WO2020007560A1 - Capteur à ultrasons avec réglage de la caractéristique d'émission/réception - Google Patents

Capteur à ultrasons avec réglage de la caractéristique d'émission/réception Download PDF

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Publication number
WO2020007560A1
WO2020007560A1 PCT/EP2019/064751 EP2019064751W WO2020007560A1 WO 2020007560 A1 WO2020007560 A1 WO 2020007560A1 EP 2019064751 W EP2019064751 W EP 2019064751W WO 2020007560 A1 WO2020007560 A1 WO 2020007560A1
Authority
WO
WIPO (PCT)
Prior art keywords
ultrasonic sensor
vehicle
adaptation
transmission
detection
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.)
Ceased
Application number
PCT/EP2019/064751
Other languages
German (de)
English (en)
Inventor
Paul David Rostocki
Heinrich Gotzig
Akhil DHEERENDRA JAYA
Patrick Pfitzenmaier
Daniel LEIDIG
Tobias Breuninger
Danil Koryakin
Marek RAFALOWSKI
Rene KARSTEN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Schalter und Sensoren GmbH
Original Assignee
Valeo Schalter und Sensoren GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valeo Schalter und Sensoren GmbH filed Critical Valeo Schalter und Sensoren GmbH
Publication of WO2020007560A1 publication Critical patent/WO2020007560A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/52004—Means for monitoring or calibrating
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
    • G01S15/06—Systems determining the position data of a target
    • G01S15/08—Systems for measuring distance only
    • G01S15/10—Systems for measuring distance only using transmission of interrupted, pulse-modulated waves
    • G01S15/18—Systems for measuring distance only using transmission of interrupted, pulse-modulated waves wherein range gates are used
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/87—Combinations of sonar systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/88—Sonar systems specially adapted for specific applications
    • G01S15/93—Sonar systems specially adapted for specific applications for anti-collision purposes
    • G01S15/931—Sonar systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/52004—Means for monitoring or calibrating
    • G01S7/52006—Means for monitoring or calibrating with provision for compensating the effects of temperature
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/523—Details of pulse systems
    • G01S7/526—Receivers
    • G01S7/527—Extracting wanted echo signals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/52004—Means for monitoring or calibrating
    • G01S2007/52007—Means for monitoring or calibrating involving adjustment of transmitted power
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
    • G01S15/88—Sonar systems specially adapted for specific applications
    • G01S15/93—Sonar systems specially adapted for specific applications for anti-collision purposes
    • G01S15/931—Sonar systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • G01S2015/937—Sonar systems specially adapted for specific applications for anti-collision purposes of land vehicles sensor installation details

Definitions

  • the present invention relates to a method for adapting an ultrasonic sensor for a driving support system of a vehicle.
  • the present invention also relates to an ultrasound sensor arrangement with at least one ultrasound sensor and a control unit, the control unit being designed to carry out an adaptation of the at least one ultrasound sensor using the above method.
  • the present invention relates to a driving support system with at least one ultrasound sensor arrangement.
  • ultrasonic sensors are used on many vehicles in order to detect objects in the surroundings of the respective vehicle.
  • a plurality of ultrasonic sensors are typically attached along the sides of the vehicle.
  • ultrasonic sensors on the front and back there are also increasing numbers
  • Ultrasonic sensors are attached to the long sides of the vehicle, for example to monitor cross-traffic or to be able to recognize free parking spaces at the edge of the road as you drive past.
  • the environment is monitored based on ultrasound signals that are emitted by one of the ultrasound sensors.
  • the ultrasound signals are reflected on objects and the echoes are from the ultrasound sensor, which
  • the emitted ultrasound signals can contain a single ultrasound pulse or a pulse sequence.
  • the pulse sequence can be individual for a vehicle or even for each ultrasonic sensor in order to be able to assign echoes to a vehicle or an ultrasonic sensor.
  • ultrasonic sensors Due to the propagation speed of sound in air of approximately 340 meters per second, ultrasonic sensors have a limited range in order to be able to detect the objects in the vicinity of the vehicle in a timely manner. At a distance of ten meters from the object there is already a running time of the ultrasonic signal from the Ultrasonic sensor to the object and back to the ultrasonic sensor of almost 0.06 seconds.
  • the detection of objects is determined by comparing an echo signal voltage with a reference voltage, which is also referred to as a reception threshold.
  • the echo signal voltage indicates a signal strength of the received echo of the ultrasound signal on the object. Nearby objects typically generate stronger echoes. If the echo signal voltage is above the reference voltage, which is also referred to as a reception threshold.
  • the signal transmitted from the ultrasonic sensor to the control unit is the signal transmitted from the ultrasonic sensor to the control unit.
  • the reference voltage is usually individually adapted to the respective vehicle.
  • the reference voltage can be dependent, for example, on a sensor height on the vehicle and an increase angle.
  • Speed is usually not a problem.
  • the sensor membranes of the ultrasonic sensor also called an ultrasonic membrane, can be excited by a driving wind.
  • the movement of the vehicle pushes the surrounding air away in different directions. This can lead to turbulence, particularly in the area of the bumpers and thus those positioned there
  • Disturbances can be caused which are above the reference voltage and can thus cause a detection of a non-existent object.
  • Such false recognition of non-existent objects in turn means that the vehicle cannot reliably provide assistance or support functions.
  • assistance or support functions are also referred to as ADAS.
  • an ultrasound parking aid system is known from DE 196 45 339 A1. Such systems give warning signals when one within one
  • Echo signal lying hearing window exceeds a certain threshold. So far, an audible window or the sensitivity of the system has been adjusted once to fixed data of the vehicle and / or the road. It is also proposed to adapt the sensitivity, the audible window, or also the transmission curve as a function of changing dynamic data of the vehicle or the road.
  • DE 10 2008 041 752 A1 also discloses a device for setting a reception threshold.
  • the apparatus includes a first comparator and a first counter for detecting a first frequency of crossing a first threshold value by a background signal and a second comparator and a second counter for detecting a second frequency of crossing a second threshold value by the background signal, the second
  • Threshold is greater than the first threshold.
  • a data processing device is used to set the reception threshold based on the first and second frequency.
  • DE 10 2012 200 230 A1 relates to a detection of the surroundings of a vehicle by means of acoustic signals.
  • Quantities such as the wind strength and / or components of the wind direction and / or the occurrence of changes in the propagation properties of the acoustic signal can be taken from the model, the changes in the propagation properties due to climatic differences, in particular of temperature differences.
  • the invention is therefore based on the object of a method for adapting an ultrasonic sensor for a driving support system of a vehicle, an ultrasonic sensor arrangement with at least one ultrasonic sensor and a control unit, and a
  • a method for adapting an ultrasonic sensor for a driving support system of a vehicle comprising the steps of detecting at least one adaptation parameter of an operation of the vehicle and adapting a transmission / reception characteristic of the ultrasonic sensor depending on the at least one adaptation parameter.
  • an ultrasound sensor arrangement with at least one ultrasound sensor and a control unit is also specified, the control unit being designed to carry out an adaptation of the at least one ultrasound sensor using the above method.
  • a driving support system with at least one ultrasound sensor arrangement is also specified.
  • the basic idea of the present invention is therefore to make the detection of objects with ultrasonic sensors more reliable by adapting the Transmitting / receiving characteristic of the ultrasonic sensor takes place in order to be able to carry out the adaptation even before processing echoes received with the ultrasonic sensor. It is therefore expressly not a matter of adapting a reception threshold, for example in the form of a reference voltage, the exceeding of which indicates a detection of an object.
  • the adaptation of the transmission / reception characteristic relates to an adaptation of this characteristic itself before, for example, the reception threshold is applied to this signal.
  • Adaptation parameters serve to determine the type of the required adaptation of the transmission / reception characteristics.
  • the adaptation parameter can be a parameter that affects the vehicle itself or a parameter that affects one
  • the environment of the vehicle determines
  • control unit carries out the adaptation of the ultrasonic sensor. This concerns setting the transmission / reception characteristics of the ultrasonic sensor.
  • the control unit can also receive a signal from the ultrasonic sensor, which reflects the
  • the signal transmitted from the ultrasonic sensor to the control device is typically digital (0 or 1).
  • the ultrasound sensor arrangement can have a plurality of ultrasound sensors.
  • the control unit can be designed to adapt the plurality
  • a control unit therefore carries out the adaptation for several ultrasonic sensors.
