EP4189422A1 - Dispositif de transmission d'un dispositif de détection optique, dispositif de détection, véhicule et procédé - Google Patents

Dispositif de transmission d'un dispositif de détection optique, dispositif de détection, véhicule et procédé

Info

Publication number
EP4189422A1
EP4189422A1 EP21746716.6A EP21746716A EP4189422A1 EP 4189422 A1 EP4189422 A1 EP 4189422A1 EP 21746716 A EP21746716 A EP 21746716A EP 4189422 A1 EP4189422 A1 EP 4189422A1
Authority
EP
European Patent Office
Prior art keywords
signal
transmission
electromagnetic
signals
transmission signals
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.)
Pending
Application number
EP21746716.6A
Other languages
German (de)
English (en)
Inventor
Jonas KRAUSE
Christoph Parl
Thorsten BEUTH
Oleg Loginenko
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.)
Valeo Schalter und Sensoren GmbH
Original Assignee
Valeo Schalter und Sensoren GmbH
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 Valeo Schalter und Sensoren GmbH filed Critical Valeo Schalter und Sensoren GmbH
Publication of EP4189422A1 publication Critical patent/EP4189422A1/fr
Pending legal-status Critical Current

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
    • G01S7/481—Constructional features, e.g. arrangements of optical elements
    • G01S7/4814—Constructional features, e.g. arrangements of optical elements of transmitters alone
    • 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
    • G01S7/4816—Constructional features, e.g. arrangements of optical elements of receivers alone
    • 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
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
    • G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
    • G01S2013/9327—Sensor installation details
    • G01S2013/93274—Sensor installation details on the side of the vehicles

