EP3175261A1 - Dispositif de détection par ultrasons pour un véhicule automobile, véhicule automobile et procédé - Google Patents

Dispositif de détection par ultrasons pour un véhicule automobile, véhicule automobile et procédé

Info

Publication number
EP3175261A1
EP3175261A1 EP15741175.2A EP15741175A EP3175261A1 EP 3175261 A1 EP3175261 A1 EP 3175261A1 EP 15741175 A EP15741175 A EP 15741175A EP 3175261 A1 EP3175261 A1 EP 3175261A1
Authority
EP
European Patent Office
Prior art keywords
ultrasonic sensor
actuator
sensor device
ultrasonic
control device
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.)
Withdrawn
Application number
EP15741175.2A
Other languages
German (de)
English (en)
Inventor
Thomas Jung
Wolfgang Hamm
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 EP3175261A1 publication Critical patent/EP3175261A1/fr
Withdrawn legal-status Critical Current

Links

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
    • 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
    • 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
    • G01S2007/52007—Means for monitoring or calibrating involving adjustment of transmitted power

Definitions

  • Ultrasonic sensor device for a motor vehicle, motor vehicle and method
  • the present invention relates to an ultrasonic sensor device for a motor vehicle, comprising an ultrasound diaphragm, an actuator for moving the ultrasound diaphragm and a control device for actuating the actuator. Moreover, the present invention relates to a motor vehicle with at least one such
  • the present invention relates to a method for operating an ultrasonic sensor device for a motor vehicle.
  • Such mechatronic systems usually include a mechanical one
  • Component an electronic component and an information technology
  • the interest is directed in particular to mechatronic systems which have a mechanical component, an actuating device or an actuator for moving the mechanical component and a control device for actuating the actuator.
  • Such a mechatronic system of a motor vehicle can be for example an ultrasonic sensor or an ultrasonic sensor device.
  • Ultrasonic sensors are used, for example, to detect objects in the environment of the motor vehicle and in particular to determine a distance to an object.
  • Such an ultrasonic sensor usually has an ultrasonic membrane as a mechanical component. This ultrasonic membrane can be moved or put into mechanical vibrations.
  • the ultrasonic membrane can be moved or put into mechanical vibrations.
  • Ultrasonic sensor on an actuator which may be formed, for example, as a piezoelectric actuator.
  • the ultrasonic sensor can with a corresponding
  • Control device which may be formed for example by a control unit of the motor vehicle, are controlled by means of an electrical signal.
  • the ultrasonic sensor devices age over time. especially the
  • Ultrasonic diaphragm as a mechanical component that is moved or set in mechanical vibration changes its performance over time due to wear and tear. For example, this deteriorates with ultrasonic sensors
  • Ultrasonic sensor device of the type mentioned can be operated reliably.
  • the actuator for moving the ultrasound diaphragm
  • a control device for actuating the actuator.
  • Ultrasonic sensor device on a memory device, in which a
  • Control device is designed to determine an age of the ultrasonic sensor device based on the stored production date.
  • the ultrasonic sensor device represents a mechatronic system.
  • This mechatronic system has a mechanical component in the form of the
  • the mechatronic system has a corresponding actuator, which serves to move or vibrate the mechanical component.
  • the actuator can be controlled in particular with an electrical signal.
  • the actuator can therefore be designed as an electromechanical converter.
  • the ultrasonic sensor device comprises a
  • Control device which may be formed for example by a control unit of the motor vehicle. With the control device electrical signals can be output for driving the actuator.
  • the present invention is based on the finding that an age of the ultrasound sensor device can be determined simply by virtue of a production date of the ultrasound sensor device in a memory device of the ultrasound sensor device
  • Ultrasonic sensor device is deposited. This can then be read out accordingly with the control device and thus the age or the life of the
  • Ultrasonic sensor device can be determined. The production date of the
  • Ultrasonic sensor device may be stored in the memory device after fabrication of the ultrasonic sensor device. Via a corresponding data connection, the production date from the storage device by means of the control device be easily read out. Thus, the age of the ultrasonic sensor device can be determined with little effort.
  • control device is designed to determine a current date and to determine the age of the ultrasonic sensor device based on a comparison of the determined current date with the stored production date.
  • Control device may include a corresponding microcontroller or a digital signal processor.
  • control device a
  • corresponding clock or include a clock with which the current date can be determined. From a comparison of the current date with the
  • the ultrasonic sensor device has a temperature detection device for continuously detecting a temperature of the ultrasound membrane and / or of the actuator.
  • Temperature detection device may, for example, a corresponding
  • Temperature sensor which is arranged in close proximity to the ultrasonic diaphragm or to the actuator, have.
  • Temperature load of the ultrasonic sensor can be determined. For example, corresponding temperature fluctuations can be recorded, to which the
  • Ultrasonic membrane is exposed.
  • a threshold value for the temperature is specified, and it is checked how often this threshold value is exceeded.
  • external influences or environmental influences on the ultrasonic sensor device and in particular the mechanical component, ie the ultrasound membrane can be monitored.
  • the ultrasonic sensor device comprises a
  • Detection device for detecting a number of activation processes of the actuator.
  • the detection device can be used to determine how often the actuator has been switched on or activated. Thus it can be determined how often the
