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DE3922085C1 - Close distance measurer for two motor vehicles - sends light pulses and HF pulses for evaluation for safety precaution - Google Patents

Close distance measurer for two motor vehicles - sends light pulses and HF pulses for evaluation for safety precaution

Info

Publication number
DE3922085C1
DE3922085C1 DE3922085A DE3922085A DE3922085C1 DE 3922085 C1 DE3922085 C1 DE 3922085C1 DE 3922085 A DE3922085 A DE 3922085A DE 3922085 A DE3922085 A DE 3922085A DE 3922085 C1 DE3922085 C1 DE 3922085C1
Authority
DE
Germany
Prior art keywords
pulses
evaluation
light
transmitter
distance
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.)
Expired - Lifetime
Application number
DE3922085A
Other languages
German (de)
Inventor
Hans 8068 Pfaffenhofen De Spies
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.)
Conti Temic Microelectronic GmbH
Original Assignee
Messerschmitt Bolkow Blohm AG
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 Messerschmitt Bolkow Blohm AG filed Critical Messerschmitt Bolkow Blohm AG
Priority to DE3922085A priority Critical patent/DE3922085C1/en
Priority to JP2175459A priority patent/JPH0351787A/en
Application granted granted Critical
Publication of DE3922085C1 publication Critical patent/DE3922085C1/en
Priority to US07/884,413 priority patent/US5247296A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/013—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K28/00—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/24—Arrangements for mounting bumpers on vehicles
    • B60R19/38—Arrangements for mounting bumpers on vehicles adjustably or movably mounted, e.g. horizontally displaceable for securing a space between parked vehicles
    • B60R19/40—Arrangements for mounting bumpers on vehicles adjustably or movably mounted, e.g. horizontally displaceable for securing a space between parked vehicles in the direction of an obstacle before a collision, or extending during driving of the vehicle, i.e. to increase the energy absorption capacity of the bumper
    • 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
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/86—Combinations of radar systems with non-radar systems, e.g. sonar, direction finder
    • G01S13/865—Combination of radar systems with lidar 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/013—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over
    • B60R21/0134—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over responsive to imminent contact with an obstacle, e.g. using radar systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Optical Radar Systems And Details Thereof (AREA)
  • Measurement Of Optical Distance (AREA)

Abstract

The unit described is intended for two objects moving relative to one another in the near distance (up to 100 m), esp motor vehicles. The first object has a light pulse radiator, a receiver and in series with it an evaluating unit for determining the distance of the second object by means of the transit time of a pulse transmitted by the first to the second, reflected back and received by the first. The evaluation unit is controlled by a microprocessor. The light source (3) radiates not only light pulses but also HF pulses which are are received by the same aerial (2) or another one (5) after reflection and which are subjected to amplification or delay before reaching the signal processor (11) with the light pulses. USE/ADVANTAGE - Distance to another vehicle or obstruction. Releasing alarm and/or safety equipment such as protective air cushion, braking, switching off engine, tightening seat belt.

Description

Die Erfindung betrifft eine Einrichtung zur Bestimmung von Abständen zwischen zwei Objekten im Nahbereich gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a device for determining distances between two objects in the close range according to the preamble of claim 1.

Es ist eine solche Einrichtung bereits bekannt aus der Deutschen Patent­ schrift 36 40 449 der Anmelderin. Auch die bekannte Einrichtung soll möglichst unabhängig von atmosphärischen Einflüssen arbeiten können und geeignet sein Nutzsignale von stark verrauschten Empfangssignalen zu ei­ ner genauen Entfernungsbestimmung heranzuziehen.Such a device is already known from the German patent document 36 40 449 of the applicant. The well-known facility should also can work as independently as possible from atmospheric influences and be suitable to egg from very noisy received signals exact distance determination.

Aufgabe vorliegender Erfindung ist es, die gleiche oder noch größere Si­ cherheit bei der Abstandsbestimmung zwischen zwei Objekten, die sich re­ lativ zueinander bewegen insbesondere zwei Kraftfahrzeugen im Nahbereich zu erhöhen ohne die Kosten einer solchen Einrichtung wesentlich zu erhö­ hen oder gar zu verdoppeln.The object of the present invention is to use the same or even larger Si safety when determining the distance between two objects that are right relative to one another, in particular two motor vehicles move in the vicinity to increase without significantly increasing the cost of such a facility hen or even double.