Definitions

  • the invention relates to a transmission device of an optical detection device for monitoring at least one monitoring area for objects by means of electromagnetic transmission signals, with at least one signal source with which electromagnetic transmission signals can be generated, and with at least one signal influencing device with which the electromagnetic transmission signals can be influenced .
  • the invention also relates to a detection device for detecting objects in at least one surveillance area by means of electromagnetic transmission signals, with at least one transmission device with which electromagnetic transmission signals can be transmitted into the surveillance region, with at least one reception device with which electromagnetic reception signals can be received, which originate from electromagnetic transmission signals that are reflected in the monitoring area, and with which electromagnetic reception signals can be converted into evaluation signals that can be processed with an evaluation device, and with at least one evaluation device with which, on the basis of at least the electromagnetic reception signals, information about the monitoring area can be determined, the at least one transmission device having at least one signal source with which electromagnetic transmission signals can be generated , and at least one signal influencing device with which the electromagnetic transmission signals can be influenced.
  • the invention relates to a vehicle with at least one detection device for detecting objects in at least one surveillance area by means of electromagnetic signals.
  • the invention also relates to a method for detecting objects in at least one monitoring area with a detection device using electromagnetic transmission signals, in which at least one electromagnetic transmission signal is transmitted into the at least one monitoring area using at least one transmission device, with the at least one electromagnetic transmission signal is influenced with at least one signal influencing device, at least one received signal is received with a receiving device, which originates from at least one transmission signal that is reflected in the monitored area, information about the monitored area is determined at least on the basis of the at least one received signal.
  • An optical transmitting and receiving device of an optical detection device of a vehicle is known from DE 10 2016 118 481 A1.
  • the transmitting and receiving device has at least one optical transmitter for emitting at least one transmitted light beam, at least one scanning unit for at least changing the beam direction of the at least one transmitted light beam and at least one optical receiver for receiving at least one received light beam, which is relatively are arranged relative to one another in such a way that the at least one receiver can receive transmitted light beams emitted by the at least one transmitter, which are reflected back as received light beams by an object or obstacle that may be present in a transmitted beam path of the at least one transmitter.
  • the at least one scanning unit has at least one first signal influencing device for deflecting at least one transmitted light beam radiated into the at least one scanning unit by the at least one transmitter in a first direction and at least one second signal influencing device for changing a beam propagation of the at least one transmitted light beam in one direction second direction.
  • the at least one second signal influencing device is arranged in the beam path of the at least one transmitted light beam behind the at least one first signal influencing device.
  • the first direction and the second direction are perpendicular or oblique to each other.
  • the invention is based on the object of designing a transmission device, a detection device, a vehicle and a method of the type mentioned at the outset, in which the detection of objects can be improved.
  • the at least one signal influencing device has at least two different optical diffuser regions next to one another, viewed at least in a direction transverse to an optical axis of the at least one signal source, which have different scattering properties with regard to the electromagnetic transmission signals.
  • the at least one signal influencing device has a plurality of optical diffuser areas.
  • the signal components of the transmission signals that hit the respective diffuser areas can be influenced with different scattering properties. They can be scattered differently, diffracted, provided with phase shifts or influenced in some other way.
  • the different scattering properties can cause different signal intensities and/or different deflections for the corresponding signal components of the transmission signals.
  • the signal components of the transmission signals with the diffuser areas can be sent with different signal intensities in different directions.
  • the transmission device can be individually adapted to the operating conditions in which the detection device is to be operated. In this way, the detection of objects can be operated more efficiently.
  • the at least one signal influencing device can already be individually adapted during manufacture of the detector device and/or during assembly at the installation site, in particular in or on a vehicle.
  • the detection device can advantageously be constructed in a modular manner.
  • different signal influencing devices can be provided, which can be used in a modular manner, in particular in the production of the detection device.
  • the detection device can be individualized more easily.
  • the signal components of a transmission signal relate to the respective profile of the transmission signal transverse to its direction of propagation, in particular transverse to the optical axis of the signal source.
  • the main direction of propagation of a transmission signal can extend behind the signal source parallel or axially to the optical axis of the signal source.
  • the operating conditions can be an installation location of the detection device, in particular in or on a vehicle, and/or the orientation of the detection device.
  • distances to boundaries in the at least one monitoring area can be taken into account.
  • the at least one monitoring area can be limited in one direction by the ground. Vehicle parts that are located within the at least one monitoring area and that limit the detection range can also be taken into account.
  • At least one diffuser area can widen the signal components of the transmission signals impinging on it. In this way, a correspondingly larger field of view can be illuminated simultaneously.
