CN114157349A - Method for rapidly capturing wireless optical communication terminal in large angle range - Google Patents
Method for rapidly capturing wireless optical communication terminal in large angle range Download PDFInfo
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- CN114157349A CN114157349A CN202111580953.6A CN202111580953A CN114157349A CN 114157349 A CN114157349 A CN 114157349A CN 202111580953 A CN202111580953 A CN 202111580953A CN 114157349 A CN114157349 A CN 114157349A
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- 238000004891 communication Methods 0.000 title claims abstract description 136
- 230000003287 optical effect Effects 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000000835 fiber Substances 0.000 claims description 10
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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
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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
- H04B10/40—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
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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
- H04N23/695—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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Abstract
The invention discloses a method for rapidly capturing a wireless optical communication terminal in a large angle range, which 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 both provided with a scanning execution mechanism and a pointing control mechanism. The technical scheme effectively enlarges the scanning and capturing range while ensuring the capturing time, so that the communication terminal gets rid of the dependence on a two-dimensional turntable, reduces the terminal cost and is convenient for integrated design.
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 for a wireless optical communication terminal.
Background
In wireless optical communication, an acquisition technique is a key technique, and the acquisition technique is used for establishing a link between two communication terminals and recovering the link when the link is interrupted. At present, in domestic and abroad, the ground wireless optical communication capturing technology firstly needs to locate the position of the terminal of the other party and then scans in a small uncertain area (generally milliradian magnitude) to capture a target. When positioning means such as GPS cannot be used, the optical communication terminal needs to scan a wide range and control the acquisition time.
At present, a two-dimensional turntable is generally adopted as an executing mechanism for scanning and capturing, although the two-dimensional turntable can realize large-angle rotation, the two-dimensional turntable has low bandwidth and long response time, and meanwhile, the receiving view field of the optical communication terminal can be changed when large-angle scanning is carried out, so that the response of the opposite optical communication terminal needs to be waited for when one position point is scanned, and the scanning time can be greatly increased. Therefore, when positioning means such as a GPS cannot be used, the conventional capturing method cannot meet the requirement of rapidly capturing a target in a wide angle range.
Disclosure of Invention
The invention aims to provide a method for rapidly acquiring a wireless optical communication terminal in a large angle range, aiming at the defects of the prior art. The method can realize the large-angle range quick scanning capture of the target, has simple operation and can quickly establish communication.
The technical scheme for realizing the purpose of the invention is as follows:
a method for quickly capturing a wireless optical communication terminal in a large angle range 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 the visual axis pointing direction of a beacon light and a signal light receiving visual field and the emission optical axis of the signal light, 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 emission light path, the beacon light emission light path consists of a first single-mode fiber and a first lens, the single-mode fiber emits beacon light, the beacon light is expanded by the lens and is reflected by the scanning executing mechanism to form a beacon light emission beam, and the reflection angle of the scanning executing mechanism is adjustable and is used for controlling the beacon light emission beam to execute scanning action; the directional control mechanism is a voice coil motor micro vibrating mirror, the signal light emitting light path is provided with a second single mode fiber and a second lens, the dichroic mirror is positioned between the directional control mechanism and the signal light emitting light path, the second single mode fiber emits signal light, the signal light is expanded by the second lens and then transmits light beams through the dichroic mirror, the signal light is reflected by the directional control mechanism to form a signal light emitting light beam, the camera receiving light path is provided with a CMOS camera and a third lens, the signal light receiving light path is provided with a signal detector and a fourth lens, the dichroic mirror is positioned between the camera receiving light path and the first dichroic mirror, the received light beam is transmitted and reflected by the dichroic mirror 8 after being reflected by the directional control mechanism, the transmitted light beam enters the camera receiving light path, and the reflected light beam enters the signal light receiving light path; the method adopts a skip step-scanning capture mode, namely, the pointing control mechanism executes skip step movement and a follow-up tracking and scanning execution mechanism executes scanning movement on 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 an opposite end direction, and then starting automatic capture, wherein the communication terminal A and the communication terminal B are in short-distance ground wireless optical communication, and a target range can be approximately determined according to observation;
2) the scanning executing mechanism 1 of the communication terminal A executes scanning movement, a scanning target area is 50 degrees multiplied by 50 degrees, the pointing control mechanism of the communication terminal B keeps staring and detects a beacon optical signal of the terminal A, 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 2 of the communication terminal A keeps staring and detects a beacon optical signal of the communication terminal B;
3) after the scanning execution mechanism of the communication terminal A finishes scanning for one circle, the control mechanism of the communication terminal B jumps and then keeps staring, the beacon optical 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 finishes scanning for one circle, the pointing control mechanism of the communication terminal A jumps and then keeps staring, the beacon optical 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 the beacon light signal or not, and if not, returning to the step 2); if yes, entering 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, the end which detects the beacon light enters step 5), the end which detects the beacon light points to the control mechanism to stop executing the actions in step 2) and step 3), and the end which does not detect the beacon light returns to step 2) to continue executing the specified action;
5) a pointing control mechanism of the communication terminal A or the communication terminal B points to the opposite end according to the position of the light spot, and then the step 6) is carried out;
6) after the communication terminal A or the communication terminal B continuously detects the signal light signal, the tracking is started, 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 large target area can be quickly scanned and covered;
the bandwidth of the voice coil motor micro galvanometer is 300-400Hz, the deflection angle can reach +/-30 degrees, a target signal can be quickly responded, real-time tracking of a target can be completed, the requirements on a receiving view field and a beacon light divergence angle of a detector are high, and quick capture of the target can be realized.
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 influence each other, and the scanning executing mechanism is positioned in the beacon light emitting optical path and does not influence the receiving optical axis of the beacon light and the receiving and transmitting optical axis of the signal light; the pointing control mechanism is positioned in the signal light receiving and transmitting light path, the transmitting optical axis of the beacon light cannot be influenced, the beacon light and the signal light have the same wavelength and different divergence angles, the divergence angle of the beacon light is larger, and the divergence angle of the signal light is smaller.
This technical scheme is different from prior art is that the configuration of optical communication terminal is equipped with scanning actuating mechanism and directional control mechanism, no longer dispose the two-dimensional revolving stage, adopt scanning actuating mechanism and directional control mechanism jointly to carry out and catch work, scanning actuating mechanism adopts the miniature mirror that shakes of MEMS, the bandwidth is around several kilohertz, can scan fast and cover great target area, directional control mechanism adopts the miniature mirror that shakes of voice coil motor, the bandwidth is high, this technical scheme has enlarged the scope of scanning and catching when guaranteeing to catch time effectively, make communication terminal break away from the reliance to the two-dimensional revolving stage, the terminal cost is reduced, be convenient for integrate the design.
Drawings
Fig. 1 is a schematic diagram of the internal communication principle of the communication terminal in the embodiment;
FIG. 2 is a schematic diagram of an embodiment of a capture process;
fig. 3 is a schematic view of a scanning track.
In the figure, 1, a scanning actuator 2, a pointing control mechanism 3, a beacon light emission optical path 4, a camera receiving optical path 5, a signal light receiving optical path 6, a signal light emission optical path 7, a dichroic mirror 8, a dichroic mirror 9, a raster scanning track 10, a spiral raster scanning track 11, a constant pitch constant linear speed spiral scanning track 12, a first single mode fiber 13, a first lens 14, a second single mode 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, but the invention is not limited thereto.
Example (b):
referring to fig. 2, a method for rapidly capturing a wireless optical communication terminal in a large angle range 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 actuator 1 and a pointing control mechanism 2, the scanning actuator 1 controls beacon light to perform scanning motion, the pointing control mechanism 2 controls beacon light, a visual axis pointing direction of a signal light receiving visual field and an emission optical axis of the signal light, in an internal structure of the communication terminal a or the communication terminal B, the scanning actuator 1 is an MEMS micro galvanometer, the scanning actuator 1 is located behind a beacon light emission optical path 3, the beacon light emission optical path 3 is composed of a first single-mode fiber 12 and a first lens 13, the first single-mode fiber 12 emits beacon light, the beacon light is expanded by the first lens 13 and is reflected by the scanning actuator 1 to form a beacon light emission beam, the reflection angle of the scanning executing mechanism 1 is adjustable and is used for controlling the beacon light emitting beam to execute scanning action; the directional control mechanism 2 is a voice coil motor micro-galvanometer, the signal light emitting optical path 6 is provided with a second single-mode light 14 and a second lens 15, the dichroic mirror 7 is positioned between the directional control mechanism 2 and the signal light emitting optical path 6, the second single-mode optical fiber 14 emits signal light, the signal light is expanded by the second lens 15 and then transmits light beams through the dichroic mirror 7, and then is reflected by the directional control mechanism 2 to form signal light emitting light beams, the camera receiving optical path 4 is provided with a CMOS camera 16 and a third lens 17, the signal light receiving optical path 5 is provided with a signal detector 18 and a fourth lens 19, the dichroic mirror 8 is positioned between the camera receiving optical path 4 and the first dichroic mirror 7, the received light beams are reflected by the directional control mechanism 2 and the dichroic mirror 7 and then are transmitted and reflected by the dichroic mirror 8, the transmitted light beams enter the camera receiving optical path 4, and reflected light beams enter the signal light receiving optical path 5; the direction control mechanism 2 is adjustable in reflection angle and used for controlling the deflection angle of the transmitting/receiving light beams, the dichroic mirror 7 transmits the transmitting light beams and reflects the receiving light beams according to different wavelengths, the spectroscope 8 transmits/reflects the receiving light beams according to a set energy ratio, and the method adopts a skip step-scanning capture mode, namely, the direction control mechanism executes skip step movement and a follow-up tracking and scanning execution mechanism executes scanning movement on 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 an opposite end direction, and then starting automatic capture, wherein the communication terminal A and the communication terminal B are in short-distance ground wireless optical communication, and a target range can be approximately determined according to observation;
