EP1989524A1 - Dispositif de mesure de la pression - Google Patents

Dispositif de mesure de la pression

Info

Publication number
EP1989524A1
EP1989524A1 EP07703823A EP07703823A EP1989524A1 EP 1989524 A1 EP1989524 A1 EP 1989524A1 EP 07703823 A EP07703823 A EP 07703823A EP 07703823 A EP07703823 A EP 07703823A EP 1989524 A1 EP1989524 A1 EP 1989524A1
Authority
EP
European Patent Office
Prior art keywords
centering
recess
pressure sensor
pressure
measuring device
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.)
Ceased
Application number
EP07703823A
Other languages
German (de)
English (en)
Inventor
Christoph Kern
Steffen Schott
Pavlo Saltikov
Michael Kleindl
Reiko Zach
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1989524A1 publication Critical patent/EP1989524A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
    • G01L23/22—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines
    • G01L23/221—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines for detecting or indicating knocks in internal combustion engines
    • G01L23/222—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines for detecting or indicating knocks in internal combustion engines using piezoelectric devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
    • F23Q7/001—Glowing plugs for internal-combustion engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
    • F02P19/02—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs
    • F02P19/028—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs the glow plug being combined with or used as a sensor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
    • F23Q7/001—Glowing plugs for internal-combustion engines
    • F23Q2007/002—Glowing plugs for internal-combustion engines with sensing means