  • an optimal function of all ultrasonic sensors can be achieved in order to take into account different adaptation parameters on the different ultrasonic sensors.
  • the ultrasonic sensors on the front and rear of the vehicle can be exposed to very different types of interference, for example depending on the direction of travel of the vehicle.
  • the driving support system typically includes a plurality of ultrasonic sensors, which are evaluated together.
  • the control unit of the ultrasonic sensors can be designed integrally with a control unit of the driving support system.
  • the driving support system is preferably designed as a system for monitoring a blind spot of the vehicle while driving or as a parking steering assistant. In principle, however, other versions of the driving support system are also possible.
  • the driving support system can also combine various
  • adapting a transmission / reception characteristic of the ultrasonic sensor includes adapting one
  • the reception sensitivity of the ultrasound sensor can be set, for example, by an amplification circuit which amplifies an electrical reception signal of a movement of an ultrasound membrane of the ultrasound sensor.
  • the amplification circuit can particularly preferably be adjusted in its amplification.
  • the amplification can be selected to be low in order to be able to receive strong reflections of the emitted ultrasound signal reliably and without clipping. Faults can be suppressed.
  • With a large amplification slight echoes of objects can also be detected, such as those generated on objects further away.
  • the adaptation of a transmission / reception characteristic of the ultrasound sensor comprises an adaptation of a transmission power of the ultrasound sensor.
  • the transmission power can be adapted, for example, by means of a corresponding amplifier circuit for controlling the ultrasound sensor in order to deflect the ultrasound membrane.
  • the greater the transmission power the greater the potential range of the ultrasound sensor and the greater the distance between the levels of echoes of the emitted ultrasound signal compared to interference signals and noise.
  • a lower one can be used
  • Transmitting power may be preferred. With a large transmission power, echoes from Objects are detected, such as those generated on objects that are further away.
  • the adaptation of a transmission / reception characteristic of the ultrasound sensor comprises an adaptation of a reception window of the ultrasound sensor.
  • the reception window relates to an area in which echoes from emitted ultrasound signals can be received.
  • the reception window thus also serves to tune the ultrasound sensor for the reception window by simply adapting the ultrasound sensor for the basic reception of echoes of transmitted ultrasound signals.
  • the reception window can be adapted by adapting the transmission power and / or the reception sensitivity.
  • the reception window is preferably adapted by means of a combined and coordinated adaptation of both the transmission power and the
  • the detection of at least one adaptation parameter comprises a detection of a speed of the vehicle.
  • the speed of the vehicle is relevant, for example, in relation to turbulence that can arise at the ultrasonic sensors and the membrane of the
  • the speed can be determined by the vehicle based on odometry information, i.e. Wheel movements or the like, or based on satellite navigation signals (GPS, Galileo, or others).
  • the speed is preferably a relative speed based on the ambient air, for example taking wind into account.
  • the detection of at least one adaptation parameter comprises detection of at least one environmental condition of the vehicle, in particular precipitation, air humidity, and / or an ambient temperature.
  • Precipitation and air humidity can itself lead to the generation of unwanted reflections of the transmitted ultrasound signal.
  • These echoes typically have a low intensity and can be suppressed, for example, by adjusting the reception sensitivity.
  • the temperature affects the speed of sound propagation, which accordingly
  • a change in temperature of around 5 ° C can cause a change in the speed of sound of around one percent. Precipitation, humidity, and / or one
  • Ambient temperatures are preferably determined using appropriate sensors attached to the vehicle.
  • the detection of at least one adaptation parameter comprises detection of at least one road condition in an environment of the vehicle.
  • the road conditions can be, for example, freeway, city traffic, or overland.
  • Surface textures of the roadway can be generated, for example, in the case of a gravel roadway or similar echoes of the emitted ultrasound signals, which are to be regarded as disturbances, since they cannot be assigned to objects that restrict movement of the vehicle. These echoes typically have a low intensity and can be suppressed, for example, by adjusting the reception sensitivity.
  • the road condition can be determined, for example, based on map information and a current position of the vehicle. As an alternative or in addition, the roadway condition can be determined using sensors of the vehicle, for example a camera.
  • the method comprises an additional step for evaluating sensor signals received with the ultrasound sensor, and adapting a transmission / reception characteristic of the ultrasound sensor comprises adaptively adapting the transmission / reception characteristics of the ultrasound sensor based on the sensor signals received with the ultrasound sensor.
  • the received sensor signals can thus themselves contribute to adapting the transmission / reception characteristics of the ultrasonic sensor. For example, a high level of noise in the received sensor signals can indicate that the
  • Ultrasonic sensor is to be increased.
  • the detection of at least one adaptation parameter comprises a detection of the at least one
  • Adjustment parameters in a number of stages enable simple adjustment of the transmission / reception characteristics, for example by accessing a so-called look-up table. Such a table can be used to make adjustments to the transmission / reception characteristics in a simple manner, in particular when a large number of adjustment parameters are used.
  • the method comprises an additional step for adapting a reference voltage based on the at least one adaptation parameter.
  • the reference voltage can vary over time.
  • the course of the reference voltage is also called the reference voltage curve or
  • Sensor threshold curve denotes and can be adjusted in total or in sections.
  • the additional adjustment of the reference voltage enables the ultrasound sensor to be further adapted to the adaptation parameters.
  • Such adaptations can be carried out, for example, in a supportive manner if the adaptation of the transmission / reception characteristics has already reached its limits
  • Fig. 1 is a schematic view of a vehicle with a
  • Fig. 2 shows a time course of detection of objects for different
  • Fig. 3 shows a quantitative representation of the detection of the objects in
  • Fig. 5 is a schematic representation of stages for the speed as
  • Fig. 6 shows a time course of detection of objects for different
  • Fig. 7 exemplary signal curves over time comprising a
  • Fig. 1 1 waveforms over time comprising the echo signal voltage received by vibrations at the ultrasonic sensor, the reference voltage and the digital signal from an unmatched ultrasonic sensor in a second configuration at a speed greater than 35 km / h, and
  • FIG. 12 shows waveforms over time comprising the echo signal voltage of vibrations received at the ultrasonic sensor, the reference voltage and the digital signal from an adapted ultrasonic sensor in a second configuration at a speed greater than 35 km / h.
  • FIG. 1 shows a vehicle 10 according to a first, preferred embodiment of the invention.
  • the vehicle 10 has a driving support system 12 which is used here for
  • the driving support system 12 combines the two individual functions for different driving situations. In one
  • the two individual functions are carried out in parallel in the driving support system 12.
  • the driving support system 12 comprises a plurality of ultrasonic sensors 14 and a control unit 16.
  • the control unit 16 is designed, the ultrasonic sensors 14 adapt together.
  • the control unit 16 thus forms ultrasound sensor arrangements 18 with the ultrasound sensors 14.
  • the control unit 16 forms an ultrasound sensor arrangement 18 with an ultrasound sensor 14 in each case.
  • the driving support system 12 is designed to monitor an environment 20 of the vehicle 10. For this purpose, it controls the ultrasound sensors 14 to send out ultrasound signals and to receive reflections thereof, which are evaluated in the control unit 16. For this purpose, a digital signal 26 is transmitted to the control unit 16 from each of the ultrasonic sensors 14 based on the received reflections.
  • the digital signal 26 is at a level here, and a change in the level of the digital signal 26 indicates that the corresponding ultrasonic sensor 14 is reflecting an object in the environment 20 of the
  • the method begins with a detection of adaptation parameters of an operation of the vehicle 10.
  • the adaptation parameters include a speed of the vehicle 10, ambient conditions of the vehicle 10 and a road condition in the surroundings 20 of the vehicle 10. Die
  • adaptation parameters are acquired in a plurality of stages.
  • Figures 4 and 5 show corresponding stages for the
  • S1, S2 are designated.
  • the speed is based on the vehicle 10
  • Odometry information ie wheel movements or the like, determined.
  • the speed can be determined based on satellite navigation signals (GPS, Galileo, or others).
  • GPS Globalstar, Galileo, or others.
  • the speed of the vehicle 10 is determined as a relative speed based on the ambient air.
  • the ambient conditions of the vehicle 10 include precipitation, air humidity, and an ambient temperature.
  • Vehicle 10 attached appropriate sensors determined.
  • the road conditions here include, for example, freeway, city traffic, or overland.
  • the roadway condition is taken from map information based on a current position of the vehicle 10.
  • the roadway condition is determined using sensors of vehicle 10, for example a camera.
  • the transmission / reception characteristics are adjusted by accessing a look-up table.
  • Ultrasonic sensor 14 individually adapted depending on the determined adaptation parameters.
  • the control unit 16 carries out the adaptation of the ultrasonic sensors 14.
  • adapting the transmission / reception characteristic of the ultrasonic sensor 14 includes adapting a reception sensitivity of the
  • Ultrasonic sensor 14 and an adjustment of a transmission power of the ultrasonic sensor 14.
  • FIG. 1 shows the transmission power (LPS) and the reception sensitivity (AZW) for the ultrasonic sensors 14 as examples.
  • FIGS. 2 and 3 contain comparative representations of the detection of objects with the front ultrasonic sensors 14 on the right and left, the
  • Ultrasonic sensor 14 in the front left is adapted such that it is higher
  • Figure 2 shows the detection of objects for different speeds.
  • a critical speed range which in this case is about 130 km / h
  • significantly fewer interfering signals are received by the adapted ultrasonic sensor 14 on the left front than by the non-adapted ultrasonic sensor 14 on the front right.
  • Figure 3 quantified in which the number of interference signals is counted. This is for the
  • FIG. 6 shows, analogously to FIG. 2, a different time profile for the detection of objects at different speeds.
  • the adapted ultrasound sensor 14 at the front left generates fewer interference signals than the ultrasound sensor 14 at the front right. This applies to the area above approximately 130 km / h, as has already been explained with reference to FIG. 2.
  • FIGS. 8 to 9 and 10 to 12 each relate to signal profiles for an ultrasonic sensor 14.
  • FIG. 7 serves only as an example as a legend for the different ones
  • the signal profiles from FIG. 7 are therefore provided for explanation.
  • the signal profiles each include an echo signal voltage 22 from at
  • Ultrasonic sensor 14 receive vibrations, a profile of a reference voltage 24 or reception threshold and a digital signal 26.
  • FIGS. 8 to 9 show the signal profiles for one
  • FIG. 8 shows the signal profiles of the
  • Ultrasonic sensor 14 in accordance with the ultrasonic sensor 14 at the front right in Figures 1 to 3 or 6, i.e. the ultrasonic sensor 14 is not adapted.
  • the echo signal voltage 22 exceeds the reference voltage 24 in various ways, so that the digital signal 26 indicates an object but is not present.
  • FIG. 9 shows corresponding signal profiles for the adapted ultrasound sensor 14.
  • the echo signal voltage 22 only exceeds the reference voltage 24 at one point, so that only incorrect object detection takes place.
  • FIGS. 10 to 12 relate to a different configuration of the ultrasonic sensors 14.
  • FIG. 10 shows the signal profiles when the system is stationary. Without an object present, the echo signal voltage 22 does not exceed the reference voltage 24. No objects that are not present are recognized.
  • Figure 1 1 shows the waveforms at a speed greater than 35 km / h.
  • the configuration of the ultrasonic sensor 14 corresponds to that of the ultrasonic sensor according to FIG. 10.
  • the echo signal voltage 22 shows great turbulence at the ultrasonic sensors 14, so that the echo signal voltage 22 is often above the reference voltage 24 and objects that are not present are recognized.
  • FIG. 12 also shows the signal curves at a speed greater than 35 km / h.
  • the ultrasonic sensor 14 was, however, different from the configuration Figure 1 1 adjusted.
  • the echo signal voltage 22 is rarely above the reference voltage 24, so that fewer non-existent objects are recognized.
  • the course of the reference voltage 24 is adapted based on the adaptation parameters.
  • the adaptation of the reference voltage 24 is only carried out in a supportive manner here if the adaptation of the transmission / reception characteristics has already been carried out up to its limits.

