EP0925430B1 - Procede de determination d'une valeur de mesure, notamment de la concentration d'un aerosol dans une chambre fermee d'une machine de travail - Google Patents

Procede de determination d'une valeur de mesure, notamment de la concentration d'un aerosol dans une chambre fermee d'une machine de travail Download PDF

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Publication number
EP0925430B1
EP0925430B1 EP97938726A EP97938726A EP0925430B1 EP 0925430 B1 EP0925430 B1 EP 0925430B1 EP 97938726 A EP97938726 A EP 97938726A EP 97938726 A EP97938726 A EP 97938726A EP 0925430 B1 EP0925430 B1 EP 0925430B1
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EP
European Patent Office
Prior art keywords
bus
rail
coupler
line
connection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97938726A
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German (de)
English (en)
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EP0925430A1 (fr
Inventor
David Stedham
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Electrical Engineering Co Ltd
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Electrical Engineering Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/10—Indicating devices; Other safety devices

Definitions

  • the invention relates to a device according to the preamble of claim 1.
  • DD-A-239 474 or GB-A-2 166 232 each have one Device of the type mentioned in the known for Each engine of an internal combustion engine is provided with a measuring probe is, with each measuring probe directly inside the respective Engine room is arranged and via an optical or electrical transmission path with an outside of the Internal evaluation engine located central evaluation unit connected is. It is disadvantageous that in particular higher frequencies mechanical vibrations of the working machine are harmful to the electronic converter system and the contact connections act.
  • the object of the invention is a device of the beginning mentioned type to improve, so that vibrations of the working machine do not have a damaging effect on the converter system.
  • bus line rail is arranged resiliently in the mounting rail and with the BUS coupler a low-frequency tuned vibration system forms, in particular higher-frequency mechanical Vibrations of the machine are not detrimental to the BUS coupler and the contact connections between the contact connections and affect the BUS counter contacts.
  • the measuring probe can be used to determine various measured values such as for example temperature or other physical Sizes. However, it is preferably for Determining the concentration of an aerosol, in particular designed an oil mist.
  • the device according to the invention can be used as a quick assembly system be trained.
  • the entire system is preferably designed to be watertight, that when cleaning the working machine jet water cannot penetrate the electrical circuit system.
  • the device is advantageously further designed such that that the electronic converter system against electromagnetic Outside influences are protected and on the other hand prevents electromagnetic radiation from the electronic circuits to the outside.
  • FIG. 1 shows one on a work machine, for example device arranged for determining a piston engine of measured values, preferably an aerosol in particular of the oil mist in an engine compartment, preferably a diesel engine.
  • the device contains a through the motor wall (1) protruding measuring probe (M) connected to a BUS coupler (K) is connected to the outside of the Motor is arranged on a bus rail (S).
  • M protruding measuring probe
  • K BUS coupler
  • S bus rail
  • a guide tube (2) of the measuring probe (M) is screwed in, to which a Venturi channel nozzle (3) is attached is.
  • the circular motion by the crankshaft rotation set drive chamber atmosphere (4) flows through the Venturi channel nozzle (3) and generates one at the removal point (5) Vacuum.
  • the measuring chamber (7) is above this negative pressure the outflow channel (6) connected. This creates the drive room atmosphere at the feed point (8) into the measuring chamber (7) flows in and flows through it and returns to the tapping point for negative pressure (5) and passes through the Venturi channel nozzle (3) back into the engine room atmosphere (4).
  • the feed point (8) for the oil mist in the engine room atmosphere upstream is a labyrinth (9), which prevents that oil spray can penetrate into the measuring chamber (7).
  • the Measurement signals for the oil mist density are in a measuring section (10) in the measuring chamber (7). This is the measuring chamber (7) at one end with a fiber optic cable (11) in it running glass fiber bundle for the light supply (12) and the light return line (13) connected.
  • the two fiber optic bundles (12) and (13) end in a glass fiber bundle socket (14) with ground glass fiber exit surface.
  • a collecting lens (15) which over the the glass fiber bundle (12) supplied light through the measuring section (10) directs to the triple reflector (16).
  • the triple reflector (16) reflects light independently of one exact adjustment of the converging lens (15) and the triple reflector (16) exactly on the lens (15), which in turn the light focuses in the glass fiber bundle (13) so that it at the end of the fiber optic cable (11) for the electronic Implementation can be found.
  • oil mist contains the measuring section (10) in both directions, namely from the lens (15) to the triple reflector (16) and back to the lens (15), light passing through it Dampened intensity, so that through the light fiber bundle (13) returned light in electronic signal conversion at the end of the fiber optic cable (11) a smaller electronic one Triggers signal amplitude.
