Absolute radiometer and internal thermal structure of radiometer for solar irradiance calibration

A technology of absolute radiation and solar irradiation, which is applied in the field of on-orbit optical radiation measurement of remote sensors, can solve the problems that the contact between the absorption cavity and the thermopile cannot meet the accuracy requirements of the absolute radiometer and the processing technology is limited, and achieve the temperature acquisition method Reasonable design, lower time constant, weaken the effect of uneven distribution of epoxy resin glue

Active Publication Date: 2018-03-13
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention solves the problem that the existing thermal structure used on the absolute radiometer is a cavity structure with a positive conical cavity with a cylindrical side. Due to the limited processing technology, the contact between the absorption cavity and the thermopile cannot meet the accuracy requirements of the absolute radiometer. to provide an absolute radiometer for solar irradiance calibration and the internal thermal structure of the radiometer

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Absolute radiometer and internal thermal structure of radiometer for solar irradiance calibration
  • Absolute radiometer and internal thermal structure of radiometer for solar irradiance calibration

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0014] Specific implementation mode 1. Combination figure 1 and figure 2 Describe this embodiment, the absolute radiometer used for solar irradiance calibration, including: stray light diaphragm 6, motor 7, main diaphragm 8, internal thermal structure of radiometer, reference cavity 9, and 38-pin plug 10 . The internal thermal structure of the radiometer is as follows: figure 1 Including: pressing plate 1, polyimide gasket 2, thermopile 3, heat sink 4 and absorption chamber 5. The absorption cavity is embedded with a heating wire for electric heating in the light radiation area. In the electric heating stage, the cone cavity is heated by the electric heating wire to achieve the equivalent of light heating. The inside of the absorption cavity 5 is coated with a mirror reflective paint . The reference chamber 9 is connected back to back with the absorption chamber 5 . The heat sink 4 is used to package the reference cavity 9 and the absorption cavity 5; the absorption cavi...

specific Embodiment approach 2

[0016] Specific embodiment two, combine figure 1 In this embodiment, the internal thermal structure of the absolute radiometer used for solar irradiance calibration includes a pressing plate 1, a polyimide gasket 2, a thermopile 3, a heat sink 4, and an absorption cavity 5; the absorption cavity 5. A heating wire for electric heating is embedded in the light radiation area. In the electric heating stage, the electric heating wire is used to heat the absorption cavity 5 to achieve the equivalent of light heating. The interior of the absorption cavity 5 is coated with mirror-reflective paint. The reference chamber 9 is connected back to back with the absorption chamber 5 . The heat sink 4 is used to package the reference cavity 9 and the absorption cavity 5 ; the material of the pressing sheet 1 is aluminum, which plays a role of fixing the absorption cavity 5 . The material of the polyimide gasket 2 is polyimide, which plays a role of isolating heat transfer in this direction....

specific Embodiment approach 3

[0018] Specific embodiment three, this embodiment is the method for designing the thermal structure on the absolute radiometer for on-orbit solar irradiance calibration described in specific embodiment two, and this method is realized by the following steps:

[0019] 1. Establishing a 3D model: The engineering software Soliderworks is used for modeling, and the model is established by using the method of matrix rotation. The central angle α of the absorption cavity 5 is 30°, and the inner wall thickness is 0.1 mm. The outer diameter of the visor is determined according to the shape of the thermal link, that is, the radius of the visor should be similar to the radius of the thermopile ring, so that the visor can be better connected with the thermopile and maintain thermal contact. After the two-dimensional sketch is established, rotate along the centerline of the absorption cavity to obtain the required three-dimensional model of the absolute radiometer absorption cavity. Usin...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The absolute radiometer used for solar irradiance calibration and the internal thermal structure of the radiometer relate to the field of on-orbit optical radiation measurement of remote sensors, and solve the problem that the existing thermal structure used on the absolute radiometer is a positive conical cavity with a cylindrical side Due to the limited processing technology, the contact between the absorption cavity and the thermopile cannot meet the accuracy requirements of the absolute radiometer, including the internal thermal structure of the radiometer, including pressing sheets, polyimide gaskets, thermopiles, Heat sink and absorption cavity; the absorption cavity adopts a positive conical cavity structure with a brim, and the inner wall is coated with a specular reflection layer, and the central angle is 30°. The top surface of the thermopile is connected to the brim of the absorption cavity, and the bottom surface is connected to the heat sink, and the temperature difference between the heat sink and the absorption cavity is collected by using the thermoelectric effect. Because the joints of each component are connected by epoxy resin glue, the time constant of the optical radiation measurement experiment of the absolute radiometer is significantly reduced, and the usability of the solar irradiance on-orbit measurement data is improved.

Description

technical field [0001] The invention relates to the field of on-orbit optical radiation measurement of remote sensors, in particular to an absolute radiometer used for solar irradiance calibration and an internal thermal structure of the radiometer. Background technique [0002] The absolute radiometer is the main monitoring instrument for measuring total solar irradiance and has been developed for more than 50 years as a benchmark for optical radiation measurement. It belongs to the electric substitution radiometer. The principle is to reproduce the measured optical power with the equivalent electric power, and the power value of the electric power is the measured value of the optical power. During electrical substitution, the response time of absolute radiometer photoradiometric experiments is critical. For example, the solar irradiance absolute radiometer developed by Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences is equipped with ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): G01J1/04
CPCG01J1/04
Inventor 王凯唐潇方伟王玉鹏
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap