초록 ▼

The invention relates to a fiber optic temperature-measuring apparatus, based on the photo-luminescence of a solid material which is subjected to the temperature to be measured. The apparatus is characterized in that several sensors made of such a temperature-sensitive luminescent material are locat

The invention relates to a fiber optic temperature-measuring apparatus, based on the photo-luminescence of a solid material which is subjected to the temperature to be measured. The apparatus is characterized in that several sensors made of such a temperature-sensitive luminescent material are located in various places, each one being connected to a light-emitting diode via at least one optical fiber. Luminescent light emitted from each sensor is arranged to be supplied, via at least one separate optical fiber, possibly partially via the above-mentioned fiber and a fiber branch, to a receiver unit, common to all the sensors, the excitation light signal from each light-emitting diode being time-division multiplexed.

대표청구항 ▼

A fiber optic temperature-measuring apparatus comprising a plurality of different sensors made of a solid material having temperature-dependent photo-luminescent properties and each arranged in a different location where temperature is to be sensed, a source of incident light for each sensor which i

A fiber optic temperature-measuring apparatus comprising a plurality of different sensors made of a solid material having temperature-dependent photo-luminescent properties and each arranged in a different location where temperature is to be sensed, a source of incident light for each sensor which incident light is capable of making the respective sensor luminesce, an optical fiber for each source and respective sensor positioned to feed incident light from the former to the latter, a luminescent light receiving unit, a further optical fiber for each sensor, each said further optical fiber terminating adjacent to the receiving unit and positioned to receive luminescent light from the respective sensor, electronic measuring means to process the output of the receiving unit, and means to sequence the operation of said plurality of sources so that the incident light therefrom is time-division multiplexed.