WO2022017689A1 - Verfahren zur detektion von verunreinigungen einer optischen sensoranordnung - Google Patents
Verfahren zur detektion von verunreinigungen einer optischen sensoranordnung Download PDFInfo
- Publication number
- WO2022017689A1 WO2022017689A1 PCT/EP2021/066095 EP2021066095W WO2022017689A1 WO 2022017689 A1 WO2022017689 A1 WO 2022017689A1 EP 2021066095 W EP2021066095 W EP 2021066095W WO 2022017689 A1 WO2022017689 A1 WO 2022017689A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- determined
- crosstalk
- sensor arrangement
- dimensions
- detected
- 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.)
- Ceased
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
- 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
-
- 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
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/42—Simultaneous measurement of distance and other co-ordinates
-
- 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
- G01S17/89—Lidar systems specially adapted for specific applications for mapping or imaging
-
- 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
- G01S7/4802—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
-
- 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
- G01S2007/4975—Means for monitoring or calibrating of sensor obstruction by, e.g. dirt- or ice-coating, e.g. by reflection measurement on front-screen
Definitions
- the invention relates to a method for detecting contamination in the signal path of an optical sensor arrangement.
- DE 102005003970 A1 discloses a method for determining contamination on a sensor arrangement on a motor vehicle comprising a lidar sensor, with an area detected by the sensor arrangement being divided into various sub-areas and with sensor signals from a specific surrounding area assigned to a sub-area for determining the functionality of the Sensor arrangement are evaluated.
- sensor signals are evaluated, which are recorded one after the other for different sub-areas when driving past the specific surrounding area.
- the sub-areas are realized by considering a plurality of individual sensors whose detection areas each represent a sub-area.
- the invention is based on the object of specifying a method for detecting contamination in the signal path of an optical sensor arrangement which is improved compared to the prior art.
- light signals reflected on the objects are used according to the invention to detect objects by means of a plurality of photodetector elements of the sensor arrangement recorded.
- a respective object is classified according to its type and the object is assigned to an object class with a predetermined reflectivity during the classification.
- a distance to the object is determined, crosstalk of the detected light signals onto a plurality of photodetector elements is detected and a degree of contamination is determined as a function of the predetermined reflectivity determined during the classification, the distance and a strength of the crosstalk.
- Impurities or contamination of the optical path of sensor arrangements reduce their detection performance and thus the availability and safety of a system using data recorded by the sensor arrangement, in particular a driver assistance system or a system for the automated, in particular fully automated or autonomous, operation of a vehicle and/or robot.
- contamination is within the sensor arrangement, then there is a latent defect which cannot be eliminated easily.
- contamination on a cover of the sensor assembly can be removed by suitable cleaning systems. The detection of the contamination is therefore essential for controlling such a cleaning system and for monitoring safety-related intrinsic limitations.
- the degree of contamination is determined using at least one look-up table. This can be carried out particularly easily and reliably.
- the at least one look-up table is generated using at least one reference measurement carried out using the sensor arrangement.
- the crosstalk is determined by examining an image captured by the sensor arrangement for structures that are typical of crosstalk. This enables a simple and reliable determination of the crosstalk.
- linear structures are used as structures and crosstalk is determined when the linear structures are blurred.
- Such a configuration is suitable in particular for sensor arrangements designed as so-called line scanners, in particular lidars, and enables the crosstalk to be determined in a simple and very reliable manner.
- an increasing degree of crosstalk is determined in particular with an increasing degree of blurring.
- the crosstalk is determined by comparing the dimensions of the detected object with the expected dimensions of such an object and determining an increasing degree of crosstalk as the positive deviation of the dimensions of the detected object from the expected dimensions increases.
- the crosstalk can also be determined easily and reliably by means of this refinement.
- the expected dimensions are determined from dimensions which are determined for an object class corresponding to the object using at least one reference measurement carried out using the sensor arrangement.
- the expected dimensions are derived from an object class corresponding to the object, with objects belonging to the object class having standardized dimensions.
- objects belonging to the object class having standardized dimensions.
- such objects are traffic signs. Due to the standardized dimensions of such objects, a comparison of these with the dimensions of the detected object results in very accurate and reliable results.
