• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a pressure sensor (1), preferably for measuring hot, explosive media, having a substantially rotationally symmetrical sensor housing (2) which can be inserted into a measuring bore and accommodating a transducer (3) with a membrane element arranged on the pressure side of the sensor housing (2) (4), as well as to the sensor housing (2) electrically isolated signal lead (5). According to the invention, the sensor housing (2) is divided in the axial direction into a high-pressure region (H) and a low-pressure region (N), the high-pressure region (H) accommodating the measuring transducer (3) and defining a pressure-tight barrier (10) in contrast to the low-pressure region (N). has, which passes through the signal derivative (5) pressure-tight. With a diaphragm rupture, the escape of hot gases from the measuring range can thus be prevented.
    公开号:AT514607A4
    申请号:T50535/2013
    申请日:2013-08-30
    公开日:2015-02-15
    发明作者:Franz Dipl Ing Fh Steinbrugger；Martin Dipl Ing Baumgartner；Dietmar Dr Kröger
    申请人:Piezocryst Advanced Sensorics；
    IPC主号:
    专利说明:

    The invention relates to a pressure sensor, preferably for measuring hot, explosive media, with a substantially rotationally symmetrical, can be used in a measuring bore sensor housing accommodating a transducer with a pressure side arranged on the sensor housing membrane element, and with a sensor housing electrically isolated signal derivation.
    From EP 2 174 107 B1, in particular to FIG. 1, a pressure sensor is known, which has arranged in a housing, piezoelectric measuring elements of a transducer, which are biased between a membrane element and a housing base. The membrane element is welded to the pressure-side end of the housing.
    The piezoelectric measuring elements are located radially outside a biasing element arranged substantially along the entire sensor longitudinal axis, which biases the piezoelectric measuring elements against the housing base.
    The housing is designed in several parts, wherein the individual housing parts can be welded together after mounting the measuring elements.
    The piezoelectric measuring elements have an annular discharge electrode, and in the direction of the membrane element, an electrical insulating element, wherein an electrically conductive connection between the biasing member and the Ableitelektrode is made, so that the central biasing element is used for signal derivation. The biasing member is held by a fixing member in the biased position, wherein the fixing member may be screwed or welded to the central biasing member.
    The biasing element, which simultaneously serves the signal derivation, exits at the side opposite the membrane element of the sensor housing by an electrical insulating element, which may consist of ceramic.
    When using the sensor in the combustion chamber wall of an internal combustion engine, in the event of diaphragm rupture, i. upon destruction of the thin, annular membrane of the membrane element hot exhaust gases penetrate into the interior of the pressure sensor. In a prolonged action of the hot exhaust gases on the measuring elements they are destroyed, so that the biasing element can no longer be supported on the measuring elements and it is a relaxation of the
    Biasing element, as well as to a destruction of the insulating elements. This can result in the release of hot exhaust gases and flames from the combustion chamber.
    The object of the invention is to adapt a pressure sensor of the type described above for the measuring insert in critical temperature and pressure ranges that even in the event of damage (eg breakage of the membrane element), a discharge of hot, partially ignitable fluids (for example, hot gas / fuel mixtures ) is reliably prevented.
    This object is achieved in that the sensor housing is divided in the axial direction into a high pressure region and a low pressure region, wherein the high pressure region receives the transducer and in contrast to the low pressure region has a pressure-tight barrier, which passes through the signal discharge pressure-tight. If the membrane element breaks, the hot, explosive gases are effectively prevented by the pressure-tight barrier from exiting from the measuring location, for example the combustion chamber of an internal combustion engine or a gas turbine, in the measuring environment.
    In this case, the region of the sensor housing which is subjected to high pressure in the region of 60 to 500 bar, in particular 120 to 300 bar, when the membrane element breaks is considered as the high-pressure region.
    According to the invention, the pressure-tight barrier may have a charge dissipation enclosing sealing ring made of a heat-resistant, electrically insulating material, which is soldered, welded or glued into the pressure-tight barrier. However, it is also possible that the heat-resistant, electrically insulating sealing ring is pressed or shrunk into the pressure-tight barrier.