Definitions

  • the invention relates to a pressure measuring device for arrangement in a chamber of an internal combustion engine. Specifically, the invention relates to a Druckmessglühkerze for arrangement in a pre-vortex or combustion chamber of a luftverêtnden, self-igniting internal combustion engine.
  • the known Druckmessglühkerze has a plug body for insertion into a cylinder of the diesel engine.
  • the known pressure measuring glow plug has a heating element arranged in the plug body and a sensor arrangement.
  • the sensor arrangement is under a bias voltage between the plug body and a contact tube connected to the heating element, wherein a clamping element screwed to the contact tube is provided.
  • the sensor arrangement rests on the one hand on the clamping element and on the other hand on the plug body.
  • the sensor arrangement is used to measure a pressure in the combustion chamber of the cylinder, which is transmitted via the heating element and the contact tube.
  • the known Druckmessglühkerze a membrane, on the one hand with the plug body and on the other hand connected to the heating rod to seal the sensor assembly relative to the combustion chamber.
  • the pressure measuring device according to the invention with the features of claim 1 has the advantage that the assembly of the pressure measuring device simplified and in particular a pre-assembly of parts of the pressure measuring device is made possible.
  • the centering of the pressure measuring device has a centering on which the pressure sensor and optionally other components of the pressure measuring device applied, in particular plugged, can be.
  • the centering element thereby enables a pre-assembly of components that are used directly or indirectly for pressure measurement in the mounted pressure measuring device. If necessary, a functional check of such an intermediate product in the production of the pressure measuring device is possible, so that in relation to the pressure measurement possible sources of error before the final assembly of
  • Pressure measuring device can be detected. Further, the centering allows a centering of the applied to the centering components, in particular the pressure sensor, so that the final assembly of the pressure measuring device is facilitated. Furthermore, required clearances of gaps required for example in relation to the housing of the pressure measuring device for electrical insulation can be reliably maintained due to the centering and positioning ensured by the centering section of the centering element. The centering ensures this positioning and centering even during operation of the pressure measuring device, for example, when shocks occur or on the housing acting shocks.
  • a first contact plate which serves for electrically connecting a first measuring line to the pressure sensor and has a continuous recess
  • a second contact plate which serves for electrically connecting a second measuring line to the pressure sensor and a continuous recess has, and that the contact plates are joined together with the pressure sensor on the centering of the centering, wherein the pressure sensor between the contact plate is arranged.
  • Centering of the centering can be done as part of a pre-assembly. This preassembled intermediate product can then be used for final assembly in the housing of the pressure measuring device.
  • the centering section then ensures positioning, in particular centering, of the contact plates and of the pressure sensor in the housing of the pressure measuring device. In this case, if necessary, a defined annular gap between the pressure sensor and the contact plate can be ensured to the electrically conductive housing of the pressure measuring device, so that the operability of the pressure measuring device is ensured even after the occurrence of shock or shock to the housing.
  • the centering has one or more recesses into which engage the contact lugs of the contact pads to allow a rotationally secure positioning of the contact plates with respect to the centering of the centering and thus also with respect to the housing of the pressure measuring device. This also prevents twisting of electrical measuring leads, which are guided to the contact plates. In order to further reduce the influence of mechanical forces on the measuring lines, they can also be guided in the recesses of the centering section. This prevents a connection between a test lead and a contact tab of a contact pad or a junction within a test lead from breaking or otherwise being damaged due to mechanical stress.
  • the centering element has a continuous recess, which extends in particular through the centering section of the centering element, wherein a power line is guided in the continuous recess of the centering element through the centering element.
  • the electric fields that are caused by the current through the power line can be so far attenuated that the influence of the sensor signal of the pressure sensor is prevented or at least reduced.
  • a reliable pressure measurement is made possible even during the heating operation of the Druckmessglühkerze.
  • the continuous recess of the centering is formed as an inner and in relation to the existing or remaining wall thickness of the centering centrally arranged recess, so that the minimum of the wall thickness in the radial directions is a maximum, to an optimized shield in each to achieve radial direction.
  • one or more insulating elements can be provided.
  • an insulating element may be provided which electrically isolates one of the contact plates from the fixing element.
  • the centering element may consist of a ceramic with a high proportion of aluminum oxide.
  • the centering element may consist of an aluminum oxide or a mixture with aluminum oxide, in particular with more than 99% aluminum oxide.
  • the centering element also of a steatite, ie a material based on soapstone (protoenstatite, Mg (Si4O10) (OH) 2) exist.