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Traffic Control Systems (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

L'invention concerne un procédé d'adaptation d'un capteur à ultrasons (14) pour un système d'aide à la conduite (12) d'un véhicule (10), comprenant les étapes consistant à détecter au moins un paramètre d'adaptation d'un fonctionnement du véhicule (10), et adapter une caractéristique émetteur-récepteur du capteur à ultrasons (14) en fonction de l'au moins un paramètre d'adaptation. L'invention concerne en outre un ensemble capteur à ultrasons (18) comprenant au moins un capteur à ultrasons (14) et une unité de commande (16), l'unité de commande (16) étant adaptée pour effectuer une adaptation de l'au moins un capteur à ultrasons (20) par le procédé susmentionné. L'invention concerne en outre un système d'aide à la conduite (12) à l'aide d'au moins un capteur à ultrasons (18) susmentionné.
PCT/EP2019/064751 2018-07-05 2019-06-06 Capteur à ultrasons avec réglage de la caractéristique d'émission/réception Ceased WO2020007560A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018116267.7 2018-07-05
DE102018116267.7A DE102018116267A1 (de) 2018-07-05 2018-07-05 Ultraschallsensor mit Anpassung der Sende-/Empfangscharakteristik

Publications (1)

Publication Number Publication Date
WO2020007560A1 true WO2020007560A1 (fr) 2020-01-09

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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
DE102022107381A1 (de) 2022-03-29 2023-10-05 Valeo Schalter Und Sensoren Gmbh Anpassen einer Erkennung von Objekten basierend auf dem Empfang von Ultraschallechosignalen mit Ultraschallsensoren eines Fahrzeugs

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