  • Ultrasonic sensor device and in particular the ultrasonic diaphragm or the actuator are inferred.
  • the control device is adapted to a
  • the current operating state can be determined both on the basis of age, the external influences and the operating time.
  • control device is adapted to the actuator in
  • the ultrasonic sensor device has already aged or has been claimed. This can be taken into account in the control of the ultrasonic sensor device and in particular in the control of the actuator. Thus, the compensation of aging or stress can be achieved.
  • the controller is configured to provide power to operate the actuator in response to the particular operating condition of the actuator
  • Adjust ultrasound membrane and / or the actuator In particular, an electrical power with which the actuator is operated can be increased. In this way, the aging phenomena of the ultrasonic sensor device and in particular its mechanical component can be compensated.
  • the control device is preferably designed to adapt a frequency for operating the actuator as a function of the specific operating state of the ultrasound membrane and / or of the actuator. This aspect proves particularly advantageous since the ultrasonic membrane is usually operated at resonant frequency. Due to aging or operation, the resonance frequency of the
  • the ultrasonic sensor device can be operated energy-efficiently.
  • the ultrasonic sensor device has a measuring device for measuring the movement of the ultrasound membrane and the control device is adapted to the measuring device in dependence on the specific operating state of
  • the measuring device may include a corresponding sensor with which the movement or the mechanical vibration of the membrane can be detected.
  • the operating state which takes into account the aging and / or the load of the ultrasound membrane can be taken into account. In this way, the movement of the ultrasound membrane can be reliably detected.
  • control device is designed to amplify a
  • Adjusting the operating state of the ultrasonic membrane and / or the actuator It can be considered here that the ultrasound membrane wears over time. Thus, when measuring the motion or vibration of the ultrasound membrane, lower signal amplitudes can be achieved. By appropriate amplification of these measurement signals, the movement of the ultrasound membrane can be reliably detected.
  • the actuator preferably comprises a piezoelectric element.
  • An actuator comprising or formed by a piezoelectric element can be manufactured easily and inexpensively.
  • the piezoelectric element can be used to detect the mechanical vibration of the ultrasonic membrane.
  • the actuator can also be used as the measuring device.
  • the motor vehicle according to the invention comprises at least one ultrasonic sensor device according to the invention.
  • the motor vehicle is in particular as
  • the method according to the invention serves to operate an ultrasonic sensor device for a motor vehicle.
  • an actuator is controlled by means of a control device and an ultrasonic diaphragm is moved by means of the actuator.
  • an age of the ultrasonic sensor device is determined by means of the control device on the basis of a production date which is stored in a storage device of the ultrasonic sensor device.
  • FIG. 1 is a schematic representation of an ultrasonic sensor device according to an embodiment of the invention.
  • the ultrasound sensor device 1 represents a mechatronic system 1.
  • This mechatronic system comprises a mechanical component 2, which in the present case is designed as an ultrasound membrane 3.
  • the ultrasonic membrane 3 may be made of aluminum, for example.
  • the ultrasonic membrane 3 can be made of aluminum, for example.
  • the ultrasonic sensor device 1 comprises an actuator 4 with which the mechanical component 2 or the ultrasound membrane 3 can be moved.
  • the actuator 4 is designed to set the ultrasonic membrane 3 in mechanical vibrations.
  • the actuator 4 is designed as an electromechanical transducer, that is, it can convert an electrical input signal into a mechanical movement.
  • the actuator 4 is preferably connected to the mechanical component 2.
  • the actuator 4 comprises a piezoelectric element 5.
  • the Ultrasonic diaphragm 3 and the actuator 4 are at least partially in one
  • common housing 6 is arranged.
  • the ultrasonic sensor device 1 comprises a control device 7.
  • the control device 7 may be formed, for example, by a control device of the motor vehicle.
  • the control device 7 may have a microcontroller and / or a digital signal processor.
  • the control device 7 is connected to the ultrasonic sensor device 1 via an electrical connection or a data line. This is illustrated by way of example by the line 8.
  • the line 8 illustrates by way of example by the line 8.
  • Control device 7 electrically connected to the actuator 4. With the control device 7, a corresponding electrical signal for driving the actuator 4 can be output.
  • the control device 7 is provided as a separate component. But it can also be provided that the
  • Control device 7 is arranged in the housing 6.
  • the ultrasonic sensor device 1 comprises a memory device 9.
  • the memory device 9 is designed in particular as a non-volatile memory.
  • the production date of the ultrasonic sensor device 1 is stored. For this purpose, after the production of the
  • Ultrasonic sensor device 1 or at the end of manufacturing the production date are stored in the memory device 9. Furthermore, the
  • Ultrasonic sensor device 1 a temperature detection device 10, with which the temperature of the ultrasonic sensor device 1 and in particular the mechanical component 2 can be detected.
  • the temperature detection device 10 may for this purpose include a corresponding temperature sensor.
  • the ultrasonic sensor device 1 comprises a detection device 1 1, with which a number of activation processes of the actuator 4 can be detected. In other words, can be detected with the detection device 1 1, how often the actuator 4 has been turned on. For this purpose, it can be determined, for example, how often a corresponding
  • Control signal has been transmitted from the control device 7 to the actuator 4.
