EP3612859A1 - Fahrsituationsabhängige abstandsbestimmung für eine kraftfahrzeug-lidar-sensorvorrichtung - Google Patents
Fahrsituationsabhängige abstandsbestimmung für eine kraftfahrzeug-lidar-sensorvorrichtungInfo
- Publication number
- EP3612859A1 EP3612859A1 EP18718431.2A EP18718431A EP3612859A1 EP 3612859 A1 EP3612859 A1 EP 3612859A1 EP 18718431 A EP18718431 A EP 18718431A EP 3612859 A1 EP3612859 A1 EP 3612859A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- distance
- lidar sensor
- computing device
- measurement
- motor vehicle
- 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- Withdrawn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
- 230000001419 dependent effect Effects 0.000 title description 7
- 238000005259 measurement Methods 0.000 claims abstract description 92
- 238000000034 method Methods 0.000 claims description 21
- 238000001514 detection method Methods 0.000 claims description 14
- 230000002123 temporal effect Effects 0.000 claims description 3
- 230000004913 activation Effects 0.000 claims description 2
- 238000011156 evaluation Methods 0.000 description 3
- 238000000691 measurement method Methods 0.000 description 2
- 230000010363 phase shift Effects 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000003287 optical 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
- 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
- G01S17/08—Systems determining position data of a target for measuring distance only
- G01S17/10—Systems determining position data of a target for measuring distance only using transmission of interrupted, pulse-modulated waves
-
- 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
- G01S17/08—Systems determining position data of a target for measuring distance only
- G01S17/32—Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
-
- 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
- G01S17/08—Systems determining position data of a target for measuring distance only
- G01S17/32—Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
- G01S17/36—Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated with phase comparison between the received signal and the contemporaneously transmitted signal
-
- 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
- G01S7/481—Constructional features, e.g. arrangements of optical elements
- G01S7/4817—Constructional features, e.g. arrangements of optical elements relating to scanning
-
- 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
- G01S7/4865—Time delay measurement, e.g. time-of-flight measurement, time of arrival measurement or determining the exact position of a peak
-
- 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
- G01S7/491—Details of non-pulse systems
- G01S7/4912—Receivers
- G01S7/4915—Time delay measurement, e.g. operational details for pixel components; Phase measurement
Definitions
- the invention relates to a computing device for a lidar sensor device for a motor vehicle.
- the computing device has a measurement data interface for receiving measurement data from the lidar sensor device.
- the computing device is formed, a distance of the object from the lidar sensor device by means of a transit time measurement for the detected reflected light component or by means of a
- the invention also relates to a method for operating a lidar sensor device of a motor vehicle with a scanning of the surroundings of the motor vehicle with the scanning light by the scanning device, detecting the light component of the scanning light reflected in the surroundings of the object by the detection device and with determining a distance of the object from the lidar sensor device by means of the transit time measurement for the detected reflected
- Lidar sensor devices or lidar systems ie light detection and ranging systems, are often used in modern motor vehicles for optical distance and / or speed measurements.
- a distance to the object in the vicinity of the lidar sensor device is calculated from the light transit time of signals which are emitted by the lidar sensor device and reflected by the object back to the lidar sensor device.
- the signals may, for example, be in the form of scanning light, from which a light component is reflected back to the lidar sensor device.
- a (temporal) light pulse is thus emitted.
- the duration of this light pulse, the scanning light is the time taken for the scanning light to be reflected back to the source.
- the advantage of this method is the low reaction time and the large measuring range, as distances of one meter to several tens of kilometers can be determined.
- the disadvantage here is the required measurement of very short times, namely from nano- to picoseconds, so that it is difficult to determine the distance with a higher resolution than a few centimeters.
- the scanning light so for example a laser beam, itself frequency-modulated or modulated with a high-frequency signal.
- a distance can also be determined by means of a phase difference measurement between the scanning light and a detected reflected light component.
- the phase shift of the reflected light component of the scanning light or its modulation with respect to the emitted scanning light, for example with respect to the emitted laser beam is distance-dependent. If, for example, a laser is used as the scanning light and the laser beam itself is used for superposition, then the corresponding device operates as it is known from a laser interferometer. These measure no absolute path lengths, but only a relative change in a displacement of the target or a reference mirror.
