A measurement method of solar absolute radiometer based on pi controller
A technology of absolute radiation and measurement method, which is applied in the field of solar irradiance measurement, can solve problems such as accuracy requirements, and achieve the effects of improving measurement accuracy, avoiding measurement accuracy degradation, and shortening adjustment time
Active Publication Date: 2020-11-03
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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The measurement method of the solar absolute radiometer based on the PI controller provided by the embodiment of the present invention uses the PI controller to maintain the temperature balance of the cavity, and solves the problem of the blackbody cavity in the measurement method of the existing total solar irradiance monitor (TSIM). The problem of mathematical model accuracy requirements, and then improve the measurement accuracy
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[0033] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.
[0034] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present invention and the above drawings are used to distinguish similar objects and not necessarily Describe a specific order or sequence. It is to be understood that the terms so used are interchangeable under appropriate cir...
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The embodiment of the invention discloses a measurement method of a solar absolute radiometer based on a PI controller. The method includes obtaining the temperature step response curve of the blackbody cavity and constructing a mathematical model of the blackbody cavity; using simulation software to simulate and optimize the parameters of the PI controller; in the radiation observation stage, using the PI controller to adjust the electric power of the blackbody cavity until the cavity The temperature is adjusted back to the thermal equilibrium state to obtain the first equilibrium temperature and the compensation electric power; in the electrical calibration stage, the PI controller is used to adjust the electric power of the blackbody cavity until the cavity temperature is adjusted back to the thermal equilibrium state, thereby obtaining the second equilibrium temperature and electrical calibration power . This method uses the PI controller to adjust the electric power of the black body cavity, shortens the adjustment time of the switch shutter moment, shortens the measurement cycle of the total solar irradiance monitor, and avoids the problem of the measurement calculation formula in the traditional measurement method due to photoelectric inequalities. The problem of decreased measurement accuracy.
Description
technical field [0001] The invention relates to the technical field of solar irradiance measurement, in particular to a measurement method of a solar absolute radiometer based on a PI controller. Background technique [0002] The total solar irradiance (Total Solar Irradiance, TSI) can calculate the solar constant, which is of great significance to the research of solar physics and upper atmosphere. At present, the total solar irradiance is mainly measured by the solar irradiance absolute radiometer. The solar irradiance radiometer is an electrical alternative to radiometers with measurements directly traceable to electrical currents in the International System of Units (SI). The core detector of the solar irradiance absolute radiometer is a black body cavity, and the optical power is reflected and absorbed many times in the black body cavity, so that the cavity temperature reaches a new equilibrium state. Based on the measurement principle of electrical substitution, the ...
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IPC IPC(8): G01J1/42
CPCG01J1/42G01J2001/4266
Inventor 衣小龙贾平叶新方伟
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI