WO2020224904A1 - Dispositif pour détecter des bruits aériens pour des applications automobiles, où il existe des écoulements d'air entre le dispositif et une source sonore du bruit aérien, procédé de fabrication d'un dispositif de ce type et véhicule routier à commande automatisée comprenant un dispositif de ce type - Google Patents

Dispositif pour détecter des bruits aériens pour des applications automobiles, où il existe des écoulements d'air entre le dispositif et une source sonore du bruit aérien, procédé de fabrication d'un dispositif de ce type et véhicule routier à commande automatisée comprenant un dispositif de ce type Download PDF

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Publication number
WO2020224904A1
WO2020224904A1 PCT/EP2020/059969 EP2020059969W WO2020224904A1 WO 2020224904 A1 WO2020224904 A1 WO 2020224904A1 EP 2020059969 W EP2020059969 W EP 2020059969W WO 2020224904 A1 WO2020224904 A1 WO 2020224904A1
Authority
WO
WIPO (PCT)
Prior art keywords
aks
component
acoustic sensor
sound channel
circuit board
Prior art date
Application number
PCT/EP2020/059969
Other languages
German (de)
English (en)
Inventor
Jens Giesler
Matthias Gausmann
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
Priority to EP20719140.4A priority Critical patent/EP3963900A1/fr
Publication of WO2020224904A1 publication Critical patent/WO2020224904A1/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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/08—Mouthpieces; Microphones; Attachments therefor
    • H04R1/083—Special constructions of mouthpieces
    • H04R1/086—Protective screens, e.g. all weather or wind screens
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
    • H04R1/345—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means for loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/003—Mems transducers or their use
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/02—Details casings, cabinets or mounting therein for transducers covered by H04R1/02 but not provided for in any of its subgroups
    • H04R2201/029—Manufacturing aspects of enclosures transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2410/00—Microphones
    • H04R2410/07—Mechanical or electrical reduction of wind noise generated by wind passing a microphone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/13—Acoustic transducers and sound field adaptation in vehicles

Definitions

  • Air currents between the device and a sound source of the airborne sound are present, a method for producing such a device and an automated road vehicle which can be operated including such a device
  • the invention relates to a device for detecting airborne sound for automotive applications in which air currents are present between the device and a sound source of the airborne sound.
  • the invention also relates to a method for producing such a device.
  • the invention also relates to an automated road vehicle comprising such a device.
  • DE 10 2016 006 802 A1 discloses a method and a device for detecting at least one special signal emanating from an emergency vehicle.
  • a challenge in the development of such acoustic sensors is protection against ambient conditions, for example against external influences such as rainwater, and against flow conditions that are caused, for example, by wind, for example headwind. At the same time, however, this protection should have the lowest possible attenuation of the external acoustic signal.
  • the ambient conditions result on the one hand from the use of acoustic sensors in automotive applications, for example in road traffic.
  • the environmental conditions result from the installation locations of the acoustic sensors, which are located on moving and / or stationary, so-called open-air objects, for example on vehicles, exposed to the weather.
  • the object of the invention is to enable airborne sound detection and the conversion of airborne sound into processable signals under difficult environmental and flow conditions.
  • the device detects airborne sound for automotive applications in which air currents are present between the device and a sound source of the airborne sound.
  • the device solves the task through system properties from the specific coordination of individual components of the device with one another.
  • the device comprises an acoustic sensor as components.
  • the device also includes a protective grille to protect the device against the ingress of coarser foreign bodies.
  • the protective grille comprises at least one opening for an inlet of the airborne sound into the device. The opening is arranged axially offset to an axial axis of the device.
  • the device comprises an acoustically permeable, hydrophobic and / or lipophobic first membrane. The first membrane is arranged behind the protective grille in the air flow direction.
  • the device comprises a flow bypass.
  • the flow bypass runs between the protective grille and the first membrane.
  • the flow bypass leads fluids and / or foreign bodies that have entered the device through the air flow away from the first membrane and out of the device.
