A dual-piston symmetrical damping optical fiber differential pressure sensor
A differential pressure sensor, damping technology, applied in the field of sensor structure, can solve problems such as low practicability, unsuitable differential pressure sensor, and inability to meet the requirements of differential pressure measurement.
Active Publication Date: 2018-05-11
DONGXING HUAHONG OPTICAL TECH
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Problems solved by technology
[0003] The purpose of the present invention is to provide a dual-piston symmetrical damping optical fiber differential pressure sensor to solve the problem that the existing differential pressure sensor is not suitable for many occasions, has poor practicability, and cannot meet the actual pressure differential measurement requirements.
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[0082] refer to figure 1 and figure 2 , this embodiment provides a dual-piston symmetrical damping optical fiber differential pressure sensor, including:
[0083] Sensor probe 1, photodetector 2, signal processor 3, light source 4, Y-coupler 5 and optical fiber 6.
[0084]The sensor probe 1 includes a housing 11, the housing 11 is a cylindrical structure, the material of the piston 14 is hard alloy, the two ends of the housing 11 are respectively sealed with end caps 12, and the middle position inside the housing 11 is provided with a The interior of the housing 11 is hermetically separated into a partition 13 that is divided into two left and right chambers, and the partition 13 and the housing 11 are of an integrated structure. The housing 11 on both sides of the partition 13 is respectively provided with fluid through holes 111, and the partition 13 A piston 14 is respectively sealed and slidably arranged in the chambers on both sides, a sealing ring 19 is arranged betwe...
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The invention provides a dual-piston symmetrical damping optical fiber differential pressure sensor. The sensor probe includes a shell, which is a cylindrical structure. The inside of the body is sealed and divided into two left and right chambers by a partition. Fluid through holes are respectively set on the shells on both sides of the partition. Pistons are arranged in the chambers on both sides of the partition. A spring is also arranged between the piston and the end cover. The end cover is provided with a probe placement hole, and the probe placement hole is perpendicular to the piston, each probe placement hole is provided with a fiber optic probe, and a reflective sheet is provided on the position facing the fiber optic probe on the piston, and the upper housing of the fiber optic probe has two The output optical fiber at the end is respectively connected with a photodetector, and the two photodetectors are respectively connected with a signal processor. In order to solve the problem that the existing differential pressure sensor is not applicable in many occasions, has poor practicability, and cannot meet the requirements of actual differential pressure measurement. The invention belongs to the field of differential pressure detection.
Description
technical field [0001] The invention relates to a sensor structure and belongs to the technical field of optical fiber sensing. Background technique [0002] Differential pressure sensors are widely used in industry and are mainly used to measure the pressure difference of equipment, components or fluids at different positions. They are widely used in detection fields such as tail pressure difference, gas flow, liquid level, and clean room monitoring. Nowadays, differential pressure sensors using different principles have appeared, such as resistive, capacitive, inductive, throttle, magnetic liquid, MEMS, etc. Among them, resistive and capacitive are more common, and other types are not practical due to Strong, limited or still in the concept stage, and has not been promoted, but resistive and capacitive differential pressure sensors also have their own shortcomings, and cannot be well competent in many occasions. Contents of the invention [0003] The purpose of the pres...
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IPC IPC(8): G01L13/00
Inventor 胡浩钟丽琼陈明强
Owner DONGXING HUAHONG OPTICAL TECH