Flow velocity sensor probe and flow velocity measuring system

A flow velocity sensor and flow velocity measurement technology, which is applied in the direction of fluid velocity measurement, velocity/acceleration/shock measurement, measuring devices, etc., can solve the problems of affecting the service life, the optical fiber has no specific protection measures, and is easy to break and break, so as to achieve structural stability , small size, good mechanical properties

Active Publication Date: 2017-09-19
LASER RES INST OF SHANDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The optical fiber flow rate sensor provided by the above two inventions is only used for monitoring in the pipeline, and the optical fiber has no specific protection measures, and it is easy to break and affect the service life

Method used

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  • Flow velocity sensor probe and flow velocity measuring system
  • Flow velocity sensor probe and flow velocity measuring system
  • Flow velocity sensor probe and flow velocity measuring system

Examples

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Effect test

no. 1 example

[0041] Please refer to figure 1 , the present embodiment provides a flow velocity sensor probe 1000, which includes a flow velocity measurement segment optical fiber 120, a measurement optical fiber sleeve 100, a temperature compensation segment optical fiber 420, a compensation optical fiber packaging structure 400 and an adiabatic connection structure. The measurement optical fiber sleeve 100 is sleeved on the outside of the flow velocity measurement section optical fiber 120, the temperature compensation section optical fiber 420 is packaged inside the compensation optical fiber packaging structure 400, the measurement optical fiber sleeve 100 and the compensation optical fiber packaging The structures 400 are respectively fixedly connected to the adiabatic connection structures, and the temperature compensating section optical fiber 420 passes through the adiabatic connection structure and is coupled to the flow velocity measurement section optical fiber 120 . In this embo...

no. 2 example

[0059] Please refer to Figure 8 , the present embodiment provides a flow velocity measurement system 2000, which includes the flow velocity sensor probe 1000 and the laser 600 described in the first embodiment above, the laser 600 and the temperature compensation segment optical fiber 420 in the flow velocity sensor probe 1000 coupling. In this embodiment, the laser 600 is connected to the flow rate sensor probe 1000 through the optical cable connector 500 , and the pumping light is input through the tail fiber of the optical fiber 420 of the temperature compensation section.

[0060] The specific working principle is that the pump light of a specific wavelength emitted by the laser 600 enters the flow rate measurement section fiber 120 (doped fiber) through the temperature compensation fiber 420 (single-mode fiber), because the doped fiber absorbs the laser energy and will radiate Heat is generated, and the measuring fiber optic sleeve 100 is heated to form a specific tempe...

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Abstract

The invention provides a flow velocity sensor probe and a flow velocity measuring system, relating to the field of flow velocity measurement. The flow velocity sensor probe includes a flow velocity measurement segment optical fiber, a measurement optical fiber sleeve pipe, a temperature compensation segment optical fiber, a compensation optical fiber package structure and a heat insulation connection structure. The measurement optical fiber sleeve pipe sleeves the outer side of the flow velocity measurement segment optical fiber. The temperature compensation segment optical fiber is packaged at the inner side of the compensation optical fiber package structure. The measurement optical fiber sleeve pipe and the compensation optical fiber package structure are fixedly connected to the heat insulation connection structure. The temperature compensation segment optical fiber goes through the heat insulation connection structure to be coupled with the flow velocity measurement segment optical fiber. The heat insulation connection structure is made of a heat insulation material. Compared with the prior art, according to the flow velocity sensor probe provided by the invention, the measurement segment optical fiber and the compensation segment optical fiber are separated by the heat insulation connection structure, the temperature fields of the two optical fibers do not interfere with each other, the accuracy and precision of a measurement result are improved, the overall structure is stable, the mechanical property is good, and the flow velocity sensor probe is suitable for many flow velocity monitoring sites.

Description

technical field [0001] The invention relates to the field of flow velocity measurement, in particular to a flow velocity sensor probe and a flow velocity measurement system. Background technique [0002] Flow velocity measurement plays a pivotal role in petrochemical, biomedical, energy measurement, environmental monitoring and other fields. Hot-wire flow velocity sensors have the characteristics of high measurement accuracy and wide range, and are widely used in many fields. However, it is charged by itself, and there are potential safety hazards in the application of flammable and explosive occasions. In view of the above phenomena, along with the development of fiber optic technology, fiber optic thermal velocity flow sensors have begun to receive widespread attention. [0003] For the research on fiber optic thermal velocity flow sensor, China Patent Application No. 201210016727.X, an invention patent named "Hot Wire Flow Sensor Device Based on Fiber Bragg Grating", pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P5/26
Inventor 李振王纪强赵林侯墨语董果风刘统玉
Owner LASER RES INST OF SHANDONG ACAD OF SCI
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