Zigbee/Google Earth based assisted driving system in mining

The Assisted Driving System (ADS) for haul trucks operating in surface mining and construction sites is to reduce accidents related to low visibility conditions. This system is based on the GPS, Zigbee, and the Google-Earth engine as the graphic interface and mine-mapping server. The system has the capability to pin-point and track vehicles in real time using a 3D interface, which is based on user-based AutoCAD mine maps using the Google-Earth graphics interface. All equipped vehicles are shown in a 3D mine map stored in a local server through a wireless network. When low visibility conditions are present, the system indicates available exit/escape routes for driver safety. The ADS potentially increases reliability and reduces uncertainty in open pit mining operations.     

基于OpenGL的汽车起重机视景仿真关键技术

在OpenGL的环境下,建立汽车起重机模拟操作的视景仿真系统.利用3DSMAX建立起重机的机构模型,使用Java作为第三方软件将3D模型导入OpenGL中.采用天空半球的方法模拟3D天空,采用gllookat函数实现场景及操作室实时性良好的漫游,实现通过键盘和鼠标完成汽车起重机的变幅、起重臂伸缩、起升、回转、下降等模拟操作.     

基于混合平台的信息处理系统的研究与设计

目的研制用于光电对抗综合测量系统中的信息处理分系统,实现信息处理实时性与美观性的统一.方法设计与各设备通信采集所需的A/D接口卡和多功能采集卡,并根据任务选择相应的软件平台完成系统的数据采集和事后处理任务.结果仿真实验表明,系统中所设计的硬件设备和通信软件能够满足信息处理系统的技术指标,数据的处理结果均已得到用户方的认可.结论基于混合平台的信息处理系统有效地发挥两个平台的优点,可实现数据的实时处理和图表的综合评估.     

Development of a multi-layer perceptron artificial neural network model to determine haul trucks energy consumption

The mining industry annually consumes trillions of British thermal units of energy,a large part of which is saveable.Diesel fuel is a significant source of energy in surface mining operations and haul trucks are the major users of this energy source.Cross vehicle weight,truck velocity and total resistance have been recognised as the key parameters affecting the fuel consumption.In this paper,an artificial neural network model was developed to predict the fuel consumption of haul trucks in surface mines based on the gross vehicle weight,truck velocity and total resistance.The network was trained and tested using real data collected from a surface mining operation.The results indicate that the artificial neural network modelling can accurately predict haul truck fuel consumption based on the values of the haulage parameters considered in this study.     

Investigation of the optimum differential gear ratio for real driving cycles by experiment design and genetic algorithm

Experiment statistical method and genetic algorithms based optimization method are used to obtain the optimum differential gear ratio for heavy truck that provides best fuel consumption when changing the working condition that affects its torque and speed range. The aim of the study is to obtain the optimum differential gear ratio with fast and accurate optimization calculation without affecting drivability characteristics of the vehicle according to certain driving cycles that represent the new working conditions of the truck. The study is carried on a mining dump truck YT3621 with 9 forward shift manual transmission. Two loading conditions,no load and 40 t,and four on road real driving cycles have been discussed. The truck powertrain is modeled using GT-drive,and DOE-post processing tool of the GT-suite is used for DOE analysis and genetic algorithm optimization.     

基于VEGA PRIME激光制导导弹三维视景仿真设计

三维视景仿真依据仿真目的,可实时再现导弹攻击目标的全过程,为激光制导武器半实物仿真的飞行仿真、航迹规划等提供了直观的分析手段。通过Vega prime和Creator建立了导弹攻击目标的三维视景仿真系统中所需的三维实体模型、地形模型、天空、海面、雪地和碰撞等特殊效果并对其进行优化处理。依据导弹弹道解算模型实时解算导弹弹道参数,通过人机交互界面实时显示导弹飞行的位置和姿态,实现了导弹攻击目标的可视化仿真。     

220t矿用自卸汽车动力学研究

对220 t电动轮矿用自卸汽车进行整车结构设计,通过对实体结构简化处理得到整车实体模型.利用ANSYS软件建立整车满载工况的有限元模型,经模态计算得到整车的低阶固有频率,并对固有频率所表现出的主振型进行了分析.基于标准的频域路面功率谱密度函数,通过频/时变换得到时域路面随机位移函数,计算了路面随机位移时间函数激励下整车的动力响应,获取车架、前后桥、车厢、悬架等主要受力构件的位移随时间变化的规律.根据模态和动力响应分析结果针对具体研究车型的初设计提出了改进意见,指出了对主要受力构件进行疲劳分析的必要性.     

