DE4143703B4 - Visibility improving equipment esp. in motor vehicle - contains optical illumination system operating during successive intervals and receiver system acquiring images of illuminated region during and between illumination intervals for - Google Patents
Visibility improving equipment esp. in motor vehicle - contains optical illumination system operating during successive intervals and receiver system acquiring images of illuminated region during and between illumination intervals for Download PDFInfo
- Publication number
- DE4143703B4 DE4143703B4 DE4143703A DE4143703A DE4143703B4 DE 4143703 B4 DE4143703 B4 DE 4143703B4 DE 4143703 A DE4143703 A DE 4143703A DE 4143703 A DE4143703 A DE 4143703A DE 4143703 B4 DE4143703 B4 DE 4143703B4
- Authority
- DE
- Germany
- Prior art keywords
- intervals
- illumination
- receiver system
- motor vehicle
- illuminated region
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
- B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
- B60Q1/14—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights having dimming means
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
Abstract
Description
Die Erfindung betrifft eine Anordnung zur Verbesserung der Sicht in Fahrzeugen, gemäß dem Oberbegriff des Patentanspruchs 1.The The invention relates to an arrangement for improving the visibility in Vehicles, according to the generic term of claim 1
Bei der nachveröffentlichten Patentanmeldung P 41 07 850 wird mittels einer Beleuchtungsoptik ein Raumwinkelbereich, der vorzugsweise in einer Ebene aufgeweitet und senkrecht dazu eng gebündelt ist, ausgeleuchtet. Eine Empfangsoptik nimmt das von in dem Raumwinkelbereich beleuchteten Objekten zurückgestreute Licht auf und erzeugt ein Bild des Beobachtungsraums. Neben diesem auf Grund der Beleuchtung durch die Beleuchtungsoptik rückgestreuten Licht als Nutzsignal tritt auch noch Störlicht auf, welches die Erkennung des wesentlichen Bildinhalts erschweren kann. Als Störlicht treten bei Anwendung der Anordnung in einem Straßenfahrzeug vor allem das Scheinwerferlicht von fremden Fahrzeugen oder das Laserlicht gleichartiger Anordnungen in fremden Fahrzeugen sowie Reflexionen solcher Störlichtquellen in Erscheinung.at the post-published Patent application P 41 07 850 is by means of a lighting optical system a solid angle range, which preferably widens in a plane and tightly bundled vertically is lit up. A receiving optics takes that of in the solid angle area backscattered illuminated objects Light up and create a picture of the observation room. Beside this backscattered due to illumination by the illumination optics Light as useful signal also occurs stray light, which is the detection of the main picture content. As stray light occur Application of the arrangement in a road vehicle especially the headlight from foreign vehicles or the laser light of similar arrangements in foreign vehicles as well as reflections of such stray light sources in appearance.
Die
europäischen
Offenlegungsschrift
Aus
der europäischen
Offenlegungsschrift
Das
Auch
das
Aus
den in den
Aufgabe der vorliegenden Erfindung ist es daher, eine Anordnung der im Oberbegriff des Patentanspruchs 1 genannten Art anzugeben, bei welcher der Störlichteinfluss reduziert ist.task The present invention is therefore an arrangement of the preamble specify the type mentioned in claim 1, in which the Störlichteinfluss is reduced.
Die Erfindung ist im Patentanspruch 1 beschrieben. Die Unteransprüche enthalten vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung.The Invention is described in claim 1. The subclaims contain advantageous embodiments and modifications of the invention.
Die Erfindung nutzt die Erkenntnis aus, dass die in Frage kommenden Störlichtquellen im Regelfall nur langsam zeitveränderlich sind und durch hinreichend kurz gewählte Intervallfolgezeiten als statisch betrachtet werden können.The Invention exploits the knowledge that the candidate in question interfering light usually only slowly changing over time are and by sufficiently short interval intervals selected as can be considered statically.
Die Erfindung ist nachfolgend unter Bezugnahme auf die Abbildung noch weiter erläutert.The Invention is still with reference to the figure further explained.
