WO2020158487A1 - Dispositif d'inspection de détecteur de télémétrie - Google Patents

Dispositif d'inspection de détecteur de télémétrie Download PDF

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Publication number
WO2020158487A1
WO2020158487A1 PCT/JP2020/001754 JP2020001754W WO2020158487A1 WO 2020158487 A1 WO2020158487 A1 WO 2020158487A1 JP 2020001754 W JP2020001754 W JP 2020001754W WO 2020158487 A1 WO2020158487 A1 WO 2020158487A1
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WO
WIPO (PCT)
Prior art keywords
light
optical fiber
unit
distance measuring
inspection device
Prior art date
Application number
PCT/JP2020/001754
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English (en)
Japanese (ja)
Inventor
サムエル ボーマン
Original Assignee
株式会社ジェイメック
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Filing date
Publication date
Application filed by 株式会社ジェイメック filed Critical 株式会社ジェイメック
Publication of WO2020158487A1 publication Critical patent/WO2020158487A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/497—Means for monitoring or calibrating
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/42—Coupling light guides with opto-electronic elements

Definitions

  • the present disclosure relates to a distance measurement detector inspection device that inspects a distance measurement detector.
  • the lidar includes a light emitting unit that emits light such as laser light and a light receiving unit that receives the light.
  • the lidar emits light from the light emitting portion, and the light receiving portion receives the reflected light that is reflected by the object to be measured.
  • the lidar detects the distance to the object to be measured based on the propagation time of the pulsed light from the emission of the light from the light emitting unit to the reception of the reflected light by the light receiving unit and the phase difference of the light.
  • the wavelength (frequency) of the light emitting unit is scanned and the distance is detected from the beat signal generated by the frequency difference between the emitted light and the reflected light.
  • the object In order to check whether the lidar is functioning normally, the object is actually placed at a position distant from the lidar, and the distance and angle between the lidar and the object to be measured can be changed. Since it is necessary to detect the reflected light from the target object, there is a problem that it is necessary to secure the site area and it takes time and labor.
  • the present disclosure has been made in view of the above problems, and an object of the present disclosure is to provide a distance measurement detector inspection device that can easily inspect a lidar on a desktop.
  • a lidar inspection device is a lidar inspection device that inspects a lidar that includes a light emitting unit that emits light and a light receiving unit that receives the light.
  • An intervening region and a light blocking plate that optically shields the region between the emitting unit and the light receiving unit from each other are provided.
  • FIG. 1 is a perspective view schematically showing a lidar inspection device according to an embodiment of the present disclosure. It is a perspective side view which shows typically the lidar inspection device concerning one embodiment of this indication.
  • FIG. 3 is a side view schematically showing a rider according to an embodiment of the present disclosure. It is a figure showing a lidar inspection device in a state where a lidar mounting member rotated. It is a perspective view which shows the connection part seen from above typically. It is a perspective view which shows the connection part seen from the bottom typically. It is a front view which shows a connection part typically. It is a figure which shows the structure of an optical fiber part typically.
  • FIG. 1 is a perspective view schematically showing a lidar inspection device according to an embodiment of the present disclosure
  • FIG. 2 is a perspective side view schematically showing the lidar inspection device shown in FIG. 1.
  • the lidar inspection apparatus 100 shown in FIGS. 1 and 2 includes a lidar mounting member 1, a rotary stage 2, an incident portion 3, an optical fiber portion 4, an emitting portion 5, light shielding plates 6 and 7, and a light shielding member 8. And a connecting portion 9.
  • the rider mounting member 1 is a member to which the rider 10, which is a detector for detecting a distance, can be attached and detached.
  • the method of mounting the rider 10 on the rider mounting member 1 is not particularly limited. 1 and 2 show the rider inspection apparatus 100 in a state where the rider 10 is mounted on the rider mounting member 1.
  • FIG. 3 is a perspective view schematically showing the rider 10.
  • the lidar 10 includes a light emitting unit 11 that emits light such as laser light and a light receiving unit 12 that receives the light.
  • the light emitting unit 11 and the light receiving unit 12 are provided at different locations on the same surface of the lidar 10.
  • the rider 10 is mounted on the rider mounting member 1 so that the positions of the light emitting unit 11 and the light receiving unit 12 in a predetermined direction are different from each other.
  • the predetermined direction is the Z direction, which is the height direction.
