutions of known RH, reduces the measurement difference to an average of 1.97% RH, greatly increasing the accuracy for RH values close to 100%.

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The WSN Monitoring System for Large Outdoor Advertising Boards Based on ZigBee and MEMS Sensor

IEEE Sensors Journal ◽

10.1109/jsen.2017.2770324 ◽

2018 ◽

Vol 18 (3) ◽

pp. 1314-1323 ◽

Cited By ~ 13

Author(s):

Haonan Wang ◽

Linxi Dong ◽

Wei Wei ◽

Wen-Sheng Zhao ◽

Kuiwen Xu ◽

...

Keyword(s):

Monitoring System ◽

Outdoor Advertising ◽

Mems Sensor

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A Small Size Environment Monitoring System for Solid Booster

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.148-149.1021 ◽

2011 ◽

Vol 148-149 ◽

pp. 1021-1024 ◽

Cited By ~ 1

Author(s):

Wei Dong Huang ◽

Hong Lv ◽

Yu Tang Sui

Keyword(s):

Monitoring System ◽

Test Results ◽

Environment Monitoring ◽

Mems Sensor

The requirements of environment monitoring system for solid booster of shipboard missile were analyzed, and the scheme of environment monitoring system based on microcontroller and MEMS sensor was present. The hardware units and typical hardware circuits were given. According to the circuits, the PCB board was designed, and the prototype of environment monitoring system was made and tested. It was shown by the test results the designed system can be used for solid booster environment monitoring.

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Patient Food Intake Monitoring System Using Mems Sensor

International Journal of VLSI & Signal Processing ◽

10.14445/23942584/ijvsp-v8i2p102 ◽

2021 ◽

Vol 8 (2) ◽

pp. 5-9

Author(s):

Philip Austin M

Keyword(s):

Food Intake ◽

Monitoring System ◽

Mems Sensor

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Laboratory Testing of a MEMS Sensor System for In-Situ Monitoring of the Engineered Barrier in a Geological Disposal Facility

10.20944/preprints201705.0066.v2 ◽

2017 ◽

Author(s):

Wenbin Yang ◽

Rebecca J. Lunn ◽

Alessandro Tarantino ◽

Gráinne El Mountassir

Keyword(s):

Relative Humidity ◽

Swelling Pressure ◽

In Situ Monitoring ◽

Geological Disposal ◽

Sensing System ◽

Mems Sensor ◽

Polyurethane Resin ◽

Disposal Facility ◽

Engineered Barriers

Geological disposal facilities for radioactive waste pose significant challenges for robust monitoring of environmental conditions within the engineered barriers that surround the waste canister. Temperatures are elevated, due to the presence of heat generating waste, relative humidity varies from 20% to 100%, and swelling pressures within the bentonite barrier can typically be 2-10 MPa. Here, we test the robustness of a bespoke design MEMS sensor-based monitoring system, which we encapsulate in polyurethane resin. We place the sensor within an oedometer cell and show that despite a rise in swelling pressure to 2 MPa, our relative humidity (RH) measurements are unaffected. We then test the sensing system against a traditional RH sensor, using saturated bentonite with a range of RH values between 50% and 100%. Measurements differ, on average, by 2.87% RH, and are particularly far apart for values of RH greater than 98%. However, bespoke calibration of the MEMS sensing system using saturated solutions of known RH, reduces the measurement difference to an average of 1.97% RH, greatly increasing the accuracy for RH values close to 100%.

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Wearable MEMS Sensor Nodes for Animal Health Monitoring System

10.1007/978-3-030-79749-2_11 ◽

2021 ◽

pp. 283-305

Author(s):

Hirofumi Nogami ◽

Hironao Okada ◽

Seiichi Takamatsu ◽

Narifumi Kawano ◽

Takeshi Kobayashi ◽

...

Keyword(s):

Monitoring System ◽

Health Monitoring ◽

Animal Health ◽

Sensor Nodes ◽

Health Monitoring System ◽

Mems Sensor

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Monitoring des Arzneimittelmissbrauchs 2006 bei Klienten von Suchtberatungsstellen (PHAR-MON)

SUCHT - Zeitschrift für Wissenschaft und Praxis / Journal of Addiction Research and Practice ◽

10.1024/2007.07.05 ◽

2007 ◽

Vol 53 (7) ◽

pp. 65-77 ◽

Cited By ~ 1

Author(s):

Susanne Roesner ◽

Heinrich Küfner

Keyword(s):

Monitoring System

Hintergrund und Zielsetzung: PHAR-MON ist ein Monitoring-System, das die auf dem deutschen Markt befindlichen Arzneimittel in ihrer Bedeutung für die Entwicklung von Missbrauch und Abhängigkeit in Suchtberatungsstellen überwacht. Methodik: Klienten ambulanter Beratungsstellen werden im Rahmen der Standarddokumentation zu ihrem Arzneimittelkonsum befragt und Fälle eines abhängigen Konsums, eines schädlichen Gebrauchs oder eines Missbrauchs in PHAR-MON dokumentiert. Ergebnisse: Im Jahr 2006 wurden insgesamt 448 Meldungen von 276 überwiegend alkohol- und drogenabhängigen Klienten in das Monitoring einbezogen. Tranquilizer vom Benzodiazepin-Typ wurden in allen Klientengruppen mit Anteilen zwischen 29,1 % und 35,3 % am häufigsten dokumentiert. An benzodiazepinabhängige Klienten werden zunehmend auch Nicht-Benzodiazepin-Hypnotika verordnet. Bei opioidabhängigen Klienten war im Zeitraum der letzten fünf Jahre ein Anstieg im missbräuchlichen Substitutionsmittelkonsum von 14,9 % auf 33,8 % zu verzeichnen. Schlussfolgerungen: Das Risiko gefährlicher Wechselwirkungen zwischen Arzneimitteln mit Alkohol und Drogen sollte stärker als bisher in die ärztliche Verordnungsentscheidung einbezogen werden.

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