| 将匹配原理用于超声波测气体流速 |
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| 引用本文： | 李小京,王萍,卢景山. 将匹配原理用于超声波测气体流速[J]. 传感器与微系统, 2006, 25(9): 66-68 |
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| 作者姓名： | 李小京 王萍 卢景山 |
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| 作者单位： | 天津工业大学,计算中心,天津,300160 |
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| 摘 要： | 声波在传播时,其波峰序列中各波峰值在不同流速、压力、温度和湿度下是不一样的,必须确定一个固定波峰才能精确测量时差。介绍了一种采用波峰特征匹配原理确定波形的确切位置,进而求出时间差的方法。它的特点是计算量小、抗管道振动性能好,当气体流速小于30m/s时,具有较高的测量精度。
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| 关 键 词： | 气体 流速测量 超声波 匹配方法 |
| 文章编号： | 1000-9787（2006）09-0066-03 |
| 收稿时间： | 2006-03-22 |
| 修稿时间： | 2006-03-22 |
Ultrasonic gas flow measurement based on matching principle |
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| LI Xiao-jing,WANG Ping,LU Jing-shan. Ultrasonic gas flow measurement based on matching principle[J]. Transducer and Microsystem Technology, 2006, 25(9): 66-68 |
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| Authors: | LI Xiao-jing WANG Ping LU Jing-shan |
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| Affiliation: | Computation Center, Tianjin Polytechnic University, Tianjin 300160, China |
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| Abstract: | When sound wave transmits in different flow velocity, pressure, temperature and humidity, the magnitude of wave peak is not same, A fixed wave peak is must determined to measure exactly difference time, A method that determines exact location of wave peak is introduced based a wave peak match principle to find difference time. The method has less calculation and resistance to vibration, and also it has high measuring accuracy while gas flow is less than 30 m/s. |
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| Keywords: | gas flow velocity measurement ultrasonic match method |
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