WO2020182802A1 - Système de mesure optique pour détecter des objets et procédé pour faire fonctionner un système de mesure optique - Google Patents

Système de mesure optique pour détecter des objets et procédé pour faire fonctionner un système de mesure optique Download PDF

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Publication number
WO2020182802A1
WO2020182802A1 PCT/EP2020/056330 EP2020056330W WO2020182802A1 WO 2020182802 A1 WO2020182802 A1 WO 2020182802A1 EP 2020056330 W EP2020056330 W EP 2020056330W WO 2020182802 A1 WO2020182802 A1 WO 2020182802A1
Authority
WO
WIPO (PCT)
Prior art keywords
light signal
signal transfer
light
measuring system
transfer area
Prior art date
Application number
PCT/EP2020/056330
Other languages
German (de)
English (en)
Inventor
Ho-Hoai-Duc Nguyen
Thomas Schuler
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 WO2020182802A1 publication Critical patent/WO2020182802A1/fr

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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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
    • G01S17/06—Systems determining position data of a target
    • G01S17/42—Simultaneous measurement of distance and other co-ordinates
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/88—Lidar systems specially adapted for specific applications
    • G01S17/93—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

Definitions

  • Optical measuring system for detecting objects and methods for operating an optical measuring system
  • the invention relates to an optical measuring system for detecting objects in a surveillance area
  • At least one light signal transfer body which has at least one light signal transfer area for transferring light signals between the measuring system and the monitoring area
  • At least one drive device with which the at least one light signal transfer body can be driven in such a way that at least one light signal transfer area can be moved to adjust to the direction of the light signals.
  • the invention also relates to a method for operating an optical measuring system for detecting objects in a monitoring area
  • At least one light signal transfer body is passed to at least one light signal device of the measuring system between the measuring system and the monitoring area,
  • the at least one light signal transfer body is driven with at least one drive device so that the at least one light signal transfer area is moved to adjust to the direction of the light signals.
  • An optical object detection device for a motor vehicle is known from WO 2014/095105 A1, with a transmitting unit for emitting a transmitted light beam, with a receiving unit for receiving a received light beam and with an electronic evaluation device for detecting an object external to the vehicle in the surroundings of the motor vehicle as a function of the receiving beam .
  • the send input unit has a transmitter for generating the transmission light beam, a controllable micro-oscillating mirror with which the transmission light beam can be pivoted at least in one pivot direction, and a transmission lens arranged in the transmission beam path behind the micro-oscillating mirror.
  • the invention is based on the object of designing a measuring system and a method of the type mentioned above, with which light signals can be transferred between the measuring system and the monitoring area better, in particular more easily, more reliably and / or more safely.
  • this object is achieved in the measuring system in that at least one light signal transfer area can be displaced along at least one at least partially curved displacement path.
  • a displacement path along which at least one light signal transfer body and thus at least one light signal transfer area is displaced has at least one curvature.
  • the direction of the at least one light signal transfer area is changed.
  • the at least one light signal transfer area is adjusted to the direction of the light signals.
  • the light signal transfer body is designed to send light signals
  • the direction of transmission of the light signals is changed by moving the at least one light signal transfer body along the curvature of the displacement path.
  • the light signal transfer body is designed to receive the light signals, the receiving direction for light signals is changed by moving the at least one light signal transfer body along the curvature of the displacement path.
  • a corresponding monitoring area of the measuring system can be flexibly and specifically be groped.
  • the monitoring area is defined by the field of vision of the measuring system.
  • the field of view of the measuring system can be individually adapted by designing the displacement path accordingly.
  • the viewing area can be defined by the range of motion of the at least one light signal transfer area along the displacement path. Additionally or alternatively, the field of view can be specified by the beam divergence of the transmitter light signals.
  • a resolution of the measuring system can be specified by the beam divergence of the transmitter light signals, additionally or alternatively, the resolution of the measuring system can be specified by a resolution during the shift, in particular a step size.
  • the curvature of the at least one displacement path makes it possible to reduce the demands on the mobility and / or the type of movement of the at least one light signal transfer body overall.
  • a service life of the light signal deflection device can be increased compared to light signal deflection devices with rotating or oscillating mirrors.
  • a light signal transfer area can be used to transfer light signals from the measuring system or a transmitting device or a corresponding optical system to the monitoring area.
  • a light signal transfer area can be used to transfer light signals from the monitoring area to the measuring system, or a receiving device or a speaking optical system.