- FIG. 1 shows a schematic perspective view of a first exemplary embodiment of a lidar and its detection area during emission of laser radiation
- Fig. 2 shows schematically a perspective view of the lidar and its
- Fig. 3 schematically shows a scene with several objects
- FIG. 4 schematically shows an image of the scene according to FIG. 3 captured by means of a lidar.
- FIG. 1 shows a perspective view of a first exemplary embodiment of an optical sensor arrangement 1 embodied as a ⁇ dar and a detection area E of the same during the emission of light signals L1 embodied as laser radiation.
- FIG. 2 shows a perspective view of the sensor arrangement 1 and the detection area E according to FIG. 1 during reception of reflected light signals L2 in the form of laser radiation.
- the sensor arrangement 1 is, for example, a component of a vehicle and/or robot (not shown), with data of a vehicle and/or robot environment recorded by means of the sensor arrangement 1 being used to carry out automated, in particular fully automated or autonomous, operation of the vehicle and/or robot.
- the sensor arrangement 1 designed as a lidar emits the light signals L1, in particular laser pulses, which are reflected by objects 01 to On shown in more detail in FIG. 3 in the detection area E and are detected by the lidar as reflected light signals L2.
- the sensor arrangement 1 comprises a plurality of receiving elements, which are imaged onto different solid angles of the detection area E, in a manner that is not shown in detail.
- the receiving elements are photodetector elements.
- the sensor arrangement 1 designed as a lidar is a so-called line scanner, which simultaneously illuminates a line Y of its entire field of view or detection range E and images different solid angles on a so-called imager or diode field. In this way, the entire vertical detection area E is illuminated simultaneously and vertical resolution is achieved by a large number of individual receivers, in particular photodetector elements.
- This line Y is then deflected horizontally over the detection area E, for example by means of a rotation of a transmitter and a receiver of the sensor arrangement 1.
- the transmitted and received light signals L1, L2 are at least partially scattered at the contamination and are thus detected at a large number of individual receivers of the sensor arrangement 1.
- Such a scattering of the reflected and detected light signals L2 onto a plurality of photodetector elements is referred to as crosstalk.
- the object 01 to On is classified according to its type and the object 01 to On during the classification of a Object class is assigned with a predetermined reflectivity. Furthermore, a distance to the object 01 to On is determined and crosstalk of the detected light signals L2 onto a plurality of photodetector elements is recorded, with a degree of contamination being determined depending on the specified reflectivity determined during the classification, the distance and a strength of the crosstalk.
- FIG. 3 shows a scene with a number of objects 01 to On, one object 01 being a traffic sign and the other objects 02 to On being highly reflective road markings.
- image B shown in FIG. 4 results.
- the objects 01 to On are detected by the sensor arrangement 1 larger than they are in reality. This results from the crosstalk, with a degree of crosstalk ranging from a reflectivity of the corresponding object 01 to On, a distance of the sensor array 1 to the corresponding Object 01 to On and a resulting from the contamination of the signal path of the sensor array 1 optical scattering is dependent.
- the distance of the objects 01 to On from the sensor arrangement 1 is known in this case, since this is determined directly by means of the lidar by running time measurement.
- the reflectivity of the individual objects 01 to On can be determined, for example, based on the classification of the objects 01 to On according to their type, eg as a traffic sign, and can also be refined using data from a digital road map.
- the determined reflectivities are stored in the digital map, for example by so-called mapping vehicles and/or fleet data, and are thus kept up-to-date and highly accurate.
- the contamination in the signal path can thus be derived directly from the degree of crosstalk.
- the degree of contamination is determined using at least one look-up table, which is generated using at least one reference measurement carried out using sensor arrangement 1 or using other similar sensor arrangements 1, for example sensor arrangements 1 of other vehicles and/or robots.
- the crosstalk is thus determined by examining the image B captured by the sensor arrangement 1 for structures that are typical of crosstalk.
- structures that are typical of crosstalk.
- linear structures are used as structures and crosstalk is determined when the linear structures are blurred.
- an increasing degree of crosstalk can be determined with an increasing degree of blurring.
