Sensores de temperatura de fibra óptica INNO ,sistemas de monitoramento de temperatura.
Fiber optic sensing online monitoring technology has a series of advantages such as anti electromagnetic interference, longa vida útil, tamanho pequeno, alta sensibilidade, convenient photoelectric or electro-optical conversion, and multiplexing.
The fluorescent material used in fluorescent optical fibers emits fluorescent signals when exposed to excitation light. By utilizing the characteristics of fluorescent materials such as excitation spectrum, emission spectrum, and fluorescence lifetime, partial discharge monitoring and temperature monitoring of power equipment can be achieved. In partial discharge, the low light generated by partial discharge causes the fluorescent fiber to emit fluorescent signals. By receiving the fluorescent signals and performing photoelectric conversion, the partial discharge signals can be analyzed and processed.
In temperature monitoring, the most commonly used type is the fluorescence afterglow lifetime temperature sensor. The fluorescence afterglow begins to decay after the light excitation is removed, and the afterglow lifetime depends on the temperature of the object being measured. Temperature is an important operating parameter of power equipment and one of the most direct manifestations of equipment failure. The research hotspot of online monitoring of power systems is to obtain the operating status of power equipment by monitoring its temperature information.
Fiber optic temperature measurement methods are divided into point temperature monitoring and distributed temperature monitoring:
1. Point based temperature monitoring includes fiber optic grating temperature monitoring e monitoramento de temperatura de fibra óptica fluorescente, mainly used to monitor key abnormal parts in power equipment, incluindo enrolamentos do transformador, juntas de manobra, disjuntores, etc.;
2. Monitoramento distribuído de temperatura refere-se ao uso de sensores de fibra óptica distribuídos dispersos para monitoramento, usado principalmente para medição abrangente de temperatura da linha de transmissão.
Fibra fluorescente sensores ópticos também pode ser usado para medir a temperatura interna de transformadores. Termômetros fluorescentes de fibra óptica são usados para enrolamentos de transformadores. A sonda do material fluorescente é inserida na posição dentro do transformador que precisa ser medida, e a temperatura é detectada pela relação entre o tempo de vida da fluorescência e a temperatura. Comparado com sensores de temperatura do tipo intensidade de fluorescência, este método reduz significativamente o impacto da estabilidade da fonte de luz.
A medição de temperatura baseada em pontos, incluindo sensores de temperatura de grade de fibra óptica e sensores de temperatura de fibra óptica fluorescentes, is accurate enough to measure to a certain point, suitable for monitoring key parts of power equipment, and is not limited by the power of the light source. It is compact in size and has high sensitivity.
Sensor de temperatura de fibra óptica, Sistema de monitoramento inteligente, Fabricante distribuído de fibra óptica na China
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