  • the information about the monitored area can advantageously be object information about objects in the monitored area, in particular distances, directions and/or speeds of objects relative to the detection device.
  • the information about the surveillance area can also contain the information that no object is detected.
  • the information about the surveillance area can also contain that a detection range is limited, in particular, by visibility impairments such as fog, precipitation or the like.
  • the optical detection device can work according to a signal transit time method.
  • Optical de tektionsvorraumen working according to the signal runtime method can be configured and referred to as time-of-flight (TOF), light detection and ranging systems (LiDAR), laser detection and ranging systems (LaDAR) or the like will.
  • TOF time-of-flight
  • LiDAR light detection and ranging systems
  • LaDAR laser detection and ranging systems
  • the detection device can advantageously be designed as a so-called flash system, in particular as a flash LiDAR.
  • At least one signal source can be used to send out at least one transmission signal, which simultaneously illuminates all diffuser areas of the at least one signal influencing device.
  • the correspondingly influenced signal components of the at least one transmission signal can simultaneously emit part of the at least one monitoring area or the entire at least one monitoring area.
  • the detection device can be designed as a scanning system.
  • the diffuser areas and thus the at least one monitoring area can be successively sampled, ie scanned, with transmission signals.
  • the direction of propagation of the transmission signals can be swiveled over the diffuser areas.
  • At least a deflection device in particular a scanning device, a deflection mirror device or the like, can be used here.
  • the detection device can advantageously be designed as a laser-based distance measuring system.
  • the laser-based distance measuring system can have at least one laser, in particular a diode laser, as the signal source of the at least one transmission device.
  • pulsed transmission beams can be transmitted as transmission signals with the at least one laser.
  • the laser can be used to emit transmission signals in wavelength ranges that are visible or not visible to the human eye.
  • at least one receiver can have at least one receiving device, a sensor designed for the wavelength of the emitted light, in particular a line sensor or area sensor, in particular an (avalanche) photodiode, a photodiode line, a CCD sensor, an active pixel sensor , In particular a CMOS sensor or the like.
  • the laser-based distance measuring system can advantageously be a laser scanner.
  • a monitoring area can be scanned with a laser scanner, in particular with a pulsed laser beam.
  • the invention can be used in a vehicle, particularly a motor vehicle.
  • the invention can advantageously be used in a land vehicle, in particular a passenger car, a truck, a bus, a motorcycle or the like, an aircraft, in particular drones, and/or a watercraft.
  • the invention can also be used in vehicles that can be operated autonomously or at least partially autonomously. However, the invention is not limited to vehicles. It can also be used in stationary operation and/or in robotics.
  • the detection device can advantageously be connected to at least one electronic control device of the vehicle, in particular a driver assistance system and/or chassis control and/or a driver information device and/or a parking assistance system and/or gesture recognition or the like, or be part of such. In this way, at least some of the functions of the vehicle can be operated autonomously or partially autonomously.
  • the detection device can be used to detect stationary or moving objects, in particular vehicles, people, animals, plants, obstacles, bumps in the road, in particular potholes or stones, road boundaries, traffic signs, open spaces, in particular parking spaces, precipitation or the like.
  • At least one diffuser area can have or consist of at least one scattering means with which electromagnetic transmission signals can be scattered, and/or at least one diffuser area can have or consist of at least one diffraction means with which electromagnetic transmission signals can be diffracted, and/or or at least one diffuser area can have at least one diffractive optical structure with which scattering properties with regard to the electromagnetic transmission signals can be specified.
  • scattering means and/or diffraction means the signal components of the transmission signals that impinge on a diffuser area can be scattered in a targeted manner. In this way, the directions and/or the signaling intensity of the transmission signals on the exit side of the at least one signal influencing device can be influenced in a targeted manner.
  • diffractive optical structures are structures on which light beams, in particular transmission signals, can be formed. This happens as diffraction on optical gratings.
  • the diffractive optical structures can be designed individually. They can be implemented in such a way that the beam direction of an incident light beam is changed with the diffractive optical structure depending on the angle of incidence and/or a point of incidence on the diffractive optical structure. Diffractive optical structures can be operated in transmission and/or reflection.
  • At least one diffuser area can have or consist of at least one diffractive optical element.
  • At least two different optical diffuser areas can be assigned to at least two different regions of the monitoring area.
  • the transmission signals which impinge on the respective diffuser areas can be directed into the corresponding region with the corresponding scattering properties. In this way, a better individual adjustment of the transmission device to the existing or expected operating conditions of the detection device can be implemented.
  • the transmission device can implement respective signal intensities for at least two different regions.
  • the transmission signals can be transmitted proportionally to the respective regions with the required signal intensity.
  • the signal intensity can be adjusted to the detection range in the corresponding region. A larger detection range requires a greater signal intensity than a smaller detection range.
  • the signal intensities can be specifically adapted to the ambient conditions. A lower signal intensity is required in regions in which the detection range is already limited in particular by obstacles, for example the ground or the like.
