Atmospheric coherence length measuring device and method integrated with POE power supply communication

Abstract

The invention relates to the technical field of atmospheric optical measurement, in particular to an atmospheric coherence length measuring device and method integrating POE power supply communication, the device comprises a telescope module, a star guide module, a power supply communication module and a control module, and in the method, the power supply communication module supplies power to the telescope module, the star guide module and the control module; the control module controls the star guiding module and the telescopic module through the power supply communication module to complete star pointing, star guiding, star following and target fixed star shooting respectively, the whole power supply and communication can be completed only by using one network cable in the whole process, the use of cables is reduced, the device is more concise, and the cost is reduced. And the possibility of cable winding during the working period of the device is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of atmospheric optical measurement, and in particular relates to an atmospheric coherence length measurement device and method integrated with POE power supply communication. Background Art

[0002] When light propagates in the atmosphere, it will produce light intensity fluctuations and phase fluctuations due to the influence of atmospheric turbulence. For imaging systems, light intensity fluctuations and phase fluctuations will lead to blurred imaging. In astronomy, the light wavefront fluctuations caused by atmospheric turbulence make the actual resolution of optical telescopes closely related to the atmospheric coherence length. With the development of modern optical technologies such as space target detection, adaptive optics, and laser communication, the requirement of obtaining the atmospheric correlation length on the optical transmission path has been proposed. At present, the more mainstream method for measuring atmospheric coherence length is DIMM (differential image motion monitor). In this method, a light source is imaged at two positions not far apart, and the distance variance of the imaging spot centroids of the two is used to invert the value of the atmospheric coherence length. Its advantage is that it avoids the traditional method of only forming one image and measuring the arrival angle fluctuation of the centroid of the image, which leads to measurement errors caused by mechanical vibration, light source jitter and other factors when inverting the value of the atmospheric coherence length. However, in actual use, two COMS (Complementary Metal-Oxide-Semiconductor) detectors are required to guide the star and obtain the spot image respectively. In addition, lasers are required to assist in star search. The detectors need to be connected to the power cord and the communication network cable, and the lasers need to be connected to the control cable. In actual use, the computer needs to connect more wires, the wiring harness connection is complicated, and the installation is time-consuming. In addition, due to the large number of wiring harnesses, the equipment may be entangled when tracking the star at night, affecting the normal operation of the equipment. Summary of the invention

[0003] In view of this, the present invention aims to provide an atmospheric coherence length measurement device with integrated POE power supply and communication, so as to supply power to the communication module, realize power supply and communication with the telescope module, the guide module and the control module with one network cable, reduce the use of cables, make the device more concise, and reduce the possibility of cable entanglement during the operation of the device.

[0004] To achieve the above object, the technical solution created by the present invention is implemented as follows: An atmospheric coherence length measuring device integrated with POE power supply and communication comprises a telescope module, a guide module, a power supply and communication module and a control module; wherein the power supply and communication module supplies power to the telescope module, the guide module and the control module respectively; the control module controls the guide module to search for and point to a target star through the power supply and communication module; and the control module controls the telescope module to follow the target star and photograph the target star through the power supply and communication module.

[0005] Furthermore, the telescope module includes a telescope and a primary mirror camera arranged on the telescope; wherein the primary mirror camera is connected to the power supply and communication module; the telescope follows the guide module to follow the star so that the target star is stably imaged in the primary mirror camera; and the control module controls the primary mirror camera to shoot the target star through the power supply and communication module.

[0006] Furthermore, the guide module includes a guide mirror, a guide camera and a laser; wherein the guide camera and the laser are respectively connected to the power supply and communication module; the control module sends a control command to the guide camera through the power supply and communication module, so that the guide mirror and the guide camera search for the target star; the control module controls the laser to emit a laser to the target star through the power supply and communication module, thereby pointing to the target star.

[0007] Furthermore, the power supply communication module includes a POE (Power over Ethernet) power supply, a POE switch, a POE decomposer and a network relay; wherein the POE power supply receives external power supply and supplies power to the POE switch and the control module; the POE switch connects the primary mirror camera and the guide camera; the POE switch is connected to the POE decomposer, the POE decomposer supplies power to the network relay, and the network relay controls the laser.

[0008] A method for measuring atmospheric coherence length integrated with POE power supply communication, applicable to an atmospheric coherence length measuring device integrated with POE power supply communication provided by the present invention, comprises the following steps: S1: Connect the power supply and communication module to the primary mirror camera, guide camera, laser and control module respectively, and power on the power supply and communication module; S2: The control module turns on the primary mirror camera, guide camera and laser through the power supply and communication module; S3: Use lasers to point to the stars, guide cameras to find stars, telescopes to follow the stars, and the target stars appear stably in the primary mirror camera; S4: The control module starts calculating the atmospheric coherence length and saves the measurement data.

