| 彭小兰,刘志强,黄霄.传感器在炉管泄漏检测互相关算法中的影响[J].声学技术,2019,38(6):705~709 |
| 传感器在炉管泄漏检测互相关算法中的影响 |
| The influence of sensors on the cross-correlation algorithm for furnace tube leak detection |
| 投稿时间：2018-04-28 修订日期：2018-09-09 |
| DOI：10.16300/j.cnki.1000-3630.2019.06.018 |
| 中文关键词: 泄漏 互相关算法 时延值 传感器 相位差 |
| 英文关键词: leakage cross-correlation algorithm time delay value sensor phase difference |
| 基金项目:质检公益性行业专项项目（201510067）、国家自然科学基金（51376198）资助 |
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| 中文摘要: |
| 将互相关算法应用于炉管泄漏定位中，搭建了一套基于时延测量的炉管泄漏检测系统。时延值是通过传感器相位差计算出来的，传感器的初始相位差以及节点位置都会影响检测结果。实验结果表明：（1）基于互相关算法的锅炉管泄漏定位系统中的4个传感器的初始相位需要进行一致性匹配；（2）对子脉冲信号，时延测量不受传感器之间距离的影响；但是对周期性信号，只有在传感器间距对应的时延小于半周期时，互相关算法才能准确计算出时延值；（3）传感器尺寸小于50 mm时，采用互相关算法测量时延才准确。 |
| 英文摘要: |
| The cross-correlation algorithm is applied to locating furnace tube leak, and a set of time delay measurement based furnace tube leak detection system is built. The time delay value is calculated by the phase difference. The initial phase difference and the placed position of the sensor will affect the detection result. Experiments show that:1.the initial phase differences of the four sensors in the cross correlation algorithm based tube leak location system require consistency matching; 2.for impulse signal, the time delay measurement is independent of the sensor spacing, however, for periodic signal, only if the time delay corresponding to the sensor spacing is within half a period, the cross-correlation algorithm can accurately calculate the time delay value; 3.only when the sensor size is less than 50mm, the time delay measurement by cross-correlation algorithm is accurate. |
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