  • the rider mounting member 1 is configured to be mounted on the rider 10 such that the light emitting unit 11 is arranged at a higher position than the light receiving unit 12, but the light receiving unit 12 is mounted on the light emitting unit 11 more than the light emitting unit 11.
  • the lidar 10 may be mounted so as to be placed at a higher position, or the lidar 10 may be mounted so that the light emitting unit 11 and the light receiving unit 12 have the same height.
  • the rotary stage 2 rotatably supports the rider mounting member 1.
  • the rotary stage 2 rotates about the Z direction, which is a predetermined direction, as an axis.
  • the incident part 3 receives light from the light emitting part 11 of the lidar 10 mounted on the lidar mounting member 1, and guides the received light to the optical fiber part 4.
  • the optical fiber unit 4 has optical fibers (see FIG. 8) having different lengths for propagating the light introduced from the incident unit 3.
  • the emitting unit 5 emits the light propagated through the optical fiber of the optical fiber unit 4 toward the light receiving unit 12 of the rider 10 mounted on the rider mounting member 1.
  • the entrance portion 3 and the exit portion 5 are provided facing the rider mounting member 1 side at positions separated from the rider mounting member 1 in the X direction intersecting with the Z direction (more specifically, substantially orthogonal). Further, the incident part 3 and the emitting part 5 are provided so that their positions in the Z direction are different from each other.
  • the positional relationship between the incident part 3 and the emitting part 5 in the Z direction is determined according to the positional relationship between the light emitting part 11 and the light receiving part 12 in the Z direction.
  • the entrance section 3 is provided higher than the exit section 5.
  • the entrance unit 3 and the exit unit 5 are provided so that their positions in the Y direction are different.
  • the light-shielding plates 6 and 7 are a first region 21 which is a region between the light emitting unit 11 of the rider 10 mounted on the rider mounting member 1 and the incident unit 3 and the rider 10 mounted on the rider mounting member 1.
  • the light-shielding plates 6 and 7 are provided along an XY plane that intersects with the Z direction (more specifically, substantially orthogonally), and from between the light emitting unit 11 and the light receiving unit 12 in the Z direction, It extends to between the incident part 3 and the emission part 5 in the Z direction.
  • the light shield 6 is composed of light shields 61 and 62.
  • the light blocking plates 61 and 62 are first light blocking plates that are connected to the rotary stage 2 via a support portion 91, which will be described later, and can rotate together with the rider mounting member 1 as the rotary stage 2 rotates.
  • FIG. 4 is a diagram showing an example of the rider inspection device 100 in a state where the rider mounting member 1 and the light shielding plate 6 are rotated.
  • the light-shielding plate 7 is a second light-shielding plate provided closer to the incident section 3 and the emission section 5 than the light-shielding board 61. A part of the light shielding plate 7 overlaps with the light shielding plate 6 when viewed from the Z direction.
  • the light blocking plate 7 is provided at a position lower than the light blocking plate 61.
  • the light shield plate 6 Since the light shield plate 6 is rotatable, there is a slight gap between the light shield plate 61 and the light shield plate 7, and the light emitted from the light emitting unit 11 of the lidar 10 can pass through the gap due to the reflector near the incident unit 3.
  • the light-shielding plate 62 is provided because of its property.
  • a shading plate 62 is attached at a position lower than the shading plate 7, and an opening formed by a slit 93 for introducing the light emitted from the emitting unit 5 to the light receiving unit 12 of the lidar 10 is further provided below the light shielding plate 62.
  • the light shielding member 8 is provided so that the light emitted from the light emitting unit 11 is not introduced into the detector due to scattering by the surrounding environment. Further, it supports the incident part 3, the emitting part 5, and the light shielding plate 7.
  • the light shielding members 8 are provided on both sides of the rider mounting member 1 and include side wall portions extending in the X direction, and the light shielding plate 7 is supported by each side wall portion. Further, the light shielding member 8 has a wall portion provided at a position facing the rider mounting member 1 in the X direction, and the incident portion 3 and the emission portion 5 are attached to the wall portion.
  • the connecting portion 9 is a light blocking member for connecting the light blocking plate 6 to the rotary stage 2 and the rider 10.
  • FIG. 5 to 7 are diagrams schematically showing the connecting portion 9. Specifically, FIG. 5 is a perspective view of the connecting portion 9 viewed from above, FIG. 6 is a perspective view of the connecting portion 9 viewed from below, and FIG. 7 is a front view of the connecting portion 9. is there.
  • the connection portion 9 shown in FIGS. 5 to 7 includes a support portion 91 that supports the light shielding plate 6, and a light shielding structure 92 provided on the light shielding plate 6.
  • the support portion 91 is attached to the rotary stage 2 and connects the light shielding plate 6 to the rotary stage 2.