    The heat-resistant, electrically insulating sealing ring preferably consists of ceramic or sapphire.
    The invention will be explained in more detail below with reference to exemplary embodiments. Show it:
    Fig. 1 shows a pressure sensor according to the invention in a longitudinal section, as well
    Fig. 2 shows the detail II of Fig. 1 in an enlarged sectional view.
    The pressure sensor 1 according to the invention shown in FIGS. 1 and 2 has a substantially rotationally symmetrical sensor housing 2, which can be used in a measuring bore, not shown here, which accommodates a measuring transducer 3 in the interior, for example of piezoelectric measuring elements Sensor housing 2, a membrane element 4 is arranged.
    The sensor housing 2 is subdivided in the axial direction into a high-pressure region H and a low-pressure region N, wherein the high-pressure region H accommodates the transducer 3 and, in contrast to the low-pressure region N, has a pressure-tight barrier 10 which is penetrated by the signal derivative 5 electrically insulated from the sensor housing 2 in a pressure-tight manner , The pressure-tight barrier 10 is arranged in the illustrated embodiment in a region of the multi-part sensor housing 2, in which a front housing shell 15 is welded to a central housing shell 16.
    The piezoelectric transducer 3 is arranged here in a welded to the front housing shell 15 inner housing 18 and biased by a biasing element 7, which electrically contacts the signal lead 5 in the high pressure region H of the sensor housing 2. To the front of the pressure sensor 1 is completed with a tapered sensor cap 19, the measuring port 20, the flexible measuring range of the membrane element 4 is free.
    At a fraction of the membrane element 4 hot gases can reach high pressure of up to 500 bar in the front part of the sensor housing 2, which is limited by the front housing shell 15 and the inner housing 18, but by the pressure-tight barrier 10 at the exit from the Sensor housing prevented.
    The pressure-tight barrier 10 has a charge dissipation 5 enclosing sealing ring 11 made of a heat-resistant, electrically insulating material, which is soldered into the pressure-tight barrier 10, welded or glued. The heat-resistant, electrically insulating sealing ring 11 is preferably made of ceramic or sapphire and can also be pressed into the barrier 10 for producing a sealing seat or shrunk (by heat or cold treatment of the individual parts).
    According to the invention, the pressure-tight barrier 10 may have a sleeve 12 secured to the sensor housing 2, preferably welded into the sensor housing 2, with an inner flange 13 on which the charge lead 5 is supported with an outer flange 6 interposing the soldered sealing ring 11 made of ceramic or sapphire. On the charge discharge 5 in case of damage axially outwardly acting pressure forces are thus optimally supported.
    According to a preferred embodiment, the biasing element 7 and the signal lead 5 are coupled mechanically soft in the axial direction, wherein, for example, the signal lead 5 is formed in the contact region to the biasing member 7 as a tube spring 14. This means that the biasing element 7 can be pressed into the sensor housing at a fraction of the membrane element 4 and a subsequent destruction of the piezoelectric elements of the transducer 3, without destroying the sealing seat of the charge dissipation 5 in the pressure-tight barrier 10. In this case, for example, the tubular part 14 of the charge dissipation 5 with the voltage applied electrically insulated on the inner housing 18 clamping element 8 of the biasing member 7 may be electrically connected.
    In the low-pressure region N of the sensor housing 2, in which the normal atmospheric pressure (ambient pressure in the laboratory) prevails, is protected by the pressure-tight barrier 10, the charge dissipation 5 electrically contacting charge amplifier unit 9 is arranged.
    To the middle housing shell 16, which receives the charge amplifier unit 9, includes a rear housing shell 17, from which the multipolar connection cable 21 of the sensor exits.
    As a transducer 3 also piezorestriktive elements or strain gauges can be used.
