EP3963899A1 - VORRICHTUNG UND SYSTEM ZUR MESSUNG VON LAUTSTÄRKEN VON GERÄUSCHEN EINES STRAßENFAHRZEUGES IM STRAßENVERKEHR - Google Patents
VORRICHTUNG UND SYSTEM ZUR MESSUNG VON LAUTSTÄRKEN VON GERÄUSCHEN EINES STRAßENFAHRZEUGES IM STRAßENVERKEHRInfo
- Publication number
- EP3963899A1 EP3963899A1 EP20720375.3A EP20720375A EP3963899A1 EP 3963899 A1 EP3963899 A1 EP 3963899A1 EP 20720375 A EP20720375 A EP 20720375A EP 3963899 A1 EP3963899 A1 EP 3963899A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- aks
- acoustic sensor
- circuit board
- road vehicle
- road
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
- H04R1/04—Structural association of microphone with electric circuitry therefor
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/017—Detecting movement of traffic to be counted or controlled identifying vehicles
- G08G1/0175—Detecting movement of traffic to be counted or controlled identifying vehicles by photographing vehicles, e.g. when violating traffic rules
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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; ELECTRIC HEARING AIDS; 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; ELECTRIC HEARING AIDS; 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; ELECTRIC HEARING AIDS; 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; ELECTRIC HEARING AIDS; 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
- the invention relates to a device and a system for measuring the volume of noises of a road vehicle in traffic.
- Noise nuisance for example early and / or late or at night, is a major nuisance for many residents of streets. According to statistics, traffic noise is the second largest form of environmental nuisance after air pollution. Traffic noise can increase the risk of heart disease and / or diabetes for those affected. As measures against noise pollution, speed measurement systems and speed limits are known.
- the invention has the object of improving the measures against noise pollution in road traffic.
- the device measures the volume of noises of a road vehicle in road traffic.
- the device solves the task through Systemei property from the specific coordination of individual components of the device with one another.
- the device comprises an acoustic sensor.
- the device includes protective grids to secure the device against the ingress of coarser foreign bodies.
- the protective grille comprising at least one opening for an inlet of airborne sound into the device. The opening is arranged axially offset to an axial axis of the device.
- the device also includes a flow bypass. The flow bypass runs between the protective grille and the acoustic sensor. In this way, fluids and / or foreign bodies that have entered the device as a result of air currents are directed away from the device from the acoustic sensor.
- the device comprises a sound channel arranged parallel to the axial axis, at one end of which the protective grille is arranged, the first end in the air flow direction, and at the second end of which the acoustic sensor is attached. is arranged.
- the diameter, length, volume, shape and / or material properties of the sound channel are adapted to dampen natural modes of the device.
- the device also 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 the implementation of filter functions, functions for phase reversal, compressor functions and / or amplifier functions.
- the circuit board comprises the acoustic sensor on one side of the circuit board.
- the acoustic sensor is arranged on the lower side of the circuit board in the air flow direction.
- 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 net angeord on the front side of the circuit board in the air flow direction.
- the acoustic sensor has its sound inlet opening on the side of the acoustic sensor on the opposite side of the component mounting side of the circuit board.
- the circuit board also includes a computing unit.
- the arithmetic unit is designed to generate a control signal for a detection unit as a function of signals from the acoustic sensor when it detects that a set volume has been exceeded.
- the road vehicle is thus recorded.
- the device furthermore comprises an interface in order to provide the control signal to the detection unit.
- the invention provides a device which detects the volume of passing road vehicles and the road vehicle can flash when a limit value is exceeded, similar to a speed monitoring system.
- the specialty of the device according to the invention is the functionality and airborne sound detection and its conversion under difficult environmental and flow conditions that exist in road traffic. These environmental conditions also result from the intended use and / or installation locations of the device in road traffic, where relative air currents arise.
- airborne sound can be recorded 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 airborne sound inlet, i.e. the sound inlet opening, the flow bypass and the sound channel, taking into account airborne and / or structure-borne noise, aeroacoustics, flow and fluid dynamics, electronics and mechanics are coordinated with one another.
