Abstract
In this paper, a differential pressure sensor with magnetic transfer is proposed, in which the non-electric measurement based on the fiber Bragg grating (FBG) with the position limiting mechanism is implemented without the direct contact of the sensing unit with the measuring fluid. The test shows that the designed sensor is effective for measuring differential pressure in the range of 0~10 kPa with a sensitivity of 0.0112 nm/kPa, which can be used in environments with high temperature, strong corrosion and high overload measurements.
Highlights
The differential pressure sensor has been widely used in differential pressure signal measurements of fluid
fiber Bragg grating (FBG) with with the the fluid fluid to to be be measured, measured, we we propose propose aa sensor sensor structure structure with with caused aa differential pressure to the wavelength shift of the FBG; and a limiting mechanism which is used for magnetic transfer mechanism
In order solve to thissolve problem, Usually, noteasy easy to separate the measured fluid. Intoorder this we introduced a special mechanism with magnetic transfer to isolate the from the measured fluid, problem, we introduced a special mechanism with magnetic transfer to isolate the FBG from the where three identical magnetsstrong are used, described as A,described
Summary
The differential pressure sensor has been widely used in differential pressure signal measurements of fluid. When the fluid flows through the point to be measured, the tiny pressure difference between the two sampling points can be measured by the sensor [1]. With the development of sensing technology, FBG has become one of the candidates to replace those traditional electronic sensors [2,3,4,5]. In order to guarantee the sensitivity and durability of the sensor, special approaches should be taken in real measurement environments with high temperatures, high pressures, overload [7,8] and corrosion [9,10].
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