Wireless passive self-powered atmospheric environment sensor array and preparation method thereof

Abstract

The invention provides a wireless passive energy-supplied atmospheric environment sensor array and its preparation method. The sensor array includes a rotating shaft, a polymer rotor, a metal receiving electrode, a gas-sensitive film, a lead wire and a base. The environmental energy harvesting-wireless energy transmission-spontaneous active detection integrated detection system that can be driven simultaneously can work independently without external power supply, collect external mechanical energy through the polymer rotor and transfer the energy wirelessly in the form of time-varying electric displacement field It is transmitted to the back-end collection end, and the specific gas-sensing response is modulated in the output electrical signal at the energy conversion interface, which has met the requirements for real-time monitoring of the wireless passive energy supply of the atmospheric environment, and is a great contribution to the development of the atmospheric environment monitoring network and system. Lay a solid theoretical and technical foundation.

Description

technical field [0001] The invention relates to the fields of energy collection technology, micro-electro-mechanical systems (MEMS), and electronic polymer sensitive materials, in particular to a wireless passive source-powered atmospheric environment sensor array and a preparation method thereof. Background technique [0002] Air pollution control is the primary aspect of developing an eco-city and building an ecological civilization. Nitrogen oxides (NOx) and sulfur dioxide (SO 2 ) is not only the main component of smog, but also the precursor of particles such as PM2.5 and acid rain. According to statistics, there are currently about 1.6 billion urban populations living in harsh atmospheric environments that are harmful to health. In July 2015, the General Office of the State Council issued the "Eco-environmental Monitoring Network Construction Plan", marking that my country's atmospheric monitoring technology system has entered the refined control stage of the Internet...

AI Technical Summary

Problems solved by technology

[0004] The disadvantages and defects of gas sensors currently used in the Internet of Things are as follows: ①The sensors currently developed and produced all use batteries or wired power transmission to supply energy, requiring personnel to regularly replace batteries and maintain the power grid to ensure the continuous operation of the network. economic cost, and greatly reduces the mobility and environmental adaptability of sensor network nodes

②In order to detect and distinguish mixed gases in the environment, gas sensors are often formed into an array to improve the selectivity of the sensors, which leads to a very large energy consumption of the entire node, and battery power alone cannot meet the long-term work requirements of such sensor nodes

③Wired power transmission technology is difficult to transfer energy to some extreme environments and dangerous places, which seriously limits the construction and application of IoT nodes

However, such technologies are usually implemented through induction coils and / or antennas, and are mainly used in low-power applications, such as charging small electronic devices such as mobile phones and MP3s, and are difficult to directly integrate with sensor network nodes

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