WO2002021093A1 - Schwingungsaufnehmner zur mittelbaren oder unmittelbaren befestigung an einem schwingungen aufweisenden bauteil - Google Patents
Schwingungsaufnehmner zur mittelbaren oder unmittelbaren befestigung an einem schwingungen aufweisenden bauteil Download PDFInfo
- Publication number
- WO2002021093A1 WO2002021093A1 PCT/DE2001/003305 DE0103305W WO0221093A1 WO 2002021093 A1 WO2002021093 A1 WO 2002021093A1 DE 0103305 W DE0103305 W DE 0103305W WO 0221093 A1 WO0221093 A1 WO 0221093A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- vibration sensor
- extension
- spring element
- sensor according
- pressure sleeve
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
- G01H11/08—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means using piezoelectric devices
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/02872—Pressure
Definitions
- Vibration sensor for direct or indirect attachment to a component having vibrations
- the present invention relates to a vibration sensor for indirect or direct attachment to a component having vibrations according to the preamble of claim 1.
- Vibration sensors are used, for example, as knock sensors in internal combustion engines.
- a knock sensor is known from EP-01 84 666, which is shown in FIG.
- the knock sensor has a housing 2 and a pressure sleeve 3, on the outside of which a piezoceramic disk 4 and a seismic mass 5 acting thereon are arranged.
- the seismic mass 5 acts on the piezoceramic disk 4 via a plate spring 6.
- the preload of the plate spring 6 is generated by a threaded ring 7 screwed onto the pressure sleeve.
- the pressure sleeve 3 has an external thread 8.
- the piezoceramic disk 4 is between two contact disks 9 arranged, the contact disks 9 are connected by wires 10 to a cable 11.
- a vibration sensor is known from DE-195 24 152, which has bulges on the outside of the pressure sleeve, which serve as a stop for the plate spring.
- the curvatures are produced by caulking the material of the pressure sleeve.
- this can lead to inaccuracies in the pretensioning of the piezoceramic disk via the plate spring due to uneven caulking.
- the vibration transducer according to the invention for indirect or direct attachment to a component having vibrations with the features of claim 1 has the advantage that the annular spring element has an extension on its inner ring region and one in the pressure sleeve on the outside of the pressure sleeve Extension corresponding recess is formed.
- the recess receives the extension of the spring element in the assembled state.
- the spring element is held firmly in the recess of the pressure sleeve via its extension and can therefore exert a uniform and constant prestressing force on a seismic mass or a piezoelectric disk.
- the threaded ring for prestressing the spring element or other parts serving as a stop for the spring element can also be dispensed with.
- the vibration sensor according to the invention can also be produced particularly cost-effectively. Furthermore, there is also no risk that chips might fall into the space between the piezoelectric disk and the pressure sleeve, so that a short circuit could possibly occur.
- the spring element and the seismic mass are in one piece, i.e. as one part.
- the number of parts can be reduced, on the other hand assembly can be significantly simplified and assembly times can be reduced.
- the seismic mass is made of the same material as the spring element.
- a spring steel or the like be used.
- the seismic mass or the one-piece part in the assembled finished state has as flat a contact surface as possible for insulating disks or contact disks which are arranged between the seismic mass or the one-piece part and the piezoelectric disk
- Seismic mass or the one-piece part on the side facing the piezoelectric disk is designed to taper in the relaxed state. When installed, this side lies flat. Ie the seismic mass or the one-piece part bends like a plate spring, which is pressed flat on the "block".
- the extension preferably has at least one slope.
- the extension can be designed such that it
- the extension has a wedge shape. This makes it possible to get by with larger component tolerances for all individual parts forming the vibration sensor than in the prior art. This has a very favorable effect on the manufacturing costs.
- the slope is self-tensioning in the axial direction of the vibration sensor.
- the extension preferably has two bevels.
- the extension can be designed such that it forms a tip: 0, which can engage in a corresponding, V-shaped cut in the pressure sleeve.
- 5 elements preferably a wedge-shaped tip with an angle of about 15 ° to about 120 °. This reliably prevents the extension of the plate spring from falling out of the recess in the outer wall of the pressure sleeve.
- the angle is particularly preferably approximately 60 °.
- the spring element is additionally attached to the pressure sleeve by means of welding. So that is Disc spring fixed to the pressure sleeve by means of a welded connection. This can be done for example by means of a laser welding process or by means of a resistance welding process.
