초록 ▼

An inexpensive, lightweight fiber optic micro-sensor that is suitable for applications which may require remote temperature sensing. The disclosed temperature sensor includes a phosphor material that, after receiving incident light stimulation, is adapted to emit phosphorescent radiation output sign

An inexpensive, lightweight fiber optic micro-sensor that is suitable for applications which may require remote temperature sensing. The disclosed temperature sensor includes a phosphor material that, after receiving incident light stimulation, is adapted to emit phosphorescent radiation output signals, the amplitude decay rate and wavelength of which are functions of the sensed temperature.

대표청구항 ▼

A pulse-width-modulated temperature sensor comprising: a source of light pulses, a first optical fiber, one end of said first optical fiber being positioned in proximity to said source of light pulses to receive light pulses therefrom, a supply of photoluminescent material which has an emission ampl

A pulse-width-modulated temperature sensor comprising: a source of light pulses, a first optical fiber, one end of said first optical fiber being positioned in proximity to said source of light pulses to receive light pulses therefrom, a supply of photoluminescent material which has an emission amplitude decay rate which is a function of a temperature to be sensed to which said phosphor is exposed, said phosphor being located in proximity to another end of said first optical fiber to receive light therefrom, photodetector means, a second optical fiber, one end of said second optical fiber being positioned to receive light from said photoluminescent material and another end of said second optical fiber being positioned to deliver light to said photodetector means, thereby to conduct output phosphorescent emission signals thereto, signal amplitude regulating means connected to an output terminal of said photodetector means to receive therefrom electrical signal representations of the output phosphorescent emission signals and to adjust an initial amplitude thereof to a common signal level, and pulse width detector means connected to an output terminal of said signal amplitude regulating means, said pulse width detector being connected to measure the width of the amplitude adjusted signal representations of the output emission signals, whereby the width of said adjusted signal representations is indicative of the temperature to be sensed.