Flow control valves are essential equipment for the oil industry. They are responsible for regulating the flow of oil and gas, ensuring the safe and efficient running of operations. However, measuring the position of these valves is a challenge, as they operate in aggressive environments with high pressures and temperatures.
The invention is an optic fiber position transducer that uses a magnetostrictive material. This material expands or contracts in response to a magnetic field and the transducer uses this property to measure the displacement of the choke valve.
The transducer consists of a magnetic or electromagnetic element, one or more pieces of magnetostrictive material, Bragg grating sensors and a rod that is not permeable to magnetic fields. When the magnetic or electromagnetic element moves, it causes a deformation in the piece of magnetostrictive material. This deformation is detected by Bragg grating sensors, which measure the wavelength of the reflected light. The change in wavelength is related to the displacement of the magnetic or electromagnetic element.
Patent title:
Optic fiber position transducer resistant to high pressures and temperatures
Deposit Number:
PI 0501790 4
Pontifical Catholic University of Rio de Janeiro – PUC-Rio
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