- the crosstalk can alternatively or additionally be determined by comparing the dimensions of the detected objects 01 to On with the expected dimensions of such an object 01 to On, with an increasing degree as the positive deviation of the dimensions of the detected object 01 to On from the expected dimensions increases of crosstalk is determined.
- the expected Dimensions are determined from dimensions which were determined for an object class corresponding to the object 01 to On in the classification using at least one reference measurement carried out by means of the sensor arrangement 1 .
- the expected dimensions are derived from an object class corresponding to object 01 to On, with objects 01 to On belonging to the object class, such as traffic signs, having standardized dimensions.
- the method described above for determining the contamination in the signal path of the sensor arrangement 1 can also be transferred to those sensor arrangements 1 which comprise at least one camera as a sensor.
- light from other road users and an infrastructure and from the vehicle's own or robot's own light sources is used to illuminate the objects 01 to On, and light signals L2 reflected from the objects 01 to On are captured by the camera.
- Effects that occur here are comparable, for example, to what are known as lightsabers, which are generated by headlights of other vehicles when streaks of water from windshield wipers remain on a windshield of a vehicle.
- Such an effect can be specifically provoked by the vehicle light, for example on traffic signs, for example by carrying out an increased illumination of traffic signs using pixel light.
- an exposure duration of the camera can be adjusted accordingly, in particular increased.
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
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US18/006,157 US20230288545A1 (en) | 2020-07-21 | 2021-06-15 | Method for detecting dirt accumulated on an optical sensor arrangement |
| CN202180061523.5A CN116057416A (zh) | 2020-07-21 | 2021-06-15 | 用于探测光学传感器组件的污染的方法 |
| JP2023504045A JP7518279B2 (ja) | 2020-07-21 | 2021-06-15 | 光センサアレイの汚れを検出する方法 |
| KR1020237005757A KR20230038577A (ko) | 2020-07-21 | 2021-06-15 | 광학 센서 어레이 상의 먼지를 검출하기 위한 방법 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020119116.2 | 2020-07-21 | ||
| DE102020119116.2A DE102020119116B3 (de) | 2020-07-21 | 2020-07-21 | Verfahren zur Detektion von Verunreinigungen einer optischen Sensoranordnung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2022017689A1 true WO2022017689A1 (de) | 2022-01-27 |
Family
ID=76553767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2021/066095 Ceased WO2022017689A1 (de) | 2020-07-21 | 2021-06-15 | Verfahren zur detektion von verunreinigungen einer optischen sensoranordnung |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20230288545A1 (de) |
| JP (1) | JP7518279B2 (de) |
| KR (1) | KR20230038577A (de) |
| CN (1) | CN116057416A (de) |
| DE (1) | DE102020119116B3 (de) |
| WO (1) | WO2022017689A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12072451B2 (en) * | 2021-11-17 | 2024-08-27 | Waymo Llc | Methods for detecting LIDAR aperture fouling |
| KR20240143377A (ko) | 2023-03-24 | 2024-10-02 | 주식회사 엘지에너지솔루션 | 전극시트의 레이저 노칭 장치 및 이를 이용한 전극시트 노칭 방법 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005003970A1 (de) | 2005-01-27 | 2006-08-03 | Daimlerchrysler Ag | Verfahren zur Bestimmung der Funktionsfähigkeit einer Sensoranordnung und Sensoranordnung |
| EP2017645A1 (de) * | 2007-07-16 | 2009-01-21 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Zustandserkennung eines an einem Kraftfahrzeug angeordneten Abstandssensors |