  • the support portion 91 may be attached to the rotary stage 2 via the rider mounting member 1, or may be directly attached to the rotary stage 2 without the rider mounting member 1.
  • the light blocking structure 92 covers the light receiving section 12 of the rider 10 on which the rider mounting member 1 is mounted, thereby optically blocking the light receiving section 12 from the outside.
  • the light shielding structure 92 has a slit 93 formed on the emitting portion 5 side.
  • the slit 93 is an opening that takes in the light from the emission unit 5 into the light shielding structure 92.
  • the slit 93 is provided at a position lower than the light shielding plates 6 and 7.
  • the opening is not limited to the slit 93 and may have another shape.
  • the light-shielding plates 6 and 7, the light-shielding member 8, and the connecting portion 9 are made of a stray light removing material for the purpose of blocking light and preventing irregular reflection in order to suppress light reflection.
  • a plate material having a matt black alumite treatment is used as these members, but a micro cavity formed by an ion beam or the like may be used.
  • FIG. 8 is a diagram schematically showing a more detailed configuration of the optical fiber unit 4.
  • the optical fiber unit 4 shown in FIG. 8 has an input terminal 41, a plurality of optical fibers 42, optical switches 43 to 46, and an output terminal 47.
  • the input terminal 41 is optically connected to the incident section 3, and light is introduced from the incident section 3.
  • the input terminal 41 is, for example, an optical connector such as an FC connector or an SC connector.
  • the plurality of optical fibers 42 have different lengths.
  • the optical fiber 42 is divided into a plurality of optical fiber groups 51 and 52 provided in multiple stages. Although the number of optical fibers is two in the example of the drawing, it may be one or three or more. Further, in the example of the drawing, the optical fiber groups 51 and 52 each have eight optical fibers 42 from A to H, but the number of the optical fibers 42 included in the optical fiber groups 51 and 52 is particularly large. Not limited. For example, the number of optical fibers 42 included in the optical fiber groups 51 and 52 may be different from each other.
  • the optical fiber 42 may be a multimode fiber, a single mode fiber, or a mixture thereof.
  • the multimode fiber When connecting the incident part 3 to a multimode fiber, the multimode fiber has a larger fiber core diameter than the single mode fiber, and therefore a large amount of light can be obtained depending on the cross-sectional area of the core.
  • an optical element such as an ND filter for suppressing the amount of light may be arranged between the incident section 3 and the light emitting section 11.
  • the single-mode fiber when connecting the incident part 3 to a single-mode fiber, the single-mode fiber has a smaller fiber core diameter than the multi-mode fiber, so there is a possibility that only a small amount of light can be obtained.
  • an optical element such as a lens or a tapered optical fiber for taking in a large amount of light may be arranged in front of the incident section 3.
  • the optical switches 43 to 46 switch the optical paths for the light introduced into the input terminal 41 to propagate to the optical fiber 42.
  • the optical switch 43 is provided in the preceding stage of the optical fiber group 51, and propagates the light guided to the input terminal 41 to any one of the optical fibers 42 included in the optical fiber group 51.
  • the optical switches 44 and 45 are provided before the optical fiber group 52.
  • the optical switch 44 propagates the light from the optical fiber 42 included in the optical fiber group 51 to the optical switch 45, and the optical switch 45 determines whether the light from the optical switch 44 is included in the optical fiber 42 included in the optical fiber group 52. Propagate to.
  • the optical switch 46 is provided after the optical fiber group 52 and propagates the light from the optical fibers 42 included in the optical fiber group 52 to the output terminal 47.
  • the types of the optical switches 43 to 46 are not particularly limited.
  • the optical switches 43 to 46 may be, for example, a MEMS (Micro Electro Mechanical System) type optical switch, a waveguide type optical switch, an optical switch using the refractive index of a transmissive optical element, or another form of optical switch. But it's okay.
  • optical switches 44 and 46 instead of the optical switches 44 and 46 for propagating the light propagated from eight fibers to one fiber, optical components such as fiber couplers and combiners may be used.
  • the output terminal 47 is optically connected to the emission unit 5, and guides the light from the optical switch 42 to the emission unit 5.
  • the output terminal 47 is, for example, an optical connector such as an FC connector or an SC connector.
  • the difference between the length of each optical fiber 42 and the length of the shortest optical fiber 42, such as 1.370 m, is shown as the delay amount, but this delay amount is merely an example. However, the present invention is not limited to this example. Further, some of the optical fibers 42 may not be used. In the figure, the unused optical fiber 42 is described as “unused”.
  • the light emitted from the output terminal 47 diffuses according to the numerical aperture (NA) of the fiber.
