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公开(公告)号：EP0420858B1
公开(公告)日：1995-08-23
申请号：EP89905537.0
申请日：1989-04-14
Applicant: Andros Incorporated
Inventor： ROGERS, Raymond, Earl
CPC classification number: G01N21/3504 , G01J1/18 , G01N21/274 , G01N2021/3129 , G01N2201/1211 , G01N2201/126
Abstract: An arrangement for ensuring the stability of the set point for a gas analyzer is disclosed. The set point control circuit (30b) utilizes an amplifier (192) which is alternately switched between a reference voltage and a sensor signal to provide a signal to a processor (39) representing the reference signal and the sensor singal. The processor (39) compares the two signals and adjusts the heater (60) associated with the sensor to provide a stable set point for the gas analyzer. The arrangement eliminates the need for precision resistors within the set point control circuit and therefore significantly reduces the cost of the circuitry.
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公开(公告)号：EP0253872B1
公开(公告)日：1994-04-20
申请号：EP87900946.2
申请日：1987-01-09
Applicant: Andros Incorporated
Inventor： Passaro, Robert Eugene , Rogers, Raymond Earl , Griffith, Craig James
IPC: G01J1/00
CPC classification number: G01N21/274 , G01N21/3504 , G01N2021/3159 , G01N2021/3166 , G01N2201/126 , G01N2201/1273 , G01N2201/12769
Abstract: Automatic zeroing apparatus zeroes an infrared gas analyzer automatically upon the occurrence of preselected conditions to indicate zero in the absence of absorption of infrared radiation by a gas mixture being analyzed. The gas analyzer has a sample cell (11) for containing a gas mixture to be analyzed. Infrared radiation directed through the sample cell (11) is detected at a preselected wavelength to produce a detection signal. A signal processor outputs a signal systematically related to the difference between the detection signal and a reference signal. For zeroing the sample cell (11) is filled with gas substantially nonabsorbent of infrared radiation at the respective characteristic wavelength. A comparator produces an error signal when the output signal differs from zero. A gain control (DAC 21) automatically controls the signal level of the detection signal to reduce the output signal substantially to zero with the nonabsorbent gas filling the sample cell (11). The preselected conditions may include the passage of a predetermined time and a temperature drift beyond a predetermined limit.
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公开(公告)号：EP0548287A1
公开(公告)日：1993-06-30
申请号：EP91919332.0
申请日：1991-08-30
Applicant: Andros Incorporated
Inventor： PARNOFF, George, K.
CPC classification number: B01D46/2403 , B01D46/0012 , B01D46/0023 , B01D2267/40 , F01N3/021 , F01N13/0097 , F01N2450/18 , F01N2450/30 , G01N1/2258 , G01N1/24 , G01N33/0011 , G01N2001/227 , Y02T10/20
Abstract: Un ensemble filtrant (100) permettant de préparer des gaz destinés à un analyseur de gaz d'échappement comporte un logement individuel (101) comprenant au moins trois cavités de filtre (103), (105) et (107), un passage d'admission (180) ainsi que deux passages de sortie (284) et (182). La première cavité de filtre (103) comprend un filtre grossier (121) à (125) destiné à filtrer de la matière particulaire et à la condensation d'un condensat, ledit condensat s'écoulant dans la seconde cavité de filtre (105) dans laquelle est disposé un filtre fin (141), (142) destiné à filtrer le condensat. Un passage de sortie (284) connecté à la seconde cavité de filtre (105) permet le retrait du condensat. Une troisième cavité de filtre (107) comporte un filtre fin (160) destiné à filtrer les gaz d'échappement, et il est couplé à la première cavité de filtre (103). Un second passage de sortie (182) connecte la cavité du troisième filtre (107) à une pompe permettant le retrait des gaz à analyser. On obtient ainsi un ensemble à filtre multiple dans un seul logement avec une grande surface de filtre fin, un volume de vide minimum, un minimum d'interconnexions, et permettant un accès pratique au filtre individuel, ledit ensemble se caractérisant par une filtration précise des gaz à analyser.
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公开(公告)号：EP0022789A1
公开(公告)日：1981-01-28
申请号：EP79901353.0
申请日：1979-10-01
Applicant: ANDROS INCORPORATED
Inventor： BUROUGH, Irvin George
IPC: G01N21
CPC classification number: G01N21/3504
Abstract: Un analyseur de gaz et une methode d'analyse de gaz du type a infrarouge non dispersif ou l'energie des infrarouges passe au travers d'une cellule d'echantillons (11) contenant un melange de gaz inconnu. L'energie des infrarouges passant au travers de la cellule est recue par un detecteur (13) et un signal electrique representatif est produit. Une roue filtre rotative (15) place au moins un filtre (16) dans le chemin de l'energie d'infrarouges, resultant en une sortie du detecteur a impulsions. Le signal electrique est traite pour produire une sortie indiquant la concentration des composants du melange gazeux dans la cellule a echantillons. La synchronisation avec le signal electrique traite est obtenue en derivant des impulsions de synchronisation directement du signal electrique produit par le detecteur.
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公开(公告)号：EP1332346B1
公开(公告)日：2010-03-24
申请号：EP01968604.7
申请日：2001-09-06
Applicant: NEW A.C., INC. dba ANDROS INCORPORATED
Inventor： WILLIAMS, Kevin, G.