  • each BUS coupler (K) contains an electronic converter system (17) which receives the measurement signals implements and feeds a bus line rail (18) the end (19) of an electronic, not shown Evaluation device is connected.
  • the BUS cable rails (18) are inserted in metallic BUS mounting rails (20), that have a fixed standard length.
  • the BUS rail (S) with the BUS mounting rails (20) are in turn by BUS mounting rail holder (22) on the motor wall attached.
  • the BUS mounting rail holder (22) in turn by means of a clamping nut (23) on the guide tube of the Measuring chamber (2) attached, as in particular from Figures 1 to 5 and 7 emerges.
  • the synthetic resin block (26) clamping rubber skin (30) becomes a BUS coupler (31), from which the contact connections (28) on the Stick out the flex foil with the contact spring assembly (29).
  • the rubber skin (30) of the BUS coupler has a slit shape Opening (32) in its circumference with one in the rubber skin (30) molded hollow snap groove (33) is enclosed, such as in particular Figures 8 and 11 can be seen.
  • Figures 8, 9 and 10 show that in the rubber skin (30) furthermore a winding channel (34) with the holding lips (35) is shaped to accommodate the, depending on the engine type, not required standard length of the fiber optic cable (11), which with its end over a the optical fiber cable (11) waterproof enclosing tubular opening (36) in the rubber skin (30) inside the winding channel (34), into the electronic Transducer system (17) is introduced, the glass fibers for light supply (12) in a light emitting diode (37) are introduced and the glass fibers for light return (13) are introduced into a light sensor converter diode (38).
  • the BUS line rail (18) contains the electronic PCB in the standard length of the BUS mounting rail (20) executed BUS line (40) and has the BUS counter contacts (39), as in Figure 6 in a section of the BUS line is shown on the BUS circuit board (40).
  • the BUS circuit board (40) is, as in particular from the Figures 9 and 12 emerges on a bus metal rail (41) glued on with spring holding hook profile (42).
  • the BUS coupler (31) engage when inserted in the BUS mounting rails (20) the free end of the contact spring package (29) under the Spring-holding hook profile (42), so that the positive Pushing the BUS coupler (31) down on the BUS line rail (18) the contact connections (28) of the flex film with the BUS mating contacts (39) are connected and the required Get contact pressure.
  • Figures 9 and 12 show how the water protection of the BUS circuit board together with the etched BUS lines (40) with the BUS metal rail (41) into a rubber skin (43) are vulcanized.
  • the BUS counter contacts (39) are here through a slot-shaped BUS counter contact opening (44) in the Recessed BUS rubber skin (43).
  • the elastic rubber connection (48) is designed so that the entire, suspended on it Ground, consisting of the BUS line rail (18) and the electronic converter systems housed on it (17) a mechanical vibration system with low frequency tuned resonance frequency forms. This allows the harmful higher-frequency mechanical vibrations on the electronic converter system (17) and the Contact connections between the contact connections (28) the flexible film and the BUS mating contacts (39) do not act.
  • the fiber optic cable emerging from the measuring chamber (7) (11) is received in a slotted hose (49), in which it is inserted through the slot (50).
  • the slit hose (49) itself is on the BUS mounting rail holder (22) guided and fastened by means of retaining tongues (51), which in turn in a groove profile (52) on both sides of the slot (50) of the slotted hose (49) engage.
  • the slit hose in turn ends in a collecting channel (53), which also is provided with a slot (54) so that the fiber optic cable (11) also inserted into the slotted hose (49) can be, if this is inserted in the collecting channel (53).
  • the collecting channel (53) made of rubber goes over the total standard length of the bus mounting rail (20), whereby it by means of a holding profile in a corresponding holding groove (55) in the BUS mounting rail (20) over the entire standard length the BUS mounting rail (20) is attached.
  • the glass fiber cable leaves the Collection channel (53) via a slot opening (56) in the collection channel (53) and reaches the BUS coupler at the entry point (57) and then enters the entry point (58) into the winding channel of the BUS coupler. Not through integer winding lengths definable remaining length of the standard fiber optic cable forms a loop (59) into the matching holding grooves (60) on the top of the BUS coupler (31) is pressed in ( Figure 10).
  • the Fiber optic cable (11) and the BUS coupler (31) easily replaceable, by removing the sensor from the BUS mounting rail (20) and the fiber optic cable through the slot opening pulled out of the collecting duct (53) in the collecting duct (56) and further out of the slit hose (49) through the slit (50) can be pulled out in the slotted hose, even if the latter with its end a piece in the collecting channel (53) is introduced, after which the measuring chamber (7) from the Retaining tube (2) is removable.
  • a replacement sensor unit (61) can be put back into the system be used.
  • the slotted hose (49) is with its Groove profiles (52) fixed in the collecting duct (53) so that the Slot (50) in the slot hose (49) and the slot opening (56) to lie exactly one above the other in the collecting duct (53) come.
  • BUS coupler (31) on the opposite side of the spring assembly snapped into the spring retaining hook profile (42) (29) is in the rubber skin according to FIGS. 11 and 12 (30) of the BUS coupler a locking groove (62) is formed in which one in the rubber skin of the BUS cable rail (18) trained locking hook (63) engages.
