Hong Kong Polytechnic University invention can spray nano-composite sensor
Recently, the research team at Hong Kong Polytechnic University has developed a brand new nanocomposite sensor that can be sprayed directly onto flat or curved engineering structures such as train tracks and aircraft structures. Sprayed sensors further form the sensor network to provide real-time and rich structural health status information to the monitored structures.
Hong Kong Polytechnic University developed nano-composite sensor
It is reported that nanocomposite sensors developed by Professor Su Chung-king, Professor Zhou Limin and their team led by the Department of Mechanical Engineering at PolyU Department of Chemical Engineering have adopted innovative spraying technology to make the sensor installation process more efficient and efficient than the traditional methods. This new technology also makes the sensor suitable for a wide range of engineered surfaces, increasing its flexibility. Professor Su said that the new nanocomposite sensor can take into account both the cost of the sensor and the amount of data captured by the sensor network at the same time. In order to realize in-situ vibration sensing, the ultrasonic-based structural health monitoring technology opens up new ideas .
Su Chung-ching, a professor of mechanical engineering at PolyU, said that the newly developed nanocomposite sensor could be connected to the sensor network via a circuit.
Can reduce costs and increase sensitivity
The nanocomposite sensor is made of carbon black, two-dimensional graphene, conductive nano-particles and polyvinylidene fluoride, which can be easily and flexibly made into different sizes according to various engineering applications. The new nanocomposite sensor senses the structural changes sensitively by optimizing the nanostructures of the mixture, recognizing the nanocomposite's feedback on different piezoresistives. In this new technology, each sensor is connected to the network by wires printed on the structure. By analyzing and comparing electrical signals converted from resistivity, defects in the structure can be detected while the signal is converted to a three-dimensional image .
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