EP3994482A1 - Dispositif de mesure optique pour la détermination d'informations d'objet pour des objets dans au moins une zone de surveillance - Google Patents

Dispositif de mesure optique pour la détermination d'informations d'objet pour des objets dans au moins une zone de surveillance

Info

Publication number
EP3994482A1
EP3994482A1 EP20736613.9A EP20736613A EP3994482A1 EP 3994482 A1 EP3994482 A1 EP 3994482A1 EP 20736613 A EP20736613 A EP 20736613A EP 3994482 A1 EP3994482 A1 EP 3994482A1
Authority
EP
European Patent Office
Prior art keywords
receiver
measuring device
optical measuring
receiving
light
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
EP20736613.9A
Other languages
German (de)
English (en)
Inventor
Thorsten BEUTH
Urs ZYWIETZ
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 EP3994482A1 publication Critical patent/EP3994482A1/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
    • G01S7/4811—Constructional features, e.g. arrangements of optical elements common to transmitter and receiver
    • G01S7/4813—Housing arrangements
    • 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
    • G01S17/88—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
    • 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
    • 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
    • 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
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0006—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means to keep optical surfaces clean, e.g. by preventing or removing dirt, stains, contamination, condensation
    • 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
    • G01S2007/4977—Means for monitoring or calibrating of sensor obstruction by, e.g. dirt- or ice-coating, e.g. by reflection measurement on front-screen including means to prevent or remove the obstruction