  • the rubber body forming the collecting duct (53) made of a conductive rubber material is the rubber body forming the collecting duct (53) made of a conductive rubber material.
  • This bus line rail coupler (69) are similar to the BUS couplers (31), however, do not contain an electronic converter system (17), no winding channel (34) and no holding grooves (60).
  • the mounting rail spacers (2) are off made of the same metallic parts as the BUS mounting rails (20) and also with a metallic lid (64) provided ( Figure 15), which in the closed state by the holding nose (66) of a collecting channel (53) is kept closed becomes.
  • the BUS mounting rails are in these intermediate pieces BUS connection lines (68) laid.
  • the mechanical connection the BUS mounting rails with the mounting rail spacers (21) takes place via a metallic connecting tongue (70), which are t-shaped on both sides Recordings (25) of the BUS mounting rail (20) are inserted. This makes BUS mounting rails (20) and mounting rail intermediate pieces (21) in their longitudinal escape direction with each other stabilized.
  • FIGS. 3 to 4 and 14 and 15 become the BUS mounting rails (20) and mounting rail spacers (21) by means of a connecting element (71) or Intermediate piece made of conductive rubber Component connected to the slipping out of the connecting tongues (70) from the BUS mounting rails (20) or the Prevent mounting rail spacers (21).
  • the rubber not only prevents the connecting tongues from slipping out (70) by elastic clamping, but it is also the BUS mounting rails (20) and the mounting rail spacers (21) stretched together in the longitudinal direction.
  • the connecting elements (71) with metal clamping tongues (72), the flat in the longitudinal direction of the holding grooves in the BUS mounting rail be introduced and when erecting the frame (71) in the Profile section level in the retaining grooves (47) of the BUS mounting rail (20) jam because of their dimensions are kept larger than the retaining grooves (47) of the BUS mounting rails (20).
  • the connecting element (71) is fixed connected to the BUS mounting rail (20).
  • the mounting rail intermediate pieces (21) are with the connecting element (71) connected by a metal frame (73) with metal frame clamping tongues (74) in the mounting rail intermediate piece with the cover (64) open into the retaining grooves (47), which also on the support rail intermediate pieces (21) are present, similar to the connector above (71) made of conductive rubber, inserted flat, then erected and in a frame groove (75) of the Connecting element (71) are engaged.
  • the BUS connecting lines (68) are to simplify the Assembly of the system and to simplify the procurement of spare parts also with one, to bridge the largest possible Maximum length of the mounting rail spacers (21) required standard length. Because the distances between the BUS mounting rails (20) and thus also the mounting rail intermediate pieces (21), to fill in the gaps between the BUS mounting rails (20), depending on the motor size are of different lengths, the excess length of the BUS connecting lines (68) wave-shaped into the mounting rail intermediate pieces (21) inserted. Over the entire standard length the BUS mounting rails (20) are several BUS coupling points (44) evenly on the BUS line rails (18) distributed.
  • a signal evaluation unit (76) On the end of the last BUS mounting rail (20) existing coupling point (44) can be a signal evaluation unit (76), similar to a BUS coupler (31) his.
  • This signal evaluation unit (76) contains an electronic one Evaluation circuit, similar to the electronic converter system (17) the BUS coupler (31). From this signal evaluation unit (76) a connection line (77) is led out, which ends in a connector (78), which the forwarding of the signals to others, not shown electrical devices as well as the power supply for the electronic housed in the BUS mounting rails (20) Circuits for the BUS coupler (31) and the signal evaluation unit (76) enables.
  • the end of the BUS rail is an end piece (19), the is shown in Figures 3 and 15.
  • This connector (78) is in turn in a metal end plate (79) used in the frame groove (75) of a connecting element (71) instead at the outer end of a BUS mounting rail (20) the metal frame (73) is inserted.
  • the other end of the combination becomes the BUS mounting rails (20) with an end piece with a metal end plate (79), but without plug connection (78), completed.
  • the BUS line signals not evaluated within the mounting rail (20), but sent to an external evaluation unit. This is also via a connector (78) in the connected above, however the plug connection (78) by means of a BUS line rail coupler, similar (69) to the BUS line system (40) of the BUS line rail (18) is connected.
  • a further embodiment of the invention consists in other sensors that do not measure the oil mist density via the BUS system, consisting of the BUS mounting rails (20), the BUS cable rails (18), the DIN rail cover (64), the connecting element (71) and the connecting element (71) with metal end plate (79) and the BUS mounting bracket (22), the slotted hose lines (49) and the Collective channel (53) also for other sensors with fiber optic signal line or to use with copper wire.
  • the BUS mounting rail holder (22) as already with the oil mist monitoring system, on the sensor brackets be attached yourself.
  • the invention can also be used to accommodate the signal lines of the various sensors slotted hose lines (49) in specially designed guide channels with retaining tongues (51) can be used for the slotted hoses (49), which then in turn to be specially assembled on the engine in question are.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Claims (17)

