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A Self-Driven Wireless Traffic Detector Based on Electromagnetic-Frictional Hybrid Nanogenerator

A nano-generator, traffic flow technology, applied in friction generators, traffic flow detection, instruments, etc., can solve problems such as environmental pollution, energy consumption, installation and maintenance difficulties, etc., to reduce costs, improve output power, and reduce costs. Effect

Active Publication Date: 2018-08-17
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The effective operation of the intelligent transportation system is inseparable from the real-time and accurate monitoring of the traffic flow. The current traffic flow detectors all need a direct power supply, which produces unnecessary energy consumption and environmental pollution. There are also greater difficulties

Method used

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  • A Self-Driven Wireless Traffic Detector Based on Electromagnetic-Frictional Hybrid Nanogenerator
  • A Self-Driven Wireless Traffic Detector Based on Electromagnetic-Frictional Hybrid Nanogenerator
  • A Self-Driven Wireless Traffic Detector Based on Electromagnetic-Frictional Hybrid Nanogenerator

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] see figure 1 , the self-propelled wireless traffic detector based on the electromagnetic-friction hybrid nanogenerator includes the first electrode layer 103 covered on the plastic lower plate 104 and the second electrode layer 101 covered on the plastic upper plate 105 and the friction layer 102 , coil 108 covered on the plastic lower plate 104 and magnet 107 covered on the plastic upper plate 105 , wind power turntable 210 driving the rotation of the rotor, wireless transmitter 109 and receiver 110 .

[0030] The plastic plates 105 and 104 have a certain mechanical strength and thickness. When the vehicle passes by, the wind power turntable 210 drives the plastic upper plate 105 to rotate, and the magnetic flux in the coil 108 changes due to the rotation of the magnet 107, and a changing current is generated in the coil 108. At the same time, Due to the friction between the first electrode layer 103 and the friction layer 102, there is a pulse electrical signal output...

Embodiment 2

[0045] The structure of the traffic flow detector in this embodiment is specifically introduced. see figure 1 , the friction layer 102 adopts polytetrafluoroethylene (PTFE) film material with nano-array surface modification, and its thickness is 25-50 microns, and a copper film is plated on the other side of the PTFE material as the second electrode layer 101, the first The electrode layer 103 adopts the aluminum foil material with nanohole array surface modification, and its thickness is 20-50 microns, and the polymer polymethyl methacrylate (PMMA) with a thickness of 500-1000 microns is used as the plastic 104, 105 and the wind rotating disk 210. Materials, the magnet 107 is made of NdFeB material, and the coil 108 is made of copper enameled wire;

[0046] In this embodiment, the material selection of each part of the detector is the same as that in the first embodiment, and will not be repeated here, and the working principle of the detector is also the same as that in the...

Embodiment 3

[0048] The initial electrical signal output by the generator part of each embodiment of the present invention is an AC pulse electrical signal, which becomes a DC signal after passing through the rectification circuit, and the rectification circuit is as follows: Figure 4 As shown, the output electrical signal of the friction nanogenerator becomes a DC signal after passing through the transformer and the rectifier bridge, and the output electrical signal of the electromagnetic generator directly becomes a DC signal through the rectifier bridge. The total electrical signal output obtained by connecting two generators in parallel is The wireless transmitter is powered.

[0049] When the rotating speed is 500 revolutions per minute, open-circuit voltage and short-circuit current were measured for the triboelectric nanogenerator part, the electromagnetic generator part and the output after power management in this embodiment, and the results are as follows: Figure 5-7 and Figu...

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Abstract

The invention discloses a self-driven wireless vehicle flow detector based on an electromagnetic-friction hybrid nanogenerator, comprising: an integrated electromagnetic generator and a frictional nanogenerator, a wireless transmitting device and a receiving device. Use the power management circuit to gather the electrical signal output of the electromagnetic generator and the friction nanogenerator together to supply power to the wireless transmitter. The wind energy generated by the vehicle will drive the generator to rotate, thereby generating a pulse current, and the wireless transmitter will transmit the electrical signal. to the receiving device, the receiving device counts once. The invention can realize long-term effective traffic flow detection in remote areas such as tunnels and highways.

Description

technical field [0001] The invention relates to a traffic flow detector, in particular to a self-driven traffic flow detector which converts wind energy generated by passing vehicles into electrical energy without an external power supply. Background technique [0002] With the development of the national economy, traffic congestion has become a common phenomenon in the traffic of large and medium-sized cities, and the speed of urban infrastructure construction lags behind the growth rate of vehicles. As of 2013, the number of cars in the country was 137 million. The average increase is more than 11 million, which is 5.7 times the number of cars in 2003, while the urban roads only increase by 3-5% every year. The traffic safety situation is severe, and the traffic accidents cause huge economic losses every year. [0003] The intelligent transportation system effectively and comprehensively applies advanced information technology, data communication technology, sensor technol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08G1/01G08G1/065H02K35/04H02N1/04
CPCG08G1/01G08G1/065H02K35/04H02N1/04
Inventor 杨维清张彬彬靳龙张磊张海涛朱旻昊
Owner SOUTHWEST JIAOTONG UNIV
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