| 基于涡流传感器的非接触式金属板厚度测量系统 |
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| 引用本文： | 李文涛,刘志伟,王志春.基于涡流传感器的非接触式金属板厚度测量系统[J].科学技术与工程,2016,16(15). |
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| 作者姓名： | 李文涛 刘志伟 王志春 |
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| 作者单位： | 内蒙古科技大学信息工程学院,内蒙古科技大学信息工程学院,内蒙古科技大学信息工程学院 |
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| 基金项目： | 国家自然科学基金(61463041)连铸凝固坯壳厚度电涡流在线检测方法研究,;国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 摘 要： | 利用涡流无损检测方法对金属板材进行厚度测量时,由于电涡流传感器探头线圈的阻抗表达式过于复杂,金属板材的电导率、磁导率和厚度等因素对探头阻抗的影响难以通过探头线圈的阻抗变化进行观察。针对这一问题,介绍了一种基于涡流传感器的非接触式金属板厚测量系统。该系统利用PSD技术实现涡流阻抗信号的正交分解,采用STM32单片机对数据进行处理,最后进行人机操作、液晶显示和数据存储。整个系统具有较高的检测精度和灵敏度,能够在强噪声背景的干扰下实现阻抗信号的二维信息检测。
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| 关 键 词： | 涡流检测 正交分解 PSD 互相关检测 |
| 收稿时间： | 2016/1/15 0:00:00 |
| 修稿时间： | 2016/5/16 0:00:00 |
Non contact metal plate thickness measurement system based on eddy current sensor |
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| Affiliation: | School of Information Engineering,Inner Mongolia University of Science and Technology, |
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| Abstract: | Using nondestructive eddy current texting methods for thickness measurement of sheet metal, due to the sensor probe coil impedance expression, the impact of conductivity, permeability and thickness of sheet metal for the probe impedance is difficult to be observed through the change of probe coil impedance.In order to solve the problem,a non contact metal plate thickness measurement system based on eddy current sensor is introduced. The system realizes the orthogonal decomposition of eddy current impedance signals by the technology of PSD, and processes data by STM32 microcontroller, and the last operations are the man-machine operation, liquid crystal display and data storage process. The whole system has upper detection precision and sensitivity, and it is able to realize the two-dimensional information detection under the background of strong noise. |
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| Keywords: | eddy current testing orthogonal decomposition PSD cross-correlation detection |
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