DE102019007215A1 - Device for determining a water level in an area surrounding a vehicle - Google Patents

Device for determining a water level in an area surrounding a vehicle Download PDF

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Publication number
DE102019007215A1
DE102019007215A1 DE102019007215.4A DE102019007215A DE102019007215A1 DE 102019007215 A1 DE102019007215 A1 DE 102019007215A1 DE 102019007215 A DE102019007215 A DE 102019007215A DE 102019007215 A1 DE102019007215 A1 DE 102019007215A1
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Germany
Prior art keywords
vehicle
determining
water level
ultrasonic sensor
area surrounding
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.)
Pending
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DE102019007215.4A
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German (de)
Inventor
Willi Dannenhauer
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Daimler Truck Holding AG
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Daimler AG
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Priority to DE102019007215.4A priority Critical patent/DE102019007215A1/en
Publication of DE102019007215A1 publication Critical patent/DE102019007215A1/en
Pending legal-status Critical Current

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    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
    • G01F23/296—Acoustic waves
    • G01F23/2962—Measuring transit time of reflected waves

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Acoustics & Sound (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)

Abstract

Die Erfindung betrifft eine Vorrichtung zum Bestimmen eines Wasserstands in einem Umgebungsbereich eines Fahrzeugs (5) mittels eines Ultraschallsensors (3), dessen Haupterfassungsrichtung (H) parallel zu einer Fahrzeughochachse (Z) nach unten verläuft. Erfindungsgemäß ist der Ultraschallsensor (3) in einem Kunststoffrohr (2) angeordnet, welches im Bereich eines Motorraums des Fahrzeugs (5) befestigt ist.The invention relates to a device for determining a water level in an area surrounding a vehicle (5) by means of an ultrasonic sensor (3), the main detection direction (H) of which runs downwards parallel to a vertical axis (Z) of the vehicle. According to the invention, the ultrasonic sensor (3) is arranged in a plastic tube (2) which is fastened in the area of an engine compartment of the vehicle (5).

Description

Die Erfindung betrifft eine Vorrichtung zum Bestimmen eines Wasserstands in einem Umgebungsbereich eines Fahrzeugs gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a device for determining a water level in an area surrounding a vehicle according to the preamble of claim 1.

Aus der DE 10 2013 009 858 A1 sind eine Vorrichtung und ein Verfahren zum Bestimmen eines Wasserstands in einem Umgebungsbereich eines Kraftfahrzeugs mittels einer Fahrerassistenzvorrichtung des Kraftfahrzeugs mit folgenden Schritten bekannt:

  • - Aussenden eines Sendesignals in den Umgebungsbereich des Kraftfahrzeugs mittels eines Ultraschallsensors der Fahrerassistenzvorrichtung, wobei die Haupterfassungsrichtung des Ultraschallsensors parallel zur Fahrzeughochachse orientiert ist,
  • - Empfangen eines in dem Umgebungsbereich reflektierten Signalanteils des Sendesignals als Empfangssignal, wobei das Empfangssignal mehrere Empfangsechos umfasst,
  • - Bestimmen eines zeitlichen Versatzes zwischen dem Sendesignal und einem Empfangsecho des Empfangssignals,
  • - Überprüfen, ob der zeitliche Versatz innerhalb eines vorgegebenen Wertebereichs um einen Versatzwert liegt, welcher einem Abstand eines Anbauteils des Kraftfahrzeugs zum Ultraschallsensor entspricht, und,
  • - falls der zeitliche Versatz außerhalb des vorgegebenen Wertebereichs liegt, Bestimmen des Wasserstands anhand des zeitlichen Versatzes,
  • - falls der zeitliche Versatz innerhalb des vorgegebenen Wertebereichs liegt, Bestimmen eines zeitlichen Versatzes zwischen dem Sendesignal und zumindest einem weiteren Empfangsecho des Empfangssignals für das Bestimmen des Wasserstands.
From the DE 10 2013 009 858 A1 a device and a method for determining a water level in a surrounding area of a motor vehicle by means of a driver assistance device of the motor vehicle with the following steps are known:
  • - Sending a transmission signal into the surrounding area of the motor vehicle by means of an ultrasonic sensor of the driver assistance device, the main detection direction of the ultrasonic sensor being oriented parallel to the vertical axis of the vehicle,
  • - Receiving a signal portion of the transmitted signal reflected in the surrounding area as a received signal, the received signal comprising a plurality of received echoes,
  • - Determining a time offset between the transmitted signal and a received echo of the received signal,
  • - Check whether the time offset lies within a specified value range around an offset value which corresponds to a distance between an add-on part of the motor vehicle and the ultrasonic sensor, and,
  • - if the time offset is outside the specified range of values, determining the water level using the time offset,
  • - If the time offset lies within the specified value range, determining a time offset between the transmission signal and at least one further received echo of the received signal for determining the water level.

