基于激光测距矿用带式输送机多参数检测方法研究

Research on multi-parameters detection method of mine belt conveyor based on laser ranging

为解决煤矿运煤带式输送机"逆煤流启动,顺煤流停止"控制方式下,运输系统存在的启动时间长、空转耗电量大、设备磨损严重、运输效率低下的问题,满足矿用带式输送机运输系统"顺煤流启动、顺煤流停止"控制方式与矿用带式输送机"运力平衡"控制方式对矿用带式输送机输送带上煤量检测可靠性的需求,全面分析了现有矿用带式输送机5种常用的煤流量检测方法(电子皮带秤法、核子秤法、激光秤法、超声波测距法、视频图像分析法)的特性与不足。提出了基于激光测距非接触测量的矿用带式输送机载荷分布状态的实时检测方法,分析了影响载荷分布状态测量精度和实时性的因素,并提出了解决方案,实现了矿用带式输送机输送带载荷分布状态的整体测量;提出了输送带跑偏的判定方法和输送带跑偏量的计算方法,实现了输送带跑偏判断及跑偏量测量;提出了基于激光测距矿用带式输送机多参数检测仪的设计方案。在此基础上,提出了矿用带式输送机载荷分布状态的校验方法:用机头多参数检测仪测量的结果与机尾多参数检测仪测出的同位置测量值进行校验;提出了"顺煤流启动、顺煤流停止"系统的控制策略:依据输送带上载荷的整体分布状态,顺煤流方向控制带式输送机的启/停和速度调整,让带式输送机接近额定载荷运行;提出了矿用带式输送机"运力平衡"系统的控制策略:调节分支矿用带式输送机的煤流量,接近主矿用带式输送机的额定流量,提高运输系统的有效运力。该方案可简化矿用带式输送机控制系统传感器的配置种类和数量,提高了控制系统的集成度与可靠性,降低了系统成本和维护工作量,为矿用带式输送机系统"顺煤流启动、顺煤流停止"与矿用带式输送机"运力平衡"系统的实施提供了一种性能可靠的煤量检测方案。

In order to solve the problems of long start-up time,large idling power consumption,serious equipment wear and tear and low transportation efficiency of coal mine belt conveyor under the control mode of"starting against coal flow and stopping along coal flow",and it meets the requirements of the mine and the demand of the reliability of coal quantity detection of mining belt conveyors under the control mode of"starting and stopping along coal flow"of the belt conveyor transportation system and the"balance of transport capacity"of control method of the mining belt conveyor.A comprehensive analysis of the characteristics and deficiencies of the five commonly used coal flow detection methods(electronic conveyor belt scale method,nuclear scale method,laser scale method,ultrasonic distance measurement method,video image analysis method)of existing mine belt conveyors.A real-time detection method of the load distribution state of mine belt conveyor based on non-contact measurement and laser ranging was put forward.The factors affecting the accuracy and real-time performance of load distribution state were analyzed and solutions were proposed to achieve the overall measurement of the load distribution status of the mine belt conveyor.The judgment and the calculation methods of belt deviation were proposed and realized.A design scheme of multi-parameter detector for mine belt conveyor based on laser ranging was proposed.On the basis of above all,a method for verifying the load distribution status of mine belt conveyor was put forward.The results measured by the multi-parameter detector of the head and the measured values at the same position measured by the multi-parameter detector of the tail were verified;The control strategy of"starting and stopping along coal flow"system was proposed.According to the overall distribution of the load on the conveyor belt,the start/stop and speed adjustment of the belt conveyor were controlled along the direction of the coal flow,so that the belt conveyor was operated near the rated load.The control strategy of"capacity balance"system of mine belt conveyor was proposed,adjusting the coal flow rate of the branch mine belt conveyor and approaching the rated flow rate of main mine belt conveyor to improve the effective transport capacity of transportation system.The scheme can simplify the type and quantity of sensors used in the control system of mine belt conveyor,improve the integration and reliability,optimize the configuration of sensors,reduce the system cost and maintenance workload,and provide a reliable coal quantity detection scheme for"starting and stopping along coal flow"and"carrying capacity balance"of mine belt conveyor system.