Als Lichtquelle der Beleuchtungseinrichtung sei dabei eine Halbleiterlaseranordnung angenommen, die gepulst betrieben werden kann. Die Auswertung der Empfangssignale in der Empfangsoptik erfolgt in Intervallen, wobei die Empfangsoptik vorzugsweise in der Art eines elektronischen Verschlusses eines Lichtverstärkers mit gepulster elektrischer Spannung UE oder als CCD-Detektorarray mit geschalteten Detektorelementen oder Detektorgates.When Light source of the illumination device is a semiconductor laser arrangement suppose that can be operated pulsed. The evaluation of the Receive signals in the receiving optics takes place at intervals, wherein the receiving optics preferably in the manner of an electronic shutter a light amplifier with pulsed electrical voltage UE or as a CCD detector array with switched detector elements or detector gates.
Die Laseranordnung emittiert während Sendeintervallen IS1, IS3, ISy ..., die zu den Zeitpunkten t1, t3, t5, ... beginnen und jeweils eine Intervalldauer von TI umfassen, infrarotes Licht der Leistung Po, das über optische Elemente der Beleuchtungsoptik als Lichtbündel in einen bestimmten Raumwinkelbereich abgestrahlt wird. Das von Gegenständen in dem ausgeleuchteten Raumwinkel zur Empfangsoptik rückgestreute Licht wird dort während der Empfangsintervalle IE1, IE3, IE5, ..., die zeitgleich zu den Sendeintervallen liegen, aufgenommen und er zeugt Momentanbilder B1, B3, B5, ..., welche zusätzlich zu dem Nutzsignal auch noch Störsignale enthalten. In den Zeitabschnitten von t1 + TI bis t3, von t3 + TI bis t5 usw., in denen die Laseranordnung kein Licht emittiert, sind weitere Empfangs-Zwischenintervalle IE2, IE4, ... eingefügt, in denen von der Empfangsoptik weitere Momentanbilder B2, B4, ... aufgenommen werden, die nur Störsignale enthalten. Unter der Voraussetzung quasistatischen Verhaltens der Störlichtquellen sind die Störsignale der Momentanbilder B2, B4, ... aus den Zwischeninterballen IE2, IE4, ... gleich oder bei unterschiedlicher Intervalllänge zumindest proportional an Störsignalanteilen in den zeitlich benachbarten Momentanbildern B1, B3, B5, ... aus den Intervallen IE1, IE3, IE5, ..., so dass in diesen z. B. durch einfache ggf. gewichtete bildpunktweise Subtraktion B1–B2, B3–B4, ..., störsignalbefreite Bilder des ausgeleuchteten Beobachtungsraums gewonnen werden können.The laser array emits infrared light of the power P o during transmission intervals IS1, IS3, ISy ..., which start at the times t1, t3, t5,... And each comprise an interval duration of TI, via optical elements of the illumination optics Light beam is emitted in a certain solid angle range. The light backscattered from objects in the illuminated solid angle to the receiving optics is recorded there during the reception intervals IE1, IE3, IE5,..., Which coincide with the transmission intervals, and generates instant images B1, B3, B5, also contain interference signals to the useful signal. In the time periods from t1 + TI to t3, from t3 + TI to t5, etc., in which the laser arrangement emits no light, further receive intermediate intervals IE2, IE4,... Are inserted, in which additional instant images B2, B4, ... are recorded, which contain only interference signals. On the assumption of quasi-static behavior of the interfering light sources, the interfering signals of the instantaneous images B2, B4,... From the intermediateintervals IE2, IE4,... Are equal or at different proportions at least proportional to interfering signal components in the temporally adjacent instantaneous component B1, B3, B5, ... from the intervals IE1, IE3, IE5, ..., so that in these z. B. by simple optionally weighted pixel-by-pixel subtraction B1-B2, B3-B4, ..., noise-freed images of the illuminated observation room can be obtained.
