EP2312572A1 - Convertisseur ultrasonique - Google Patents

Convertisseur ultrasonique Download PDF

Info

Publication number: EP2312572A1
Authority: EP; European Patent Office
Prior art keywords: generator; circuit; ultrasonic transducer; piezoelectric vibrating; vibrating element
Prior art date: 2009-10-08
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.): Granted

Application number

EP10010954A

Other languages

German (de)

English (en)

Other versions

EP2312572B1 (fr

Inventor

Jürgen NIES

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.)

Valeo Schalter und Sensoren GmbH

Original Assignee

Valeo Schalter und Sensoren 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.)

2009-10-08

Filing date

2010-09-28

Publication date

2011-04-20

2010-09-28 Application filed by Valeo Schalter und Sensoren GmbH filed Critical Valeo Schalter und Sensoren GmbH

2011-04-20 Publication of EP2312572A1 publication Critical patent/EP2312572A1/fr

2012-09-19 Application granted granted Critical

2012-09-19 Publication of EP2312572B1 publication Critical patent/EP2312572B1/fr

Status Active legal-status Critical Current

2030-09-28 Anticipated expiration legal-status Critical

Images

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
- G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/0207—Driving circuits

Definitions

the invention relates to an ultrasonic transducer with a generator for generating the ultrasonic vibrations and an electrical circuit for adjusting the impedance of the generator to the impedance of a piezoelectric vibrating element, according to the preamble of claim 1.
ultrasonic transducers or sensors are well known.
each ultrasonic transducer emits an ultrasonic signal, which is reflected by a possible obstacle and can be received by ultrasonic sensors in the same ultrasonic transducer and or by other ultrasonic transducers or sensors.
a transformer with a parallel inductance with a defined transmission ratio is used.
the conventional design of this transformer with an iron-plated inductance makes it difficult to achieve a desirable flat design of the printed circuit board for the control electronics and thus of the complete ultrasonic transducer.
gyrator circuit can be used as an equivalent for an inductance for use in an impedance converter.
an inductance is virtually simulated with a semiconductor circuit connected with capacitors and resistors.
Such known gyrator circuits are used for example in the audio-frequency technology in equalizer circuits and sound controls.
an ultrasonic transducer As an object of the invention, it may be considered to optimize an ultrasonic transducer with respect to the mounting dimensions and at the same time to implement necessary circuitry measures.
an ultrasonic transducer with a generator for generating the ultrasonic vibrations and an electrical circuit for adjusting the impedance of the generator to the impedance of a piezoelectric vibrating element in the ultrasonic transducer according to the invention that for adapting the impedance of the generator to the piezoelectric vibrating element in the ultrasonic transducer in the electrical connection line between the generator and the piezoelectric vibrating element advantageously a Gyratorschab the generator and the piezoelectric vibrating element is connected in parallel as an impedance converter.
An advantageous application of the invention results when the ultrasonic transducer is part of an environment detection system for a parking assistance device in a vehicle.
the Gyratorsc preferably consists of a bipolar transistor, a FET (field effect transistor) or an operational amplifier, which is connected to its collector to the connecting line and its emitter grounded and thus parallel to the generator and the piezoelectric vibrating element and the base of the transistor from the connection point of an RC Series circuit activated which is also led from the connecting line to ground.
the preferred gyrator circuit is thus advantageously as a preferred embodiment, for example, a known bipolar transistor circuit in which the phase shift of the voltages between the control electrode (base) and the output (collector) is 180 °. If this gyrator circuit is then connected to a corresponding capacitance, then this circuit acts as an inductor and can then serve as a transformer.
this gyrator circuit can be used to generate a parallel resonant circuit together with the capacitance of the piezoelectric vibrating element of an ultrasonic transducer as a transformer without having to install an iron-core inductance.
FIG. 1 shows a drive circuit according to the invention for an ultrasonic transducer with a gyrator circuit as an impedance converter.
FIG. 1 is a drive circuit for an ultrasonic transducer can be seen, in which a generator G for generating the ultrasonic vibration, for example, in the range of 50 KHz works. Via a low-resistance resistor R7, the output signal of the generator G via a connecting line VL to a piezoelectric vibrating element PS as an essential part of the ultrasonic transducer, for example, for use in a parking assistance system in a vehicle out.
a generator G for generating the ultrasonic vibration for example, in the range of 50 KHz works.
a piezoelectric vibrating element PS as an essential part of the ultrasonic transducer
the iron-bonded inductance otherwise used in a conventional manner for a Transformer with a parallel inductance and with a defined transmission ratio replaced by a gyrator GS.
the gyrator circuit GS consists in the embodiment described here of a bipolar transistor Q1, which is connected to its collector directly to the connecting line VL and its emitter via a resistor R6 grounded and thus parallel to the generator G and the piezoelectric vibrating element PS.
the base of the transistor Q1 is driven via an RC series circuit of a resistor R5 and a capacitor C3, which is also led from the connecting line VL to ground.
This gyrator circuit GS thus causes the phase shift of the voltages between the control electrode (base) and the output (collector) is 180 °. If this gyrator circuit GS is then connected to a corresponding capacitance, in this case the capacitance of the piezoelectric oscillation element PS, then this circuit GS acts as an inductance and can then serve as a transformer.
the piezoelectric vibration element PS is characterized in a conventional manner by corresponding equivalent capacitances C1 and C2 and by an inductance L1 and a resistor R1.
a parallel circuit consisting of a high-resistance resistor R4 and a capacitor C4 is arranged for better simulation of the inductance for the transformer, which is also led from the connection line VL to ground.
circuits with a FET (field effect transistor) or an OP (operational amplifier) can be executed.

Landscapes

Engineering & Computer Science (AREA)
Physics & Mathematics (AREA)
Acoustics & Sound (AREA)
Multimedia (AREA)
Mechanical Engineering (AREA)
Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Transducers For Ultrasonic Waves (AREA)

EP20100010954 2009-10-08 2010-09-28 Convertisseur ultrasonique Active EP2312572B1 (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE102009048779A DE102009048779A1 (de)	2009-10-08	2009-10-08	Ultraschallwandler

Publications (2)

Publication Number	Publication Date
EP2312572A1 true EP2312572A1 (fr)	2011-04-20
EP2312572B1 EP2312572B1 (fr)	2012-09-19

Family

ID=43431839

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP20100010954 Active EP2312572B1 (fr)	2009-10-08	2010-09-28	Convertisseur ultrasonique

Country Status (2)

Country	Link
EP (1)	EP2312572B1 (fr)
DE (1)	DE102009048779A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO2013072167A1 (fr) *	2011-11-15	2013-05-23	Valeo Schalter Und Sensoren Gmbh	Transducteur ultrasonique et dispositif correspondant de détection de l'environnement dans un véhicule
EP3537177A1 (fr) *	2018-03-07	2019-09-11	ELMOS Semiconductor AG	Dispositif et procédé de commande sans transformateur d'un transducteur ultrasonore
CN114384526A (zh) *	2020-10-21	2022-04-22	咏业科技股份有限公司	超声波感测装置与组件

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE102012109035A1 (de)	2012-09-25	2014-03-27	Adolf Würth GmbH & Co. KG	Transformatorfreier Ultraschall-Generator für ein Handgerät
US11832523B2 (en)	2020-10-20	2023-11-28	Cirrus Logic Inc.	Driver circuitry comprising active inductor circuitry for driving piezoelectric transducers

Citations (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
CH493835A (de) *	1965-07-14	1970-07-15	Kistler Instr Corp	Mechanisch-elektrischer Umformer
DE3729731A1 (de) *	1986-09-30	1988-04-07	Toshiba Kawasaki Kk	Ultraschall-abbildungsgeraet mit impedanzwandler
EP0411473A2 (fr) *	1989-08-01	1991-02-06	Ferton Holding	Générateur à ultrason avec un transducteur piézo-électrique
DE69209358T2 (de)	1991-04-30	1996-10-31	Sanyo Electric Co	Schaltung für äquivalente Induktivität
JPH11169366A (ja) *	1997-12-15	1999-06-29	Toshiba Corp	超音波診断装置
DE10237721A1 (de)	2002-08-17	2004-02-26	Robert Bosch Gmbh	Sensoreinbauvorrichtung

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE10012519B4 (de) *	2000-03-15	2014-12-11	Sennheiser Electronic Gmbh & Co. Kg	Drahtlosmikrofon mit einem Mikrofonverstärker
DE102004026196A1 (de) *	2004-05-28	2005-12-29	Valeo Schalter Und Sensoren Gmbh	Verfahren, Vorrichtung und Sensormodul zum Messen des Abstandes zwischen einem Fahrzeug und einem Hindernis

2009
- 2009-10-08 DE DE102009048779A patent/DE102009048779A1/de not_active Withdrawn
2010
- 2010-09-28 EP EP20100010954 patent/EP2312572B1/fr active Active

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
CH493835A (de) *	1965-07-14	1970-07-15	Kistler Instr Corp	Mechanisch-elektrischer Umformer
DE3729731A1 (de) *	1986-09-30	1988-04-07	Toshiba Kawasaki Kk	Ultraschall-abbildungsgeraet mit impedanzwandler
EP0411473A2 (fr) *	1989-08-01	1991-02-06	Ferton Holding	Générateur à ultrason avec un transducteur piézo-électrique
DE69209358T2 (de)	1991-04-30	1996-10-31	Sanyo Electric Co	Schaltung für äquivalente Induktivität
JPH11169366A (ja) *	1997-12-15	1999-06-29	Toshiba Corp	超音波診断装置
DE10237721A1 (de)	2002-08-17	2004-02-26	Robert Bosch Gmbh	Sensoreinbauvorrichtung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO2013072167A1 (fr) *	2011-11-15	2013-05-23	Valeo Schalter Und Sensoren Gmbh	Transducteur ultrasonique et dispositif correspondant de détection de l'environnement dans un véhicule
EP3537177A1 (fr) *	2018-03-07	2019-09-11	ELMOS Semiconductor AG	Dispositif et procédé de commande sans transformateur d'un transducteur ultrasonore
CN110238016A (zh) *	2018-03-07	2019-09-17	艾尔默斯半导体股份公司	用于换能器的操作电路和操作方法
CN110238016B (zh) *	2018-03-07	2021-11-16	艾尔默斯半导体欧洲股份公司	用于换能器的操作电路和操作方法
CN114384526A (zh) *	2020-10-21	2022-04-22	咏业科技股份有限公司	超声波感测装置与组件

Also Published As

Publication number	Publication date
DE102009048779A1 (de)	2011-04-14
EP2312572B1 (fr)	2012-09-19

Publication	Publication Date	Title
EP2984503B1 (fr)	2018-08-08	Procédé de mesure par ultrason, notamment comme aide au stationnement pour véhicules, et systèmes de mesure par ultrason
EP2312572B1 (fr)	2012-09-19	Convertisseur ultrasonique
EP2780125B1 (fr)	2017-04-05	Transducteur ultrasonique et dispositif correspondant de surveillance de l'environnement d'un véhicule
WO2011141255A2 (fr)	2011-11-17	Procédé pour commander un capteur ultrasonore et capteur ultrasonore
EP2743725B1 (fr)	2015-08-19	Dispositif à ultrasons
WO2017140673A1 (fr)	2017-08-24	Système de mesure à ultrasons, en particulier pour la mesure de distances et/ou comme aide au stationnement pour des véhicules
WO2008064944A1 (fr)	2008-06-05	Agencement de circuits d'évaluation et/ou de commande de convertisseurs acoustiques
DE102006012394A1 (de)	2006-11-02	Halbleitervorrichtung und Vorrichtung zum Erfassen einer physikalischen Grösse
EP3095530B1 (fr)	2020-12-16	Dispositif d'envoi et de reception de signaux acoustiques
EP3004919B1 (fr)	2020-02-19	Dispositif émetteur-récepteur d'ultrasons
EP2880463B1 (fr)	2019-09-11	Procédé seervant à faire fonctionner un transducteur ultrasonore
EP0623395A1 (fr)	1994-11-09	Circuit pour atténuer d'un transducteur à ultrason
EP3423864B1 (fr)	2021-05-05	Dispositf de filtre pour filtrage d'une tension d'alimentation d'un capteur ultrasonore d'un véhicule, dispositif de capteur ultrasonore et véhicule
WO2007074005A1 (fr)	2007-07-05	Systeme de detecteur permettant de determiner une grandeur physique de mesure
EP3641133B1 (fr)	2024-09-11	Dispositif pilote
DE102005051119B3 (de)	2007-06-06	Ultraschalldurchflussmesser mit LC-Spannungserhöhung
DE102015109944A1 (de)	2016-12-22	Sensoranordnung für ein Kraftfahrzeug mit Ultraschallsensor und Spannungsversorgungsvorrichtung, Fahrerassistenzsystem sowie Kraftfahrzeug
EP2692451A2 (fr)	2014-02-05	Circuit électrique pour le fonctionnement d'une unité émettrice-réceptrice
DE102008025126B4 (de)	2016-08-11	Verfahren und Vorrichtung zum Betreiben eines Schallwandlers und Parksensor
DE102011076117B4 (de)	2021-10-14	Ultraschall-Messsystem und Verfahren zum Detektieren eines Hindernisses mittels Ultraschall
DE102010001154A1 (de)	2011-07-28	Vorrichtung und Verfahren zur Erzeugung eines Stromimpulses
DE102008025128B3 (de)	2010-01-14	Schaltungsanordnung mit einem Schallwandler und Parksensor
DE102022134930A1 (de)	2023-06-29	Schaltvorrichtung, ansteuervorrichtung, ultraschallsensor und fahrzeug
DE102019005905A1 (de)	2021-02-25	Messeinrichtung zur Ermittlung einer Fluidgröße
DE102020120698A1 (de)	2022-02-10	Kompensation eines Ultraschallwandlers mit veränderlicher Kompensationsinduktivität

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