  • the device also comprises a sound channel arranged parallel to the axial axis, at one end of which the first membrane is arranged in the air flow direction and at the second end of which the acoustic sensor is arranged.
  • the sound channel is protected against the effects of moisture and foreign bodies by the first membrane.
  • the diameter, length, volume, shape and / or material properties of the sound channel are adapted in order to dampen the natural modes of the device.
  • the device comprises a circuit board.
  • the circuit board includes components and their connections for preprocessing analog or digital signals from the acoustic sensor.
  • the components are designed for analog or digital signal processing and / or for realizing filter functions, functions for phase reversal, compressor functions and / or amplifier functions.
  • the circuit board holds the acoustic sensor on one side of the circuit board.
  • the acoustic sensor is arranged on the rear side of the circuit board in the direction of air flow.
  • the acoustic sensor has its sound inlet opening on the component mounting side of the printed circuit board and the printed circuit board comprises a printed circuit board opening for the sound inlet.
  • the acoustic sensor is arranged on the front side of the circuit board in the air flow direction. In this case, the acoustic sensor has its sound inlet opening on the side of the acoustic sensor opposite the component mounting side of the Lei terplatte.
  • the special feature of the device according to the invention compared to known microphones is the functionality and airborne sound detection and its conversion under difficult environmental and flow conditions that exist in automotive applications. For example, while a road vehicle is in motion, a speed-dependent air flow and thus relative air flows between a sound source, for example a siren of an emergency vehicle or a pedestrian, and the device arise.
  • the device according to the invention is distinguished by the detection of airborne sound and its conversion in the event of relative air currents.
  • the above-mentioned environmental conditions also result from the intended use in automotive applications and from the previously described installation locations of the device where relative air currents arise.
  • airborne sound can be detected and converted into electrical signals in a temperature range from -50 ° C to + 90 ° C, for example -30 ° C to + 70 ° C.
  • the device according to the invention is characterized in that the individual components of the device, for example the acoustic sensor, the protective grille, the opening for the air sound inlet, i.e. the sound inlet opening, the first membrane, the flow bypass and the sound channel, taking air into account - And / or body noise, aeroacoustics, flow and fluid dynamics, electronics and mechanics are coordinated with one another.
  • the device represents a housing for the acoustic sensor.
  • the term acoustic sensor designates both the acoustic sensor as a component of the device and the entire device.
  • An acoustic sensor is a sensor that detects mechanical vibrations, for example caused by airborne sound waves, and converts them into a processable signal, for example an electrical signal such as an electrical voltage.
  • the acoustic sensor includes an analog and / or digital signal output.
  • the forming takes place in two stages. In a first acoustic-mechanical conversion stage, the airborne sound is converted into the movement of an object according to a certain reception principle. In the second mechanical-electrical conversion stage, the movement of the object is converted into the electrical signal according to a specific converter principle.
  • Examples of acoustic sensors are an arrangement of a magnet and an electrical coil, microphones, accelerometers, piezo sensors or strain gauges.
  • MEMS mechanical system
  • acoustic sensor comprising an arrangement of semiconductor elements that absorb vibrations
  • the protective grille is a grille with a mechanical protective function.
  • the protective grille is constructed in such a way that coarse foreign bodies, i.e. particles with diameters of, for example, at least 2 mm, for example dirt particles such as
  • Mud particles, dust particles, soot particles, grains of salt, stones, insects or other particles contained in the air cannot penetrate the device.
  • the opening for the air inlet is positioned in the protective grille in such a way that no direct jet and / or particle flow acts on the first membrane in the axial sensor direction.
  • the first membrane is thus mechanically protected by the arrangement and / or geometry of the opening.
  • the opening or openings are essentially 2 mm wide and essentially 5 mm long.
  • the first membrane is permeable to airborne sound waves. Due to the hydrophobic and / or lipophobic behavior, the sound channel is protected against immission by, for example, moisture and particles.
  • the first membrane is a microporous membrane.