  • a lens may be arranged after the output terminal 47 in order to give a sufficient amount of light to the light receiving section 12.
  • a movable lens may be built in the emitting unit 5 and the beam diameter of the light receiving unit 12 may be reduced.
  • the light propagating after the emission unit 5 is preferably parallel light until reaching the light receiving unit 12, but it does not have to be parallel light. Further, if a sufficient amount of light can be secured, a condensing optical element such as a lens may not be used.
  • the lidar inspection apparatus 100 when light is emitted from the light emitting unit 11 of the rider 10 mounted on the rider mounting member 1, the light is emitted from the first region at a position higher than the light shielding plates 6 and 7.
  • the light enters the incidence unit 3 via 21.
  • the light that has entered the incidence unit 3 is guided to the optical fiber unit 4, propagates through the optical fiber 42 of the optical fiber unit 4, and then is emitted from the emission unit 5.
  • the emitted light is taken into the inside of the light shielding structure 92 through the slit 93 provided in the light shielding structure 92 of the connection portion 9 via the second region 22 located at a position lower than the light shielding plates 6 and 7.
  • the light is received by the light-receiving section 12 of the lidar provided inside.
  • the propagation time from the emission of light from the light emitting unit 11 to the reception of light by the light receiving unit 12 is measured, and the propagation distance (optical path length) of light calculated from the propagation time and the propagation of light
  • the lidar 10 can be inspected based on the length of the optical fiber 42. Note that half of the propagation distance of the light propagated through the optical fiber corresponds to the distance between the lidar 10 and the object to be measured.
  • the inspection can be performed while changing the distance detected by the lidar 10. Further, the rider mounting member 1 is rotated by the rotating stage 2, and the angular directions of the light emitting unit 11 and the light receiving unit 12 of the rider 10 can be changed accordingly. Therefore, the inspection regarding the viewing angle of the rider 10 can be performed.
  • the angle direction in order to inspect the viewing angle of the rider 10, the angle direction can be changed by supporting the rider 10 on the rotary stage 2.
  • the angle of the injection unit 5 can be fixed by fixing the rider 10.
  • a method of inspecting the viewing angle of the rider 10 using a movable stage whose position is variable may be used.
  • the lidar inspection device 100 is a lidar inspection device that inspects the lidar 10 that includes the light emitting unit 11 that emits light and the light receiving unit 12 that receives light.
  • a detachable lidar mounting member 1 an optical fiber 42, an incident section 3 for guiding the light from the light emitting section 11 to the optical fiber 42, and an emitting section for emitting the light propagating through the optical fiber 42 toward the light receiving section 12. 5, the first region 21 between the light emitting unit 11 and the incident unit 3, and the second region 22 between the emitting unit 5 and the light receiving unit 12 optically shield each other.
  • the rider inspection device 100 further includes a rotary stage 2 that rotatably supports the rider mounting member 1. Therefore, it is possible to detect the light propagating through the optical fiber 42 while changing the angle of the lidar 10, and it is possible to perform an inspection according to the entire viewing angle of the lidar 10.
  • the light shielding plate 6 is rotatable together with the rider mounting member 1, and the light shielding plate 7 is provided closer to the incident portion 3 and the emission portion 5 than the light shielding plate 6, and a part of the light shielding plate 6 is provided. Overlap with. Therefore, even when the rider mounting member 1 is rotated, it is possible to optically and reliably shield the scattered light from the first region 21 and the second region 22, and thus, it is possible to prevent the error signal from being detected. It is possible to inspect a high lidar 10.
  • the present embodiment there are a plurality of optical fibers 42, and the lengths of the optical fibers 42 are different from each other. Therefore, it is possible to inspect the lidar 10 for different light propagation distances.
  • the lidar inspection apparatus 100 further includes optical switches 43 to 46 that switch the optical fiber 42 that propagates the light from the incident unit 3. Therefore, it becomes possible to inspect the lidar 10 while changing the light propagation distance.
  • the plurality of optical fibers 42 are divided into a plurality of optical fiber groups 51 and 52 provided in multiple stages, and the optical switch is provided in the preceding stage of each optical fiber group 51 and 52, respectively.
  • Light is input to any one of the optical fibers 42 included in the group. Therefore, it is possible to combine the optical fibers 42 through which light propagates, and it is possible to generate a pattern with a large propagation distance with a small number of optical fibers 42, and it is possible to reduce the cost and the number of parts. become.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Optics & Photonics (AREA)
  • Optical Radar Systems And Details Thereof (AREA)
  • Optical Couplings Of Light Guides (AREA)

