DE3903501A1 - Optical distance measuring apparatus for vehicles - Google Patents
Optical distance measuring apparatus for vehiclesInfo
- Publication number
- DE3903501A1 DE3903501A1 DE3903501A DE3903501A DE3903501A1 DE 3903501 A1 DE3903501 A1 DE 3903501A1 DE 3903501 A DE3903501 A DE 3903501A DE 3903501 A DE3903501 A DE 3903501A DE 3903501 A1 DE3903501 A1 DE 3903501A1
- Authority
- DE
- Germany
- Prior art keywords
- unit
- vehicles
- signal
- measurement
- evaluation
- 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- Withdrawn
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 13
- 238000011156 evaluation Methods 0.000 claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims abstract description 13
- 230000005855 radiation Effects 0.000 claims abstract description 12
- 238000005259 measurement Methods 0.000 claims abstract description 11
- 230000007613 environmental effect Effects 0.000 claims abstract description 5
- 239000004065 semiconductor Substances 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims abstract 2
- 238000001514 detection method Methods 0.000 claims description 4
- 230000000007 visual effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 210000001525 retina Anatomy 0.000 description 2
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000003828 downregulation Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003827 upregulation Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
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
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
-
- 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
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/88—Lidar systems specially adapted for specific applications
- G01S17/93—Lidar systems specially adapted for specific applications for anti-collision purposes
- G01S17/931—Lidar 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
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/483—Details of pulse systems
- G01S7/486—Receivers
- G01S7/4868—Controlling received signal intensity or exposure of sensor
-
- 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
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/497—Means for monitoring or calibrating
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Electromagnetism (AREA)
- Optical Radar Systems And Details Thereof (AREA)
Abstract
Description
Die Erfindung betrifft eine Einrichtung zur optischen Abstandsmessung für Fahrzeuge mittels eines Meßgerätes gemäß dem Gattungsbegriff des Anspruchs 1. Die Erfindung geht dabei aus von einem Stand der Technik wie er, insbesondere in der Deutschen Offenlegungsschrift 33 35 869 be schrieben ist. Bei dieser Einrichtung werden zum Eliminieren eines op tischen Hintergrundrauschens optische Filter eingesetzt. Da Filter ab schwächend wirken, ist eine höhere Sendeleistung erforderlich.The invention relates to a device for optical distance measurement for vehicles using a measuring device according to the generic term of Claim 1. The invention is based on a prior art as he, especially in the German Offenlegungsschrift 33 35 869 be is written. With this facility, to eliminate an op table background noise optical filters used. Because filters off weakening, a higher transmission power is required.
Aus der DE 36 40 449 C1 ist eine Einrichtung zum Bestimmen der Entfer nung zwischen zwei Objekten wie Kraftfahrzeugen bekannt, bei der statt Filter elektronische Mittel zur Eliminierung von Hintergrundrauschen vorgesehen sind.DE 36 40 449 C1 describes a device for determining the distance voltage between two objects known as motor vehicles at which instead Filters electronic means to eliminate background noise are provided.
Aufgabe der Erfindung ist es, ein optisches Abstands-Meßgerät für Fahr zeuge zu schaffen, daß einen Laser als optischen Sender verwendet, des sen Strahlung gut empfangen und erkannt werden kann und dessen Leistung sich nach Umweltbedingungen und dem Augenschutz von Personen, insbeson dere in Fahrzeugen vor unangenehmer oder gar schädlicher Laserstrahlung richtet. Diese Aufgabe wird durch die in Anspruch 1 angegebene Lösung erfüllt.The object of the invention is to provide an optical distance measuring device for driving to create that uses a laser as an optical transmitter, the radiation can be easily received and recognized and its performance according to environmental conditions and the eye protection of people, in particular especially in vehicles from unpleasant or even harmful laser radiation judges. This object is achieved by the solution specified in claim 1 Fulfills.
Unterhalb von 1,3 µm tritt eine Schädigung der Netzhaut ein, wenn Strahlung in diesem Bereich durch die Linse des Auges auf die Netzhaut fokussiert wird. Die Erfindung vermeidet dies durch angepasste Herab setzung der Laserstrahlungsenergie.Damage to the retina below 1.3 µm occurs when Radiation in this area through the lens of the eye to the retina is focused. The invention avoids this by adapting down setting of laser radiation energy.
Aus- und Weiterbildungen der Erfindung sind in weiteren Ansprüchen ange geben und in der nachfolgenden Beschreibung ist ein Ausführungsbeispiel der Erfindung anhand der Zeichnungen erläutert. Es zeigen:Training and further developments of the invention are set forth in further claims give and in the following description is an embodiment the invention explained with reference to the drawings. Show it:
Fig. 1 ein Blockschaltbild eines Ausführungsbeispiels in schematischer Darstellung; Fig. 1 is a block diagram of an embodiment in a schematic representation;
Fig. 2a ein Diagramm bezüglich der Herabregelung der Energie bei hohem Signal im Nahbereich; FIG. 2a is a graph relating to the down-regulation of the energy at high signal at close range;
Fig. 2b ein Diagramm bezüglich der Hinaufregelung der Energie bei schlechten Sichtbedingungen; Figure 2b is a graph relating to the Up regulation of the energy in low visibility conditions.
Fig. 3 ein Ausführungsbeispiel des Einbaus der Sende- und Empfangsein heit in einem Fahrzeug. Fig. 3 shows an embodiment of the installation of the transmitting and receiving unit in a vehicle.
Die in Fig. 1 skizzierte Einrichtung zur optischen Abstandsmessung setzt sich aus einem Sender 11 und einem Empfänger 13 zusammen, denen eine Einrichtung zur Signalauswertung 14 zugeordnet ist. Als Sender 11 dient vorzugsweise ein gepulster Halbleiterlaser, insbesondere Laserdiode des GaAs oder GaAlAs-Typs von einer Wellenlänge 0,8 µm bis 1,0 µm, ins besondere 810-950 nm, dessen ausgesendeter Strahl 12 von einem Hinder nis reflektiert wird und als Signal 12 a vom Empfänger aufgenommen und der Einheit zur Signalauswertung 14 zugeleitet wird und entsprechend der Pulsmodulation sicher erkannt wird durch Unterscheidung von Hintergrund rauschen. Diese ist einmal eine Einrichtung zur Signalbewertung 15, eine Meßgrößen-Anzeigeeinrichtung 17 und eine Signaleinheit 18 zugeordnet. Erstere Einheit 15 führt eine Bewertung in bezug auf Abstand, Amplitude und Augensicherheit, entweder einzeln oder gemeinsam durch und gibt das Bewertungsergebnis als Signal einer Energiesteuereinheit 16 weiter, die dementsprechend den Sendestrahl 12 des Senders 11 regelt. Das heißt: Die Ausgangsleistung und/oder die Ausgangsenergie des Senderlasers wird ent sprechend dem von der Empfangseinheit 13 durch den reflektierten Strahl 12 a detektierten Abstand eines Zieles durch die Energiesteuereinheit 16 auf ein Minimum geregelt, weil gute Sichtbedingungen etc. eine Reduzie rung der Laserausgangsleistung bzw. der Laserausgangsenergie zulassen. Die Leistungsregelung ist sich selbstanpassend - autoadaptiv - an die jeweiligen Bedingungen ausgeführt, mit Hilfe eines Rechners wie MC oder MP und "lernfähigem" Speicher für die nötigen Informationen. The device for optical distance measurement outlined in FIG. 1 is composed of a transmitter 11 and a receiver 13 , to which a device for signal evaluation 14 is assigned. The transmitter 11 is preferably a pulsed semiconductor laser, in particular laser diode of the GaAs or GaAlAs type with a wavelength of 0.8 μm to 1.0 μm, in particular 810-950 nm, the emitted beam 12 of which is reflected by an obstacle and as a signal 12 a is picked up by the receiver and fed to the unit for signal evaluation 14 and is reliably detected in accordance with the pulse modulation by distinguishing background noise. This is assigned a device for signal evaluation 15 , a measured variable display device 17 and a signal unit 18 . The former unit 15 carries out an evaluation with regard to distance, amplitude and eye safety, either individually or jointly, and forwards the evaluation result as a signal from an energy control unit 16 , which accordingly regulates the transmission beam 12 of the transmitter 11 . That means: The output power and / or the output energy of the transmitter laser is regulated accordingly to a minimum by the receiving unit 13 by the reflected beam 12 a detected distance of a target by the energy control unit 16 because good visibility conditions etc. reduce the laser output power or allow the laser output energy. The power control is self-adapting - auto-adaptive - to the respective conditions, with the help of a computer such as MC or MP and "learnable" memory for the necessary information.
