CN-121977626-A - Fiber bragg grating sensor tooth root positioning tool, pasting device and method

CN121977626ACN 121977626 ACN121977626 ACN 121977626ACN-121977626-A

Abstract

The invention discloses a fiber bragg grating sensor tooth root positioning tool, a pasting device and a method, wherein the positioning tool is used for positioning a fiber bragg grating sensor at the tooth root of a gear and comprises a positioning bottom plate, wherein the positioning bottom plate is used for being attached to the tooth root, so that the fiber bragg grating sensor is positioned between the positioning bottom plate and the tooth root, a fiber penetration hole is formed in the positioning bottom plate, so that the fiber bragg grating sensor is exposed out of the fiber penetration hole for subsequent processes, 2 guide plates are respectively connected with two sides of the positioning bottom plate, the bottom edges of the 2 guide plates are used for being attached to the tooth surface, the 2 guide plates and the positioning bottom plate form a concave guide groove, and the angle between the guide plates and the positioning bottom plate is adjustable, so that the concave guide groove is matched with a tooth groove. The positioning tool can realize accurate arrangement of the optical fibers in a narrow space, avoid measurement errors caused by offset, and is suitable for narrow curved surface spaces such as gear tooth grooves.

Inventors

LIU JUN
WU BEIQI
WANG YANFENG
SONG HAN
WEI SIJIA

Assignees

武汉理工大学
中国航发四川燃气涡轮研究院

Dates

Publication Date: 20260505
Application Date: 20260402

Claims (10)

1. A fiber bragg grating sensor tooth root positioning tool is used for positioning a fiber bragg grating sensor at the tooth root of a gear, the gear comprises a body and gear teeth circumferentially arranged on the body, tooth grooves are formed between adjacent gear teeth, the bottom of each tooth groove is the tooth root, and tooth surfaces of the gear teeth are arranged on two sides of the tooth root, and the fiber bragg grating sensor tooth root positioning tool is characterized by comprising: the positioning bottom plate is used for being attached to the tooth root, so that the fiber bragg grating sensor is positioned between the positioning bottom plate and the tooth root; the optical fiber through hole is formed in the positioning bottom plate, so that the optical fiber grating sensor is exposed out of the optical fiber through hole and is used for the subsequent process; The bottom edges of the 2 guide plates are respectively connected with two sides of the positioning bottom plate, the guide plates are used for being attached to tooth surfaces, the 2 guide plates and the positioning bottom plate form an inner concave guide groove, and the angle between the guide plates and the positioning bottom plate is adjustable, so that the inner concave guide groove is matched with a tooth groove.
2. The fiber bragg grating sensor tooth root positioning tool of claim 1, wherein the guide plate is connected with the positioning bottom plate through a hinge.
3. The fiber bragg grating sensor tooth root positioning tool of claim 1, wherein the top of the guide plate is equal in height to the top surface of the gear teeth; the top edge of the guide plate is connected with an outer turning plate, and the outer turning plate is attached to the top surface of the gear teeth.
4. The fiber bragg grating sensor tooth root positioning tool of claim 3, wherein the outer turning plate is connected with the guide plate through a hinge.
5. The fiber bragg grating sensor tooth root pasting device is characterized by comprising: The fiber optic grating sensor root positioning tool of any one of claims 1-4; And the glue injection tool is used for extending into the concave guide groove and performing glue injection operation from the optical fiber through hole.
6. The fiber bragg grating sensor tooth root sticking apparatus according to claim 5, wherein the glue injection tool comprises: The operation rod is internally provided with a hollow glue injection channel, and the bottom of the operation rod is provided with an outlet of the glue injection channel; the glue injection roller is arranged at the bottom of the operating rod through a supporting structure.
7. The fiber bragg grating sensor root application apparatus according to claim 6, wherein the glue injection roller has a width equal to a width of the fiber through hole.
8. The fiber bragg grating sensor tooth root pasting device of claim 6, wherein a gasket for controlling starting and stopping of glue is arranged between the glue injection roller and the outlet of the glue injection channel.
9. The fiber bragg grating sensor tooth root sticking device according to claim 6, wherein the top of the operating rod is provided with an inlet of the glue injection channel, and the inlet is connected with an external glue supply system.
10. The bonding method realized by the fiber bragg grating sensor tooth root bonding device according to any one of claims 5 to 9, characterized by comprising the following steps: S1, according to tooth profile structural parameters of a gear, adjusting an angle between a guide plate and a positioning bottom plate, setting a fiber grating sensor tooth root positioning tool into a tooth slot, and simultaneously placing a fiber grating sensor between the fiber grating sensor tooth root positioning tool and a tooth root; adjusting the position of the fiber bragg grating sensor to enable the fiber bragg grating sensor to be attached to a tooth root target attaching position, attaching a positioning bottom plate to the tooth root, and attaching a guide plate to a corresponding tooth surface; s2, tensioning the optical fiber end of the fiber grating sensor, and adjusting the fiber grating sensor to an angle to be measured; S3, extending a glue injection tool for injecting glue into the concave guide groove, and performing glue injection operation from the optical fiber through hole; and S4, after the glue is completely solidified, taking down the fiber bragg grating sensor tooth root positioning tool.

