CN215727610U

CN215727610U - Shield tail brush wear monitoring device based on fiber grating

Info

Publication number: CN215727610U
Application number: CN202121341364.8U
Authority: CN
Inventors: 刘柯
Original assignee: Tianjin Qiushi Fiber Technologies Co ltd
Current assignee: Tianjin Qiushi Fiber Technologies Co ltd
Priority date: 2021-06-16
Filing date: 2021-06-16
Publication date: 2022-02-01
Anticipated expiration: 2031-06-16

Abstract

The utility model discloses a shield tail brush abrasion monitoring device based on fiber bragg gratings, which comprises a laser light source, an optical splitter connected with the laser source and a plurality of circulators or couplers connected with the optical splitter in parallel, wherein an abrasion monitoring sensor is connected to a light outlet of each circulator or coupler, a reflected light outlet of each circulator or coupler is connected with a signal acquisition module, a photoelectric detector is arranged in the signal acquisition module, and the photoelectric detector is connected with a host computer through a communication system; the abrasion monitoring sensor is provided with a fiber core, the fiber core is packaged in the capillary, and the fiber core is provided with a plurality of gratings which are arranged at intervals, are uniformly distributed, have different central wavelengths and have the same length direction with the abrasion monitoring direction of the sensor. During the use with the sensor setting in backplate and the steel wire brush hair of shield tail brush, make sensor and backplate and steel wire brush wearing and tearing simultaneously, utilize fiber grating as length marker bit, along with the wearing and tearing of shield tail brush, grating quantity reduces thereupon to learn shield tail brush wearing and tearing volume.

Description

Shield tail brush wear monitoring device based on fiber grating

Technical Field

The utility model belongs to the field of shield tunneling machine equipment, and particularly relates to a shield tail brush abrasion monitoring device based on fiber bragg gratings.

Background

With the gradual development and further improvement of shield machines and shield technologies, shield construction methods have been widely used in the construction of underground railways and tunnel engineering in large and medium-sized cities, and play more and more important roles. When the shield method is used for construction, the sealing degree of the shield tail brush plays a decisive role in the quality, construction safety and construction period of the whole project. At present, more and more long-distance and high-water-pressure construction projects provide higher and higher requirements for the state of the shield tail brush, the state of the abrasion condition of the shield tail brush needs to be monitored for avoiding accidents, and no real-time shield tail brush abrasion condition monitoring equipment is put into use at present.

SUMMERY OF THE UTILITY MODEL

The utility model provides a shield tail brush abrasion monitoring device based on fiber bragg gratings for solving the technical problems in the prior art, which can monitor the abrasion condition of a shield tail brush.

The technical scheme adopted by the utility model for solving the technical problems in the prior art is as follows: a shield tail brush abrasion monitoring device based on fiber bragg gratings comprises a laser light source, an optical splitter connected with the laser light source and a plurality of circulators or couplers connected with the optical splitter in parallel, wherein an abrasion monitoring sensor is connected to a light outlet of each circulator or coupler, a reflected light outlet of each circulator or coupler is connected with a signal acquisition module, a photoelectric detector is arranged in each signal acquisition module, and the photoelectric detector is connected with an upper computer host through a communication system; the abrasion monitoring sensor is provided with a fiber core, the fiber core is packaged in the capillary, and a plurality of gratings which are arranged at intervals, are uniformly distributed, have different central wavelengths and are consistent in the abrasion monitoring direction of the sensor are arranged on the fiber core.

The capillary tube is made of stainless steel.

And the central wavelengths of all the gratings decrease from large to small from near to far from the wear end of the wear monitoring sensor.

The laser light source is a tunable laser light source.

The utility model has the advantages and positive effects that: during the use with the sensor setting in backplate and the steel wire brush hair of shield tail brush, make sensor and backplate and steel wire brush wearing and tearing simultaneously, utilize fiber grating as length marker bit, along with the wearing and tearing of shield tail brush, grating quantity reduces thereupon to learn shield tail brush wearing and tearing volume. And the length can be cut by oneself to the sensor as required to the shield tail brush of adaptation different models. The optical fiber sensor has the characteristics of high stability, small volume and high sensitivity, can accurately reflect the abrasion condition of the shield tail brush in real time, is installed in the shield tail brush, has long service life and is not easy to damage.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a wear monitoring sensor according to the present invention;

FIG. 3 is a schematic view of the wear monitoring sensor of the present invention installed within the wire bristles of the tail brush;

FIG. 4 is a schematic view of the wear monitoring sensor of the present invention installed inside the shield tail brush apron.

In the figure: 1. a laser light source; 2. an optical splitter; 3. a circulator or coupler; 4. a wear monitoring sensor; 4-1, capillary; 4-2, a fiber core; 4-3, grating; 5. a signal acquisition module; 6. a host computer; 7. steel wire brush hair of the shield tail brush; 8. and brushing the shield tail with a guard plate.

Detailed Description

In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:

referring to fig. 1 and 2, a shield tail brush wear monitoring device based on fiber bragg grating includes a laser light source 1, an optical splitter 2 connected to the laser light source 1, and a plurality of circulators or couplers 3 connected in parallel to the optical splitter 2, a wear monitoring sensor 4 is connected to a light outlet of each circulator or coupler 3, a reflected light outlet of the circulator or coupler 3 is connected to a signal acquisition module 5, a photoelectric detector is arranged in the signal acquisition module 5, and the photoelectric detector is connected to an upper computer host 6 through a communication system.

The abrasion monitoring sensor 4 is provided with a fiber core 4-2, the fiber core 4-2 is packaged in a capillary 4-1, the material of the capillary 4-1 is the same as that of a monitored shield tail brush, and a plurality of gratings 4-3 which are arranged at intervals, are uniformly distributed, have different central wavelengths and are consistent with the abrasion monitoring direction of the sensor in the length direction are arranged on the fiber core 4-2.

In this embodiment, the capillary 4-1 is made of stainless steel. The central wavelengths of all the gratings 4-3 are sequentially decreased from near to far from the abrasion end of the abrasion monitoring sensor, and the manufacture and the use are convenient. The laser light source 1 is a tunable laser light source.

Referring to fig. 3 and 4, in application, the wear monitoring sensor 4 may be installed in the steel wire brush bristles 7 of the shield tail brush, or inside the guard plate 8 of the shield tail brush, or both inside the steel wire brush bristles 7 and inside the guard plate 8 of the shield tail brush. When the optical fiber wear monitoring device is used, the optical splitter 2 divides light generated by the laser light source 1 into a plurality of channels, optical signals of each channel pass through the circulator or the coupler 3 and then are reflected by the grating in the wear monitoring sensor 4, reflected optical signals pass through the circulator or the coupler 3 and enter the signal acquisition module 5 to be subjected to photoelectric conversion and signal demodulation, and then the reflected optical signals are transmitted to the upper computer 6 through the communication system.

The communication system may adopt a wired signal transmission mode or a wireless signal transmission mode.

Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and those skilled in the art can make many modifications without departing from the spirit and scope of the present invention as defined in the appended claims.

Claims

1. A shield tail brush abrasion monitoring device based on fiber bragg gratings is characterized by comprising a laser light source, an optical splitter connected with the laser light source and a plurality of circulators or couplers connected with the optical splitter in parallel, wherein an abrasion monitoring sensor is connected to a light outlet of each circulator or coupler, a reflected light outlet of each circulator or coupler is connected with a signal acquisition module, a photoelectric detector is arranged in each signal acquisition module, and the photoelectric detector is connected with an upper computer host through a communication system; the abrasion monitoring sensor is provided with a fiber core, the fiber core is packaged in the capillary, and a plurality of gratings which are arranged at intervals, are uniformly distributed, have different central wavelengths and are consistent in the abrasion monitoring direction of the sensor are arranged on the fiber core.

2. The fiber grating-based shield tail brush wear monitoring device of claim 1, wherein the capillary is made of stainless steel.

3. The fiber grating-based shield tail brush wear monitoring device according to claim 1, wherein the central wavelengths of all the gratings decrease from large to small in sequence from the near to the far from the wear end of the wear monitoring sensor.

4. The fiber grating-based shield tail brush wear monitoring device of claim 1, wherein the laser light source is a tunable laser light source.