Diese Aufgabe wird gemäß der Erfindung durch die im kennzeichnenden Teil des Patentanspruchs 1 angegebenen Merkmale gelöst, wobei die Auswerte­ schaltung prozessorgesteuert sein kann, wie in der Deutschen Patent­ schrift 36 40 449 beschrieben, jedoch auch eine an sich bekannte Auswer­ telogik oder Plausibilitätslogik Anwendung finden kann.This object is achieved according to the invention by the in the characterizing part of the specified features solved, the evaluations circuit can be processor-controlled, as in the German patent Scripture 36 40 449 described, but also a known Auswer telogic or plausibility logic can be used.

Der wesentliche Vorteil der Erfindung liegt darin, daß obwohl die Si­ cherheit der Abstandsbestimmung oder Entfernungsmessung in dem sensiblen Nahbereich (unter 100 m) entscheidend verbessert wird, sich die Einrich­ tung nicht entsprechend verteuert. Erreicht wird dies vor allem dadurch, daß mit den gleichen Einheiten das Senden und Empfangen sowohl von Lichtimpulsen als auch Hochfrequenzimpulsen erfolgen kann. Über einen gemeinsamen Kanal und Vergleich der gemessenen rückgestreuten Signalver­ läufe wird eine sichere Abstands- bzw. Entfernungsangabe möglich, auch im sensiblen Nahbereich, ohne die Kosten von z.B. zwei Sendern und zwei Empfängern und entsprechenden separaten Verarbeitungskanälen. The main advantage of the invention is that although the Si safety of distance determination or distance measurement in the sensitive Short range (under 100 m) is significantly improved, the facility not expensive accordingly. This is mainly achieved by that with the same units sending and receiving both Light pulses as well as high-frequency pulses can take place. About one common channel and comparison of the measured backscattered signal ver runs, a safe distance or distance specification is possible, too in the sensitive close range, without the costs of e.g. two transmitters and two Receivers and corresponding separate processing channels.  

Auf diese Weise ist es erfindungsgemäß möglich, eine Einrichtung zum Be­ stimmen von Abständen im Nahbereich zu schaffen, bei der wenn z.B. ein vorgegebener Abstand zwischen zwei Objekten, die sich relativ zueinander bewegen, z.B. zwischen zwei Fahrzeugen oder zwischen einem Fahrzeug und einem Hindernis, eine Warnanzeige erfolgt, sobald dieser Abstand unter­ schritten wird, oder/und eine Zündstufe ausgelöst wird, die ein Rückhal­ tesystem auslöst, z.B. ein Gaskissen aufbläst mit Hilfe eines bekannten Gasgenerators oder Rückhaltegurte mit Hilfe eines Gurtstrammers fest­ zieht. Auch andere Maßnahmen für den Kollisionsfall können ausgelöst werden, wie Motor-Abschaltung, Bremsbetätigung, Warnblinker, Warnleuch­ ten, Warntöne oder andere Warnsignale ausstoßen, Puffer und Stoßdämpfer aktualisieren (in Wirkstellung bringen).In this way it is possible according to the invention to provide a device for loading to create distances in the close range, at which if e.g. a given distance between two objects that are relative to each other move, e.g. between two vehicles or between one vehicle and an obstacle, a warning is given as soon as this distance is below is stepped, and / or an ignition stage is triggered, the back system, e.g. inflates a gas cushion using a known one Gas generator or restraint belts with the help of a belt tensioner pulls. Other measures in the event of a collision can also be triggered such as engine shutdown, brake actuation, hazard lights, warning lights emit warning tones or other warning signals, buffers and shock absorbers update (bring into active position).

AusführungsbeispielEmbodiment

Aus dem Pulsgeber (Halbwertsbreite ca. 1-50 ns) für die Laserdiode wird über eine bekannte geeignete Einrichtung (z.B. Strip-linetechnik) eine Hochfrequenzpulsleistung abgeleitet, z.B. aus dem Steuerstrom der Laser­ diode im Bereich von etwa 50 MHz bis etwa 60 GHz (aperiodisch) ausge­ koppelt und über eine Antenne abgestrahlt. Die vom zu detektierenden Gegenstand rückgestreuten Hochfrequenzpulssignale werden über die gleiche Antenne empfangen und direkt oder/und nach Verstärkung und/oder Verzögerung dem gleichen Signalprozessor (Dual-Gate, oder adaptive Sig­ nalverarbeitung) zur Auswertung zugeführt. Damit wird die Laufzeit des Hochfrequenzimpulses verglichen oder ermittelt und eine Abstandsmessung durchgeführt. In einer Auswerte- oder Plausibilitätslogik werden die ge­ wonnenen Abstandsmessungen auf dem optischen und hochfrequenten Kanal verglichen und eine sichere Entfernungsangabe oder Messung für eine festeingestellte Entfernung ermittelt.The pulse generator (half-value width approx. 1-50 ns) for the laser diode becomes via a known suitable device (e.g. strip-line technology) High frequency pulse power derived, e.g. from the control current of the lasers diode in the range from about 50 MHz to about 60 GHz (aperiodic) couples and radiated via an antenna. The one to be detected Object backscattered high frequency pulse signals are over the same antenna received and directly or / and after amplification and / or Delay the same signal processor (dual gate, or adaptive Sig processing) for evaluation. With this, the term of the High-frequency pulse compared or determined and a distance measurement carried out. In an evaluation or plausibility logic, the ge distance measurements on the optical and high-frequency channel compared and a safe distance specification or measurement for a fixed distance determined.