  • At least one light signal can advantageously be implemented as a light pulse.
  • a start and an end of a light pulse can be determined, in particular measured. In this way, light transit times in particular can be measured.
  • At least one light signal can advantageously also contain further information.
  • a light signal can in particular be encoded. In this way it can be more easily identified and / or carry corresponding information with it.
  • the transmission device can advantageously have at least one light source.
  • pulsed light signals can be transmitted by the transmitting device.
  • At least one light source can advantageously have at least one laser.
  • the laser can advantageously be a semiconductor laser, in particular a surface emitter (VCSEL), an edge emitter, a fiber laser or the like.
  • VCSEL surface emitter
  • edge emitter a fiber laser or the like.
  • With the laser light signals can be emitted in frequency ranges that are visible or invisible to the human eye.
  • pulsed light signals can be emitted with a laser. The pulse length can be precisely specified.
  • At least one transmission device can advantageously have at least one optical system, in particular an optical lens or the like.
  • the generated light signals can be shaped, in particular a beam di vergence can be set.
  • the output of the optical system forms the corresponding light signal transfer body with the light signal transfer area of the transmitting device.
  • the at least one receiving device can have at least one receiver, in particular a special (avalanche) photodiode, a diode array, a CCD array or the like. With such receivers, light signals can be converted into electrical signals, in particular. Electrical signals can be processed with an electronic control and evaluation device of the measuring system.
  • At least one receiver can advantageously have at least one optical system, in particular an optical lens or a fisheye lens or the like. In this way, light signals that are reflected by at least one deflection area can be better directed onto the receiver.
  • the input of the optical system forms the corresponding light signal transfer body with the light signal transfer area of the receiving device.
  • the optical measuring system can advantageously be based on a time-of-flight method, in particular a light pulse transit time method work.
  • Optical measuring systems operating according to the light pulse travel 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 .
  • TOF time-of-flight
  • LiDAR light detection and ranging systems
  • LaDAR laser detection and ranging systems
  • a transit time from the transmission of a light signal with a transmitting device and the reception of the corresponding reflected light signal with a corresponding receiving device of the measuring system is measured and a distance between the measuring system and the detected object is determined from this.
  • the optical measuring system can advantageously be designed as a scanning system, in particular as a laser scanner.
  • a monitored area can be scanned, i.e. scanned, with light signals.
  • the light signals can be swiveled to a certain extent over the monitored area.
  • the shifting of the at least one light signal transfer area with the at least one drive device is used.
  • the optical measuring system can advantageously be used in a vehicle, in particular a motor vehicle.
  • the measuring system 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 measuring system can also be used in vehicles that can be operated autonomously or partially autonomously.
  • the measuring system can also be used in stationary operation.
  • the optical measuring system can be used to detect stationary or moving objects, in particular vehicles, people, animals, obstacles, uneven road surfaces, in particular potholes or stones, lane boundaries, open spaces, in particular parking spaces, or the like.
  • the optical measuring system can advantageously be part of a driver assistance system and / or a chassis control of a vehicle or be connected to them.
  • the information determined with the optical measuring system can be used to control functional components of the vehicle.
  • driving functions in particular, in particular steering, a braking system and / or a motor and / or signaling devices of the vehicle can be controlled.
  • the vehicle can be steered and / or its speed changed, in particular stopped, and / or at least one signal can be output.
  • At least one light signal transfer body can be implemented at an output of a transmitting device and / or at least one light signal transfer body can be implemented at an input of a receiving device and / or at least one light signal transfer body can be implemented on a light guide.
  • At least one light signal transfer body can be implemented at an output of a transmitting device.
  • the output of the transmission device can be implemented directly on a light source of the transmission device or indirectly on an optical system behind the light source.
  • At least the part of the at least one transmitter device, in particular the light source and / or the optical system, which has the respective light signal transfer area can advantageously be moved along the displacement path with the at least one drive device.
  • the direction of emission of the light signals at the light signal transfer area can be adapted to the curvature of the displacement path, so that overall the direction of emission is pivoted when moving.
  • An additional light signal deflecting device, in particular a mirror can be dispensed with.
  • At least one light signal transfer body can advantageously be implemented at an input of a receiving device.
  • the input of the receiving device can be implemented directly on a receiver of the receiving device or indirectly on an optical system in front of the receiver.