  • Zirconium oxide in particular fully stabilized zirconium oxide (DSZ), partially stabilized zirconium oxide (PSZ) or polycrystalline tetragonal zirconium oxide (TZP), stabilizers such as magnesium oxide, calcium oxide or yttrium oxide can also be used as material for the centering element.
  • Another material for the centering element is zirconia-reinforced aluminum oxide (ZTA), wherein different mixtures with different proportions of zirconia and alumina can be selected.
  • Fig. 2 shows a detail of the pressure measuring device according to the embodiment of the invention in an exploded view
  • Fig. 3 shows a detail of the pressure measuring device of the embodiment of the invention from the designated in Fig. 2 with III viewing direction.
  • Fig. 1 shows a first embodiment of a pressure measuring device 1 in an axial sectional view.
  • the pressure measuring device 1 is designed as Druckmessglühkerze 1 for an air-compressing, self-igniting internal combustion engine.
  • a rod-shaped heating element 2 of the Druckmessglühkerze 1 projects in pre-and swirl chamber engines in the chamber of the internal combustion engine and in direct injection engines in a combustion chamber of the engine.
  • the pressure measuring glow plug 1 according to the invention is also suitable for other applications.
  • the pressure measuring device 1 can also be designed as Druckmesszündkerze or pressure gauge valve for mixture-compressing, spark-ignited internal combustion engines.
  • the pressure measuring glow plug 1 has a housing 3 with a sealing cone 4.
  • the rod-shaped heating element 2 is partially surrounded by a power transmission element 5 and connected thereto.
  • the rod-shaped heating element 2 forms together with the power transmission element 5 a radiator 6 of the Druckmessglühkerze 1.
  • the rod-shaped heating element 2 of the radiator 6 is connected by means of a contact element 7 with a formed as Glühstromtechnisch 8 power line 8.
  • the Glühstromtechnisch 8 is suitably connected to a controller or the like. Furthermore, that is
  • Power transmission element 5 of the radiator 6 is electrically or directly electrically connected to the housing 3, wherein via the housing 3 in the mounted state of the Druckmessglühkerze 1, a compound with electrical ground 9 can be produced.
  • Glühstrom Through the Glühstromstoff 8 relatively large currents, for example, of several amperes, to flow, in order to guide the energy required for heating the heating element 2 of the radiator 6 to the heating element 2.
  • a metal diaphragm 10 is provided, which is on the one hand connected to the force transmission element 5 and on the other hand with a sleeve 14, in particular a sensor cage 14.
  • the diameter of the metal membrane 10 in the region of the connection with the force transmission element is smaller than the diameter of the metal membrane 10 in the region of the connection with the sleeve 14, so that a bias of the metal membrane 10 in the axial direction, that is in the direction of an axis 15, possible is.
  • the sleeve 14 is connected in a suitable manner, for example by a weld, to the housing 3.
  • the Druckmessglühkerze 1 further comprises a arranged in an inner space 11 of the housing 3 fixing member 16 which is connected in a suitable manner, in particular by a weld, with the sleeve 14.
  • the power transmission element 5 of Radiator 6 has a collar 17, on which an annular end face 18 is provided.
  • a centering element 19 is supported, wherein an end face 20 of the centering element 19 partially rests against the end face 18 of the collar 17 ,
  • the centering element 19 has a centering section 21, which is shown in FIGS. 2 and 3.
  • a first contact plate 22, a pressure sensor 24, a second contact plate 23 and an insulating member 25 are successively plugged.
  • the pressure sensor 24 is thus surrounded by the contact plates 22, 23, wherein the insulating member 25, the second contact plate 23 with respect to the fixing element 16, which is formed of a conductive material, in particular a steel, electrically isolated.
  • the insulating member 25 is applied directly to the fixing member 16.
  • the pressure sensor 24 is operatively connected via the first contact plate 22 and a cylindrical part 26 of the centering element 19 to the force transmission element 5 of the heating element 6.
  • the pressure sensor 24 is supported on the fixing element 16 via the second contact plate 23 and the insulating element 25.
  • an example piezoelectric part of the pressure sensor 24 When the pressure sensor 24 is acted on by means of the force transmission element 5, an example piezoelectric part of the pressure sensor 24 generates a measuring charge which can be measured by means of measuring leads 28, 29 leading from the housing 3 to a suitable evaluation circuit.
  • the pressure sensor 24, the contact plates 22, 23, the insulating member 25 and the centering portion 21 of the centering element 19 are in the interior 11 of the Housing 3 is arranged, which is sealed from the chamber.
  • the fixing element 16 is connected to the sleeve 14, that a certain bias of the metal diaphragm 10 is specified in the unpressurized state.
  • a concern of the individual components within the Kraftpfads that is, in particular the cylindrical portion 26 of the centering element 19, the first contact plate 22, the pressure sensor 24, the second contact plate 23, the insulating member 25 and the fixing member 16 is reached , whereby hysteresis effects in the pressure measurement are prevented or at least reduced.
  • a guide element 30 is also provided in the interior of the housing 3.
  • Glühstrom grists are mechanically connected to the guide member 30.
