DE3801368C2 - - Google Patents
Info
- Publication number
- DE3801368C2 DE3801368C2 DE19883801368 DE3801368A DE3801368C2 DE 3801368 C2 DE3801368 C2 DE 3801368C2 DE 19883801368 DE19883801368 DE 19883801368 DE 3801368 A DE3801368 A DE 3801368A DE 3801368 C2 DE3801368 C2 DE 3801368C2
- Authority
- DE
- Germany
- Prior art keywords
- visibility
- measuring device
- distance
- measuring system
- distance measuring
- 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
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
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
- G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke
- G01N21/538—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke for determining atmospheric attenuation and visibility
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N2021/1765—Method using an image detector and processing of image signal
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/47—Scattering, i.e. diffuse reflection
- G01N2021/4704—Angular selective
- G01N2021/4709—Backscatter
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Immunology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pathology (AREA)
- Health & Medical Sciences (AREA)
- Computer Networks & Wireless Communication (AREA)
- Electromagnetism (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Measurement Of Optical Distance (AREA)
Description
Es sind Sichtweitenmeßgeräte bekannt, die durch Auswertung der Rückstreuanteile von einer kontinuierlich oder impuls förmig betriebenen Lichtquelle an z. B. Nebentröpfchen oder Schneeflocken in einem bestimmten Volumenbereich die Sicht weite bestimmen.Visibility measuring devices are known, which are evaluated the backscattered portions of a continuous or impulse shaped light source at z. B. secondary droplets or Snowflakes in a certain volume range the view determine wide.
Darüber hinaus gibt es Meßanordnungen, die durch die Ermitt lung der Änderung der Transmission über eine definierte Strecke die Sichtweite errechnen.In addition, there are measuring arrangements by the determiners the change in transmission over a defined Calculate the route's visibility.
Beide Verfahren sind in einschlägigen Patentschriften be schrieben.Both methods are in relevant patents wrote.
Nachteile aller dieser Anordnungen sind, daß die Sichtwei tenangaben allein durch die Rückstreuung und oder Dämpfung festgestellt werden, nicht aber der jeweilige Kontrast berücksichtigt wird.Disadvantages of all of these arrangements are that the view only through backscattering and or damping are determined, but not the respective contrast is taken into account.
Zielsetzung der Erfindung ist es, die tatsächliche Sicht weite zu ermitteln.The aim of the invention is the actual view to determine distance.
Die Sichtweite ist gegeben durch den minimal wahrzunehmenden Kontrast im Schwarzweiß-Bereich und der minimal wahrzuneh menden Farbverschiebung im Farb-Bereich und der Entfernung des kontrasterzeugenden Gegenstandes oder Bildausschnittes. Besonders im Straßenverkehr ändern sich die Kontrast- und damit die Sichtweitenverhältnisse drastisch, z. B. durch Regen, Nebel, Schmutz, Schnee und insbesondere durch die Farbe und Beleuchtung der Fahrzeuge.The visibility is given by the minimally perceptible Contrast in the black and white area and minimal perception color shift in the color area and the distance of the contrast-generating object or image detail. Especially in road traffic, the contrast and so the visibility ratio drastically, z. B. by Rain, fog, dirt, snow and especially through the Color and lighting of the vehicles.
Damit entsteht die Notwendigkeit, die tatsächliche Sicht weite aus dem Kontrast im Fahr- oder Stationärbetrieb zu ermitteln, um definierte Geschwindigkeitsempfehlungen oder sonstige Maßnahmen ableiten zu können.This creates the need for the actual view expand from the contrast in driving or stationary operation determine to defined speed recommendations or derive other measures.
Für das erfindungsgemäße Sichtweitenmeßgerät sollen bei spielhaft die Fig. 1-3 dienen.For the range of vision measuring device according to the invention, FIGS . 1-3 are used for example.
Die Anordnung, vgl. Fig. 1, besteht ausThe arrangement, cf. Fig. 1 consists of
- - einem ein- oder mehrkanaligen Abstandsmeßgerät (101) mit Sendeeinheit (103), Empfangseinheit (102) und Auswertung (104). Mit diesem Gerät kann ein- oder mehrkanalig die Entfernung in einem betrachteten Bild gemessen werden z. B. durch Auswertung der Lichtimpulslaufzeit,- A single-channel or multi-channel distance measuring device ( 101 ) with transmitter unit ( 103 ), receiver unit ( 102 ) and evaluation ( 104 ). With this device, the distance in a viewed image can be measured in one or more channels. B. by evaluating the light pulse transit time,
- - einer Schwarzweiß oder Farb-Video Kamera (106). Diese Kamera liefert die jeweiligen Schwarzweiß- und Farb- Kontraste des betrachteten Bildes, - a black and white or color video camera ( 106 ). This camera delivers the respective black and white and color contrasts of the viewed image,
- - z. B. einer IR-Kamera (107), die zur Ermittlung eines Sichthilfe-Bildes die IR-Kontraste z. B. von Schlußleuch ten im Nebel ermittelt,- e.g. B. an IR camera ( 107 ), the IR contrasts z. B. determined by Schlussleuch ten in the fog,
- - einem Verknüpfungs- und Auswerterechner (106),- a linking and evaluation computer ( 106 ),
- - einem Monitor (109) zur Ausgabe der Sichtweite oder Sichtweiten,- a monitor ( 109 ) for outputting the visual range or visual ranges,
- - z. B. einem Monitor (110), der zur Verbesserung der Sicht oder als Sichthilfe z. B. durch Einspiegelung eines künstlichen Bildes in die Windschutzscheibe wirkt,- e.g. B. a monitor ( 110 ) to improve the view or as a visual aid z. B. by reflecting an artificial image into the windshield,
- - z. B. einen Terminal (111), mit den die verschiedenen Funktionen angewählt werden können.- e.g. B. a terminal ( 111 ) with which the various functions can be selected.
Die Kameras (106 und 107) und das Abstandmeßgerät (101) haben entweder getrennte oder gemeinsame Optiken (105). Die Ermittlung der jeweiligen Sichtweiten erfolgt durch Korrela tion der Kontraste einer oder mehrerer Kameras mit den gemessenen Entfernungsdaten im Verknüpfungs- und Auswerte- Rechner (108).The cameras ( 106 and 107 ) and the distance measuring device ( 101 ) have either separate or common optics ( 105 ). The respective sight distances are determined by correlating the contrasts of one or more cameras with the measured distance data in the linkage and evaluation computer ( 108 ).
Zur Beschreibung der Auswertung wird als Beispiel Fig. 2 verwendet.To describe the evaluation of Fig. 2 is used as an example.
In einem Straßenbild (201) befindet sich die Fahrbahn (207) mit den Randbegrenzungen (205) und ein vorausfahrendes Fahrzeug (206), die Entfernungsmeßkanäle sind mit (202) (a, b, c, d) bezeichnet. Es ist nur eine Farb-Kamera-Zeile (204) und eine IR-Kamera-Zeile (203) herausgegriffen. Die Darstellung der Zeilen erfolgt als Helligkeitsoszillogramm, wobei vertikal der Helligkeitswert und horizontal die Lage im Bild dargestellt sind.The roadway ( 207 ) with the edge boundaries ( 205 ) and a vehicle in front ( 206 ) are located in a street picture ( 201 ), the distance measuring channels are designated ( 202 ) (a, b, c, d) . Only one color camera line ( 204 ) and one IR camera line ( 203 ) are selected. The lines are displayed as a brightness oscillogram, with the brightness value shown vertically and the position horizontally in the picture.
Die Auswertung erfolgt gemäß Fig. 3.The evaluation is carried out according to FIG. 3.
Die Entfernungskanäle (301) zeigen bei der Randbegrenzung 50 m (a) und bei dem vorausfahrenden Fahrzeug jeweils 30 m (b, c, d).The distance channels ( 301 ) show 50 m (a) for the boundary and 30 m (b, c, d) for the vehicle in front.
Der Schwarzweiß-Kontrast (305) ist bei der Stelle (a) sehr klein, so daß hieraus die Sichtweite an dieser Stelle mit 50 m ermittelt wird. An der Stelle (b) am Fahrzeugübergang zur Fahrbahn ist der Kontrast sehr hoch, um wieder bei der Stelle (d), Übergang Fahrzug Feld (208), sehr niedrig zu werden, so daß hier eine Sichtweitengrenze von 30 m angenom men wird.The black-and-white contrast ( 305 ) at point (a) is very small, so that the visibility at this point is determined to be 50 m. At point (b) at the vehicle transition to the carriageway, the contrast is very high in order to become very low again at point (d) , transition from field train ( 208 ), so that a limit of visibility of 30 m is assumed here.