  • a membrane with 1.3 ⁇ 10 9 pores / cm 2 for example, is microporous.
  • Such a membrane is particularly waterproof and enables protection at least according to IPX4K.
  • the first membrane is designed to enable protection according to IP69K.
  • the number 6 in IP69K means complete tightness and thus protection against the ingress of solid objects and dust. 9K denotes protection against the ingress of water during high pressure or steam jet cleaning. This is particularly advantageous for protection in automotive applications.
  • IP International Protection
  • the degree of protection indicates the suitability of components for various environmental conditions.
  • the protected systems are divided into corresponding types of protection, so-called International Protection, abbreviated to IP codes.
  • IP codes The ISO 20653: 2013 road vehicles standard - Protection classes (IP code) - Protection against foreign objects, water and contact - Electrical equipment describes the status of road vehicles.
  • IPX6K offers protection against strong water jets under increased pressure, specifically for road vehicles.
  • Air flow direction means air flow direction through the device or air flow direction relative to the road vehicle on which the device is built.
  • the roles of the first end of the sound channel and the second end of the sound channel are interchanged when the device is installed in the rear, in which the protective grille is open against the forward direction of travel of the road vehicle.
  • the flow bypass ensures that fluids that have entered through the air inlet, for example water, air, and small particles such as dirt and / or dust, do not agglomerate on the acoustically permeable membrane, but rather again through an opening at the outlet of the flow bypass for an air outlet be conveyed out of the device.
  • the flow bypass is a self-cleaning flow bypass.
  • the flow bypass is designed acoustically, flow-acoustically and flow-dynamically in such a way that the aeroacoustic sound generated by the flow is reduced and the flow-dynamic forces do not negatively affect the subsequent acoustically permeable membrane, for example damage or degrade it.
  • the sound channel is used for the targeted sound guidance of the airborne sound waves to the acoustic sensor.
  • the sound channel is specially dimensioned acoustically so that no or only a few and weak eigenmodes develop in the usable frequency range of the acoustic sensor. This targeted dimensioning is essentially based on geometric parameters such as diameter, length, volume and shape.
  • the circuit board is also called a printed circuit board.
  • the components of the circuit board include, for example, logic modules such as ASICS or FPGAs.
  • one component implements a high-pass filter that allows airborne sound waves with frequencies greater than 300 Hz to pass.
  • the dynamic range of a signal is limited by means of compressor functions.
  • the components are, for example, mounted directly on the surface of the printed circuit board, for example soldered, and they are also called surface mounted devices, abbreviated to SMD.
  • the circuit board opening corresponds to a hole or a through-hole on the circuit board for the airborne sound to enter the acoustic sensor, which is arranged on the rear side of the circuit board in the direction of air flow.
  • the lower side of the circuit board in the air flow direction is the surface of the circuit board on which the components and the acoustic sensor are arranged.
  • the front side of the circuit board in the air flow direction is the surface of the circuit board on which the components and the acoustic sensor are arranged.
  • the acoustic sensor comprises a microphone.
  • the microphone comprises a microphone capsule and a transducer.
  • the acoustic-mechanical conversion takes place in the microphone capsule.
  • the microphone capsule includes, for example, a membrane that is excited to vibrate by airborne sound.
  • the mechanical-electrical conversion takes place in the converter.
  • the transducer is, for example, an electrodynamic transducer, such as in the case of a moving coil microphone, or an electrostatic transducer, such as in the case of a condenser microphone.
  • the acoustic sensor is implemented as a MEMS microphone.
  • MEMS microphones are miniaturized microphones which, for example, use SMD technology for direct use on the circuit board.
  • MEMS microphones have small dimensions and are easy to process industrially. For example, MEMS microphones can be assembled in a reflow soldering process. Compared to other microphones, MEMS microphones are less sensitive to high temperatures and are therefore particularly suitable for automotive applications.
  • the acoustic sensor is an electret condenser microphone.
  • the shape and / or material properties of the protective grille are adapted to protect the first membrane, the sound channel and / or the acoustic sensor against dynamic flow and / or static forces that arise, for example, from the wind or the weather.
