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Optical fiber FBG sensor and system for measuring pressure of high-energy pipeline of nuclear power device

A high-energy pipeline and measurement system technology, applied in the field of pipeline pressure measurement, can solve the problems of large volume, unreliable performance, and inability to achieve distributed measurement, and achieve the effect of small size, strong anti-electromagnetic interference ability, and saving layout space.

Pending Publication Date: 2021-12-17
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide an optical fiber FBG sensor for pressure measurement of high-energy pipelines in nuclear power plants, so as to solve the problems of unreliable performance, large volume and inability to realize distributed measurement caused by the existing pressure transmitters

Method used

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  • Optical fiber FBG sensor and system for measuring pressure of high-energy pipeline of nuclear power device
  • Optical fiber FBG sensor and system for measuring pressure of high-energy pipeline of nuclear power device
  • Optical fiber FBG sensor and system for measuring pressure of high-energy pipeline of nuclear power device

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Embodiment 1

[0057] Such as Figure 1-Figure 2 As shown, the optical fiber FBG sensor used for pressure measurement of high-energy pipelines in nuclear power plants includes a diaphragm 7, a capsule 8, a sealing part 10 of the capsule, a pressure-sensitive FBG optical fiber 6 and a temperature-sensitive FBG optical fiber 9;

[0058] The diaphragm 7 and the bellows sealing portion 10 are respectively arranged at both ends of the bellows 8 for sealing the bellows 8;

[0059] The pressure-sensitive FBG optical fiber 6 is placed in the bellows 8 and arranged on the diaphragm 7, the temperature-sensitive FBG optical fiber 9 is embedded in the sealing part 10 of the bellows, the pressure-sensitive FBG optical fiber 6 and the temperature-sensitive FBG optical fiber 9 After passing through the sealing part 10 of the bellows, they merge to form the transmission optical cable 4 .

[0060] In the embodiment, the pressure-sensitive FBG optical fiber 6 and the temperature-sensitive FBG optical fiber 9...

Embodiment 2

[0066] Such as Figure 1-Figure 2 As shown, a nuclear power plant high-energy pipeline pressure measurement system includes a sensor 3, a mechanical seal structure 2, a transmission optical cable 4 and a demodulator 5;

[0067] Described sensor 3 is the optical fiber FBG sensor described in embodiment 1;

[0068] The sensor 3 is installed on the side wall of the high-energy pipeline 1 through the mechanical seal structure 2, and the diaphragm 7 of the sensor 3 extends into the high-energy pipeline 1 to contact with the coolant medium;

[0069] The sensor 3 is electrically connected to the demodulator 5 through the transmission optical cable 4 .

[0070] In this embodiment; the connection mode between the mechanical seal structure 2 and the high-energy pipeline 1 is sealing thread and sealing welding, which can effectively ensure that the high-pressure medium will not flow from the position of the sensor 3 of the high-energy pipeline 1 when the nuclear power plant is running. ...

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Abstract

The invention discloses an optical fiber FBG sensor and system for measuring the pressure of a high-energy pipeline of a nuclear power device. The optical fiber FBG sensor comprises a diaphragm, a diaphragm capsule, a diaphragm capsule sealing part, a pressure sensing FBG optical fiber and a temperature sensing FBG optical fiber; the diaphragm and the diaphragm capsule sealing part are respectively arranged at two ends of the diaphragm capsule and are used for sealing the diaphragm capsule; the pressure sensing FBG optical fiber is arranged in the diaphragm capsule and arranged on the diaphragm, the temperature sensing FBG optical fiber is embedded in the closed part of the diaphragm capsule, and the pressure sensing FBG optical fiber and the temperature sensing FBG optical fiber pass through the closed part of the diaphragm capsule and then converge to form a transmission optical cable. The optical fiber FBG sensor does not contain electronic components and has the advantage of long-term and reliable measurement performance, and measurement signals obtained by the optical fiber FBG sensor can be transmitted in a long distance, so that the optical fiber FBG sensor can be directly mounted on a high-energy pipeline nearby during use. And the plurality of fiber FBG sensors are converged to form the same path of signal to realize distributed measurement, and the whole fiber FBG sensor has few components, so that the whole size is relatively small.

Description

technical field [0001] The invention relates to the technical field of pipeline pressure measurement, in particular to an optical fiber FBG sensor and system for high-energy pipeline pressure measurement of nuclear power plants. Background technique [0002] In nuclear power plants, the high-energy pipeline pressure parameter is responsible for monitoring the normal operation of the high-energy pipeline. When the reactor is in normal, abnormal operation and accident conditions, this parameter can be used to judge the abnormal operation of the reactor in combination with other parameters. This parameter is used as the control parameter when starting the reactor, so in the nuclear power plant, this parameter is an important safety level parameter. In the traditional instrument control design, the pressure transmitter is used to realize the measurement of this parameter. There are two main solutions: [0003] 1) Integrated pressure transmitter, this type of sensor converts the...

Claims

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Application Information

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IPC IPC(8): G01L7/08G01L7/10G01K11/3206
CPCG01L7/086G01L7/106G01K11/3206
Inventor 何鹏何正熙朱加良徐涛向美琼徐思捷杨洪润青先国卢川杨洪刘松亚陈静李小芬李红霞吴茜朱毖微吕鑫王雪梅邓志光郑嵩华叶宇衡
Owner NUCLEAR POWER INSTITUTE OF CHINA
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