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    • 32. 发明申请
    • Method for Determining the Nitrogen Dioxide Concentration in Exhaust Gases
    • 确定排气中二氧化氮浓度的方法
    • US20100293925A1
    • 2010-11-25
    • US12864189
    • 2008-12-20
    • Jochen LahrRainer Pauls
    • Jochen LahrRainer Pauls
    • F01N11/00G01M15/10
    • G01N33/0037F02D41/1461F02D41/1463G01N33/0024Y02A50/245Y02A50/25
    • In a method for determining an NO2 concentration and/or a concentration ratio of NO2 and NO in an exhaust tract of a combustion device, such as an internal combustion engine, an NOx sensor that is sensitive with respect to NO2 and NO is utilized, which provides a NOx output signal correlating with an NOx concentration representing the sum of the concentrations of NO2 and NO. In order to determine the NO2 concentration and/or the concentration ratio of NO2 and NO, the NOx output signal of a first NOx sensor, which is arranged upstream of an exhaust gas treatment element arranged in the exhaust tract and having the capability of converting NO to NO2 and/or converting NO2 to NO, is compared to the NOx output signal of a second NOx sensor, which is disposed downstream of the exhaust gas treatment element.
    • 在用于确定诸如内燃机的燃烧装置的排气管中的NO 2浓度和/或NO 2和NO的浓度比的方法中,使用对NO2和NO敏感的NOx传感器,其中 提供与表示NO2和NO的浓度之和的NOx浓度相关的NOx输出信号。 为了确定NO 2浓度和/或NO 2和NO的浓度比,第一NOx传感器的NOx输出信号,其布置在排气管中的废气处理元件的上游并具有转换NO 与NO 2和/或将NO 2转化为NO的比例与排列在废气处理元件下游的第二NOx传感器的NOx输出信号进行比较。
    • 34. 发明申请
    • Detection of base contaminants in gas samples
    • 检测气体样品中的基础污染物
    • US20010019844A1
    • 2001-09-06
    • US09783232
    • 2001-02-14
    • Extraction Systems, Inc.
    • Oleg P. KishkovichWilliam M. Goodwin
    • B01L011/00G01N001/18
    • G01N33/0006G01N33/0013G01N33/0024G01N33/0037G01N33/007Y02A50/245Y10T436/117497Y10T436/13Y10T436/17Y10T436/173845Y10T436/175383Y10T436/177692
    • A detection system for detecting contaminant gases includes a converter, a detector, a primary channel for delivering a target gas sample through the converter to the detector, and at least two scrubbing channels for delivering a reference gas sample through the converter to the detector. Each of the scrubbing channels includes a scrubber for removing basic nitrogen compounds from the reference gas sample, while the primary channel preferably transmits the target gas sample without scrubbing. The converter converts gaseous nitrogen compounds in the target gas sample to an indicator gas, such as nitric oxide (NO), and a control system directs the flow of a gas sample among the primary channel and the scrubbing channels. In accordance with one aspect of the invention, the basic-nitrogen-compound concentration can be measured by comparing the concentration of the indicator gas detected in the reference sample with the detected indicator-gas concentration in the target sample. The use of multiple scrubbing channels enables the detection to operate continuously since each scrubber can be alternately purged while another is scrubbing.
