CN-116547551-B - Tracking device for optical communication and optical communication device

CN116547551BCN 116547551 BCN116547551 BCN 116547551BCN-116547551-B

Abstract

In order to enable optical axis alignment even when the optical communication tracking device on the other side is in various postures, the center positions of the plurality of LEDs included in the optical communication tracking device on the other side are specified based on the beacon light captured on the captured image captured by the camera, and the orientation of the movable mirror for adjusting the orientation of the communication light emitted from the optical communication device on the other side is controlled so that the communication light emitted from the optical communication device on the other side is incident on the specified center position. Further, the control amount of the movable mirror for emitting communication light to the center position may be calculated from data corresponding to the reference point on the captured image and information indicating the control amount of the movable mirror.

Inventors

HARUYAMA SHINICHIRO
FUJITA HIDEO
Abdul Mora Becari
HATTORI NORIKAZU

Assignees

合同会社克拉夫特·布雷恩
东洋电机株式会社

Dates

Publication Date: 20260505
Application Date: 20211221
Priority Date: 20201228

Claims (5)

1. An optical communication tracking device for performing optical axis alignment between an optical communication tracking device of the same configuration provided in an optical communication device on the opposite side and an optical communication device on the opposite side in optical communication for coaxially transmitting and receiving communication light between the optical communication device on the opposite side and the optical communication device, the optical communication tracking device of the same configuration provided in the optical communication device on the opposite side being hereinafter referred to as an opposite side tracking device, characterized by comprising: An opening portion for passing communication light from the optical communication device on the side of the party and receiving communication light from the optical communication device on the side of the party; a plurality of LEDs which are provided substantially symmetrically with respect to a passing axis of the opening of the communication light emitted from the optical communication device on the side of the present invention, and which irradiate the opposite side tracking device with a beacon light; a beam splitter that splits the light received by the opening into transmitted light and reflected light; A camera that photographs the reflected light split by the beam splitter; A movable mirror that adjusts the direction of communication light emitted from the optical communication device on the side of the movable mirror; A control unit that controls the orientation of the movable mirror; the control section acquires a captured image captured by the camera, determines center positions of a plurality of LEDs included in the opposite side tracking device from beacon light captured in the captured image, and The orientation of the movable mirror is controlled so that the communication light emitted from the optical communication device on the side of the present invention is incident on the center position.
2. The optical communication tracking device according to claim 1, wherein, The plurality of LEDs are two LEDs disposed substantially symmetrically with respect to a passing axis of the opening portion of the communication light, The control unit determines the intermediate positions of the two LEDs included in the opposite side tracking device based on the beacon light captured in the captured image, and And controlling the orientation of the movable mirror so that the communication light emitted from the optical communication device on the side of the present invention is incident on the intermediate position.
3. The tracking device for optical communication according to claim 1 or 2, wherein, The control unit refers to a storage unit storing control amount data corresponding to predetermined information indicating a control amount of the movable mirror for emitting communication light from the optical communication device on the side of the subject to the reference point, and calculates a control amount of the movable mirror for emitting communication light from the optical communication device on the side of the subject to the center position based on the control amount data corresponding to the plurality of reference points near the center position, And controlling the orientation of the movable mirror so that the communication light emitted from the optical communication device on the present side is incident on the center position, based on the calculated control amount of the movable mirror.
4. An optical communication device comprising the tracking device for optical communication according to any one of claims 1 to 3.
5. An optical communication tracking device for performing optical axis alignment between an optical communication tracking device of the same configuration provided in an optical communication device on the opposite side and an optical communication device on the opposite side in optical communication for coaxially transmitting and receiving communication light between the optical communication device on the opposite side and the optical communication device, the optical communication tracking device of the same configuration provided in the optical communication device on the opposite side being hereinafter referred to as an opposite side tracking device, characterized by comprising: An opening portion for passing communication light from the optical communication device on the side of the party and receiving communication light from the optical communication device on the side of the party; a plurality of LEDs which are provided substantially symmetrically with respect to a passing axis of the opening of the communication light emitted from the optical communication device on the side of the present invention, and which irradiate the opposite side tracking device with a beacon light; a beam splitter that splits the light received by the opening into transmitted light and reflected light; A camera that photographs the reflected light split by the beam splitter; A movable mirror that adjusts the direction of communication light emitted from the optical communication device on the side of the movable mirror; The movable mirror is controlled by a control unit so as to be oriented such that communication light emitted from the optical communication device on the side of the subject enters a center position of a plurality of LEDs included in the tracking device on the opposite side, the plurality of LEDs appearing on a captured image captured by the camera.

