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In a laboratory environment, in order to test the attitude recognition capability and accuracy of the satellite attitude sensor—the infrared Earth sensor—the infrared Earth simulator is fixed on a five-axis turntable to enable multi-angle testing. In the past, the temperature control system of the Earth simulator was water cooled, which not only af...
Citations
... A temperature sensor is a device capable of detecting ambient temperature and converting it into a usable signal, and it is widely employed in industries such as industrial automation, healthcare, environmental monitoring, and aerospace. With the advancement of technology, modern temperature sensors have diversified in type and technique, encompassing resistance temperature detectors (RTDs) [1], semiconductor temperature sensors [2], infrared sensors [3], and more, each relying on different operating principles to measure temperature. Precision, sensitivity, and stability are the main focuses of modern temperature sensor development. ...
This paper presents a method for cholesteric liquid crystal (CLC)-filled miniature optical fiber liquid crystal probes to achieve highly sensitive temperature detection. Due to the periodic structure of CLC, it can function as a resonant microcavity and generate laser light under the gain of the dye, with the laser wavelength shifting with temperature. The temperature response characteristics of several CLCs were studied by observing the variation of CLC laser wavelength with temperature. In order to further improve temperature sensitivity, this paper used a method of linear superimposing the sensitivity of two liquid crystals. Finally, the sensitivity of the fiber-optic temperature sensing probe produced in this paper reached 7.41 nm/°C. This high sensitivity was achieved by linearly combining the temperature sensitivities of CLC2 (2.77 nm/°C) and CLC4 (−4.64 nm/°C).
