数字式称重系统在物资计量中的应用

数字式智能称重传感器及数字称重系统是近些年来电子衡器领域应用的热点,文章介绍了120 t数字式称重系统在物资计量中的应用,以及该系统的结构和组成,并且着重分析了数字式称重系统的优点,实际应用表明,数字式称重系统能够满足现代化工业生产的要求.     

RH真空铝料斗称重系统的简述

简述了炼钢厂RH炉真空铝料斗称量系统的组成及其采用的称重传感器和称重模块,并对称重传感器的安装和西门子称重模块的设定以及所涉及软件的使用过程进行了详细地介绍,同时对称重系统的标定方法、S7200CPU获得重量数据后程序的处理过程及信号的传递过程进行了介绍。     

钢包回转台称重系统改造

采用在升降液压缸底部安装传感器的间接称量法对济钢第一炼铁厂连铸机大包回转台的称重系统进行改造 ,同时对系统实行可靠的冷却防护和信号传输。改造后的称重系统提高了耐高温、抗冲击、防钢水飞溅能力 ,而且现场适应性好 ,性能稳定 ,维护方便     

基于称重传感器长线传输及自动补偿技术的研究

介绍了称重传感器与控制计算机长线传输的技术，该技术应用于铁合金配料系统中具有提高测量精度和自动补偿的作用，并能减少计量误差。     

出钢车电子称重系统的研究与实践

介绍了称重系统准确度不高的原因,通过选用合适的传感器、改进出钢车结构以及加强对电子系统的保护,提高了传感器的使用寿命和系统的稳定性,使称重系统的准确度基本保证在千分之三以内。     

原料仓桥式起重机称重控制系统改造实践

为保证原料配矿作业中投矿量的精确称重计量,中原黄金冶炼厂对原料配矿仓桥式起重机称重控制系统进行了改造。介绍了桥式起重机称重控制系统的改造技术方案:采用西门子PLC、称重模块和触摸屏组合代替传统的称重仪表,并且和电气控制系统相互独立,进行软件编程数据处理,将模拟量信号转化为质量信号。改造后,起重机称重控制系统符合国家3级秤的相关标准和要求,满足生产要求,简化了系统的结构,应用效果良好。     

电工钢张力测量数据分析及闭环控制的建立

运用现代化测量技术，采用数字管理手段，实现了对张力传感器测量信号的实时监测、记录及异常报警信息收集。同时，采用现代信号处理和分析方法，提出EMD（经验模式分解）算法分解张力信号，可以在线实时提取和分析张力传感器故障特征，并进行闭环控制，可用于检测与诊断传感器早期故障，优化张力差控制轧制模型，提高轧制后的电工钢产品质量。     

数字式称重传感器的校验

在现有的模拟式称重传感器校验系统的基础上,我们增加了托利多T800型称重显示仪表用来接收数字信号,并将其传输至计算机以对数字式称重传感器进行校验,取得了良好的效果,并分析了可能引入的系统误差。     

PLC在自动称重控制中的应用

针对某企业原有称重设备技术水平落后、控制精度和生产效率低的实际情况,对出料装置、称重传感器配置及电气、称重控制过程实施了技术改造。改造后的控制系统以PLC为核心,称重传感器为检测元件,变频电动机为执行元件,人机界面为监控手段,提高了系统的控制精度和稳定性。开发了控制系统和人机界面程序,增强了系统的可扩展性,为企业创造了良好的经济效益。     

失重计量喂料器在焙烧车间给料系统中的应用

钼精矿的焙烧是大多数钼深加工项目的第一个环节,也是至关重要的环节~([1])。失重计量喂料器在焙烧车间给料系统中的应用实现了钼精矿焙烧的均匀自动补料和自动给料~([3, 6])。失重给料器通过称重传感器检测的信号经PLC控制实现一系列的动作,该高精度称重传感器能实时测量料仓中物料的重量,改变了传统的配料喂料方式,提高了配料喂料配比的均匀性,提高了工厂自动化的水平,而且极大提高了用户产品的品质。     

西门子SIWAREX U系列称量系统性能分析与调整技巧

西门子公司SIWAREX U系列称量系统因其具有精度高、组态编程方便的特点而广泛应用于冶金领域动态称量。通过实践探索，总结出在安装、调试、校准等方面的注意事项和技巧方法，从而提高了该系列称量系统的精度和线性度。     