  • At least the part of the at least receiving device, in particular the receiver and / or the optical system, which has the respective light signal transfer area, can advantageously be shifted with the at least one drive device along the displacement path.
  • the receiving direction for receiving light signals can adapt to the curvature of the displacement path, so that overall the receiving direction is pivoted when moving.
  • a Additional light signal deflection device in particular a mirror, can be dispensed with.
  • At least light signal transfer bodies can advantageously be implemented on a light guide.
  • One end of the light guide can be connected directly or indirectly to a receiving device or a transmitting device.
  • the other, free end can form the respective light signal transfer body with the corresponding light signal transfer area.
  • the free end of the light guide and thus the light signal transfer area can be moved along the displacement path with the aid of the at least one drive device.
  • the receiving device or the transmitting device can be arranged separately from the light signal transfer area with respect to the space required and can be moved relative to this.
  • the transmitting device or the receiving device itself does not have to be moved.
  • the direction of the light signal transfer area of the light guide adapts to the direction of the curvature of the displacement path when moving, so that overall the receiving direction for receiving light signals or the sending direction for sending light signals when moving is pivoted.
  • An additional light signal deflection device in particular a special mirror, can be dispensed with.
  • At least one light signal transfer area can be implemented at a light output of a transmitting device and / or at least one light signal transfer area can be implemented at a light input of a receiving device and / or at least one light signal transfer area can be implemented at a light output of a light guide his and / or at least one light signal transfer area can be implemented at a light input of a light conductor.
  • a light signal transfer area of a transmitting device or a light guide light signals can be transferred to the monitoring area.
  • light signals from the monitoring area can be transferred to the measuring system with a light signal transfer area of a receiving device or a light guide.
  • a direction of the at least one light signal transfer area when moving the at least one light signal nal transfer body follow the curvature of the displacement path. In this way, the curvature of the displacement path can directly influence the direction of the at least one light signal transfer area.
  • At least one drive device can have or consist of at least one linear drive.
  • the at least one light signal transfer body and there with the at least one light signal transfer area can be moved along at least a line.
  • Linear drives can also be controlled easily and precisely.
  • a position of the at least one light signal transfer area can be determined precisely with the aid of encoders.
  • a measure of the direction in which the light signals are sent or from which the light signals are received can be determined from the position of the at least one light signal transfer area.
  • the at least one drive device can advantageously have at least two linear drives. In this way, the at least one light signal transfer area can be shifted along a surface.
  • At least one light signal transfer area can be shifted with at least two linear drives, in particular in directions orthogonal to one another.
  • At least one drive device can advantageously have at least one piezo motor. Piezo motors can be implemented with smaller sizes than electromagnetic motors with comparable performance.
  • At least one drive device can have at least one type of slide on which at least one light signal transfer body with at least one light signal transfer area can be attached. With the at least one slide or the like, at least the light signal transfer area can be moved along the displacement path.
  • At least one transmitting device and / or at least one receiving device and / or at least one end of at least one light guide can be fastened to at least one carriage of at least one drive device.
  • several light signal transfer areas can also be moved along the displacement path with a single slide.
  • At least one displacement path of at least one light signal transfer area can be curved at least partially concave and / or at least partially convex. In this way, a corresponding decorationssein setting can be specified as required.
  • the at least one displacement path can be curved in an exclusively concave or convex manner.
  • At least part of the at least one displacement path can be curved in a concave manner and at least part of the displacement path can be convexly curved. In this way, appropriate patterns for setting the direction of the light signals can be specified.
  • At least one displacement path of at least one light signal transfer area can be curved at least partially parabolically and / or at least partially conically and / or at least partially elliptically and / or at least partially circularly. In this way, individual patterns can be implemented for setting the direction of the light signals.
  • the displacement path of at least one light signal transfer area can advantageously be exclusively parabolic or exclusively conical or exclusively elliptical or exclusively circular.
  • the displacement path of at least one light signal transfer area can have combinations of the aforementioned or other curvatures.
  • Transfer area be freely shaped.
  • An individual pattern for setting the direction of the light signals can thus be implemented with the displacement path.
  • At least one displacement path can be curved at least partially in one dimension and / or at least one displacement path can be at least partially curved in two dimensions.
  • Transfer area be at least partially curved in one dimension. In this way, the direction of the light signals can be swiveled in one dimension. The monitoring area can thus be scanned in one dimension. A curvature in one dimension can be realized more easily than a curvature in two dimensions.
