一种矿井通风中精确测定风速的方法  

A method of precise measurement of air speed in mine ventilation

作　　者：萨贤春[1] 曹娟[1] 王宁[1] 

机构地区：[1]西安科技大学测绘科学与技术学院,陕西西安710054

出　　处：《工矿自动化》2014年第7期99-103,共5页Journal Of Mine Automation

摘　　要：针对超声波传感器接收超声波脉冲信号时由于存在起振过程,导致脉冲到达接收传感器的时间难以精确测定的问题,提出一种矿井通风中精确测定风速的方法,即通过拟合接收传感器接收到的正弦信号曲线及其包络线,计算出超声波脉冲信号到达传感器的时刻。对模拟采样数据的计算及分析结果表明,该方法能够达到较高的测时精度,从而能够保证矿井巷道测风精度。In view of problem that it is hard to precisely measure time of pulse arriving at receiving sensor due to presence of start-up process when ultrasonic sensor receives ultrasonic pulse signal, the paper proposed a method of precise measurement of air speed in mine ventilation. The method fits the curve and envelope curve of sinusoidal signals received by receiving sensor, and calculates time of the ultrasonic pulse signal arriving at the sensor. The results of calculation and analysis of simulate sampling data show that the method can achieve high measuring precision, which can improve measurement accuracy of mine tunnel air speed.

关 键 词：矿井通风 时差法 风速测量 曲线拟合 

分 类 号：TD635[矿业工程—矿山机电]