GCU—100B铁水称重轨轨重道衡的技术分析

采用先进的称重轨整体台面技术，使台面结构简单，稳定性好。因内首次使用温度传感器通过计算机软件自动修正称重传感器误差，克服了温度对电子轨道衡计量精度的影响，对短轴距异型车辆实现动态计量有参考价值。     

动态称重技术的应用与展望

简述了动态称重的技术及应用现状,对其技术做了展望。     

Use of the selective linogram in cardiac tomography quality control

BACKGROUND: Quality control for detection of patient motion is essential in tomographic myocardial imaging. Despite significant limitations, the summation image or conventional "linogram" has long been advocated as a useful image in the detection of vertical motion. In this study a new quality control image entitled the "selective linogram" is proposed to replace the summation image in routine cardiac single-photon emission cardiac tomography (SPECT) quality control. The selective linogram is constructed in a manner somewhat analogous to the sinogram. In the sinogram, each row represents a different projection angle; in the selective linogram each column represents a different projection angle. METHODS AND RESULTS: After selection of eight motion-free studies from acquisitions at our clinical center, vertical motion of various types (bounces, shifts, and creep) were added to the projection frames. Summation image and selective linogram quality control images from these motion-containing studies and the original motion-free studies were presented in a blinded manner to two observers for scoring of patient motion. The selective linogram was significantly more accurate in allowing detection of vertical motion than was the summation image (accuracy 89% vs 47%). CONCLUSIONS: The selective linogram image is markedly superior to the summation image for the detection of vertical patient motion during cardiac SPECT. This new technique can be a valuable aid in SPECT quality control.     

石钢公司轧钢分厂成本核算计算机系统

综合利用了计算机网络技术,数据库管理技术,实现了石钢轧钢分三物产品从秤房称量到成本核算和打印生产报表的全过程全部由计算机自动完成,使成本核算办公自动化成为现实。     

合金自动称量技术在转炉炼钢中的应用

介绍了120t转炉炼钢合金料自动称量控制系统的结构设计、编程、数据处理方法,分析了强振速度、弱振速度、弱振值、落差值等参数对称量精度的影响。该系统运用MB 通讯技术实现称量值反馈,可以完成几种合金料连续称量过程。使用证明,系统称量误差控制在了1kg之内。     

On the binocular summation of chromatic contrast

The binocular summation of chromatic contrast was investigated under a variety of stimulus conditions. Binocular and monocular contrast detection thresholds were measured using 0.5 cpd Gabor patches. It was found that, using stimuli which contained combinations of chromatic and luminance contrast, binocular detection could take place independently in luminance-contrast- and chromatic-contrast-sensitive mechanisms. It was also found that, with chromatic stimuli, levels of binocular summation were above those expected from probability summation between the eyes, and thus showed evidence for binocular neural summation within chromatic detection mechanisms. The implications of these results for (a) the binocularity of chromatic detection mechanisms, and (b) the suggested link between stereopsis and binocular neural summation, are discussed.     

板坯自动称量技术及其应用

介绍一种用于板坯称量的１６ｔ级板坯秤及其自动称量技术。该秤具有独特的机械构造，由ＰＬＣ控制液压驱动系统完成秤架的升降，实现对板坯的自动称量。     

Individual differences in loudness processing and loudness scales.

Assessed parameters of the psychophysical function for loudness (a 1,000-Hz tone) for 9 undergraduates in 3 experiments: binaural loudness summation, temporal loudness summation, and judgments of loudness intervals. Findings reveal that the loudness scales that underlay the additive binaural summation closely approximated S. S. Stevens's (see record 1957-02311-001) sone scale but were nonlinearly related to the scales that underlay the subtractive interval judgments, the latter approximating W. R. Garner's (see record 1954-07051-001) lambda scale. Interindividual differences in temporal summation were unrelated to differences in scaling performance or in binaural summation. Although the exponents of magnitude-estimation functions and the exponents underlying interval judgments varied considerably from S to S, exponents computed on the basis of underlying binaural summation varied less. Results suggest that interindividual variation in the exponent of magnitude-estimation functions largely reflects differences in the ways that Ss use numbers to describe loudness and that the sensory representations of loudness are fairly uniform among people with normal hearing. The magnitude of individual variation in temporal summation seems at least as great as the magnitude of the variation in the underlying loudness scale. (78 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

湘钢提高连铸方坯质量的措施

湘钢二炼钢厂应用了钢包和中间包称量系统、中间包连续测温装置、结晶器电磁搅拌技术和钢水液面自动控制系统、红外线自动定尺切割装置以及大方坯连铸机高效化技术,减少了连铸方坯内部和表面质量缺陷,提高了产品质量.