  • the overall signal intensity of the transmission signals, which is generated by the at least one signal source, can thus be appropriately divided between the regions of the surveillance area.
  • At least two different optical diffuser regions can be arranged side by side in at least two orthogonal directions viewed transversely to the optical axis of the at least one signal source.
  • the signal components of the transmission signals can be specifically assigned to the regions of the monitoring area in two spatial directions transverse to the optical axis.
  • the dispersion properties of the diffuser areas can advantageously be specified as a function of possible operating situations, in particular a driving situation, of the vehicle. In this way, the efficiency of the measurements with the detection device can be improved.
  • the signal intensity of the corresponding signal component of the transmission signal can be limited by means of the corresponding scattering property of the associated diffuser area.
  • a detection range of the order of 100 m and more can be specified for a monitoring area in the direction of travel in front of the vehicle for a far-field region of the monitoring area.
  • the signal intensity of the corresponding signal component can be increased with the corresponding diffuser area. In this way, objects in front of the vehicle, in particular vehicles driving ahead, can be detected at an early stage.
  • the detection range in a region can also be limited by operational obstacles.
  • the diffuser areas assigned to the ground can have corresponding scattering properties, by means of which the signal intensity of the corresponding signal component of the transmitted signals in the corresponding region, in particular a ground region, of the monitoring area is reduced.
  • the diffuser areas which are associated with regions of the monitoring area above the vehicle convincing, can be specified so that with them the corresponding Signal components of the transmission signals is sent with a lower signal intensity. Objects that are above the vehicle height are of lesser interest because they generally do not pose a risk of collision.
  • the object is achieved according to the invention with the detection device in that the at least one signal influencing device has at least two different optical diffuser regions next to each other, viewed in a direction transverse to an optical axis of the at least one signal source, which have different scattering properties with regard to the electromagnetic transmission signals.
  • At least one transmission device can be a flash transmission device.
  • at least one transmission signal can be sent simultaneously to a number of regions of the surveillance area. The corresponding regions can thus be checked simultaneously during a measurement.
  • the object is achieved according to the invention in the vehicle in that the vehicle has at least one detection device with at least one transmission device according to the invention.
  • the object is achieved according to the invention in the method in that the at least one transmission signal is transmitted with the at least one transmission source to at least one of at least two diffuser areas of the at least one signal influencing device and, depending on the scattering properties of the at least one diffuser area, at least the signal components of the at least a transmission signal, which impinges on the at least one diffuser area, is scattered.
  • At least one signal component of the at least one transmission signal is influenced by the corresponding at least one diffuser area.
  • At least the signal components of the at least one transmission signal can be changed with regard to the signal intensity and/or the direction of propagation.
  • the at least one transmission signal can be assigned at least in proportion to corresponding regions of the monitoring area.
  • the signal intensity can be adapted to the corresponding region. Regions for which a large detection range is is required, especially in the far field, can be sampled in a targeted manner with signal components of the transmission signal with a correspondingly increased signal intensity.
  • FIG. 1 shows a front view of a vehicle with a driver assistance system and a LiDAR system for monitoring a monitoring area to the left of the vehicle in the direction of travel;
  • FIG. 2 shows a functional representation of the vehicle from FIG. 1 with the driver assistance system and the LiDAR system;
  • FIG. 3 shows a detailed view of a transmission device of the LiDAR system in the front view of the vehicle from FIG. 1;
  • FIG. 4 shows an intensity-angle diagram in which a normalized horizontal intensity curve of transmission signals, which are transmitted with a transmission device of the LiDAR system from FIGS. 1 and 2, is shown over the horizontal directional angle in relation to a main axis of the LiDAR system is;
  • FIG. 5 shows an intensity-angle diagram in which a normalized vertical intensity curve of transmission signals, which are transmitted with the transmission device of the LiDAR system from FIGS. 1 and 2, over the vertical Orientation angle related to the flat axis of the LiDAR system is shown.
  • FIG. 1 shows a front view of a vehicle 10 by way of example in the form of a passenger car.
  • Figure 2 shows a functional representation of the vehicle 10.
  • the x-axis extends in the direction of a vehicle longitudinal axis of vehicle 10
  • the y-axis extends along a vehicle transverse axis
  • the z-axis extends spatially upwards perpendicular to the x-y plane along a vehicle vertical axis.
  • the x-axis and y-axis extend horizontally in space and the z-axis extends vertically in space.
  • the vehicle 10 has an optical detection device, for example in the form of a LiDAR system 12.
  • the LiDAR system 12 is arranged, for example, on the side in an upper area of the vehicle 10 and is directed into a monitoring area 14, which is to the left of the vehicle 10 in the direction of travel 16 located.
  • the monitoring area 14 can be monitored for objects 18 with the LiDAR system 12 .
  • the LiDAR system 12 may also be located elsewhere on the vehicle 10 and oriented differently.
  • the vehicle 10 can also have a plurality of detection devices, including different ones.
  • the LiDAR system 12 can be used to detect stationary or moving objects 18, for example vehicles, people, animals, plants, obstacles, bumps in the road, in particular potholes or stones, road boundaries, traffic signs, open spaces, in particular parking spaces, precipitation or the like.