In der einzigen Zeichnung ist als Beispiel eine Einrichtung zum Bestim­ men von Abständen im Nahbereich dargestellt. Dort dient eine Laserdiode als optischer Sender 1 und eine PIN-Diode 2 als optischer Empfänger. Von dem Sender wird eine Hochfrequenzenergie ausgekoppelt, vom Sendepulser 3 über eine Streifenleitung 4, die an eine aperiodische Antenne 5 ange­ schlossen ist. Der Streifenleitung 4 ist ein Richtkoppler 6 zugeordnet zur Unterscheidung der Ein- und Ausgangssignale oder über den Zeitver­ lauf der Signale. Diese Signale werden verstärkt und/oder verzögert in einer Verzögerungsleitung 7 und einer Dual-Gate-Stufe 8 zugeführt. Eine gleiche Dual-Gate-Stufe 9 ist mit der Ablaufsteuerung 10 und diese mit dem Sendepulser 3 verbunden. Die Dual-Gate-Stufen 8 und 9 sind mit der Auswertelogik 11 verbunden und die Dual-Gate Stufe 8 ist ihrerseits an den optischen Empfänger 2 angeschlossen. Die Ausgabe 12 ist der Auswer­ telogik 11 zugeordnet.In the single drawing, a device for determining distances in the close range is shown as an example. There, a laser diode serves as an optical transmitter 1 and a PIN diode 2 as an optical receiver. A radio frequency energy is coupled out from the transmitter, from the transmitter pulser 3 via a strip line 4 , which is connected to an aperiodic antenna 5 . The stripline 4 is assigned a directional coupler 6 to differentiate the input and output signals or the time course of the signals. These signals are amplified and / or delayed in a delay line 7 and a dual gate stage 8 . An identical dual-gate stage 9 is connected to the sequence controller 10 and this is connected to the transmit pulser 3 . The dual-gate stages 8 and 9 are connected to the evaluation logic 11 and the dual-gate stage 8 is in turn connected to the optical receiver 2 . The output 12 is assigned to the evaluation telogic 11 .

Die Signalausgabe erfolgt z.B. an eine Zündstufe 13 als Auslöser für ein Sicherheitssystem wie Rückhaltesystem, wenn im Kfz angewandt. Dort wird dann in bekannter Weise ein Gasgenerator gezündet, welcher ein Gaskissen aufbläst oder einen Gurt strammt.The signal is output, for example, to an ignition stage 13 as a trigger for a safety system such as a restraint system when used in a motor vehicle. There, a gas generator is then ignited in a known manner, which inflates a gas cushion or tightens a belt.

Selbstverständlich können auch andere Maßnahmen ausgelöst werden. Die Anwendung ist nicht auf Kraftfahrzeug (Kfz) beschränkt.Of course, other measures can also be triggered. The Application is not limited to motor vehicles.

Claims (5)

