Fiber bragg grating load sensor with temperature compensation for equipment monitoring

Abstract

The utility model discloses a fiber grating load sensor with temperature compensation for equipment monitoring. The sensor comprises a protective cover, a welding strain core, prefabricated gum, a strain grating, a temperature compensation grating, an optical fiber pigtail and a sensitive substrate. The protective cover is made of the sensitive substrate, prefabricated gum is attached to the back face of the sensitive substrate, and a plurality of welding strain cores are arranged in the protective cover. The welding strain core is used for welding the strain grating. The strain grating is connected with the temperature compensation grating, the protective cover comprises a temperature compensation grating fixing groove, the temperature compensation grating fixing groove is used for fixing the temperature compensation grating, and the temperature compensation grating is used for compensating measurement of the strain grating. The temperature compensation grating is connected with the optical fiber pigtail, the protective cover comprises an optical fiber through hole, and the optical fiber pigtail extends out of the protective cover through the optical fiber through hole. The sensor provided by the utility model is high in measurement precision and convenient to use.

Description

TECHNICAL FIELD

[0001] The utility model relates to sensor technical field especially is related to a kind of fiber grating load sensors for equipment monitoring self temperature compensation. BACKGROUND

[0002] Modern science and technology develop continuously, sensor technology also has considerable progress.There is certain shortcoming in the related technical fiber grating sensor, first, cannot adapt to changeable environment, under the influence of temperature, the measurement accuracy of existing fiber grating sensor is poor.Second, the existing fiber grating sensor is more cumbersome when installing on site.

[0003] Therefore, how to provide a kind of fiber grating sensor that can be accurately measured and is convenient to use becomes the technical problem that the technical personnel in the field urgently need to solve. INVENTION CONTENTS

[0004] Based on the above problems, the utility model provides a kind of fiber grating load sensors for equipment monitoring self temperature compensation, improves measurement accuracy by temperature compensation grating and special processing strain grating, by prefabricated back glue, so that fiber grating sensor can be quickly installed on site and put into use.

[0005] The utility model embodiment discloses the following technical scheme:

[0006] The utility model embodiment discloses a kind of fiber grating load sensors for equipment monitoring self temperature compensation, the sensor includes:

[0007] Protective cover, welding strain core, prefabricated back glue, strain grating, temperature compensation grating, fiber tail fiber, sensitive substrate;

[0008] The material of the protective cover is the sensitive substrate, the back of the sensitive substrate is attached with the prefabricated back glue, and the protective cover is internally provided with a plurality of welding strain cores;

[0009] The welding strain core is used to weld the strain grating;

[0010] The strain grating is connected with the temperature compensation grating, the protective cover includes a temperature compensation grating fixing groove, the temperature compensation grating fixing groove is used to fix the temperature compensation grating, and the temperature compensation grating is used to compensate the measurement of the strain grating;

[0011] The temperature compensation grating is connected with the fiber tail fiber, and the protective cover includes a fiber through-hole, and the fiber tail fiber extends out of the protective cover through the fiber through-hole.

[0012] In a possible implementation manner, the strain grating is treated by gold plating process.

[0013] In a possible implementation, the welding strain core and the sensitive substrate are fixed by bolts.

[0014] In a possible implementation, the pre-prepared adhesive has a pre-prepared adhesive protective film, and the pre-prepared adhesive protective film is separated from the pre-prepared adhesive when the sensor is used, and the pre-prepared adhesive is used to be fixed with the side object.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The utility model discloses a kind of fiber grating load sensors with temperature compensation function, and high-efficiency monitoring to equipment is realized by innovative design, compared with prior art, the present application is integrated with temperature compensation grating, and temperature compensation is carried out to the measurement of strain grating.This design effectively reduces the influence of environmental temperature change on measurement result, improves the measurement accuracy of sensor in changeable environment, ensures the reliability of monitoring data.Sensor adopts pre-prepared adhesive and protective cover structure, so that field installation is more convenient.Pre-prepared adhesive design facilitates the quick fixing of sensor, reduces installation time and operational complexity, improves field construction efficiency.Protective cover is made of sensitive substrate, which provides effective protection for internal grating and welding strain core, preventing damage to sensor by external environment.The design of protective cover prolongs the service life of sensor, enhances its adaptability in harsh environment.Sensor is integrated with welding strain core, strain grating and temperature compensation grating, and is connected with external through fiber tail fiber.Integrated design not only improves the functional density of sensor, but also reduces system complexity, so that sensor can better adapt to different monitoring needs. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can obtain other drawings according to these drawings without creating creative labor.

[0018] Figure 1 An external structure schematic diagram of a fiber grating load sensor for equipment monitoring with self temperature compensation is provided for the utility model.

[0019] Figure 2 An internal structure schematic diagram of a fiber grating load sensor for equipment monitoring with self temperature compensation is provided for the utility model. DETAILED DESCRIPTION

[0020] As described above, the fiber grating sensor of the related art has some disadvantages, first, it cannot adapt to the changeable environment, and the existing fiber grating sensor has poor measurement accuracy under the influence of temperature.