Description

Fiber bragg grating sensor tooth root positioning tool, pasting device and method Technical Field The invention belongs to the field of optical fiber sensing preparation, and particularly relates to a fiber bragg grating sensor tooth root positioning tool, a sticking device and a method. Background The fiber Bragg grating can be directly modulated by external physical quantities such as strain and temperature due to the central wavelength of the fiber Bragg grating, and has excellent linear response characteristics, so that the fiber Bragg grating becomes an ideal strain and temperature measurement sensing element. In addition, the optical fiber Bragg grating adopts a wavelength modulation mode to carry out signal transmission, so that the distortion influence of light intensity loss on a measurement result is avoided. In recent years, measurement technology based on fiber Bragg gratings has been rapidly developed in the field of fiber sensing, and has been widely applied to strain and temperature monitoring of various engineering structures. At present, the common optical fiber pasting method mainly comprises the step of directly pasting optical fibers on the surface of a substrate. The sticking mode is widely applied in scientific research experiments, for example Wang Wei and the like, bare fiber gratings are directly stuck on an equal-strength cantilever beam to develop strain transfer rule research of a surface type fiber grating strain sensor (reference of the surface type fiber grating sensor strain transfer research, source journal of laser and infrared, 2008, volume 38, 12 th period). However, when the pasting position is in a narrow space, the operation is inconvenient, and a small deviation of the pasting position can cause a larger error in the measurement strain result, so that the test accuracy is affected. Another optical fiber pasting method is to pre-process grooves on the surface of the substrate and embed the optical fibers into the grooves to ensure positioning accuracy. Although the optical fiber position can be effectively fixed by the mode, for a substrate with harder materials, such as nickel-titanium memory alloy or high-strength steel, the slotting process is time-consuming and labor-consuming, high in processing cost and limited by the stroke length of processing equipment, and the single slotting length is limited, if the optical fiber needs to be pasted on a longer substrate, the optical fiber needs to be slotted in a segmented mode, so that tiny dislocation exists at the connection part of each segment of slotting, thereby introducing measurement errors and affecting the whole sensing effect. Until now, for the positioning and installation of fiber grating sensors in a substrate made of hard materials and/or in a narrow space, means and devices for effectively eliminating measurement errors are lacking. Disclosure of Invention Aiming at the defects or improvement demands of the prior art, the invention provides a fiber grating sensor tooth root positioning tool, a pasting device and a method, which are suitable for positioning and installing fiber gratings in a narrow space and avoid measurement errors caused by pasting. In order to achieve the above object, according to one aspect of the present invention, there is provided a fiber bragg grating sensor tooth root positioning tool for positioning a fiber bragg grating sensor at a tooth root of a gear, the gear including a body and teeth circumferentially arranged on the body, tooth grooves between adjacent teeth, tooth bottoms of the tooth grooves being tooth roots, tooth flanks of the teeth being on both sides of the tooth roots, comprising: the positioning bottom plate is used for being attached to the tooth root, so that the fiber bragg grating sensor is positioned between the positioning bottom plate and the tooth root; the optical fiber through hole is formed in the positioning bottom plate, so that the optical fiber grating sensor is exposed out of the optical fiber through hole and is used for the subsequent process; The bottom edges of the 2 guide plates are respectively connected with two sides of the positioning bottom plate, the guide plates are used for being attached to tooth surfaces, the 2 guide plates and the positioning bottom plate form an inner concave guide groove, and the angle between the guide plates and the positioning bottom plate is adjustable, so that the inner concave guide groove is matched with a tooth groove. According to the scheme, the guide plate is connected with the positioning bottom plate through the hinge. According to the scheme, the top of the guide plate is equal to the top surface of the gear teeth; the top edge of the guide plate is connected with an outer turning plate, and the outer turning plate is attached to the top surface of the gear teeth. According to the scheme, the outer turning plate is connected with the guide plate through the hinge. According to a second aspect of the p