Self-energized automobile exhaust sensor array based on displacement current and preparation method thereof

Abstract

The invention provides a self-energized automobile exhaust sensor array based on displacement current and a preparation method thereof. The sensor array comprises a rotating shaft, polymer rotors, polymer stators, metal receiving poles, gas sensing films, an air inlet, an air outlet, lead wires, and a gas testing cavity. The advantages of the sensor array are that: the mechanical energy collectedby an automobile axle can be wirelessly transmitted to a gas sensing unit at an exhaust pipe to spontaneously and actively detect automobile exhaust in an air crossing manner, thereby improving the configuration flexibility and individual mobility of a sensor. A detection structure provided by the invention is completely based on the energy collection-transmission mechanism and method of polymer materials, and does not need any metal electrodes and line connection, thereby simplifying a device structure and an integration process, and further improving the compatibility of an energy module andthe sensor array. The self-energized automobile exhaust sensor array based on the displacement current has simple preparation process, novel structure, low cost, and high practicability. The energy in nature is fully utilized.

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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