超灵敏检漏的实时校准

超灵敏检漏的实时校准是国际上尚未解决且未标准化的一个难题,本文利用自建的微流量参考漏率系统对商用检漏仪和超灵敏检漏系统进行了实时校准的实验研究,在10-14Pa.m3/s~10-10Pa.m3/s宽范围漏率内实现了对检漏仪器的实时校准。     

冷库制冷剂管路检漏与定位实时模型研究

本文将目前国际上广泛应用于长管道输送系统中的检测管道泄漏的实时模型法应用于液态氨制冷剂管路泄漏研究。并以R22制冷剂来模拟氨系统循环管路,根据动态及泄露实验研究特性,建立检漏、定位的实时模型,并通过实验验证了该模型可以实现高效快速的检漏效果及确定漏点位置,检漏精度可达到3.0%,但定位精度及稳定性与漏点位置有关。这为冷库的安全运行提供了有效措施和理论依据。     

正压氦质谱检漏灵敏度的校准和微流量的测量

本文讨论了常用正压氦质谱检漏方法中实现灵敏度校准需要解决的主要问题。提出了几种简单的微流量测量方法，估算了其检测限，讨论了影响测量精度的一些因素。对吸枪法正压检漏灵敏度的实时校准进行了实验研究。     

远程氦质谱检漏探头装置的研制

检漏是真空获得的一个重要步骤,对于危及人员安全的高危环境,或者结构复杂而不能停机的情况,无法按照目前常规做法逐个漏孔实施检漏。通过深入研究氦质谱检漏的方法,基于PLC设计远程真空检漏探头装置,实现全程摄像头实时监控的远程在线270°范围内喷吹检漏和正压吸枪检漏。将试验结果与手动检测比较,表明该装置能够准确、有效定性检测漏点位置范围及漏率,为真空系统远程在线智能技术提供支持,减轻人工劳动强度及保障人身安全具有十分重要的实用价值。     

一种新型家用空调器成品自动静置检漏系统

通过对家用空调器系统密封重要性的分析,及对目前静置检漏工艺现状和弊端的研究,提出一种新型的家用空调器成品自动静置检漏系统,并对其进行功能介绍和工艺流程描述,以期为家用空调器企业提供一种新型的自动化手段进行成品的静置检漏。     

民爆专利信息

专利名称：磁性金属雷管空管体自动检漏机;专利名称：含水硝铵炸药水相配料溶液浓度在线实时检测装置及其方法.     

真空冷冻干燥装置的检漏

介绍了真空冷冻干燥装置工业检漏的原理和检漏方法。着重讨论充压检漏法、真空计检漏法、卤素检漏法、氦质谱检漏法在冷冻干燥机中的应用。这些方法也适用于生物制品和药品的冷冻干燥装置的检漏。文内介结了HFZV—1型真空食品冷冻干燥装置的检漏效果,达到了设计指标。     

ZQJ-291检漏仪在真空检漏设备数据采集系统中的应用

通过对检漏仪的通讯原理的分析,介绍了 ZQJ-291检漏仪在真空检漏设备数据采集系统中的应用.针对提高真空检漏设备的自动化水平的目标,详细阐述了ZQJ-291检漏仪终端软件的开发思路及关键功能的实现,在文章的最后对软件界面进行了展示.     

冰箱制冷系统检漏方法探讨

总结了冰箱制冷系统检漏经验,并参考了国外先进的检漏方法,提出在冰箱制造过程中,除制冷系统注入F_(12)后的管路焊口用卤素仪检漏外,系统的其他零部件和连接管路焊口都应当采用氮质谱仪检漏。本文介绍了冰箱制冷系统的几种检漏方法及其比较,还介绍了国外目前生产的以氦质谱仪为核心的几种检漏设备。     

ZhP－30型氦质谱检漏仪的设计特点和性能

ＺｈＰ－３０型氦质谱检漏仪采用涡轮分子泵真空系统，以逆扩散方式检漏；只有一个操作手柄的组合阀可完成预抽、检漏和放气的全部功能；取代传统的冷规，用总离子流测量质谱室压强并提供对灯丝的过压保护．本文给出分子泵作检漏用的各项特性。仪器最小可检漏率＜５×１０（－１１）Ｐａ·ｍ３／ｓ．     

Estimation of Parameters of Universal Distribution of Moments of Failure of Products

A method is proposed for estimating the parameters of a mixture of exponential and Weibull distributions for which the accuracy of preliminary estimates obtained by graphical analysis is refined in accordance with the criterion of maximum likelihood. The efficiency of the proposed method is supported by the results of statistical modeling.     

Evaluation of optical properties of highly scattering media by moments of distributions of times of flight of photons

A novel method for the determination of the optical properties of tissue from time-domain measurements is presented. The data analysis is based on the evaluation of the first moment and the second centralized moment, i.e., the mean time of flight and the variance of the measured distribution of times of flight (DTOF) of photons injected by short (picosecond) laser pulses. Analytical expressions are derived for calculation of absorption and of reduced scattering coefficients from these moments by application of diffusion theory for infinite and semi-infinite homogeneous media. The proposed method was tested on experimental data obtained with phantoms, and results for absorption and reduced scattering coefficients obtained by the proposed method are compared with those obtained by fitting of the same data with analytical solutions of the diffusion equation. Furthermore, the accuracy of the moment analysis was investigated for a range of integration limits of the DTOF. The moment analysis may serve as a comparatively fast method for evaluating optical properties with sufficient accuracy and can be used, e.g., for on-line monitoring of optical properties of biological tissue.     

卧式金属罐容量的测量结果不确定度

本文根据多年的实践检定经验 ,参照JJF1 0 59- 1 999《测量不确定度评定与表示》以及《测量不确定度表达 1 0讲》 ,对卧式金属罐容量的测量结果不确定度进行了评定。     

盐酸浓度不确定度的评估

通过对盐酸浓度标定的过程分析，找出影响结果的各个分量，进行不确定度的评定，按照计量技术规范给出标准的表示法。     

Analysis of the rate of propagation of the wave of change of boiling modes

An approximate analytical expression is derived for the velocity of the front of the wave of change of boiling modes on a rod and on a plate. The impact of the Thomson effect and of the heater orientation in the gravity field is included. Adequate agreement is demonstrated between the derived relations and experimental data.     

Estimation of potentialities of methods of summation of direct measurement errors

Conventional methods for summation of direct measurement errors are considered. Conditions under which these methods provide consistent results are stated. It is proposed to utilize for characteristic of the total error, its interval estimator or the half-sum of the value obtained by adding up its arithmetic and geometric random errors.Translated from Izmeritel'naya Tekhnika, No. 4, pp. 10–12, April, 1995.     

空压机轴承箱蜗壳温度探头油封改造

由于空压机进气侧轴承箱蜗壳温度探头密封效果不好,使空压机及其后续管道受到油污染。后将温度探头的O形圈密封改为骨架油封,杜绝了轴承箱漏油问题。文章简介空压机的结构和技术参数,详细介绍了骨架油封的制作和优点。