CN114157349B - Large-angle-range rapid capturing method for wireless optical communication terminal - Google Patents
Large-angle-range rapid capturing method for wireless optical communication terminal Download PDFInfo
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- CN114157349B CN114157349B CN202111580953.6A CN202111580953A CN114157349B CN 114157349 B CN114157349 B CN 114157349B CN 202111580953 A CN202111580953 A CN 202111580953A CN 114157349 B CN114157349 B CN 114157349B
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- 238000004891 communication Methods 0.000 title claims abstract description 136
- 230000003287 optical effect Effects 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000000835 fiber Substances 0.000 claims description 4
- 239000013307 optical fiber Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/071—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using a reflected signal, e.g. using optical time domain reflectometers [OTDR]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/40—Transceivers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/66—Remote control of cameras or camera parts, e.g. by remote control devices
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/695—Control of camera direction for changing a field of view, e.g. pan, tilt or based on tracking of objects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/22—Adaptations for optical transmission
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses a large-angle range rapid capturing method of a wireless optical communication terminal, which comprises a communication terminal A and a communication terminal B which are arranged at different positions and have the same structure, wherein both the communication terminal A and the communication terminal B are provided with a scanning executing mechanism and a pointing control mechanism. The scanning executing mechanism and the pointing control mechanism are adopted to jointly execute capturing operation, the scanning executing mechanism adopts the MEMS micro vibrating mirror, the bandwidth is about a few kilohertz, a large target area can be rapidly scanned and covered, the pointing control mechanism adopts the voice coil motor micro vibrating mirror, the bandwidth is high, the capturing time is ensured, the scanning capturing range is effectively enlarged, the dependence on a two-dimensional turntable is eliminated from a communication terminal, the terminal cost is reduced, and the integrated design is facilitated.
Description
Technical Field
The invention belongs to the technical field of ground wireless optical communication, and particularly relates to a large-angle-range rapid capturing method of a wireless optical communication terminal.
Background
In wireless optical communication, the acquisition technology is a key technology, and the acquisition technology is used for establishing a link between two communication terminals and recovering when the link is interrupted. At present, the capturing technology of the ground wireless optical communication at home and abroad firstly needs to locate the position of the opposite terminal, and then scans in a smaller uncertain area (generally in milliradian order) to capture the target. When a positioning means such as GPS cannot be used, the optical communication terminal needs to scan a large range and control the acquisition time.
At present, the optical communication terminal generally adopts a two-dimensional turntable as an executing mechanism for scanning and capturing, although the two-dimensional turntable can realize large-angle rotation, the two-dimensional turntable has lower bandwidth and long response time, and meanwhile, the receiving view field of the optical communication terminal can be changed when large-angle scanning is performed, so that each position point scanned needs to wait for the response of the opposite optical communication terminal, and the scanning time can be greatly increased. Therefore, when positioning means such as GPS cannot be used, the existing capturing method cannot meet the requirement of quickly capturing the target in a large angle range.
Disclosure of Invention
The invention aims at overcoming the defects of the prior art and provides a rapid capturing method for a wireless optical communication terminal in a large angle range. The method can realize rapid scanning and capturing of the large-angle range of the target, is simple to operate, and can rapidly establish communication.
The technical scheme for realizing the aim of the invention is as follows:
a wireless optical communication terminal large angle range rapid capturing method comprises a communication terminal A and a communication terminal B which are arranged at different positions and have the same structure, wherein the communication terminal A and the communication terminal B are respectively provided with a scanning executing mechanism and a pointing control mechanism, the scanning executing mechanism controls beacon light to execute scanning movement, the pointing control mechanism controls visual axis pointing of a beacon light receiving visual field and a signal light emitting optical axis, in the internal structure of the communication terminal A or the communication terminal B, the scanning executing mechanism is an MEMS micro vibrating mirror, the scanning executing mechanism is positioned behind a beacon light emitting optical path, the beacon light emitting optical path consists of a first single-mode optical fiber and a first lens, the single-mode optical fiber emits the beacon light, the beacon light is expanded through the lens, and then reflected through the scanning executing mechanism to form a beacon light emitting optical beam, and the reflecting angle of the scanning executing mechanism is adjustable to control the beacon light emitting optical beam to execute scanning action; the signal light emitting optical path is provided with a second single-mode optical fiber and a second lens, the dichroic mirror is positioned between the signal light emitting optical path and the signal light emitting optical path, the second single-mode optical fiber emits