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首页> 外文会议>7th Biennial Conference on Engineering Systems Design and Analysis 2004(ESDA 2004) vol.1: Advanced Energy Systems; Advanced Heat Transfer in Engineering Systems; ... >INVESTIGATION OF HETEROGENEOUS MIXTURES WITH DUAL-MODALITY TRANSDUCERS FABRICATED USING THICK-FILM TECHNOLOGY
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INVESTIGATION OF HETEROGENEOUS MIXTURES WITH DUAL-MODALITY TRANSDUCERS FABRICATED USING THICK-FILM TECHNOLOGY

机译：使用厚膜技术制造的具有双模态传感器的异质混合物的研究

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The work presented in this paper focuses on development of a dual modality sensor, for deployment within an oil and gas extraction plant to measure the composition of oil-water mixtures. The sensors combine ultrasonic and electrical measurement techniques. These are of course non-destructive, rapid, and can potentially provide an on-line industrial measurement. In addition, the combination of two techniques could potentially be reliable in a wider range of process conditions and could contain self-calibration features. The sensors used in the current study were manufactured using thick-film technology, which enables construction of multi-layered structures of both conductive and non-conductive layers, some of which may exhibit piezoelectric properties for ultrasonic measurement purposes. These are later fired on a ceramic substrate to provide rugged sensors, capable of working in aggressive industrial environments. Experiments were conducted for mixtures of vegetable oil and saline water to investigate the feasibility of such dual dual-modality sensors. The time of flight of ultrasonic wave in pure liquids and heterogeneous mixtures was measured. It has been shown that the signal obtained from the transducers is sufficiently strong to warrant the measurement of the speed of sound in heterogeneous mixtures of oil and water. A study of the effects of oil concentration and temperature on the speed of sound has been conducted. A mathematical model has been tested, which relates the speed of sound to the volume fraction taking into account the reflection and refraction on the droplet interfaces. The experimental results subjected to linear regression agree very well with the theoretical predictions. The electrical measurement was conducted at three different frequencies. In general, the values of capacitance and conductance decrease with increasing oil percentage. In the middle oil percentages a discontinuity occurs in the decreasing trend. In the high oil percentages, the experimental results agree very well with theoretical predictions.
机译：本文介绍的工作重点在于开发双模式传感器，该传感器可在油气提取厂内部署以测量油水混合物的组成。传感器结合了超声波和电气测量技术。这些当然是非破坏性的，快速的，并且可以潜在地提供在线工业测量。另外，两种技术的组合在更广泛的过程条件下可能具有可靠性，并且可能包含自校准功能。当前研究中使用的传感器是使用厚膜技术制造的，该技术能够构造导电层和非导电层的多层结构，其中某些层可能具有压电性质，可用于超声测量。随后将它们在陶瓷基板上烧制，以提供坚固的传感器，能够在恶劣的工业环境中工作。针对植物油和盐水的混合物进行了实验，以研究这种双重双模式传感器的可行性。测量了超声波在纯液体和非均匀混合物中的传播时间。已经表明，从换能器获得的信号足够强，足以保证对油和水的非均质混合物中的声速进行测量。已经研究了油浓度和温度对声速的影响。已经测试了数学模型，该模型考虑了液滴界面上的反射和折射，将声音的速度与体积分数相关。进行线性回归的实验结果与理论预测非常吻合。电测量是在三个不同的频率上进行的。通常，电容和电导率的值随着油百分比的增加而降低。在中油百分比中，下降趋势不连续。在高油百分比下，实验结果与理论预测非常吻合。

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