WO2020001893A1 - Dispositif et procédé de détection de bruit ambiant - Google Patents

Dispositif et procédé de détection de bruit ambiant Download PDF

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Publication number
WO2020001893A1
WO2020001893A1 PCT/EP2019/063592 EP2019063592W WO2020001893A1 WO 2020001893 A1 WO2020001893 A1 WO 2020001893A1 EP 2019063592 W EP2019063592 W EP 2019063592W WO 2020001893 A1 WO2020001893 A1 WO 2020001893A1
Authority
WO
WIPO (PCT)
Prior art keywords
vehicle
vibrations
housing
oscillating
sound waves
Prior art date
Application number
PCT/EP2019/063592
Other languages
German (de)
English (en)
Inventor
Vitali FRIBUS
Bernd Kernebeck
Jens Giesler
Original Assignee
Zf Friedrichshafen Ag
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 Zf Friedrichshafen Ag filed Critical Zf Friedrichshafen Ag
Publication of WO2020001893A1 publication Critical patent/WO2020001893A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/045—Plane diaphragms using the distributed mode principle, i.e. whereby the acoustic radiation is emanated from uniformly distributed free bending wave vibration induced in a stiff panel and not from pistonic motion

Definitions

  • the present invention relates to a device and a method for detecting ambient noise in the surroundings of a vehicle, a system for detecting a noise source in the surroundings of a vehicle, a roof fin for a vehicle and a vehicle.
  • acoustic data of the surroundings can be recorded in order to detect sources of danger and to support the driver in reacting to these sources of danger.
  • signals from emergency vehicles can be identified and an origin direction can be assigned in order to warn the driver of the vehicle and / or to initiate an evasive maneuver.
  • DE 10 2016 006 802 A1 discloses a device for detecting an optical and / or acoustic special signal emanating from an emergency vehicle.
  • the device can be arranged in a roof area of a vehicle.
  • driver assistance systems often requires complex changes to the design of the vehicle. For example, sensors have to meet specific position requirements and the vehicle body has to be changed to accommodate the sensors and corresponding driver assistance systems.
  • a specific challenge in the development of acoustic sensor arrangements is the protection against external (environmental) influences such as moisture (rainwater, high-pressure cleaners, etc.). However, this protection should at the same time have the lowest possible attenuation of the external acoustic signal.
  • the object of the present invention is to provide an approach for detecting ambient noise in an environment of a vehicle which is improved compared to the prior art.
  • reliable detection of noises should be made possible and at the same time a high level of robustness against external influences should be ensured.
  • the present invention relates in a first aspect to a device for detecting ambient noise in an environment of a vehicle, comprising:
  • a closed housing for attachment to an exterior of the vehicle, the housing having a plurality of outer surfaces, of which at least one outer surface is designed as an oscillating surface for oscillation as a result of excitation by sound waves from the surroundings;
  • a structure-borne sound transducer which is attached to the vibrating surface within the housing, in order to detect vibrations of the vibrating surface and to provide a vibration signal with information about the vibrations;
  • the present invention relates to a system for recognizing a noise source in an environment of a vehicle, comprising:
  • an evaluation unit for evaluating the vibration signals in order to determine a location and / or a type of noise source.
  • aspects of the invention relate to a roof fin for a vehicle and a vehicle with a device as described above or with a system such as previously described. Another aspect of the invention relates to a corresponding method.
  • the basic idea of the device according to the invention and of the method according to the invention is to enable acoustic signals to be recorded within a closed housing.
  • the acoustic signals i.e. the vibrations of the air
  • At least one outer surface is designed to be excited to vibrate by the sound waves (oscillating surfaces).
  • the vibrating surface swings.
  • the sound outside the housing can be detected in the interior of the housing by means of a structure-borne sound transducer in the interior of the housing, which is attached to the oscillating surface.
  • An oscillation signal is generated that includes information about the oscillation.
  • the vibration signal is forwarded via an interface. A statement regarding the source of the sound can be made in an evaluation unit based on the vibration signal.
  • the sound source is a potential source of danger, the spatial position of the sound source, how far the sound source is, etc.
  • the information determined by the evaluation unit can then be made available to a driver of the vehicle be provided and / or used within a driver assistance system. For example, a signal from a signal system of an emergency vehicle can be detected and a warning can be issued to the driver of the vehicle. Protection against external influences such as water, wind etc. is achieved by using a closed housing. It ensures that noises can be detected even when it is raining or the vehicle is moving. Impairment due to environmental influences is largely avoided. Long-term applicability is guaranteed.
  • the device according to the invention enables attachment to an exterior of a vehicle, so that the ambient sound can be perceived directly. It is not necessary for the sound to be conducted into an interior of the vehicle via a corresponding sound channel.
  • the device according to the invention enables retrofitting to a vehicle.
  • This enables simple retrofitting (retrofit solution). Costs can be saved.
  • a position on the roof fin of a car is preferably used or the device is integrated into a roof fin.
  • Corresponding connections for connecting a sensor arrangement to an electrical system or to a vehicle information or driver assistance system are usually already available at a position of a roof fin.
  • the position of a roof fin also allows noise to be detected from all directions around the vehicle, as there are only a few areas shaded by vehicle parts.
  • the use of a conventional microphone, in which the noises are diverted, is dispensed with. This ensures that no easily damaged parts are exposed to the environment. A higher robustness is achieved.
  • the oscillating surface comprises a first material and a further outer surface comprises a second material.
  • the first material is preferably softer than the second material.
  • the vibrating surfaces and the outer surfaces can therefore consist of different materials. A high level of sensitivity is ensured by using different materials.
  • a material can be used for the vibrating surfaces that is suitable for to be caused to vibrate by micro-vibrations generated by airborne sound.
  • a stable material can be used for the other outer surfaces.
  • a thickness of the oscillating surface is less than a thickness of the further outer surface and the oscillating surface preferably comprises the same material as the further outer surfaces.
  • the vibrating surfaces can be thinner than the other outer surfaces. This allows the vibrating surfaces to vibrate better than the other outer surfaces. Noises in the environment can be detected with increased sensitivity. In addition, simple production can be carried out since only a single material has to be processed.
  • the oscillating surfaces have a direction-dependent rigidity. Excitation by sound waves and / or vibrations from a first direction causes less vibration than excitation by sound waves and / or vibrations from a second direction.
  • a direction-dependent stiffness it can be achieved that sound from one direction is converted particularly well or less well into vibrations of the vibrating surface. For example, vibrations that come from the vehicle itself and should not be detected can be suppressed. Noises from your own vehicle are thus muffled. The sensitivity is increased. Ambient noise can be heard with minor disturbances.
  • the vibrating surface further advantageously comprises parallel ribs. Excitation by sound waves and / or vibrations from one direction substantially parallel to the ribs causes less vibration than excitation by sound waves and / or vibrations from another direction.
  • the direction-dependent stiffness can preferably be generated by using parallel ribs. Parallel ribs can in particular be caused by areas of alternating material strengths are generated. Noise from a direction that is substantially parallel to the ribs is attenuated. Noises from a direction that is oriented essentially orthogonally to the ribs lead to vibrations with unchanged intensity and can thus be perceived undamped.
  • a direction-dependent sensitivity of the sound sensor according to the invention is achieved.
  • the ribs run parallel to a vertical axis of the vehicle. Sound waves and / or vibrations from the direction of the vehicle are damped when the device is mounted on a roof of the vehicle.
  • the structure-borne noise transducer comprises a magnet and a coil and / or is designed as a microelectromechanical, MEMS, acceleration sensor.
  • MEMS microelectromechanical
  • At least one further outer surface is further advantageously designed as an oscillating surface.
  • the oscillating surfaces are also oriented in different directions with respect to a vertical axis of the vehicle when the housing is attached to the vehicle. If several outer surfaces are designed as oscillating surfaces, the direction-dependent noise detection is improved. It can be determined from which direction a noise is coming. In addition, further signal processing approaches are made possible. Ambient noise is understood here in particular to mean a temporally limited sound emission.
  • a structure-borne sound converter converts a movement or a vibration into an electrical voltage.
  • the vibration signal is understood in particular as a time-varying electrical voltage.
  • the outer and oscillating surfaces of a housing delimit an area within the housing from an environment.
  • An exterior of a vehicle is understood to mean in particular the outer skin of the vehicle.
  • a closed housing means in particular a water and windproof housing.
  • the housing or the device can be positioned in any position on the exterior of the vehicle.
  • the device can be arranged at the position of a roof antenna / roof fin or integrated into a roof antenna / roof fin.
  • Fig. 1 is a schematic representation of a vehicle according to the invention
  • FIG. 2 shows a schematic perspective illustration of a device according to the invention
  • FIG. 3 shows a schematic illustration of a system according to the invention in a vehicle according to the invention
  • FIG. 4 shows a schematic illustration of a further embodiment of a device according to the invention in a sectional view
  • FIG. 5 shows a schematic illustration of a further embodiment of a system according to the invention in a sectional view
  • Fig. 7 is a schematic representation of a method according to the invention.
  • a vehicle 10 according to the invention is shown schematically in FIG. 1.
  • the vehicle includes a device 12 for detecting ambient noise from a sound source 14 in the surroundings of the vehicle 10.
  • a siren of a passing emergency vehicle 16 can be detected as the sound source 14.
  • the device according to the invention makes it possible for situations or hazard sources to be recognized by evaluating acoustic emissions from a sound source 14 in an environment of vehicle 10.
  • the sound source 14 can be localized, that is, it can be determined from where the sound comes.
  • the received noise can be classified in order to classify the sound source 14, that is to say it can be determined what type of sound source 14 it is. For example, it can be determined that an emergency vehicle 16 with the siren switched on approaches its own vehicle 10 from behind. Learning algorithms such as neural networks can be used to classify and localize the sound source.
  • the device 12 is attached to an exterior of the vehicle 10.
  • the device is therefore installed in an unprotected area which is exposed to environmental influences.
  • the device 12 can be located on an outer skin of the vehicle 10.
  • the device 12 is attached to the roof of the vehicle 10.
  • a device 12 according to the invention is shown schematically in FIG. 2.
  • the device 12 comprises a closed housing 18, which is designed to be attached to an exterior of a vehicle.
  • the housing has a plurality of outer surfaces 20. At least one of the outer surfaces is designed as an oscillating surface 22.
  • a structure-borne sound transducer 24 is fastened to the vibrating surface, which is arranged within the housing and is thus protected against environmental influences.
  • the structure-borne noise transducer 24 provides a vibration signal with information about one Vibration of the vibrating surface 22 ready, which is made available via an interface 26 for further processing.
  • the housing 18 is designed to be closed.
  • the housing leaves no water and / or wind inside.
  • the housing can be designed as a plastic housing.
  • the housing 18 is suitable for attachment to an exterior of the vehicle.
  • the housing 18 has a corresponding connection point, by means of which screwing or other fastening to the outer skin of the vehicle is made possible. Because the housing 18 is closed, the further components of the device located therein are protected against environmental influences.
  • the housing has a plurality of outer surfaces 20 which, as shown in the perspective illustration, are oriented in different directions. At least one of these outer surfaces 20 is designed as an oscillating surface 22 or is used as an oscillating surface.
  • the oscillating surface 22 is made of a material and has properties that allow the oscillating surface 22 to be excited to oscillate by sound outside the housing. By using a plurality of oscillating surfaces 22, which are oriented in different directions, sound can be received and detected from different directions.
  • a structure-borne noise transducer 24 is attached to the oscillating surface 22 within the housing 18 and protected from environmental influences.
  • the structure-borne noise converter 24 corresponds in particular to an acceleration sensor.
  • the structure-borne sound transducer 24 is suitable for converting vibrations of the vibrating surface 22 into an electrical signal (vibration signal).
  • the vibrating surface 22 is therefore excited to vibrate by ambient noise and the vibration is detected.
  • the vibration signal therefore includes information about the ambient noise.
  • the structure-borne noise transducer 24 can be designed as a microelectromechanical (MEMS) sensor.
  • MEMS microelectromechanical
  • the structure-borne noise transducer transfers the vibration signal to an interface 26.
  • the structure-borne noise transducer 24 can additionally comprise a unit for preprocessing the signal.
  • the interface 26 can in particular be designed as a plug-in connection in order to pass on the vibration signal.
  • a plug connection to an electrical system of the vehicle can be provided.
  • the interface 26 can also be designed as a wireless interface or in another form.
  • the vibration signal can be processed further by forwarding the vibration signal to an evaluation unit.
  • FIG. 3 A system 28 according to the invention, which is integrated in a vehicle 10, is shown in FIG. 3.
  • the system 28 also includes an evaluation unit 30.
  • the evaluation unit 30 is arranged inside the vehicle 10.
  • the evaluation unit 30 can correspond to a central processing unit of the vehicle 10. It is also possible for the evaluation unit 30 to be implemented in software, the software being executed on a computing unit or on a control unit of the vehicle 10.
  • the evaluation unit 30 can determine, in particular, what kind of noise the detected noise is (identifying the sound source) and where the noise comes from (locating the sound source). On the basis of this information, for example, a driver assistance system can propose a decision to the driver of vehicle 10.
  • FIG. 4 shows a preferred embodiment of a device 12 'according to the invention.
  • the illustration is to be understood as a perspective sectional view in a plane orthogonal to a vertical axis 32 of the vehicle when the device 12 'is attached to the vehicle.
  • the housing 18 is octagonal.
  • the eight outer surfaces 20 are oriented in different directions when the device 12 'is attached to a vehicle.
  • the outer surfaces 20 of the housing 18 thus protrude into the room starting from a base plate 34 or base plate, the cover not being shown.
  • the device 12 'can therefore be mounted in particular on a roof of a vehicle. be brought.
  • the bottom plate 34 is then in contact with the outer skin of the vehicle on the roof.
  • a total of four outer surfaces 20 are designed as oscillating surfaces 22 and each provided with a structure-borne sound transducer 24.
  • the interface 26 is arranged on the base plate 34. The evaluation of the four provided vibration signals ensures that the sound source can be localized.
  • FIG. 5 schematically shows a further embodiment of a system 28 'according to the invention.
  • the perspective sectional view shown corresponds to the previous figure.
  • an evaluation unit 30 is provided inside the housing 18 in addition to the structure-borne sound transducers 24 and the interface 26.
  • the evaluation unit 30 can evaluate the vibration signals in order to determine information relating to the sound source. The information determined can then be forwarded to an on-board electrical system of the vehicle or to a corresponding control device of the vehicle. Because the structure-borne noise signals are evaluated within the housing 18, the system 28 'is suitable for retrofitting (retrofit solution). It is made possible that the system 28 'is subsequently attached to a vehicle.
  • a device 12 according to the invention together with the necessary evaluation is retrofitted on the vehicle, so to speak.
  • the device 12 according to the invention or the system 28 according to the invention is designed as a roof fin or is also integrated together in a roof fin with further functions. To retrofit a vehicle, it is then possible to replace the existing roof fin.
  • a single oscillating surface 22 is shown schematically in FIG. 6.
  • the vibrating surface 22 has ribs 36.
  • a ribbed structure can achieve that sound waves from one direction lead to lower vibration amplitudes than sound surfaces from another direction.
  • vibrations are damped from a direction that is substantially parallel to the direction of the ribs 36.
  • the vibrating surface 22 is oriented such that the ribs 36 are parallel to a vertical axis of the vehicle, vibrations, vibrations or sound emanating from the vehicle are damped. In this way, interference or noise can be suppressed.
  • the sensitivity to other sounds from the surroundings of the vehicle can be increased. Sound that comes from a direction that is perpendicular or substantially perpendicular to the ribs 36 is perceived better than vibrations or sound from one's own vehicle. It is also possible that the direction-dependent stiffness is realized in a different way.
  • Vibration surfaces made of a different material than the other outer surfaces 20 of the housing can be made of a different material than the other outer surfaces 20 of the housing.
  • the material of the oscillating surface 22 can be softer than the material of the other outer surfaces.
  • the oscillating surfaces 22 can be thinner than the further outer surfaces 20. By using a thinner material for the vibrating surfaces 22, these can be made to vibrate more easily, so that quieter noises can also be detected.
  • FIG. 7 schematically shows a method according to the invention for detecting ambient noise.
  • the method comprises the steps of attaching S10 a housing to an exterior of a vehicle, detecting S12 of vibrations of the vibrating surface, providing S14 of a vibrating signal and forwarding S16 of the vibrating signal to one Evaluation.
  • the method can in particular be partially implemented in software.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

La présente invention concerne un dispositif (12, 12') de détection de bruits ambiants dans l'environnement d'un véhicule (10), comprenant : - un boîtier fermé (18) destiné à être monté sur un côté extérieur du véhicule, le boîtier comportant une pluralité de surfaces extérieures (20), dont au moins une surface extérieure est formée comme surface oscillante (22) destinée à osciller en raison d'une excitation par des ondes sonores provenant de l'environnement;- un transducteur sonore à structure (24) monté dans le boîtier sur la surface oscillante pour détecter les oscillations de la surface oscillante et fournir un signal oscillant ayant des informations sur ces oscillations ; - une interface (26) pour transmettre le signal oscillatoire à un appareil d'évaluation (30) pour évaluer le signal oscillatoire. L'invention concerne également un procédé correspondant ainsi qu'un système (28, 28'), un véhicule (10) et un aileron pour un véhicule.
PCT/EP2019/063592 2018-06-27 2019-05-27 Dispositif et procédé de détection de bruit ambiant WO2020001893A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018210486.7A DE102018210486A1 (de) 2018-06-27 2018-06-27 Vorrichtung und Verfahren zum Erfassen von Umgebungsgeräuschen
DE102018210486.7 2018-06-27

Publications (1)

Publication Number Publication Date
WO2020001893A1 true WO2020001893A1 (fr) 2020-01-02

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PCT/EP2019/063592 WO2020001893A1 (fr) 2018-06-27 2019-05-27 Dispositif et procédé de détection de bruit ambiant

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WO (1) WO2020001893A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113432707A (zh) * 2021-06-24 2021-09-24 中科深兰(福建)环境科技有限责任公司 一种便于携带的噪声检测装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020112871A1 (de) 2020-05-12 2021-11-18 Bayerische Motoren Werke Aktiengesellschaft Kraftfahrzeug mit einer Akustikeinrichtung zum Erzeugen und Erfassen von Hörschall

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US20070288139A1 (en) * 2004-03-26 2007-12-13 Conti Temic Microelectronic Gmbh Vehicle Sensor for Detecting Impact Sound
US20120072078A1 (en) * 2010-09-17 2012-03-22 Keihin Corporation Collision determining apparatus for vehicle
US20150028721A1 (en) * 2012-03-30 2015-01-29 Kyocera Corporation Vibration device and portable terminal employing the same
DE102016006802A1 (de) 2016-06-03 2016-12-08 Daimler Ag Verfahren und Vorrichtung zur Erfassung zumindest eines von einem Einsatzfahrzeug ausgehenden Sondersignals

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Publication number Priority date Publication date Assignee Title
JP4513596B2 (ja) * 2004-08-25 2010-07-28 株式会社デンソー 超音波センサ
DE102011079707A1 (de) * 2011-07-25 2013-01-31 Robert Bosch Gmbh Verfahren und Vorrichtung zur Erfassung von Objekten aus der Fahrzeugumgebung eines Fahrzeuges
DE102017200385A1 (de) * 2017-01-11 2018-07-12 Robert Bosch Gmbh Kraftfahrzeug mit einer Vorrichtung zur luftschallakustischen Sensierung der Umgebung des Kraftfahrzeugs, Verfahren zur luftschallakustischen Sensierung der Umgebung eines Kraftfahrzeugs

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070288139A1 (en) * 2004-03-26 2007-12-13 Conti Temic Microelectronic Gmbh Vehicle Sensor for Detecting Impact Sound
US20120072078A1 (en) * 2010-09-17 2012-03-22 Keihin Corporation Collision determining apparatus for vehicle
US20150028721A1 (en) * 2012-03-30 2015-01-29 Kyocera Corporation Vibration device and portable terminal employing the same
DE102016006802A1 (de) 2016-06-03 2016-12-08 Daimler Ag Verfahren und Vorrichtung zur Erfassung zumindest eines von einem Einsatzfahrzeug ausgehenden Sondersignals

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113432707A (zh) * 2021-06-24 2021-09-24 中科深兰(福建)环境科技有限责任公司 一种便于携带的噪声检测装置

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