| 基于收发分体声波换能器的二维温度场重建 |
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| 引用本文： | 沈雪华,熊庆宇,石欣,贾睿玺,徐光宇.基于收发分体声波换能器的二维温度场重建[J].仪器仪表学报,2015,36(8):1715-1723. |
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| 作者姓名： | 沈雪华 熊庆宇 石欣 贾睿玺 徐光宇 |
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| 作者单位： | 1 重庆大学自动化学院重庆400044；2 重庆大学软件学院重庆400044 |
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| 基金项目： | 国家计划973计划项目 (2013CB328903)、国家自然科学基金(61473050)项目资助 |
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| 摘 要： | 基于声学测温原理,运用发射端和接收端之间的声波信号飞行时间进行温度场重建,是工业应用领域中燃烧或加热处理过程温度测量的研究热点。本文采用收发分体声波换能器,确定其合理安装方式,运用Markov径向基拟合待测区域的声速分布,通过声速矩阵的奇异值分解,反演计算出温度场。仿真实验中设计了复杂程度不同的4种模型温度场,并考虑声波飞行时间在不同水平下的测量误差对重建结果的影响;实际测试中验证了本文方法在室温无加热、单峰对称、单峰偏斜的温度分布下的重建效果。实验结果表明,本文提出的收发分体声波换能器安装方式结合基于Markov径向基拟合的重建算法,在温度场重建中具有较高的精度和较强的抗干扰性。
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| 关 键 词： | 温度场 声学测温 声波换能器 重建算法 Markov径向基 |
Two dimensional temperature field reconstruction
based on split type acoustic transducers |
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| Shen Xuehu,Xiong Qingyu,Shi Xin,Jia Ruixi,Xu Guangyu.Two dimensional temperature field reconstruction
based on split type acoustic transducers[J].Chinese Journal of Scientific Instrument,2015,36(8):1715-1723. |
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| Authors: | Shen Xuehu Xiong Qingyu Shi Xin Jia Ruixi Xu Guangyu |
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| Abstract: | Based on acoustic temperature measurement principle, using the time of flight of acoustic wave signal between transmitting end and receiving end to conduct temperature field reconstruction is a research hot spot of temperature measurement in combustion or heat treatment in industry application fields. This paper adopts split type acoustic transducers, reasonably determines their installation method, then uses Markov radial basis to fit the acoustic velocity distribution of the area to be measured, and finally reconstructs the temperature field with the singular value decomposition of the acoustic velocity matrix. In simulation experiments, four model temperature fields with different complexity were designed to verify the reconstruction performance while considering the influence of measurement error on reconstruction result under different levels of the time of flight. In actual test, the reconstruction effect of the proposed method was investigated under normal room temperature no heating condition, one peak symmetrical temperature distribution, and one peak asymmetrical temperature distribution, respectively. All experiment results demonstrate that, the proposed installation method of split type acoustic transducers combining with the reconstruction algorithm based on Markov radial basis fitting achieves high accuracy and strong anti interference ability in temperature field reconstruction. |
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| Keywords: | temperature field acoustic temperature measurement acoustic transducer reconstruction algorithm Markov radial basis |
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