面向三维球体空间温度场的对射式超声波测量研究

Study on an Opposite-Type Ultrasonic Measurement for Space Temperature Field in Three-Dimensional Sphere

温度测量在航空航天、公共安全、智能制造及智能家居等方面具有重要意义。基于超声波原理的测温技术是近年来发展起来的一种新型温度测量方式,超声波测温技术具有非接触式,温度测量范围广,响应速度快和测量准确度高等特点,在航空发动机、微波干燥等领域表现出了良好性能。该文面向三维球体空间温度场测量的需求背景,基于超声波飞行速度与介质温度相关原理,采用收发同体式超声波换能器,设计了针对二维圆形平面的8换能器结构和针对三维球体空间的26换能器结构,提出了分时轮训超声波换能器接收控制策略,建立了基于径向基函数的空间温度重构算法,并基于Matlab平台对测温方法进行仿真。仿真结果表明,对于构建的对角偏斜和中心对称二维圆形平面温度场模型,以及中心对称三维球体温度场模型均具有良好的重建效果,同时在超声飞行时间的测量中还叠加了标准差分别为0.02%、0.03%和0.05%的三类高斯白噪声,进一步验证了该文提出的对射式超声波温度场测量方法具有较好的鲁棒性。

The temperature measurement is of great significance in many aspects of the country and society such as aerospace,public security,intelligent manufacturing and smart home.The temperature measurement technology based on ultrasonic wave theory is a novel temperature measurement method in recent years.The ultrasonic temperature measurement technology has the characteristics of non-contact,wide temperature measurement range,fast response and high measurement accuracy,and has shown good performance in aero-engine,microwave drying and other fields.In this paper,facing the demand background of the space temperature field measurement of three-dimensional sphere,based on the principle of the relationship between ultrasonic flight speed and medium temperature,an 8-transducer structure for a two-dimensional circular plane and an 26-transducer structure for a three-dimensional sphere space are designed by using the transceiver integrated ultrasonic transducer.The receiving control strategy of time-sharing rotation training ultrasonic transducer is proposed,and the space temperature reconstruction algorithm based on radial basis function is established,and the temperature measurement method is simulated based on the Matlab platform.The simulation results show that the established two-dimensional circular plane temperature field model with diagonal deflection and central symmetry and the three-dimensional spherical temperature field model with central symmetry have good reconstruction effects.At the same time,three types of Gaussian white noise with standard deviations of 0.02%,0.03%and 0.05%respectively are superimposed in the ultrasonic time-of-flight measurement,which further verifies that the method proposed in this paper has good robustness.