称重计量系统远程的方法

文章介绍称重计量系统远程的原理组成及工作方式,着重描述了远程传输、远程自动静态称重.     

汽车衡自动称重网络管理系统

随着市场经济的不断深化和企业改制工作的持续发展，企业对进出厂物资计量数据的准确性、科学性、及时性及权威性提出了更高的要求。当前我公司进出厂物资计量多用汽车衡，操作繁琐，失误偶有发生；称重数据报送不及时；不利于物资的合同化管理等；都给不法分子作弊以可乘之机。因此，在加强管理的同时，还需要运用更有效的技术手段来适应新形势的要求，开发汽车衡自动称重网络管理系统并应用成为深化改革的必然。本文提出了汽车衡自动称重网络管理系统的实施方案。一、系统硬件组成高品质计算机、称重传感器及仪表、IC卡、读卡器、RS485…     

动态称重测力技术的现状和发展动向

本文从动态测量、自动在线测量、模型化测量和数字化测量四个方面,阐述了称重测力技术的现状和发展动向。简要介绍了动态称重测力的特征及研究方法,叙述了自动在线测量的必要性及常见的自动称,并指出模型化、数字化测量的意义及开发软件技术的重要性。     

自动称重管理系统的研究与应用

2005年我矿使用了煤炭营销信息系统，此系统的使用提高了我矿煤炭销售信息化管理水平，但随着管理要求的提高和市场需求的变化，原有的称重系统已不满足我矿工作的要求。为此，2012年我矿率先对现有的硬件设备和软件系统进行了升级改造，启用了“自动称重管理系统”。     

微机在索道运输自动称重中的应用

一、概述在我国工农业生产(尤其是矿山企业)中以索道作为运载工具已收到良好的经济效益。我们研制的D-SYJ系统,能够有效地解决索道运输的自动称重问题。 D-SYJ系统具有以下主要功能: 1.自动显示任一时刻出现在索道测试段     

一款基于AD7718的多通道数字称重系统设计

设计了一款多通道数字称重系统,该系统利用24位A/D转换器AD7718实现称重数据采集,在称重数据处理中应用移位平均滤波、去极值平均滤波相结合的混合滤波算法,提高了称重系统的稳定性和准确度。测试表明该称重系统能够实现多通道称重系统的数字化处理,并符合JJG 555—1996非自动衡器中的中准确度级衡器的允差要求。     

自动轨道衡微机称重系统的研制

自动轨道衡是对运行中的列车进行计量的大型衡器设备,承担着大宗物料的计量。掌握这类衡器的关键技术,开发出相应的微机称重系统,对于提高称量精度、减少过衡出错,都具有非常重要的实际意义。1微机称质系统的击本组成及功能自动轨道衡根据所称对象的不同,分为多种类型。除装运液体的罐车和特殊车辆外,多采用单台面机械秤体。火车通过台面时,秤体机械部件将承受到的重力传递到秤体四角的传感器上。传感器的信号并联输出,经通道放大、A／D转换,送入微计算机。微机对称重结果进行各种处理。自动轨道衡微机称重系统见图1。（1）机械秤…     

基于LabVIEW的甲烷产气量自动测量系统设计

针对实验室现有的厌氧发酵装置产气测量存在费时费力、人眼读数误差较大、自动化程度低等问题,设计一种基于LabVIEW的甲烷产气量自动测量系统。提出采用排水法与称重计量法结合的测量方法,以实现产气量自动测量。称重传感器获取发酵甲烷产气排水后得到水的质量,经换算得到排水体积即甲烷产气体积。利用LabVIEW编写软件平台,采用NI USB-6251数据采集卡对发酵过程中的关键参数如甲烷产气量、温度和pH值进行实时采集、处理、显示及存储,同时控制夹管阀和蠕动泵实现自动补充排水液的功能。利用微量注射器对自动测量系统开展性能验证实验。试验结果表明:该装置的测量平均相对误差最大值为1.10%。该系统可以满足发酵实验对甲烷气体的测量需求,不仅能够提高自动化水平还可以提高测量准确性。     