[0009] Compared with the prior art, the invention can achieve the following beneficial effects: In the atmospheric coherence length measurement device and method with integrated POE power supply and communication created by the present invention, by adding an integrated POE power supply and communication module, power supply and communication with the camera and laser can be achieved using only one network cable, reducing the use of cables, making the device more concise, and reducing the possibility of cable entanglement during the operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings: Figure 1 A schematic diagram of the structure of the atmospheric coherence length measurement device with integrated POE power supply communication according to an embodiment of the present invention; Figure 2 A schematic diagram of the structure of the power supply communication module according to an embodiment of the present invention; Figure 3 A flow chart of the atmospheric coherence length measurement method for integrated POE powered communication described in an embodiment of the present invention.

[0011] Description of reference numerals: 1. Power supply and communication module; 2. Control module; 3. Telescope; 4. Primary mirror camera; 5. Guide mirror; 6. Guide camera; 7. Laser; 8. POE power supply; 9. POE switch; 10. POE decomposer; 11. Network relay. DETAILED DESCRIPTION

[0012] In order to make the purpose, technical solution and advantages of the invention more clear, the invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the invention and do not constitute a limitation of the invention.

[0013] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0014] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0015] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0016] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0017] like Figure 1As shown, the atmospheric coherence length measuring device with integrated POE power supply communication described in the embodiment of the invention comprises a telescope module, a guide module, a power supply communication module 1 and a control module 2; wherein the power supply communication module 1 supplies power to the telescope module, the guide module and the control module 2 respectively; the control module 2 controls the guide module through the power supply communication module 1 to find and point to the target star; the control module 2 controls the telescope module through the power supply communication module 1 to follow the target star and shoot the target star. In the embodiment of the present invention, the control module 2 is a computer, and the atmospheric coherence length parameter calculation software for calculating the atmospheric coherence length is loaded in the computer. In the atmospheric coherence length parameter calculation software, the binarization threshold of the image is first calculated, the image is binarized, and the light spot in the image is segmented according to the binarization result of the image, so as to determine the position of the light spot, and then the grayscale image of the light spot is weighted averaged according to the position of the light spot, and the centroid coordinates of the light spot are calculated, and then the atmospheric coherence length is obtained by using the differential imaging method (DIMM). The essence of the differential imaging method (DIMM) is to detect the arrival angle fluctuation caused by wavefront distortion, which is reflected in the random jitter of the relative position of two star spots (i.e. light spots) on the image plane at the receiving end. The atmospheric coherence length is obtained by counting the jitter variance of the centroid coordinates of the two star spots. The atmospheric coherence length parameter calculation software calculates the atmospheric coherence length parameter calculation results based on this differential imaging method.

[0018] The telescope module includes a telescope 3 and a primary mirror camera 4 installed on the telescope 3. The primary mirror camera 4 is installed at the eyepiece end of the telescope 3, and the primary mirror camera 4 is connected to the power supply and communication module 1; the telescope 3 follows the guide module to follow the star, so that the target star is stably imaged in the primary mirror camera 4; the control module 2 controls the primary mirror camera 4 to shoot the target star through the power supply and communication module 1. In the embodiment of the present invention, the aperture of the telescope 3 is 280mm; the resolution of the primary mirror camera 4 is 1920×1200, and the sampling frequency is 100Hz.

[0019] The guide module includes a guide mirror 5, a guide camera 6 and a laser 7. The laser 7 and the guide mirror 5 are mounted on the lens barrel of the telescope 1, and the guide camera 6 is mounted at the eyepiece end of the guide mirror 5. The guide mirror 5 has a short focal length and a large field of view, so more stars can be seen. The guide camera 6 receives what the guide mirror 5 sees. The guide camera 6 and the laser 7 are respectively connected to the power supply and communication module 1. The control module 2 sends a control command to the guide camera 6 through the power supply and communication module 1, so that the guide mirror 5 and the guide camera 6 search for the target star. The control module 2 controls the laser 7 to emit a laser to the target star through the power supply and communication module 1, thereby pointing to the target star. In the embodiment of the present invention, the resolution of the guide camera 6 is 2592×1944, and the wavelength of the laser output by the laser 7 is 532nm.