    权利要求:
    Claims (10)
    [1]
    1. Pressure sensor (1), preferably for measuring hot, explosive media, with a substantially rotationally symmetrical sensor housing (2), which accommodates a measuring transducer (3), with a membrane element (2) arranged on the sensor housing (2). 4), as well as to the sensor housing (2) electrically insulated signal derivative (5), characterized in that the sensor housing (2) in the axial direction in a high pressure region (H) and a low pressure region (N) is divided, wherein the high pressure region (H ) receives the transducer (3) and in contrast to the low-pressure region (N) has a pressure-tight barrier (10), which passes through the signal derivative (5) pressure-tight.
    [2]
    Second pressure sensor (1) according to claim 1, characterized in that the pressure-tight barrier (10) has a charge dissipation (5) enclosing the sealing ring (11) made of a heat-resistant, electrically insulating material which is soldered into the pressure-tight barrier (10), welded or glued.
    [3]
    3. Pressure sensor (1) according to claim 1, characterized in that the pressure-tight barrier (10) has a charge dissipation (5) enclosing sealing ring (11) made of a heat-resistant, electrically insulating material which is pressed into the pressure-tight barrier (10) or shrunk is.
    [4]
    4. Pressure sensor (1) according to claim 2 or 3, characterized in that the heat-resistant, electrically insulating sealing ring (11) consists of ceramic or sapphire.
    [5]
    5. Pressure sensor (1) according to one of claims 1 to 4, characterized in that the high-pressure region (H) that region of the sensor housing (2), which at a fraction of the membrane element (4) at high pressure in the range of 60 to 500 bar , in particular 120 to 300 bar, is applied.
    [6]
    6. Pressure sensor (1) according to one of claims 2 to 5, characterized in that the pressure-tight barrier (10) attached to the sensor housing (2), preferably in the sensor housing (2) welded sleeve (12) having an inner flange (13). has, on which the charge dissipation (5) with an outer flange (6) with the interposition of the soldered sealing ring (11) is supported.
    [7]
    7. Pressure sensor (1) according to one of claims 1 to 6, characterized in that the transducer (3) has a biasing element (7), which electrically conducts the signal derivative (5) in the high pressure region (H) of the sensor housing (2).
    [8]
    8. Pressure sensor (1) according to claim 7, characterized in that the biasing element (7) and the signal lead (5) are mechanically soft coupled in the axial direction, for example, the signal derivative (5) in the contact region to the biasing member (7) as a bourdon tube ( 14) is formed.
    [9]
    9. pressure sensor (1) according to one of claims 1 to 8, characterized in that in the low pressure region (N) of the sensor housing (2), protected by the pressure-tight barrier (10), a charge dissipation (5) electrically contacting charge amplifier unit (9) is arranged.
    [10]
    10. Pressure sensor (1) according to one of claims 1 to 9, characterized in that the transducer (3) has a piezoelectric or piezorestriktives element or a strain gauge. 2013 08 30 Lu / Bt
    类似技术:
    公开号 | 公开日 | 专利标题
    AT503662B1|2007-12-15|GLOW PLUG WITH INTEGRATED PRESSURE SENSOR
    DE102008041712B4|2021-03-04|Glow plug with combustion pressure sensor
    DE4010609C2|1998-07-16|Spark plug with devices for temperature and pressure detection
    EP2174107B1|2010-10-27|Piezoelectric pressure sensor
    AT514607B1|2015-02-15|pressure sensor
    EP2087333B1|2011-08-17|Pressure sensor for measurements in hot, dynamic processes
    US8196459B2|2012-06-12|Spark plug incorporating a pressure sensor
    EP3124943A1|2017-02-01|Piezoelectric pressure sensor and method for producing said piezoelectric pressure sensor
    CH666127A5|1988-06-30|MEASURING VALVE FOR MEASURING HOT MEDIA AND METHOD FOR ITS ASSEMBLY.
