WO2006000494A1 - Membrantopf für einen ultraschallwandler - Google Patents
Membrantopf für einen ultraschallwandler Download PDFInfo
- Publication number
- WO2006000494A1 WO2006000494A1 PCT/EP2005/052008 EP2005052008W WO2006000494A1 WO 2006000494 A1 WO2006000494 A1 WO 2006000494A1 EP 2005052008 W EP2005052008 W EP 2005052008W WO 2006000494 A1 WO2006000494 A1 WO 2006000494A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- diaphragm
- membrane
- diaphragm pot
- layer
- pot
- Prior art date
Links
- 239000012528 membrane Substances 0.000 title claims abstract description 24
- 238000000576 coating method Methods 0.000 claims abstract description 15
- 239000011248 coating agent Substances 0.000 claims abstract description 13
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 12
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 10
- 229910052804 chromium Inorganic materials 0.000 claims description 10
- 239000011651 chromium Substances 0.000 claims description 10
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000009713 electroplating Methods 0.000 claims description 3
- 239000010410 layer Substances 0.000 claims 7
- 239000011247 coating layer Substances 0.000 claims 1
- 239000000463 material Substances 0.000 description 5
- 101100298222 Caenorhabditis elegans pot-1 gene Proteins 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 101100327917 Caenorhabditis elegans chup-1 gene Proteins 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
- G10K9/122—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using piezoelectric driving means
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
- G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings
- G10K9/20—Sounding members
Definitions
- the invention relates to a diaphragm pot for an ultrasonic transducer according to the preamble of the main claim.
- Ultrasonic sensors are already known, which are used for distance measurement between vehicles and obstacles.
- the sensors have a vibratable membrane, which is generally excited by a piezo element in resonance to a vibration.
- the sound signal generated thereby is emitted by the membrane of the ultrasonic sensor, reflected by an obstacle and collected again by the same or an adjacent ultrasonic sensor. From the runtime, the distance of the sensor to the obstacle can be determined.
- the piezoelectric element is arranged at the bottom of a diaphragm pot, which is e.g.
- the membrane pots are shaped such that they have a natural resonance in the range of the ultrasonic waves used. The resonance is determined by the dimensions and the vibration characteristics of the diaphragm cup, in particular by the layer thickness of the membrane.
- a metal in particular aluminum, or a ceramic material is preferably used. So that the sensors do not attract attention unnecessarily in the vehicle contour and thus the sensors can be protected against environmental influences, it is necessary to provide the sensors with appropriate coatings or paint to provide. Depending on the material, however, these layers can not be applied directly to the membrane pot. A variety of materials either does not sufficiently adhere or affect the sound propagation of the ultrasonic waves harmful. Depending on the layer thickness, the application may also lead to a change in the resonance frequency of the diaphragm cup as a whole, so that the diaphragm can no longer be excited to vibrate.
- An inventive diaphragm pot with the features of the main claim has the advantage that the membrane is provided at least on the outside of the diaphragm pot with a galvanic coating.
- a galvanic coating has the advantage that it combines firmly with the grand material of the diaphragm pot and is also applied in a uniform thickness. As a result, inhomogeneities and thus disturbances of the vibration behavior of the membrane can be prevented. As a result, it is possible to apply thinner, uniform layers compared with coatings.
- FIG. 1 shows a plan view of an open side of a diaphragm pot according to the invention
- FIG. 2 shows a cross section through a diaphragm pot according to the invention
- FIG. 3 shows a perspective view of a diaphragm pot according to the invention.
- the membrane pot according to the invention can be used for any applications.
- a use is advantageous for use in a motor vehicle, since on the one hand a high corrosion resistance to weathering and, e.g. salt must be present, while on the other hand, an acceptable appearance of the sensor is also required.
- the present invention will therefore be explained in the following to a diaphragm pot for use in a motor vehicle ultrasound system.
- the membrane 4 is designed substantially thinner than the walls 3 of the diaphragm pot, so that the sound generated by the piezoelectric element is transmitted only relatively weak as possible to the walls 3 of the diaphragm pot This is a sound transmission, which could interfere with other sensors are prevented.
- the walls 3 of the diaphragm pot 1 are provided with a peripheral groove 6, with which the diaphragm pot 1 can be inserted into a suitable holding unit.
- the membrane surface 4 is not circular, like the outer contour of the diaphragm pot, but has an almost rectangular basic structure.
- the piezoelectric element 5 is not shown in FIG. 1 and is preferably arranged centrally on the membrane 4. In the figure 2, a coating 7 of the diaphragm pot is indicated by a dashed line.
- the diaphragm pot 1 is formed of aluminum.
- a copper layer is first applied by electroplating, which has a thickness of at least 15 microns.
- a bright nickel layer having a thickness of about 10 ⁇ m and then a semi-bright nickel layer having a thickness of 30 ⁇ m are applied.
- These intermediate layers which serve to resist corrosion, are ultimately covered with a chromium coating, which is preferably made microporous.
- the thickness of the chromium coating is preferably 0.25 ⁇ m. Since the coating is carried out galvanically, this coating takes place before a further assembly of the sensor, in particular before an attachment of the piezoelectric element.
- the coated diaphragm pot Due to the stiffness of the deposited materials obtained in such a coating a frequency shift of the coated diaphragm pot against the uncoated diaphragm pot to higher resonance frequencies.
- the coated diaphragm pot therefore no longer has its original resonant frequency, which in one embodiment is 56 KHz, for example.
- the membrane thickness is reduced in such a way that the resonance of the uncleaned diaphragm cup in this case is reduced from 56 KHz to approximately 52 KHz. This ensures that the entire system, ie the coated diaphragm pot again the target frequency of 56 KHz achieved
- the chrome-plated sensor thus has the desired performance in the entire frequency range.
- the diaphragm pot has a diameter of preferably 15 mm
- the diaphragm pot has a height of about 10 mm.
- the membrane thickness is selected in a range of 0.61 to 0.63 mm. Compared to an uncoated sensor, the membrane thickness is reduced by about 1 mm.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Transducers For Ultrasonic Waves (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05743129A EP1763866B1 (de) | 2004-06-29 | 2005-05-03 | Verfahren zur herstellung eines membrantopfes für einen ultraschallwandler |
AT05743129T ATE445214T1 (de) | 2004-06-29 | 2005-05-03 | Verfahren zur herstellung eines membrantopfes für einen ultraschallwandler |
DE502005008282T DE502005008282D1 (de) | 2004-06-29 | 2005-05-03 | Verfahren zur herstellung eines membrantopfes für einen ultraschallwandler |
JP2007517233A JP4446000B2 (ja) | 2004-06-29 | 2005-05-03 | 超音波コンバータ用のダイヤフラムポット |
US11/630,484 US7570544B2 (en) | 2004-06-29 | 2005-05-03 | Diaphragm cup for an ultrasonic transducer |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004031310.5A DE102004031310B4 (de) | 2004-06-29 | 2004-06-29 | Membrantopf für einen Ultraschallwandler |
DE102004031310.5 | 2004-06-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006000494A1 true WO2006000494A1 (de) | 2006-01-05 |
Family
ID=34968097
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2005/052008 WO2006000494A1 (de) | 2004-06-29 | 2005-05-03 | Membrantopf für einen ultraschallwandler |
Country Status (8)
Country | Link |
---|---|
US (1) | US7570544B2 (de) |
EP (1) | EP1763866B1 (de) |
JP (1) | JP4446000B2 (de) |
CN (1) | CN100587802C (de) |
AT (1) | ATE445214T1 (de) |
DE (2) | DE102004031310B4 (de) |
ES (1) | ES2333803T3 (de) |
WO (1) | WO2006000494A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1796076A1 (de) * | 2005-12-10 | 2007-06-13 | Valeo Schalter und Sensoren GmbH | Verfahren zur Herstellung eines Ultraschallsensors |
US7570544B2 (en) * | 2004-06-29 | 2009-08-04 | Robert Bosch Gmbh | Diaphragm cup for an ultrasonic transducer |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006040344B4 (de) * | 2006-08-29 | 2022-09-29 | Robert Bosch Gmbh | Haltevorrichtung für einen Ultraschallwandler |
DE102006041975A1 (de) * | 2006-09-07 | 2008-03-27 | Hella Kgaa Hueck & Co. | Ultraschallsensor und Verfahren zur Herstellung eines Ultraschallsensors |
DE102006050037A1 (de) * | 2006-10-24 | 2008-04-30 | Robert Bosch Gmbh | Ultraschallwandler |
DE102009002983A1 (de) | 2009-05-11 | 2010-11-18 | Robert Bosch Gmbh | Membrantopf für einen Ultraschallwandler und Sensor damit |
DE102009034418A1 (de) * | 2009-07-23 | 2011-01-27 | Valeo Schalter Und Sensoren Gmbh | Membran und Verfahren zur Herstellung einer Membran für einen Ultraschallwandler |
DE102012200639A1 (de) * | 2012-01-17 | 2013-07-18 | Robert Bosch Gmbh | Ultraschallsensor |
DE102013109349A1 (de) * | 2013-08-29 | 2015-03-05 | Endress + Hauser Flowtec Ag | Ultraschallwandler und Ultraschall-Durchflussmessgerät |
DE102014207681A1 (de) * | 2014-04-24 | 2015-10-29 | Robert Bosch Gmbh | Membran für einen Ultraschallwandler und Ultraschallwandler |
FR3022674B1 (fr) * | 2014-06-18 | 2019-12-13 | Iem Sarl | Borne de detection comprenant un transducteur piezoelectrique fixe a une membrane liee a une structure de butee |
DE102016221542A1 (de) * | 2016-11-03 | 2018-05-03 | Robert Bosch Gmbh | Membrantopf für einen Ultraschallwandler und Ultraschallwandler |
DE102017202425A1 (de) | 2017-02-15 | 2018-08-16 | Robert Bosch Gmbh | Membrantropf für einen Ultraschallwandler, Verfahren zum Herstellen eines Membrantopfs und Ultraschallwandler |
DE102019123822A1 (de) | 2019-09-05 | 2021-03-11 | Valeo Schalter Und Sensoren Gmbh | Rechnerische Störschallkompensation für Ultraschallsensorsysteme |
EP4043641B1 (de) * | 2021-02-10 | 2024-03-20 | Vaisala, OYJ | Selbstnivellierender eingebetteter strassenoberflächensensor |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3638052A (en) * | 1969-09-22 | 1972-01-25 | Dynamics Corp America | Electroacoustic transducers of the bilaminar flexural vibrating type |
EP0802521A2 (de) * | 1996-04-16 | 1997-10-22 | Robert Bosch Gmbh | Sensor zum Senden und/oder Empfangen akustischer Signale |
WO2003045586A1 (en) * | 2001-11-30 | 2003-06-05 | Siemens Flow Instruments A/S | Ultrasonic transducer and method of joining an ultrasonic transducer |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3278409A (en) * | 1962-07-25 | 1966-10-11 | Gen Motors Corp | Electroplating machine |
US4388160A (en) * | 1980-02-20 | 1983-06-14 | Rynne George B | Zinc-nickel alloy electroplating process |
JPH0787636B2 (ja) * | 1988-05-10 | 1995-09-20 | パイオニア株式会社 | スピーカ用振動板 |
US5077677A (en) | 1989-06-12 | 1991-12-31 | Westinghouse Electric Corp. | Probabilistic inference gate |
JP3061269B1 (ja) * | 1999-02-16 | 2000-07-10 | ティーディーケイ株式会社 | 超音波健康・美容器用プロ―ブ |
DE10023065B4 (de) * | 2000-02-12 | 2006-03-02 | Volkswagen Ag | Ultraschallsensor für ein Kraftfahrzeug |
US6726631B2 (en) * | 2000-08-08 | 2004-04-27 | Ge Parallel Designs, Inc. | Frequency and amplitude apodization of transducers |
JP2003275684A (ja) * | 2002-03-26 | 2003-09-30 | Matsushita Electric Works Ltd | 超音波発生装置、及びこの超音波発生装置を用いた超音波美容器 |
DE102004031310B4 (de) * | 2004-06-29 | 2017-02-09 | Robert Bosch Gmbh | Membrantopf für einen Ultraschallwandler |
-
2004
- 2004-06-29 DE DE102004031310.5A patent/DE102004031310B4/de not_active Expired - Lifetime
-
2005
- 2005-05-03 JP JP2007517233A patent/JP4446000B2/ja active Active
- 2005-05-03 US US11/630,484 patent/US7570544B2/en active Active
- 2005-05-03 ES ES05743129T patent/ES2333803T3/es active Active
- 2005-05-03 AT AT05743129T patent/ATE445214T1/de not_active IP Right Cessation
- 2005-05-03 EP EP05743129A patent/EP1763866B1/de active Active
- 2005-05-03 WO PCT/EP2005/052008 patent/WO2006000494A1/de active Application Filing
- 2005-05-03 DE DE502005008282T patent/DE502005008282D1/de not_active Expired - Fee Related
- 2005-05-03 CN CN200580022016A patent/CN100587802C/zh active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3638052A (en) * | 1969-09-22 | 1972-01-25 | Dynamics Corp America | Electroacoustic transducers of the bilaminar flexural vibrating type |
EP0802521A2 (de) * | 1996-04-16 | 1997-10-22 | Robert Bosch Gmbh | Sensor zum Senden und/oder Empfangen akustischer Signale |
WO2003045586A1 (en) * | 2001-11-30 | 2003-06-05 | Siemens Flow Instruments A/S | Ultrasonic transducer and method of joining an ultrasonic transducer |
Non-Patent Citations (1)
Title |
---|
WONDRIS E F: "Surface coating", ENCYCLOPAEDIA BRITANNICA, 2005, XP002344583, Retrieved from the Internet <URL:http://search.eb.com/eb/article-81466> [retrieved on 20050913] * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7570544B2 (en) * | 2004-06-29 | 2009-08-04 | Robert Bosch Gmbh | Diaphragm cup for an ultrasonic transducer |
EP1796076A1 (de) * | 2005-12-10 | 2007-06-13 | Valeo Schalter und Sensoren GmbH | Verfahren zur Herstellung eines Ultraschallsensors |
Also Published As
Publication number | Publication date |
---|---|
CN100587802C (zh) | 2010-02-03 |
DE102004031310A1 (de) | 2006-01-19 |
CN1977307A (zh) | 2007-06-06 |
DE102004031310B4 (de) | 2017-02-09 |
US7570544B2 (en) | 2009-08-04 |
DE502005008282D1 (de) | 2009-11-19 |
EP1763866A1 (de) | 2007-03-21 |
US20080130416A1 (en) | 2008-06-05 |
ATE445214T1 (de) | 2009-10-15 |
JP2008504724A (ja) | 2008-02-14 |
JP4446000B2 (ja) | 2010-04-07 |
EP1763866B1 (de) | 2009-10-07 |
ES2333803T3 (es) | 2010-03-01 |
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