[0020] The structure of the power supply communication module 1 is as follows Figure 2 As shown, it includes a POE power supply 8, a POE switch 9, a POE decomposer 10 and a network relay 11. Among them, the POE power supply 8 receives external power supply and supplies power to the POE switch 9 and the control module 2; in the embodiment of the present invention, the input voltage of the POE power supply 8 is 220V, the output voltage is 48V, and the power when supplying power to the POE switch 9 is 60W. The two Gigabit network ports of the POE switch 9 are directly connected to the main mirror camera 4 and the guide camera 6 to realize the power supply and communication of the main mirror camera 4 and the guide camera 6; one network port of the POE switch 9 is connected to the POE decomposer 10, and the POE decomposer 10 supplies power to the network relay 11, the power supply voltage is 12V, and the network relay 11 controls the switch of the laser 7. In the embodiment of the present invention, the POE switch 9 preferably adopts a non-standard 12-48V POE switch, and the output of the POE switch 9 is a four-port Gigabit network output. At the same time, in order to ensure the stability of the overall mechanical structure of the device, in an embodiment of the present invention, the power supply communication module 1 is integrated, that is, the POE switch 9, the POE decomposer 10 and the network relay 11 are all small-sized devices, and are integrated into a loading box through effective spatial layout and force design. One end of the POE power supply 8 is connected to an external power supply device that provides a 220V voltage, and two wires come out of the other end of the POE power supply 8, one wire is plugged into the power supply interface of the POE switch 9 on the loading box, and the other wire is plugged into the control module 2, so that the device connected to the POE switch 9 can communicate with the control module 2. At this time, the overall volume of the power supply communication module 1 is very small, and the volume of the telescope 3 is very large. The power supply communication module 1 can be stably installed on the barrel wall of the telescope 3. The spatial layout and force design include but are not limited to manual measurement layout, or simulation layout through existing mechanical design software and other existing mechanical design software.

[0021] The embodiment of the present invention further provides an atmospheric coherence length measurement method integrated with POE power supply communication, which is applicable to the atmospheric coherence length measurement device integrated with POE power supply communication provided by the embodiment of the present invention, such as Figure 3 As shown, the following steps are included: S1: Connect the power supply and communication module 1 to the primary mirror camera 4, the guide camera 6, the laser 7 and the control module 2 respectively, and power on the power supply and communication module 1; S2: The control module 2 starts the atmospheric coherence length parameter measurement software, and uses the software to turn on the primary mirror camera 4, the guide camera 6 and the laser 7 through the power supply communication module 1; S3: Use laser 7 to point to the star, guide camera 6 to find the star, telescope 3 to follow the star, and the target star appears stably in primary mirror camera 4; S4: The atmospheric coherence length parameter calculation software of the control module 2 starts calculating the atmospheric coherence length and saves the measurement data.

[0022] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the disclosure of the present invention can be performed in parallel, sequentially or in different orders, as long as the desired results of the technical solution disclosed in the present invention can be achieved, and this document does not limit this.

[0023] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An atmospheric coherence length measurement device with integrated POE power supply communication, characterized in that: It includes a telescope module, a guide module, a power supply and communication module and a control module; wherein the power supply and communication module supplies power to the telescope module, the guide module and the control module respectively; the control module controls the guide module to find and point to a target star through the power supply and communication module; the control module controls the telescope module to follow the target star and photograph the target star through the power supply and communication module.

2. The atmospheric coherence length measurement device integrated with POE power supply communication according to claim 1, characterized in that: The telescope module includes a telescope and a primary mirror camera arranged on the telescope; wherein the primary mirror camera is connected to the power supply and communication module; the telescope follows the guide module to follow the star, so that the target star is stably imaged in the primary mirror camera; the control module controls the primary mirror camera to shoot the target star through the power supply and communication module.

3. The atmospheric coherence length measurement device integrated with POE power supply communication according to claim 2, characterized in that: The guide module includes a guide mirror, a guide camera and a laser; wherein the guide camera and the laser are respectively connected to the power supply and communication module; the control module sends a control command to the guide camera through the power supply and communication module, so that the guide mirror and the guide camera search for the target star; the control module controls the laser to emit laser to the target star through the power supply and communication module, thereby pointing to the target star.

4. The atmospheric coherence length measurement device integrated with POE power supply communication according to claim 3, characterized in that: The power supply communication module includes a POE power supply, a POE switch, a POE decomposer and a network relay; wherein the POE power supply receives external power supply and supplies power to the POE switch and the control module; the POE switch connects the primary mirror camera and the guide camera; the POE switch is connected to the POE decomposer, the POE decomposer supplies power to the network relay, and the network relay controls the laser.

5. A method for measuring atmospheric coherence length integrated with POE power supply communication, applicable to the atmospheric coherence length measuring device integrated with POE power supply communication as claimed in claim 4; characterized in that: The following steps are involved: S1: connecting the power supply and communication module to the primary mirror camera, the guide camera, the laser and the control module respectively, and powering on the power supply and communication module; S2: the control module turns on the primary mirror camera, the guide camera and the laser through the power supply and communication module; S3: using the laser to point to the star, the guide camera to find the star, the telescope to follow the star, and the target star to appear stably in the primary mirror camera; S4: The control module starts calculating the atmospheric coherence length and saves the measurement data.

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