| DE102009016563A1 (de) * | 2009-04-06 | 2009-11-19 | Daimler Ag | Verfahren und Vorrichtung zur Hinderniserkennung in einem Bodenbereich |
| EP3092948A1 (de) * | 2015-05-07 | 2016-11-16 | a.tron3d GmbH | Methode zum erkennen von verschmutzungen |
| WO2019064062A1 (en) * | 2017-09-26 | 2019-04-04 | Innoviz Technologies Ltd. | SYSTEMS AND METHODS FOR DETECTION AND LOCATION BY LIGHT |
| DE102019005060A1 (de) * | 2018-07-26 | 2020-01-30 | Fanuc Corporation | Abstandsmessvorrichtung, die eine Optisches-System-Abnormalität erkennt |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1114754A (ja) * | 1997-06-18 | 1999-01-22 | Omron Corp | 物体検出装置 |
| JP3444192B2 (ja) * | 1998-05-21 | 2003-09-08 | 日産自動車株式会社 | 撮像環境推定装置 |
| DE10344617A1 (de) * | 2003-09-25 | 2005-05-04 | Bosch Gmbh Robert | Verfahren zur Ermittlung von Messeigenschaften einer Radar-Sensoreinrichtung eines Kraftfahrzeuges |
| JP5022609B2 (ja) * | 2006-02-27 | 2012-09-12 | 日立オートモティブシステムズ株式会社 | 撮像環境認識装置 |
| JP2009192499A (ja) | 2008-02-18 | 2009-08-27 | Stanley Electric Co Ltd | 距離画像生成装置 |
| DE102009028578A1 (de) * | 2009-08-17 | 2011-02-24 | Robert Bosch Gmbh | Verfahren für die Umfelderfassung mit einer Lidarsensorik |
| DE102012025467A1 (de) * | 2012-12-28 | 2014-07-03 | Valeo Schalter Und Sensoren Gmbh | Optoelektronische Sensoreinrichtung zur Bestimmung eines Reflexionsvermögens unter Berücksichtigung von Intensitätsverlusten, Kraftfahrzeug und entsprechendes Verfahren |
| EP3460509B1 (de) * | 2017-09-22 | 2024-12-11 | ams AG | Verfahren zur kalibrierung eines flugzeitsystems sowie flugzeitsystem |
| US10867201B2 (en) | 2019-01-15 | 2020-12-15 | Waymo Llc | Detecting sensor occlusion with compressed image data |
| DE102020103794B4 (de) | 2020-02-13 | 2021-10-21 | Daimler Ag | Verfahren zur Kalibrierung eines Lidarsensors |
| DE102020201837A1 (de) | 2020-02-14 | 2021-08-19 | Robert Bosch Gesellschaft mit beschränkter Haftung | LiDAR-Anordnung, LiDAR-System, Fahrzeug und Verfahren |
-
2020
- 2020-07-21 DE DE102020119116.2A patent/DE102020119116B3/de active Active
-
2021
- 2021-06-15 WO PCT/EP2021/066095 patent/WO2022017689A1/de not_active Ceased
- 2021-06-15 JP JP2023504045A patent/JP7518279B2/ja active Active
- 2021-06-15 KR KR1020237005757A patent/KR20230038577A/ko active Pending
- 2021-06-15 CN CN202180061523.5A patent/CN116057416A/zh active Pending
- 2021-06-15 US US18/006,157 patent/US20230288545A1/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005003970A1 (de) | 2005-01-27 | 2006-08-03 | Daimlerchrysler Ag | Verfahren zur Bestimmung der Funktionsfähigkeit einer Sensoranordnung und Sensoranordnung |
| EP2017645A1 (de) * | 2007-07-16 | 2009-01-21 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Zustandserkennung eines an einem Kraftfahrzeug angeordneten Abstandssensors |
| DE102009016563A1 (de) * | 2009-04-06 | 2009-11-19 | Daimler Ag | Verfahren und Vorrichtung zur Hinderniserkennung in einem Bodenbereich |
| EP3092948A1 (de) * | 2015-05-07 | 2016-11-16 | a.tron3d GmbH | Methode zum erkennen von verschmutzungen |
| WO2019064062A1 (en) * | 2017-09-26 | 2019-04-04 | Innoviz Technologies Ltd. | SYSTEMS AND METHODS FOR DETECTION AND LOCATION BY LIGHT |
| DE102019005060A1 (de) * | 2018-07-26 | 2020-01-30 | Fanuc Corporation | Abstandsmessvorrichtung, die eine Optisches-System-Abnormalität erkennt |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2023534817A (ja) | 2023-08-14 |
| US20230288545A1 (en) | 2023-09-14 |
| CN116057416A (zh) | 2023-05-02 |
| KR20230038577A (ko) | 2023-03-20 |
| JP7518279B2 (ja) | 2024-07-17 |
| DE102020119116B3 (de) | 2021-12-16 |
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