In gleicher Weise wird der Farb-Kontrast (306) und der IR- Kontrast (304) ausgewertet.The color contrast ( 306 ) and the IR contrast ( 304 ) are evaluated in the same way.
Die Sichtweite kann dann flächenweise, d. h. als Bild, auf einen Monitor z. B. durch Ausgabe der Kontrastränder und Einfärben mit einer Kennfarbe dargestellt werden.The visibility can then be area-wise, i.e. H. as a picture, on a monitor e.g. B. by outputting the contrast edges and Coloring can be represented with an identification color.
Dabei besteht die Möglichkeit, die Kontrastränder oder Änderung als Fahrhilfe zu verwenden und oder eine getrennte Darstellung der Sichtweite auf einem weiteren Monitor durchzuführen.There is the possibility of the contrasting edges or Change to use as a driving aid and or a separate representation of the visibility on another Monitor.
Aus der Sichtweite kann natürlich eine Empfehlung für die Fahrgeschwindigkeit oder für die Nachführung von Abstands meßsystemen und oder der Beleuchtung verwendet werden.Of course, out of sight can be a recommendation for the Driving speed or for tracking distance measuring systems and or the lighting can be used.
Claims (8)
- -Sichtweite
- -empfohlene Geschwindigkeit
- -Sichthilfe
- -Sichtweitenbild
- -Nachführung des Abstandsmeßsystems
- -Visibility
- -recommended speed
- -Visual aid
- -Visibility image
- -Tracking the distance measuring system
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19883801368 DE3801368A1 (en) | 1988-01-19 | 1988-01-19 | Visual range meter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19883801368 DE3801368A1 (en) | 1988-01-19 | 1988-01-19 | Visual range meter |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3801368A1 DE3801368A1 (en) | 1989-07-27 |
DE3801368C2 true DE3801368C2 (en) | 1989-10-19 |
Family
ID=6345526
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19883801368 Granted DE3801368A1 (en) | 1988-01-19 | 1988-01-19 | Visual range meter |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3801368A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4128039A1 (en) * | 1991-08-23 | 1993-02-25 | Ant Nachrichtentech | Precipitation detection equipment for traffic control - includes camera forming image of reference surface at distance and pattern recognition evaluation unit |
DE19742093A1 (en) * | 1997-09-24 | 1999-03-25 | Kostal Leopold Gmbh & Co Kg | Photoelectric sensor array |
DE19928915A1 (en) * | 1999-06-24 | 2001-01-11 | Bosch Gmbh Robert | Procedure for determining visibility |
DE10034461A1 (en) * | 2000-07-15 | 2002-01-31 | Bosch Gmbh Robert | Procedure for determining visibility |
DE10303047A1 (en) * | 2003-01-24 | 2004-08-05 | Daimlerchrysler Ag | Method and device for improving the visibility and for determining the weather situation |
DE102008030611A1 (en) * | 2008-06-27 | 2010-07-01 | Ingenieurbüro Spies GbR (vertretungsberechtigte Gesellschafter: Hans Spies, Martin Spies, 86558 Hohenwart) | Optical sensor for use in windscreen of car, is designed such that transmitting power to received power ratio is intermittently calibrated, permeability of optical passage window is measured and evaluation of visual range is considered |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4414657C2 (en) * | 1994-04-27 | 1996-08-08 | Volkswagen Ag | Method for determining a critical driving speed of a motor vehicle |
DE59509929D1 (en) * | 1994-07-06 | 2002-01-24 | Volkswagen Ag | Method for determining the visibility, in particular for the movement of a motor vehicle |
US7016045B2 (en) | 1999-03-12 | 2006-03-21 | Regents Of The University Of Minnesota | Video camera-based visibility measurement system |
US6853453B2 (en) | 1999-03-12 | 2005-02-08 | Regents Of The University Of Minnesota | Video camera-based visibility measurement system |
-
1988
- 1988-01-19 DE DE19883801368 patent/DE3801368A1/en active Granted
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4128039A1 (en) * | 1991-08-23 | 1993-02-25 | Ant Nachrichtentech | Precipitation detection equipment for traffic control - includes camera forming image of reference surface at distance and pattern recognition evaluation unit |
DE19742093A1 (en) * | 1997-09-24 | 1999-03-25 | Kostal Leopold Gmbh & Co Kg | Photoelectric sensor array |