  1. Dispositif pour la détermination de valeurs mesurées, plus particulièrement de concentration en aérosol, dans une chambre d'une machine produisant du travail au moyen d'une sonde de mesure (M) fixée au boítier (1) de la machine produisant du travail et pénétrant dans la chambre et qui est reliée par une ligne (L) à un dispositif d'exploitation disposé à l'extérieur du boítier (1), caractérisé en ce que la ligne (L) est reliée à un coupleur de bus (K) qui contient un convertisseur (17) et est disposé dans un rail de bus (S) pourvu d'un rail de ligne de bus (18) disposé dans un rail support (20) en vue de la transmission des données mesurées au dispositif d'exploitation, le rail de ligne de bus (18) étant disposé dans le rail support (20) avec une élasticité du type à ressort de façon à former avec le coupleur de bus (K) qui contient le convertisseur (17) un système vibrant accordé à basse fréquence.
  2. Dispositif selon la revendication 1, caractérisé en ce qu'un tube de guidage (2) est disposé sur le boítier en vue d'une insertion de la sonde de mesure (M) permettant le remplacement.
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que la sonde de mesure (M) est réalisée sous forme d'une sonde optique (10, 15,16) qui est reliée par un guide de lumière (L) au coupleur de bus (K), lequel est pourvu d'un convertisseur électronique (17) pour la conversion des signaux optiques en signaux électriques.
  4. Dispositif selon la revendication 3, caractérisé en ce que le coupleur de bus (K) est pourvu d'un émetteur de lumière (37) et d'un récepteur de lumière (38) reliés à la sonde (10,15, 16) par une ligne d'alimentation de lumière (12) et une ligne de retour de lumière (13).
  5. Dispositif selon une des revendications 1 à 4, caractérisé en ce que le coupleur de bus (K) est pourvu d'un bloc (26) en résine synthétique dans lequel les composants et la connexion de la ligne (L) sont surmoulés et qui est entouré d'un manchon de caoutchouc (30) duquel dépassent des connexions de contact (28) prévues pour la connexion à des contacts opposés (39) d'un rail de ligne de bus (18) du rail de bus (S).
  6. Dispositif selon la revendication 5, caractérisé en ce que le coupleur de bus (K) est pourvu, latéralement tout autour, d'un canal de bobinage (34) ainsi qu'en son sommet, de rainures de maintien (60) pour le logement de longueurs excédentaires du conducteur (L).
  7. Dispositif selon la revendication 5, caractérisé en ce que le coupleur de bus (K) est pourvu d'un profil denté (33) qui entoure les connexions de contact (28) pour rendre étanche au milieu la connexion au rail de ligne de bus (18), ainsi que de moyens de verrouillage (62) pour le verrouillage au rail de ligne de bus (18).
  8. Dispositif selon une des revendications 1 à 7, caractérisé en ce que le rail de bus (S) est pourvu d'un rail de ligne de bus (18) qui est équipé d'une carte de circuit imprimé (40) pourvue de connexions de contact (39) destinées au coupleur de bus (K) et est fixé à un rail en métal (41) pourvu d'un profil doué d'élasticité du type à ressort en forme de crochet (42) disposé en face du coupleur de bus (K) en vue du verrouillage au coupleur de bus (K) avec correspondance de forme.
  9. Dispositif selon la revendication 8, caractérisé en ce que la carte de circuit imprimé (40) et le rail en métal (41) sont entourés d'un manchon de caoutchouc (43) pourvu d'une ouverture (44) qui laisse libres les connexions de contact (39) et est de préférence pourvue en outre d'un profil denté (45) pour rendre étanche au milieu la connexion au coupleur de bus (K), ainsi que de moyens de verrouillage (63) pour le verrouillage au rail de ligne de bus (K).