Liegen nun schlechte Sichtverhältnisse vor oder verschlechtern sich die gegebenen Sichtverhältnisse, beispielsweise durch beginnenden Regen, Rauch oder aufziehenden Nebel, so stellt dies die Einheit zur Signalaus wertung 14 im Zusammenhang mit der Einrichtung zur Signalbewertung 15 fest und leitet das entprechend bewertete Empfangssignal 12 a der Ener giesteuerung 16 zu, die nun den Lasersendestrahl 12 auf ein entsprechen des Maximum höher regelt. Dieses Maximum bezieht sich jeweils auf die Ausgangsleistung oder die Ausgangsenergie oder auf Energie und Leistung. Hierbei wird das Signal-/Rauschverhältnis deutlich verbessert. Die Maxi malleistung richtet sich jedoch nach der Augensicherheit des Sendelasers (Verträglichkeit der Strahlung). Wenn z.B. starker Nebel oder dgl. herrscht, so ergibt sich für die Strahlung eine entsprechend den Umwelt bedingungen eine verstärkte Dämpfung, oder eine verringerte Transmis sion, welche eine höhere Sendeleistung für den Laser gestattet.If there are poor visibility conditions or the visibility conditions deteriorate, for example due to the onset of rain, smoke or rising fog, this determines the unit for signal evaluation 14 in connection with the device for signal evaluation 15 and conducts the correspondingly evaluated reception signal 12 a of the energy source Casting control 16 , which now regulates the laser transmission beam 12 to a correspondingly higher maximum. This maximum relates in each case to the output power or the output energy or to energy and power. The signal-to-noise ratio is significantly improved. However, the maximum power depends on the eye safety of the transmitter laser (radiation tolerance). If, for example, there is heavy fog or the like, the radiation has an increased attenuation or a reduced transmission which corresponds to the environmental conditions, which allows a higher transmission power for the laser.
Beide Fälle sind durch die Diagramme in den Fig. 2a und 2b angedeutet.Both cases are indicated by the diagrams in FIGS. 2a and 2b.
Nun ist das vorgeschlagene Abstandsmeßgerät 10 so konzipiert, daß dessen Sendeeinheit 11 bei Detektierung einer Unterschreitung eines vorgegebe nen Mindestabstandes automatisch abgeschaltet wird und daß die Signal auswertung 14 außerdem bei Unterschreitung von vorgegebenen Mindestmeß bedingungen und/oder Erkennung einer zu einer Fehlinterpretation führen den Meßbedingung die Signaleinheit 18 ansteuert, durch die ein optisches oder akustisches Warnsignal gegeben wird. Das optische Warnsignal kann gegebenenfalls auch durch die Meßgrößen-Anzeigeeinrichtung 17 erfolgen. Es ist aber auch vorgesehen, daß die Signaleinheit 18 zusätzlich eine Schaltfunktion übernimmt, beispielsweise das Abblendlicht oder die Ne belleuchten oder die Scheibenwischer aktiviert, ggfs. auch die Fahrge schwindigkeit regelt, z.B. verzögert, bremst, stoppt, durch Eingriff in den Antrieb, die Kraftübertragung, wie autom. Getriebe, oder Brems system. Besonders vorteilhaft anwendbar ist die Erfindung für Fahrzeuge, die in Kolonnen z.B. auf der Bundesautobahn möglichst dicht und mit gleichbleibendem Abstand fahren (Projekt "Convoy"). Now, the proposed distance measuring device 10 is designed so that its transmitter unit 11 is automatically switched off upon detection of falling below a predetermined minimum distance and that the signal evaluation 14 also falls below specified minimum measurement conditions and / or detection of a misinterpretation lead to the measurement condition of the signal unit 18 controls, by which an optical or acoustic warning signal is given. The optical warning signal can optionally also be given by the measured variable display device 17 . However, it is also provided that the signal unit 18 additionally takes on a switching function, for example the low beam or the ne lamps or the windshield wipers activated, possibly also regulating the speed, for example decelerating, braking, stopping, by intervention in the drive, the power transmission how autom. Transmission or braking system. The invention can be used particularly advantageously for vehicles which drive as close as possible in columns, for example on the federal highway, and at a constant distance ("Convoy" project).