利用计算机实现汽车衡的自动计量管理

电子汽车衡在各工矿企业大量应用 ,但大多是人工计量 ,统计的工作量也很大。由司磅工手工填写磅单 ,手工统计汇总 ,工作效率低。为杜绝人为因素对称重计量的影响 ,我们决定利用计算机实现汽车衡的自动计量管理。一、系统硬件及软件现在电子汽车衡的称重显示仪表一般都具有RS- 2 32标准接口输出 ,该系统就是利用RS- 2 32串行口与称重仪表进行通讯。该系统硬件十分简单 ,它是由一台IPC - 5 0 0工业控制计算机和一台KX -1 2 2 1打印机组成 ,计算机通过RS2 32串行口与称重仪表联接 ,来采集仪表的称量值。本着通用性强、维护方便、扩充容易…     

浅谈煤矿地磅房称重系统改造中PLC智能控制器的应用

在我国许多煤矿的煤炭销售的地磅称重中还沿用着原始的人工操作。这一工作模式不但工作效率低、容易出错、不易快速统计销售量,而且也给某些不法者以可乘之机,一定程度上影响了煤矿的效益。因此提高煤矿的销煤工作效率,杜绝煤炭称重过程中的人为因素,实现称重数据采集自动化,是煤炭企业发展的一个重要方面。本文在分析煤矿企业地磅无人自动称重流程的基础上,指出传统的利用继电器控制系统在称量过程中存在的不足,提出了一种利用PLC智能控制器代替继电器控制系统对煤矿地磅称重系统改造的方案。     

Insertion of triangulated surfaces into a meccano tetrahedral discretization by means of mesh refinement and optimization procedures

In this paper, we present a new method for inserting several triangulated surfaces into an existing tetrahedral mesh generated by the meccano method. The result is a conformal mesh where each inserted surface is approximated by a set of faces of the final tetrahedral mesh. First, the tetrahedral mesh is refined around the inserted surfaces to capture their geometric features. Second, each immersed surface is approximated by a set of faces from the tetrahedral mesh. Third, following a novel approach, the nodes of the approximated surfaces are mapped to the corresponding immersed surface. Fourth, we untangle and smooth the mesh by optimizing a regularized shape distortion measure for tetrahedral elements in which we move all the nodes of the mesh, restricting the movement of the edge and surface nodes along the corresponding entity they belong to. The refining process allows approximating the immersed surface for any initial meccano tetrahedral mesh. Moreover, the proposed projection method avoids computational expensive geometric projections. Finally, the applied simultaneous untangling and smoothing process delivers a high‐quality mesh and ensures that the immersed surfaces are interpolated. Several examples are presented to assess the properties of the proposed method.     

Certification Institutions Expected to Update and Transfer Information on Present Standards

Standards are the basis for production enterprises to organize production, ex-factory inspection, trade (delivery) and technical exchanges, product certification, quality arbitration and supervision.……     

Flow calorimeter for enthalpy increment measurements on condensed gases

A flow calorimeter for enthalpy increment measurements on condensed gases is presented. A better knowledge of the properties of the liquefied natural gas is needed, and therefore a liquid loop has been designed for our flow calorimeter. The fluid loop in the calorimeter is designed in order to avoid the two-phase region, since two phases would give compositional disturbances in the measurements. The avoidance of the two-phase region is made possible by increasing the pressure of the test fluid after the measurement section, then heating the fluid at super-critical pressure past the critical point. Finally, the fluid is throttled to the low-pressure gas state at the inlet condition of the compressor that circulates the fluid. To perform the pressure increase, a new cryogenic pump has been designed. To evaluate the new equipment, measurements were taken on liquid ethane over the temperature range 146–256 K at pressure between 0.9 and 5.1 MPa.     

From Industry 4.0 to Research 4.0. Development of High Performance Fibers in the Light of Digitization

We associate a variety of innovations with the term ＂Industry 4.0＂. The pioneer of many 4.0 modifications forms the basisfor the trend towards the integrated di...     

