Power supply device for tunnel monitoring system

Abstract

The invention relates to a power supply device for a tunnel monitoring system, and belongs to the technical field of new energy. The device mainly comprises a rack, a swing frame, a coupler, an elastic vibrator and an isolator; an electric control cavity and two transduction cavities are formed in the rack, the swing frame is composed of a seat plate, a swing arm and an excitation cavity shell, and a magnet is embedded in the inner wall of the excitation cavity shell; the isolator is composed of a wedge body and a cambered surface body; an end cover is arranged at the end part of the transduction cavity and extrudes the isolator and the elastic vibrator in the transduction cavity; the fixed end of the elastic vibrator and the wedge surface of the isolator extrude each other; the elastic vibrator is composed of a substrate and transduction pieces bonded to the two sides of the substrate; when the transduction plate is a movable friction plate, a fixed friction pair is embedded in the sinking cavity of the isolator, and the fixed friction pair is an independent fixed electrode plate or is formed by bonding the fixed electrode plate and a fixed friction plate; the swing frame is arranged on the rack through a reed, and the coupler is arranged on a seat plate of the swing frame; and when airflow flows through, the coupler drives the swing frame and the magnet to swing in a reciprocating mode, and the elastic vibrator generates reciprocating bending deformation under the action of the magnet and converts mechanical energy into electric energy.

Description

technical field [0001] The invention belongs to the technical field of new energy, and in particular relates to a power supply device for a tunnel monitoring system. Background technique [0002] Tunnels have become an important part of the current road and rail network. In order to ensure the normal and safe passage of cars and trains and to realize the real-time monitoring of the tunnel environment and passing vehicles, various instruments and lighting facilities need to be installed in the tunnel, so there must also be corresponding power supply facilities in the tunnel. At present, cables are commonly used for power supply. The laying of cables and subsequent maintenance are difficult and costly. The most critical thing is that the monitoring system will not be able to operate normally when the power supply system fails. Therefore, people have successively proposed various forms of devices that utilize tunnel airflow to generate electricity, and generate electricity thr...

AI Technical Summary

Problems solved by technology

The airflow in the tunnel can be formed by air convection, or it can be the air flow caused by the high-speed driving of the vehicle. Therefore, the flow velocity of the airflow in the tunnel changes greatly, which seriously restricts the effective use of the existing tunnel airflow power generation device: when the airflow velocity is low, it cannot be Effective excitation, easy to damage due to excessive amplitude when the airflow velocity is too high

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