Acoustic Measurement of Temperature Distribution in a Room Using a Small Number of Transducers
Acoustic Measurement of Temperature Distribution in a Room Using a Small Number of Transducers
复制标题
使用少量传感器对房间内温度分布进行声学测量
DOI：
10.1143/jjap.38.3131
复制
发表时间：
1999
影响因子：
1.5
通讯作者：
Ken'ichi Harakawa Ken'ichi Harakawa
中科院分区：
文献类型：
--
作者：
Koichi Mizutani Funakoshi;Keinosuke Nagai Keinosuke Nagai;Ken'ichi Harakawa Ken'ichi Harakawa
提出了一种利用少量声换能器非接触测量室温分布的方法。声音传播速度取决于空气温度，并且它是从声音的飞行时间获得的。使用由一对换能器组成的声学延迟线获得平行于声探头的平均温度。测量对象是一个大小为4，000 mm（D）× 4，200 mm（W）的房间，分为3×3网格，具有9个单元格。通过安排声音传播路径的特定几何性质，我们可以将温度分布的表达式公式化为声速的矩阵函数。十二个传感器与四个壁接触安装。我们用电热源在整个房间里创造一个温度梯度。室内温度分布的实验重建结果与从热源温度分布估计的分布一致。与传统的温度测量系统相比，该技术具有非接触式传感、响应时间快、室温分布计算简单等优点。
We propose a method for noncontact measurement of room temperature distribution using a small number of acoustic transducers. The sound propagation velocity is dependent on the air temperature, and it is acquired from the time of flight of sound. The mean temperature parallel to the sound probe is acquired using an acoustic delay line consisting of a pair of transducers. The measured object is a room of size 4,000 mm (D)× 4,200 mm (W) partitioned into a 3×3 grid, with 9 unit cells. By arranging a certain geometrical property of the sound propagation path, we can formulate an expression for the temperature distribution as a matrix function of the sound velocity. Twelve transducers are installed in contact with the four walls. We create a temperature gradient throughout the room using an electrical heat source. Experimental reconstruction results of the room temperature distribution were in agreement with the distributions estimated from the temperature profiles of the heat sources. This technique has the advantages of noncontact sensing, quicker response time and simpler calculation of room temperature distribution, in comparison with conventional temperature measurement systems.