1. Einrichtung zur Bestimmung von Abständen im Nahbereich (kleiner als 100 m) zwischen zwei Objekten, die sich relativ zueinander bewegen, insbesondere zwischen zwei Kraftfahrzeugen, wobei das erste Objekt einen Lichtimpulssender, einen Empfänger und eine diesen nachgeschaltete Aus­ werteschaltung zur Ermittlung der Entfernung aus der Laufzeit eines aus­ gesendeten, am zweiten Objekt reflektierten und anschließend empfangenem Lichtimpuls aufweist, wobei die Auswerteschaltung prozessorgesteuert ist, dadurch gekennzeichnet, daß der Sender (3) nicht nur Lichtimpulse abstrahlt, sondern auch Hochfrequenzimpulse, welche über die gleiche (2) oder eine gesonderte (5) Antenne nach ihrer Rückstreuung empfangen und direkt und/oder nach Verstärkung bzw. Verzögerung dem gleichen Signal­ prozessor (11) wie für das optische Signal vorgesehen zur Auswertung zu­ geführt werden.1. Device for determining distances in the close range (less than 100 m) between two objects that move relative to one another, in particular between two motor vehicles, the first object comprising a light pulse transmitter, a receiver and an evaluation circuit connected downstream to determine the distance the transit time of a light pulse transmitted from, reflected on the second object and then received, the evaluation circuit being processor-controlled, characterized in that the transmitter ( 3 ) not only emits light pulses, but also high-frequency pulses which are transmitted via the same ( 2 ) or a separate one (5) Antenna received after its backscattering and directly and / or after amplification or delay the same signal processor ( 11 ) as intended for the optical signal to be performed for evaluation. 2. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß im Signal- bzw. Auswerteprozessor (11) in einer Auswerte- oder Plausibili­ tätskontrollogik die gewonnenen Meßwerte (Abstände) aus der Lichtimpuls­ messung und aus der Hochfrequenzimpulsmessung verglichen und (bei 12) ausgegeben werden zur Anzeige und/oder Ansteuerung von Aktuatoren (13).2. Device according to claim 1, characterized in that in the signal or evaluation processor ( 11 ) in an evaluation or plausibility control logic, the measured values obtained (distances) from the light pulse measurement and from the radio frequency pulse measurement are compared and (at 12 ) are output for Display and / or control of actuators ( 13 ). 3. Einrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Sender eine Streifenleitung (4) aufweist um die über eine Antenne (5) aperiodisch abgestrahlte Hochfrequenzleistung aus dem Pulsgeber (3) für den Lichtimpulssender (1) auszukoppeln.3. Device according to claim 1 or 2, characterized in that the transmitter has a strip line ( 4 ) in order to couple out the aperiodically emitted high-frequency power from the pulse generator ( 3 ) for the light pulse transmitter ( 1 ) via an antenna ( 5 ). 4. Einrichtung nach einem der vorhergehenden Ansprüche, dadurch ge­ kennzeichnet, daß der Antenne (5) ein Richtkoppler (6) zugeordnet ist zur Unterscheidung auf Eingangs- und Ausgangsimpulse oder über den Zeit­ verlauf der Impulse. 4. Device according to one of the preceding claims, characterized in that the antenna ( 5 ) is assigned a directional coupler ( 6 ) for distinguishing between input and output pulses or over time of the pulses. 5. Einrichtung nach einem der vorhergehenden Ansprüche, dadurch ge­ kennzeichnet, daß die Lichtimpulse und die Hochfrequenzimpulse gemein­ sam über einen einzigen Kanal (7) einem Dual-Gate (8) oder einer adapti­ ven Signalverarbeitungseinheit zugeführt werden und dort zur Auswertung kommen.5. Device according to one of the preceding claims, characterized in that the light pulses and the high-frequency pulses together via a single channel ( 7 ) are fed to a dual gate ( 8 ) or an adaptive signal processing unit and come there for evaluation.
DE3922085A 1989-07-05 1989-07-05 Close distance measurer for two motor vehicles - sends light pulses and HF pulses for evaluation for safety precaution Expired - Lifetime DE3922085C1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE3922085A DE3922085C1 (en) 1989-07-05 1989-07-05 Close distance measurer for two motor vehicles - sends light pulses and HF pulses for evaluation for safety precaution
JP2175459A JPH0351787A (en) 1989-07-05 1990-07-04 Apparatus for measuring space between two objects in close regions
US07/884,413 US5247296A (en) 1989-07-05 1992-05-12 Device for determination of distances between close-range objects

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3922085A DE3922085C1 (en) 1989-07-05 1989-07-05 Close distance measurer for two motor vehicles - sends light pulses and HF pulses for evaluation for safety precaution

Publications (1)

Publication Number Publication Date
DE3922085C1 true DE3922085C1 (en) 1991-01-31

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Application Number Title Priority Date Filing Date
DE3922085A Expired - Lifetime DE3922085C1 (en) 1989-07-05 1989-07-05 Close distance measurer for two motor vehicles - sends light pulses and HF pulses for evaluation for safety precaution

Country Status (2)

