Adaptive Method’s Application for the Identification Systems in Dynamic Weighing

In this work,the possibility of adaptive algorithm in WIM(weight-in-motion)systems,in which fibre optic sensors are used,is shown.Appointment of dynamic weighing device consists in determining the weight and type of vehicle.In this work an algorithm for processing the input data and fiber optic sensor to create the database used in the algorithm is presented.The results of the algorithm for the identification of vehicles are given.The conclusions are made and options of increasing the accuracy of the identification algorithm are considered.

Credibility and Security of Weighing System for Large Structure Object

The weighing system designed for large structure object is mainly composed of three parts. The part of hydraulic system is made up of hydraulic cylinders, high pressure hydraulic hoses and electric pumps; the part of computer controlling system comprises pressure sensors, displacement sensors, data acquisitions, RS 485 network and the computer controlling model; the part of loading system is composed of the fulcrum structure and the concrete girder. The measurement principle and composition of the weighing system are discussed in this paper. Credibility and security of the weighing system are fully considered during the design phase. The hydraulic system is controlled by pilot operated check valves in case of the sudden loss of system pressure. The states of all gauges and RS485 network are monitored by computer controlling system functioning in different modules. When the system is running incorrectly, it will be switched to manual mode and give alarm. The finite element method is employed to analyze fulcrum structure so that the system has enough intensity to be lifted. Hence the reliability of the whole system is enhanced.

Adjustment of precipitation measurements using Total Rain weighing Sensor(TRwS)gauges in the cryospheric hydrometeorology observation(CHOICE)system of the Qilian Mountains,Northwest China

Precipitation is one of the most important indicators of climate data,but there are many errors in precipitation measurements due to the influence of climatic conditions,especially those of solid precipitation in alpine mountains and at high latitude areas.The measured amount of precipitation in those areas is frequently less than the actual amount of precipitation.To understand the impact of climatic conditions on precipitation measurements in the mountainous areas of Northwest China and the applicability of different gauges in alpine mountains,we established a cryospheric hydrometeorology observation(CHOICE)system in 2008 in the Qilian Mountains,which consists of six automated observation stations located between 2960 and 4800 m a.s.l.Total Rain weighing Sensor(TRwS)gauges tested in the World Meteorological Organization-Solid Precipitation Intercomparison Experiment(WMO-SPICE)were used at observation stations with the CHOICE system.To study the influence of climatic conditions on different types of precipitation measured by the TRwS gauges,we conducted an intercomparison experiment of precipitation at Hulu-1 station that was one of the stations in the CHOICE system.Moreover,we tested the application of transfer functions recommended by the WMO-SPICE at this station using the measurement data from a TRwS gauge from August 2016 to December 2020 and computed new coefficients for the same transfer functions that were more appropriate for the dataset from Hulu-1 station.The new coefficients were used to correct the precipitation measurements of other stations in the CHOICE system.Results showed that the new parameters fitted to the local dataset had better correction results than the original parameters.The environmental conditions of Hulu-1 station were very different from those of observation stations that provided datasets to create the transfer functions.Thus,root-mean-square error(RMSE)of solid and mixed precipitation corrected by the original parameters increased significantly by the averages of 0.135(353%)and 0.072 mm(111%),respectively.RMSE values of liquid,solid and mixed precipitation measurements corrected by the new parameters decreased by 6%,20% and 13%,respectively.In addition,the new parameters were suitable for correcting precipitation at other five stations in the CHOICE system.The relative precipitation(RP)increment of different types of precipitation increased with rising altitude.The average RP increment value of snowfall at six stations was the highest,reaching 7%,while that of rainfall was the lowest,covering 3%.Our results confirmed that the new parameters could be used to correct precipitation measurements of the CHOICE system.

A New Correction Method of Electronic-weighing System for Blast Furnace

In the injection of pulverized coal into a blast furnace, there are some factors which affect the readout of electronic weighing system. Through analyzing the measuring errors, it is found that the main reasons are pressure fluctuations of storage tank and puffing tank. According to the interaction of pressures, a neural network based method combined with fuzzy logic is adopted to enhance the precision. Experimental results show this method is satisfactory.