Die Sendeintervalle IS1, IS3, IS5, ... und die Empfangsintervalle IE1, IE3, IE5, ... sind im Regelfall synchron und die Intervalllänge liegt beispielsweise in der Größenordnung von 10 μs. Die Empfangsintervalle IE1, IE3, IE5, ... und die Empfangs-Zwischenintervalle IE2, IE4, ... sind vorzugsweise, aber nicht notwendigerweise, gleich lang. Bei Verwendung eines CCD-Detektorarrays in der Empfangsoptik sind Dauer TI und Abstand der Intervalle IE1, IE2, ... vorteilhafterweise auf die optimalen Parameter des CCD-Arrays wie Integrationszeit und Bildwiederholzeit abgestimmt. Bei geschwenktem Lichtbündel sind vorteilhafterweise Schwenkschrittfolgezeit bzw. Schwenkgeschwindigkeit und Intervallfolgezeit so aufeinander abgestimmt, dass in jeder Schwenkschrittstellung bzw. während einer für das Überstreichen eines Auflösungswinkelinkrements der Empfangsoptik benötigten Zeit jeweils mindestens ein Laserimpuls emittiert wird, so dass jede Bildzeile ein laserbeleuchtetes Teilbild aufnimmt.The Transmission intervals IS1, IS3, IS5,... And the reception intervals IE1, IE3, IE5, ... are usually synchronous and the interval length is for example, in the order of magnitude of 10 μs. The reception intervals IE1, IE3, IE5, ... and the reception intermediate intervals IE2, IE4, ... are preferably, but not necessarily, the same long. When using a CCD detector array in the receiving optics are duration TI and interval of the intervals IE1, IE2, ... advantageously on the optimal parameters of the CCD array such as integration time and image refresh time. When the light beam is turned Advantageously, slewing step time or swing speed and interval time so matched to each other Pivoting step position or during one for the painting over a resolution angle increment needed the receiving optics Each time at least one laser pulse is emitted, so that each image line receives a laser-illuminated partial image.
Bei der Erfindung werden die Mittelwerte der Bildsignale aus zwei aufeinander folgenden Zwischenintervallen von den Bilddaten aus einem Beleuchtungsintervall subtrahiert.at According to the invention, the mean values of the image signals of two become one upon another following intervals of the image data from a lighting interval subtracted.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19914129751 DE4129751B4 (en) | 1991-03-12 | 1991-09-09 | Arrangement for improving visibility, especially in vehicles |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19914129751 DE4129751B4 (en) | 1991-03-12 | 1991-09-09 | Arrangement for improving visibility, especially in vehicles |
Publications (1)
Publication Number | Publication Date |
---|---|
DE4143703B4 true DE4143703B4 (en) | 2008-06-19 |
Family
ID=39400063
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE4143703A Expired - Lifetime DE4143703B4 (en) | 1991-03-12 | 1991-09-09 | Visibility improving equipment esp. in motor vehicle - contains optical illumination system operating during successive intervals and receiver system acquiring images of illuminated region during and between illumination intervals for |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE4143703B4 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012011847A1 (en) * | 2012-06-14 | 2013-12-19 | GM Global Technology Operations, LLC (n.d. Ges. d. Staates Delaware) | Night vision system for a motor vehicle |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4521861A (en) * | 1982-04-30 | 1985-06-04 | Texas Instruments Incorporated | Method and apparatus for enhancing radiometric imaging |
US4700229A (en) * | 1985-07-09 | 1987-10-13 | U.S. Philips Corporation | Image enhancement circuit |
US4876734A (en) * | 1987-05-25 | 1989-10-24 | Fuji Photo Film Co., Ltd. | Image signal processing method and apparatus |
EP0344404A1 (en) * | 1988-06-03 | 1989-12-06 | Inventio Ag | Method and device for controlling the position of an automatic door |
EP0353200A2 (en) * | 1988-06-27 | 1990-01-31 | FIAT AUTO S.p.A. | Method and device for instrument-assisted vision in poor visibility, particularly for driving in fog |
US4954962A (en) * | 1988-09-06 | 1990-09-04 | Transitions Research Corporation | Visual navigation and obstacle avoidance structured light system |