  • the measuring lines 28, 29 and the Glühstrom réelle 8 are guided both by the centering element 19, as described in more detail with reference to FIGS. 2 and 3, as well as by the guide member 30 and positioned with respect to the housing 3. Therefore, a short circuit or damage to the measuring lines 28, 29 or the Glühstrom effet 8 is prevented even with shock or the occurrence of shocks to the housing 3.
  • the shaking resistance achieved by guiding the measuring lines 28, 29 also prevents the coupling of interference components into the measuring lines 28, 29, especially in the range of a few kilohertz.
  • the guide member 30 may have other functions.
  • the guide element 30 may have electronic components which convert the measurable via the measuring lines 28, 29 charge of the pressure sensor 24 in a suitable output signal.
  • the bolt-shaped centering element 19 has the cylindrical part 26 and the centering section 21.
  • the first contact plate 22, the pressure sensor 24, the second contact plate 23 and the insulating member 25 are successively added to the centering portion 21 of the centering element 19.
  • the Centering portion 21 of the centering element 19 has a first recess 35 and a second recess 36.
  • the first contact plate 22 is joined to the centering section 21 in such a way that a contact nose 37 of the first contact plate 22 is arranged in the first recess 35.
  • the contact nose 37 of the first contact plate 22 engages in the preassembled state into the first recess 35, so that an anti-twist device for the first contact plate 22 is formed.
  • An end section 38 of the measuring line 28 is connected, for example, by soldering or welding to the contact lug 37 of the first contact plate 22.
  • the second contact plate 23 is joined to the centering section 21 of the centering element 19 in such a way that a contact nose 39 of the second contact plate 23 engages in the second recess 36 of the centering section 21 in order to provide an anti-rotation lock for the second contact plate 23.
  • an end portion 40 of the measuring line 29 is connected to the contact lug 39 of the second contact plate 23 by welding or soldering.
  • the measuring lines 28, 29 extend through the first recess 35 and the second recess 36, respectively, so that the measuring lines 28, 29 are guided in the recesses 35, 36.
  • the contact plates 22, 23, the pressure sensor 24 and the insulating member 25 are positioned by attaching to the centering 21 of the centering 19, in particular fixed in the radial direction, so that specifically a contact between the contact plates 22, 23 and the pressure sensor 24 with the Sleeve 14 to prevent a short circuit to the housing 3 is prevented.
  • the first contact pad 22 has a continuous recess 41 through which the centering section 21 extends in the mounted state. Furthermore, the second contact plate 23 has a continuous recess through which the centering section 21 extends in the mounted state.
  • the pressure sensor 24 has a continuous recess 43 to the pressure sensor on the
  • the insulating member 25 also has a continuous recess 44, so that the insulating member 25 on the centering portion 21 of the centering element 19th can be applied.
  • Fig. 3 shows a partial representation of the Druckmessglühkerze 1 of the embodiment of the invention from the designated in Fig. 2 with III viewing direction.
  • the centering element 19 has a continuous recess 45, which extends through both the centering portion 21 and the cylindrical portion 26 of the centering element 19.
  • the continuous recess 45 is formed as an internal recess 45 and, with respect to the cross section of the centering section 21 shown in FIG. 3, arranged at least substantially centrally, in order to ensure the most uniform, all-round shielding of the glow current line 8 to reach. This prevents or at least reduces the influence on the electrical charge of the pressure sensor 24, which is measurable via the measuring lines 28, 29, of the electrical charge generated during the pressure measurement.
  • the centering element 19 is preferably formed from an electrically insulating material.
  • a ceramic with a high electrical resistivity is suitable in order to prevent a discharge of a charge from the piezoelectric pressure sensor 24.
  • the centering element 19 can be produced in one piece and therefore cost-effectively.
  • the centering element 19 can consist of high-alumina-containing ceramics or of an aluminum oxide, in particular with a composition of more than 99% of aluminum oxide.
  • a steatite based on soapstone protoenstatite, Mg (Si4O10) (OH) 2
  • a steatite based on soapstone protoenstatite, Mg (Si4O10) (OH) 2
  • the material may also be one or a combination of several zirconium oxides, in particular fully stabilized zirconium oxide, partially stabilized zirconium oxide or polycrystalline tetragonal zirconium oxide.
  • Stabilizers such as magnesium oxide, calcium oxide or yttrium oxide are advantageous for stabilizing the zirconium oxide.
  • the material used for the centering element 19 is also a zirconium oxide-reinforced aluminum oxide, wherein mixtures with different proportions of zirconium oxide and aluminum oxide are possible. These materials can also be combined with each other.
  • the described modular construction of the centering element 19 with the pressure sensor 24, the contact plates 22, 23 and the insulating allows a short overall axial length the pressure measuring module serving for pressure measurement, which also comprises the metal diaphragm 10, a part of the force transmission element 5, the sleeve 14 and the fixing element 16 in addition to these components.
  • the pressure measuring module serving for pressure measurement which also comprises the metal diaphragm 10, a part of the force transmission element 5, the sleeve 14 and the fixing element 16 in addition to these components.
  • disturbing natural frequencies of the pressure measuring module can be shifted in the direction of higher frequencies in order to achieve high reliability of the pressure measurement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

L'invention concerne un dispositif de mesure de la pression (1) destiné à être logé dans une chambre d'un moteur à combustion interne. Le dispositif de mesure de la pression (1) présente un boîtier (3), un élément de transfert de force (5) connecté en interaction avec un capteur de pression (24) et un élément de centrage (19). Le capteur de pression (24) et des plaquettes de contact (22, 23) sont assemblés sur une section de centrage (21) de l'élément de centrage (19) de manière à permettre un positionnement du capteur de pression (24) et des plaquettes de contact (22, 23) dans le boîtier (3) du dispositif de mesure de la pression (1). Le montage du dispositif de mesure de la pression (1) est ainsi simplifié et un prémontage est éventuellement rendu possible.
EP07703823A 2006-02-21 2007-01-12 Dispositif de mesure de la pression Ceased EP1989524A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006008350A DE102006008350A1 (de) 2006-02-21 2006-02-21 Druckmesseinrichtung
PCT/EP2007/050282 WO2007096205A1 (fr) 2006-02-21 2007-01-12 Dispositif de mesure de la pression

Publications (1)

Publication Number Publication Date
EP1989524A1 true EP1989524A1 (fr) 2008-11-12

Family

ID=37873169

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07703823A Ceased EP1989524A1 (fr) 2006-02-21 2007-01-12 Dispositif de mesure de la pression

Country Status (5)

Country Link
US (1) US20090314061A1 (fr)
EP (1) EP1989524A1 (fr)
JP (1) JP2009527748A (fr)
DE (1) DE102006008350A1 (fr)
WO (1) WO2007096205A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE102006057627A1 (de) * 2006-12-05 2008-06-12 Robert Bosch Gmbh Druckmesseinrichtung
DE102007044967A1 (de) * 2007-09-19 2009-04-02 Beru Ag Glühkerze mit verkokungsoptimiertem Design, spezielle Ringspaltausbildung
DE102007049971A1 (de) * 2007-10-18 2009-04-23 Robert Bosch Gmbh Glühstiftkerze
US8074502B2 (en) 2007-11-26 2011-12-13 Kistler Holding, Ag Part for measuring forces or pressures, and sensor comprising such a part
US8205490B2 (en) 2008-06-04 2012-06-26 Kistler Holding Ag Pressure sensor for measurements in a chamber of an internal combustion engine
FR2935796B1 (fr) * 2008-09-08 2010-10-22 Continental Automotive France Dispositif integrant un capteur de pression pour la mesure de pressions au sein d'un moteur a combustion interne ainsi qu'un corps d'un tel dispositif
DE102010025772A1 (de) * 2010-07-01 2012-01-05 Borgwarner Beru Systems Gmbh Drucksensor für eine Glühkerze
EP2469256B1 (fr) * 2010-12-22 2016-09-21 HIDRIA AET Druzba za proizvodnjo vzignih sistemov in elektronike d.o.o. Bougie de préchauffage dotée d'un capteur de charge et d'un lien blindé avec le capteur
DE102011007586A1 (de) * 2011-04-18 2012-10-18 Robert Bosch Gmbh Abdichtung für eine Heizvorrichtung, insbesondere für eine Glühkerze
DE102011017647A1 (de) * 2011-04-28 2012-10-31 Robert Bosch Gmbh Vorrichtung zur Erfassung eines Drucks, insbesondere eines Brennraumdrucks einer Brennkraftmaschine
DE102011017667A1 (de) * 2011-04-28 2012-10-31 Robert Bosch Gmbh Vorrichtung zur Erfassung eines Drucks, insbesondere eines Brennraumdrucks einer Brennkraftmaschine
JP5854638B2 (ja) * 2011-05-19 2016-02-09 株式会社ミクニ グロープラグ
DE102011054511B4 (de) * 2011-07-05 2013-08-29 Borgwarner Beru Systems Gmbh Glühkerze
DE102012202063A1 (de) * 2012-02-10 2013-08-14 Robert Bosch Gmbh Druckmesseinrichtung für einen Brennraumdrucksensor
DE102012209237A1 (de) 2012-05-31 2013-12-05 Robert Bosch Gmbh Druckmessglühkerze
EP2955441B1 (fr) * 2013-02-08 2018-06-06 Bosch Corporation Bougie de préchauffage equipée d'un capteur de pression
DE102013215860A1 (de) * 2013-08-12 2015-02-12 Robert Bosch Gmbh Sensormodul für Druckmessglühstiftkerze
US10253982B2 (en) * 2014-12-22 2019-04-09 Ngk Spark Plug Co., Ltd. Glow plug with pressure sensor
DE102016114929B4 (de) * 2016-08-11 2018-05-09 Borgwarner Ludwigsburg Gmbh Druckmessglühkerze
CN115452313B (zh) * 2022-11-14 2023-03-24 中国空气动力研究与发展中心高速空气动力研究所 一种声爆试验探针角度敏感性快速标定方法

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Also Published As

Publication number Publication date
WO2007096205A1 (fr) 2007-08-30
JP2009527748A (ja) 2009-07-30
DE102006008350A1 (de) 2007-08-30
US20090314061A1 (en) 2009-12-24

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