- the device according to the invention provides weather protection for the acoustic sensor of the device. This means that noises in road traffic can be measured under unfavorable weather conditions, such as precipitation. With the device according to the invention who carried out the noise measurements of individual road vehicles by means of the acoustic sensor. If a target volume is exceeded during such a measurement, the device activates a detection unit in order to detect the respective road vehicle, for example to photograph it, comparable to a speed measurement system. This means that speed limits can in principle be avoided.
- Road vehicles are, for example, passenger cars, commercial vehicles or tractors.
- Road vehicles are motor-operated, for example by means of internal combustion engines, electric motors or hybrid-electric.
- noises arise from the engine, static friction between the tires and the road surface and the flow resistance of the road vehicle.
- the volume of these noises is the amplitude, sound pressure or sound pressure level of the airborne sound that emanates from these noises. For example, a limit value of 80 decibels is a target volume.
- the device represents a housing for the acoustic sensor.
- acoustic sensor denotes 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 signal that the acoustic sensor outputs corresponds to the volume of the noise.
- the acoustic sensor includes an analog and / or digital signal output.
- the forming takes place in two stages. In a first acoustic-mechanical In the 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 electric coil, microphones, accelerometers, piezo sensors or strain gauges.
- a micro-electro-mechanical system, abbreviated to MEMS, comprising an arrangement of semiconductor elements that absorb vibrations, can also be used as an acoustic sensor.
- the protective grille is a grille with a mechanical protective function.
- the protective grille is designed in such a way that coarse foreign objects, i.e. particles with a diameter of at least 2 mm, for example dirt particles such as mud particles, dust particles, soot particles, grains of salt, stones, insects, or other particles that are in the air, do not enter the device can penetrate.
- 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 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, so that the aeroacoustic noise generated by the flow is reduced and the effective flow dynamic forces do not negatively affect the subsequent components of the device, for example damage or degrade.
- 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.
- a computing unit receives input values, calculates output values from these input values according to a specific process and outputs the output values.
- a computing unit is implemented by an electronic circuit unit.
- Logic modules, ASICs, FGPAs, CPUs and GPUs are processing units.
- the computing unit is integrated on the circuit board, for example as a surface mounted device, or SMD for short.
- a detection unit is, for example, an optical, imaging system that generates a photo of the road vehicle. This identifies the road vehicle from which the target volume is exceeded, that is to say from which a noise nuisance originates. This allows the police to remove roaring road vehicles from traffic and in the event that the target volume is exceeded Penalties are imposed. This can reduce the risk of heart disease and / or diabetes for those affected who are exposed to noise pollution.
- the interface is wired or wireless.
- the interface is designed for signal transmission using radio technology.
- the device is coupled to a speed monitoring system. That is to say, the detection unit is a camera of the speed monitoring system and the interface is an interface to the speed monitoring system.
- the speed monitoring system is a stationary system or a mobile system, for example mounted on a trailer.
- the acoustic sensor comprises a microphone.
- the microphone includes a microphone capsule and a transducer.
- the acoustic-mechanical conversion takes place in the microphone capsule.
- the microphone capsule comprises, for example, a membrane that is excited to vibrate by airborne sound.
- the mechanical-electrical conversion takes place in the converter.
- the converter is for example an electrodynamic converter, such as a moving coil microphone, or an electrostatic converter, such as 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 device comprises an acoustically permeable, hydrophobic and / or lipophobic first membrane.
- the first membrane is behind the protective grille in the air flow direction at the first end of the sound channel arranged.
- the flow bypass runs between the protective grille and the first membrane.
- 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 watertight 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.
- a 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 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 PPI.
- the protective grille comprises a filter foam in the range 10 to 80 PPI.
- 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.
- Flow breaks and / or flow turbulences generate aeroacoustic noise.