signal light, the signal light firstly passes through the second lens to expand the beam and then passes through the dichroic mirror to transmit the beam, then the signal light is reflected by the signal light emitting optical path through the signal light emitting optical fiber, the camera receiving optical path is provided with a CMOS camera and a third lens, the signal light receiving optical path is provided with a signal detector and a fourth lens, the spectroscope is positioned between the camera receiving optical path and the first dichroic mirror, the received beam firstly passes through the signal light receiving optical fiber and the dichroic mirror to be reflected by the spectroscope 8, and the transmitted beam enters the camera receiving optical path and the reflected beam enters the signal light receiving optical path; the method adopts a jump-scan capturing mode, namely the pointing control mechanism executes jump movement and then executes scanning movement to the tracking and scanning execution mechanism of a target, and comprises the following steps:
1) Placing a communication terminal A and a communication terminal B, enabling the communication terminal A and the communication terminal B to approximately face to opposite directions, and then starting automatic capturing, wherein the communication terminal A and the communication terminal B are in near-field ground wireless optical communication, and the target range can be approximately determined according to observation;
2) The scanning executing mechanism 1 of the communication terminal A executes scanning movement, the scanning target area is 50 degrees multiplied by 50 degrees, the pointing control mechanism of the communication terminal B keeps gazing and detects the beacon light signal of the A terminal, meanwhile, the scanning executing mechanism of the communication terminal B executes scanning movement, the pointing control mechanism 2 of the communication terminal A keeps gazing and detects the beacon light signal of the communication terminal B;
3) The scanning execution mechanism of the communication terminal A scans a circle, the control mechanism of the communication terminal B jumps and then keeps staring, the beacon light signal of the communication terminal A is detected, at the moment, the communication terminal A starts to continuously scan the target area, the scanning execution mechanism of the communication terminal B scans a circle, the pointing control mechanism of the communication terminal A jumps and then keeps staring, the beacon light signal of the communication terminal A is detected, at the moment, the communication terminal B starts to continuously scan the target area;
4) Judging whether the communication terminal A or the communication terminal B detects a beacon light signal, if not, returning to the step 2); if yes, go to step 5), wherein the communication terminal a or the communication terminal B may not detect the beacon light at the same time, when one end of the communication terminal a or the communication terminal B detects the beacon light and the other end does not detect the beacon light, one end detecting the beacon light goes to step 5), the one end pointing control mechanism detecting the beacon light does not execute the actions in step 2) and step 3), and one end not detecting the beacon light returns to step 2) to continue executing the prescribed actions;
5) The pointing control mechanism of the communication terminal A or the communication terminal B points to the opposite end according to the light spot position, and the step 6 is entered;
6) The communication terminal A or the communication terminal B continuously detects the signal light signal and then starts tracking, the scanning is stopped, the capturing is finished, and the scanning executing mechanism can stop the scanning movement when the capturing is finished and the tracking is started.
The bandwidth of the MEMS micro galvanometer in the communication terminal A or the communication terminal B is 0.5-2KHz, the deflection angle can reach +/-30 degrees, and a larger target area can be rapidly scanned and covered;
the bandwidth of the voice coil motor micro vibrating mirror is 300-400Hz, the deflection angle can reach +/-30 degrees, the target signal can be responded quickly, the real-time tracking of the target can be completed, the requirements on the receiving field of view and the beacon light divergence angle of the detector are large, and the target can be captured quickly.
The optical paths of the beacon light and the signal light in the communication terminal A or the communication terminal B are different and do not affect each other, and the scanning executing mechanism is positioned in the transmitting optical path of the beacon light and does not affect the receiving optical axis of the beacon light and the receiving optical axis of the signal light; the pointing control mechanism is positioned in the signal light receiving and transmitting light path, the emission optical axis of the beacon light is not affected, the beacon light and the signal light have the same wavelength, the divergence angles are different, the divergence angle of the beacon light is larger, and the divergence angle of the signal light is relatively smaller.
The technical scheme is different from the prior art in that the optical communication terminal is provided with the scanning executing mechanism and the pointing control mechanism, the two-dimensional turntable is not configured any more, the scanning executing mechanism and the pointing control mechanism are adopted to jointly execute the capturing work, the scanning executing mechanism adopts the MEMS micro vibrating mirror, the bandwidth is about several kilohertz, a larger target area can be rapidly scanned and covered, the pointing control mechanism adopts the voice coil motor micro vibrating mirror, the bandwidth is high, the scanning capturing range is effectively enlarged while the capturing time is ensured, the communication terminal gets rid of the dependence on the two-dimensional turntable, the terminal cost is reduced, and the integrated design is facilitated.