  • the vehicle 10 has a driver assistance system 20.
  • functions of the vehicle 10 can be operated autonomously or partially autonomously.
  • Driver assistance system 20 is functionally connected to LiDAR system 12 .
  • information about the monitoring area 14 which is recorded using the LiDAR system 12 can be transmitted to the driver assistance system 20 .
  • the information about the monitoring area 14 can be used, for example, to support operating functions of the vehicle 10, for example with regard to drive, steering and braking.
  • Information about the monitored area 14 can contain information about whether objects 18 are located in the monitored area 14, for example. If an object 18 is detected in the surveillance area 14 , the information about the surveillance area 14 can include object information about the detected object 18 .
  • the direction of an object 18 can, for example, as Angles can be specified in relation to reference axes. For example, the azimuth relative to the transverse axis of the vehicle 10 and the elevation relative to the vertical axis of the vehicle can be specified to characterize the direction.
  • the LiDAR system 12 includes, for example, a transmitting device 22, a receiving device 24 and a control and evaluation device 26.
  • Electromagnetic transmission signals 28 can be transmitted with the transmission device 22 .
  • the transmission signals 28 are, for example, pulsed laser beams with wavelengths in the near infrared, for example.
  • the LiDAR system 12 is what is known as a flash LiDAR system, in which a larger area is illuminated with a transmission signal 28 .
  • the transmission signals 28, which are in the monitoring area 14, for example, at an object 18 in the direction of the LiDAR system 12 are reflected when electromagnetic reception signals 30 are converted into corresponding electrical evaluation signals.
  • the electrical evaluation signals can be transmitted to the electronic control and evaluation device 26 of the LiDAR system 12 and processed with it.
  • the control and evaluation device 26 includes means for controlling the LiDAR system 12 and for processing the electrical evaluation signals. Alternatively, the means for control and the means for evaluation can also be designed separately. A control device and evaluation device can be implemented separately from one another. The means for control and evaluation are implemented in software and hardware. Parts of the control and evaluation device 26 or the entire control and evaluation device 26 can also be combined with an electronic control device of the vehicle 10, for example also with the driver assistance system 20.
  • the information about the monitored area 14 or the object information about the detected object 18 can be obtained with the LiDAR system 12 from the received signals 30 or the electrical evaluation signals.
  • the distance of the object 18 relative to the LiDAR system 12 can be determined using a signal propagation time method, in which the propagation time between the transmission of a transmission signal 28 and the receipt of the corresponding reception signal 30 is determined.
  • the transmitting device 22 is not shown in detail in FIG.
  • the transmission device 22 comprises a signal source 32 and a signal influencing device 34.
  • the signal source 32 includes, for example, a laser diode with which the transmission signals 28 can be generated.
  • the transmission device 22 can also have more than one signal source 32, for example a plurality of laser diodes.
  • the transmission signals 28 are sent in the direction of an optical axis 36 of the signal source 32 to the signal influencing device 34 .
  • the optical axis 36 runs, for example, parallel to the y-axis, ie parallel to the transverse axis of the vehicle.
  • the expansion of the transmission signals 28 transverse to the optical axis 36 so transverse to their direction of propagation is specified so that the Transmission signals 28 illuminate an entry side 38 of the signal influencing device 34 completely.
  • the direction of propagation of the transmission signals 28 behind the signal source 32 and in front of the signal influencing device 34 is indicated by the arrow symbol in FIG.
  • the signal influencing device 34 is implemented as a diffractive optical structure, for example.
  • the diffractive optical structure can be individually adapted to the operational requirements of the LiDAR system 12 .
  • the signal influencing device 34 comprises, for example, four diffuser areas, viewed from bottom to top in FIG.
  • the diffuser regions 40a, 40b, 40c and 40d each extend transversely to the optical axis 36, for example parallel to the x-z plane.
  • the diffuser regions 40a, 40b, 40c and 40d are arranged next to one another, viewed in the direction of the z-axis, one above the other in the illustration in FIG.
  • the diffuser regions 40a, 40b, 40c and 40d each extend over the same width parallel to the x-axis and with un ferent fleas parallel to the z-axis.
  • the diffuser regions 40a, 40b, 40c and 40d have different scattering properties with respect to the transmission signals 28.
  • the transmission signals 28 can be deflected in different ways with the diffuser regions 40a, 40b, 40c and 40d.
  • the portion of the transmission signals 28 which impinges on the floor diffuser region 40a in Figure 3 is diffracted downwards to the floor 42, for example to the roadway, by the corresponding diffractive optical structure as the floor signal portion 28a, and in the vertical direction, i.e. in Direction parallel to z-axis, flared.
  • the ground signal portion 28a illuminates a ground region 44a of the surveillance area 14 .
  • the floor region 44a is delimited by the floor 42 and extends up to a floor detection range 46a, which is indicated in FIG.
  • a bottom signal intensity Int_a of the bottom Signal portion 28a adjusted so that it is sufficient to illuminate the bottom region 44a to the bottom detection range 46a.
  • a respective detection range is the distance from the LiDAR system 12 up to which the LiDAR system 12 can detect any objects 18 .
  • the detection range can be specified, for example, by the length of a measurement window within which the reflection of a transmitted transmission signal is expected.
  • the portion of the transmission signals 28 that impinges on the near-field diffuser area 40b is also bent by the corresponding diffractive optical structure as a near-field signal portion 28b in the direction of the bottom 42 in a near-field region 44b, which is located next to the bottom region 44a and widened in the vertical direction.
  • the near-field signal portion 28b illuminates the near-field region 44b of the surveillance area 14.
  • the near-field region 44b in the floor 42 delimits and extends up to a near-field detection range 46b of approximately 10 m, for example. to illuminate the near-field region 44b to the near-field detection range 46b. Since the near-field detection range 46b is greater than the ground detection range 46a, the near-field signal intensity Int_b is correspondingly greater than the ground signal intensity Int_a.
  • the portion of the transmission signals 28 which strikes the far-field diffuser area 40c is diffracted by the corresponding diffractive optical structure as a far-field signal portion 28c into a far-field region 44c and widened in the vertical direction.
  • the far-field signal component 28c illuminates the far-field region 44c of the surveillance area 14 .
  • Far-field region 44c extends next to vehicle 10 up to a far-field detection range 46c of approximately 40 m, for example.
  • Far-field region 44c extends above and below a main axis 48 of LiDAR system 12.
  • Main axis 48 extends, for example parallel to the y-axis, usually spatially horizontal.
  • the far-field region 44 has, for example, a vertical opening angle 50 of approximately 25°.
  • a far-field signal intensity Int_c of the far-field signal component 28c is set with the far-field diffuser area 40c such that it is sufficient to illuminate the far-field region 44c up to the far-field detection range 46c. Because the far-field detection range 46c is greater than the near-field Detection range 46b, the far-field signal intensity Int_c is greater than the near-field signal intensity Int_b.
  • the portion of the transmission signals 28 which impinges on the height diffuser area 40d is diffracted obliquely upwards by the corresponding diffractive optical structure as a height signal portion 28d in a height region 44d and widened in the vertical direction.
  • the high-altitude region 44b is above the far-field region 44c.
  • the high-altitude signal component 28d illuminates the high-altitude region 44d of the surveillance area 14 .
  • the height region 44d extends up to a height detection range 46d of approximately 10 m, for example. A greater detection range is not required for the height region 44d since any objects 18 are located in the height region 44d above the vehicle 10 and there is no risk of collision.
  • a height signal intensity Int_d of the height signal portion 28d is set with the height diffuser area 40d such that it is sufficient to illuminate the height region 44d up to the height detection range 46d. Since the high-altitude detection range 46d is approximately as large as the near-field detection range 46b, the high-altitude signal intensity Int_d is approximately as large as the near-field signal intensity Int_b.
  • FIG. 4 An intensity-angle diagram is shown in FIG. 4 as an example, in which a normalized horizontal intensity profile of a transmission signal 28 dispersed by the signal influencing device 34 is shown over a horizontal directional angle in relation to the main axis 48 of the LiDAR system 12.
  • the main axis 48 lies at the horizontal direction angle 0°.
  • the horizontal opening angle of the LiDAR system 12 is approximately 110°, for example.
  • the normalized horizontal intensity curves of the ground signal intensity Int_a, the near-field signal intensity Int_b, the far-field signal intensity Int_c and the height signal intensity Int_d are identical and correspond to the representation in Figure 4.
  • FIG. 5 An intensity-angle diagram is shown in FIG. 5 as an example, in which a normalized vertical intensity profile of a transmission signal 28 dispersed by the signal influencing device 34 is shown over a vertical directional angle in relation to the main axis 48 of the LiDAR system 12.
  • the main axis 48 is for example stick at the vertical direction angle 0°.
  • the vertical opening angle of the LiDAR system 12 is approximately 80°, for example.
  • the normalized vertical intensity profile is made up of the respective intensity profiles of the ground signal intensity Int_a, the near-field signal intensity Int_b, the far-field signal intensity Int_c and the height signal intensity Int_d.
  • the normalized vertical intensity curve has its maxima between the vertical directional angles of 5° and 30°. The expansion of the maxima over the angular range corresponds to the aperture angle 50 of the far-field region 44 of approximately 25°.
  • the receiving device 24 has an optical imaging system, beispielswei se in the form of an optical lens, a receiver, for example in the form of a CCD chip, and electronic components.
  • the optical system is located between the receiver 24 and the surveillance area 14.
  • transmission signals 28 are generated with the transmission device 22 and sent to the signal influencing device 34 .
  • the diffuser areas namely the bottom diffuser area 40a, the near-field diffuser area 40b, the far-field diffuser area 40c and the high-level diffuser area 40d
  • the corresponding portions of the transmitted signals 28 are scattered and used as the ground signal portion 28a, the near-field signal portion 28b, far-field signal portion 28c and height-signal portion 28d with the respective intensities, namely the ground signal intensity Int_a, the near-field signal intensity Int_b, the far-field signal intensity Int_c and the height-signal intensity Int_d, in the corresponding region of the monitoring area 14, namely into the bottom region 44a, the near-field region 44b, the far-field region 44c and the high-altitude region 44d, respectively.
  • the ground signal components 28a, near-field signal components 28b, far-field signal components 28c and altitude signal components 28d, which strike an object 18 in the monitored area 14, are reflected accordingly, received as corresponding received signals 30 with the receiving device 24 and converted into electrical evaluation signals .
  • the electrical evaluation signals are transmitted to the control and evaluation device 26 .
  • the evaluation signals With the control and evaluation device 26, the evaluation signals the object information of the object 18, namely the distance, the direction and the speed of the detected object 18 relative to the LiDAR system 12, is determined.
  • the object information is transmitted to driver assistance system 20 .
  • driver assistance system 20 With the driver assistance system 20 corresponding operating functions of the vehicle 10 are influenced on the basis of the object information, for example controlled or regulated.
  • the vehicle 10 can thus be operated autonomously or partially autonomously.