Design of Weigh Feeder Control System for Energy Saving Using Performance-Adaptive Method

This paper discusses a design method for the control system of a weigh feeder that supplies powder and granular material at a constant rate. Most weigh feeders employed in industry are controlled by proportional and integral （PI） compensation, and the control performance is decided by the selection of parameters. To attain advanced control performance by PI control, the PI parameters are designed on the basis of generalized minimum variance control （GMVC）. In this study, to achieve user-specified control performance by GMVC-based PI control, the design parameters of GMVC are automatically adjusted using a performance-adaptive method. The control performance discussed in this study consists of the variance of the control error and that of the difference in the control input. In a conventional performance-adaptive method, the variance of the control error is reduced. In this study, to reduce energy consumption and to achieve user-specified control performance, the variance of the difference in the control input is specified and the design parameter is determined. To demonstrate its effectiveness, the proposed method is applied to an actual weigh feeder.

实测车流作用下大跨悬索桥吊索疲劳性能分析

为研究车辆长期作用下悬索桥吊索的疲劳性能,以南京栖霞山长江大桥为工程背景,利用该桥动态称重系统的实测数据,采用有限混合分布拟合了车辆荷载模型.然后,基于时间权重矩阵模拟了桥面多车道随机车流,并基于Ansys计算了随机车流作用下的桥梁动力时程响应.在上述基础上,获取了大桥短吊索、长吊索和限位吊索3组典型吊索的应力时程,并采用名义应力法对其疲劳性能进行分析.结果表明:在随机车流作用下,大部分时间段内吊索应力波动较为平稳;各吊索应力变化趋势与车流量的变化密切相关,短吊索、长吊索以及限位吊索的最大应力幅分别为40、30和25 MPa;在车辆荷载的长期作用下,短吊索的疲劳可靠度显著低于长吊索与限位吊索.

基于检修工艺的固定式地铁车辆称重系统应用研究

随着地铁的快速发展以及乘客对乘车舒适性要求的提高,整个地铁行业对车辆运行品质和性能的要求也越来越高。地铁车辆称重系统可实现对地铁车辆的精准调平,为行车安全提供保障。文章对地铁车辆称重系统现状进行分析,基于西安地铁2号线的检修工艺设计,介绍地铁车辆称重系统在车辆段检修工艺中应用的必要性,以及其在西安地铁2号线渭河车辆段中的应用实例。相关研究结论和建议可为地铁车辆称重系统在车辆段检修工艺设计及应用方面提供参考。

基于STM32的牡蛎重量分级机控制系统设计

为提高牡蛎自动化加工水平,基于STM32单片机设计牡蛎重量分级控制系统。该控制系统由数据采集模块、分级控制模块、驱动模块和人机交互模块组成,以牡蛎重量为分级标准,称重托盘重量和位置信息为主要控制条件,采用遗传算法优化神经网络(GA-BP)动态称重模型和动态追踪定位方式,准确获得牡蛎重量和称重托盘位置,使用触摸屏进行人机交互,可实现称重分级一体化。试验结果表明,该控制系统的称重误差最大为0.8 g,在最大运行速度下,分级准确率达到95%,较好地实现牡蛎快速称重分级。