Der Erfindung liegt die Aufgabe zu Grunde, eine gegenüber dem Stand der Technik verbesserte Vorrichtung zum Bestimmen eines Wasserstands in einem Umgebungsbereich eines Fahrzeugs anzugeben.The invention is based on the object of specifying a device for determining a water level in an area surrounding a vehicle which is improved over the prior art.

Die Aufgabe wird erfindungsgemäß gelöst mit einer Vorrichtung, welche die im Anspruch 1 angegebenen Merkmale aufweist.The object is achieved according to the invention with a device which has the features specified in claim 1.

Eine Vorrichtung zum Bestimmen eines Wasserstands in einem Umgebungsbereich eines Fahrzeugs umfasst einen Ultraschallsensor, dessen Haupterfassungsrichtung parallel zu einer Fahrzeughochachse nach unten verläuft.A device for determining a water level in a surrounding area of a vehicle comprises an ultrasonic sensor, the main detection direction of which runs parallel to a vertical axis of the vehicle downwards.

Erfindungsgemäß ist der Ultraschallsensor in einem Kunststoffrohr angeordnet, welches im Bereich eines Motorraums des Fahrzeugs befestigt ist.According to the invention, the ultrasonic sensor is arranged in a plastic tube which is fastened in the area of an engine compartment of the vehicle.

Bei einer solchen Anordnung ist der Ultraschallsensor besonders gut vor Störeinflüssen, wie beispielsweise einzelnen Wassertropfen, einem Wasserschwall sowie Geräuschen, geschützt. Weiterhin ist die Vorrichtung einfach und kostengünstig realisierbar und zeichnet sich durch eine hohe Zuverlässigkeit aus. Die Vorrichtung ist dabei in beliebigen Fahrzeugen einsetzbar und ermöglicht beispielsweise eine Überwachung einer Watttiefe des Fahrzeugs.With such an arrangement, the ultrasonic sensor is particularly well protected from interfering influences, such as, for example, individual drops of water, a surge of water and noises. Furthermore, the device is simple and inexpensive to implement and is characterized by high reliability. The device can be used in any vehicle and enables, for example, a monitoring of a wading depth of the vehicle.

Ausführungsbeispiele der Erfindung werden im Folgenden anhand von Zeichnungen näher erläutert.Embodiments of the invention are explained in more detail below with reference to drawings.

Dabei zeigen:

  • 1 schematisch eine Draufsicht einer Anordnung mit einem Kunststoffrohr und einem Ultraschallsensor,
  • 2 schematisch eine Schnittdarstellung der Anordnung gemäß 1 und
  • 3 schematisch ein Fahrzeug mit einer Anordnung gemäß 1.
Show:
  • 1 schematically a top view of an arrangement with a plastic tube and an ultrasonic sensor,
  • 2 schematically a sectional view of the arrangement according to 1 and
  • 3 schematically a vehicle with an arrangement according to 1 .

Einander entsprechende Teile sind in allen Figuren mit den gleichen Bezugszeichen versehen.Corresponding parts are provided with the same reference symbols in all figures.

In 1 ist eine Draufsicht einer Anordnung 1 mit einem Kunststoffrohr 2 und einem Ultraschallsensor 3 dargestellt. 2 zeigt eine Schnittdarstellung der Anordnung 1 gemäß 1. Der Ultraschallsensor 3 ist derart mittels eines Befestigungssteges 4 an einer oberen Öffnung O1 des Kunststoffrohres 2 befestigt, dass die Öffnung O1 zumindest teilweise geöffnet bleibt. In 3 ist ein Fahrzeug 5 dargestellt, welches die Anordnung 1 umfasst. Weiterhin ist ein Fahrzeugkoordinatensystem mit einer Fahrzeuglängsachse X, einer Fahrzeugquerachse Y und einer Fahrzeughochachse Z dargestellt.In 1 Figure 3 is a plan view of an assembly 1 with a plastic tube 2 and an ultrasonic sensor 3 shown. 2 shows a sectional view of the arrangement 1 according to 1 . The ultrasonic sensor 3 is so by means of a fastening web 4th at an upper opening O1 of the plastic pipe 2 attached that opening O1 remains at least partially open. In 3 is a vehicle 5 shown which the arrangement 1 includes. Furthermore, a vehicle coordinate system with a vehicle longitudinal axis X, a vehicle transverse axis Y and a vehicle vertical axis Z is shown.