矿用电动轮汽车日常维修成本数学模型分析

以某大型露天矿山同年投入使用的7辆154t630E型矿用电动轮汽车为研究对象,详细介绍了电动轮汽车日常维修成本构成,提出了一种科学估算电动轮汽车日常维修成本的新方法,建立数学模型,分析维修成本的规律,以降低维修成本,从而为国内矿用电动轮汽车日常维修成本评估提供了重要依据．     

支持矿井工程图平台的研究与开发

分析了传统矿井生产技术经营决策模拟系统（SIMBERG）,讨论了该系统从为教学服务拓展为向矿井服务中所存在的问题,并针对这些问题并开发了一个平台,该平台能真实地描述矿井工程图,可以为矿井井巷设计、生产、管理服务,能方便地与矿井的经营管理数据库系统交互。该平台是SIMBERG走向矿井应用的基础,也是煤矿信息集成的基础。     

微电脑系统钟

微电脑系统钟是一种功能复杂的高精度石英电子钟，能系统地发送实时时间和相关信息，配置控制接口和若干子钟，构成网络性报时、时控系统。     

Development of a fault-rupture environment in 3D: A numerical tool for examining the mechanical impact of a fault on underground excavations

While faults are commonly simulated as a single planar or non-planar interface for a safety or stability analysis in underground mining excavation, the real 3D structure of a fault is often very complex, with different branches that reactivate at different times. Furthermore, these branches are zones of nonzero thickness where material continuously undergoes damage even during interseismic periods. In this study, the initiation and the initial evolution of a strike-slip fault was modeled using the FLAC3D software program. The initial and boundary conditions are simplified, and mimic the Riedel shear experiment and the constitutive model in the literature. The FLAC3D model successfully replicates and creates the 3D fault zone as a strike-slip type structure in the entire thickness of the model. The strike-slip fault structure and normal displacement result in the formation of valleys in the model. Three panels of a longwall excavation are virtually placed and excavated beneath a main valley. The characteristics of stored and dissipated energy associated with the panel excavations are examined and observed at different stages of shear strain in the fault to evaluate bump potential. Depending on the shear strain in the fault, the energy characteristics adjacent to the longwall panels present different degrees of bump potential, which is not possible to capture by conventional fault simulation using an interface.     

Availability-based simulation and optimization modeling framework for open-pit mine truck allocation under dynamic constraints

We present a novel system productivity simulation and optimization modeling framework in which equipment availability is a variable in the expected productivity function of the system. The framework is used for allocating trucks by route according to their operating performances in a truck–shovel system of an open-pit mine, so as to maximize the overall productivity of the fleet. We implement the framework in an originally designed and specifically developed simulator–optimizer software tool. We make an application on a real open-pit mine case study taking into account the stochasticity of the equipment behavior and environment. The total system production values obtained with and without considering the equipment reliability, availability and maintainability (RAM) characteristics are compared. We show that by taking into account the truck and shovel RAM aspects, we can maximize the total production of the system and obtain specific information on the production availability and productivity of its components.     

A comparison of strategic mine planning approaches for in-pit crushing and conveying,and truck/shovel systems

In a global environment where energy and labor are becoming increasingly expensive, continuous mining systems such as In-Pit Crushing and Conveying(IPCC) systems have been advanced as offering a real alternative to conventional truck haulage systems. The implementation of IPCC systems in hard rock operations in open pit mines however requires different and more comprehensive planning approaches in order to adequately reflect the practical aspects associated with these. This paper investigates the impact that these approaches may have on the implementation of IPCC systems on a basic metalliferous deposit amenable to open pit exploitation. A strategic life of mine plan to provide numerous economic indicators for each approach is analyzed and compared to traditional truck haulage systems. The mine planning and evaluation process highlights the increased overall resource recovery that may accompany the use of IPCC systems. This investigation also provides insights into the issues associated with IPCC and the scale and type of operation and orebody that is likely to provide a feasible alternative to truck haulage.     