Definitions

  • Optical measuring device for determining object information from objects in at least one monitoring area
  • the invention relates to an optical measuring device for determining object information from objects in at least one monitoring area, which has at least one receiving device for receiving light signals which come from at least one object,
  • the at least one receiving device comprises at least one electro-optical receiver for converting light signals into electrical signals
  • At least one light diffraction element is net angeord in a receiver light path of the at least one receiving device in front of the at least one receiver.
  • an optical measuring device which comprises a housing.
  • a transmission window is Amberlite det on a front wall. Pulsed laser light is emitted outwards through the transmission window.
  • the housing includes a reception window on the front wall below the transmission window. Laser beams reflected back from objects detected in the vehicle environment are received via the receiving window and processed by a receiving unit arranged in the housing.
  • the receiving unit comprises a receiver board on which, for example, an optical receiver designed as a detector is arranged, and also has receiving optics which can alswei sen a receiving lens and a deflecting mirror as a receiving deflecting mirror.
  • the optical receiver is preferably an APD diode.
  • the receiving lens is square in terms of its circumferential contour.
  • the invention is based on the object of designing a measuring device of the type mentioned above, in which the determination of object information, in particular the illumination of the optical receiver with light signals, can be improved.
  • the at least one receiver has several reception areas which are arranged one behind the other when viewed in the direction of at least one receiver axis and which can be evaluated separately with regard to the light intensity received,
  • At least one boundary edge of at least one light diffraction element in the projection onto the at least one receiver, viewed at least in sections, does not run perpendicular to the at least one receiver axis.
  • the at least one receiver has a plurality of receiving areas on which the light signals can fall and which can be evaluated separately.
  • a spatially resolved measurement is possible with the help of the multiple reception areas. Based on the respective assignment of the light signals to the receiving areas, the directions can be determined from which the detected light signals come and the corresponding objects are located.
  • light is understood to mean electromagnetic radiation that is visible and invisible to the human eye.
  • the receiving areas are arranged one behind the other along at least one receiving axis. Since at least one boundary edge of at least one light diffraction element does not run perpendicular to at least one receiver axis, at least in sections, corresponding diffraction effects in the direction of the at least one receiver axis are reduced. In this way, a crosstalk becomes a so-called "crosstalk", reduced between neighboring reception areas.
  • a symmetry of the optical measuring device is used in order to influence the direction of diffraction of diffraction effects and thus to reduce crosstalk of light signals to several receiving areas.
  • the optical measuring device can advantageously have at least one transmitting device.
  • Light signals can be generated with the transmitting device.
  • the optical measuring device can advantageously have at least one light signal deflecting device.
  • the light signal deflection device With the light signal deflection device, light signals from the at least one transmitting device can be directed into the at least one monitoring area and / or light signals can be directed from the at least one monitoring area to the at least one receiving device.
  • the optical measuring device can advantageously have at least one control and evaluation device. At least one transmitting device and / or at least one receiving device and / or at least one light signal deflecting device can be controlled with the control and evaluation device. Furthermore, electrical signals coming from the at least one receiving device, which can in particular characterize object information, can be received, evaluated and / or, if necessary, forwarded in particular to a driver assistance system with the control and evaluation device.
  • the at least one measuring device can advantageously operate according to a light transit time, in particular a light pulse transit time method.
  • Optical measuring devices operating according to the light pulse transit time method can be designed and designated as time-of-flight (TOF), light detection and ranging systems (LiDAR), laser detection and ranging systems (LaDAR) or the like. Since a transit time from the transmission of a transmission signal, in particular a light pulse, is measured with a transmitter and the reception of the corresponding reflected transmission signal with a receiver and a distance between the measuring device and the detected object is determined therefrom.
  • the measuring device can advantageously be designed as a scanning system. A monitoring area can be scanned, i.e. scanned, with transmission signals.
  • the corresponding transmission signals in particular transmission beams, can be swiveled over the monitoring area with respect to their direction of propagation.
  • At least one deflecting device in particular a scanning device, a deflecting mirror device or the like, can be used here.
  • the measuring device can be designed as a flash LiDAR.
  • the monitoring area can be illuminated simultaneously with at least one light signal.
  • the measuring device can advantageously be designed as a laser-based distance measuring system.
  • the laser-based distance measuring system can have at least one laser as the light source. With the at least one laser, in particular, pulsed transmission beams can be transmitted as transmission signals.
  • the laser-based distance measuring system can advantageously be a laser scanner. With a laser scanner, a monitored area can be scanned with a particularly pulsed laser beam.
  • the invention can be used in a vehicle, in particular 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 and / or a watercraft.
  • the invention can also be used in vehicles that can be operated autonomously or at least partially autonomously.
  • the invention is not limited to vehicles. It can also be used in stationary operation.
  • the measuring device can advantageously be connected or part of at least one electronic control device of a vehicle, in particular a driver assistance system and / or a chassis control and / or a driver information device and / or a parking assistance system and / or gesture recognition or the like. In this way, at least partially autonomous operation of the vehicle can be made possible.
  • optical measuring device stationary or moving objects, in particular vehicles, people, animals, plants, obstacles, uneven road surfaces, especially special potholes or stones, lane boundaries, traffic signs, free spaces, especially parking spaces, or the like, are recorded.
  • At least one boundary edge of at least one light diffraction element be at least one edge of at least one optical lens
  • At least one boundary edge of at least one light diffraction element can be an edge of a diaphragm or mask
  • At least one boundary edge of at least one light diffraction element can be an edge of a window of a housing of the measuring device.
  • At least one edge of at least one optical lens can advantageously have a course according to the invention. In this way, the light diffractive influence can easily be adjusted directly on the lens.
  • At least one diaphragm or mask can advantageously be arranged on at least one optical lens.
  • the at least one diaphragm or mask can cover at least one edge of the optical lens.
  • light diffraction at the edge of the optical lens can be prevented. Instead, the light diffraction takes place at the edge of the at least one diaphragm or mask.
  • At least one edge of the at least one diaphragm or mask can have a course according to the invention.
  • At least one braid can advantageously be arranged on a window of a housing of the measuring device. In this way, the window can be tempered. This can reduce the risk of the window misting up.
  • An edge of a window of a housing of the measuring device can advantageously have a course according to the invention. In this way, the light diffractive influence can easily be adapted directly to the window.