- the susceptibility to flow breaks and / or flow turbulence is greatly reduced, and so is the generation of aeroacoustic 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 at the other end with a closure element with a Reflection factor completed.
- 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 essentially has the shape of a truncated cone or a horn part and the first membrane is arranged 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 .
- a horn part as disclosed, for example, in FIG. 1 of DE 38 43 033 C2 is a robust system for the highly 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. A minimal acoustic attenuation of the sound energy flow is thus 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.
- the inflow component and its bulge are shaped such that the aeroacoustic sound generated by the air flow through the flow bypass is dampened.
- 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 includes fasteners, for example screws, around the housing and the device to be attached to an object of a traffic infrastructure, for example an amplemast, a guard rail or a speed control system.
- 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 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, 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 produces an acoustically and / or vibrationally we kenden impedance jump.
- the two-component material comprises a relatively soft material with a relatively low impedance and a relatively hard material with a relatively high impedance.
- the soft material is arranged in front of the hard material in the direction of air flow.
- the impedance jump is carried out over the entire contact surface of the protective grille and the decoupling component.
- the decoupling component is, for example, a molded part.
- the protective grid and the decoupling component formed from an injection molded part.
- the decoupling component is made of vibration-damping materials of different densities, for example from mixed-cell polyurethane foams.
- the decoupling component has, for example, a high mechanical load capacity and / or good insulating properties. By means of the decoupling component, the device is insensitive to shocks and durable.
- the device comprises a second membrane for venting the device.
- the second membrane provides static pressure compensation for the device.
- the proportional static pressure is compensated for by the second membrane.
- the second membrane prevents condensation from forming in the device.
- the device can be retrofitted as a retrofit component to objects in the traffic infrastructure.
- the computing unit is designed to process an artificially intelligent algorithm.
- the artificially intelligent algorithm is trained to classify the road vehicles as a function of the signals from the acoustic sensor.
- the target volume depends on the classified road vehicle.
- the artificially intelligent algorithm is, for example, an artificial neural network that has been trained to classify noises from road vehicles.
- the device recognizes which type of road vehicle is causing noise pollution.
- noises and noise nuisance emanating from these noises from tractors or trucks, which are usually louder than passenger cars can be distinguished from noise and noise nuisances emanating from these noises from passenger cars. In this way, the device recognizes the type of road vehicle F from which noise pollution originates.
- the system according to the invention measures the volume of noises of a road vehicle in traffic.
- the system comprises a device according to the invention device and a detection unit that is operatively connected to the device.
- the detection unit is arranged behind the device in the direction of travel of the road vehicle.
- the detection unit detects the road vehicle as a function of a control signal from the device. If, for example, the device measures that noises emanating from the road vehicle exceed a target volume, the detection unit, which is arranged, for example, a few meters behind the device, is activated and photographs the road vehicle.
- the device triggers the detection unit in a manner comparable to a light barrier in a speed monitoring system.
- the detection unit comprises a camera. This means that the road vehicle is photographed when a set volume is exceeded.
- the detection unit is a speed monitoring system that includes a camera.
- the system is designed as a mobile system, for example mounted on a trailer.
- Fig. 1 is a 3D view of an embodiment of an inventive device Vorrich
- FIG. 2 shows an exemplary embodiment of a system according to the invention comprising the device from FIG. 1,
- FIG. 3 shows an isometric sectional view of a further exemplary embodiment of a device according to the invention
- FIG. 4 is a side sectional view of the exemplary embodiment from FIG. 3,
- FIG. 5 shows an exploded view of the exemplary embodiment from FIG. 6 shows a sectional view of the exemplary embodiment from FIG. 1,
- FIG. 7 shows a side sectional view of the exemplary embodiment from FIG. 1, and
- FIG. 8 a three-dimensional view of the exemplary embodiment from FIG. 1.
- the computing unit 4 is mounted on the circuit board L.
- the computing unit 4 processes an artificial neural network.
- the artificial neural network comprises convolutional layers and / or completely connected layers.