  • a displacement path of at least one light signal transfer area can advantageously be curved at least partially in two dimensions, in particular cylindrical, spherical, ellipsoidal or the like. In this way, the direction of the light signals can be swiveled in two dimensions. The monitoring area can thus be scanned in two dimensions.
  • a displacement path of at least one light signal transfer area can have areas in which the displacement path is curved in one dimension and areas in which the displacement path is curved in two dimensions.
  • a pattern for setting the direction of the light signals can be specified more individually
  • At least one light signal transfer area can be periodically displaceable along the at least one displacement path.
  • the direction of the at least one light signal transfer area can be adjusted periodically to the direction of the light signals.
  • the monitored area can be scanned with light signals by the corresponding periodic displacement of the at least one light signal transfer area.
  • the at least one light signal transfer area can advantageously be displaced in a harmoniously oscillating manner. In this way, a sinusoidal course of the setting in the direction of the light signals can be realized. The corresponding deflection of the direction of the at least one light signal transfer area from a zero position can thus be determined more easily.
  • the object is achieved according to the invention in the method in that at least one light signal transfer area is shifted along at least one at least partially curved displacement path so that the direction of the at least one light signal transfer area is set to the direction of the light signals.
  • the at least one light signal transfer area is shifted along at least one displacement path.
  • the direction of the at least one light signal transfer area is adjusted to the direction of the light signals depending on the curvature of the displacement path.
  • FIG. 1 is a front view of a passenger car with a driver assistance system and an optical measuring system for monitoring a Monitoring area in the direction of travel in front of the passenger car;
  • FIG. 2 shows a functional illustration of the passenger car from FIG. 1 with the driver assistance system and the measuring system;
  • FIG. 3 shows a detailed view of a light signal device and a drive device of the measuring system from FIGS. 1 and 2 with a transmitting device, a receiving device and a drive device according to a first exemplary embodiment
  • FIG. 4 shows a detailed view of a light signal device and a drive device of the measuring system from FIGS. 1 and 2 according to a second exemplary embodiment
  • FIG. 5 shows a detailed view of a light signal device and a drive device of the measuring system from FIGS. 1 and 2 according to a third exemplary embodiment
  • FIG. 6 shows a detailed view of a light signal device and a drive device of the measuring system from FIGS. 1 and 2 according to a fourth exemplary embodiment
  • FIG. 7 shows a detailed view of a light signal device and a drive device of the measuring system from FIGS. 1 and 2 according to a fifth exemplary embodiment
  • FIG. 8 shows a detailed view of a light signal device and a drive device of the measuring system from FIGS. 1 and 2 according to a sixth exemplary embodiment.
  • a vehicle 10 is shown in the form of a passenger car in a front view.
  • the vehicle 10 has an optical measuring system 12, which is arranged, for example, in the front bumper of the vehicle 10.
  • a monitoring area 14 which is indicated in FIG. 2
  • the monitoring area 14 can be scanned, that is to say scanned, with the optical measuring system 12.
  • the optical measuring system 12 can also be arranged in one place instead of the vehicle 10 and directed in a different direction.
  • a plurality of optical measuring systems 12 can also be provided on the vehicle 10.
  • the objects 18 can be stationary or moving objects, for example other vehicles, people, animals, obstacles, uneven road surfaces, potholes or stones, road boundaries, open spaces, parking spaces or the like.
  • the vehicle 10 also has a driver assistance system 20 with which driving functions, for example steering functions, braking functions and / or engine functions of the vehicle 10 can be at least partially controlled or a driver can be supported. Furthermore, information can be output to the driver with the driver assistance system 20. With the aid of the driver assistance system 20, the vehicle 10 can be operated autonomously or partially autonomously.
  • driving functions for example steering functions, braking functions and / or engine functions of the vehicle 10 can be at least partially controlled or a driver can be supported.
  • information can be output to the driver with the driver assistance system 20.
  • the vehicle 10 With the aid of the driver assistance system 20, the vehicle 10 can be operated autonomously or partially autonomously.
  • the measuring system 12 is connected to the driver assistance system 20 in terms of signals. In this way, information obtained with the measuring system 12, for example about objects 18 in the monitoring area 14, can be transmitted to the driver assistance system 20.