基于称量反馈的设施番茄灌溉系统的构建与应用

为提高设施番茄灌溉的精准性,该研究设计了一种基于称量反馈的灌溉系统,该系统包括称量反馈模块、多源信息采集传输模块、灌溉决策模块与水肥执行模块。称量反馈灌溉决策首先利用卫星定位模组获取灌溉地经纬度信息自动计算当天的日出时刻、日落时刻、日中时刻,结合椰糠条吸水特性与番茄植株日需水量变化规律,把1 d自动划分为4个不同的动态灌溉阶段;根据温室内温湿度信息及排液电导率(electrical conductivity,EC)值反馈的番茄植株根部信息,制定了一般模式灌溉肥液或洗盐模式灌溉清水(或低浓度营养液)。设计试验以基于辐射累积控制灌溉、定时灌溉作为对照,分别从栽培效果、灌溉效果、应用效益方面验证该灌溉系统的应用效果。结果显示使用该称量反馈灌溉系统比基于辐射累积控制灌溉系统灌溉量增加1.8%,用肥量减少7.3%,排液比降低7.9%,排液EC值降低9.3%;与定时灌溉方式相比灌溉量减少11.3%,用肥量减少20.0%,排液比降低17.9%,排液EC值降低4.9%。栽培效果显示,使用该称量反馈灌溉系统的椰糠条栽培番茄在茎粗、叶片叶绿素相对含量、糖度值、单穗质量和基于辐射累积的控制灌溉相比无显著性差异(P>0.05),但株高增加4.8%;与定时灌溉相比在株高、茎粗、叶片叶绿素相对含量、糖度值、单穗质量均无显著性差异(P>0.05)。预计使用该称量反馈灌溉系统,园区15栋日光温室(1.22 hm^(2))相比基于辐射累积控制灌溉,应用效益月节约0.276万元,与定时灌溉方式相比,园区月节约2.247万元。该系统简化了番茄植株需水量的计算过程,实现了番茄栽培水分的精准感知与按需精量灌溉。

有机盐weigh3钻井液抗高温稳定性研究

有机盐weigh3是碱金属多元有机酸盐、有机酸铵、有机酸季铵的复合盐,该有机盐能有效提高钻井液处理剂的抗高温能力。钻井液处理剂在有机盐weigh3溶液中的热降解温度,随其浓度的增加而显著增高。实验结果表明:低粘聚阴离子纤维素(PAC-LV)在密度为1.40 g/cm3的有机盐中抗温能力可达到190℃,比清水中提高近50℃;XC在密度为1.40 g/cm3的有机盐溶液中抗温能力可达到180℃,同样比清水中提高近50℃。

Changes of coastline and tidal flat and its implication for ecological protection under human activities: Take China’s Bohai Bay as an example

The change processes and trends of shoreline and tidal flat forced by human activities are essential issues for the sustainability of coastal area,which is also of great significance for understanding coastal ecological environment changes and even global changes.Based on field measurements,combined with Linear Regression(LR)model and Inverse Distance Weighing(IDW)method,this paper presents detailed analysis on the change history and trend of the shoreline and tidal flat in Bohai Bay.The shoreline faces a high erosion chance under the action of natural factors,while the tidal flat faces a different erosion and deposition patterns in Bohai Bay due to the impact of human activities.The implication of change rule for ecological protection and recovery is also discussed.Measures should be taken to protect the coastal ecological environment.The models used in this paper show a high correlation coefficient between observed and modeling data,which means that this method can be used to predict the changing trend of shoreline and tidal flat.The research results of present study can provide scientific supports for future coastal protection and management.

Design and application of refrigerant recoveryand fillingcontrol system based on MSP430

The control scheme of multifunctional refrigerant recovery and filling control system for air conditioning system is presented in this paper.The scheme of hardware circuit based on micro controller unit （MCU） MSP430 uses high-precision weighing sensor and high performance amplifier.The software program uses median average filtering algorithm.The device can recycle discarded refrigerant after purification and quantitative filling refrigerant.Meanwhile,the apparatus has the functions of recovery,filling,pressing,vaccumizing,refueling,etc.The system is proved to be of low cost,good stability and high practical value.