[0021] In order to enable the person skilled in the art to better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor are within the protection scope of the present application.

[0022] Figure 1 An external structure schematic diagram of the fiber grating load sensor with temperature compensation for equipment monitoring provided by the present application, Figure 1 which comprises a protective cover 1, a prefabricated back adhesive 3, an optical fiber tail fiber 6 and a sensitive substrate 7.

[0023] In order to describe the fiber grating load sensor provided by the present application in detail, Figure 2 An internal structure schematic diagram of the fiber grating load sensor with temperature compensation for equipment monitoring provided by the present application, Figure 2 which comprises a welded strain core 2, a prefabricated back adhesive 3, a strain grating 4, a temperature compensation grating 5 and a sensitive substrate 7.

[0024] Next, the following Figure 1 and Figure 2 will be described. The overall, Figure 1 and Figure 2 comprise: a protective cover 1, a welded strain core 2, a prefabricated back adhesive 3, a strain grating 4, a temperature compensation grating 5, an optical fiber tail fiber 6 and a sensitive substrate 7.

[0025] The material of the protective cover 1 is the sensitive substrate 7, the back surface of the sensitive substrate 7 is attached with the prefabricated back adhesive 3, and the protective cover is internally provided with a plurality of welded strain cores 2.

[0026] The welded strain core 2 is used for welding the strain grating 4.

[0027] The strain grating 4 and the temperature compensation grating 5 are connected, the protective cover 1 comprises a temperature compensation grating fixing groove for fixing the temperature compensation grating 5, and the temperature compensation grating 5 is used for compensating the measurement of the strain grating 4.

[0028] The temperature compensation grating 5 and the optical fiber tail fiber 6 are connected, the protective cover 1 comprises an optical fiber through hole, and the optical fiber tail fiber 6 extends out of the protective cover 1 through the optical fiber through hole.

[0029] In order to obtain better measurement effect, the strain grating 4 in the sensitive component is treated by gold plating on both sides, and is directly welded with the welded strain core 2 through special welding, the deformation of the integrated structure can be quickly and accurately transmitted to the grating, and the accuracy of the strain measurement of the sensor is improved.

[0030] The welded strain core 2 is fixed with the sensitive substrate 7 through bolts, and the pre-prepared back adhesive 3 is attached to the back of the sensitive substrate 7, so that when the sensor is installed on site, the protective film of the pre-prepared back adhesive 3 can be quickly fixed with the measured object through the pre-prepared back adhesive, the construction difficulty is greatly reduced, the construction efficiency is greatly improved, and the construction cost is effectively reduced.

[0031] The utility model discloses a kind of fiber grating load sensors with temperature compensation function, and the efficient monitoring of equipment is realized by innovative design, compared with prior art, the present application is compensated by integrating temperature compensation grating, the measurement of strain grating is compensated with temperature.This design effectively reduces the influence of environmental temperature change on measurement result, improves the measurement accuracy of sensor in changeable environment, ensures the reliability of monitoring data.Sensor adopts pre-prepared back adhesive and protective cover structure, so that on-site installation is more convenient.The design of pre-prepared back adhesive facilitates the quick fixing of sensor, reduces installation time and operational complexity, improves on-site construction efficiency.Protective cover is made of sensitive substrate, which provides effective protection for internal grating and welded strain core, preventing damage to sensor by external environment.The design of protective cover prolongs the service life of sensor, enhances its adaptability in harsh environment.Sensor is integrated with welded strain core, strain grating and temperature compensation grating, and is connected with external through fiber tail fiber.Integrated design not only improves the functional density of sensor, but also reduces system complexity, so that sensor can better adapt to different monitoring needs.

[0032] Each embodiment in the specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments.

[0033] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fiber Bragg grating load sensor with temperature compensation for equipment monitoring, characterized in that: include: Protective cover, welding strain gauge core, prefabricated adhesive, strain gauge grating, temperature compensation grating, fiber pigtail, sensitive substrate; The material of the protective cover is the sensitive substrate, the back of the sensitive substrate is adhered with the prefabricated adhesive, and a plurality of the welding strain cores are arranged inside the protective cover; The welding strain core is used for welding the strain grating; The strain grating is connected to the temperature compensation grating, and the protective cover includes a temperature compensation grating fixing groove, the temperature compensation grating fixing groove is used to fix the temperature compensation grating, and the temperature compensation grating is used to compensate for the measurement of the strain grating; The temperature compensation grating is connected to the optical fiber pigtail, the protective cover comprises an optical fiber through hole, and the optical fiber pigtail extends out of the protective cover through the optical fiber through the through hole.

2. The sensor according to claim 1, characterized in that The strain grating is processed by a gold plating process.

3. The sensor according to claim 1, wherein The welding strain core and the sensitive substrate are fixed by bolts.

4. The sensor according to claim 1, wherein The prefabricated adhesive backing has a prefabricated adhesive backing protective film. When the sensor is used, the prefabricated adhesive backing protective film and the prefabricated adhesive backing are separated. The prefabricated adhesive backing is used to be fixed to the object.

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