| 超声液位检测频率选择的理论计算和实验研究 |
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| 引用本文： | 张峰,贺西平,李斌.超声液位检测频率选择的理论计算和实验研究[J].应用声学,2009,28(2):129-133. |
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| 作者姓名： | 张峰 贺西平 李斌 |
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| 作者单位： | 1. 陕西省物理研究所陕西师范大学应用声学研究所,西安,710062
2. 西北工业大学航海工程学院,西安,710072 |
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| 基金项目： | 陕西省教育厅科研基金 |
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| 摘 要： | 非介入式超声液位检测中,中间层介质对反射回波强度有着显著的影响,为得到较强的检测回波信号,发射频率的选择是非常必要的。本文采用传输矩阵方法,对非介入式超声液位检测中声波在多层介质中的传播进行了研究,给出了反射回波声强与入射声波频率之间的关系,从理论上计算得到了最佳入射声波频率。实验结果与理论计算一致,由此为非介入式超声液位检测的频率选择提供了一有效的技术途径。
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| 关 键 词： | 传输矩阵 超声液位检测 回波信号 频率选择 |
Theoretical calculation and experimental study for the optimum frequency in ultrasonic liquid level determination |
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| ZHANG Feng,HE Xi-Ping and LI Bin.Theoretical calculation and experimental study for the optimum frequency in ultrasonic liquid level determination[J].Applied Acoustics,2009,28(2):129-133. |
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| Authors: | ZHANG Feng HE Xi-Ping and LI Bin |
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| Institution: | 1 Institute of Applied Acoustics,Shaanxi Normal University,Xi’an 710062) (2 College of Marine Engineering,Northwestern Polytechnical University,Xi’an 710072) |
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| Abstract: | The reflected echo intensity is obviously influenced by both the frequency and the interlayer medium in the non-intrusive ultrasonic liquid level detection.In order to obtain an noticeable echo signal,the selection of incident ultrasonic frequency is indispensable. By the use of the transfer matrix,the transmission of ultrasonic wave through multilayer medium is investigated,and the relationship between the reflected echo intensity and the incident ultrasonic frequency is also obtained.The optimum frequency for the ultrasonic incidence wave is calculated,and the result is validated by an experiments.In this paper, for the problem of the frequenciy selection of the incident ultrasonic wave,an effective technical approach is provided. |
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| Keywords: | Transfer matrix Ultrasonic liquid level determination Echo signal Frequency selection |
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