  • the window of the housing of the measuring device can advantageously be arranged in the receiver light path. Light signals from the monitoring area can reach the at least one receiver through the window.
  • more than 7/10 of the extent of at least one delimiting edge of at least one light diffraction element in the projection onto the at least one receiver can not run perpendicular to the at least one receiver axis. In this way, crosstalk to a number of reception areas is reduced and the at least one boundary edge is extended transversely to the at least one receiver axis.
  • no section of the at least one delimiting edge can extend perpendicular to the at least one receiver axis. In this way, crosstalk in the direction of the at least one receiver axis can be minimized.
  • At least one boundary edge of at least one light diffraction element can run zigzag at least in sections and / or at least in sections wavy and / or at least in sections zigzag with flattened and / or rounded tips and / or at least in sections have a free curve.
  • an extension of the at least one light diffraction element can be achieved transversely to the at least one receiver axis, wherein the extension perpendicular to the at least one receiver axis can be minimized.
  • the course of at least one boundary edge can advantageously vary.
  • the course can be adapted in a more flexible manner, in particular to the geometry of the measuring device, in order to reduce the influence of the diffraction pattern with regard to talking.
  • the optical measuring device can have a housing in which at least one receiving device is arranged, and the housing can have at least one window through which light signals from the monitoring area can reach the at least one receiving device.
  • the at least one receiving device and possibly further components can be accommodated in a protected manner in the housing.
  • the at least one window can be transparent to light signals, in particular received light signals.
  • the at least one window can have at least one heating device, in particular at least one heating wire. The heating device, in particular at least one heating wire, can prevent the at least one window from misting up.
  • At least one receiver can have several individual receiving elements, each with at least one receiving area and / or at least one receiver can have at least one line-like or area-like arrangement of a plurality of receiving areas. Individual receiving elements can simply be read out separately and the corresponding information evaluated. Line or area arrangements of several Emp catch areas can be produced together.
  • At least one receiver can have or consist of at least one detector, in particular a line sensor or area sensor, in particular several (avalanche) photodiodes, a line of photodiodes, a CCD sensor or the like.
  • at least one detector in particular a line sensor or area sensor, in particular several (avalanche) photodiodes, a line of photodiodes, a CCD sensor or the like.
  • At least one rectangular or square optical lens can be arranged in the receiver light path.
  • the light signals can be mapped better to receiving areas arranged in rows or areas than is possible with round optical lenses.
  • the edges of the optical lens can be viewed as limiting edges in which diffraction patterns can be generated.
  • the optical measuring device can be designed to determine at least one direction of at least one detected object relative to the measuring device. In this way, positions and / or dimensions of objects in particular in the direction of the at least one receiver axis can be determined. A height and / or a width of an object can be determined with the aid of the optical measuring device.
  • the optical measuring device can additionally be designed to determine at least one distance and / or a speed of a detected object relative to the measuring device.
  • this object information an object can be better characterized, in particular identified. If necessary, the object information can be transmitted to a driver assistance system of a vehicle that carries the optical measuring device, so that the vehicle can be operated autonomously or partially autonomously.
  • FIG. 1 shows a front view of a motor vehicle, with an optical measuring device for monitoring a monitoring area in the direction of travel in front of the motor vehicle;
  • Figure 2 shows a longitudinal section of an optical measuring device according to a first
  • FIG. 3 shows a view through a window of the optical measuring device from FIG. 2;
  • FIG. 4 shows a view through a window of an optical measuring device according to a second exemplary embodiment, which can be used in the vehicle from FIG. 1;
  • FIG. 5 shows a view through a window of an optical measuring device according to a third exemplary embodiment, which can be used in the vehicle from FIG. 1;
  • FIG. 6 shows a view through a receiving lens of the optical measuring devices of Figure 2;
  • FIG. 7 shows a view through a receiving lens of an optical measuring device according to a fourth exemplary embodiment, which can be used in the vehicle from FIG.
  • FIG. 8 shows a longitudinal section of an optical measuring device in which the invention is not used
  • FIG. 9 shows a view through a window of the optical measuring device from FIG. 8.
  • a motor vehicle 10 is shown as an example in the form of a passenger car in a front view.
  • the motor vehicle 10 has a driver assistance system 12 with which the motor vehicle 10 can be operated autonomously or partially autonomously in a manner that is not of further interest here.
  • the motor vehicle 10 has an optical measuring device 14, which is arranged, for example, in the front bumper. With the optical measuring device 14, a monitoring area 16 designated in FIG. 2 can be monitored for objects 18 in the direction of travel in front of the motor vehicle 10.
  • the optical measuring device 14 can also be arranged at a different location on the motor vehicle 10 and oriented differently.
  • stationary or moving objects 18 for example vehicles, people, animals, plants, obstacles, uneven roads, in particular potholes or stones, road boundaries, traffic signs, open spaces, in particular parking spaces, or the like, can be detected.
  • object information for example distances, directions and speeds of detected objects 18 relative to the optical measuring device 14, that is to say relative to the motor vehicle 10, can be determined.
  • the measuring device 14 can be configured, for example, as a laser-based distance measuring system, for example as a LiDAR system.
  • the optical measuring device 14 is connected to the driver assistance system 12 in terms of signals.
  • Object information from objects 18 that are detected with the optical measuring device 14 is transmitted to the driver assistance system 12.
  • the object information is processed with the driver assistance system 12 and can be used to control functions of the motor vehicle 10.
  • an optical measuring device 14 according to a first embodiment is shown in a longitudinal section.
  • the optical measuring device 14 comprises a housing 20.
  • the housing 20 has a window 22 on its side facing the monitoring area 16.
  • a transmitting device 24, a receiving device 26 and a control and evaluation device 28 are arranged in the housing 20.
  • the transmission device 24 When the measuring devices 14 are in operation, the transmission device 24 generates transmission light signals 30, for example in the form of laser pulses.
  • the transmitted light signals 30 can, for example, not be visible to the human eye.
  • the window 22 is made of a material that is permeable to the transmitted light signals 30.
  • the transmission light signals 30 are transmitted through the window 22 into the monitoring area 16.
  • a light signal deflecting device (not shown), for example a deflecting mirror device or the like, can be arranged in the housing 20, with which the transmitted light signals 30 can be directed into the monitoring area 16.
  • the transmitted light signals 30 are reflected on objects 18 in the monitoring area 16.
  • the transmitted light signals 30 reflected in the direction of the measuring device 14 are referred to below as received light signals 32 for better differentiation.
  • the received light signals 32 pass through the window 22 to the receiving device 26.
  • the received light signals 22 can be deflected in the housing 20 with the deflecting mirror device.
  • the received light signals 32 are converted into electrical signals and transmitted to the control and evaluation device 28.
  • the object information namely the distance, the direction and the speed of the detected object 18 relative to the measuring device 14, is determined from the detected received light signals 32.