Country Link
JP (1) JPH0351787A (en)
DE (1) DE3922085C1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0544468A3 (en) * 1991-11-27 1993-07-21 The State Of Israel, Ministry Of Defense, Rafael-Armament Development Authority A collision avoidance and warning system
DE4424878A1 (en) * 1994-07-14 1996-01-18 Temic Bayern Chem Airbag Gmbh Motor vehicle safety system with front and side air-bags
WO1999051467A1 (en) * 1998-04-03 1999-10-14 Robert Bosch Gmbh Method for determining control data for deploying restraint elements in a vehicle prior to a collision
DE102005056265A1 (en) * 2005-11-14 2007-05-16 Pilz Gmbh & Co Kg Device and method for monitoring a room area, in particular for securing a danger zone of an automated system
DE102006052770A1 (en) * 2006-11-09 2008-05-15 Conti Temic Microelectronic Gmbh Environment detection system for detecting distance and obstacle from vehicle i.e. car, has transmitter i.e. laser diode, transmitting selectively two different wavelengths, where receiver is tunable on respective wavelength
DE10144689B4 (en) * 2001-09-11 2010-04-08 Volkswagen Ag Method and device for detecting objects
DE102014008732A1 (en) * 2014-06-19 2015-12-24 Jenoptik Robot Gmbh Method and device for monitoring a radar value of a radar system and traffic monitoring system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2769404B2 (en) * 1992-04-07 1998-06-25 藤本 渥子 Method for forming carbon-nitrogen compound film

Citations (5)

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Publication number Priority date Publication date Assignee Title
DE1548404A1 (en) * 1965-08-04 1970-04-16 Comp Generale Electricite Combined radar-laser alignment device
US4317117A (en) * 1979-07-20 1982-02-23 Chasek Norman E Cross correlated doppler radar/infra red velocity and presence sensor
EP0205794A1 (en) * 1985-05-23 1986-12-30 Contraves Ag Search system for space/air space surveillance
DE3618021A1 (en) * 1986-05-28 1987-12-03 Krupp Gmbh METHOD FOR LOCATING A UNDERWATER DESTINATION
DE3640449C1 (en) * 1986-11-27 1988-06-30 Messerschmitt Boelkow Blohm Device for determining the distance between two objects, in particular two motor vehicles

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1548404A1 (en) * 1965-08-04 1970-04-16 Comp Generale Electricite Combined radar-laser alignment device
US4317117A (en) * 1979-07-20 1982-02-23 Chasek Norman E Cross correlated doppler radar/infra red velocity and presence sensor
EP0205794A1 (en) * 1985-05-23 1986-12-30 Contraves Ag Search system for space/air space surveillance
DE3618021A1 (en) * 1986-05-28 1987-12-03 Krupp Gmbh METHOD FOR LOCATING A UNDERWATER DESTINATION
DE3640449C1 (en) * 1986-11-27 1988-06-30 Messerschmitt Boelkow Blohm Device for determining the distance between two objects, in particular two motor vehicles

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0544468A3 (en) * 1991-11-27 1993-07-21 The State Of Israel, Ministry Of Defense, Rafael-Armament Development Authority A collision avoidance and warning system
DE4424878A1 (en) * 1994-07-14 1996-01-18 Temic Bayern Chem Airbag Gmbh Motor vehicle safety system with front and side air-bags
WO1999051467A1 (en) * 1998-04-03 1999-10-14 Robert Bosch Gmbh Method for determining control data for deploying restraint elements in a vehicle prior to a collision
DE10144689B4 (en) * 2001-09-11 2010-04-08 Volkswagen Ag Method and device for detecting objects
DE102005056265A1 (en) * 2005-11-14 2007-05-16 Pilz Gmbh & Co Kg Device and method for monitoring a room area, in particular for securing a danger zone of an automated system
US8224032B2 (en) 2005-11-14 2012-07-17 Pilz Gmbh & Co. Kg Apparatus and method for monitoring a spatial area, in particular for safeguarding a hazardous area of an automatically operated installation
DE102006052770A1 (en) * 2006-11-09 2008-05-15 Conti Temic Microelectronic Gmbh Environment detection system for detecting distance and obstacle from vehicle i.e. car, has transmitter i.e. laser diode, transmitting selectively two different wavelengths, where receiver is tunable on respective wavelength
DE102006052770B4 (en) 2006-11-09 2022-08-11 Conti Temic Microelectronic Gmbh environment detection system
DE102014008732A1 (en) * 2014-06-19 2015-12-24 Jenoptik Robot Gmbh Method and device for monitoring a radar value of a radar system and traffic monitoring system
DE102014008732B4 (en) * 2014-06-19 2020-12-31 Jenoptik Robot Gmbh Traffic monitoring system for monitoring a detection area of a traffic area

Also Published As

Publication number Publication date
JPH0351787A (en) 1991-03-06

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