  • the protective grille and the openings in the protective grille are designed to be rotationally symmetrical, for example.
  • the protective grille is taken for example from a plastic and is shaped in such a way, that is, has such a geometry, in order to offer a scope of protection of at least IPX6K. A mechanical protective effect of the device is thus achieved and the acoustic sensor is protected against such influences.
  • the protective grille comprises an open-pore material, for example a foam material such as an open-pore polyurethane foam material.
  • Wind and / or water absorption can be set by scalable size of pores in the material.
  • Foam materials are characterized by a very low density and easy processing and processing. Foams are particularly easy to manufacture from polyurethane.
  • Open-pore polyurethane foam is also called filter foam. Filter foam is particularly suitable for wind absorption. Filter foam is classified according to pore size / number of pores. The unit is the number of pores per inch, abbreviated PPL.
  • the protective grille comprises a filter foam in the range from 10 to 80 PPL According to a further aspect of the invention, the protective grille is an exchangeable protective grille in order to be replaced in the event of coarse contamination without having to replace the entire device.
  • a shape and / or material properties of the flow bypass are adapted in order to dampen the aeroacoustic sound generated by the air flow through the flow bypass and / or to protect the first membrane against dynamic flow and / or static forces.
  • the flow bypass is shaped in such a way that, if possible, there are no edges or similar shapes in the flow bypass where flow breaks and / or flow turbulences can occur. Flow breaks and / or flow turbulences generate aeroacoustic noise.
  • the susceptibility to flow breaks and / or flow turbulence is greatly reduced, as is the generation of aero-acoustic noise. This is particularly advantageous in the case of relative air currents, for example while the device is moving when driving a road vehicle.
  • the sound channel is open at one of its ends and closed at the other end with a closure element with a reflection factor.
  • Open means open to sound entry.
  • a flow resistance of the sound channel can be set as a function of the reflection factor.
  • the closing element is the acoustic sensor, for example the microphone, or the circuit board.
  • the sound channel has essentially the shape of a cylinder, a truncated cone or a horn part and the first membrane is at the first end of the sound channel with a larger first area and the acoustic sensor at the second end of the sound channel with a smaller second area Area arranged.
  • a horn part or also called a funnel is a robust system for high-tem- sensitive detection of airborne sound waves.
  • a sound channel in the form of a horn part couples the receiver acoustically particularly well to the sound field, so that as much of the externally entering sound energy as possible arrives at the receiver. In this way, minimal acoustic damping of the sound energy flow is achieved.
  • the sound channel and the flow bypass are implemented by an inflow component.
  • the inflow component includes a bulge.
  • the bulge comprises a cavity which is continuous in the axial axis and through which the sound channel is implemented.
  • the inflow component is brought together with the protective grille in such a way that the flow bypass is implemented by a free space between the inflow component and the protective grille. This means that the flow bypass runs between the protective grille and the inflow component.
  • the inflow component and its bulge are shaped in such a way that the aeroacoustic sound generated by the air flow through the flow bypass is attenuated.
  • the inflow component and its bulge do not include any flow separation edges in the flow bypass.
  • the device comprises a housing in which the circuit board is arranged.
  • the housing protects the circuit board and its components from mechanical and / or thermal influences.
  • the housing comprises fastening means, for example screws, in order to fasten the housing and the device to a control unit or to a road vehicle.
  • the circuit board is arranged perpendicular or parallel to the axial axis of the device.
  • the second end of the sound channel is arranged in a radial extension of a jacket surface of the sound channel.
  • the acoustic sensor for example the microphone and / or the microphone capsule, is coupled to the sound channel parallel to the axial axis of the device.
  • the acoustic sensor is coupled to the sound channel perpendicular to the axial axis of the device, that is to say tangentially.
  • the circuit board comprises a connector for connecting the device to an electronic control unit.
  • the control device is designed to localize and / or classify the sound source as a function of the signals from the acoustic sensor.
  • the electronic control device is, for example, a control device that is only in active connection with the device. This means that the control unit only receives signals from the acoustic sensor and evaluates them.
  • the control device executes, for example, an intelligent algorithm, such as an artificial neural network trained in noise localization and / or classification.
  • the evaluated signals are forwarded via an on-board network of a road vehicle to further control units of the road vehicle, for example ADAS or AD Domain ECUs, or to actuators of the road vehicle.
  • the device is connected to a CAN bus or an Ethernet bus of the road vehicle.
  • the device comprises an elastic sealing component for coupling the acoustic sensor to the sound channel and / or to the circuit board.
  • the sealing component compensates for geometrical tolerances when assembling the device.
  • the elasticity ensures a defined decoupling of the acoustic sensor, including the microphone capsule, and / or the circuit board, from structure-borne sound. Furthermore, the elasticity ensures an acoustically closed connection between the sound channel and the microphone capsule.
  • the device comprises a decoupling component for vibration damping and / or for structure-borne noise decoupling.
  • the decoupling component is arranged at a coupling point between the device and a component into which the device can be installed and / or which can mechanically hold the device.
  • the decoupling component is made of a two-component material that generates an acoustically and / or vibrationally we kenden impedance jump.
  • the two-component material comprises a relatively soft material with a relatively small impedance and a relatively hard material with a relatively large impedance.
  • the soft material is arranged in front of the hard material in the direction of air flow.
  • the impedance jump is over the entire te contact surface of the protective grille and the decoupling component carried out.
  • the decoupling component is, for example, a molded part.
  • the protective grille and the decoupling component form one component.
  • the protective grille and the decoupling component are formed from an injection molded part.
  • the decoupling component is made of vibration-damping materials of different densities, for example from mixed-row polyurethane foams.
  • the decoupling component has, for example, a high mechanical load capacity and / or good insulating properties. By means of the component, the device is insensitive to vibrations, durable and therefore particularly well suited for automotive applications.
  • the device comprises a second membrane for venting the device.
  • the second membrane provides static pressure compensation for the device.
  • the wind generated when driving exerts a pressure on the device, for example on the acoustic sensor.
  • the proportional static pressure is compensated for by the second membrane.
  • the second membrane prevents condensation from forming in the device.
  • the method according to the invention for producing a device according to the invention comprises the following method steps:
  • an acoustic sensor according to the invention is coupled to a circuit board according to the invention
  • the acoustic sensor is coupled by means of the sealing component to a second end of a sound channel according to the invention with a smaller second surface of an inflow component according to the invention
  • a first membrane according to the invention is arranged at a first end of the sound channel with a larger second surface
  • a protective grille according to the invention is used in a decoupling component according to the invention, • the upstream component is brought together with the decoupling component to form a flow bypass according to the invention, and
  • the housing for the acoustic sensor obtained after the preceding method steps is set in a component according to the invention into which the housing can be installed and / or from which the housing is mechanically durable.
  • the acoustic sensor is coupled to the rear side of the circuit board in the direction of air flow, which is the surface of the circuit board on which the electronic components are arranged.
  • the circuit board is arranged perpendicularly or parallel to the axial axis of the device. In the parallel arrangement of the circuit board, the second end of the sound channel is arranged in a radial extension of the lateral surface of the sound channel.
  • the housing is mounted relative to a forward direction of travel from the rear in a front bumper of the road vehicle or from the front in a rear bumper.
  • the protective grille and the decoupling component are produced and provided as a molded part, for example as an injection-molded part.
  • Another aspect of the invention is a device produced by the method according to the invention.
  • the method according to the invention it is possible to install the housing, in particular the housing according to the invention, directly in / on the road vehicle during vehicle manufacture.
  • the method advantageously also allows an efficient retrofitting of an existing vehicle with the housing according to the invention, in particular with the housing according to the invention in which the acoustic sensors are integrated.
  • the invention thus also provides an assembly of retrofit solutions.
  • the housing is preassembled according to the method steps and arranged as a finished housing on the road vehicle.
  • the housing is installed from the rear in a front bumper of the road vehicle or from the front in a rear bumper relative to a forward direction of travel.
  • the road vehicle according to the invention which can be operated automatically, comprises a device according to the invention or an arrangement of several such devices or a device manufactured according to the method according to the invention.
  • the device is integrated into an outer side of the road vehicle by means of a component according to the invention into which the device can be built and / or the device can be mechanically retained from this.
  • the device is connected for signaling purposes by means of a plug connection according to the invention with an ADAS or AD Domain ECU of the road vehicle.
  • the arrangement comprises four devices arranged next to one another.
  • Such an arrangement is surprisingly very well suited for recording noise and is relatively easy to obtain.
  • the road vehicle is, for example, a passenger or truck or a passenger transport system such as a people mover.
  • the road vehicle includes technical equipment for self-driving, that is to say driverless or fully automated, autonomous ferry operation.
  • the ADAS which means advanced driver assistance system, or the AD, which means autonomous driving
  • main ECU which means electronic control unit, perceives the vehicle's surroundings by means of surroundings detection sensors, derives trajectory planning from it and determines the corresponding control signals, the vehicle actuators are provided to regulate the longitudinal and / or lateral guidance of the road vehicle.
  • the acoustic sensor of the device according to the invention is an example of a stiierfas sensor.
  • Further surroundings detection sensors are, for example, optical Sen sensors, for example cameras or lidar, or radar sensors. According to one aspect of the invention, the signals from the acoustic sensor with signals from other surroundings The detection sensors merged to locate and / or classify objects in traffic.
  • the component comprises fastening means in order to fasten the device to the road vehicle.
  • the device is installed from behind in the front bumper of the road vehicle or from the front in the rear bumper relative to the forward direction of travel. This means that the device can be retrofitted to existing road vehicles as a retrofit solution.
  • the device is permanently installed in the outside of the road vehicle, for example in its body.
  • a first arrangement of the devices in a front left area of the road vehicle, a second arrangement of the devices in a front right area of the road vehicle, a third arrangement of the devices in a rear left area of the road vehicle and / or a fourth arrangement of the devices is arranged in a rear right area of the road vehicle.
  • the arrangement corresponds to a specific positioning. This arrangement with four arrangements enables a 360 ° detection of ambient noise.
  • the arrangements each comprise four devices arranged next to one another.
  • the device is integrated into a static object of a traffic infrastructure, for example in a traffic light pole or a building, by means of the component according to the invention into which the device can be installed and / or from which the device is mechanically durable.
  • Fig. 1 is an isometric sectional view of an embodiment of a device according to the invention
  • FIG. 2 is a side sectional view of the exemplary embodiment from FIG. 1
  • FIG. 3 shows an exploded view of the exemplary embodiment from FIG.
  • Fig. 4 is a sectional view of a further embodiment of a device according to the invention.
  • FIG. 5 shows a side sectional view of the exemplary embodiment from FIG. 4,
  • FIG. 6 is a three-dimensional view of the exemplary embodiment from FIG. 4,
  • FIG. 9 shows an exemplary embodiment of an outside of the road vehicle from FIG. 8.
  • a circuit board L is arranged perpendicular to an axial axis A of the device AKS in a device according to the invention AKS.
  • the circuit board is arranged parallel to the axial axis A of the device AKS.
  • a second end E2 of a sound channel 7 is arranged in a radial extension of a lateral surface of the sound channel 7.
  • the device AKS comprises a component B.
  • the component B holds the device AKS in an outside K of a road vehicle F, see FIG. 9.
  • the component B is, for example, an injection molded part or an additive process, for example a 3D printing process , manufactured component.
  • the outside K of the road vehicle F is, for example, part of a body of the road vehicle F, for example a bumper.
  • the bumper is a front bumper or a rear bumper.
  • the component B comprises a circular opening.
  • Component B is only shown in FIGS. 1, 2 and 3.
  • the devices shown in FIGS. 4, 5 and 6 can also include component B.
  • a protective grating according to the invention ter 2 is used.
  • the protective grille 2 is coupled to component B by means of a decoupling component 1 1 according to the invention, see FIGS. 1, 2 and 3.
  • the protective grille 2 and the decoupling component 1 1 are made from an injection molded part. 1, 2 and 3, the protective grille 2 comprises four symmetrically arranged slit-shaped openings 3a, 3b, 3c and 3d.
  • the openings 3a, 3b, 3c and 3d are inlet openings for airborne sound waves into the device AKS, as are the openings 3a, 3b and 3c in FIGS. 4, 5 and 6.
  • the airborne sound waves enter the device AKS in the air flow direction R.
  • the openings 3a, 3b, 3c and 3d are arranged axially offset to an axial axis A of the device AKS.
  • the exploded view in Fig. 3 shows the openings 3a, 3b, 3c and 3d, the protective grille 2 and the decoupling component 11 in a merged state.
  • an inflow component 8 is inserted into the decoupling component 11.
  • the inflow component 8 comprises a rotationally symmetrical bulge 9.
  • the inflow component 8 is inserted in such a way that a free space remains between the inflow component 8, its bulge 9 and the protective grille 2.
  • the free space forms a flow bypass 6 according to the invention.
  • the flow bypass 6 comprises air outlets 6a. The air is let out of the AKS device through the air outlets.
  • the bulge 9 of the inflow component 8 comprises a continuous cavity H.
  • the cavity H has the shape of a horn part with a larger first area at a first end E1 of the cavity H and a smaller second area at a second end E2.
  • the first and the second surface are each Weil base or top surfaces of the cavity H and symmetrical to the axial axis A.
  • the cavity H is created, for example, by a bore in the bulge.
  • the cavity H forms a sound channel 7.
  • the airborne sound waves are guided through the sound channel 7 to an acoustic sensor 1.
  • the acoustic sensor 1 is on the rear side of the circuit board L in the air flow direction R, which is the surface of the circuit board L equipped with the electronic components.
  • a first membrane 5 according to the invention is net angeord.
  • the acoustic sensor 1 is arranged as an extension of the second end E2 of the sound channel 7.
  • the acoustic sensor 1 is an electroacoustic sensor, for example a microphone.
  • the acoustic sensor 1 is a MEMS microphone.
  • Figs. 1, 2 and 3 each show a microphone capsule.
  • the acoustic sensor 1 is coupled to the sound channel 7 and to a circuit board 7 by means of a device component 10.
  • the circuit board L is arranged in a housing G.
  • the housing G is an electronic housing.
  • the circuit board L includes components and their connections for pre-processing analog or digital signals from the acoustic sensor 1. Furthermore, the circuit board L includes plug connections S to connect the circuit board L and thus the device AKS with an electronic control unit for signaling purposes.
  • the housing G comprises a second membrane 12 designed as a ventilation membrane for static pressure equalization of the housing G and for preventing condensation from forming in the housing G.
  • the housing G also comprises fastening means 13, for example screws.
  • FIG. 7 shows an example sequence of a method according to the invention. Another aspect of the invention is a different order of the individual method steps, for example V6, V5, V4, V3, V2, and V1.
  • acoustic sensor 1 is coupled to the circuit board L by means of the sealing component 10.
  • the acoustic sensor 1 is coupled by means of the sealing component 10 to the second end E2 of the sound channel 7 with a smaller second area.
  • the first membrane 5 is arranged at the first end E1 of the sound channel 7 with a larger second surface.
  • the protective guard is ter 2 inserted into the decoupling component 11.
  • the inflow component 8 is brought together with the decoupling component 11 to the flow bypass 6.
  • the housing obtained in this way for the acoustic sensor 1 is in the component B, in which the housing can be installed and / or from this the housing is mechanically durable, used.
  • FIG. 8 shows a passenger car as an example of a road vehicle F.
  • the device AKS according to the invention is integrated into an outside K of the road vehicle F, for example into a bumper.
