CN203116886U - Optical fiber integration fixed platform for correcting temperature of distributed optical fiber temperature sensor - Google Patents

Abstract

The utility model discloses an optical fiber integration fixed platform for correcting temperature of a distributed optical fiber temperature sensor. The optical fiber integration fixed platform for correcting temperature of the distributed optical fiber temperature sensor comprises eight optical fiber placement platforms with the same structure, every two optical fiber placement platforms are overlaid to be a group, an optical fiber ring is placed between the bottom surfaces of the two optical fiber placement platforms to form four optical fiber test platforms with the same structure, and the four optical fiber test platforms are fixed in a platform fixed frame. Transverse fixed rods are arranged on the upper end of the platform fixed frame, and are provided with a standard thermometer fixed device, openings are arranged on the centers of the bottom surfaces of the optical fiber placement platforms, a standard thermometer vertically passes through the bottom portions of the four optical fiber test platforms, one end of the standard thermometer and one end of four optical fiber rings connected in series are connected into an industrial personal computer, and the transverse fixed rods are fixed on the two sides of a constant temperature water tank. The optical fiber integration fixed platform for correcting temperature of the distributed optical fiber temperature sensor solves the problem that a plurality of temperature sensing optical fiber rings and the standard thermometer in the constant temperature water tank can not measure the temperature of the same temperature field at the same time, simultaneously prevents optical fibers from being involved in the constant temperature water tank, and improves accuracy and safety of calibration experiment.

Description

An integrated fixed platform for optical fiber ring for temperature calibration of distributed optical fiber temperature sensor

technical field

The utility model relates to a calibration temperature measuring platform, in particular to an integrated fixed platform of an optical fiber ring for temperature calibration of a distributed optical fiber temperature sensor.

Background technique

Distributed optical fiber temperature sensor mainly uses temperature-sensing optical fiber as temperature sensor. Since the optical fiber can simultaneously detect the temperature of each point where the optical fiber is laid, and has the advantages of acid resistance, corrosion resistance and high temperature resistance, distributed optical fiber temperature sensors have been widely used in tunnels, subways, power plants, chemical plants, etc. Traditional equipment cannot be efficient and accurate. Large-scale industrial sites for temperature measurement. Due to the increasing application occasions of distributed optical fiber temperature sensors, the requirements for temperature measurement accuracy are getting higher and higher. Therefore, it is very urgent for manufacturers and users to introduce corresponding calibration specifications.

In the temperature measurement calibration system, the comparison method is usually used to transfer the value of the calibration of the temperature measuring device, that is, the measurement standard device with a higher precision level and the temperature device to be tested are used to measure the water temperature in the same temperature field, and the temperature measurement results are compared to distinguish The quality of the measured thermometer is good or bad, and it is corrected accordingly. The measurement standard appliance and the tested temperature appliance need to measure the water temperature in the same temperature field, which is one of the keys to calibration. However, since there is no temperature calibration platform specially designed for distributed optical fiber temperature sensors on the market, in actual calibration, calibration As a result, there is a large error, and there is a problem of low efficiency and low accuracy when calibrating the temperature measurement effect of multiple optical fiber rings at the same time.

Contents of the invention

The purpose of this utility model is to provide an integrated and fixed platform for optical fiber rings for temperature calibration of distributed optical fiber temperature sensors to solve the problem that multiple temperature-sensing optical fiber rings and standard thermometers cannot measure the temperature of the same temperature field at the same time in a constant temperature water tank. The integrated fixed platform separates the optical fiber from the internal mechanical structure of the constant temperature tank, preventing the optical fiber from being involved in the constant temperature water tank, and improving the accuracy and safety of the calibration experiment.

In order to solve the above technical problems, the utility model is achieved through the following technical solutions:

The utility model includes a platform fixing frame, a standard thermometer fixing device, a pull rod, a standard thermometer, a plurality of optical fiber placing tables with the same structure, an industrial computer, a constant temperature water tank and a horizontal platform fixing rod; eight optical fiber placing tables with the same structure, each with two The optical fiber placing tables are stacked into a group, and the fiber rings are placed between the bottom surfaces of the two optical fiber placing tables to form four optical fiber test platforms with the same structure. Each optical fiber test platform is respectively placed with an optical fiber ring, and the four optical fiber test platforms are fixed in the platform fixing frame. The upper end of the platform fixing frame is equipped with a horizontal fixing rod, and a standard thermometer fixing device is installed on the horizontal fixing rod to fix the standard thermometer. There is a hole in the center of the bottom surface of the optical fiber placement platform, and the standard thermometer vertically passes through the bottom of the four optical fiber test platforms. One end of the standard thermometer One end of the optical fiber ring connected in series with the four is connected to the industrial computer, and the horizontal platform fixing rod is fixed on both sides of the constant temperature water tank with bolts and nuts.