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  • 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)
  • Traffic Control Systems (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

L'invention concerne un dispositif de transmission (22) d'un dispositif de détection optique (12) pour surveiller au moins une zone de surveillance (14) d'objets (18) à l'aide de signaux de transmission électromagnétiques (28). L'invention concerne également un dispositif de détection (12), un véhicule (10), et un procédé de fonctionnement du dispositif de détection optique (12). Le dispositif de transmission (22) comprend au moins une source de signal (32), au moyen de laquelle des signaux de transmission électromagnétiques (28) peuvent être générés, et au moins un dispositif d'influence de signal (34), au moyen duquel les signaux de transmission électromagnétiques (28) peuvent être influencés. Ledit au moins un dispositif d'influence de signal (34) présente au moins deux zones de diffusion optique différentes (40a, 40b, 40c, 40d) qui, observées au moins dans une direction transversale à l'axe optique (36) de ladite au moins une source de signal (32), sont disposées l'une à côté de l'autre et présentent des propriétés de diffusion différentes par rapport aux signaux de transmission électromagnétiques (28).
EP21746716.6A 2020-07-27 2021-07-20 Dispositif de transmission d'un dispositif de détection optique, dispositif de détection, véhicule et procédé Pending EP4189422A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020119729.2A DE102020119729A1 (de) 2020-07-27 2020-07-27 Sendeeinrichtung einer optischen Detektionsvorrichtung, Detektionsvorrichtung, Fahrzeug und Verfahren
PCT/EP2021/070231 WO2022023117A1 (fr) 2020-07-27 2021-07-20 Dispositif de transmission d'un dispositif de détection optique, dispositif de détection, véhicule et procédé

Publications (1)

Publication Number Publication Date
EP4189422A1 true EP4189422A1 (fr) 2023-06-07

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EP21746716.6A Pending EP4189422A1 (fr) 2020-07-27 2021-07-20 Dispositif de transmission d'un dispositif de détection optique, dispositif de détection, véhicule et procédé

Country Status (7)

Country Link
US (1) US20230266442A1 (fr)
EP (1) EP4189422A1 (fr)
JP (1) JP2023535797A (fr)
KR (1) KR20230041803A (fr)
CN (1) CN116235078A (fr)
DE (1) DE102020119729A1 (fr)
WO (1) WO2022023117A1 (fr)

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CN116202512B (zh) * 2023-05-06 2023-07-21 湖北工业大学 一种基于计算机视觉的ar导航装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009040325A1 (de) * 2009-09-05 2011-03-17 Conti Temic Microelectronic Gmbh Sensorsystem zur Erfassung von Umgebungsobjekten
KR101551667B1 (ko) * 2013-11-27 2015-09-09 현대모비스(주) 라이다 센서 시스템
DE102015112296A1 (de) 2015-07-28 2017-02-02 Valeo Schalter Und Sensoren Gmbh Optische Sensorvorrichtung für ein Kraftfahrzeug, Kraftfahrzeug sowie Verfahren
DE102016118481A1 (de) 2016-09-29 2018-03-29 Valeo Schalter Und Sensoren Gmbh Abtasteinheit einer optischen Sende- und Empfangseinrichtung einer optischen Detektionsvorrichtung eines Fahrzeugs
DE102017105210A1 (de) * 2017-03-13 2018-09-13 Valeo Schalter Und Sensoren Gmbh Optische Abstrahlvorrichtung für Laserpulse mit selektiver Optik
DE102018212735A1 (de) 2018-07-31 2020-02-06 Robert Bosch Gmbh LIDAR-Vorrichtung mit mindestens einem Streuscheibenelement
DE102018212823A1 (de) 2018-08-01 2020-02-06 Robert Bosch Gmbh LIDAR-Vorrichtung zur Erfassung eines Objektes
DE102018125591B4 (de) 2018-10-16 2021-02-04 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Optisches Abstandsermittlungsmodul

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Publication number Publication date
JP2023535797A (ja) 2023-08-21
DE102020119729A1 (de) 2022-01-27
KR20230041803A (ko) 2023-03-24
CN116235078A (zh) 2023-06-06
US20230266442A1 (en) 2023-08-24
WO2022023117A1 (fr) 2022-02-03

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