In Fig. 3 ist ersichtlich, daß die Einrichtung zur optischen Abstands messung in dem Fahrzeug 101 in dessen Frontbereich eingebaut ist und quer zur Straße, insbesondere linienhaft angeordnet ist, d.h. die Ein richtung 102 stellt einen Querbalken quer zur Fahrtrichtung dar mit mehreren Sendern 103 und Empfängern 104 für die rückgestreute Strahlung, die sie der Auswerteeinrichtung entweder in 102 oder dem Bordcomputer mit entsprechender Einrichtung zuführt. Letzterer kann auch nur die Ab standsanzeige enthalten. Die Entfernung wird bestimmt nach dem Laufzeit unterschied zwischen ausgesandter Strahlung 106 und reflektierter Strah lung 105. Reflektiert wird die Strahlung von dem vorausfahrenden Fahr zeug 201, insbesondere dessen Heckpartie. Bei Unterschreitung eines be stimmten Mindestabstandes je nach Fahrgeschwindigkeit bzw. Relativge schwindigkeit zwischen zweitem und erstem Fahrzeug und je nach Umweltbe dingungen, insbesondere Sichtbedingungen, wird zunächst ein optisches und/oder akustisches Signal vom Bordcomputer, insbesondere im Bereich des Armaturenbretts oder sonst in Fahrernähe abgegeben und ggfs. auch eine Geschwindigkeitsverminderung bis hin zur Motorabschaltung und/oder Bremsung eingeleitet je nach Kraftübertragung bzw. Antriebs-/Abtriebs einheit des Fahrzeuges, Bremskreisen und weiterer nötiger bzw. förder licher Einrichtungen.In Fig. 3 it can be seen that the device for optical distance measurement in the vehicle 101 is installed in its front region and is arranged transversely to the road, in particular linearly, that is, a device 102 represents a crossbar transverse to the direction of travel with several transmitters 103 and Receivers 104 for the backscattered radiation, which it supplies to the evaluation device either in 102 or to the on-board computer with the corresponding device. The latter can only contain the status indicator. The distance is determined according to the transit time difference between emitted radiation 106 and reflected radiation 105 . The radiation is reflected by the vehicle driving ahead 201 , in particular its rear end. If a certain minimum distance is undershot depending on the driving speed or relative speed between the second and first vehicle and depending on the environmental conditions, in particular visibility conditions, an optical and / or acoustic signal is first emitted by the on-board computer, especially in the area of the dashboard or otherwise near the driver, and If necessary, a speed reduction up to engine shutdown and / or braking initiated depending on the power transmission or drive / output unit of the vehicle, brake circuits and other necessary or promotional facilities.
Die Einrichtung mit mehreren Sendern und Empfängern als Querbalken-Ein heit 102 hat den Vorteil auch seitlich, bei Kurvenfahren etc., insbeson dere Kolonnenfahrten zu ermöglichen, d.h. dem vorausfahrenden Fahrzeug zu folgen.The device with several transmitters and receivers as a crossbar unit 102 has the advantage also laterally, when cornering etc., in particular to enable column trips, ie to follow the vehicle ahead.
Eine Plausibilitätskontrolle des Rechners ist vorteilhaft für die Erken nung.A plausibility check of the computer is advantageous for the branches nung.
Der vorgeschlagene Lasertyp (Halbleiter oder Festkörper) weist hier (Fig. 3) eine breite Sendekeule auf.The proposed type of laser (semiconductor or solid) has here ( FIG. 3) a broad transmission lobe.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3903501A DE3903501A1 (en) | 1988-02-10 | 1989-02-06 | Optical distance measuring apparatus for vehicles |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE3804002 | 1988-02-10 | ||
DE3903501A DE3903501A1 (en) | 1988-02-10 | 1989-02-06 | Optical distance measuring apparatus for vehicles |
Publications (1)
Publication Number | Publication Date |
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DE3903501A1 true DE3903501A1 (en) | 1989-08-24 |
Family
ID=25864727
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE3903501A Withdrawn DE3903501A1 (en) | 1988-02-10 | 1989-02-06 | Optical distance measuring apparatus for vehicles |
Country Status (1)
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DE (1) | DE3903501A1 (en) |
Cited By (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3912398A1 (en) * | 1989-04-15 | 1990-10-18 | Bayerische Motoren Werke Ag | OBJECT DETECTING DEVICE FOR MOTOR VEHICLES |
DE3941402A1 (en) * | 1989-12-15 | 1991-06-20 | Asea Brown Boveri | Collision warning system for vehicle - evaluates transmitted HF signal modulated with information representative of vehicle speed and acceleration |
DE4028788A1 (en) * | 1990-09-11 | 1992-03-12 | Bayerische Motoren Werke Ag | LASER BEAM DEVICE II |
DE4028789A1 (en) * | 1990-09-11 | 1992-03-12 | Bayerische Motoren Werke Ag | Laser radiator in motor vehicle ror obstacle detection - has reflection detector for laser beam having elongated cross=section of greater height than width in projection plane |
DE4036174A1 (en) * | 1990-11-14 | 1992-05-21 | Nestor F Dr Med Buanga | Automatically-activated vehicle braking system - uses laser beams to measure relative spacing between vehicles for activating velocity-dependent braking |
DE4124192A1 (en) * | 1991-07-20 | 1993-01-21 | Dornier Luftfahrt | Optical rangefinder for spacing between moving road vehicles - measures propagation time of infrared reflection from preceding vehicle, and gives warning of too near approach |
DE4444828A1 (en) * | 1994-12-15 | 1996-06-20 | Bayerische Motoren Werke Ag | Safeguard for laser operated distance measurer in motor vehicle |
DE19707936A1 (en) * | 1997-02-27 | 1998-09-03 | Volkswagen Ag | Obstacle distance detection arrangement for motor vehicle |
DE19717399A1 (en) * | 1997-04-24 | 1999-06-17 | Spies Martin Dipl Ing Fh | Arrangement for determining the distances and types of objects, e.g. vehicles |
DE10140096A1 (en) * | 2001-08-16 | 2003-02-27 | Conti Temic Microelectronic | Procedure for operating an active obstacle warning system |
WO2003036328A1 (en) * | 2001-10-22 | 2003-05-01 | Ibeo Automobile Sensor Gmbh | Optoelectronic detection device |
EP1347307A1 (en) * | 2002-03-21 | 2003-09-24 | Peugeot Citroen Automobiles SA | Traffic monitoring method for road vehicle adapting itself to the state and nature of the coating |
EP1347308A1 (en) * | 2002-03-21 | 2003-09-24 | Peugeot Citroen Automobiles SA | On board traffic monitoring device |
US6856919B1 (en) | 1999-03-11 | 2005-02-15 | Volkswagen Ag | Device with at least one laser sensor and method of operating a laser sensor |
US6870622B2 (en) | 2000-03-28 | 2005-03-22 | Siemens Aktiengesellschaft | Method and device for monitoring electric components in a pick-and-place device for substrates |
WO2005090123A1 (en) * | 2004-03-18 | 2005-09-29 | Robert Bosch Gmbh | Method and device for improving the visibility in a vehicle |
US7022970B2 (en) | 2000-03-28 | 2006-04-04 | Siemens Aktiengellschaft | Device and method for detecting an object or a person in the passenger compartment of a vehicle |
DE102004062085A1 (en) * | 2004-12-23 | 2006-07-20 | Daimlerchrysler Ag | Windshield wiper controller for motor vehicle, has control device evaluating brake signals of vehicle, and windshield wiper driven by motor is activated upon detection of full brake application of vehicle |
DE19822180B4 (en) * | 1997-05-26 | 2007-08-02 | Volkswagen Ag | Device for controlling a windshield wiper system, in particular for motor vehicles |
DE102006008139A1 (en) * | 2006-02-20 | 2007-08-23 | Adc Automotive Distance Control Systems Gmbh | Sensor for environment monitoring in motor vehicle, comprises dynamic detection area, which is controlled depending on situation, where motor vehicle has device for speed and heading angle regulation |
EP2085790A1 (en) | 2008-02-04 | 2009-08-05 | Valeo Vision | Method of detecting an eye with a light beam emitted by a vehicle |
EP3460488A1 (en) * | 2017-09-22 | 2019-03-27 | Rosemount Aerospace Inc. | Automatic gain control for laser detector |
EP3470877A1 (en) * | 2017-10-16 | 2019-04-17 | Rosemount Aerospace Inc. | Hard target detection for optical systems |
EP3809157A1 (en) * | 2019-10-15 | 2021-04-21 | Sick Ag | Distance-measuring optoelectronic sensor and method for detecting a target object |
US11579260B2 (en) | 2017-09-22 | 2023-02-14 | Rosemount Aerospace Inc. | Multiple operational modes for aircraft laser sensing systems |
Citations (1)
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DE3335869A1 (en) * | 1982-10-05 | 1984-04-05 | Nissan Motor Co., Ltd., Yokohama, Kanagawa | Optical radar device for vehicles |
-
1989
- 1989-02-06 DE DE3903501A patent/DE3903501A1/en not_active Withdrawn
Patent Citations (1)
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DE3335869A1 (en) * | 1982-10-05 | 1984-04-05 | Nissan Motor Co., Ltd., Yokohama, Kanagawa | Optical radar device for vehicles |
Non-Patent Citations (1)
Title |
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Riegl, Johannes: "Optische Miniatur-Impulsradar- geräte in der Kfz- und Filmtechnik" in DE-Z.: Elektronik 1974, H. 2, Bd. 23, S. 49-54, "Autos am laufenden Band" in DE-Z.: Funkschau 14/1988, S. 42-44 * |
Cited By (38)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3912398A1 (en) * | 1989-04-15 | 1990-10-18 | Bayerische Motoren Werke Ag | OBJECT DETECTING DEVICE FOR MOTOR VEHICLES |
DE3941402A1 (en) * | 1989-12-15 | 1991-06-20 | Asea Brown Boveri | Collision warning system for vehicle - evaluates transmitted HF signal modulated with information representative of vehicle speed and acceleration |
DE4028788A1 (en) * | 1990-09-11 | 1992-03-12 | Bayerische Motoren Werke Ag | LASER BEAM DEVICE II |
DE4028789A1 (en) * | 1990-09-11 | 1992-03-12 | Bayerische Motoren Werke Ag | Laser radiator in motor vehicle ror obstacle detection - has reflection detector for laser beam having elongated cross=section of greater height than width in projection plane |
DE4036174A1 (en) * | 1990-11-14 | 1992-05-21 | Nestor F Dr Med Buanga | Automatically-activated vehicle braking system - uses laser beams to measure relative spacing between vehicles for activating velocity-dependent braking |
DE4124192A1 (en) * | 1991-07-20 | 1993-01-21 | Dornier Luftfahrt | Optical rangefinder for spacing between moving road vehicles - measures propagation time of infrared reflection from preceding vehicle, and gives warning of too near approach |
DE4444828A1 (en) * | 1994-12-15 | 1996-06-20 | Bayerische Motoren Werke Ag | Safeguard for laser operated distance measurer in motor vehicle |
DE19707936A1 (en) * | 1997-02-27 | 1998-09-03 | Volkswagen Ag | Obstacle distance detection arrangement for motor vehicle |
DE19717399A1 (en) * | 1997-04-24 | 1999-06-17 | Spies Martin Dipl Ing Fh | Arrangement for determining the distances and types of objects, e.g. vehicles |
DE19717399C2 (en) * | 1997-04-24 | 2001-05-23 | Martin Spies | Device for determining the distance and type of objects and the visibility |
DE19822180B4 (en) * | 1997-05-26 | 2007-08-02 | Volkswagen Ag | Device for controlling a windshield wiper system, in particular for motor vehicles |
US6856919B1 (en) | 1999-03-11 | 2005-02-15 | Volkswagen Ag | Device with at least one laser sensor and method of operating a laser sensor |
US6870622B2 (en) | 2000-03-28 | 2005-03-22 | Siemens Aktiengesellschaft | Method and device for monitoring electric components in a pick-and-place device for substrates |
US7022970B2 (en) | 2000-03-28 | 2006-04-04 | Siemens Aktiengellschaft | Device and method for detecting an object or a person in the passenger compartment of a vehicle |
DE10140096A1 (en) * | 2001-08-16 | 2003-02-27 | Conti Temic Microelectronic | Procedure for operating an active obstacle warning system |
WO2003019232A1 (en) * | 2001-08-16 | 2003-03-06 | Conti Temic Microelectronic Gmbh | Method for operating an active obstacle warning system |
US6987447B2 (en) | 2001-08-16 | 2006-01-17 | Conti Temic Microelectronic Gmbh | Method of operating an active obstacle warning system |
WO2003036328A1 (en) * | 2001-10-22 | 2003-05-01 | Ibeo Automobile Sensor Gmbh | Optoelectronic detection device |
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