CN114061753A - Sunlight meter based on mobile unstable platform - Google Patents
Sunlight meter based on mobile unstable platform Download PDFInfo
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- CN114061753A CN114061753A CN202111275243.2A CN202111275243A CN114061753A CN 114061753 A CN114061753 A CN 114061753A CN 202111275243 A CN202111275243 A CN 202111275243A CN 114061753 A CN114061753 A CN 114061753A
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- G—PHYSICS
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- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
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- G01J3/0202—Mechanical elements; Supports for optical elements
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- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/02—Details
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- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
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- G01J1/0242—Control or determination of height or angle information of sensors or receivers; Goniophotometry
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- G01J1/0266—Field-of-view determination; Aiming or pointing of a photometer; Adjusting alignment; Encoding angular position; Size of the measurement area; Position tracking; Photodetection involving different fields of view for a single detector
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- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
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- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
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- G01J3/0289—Field-of-view determination; Aiming or pointing of a spectrometer; Adjusting alignment; Encoding angular position; Size of measurement area; Position tracking
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- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/2823—Imaging spectrometer
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Abstract
The invention discloses a solar photometer based on a mobile unstable platform, which comprises a gyro stable platform, a two-dimensional turntable arranged on the gyro stable platform, a single-arm probe, a large-field fisheye imaging system, a lower computer control system and an industrial personal computer; the front end of the single-arm probe is provided with two parallel light cylinders which are a measuring light cylinder and an imaging light cylinder respectively; the imaging optical cylinder is a small-view-field precise tracking imaging system, the measuring optical cylinder is used for collecting sunlight data and transmitting the collected data to the lower computer control system; the large-view-field fish eye imaging system is used for capturing azimuth information of the sun and transmitting the azimuth information of the sun to the industrial personal computer; the industrial personal computer is used as an integrated operation platform to coordinate and control the operation of each device, and the lower computer control system controls the two-dimensional rotary table to rotate so as to realize the automatic tracking and signal measurement of the sun. The invention can simultaneously observe the solar spectrum of a plurality of discrete bands of 400-1100 nm under a mobile unstable platform.
Description
Technical Field
The invention relates to the technical field of photoelectric detection, in particular to a sun photometer based on a mobile unstable platform.
Background
The solar photometer is also called as a solar radiometer and is mainly used for measuring the spectral characteristics of direct solar radiation, and water vapor and atmospheric aerosol are obtained by measuring the change of the direct solar radiation with different wavelengths along with the solar altitude, so that the solar photometer is good equipment for atmospheric optics, meteorological research and air pollution monitoring. However, the traditional tracking mode is a coarse and fine tracking technology combining an astronomical view daily track tracking method and a four-quadrant method, and the method is based on a stable platform and can only carry out measurement on a fixed platform under the condition that the south and north directions can be positioned. In addition, the four-quadrant method is to track the sun by using the four-quadrant light intensity distribution of the four-quadrant detector, and the method has too small tracking field angle and can only track a target which changes slowly.
It is therefore desirable to provide a solar photometer for measuring water vapor and aerosols on a moving unstable platform to address the above problems.
Disclosure of Invention
The invention aims to provide a solar photometer based on a mobile unstable platform, which can be used for simultaneously observing solar spectrums of a plurality of discrete bands of 400-1100 nm under the mobile unstable platform.
In order to solve the technical problems, the invention adopts a technical scheme that: the provided solar photometer based on a mobile unstable platform comprises a gyro stable platform, a two-dimensional rotary table arranged on the gyro stable platform, a single-arm probe arranged on one side of the two-dimensional rotary table, a large-view-field fisheye imaging system arranged on the top surface of the two-dimensional rotary table, a lower computer control system and an industrial personal computer;
the front end of the single-arm probe is provided with two parallel light cylinders which are a measuring light cylinder and an imaging light cylinder respectively; the imaging optical cylinder is a small-view-field precise tracking imaging system and is used for setting a tracking interval and transmitting the coordinate difference between the sun and the tracking interval to an industrial personal computer through precise tracking imaging; the measuring light cylinder is used for collecting sunlight data and transmitting the collected data to the lower computer control system;
the large-view-field fish eye imaging system is used for capturing azimuth information of the sun and transmitting the azimuth information of the sun to the industrial personal computer; the industrial personal computer is used as an integrated operation platform to coordinate and control the operation of each device, converts the acquired pixel pitch of the sun direction into the motor driving step number of the two-dimensional turntable, transmits the motor driving step number to the lower computer control system through serial port communication, and controls the rotation of the two-dimensional turntable by the lower computer control system to realize automatic tracking and signal measurement of the sun.
In a preferred embodiment of the invention, the two-dimensional rotary table comprises a base box, a rotating part, a speed reducer, a stepping motor and a zero positioning device;
the rotating part comprises a horizontal rotating box body vertically arranged on the base box, and the single-arm probe is parallel to the base box and is arranged on the side surface of the horizontal rotating box body;
the speed reducer and the stepping motor are arranged in the horizontal rotating box body and are used for directly driving the single-arm probe to rotate in the horizontal and pitching directions;
the zero position positioning device is arranged in the horizontal rotating box body and used for positioning the zero position of the horizontal rotating box body.
In a preferred embodiment of the invention, the large-field-of-view fisheye imaging system comprises a spherical attenuating mirror, a fisheye lens and a first digital CCD image sensor.
Further, the field angle of the fisheye lens is larger than 180 degrees.
In a preferred embodiment of the invention, the imaging light cylinder comprises an attenuation filter, a first lens and a second digital CCD image sensor, and the solar facula in the small field of view is imaged on the second digital CCD image sensor through lens imaging.
Furthermore, the inner wall of the imaging light cylinder is blackened, the front end of the imaging light cylinder is provided with a hole and is embedded with an attenuation filter, the imaging light cylinder is internally provided with a first lens, the rear end of the imaging light cylinder is provided with a hole and is provided with an external thread, and the second digital CCD image sensor is positioned inside the single-arm probe and is provided with a lens ring with an internal thread which is connected with the external thread at the rear end of the imaging light cylinder.
In a preferred embodiment of the present invention, the measuring light cylinder includes a dust-proof window mirror, a field stop group, a lens, a field stop for eliminating stray light after solar radiation passes through the dust-proof window mirror, and a lens for eliminating stray light.
In a preferred embodiment of the invention, the single-arm probe further comprises a filter wheel, a filter wheel motor and a photoelectric detector, wherein the filter wheel is provided with a plurality of optical filters with different wave bands;
during measurement, the filter wheel motor rotates to enable the filters with different wave bands to be aligned to the detection light path, the photoelectric detector obtains the solar spectrum with 400-1100 nm discrete wave bands, and the photoelectric detector transmits radiation signals to the industrial personal computer through the lower computer control system.
Furthermore, a plurality of light filters and a black light-tight block for background measurement are uniformly distributed on the filter wheel, the light filters are driven by a filter wheel motor, the positioning and switching of the light filters on the turntable are automatically controlled through a program, and the filter wheel turntable rotates for one circle to complete the spectrum measurement of each waveband.
In a preferred embodiment of the invention, the solar photometer further comprises a GPS module for acquiring real-time longitude and latitude information of the solar photometer during movement, and assisting data tracking and data inversion.
The invention has the beneficial effects that:
(1) the invention has the advantages of high precision, mobile platform measurement, wide observation range, severe environment work and integrated control, and can invert atmospheric parameters such as atmospheric transmittance, water vapor content and the like according to direct radiation data;
(2) the invention adopts a large-view-field fisheye imaging system and a double-CCD two-section coarse and fine tracking technology of an imaging light cylinder, can complete all-weather full-automatic mobile tracking on the sun under a mobile unstable platform, and has tracking precision higher than 1 angular division;
(3) the invention adopts the lens and the fish-eye lens for imaging, combines the astronomical view daily track tracking method and the image processing technology to achieve larger tracking view field and higher tracking precision, meets the requirement that the sunshine photometer is used for moving measurement under the condition of moving an unstable platform, and can also be applied to other occasions with higher requirement on the sun tracking precision under the moving state.