  • the optical measuring system 12 is designed, for example, as a laser scanner. With the optical measuring system 12, transmitter light signals 22 are sent into the monitoring area 14, for example in the form of laser pulses. The direction of the transmitter light signals 22 in the monitoring area 14 is varied so that the monitoring area 14 can be scanned as a whole. The direction of the transmitter light signals 22 is indicated by the direction of the arrow shown in the figure.
  • the measuring system 12 can be used to determine distances, directions and speeds of detected objects 18 relative to the vehicle 10.
  • the measuring system 12 comprises a light signal device 24, a drive device 26 and an electronic control and evaluation device 28.
  • the light signal device 24 and the drive device 26 according to a first embodiment are shown in detail in FIG.
  • the light signal device 24 comprises a transmitting device 30 for emitting the transmitter light signals 22 and a receiving device 32 for receiving transmitter light signals 22, which are reflected as received light signals 34 on an object 18 possibly present in the monitoring area 14.
  • the direction of the received light signals 34 is indicated by the direction of the arrow shown in the figure.
  • the transmitter device 30 has a laser, for example a diode laser, with which the transmitter light signals 22 can be generated and transmitted.
  • the transmission device 30 comprises an optical system, for example with an optical lens, with which the transmitter light signals 22 are expanded in one direction, for example.
  • a light output of the optical system forms a light signal transfer body 36s on the transmitter side.
  • the transmitter-side light signal transfer body 36s has a transmitter-side light signal transfer area 38s for transferring the transmitter light signals 22 from the measuring system 12 to the monitoring area 14.
  • the transmission device 30 is technically connected to the control and evaluation device 28.
  • the receiving device 32 has a receiver with which the received light signals 34 can be converted into electrical signals, for example, which can be used with the control and evaluation device 28.
  • the receiver can for example have at least one (avalanche) photodiode, at least one diode array and / or at least one CCD array or the like.
  • the receiving device 32 has an optical system, for example with an optical lens, in particular a fish eye, with which the received light signals 34 can be focused on the receiver.
  • a light input of the optical system forms a light signal transfer body 36e on the receiver side.
  • the receiver-side light signal transfer body 36e has a receiver-side light signal transfer area 38e for transferring the received light signals 34 from the monitoring area to the measuring system 12.
  • the receiving device 32 is connected to the control and evaluation device 28 for signaling purposes. In this way, the receiving device 32 can be controlled with the control and evaluation device 28. In addition, the signals of the receiving device 32 can be transmitted to the control and evaluation device 28 in this way.
  • the drive device 26 includes, for example, a slide 40.
  • the drive device 26 also includes, for example, a linear piezo motor 42 with which the slide 40 can be displaced along a curved displacement path 44.
  • the displacement path 44 is specified, for example, by a corresponding rail 46.
  • the displacement path 44 follows an elliptically curved line, for example.
  • the displacement path 44 is convex when viewed from the monitoring area 14.
  • the transmitting device 30 and the receiving device 32 and thus the transmitter-side light signal transfer body 36s with the transmitter-side light signal transfer area 38s and the receiver-side light signal transfer body 36e with the receiver-side light signal transfer area 38e are attached .
  • the light signal transfer area 38s on the transmitter side and the light signal transfer area 38e on the receiver side are directed into the monitoring area 14.
  • the transmitting device 30 and the receiving device 32 and thus the transmitter-side light signal transfer body 36s with the sensor-side light signal transfer area 38s and the receiver-side light signal transfer body 36e with the receiver-side light signal transfer area 38e can be moved along the curved displacement path 44 become.
  • the light signal transfer area 38s on the transmitter side can be set to the direction in which the transmitter light signals 22 are to be sent.
  • the receiver-side light signal transfer area 38e can be set to the direction from which the received light signals 34 come.
  • the transmitting device 30 and the receiving device 32 and thus the transmitter-side light signal transfer body 36s with the transmitter-side light signal transfer area 38s and the receiver-side light signal transfer body 36e with the receiver-side light signal transfer area 38e can periodically back and forth along the displacement path 44, for example in harmonic oscillation be pushed forward, which is indicated by a double arrow.
  • the transmitter 30 and the receiver 32 and thus the transmitter-side light signal transfer body 36s with the transmitter-side light signal transfer area 38s and the receiver-side light signal transfer body 36e with the receiver-side light signal transfer area 38e in their zero position I are shown with continuous lines.
  • the transmitting device 30 and the receiving device 32 and thus the transmitter-side light signal transfer body 36s with the transmitter-side light signal transfer area 38s and the receiver-side light signal transfer body 36e with the receiver-side light signal transfer area 38 are dashed in FIG. 3 in an exemplary deflection position II shown.
