刮板细度计示值误差非接触自动校准装置

采用光谱共焦传感器以及激光位移传感器相互配合的设计方式,研制一套新型刮板细度计示值误差非接触自动校准装置。利用光谱共焦传感器测量光点可小至5μm的优点,实现对刮板细度计测量点的精准定位,同时避免了接触测量造成测头及测量面磨损的问题。经实验证明,该装置测量重复性好、效率高,测量结果准确可靠,具有重要技术推广价值。

刮板细度计非接触测量数据处理研究

对基于光谱共焦技术搭建的刮板细度计斜槽面深度测量装置的非接触测量数据进行处理算法研究。引入高斯滤波对整段测量数据进行滤波分析,再分左上平面、右上平面、斜槽底面三段进行高斯滤波,分离三个测量面的表面粗糙度信号及波纹度信号,解算出粗糙度值。对于高斯滤波中线,利用最小二乘法进行拟合,结果表明左右上平面的直线倾斜度一致,可拟合为一条直线。以再次拟合的直线为基准线,求得斜槽面扫描点至基准线的深度值,得到斜槽面深度标称值为90μm的示值误差为0.27~1.97μm。与电感测微仪接触测量所得数据进行比对,结果表明本文提出的刮板细度计非接触测量数据处理方法准确可靠。

刮板细度计测量方法及分量探讨

刮板细度计是一种计量器具,主要是用于涂料及油墨颗粒细度的测量,也就是对被分散产品在生产、存储和应用过程中的细度检测。由此可见,刮板细度计性能的稳定性可靠性在量值传递中的就非常重要,本文以（0~25）μm规格的刮板细度计为例进行检测方法及其影响分量进行初步地探讨。

刮板细度计示值误差检定方法的探讨

笔者在长期的刮板细度计检定工作中,发现了一些按规程规定的方法检定所引起的问题,希望通过本文分析解决。

刮板细度计智能检定装置的研制及刮板斜槽底面平面度的检定方法探讨

刮板细度计是用来测量涂料、漆浆、油墨和其它液体浆状物中颜料及杂质颗粒大小和分散程度的常用计量器具,为保证刮板细度计计量性能的准确可靠,研制刮板细度计检定装置对刮板细度计的主要计量性能进行测量。重点介绍了该检定装置的结构和对刮板细度计斜槽底平面度的检定方法。

刮板细度计示值误差测量系统的设计

介绍了一种刮板细度计示值误差测量系统的设计方案。该系统利用LabVIEW平台设计,通过PCI-6014数据采集卡采集位移传感器信号,并对采集数据进行分析处理,最后出具测量原始记录。系统极大的提高了刮板细度计检定工作的工作效率和自动化程度,具有很强的应用价值。

长度计量基础知识讲座(四十一)

研磨细度是衡量涂料内在质量的重要指标之一，它对于涂料成膜质量、漆膜光泽、耐久性和涂料的贮存稳定性等均有很大影响，因而成为涂料生产的常规性必检项目之一。随着表面装饰的需求和涂料的发展，刮板细度计的应用越来越广泛。刮板细度计主要用来测量色漆、漆浆和油墨等产品内颜料、填充料及杂质的颗粒细度，也可用于测量类似物质的颗粒细度。

贵金属浆料细度测定方法

采用刮板细度计测定银系列浆料、银钯系列浆料、银铂浆料的细度。

油墨细度检测中的影响因素

油墨细度(Fineness)是与油墨的流变性能以及经济效益直接相关的一个重要指标。细度一般指混合在连结料中的颜料、填料等固体粉状物质被分散的程度。油墨太粗,印刷中会造成毁版、糊版,更不适于印刷网线较细的高档印刷品,同样颜料含量的油墨,细度较细者比细度较粗者着色力高。目前国内企业检测油墨细度的方法,主要还是采用刮板细度计法。下面以胶印油墨为例进行阐述。

非光学量测试与设备

O348.1 2003010707自动测量杨氏弹性模量的研究=Study of auto-measuringYoung’s elasticmodulus[刊,中]/黄宜军(空军第一航空学院基础部.河南,信阳(464000)),曾宪林//激光与红外.-2002,32(4).-274-275介绍用线阵CCD光电传感器为接收器,自动测量和实时显示的杨氏弹性模量自动测量系统。

Density, Viscosity, and Excess Properties for Binary Mixture of Diethylene Glycol Monoethyl Ether ＋ Water from 293.15 to 333.15 K at Atmospheric Pressure

Densities and viscosities were measured as a function of composition for binary liquid mixture of diethylerie glycol monoethyl ether [CH3CH2O（CH2）2O（CH2）2OH] ＋ water from 293.15 to 333.15 K at atmospheric pressure, with a capillary pycnometer and Ubbelohde capillary viscometer respectively. From the experimental data, the excess molar volume V^E, viscosity deviation △η, and the excess energy of activation for viscous flow △G^＊E were calculated. These data were correlated by the Redlich-Kister type equations to obtain the coefficients and standard deviations. The results showed a strong molecular interaction between diethylene glycol monoethyl ether and water.