Drawings
Fig. 1 is a schematic diagram of an internal communication principle of a communication terminal in an embodiment;
FIG. 2 is a schematic diagram of a capture flow in an embodiment;
fig. 3 is a schematic diagram of a scan trajectory.
In the figure, 1, a scanning executing mechanism 2, a pointing control mechanism 3, a beacon light emitting light path 4, a camera receiving light path 5, a signal light receiving light path 6, a signal light emitting light path 7, a dichroic mirror 8, a spectroscope 9, a grating scanning track 10, a spiral grating scanning track 11, an equal-pitch equal-linear-speed spiral scanning track 12, a first single-mode optical fiber 13, a first lens 14, a second single-mode optical fiber 15, a second lens 16, a CMOS camera 17, a third lens 18, a signal detector 19 and a fourth lens.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, which are not intended to limit the scope of the invention.
Examples:
referring to fig. 2, a method for rapidly capturing a wide angle range of a wireless optical communication terminal includes a communication terminal a and a communication terminal B which are arranged at different positions and have the same structure, as shown in fig. 1, the communication terminal a and the communication terminal B are both provided with a scanning executing mechanism 1 and a pointing control mechanism 2, the scanning executing mechanism 1 controls the beacon light to execute scanning movement, the pointing control mechanism 2 controls visual axis pointing of a receiving field of view of the beacon light and a transmitting optical axis of the signal light, in the internal structure of the communication terminal a or the communication terminal B, the scanning executing mechanism 1 is a MEMS micro-galvanometer, the scanning executing mechanism 1 is positioned behind a beacon light transmitting optical path 3, the beacon light transmitting optical path 3 is composed of a first single-mode fiber 12 and a first lens 13, the first single-mode fiber 12 transmits the beacon light, the beacon light is spread by the first lens 13, and then reflected by the scanning executing mechanism 1 to form a beacon light transmitting beam, and the reflecting angle of the scanning executing mechanism 1 is adjustable to control the beacon light transmitting beam to execute the scanning movement; the pointing control mechanism 2 is a voice coil motor micro vibrating mirror, the signal light emission light path 6 is provided with a second single-mode light 14 and a second lens 15, the dichroic mirror 7 is positioned between the pointing control mechanism 2 and the signal light emission light path 6, the second single-mode light 14 emits signal light, the signal light firstly passes through the second lens 15 to expand the beam and then passes through the dichroic mirror 7 to be transmitted, then the signal light is reflected by the pointing control mechanism 2 to form a signal light emission light beam, the camera receiving light path 4 is provided with a CMOS camera 16 and a third lens 17, the signal light receiving light path 5 is provided with a signal detector 18 and a fourth lens 19, the dichroic mirror 8 is positioned between the camera receiving light path 4 and the first dichroic mirror 7, the received light beam firstly passes through the dichroic mirror 7 to be reflected by the pointing control mechanism 2 and then passes through the dichroic mirror 8 to be transmitted and reflected, and the transmitted light beam enters the camera receiving light path 4 and the reflected light beam enters the signal light receiving light path 5; the reflection angle of the pointing control mechanism 2 is adjustable, which is used for controlling the deflection angle of the emitted/received light beam, the dichroic mirror 7 transmits the emitted light beam and reflects the received light beam according to different wavelengths, the spectroscope 8 transmits/reflects the received light beam according to a set energy ratio, the method adopts a jump-scan capturing mode, namely the pointing control mechanism executes jump movement and then executes scanning movement to the tracking and scanning execution mechanism of the target, and the method comprises the following steps:
1) Placing a communication terminal A and a communication terminal B, enabling the communication terminal A and the communication terminal B to approximately face to opposite directions, and then starting automatic capturing, wherein the communication terminal A and the communication terminal B are in near-field ground wireless optical communication, and the target range can be approximately determined according to observation;
2) The scanning executing mechanism 1 of the communication terminal A executes scanning movement, the scanning target area is in a measurement level of 50 degrees multiplied by 50 degrees, the pointing control mechanism 2 of the communication terminal B keeps gazing at and detects the beacon light signal of the terminal A, meanwhile, the scanning executing mechanism of the communication terminal B executes scanning movement, the pointing control mechanism 2 of the communication terminal A keeps gazing at and detects the beacon light signal of the communication terminal B;
3) The scanning execution mechanism of the communication terminal A scans a circle, the control mechanism of the communication terminal B jumps and then keeps staring, the beacon light signal of the communication terminal A is detected, at the moment, the communication terminal A starts to continuously scan the target area, the scanning execution mechanism of the communication terminal B scans a circle, the pointing control mechanism of the communication terminal A jumps and then keeps staring, the beacon light signal of the communication terminal A is detected, at the moment, the communication terminal B starts to continuously scan the target area;
4) Judging whether the communication terminal A or the communication terminal B detects a beacon light signal, if not, returning to the step 2); if yes, go to step 5), wherein the communication terminal a or the communication terminal B may not detect the beacon light at the same time, when one end of the communication terminal a or the communication terminal B detects the beacon light and the other end does not detect the beacon light, one end detecting the beacon light goes to step 5), the one end pointing control mechanism detecting the beacon light does not execute the actions in step 2) and step 3), and one end not detecting the beacon light returns to step 2) to continue executing the prescribed actions;
5) The pointing control mechanism of the communication terminal A or the communication terminal B points to the opposite end according to the light spot position, and the step 6 is entered;
6) The communication terminal A or the communication terminal B continuously detects the signal light signal and then starts tracking, the scanning is stopped, the capturing is finished, and the scanning executing mechanism can stop the scanning movement when the capturing is finished and the tracking is started.