Drawings
FIG. 1 is a schematic perspective view of a mobile unstable platform based solar photometer of the present invention;
FIG. 2 is a schematic structural view of the single-arm probe;
FIG. 3 is a schematic view of an optical bench of the present invention;
fig. 4 is a graph of the marine transmittance measurements of the present invention.
The parts in the drawings are numbered as follows: 1. the gyroscope stabilizing platform comprises a gyroscope stabilizing platform, 2, a two-dimensional turntable, 21, a base box, 22, a horizontal rotating box body, 3, a single-arm probe, 31, a measuring light cylinder, 311, a dustproof window mirror, 312, a field diaphragm group, 3121, an aperture diaphragm, 313, a second lens, 32, an imaging light cylinder, 321, an attenuating filter, 322, a first lens, 323, a second digital CCD image sensor, 33, a filter wheel, 331, a filter, 34, a filter wheel motor, 35, a photoelectric detector, 4, a large-field fish eye imaging system, 5, a lower computer control system, 6, an industrial personal computer, 7 and a GPS module.
Detailed Description
The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.
Referring to fig. 1, an embodiment of the present invention includes:
the utility model provides a sunlight meter based on remove unstable platform, includes top stable platform 1, sets up two-dimensional revolving stage 2 on top stable platform 1, installs the one-arm probe 3 in 2 one sides of two-dimensional revolving stage, installs the big visual field fisheye imaging system 4, lower computer control system 5, industrial computer 6 and GPS module 7 at 2 top surfaces of two-dimensional revolving stage. The single-arm probe 3 can rotate on two orthogonal dimensions of a horizontal axis and a pitching axis under the driving of the two-dimensional turntable 2, and stable and accurate tracking of a target in a full airspace is realized. The solar photometer can be used for mobile measurement under an offshore mobile platform, measurement of offshore water vapor and aerosol and measurement of a vehicle-mounted platform.
Referring to fig. 2, two parallel optical cylinders, namely a measuring optical cylinder 31 and an imaging optical cylinder 32, are mounted at the front end of the single-arm probe 3; the imaging optical cylinder 32 is a small-view-field precise tracking imaging system and is used for setting a tracking interval and transmitting the coordinate difference between the sun and the tracking interval to an industrial personal computer through precise tracking imaging; the measuring light cylinder 31 is used for collecting sunlight data and transmitting the collected data to the lower computer control system 5; the large-view-field fisheye imaging system 4 is used for capturing azimuth information of the sun and transmitting the azimuth information of the sun to the industrial personal computer 6; the industrial personal computer 6 is used as an integrated operation platform to coordinate and control the operation of each device, converts the acquired pixel pitch of the sun direction into the motor driving step number of the two-dimensional turntable 2, transmits the motor driving step number to the lower computer control system through serial port communication, and controls the rotation of the two-dimensional turntable 2 through the lower computer control system 5 to realize the automatic tracking and signal measurement of the sun.
Specifically, the two-dimensional rotary table 2 comprises a base box 21, a rotating part, a speed reducer, a stepping motor and a zero position positioning device, so that the horizontal pitching rotation of the platform tracks the sun and a light splitting signal measurement system acquires data. The rotating part comprises a horizontal rotating box body 22 vertically arranged on the base box, and the single-arm probe 3 is parallel to the base box 21 and is arranged on the side surface of the horizontal rotating box body 22; the speed reducer and the stepping motor comprise two sets of equipment in horizontal and pitching directions, are arranged in the horizontal rotating box body 22 and are used for directly driving the single-arm probe 3 to rotate in the horizontal and pitching directions; the zero position positioning device is also arranged in the horizontal rotating box body 22 and is used for positioning the zero position of the horizontal rotating box body 22. The gyro stabilizing platform 1 is installed at the lower part of the base box 21 to filter high-frequency vibration under the mobile platform, and in order to prevent measurement errors caused by sea wave jolt, the gyro stabilizing platform 1 corrects the sea wave jolt to ensure the stability of equipment on the sea rocking platform. In order to ensure the detection precision, the sea state grade of the sea state detector used for sea time measurement does not exceed 4-grade sea state.