- the sum of emitted and reflected scanning light is periodically modulated as a result of interference. If the object is displaced by half the wavelength of the light, the overlay will go through exactly one period. If one now counts the passages and multiplies them by the wavelength of the scanning light, one obtains the searched distance. With such an evaluation, accuracies of about one hundredth of the wavelength can be achieved so that with visible light an accuracy of a few nanometers can be achieved.
- a lidar system is described with which a distance between an object with a propagation time measurement and with a phase difference measurement between transmitted and received signal can be determined.
- the invention relates to a computing device for a lidar sensor device for a motor vehicle.
- the lidar sensor device for which the computing device is intended, can in this case be a scanning device for scanning an environment of the motor vehicle with a scanning light, for example a laser scanning light in the form of a scanning light
- the computing device has a measurement data interface for receiving measurement data from the lidar sensor device.
- the measured data can be used for the
- the computing device is formed, a distance of the object in the environment of the motor vehicle
- the lidar sensor device to be determined by the Lidar sensor device by means of a transit time measurement for the detected reflected light component or by means of a phase difference measurement between the scanning light and the detected reflected light component.
- the determination can be understood here in terms of determining and / or calculating.
- the computing device has a data interface and is designed as a function of at least one, that is, one or more driving situation parameters provided via the data interface for determining the
- the distance determined by the computing device is thus determined automatically as a function of the driving situation parameter either by means of the travel time measurement for the detected reflected light component or by means of the phase difference measurement between the scanning light and the detected reflected light component. Depending on the driving situation parameter, an automatic switching or toggling between the transit time measurement or the phase difference measurement can therefore take place.
- the driving situation parameter can be provided by the motor vehicle or by the lidar sensor device via the data interface.
- an air density correction can optionally also be provided.
- This air density correction may be provided as a function of temperature and / or pressure and / or humidity of the air in the environment. This is due to the fact that the wavelength of light is dependent on the refractive index of the air and thus changes with temperature, pressure and humidity. Thus, a particularly accurate determination of the distance can then take place.
- a lidar sensor device can thus be realized, which can perform both measuring methods, ie the propagation time measurement and the phase difference measurement. Depending on the situation, it is automatically selected which of the two measuring methods makes the most sense in each situation.
- Driving situation according to or adapted to the particular driving situation with the respective more advantageous measurement method determine the distance.
- the computing device may be designed, at a travel speed which is less than a predefined limit value, for example less than 20 km / h, for determining the distance
- Phase difference measurement to use or activate and at a
- Ride situation parameter is represented and at low speeds, which typically also occurs at smaller distances than at higher speeds, by the computing device, the distance can be automatically provided or determined in a greater accuracy.
- the or one of the driving situation parameters includes or is information about a location, ie about a location of the motor vehicle.
- the driving situation parameter can thus be referred to as a location-dependent or location-dependent driving situation parameter.
- the computing device or the lidar sensor device may in this case have or be coupled to a navigation system and / or a position detection system with, for example, a global positioning sensor (GPS sensor). With the respective location, information regarding the use of the phase difference measurement or the transit time measurement for the determination of the distance can be coupled here.
- GPS sensor global positioning sensor
- the computing device can be configured to use or activate the phase difference measurement for determining the distance if the location belongs to a predefined first category and / or to use or activate the travel time measurement for determining the distance, if the location of one is assigned to the second predetermined category.
- the first category here may comprise parking spaces and / or multi-storey car parks and / or pedestrian zones, that is to say that parking lots, multi-storey car parks and / or pedestrian zones belong to the first category and / or the second category comprise highways and / or service streets.
- the or one of the driving situation parameters includes or is information about an activated driver assistance function of the motor vehicle.
- the computing device can be designed here, for example, to use the phase difference measurement for determining the distance or to activate if a driver assistance function for partially automatic and / or fully automatic parking is activated.
- the phase difference measurement for determining the distance or to activate if a driver assistance function for partially automatic and / or fully automatic parking is activated.
