EP0384333A2 - Dispositif pour émission directionnelle et réception d'ultrason - Google Patents

Dispositif pour émission directionnelle et réception d'ultrason Download PDF

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Publication number
EP0384333A2
EP0384333A2 EP90103102A EP90103102A EP0384333A2 EP 0384333 A2 EP0384333 A2 EP 0384333A2 EP 90103102 A EP90103102 A EP 90103102A EP 90103102 A EP90103102 A EP 90103102A EP 0384333 A2 EP0384333 A2 EP 0384333A2
Authority
EP
European Patent Office
Prior art keywords
reflector
ultrasonic
reflector screen
screen
ultrasound
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Withdrawn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
EP90103102A
Other languages
German (de)
English (en)
Other versions
EP0384333A3 (fr
Inventor
Manfred Schoeller
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.)
Schoeller Transportautomation GmbH
Original Assignee
Schoeller Transportautomation 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 Schoeller Transportautomation GmbH filed Critical Schoeller Transportautomation GmbH
Publication of EP0384333A2 publication Critical patent/EP0384333A2/fr
Publication of EP0384333A3 publication Critical patent/EP0384333A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/26—Sound-focusing or directing, e.g. scanning
    • G10K11/28—Sound-focusing or directing, e.g. scanning using reflection, e.g. parabolic reflectors

Definitions

  • the invention relates to a device for directed transmission and for receiving ultrasound according to the preamble of patent claim 1.
  • the ultrasonic waves which follow roughly optical reflection laws, are directed from an emitter arranged in a parabolic reflector screen onto an object, a liquid surface, a wall or the like and from there reflected into an equally designed reflector screen and fed to a receiver. The elapsed time between sending and receiving is measured and converted into a distance.
  • Such devices encounter difficulties when they are to be used to detect obstacles, e.g. can be distributed by a driverless vehicle in a certain track width.
  • differences in the detection of these obstacles occur when their lateral distance from the axis of the sound lobe is uneven. This is based, among other things, on on the fact that such a sound lobe is usually elliptical on the floor, with the sound intensity decreasing sharply in peripheral zones.
  • the object of the present invention is now to to design a device of the type mentioned at the outset such that the sound profile, regardless of whether the ultrasound strikes an obstacle substantially perpendicularly or at an angle, is in the form of a band and is delimited by two lines running approximately parallel.
  • the ultrasound is concentrated, which concentrates the sound pressure in the area of the sound lobe thus formed, so that sound reflections can also be received from distances of several meters and also from obstacles with poor reflector properties.
  • a device can e.g. be guided around a driverless vehicle, the axial plane of the reflector screen being inclined downwards.
  • the ultrasound beam essentially forms on the floor as a band-shaped zone delimited by parallel edges. Obstacles are therefore recognized in all directions at the same distance from the vehicle.
  • the reflector strip helps to deflect the ultrasound waves coming from the ultrasound transmitter essentially onto the wall of the reflector screen as if they came from the focal point of the parabolic cross section. In this way, the concentration of the ultrasound is improved and the contours of the ultrasound lobe are tightened.
  • An improvement of the invention can be achieved in that the opening angle decreases with increasing distance from the apex line.
  • the device according to the invention can also be equipped so that the reflector strip parallel to the guideline of the reflector screen has a cross-sectional width which corresponds to 0.5 to 2 times the distance between the focal point and the guideline of the reflector screen.
  • the device according to the invention can also be designed such that the reflector strip has an essentially triangular profile. This is a particularly easy to manufacture shape for the reflector strip.
  • the device according to the invention can also be designed such that the reflector strip has a teardrop-shaped profile, the tapering region of which faces the apex line. This helps to improve the bundling.
  • the device according to the invention can also be designed such that the ultrasound transmitter and the ultrasound receiver are arranged at a distance from one another in series. The result of this is that the ultrasound receiver is ready to receive when the ultrasound is sent. It can therefore also receive ultrasound waves reflected from distances of a few centimeters, which is not possible if the ultrasound transmitter and the ultrasound receiver are combined in one unit, since a certain switchover time from transmission to reception is required here.
  • the device according to the invention can also be designed such that an ultrasound barrier is arranged between an ultrasound transmitter and the adjacent ultrasound receiver (s). In this way, it is prevented that ultrasound quasi like a short circuit ses is directed from the reflector strip directly to the ultrasound receiver.
  • the device according to the invention can also be equipped so that ultrasound monitoring sensors are provided in the wall of the reflector screen. In this way it can be monitored whether the ultrasound transmitter is actually transmitting.
  • the device according to the invention can also be designed such that the ultrasound monitoring sensors can be switched both as a transmitter and as a receiver. These sensors can be used to determine whether ultrasound is being emitted. They can also be used as transmitters to test the functionality of a receiver.
  • the device according to the invention can also be designed such that the ultrasound monitoring sensors are embedded flush in the wall of the reflector screen. In this way, the course of ultrasound waves between the monitoring sensor and the ultrasound transmitter and the ultrasound receiver is ensured in particular via the reflector strip.
  • the device according to the invention can also be designed such that the part of the reflector screen lying above the axial plane is shortened compared to the part lying below this axial plane.
  • the size of the device can be reduced without disadvantage if the area that is irradiated from the upper part of the reflector screen, which often occurs, is of little or no importance.
  • the device according to the invention can also be designed such that at least the part of the reflector screen lying below the axial plane is integrated into a bumper of a vehicle. In this way, the device can be particularly space-saving. B. be arranged on a driverless vehicle.
  • the device shown in FIGS. 1 and 2 has a reflector screen 1 with a smooth, sound-reflecting inner surface 2.
  • the inner surface 2 is parabolic, the distance between the focal point of the parabola and its guideline being between 8 and 30 mm.
  • the reflector screen 1 is trough-shaped and has the same profile shown here in FIG. 1 in all planes parallel to the line B-B.
  • Ultrasonic transmitter 4 and 5 ultrasonic receiver arranged.
  • An ultrasonic barrier 6 is provided between the ultrasonic transmitter 4 and the ultrasonic receiver 5, which ensures that sound waves emerging from the ultrasonic transmitter 4 cannot enter the ultrasonic receiver 5 directly.
  • a reflector strip 7 is arranged within the reflector screen 1, which runs symmetrically to the axial plane 8 'of the reflector screen 1.
  • the reflector strip 7 is drop-shaped, with its tapered region lying directly in front of the ultrasonic transmitters 4 and the ultrasonic receivers 5. It has an opening angle of 60 °.
  • the profile of the reflector strip 7 is formed in a circular arc shape at its rear end 8.
  • a monitoring sensor 9 with the inner surface 2 is flush with the wall of the reflector screen 1.
  • the monitoring sensor 9 can be switched in sequence as a transmitter or as a receiver.
  • Fig. 3 shows an embodiment of the device according to the invention, which differs from the one just described only in that here a reflector strip 10 is provided which has an essentially triangular profile, one edge of the profile being immediately in front of the ultrasound transmitters 4 and ultrasound receivers 5 .
  • ultrasonic locks 6 are provided between ultrasonic receivers and ultrasonic transmitters.
  • the embodiment according to FIG. 4 differs from that according to FIG. 3 only in the cross section of the reflector strip 11. This is also drop-shaped here, the opening angle decreasing starting from the region facing the apex line.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Transducers For Ultrasonic Waves (AREA)
EP19900103102 1989-02-20 1990-02-17 Dispositif pour émission directionnelle et réception d'ultrason Withdrawn EP0384333A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3905099 1989-02-20
DE19893905099 DE3905099C1 (fr) 1989-02-20 1989-02-20

