RU94042214A - Fiber-interferential system of pressure measurement - Google Patents

Abstract

FIELD: measurement technology, fibre optics, interferometry. SUBSTANCE: invention may be used instrument pressure converters. Proposed fiber-interferential system of pressure measurement has radiation source, light guides, sensitive element, directional coupler, recorder. It differs from other known systems by insertion of amplitude-spectral modulator of optic radiation connected to radiation source composed of control unit and modulator of spectrum and amplitude modulator connected in series, output of the latter is output of amplitude-spectral modulator connected to directional coupler. One output of directional coupler is connected to recorder and the other one - through light guide to sensitive element. Sensitive element presents laminated structure of optically transparent materials forming holographic filter. Recorder has photodetector and frequency meter connected in series. Proposed design of fiber-interferential system of pressure measurement makes it possible to increase sensitivity and consequently precision of measurement with relative simplicity of system. Salient features of system are small dimensions and possibility of its usage in places difficult to access. EFFECT: simplified design, increased sensitivity and small dimensions. 1 cl, 5 dwg

Claims (1)

The invention relates to the field of measuring equipment, namely to fiber optics and interferometry, and can be used to create pressure transmitters. The proposed fiber interference pressure measurement system containing a radiation source, optical fibers, a sensitive element, a directional coupler, a recording device, differs from the known systems in that an amplitude-spectral optical radiation modulator connected to a radiation source is introduced into it, consisting of a control device and sequentially connected spectrum modulator and amplitude modulator, the output of which, which is the output of the amplitude spectral modulator, is connected to an open hole, one output of which is connected to a recording device, and the other through a light guide to a sensitive element, the sensitive element being a layered structure of optically transparent materials forming a holographic filter, and the recording device contains a photodetector and a frequency meter connected in series. The proposed design of a fiber-infectious pressure measurement system with relative simplicity allows to increase the sensitivity, and, consequently, the accuracy of the measurements. Distinctive features of the system are its small dimensions and the possibility of using it in hard-to-reach places.