IPC: G01J5/02
CPC classification number: G01J3/36 , G01J3/12 , G01J3/42 , G01J5/602 , G01N21/05 , G01N21/3504 , G01N2021/3137 , G01N2021/3166
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Patent Agency Ranking
公开(公告)号：EP0386125B1
公开(公告)日：1994-05-25
申请号：EP88910430.3
申请日：1988-09-09
Applicant: Andros Incorporated
Inventor： McCLATCHIE, Edward, Alexander , WILLIAMS, Kevin, Graham
CPC classification number: G01N21/3504 , G01N2021/3137 , G01N2021/3166 , G01N2201/1215
Abstract: A non-dispersive infrared gas analyzer is disclosed that accurately measures the concentration levels of a plurality of gases within a gas mixture. The analyzer includes first and second sample cells (11, 13) and is utilized advantageously for the measurement of NOx and hydrocarbon gas present in the exhaust of an automobile engine. The gas mixture of the exhaust is chilled before entering the first sample cell (11) to remove a substantial amount of the water vapor from that sample cell (13) to facilitate measurement of the NOx gas. The second sample cell receives the gas mixture in an unchilled state to allow for accurate measurement of the hydrocarbon gas. The analyzer includes processors (37, 39) which are utilized to further correct the NOx measurement and which also interact with each other to provide an output data stream that is representative of the concentration levels of the gases that are being analyzed.
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公开(公告)号：EP0548287A4
公开(公告)日：1993-12-08
申请号：EP91919332
申请日：1991-08-30
Applicant: ANDROS INCORPORATED
Inventor： PARNOFF, GEORGE, K.
IPC: B01D39/14 , B01D46/00 , B01D46/24 , F01N3/021 , F01N13/02 , G01N1/22 , G01N1/24 , G01N33/00 , B01D46/02
CPC classification number: B01D46/2403 , B01D46/0012 , B01D46/0023 , B01D2267/40 , F01N3/021 , F01N13/0097 , F01N2450/18 , F01N2450/30 , G01N1/2258 , G01N1/24 , G01N33/0011 , G01N2001/227 , Y02T10/20
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公开(公告)号：EP0201565B1
公开(公告)日：1992-01-08
申请号：EP85905726.7
申请日：1985-11-08
Applicant: Andros Incorporated
Inventor： PARNOFF, George, Kenneth , SULTAN, Steven, Leon
IPC: A61B5/08
CPC classification number: A61M16/08 , A61B5/097 , A61M16/085 , A61M16/1065 , A61M2205/7536
Abstract: An adaptor assembly for sampling gas in an airway tube attached to a patient. The adaptor assembly employs a filter arrangement (17) in a subassembly (15) which extends transversely of the axis of the pateint's airway and maximizes the ratio of the effective filter area of the dead volume added by the adaptor assembly to the sampling system.
Abstract translation: 描述了适配器组件，用于在附接到患者的气道管中取样气体。 适配器组件采用过滤器装置，其在横向于患者气道轴线延伸的子组件中，并且将由适配器组件添加的有效过滤面积与死体积的比率最大化到采样系统。
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公开(公告)号：EP0024420A1
公开(公告)日：1981-03-11
申请号：EP80900527.0
申请日：1980-02-25
Applicant: ANDROS INCORPORATED
Inventor： PORTNER, Peer Michael , JASSAWALLA, Jal Sohrab
CPC classification number: A61M5/14276 , A61M2205/3523 , Y10S128/12
Abstract: De multiples formes d'execution d'un dispositif de perfusion a implant pour l'injection de doses precisement reglees de medicaments sont decrites, chaque dispositif comprenant un reservoir (16) pour contenir le medicament, un catheter (22) pour l'emission du medicament dans le corps et un moyen d'actionnement (44) qui repond a un signal applique de maniere externe au corps pour engendrer l'emission d'un dosage regle avec precision. Dans une forme d'execution le dispositif est implante de facon sous-cutanee pour permettre l'actionnement au moyen d'un element mis en action par un solenoi, en reponse a un signal telemetrique code applique au travers de la peau. Dans d'autres modes d'execution, le reservoir est pressurise, par exemple, au moyen d'une pression de vapeur ou d'un ressort mecanique, le medicament sous pression dans le reservoir etant relache en reponse a un signal applique de maniere externe.
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公开(公告)号：EP0939898A1
公开(公告)日：1999-09-08
申请号：EP97938103.0
申请日：1997-08-01
Applicant: ANDROS INCORPORATED
Inventor： WILLIAMS, Kevin, G. , CHRISTENSEN, Kim, S.
IPC: G01N21
CPC classification number: G01N21/61 , G01N2201/0227 , G01N2201/0228
Abstract: A non-dispersive infrared (NDIR) multi-gas analyzer (405) has an optical element (950) that is positioned with respect to the axis of incident IR radiation such that it passes nearly all of the IR energy within a narrow band pass to one detector (540) and reflects nearly all of the IR energy outside the narrow band pass to another detector (535). Thus, the optical element (950) simultaneously functions both as a narrow band pass filter and a beam splitter, which transmits nearly all the IR radiation within a band pass and reflects nearly all the IR radiation outside the band pass. Additionally, the separation of the incoming energy can be achieved without an extended roll off. This allows using a reference transmission band that is very close to the absorption band of the gases of interest. It more specifically allows using a reference transmission band that is located between the absorption bands for hydrocarbons and carbon dioxide in an infrared analyzer that uses beam splitters.
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