具有真实感的常用机构实时三维运动仿真微机系统

论述了如何在Ｗｉｎｄｏｗｓ９５（ＷｉｎｄｏｗｓＮＴ）环境下,通过ＶｉｓａｕｌＣ＋＋调用ＯｐｅｎＧＬ图形库中的函数,开发出能实时处理具有真实感的三维图形的软件系统。将该系统与机构运动学理论相结合,根据常用机构几何参数建立数学模型后,对其进行参数化三维造型,实现常用机构三维实体的自动生成和实时三维动画处理,最后形成具有真实感的实时三维常用机构运动仿真微机系统。     

基于语义虚拟接口的三维用户界面组态

针对三维组态软件图形用户界面组态过程复杂、人机交互不自然的问题,提出基于语义虚拟接口的三维用户界面组态方法.该方法通过建立虚拟场景建模本体,借助本体语义信息辅助进行三维用户界面组态人机交互.提出虚拟接口的概念,使用虚拟接口作为场景对象人机交互语义信息的载体,用其表示场景对象之间可能的组态关系,实现了场景对象间的自动组态连接,进而实现了以简单人机交互完成复杂的三维组态任务.通过化工领域三维组态软件原型系统验证了方法的有效性.     

CAN总线在塔机状态监控系统中的应用

介绍基于CAN总线的分布式塔机工作状态信息数据采集和监控系统设计。主节点采用32位微处理器$3C2410作为核心的嵌入式系统开发平台。给出在Linux系统中主节点CAN底层驱动程序和用户图形界面GUI设计要点。主节点系统设计中用Qt作为工具进行人机用户图形界面GUI设计开发,能够在触摸屏上实时显示塔机安全方面的工况参数及动画模拟演示,具有实时时钟功能,信息量更丰富、更直观。塔机监控系统实现对塔吊运行的检测、控制、超限报警、信息查询和人机交互等功能,提高塔机监控运行效率和可靠性。     

Surface Mine System Simulation and Safety Risk Management

Modem surface mines, either mono-system or multi-systems, need a large fleet of equipment consisting of excavators, loaders, haulers and auxiliary machines. Presently, the complexity of the system, the interference between sub-systems and the lag in management skills has been a bottle neck for improving productivity of the system. Based on the fact that the traditional tools for safety analysis have been insufficient to evaluate systematically and dynamically the safety risks, this paper tries to create a virtual reality tool consisting of human, machine and mines, using Pro/E and the 3D MAX software in order to evaluate visually the operations of typical mining equipment, such as the bucket wheel excavator （BWE）, the shovel, the truck and the dragline. Within this virtual world, the behavior of the system, such as interaction, interference and potential risk can be replayed and reviewed visually. The objective of the study is to identify the critical safety issues of the system and to provide a convenient and powerful tool for safety training and safety management.     

间歇运动机构实时三维运动仿真微机系统

采用参数化造型方法 ,利用VisualC ++调用OpenGL图形库中的函数 ,开发出具有真实感的间歇运动机构实时三维运动仿真微机系统。应用该系统不仅可以进行间歇运动机构的结构设计 ,而且还可以实时地观察到所设计的间歇机构具有真实感的三维实体和运动仿真 ,为间歇运动机构的设计提供了依据。     

并行技术在工程中的设计与实践

根据某型工程系统输入输出信息量大,实时性要求高的特点,通过采用并行接口技术,使系统能充分仿真实装的技术性能,信息的传输时效实现最优,本系统传输快,软硬件结合时效优,可靠性高,可维性好。     

矿用汽车总体设计中模糊评价的模型及其实现

通过建立一种模糊评价模型,将其作为矿用汽车总体设计ICAD系统中对设计方案的评价模型,利用规则的表现形式描述模型.其方法简单可靠,满足工程设计要求.