DE19928915A1 (en) * | 1999-06-24 | 2001-01-11 | Bosch Gmbh Robert | Procedure for determining visibility |
DE10034461A1 (en) * | 2000-07-15 | 2002-01-31 | Bosch Gmbh Robert | Procedure for determining visibility |
DE10303047A1 (en) * | 2003-01-24 | 2004-08-05 | Daimlerchrysler Ag | Method and device for improving the visibility and for determining the weather situation |
DE102008030611A1 (en) * | 2008-06-27 | 2010-07-01 | Ingenieurbüro Spies GbR (vertretungsberechtigte Gesellschafter: Hans Spies, Martin Spies, 86558 Hohenwart) | Optical sensor for use in windscreen of car, is designed such that transmitting power to received power ratio is intermittently calibrated, permeability of optical passage window is measured and evaluation of visual range is considered |
DE102008030611B4 (en) * | 2008-06-27 | 2011-06-22 | Ingenieurbüro Spies GbR (vertretungsberechtigte Gesellschafter: Hans Spies, Martin Spies, 86558 Hohenwart), 86558 | Optical sensor for visibility measurement according to the transit time method |
Also Published As
Publication number | Publication date |
---|---|
DE3801368A1 (en) | 1989-07-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE102013110332B4 (en) | VISUAL GUIDANCE SYSTEM | |
DE3619824C2 (en) | Device for displaying the current speed or the maximum speed for road vehicles that is safe according to the ambient conditions | |
EP1519152B1 (en) | Device and method for displaying driving instructions | |
DE102006027679B4 (en) | Driving assistance system for vehicles | |
EP1005421B1 (en) | Method for displaying information in a motor vehicle | |
DE4016973C1 (en) | ||
DE19609488A1 (en) | Road situation identification system including map data output facilities | |
EP1303768B1 (en) | Method for determining visibility | |
DE19940723A1 (en) | Method for displaying a perspective image and display device for at least one occupant of a vehicle | |
DE10138719A1 (en) | Method and device for displaying driving instructions, especially in car navigation systems | |
DE102005018697A1 (en) | Method and device for warning a driver in the event of leaving the traffic lane | |
DE3801368C2 (en) | ||
WO2007036397A1 (en) | Night vision device for a motor vehicle | |
WO2013113500A1 (en) | Driver assistance system and method for virtual representation of a road layout under obscured visibility and/or poor visibility conditions | |
DE102007016868A1 (en) | Method for displaying a lane course and control device | |
DE102008041679A1 (en) | Method for environment recognition for navigation system in car, involves storing data of object or feature in storage, and classifying object or feature by comparison of data after visual inspection of object or feature | |
EP3318441B1 (en) | Device for supporting a driver of a vehicle with a projection device | |
DE102015207026A1 (en) | Method and device for controlling a detection system for detecting an environment of a vehicle | |
DE19826283A1 (en) | Object display in motor vehicle | |
DE102011105074A1 (en) | Method for determining visual range for vehicle, involves determining surrounding of vehicle by camera, where contrast dimensions are determined for object depicted in images, where visual range is determined from contrast dimensions | |
DE102017216775A1 (en) | A method, apparatus and computer readable storage medium having instructions for controlling a display of an augmented reality head-up display device for a motor vehicle | |
DE102013021587A1 (en) | Device for generating lane boundary for vehicle, has lane recognition device for detecting first lane boundary, and second lane boundary projected on track surface in response to first detected lane boundary | |
DE102009028644A1 (en) | Method for navigating vehicle, involves determining road levels and road width for live representation of road and comparing determining data with vehicle data | |
DE19615249A1 (en) | Speed indicator for motor vehicle, with actual value transmitter for determining actual speed value | |
DE4140406A1 (en) | Aircraft guidance and navigation system - has read link with control tower so position of aircraft in vicinity of airport are displayed |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
D2 | Grant after examination | ||
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |