漏孔

介绍了各国常用的三种定量比对校验方法：标准漏孔比对法、定量气体浓度比对法和定量气体量比对法。

This paper introduces three quantitative comparison inspection methods : standard bore sight comparison , quantitative gas density comparison and quantitative gas quantity comparison .

BP将尝试封闭墨西哥湾海底石油漏孔。

BP readies'top kill'to plug oil leak in Gulf of Mexico .

Hough变换在汽车纵梁漏孔检测中的应用

Application of Hough Transform in Detecting Hole on Auto Carling

通过传递标准漏孔与德国PTB开展了漏率比对，验证了测量不确定度评估结果的可靠性。

Through the leak-rate comparison with PTB using standard leak , the reliability of uncertainty evaluation results has been verified .

标准漏孔的校准结果与德国PTB校准结果的一致性好于1.3%。

The standard leak was calibrated by Lanzhou Institute of Physics ( LIP ) and PTB of Germany , respectively , with a difference less than 1.3 % .

传统汽车纵梁漏孔检测主要以人工方式进行：检测工人把纵梁和标准纵梁AutoCAD图纸进行比对来检测是否有漏孔、用千分尺等工具手动测量孔心位置是否合乎要求。

The traditional detecting missing holes on Auto-Carling is carried on through a artificial way . Mainly , the workers detect the missing holes through compared Auto-Carling with the standard AutoCAD blueprint and use micrometer calipers to measure the positions of holes .

恒压式气体微流量计（CPFM）被多个国家级实验室选作为计量学设备，用来校准真空规和真空漏孔。

The constant pressure flowmeters ( CPFMs ) were used to calibrate vacuum leaks and vacuum gauges in some national laboratories .

温度对薄膜渗氦型漏孔漏率的影响研究

Researches on temperature effects on leakage rate of helium permeating leak

固定流导法校准真空漏孔方法研究

Study on method of calibrating vacuum leak with constant conductance method

利用静态膨胀法真空装置和质谱计校准标准漏孔

Calibration Leaks Using the Static Expansion Vacuum Standard and Mass Spectrometer

分析了漏孔在温度夹变时漏孔的热物理过程和与之相适应的漏孔漏率变化。

The leak thermophysical process and leakage rate change with tempera-ture are analysed .

不同压力下正压漏孔漏率研究

Study on leakage of pressure leak with different pressures

压漏孔校准装置性能测试

Performance tests of calibration apparatus of pressure leak

用气体微流量标准装置校准参考漏孔

Reference leak calibration with gas flow standard apparatus

标准漏孔校准中若干问题及其解决办法

Errors and Improvement Methods to Calibrate Standard Leaks

正压漏孔校准装置的不确定度评定

Uncertainty evaluation of pressure leak calibration apparatus

标准漏孔校准装置

The Calibration Apparatus of A Standard Leak

对多漏孔放矿放出体的研究

Research on the original body recovered from drawn-ore & from multi - drawpoint during ore caving

正压漏孔校准装置的研制

Development of Pressure Leak Calibration System

石英膜标准漏孔渗氦过程中稳定时间与延迟时间的关系

Relation between lag time and stationary time during helium permeation through typical leak of quartz film

真空混合漏孔示漏气体的延迟和保持特性研究

The Study of Superlong Delay and Holding Time Characteristics of The Detectable Gas through Vacuum Mixing Leak

真空漏孔的校准方法

Calibration Methods of Vacuum Leaks

粘滞漏孔常温液体与气体漏率比的分析计算

Analysis and Calculation of Leakage Rate Ratio of Normal Atmospheric Temperature Liquid and Gas of Viscous Flow Leak

为了精确校准较小漏率真空漏孔，研制了固定流导法真空漏孔校准装置。

A novel type of apparatus has been developed to accurately calibrate the ultralow leak rate with constant conductance method .

该文介绍正压漏孔校准装置的校准原理，设计方法，参数选取。

The calibration principle , the design method and the parameters selection for the pressure leak calibration apparatus are introduced .

定量气体动态比较法是采用定量的示漏气体作参考标准，替代参考漏孔动态比较法中示漏气体通过参考正压漏孔后在累积容器中的累积量。

In dynamic comparison method with quantitative gas , the quantitative gas takes the place of the accumulated test gas through reference leak .

静态膨胀后，测量它们在动态流量法系统中产生的动态平衡分压力，再进行线性近似比较计算出被校正压漏孔的漏率。

Thirdly the expanded gas was introduced to a dynamic flow system and the dynamic balance partial pressure of test gas was measured and compared .

同时，发现随着漏孔长度的减少而压力指数变大的规律。

The experimental results show that the relationship is correct and the exponent of the gas pressure increases with the decreasing length of leaking hole .

认为漏孔在突然处于低温状态时，漏率变化的主要因素是示漏气体滞粘系数随温度的变化而造成，漏孔尺寸随温度变化引起漏率变化是次要的。

The leakage rate change is mainly due to the coefficient of leak gases viscosity which varies with temperature . The leak dimension change is next .

本文介绍的校准装置，它可以用己知漏率值的参考漏孔相对比较法来校准漏孔。

This report introduces the calibration apparatus which is need through the reference leak in the relative comparison method of the known leakage rate value to calibration leaks .