吸附式增湿饱和器

本文介绍了美国GE公司DPG—300分流湿度发生器的工作原理。针对该发生器的增湿饱和度不够的缺陷,提出了改进措施。改进的方法是通过在增湿饱和器内放置能够吸附水的吸附材料而实现的。     

分流法湿度发生器PLC控制系统的研制

采用可编程逻辑控制器(PLC)研制分流法湿度发生器的控制系统,提高了分流法湿度发生器在低湿度范围发生湿气的准确度。利用精密露点仪获得准确的露点值,并反馈控制分流法湿度发生器的各项控制参数,通过二次调节,湿度发生器可以输出湿度值更加准确的气体,发生湿气的露点最大允许误差为±0.5℃,重复性为0.15%(n=6),露点输出范围为–70~–10℃。该控制系统拓宽了分流法湿度发生器的应用范围,提高了湿度计量的工作效率。     

便携式湿度发生器的研制

介绍一种便携分流式湿度发生器的工作原理及研制过程。该便携式湿度发生器利用分流法湿度发生原理,采用微控制器和质量流量控制技术实现了自动发生不同流量、不同露点气体的功能,可为露点测试仪检定和校准提供动态标准湿度气体。通过验证试验证明,该装置测量准确可靠。     

一体化湿度校准装置的研制

介绍一体化湿度校准装置的原理、实现方法和性能特点。根据分流法原理研制湿度发生单元,根据露点法原理研制湿度控制单元,通过软硬件系统实现闭环控制,组成一体化的湿度校准装置。对其测量不确定度进行了评定,在露点–50~20℃范围内,扩展不确定度U=0.3℃(k=2);在露点–70~–50℃范围内,扩展不确定度U=0.5℃(k=2)。该装置具有自动化程度高、量值准确可靠、平衡时间短、便于移动或携带等特点,能够扩展分流法湿度发生器的应用领域。     

智能化渗透式标准湿度发生器的设计

介绍智能化渗透式标准湿度发生器的工作原理,及其软、硬件构成和系统软件的实现方式。     

湿度计量标准平台的研制

研制了湿度计量标准平台,包括精密露点测量、标准湿度发生、湿度传感器测试校准装置3个系统。各系统通过计算机软件控制,能够按照设定步骤工作,既可完成对常规湿度测量仪器的检定测试,又可对智能湿度传感器进行通讯并对其校准。     

自增湿阴极开放式PEMFC的温度调控

温度对自增湿阴极开放式质子交换膜燃料电池（PEMFC）的性能有着重要的影响. 依据自制的常压自增湿型PEMFC及温度控制设备搭建测试平台,测试了燃料电池在不同工作温度下的输出特性曲线-伏安曲线和功率输出曲线. 通过拟合得到了电极过程动力学参数,分析了工作温度影响电池性能的主要原因.     

便携式标准湿度发生器干气装置的研制

介绍了一种为混合法标准湿度发生器提供干燥气源的可再生重复使用的干气装置。混合法湿度发生器在湿度发生原理上需要一股干气源,本装置克服了以往大多干燥装置体积大、质量大、输出气体霜点温度值偏高等缺点,采用分级干燥和变色指示的方法,体积小、质量小、可重复使用、便于携带,其输出干燥气霜点温度可达-70℃以下。     

为海军提供湿度计量标准装置

国防科工委化学计量一级站为满足海军武器装置对湿度计量器具检定工作的需要,经过一年多的努力,研制安装了八台湿度计量标准装置(SB—94A湿度发生器),并于1995—03—25提交海军航空工程学院验收,经逐台测试,一次验收合格。该产品是     

流动注射—冷蒸气原子吸收法测定垃圾样品中泵

研究了反应介质浓度及其流速，反应管道长度，共存元素等对使用ＬＺ－１２００型流动注射氢化物发生器和ＷＦＸ－１０型原子有收分光光度计测定垃圾样品中汞的影响。方法准确度，精密均匀好，且操作简单，试剂用量少，分析速度快。经实验应用，结果满意。     

试验箱温、湿度校准装置的研制

介绍试验箱温、湿度校准装置的模型建立,温、湿度传感器的选择及软硬件构成,利用温、湿度精密测量,多路信号输入,单片机控制等功能,实现装置的温、湿度多点校准。通过验证试验证明该装置测量准确可靠。     

Ozone synthesis under UV irradiation

The main parameters governing the ozone concentration and the yield of an ozone generator were studied: the power and frequency of the voltage applied to UV lamp, temperature, and humidity of air. The relationship between these parameters and the ozone concentration was established.     

A simple technique for studying the dependence of radon and thoron exhalation rate from building materials on absolute humidity

Indoor radon and thoron concentrations were dominated with their exhalation rate from building materials. Thus, the evaluation of exhalation rate with highly precise is important. This paper presented a new technique to measure the dependence radon/thoron exhalation rate, from building materials used in Japan, on absolute humidity. The measurement technique consisted of a solid state alpha detector equipped a ventilation-type chamber and humidity control system in a flow through method. The exhalation rate of dried samples (Indian red granite and Japanese gray granite) was measured at various absolute humidity levels in the range of 1–20 g cm⁻³. It was found that exhalation rate increased exponential with increasing of absolute humidity for both samples. Furthermore, the dependence of radon emanation coefficient on building material’s temperature was also studied using an accumulation chamber equipped with scintillation cell alpha detector. The emanation coefficient of dry sample increased proportionally with increasing the material’s temperature with a correlation factor of 0.88.     

多路温湿度测试巡检系统设计

介绍了多路温湿度测试巡检系统的组成结构及设计方案；温湿度变送器和温湿度巡检系统的设计研制。     

Transport of Aerosols in Underground Mine Workings in Terms of SARS-CoV-2 Virus Threat

This paper presents a method of implementation and the results of aerosol dispersion tests in underground mine workings. Numerous tests were carried out to determine the potential risk of SARS-CoV-2 coronavirus infection in the underground environment of the mines. The influence of selected parameters of mine air on the possibility and method of aerosol transmission through ventilation routes was experimentally determined in real conditions. The concentration of additional aerosols in the class of ultrafine and fine aerosols increased with the distance from the generator, while the concentration of coarse particles decreased. Assuming the consumption of the solution with which aerosols were generated, even at a small level of 1 cm³/min., the number of additional aerosols was several hundred particles in one cubic centimeter of air at a distance of 50–70 m from the generator. The concentration of ultrafine particles in the range of 40–20,000 nm increased from 122 particles/cm³ to 209 particles/cm³ at air temperature of 12 °C and relative humidity of 95–96%, and from 90 particles/cm³ to 243 particles/cm³ at air temperature of 17 °C and relative humidity of 76–82%, with the increasing distance from the generator (10 m to 50 m).