Viscosity testing method of ultra-low temperature drilling fluids for polar glacier drilling

According to the working environment of the polar glacier core drilling, a separatory funnel capillary viscometer which can be used for testing the viscosity of liquids under ultra-low temperature conditions was de- signed. This viscometer has a simple structure and it is easy to operate, which can meet the testing requirements of different temperature conditions. The viscosity of the dimethyl silicone oil KF-96L-2.0cs was measured under different temperatures using this designed viseometer, and it is found that the viscometer coefficient K changes linearly with temperature. This testing method has relatively high test accuracy and its relative error is less than 4%, which can be used to test the viscosity of the different liquids in ultra-low temperature conditions.

Density and Viscosity of Ternary Systems(Poloxamer 188+Ethanol/ Acetone+Water)at Temperatures from 288.15 K to 308.15 K

The densities and viscosities of ternary systems(Poloxamer 188+ethanol/acetone+water)were meas- ured at 288.15,293.15,298.15,303.15,308.15 K and atmospheric pressure for different mass fractions of Poloxamer 188(0 to 0.02)in aqueous solution and different solvent volume fractions of ethanol/acetone(0 to 0.3)in Poloxamer 188 aqueous solution.The densities were measured by a pycnometer,while the viscosities were measured using two Ubbelohde capillary viscometers.The correlations of density and viscosity of these ternary systems are obtained by fitting the experimental data at different temperatures,mass fractions and volume fractions.

Production of a Mathematic Equation Using Statistical Data for the Determination of Kinematic Viscosity in Blends of Diesel Fuel with Biodiesel

In this paper, the authors try to export an equation which describes the variation of kinematic viscosity in blends of diesel fuel with biodiesel. Using specific volume of these blends, the authors determine kinematic viscosity via method ASTM D 445-06 using a capillary glass viscometer in order to study the contribution of quantity of biodiesel and convert the statistical data into mathematic relation as a specific formula, attempting to achieve an empirical evaluation. Trying to accomplish this, the authors studied the way how the values of variables are changed and whether a relation exists using dispersion diagrams. From the graphic depiction, the authors realized that the relation is linear and they proceeded to regression analysis. The analysis extracted the conclusion that the relation was strong and the values of the dependent variable kinematic viscosity was depended on a large percentage of the values of the mixture of fuels.

Sensitivity analysis of key input parameters in conditional cell transmission model for oversaturated arterials

A novel conditional cell transmission model （CCTM） is a potential simulation tool because it accommodates all traffic conditions from light condition to oversaturated condition. To test the performance of the CCTM, a series of experiments for sensitivity analysis were designed and performed for a multilane, two-way, three-signal sample network. Experiment 1 shows that the model is performed in a logical and expected manner with variations in traffic demand with time and direction. Experiment 2 shows when the possibility of the occurrence of a useful gap increases to 60% and 100%, the delays in left rams decrease by 5% and 15%, respectively. In Experiment 3, comparing the possibility of a conditional cell of 0 with 100%, delay of left turn and delay of the entire network were underestimated by 58% and 11%, respectively. Hence, sensitivity analysis demonstrates that by reflecting local drivers＇ behaviors properly, the CCTM provides an accurate representation of traffic flow in simulating oversaturated traffic conditions.

Temporal and spatial distribution of virioplankton in large shallow freshwater lakes

Virioplankton dynamics at seven sample sites(from two freshwater lakes) with different trophic states were monitored over the period of a year.Water was sampled monthly from August 2004 to July 2005,and the abundances of viruses and bacteria were measured using direct epifluorescence microscopy counting.Results indicated that both natural and anthropogenic factors could influence the distribution of virioplankton.Temporally,viral abundance was significantly correlated to bacterial density and water temperature.Spatially,viral abundance was significantly correlated to trophic state.This in turn indicated that viral abundance was directly dependant on host abundance in eutrophic lakes,while trophic state and temperature could drive the distribution of virioplankton.The virus-bacteria ratio was significantly lower in less productive water-bodies.The result implied that the control of virioplankton on their hosts may change according to the host density.