  • the piezoelectric element 5 serves not only as an actuator 4 but also as a measuring device 12. With the measuring device 12, a mechanical movement or a mechanical vibration of the mechanical component 2 or the ultrasonic diaphragm 3 can be detected.
  • the piezoelectric element 5 can first be subjected to an electrical voltage, as a result of which the mechanical component 2 or the ultrasound membrane 3 in FIG Oscillation is shifted. After a predetermined decay time, a mechanical vibration of the mechanical component 2 or the
  • Ultrasonic diaphragm 3 are detected. This can for example come from an echo of an ultrasonic signal, which is reflected by an object.
  • the piezoelectric element 5 converts the mechanical movement of the mechanical component 2 into an electrical signal, which can be evaluated by the control device 7.
  • the ultrasonic sensor device 1 When the ultrasonic sensor device 1 is operated, performance losses due to aging of the ultrasonic sensor device 1 and, in particular, the mechanical component 2 or the ultrasonic diaphragm 3 result over time.
  • the ultrasonic diaphragm 3, which is set in mechanical vibration, may over time wear out.
  • holding elements, on which the ultrasonic membrane 3 is held wear over time.
  • the age of the ultrasonic sensor device 1 the age of the
  • Ultrasonic sensor device 1 determined.
  • the production date is read from the memory device 9 by means of the control device 7.
  • the control device 7 can now determine the current date, for example, based on the data of a clock.
  • the control device 7 is designed to determine the age of the ultrasonic sensor device 1 and in particular of the ultrasonic diaphragm 3 on the basis of a comparison of the current date with the read-out production date.
  • an operating state of the ultrasonic sensor device 1 is to be determined, which describes to what extent the ultrasonic sensor device 1 has already aged or was claimed.
  • the age of the ultrasonic sensor device 1 is to be determined, which describes to what extent the ultrasonic sensor device 1 has already aged or was claimed.
  • Ultrasonic sensor device 1 the environmental influences that in the course of time on the
  • Ultrasonic sensor device 1 acted to be determined.
  • the control device 7 can read the data of the temperature detection device 10. For example, it can be determined how many times a predetermined one
  • Temperature threshold which can bear, for example, 90 ° C b has been exceeded. Furthermore, it can be taken into account which temperature fluctuations the
  • Ultrasonic sensor device 1 has been exposed. Another aspect to the
  • Determining the operating state of the ultrasonic sensor device 1 is the number of turn-on operations.
  • the control device 7 read out the data of the detection device 1 1.
  • it can be determined how often the actuator 4 has already been activated.
  • a counter may be provided which in
  • the counter can be increased. Even if the number of activation operations is above a certain threshold, the counter can be increased accordingly. In the other case, for example, if the actuator 4 was rarely activated, the count can be lowered. This can also be done, for example, if the
  • Temperature load of the ultrasonic sensor device 1 is within a predetermined range, in which only a slight influence of the ultrasonic sensor device 1 is expected.
  • the control of the actuator 4 can now be influenced by the control device 7 accordingly.
  • Ultrasonic sensor device 1 has reached a predetermined threshold, the electrical power with which the actuator 4 is driven, can be increased. Furthermore, it can be provided that a frequency of an electrical signal, with which the actuator 4 is controlled, is adjusted. In particular, in ultrasonic sensors, the
  • the resonance frequency of the mechanical component 2 and the ultrasonic diaphragm can reduce over time by mechanical wear. This usually small shift of the resonant frequency can be achieved by adjusting the frequency of the electrical
  • Control signal which is transmitted from the control device 7 to the actuator 4, are taken into account.
  • Ultrasonic sensor device 1 are taken into account when reading the measurement signals. For this purpose, for example, a measurement signal or a received signal, which is detected by the measuring device 12, can be increased from a predetermined operating state. In this way, the ultrasonic sensor device 1 can be reliably operated and its aging compensated.
  • FIG. 2 shows a schematic representation of a flow chart which describes a method for operating the ultrasonic sensor device 1.
  • the ultrasonic sensor device 1 is started. This can be done, for example, when the ignition of the motor vehicle is activated.
  • Sensor data read out. In this case, the production date can be read from the memory device 9 with the control device 7. Alternatively or additionally, the data of the temperature detection device 10 and the data of the detection device 1 1 can be read. On the basis of these data, the service life or operating state of the ultrasonic sensor device 1 or the mechatronic system is calculated in a step S3.
  • a step S4 the activation of the actuator 4 by means of the control device 7 or the evaluation of the measurement signals, which are transmitted from the measuring device 12 to the
  • Control device 7 are transmitted, adapted.
  • predefined aging data can be taken into account, which are provided in a step S5.
  • Temperature detection device 10 and the detection device 1 1 are taken into account.
  • the ultrasonic sensor device 1 can be reprogrammed accordingly. That is, the operating parameters for driving the actuator 4 by means of the control device 7 and for evaluating the measurement data, the of the
  • Measuring device 12 are transmitted to the control device 7, can be stored in the control device 7. Finally, in a step S7 results in an ultrasonic sensor device 1, which has the performance or performance of a new part.
  • the method for operating the ultrasonic sensor device 1 can basically be transferred to all mechatronic systems which have a mechanical component which is moved and is thus subject to wear. Thus, the aging of the mechatronic system can be reliably compensated.