DE4107850A1 (en) * | 1990-03-10 | 1992-06-17 | Daimler Benz Ag | Night vision aid for automobile |
-
1991
- 1991-09-09 DE DE4143703A patent/DE4143703B4/en not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4521861A (en) * | 1982-04-30 | 1985-06-04 | Texas Instruments Incorporated | Method and apparatus for enhancing radiometric imaging |
US4700229A (en) * | 1985-07-09 | 1987-10-13 | U.S. Philips Corporation | Image enhancement circuit |
US4876734A (en) * | 1987-05-25 | 1989-10-24 | Fuji Photo Film Co., Ltd. | Image signal processing method and apparatus |
EP0344404A1 (en) * | 1988-06-03 | 1989-12-06 | Inventio Ag | Method and device for controlling the position of an automatic door |
EP0353200A2 (en) * | 1988-06-27 | 1990-01-31 | FIAT AUTO S.p.A. | Method and device for instrument-assisted vision in poor visibility, particularly for driving in fog |
US4954962A (en) * | 1988-09-06 | 1990-09-04 | Transitions Research Corporation | Visual navigation and obstacle avoidance structured light system |
DE4107850A1 (en) * | 1990-03-10 | 1992-06-17 | Daimler Benz Ag | Night vision aid for automobile |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012011847A1 (en) * | 2012-06-14 | 2013-12-19 | GM Global Technology Operations, LLC (n.d. Ges. d. Staates Delaware) | Night vision system for a motor vehicle |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1040366B1 (en) | Method and device for recording three-dimensional distance-measuring images | |
DE3123703C2 (en) | ||
EP1053140B1 (en) | Method for detecting objects located on a transparent panel, and corresponding device | |
DE3712513C2 (en) | ||
DE4440613C1 (en) | Device and method for the detection and demodulation of an intensity-modulated radiation field | |
EP2879919B1 (en) | Detection of rain drops on a plate by means of a camera and illumination | |
WO2010076066A1 (en) | Camera arrangement for sensing a state of a vehicle window | |
DE3718151C2 (en) | ||
EP1506108A1 (en) | Rain sensor | |
DE102004047022A1 (en) | Device for monitoring room areas | |
DE10018305C2 (en) | Flow analysis method and apparatus | |
DE102018203584A1 (en) | Operating Procedures for a LiDAR System, LiDAR System Control Unit, LiDAR System and Work Device | |
DE2011470B2 (en) | PROCESS FOR EVALUATING AN IMAGE TAKEN BY A SCREEN PROCESS | |
DE3011014C2 (en) | ||
DE4129912C1 (en) | ||
EP2013642A1 (en) | Device and method for recording distance images | |
DE4143703B4 (en) | Visibility improving equipment esp. in motor vehicle - contains optical illumination system operating during successive intervals and receiver system acquiring images of illuminated region during and between illumination intervals for | |
DE4129751B4 (en) | Arrangement for improving visibility, especially in vehicles | |
DE10248416B4 (en) | Device and method for determining a relative movement of a vehicle | |
EP0046241B1 (en) | Device for the detection of irregular features at the brim of a container | |
DE4228629C2 (en) | Image acquisition and image processing system for night-time video surveillance | |
EP4172650A1 (en) | Lidar sensor, in particular a vertical flash lidar sensor | |
EP3007430A1 (en) | Camera system and a method for inspection and/or measurement of objects | |
DE2635042C3 (en) | Method and device for the detection of cracks on the surface of a workpiece | |
DE102005008850B4 (en) | Device for automatically switching lighting devices of a motor vehicle on and off |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
Q172 | Divided out of (supplement): |
Ref document number: 4129751 Country of ref document: DE Kind code of ref document: P |
|
8101 | Request for examination as to novelty | ||
8110 | Request for examination paragraph 44 | ||
8127 | New person/name/address of the applicant |
Owner name: DAIMLERCHRYSLER AG, 70327 STUTTGART, DE |
|
AC | Divided out of |
Ref document number: 4129751 Country of ref document: DE Kind code of ref document: P |
|
8127 | New person/name/address of the applicant |
Owner name: DAIMLER AG, 70327 STUTTGART, DE |
|
AC | Divided out of |
Ref document number: 4129751 Country of ref document: DE Kind code of ref document: P |
|
8364 | No opposition during term of opposition | ||
8330 | Complete disclaimer |