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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Model		BZJ-1100s	BZJ-1300S	BZJ-1300L	BZJ-1450S	BZJ-1450L	BZJ-1600L
Max. Paper Size W*L(mm)		1100×1100	1300×1100	1300×1300	1450×1100	1450×1300	1600×1450
Mini. Paper Size W*L(mm)		350×350	350×350	350×350	350×350	350×350	350×350
bottom paper	Minimum basis weight(g/m2)	300	300	300	300	300	300
	Maximum basis weight(g/m2)	800	800	800	800	800	800
	maximum Thickness(mm)	10	10	10	10	10	10
Face paper	Minimum.basis weight(g/m2)	180	180	180	180	180	180
	maximum basis weight(g/m2)	800	800	800	800	800	800
Paperboard-paperboard Laminated error Coverage		±1mm	±1mm	±1mm	±1mm	±1mm	±1mm
Paperboard- Corrugated Board Laminated error Coverage		±1.5mm	±1.5mm	±1.5mm	±1.5mm	±1.5mm	±1.5mm
Total Power(kw)		12	12	13	13	13	13
Speed(P/M)		0-100	0-100	0-100	0-100	0-100	0-100
Machine length(m)		12.5	12.5	14.8	12.5	14.8	15.1
Total weight(kg)		5300	5600	5900	5900	6200	6500

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