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Replaceable fiber temperature sensor

An optical fiber temperature and sensor technology, applied in the sensor field in the field of civil engineering technology, can solve the problems that long-term monitoring cannot be achieved, the replacement of sensors or sensing components is not considered, and the data is no longer available.

Inactive Publication Date: 2014-05-14
YUANYI CONSTR TECH SHANGHAI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But its defect is that it only focuses on the accuracy of the sensor, but does not consider the replacement of the sensor or sensing components. Once the internal fiber grating ages, the data measured by the sensor is no longer available, so it cannot be used for a long time. monitoring

Method used

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  • Replaceable fiber temperature sensor
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Embodiment Construction

[0015] The embodiments of the present invention are described in detail below: this embodiment is implemented under the premise of the technical solution of the present invention, and detailed implementation methods and processes are provided, but the protection scope of the present invention is not limited to the following embodiments.

[0016] This embodiment includes: a hollow tubular metal sleeve 1, the lower part is filled with a heat conductor 2 (silver powder, copper powder, graphite powder or heat-conducting silica gel), and a metal base 6 is buried in it, and an optical fiber grating 3 is consolidated on the metal base 6 , the upper end of the fiber grating 3 is connected to one end of the transmission fiber 4, and the other end of the transmission fiber 4 extends out of the metal sleeve 1 and is externally connected to the demodulation device. An active seal 7 is installed at the open end of the metal sleeve 1 .

[0017] The packaged sensor structure is as attached ...

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Abstract

The invention discloses a replaceable fiber temperature sensor, and belongs to the technical field of civil engineering. The replaceable fiber temperature sensor comprises a metal sleeve, a transmission fiber, a fiber grating, a metal substrate and a thermal conductor. The transmission fiber, the fiber grating and the metal substrate are connected to form a temperature sensing device for sensing a detection point temperature transmitted by the thermal conductor. When the device is aged, an active seal can be opened, the temperature sensing device is pulled out of the sleeve, then a new device is extended into the thermal conductor in the sleeve, and the sleeve is sealed by the active seal. By replacing an aged device, long-term monitoring of temperature monitoring data can be realized, and the operation is simple and convenient.

Description

technical field [0001] The invention relates to a sensor in the technical field of civil engineering, in particular to a replaceable optical fiber temperature sensor. Background technique [0002] Due to the needs of mechanical analysis and structural health monitoring, temperature sensors are installed on many reinforced concrete structures. According to the monitoring position, the sensors can be divided into two categories: surface type and embedded type, which are used to monitor the surface temperature and internal temperature of concrete structures respectively. At present, the temperature sensor generally adopts the optical fiber type, and the stability and reliability can be maintained for about 15 years, but the service life of the structure itself should reach decades or even hundreds of years. Therefore, in the process of structural monitoring, the sensor must be replaced. If it is a surface sensor, it is obviously easy to replace it, but for an embedded tempera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/32G01K11/3206
Inventor 袁艺
Owner YUANYI CONSTR TECH SHANGHAI