  10. Dispositif selon la revendication 9, caractérisé en ce que le manchon de caoutchouc (43) est pourvu sur les deux grands côtés du rail de ligne de bus (18) de profils de fixation en caoutchouc (46) qui lui sont reliés par des liaisons élastiques en caoutchouc (48) et qui sont insérés dans des profils de fixation correspondants (47) prévus dans le rail support (20).
  11. Dispositif selon une des revendications 1 à 10, caractérisé en ce que le rail support (20) est clos au moyen d'un couvercle (64) qui recouvre le coupleur de bus (K) et de préférence peut s'ouvrir en pivotant.
  12. Dispositif selon une des revendications 1 à 11, caractérisé en ce que du côté de sortie du conducteur (L) et pour loger celui-ci le rail support (20) est pourvu d'un canal collecteur (53) en caoutchouc dans lequel le conducteur (L) est introduit à travers une fente (50) pour s'y diriger ensuite jusqu'au coupleur de bus (K).
  13. Dispositif selon une des revendications 1 à 12, caractérisé en ce que le rail support (20) est pourvue d'une rainure de réception en forme de T (25) dans laquelle est insérée une langue de fixation (24) d'un dispositif de maintien de rail support (22) qui est relié à un tube de guidage (2) qu'il y a lieu de relier au boítier.
  14. Dispositif selon une des revendications 1 à 13, caractérisé en ce que le conducteur (L) est guidé du rail de bus (S) à la sonde de mesure (M) au sein d'un tuyau (49) pourvu d'une fente longitudinale (50).
  15. Dispositif selon une des revendications 1 à 14, caractérisé en ce que le rail de bus (S) peut être relié à un autre rail de bus (S) au moyen d'une pièce intermédiaire (21) tandis qu'il est prévu une langue de connexion métallique (70) qui peut être glissée pour assurer la connexion mécanique dans les rails support (20,21) qu'il y a lieu de relier et à laquelle est assigné un élément de connexion (71) doué d'élasticité du type caoutchouc qui correspond, de préférence avec excès de taille, au profil intérieur du rail support (20) et à la pièce intermédiaire (21) et qui contient sur chacun de ses deux côtés un cadre respectif en métal (73) pourvu de langues de pincement (74) qui coopèrent par pincement avec des rainures de maintien (47) prévues dans les rails support (20,21).
  16. Dispositif selon une des revendications 1 à 15, caractérisé en ce que le rail de bus (S) est clos en chacune de ses extrémités au moyen d'une pièce terminale insérée dans le rail support (20) et qui contient un corps en caoutchouc ainsi qu'une plaque en métal (79) contenant des langues de pincement (74) qui coopèrent par pincement avec des rainures de maintien (47) prévues dans le rail support (20), la pièce terminale pouvant contenir à la demande une connexion à fiche (78) reliée par une ligne (77) à un coupleur de connexion de bus (76) inséré dans le rail de bus (S) de façon analogue au coupleur de bus (31) et relié au rail de ligne de bus (18).
  17. Dispositif selon une des revendications 1 à 16, caractérisé en ce que pour le relier à d'autres unités le rail de bus (S) est pourvu d'un coupleur de connexion de bus (69,76) inséré dans le rail support (20) de façon analogue au coupleur de bus (K) et relié au rail de ligne de bus (18), et d'une ligne de connexion (68,77).
EP97938726A 1996-09-13 1997-09-12 Procede de determination d'une valeur de mesure, notamment de la concentration d'un aerosol dans une chambre fermee d'une machine de travail Expired - Lifetime EP0925430B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH224496 1996-09-13
CH224496 1996-09-13
PCT/CH1997/000338 WO1998011331A1 (fr) 1996-09-13 1997-09-12 Procede de determination d'une valeur de mesure, notamment de la concentration d'un aerosol dans une chambre fermee d'une machine de travail

Publications (2)

Publication Number Publication Date
EP0925430A1 EP0925430A1 (fr) 1999-06-30
EP0925430B1 true EP0925430B1 (fr) 2002-06-12

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Country Status (9)

Country Link
US (1) US6137582A (fr)
EP (1) EP0925430B1 (fr)
JP (1) JP2001500206A (fr)
KR (1) KR20000036122A (fr)
CN (1) CN1085775C (fr)
DE (1) DE59707517D1 (fr)
NO (1) NO991241L (fr)
PL (1) PL332190A1 (fr)
WO (1) WO1998011331A1 (fr)

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WO2007140640A2 (fr) * 2006-06-02 2007-12-13 Schaller Automation Équipement et procédé pour déterminer des valeurs mesurées d'un aérosol pour une machine de travail
US7440121B2 (en) * 2006-09-20 2008-10-21 Lawrence Livermore National Security, Llc Optically measuring interior cavities
JP4633186B1 (ja) * 2009-10-02 2011-02-23 ダイハツディーゼル株式会社 オイルミスト濃度検出装置
KR101500013B1 (ko) * 2009-12-01 2015-03-09 현대자동차주식회사 오일 레벨 스위치와 크랭크 축 위치 센서용 일체형 커넥터
EP2386733A1 (fr) * 2010-05-14 2011-11-16 Schaller Automation Industrielle Automationstechnik GmbH & Co. KG Dispositif et procédé de détermination de valeurs de mesure de gaz et/ou d'un aérosol pour une machine
CN102042945B (zh) * 2010-11-03 2012-02-01 北京航空航天大学 一种测量密闭式齿轮箱油雾浓度的方法
US20120291535A1 (en) * 2011-05-20 2012-11-22 Caterpillar Inc. Oil mist detector test rig
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JP2001500206A (ja) 2001-01-09
CN1085775C (zh) 2002-05-29
PL332190A1 (en) 1999-08-30
NO991241D0 (no) 1999-03-12
KR20000036122A (ko) 2000-06-26
US6137582A (en) 2000-10-24
CN1230241A (zh) 1999-09-29
EP0925430A1 (fr) 1999-06-30
WO1998011331A1 (fr) 1998-03-19
NO991241L (no) 1999-05-12
DE59707517D1 (de) 2002-07-18

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