The two-dimensional rotary table 2 is characterized in that the reduction ratio of a hollow rotary platform consisting of a stepping motor and a speed reducer is 1: and 18, the angular resolution of the motor system can reach 11.25 arc seconds in cooperation with the driver.
The top of the horizontal rotating box 22 is provided with a large-view-field fisheye imaging system 4 which comprises a spherical attenuating mirror, a fisheye lens and a first digital CCD image sensor. Preferably, the field angle of the fisheye lens is larger than 180 degrees, and the sun can be captured by the fisheye lens in the sky. In the example, the CCD target surface size of the large-field fisheye imaging system is 8.8mm in width, 6.6mm in height, and the field angle of the fisheye lens is 280 degrees.
With reference to fig. 3, the imaging light cylinder 32 includes an attenuating filter 321, a first lens 322, and a second digital CCD image sensor 323, and images the solar light spot in the small field of view onto the second digital CCD image sensor 323 through lens imaging, sets a tracking interval, and transmits the coordinate difference between the sun and the tracking interval to the industrial personal computer 6.
Further, the inner wall of the imaging light cylinder 32 is blackened, the front end of the imaging light cylinder is provided with an opening and is embedded with an attenuation filter 321, the inside of the imaging light cylinder contains a first lens 322, the rear end of the imaging light cylinder is provided with an opening and is provided with an external thread, and the second digital CCD image sensor 323 is positioned inside the single-arm probe 3 and is provided with a lens ring with an internal thread which is connected with the external thread at the rear end of the imaging light cylinder 32. Preferably, the target surface of the second digital CCD image sensor 323 of the imaging optical cylinder 32 has a width of 8.5mm and a height of 7.1mm, and the field angle of the imaging through the small hole is 12.86 °; the clear aperture of the imaging light cylinder 32 is 28mm, and the focal length of the lens is 26 mm.
The light splitting signal measuring system comprises a dustproof window mirror 311, a field diaphragm group 312, a second lens 313, optical filters 331 of different wave bands arranged on a filter wheel 33 sequence, a filter wheel motor 34 and a photoelectric detector 35. The dustproof window mirror 311, the field stop group 312 and the second lens 313 are located in the measuring light cylinder 31, and the filter wheel 33, the filter wheel motor 34 and the photoelectric detector 35 are located in the single-arm probe 3. The single-arm probe 3 is provided with a dust-proof window lens 311, and the field stop 312 and the second lens 313 for eliminating stray light after solar radiation passes through the dust-proof window lens 311 can effectively eliminate the stray light. Preferably, the focal length of the measuring light path is designed to be 68.7mm, the diameter of the photoelectric detection photosensitive surface is 3.6mm, and the receiving field of view is limited to be 3 degrees by the aperture stop 3121 at the front end of the photosensitive surface. The filters 331 with different wave bands arranged on the filter wheel 33 sequence are added in the light path to select the incident sunlight, the filter wheel motor 34 rotates during measurement to enable the filters 331 with different wave bands to align with the detection light path, and the photoelectric detector 35 obtains the solar spectrum with 400-1100 nm discrete wave bands. The measured solar radiation signals are transmitted to the industrial personal computer 6 from the lower computer control system 5 through the RS422 communication transmission control protocol, and the industrial personal computer 6 reads the GPS module 7 to obtain longitude and latitude information and then carries out calculation, display and storage.
With reference to fig. 4, in this example, 11 kinds of optical filters 331 with bandwidths of 10nm, such as 400nm, 440nm, 500nm, 532nm, 610nm, 670nm, 780nm, 870nm, 940nm, 1050nm, and 1064nm, are selected according to the requirement of integrated observation of the onboard solar photometer, and the measurement bands can be customized according to the application requirement. 11 light filters and 1 black light-tight block for background measurement are uniformly and symmetrically distributed on the filter wheel 33, the light filters are driven by a hybrid stepping motor (namely a filter wheel motor 34), the positioning and switching of the light filters 331 on the rotary table are automatically controlled through a program, and the spectrum measurement of each waveband can be completed by rotating the rotary table for one circle.