  • Transfer area 38e of the curvature of the displacement path 44 By moving along the displacement path 44, the direction of the transmitter-side light signal transfer area 38s and the direction of the receiver-side light signal
  • Transfer area 38e changed in one dimension.
  • the direction of the transmitter light signals 22 are directed and the direction from which the received light signals 34 are received is changed.
  • the monitoring area 14 is thus scanned in one dimension with the transmitter light signals 22.
  • the boundaries 48 of the monitoring area 14 are indicated in FIG. 3 by dashed lines.
  • the monitoring area 14 is predetermined by the range of motion of the carriage 40, or the light signal transfer area 38s on the transmitter side and the light signal transfer area 38e on the receiver side, and the beam divergence of the transmitter light signals 22.
  • the resolution of the measuring system 12 is predetermined by the beam divergence of the transmitter light signals 22 and the step size of the piezo motor 42, resp.
  • the drive device 26 also has a position detection device, which is of no further interest here, with which the current deflection of the transmitter device 30 and the receiver device 32 and thus the transmitter-side light signal transfer body 36s with the transmitter-side light signal transfer area 38s and the receiver-side light signal transfer body 36e with the light signal transfer area 38e on the receiver side can be detected.
  • the drive device 26 and the position detection device are signal-connected to the control and evaluation device 28.
  • the drive device 36 can be controlled or regulated with the control and evaluation device 28.
  • the current deflection can be transmitted to the control and evaluation device 28 and processed therewith.
  • control and evaluation device 28 With the control and evaluation device 28, the measuring system 12 can be controlled as a whole.
  • the control and evaluation device 28 is implemented using hardware and software technology.
  • the elements of the control and evaluation device 28 can be implemented as a unit, for example in a common housing. As an alternative, some of the elements or all elements of the control and evaluation device 28 can be implemented separately from one another.
  • FIG. 4 shows a light signal device 24 with a drive device 26 according to a second exemplary embodiment.
  • the second exemplary embodiment differs from the first exemplary embodiment in that only the transmitter device 30 with the transmitter-side light signal transfer body 36s and the transmitter-side light signal transfer area 38s is provided on the slide 40.
  • the receiving device of the measuring system 12, not shown in FIG. 4, is implemented in a different manner in the second exemplary embodiment.
  • FIG. 5 shows a light signal device 24 with a drive device 26 according to a third exemplary embodiment.
  • Those elements which are similar to those of the first exemplary embodiment from FIG. 3 are given the same reference numerals. provided.
  • the third exemplary embodiment differs from the first exemplary embodiment in that the transmitting device 30 and the receiving device 32 are not arranged on the carriage 40 but rather separately from the drive device 26.
  • the transmitter device 30 is connected to an input of a transmitter light guide 50s.
  • An output of the transmitter light guide 50s at its free end is attached to the carriage 40 and forms a transmitter-side light signal transfer body 36s.
  • the side of the transmitter-side light signal transfer body 36s facing the monitoring area 14 forms the transmitter-side light signal transfer area 38s.
  • the receiving device 32 is connected to an output of a receiving light guide 50e.
  • An input of the receiving light guide 50e at its free end is attached to the carriage 40 and forms a light signal transfer body 36e on the receiver side.
  • the side of the receiver-side light signal transfer body 36e facing the monitoring area 14 forms the receiver-side light signal transfer area 38e.
  • the transmitter-side light signal transfer area 38s and the receiver-side light signal transfer area 38e can be shifted along the displacement path 44 without the transmitter 30 and the receiver 32 having to be moved.
  • FIG. 6 shows a light signal device 24 with a drive device 26 according to a fourth exemplary embodiment.
  • the fourth exemplary embodiment differs from the third exemplary embodiment in that only the free end of the sensor-side transmitter light guide 50s with the transmitter-side light signal transfer body 36s and the transmitter-side light signal transfer area 38s is attached to the slide 40.
  • the receiver-side light signal transfer body (not shown in FIG. 6) with the receiver-side light signal transfer area is realized in a different way in the fourth embodiment.
  • a light signal device 24 is shown with a drive device 26 according to a fifth embodiment. Those elements which are similar to those of the first exemplary embodiment from FIG. 3 are given the same reference numerals.
