A fiber optic pressure sensor and measuring method of measuring the pressure in the compressor

The present invention discloses an optical intensity grating hybrid fiber optic pressure sensor and measuring method for measuring the pressure in the compressor, the light intensity is irradiated perpendicularly to the elastic fiber strain gauge center, by the two receiving fiber it receives the reflected light, by two light-receiving optical fiber intensity ratio calculated offset distance piece elastic strain; fiber grating temperature fixed horizontally inside the cylindrical metal casing temperature measurements for temperature compensation. The present invention is employed as the elastic strain gauge sensitive elements, application of a non-contact optical intensity as a measuring element, this embodiment can effectively improve the accuracy of pressure measurements, and reduce the complexity of the installation of the received signal. At the same time the advantages, the present invention employs an optical fiber grating sensor directly measure the environment temperature, temperature compensation to achieve accurate measurement of the pressure by the full application of a simple optical fiber sensor structure, small size, light weight, high accuracy and anti-interference ability of .