  • the object information is transmitted to the driver assistance system 12 with the control and evaluation device 28.
  • the receiving device 26 includes, for example, a receiver 34 and an optical receiving lens 36.
  • the receiving lens 36 and the window 22 are located in a receiver light path 38 of the receiver 34.
  • the receiver light path 38 in the sense of the invention is the path that the received light signals 32 from the Take object 18 coming.
  • the receiver light path 38 is only indicated as a dashed axis for the sake of better clarity. This axis is intended to indicate the center of the receiver light path 38.
  • the receiver light path 38 is actually to be understood as a three-dimensional space which, for example in FIG. 2, extends from the axis upwards, downwards, into the plane of the drawing and away from the plane of the drawing.
  • the receiving lens 36 is located between the window 22 and the receiver 34. With the receiving lens 36, the received light signals 32 are focused on the receiver 34.
  • the receiver 34 has several receiving areas 40.
  • the receiving areas 40 can each be implemented as an avalanche photo diode, for example.
  • the reception areas 40 are arranged one behind the other as viewed in the direction of a receiver axis 42.
  • the receiver axis 42 runs spatially vertically with the normal direction of the motor vehicle 10, as shown in FIG. 2, so that the receiving areas 40 are arranged there one above the other.
  • spatial flea information relating to the detected object 18 can be determined with the receiver 34.
  • the receiver 34 can also be implemented as a line sensor, which has a plurality of image points which are arranged correspondingly along the receiver axis 42.
  • the receiving lens 36 is designed as square, in particular square or right-angled.
  • the receiving lens 36 is shown in FIG. 6 in front of the receiver 34.
  • the window 22 has not been shown in FIG.
  • the receiving lens 36 is aligned in such a way that two of its edges, namely the upper edge 46 and the lower edge 48, run perpendicular to the receiver axis 42 when viewed on the receiver 34.
  • Two masks 44 are arranged on the receiving lens 36.
  • the masks 44 are located, for example, on the side of the receiving lens 36 facing the receiver 34.
  • One of the masks 44 extends along the upper edge 46 of the receiving lens 36 and covers the upper edge 46.
  • the other mask 44 extends along the lower edge 48 the receiving lens 36 and covers the lower edge 48.
  • the masks 44 each have a zigzag-shaped boundary edge 50 on their mutually facing sides.
  • the masks 44 each act as light diffraction elements for the received light signals 32. It is known that lines and edges generate diffraction patterns according to their orientation. Diffraction patterns which expand in the receiving areas 40 in the direction of the receiver axis 42 can lead to crosstalk between the receiving areas 40. The zigzag-shaped boundary edges 50 of the masks 44 do not run in the projection onto the receiver 34 at right angles to the receiver axis 42. In this way it is achieved that the diffraction patterns, which are caused by the boundary edges 50, are shown in the receiving areas 40 in the direction of Receiver axis 42 is reduced.
  • two heating wires 52 are arranged on the window 22.
  • the heating wires 52 are protected from the environment, for example, on the inside of the window 22 facing the interior of the housing 20.
  • the heating wires 52 are connected to a power supply, which is not shown for reasons of clarity.
  • the temperature of the window 22 can be controlled with the heating wires 52, for example to prevent the window 22 from misting up or icing up.
  • the heating wires 52 are located in the receiver light path 38 and thus also act as Light diffraction elements for the received light signals 32.
  • the upper edges of the heating wires 52 in FIGS. 2 and 3 each form delimiting edges 54.
  • the heating wires 52 and the delimiting edges 54 have a zigzag shape.
  • the boundary edges 54 do not run in any section perpendicular to the receiver axis 42. In this way, it is achieved that widenings of the diffraction patterns caused by the boundary edges 54 in the reception areas 40 in the direction of the receiver axis 42 is reduced.
  • transmission light signals 30 are generated with the transmission device 24 and transmitted through the window 22 into the monitoring area 16.
  • the received light signals 32 reflected on an object 18 first pass through the window 22.
  • diffraction patterns are generated at the boundary edges 54 of the heating wires 52. Due to the zigzag shape of the delimiting edges 54, the diffraction patterns extend essentially at an angle to the receiver axis 42.
  • the received light signals 32 are focused on the receiver 34 with the receiving lens 36.
  • diffraction patterns are generated at the delimitation edges 50 of the masks 44. Because of the zigzag shape of the boundary edges 50, the diffraction patterns extend essentially at an angle to the receiver axis 42.
  • the corresponding received light signals 32 illuminate the receiver 34 at a corresponding height in an illumination area 56 indicated in FIG. 2.
  • the shape of the illumination area 56 is determined by the diffraction pattern at the boundary edges 50 and 54 are generated.
  • the illumination area 56 is indicated by way of example as a star only for the purpose of illustration, with the points of the star each run obliquely to the receiver axis 42.
  • the actual shape of the illumination area 56 depends, among other things, on the course of the delimiting edges 50 and 54 and their arrangement.
  • the representation of the receiving lens 36 and the transmitting device 24 is omitted.
  • the illumination area 56 in the exemplary embodiment shown only illuminates the second receiving areas 40 from above.
  • the zigzag shape of the boundary edges 50 and 54 in each case ensures that there is no or at least greatly reduced crosstalk to the neighboring, namely the first and third receiving areas 40 from above.
  • Flea information about the object 18 can be obtained from the received light signals 32, which are detected with the reception area 40, which is hit by the illumination area 56.
  • FIG. 4 a window 22 with heating wires 52 according to a second exemplary embodiment is shown.
  • Those elements that are similar to those of the first109sbei game from Figures 2 and 3 are hen with the same reference numerals.
  • the second exemplary embodiment differs from the first exemplary embodiment in that the heating wires 52 run in a sawtooth shape.
  • FIG. 5 a window 22 with heating wires 52 according to a third embodiment is shown.
  • the third exemplary embodiment differs from the first exemplary embodiment in that the zigzag-shaped heating wires 52 have flattened tips at their reversal points. For example, more than 7/10 of the extent of the respective delimitation edges 54 in the projection onto the receiver 34 do not run perpendicular to the receiver axis 42.
  • FIG. 7 shows a receiving lens 36 with masks 44 and a receiver 34 of a measuring device 14 according to a fourth exemplary embodiment.
  • the fourth exemplary embodiment differs from the first exemplary embodiment in that the receiving areas 40 of the receiver 34 are arranged flat in rows and columns.
  • the receiver 34 has a vertical receiving axis 42a and a horizontal receiving axis 42b. With the planar receiver 34, spatially horizontal and spatially vertical directional information about the object 18 can be determined relative to the measuring device 14.
  • the lateral edges 58 are covered with masks 44 that run vertically. Analogous to the horizontally running masks 44, the lateral masks 44 each have zigzag-shaped delimiting edges 54 on the upper edge 46 and the lower edge 48.
  • FIGS. 8 and 9 a measuring device 14 not according to the invention is shown only for comparison, in which the braiding wires 52 do not run in a zigzag shape but straight and, viewed in the projection, perpendicular to the receiver axis 42, i.e. not a corresponding invention.
  • the upper edge 46 which is viewed perpendicular to the receiver axis 42 in the projection, and the lower edge 48 cause diffraction patterns that widen the illumination area 56 in the direction of the receiver axis 42, for example over three receiving areas 40. This leads to crosstalk of the received light signals 32, for example, into the first and third reception areas 40 from above and thus to a loss of accuracy in the determination of the flea information from objects 18.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Optical Radar Systems And Details Thereof (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