  • the fifth exemplary embodiment differs from the first exemplary embodiment in that the displacement path 44 is concavely curved when viewed from the monitoring area 14.
  • FIG. 8 shows a light signal device 24 with a drive device 26 according to a sixth exemplary embodiment.
  • the sixth embodiment differs from the first embodiment in that the displacement path 144 of the transmitter 30 and the receiver 32 and thus the transmitter-side light signal transfer body 36s with the transmitter-side light signal transfer area 38s and the receiver-side light signal transfer body 36e with the receiver-side light signal -The transfer area 38e is curved in two dimensions.
  • the displacement path 144 is implemented, for example, with a two-dimensionally curved path 146.
  • the transmitting device 30 and the receiving device 32 and thus the transmitter-side light signal transfer body 36s with the transmitter-side light signal transfer area 38s and the receiver-side light signal transfer body 36e with the receiver-side light signal transfer area 38e with the corresponding drive device 36 along the displacement path 38 be moved in two dimensions.
  • the monitoring area 14 can thus be scanned in two dimensions.

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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)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

L'invention concerne un système de mesure optique (12) destiné à détecter des objets (18) dans une zone de surveillance (14), et un procédé pour faire fonctionner un système de mesure optique (12). Le système de mesure optique (12) dispose d'au moins un dispositif à signal lumineux (24). Ledit dispositif à signal lumineux (24) comporte au moins un dispositif émetteur (30) permettant de générer des signaux lumineux (22), au moins un dispositif récepteur (32) permettant de recevoir des signaux lumineux (34), et au moins un corps de transfert de signaux lumineux (36s, 36e), lequel possède au moins une zone de transfert de signaux lumineux (38s, 38e) servant au transfert de signaux lumineux (22, 34) entre le système de mesure (12) et la zone de surveillance (14). Le système de mesure optique (12) dispose en outre d'au moins un dispositif d'entraînement (26) permettant d'entraîner ledit corps de transfert de signaux lumineux (36s, 36e) de telle sorte qu'au moins une zone de transfert de signaux lumineux (38s, 38e) peut être déplacée pour un réglage en fonction de la direction des signaux lumineux (22, 34). Au moins une zone de transfert de signaux lumineux (38s, 38e) peut être déplacée le long d'au moins une trajectoire de déplacement (44 ; 144) au moins partiellement courbe.
PCT/EP2020/056330 2019-03-12 2020-03-10 Système de mesure optique pour détecter des objets et procédé pour faire fonctionner un système de mesure optique WO2020182802A1 (fr)

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DE102019106265.9 2019-03-12
DE102019106265.9A DE102019106265A1 (de) 2019-03-12 2019-03-12 Optisches Messsystem zur Erfassung von Objekten und Verfahren zum Betreiben eines optischen Messsystems

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014095105A1 (fr) 2012-12-21 2014-06-26 Valeo Schalter Und Sensoren Gmbh Système optique de détection d'objets à mems et véhicule à moteur équipé d'un tel système de détection
DE102014005350A1 (de) * 2014-04-10 2015-10-15 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Hallstadt Optischer Hinderniserkennungs-Sensor für ein Fahrzeug
DE102016101134A1 (de) * 2016-01-22 2017-07-27 Valeo Schalter Und Sensoren Gmbh Optische Messvorrichtung eines Fahrzeugs, Fahrerassistenzeinrichtung und Fahrzeug mit wenigstens einer optischen Messvorrichtung
DE102016010985A1 (de) * 2016-09-10 2018-03-15 Blickfeld GmbH Laser-scanner zur abstandsmessung bei kraftfahrzeugen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014095105A1 (fr) 2012-12-21 2014-06-26 Valeo Schalter Und Sensoren Gmbh Système optique de détection d'objets à mems et véhicule à moteur équipé d'un tel système de détection
DE102014005350A1 (de) * 2014-04-10 2015-10-15 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Hallstadt Optischer Hinderniserkennungs-Sensor für ein Fahrzeug
DE102016101134A1 (de) * 2016-01-22 2017-07-27 Valeo Schalter Und Sensoren Gmbh Optische Messvorrichtung eines Fahrzeugs, Fahrerassistenzeinrichtung und Fahrzeug mit wenigstens einer optischen Messvorrichtung
DE102016010985A1 (de) * 2016-09-10 2018-03-15 Blickfeld GmbH Laser-scanner zur abstandsmessung bei kraftfahrzeugen

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