- welding the plate spring to the pressure sleeve it is also possible to further preload the plate spring by means of a radial and an axial Kraftko component.
- a continuous slot is preferably formed in the spring element and the seismic mass.
- this slot has the function of serving as a flow channel for the plastic of the housing, so that the plastic can easily reach the inner area between the pressure sleeve and the seismic mass or the piezoelectric disk.
- a spacer is preferably arranged in the slot before assembly in order to expand the parts so that they can be easily pushed onto the pressure sleeve.
- At least one groove is preferably formed in the side of the spring element facing away from the piezoelectric disk.
- This groove also serves as a flow channel for plastic, and any number of grooves can be formed.
- the grooves must be present if no continuous slot is formed in the spring element.
- a vibration sensor is thus provided which is inexpensive to manufacture and easy to assemble, an extension being formed on the spring element and being able to engage in a recess which is formed on the outside of the pressure sleeve. This allows the Extension of the spring element engage in the recess and is thus held in position.
- Figure 1 is a schematic sectional view of a vibration sensor according to a first embodiment of the present invention
- Figure 2 is a plan view of the plate spring shown in Figure 1;
- Figure 3 is a schematic sectional view of a vibration sensor according to a second embodiment of the present invention.
- Figure 4 is a sectional view of a vibration sensor according to the prior art.
- the vibration sensor 1 for indirect or direct attachment to a component having vibrations (not shown) according to a first exemplary embodiment of the present invention.
- the vibration sensor 1 according to the invention comprises a pressure sleeve 3, which has a flange-like edge at its lower end, which forms a contact surface 13 on the side facing the vibration component.
- the pressure sleeve 3 has a central bore 14, which serves to receive a fastening means in order to fasten the vibration sensor to the component having the rockers.
- the pressure sleeve has on its outside a cut-out V-shaped cutout 15, which is formed on the entire outer circumference of the pressure sleeve 3.
- the vibration sensor according to the first exemplary embodiment has a component 16 formed in one piece, which serves simultaneously as a seismic mass and as a spring element for prestressing the piezoelectric disk 4.
- the component 16 comprises a wedge-shaped extension 17, which is formed on the inner upper peripheral ring of the component 16.
- the wedge-shaped extension 17 engages in the recess 15 formed in the pressure sleeve 3.
- the component 16 is shown in dashed lines before assembly and in solid lines just before the final assembly position.
- the component 16 is moved in the direction of arrow A into the final assembly position.
- the inclined surfaces of the extension 17 lie directly in the inclined surfaces of the recess 15.
- the recess 15 serves as a stop for the extension 17 and thus determines the preload which acts on the piezoelectric disk 4.
- the underside of the one-piece component 16 lies flat on the insulating washer 12.
- the component 16 acts on the piezoelectric disk 4 via an insulating disk 12 and a contact disk 9.
- the piezoelectric disk 4 in turn is arranged adjacent to the flange-like extension of the pressure sleeve 3 via a contact disk 9 and an insulating disk 12.
- FIG. 2 shows a top view of the component 16 forming the spring element and the seismic mass.
- a continuous slot 18 is formed on the component 16.
- the extension 17 is not completely annular.
- two grooves 19 and 20 are provided on the upper region of the component 16.
- the grooves serve as flow channels for a plastic, which after the preassembly of the individual parts is injection molded around the preassembled individual parts as a housing (not shown), so that plastic can also get between the component 16 or the piezoelectric disk 4 and the cylindrical region of the pressure sleeve 3 can.
- the same function as the grooves 19 and 20 also has the slot 18, which forms a wide passage for the injection molded plastic.
- the slot 18 serves to simplify the pushing on of the component 16 via the pressure sleeve 3, since the component 16 can be expanded so easily and can be easily pushed onto the pressure sleeve 3.
- a spacer can preferably be arranged in the slot 18 prior to assembly in order to keep the component 16 in the expanded state.
- FIG. 3 shows a second exemplary embodiment according to the present invention.
- the same or similar parts are denoted by the same reference numerals as in the first embodiment and are therefore not described in detail below.
- the seismic mass 5 is in known manner designed as an annular disc.
- the plate spring 6 has an extension 17 on its inner circumferential area, which is wedge-shaped.
- the extension 17 has two inclined surfaces which engage in a cut-out V-shaped cutout 15 on the outside of the pressure sleeve 3 in the assembled state.
- the plate spring 6 exerts a prestress on the seismic mass 5 and the piezoelectric disk 4.
- the other components of the vibration sensor according to the second embodiment correspond to those of the first embodiment and are therefore not described further below.
- the component 16 or the plate spring 6 it is also possible for the component 16 or the plate spring 6 to be additionally fastened to the pressure sleeve 3 by means of a welded connection in order to increase the durability of the vibration sensor. This is indicated by the arrows B in FIG. 1. It is furthermore possible during the welding process to additionally pretension the component 16 or the spring element 6 by a radial and an axial force component.
- the present invention relates to a vibration sensor for indirect or direct attachment to a component having vibrations with a housing, a pressure sleeve 3 with a central bore 14 and one between two insulating washers 12 and two contacts.
- clock disks 9 arranged piezoelectric disk 4, on which a seismic mass 5 acts via a spring element 6.
- the spring element 6 is ring-shaped and has an extension 17 on its inner ring region.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002525461A JP2004508564A (ja) | 2000-09-08 | 2001-08-30 | 振動を有する構成部材に間接的又は直接に固定するための振動センサ |
| EP01971672A EP1322928A1 (de) | 2000-09-08 | 2001-08-30 | Schwingungsaufnehmner zur mittelbaren oder unmittelbaren befestigung an einem schwingungen aufweisenden bauteil |
| US10/129,830 US6868714B2 (en) | 2000-09-08 | 2001-08-30 | Vibration sensor for fixing directly or indirectly to a vibrating component |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10044476.8 | 2000-09-08 | ||
| DE10044476A DE10044476A1 (de) | 2000-09-08 | 2000-09-08 | Schwingungsaufnehmer zur mittelbaren oder unmittelbaren Befestigung an einem Schwingungen aufweisenden Bauteil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2002021093A1 true WO2002021093A1 (de) | 2002-03-14 |
Family
ID=7655525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE2001/003305 Ceased WO2002021093A1 (de) | 2000-09-08 | 2001-08-30 | Schwingungsaufnehmner zur mittelbaren oder unmittelbaren befestigung an einem schwingungen aufweisenden bauteil |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6868714B2 (de) |
| EP (1) | EP1322928A1 (de) |
| JP (1) | JP2004508564A (de) |
| DE (1) | DE10044476A1 (de) |
| WO (1) | WO2002021093A1 (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100451590C (zh) * | 2005-11-22 | 2009-01-14 | 三菱电机株式会社 | 爆震传感器 |
| CN110274678A (zh) * | 2018-03-13 | 2019-09-24 | 斯凯孚公司 | 间隔件和包括该间隔件的传感器模块 |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4209829B2 (ja) * | 2004-10-15 | 2009-01-14 | 三菱電機株式会社 | ノックセンサ及びその製造方法 |
| ATE466289T1 (de) * | 2005-01-26 | 2010-05-15 | Kistler Holding Ag | Masseisolierter piezoelektrischer sensor zur messung von beschleunigung oder druck |
| JP4162012B2 (ja) * | 2006-03-30 | 2008-10-08 | 三菱電機株式会社 | ノックセンサ |
| JP2013007612A (ja) * | 2011-06-23 | 2013-01-10 | Ngk Spark Plug Co Ltd | 非共振型ノッキングセンサ |
| JP6496354B2 (ja) * | 2016-06-14 | 2019-04-03 | 日本特殊陶業株式会社 | ノッキングセンサの製造方法 |
| GB2563930B (en) * | 2017-06-30 | 2020-02-19 | Delphi Tech Ip Ltd | Injector closed loop control |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5474616A (en) * | 1992-04-07 | 1995-12-12 | Fujitsu Limited | Method for rinsing plate-shaped articles |
