Fiber grating strain and temperature simultaneously measuring sensor

A technology for measuring sensors and strain sensors, applied in the field of engineering structural strain and temperature measuring devices, can solve the problems of inability to meet the requirements of integration of structural monitoring sensors, complex wires, signal distortion, etc., and achieve strong anti-electromagnetic interference ability and long-term stability. Good performance and little impact on structure

Inactive Publication Date: 2009-09-23
SOUTHEAST UNIV
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  • Abstract
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Problems solved by technology

However, this type of sensor still has certain limitations in engineering applications, such as signal distortion due to electromagnetic interference, drift and creep during long-term use, and complex wires, etc.
There are also some strain or temperature sensors based on optical principles that can be used to measure the strain and temperature of structures, but they only measure a single physical quantity and cannot meet the requirements for the integration of structural monitoring sensors.

Method used

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  • Fiber grating strain and temperature simultaneously measuring sensor
  • Fiber grating strain and temperature simultaneously measuring sensor
  • Fiber grating strain and temperature simultaneously measuring sensor

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Embodiment Construction

[0018] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0019] Such as Figure 1 to Figure 4 As shown, the optical fiber grating strain of the present invention, the temperature simultaneously measuring sensor comprises the first pigtail 1; The first stainless steel tube 2; The first epoxy resin 3; The second pigtail 4; The third pigtail 5; The second stainless steel tube 6; the second epoxy resin 7; the first bare fiber grating 8; the third epoxy resin 9; the metal tube 10; the fourth epoxy resin 11; the second bare fiber grating 12, heat-conducting liquid 13; The tube 6 was cleaned and dried with alcohol and then fixed on the experimental platform. The coating layer was removed from the grating section of the first bare fiber grating 8 and wiped with absorbent cotton ball dipped in alcohol, and then passed through the second stainless steel tube 6 to form a first Pigtail 1 and the second pigtail 4, adjust...

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Abstract

The invention relates to a fiber grating strain and temperature simultaneously measuring sensor. A fiber grating strain sensor is formed by utilizing a second stainless steel pipe to package bare fiber grating, a fiber grating temperature sensor is formed by utilizing a metal pipe to package bare fiber grating, and the fiber grating strain sensor and the fiber grating temperature sensor are packaged in parallel in a first stainless steel pipe by adopting epoxide resin. When the sensor is arranged on an engineering structure, the first stainless steel pipe produces the distortion and transmits the temperature and the strain of the structure to the fiber grating strain sensor at the inner part and the fiber grating temperature sensor without strain influence through the epoxide resin, the measuring value of the strain sensor is compensated by the temperature sensor so as to achieve the simultaneous measurement of the strain and the temperature of the structure.

Description

technical field [0001] The invention relates to an engineering structure strain and temperature measuring device, in particular to a sensor for simultaneously monitoring the temperature and strain state of civil engineering structures during long-term use. Background technique [0002] At present, sensors based on the principle of resistance or vibration are installed on engineering structures to measure the temperature and strain response of the structure. However, this type of sensor still has certain limitations in engineering applications, such as signal distortion due to electromagnetic interference, drift and creep during long-term use, and complex wires. There are also some strain or temperature sensors based on optical principles that can be used for structural strain and temperature measurement, but they only measure a single physical quantity and cannot meet the requirements for the integration of structural monitoring sensors. [0003] In order to develop sensors...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/16G01K11/32G01K11/3206
Inventor 李爱群周广东丁幼亮
Owner SOUTHEAST UNIV
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