光学皮带秤测量方法及实验对比
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摘要
基于激光测距技术,提出一种新型皮带输送物料的体积测量方法,该方法利用激光测距传感器拟合得到物料横截面,并结合皮带速度计算得到物料瞬时流量.通过皮带上物料的运动特征分析主要误差源,并优化轮廓提取算法;通过搭建实验台(带宽为200mm的皮带机),测量在带速为0~0.8m·s-1时的物料流量.实验结果表明:误差补偿之后,测量结果的重复性和准确性的误差均在±1%以内,该方法具有非接触、结构简单、精度高等优点,可以满足工业带式输送机的实时测量要求.
Based on laser ranging technology,a new method for measuring the material volume on belt conveyors was proposed.A the method uses laser ranging sensor was used to measure and fit the cross section of material and the instantaneous flow rate of material was calculated together with belt speed.According to the movement characteristics of the material on the belt,the main error sources were analyzed and the contour extraction algorithm was optimized.An experimental platform with a bandwidth of 200 mm was set up to measure the material flow rate when the belt conveyer moved at a speed in the range of 0~0.8 m·s-1.The experimental results show that:the repeatability error and accuracy error of measurement results are within ±1%after error compensation.This method has the advantages of non-contact measurement,simple structure and high precision,and can meet the real-time measurement requirements of industrial belt conveyor.
Based on laser ranging technology,a new method for measuring the material volume on belt conveyors was proposed.A the method uses laser ranging sensor was used to measure and fit the cross section of material and the instantaneous flow rate of material was calculated together with belt speed.According to the movement characteristics of the material on the belt,the main error sources were analyzed and the contour extraction algorithm was optimized.An experimental platform with a bandwidth of 200 mm was set up to measure the material flow rate when the belt conveyer moved at a speed in the range of 0~0.8 m·s-1.The experimental results show that:the repeatability error and accuracy error of measurement results are within ±1%after error compensation.This method has the advantages of non-contact measurement,simple structure and high precision,and can meet the real-time measurement requirements of industrial belt conveyor.
引文
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[3] ANDERSSON T,THURLEY M J,CARLSON J E.A machine vision system for estimation of size distributions by weight of limestone particles[J].Minerals Engineering,2012,25(1):38-46.DOI:10.1016/j.mineng.2011.10.001.
[4] ROMASHKO R V,EFIMOV T A,KULCHIN Y N.Laser adaptive holographic system for microweighing of nanoobjects[J].Quantum Electronics,2014,44(3):269-273.DOI:10.1070/QE2014v044n03ABEH015348.
[5]梁漫春,衣宏昌,张志康.一种新的在线称重方法[J].核电子学与探测技术,2006,26(4):443-445.DOI:10.3969/j.issn.0258-0934.2006.04.014.
[6]张小虎,欧建良,苑云,等.投影轮廓线辅助下的堆场三维形貌摄影测量研究[J].光学学报,2011,31(6):92-99.DOI:10.3788/aos201131.0612002.
[7]李璐璐,赵文川,伍凡,等.摄像机标定中的特征点提取算法研究与改进[J].光学学报,2014,34(5):171-178.DOI:10.3788/aos201434.0515002.
[8]郑明杰,刘鑫.激光测距技术国内外发展状况及原理[J].科技创新导报,2014(1):35.DOI:10.16660/j.cnki.1674-098x.2014.01.003.
[9]邵海燕,张振海,李科杰,等.用于远距离检测的线结构光传感器特性分析[J].激光杂志,2015(2):75-77.DOI:10.14016/j.cnki.jgzz.2015.02.075.
[10]常方强,孟希,罗才松.激光测距仪在海崖剖面形态快速测量中的应用[J].华侨大学学报(自然科学版),2015,36(2):215-220.DOI:10.11830/ISSN.1000-5013.2015.02.0215.
[11]何原荣,潘火平,陈鉴知,等.宋代古船的三维激光扫描技术重建与模型3D打印[J].华侨大学学报(自然科学版),2017,38(2):245-250.DOI:10.11830/ISSN.1000-5013.201702021.
[12]王晓嘉,高隽,王磊.激光三角法综述[J].仪器仪表学报,2004,25(增刊3):601-604.DOI:10.3321/j.issn:0254-3087.2004.z3.185.
[13] ZENG Fei,WU Qing,DAI Chaolei.Speed control simulation system of bulk terminal conveyor belts[C]∥International Conference on Transportation Information and Safety.Wuhan:ASCE,2013:2062-2069.DOI:10.1061/9780784413036.277.
[14]陈岩,陈开胜.皮带传动系统动态特性研究[J].机械传动,2014(7):46-50.DOI:10.16578/j.issn.1004.2539.2014.07.014.
[15] CONTE D,FOGGIA P,PERCANNELLA G,et al.An experimental evaluation of foreground detection algorithms in real scenes[J].Eurasip Journal on Advances in Signal Processing,2010(1):373-384.DOI:10.1155/2010/373941.
[16] MONNET A,MITTAL A,PARAGIOS N,et al.Background modeling and subtraction of dynamic scenes[C]∥IEEE International Conference on Computer Vision.Nice:IEEE Press,2003:1305-1312.DOI:10.1109/iccv.2003.123 8641.