How does fiber optic temperature sensing technology work?-INNO

1. How does fiber optic temperature sensing technology work?

FJINNO’s fiber optic temperature sensing technology works on the principle of fluorescence decay. The system sends light pulses through an optical fiber to a phosphor sensor tip installed at the measurement point. The phosphor material absorbs this light and emits fluorescence. When the excitation light is switched off, the fluorescence continues to emit but gradually decays.

The key scientific principle is that this decay time (durée de vie de la fluorescence) varies precisely with temperature—higher temperatures result in shorter decay times. By accurately measuring this decay time, our system determines the exact temperature at the sensor location. This measurement principle depends only on the time characteristic, not signal intensity, making it immune to fiber bending, pertes de connecteur, ou variations de la source lumineuse.

2. What makes fiber optic sensors immune to electromagnetic interference?

FJINNO capteurs à fibre optique sont totalement insensibles aux interférences électromagnétiques (EMI) due to their all-optical design with no metallic components. The sensors consist of:

Pure quartz optical fibers that transmit light signals without using electrical conductors
Non-metallic phosphor sensing elements that operate purely on optical principles
Dielectric materials for all sensor construction including protective coverings

Unlike conventional sensors that use electrical signals (which can be disturbed by magnetic fields), notre capteurs à fibre optique transmit only light signals. Even in extreme environments with high-voltage equipment, powerful electromagnetic fields, or electrical transients, the measurement remains completely unaffected. This immunity is particularly crucial in electrical equipment applications where intense magnetic les champs provenant de courants élevés peuvent provoquer des erreurs de mesure importantes dans les capteurs conventionnels.

3. Quelle est la plage de mesure de température des capteurs à fibre optique FJINNO?

La norme FJINNO les capteurs de température à fibre optique offrent une mesure de température plage de -40°C à +260°C avec une précision de ±1°C et une résolution de 0,1°C. Cette gamme couvre la grande majorité des applications de surveillance des équipements électriques, des températures ambiantes dans les régions froides aux températures de point chaud les plus élevées généralement rencontrées dans les équipements électriques en cas de panne.

Pour les applications spécialisées, nous proposons des solutions sur mesure avec des plages de température étendues. Our research and development team can design custom sensors for applications requiring measurements up to 300°C or higher while maintaining high accuracy. Each sensor is individually calibrated across its entire operating range to ensure precision measurements throughout its lifetime.

4. What is the accuracy and response time of your sensors?

FJINNO capteurs de température à fibre optique offer industry-leading performance specifications:

Précision: ±1°C across the entire measurement range (higher accuracy options available for specialized applications)
Résolution: 0.1°C allowing detection of minute temperature changes
Temps de réponse: Moins que 1 second to full reading, significantly faster than conventional temperature sensors
Measurement cycle: Typically 200-500ms per channel, enabling near real-time monitoring of multiple points

The fast response time is particularly valuable for detecting rapidly developing thermal events in electrical equipment. Unlike conventional sensors that may have significant thermal mass and slow response, notre fiber optic sensors can detect temperature changes almost immediately, providing crucial early warning of developing issues.