Landscapes

  • 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)
  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)

Abstract

L'invention concerne un dispositif de détection par ultrasons (1) pour un véhicule automobile, comprenant une membrane à ultrasons (3), un actionneur (4) servant à déplacer la membrane à ultrasons (3) et une unité de commande (7) destinée à commander l'actionneur (4). Le dispositif de détection par ultrasons (1) possède un appareil de mémorisation (9) dans lequel est stockée une date de fabrication du dispositif de détection par ultrasons (1), et le dispositif de commande (7) est conçu pour déterminer un âge du dispositif de détection par ultrasons (1) au moyen de la date de fabrication mémorisée.
EP15741175.2A 2014-07-29 2015-07-22 Dispositif de détection par ultrasons pour un véhicule automobile, véhicule automobile et procédé Withdrawn EP3175261A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014110641.5A DE102014110641A1 (de) 2014-07-29 2014-07-29 Ultraschallsensoreinrichtung für ein Kraftfahrzeug, Kraftfahrzeug sowie Verfahren
PCT/EP2015/066708 WO2016016056A1 (fr) 2014-07-29 2015-07-22 Dispositif de détection par ultrasons pour un véhicule automobile, véhicule automobile et procédé

Publications (1)

Publication Number Publication Date
EP3175261A1 true EP3175261A1 (fr) 2017-06-07

Family

ID=53718010

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15741175.2A Withdrawn EP3175261A1 (fr) 2014-07-29 2015-07-22 Dispositif de détection par ultrasons pour un véhicule automobile, véhicule automobile et procédé

Country Status (3)

Country Link
EP (1) EP3175261A1 (fr)
DE (1) DE102014110641A1 (fr)
WO (1) WO2016016056A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200158868A1 (en) * 2017-06-06 2020-05-21 Mitsubishi Electric Corporation Object detection device
DE102022200145A1 (de) 2022-01-10 2023-07-13 Robert Bosch Gesellschaft mit beschränkter Haftung Verfahren zur Herstellung einer Vorrichtung mit einer Resonanzfrequenz

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7369458B2 (en) * 2004-05-10 2008-05-06 Airmar Technology Corporation Transducer identification
DE102005052633B4 (de) * 2005-11-04 2017-03-02 Robert Bosch Gmbh Verfahren zur Kalibrierung eines Ultraschallsensors und Ultraschallabstandsmessvorrichtung
DE102008043958A1 (de) * 2008-11-21 2010-05-27 Robert Bosch Gmbh Ultraschallwandler, Ultraschallsensor und Verfahren zum Betreiben eines Ultraschallsensors
DE102010039017B4 (de) * 2010-08-06 2017-09-21 Robert Bosch Gmbh Verfahren und Vorrichtung zur aktiven Dämpfung eines akustischen Wandlers
DE102012200592A1 (de) * 2012-01-17 2013-07-18 Robert Bosch Gmbh Verfahren und Vorrichtung zur Ermittlung eines Zustands eines Sensors

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2016016056A1 *

Also Published As

Publication number Publication date
WO2016016056A1 (fr) 2016-02-04
DE102014110641A1 (de) 2016-02-04

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