L'invention concerne un dispositif de mesure optique pour la détermination d'informations d'objet pour des objets dans au moins une zone de surveillance, qui présente au moins un dispositif de réception pour la réception de signaux lumineux, lesquels viennent d'au moins un objet. L'au moins un dispositif de réception comprend au moins un récepteur électro-optique (34) pour la transformation de signaux lumineux en signaux électriques. Au moins un élément de diffraction de lumière (52) est disposé devant l'au moins un récepteur (34) dans un chemin lumineux de récepteur de l'au moins un dispositif de réception. L'au moins un récepteur (34) présente plusieurs zones de réception (40), lesquelles sont disposées les unes derrière les autres, vue dans la direction d'au moins un axe de récepteur (42), et qui peuvent être évaluées séparément quant à l'intensité lumineuse respectivement reçue. Au moins un bord de délimitation (54) d'au moins un élément de diffraction de lumière (52) s'étend, vu dans la projection vers l'au moins un récepteur (34), au moins partiellement non perpendiculairement à l'au moins un axe de récepteur (42).
EP20736613.9A 2019-07-04 2020-06-30 Dispositif de mesure optique pour la détermination d'informations d'objet pour des objets dans au moins une zone de surveillance Pending EP3994482A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019118029.5A DE102019118029A1 (de) 2019-07-04 2019-07-04 Optische Messvorrichtung zur Bestimmung von Objektinformationen von Objekten in wenigstens einem Überwachungsbereich
PCT/EP2020/068336 WO2021001339A1 (fr) 2019-07-04 2020-06-30 Dispositif de mesure optique pour la détermination d'informations d'objet pour des objets dans au moins une zone de surveillance