The four optical fiber test platforms with the same structure are made of textile material on the bottom surface and wrapped by long strips of textile materials. Columnar protrusions, and each pair of optical fiber placement tables are fastened with strings through the openings of the long textile material; the pull rod moves along the circumferential direction, and the openings are matched with the columnar protrusions to form a cylinder with adjustable diameter.

The optical fiber test platform is composed of two optical fiber placement platforms, and each pair of optical fiber placement platforms is fastened with a string through the side holes, and the optical fiber ring is clamped in it, so that the position of the optical fiber ring can be ensured in a small range during the experiment. remain unchanged.

Each pair of optical fiber placement tables can be disassembled from the pull rod so as to adjust the radius respectively.

The beneficial effect that the utility model has is:

The utility model solves the problem that multiple temperature-sensing optical fiber rings and standard thermometers cannot simultaneously measure the temperature of the same temperature field in a constant temperature water tank by designing an integrated fixed platform for temperature calibration of a distributed optical fiber temperature sensor. The platform separates the optical fiber ring from the internal mechanical structure of the constant temperature tank, preventing the optical fiber from being involved in the constant temperature tank, and improving the accuracy and safety of the calibration experiment. Moreover, since the optical fiber placement platforms of each layer can be disassembled from the pull rods, the radius of the optical fiber placement platform can be adjusted conveniently, so as to be used for temperature calibration experiments of optical fiber rings of different sizes.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a schematic diagram of the structure of the optical fiber placement platform.

Fig. 3 is a schematic diagram of using the utility model with a constant temperature water tank.

In the figure: 1. Platform fixing frame, 2. Standard thermometer fixing device, 3. Pull rod, 4. Standard thermometer, 5. Optical fiber ring, 6. Optical fiber placement platform, 7. Industrial computer, 8. Constant temperature water tank, 9. Horizontal platform fixed rod.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

As shown in Fig. 1, Fig. 2 and Fig. 3, the utility model includes a platform fixing frame 1, a standard thermometer fixing device 2, a pull rod 3, a standard thermometer 4, an optical fiber ring 5, a plurality of optical fiber placement platforms 6 with the same structure, and an industrial computer 7. Constant temperature water tank 8 and horizontal platform fixing rod 9; eight optical fiber placement platforms 6 with the same structure, every two optical fiber placement platforms 6 are stacked into a group, and an optical fiber ring 5 is placed between the bottom surfaces of the two optical fiber placement platforms 6 to form the same structure There are four optical fiber test platforms, and each optical fiber test platform is respectively placed with an optical fiber ring 5, and the four optical fiber test platforms are fixed in the platform fixing frame 1; the upper end of the platform fixing frame 1 is equipped with a horizontal fixing rod 9, and a standard The thermometer fixing device 2 is used to fix the standard thermometer 4. There is a hole in the center of the bottom surface of the optical fiber placement table 6. The standard thermometer 4 vertically passes through the bottom of the four optical fiber test platforms. One end of the standard thermometer 4 is connected to one end of the four optical fiber rings 5 connected in series. The industrial computer 7 and the horizontal platform fixed rod 9 are fixed on both sides of the constant temperature water tank 8 with bolts and nuts.

The four optical fiber test platforms with the same structure are made of textile materials at the bottom and wrapped with strips of textile materials. One end of the strip of textile materials is evenly opened, and one end of the opening of the strip of textile material is connected to the pull rod 3, and the other end is There are columnar protrusions, and each pair of optical fiber placement platforms 6 is fastened with a string through the opening of the long textile material; the pull rod 3 moves along the circumferential direction, and the opening and the columnar protrusions are matched to form a cylinder with adjustable diameter.

The standard thermometer fixing device 2: includes a standard device fixing fixture and a device for fixing the position on the lateral part of the platform fixing frame 1.

Described optical fiber testing platform: it is made up of two optical fiber placing platforms, optical fiber placing platforms 6, and each pair of optical fiber placing platforms 6 can be fastened by punching holes on its side with a string, and the optical fiber ring 5 is clamped therein, so that during the experiment, it can ensure The position of the fiber ring remains constant within a small area.

Each pair of optical fiber placement tables 6 can be disassembled from the pull rod 3 so as to adjust the radius respectively.

Embodiment of the utility model:

(1) According to the length of the optical fiber ring 5 in the calibration experiment, pull the pull rod 3 to drive the textile material on the side of the optical fiber placement table 6, and use the columnar protrusions on the side of the optical fiber placement table 6 to cooperate with punching to control the radius of the optical fiber placement table 6, The radius of the optical fiber placing table 6 is adapted to the radius of the optical fiber ring 5 .

(2) Place the optical fiber ring 5 between the two optical fiber placement platforms 6, and fasten the two optical fiber placement platforms with a string through the side holes to prevent the optical fiber ring 5 from falling out of the optical fiber ring integrated fixing platform. And because the optical fiber placing table 6 is made of textile material, the optical fiber will not be pinched off by the two optical fiber placing tables. Each optical fiber test platform can place the optical fiber ring 5, so the utility model can simultaneously test the performance of multiple optical fiber rings.

(3) Use bolts and nuts to fix the horizontal platform fixing rod 9 on both sides of the constant temperature water tank.

(4) Change the horizontal position and vertical height of the standard thermometer 4 through the standard thermometer fixing device 2 to ensure that the standard instrument and the optical fiber ring 5 measure the temperature of the same temperature field.

(5) Connect the optical fiber ring 5 to the industrial computer 7, connect the standard thermometer to the industrial computer 7 through the secondary instrument 9, turn on the constant temperature water tank 8 and the distributed optical fiber temperature sensor, and conduct a temperature measurement experiment.

The above-mentioned specific embodiments are used to explain the utility model, rather than to limit the utility model. Within the spirit of the utility model and the scope of protection of the claims, any modifications and changes made to the utility model fall into the scope of the utility model. scope of protection.

Claims (4)

1. An optical fiber ring integrated fixed platform for temperature calibration of a distributed optical fiber temperature sensor, characterized in that it includes a platform fixing frame (1), a standard thermometer fixing device (2), a pull rod (3), a standard thermometer (4), Multiple optical fiber placement tables (6), industrial computer (7), constant temperature water tank (8) and horizontal platform fixing rod (9) with the same structure; eight optical fiber placement tables (6) with the same structure, each with two optical fiber placement tables (6) Stacked into a group, place fiber rings (5) between the bottom surfaces of two fiber placement tables (6) to form four fiber test platforms with the same structure, each fiber test platform is respectively placed with fiber rings (5), four The optical fiber test platform is fixed in the platform fixing frame (1); the upper end of the platform fixing frame (1) is equipped with a horizontal fixing rod (9), and the horizontal fixing rod (9) is equipped with a standard thermometer fixing device (2) to fix the standard thermometer ( 4), the center of the bottom surface of the optical fiber placement platform (6) has a hole, and the standard thermometer (4) vertically passes through the bottom of the four optical fiber test platforms, and one end of the standard thermometer (4) is connected to the other end of the four serially connected optical fiber rings (5) The industrial computer (7) and the horizontal platform fixing rod (9) are fixed on both sides of the constant temperature water tank (8). 2. The temperature calibration of a distributed optical fiber temperature sensor according to claim 1 is characterized in that: the four optical fiber test platforms with the same structure, the bottom surface is made of textile materials, and the side surface is made of textile materials. Wrapped by a long strip of textile material, one end of the long strip of textile material is evenly opened, one end of the long strip of textile material is connected to the pull rod (3), and the other end has a columnar protrusion, and each pair of optical fiber placement platforms (6) passes through with a string The openings of the strips of textile material are tightened; the pull rod (3) moves along the circumferential direction to form a cylinder with an adjustable diameter by matching the openings with the columnar protrusions. 3. the temperature calibration of a kind of distributed optical fiber temperature sensor according to claim 1 is characterized in that: described optical fiber test platform is made up of two optical fiber placement platforms (6), each pair of optical fiber The placing table (6) is fastened by punching holes on its side with a string, and the optical fiber ring (5) is clamped therein, so that during the experiment, the position of the optical fiber ring can be guaranteed to remain unchanged in a small range. 4. The temperature calibration of a distributed optical fiber temperature sensor according to claim 1 is characterized in that: each pair of optical fiber placement platforms (6) can be disassembled with the pull rod (3), to adjust the radius separately.

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