- Computing be configured, for example, for determining the distance to use the transit time measurement, if a driver assistance function is activated for automatic and / or fully automatic driving on a highway or expressway.
- Range is adapted to the particular driving situation, so that the
- Driver assistance function can be performed with increased reliability and, accordingly, the safety in operating the system is increased.
- Computing device is designed to determine the distance by means of the phase difference measurement again after determining the distance, if the size of the determined distance is below a limit and was determined by means of the transit time measurement.
- the calculating device can also be designed to determine the distance again by means of the transit time measurement after determining the distance, if the size of the determined distance lies above a further limit value and was determined by means of the phase difference measurement.
- the further limit value may in particular be the one limit value or identical thereto.
- the one and / or the further limit may be 20 and / or 15 and / or 10 meters. If the limit values are different, the further limit value is preferably greater than the one limit value.
- Detection period of at least one microsecond, in particular 2 microseconds or more than 2 microseconds is stored.
- Phase difference measurement is possible.
- a respectively determined intensity is forgotten or discarded earlier (ie not stored), so that in the prior art a new detection process is initially started when changing the measurement method from the transit time measurement to the phase difference measurement got to.
- the invention also relates to a lidar sensor device with a scanning device for scanning an environment of the motor vehicle with the scanning light and the
- Detecting device for detecting the light component of the scanning light reflected in the surroundings of the object and with a computing device according to one or more of the described embodiments.
- the scanning device has two different light sources for the scanning light and is designed to activate the one light source for the transit time measurement (in particular only) and for the phase difference measurement (in particular only) other light source.
- Each of the two light sources can also comprise a plurality of respective individual light sources, and the two light sources can thus be respective groups of light sources.
- the invention also relates to a motor vehicle with a lidar sensor device according to one of the described embodiments.
- the invention relates to a method for operating a lidar sensor device of a motor vehicle with a series of method steps.
- a method step is a scanning of an environment of the motor vehicle with a scanning light by a scanning device of the lidar sensor device.
- Another A method step is detecting a light component of the scanning light reflected by an object in the surroundings of the motor vehicle by means of a
- a subsequent method step is determining a distance of the object from the lidar sensor device by means of a transit time measurement for the detected reflected light component or by means of a
- Phase difference measurement between the scanning light and the detected reflected light component by a computing device of the lidar sensor device is an automatic activation of the transit time measurement or the phase difference measurement for measuring the distance as a function of at least one driving situation parameter provided by the motor vehicle via a data interface of the lidar sensor device or the measurement computing device.
- Advantages and advantageous embodiments of the method correspond here to advantages and advantageous embodiments of the computing device and the lidar sensor device.
- Embodiments of the invention will be explained in more detail with reference to a schematic drawing.
- the single figure shows a motor vehicle with an exemplary embodiment of a lidar sensor device.
- the motor vehicle 1 here has the sensor device 2 with a scanning device 3 for scanning an environment 4 of the motor vehicle 1 with a scanning light 5 and a detection device 6 for detecting a in the environment 4 of an object. 7 reflected light component 8 of the scanning light 5 on.
- the lidar sensor device 2 also has a computing device 9, which is designed to determine a distance d of the object 7 from the lidar sensor device 2 and thus the motor vehicle 1. This determination is carried out here by means of a transit time measurement for the detected reflected light component or by means of a phase difference measurement between the scanning light 5 and the detected reflected light component. It is important here that the
- Computing device 9 has a data interface 10 and is formed in
- Information about a driving speed of the motor vehicle 1 as a driving situation parameter can thus be provided to the lidar sensor device via the bus 11.
- the phase difference measurement can be used and at an increased travel speed, which is greater than the predetermined limit, the transit time measurement.
- the detected driving situation parameter includes information about a location of the motor vehicle 1, then, for example, the more accurate measuring mode, ie the phase difference measurement, can also be automatically used or activated during and after entry into a parking garage. This will work in tight environments, especially for automatic
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
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017108240.9A DE102017108240A1 (de) | 2017-04-19 | 2017-04-19 | Fahrsituationsabhängige Abstandsbestimmung für eine Kraftfahrzeug-Lidar-Sensorvorrichtung |
| PCT/EP2018/059712 WO2018192897A1 (de) | 2017-04-19 | 2018-04-17 | Fahrsituationsabhängige abstandsbestimmung für eine kraftfahrzeug-lidar-sensorvorrichtung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3612859A1 true EP3612859A1 (de) | 2020-02-26 |
Family
ID=62002647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18718431.2A Withdrawn EP3612859A1 (de) | 2017-04-19 | 2018-04-17 | Fahrsituationsabhängige abstandsbestimmung für eine kraftfahrzeug-lidar-sensorvorrichtung |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20230121106A1 (de) |
| EP (1) | EP3612859A1 (de) |
| DE (1) | DE102017108240A1 (de) |
| WO (1) | WO2018192897A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7654336B2 (ja) * | 2019-10-15 | 2025-04-01 | ソニーセミコンダクタソリューションズ株式会社 | 測距デバイス |
| US12162477B2 (en) | 2021-09-27 | 2024-12-10 | Ford Global Technologies, Llc | Systems and method for lidar grid velocity estimation |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3294726B2 (ja) * | 1994-12-20 | 2002-06-24 | 本田技研工業株式会社 | レーダ装置 |
| US5889490A (en) * | 1996-08-05 | 1999-03-30 | Wachter; Eric A. | Method and apparatus for improved ranging |
| DE19910667A1 (de) * | 1999-03-11 | 2000-09-21 | Volkswagen Ag | Vorrichtung mit mindestens einem Lasersensor und Verfahren zum Betreiben eines Lasersensors |
| DE102005045563A1 (de) * | 2005-08-29 | 2007-03-01 | Z+F Zoller & Fröhlich GmbH | Laserscanner und Verfahren zum Vermessen |
| KR100761462B1 (ko) * | 2006-05-23 | 2007-09-28 | 한국과학기술원 | 거리측정 센서 및 이를 이용한 거리 측정방법 |
| DE102010034140A1 (de) * | 2010-08-12 | 2012-02-16 | Valeo Schalter Und Sensoren Gmbh | Verfahren zum Anzeigen von Bildern auf einer Anzeigeeinrichtung und Fahrerassistenzsystem |
| DE102011001387A1 (de) | 2011-03-18 | 2012-09-20 | First Sensor AG | Verfahren zum mehrdimensionalen Abtasten eines Abtastfeldes mittels eines optischen Abtast- oder Scannersystems sowie optisches Abtastsystem |
| DE102011056050A1 (de) * | 2011-12-05 | 2013-06-06 | Continental Teves Ag & Co. Ohg | Einstellung von Entfernungstoren eines Umfeldsensors in Abhängigkeit von Umfeldinformationen |
| DE102013002650A1 (de) * | 2013-02-15 | 2014-08-21 | Volkswagen Aktiengesellschaft | Bestimmung einer Entfernungsinformation für ein Fahrzeug |
| DE102014223900A1 (de) * | 2014-11-24 | 2016-05-25 | Conti Temic Microelectronic Gmbh | Fahrzeug-Umfeld-Abtastung mittels eines phasengesteuerten Lasers |
| US10676057B2 (en) * | 2015-10-28 | 2020-06-09 | Lg Innotek Co., Ltd. | Optical output module, vehicle including same, and control method therefor |
| US20180067195A1 (en) * | 2016-09-08 | 2018-03-08 | Qualcomm Incorporated | Multi-tier light-based ranging systems and methods |
-
2017
- 2017-04-19 DE DE102017108240.9A patent/DE102017108240A1/de not_active Withdrawn
-
2018
- 2018-04-17 WO PCT/EP2018/059712 patent/WO2018192897A1/de not_active Ceased
- 2018-04-17 US US16/606,459 patent/US20230121106A1/en not_active Abandoned
- 2018-04-17 EP EP18718431.2A patent/EP3612859A1/de not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| DE102017108240A1 (de) | 2018-10-25 |
| WO2018192897A1 (de) | 2018-10-25 |
| US20230121106A1 (en) | 2023-04-20 |
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