An on-line monitoring device and method for looseness of subway catenary support
A monitoring device and catenary technology, applied in the field of subway tunnel engineering, can solve the problems of easy omission, dense arrangement, loose mounting brackets, etc., and achieve the effect of broad application prospects, saving time and manpower, and improving safety.
Active Publication Date: 2018-08-28
CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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Problems solved by technology
At present, the conventional catenary supports are densely arranged and the distance is long, and there is no effective online monitoring method for the looseness of the installation supports. Generally, manual regular inspections are used to judge whether there is displacement based on the relative positions of the marks. The inspection efficiency is low and it is easy to miss.
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[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments to facilitate a clear understanding of the present invention, but they do not limit the present invention.
[0025] In view of the dense distribution of catenary supports in subway tunnels, long tunnel distances, and complex electromagnetic environments, the present invention proposes online monitoring of catenary supports using distributed optical fiber strain sensing measurement technology. The principle block diagram of the specific implementation is as follows figure 1 As shown, an optical fiber strain sensor 7 is set between the end of each catenary support and the top of the tunnel, and the optical fiber strain sensors S1 ~ Sn+1 distributed on each catenary support are connected in series with the optical fiber dynamic analyzer through the transmission optical fiber 2 1 is connected to form a loop, and the optical fiber dynamic anal...
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The invention discloses an online monitoring device and method of subway contact net support looseness. The device comprises an optical fiber sensing dynamic analyzer, a transmission optical fiber, and a contact net support which is arranged between each contact net and a tunnel top. One end of the contact net support is provided with a connecting piece, one end of the connecting piece is fixedly connected to the end part of the contact net support, and the other end is fixedly connected to the tunnel top. Optical fiber strain sensors are fixed to the connecting piece, and multiple optical fiber strain sensors are connected in series through the transmission optical fiber and then are connected to a dynamic optical fiber analyzer to form a loop. According to the invention, the remote online real-time monitoring of the fastening condition of the contact net can be realized, a lot of time and manpower consumed by manual inspection is saved, a rich data support is provided for the maintenance and reinforcement of a contact net fastener, positioning maintenance according to needs is achieved truly, and the practicability is high.
Description
technical field [0001] The invention belongs to the technical field of subway tunnel engineering, and in particular relates to an on-line monitoring device and method for loosening of a subway catenary support. Background technique [0002] Under the double action of the vibration caused by the long-term reciprocating operation of the train and the piston wind of the train, the installation and fastening of the bracket carrying the high-voltage catenary has a great risk of loosening and failure. At this stage, the conventional catenary supports are densely arranged and the distance is long. There is no effective online monitoring method for the looseness of the mounting brackets. Generally, manual regular inspections are used to judge whether there is displacement based on the relative positions of the marks. The inspection efficiency is low and it is easy to miss. Contents of the invention [0003] The object of the present invention is to solve the shortcomings of the ab...
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IPC IPC(8): G01D21/00
CPCG01D21/00
Inventor 蔡崇庆熊朝辉车轮飞刘俊林昶隆付维纲赵建伟夏继豪胡清华吴敏军
Owner CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP