Système de mesure de température par fibre optique électromagnétique anti-interférence micro-ondes

Introduction to Microwave Electromagnetic Fluorescence Fiber Temperature Measurement System

Microwave belongs to ultra-high frequency electromagnetic waves, which have strong electromagnetic fields. When using conventional temperature sensors (such as thermocouples, thermal resistors, etc.) pour mesurer la température, metal temperature probes and wires produce induced currents under the high-frequency electromagnetic field. Due to skin effect and eddy current effect, their own temperature rises, causing serious interference to temperature measurement, resulting in significant errors in temperature readings or unstable temperature measurement. Donc, the fluorescence fiber temperature measurement system independently developed by Fuzhou INNO is a non-interference temperature sensor in the microwave field. The microwave fiber optic temperature measurement system utilizes the characteristics of fiber optic fluorescence temperature measurement, which is immune to electromagnetic radiation fields, to accurately measure the temperature of the object to be heated in the microwave cavity in ultra-high frequency, strong electromagnetic field, and heavy interference environments; And accurate temperature measurement was achieved through the probe of the fluorescent temperature sensor. The fiber optic temperature measurement system is suitable for integrating single channel or multi-channel temperature measurement, and the fluorescent fiber optic temperature measurement device is particularly suitable for precise temperature measurement under environmental interference such as thermal therapy, electromagnetic, high-frequency, and microwave.

The fiber optic probe consists of three parts: ST connector, fiber optic cable, and end temperature sensing end. The ST connector is the connection part with the photoelectric module; Fiber optic cable is the transmission part, with quartz fiber inside. The quartz fiber has a coating and cladding on the outside, and a Teflon protective sleeve on the outermost part; The end temperature sensing end contains temperature sensing rare earth materials, which are used to generate optical signals containing temperature information; The optical fiber is resistant to high temperatures of 200 ℃ and has an outer diameter of 3mm. Long term bending radius of 13.2cm. Short term bending radius of 4.4cm. When the distance between the fiber optic lead and the ground is 0.4m, it can withstand a power frequency voltage of 100KV for a duration of 5 minutes.

Characteristics of Fluorescent Fiber Temperature Sensor for Microwave Electromagnetic Interference Environment

Fiber optic temperature sensors are inherently safe, resistant to strong electromagnetic interference, have good electrical insulation, stable performance, résistance à la corrosion, et longue durée de vie; High temperature measurement accuracy, wide temperature measurement range, and flexible configuration of temperature measurement channels; Installation facile, flexible networking, standardized data transmission, high cost-effectiveness, and stable quality; The preferred product for temperature monitoring of high-frequency and microwave equipment.

La mesure de la température par fibre optique fluorescente fait partie de la méthode de mesure de la température de type contact. Cet appareil permet de mesurer la température en fonction de la durée de vie de la rémanence de fluorescence. La substance fluorescente appliquée à l’extrémité de mesure de température à distance émettra l’énergie de fluorescence correspondante lorsqu’elle est stimulée par des longueurs d’onde spécifiques de la lumière. Après avoir supprimé l’excitation de longueurs d’onde spécifiques de la lumière, La rémanence de fluorescence commence à se décomposer. La durée de la rémanence de fluorescence dépend de la température de la substance fluorescente située sur la sonde de mesure de température, C’est, la température de la substance à mesurer. La sélection de l’excitation lumineuse de longueur d’onde spécifique est adaptée à la substance fluorescente sélectionnée, et la longueur d’onde d’excitation la plus efficace des différentes substances fluorescentes est différente. When choosing, it is important to focus on selecting the light wavelength that is most suitable for exciting fluorescent substances. The attenuation curve of fluorescent substances excited by light is usually in a single exponential form.

Practical Application Cases of Fiber Optic Temperature Measurement System in Microwave Electromagnetic Environment