Sound insulation screen capable of achieving self-generating electricity

Abstract

The invention discloses a sound insulation screen capable of achieving self-generating electricity. The sound insulation screen capable of achieving self-generating electricity comprises a sound insulation wall, a foam thin film, a flexible induced electrode and a back induced electrode, wherein the foam thin film is arranged in the sound insulation wall and is provided with an static charge through a polarization treatment; the flexible induced electrode is connected with the surface of the side, close to a road, of the foam thin film and is capable of sensing an electric charge; and the back induced electrode is located at the side, far away from the road, of the foam thin film and is capable of sensing the electric charge. The foam thin film is an electret material or/and a ferroelectric material, and the foam thin film has flexibility, so that deformation occurs when the foam thin film is subject to external force; and a plurality of pores are formed in the foam thin film, when the foam thin film is deformed, output of the electric charge is generated due to size changing of the pores.

Description

technical field [0001] The present invention relates to a sound insulation barrier capable of self-generating. Background technique [0002] With the construction of a large number of roads and bridges, the traffic noise pollution of railways and highways is also becoming more and more serious. Setting noise barriers on both sides of roads (roads and railways) is a method that is widely used to reduce traffic noise. A sound insulation screen is a sound insulation facility. In order to block the direct sound between the sound source and the receiver, a facility is inserted between the sound source and the receiver, so that the sound wave propagation has a significant additional attenuation, thereby weakening the sound. The influence of noise in a certain area where the receiver is located. [0003] There are four common types of sound insulation barriers, namely resistive sound barriers, ordinary transparent sound barriers, microporous plate transparent sound barriers and co...

AI Technical Summary

Problems solved by technology

[0004] Disadvantages of the existing technology: 1. At present, the focus of noise reduction in China is to weaken the noise source and build a sound insulation barrier in the propagation path, ignoring the damage caused by the sound insulation barrier itself when it is subjected to cyclic loads The effect of noise reduction is weakened

The ultra-fine glass wool sound-absorbing materials that are widely used in China have low strength and are brittle and easy to break. The brittle fracture and dusting make the original homogeneous structure no longer exist, resulting in loosening and failure of bolts and connectors, and damage to the unit board of the sound insulation barrier. The sound insulation barrier fails to effectively absorb and reduce noise

[0005] 2. The daily maintenance workload is heavy and the efficiency is low

However, the internal damage of the sound insulation barrier is not easy to find, which increases the difficulty of daily maintenance, and will result in untimely maintenance and replacement, which is time-consuming and laborious

[0006] 3. There is a lack of a good early warning mechanism along the existing sound insulation barriers in China

Once the sound insulation barrier along the railway and expressway is damaged, if it is not repaired in time, there will be certain safety hazards in the absence of conspicuous warning signs

[0007] 4. Signal control, lighting requirements, electronic cameras, etc. along the highway (railway) need to lay cables separately from the nearby power supply bureau, which increases investment and operating costs and does not conform to the concept of environmental protection

With the rapid development of my country's railways, the coverage of the railway network is becoming wider and wider. It is impossible for the public power network to conveniently supply power to all power consumption sites along the railway. Connecting the power supply to the public power grid will generate high costs for grid construction and bring a lot of inconvenience to maintenance work

Although there is a special catenary for railway power supply along the railway line, because it is a single-phase high-voltage alternating current, and the voltage fluctuation range can reach -30% to +24%, and the electric locomotive will also cause voltage distortion of the catenary during operation. The quality of its power supply is significantly lower than that of the public power grid, and it is difficult to meet the power conversion requirements with ordinary power equipment

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