Abstract

L'invention concerne un dispositif d'inspection de détecteur de télémétrie qui facilite l'inspection d'un détecteur de télémétrie. Un dispositif d'inspection lidar 100 est destiné à inspecter un lidar 10 comportant une unité d'émission de lumière 11 pour émettre de la lumière et une unité de réception de lumière 12 pour recevoir de la lumière, le dispositif d'inspection lidar étant pourvu : d'un élément de montage lidar 1 auquel/duquel le lidar 10 peut être fixé/détaché ; d'une fibre optique ; d'une unité d'incidence 3 pour guider la lumière provenant de l'unité d'émission de lumière 11 dans la fibre optique ; d'une unité d'émission 5 pour émettre de la lumière qui s'est propagée à travers la fibre optique vers l'unité de réception de lumière 12 ; et d'écrans de protection contre la lumière 6, 7 pour protéger optiquement, l'une de l'autre, une première région 21 entre l'unité d'émission de lumière 11 et l'unité d'incidence 3 et une seconde région 22 entre l'unité d'émission 5 et l'unité de réception de lumière 12.
PCT/JP2020/001754 2019-01-29 2020-01-20 Dispositif d'inspection de détecteur de télémétrie WO2020158487A1 (fr)

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JP2019-012832 2019-01-29
JP2019012832A JP6741803B2 (ja) 2019-01-29 2019-01-29 測距検出器検査装置

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WO2020158487A1 true WO2020158487A1 (fr) 2020-08-06

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WO2023054883A1 (fr) * 2021-09-29 2023-04-06 주식회사 에스오에스랩 Procédé et appareil d'évaluation de performance par rapport à un appareil lidar

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JP6741803B2 (ja) 2020-08-19

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