As shown in fig. 3, fig. 3 shows a scanning track of the communication terminal, where 9 is raster scan, 10 is raster helical scan, and 11 is helical scan with equal pitch and equal linear speed, and when the scanning actuator 1 performs a scanning operation, any one of the modes may be selected for scanning.
Claims (1)
1. The method is characterized by comprising a communication terminal A and a communication terminal B which are arranged at different positions and have the same structure, wherein the communication terminal A and the communication terminal B are respectively provided with a scanning executing mechanism and a pointing control mechanism; the signal light emitting optical path is provided with a second single-mode fiber and a second lens, the dichroic mirror is positioned between the signal light emitting optical path and the signal light emitting optical path, the second single-mode fiber emits signal light, the signal light firstly passes through the second lens to expand the beam and then passes through the dichroic mirror to transmit the beam, then the signal light is reflected by the signal light emitting optical path through the signal light emitting optical path, the camera receiving optical path is provided with a CMOS camera and a third lens, the signal light receiving optical path is provided with a signal detector and a fourth lens, the spectroscope is positioned between the camera receiving optical path and the dichroic mirror, the received beam firstly passes through the signal light receiving optical path after being reflected by the signal light receiving optical path and the reflected beam enters the signal light receiving optical path after being transmitted and reflected by the spectroscope; the method adopts a jump-scan capturing mode, namely the directional control mechanism executes jump movement and follow-up tracking on a target, and the scanning execution mechanism executes scanning movement, and comprises the following steps:
1) Placing a communication terminal A and a communication terminal B, enabling the communication terminal A and the communication terminal B to approximately face to opposite directions, and then starting automatic capturing, wherein the communication terminal A and the communication terminal B are in near-field ground wireless optical communication, and the target range can be approximately determined according to observation;
2) The scanning executing mechanism of the communication terminal A executes scanning movement, the scanning target area is 50 degrees multiplied by 50 degrees, the pointing control mechanism of the communication terminal B keeps gazing, and detects the beacon light signal of the A terminal, meanwhile, the scanning executing mechanism of the communication terminal B executes scanning movement, the scanning target area is 50 degrees multiplied by 50 degrees, the pointing control mechanism of the communication terminal A keeps gazing, and detects the beacon light signal of the communication terminal B;
3) The scanning execution mechanism of the communication terminal A scans a circle, the pointing control mechanism of the communication terminal B jumps and then keeps staring, the beacon light signal of the communication terminal A is detected, at the moment, the communication terminal A starts to continuously scan the target area, the scanning execution mechanism of the communication terminal B scans a circle, the pointing control mechanism of the communication terminal A jumps and then keeps staring, the beacon light signal of the communication terminal B is detected, at the moment, the scanning execution mechanism of the communication terminal B starts to continuously scan the target area;
4) Judging whether the communication terminal A or the communication terminal B detects a beacon light signal, if not, returning to the step 2); if yes, go to step 5), wherein the communication terminal a or the communication terminal B may not detect the beacon light at the same time, when one end of the communication terminal a or the communication terminal B detects the beacon light and the other end does not detect the beacon light, one end detecting the beacon light goes to step 5), the one end pointing control mechanism detecting the beacon light does not execute the actions in step 2) and step 3), and one end not detecting the beacon light returns to step 2) to continue executing the prescribed actions;
5) The pointing control mechanism of the communication terminal A or the communication terminal B points to the opposite end according to the light spot position, and the step 6 is entered;
6) The communication terminal A or the communication terminal B continuously detects the signal light signal and then starts tracking, the scanning is stopped, the capturing is finished, and the scanning executing mechanism can stop the scanning movement when the capturing is finished and the tracking is started.
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