DEVICE TO MEASURE PRESSURE AND TEMPERATURE IN FLOW OF GAS AND/OR LIQUID AND BENCH FOR TESTING AND MEASUREMENT OF CHARACTERISTICS OF GAS TURBINE ENGINE OPERATION Russian patent published in 2015 - IPC G01L11/02 

FIELD: measurement equipment.

SUBSTANCE: device to measure pressure and temperature in a flow of gas and/or fluid comprises a sensor body, a membrane rigidly fixed to the end of the body, a fibre-optic light guide with a protective coating arranged in the body, at least one diffraction bragg grating, applied onto the fibre-optic light guide, and a fibre-optic cable fixed in the body and connected to a signal processing system. The device is equipped with a facility arranged at the end of the body at the side of the membrane for connection to a discharge device, at least with one structure with a surface relief in accordance with the bragg diffraction geometry arranged on the membrane surface inside the sensor body. The fibre-optic light guide is connected to the fibre-optic cable and is attached to the body and membrane to form a cavity under the membrane. At the same time at least one diffraction bragg grating applied onto the fibre-optic light guide is arranged outside the area of light guide fixation to the body. The signal processing system comprises the following components connected with the fibre-optic cable: an optic splitter, a semiconductor source of light, an optic spectrum analyser and a connected recorder.

EFFECT: increased accuracy.

8 cl, 5 dwg