Die Anordnung 1 ist in einem Motorraum des Fahrzeugs 5 angeordnet und Bestandteil einer Vorrichtung zum Bestimmen eines Wasserstands in einem Umgebungsbereich des Fahrzeugs 5. Dabei sind der Ultraschallsensor 3 und das Kunststoffrohr 2 derart in dem Fahrzeug 5 angeordnet, dass dessen Haupterfassungsrichtung H parallel zur Fahrzeughochachse Z nach unten in Richtung einer unteren Öffnung 02 des Kunststoffrohres 2 verläuft und somit bei einer Durchfahrung von Wasser W ausgesendete Ultraschallwellen zumindest im Wesentlichen von oben auf eine Wasseroberfläche treffen.The order 1 is in an engine room of the vehicle 5 arranged and part of a device for determining a water level in a surrounding area of the vehicle 5 . Here are the ultrasonic sensor 3 and the plastic pipe 2 such in the vehicle 5 arranged that its main detection direction H parallel to the vehicle vertical axis Z downwards in the direction of a lower opening 02 of the plastic pipe 2 runs and thus when passing through water W. emitted ultrasonic waves strike a water surface at least essentially from above.

Zur Ermittlung des Wasserstands ist als Referenz R je nach Fahrzustand beispielsweise eine Fahrbahn FB, auf welcher sich das Fahrzeug 5 befindet, festgelegt.To determine the water level, a reference R is, for example, depending on the driving state roadway FB on which the vehicle is 5 is located.

BezugszeichenlisteList of reference symbols

11
Anordnungarrangement
22
KunststoffrohrPlastic pipe
33
UltraschallsensorUltrasonic sensor
44th
BefestigungsstegFastening bar
55
Fahrzeug vehicle
FBFB
Fahrbahnroadway
HH
HaupterfassungsrichtungMain detection direction
O1O1
obere Öffnungupper opening
0202
untere Öffnunglower opening
RR.
Referenzreference
WW.
Wasserwater
XX
FahrzeuglängsachseVehicle longitudinal axis
YY
FahrzeugquerachseVehicle transverse axis
ZZ
FahrzeughochachseVehicle vertical axis

ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDED IN THE DESCRIPTION

Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Zitierte PatentliteraturPatent literature cited

  • DE 102013009858 A1 [0002]DE 102013009858 A1 [0002]

Claims (1)

Vorrichtung zum Bestimmen eines Wasserstands in einem Umgebungsbereich eines Fahrzeugs (5) mittels eines Ultraschallsensors (3), dessen Haupterfassungsrichtung (H) parallel zu einer Fahrzeughochachse (Z) nach unten verläuft, dadurch gekennzeichnet, dass der Ultraschallsensor (3) in einem Kunststoffrohr (2) angeordnet ist, welches im Bereich eines Motorraums des Fahrzeugs (5) befestigt ist.Device for determining a water level in an area surrounding a vehicle (5) by means of an ultrasonic sensor (3), the main detection direction (H) of which runs downwards parallel to a vertical axis (Z) of the vehicle, characterized in that the ultrasonic sensor (3) is in a plastic tube (2 ) is arranged, which is attached in the area of an engine compartment of the vehicle (5).
DE102019007215.4A 2019-10-17 2019-10-17 Device for determining a water level in an area surrounding a vehicle Pending DE102019007215A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE102019007215.4A DE102019007215A1 (en) 2019-10-17 2019-10-17 Device for determining a water level in an area surrounding a vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019007215.4A DE102019007215A1 (en) 2019-10-17 2019-10-17 Device for determining a water level in an area surrounding a vehicle

Publications (1)

Publication Number Publication Date
DE102019007215A1 true DE102019007215A1 (en) 2020-08-27

Family

ID=72138600

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Application Number Title Priority Date Filing Date
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R081 Change of applicant/patentee

Owner name: DAIMLER TRUCK AG, DE

Free format text: FORMER OWNER: DAIMLER AG, 70327 STUTTGART, DE

Owner name: DAIMLER AG, DE

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Owner name: DAIMLER TRUCK AG, DE

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