智慧称量背景下的秤台位移预警系统研究

就钢铁行业深入推进智慧称量背景下,对大型衡器的秤台位移预警系统的研究与应用做了阐述,系统实现了对大型衡器秤台位移变化的情况进行实时监测,并按照设定的规则,根据秤台位移情况进行预警,对设备进行技术确认和维护,确保称量数据准确、可靠。

基于自适应滤波器的皮带机动态称重信号处理方法

针对目前皮带机动态称重系统的称重信号存在噪声或干扰的问题,提出了一种改进自适应噪声消除(IANC)的称重信号处理方法。建立了皮带机动态称重系统动态响应过程的数学模型。设计了结合卡尔曼和最小均方的算法(KF-LMS),提升了ANC噪声消除的性能。实验阶段,通过模拟和搭建实验平台对所提方法进行测试。结果表明,与LMS,NLMS,SLMS等算法相比,所提的KF-LMS算法在皮带机动态称重信号处理中具有良好性能,具备较高的可靠性和称重精度。实验结果验证了所提方法的有效性和实用性,该模型具有广阔的应用前景。

密闭固体投料系统在增塑剂装置上的应用

基于密闭固体投料系统在增塑剂装置上的应用,本文比较了三种最为普遍的输送方式的优缺点,证明了管链输送不仅密封效果好、安全性高,同时具有较高的输送效率和较低的维修成本。对于腐蚀性小的固体料,管链输送的投用成本在可接受的范围内,是最适宜用于化工生产中固体料输送的方式,说明了其在增塑剂装置生产中的优越性。通过总结应用过程中的维护要点,并对实际运行进行了优化,管链输送成为增塑剂装置的密闭固体投料系统中更为方便、成熟的实用型技术。

基于多传感器采集轴重信号的公路货车不停车称重系统

在公路货车不停车称重过程中,由于缺少对车辆行驶各种干扰因素的深度分析,导致称重系统精度不足,因此该文提出基于多传感器采集轴重信号的公路货车不停车称重系统。根据现场称重情况确定多传感器安装位置,设计信号采集模块,并对多组采集数据进行处理,依据车辆行驶路况和车辆质量计算车辆荷载,结合硬件设计部分实现车辆的动态称重,同时利用传感器检测车辆的轨迹线横向位置,进一步确定车辆的称重数据。测试结果表明,提出的基于多传感器采集轴重信号的称重系统信号采集延迟小、测量精度高,该系统的抗干扰性得到了提高。

物联网技术搭建的电梯称重系统设计

旨在研究物联网技术在电梯称重系统中的应用,并对所设计的称重系统进行了全面的功能测试和性能评估。研究的初衷是解决当前传统的电梯称重系统存在的精度不高、易受环境因素影响,以及维护成本高等问题。为了达成这一目标,不仅研究了电梯称重系统的实际需求,还从硬件和软件两个方面进行了系统设计和集成。在系统硬件设计的过程中,明确了电梯称重系统的基本组成,选择了适合的传感器、控制器和通信模块,并对这些硬件设备进行了深入的调研和实地考察,提出了创新性的设计方案。

中药自动抓配系统的设计

随着中医药的发展,中药文化在传统医学体系中扮演着重要的角色,为了解决医药医生抓配中药困难的问题,设计了一款基于STM32的中药抓配系统。设备上位机接收医生开出的药单,通过串口通信下发指令给抓配设备的主控,抓药设备根据接收的指令,控制药柜前的横向与纵向步进电机、称重传感器等设备,实现对中药材的自动抓配。医生通过上位机对中药抓配过程进行远程监控。该系统通过数字化、智能化的手段,提高了中药抓配的精准性和效率,也促进了中医药的传统文化与现代科技的融合。

基于物联网技术的食品称重装置监测系统设计

以物联网技术为核心,设计了基于LabVIEW的称重装置监测系统,系统模块主要包括感知层、网络层、应用层。感知层主要通过信号传感器、采集卡及ZigBee发射模块与接收模块等设备采集数据信息,采集到的数据经融合后通过网络层传输至应用层予以存储。针对应用层,利用LabVIEW软件设计了监测界面,用于分析和判断设备的工作状态,可在一定条件下发出报警。

化学品库和危废库火灾报警与监控方案

详细介绍了某氯碱厂新建化学品库和危废库火灾报警系统和监控系统的设计方案。