矿井煤尘粒度和浓度实时在线检测系统实验研究  

Experimental Study on Mine Coal Dust Particle Size and Concentration Real-time Online Monitoring System

作　　者：魏明生[1,2] 童敏明[1] 梁良[1] 王华睿[2] 

机构地区：[1]中国矿业大学信息与电气工程学院,江苏徐州221008 [2]江苏师范大学物理与电子工程学院,江苏徐州221116

出　　处：《煤矿安全》2016年第5期30-33,共4页Safety in Coal Mines

基　　金：国家科技支撑计划资助项目(2013BAK06B00);国家自然科学基金资助项目(51206070)

摘　　要：为了实现矿井煤尘爆炸的预报和预警,以光电二极管为光源,采用窄光束透射技术设计了一基于消光统计法煤尘粒度和浓度的实时在线检测系统。建立了消光统计法的煤尘测试模型,推导了消光统计法的测试方程,并设计了测试系统的实验装置和信号采集电路。最后分别采用0.05、0.24、0.72、1 mm 4种直径厚度光束分别进行了煤尘测量实验。实验结果表明,选择240μm厚度光束测量粒径的标准差为7.6%,可以满足对煤尘颗粒浓度和粒度的实时在线检测,验证了该系统的实用性和可行性。In order to achieve prediction and warning of mine coal-dust explosion,taking photodiode as light source,we designed an on-line test system for coal-dust particle size and concentration by narrow beam of light transmission technology based on extinction statistical method. We established coal dust testing model by extinction statistical method,deduced the test equation of extinction statistical method,and designed experimental apparatus and signal acquisition circuit for the testing system. We carried out coal dust measurement experiment for 0. 05 mm,0. 24 mm,0. 72 mm and 1 mm four kinds of thickness of the beam diameter. Experimental results show that the standard deviation is 7. 6% when the thickness of beam measurement particle size chooses 240 um and the designed measurement system can meet the monitoring requirement of mine coal dust,which verifies practicability and feasibility of the system.

关 键 词：矿井煤尘 消光统计法 煤尘粒度 煤尘浓度 在线检测 

分 类 号：TD76[矿业工程—矿井通风与安全]