    • 用于检测污染气体的检测系统包括转换器,检测器,用于将目标气体样品通过转换器传送到检测器的主要通道,以及用于将参考气体样品通过转换器传送到检测器的至少两个洗涤通道。 每个洗涤通道包括用于从参考气体样品中除去碱性氮化合物的洗涤器,而主通道优选地透射目标气体样品而不进行洗涤。 转化器将目标气体样品中的气态氮化合物转化为指示气体,例如一氧化氮(NO),并且控制系统引导主要通道和洗涤通道中的气体样品的流动。 根据本发明的一个方面,可以通过将在参考样品中检测的指示剂气体的浓度与目标样品中检测到的指示剂 - 气体浓度进行比较来测量碱 - 氮化合物浓度。 使用多个洗涤通道使得检测能够连续操作,因为每个洗涤器可以在另一个洗涤时交替地清洗。
    • 36. 发明授权
    • Continuous measurement of particulate nitrate
    • 硝酸颗粒连续测量
    • US5854077A
    • 1998-12-29
    • US658141
    • 1996-06-04
    • Jack Mikhail WolfsonPetros Koutrakis
    • Jack Mikhail WolfsonPetros Koutrakis
    • B01D46/00G01N33/00
    • G01N33/0037B01D46/00G01N33/0024Y10T436/15Y10T436/173076Y10T436/175383
    • A method for continuously measuring particulate nitrate in a gas sample, comprising the steps of passing the gas sample through an inertial impactor with a 50% cut off at 2.5 microns, removing ambient pollutant gases from the gas with diffusion denuders, passing the gas through a first path so as to contact the gas with a coated filter so as to convert particulate nitrate to nitric acid vapor or passing the gas through a second path so as to contact the gas with coated filters to trap particulate nitrate and ammonia, and measuring nitric acid vapor and residual ambient pollutant gases produced from the first path and residual ambient pollutant gases produced from the second path with a chemiluminescent monitor, the difference in the signal produced from the gases from the two paths being a measurement of the particulate nitrate in the gas sample.
    • 一种用于连续测量气体样品中的颗粒硝酸盐的方法,包括以下步骤:使气体样品通过惯性冲击器,以2.5微米的截止值为50%,用扩散溶解剂从气体中除去环境污染气体,使气体通过 第一路径,以便与涂覆的过滤器接触气体,以便将硝酸盐的硝酸盐转化成硝酸蒸汽或使气体通过第二路径,以便与涂覆的过滤器接触气体以捕获硝酸铵和氨的微粒,并测量硝酸 由第一路径产生的蒸汽和残余环境污染气体以及由化学发光监测器从第二路径产生的残余环境污染气体,来自两条路径的气体产生的信号差异是气体样品中的硝酸铵颗粒的测量值 。
    • 37. 发明授权
    • Identifying and quantifying the presence of alpha radiation and specific
gaseous molecules present in air samples
    • 鉴定和定量空气样品中ALPHA辐射和特定气相分子的存在
    • US5153520A
    • 1992-10-06
    • US557098
    • 1990-07-25
    • Robert F. Dumbeck
    • Robert F. Dumbeck
    • G01N33/00G08B17/117
    • G01N33/0055G01N33/0024G08B17/117
    • Means and methods of detecting particular particles in an air stream at very low concentration levels and identifying the particles and magnitude of concentration are afforded. Thus, a particle detector cell has a source of ionizing radiation of constant magnitude, an anode and cathode for moving ions through a radiation activity region and a detector electrode for capturing and measuring free electrons as a dynamic signal indication of the presence of particular particles in the activity region. Particular gas molecules are identified by their fingerprint, namely a spectral response to resonating frequency of electrons orbiting in their molecular structure. The magnitude of free electrons detected determine the concentration of the particles present in air. The output may be recorded on a strip chart for identification and quantification or may be logged in a digital computer. The computer may organize a frequency scanning procedure correlated with dynamic free electron activity for digital storage and recall, and for comparison with spectrum tables for identification of molecules present in an air stream. The detector is very sensitive to low concentration levels of particles such as a few microcuries of alpha particles per liter of air, with equivalent detection of particular gas molecules which can be ionized in the presence of r-f fingerprinting frequencies.
    • 提供以非常低的浓度水平检测气流中的特定颗粒并鉴定颗粒和浓度的方法。 因此,颗粒检测器单元具有恒定幅度的电离辐射源,用于通过辐射活动区域移动离子的阳极和阴极以及用于捕获和测量自由电子的检测器电极,作为特定颗粒存在的动态信号指示 活动区域。 特定的气体分子由其指纹识别,即对其分子结构中运动的电子的共振频率的光谱响应。 检测到的自由电子的大小决定了空气中存在的颗粒的浓度。 输出可以记录在条形图上用于识别和量化,或者可以记录在数字计算机中。 计算机可以组织与用于数字存储和调用的动态自由电子活动相关的频率扫描程序,并且与用于识别存在于空气流中的分子的谱表进行比较。 检测器对低浓度水平的颗粒非常敏感,例如每升空气中几个微米的α颗粒,同时检测可在r-f指纹频率存在下电离的特定气体分子。