Liquid level sensor using ultrasonic Lamb waves

Sakharov, V.E.; Кузнецов, С. А.; Зайцев, Б. Д.; Kuznetsova, I. E.; Joshi, S.G.

doi:10.1016/s0041-624x(02)00459-6

Cited by 75 publications

(40 citation statements)

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“…For power plants, the frequently used water level measurement methods include the differential pressure gauge [15], ultrasonic level meter [16,17], and radar level gauge [18]. For the differential pressure gauge, the water level is determined from the static pressure change induced by the water level change.…”

Section: Introductionmentioning

confidence: 99%

Water Level Sensing in a Steel Vessel Using A₀ and Quasi-Scholte Waves

et al. 2017

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This paper presents a water level sensing method using guided waves of A 0 and quasi-Scholte modes. Theoretical, numerical, and experimental studies are performed to investigate the properties of both the A 0 and quasi-Scholte modes. The comparative study of dispersion curves reveals that the plate with one side in water supports a quasi-Scholte mode besides Lamb modes. In addition, group velocities of A 0 and quasi-Scholte modes are different. It is also found that the low-frequency A 0 mode propagating in a free plate can convert to the quasi-Scholte mode when the plate has one side in water. Based on the velocity difference and mode conversion, a water level sensing method is developed. For the proof of concept, a laboratory experiment using a pitchcatch configuration with two piezoelectric transducers is designed for sensing water level in a steel vessel. The experimental results show that the travelling time between the two transducers linearly increases with the increase of water level and agree well with the theoretical predictions.

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Section: Introductionmentioning

confidence: 99%

Water Level Sensing in a Steel Vessel Using A₀ and Quasi-Scholte Waves

et al. 2017

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“…At present, there are varieties of designs including the simple dipstick and kinds of liquid level sensors with complex structures such as capacitive type [1,2], acoustic wave [3][4][5], and optical fiber based on different principles. But there are still prominent contradictions between the existing level measurement technologies and the market demands.…”

Section: Introductionmentioning

confidence: 99%

Liquid level sensor based on CMFTIR effect in polymer optical fiber

et al. 2016

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Abstract:The macro-bending induced optical fiber cladding modes frustrated total internal reflection effect is used to realize the liquid level probe with a simple structure of single macro-bend polymer optical fiber loop. The test results show that the extinction ratio reaches 1.06 dB. "First bath" phenomenon is not obvious (about 0.8%). The robustness of the sensor is better, and the ability of anti-pollution is stronger compared with the conventional sensors. The process of making this sensing probe is extremely easy, and the cost is very low.

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“…They concluded that the optimum separator performance took place at a water level in the middle of the experimental range. A novel, non-invasive method for measuring the liquid level in a closed metal under high pressure based on ultrasonic lamb wave propagation along the tank walls has been reported by Sakharov et al [6]. They did not provide any information on the potential application of their novel technique in measuring the oil/water interface level.…”

Section: Introductionmentioning

confidence: 99%

Estimation of gas/liquid and oil/water interface levels in an oil/water/gas separator based on pressure measurements and regression modelling

Arvoh

Skeie

Halstensen

2013

Separation and Purification Technology

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Gravity separators are widely used for separation of gas/oil/water/sand from both offshore and onshore oil production facilities. Estimation of the gas/liquid and oil/water interface levels in gravity separators have been a concern since these parameters are important for reliable operation. Most of the instruments on the market today do not provide reliable measurements of both gas/liquid and oil/water interface levels. The few instruments that do provide reliable measurements are however based on radioactive principles. Nevertheless these radioactive instruments possess a strong health, safety and environmental risk. An alternative inexpensive, environmentally friendly, accurate and cost effective way for gas/liquid and oil/water interface level estimation based on pressure measurement is presented. The root mean squared error of prediction (RMSEP) for gas/liquid and oil/water interface level estimation from traversing a pressure sensor based on partial least square regression (PLS-R) were 14.5 mm and 17.7 mm respectively. A comparison of results from models based on PLS-R and ordinary least square regression (OLS-R) techniques proved that the RMSEP from the PLS-R technique was better in estimating the oil/water interface level but in the case of gas/liquid interface level estimation the OLS-R technique was slightly better. It was concluded that the PLS-R technique provided a better overall result and is recommended  Corresponding author: e-mail: benjamin.k.arvoh@hit.no, Tel: +47 35575134, Telefax: +47 35575001 3 when pressure measurements in combination with multivariate data analysis is applied for gas/liquid and oil/water interface level estimations in gravity separators.

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Liquid level sensor using ultrasonic Lamb waves

Cited by 75 publications

References 1 publication

Water Level Sensing in a Steel Vessel Using A₀ and Quasi-Scholte Waves

Water Level Sensing in a Steel Vessel Using A₀ and Quasi-Scholte Waves

Liquid level sensor based on CMFTIR effect in polymer optical fiber

Estimation of gas/liquid and oil/water interface levels in an oil/water/gas separator based on pressure measurements and regression modelling

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Liquid level sensor using ultrasonic Lamb waves

Cited by 75 publications

References 1 publication

Water Level Sensing in a Steel Vessel Using A0 and Quasi-Scholte Waves

Water Level Sensing in a Steel Vessel Using A0 and Quasi-Scholte Waves

Liquid level sensor based on CMFTIR effect in polymer optical fiber

Estimation of gas/liquid and oil/water interface levels in an oil/water/gas separator based on pressure measurements and regression modelling

Contact Info

Product

Resources

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Water Level Sensing in a Steel Vessel Using A₀ and Quasi-Scholte Waves

Water Level Sensing in a Steel Vessel Using A₀ and Quasi-Scholte Waves