Effect of Static Magnetic Field on Extracellular Proteins Synthesis in Escherichia coli

Escherichia coli type 1 was used as a model system to determine whether static magnetic fields are a general stress factor. The bacterial broth culture were exposed to different magnetic force （400, 800, 1200 and 1600 Gauss） with incubation at 37 ℃ for different times （24, 48 and 72 hrs） under aerobic conditions. The response of the cells to the magnetic fields was estimated from the change in total protein synthesis by using spectrophotometer at 550 nm and by using of SDS-PAGE （Sodium dodecyl sulfate- polyacrylamide gel electrophoresis）. Results concluded that was approximately no reproducible changes qualitatively in extracellular proteins were observed in the SDS-PAGE electrophoresis and did not act as a general stress factor. While, increases in the level of extra-cellular synthesis were observed using different magnetic field exposed samples when compared with the control.

Effect of Ultrafine Particles on Flow Field and Transport Properties near the Interface Around a Moving Bubble

Laser Doppler Anemometer has been used to measure the flow field characteristics near the interface around a moving bubble in the presence of ultrafine particles. In order to model a moving bubble, the bubble was fixed into the counter flow liquid by a metal mesh. Experimental materials are air and water, and the particles are complex oxidate powder. Experiments were carried out under the operating conditions: the liquid flow velocity u 0 is 12.6 cm/s, the equivalent diameter d e is 0.6 cm, the mass concentration of particle is 0.2 0 0 ,the average particle diameter is about 10 nm and the density is 2 g/cm 3. The velocity profiles of both frontal and tail vortex areas were measured respectively. The experimental results show that the velocity fields are obviously changed in the existence of particles. In the frontal area of the bubble, both tangential and normal velocities decrease due to the presence of particles, but in tail vortex area, the tangential velocities increase remarkably, and normal velocities rise gradually from the center towards the fringe in the opposite tendency to that of no particles. The influences of flow field change in the presence of particles on gas liquid mass transfer are analyzed and discussed.

Therapeutic Efficacy of Quinapyramine Sulphate with Freund＇s Complete Adjuvant in Wistar Rats Infected with Trypanosoma Congolense

Therapeutic efficacy of QS （quinapyramine sulphate） and FCA （Freund＇s complete adjuvant） combination was studied. The aim of the study was to evaluate therapeutic efficacy of QS using FCA in Trypanosorna congolense infection. GrouPs treated with QS and FCA had parasite disappeared in peripheral circulation 2 days pi, relapse was observed one week later. Effect of treatment on rectal temperature shows no significance （p 〈 0.05）, normalization of rectal temperature occurred in QS and FCA treated groups （34.1℃） than untreated （42.8 ℃）, QS （37.4 ℃） and FCA （35.92 ℃） treated groups. Mean body weight was significant （p 〈 0.001） in QS and FCA, QS, and FCA groups. Packed cell volume and hemoglobin concentration for untreated groups were lower, but increased in QS, FCA, QS and FCA treated groups, indicating anemia amelioration. White blood cell counted in untreated, QS and FCA treated groups showed no significance （p 〈 0.05）, however, there was leukocytosis due to lymphocytosis in QS and FCA treated group （6.79 × 10^3/μl） compared with untreated and other groups. There was comparative decrease in serum liver enzymes in QS and FCA treated group than other groups. Therefore, QS at lower recommended dose with FCA may enhance efficacy of QS in trypanosomiasis.

The Hematology of Lactating Buffalo Fed Local Foliage as Feed Supplement

The research aimed to determine the effect of feed supplements of cassava （Manihot esculenta Crantz） leaves, gliricidia （Gliricidia sepeum） leaves and katuk （Sauropus androgynus （L.） Merr.） leaves on the hematology of lactating buffalo. Four lactating buffaloes in Kanagarian Pamatang Panjang, Sijunjung district, West Sumatera, Indonesia were studied. The experiment used a Latin square design with four treatments and four replications/block. The treatments were control （without supplementary foliage, A）, with cassava leaves （B）, with gliricidia leaves （C） and with katuk leaves （D） each at 5 kg/haead/day. The hematology variables measured were erythrocytes and leucocytes counts, as well as levels of hemoglobin and hematocrit. The results showed that supplementary foliage of 5 kg/head/day of cassava, gliricidia or katuk as leaves significantly increased the erythrocytes count and hemoglobin level, but did not affect the number of leucocytes in lactating buffalo.