- the artificial neural network is trained to classify noises from road vehicles F depending on the type of road vehicle F.
- the device recognizes which type of road vehicle F is causing noise pollution.
- the arithmetic unit 4 determines a control signal for a detection unit K in order to detect the road vehicle F as a function of signals from an acoustic sensor 1 of the device AKS upon detection of a set volume being exceeded.
- the interface I provides the control signal for the detection unit K, see also FIG. 2.
- Fig. 2 shows a system according to the invention.
- the system comprises the device AKS from FIG. 1.
- the interface I of the device AKS is an, for example wired, interface to the detection unit K.
- the detection unit K is a stationary traffic speed camera for monitoring speed limits.
- the acquisition unit K includes a camera CAM.
- the road vehicle F generates noises when traveling. The respective airborne sound waves of the noises are recorded and evaluated by the AKS device. Detects the computing unit 4 of the Device AKS If the target volume is exceeded, the camera CAM of the detection unit K is activated via the interface I of the device AKS in order to detect and identify the road vehicle.
- the system is mounted on a trailer, for example, which can be driven to defined places, for example places with a high level of noise pollution. This makes the system mobile.
- 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.
- the component B is, for example, an injection molded part or a component manufactured using an additive process, for example a 3D printing process.
- the component B comprises a circular opening. Component B is only shown in FIGS. 3, 4 and 5.
- a protective grille 2 according to the invention is inserted into this opening.
- the protective grille 2 is coupled to the component B by means of a decoupling component 1 1 according to the invention, see FIGS. 3, 4 and 5.
- the protective grille 2 and the decoupling component 11 are taken from an injection molded part gefer. 3, 4 and 5, the protective grille 2 comprises four symmetrically arranged slot-shaped openings 3a, 3b, 3c and 3d.
- the openings 3a, 3b, 3c and 3d are inlet openings for airborne sound waves in the device AKS, as are the openings 3a, 3b and 3c in Fig. 1, 2, 6, 7 and 8.
- the airborne sound waves occur in the air flow direction R in the device AKS one.
- 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. 5 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 the acoustic sensor 1.
- the acoustic sensor 1 is arranged on the rear side of the printed circuit board L in the air flow direction R, which is the surface of the printed 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.
- the acoustic sensor 1 is coupled to the sound channel 7 and to a circuit board 7 by means of a sealing component 10.
- the circuit board L is arranged in a housing G.
- the housing G is an electronic housing.
- the circuit board L comprises components and their connections for preprocessing analog or digital signals from the acoustic sensor 1. Furthermore, the circuit board L includes plug connections S in order 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.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- General Physics & Mathematics (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019206329.2A DE102019206329B4 (de) | 2019-05-03 | 2019-05-03 | Vorrichtung und System zur Messung von Lautstärken von Geräuschen eines Straßenfahrzeuges im Straßenverkehr |
| PCT/EP2020/059968 WO2020224903A1 (de) | 2019-05-03 | 2020-04-08 | VORRICHTUNG UND SYSTEM ZUR MESSUNG VON LAUTSTÄRKEN VON GERÄUSCHEN EINES STRAßENFAHRZEUGES IM STRAßENVERKEHR |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3963899A1 true EP3963899A1 (de) | 2022-03-09 |
| EP3963899B1 EP3963899B1 (de) | 2023-03-29 |
Family