Publications (1)

Publication Number Publication Date
EP3994482A1 true EP3994482A1 (fr) 2022-05-11

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Application Number Title Priority Date Filing Date
EP20736613.9A Pending EP3994482A1 (fr) 2019-07-04 2020-06-30 Dispositif de mesure optique pour la détermination d'informations d'objet pour des objets dans au moins une zone de surveillance

Country Status (7)

Country Link
US (1) US20220357457A1 (fr)
EP (1) EP3994482A1 (fr)
JP (1) JP2022538462A (fr)
KR (1) KR20220016269A (fr)
CN (1) CN114174863A (fr)
DE (1) DE102019118029A1 (fr)
WO (1) WO2021001339A1 (fr)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3145871B2 (ja) * 1994-07-12 2001-03-12 日産ディーゼル工業株式会社 車両のレーザレーダ装置
JPH10281761A (ja) * 1997-04-02 1998-10-23 Fuji Electric Co Ltd 測距装置
DE19963003A1 (de) * 1999-12-24 2001-06-28 Bosch Gmbh Robert Kraftfahrzeug-Radarsystem
DE10244641A1 (de) * 2002-09-25 2004-04-08 Ibeo Automobile Sensor Gmbh Optoelektronische Erfassungseinrichtung
DE102011107585A1 (de) 2011-07-16 2013-01-17 Valeo Schalter Und Sensoren Gmbh Optische Messvorrichtung für ein Fahrzeug, Fahrerassistenzeinrichtung mit einer derartigen Messvorrichtung sowie Fahrzeug mit einer entsprechenden Messvorrichtung
CN107076852B (zh) * 2014-11-03 2021-02-05 伊利诺斯工具制品有限公司 用于车辆传感器系统的透射式正面加热器
KR20160063584A (ko) * 2014-11-27 2016-06-07 한국전자통신연구원 회절무늬 제거를 위해 엣지 가공된 개구를 갖는 이미지 디텍터의 이미지 검출 방법
EP3340601B1 (fr) * 2015-08-17 2019-12-18 LG Innotek Co., Ltd. Module de caméra
US10209709B2 (en) * 2016-08-15 2019-02-19 Ford Global Technologies, Llc LIDAR sensor frost detection
US10502830B2 (en) * 2016-10-13 2019-12-10 Waymo Llc Limitation of noise on light detectors using an aperture

Also Published As

Publication number Publication date
CN114174863A (zh) 2022-03-11
US20220357457A1 (en) 2022-11-10
KR20220016269A (ko) 2022-02-08
WO2021001339A1 (fr) 2021-01-07
JP2022538462A (ja) 2022-09-02
DE102019118029A1 (de) 2021-01-07

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