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

Abstract

The invention provides a wireless passive self-energized atmospheric environment sensor array and a preparation method thereof. The sensor array comprises a rotating shaft, polymer rotors, metal receiving poles, gas sensing films, lead wires, and a base. The sensor array realizes an environmental energy collection-wireless energy transmission-spontaneous active detection integrated detection system which can be driven simultaneously only by the external mechanical movement, and independent work without an external power supply is achieved. The external mechanical energy is collected by the polymer rotors. The energy is wirelessly transmitted to a back-end collecting end in the form of a time varying electric displacement field. A specific gas sensing reaction is modulated in the output electrical signal at an energy conversion interface so as to meet the requirement of the wireless passive self-energized real-time monitoring for the atmospheric environment, and lay a solid theoreticaland technical foundation for the development of an atmospheric environment monitoring network and system.

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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