Publications (2)

Publication Number Publication Date
EP0384333A2 true EP0384333A2 (fr) 1990-08-29
EP0384333A3 EP0384333A3 (fr) 1991-10-09

Family

ID=6374481

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900103102 Withdrawn EP0384333A3 (fr) 1989-02-20 1990-02-17 Dispositif pour émission directionnelle et réception d'ultrason

Country Status (2)

Country Link
EP (1) EP0384333A3 (fr)
DE (1) DE3905099C1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0737466A2 (fr) * 1995-04-14 1996-10-16 TEUCO GUZZINI S.r.l. Baignoire d'hydromassage avec des dispositifs d'émission d'ultrasons à faisceau large

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4435156C2 (de) * 1994-09-30 2002-06-27 Microsonic Ges Fuer Mikroelekt Ultraschallsensor
JP5995901B2 (ja) * 2014-03-31 2016-09-21 三菱電機株式会社 車載用超音波センサ

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR528145A (fr) * 1917-05-07 1921-11-07 Louis Lumiere Système d'appareil de réception et de transmission des ondes sonores
US1814022A (en) * 1925-03-07 1931-07-14 Elmer F Cassel Sound amplifying device
US3243768A (en) * 1962-06-01 1966-03-29 Jr Arthur H Roshon Integral directional electroacoustical transducer for simultaneous transmission and reception of sound

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1135231A (en) * 1965-02-10 1968-12-04 Furzehill Lab Ltd Improvements in or relating to distance testing apparatus
DE2744823C3 (de) * 1977-10-05 1980-06-12 G.H. Endress & Co, Basel (Schweiz) Sende-Empfangsanordnung fur Schalloder Ultraschallwellen fur die Abstandsmessung nach dem Echolotprinzip
US4208602A (en) * 1979-01-18 1980-06-17 Mediscan, Inc. Piezoelectric ultrasonic scanning head using a beryllium mirror
FR2472803A1 (fr) * 1979-12-27 1981-07-03 Bertin & Cie Procede d'adaptation des antennes d'un radar acoustique et dispositif pour la mise en oeuvre de ce procede
DE3320935A1 (de) * 1983-06-09 1984-12-13 Siemens AG, 1000 Berlin und 8000 München Ultraschall-sensor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR528145A (fr) * 1917-05-07 1921-11-07 Louis Lumiere Système d'appareil de réception et de transmission des ondes sonores
US1814022A (en) * 1925-03-07 1931-07-14 Elmer F Cassel Sound amplifying device
US3243768A (en) * 1962-06-01 1966-03-29 Jr Arthur H Roshon Integral directional electroacoustical transducer for simultaneous transmission and reception of sound

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0737466A2 (fr) * 1995-04-14 1996-10-16 TEUCO GUZZINI S.r.l. Baignoire d'hydromassage avec des dispositifs d'émission d'ultrasons à faisceau large
EP0737466A3 (fr) * 1995-04-14 1997-12-03 TEUCO GUZZINI S.r.l. Baignoire d'hydromassage avec des dispositifs d'émission d'ultrasons à faisceau large

Also Published As

Publication number Publication date
DE3905099C1 (fr) 1990-08-09
EP0384333A3 (fr) 1991-10-09

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