2) the scanning executing mechanism 1 of the communication terminal A executes scanning movement, a scanning target area is in the order of 50 degrees multiplied by 50 degrees, the pointing control mechanism 2 of the communication terminal B keeps staring and detects a beacon optical signal of the terminal A, meanwhile, the scanning executing mechanism of the communication terminal B executes scanning movement, the scanning target area is in the order of 50 degrees multiplied by 50 degrees, the pointing control mechanism 2 of the communication terminal A keeps staring and detects the beacon optical signal of the communication terminal B;
3) after the scanning execution mechanism of the communication terminal A finishes scanning for one circle, the control mechanism of the communication terminal B jumps and then keeps staring, the beacon optical 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 finishes scanning for one circle, the pointing control mechanism of the communication terminal A jumps and then keeps staring, the beacon optical 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 the beacon light signal or not, and if not, returning to the step 2); if yes, entering 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, the end which detects the beacon light enters step 5), the end which detects the beacon light points to the control mechanism to stop executing the actions in step 2) and step 3), and the end which does not detect the beacon light returns to step 2) to continue executing the specified action;
5) a pointing control mechanism of the communication terminal A or the communication terminal B points to the opposite end according to the position of the light spot, and then the step 6) is carried out;
6) after the communication terminal A or the communication terminal B continuously detects the signal light signal, the tracking is started, 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 the scanning track of the communication terminal, where 9 is raster scanning, 10 is raster spiral scanning, and 11 is constant-pitch linear speed spiral scanning, and when the scanning actuator 1 executes the scanning operation, any one of the modes can be selected for scanning.
Claims (1)
1. A method for rapidly capturing a wireless optical communication terminal in a large angle range 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 both provided with a scanning executing mechanism and a pointing control mechanism; the directional control mechanism is a voice coil motor micro vibrating mirror, the signal light emitting light path is provided with a second single mode fiber and a second lens, the dichroic mirror is positioned between the directional control mechanism and the signal light emitting light path, the second single mode fiber emits signal light, the signal light is expanded by the second lens and then transmits light beams through the dichroic mirror, and then is reflected by the directional control mechanism to form a signal light emitting light beam, the camera receiving light path is provided with a CMOS camera and a third lens, the signal light receiving light path is provided with a signal detector and a fourth lens, the dichroic mirror is positioned between the camera receiving light path and the dichroic mirror, the received light beam is transmitted and reflected through the dichroic mirror after being reflected by the directional control mechanism and the dichroic mirror, the transmitted light beam enters the camera receiving light path, and the reflected light beam enters the signal light receiving light path; the method adopts a skip step-scanning capture mode, namely, the pointing control mechanism executes skip step movement and a follow-up tracking and scanning execution mechanism executes scanning movement on 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 an opposite end direction, and then starting automatic capture, wherein the communication terminal A and the communication terminal B are in short-distance ground wireless optical communication, and a target range can be approximately determined according to observation;
2) the scanning executing mechanism of the communication terminal A executes scanning movement, a scanning target area is 50 degrees multiplied by 50 degrees, the pointing control mechanism of the communication terminal B keeps staring and detects the beacon optical signal of the terminal A, 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 staring and detects the beacon optical signal of the communication terminal B;
3) after the scanning execution mechanism of the communication terminal A finishes scanning for one circle, the pointing control mechanism of the communication terminal B jumps and then keeps staring, the beacon optical 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 finishes scanning for one circle, the pointing control mechanism of the communication terminal A jumps and then keeps staring, the beacon optical signal of the communication terminal A 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 the beacon light signal or not, and if not, returning to the step 2); if yes, entering 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, the end which detects the beacon light enters step 5), the end which detects the beacon light points to the control mechanism to stop executing the actions in step 2) and step 3), and the end which does not detect the beacon light returns to step 2) to continue executing the specified action;
5) a pointing control mechanism of the communication terminal A or the communication terminal B points to the opposite end according to the position of the light spot, and then the step 6) is carried out;
6) after the communication terminal A or the communication terminal B continuously detects the signal light signal, the tracking is started, 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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