Pressure sensing method and sensor probe utilizing method

Abstract

The invention provides a pressure sensing method and a sensor probe utilizing the method. The pressure sensing method is characterized in that one surface of a piston arranged in a sliding manner is impacted by a pressure generated by a fluid, the piston slides, the other surface of the piston is provided with a reflective mirror, incident optical fibers in an optical fiber probe irradiate the reflective mirror, and receiving optical fibers in the optical fiber probe receive reflective light; and after the piston moves, the distance between the optical fiber probe and the reflective mirror changes, the reflective light also changes, the pressure change of an elastic membrane caused by the fluid is judged and detected by detecting the change of output light intensity of the receiving optical fibers, and the other surface of the piston is provided with a spring to limit the moving amount of the piston. The pressure sensing method and the sensor probe utilizing the method solve the problems that pressure measurement and calculation by using an existing elastic membrane sensor is relatively tedious, the measuring precision is not high, the existing sensor is relatively poor in stability, and the usage lifetime is relatively short. The invention belongs to the field of pressure detection.

Description

technical field [0001] The invention relates to a sensing method and a sensor probe structure, belonging to the technical field of optical fiber sensing. Background technique [0002] Existing optical fiber pressure sensors for measuring fluid pressure all use elastic diaphragms as pressure sensing devices. However, the fluid pressure contacted by each part of the elastic diaphragm is generally unevenly distributed, and there will be a certain pressure difference more or less, making the elastic diaphragm The uneven deformation of each part of the film affects the measurement accuracy of the sensor. The elastic diaphragm deforms in an arc shape when deformed. The measurement and calculation of the pressure that causes the arc deformation is cumbersome. At the same time, the elastic diaphragm is easily disturbed by the outside world. Or damaged, the performance of the sensor probe is unstable, and the service life is short. Contents of the invention [0003] The purpose of...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a pressure sensing method and a sensor probe using the method, so as to solve the problem that the measurement and calculation of the pressure by the existing elastic diaphragm sensor are complicated, the measurement accuracy is not high, and the performance of the existing sensor is stable. Poor performance, short service life, etc.

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