Self-powered vehicle exhaust sensor array based on displacement current and its preparation method

Abstract

The invention provides a self-powered automobile exhaust sensor array based on displacement current and a preparation method thereof. The sensor array includes a rotating shaft, a polymer rotor, a polymer stator, a metal receiving electrode, a gas-sensitive film, an air inlet, an air outlet, lead wires and Gas test chamber, the advantage of the present invention is that: the mechanical energy collected by the axle of the automobile can be wirelessly sent to the gas sensor unit at the exhaust pipe to spontaneously and actively detect the automobile exhaust, which improves the configuration flexibility and individual mobility of the sensor , the invention proposes that the detection structure is completely based on the energy collection-transmission mechanism and method of polymer materials, without any metal electrodes and wiring connections, thus simplifying the device structure and integration process, and further improving the compatibility between the energy module and the sensor array. The invention proposes a displacement current-based self-powered vehicle exhaust sensor array with simple preparation process, novel structure, low cost, high practicability, and fully utilizes the energy of nature.

Description

technical field [0001] The invention relates to the fields of energy collection technology, microelectromechanical systems (MEMS), and electronic polymer sensitive materials, in particular to a displacement current-based self-powered vehicle exhaust sensor array and a preparation method thereof. Background technique [0002] With the rapid increase of car ownership, vehicle exhaust emissions are becoming one of the important sources of urban air pollution. Current research shows that NO in vehicle exhaust 2 Convert to NHO 3 One of the most sensitive indicators of the acute reaction of the human body is acute eye irritation. The human respiratory system is the organ most directly in contact with automobile exhaust. Long-term exposure to automobile exhaust will reduce the immunity of the respiratory system, followed by the onset of bronchitis, chronic bronchitis and other related diseases. In addition, automobile exhaust has adverse effects on the immune system and reproduc...

AI Technical Summary

Problems solved by technology

At present, the 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, which not only increases economic costs, but also greatly reduces the movement of sensor network nodes adaptability to the environment

2) In order to detect and distinguish automobile exhaust with mixed components, 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 only relying on battery power cannot meet the long-term work requirements of such sensor nodes

3) It is difficult for wired power transmission technology to transfer energy to certain extreme environments and dangerous places, which severely limits the construction and layout 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

[0007] In order to solve the problems of short life, high power consumption, and external power supply of traditional gas sensors, an energy collection-transmission mechanism and method based entirely on polymer materials was invented, which does not require any metal electrodes and wire connections, thus simplifying device structure and integration. technology, which further improves the compatibility of energy modules and sensor arrays, making up for the shortcomings of current research

[0008] In addition, the current self-driven gas sensors require external energy sources to act directly on the device, that is, the spatial range of energy collection can only be limited to the sensor position, and the environmental energy outside the device position cannot be collected, so it is greatly weakened. Its scope of application and space utilization

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