| DE19524152C1 (de) * | 1995-07-03 | 1996-05-23 | Bosch Gmbh Robert | Schwingungsaufnehmer |
| DE19524147A1 (de) * | 1995-07-03 | 1997-01-09 | Bosch Gmbh Robert | Sensor mit Druckhülse |
| DE19612541A1 (de) * | 1996-03-29 | 1997-10-02 | Bosch Gmbh Robert | Schwingungsaufnehmer und Verfahren zu dessen Herstellung |
| JPH10267748A (ja) * | 1997-03-26 | 1998-10-09 | Unisia Jecs Corp | ノックセンサ |
| DE19829379A1 (de) * | 1998-07-01 | 2000-01-13 | Bosch Gmbh Robert | Schwingungsaufnehmer mit einer Druckhülse |
| JP2000249598A (ja) * | 1999-03-03 | 2000-09-14 | Denso Corp | ノックセンサ |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3445452A1 (de) | 1984-12-13 | 1986-06-19 | Robert Bosch Gmbh, 7000 Stuttgart | Klopfsensor |
| US4978883A (en) * | 1988-10-12 | 1990-12-18 | Mitsubishi Denki Kabushiki Kaisha | Vibration detecting device |
| DE4123786A1 (de) * | 1991-07-18 | 1993-01-21 | Bosch Gmbh Robert | Klopfsensor |
| CZ194096A3 (cs) * | 1995-07-03 | 1998-09-16 | Robert Bosch Gmbh | Snímač kmitání s přítlačným pouzdrem |
| FR2759458B1 (fr) * | 1997-02-13 | 1999-04-30 | Siemens Automotive Sa | Capteur accelerometrique de cliquetis et son procede de fabrication |
| DE19829409C2 (de) * | 1998-07-01 | 2003-11-13 | Bosch Gmbh Robert | Schwingungsaufnehmer mit einer Druckhülse |
| DE10009169B4 (de) * | 2000-02-26 | 2004-02-19 | Robert Bosch Gmbh | Schwingungsaufnehmer mit einer Druckhülse |
| US6779381B2 (en) * | 2001-07-06 | 2004-08-24 | Delphi Technologies, Inc. | Threadless knock sensor |
-
2000
- 2000-09-08 DE DE10044476A patent/DE10044476A1/de not_active Ceased
-
2001
- 2001-08-30 EP EP01971672A patent/EP1322928A1/de not_active Withdrawn
- 2001-08-30 US US10/129,830 patent/US6868714B2/en not_active Expired - Fee Related
- 2001-08-30 WO PCT/DE2001/003305 patent/WO2002021093A1/de not_active Ceased
- 2001-08-30 JP JP2002525461A patent/JP2004508564A/ja active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5474616A (en) * | 1992-04-07 | 1995-12-12 | Fujitsu Limited | Method for rinsing plate-shaped articles |
| DE19524152C1 (de) * | 1995-07-03 | 1996-05-23 | Bosch Gmbh Robert | Schwingungsaufnehmer |
| DE19524147A1 (de) * | 1995-07-03 | 1997-01-09 | Bosch Gmbh Robert | Sensor mit Druckhülse |
| DE19612541A1 (de) * | 1996-03-29 | 1997-10-02 | Bosch Gmbh Robert | Schwingungsaufnehmer und Verfahren zu dessen Herstellung |
| JPH10267748A (ja) * | 1997-03-26 | 1998-10-09 | Unisia Jecs Corp | ノックセンサ |
| DE19829379A1 (de) * | 1998-07-01 | 2000-01-13 | Bosch Gmbh Robert | Schwingungsaufnehmer mit einer Druckhülse |
| JP2000249598A (ja) * | 1999-03-03 | 2000-09-14 | Denso Corp | ノックセンサ |
Non-Patent Citations (2)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 1999, no. 01 29 January 1999 (1999-01-29) * |
| PATENT ABSTRACTS OF JAPAN vol. 2000, no. 12 3 January 2001 (2001-01-03) * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100451590C (zh) * | 2005-11-22 | 2009-01-14 | 三菱电机株式会社 | 爆震传感器 |
| CN110274678A (zh) * | 2018-03-13 | 2019-09-24 | 斯凯孚公司 | 间隔件和包括该间隔件的传感器模块 |
| CN110274678B (zh) * | 2018-03-13 | 2023-03-28 | 斯凯孚公司 | 间隔件和包括该间隔件的传感器模块 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10044476A1 (de) | 2002-04-04 |
| EP1322928A1 (de) | 2003-07-02 |
| JP2004508564A (ja) | 2004-03-18 |
| US20030056594A1 (en) | 2003-03-27 |
| US6868714B2 (en) | 2005-03-22 |
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