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Railway roadbed self-powered sensing network arrangement method based on piezoelectric power generation

A technology of sensor network and railway roadbed, applied in the field of sensor network

Active Publication Date: 2021-11-26
BEIJING TIEKE SPECIAL ENG TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there is no research on the arrangement method of piezoelectric energy harvesters inside the railway subgrade in China.

Method used

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  • Railway roadbed self-powered sensing network arrangement method based on piezoelectric power generation
  • Railway roadbed self-powered sensing network arrangement method based on piezoelectric power generation
  • Railway roadbed self-powered sensing network arrangement method based on piezoelectric power generation

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Embodiment Construction

[0047]In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.

[0048] A method for arranging a railway subgrade self-powered sensor network based on piezoelectric power generation is provided, including:

[0049] (1) Determine the subgrade depth, train axle load range and vehicle speed range where the energy harvester is located.

[0050] Determine the embankment depth h1, h2...hi...hn of the energy harvester. Determine the train axle load range, and select the train axle focus Wj a...

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Abstract

The invention discloses a railway roadbed self-powered sensing network arrangement method based on piezoelectric power generation. The method comprises the steps of: acquiring dynamic responses at different roadbed depths according to different train axle loads and train speeds; for each roadbed depth, acquiring strain energy under different axle loads and different vehicle speeds based on the dynamic response; acquiring dynamic stress amplitude and natural vibration frequency of a roadbed through utilizing the dynamic response to serve as external load input of the energy collector, and acquiring electric energy converted by the energy collector; and comparing the strain energy and electric energy under the corresponding axle load and the vehicle speed, and re-optimizing the structure of the energy collector at the roadbed depth when a difference value exceeds a threshold value,. According to the railway roadbed self-powered sensing network arrangement method, the distribution features of dynamic stress and vibration frequency in the railway roadbed under different axle loads, different speeds and different roadbed types are summarized, and the dynamic stress and vibration frequency in the railroad bed are used as the design and arrangement basis of the piezoelectric energy collector in the railroad bed, so that the piezoelectric energy collector suitable for the railroad bed is designed.

Description

technical field [0001] The invention relates to the technical field of sensor networks, in particular to a self-powered sensor network and an arrangement method for a railway subgrade based on piezoelectric power generation. Background technique [0002] The country vigorously advocates the adoption of clean energy, and the combination of "smart construction" development strategy will continue to expand the development of clean energy. At present, most of the wireless sensor network nodes are still powered by traditional batteries. However, the sensor network nodes located inside the railway embankment have a wide distribution range and the environment of the railway embankment is complex and diverse. The traditional battery power supply method can no longer meet the development needs of wireless sensor network nodes for long-term operation. The batteries located inside the railway embankment have limited power. , when the battery power is exhausted, the battery inside the r...

Claims

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Application Information

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IPC IPC(8): H02N2/18H02J7/34
CPCH02N2/18H02J7/345
Inventor 蔡德钩闫宏业陈晓斌魏少伟吕金侯文崎王业顺喻昭晟
Owner BEIJING TIEKE SPECIAL ENG TECH CO LTD