  • the AKS device is held in the bumper by means of component B, see FIG. 9.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

L'invention concerne un dispositif (AKS) permettant de détecter des bruits aériens pour des applications automobiles, où il existe des écoulements d'air entre le dispositif (AKS) et une source sonore du bruit aérien, le dispositif (AKS) comprenant un capteur acoustique (1), une grille de protection (2) destinée à protéger le dispositif (AKS) de l'entrée de corps étrangers, une première membrane (5) acoustiquement perméable, hydrophobe et/ou lipophobe, une dérivation d'écoulement (6) s'étendant entre la grille de protection (2) et la première membrane (5), un canal sonore (7) et une carte de circuits imprimés (L), la carte de circuits imprimés (L) comprenant des composants et leurs connexions pour effectuer un traitement préalable de signaux analogiques ou numériques du capteur acoustique (1) et une ouverture de carte de circuits imprimés (4), ouverture où, sur la face arrière de la carte de circuits imprimés (L) dans la direction d'écoulement de l'air, est monté le capteur acoustique (1).
PCT/EP2020/059969 2019-05-03 2020-04-08 Dispositif pour détecter des bruits aériens pour des applications automobiles, où il existe des écoulements d'air entre le dispositif et une source sonore du bruit aérien, procédé de fabrication d'un dispositif de ce type et véhicule routier à commande automatisée comprenant un dispositif de ce type WO2020224904A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20719140.4A EP3963900A1 (fr) 2019-05-03 2020-04-08 Dispositif pour détecter des bruits aériens pour des applications automobiles, où il existe des écoulements d'air entre le dispositif et une source sonore du bruit aérien, procédé de fabrication d'un dispositif de ce type et véhicule routier à commande automatisée comprenant un dispositif de ce type

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019206331.4 2019-05-03
DE102019206331.4A DE102019206331B4 (de) 2019-05-03 2019-05-03 Vorrichtung zum Detektieren von Luftschall für automobile Anwendungen, bei denen Luftströmungen zwischen der Vorrichtung und einer Schallquelle des Luftschalls vorhanden sind, Verfahren zur Herstellung einer derartigen Vorrichtung und automatisiert betreibbares Straßenfahrzeug umfassend eine derartige Vorrichtung

Publications (1)

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WO2020224904A1 true WO2020224904A1 (fr) 2020-11-12

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PCT/EP2020/059969 WO2020224904A1 (fr) 2019-05-03 2020-04-08 Dispositif pour détecter des bruits aériens pour des applications automobiles, où il existe des écoulements d'air entre le dispositif et une source sonore du bruit aérien, procédé de fabrication d'un dispositif de ce type et véhicule routier à commande automatisée comprenant un dispositif de ce type

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EP (1) EP3963900A1 (fr)
DE (1) DE102019206331B4 (fr)
WO (1) WO2020224904A1 (fr)

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DE102021204327A1 (de) 2021-04-30 2022-11-03 Zf Friedrichshafen Ag Anordnung zum Detektieren von Luftschall für automobile Anwendungen und Fahrzeug umfassend wenigstens eine derartige Anordnung
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DE102022205942A1 (de) 2022-06-13 2023-12-14 Zf Friedrichshafen Ag Verfahren zum Bestimmen von Positionen von Mikrofonen in einer Mikrofon-Anordnung für die Lokalisierung akustischer Signalquellen und Verfahren zum Bestimmen einer Fahrzeug bezogenen Übertragungsfunktion für eine Mikrofon-Anordnung des Fahrzeuges für die Lokalisierung akustischer Signalquellen
DE102023200511A1 (de) * 2023-01-24 2024-07-25 Robert Bosch Gesellschaft mit beschränkter Haftung Akustische Vorrichtung, Gehäusekörper für eine akustische Vorrichtung und Verfahren zum Herstellen einer akustischen Vorrichtung sowie eines Gehäusekörpers
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DE102019206331B4 (de) 2022-01-20
DE102019206331A1 (de) 2020-11-05

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