A Differential Pressure Sensor Based on Optical Fiber Point Sensor

A differential pressure sensor, sensor technology, applied in fluid pressure measurement using optical methods, pressure difference measurement between multiple valves, instruments, etc., can solve problems such as inability to apply high static pressure, high temperature environment, etc. effect of damage, improved measurement accuracy, and high sensitivity

Active Publication Date: 2022-01-04
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a differential pressure sensor based on an optical fiber point sensor to solve the problem that the prior art cannot be applied to high static pressure and high temperature environments

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  • A Differential Pressure Sensor Based on Optical Fiber Point Sensor
  • A Differential Pressure Sensor Based on Optical Fiber Point Sensor
  • A Differential Pressure Sensor Based on Optical Fiber Point Sensor

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Embodiment Construction

[0026] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

[0027] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0028] Such as Figure 1-Figure 3 Commonly shown, a differential pressure sensor based on a fiber optic point sensor, including a housing 1, a first pressure introduction tube 2, a second pressure introduction tube 3, a first fiber optic point sensor 11, a second fiber optic point sensor 12 , a fir...

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Abstract

The invention discloses a differential pressure sensor based on an optical fiber point sensor. The first limit diaphragm and the second limit diaphragm are provided to ensure that the pressure sensitive diaphragm will not be irreversibly The deformation of the pressure-sensitive diaphragm is not hindered within the measuring range. In the present invention, the fixed points of the pressure-sensitive diaphragm, the first arc-shaped metal sheet and the second arc-shaped metal sheet are at the same position, which avoids measurement errors caused by deformation of the casing and improves measurement accuracy. The invention converts the pressure difference into the change of the characteristic value of the optical fiber point sensor by setting the first optical fiber point sensor and the second optical fiber point sensor, and has the characteristics of high sensitivity and long-term stability. Because the present invention is provided with a limiting diaphragm, the material that can be used for the pressure-sensing diaphragm is not limited to chromium-nickel alloy, and the material of the pressure-sensing diaphragm can be selected according to the use environment, and can be suitable for high static pressure and high temperature environments.

Description

technical field [0001] The invention belongs to the field of fluid pressure testing, in particular to a differential pressure sensor based on an optical fiber point sensor. Background technique [0002] Differential pressure sensors are an important part of process control systems. The flow rate is measured by the pressure difference generated when flowing through the throttling device. It is widely used in the measurement, control and regulation of fluid flow in the production process of petroleum, chemical industry, metallurgy, textile, electric power, navigation, aviation, electromechanical and other industrial sectors. The differential pressure sensors commonly used in the prior art are electronic (resistive, voltage, etc.), which have many application limitations, are susceptible to electromagnetic interference, have too many communication and power supply cables, and cannot tolerate high static pressure and high temperature environments, etc. . Contents of the inven...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L13/00G01L19/00G01L19/06G01L11/02
CPCG01L13/00G01L19/00G01L19/06G01L11/025
Inventor 冉曾令肖彦波青先国何正熙朱加良何鹏徐思捷向美琼吴茜陈静徐涛
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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