    DE102004011097A1|2005-09-22|Device for detecting the combustion chamber pressure in an internal combustion engine
    EP3124944B1|2019-01-23|Piezoelectric pressure sensor
    DE102011077659A1|2012-04-12|Ceramic heater with heating element that generates heat when electricity is supplied
    AT523625A2|2021-09-15|Pressure sensor
    DE102014116760A1|2015-07-23|Pressure sensor with heat conducting element
    EP3176555A1|2017-06-07|Piezoelectric pressure sensor and process of manufacturing the same
    AT518650B1|2017-12-15|PIEZOELECTRIC PRESSURE SENSOR FOR MEASURING HIGH PRESSURE
    DE102009050911A1|2011-04-28|Cylinder pressure sensor
    EP3267171B1|2020-05-06|System with a combustion chamber of a combustion engine, a piezoelectric sensor and a protection device of the piezoelectric sensor
    EP3124945B1|2018-09-12|Piezoelectric pressure sensor
    DE102017117452A1|2018-02-22|Spark plug and method for its production
    US10270227B2|2019-04-23|Ignition plug
    AT514770B1|2015-05-15|Pressure sensor, preferably for use in hot dynamic processes
    EP3290888A1|2018-03-07|Pressure sensor for high operating temperatures
    同族专利:
    公开号 | 公开日
    EP2843385A1|2015-03-04|
    DE202014011489U1|2021-05-12|
    AT514607B1|2015-02-15|
    DK2843385T3|2018-06-06|
    EP2843385B1|2018-02-14|
    NO2843385T3|2018-07-14|
    KR20150026956A|2015-03-11|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE8802411U1|1988-02-24|1989-06-29|Keller Ag Fuer Druckmesstechnik, Winterthur, Ch|
    US5396803A|1993-07-07|1995-03-14|Tylan General, Inc.|Dual balanced capacitance manometers for suppressing vibration effects|
    DE19509188A1|1994-03-14|1995-09-21|Nippon Denso Co|Electronic piezo-resistive pressure sensor|
    DE19723615A1|1997-06-05|1998-12-10|Trw Automotive Electron & Comp|Pressure sensor unit, especially for automotive engineering|
    GB1054081A|1963-04-05|
    AT384676B|1983-07-07|1987-12-28|Avl Verbrennungskraft Messtech|MEASURING VALVE FOR MEASURING HOT MEDIA AND METHOD FOR MOUNTING A MEASURING PROCESSOR DESIGNED AS A PRESSURE GAUGE|
    JPH0694561A|1992-09-11|1994-04-05|Matsushita Electric Ind Co Ltd|Piezoelectric type pressure sensor|
    JPH0719981A|1993-06-01|1995-01-20|Nippondenso Co Ltd|High-temperature pressure sensor|
    AT505015B1|2007-07-27|2008-10-15|Piezocryst Advanced Sensorics|PRESSURE SENSOR|CN107631822B|2017-09-06|2019-09-27|西安近代化学研究所|A kind of body explosive loading bulbs of pressure simulated testing system and method|
    CN108414135B|2018-01-30|2019-02-26|哈尔滨工业大学|A kind of high temperature flow field device for pressure measurement of anti-leak|
    法律状态:
    2020-04-15| MM01| Lapse because of not paying annual fees|Effective date: 20190830 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50535/2013A|AT514607B1|2013-08-30|2013-08-30|pressure sensor|ATA50535/2013A| AT514607B1|2013-08-30|2013-08-30|pressure sensor|
    NO14180120A| NO2843385T3|2013-08-30|2014-08-07|
    DE202014011489.7U| DE202014011489U1|2013-08-30|2014-08-07|Pressure sensor|
    EP14180120.9A| EP2843385B1|2013-08-30|2014-08-07|Pressure sensor|
    ATA8008/2021A| AT523625A2|2013-08-30|2014-08-07|Pressure sensor|
    DK14180120.9T| DK2843385T3|2013-08-30|2014-08-07|Pressure sensor|
    KR20140113800A| KR20150026956A|2013-08-30|2014-08-29|Pressure sensor|
    [返回顶部]