In order to reduce the influence of stray light on the measurement data as much as possible, the inside of the measurement light cylinder 31 and the multi-stage field stop 312 are all subjected to blackening treatment, so that the diffused stray light outside the field angle cannot enter the light path. The photoelectric detector 35 simultaneously observes 11 discrete wave band solar spectrums of 400-1100 nm, and radiation signals are transmitted to the industrial personal computer 6 through an RS422 transmission protocol. The industrial personal computer 6 is used as an integrated operation platform of the sun photometer, coordinates and controls the operation of each device, and stores and displays atmospheric measurement data in real time.
The lower computer control system 5 takes an AVR acquisition control module as a core, and can complete various functions of automatic temperature control, data acquisition, communication and the like of the sunlight photometer. To achieve a sufficiently high measurement accuracy, a high-performance photovoltaic detection element (photodetector 35) is used, the operating temperature thereof can be controlled, and a variable gain amplifier is used to achieve a large dynamic range. The lower computer control system 5 enables distributed control of the measurement components.
The working principle of the solar photometer is as follows:
sunlight acquires fisheye images through the large-view-field fisheye imaging system 4, the distortion coefficient of the lens is calculated in a mode of carrying out corner detection on a black-white chessboard, the acquired lens distortion coefficient is input into a fisheye lens model for image correction, and the sun azimuth angle is calculated. And reading the time in the industrial personal computer 6 and the real-time longitude and latitude information of the GPS module 7, and calculating the solar altitude according to an astronomical view daily track method. The solar altitude and azimuth are converted into the driving steps of a pitching motor and a horizontal motor, the motor drives the horizontal rotating box body 21 and the single-arm probe 3 to rotate, so that the imaging light cylinder 32 faces the approximate direction of the sun, and then sunlight passes through the attenuation filter 321 and then passes through the first lens 322 with the focal length of 26mm, and then the sunlight is imaged on the target surface of the second CCD image sensor 323. The clear aperture of the imaging light cylinder 32 is 28mm, the target surface of the second CCD image sensor 323 has a width of 8.5mm and a height of 7.1 mm.
The lower computer control system 5 realizes displacement control and speed adjustment of the motor through a serial port communication protocol, and the mobile unstable platform sun tracking system can control the load such as the carrying measuring optical cylinder 31 to rotate on two orthogonal dimensions of a horizontal shaft and a pitching shaft, so that the load is stabilized in a set inertia space, and stable and accurate tracking of a target can be completed. The pitching and horizontal motors directly drive the single-arm probe 3 at the same time, an intermediate transmission mechanism is not needed, errors introduced by an intermediate transmission chain are eliminated, and the two-dimensional turntable 2 has a tracking angle resolution superior to 27 arc seconds.
The invention makes the sun tracking technology under the mobile unstable platform used in the direct solar radiation intensity measuring instrument in the atmospheric science field for the first time in China, and adopts the double CCD two-stage coarse and fine tracking technology of the large-view-field fisheye imaging system and the imaging optical cylinder, thereby realizing all-weather full-automatic tracking under the mobile unstable platform, and the tracking precision is higher than 1 angular point.
The technical indexes of the solar photometer are as follows:
a driving mode: stepper motor drive system (angular resolution 11.25 arc seconds, 2 axial);
fisheye imaging system field of view: 280 degrees;
sea condition bearing grade: less than or equal to 4;
measuring the wave band: 400-1100 nm discrete wave band;
receiving an angle of view: 3 degrees.