Refrigerators Enter a New Era of Health Preservation Frestech initiates the establishment of China's first standard for household sterilization refrigerators

On November 30, 2007, the China Association for Standardization (CAS) held a press conference at Beijing Diaoyutai State Guest House. Leaders from the China Household Electric Appliance Research Institute, the China Household Electric Appliance Association, and the China Consumers' Association attended and made speeches.……     

Optimum-Simulation von Ernteprozessen

Zusammenfassung Bei der Gestaltung von Ernteprozessen — beispielsweise des Prozesses Mähdrusch, Körnertransport und -abnahme — als transportverbundene Fließarbeitsverfahren mit mindestens zwei verschiedenen Arbeitsmitteln gibt es einen großen Optimierungsspielraum. Solche Prozesse sind mehrstufige Bedienungsprozesse mit gemischter Anordnung der Bedienungseinrichtungen. Außerdem besitzen sie stark ausgeprägte räumliche Aspekte. Es wird vor allem gezeigt, welche Merkmale solcher Prozesse in Simulationsmodellen abgebildet sein müssen, welche Zielgrößen in Abhängigkeit von welchen Einflußgrößen unter Berücksichtigung welcher Prozeßbedingungen ermittelt werden sollten und wie der Bewertungsprozeß zur Ermittlung der gewünschten Informationen gestaltet werden muß.     

Roman iron and steel: A review

ABSTRACT

The production of ferrous metal increased during the Roman Late Republican period, Principate and Empire. The direct bloomery process was used to extract the metal from its ores using slag-tapping and slag-pit furnaces. The fuel was charcoal and an air blast was introduced by bellows-operated tuyères. Iron formed as a bloom, often as a spongy mass of metal, which contained impurities from the smelting process, including unreacted ore, fuel, slag and fragments from the furnace walls, while the metal was often inhomogeneous with varied carbon contents. Blooms were either smithed directly into bars or ingots or they were broken up, which also allowed the removal of gross impurities and a selection of pieces with similar properties to be made. These could then be forge-welded together and formed into characteristically shaped ingots. Making steel in the furnace seems to have been achieved: it depended on the ore and the furnace and conditions within it. Surface carburization was also carried out. Iron and steel were used extensively in construction and for tools and weapons. Fire welding was often used to add pieces of steel to make the edges of tools and weapons, which could be heat-treated by quenching to harden them.     

A study of centrifugal cast high boron high speed steel

In the present study a high‐boron high speed steel (HSS) roll material was designed. Many expensive alloy elements have been substituted by cheap boron alloy, and high‐boron high speed steel roll has been manufactured by centrifugal casting method. The microstructures, mechanical properties and wear resistance of centrifugal casting high‐boron high speed steel roll have been investigated by optical microscopy (OM), scanning electron microscopy (SEM), and X‐ray diffraction (XRD) analysis, hardness test, impact test and wear test. The results indicated that the solidification microstructures of high‐boron high speed steel roll consisted of M₂(B,C), (W,Mo)₂(B,C), M₃(B,C), M₂₃(B,C)₆ type borocarbides and martensite, a small amount of retained austenite. Borocarbides were continuously distributed over the grain boundary. After quenching from 1050 °C, local broken network appeared in partial borocarbides, and fine secondary borocarbide precipitated from the matrix. After tempering from 525 °C, the amount of precipitated borocarbide increased significantly. After heat treatment, the hardness of high‐boron high speed steel roll excelled 60 HRC, and its impact toughness excelled 8.0 J/cm². The single groove steel rolling amount of high‐boron high speed steel rolls increases by 500% than that of bainite cast iron roll, when the rolls are used in K₁ mill housing of bar mill.     

Thixotropy of Systems with Shear Thinning and Plastic Flow Behavior

The definition of the thixotropy is a decrease in viscosity with time in shear and a subsequent recovery of viscosity after the shear deformation is removed.We ...