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High-precision free space type sun tracker and tracking method thereof

A technology of sun tracking and free space, applied in the direction of measuring sunlight, instruments, measuring devices, etc., can solve the problems of laser heterodyne efficiency reduction, inversion gas concentration measurement accuracy deviation, etc., to improve image acquisition accuracy and improve image clarity The effect of increasing the efficiency of collecting sunlight

Pending Publication Date: 2021-01-12
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the laser heterodyne detection, the sunlight is used as the signal light to explore the atmospheric absorption spectrum. Small tracking errors will lead to a decrease in the efficiency of the laser heterodyne, and the deviation of the measurement accuracy of the inversion gas concentration caused by the tracking error.

Method used

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  • High-precision free space type sun tracker and tracking method thereof
  • High-precision free space type sun tracker and tracking method thereof
  • High-precision free space type sun tracker and tracking method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] like Figure 1-6 As shown, a high-precision free-space solar tracker includes a data processing system, a sun tracking system and a light processing system, wherein the data processing system includes a host computer program 10 and a host computer image processing program 11, and the host computer program 10 has a time and spatial position measurement function; the sun tracking system includes a motor controller 21, a motor 22 and a tracking part, the motor controller 21 obtains instructions from the host computer program 10 to control the motor 22 to drive the tracking part to perform sun tracking; the light processing system includes a light output mirror 31 , window 32 , imaging tube 33 and high pixel CCD detector 34 , the light processing system is used to collect the light spot collected by the sun tracking system and transmit it to the upper computer image processing program 11 .

[0044]The motor 22, the motor controller 21 and the light processing system are arr...

Embodiment 2

[0051] like Figure 7 As shown, the second embodiment is the same as the first embodiment, the difference is that the optical processing system is also connected to a laser heterodyne system. A through hole 42 is opened on the side wall of the closed box 40 close to the window sheet 32, and the through hole 42 is arranged on the transmission light path of the window sheet 32, so that the sunlight transmitted by the window sheet 32 ​​enters the laser heterodyne system through the through hole 42. as a signal light source for laser heterodyne detection.

Embodiment 3

[0053] The tracking method of the high-precision free-space solar tracker includes the following steps:

[0054] S1. The host computer program 10 calculates the initial sun altitude angle and azimuth angle through the known time and position information, and obtains the position of the light incident reflector 232 in the current tracking unit 23 and the time when the light incident reflector 232 needs to face the sun. The angle difference between the positions is converted into the number of steps that the motor 22 and the carrying motor 231 need to rotate and sent to the motor controller 21. After the motor controller 21 receives the rotation command, it controls the motor 22 to drive the tracking part 23 to rotate in the horizontal direction to make the tracking part rotate. In 23, the light incident reflector 232 is aimed at the sun, and at the same time, the bearing motor 231 controls the light incident reflector 232 to rotate around the set fixed axis and adjust the angle ...

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Abstract

The invention belongs to the field of automatic control, and particularly relates to a high-precision free space type sun tracker and a tracking method thereof. The system comprises a data processingsystem, a sun tracking system and an optical processing system, the data processing system comprises an upper computer program and an upper computer image processing program, and the upper computer program has a time and space position measuring and calculating function; the sun tracking system comprises a motor controller, a motor and a tracking part; the motor controller acquires an instructionfrom an upper computer program to control the motor to drive the tracking part to track the sun; the light processing system comprises a light emitting reflector, a window sheet, an imaging cylinder and a high-pixel CCD detector. The light processing system is used for collecting light spots of light collected by the sun tracking system and transmitting the light spots to an upper computer image processing program. The tracker is high in tracking precision, and can be used as a matching device of an intermediate infrared laser heterodyne technology to provide a detection signal light source for a laser heterodyne system.

Description

technical field [0001] The invention belongs to the field of automatic control, and in particular relates to a high-precision free-space solar tracker and a tracking method thereof which can be applied to a mid-infrared laser heterodyne system. [0002] technical background [0003] Laser heterodyne detection technology has been widely used in atmospheric trace gas column concentration measurement and vertical profile inversion in recent years. It has the advantages of high resolution, short sampling time, small size and light weight. The matching of the LO has strict requirements. As a sun tracker that provides signal light, it must ensure that the signal light it provides has high directional accuracy in order to meet the measurement requirements. In order to collect sunlight with maximum efficiency, the optical collection part must be accurately pointed to the sun, so that the angle of the collected sunlight does not change after entering the heterodyne system at any time...

Claims

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Application Information

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IPC IPC(8): G01C21/02G01J1/42
CPCG01C21/025G01J1/42G01J2001/4266
Inventor 高晓明薛正跃刘笑海谈图
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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