Multiband infrared radiation automatic measuring system

Abstract

The invention provides a multiband infrared radiation automatic measuring system which can timely and automatically measure the infrared radiation characteristics of a measured object within different bands under complicated backgrounds and completely meets the requirements of long-term fault-free automatic observation radiation calibration measurement. The multiband infrared radiation automatic measuring system comprises a scanning device, a light splitting device, an infrared detection device and a control system/circuit, wherein the scanning device, the light splitting device and the infrared detection device are sequentially arranged on a light path in a radiation incident direction; and the scanning device comprises a protection window capable of rotating, a rotary reflecting mirror and a fixed double-blackbody correction assembly. In the invention, light spectrum light splitting and band modulating and canning technologies are used, and two medium and long wave detectors are selected to match with the technologies, thereby increasing measurable optical channels to effectively form the radiation calibration measurement to more long-wave and medium wave bands. Moreover, the radiation size required by a blackbody radiation cavity is compressed, the design and manufacture difficulties of the blackbodies are reduced, and the controllable precision is improved.

Description

technical field [0001] The invention relates to an infrared radiation measurement technology, in particular to a multi-band infrared radiation automatic measurement system, especially for real-time monitoring of seawater temperature. Background technique [0002] It is a relatively mature technology to measure the temperature of objects by infrared method. There are also many researches on various infrared radiometers at home and abroad. Accuracy generally varies with operating environment. [0003] When the infrared radiometer works in the field, it is easy to be affected by the following factors to affect the measurement accuracy. [0004] The response coefficient of the detector changes due to changes in the ambient temperature, or the aging of the detector chip and processing circuit; [0005] II The aging of the film layer of the infrared optical system leads to changes in the transmittance of the optical system; [0006] Changes in the temperature of the III radiome...

AI Technical Summary

Problems solved by technology

Therefore, a single band has certain limitations in satellite calibration measurement

[0009] At present, foreign infrared radiation measurement equipment has its own advantages and disadvantages according to different working principles. The equipment including multiple bands mainly includes M-AERI (3μm~18μm) as Fourier infrared spectrum radiation testing equipment, and AVHRR (3.8μm~10.6μm) as Infrared imaging radiation temperature measurement equipment, but these two instruments have complex structures and are expensive, and are not suitable for popularization and application under harsh conditions in the field; the French CE312 equipment is small in size, high in sensitivity, and easy to carry, but because it does not have a reference The measurement accuracy of blackbody usually changes with different working environments, and it also needs to be operated manually according to its temperature measurement principle, and automatic observation cannot be realized; ISAR is a specially developed seawater surface temperature observation device, which comes with two calibration blackbodies, which can realize Requirements for automatic observation of sea surface temperature, but it is only measured in the long wave band

At present, there is no similar measuring equipment in China that is suitable for measuring the radiation of objects in complex backgrounds under harsh conditions in the field. High-precision calibration equipment

Images