Fiber type osmotic pressure sensor with fine-tuning device and automatic temperature compensation

Abstract

The present invention discloses a fiber type osmotic pressure sensor with a fine-tuning device and automatic temperature compensation. The device comprises a protection shell and a permeable stone housing. The protection shell is equipped with a fiber fixed substrate. One end of the fiber fixed substrate is a rigid structure, and the other end of the fiber fixed substrate is an elastic structure. A temperature optical fiber is fixed at one end of the rigid structure, a pressure fiber grating is fixed at one end of the elastic structure, the connection part of the fiber fixed substrate and the pressure fiber grating is equipped with an elastic adjustment device, and the external part of the pressure fiber grating is the elastic film of the tail end of the fiber fixed substrate. The fiber type osmotic pressure sensor has the advantages of strong anti-interference ability, high sensitivity, high precision and stable performance, the automatic temperature compensation can be achieved, and the temperature and liquid pressure can be measured at the same time. The linear performance of the elastic film is good, good deformation can be generated under small pressure, and the sensitivity is excellent. The fiber type osmotic pressure sensor has a good protection structure and good waterproof and moisture-proof performance and can be applied to a harsh environment.

Description

technical field [0001] The invention belongs to the technical field of osmotic pressure sensors, in particular to an optical fiber osmotic pressure sensor with a fine-tuning device and self-temperature compensation. Background technique [0002] The osmotic pressure sensor is used to monitor the seepage water pressure of geotechnical engineering and other concrete buildings. It is suitable for long-term buried in hydraulic buildings or other buildings and their foundations, or installed in piezometric tubes to measure the inside and foundation of structures. osmotic water pressure. It can also be used to measure the water level of reservoirs or groundwater levels of slopes. Traditionally commonly used electrical sensors are vulnerable to lightning strikes when used in the field, and are severely disturbed in complex electromagnetic environments and cannot work normally. At the same time, the measurement signal is not easy to transmit over long distances. The fiber-optic pre...

AI Technical Summary

Problems solved by technology

It can also be used to measure the water level of the reservoir or the groundwater level of the slope. The traditional commonly used electrical sensors are vulnerable to lightning strikes when used in the field, and they are seriously disturbed in complex electromagnetic environments and cannot work normally. At the same time, the measurement signal is not easy to transmit over long distances.

Images