ID=70333920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20720375.3A Active EP3963899B1 (de) | 2019-05-03 | 2020-04-08 | Vorrichtung und system zur messung von lautstärken von geräuschen eines strassenfahrzeuges im strassenverkehr |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3963899B1 (de) |
| DE (1) | DE102019206329B4 (de) |
| WO (1) | WO2020224903A1 (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102020213964B4 (de) | 2020-11-06 | 2023-03-02 | Zf Friedrichshafen Ag | Vorrichtung zum Detektieren von Luftschall für automobile Anwendungen, Verfahren zu deren Herstellung und automatisiertes Fahrsystem umfassend eine derartige Vorrichtung |
| 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 |
| EP4175314A1 (de) | 2021-10-26 | 2023-05-03 | Harman International Industries, Incorporated | Mikrofonvorrichtung mit einem geschlossenen gehäuse und einer membran |
| DE102022205148B3 (de) | 2022-05-24 | 2023-09-14 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein | Geschlossener Schallaufnehmer mit schalldurchlässiger Grenzfläche |
| 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 |
| DE102023202141B4 (de) * | 2023-03-10 | 2025-09-11 | Zf Friedrichshafen Ag | Akustiksensorgehäuse zur Erfassung von Luftschall im Außenbereich von sich im Luftfluid bewegenden Fahrzeugen und Fahrzeug umfassend ein oder mehrere derartige Akustiksensorgehäuse |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3661224A (en) * | 1970-09-14 | 1972-05-09 | Columbia Broadcasting Syst Inc | Noise monitoring apparatus |
| US4857912A (en) | 1988-07-27 | 1989-08-15 | The United States Of America As Represented By The Secretary Of The Navy | Intelligent security assessment system |
| DE3843033A1 (de) | 1988-12-21 | 1990-06-28 | Messerschmitt Boelkow Blohm | Mikrofon hoher empfindlichkeit |
| JPH03113700A (ja) * | 1989-09-28 | 1991-05-15 | Omron Corp | 異常騒音車両感知装置 |
| WO1997008896A1 (en) | 1995-08-23 | 1997-03-06 | Scientific-Atlanta, Inc. | Open area security system |
| DE19621152A1 (de) | 1996-05-14 | 1997-11-20 | Klaus Ebert | Verfahren zum Überwachen und zum Auslösen eines Alarmes für einen zu sichernden Bereich und ein Überwachungssystem |
| JP4199037B2 (ja) | 2003-04-03 | 2008-12-17 | 株式会社日立国際電気エンジニアリング | 音響用開口部の排水構造 |
| JP4414773B2 (ja) | 2004-01-15 | 2010-02-10 | オリンパス株式会社 | 発音または集音部材の防水滴構造及びこれを有する電子機器 |
| DE102009034444A1 (de) | 2009-07-23 | 2011-01-27 | Siemens Aktiengesellschaft | Verfahren zur Überwachung einer Umgebung mit mehreren akustischen Sensoren |
| EP2566182A1 (de) * | 2011-08-31 | 2013-03-06 | GN Resound A/S | Windrauschunterdrückungsfilter |
| US8644530B2 (en) * | 2011-09-29 | 2014-02-04 | Nokia Corporation | Dust protection of sound transducer |
| US8724840B2 (en) * | 2012-03-22 | 2014-05-13 | Robert Bosch Gmbh | Offset acoustic channel for microphone systems |
| US9363589B2 (en) | 2014-07-31 | 2016-06-07 | Apple Inc. | Liquid resistant acoustic device |
| US20160241818A1 (en) | 2015-02-18 | 2016-08-18 | Honeywell International Inc. | Automatic alerts for video surveillance systems |
| US20170223314A1 (en) | 2016-01-29 | 2017-08-03 | John K. Collings, III | Limited Access Community Surveillance System |
| US10440471B2 (en) * | 2017-09-13 | 2019-10-08 | Cithaeron Inc | Noise violation localization identifier |
| JP6594397B2 (ja) | 2017-10-31 | 2019-10-23 | キヤノン株式会社 | マイクロホン保持構造 |
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- 2019-05-03 DE DE102019206329.2A patent/DE102019206329B4/de not_active Expired - Fee Related
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2020
- 2020-04-08 EP EP20720375.3A patent/EP3963899B1/de active Active
- 2020-04-08 WO PCT/EP2020/059968 patent/WO2020224903A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020224903A1 (de) | 2020-11-12 |
| DE102019206329B4 (de) | 2022-02-03 |
| EP3963899B1 (de) | 2023-03-29 |
| DE102019206329A1 (de) | 2020-11-05 |
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