一种高温在线复介电系数测量系统设计

Design of an On-line High Temperature Dielectric Property Measurement System

文章设计实现了一套基于脊波导的频率为2450 MHz的在线高温介电系数测量系统。该系统利用FDTD仿真(时域有限差分)与神经网络算法结合反演得到物质的复介电系数。为方便使用,系统还配套了数据采集卡进行测量过程中数据的采集,并编写了人机交互界面,以实现自动测量。文章利用室温下常见物质对该系统进行了的可靠性验证,并对红土矿进行了变温测量。

In this paper,an on-line high temperature dielectric property measurement system based on a ridge waveguide is proposed under the frequency of 2450 MHz.The FDTD simulation（finite differencetime-domain）and neural network algorithm are combined to reverse the complex permittivity of the material.For using convenience,a data acquisition deviceis adopted to collect data during measurement process,and a man-machine interaction interface is programmed to achieve auto measurement.The reliability of this system is verified by some common materials at room temperature,and the system is used to measure the dielectric property of laterite ores under dynamic temperatures.