Space calibration method based on accurate micro phase change fixed point black body model

A fixed-point, black-body technology, applied in the field of satellite earth observation, can solve the problems of difficult testing and accurate realization, and achieve the effect of ensuring the accuracy of the model

Active Publication Date: 2020-01-17
NAT INST OF METROLOGY CHINA
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Problems solved by technology

In particular, in orbit, the fixation method, ambient temperature, and temperature control method of the blackbody in the satellite may be very different from those in the ground experiment, and

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  • Space calibration method based on accurate micro phase change fixed point black body model
  • Space calibration method based on accurate micro phase change fixed point black body model
  • Space calibration method based on accurate micro phase change fixed point black body model

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Embodiment Construction

[0022] In order to facilitate the understanding of the present invention, the embodiments of the present invention will be described below in conjunction with the accompanying drawings. Those skilled in the art should understand that the following description is only for the convenience of explaining the invention, not as a specific limitation of its scope.

[0023] Space observation satellites usually use infrared radiometers to observe the ground, and obtain high-precision, high-spatial-resolution ground information through atmospheric radiation models. In the working process of the infrared radiation thermometer, it is necessary to convert the brightness signal into an electrical signal, and then use the interpolation method to establish the corresponding relationship between the detector voltage and the target temperature. For the sake of illustration, the parameters of the radiometer take the Miami2001 infrared radiometer as an example, and of course other types of infrare...

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Abstract

The invention provides a space calibration method based on an accurate micro phase change fixed point black body model. An accurate numerical model is utilized to calibrate a melting point temperatureof a micro phase change fixed point black body and a platinum resistance thermometer carried in the micro phase change fixed point black body so as to cope with the change of the melting point temperature of the black body caused by the change of experimental conditions. Firstly, an accurate numerical model is established according to a black body and a fixed structure; through radiation temperature optical path adjustment, the melting point temperature value of the fixed point black body is transmitted to the micro phase change fixed point black body, and accurate phase change temperature data of the micro phase change fixed point black body at a gallium point is obtained through an interpolation method; the model is corrected through the temperature data, so that the influence of roughcontact surfaces, gaps and inaccurate material parameters on the model is eliminated; and finally, calculating is performed by utilizing the correction model to obtain the melting point temperatures at different fixed points. The method can be applied to on-orbit satellites and other situations where standard temperature measurement cannot be carried out.

Description

technical field [0001] The invention relates to the technical field of satellite earth observation, in particular to a space calibration method based on an accurate miniature phase-transition fixed-point blackbody model. Background technique [0002] Earth observation is one of the most important application directions of satellite technology. A range of areas, including missile warning and battlefield assessment, play integral roles. [0003] Measuring long-term, accurate detection of ground information from space is a daunting task. In the space environment, the temperature measured by satellites will gradually deviate from the actual temperature. This problem not only seriously affects the accuracy and effective observation life of satellite observations, but also makes it difficult to establish an indisputable climate record for long-term trend prediction of climate models. In addition, there are measurement differences and related uncertainties in the uncalibrated obs...

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Application Information

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IPC IPC(8): G01K15/00G01J5/52
CPCG01K15/005G01J5/53
Inventor 郝小鹏司马瑞衡宋健
Owner NAT INST OF METROLOGY CHINA
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