红外水分仪选型中应注意的几个问题

目前市场上有多种型号的红外水分仪,大多数可以应用在烟草工业中测量烟草的含水率,但由于结构原理不同,其性能也有较大差别.对红外水分仪的选型进行了比较,分析了不同型号红外水分仪的性能差别,提出了选用红外水分仪时,应首选采样速度高、多波段测试、抗干扰能力强、预留多种数据接口的烟草专用型仪器.     

解决红外水分仪测量误差的对策探讨

在线式红外水分仪是烟草行业应用最广的在线式烟草含水率测量设备.分析了在线式红外水分仪的静态和动态标定技术与方法,介绍了制备标样的方法和步骤,分析、探讨了建立红外水分仪测量曲线的原理与方法以及对某一卷烟牌号获得最大和最小测试点的计算方法.试验结果表明,在进行完仪器的静、动态标定后,还要对红外水分仪进行动态跟踪、缩短校准周期和加强对仪器的清洁保养,这样可确保红外水分仪具有较高的测量精度.     

配方变化对烟草TM710水分仪检测偏差的影响研究

为确定叶组配方变化对烟草在线TM710水分仪检测偏差的影响,通过实验分析找出叶组配方变化同水分仪检测偏差之间的相关性。运用实验设计找出配方调整对水分仪偏差影响规律,建立配方调整比例与水分仪检测偏差的数学模型,找出不同配方比例变化时水分仪检测偏差的变化规律,为水分仪的校准提供一定的理论参考。     

TM710红外水分仪在香烟生产中的应用

0 引言 在香烟生产过程中,烟丝的水分含量直接影响产品的质量(烟支的填充值、吸味及保存期等).因此,对在线水分监控设备的准确度要求极高.为了进一步提高监控精度,青州卷烟厂将红外水分仪TM55替换为TM710,取得了很好的效果.     

NDC红外工程公司研制出新型在线测量仪

最近,ＮＤＣ红外工程公司研制出了一种新型ＴＭ710在线测量仪,该测量仪是专为烟草工业而设计的。它测量范围较广,适用于网络,包括数据库及ＴＣＰ/ＩＰ协议。上述可选择的操作方式为生产商提供了便捷的获得数据的方法,即可从车间、控制室、办公室或遥远的站点获得数据。ＴＭ710测量仪的设计,使得目前工厂的管理人员对单个或多个数据的集中综合排列分析变得更加便捷容易。它可随时随地轻而易举地升级以适应将来网络时代竞争的需求。为了更便捷地在因特网上发布数据信息,ＴＭ710有内置的Ｗｅｂ服务器。利用该系统,被授权的管理人员可在任何一台…     

六光束红外水分仪样机测试报告

六光束红外水分仪样机测试报告赵农（中国船舶工业总公司七院７１５所）１原理①ＣＡ６４１型四光束红外水分仪原理为：式中：ｘ与物料含水率成正比。Ｍ、Ｒ──分别为内部测量波和内部参考波，即辅光路信号；Ｍ、Ｒ──分别为照射到物料上的测量波和参考波，即主光路信号...     

红外水分仪的标定

分析了在线红外水分仪和实验室红外水分仪在标定取样过程中可能存在的影响水分仪精度的问题 ,介绍了在线红外水分仪和实验室红外水分仪的标定方法及公式 ,并提出了标定和使用时的注意事项。     

SM4红外式水分仪调试技术报告

SM4红外式水分测定仪,是一种非接触式的动态水分测定仪,目前国外在烟草、造纸、化学、食品、水泥等行业,已普遍用于生产流程中物料水分的检测和控制。为了掌握和了解该仪器的基本原理及性能,以便使其能够更好地为烟草行业服务,我们对进口的SM4红外式水分仪进行了初步的标定、调试和性能分析,现将结果介绍如下,供大家参考。     

定量——水分仪安装误差及现场环境对其测量精度的影响

定量—水分仪安装误差及现场环境对其测量精度的影响梁泽周晋安杨昆霞（广东江门化工仪表厂５２９０７０）关键词定量—水分仪定量变化量比值变化量偏移量漂移１概述ＷＤＴ—３Ａ型β射线定量仪和ＷＳＴ—３Ａ型红外水分仪是采用核技术和红外线技术进行检测，用单片机进...     

零位校准在标定在线红外水分仪中的应用

介绍零位校准的方法,通过试验对其在标定在线红外水分仪的实际应用中的可行性进行验证,并与烘箱法标定在线红外水分仪进行比较,通过对标定方式、精度控制以及实际生产情况等因素,探讨零位校准作为标定在线红外水分仪依据的可行性。     

木材水分仪校准方法研究

根据木材含水率的定义,通过大量实验,确定了可迅速定值、重复使用的高精度木材含水率试样,试样的含水率范围为7%～22%,扩展不确定度达到0.7%H2O,从而解决了各类木材水分仪的校准问题.     

物质所含水分的微波检测方法探讨

红外吸收法是目前常用的一不分测量方法,但其固有缺点使其测量精度和范围都受到了影响,微波测量是一种新的水分测量方法,水分子具有很强的极化特性和很大的介电常数,其介电常数值与电磁波频率的变化存在着规律性的关系,通过测量在一频率段内水的较高介电常数所引起的微波传播速度,波长等的变化,可间接但又准备地测出物质中水分的含量。该方法结思巧妙,操作简单,测量精度高,应用范围广,能有效地克服红外吸收法在水分测量中所暴露出来的缺点。     

An experimental approach to estimating the value of grain moisture information to farmers in Bangladesh

In the developing world grain storage losses are high and in humid areas inadequate grain drying is often a source of storage problems. Farmers and traders depend on traditional grain moisture estimation methods which are subject to a wide error margin. Grain storage decisions could be improved if farmers and traders had a low cost grain moisture meter that fit their needs. The goal of this study was to determine the desired grain moisture meter functionality and to estimate the value of grain moisture measurement for small holder farmers and for small-scale grain traders, using Bangladesh as a case study. This study was based on interviews with 140 randomly selected Bangladeshi rice farmers in 2016 and 2017, discussions with millers at 30 rice mills and a voucher based moisture meter sales program. It shows that except for rice kept for seed and home consumption, most Bangladeshi farmers sell their rice shortly after harvest to satisfy cash needs and to eliminate storage risks. They say that they would store more rice on-farm if they had better storage methods including cost-effective grain moisture testing. Survey results show that the average farm storage loss was 52 kg or 563 Taka (US$6.78) annually. Using experimental economics methods, farmers were given the opportunity to purchase a probe type grain moisture meter through vouchers with a range of prices. Twenty three of the 140 of the participants (i.e. 16%) purchased at an average of price of 374 Taka (i.e. US$4.67). No farmer purchased a voucher price over 800 Taka (US$10.00). Those who purchased moisture meters had larger farms and produced more rice than those who did not exercise the voucher. They were also younger on average, have more education and more off farm income than non-purchasers.     

一种可在线运行的烟包含水率检测仪

在打叶复烤厂片烟打包后使用微波水分检测仪 ,可实现对烟包含水率的实时监控。该检测仪无须分牌号标定 ,一条标定线完全适合于所有牌号片烟烟包的测量 ,而且还具有分段面检测烟包含水率的功能 ,可以及时剔除局部含水率不合格的烟包     

制丝线含水率在线检测无效数据的剔除

分析了制丝线在制品检测过程中产生无效含水率数据的原因,根据制丝线上红外水分仪安装位置(皮带输送机和电子皮带秤)的不同,可采取判别法和趋势法对在制品检测的无效数据进行滤除,以保证在制品含水率采集的准确性和科学性,提高卷烟的内在质量。     

宽范围便携式皮革水份测定仪的研究

本文对制革生产中的皮革水份含量测定要求进行了分析.针对皮革行业至今仍缺少能进行广泛范围测试的皮革水份测定仪的现状,本文综合分析了常用的水份测定法,选定与制革工业特点相适应的电阻法作为皮革水份测定法,突破了现有电阻法不能进行高湿测量的问题,初步完成广范围的便携式皮革水份测定仪设计.对实验测得的数据用数学方法验证了它们的正确性.该研究改善了在湿操作工段靠眼观手摸估计皮革含水量的现状.     

不同植物多糖对烟丝吸湿性和保润性的影响及其作用机制

以常见的烟草保润剂丙二醇和水为对照,比较了黄精多糖、葫芦巴多糖、小球藻多糖和灵芝多糖的吸湿保润效果,结果表明黄精多糖具有与丙二醇类似的吸湿性,但其保润效果显著优于丙二醇。以常见薄层干燥模型对烟丝低湿条件下的解吸过程进行非线性拟合,比较干燥速率常数(k)和解吸速率,发现添加黄精多糖的烟丝,干燥速率常数最小,解吸速率最慢。低场核磁(LF-NMR)结果表明,相比于空白烟丝和添加丙二醇的烟丝,黄精多糖的添加使得烟丝中物理结合水含量下降,化学结合水含量显著增加。因此,黄精多糖可以作为一种天然高效的保润剂应用于烟草,防止烟草在贮藏过程中水分的散失。     

An effective method of bulk materials moisture measurement using capacitive sensors

When we speak about capacitance moisture meters for bulk materials we have to face with different values of dielectric permittivity for different bulk materials in dehydrated state, what causes a method error that can be named ‘type uncertainty’. Besides, different varieties of the same material have different values of dielectric permittivity, which depend from geographical origin, processing conditions etc. It can be hardly predicted automatically and type uncertainty can be compensated only in separate situations with the help of preliminary calibration. Main tasks of the research are to develop new comparison principle of moisture measurement with better accuracy due to effective compensation of physical, chemical and granulometric composition influence on the result of moisture measurement, develop new primary and secondary instrument transducers. Moisture sensor consists of four measuring capacitors. Two of them should be filled with a sample, which moisture content should be determined, and other pair of measuring capacitors should be filled with a same substance, but previously dehydrated. Mathematical models, developed to take into account granulometric composition of a bulk material were used to carry out a comparison analysis for three types of instrument measuring transducers. Obtained results proved that suggested principle of moisture measurement provides effective compensation of granulometric composition influence. Developed measuring principle had been experimentally tested what helped to confirm that it provides two times better compensation of different physical and chemical composition for different materials in comparison with the direct comparison method.     

Determination and control of the moisture and salt content of butter

Work is described on on-line meters for the moisture content and salt content of butter from a continuous buttermaker. It is shown that the moisture meter gives a very accurate estimation of the rapid moisture test value, and the salt meter accurately estimates the reference salt value. The incorporation of the meters, together with a moisture and salt controller, has allowed the mean moisture content of butter to be increased by approximately 0.16%, and the mean salt content of butter has increased by 0.12%. This increase represents a considerable financial saving.