Description

Tracking device for optical communication and optical communication device Technical Field The present invention relates to an optical communication tracking device capable of performing optical axis alignment with an optical communication tracking device of the same configuration provided in an optical communication device on the other side, and an optical communication device including the optical communication tracking device. Background One of the contactless communication means between two points is optical communication technology. Optical communication is a technique that enables high-speed and large-capacity transmission because optical data communication is an optical-based data communication. In order to reliably perform communication between two points spaced apart from each other, it is necessary to use an optical signal having high directivity, and to perform optical axis alignment accurately. For example, patent document 1 discloses a tracking device that uses Beacon Light (Beacon Light) emitted from a partner device to track (capture and track) the partner device with respect to a technique for performing optical axis alignment for optical communication with the partner device. Prior art literature Patent literature Patent document 1 JP patent No. 6005377. Disclosure of Invention Problems to be solved by the invention The tracking device described in patent document 1 can perform optical communication between the communication devices on the side of the user and the counterpart using the beacon light irradiation unit and the camera, but both tracking devices are required to maintain a constant posture. The present invention has been made in view of the above-described problems, and an object thereof is to provide an optical communication tracking device capable of aligning optical axes even when the optical communication tracking device on the other side has various postures. Means for solving the problems The optical communication tracking device of the present invention is used for performing optical axis alignment between an optical communication device on the side of the present invention and an optical communication device on the opposite side of the present invention, in optical communication for transmitting and receiving communication light coaxially with the optical communication device on the opposite side, and the optical communication tracking device (hereinafter referred to as an opposite side tracking device) having the same configuration as that provided in the optical communication device on the opposite side of the present invention, and is characterized by comprising an opening for allowing communication light from the optical communication device on the opposite side to pass through and for receiving communication light from the optical communication device on the opposite side of the present invention, a plurality of LEDs arranged substantially symmetrically with respect to the passing axis of the communication light emitted from the optical communication device on the opposite side of the present invention, for irradiating a beacon light to the opposite side tracking device, splitting the light received by the opening into transmission light and reflection light, a camera for capturing the reflection light split by the beam splitter, a movable mirror for adjusting the orientation of the communication light emitted from the optical communication device on the opposite side of the present invention, a control unit for controlling the orientation of the communication light emitted from the optical communication device on the opposite side of the present invention, and a plurality of LEDs for controlling the orientation of the movable mirror to be captured by the movable mirror from the opposite side of the camera, and the camera for capturing the communication light from the center of the communication device on the opposite side of the present invention. In the optical communication tracking device according to the present invention, the plurality of LEDs may be two LEDs disposed substantially symmetrically with respect to a passing axis of the communication light passing through the opening, and the control unit may determine an intermediate position of the two LEDs included in the opposite side tracking device based on the beacon light captured in the captured image, and may control the orientation of the movable mirror so that the communication light emitted from the optical communication device on the opposite side enters the intermediate position. In the optical communication tracking device according to the present invention, the control unit may refer to a storage unit storing control amount data corresponding to predetermined information indicating a control amount of the movable mirror for emitting communication light from the optical communication device on the side of the user to the reference point, calculate a control amount of the movable mirror for emitting c