The advantage of sunlight meter lies in that moving platform measures, wide observation scope, adverse circumstances work and integrates the control, can invert the atmospheric parameters such as atmosphere transmittance and steam content according to direct radiation data, when having inhomogeneous cloud, utilizes the distribution of four-quadrant light intensity to trail the inaccurate limitation problem of sun meeting simultaneously. The solar photometer can simultaneously observe the solar spectrum of a plurality of discrete bands of 400-1100 nm, overcomes the limitation of the traditional solar photometer based on a fixed platform, and can complete real-time tracking and data measurement of the sun during the navigation of a ship.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A sun photometer based on a mobile unstable platform is characterized by comprising a gyro stable platform, a two-dimensional rotary table arranged on the gyro stable platform, a single-arm probe arranged on one side of the two-dimensional rotary table, a large-view-field fisheye imaging system arranged on the top surface of the two-dimensional rotary table, a lower computer control system and an industrial personal computer;
the front end of the single-arm probe is provided with two parallel light cylinders which are a measuring light cylinder and an imaging light cylinder respectively; the imaging optical cylinder is a small-view-field precise tracking imaging system and is used for setting a tracking interval and transmitting the coordinate difference between the sun and the tracking interval to an industrial personal computer through precise tracking imaging; the measuring light cylinder is used for collecting sunlight data and transmitting the collected data to the lower computer control system;
the large-view-field fish eye imaging system is used for capturing azimuth information of the sun and transmitting the azimuth information of the sun to the industrial personal computer; the industrial personal computer is used as an integrated operation platform to coordinate and control the operation of each device, converts the acquired pixel pitch of the sun direction into the motor driving step number of the two-dimensional turntable, transmits the motor driving step number to the lower computer control system through serial port communication, and controls the rotation of the two-dimensional turntable by the lower computer control system to realize automatic tracking and signal measurement of the sun.
2. The mobile unstable platform based solar photometer of claim 1, wherein the two-dimensional turntable comprises a base case, a rotating part, a speed reducer, a stepping motor, a zero positioning device;
the rotating part comprises a horizontal rotating box body vertically arranged on the base box, and the single-arm probe is parallel to the base box and is arranged on the side surface of the horizontal rotating box body;
the speed reducer and the stepping motor are arranged in the horizontal rotating box body and are used for directly driving the single-arm probe to rotate in the horizontal and pitching directions;
the zero position positioning device is arranged in the horizontal rotating box body and used for positioning the zero position of the horizontal rotating box body.
3. The mobile unstable platform based solaphotometer of claim 1, wherein the large field of view fisheye imaging system comprises a ball-type attenuator, a fisheye lens, and a first digital CCD image sensor.
4. The mobile unstable platform based solaphotometer of claim 3, wherein the fisheye lens has a field angle greater than 180 °.
5. The mobile unstable platform based sun photometer of claim 1, wherein the imaging light cylinder comprises an attenuating filter, a first lens and a second digital CCD image sensor, and the solar spot within the small field of view is imaged by the lens imaging onto the second digital CCD image sensor.
6. The mobile unstable platform-based solar photometer of claim 5, wherein the imaging light cylinder is blackened on its inner wall, has an opening at its front end and an attenuating filter embedded therein, and has a first lens therein, and has an external thread at its rear end, and the second digital CCD image sensor is located inside the one-arm probe and has a lens ring with an internal thread connected to the external thread at the rear end of the imaging light cylinder.
7. The mobile unsteady platform-based solar photometer of claim 1, wherein the measuring optics cylinder comprises a dust-proof window mirror, a field stop group, and a lens, wherein the field stop for eliminating stray light and the lens are used for eliminating stray light after solar radiation passes through the dust-proof window mirror.
8. The sun photometer based on the mobile unstable platform of claim 1, wherein the single-arm probe further comprises a filter wheel, a filter wheel motor and a photoelectric detector, and the filter wheel is provided with a plurality of optical filters with different wave bands;
during measurement, the filter wheel motor rotates to enable the filters with different wave bands to be aligned to the detection light path, the photoelectric detector obtains the solar spectrum with 400-1100 nm discrete wave bands, and the photoelectric detector transmits radiation signals to the industrial personal computer through the lower computer control system.
9. The mobile unstable platform-based solar photometer of claim 8, wherein the filter wheel is uniformly distributed with a plurality of filters and a black opaque block for background measurement, and is driven by a filter wheel motor, and the positioning and switching of the filters on the rotating disk are automatically controlled by a program, and the spectrum measurement of each waveband is completed by one rotation of the rotating disk of the filter wheel.
10. The mobile unstable platform based sun photometer of claim 1, further comprising a GPS module for obtaining real-time latitude and longitude information, aiding data tracking and data inversion when the sun photometer is moving.
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