In order to more effectively monitor the health of composite structures,a fuzzy fiber sensor has been developed.The fuzzy fiber is a bundle of glass fibers with carbon nanotubes or nanofibers(CNTs or CNFs)grown on the...In order to more effectively monitor the health of composite structures,a fuzzy fiber sensor has been developed.The fuzzy fiber is a bundle of glass fibers with carbon nanotubes or nanofibers(CNTs or CNFs)grown on the surface.The nanotube coating makes the fiber bundle conductive while the small conductive path increases sensitivity.The fuzzy fiber sensor can replace conventional metal foil strain gauges in composite applications.The electrical response of the sensor is monitored in real time to measure strain,vibration,cracking and delamination.Continuous monitoring provides instant notification of any problems.Implementation of this sensor network in a composite can increase service life,decrease maintenance costs and greatly reduce inspection downtime.展开更多
Flexible and wearable strain sensors for human-computer interaction,health monitoring,and soft robotics have drawn widespread attention to promising applications in the next generation of artificial intelligence devic...Flexible and wearable strain sensors for human-computer interaction,health monitoring,and soft robotics have drawn widespread attention to promising applications in the next generation of artificial intelligence devices.However,conventional semiconductor sensors are difficult to meet the requirements of flexibility and stretchability.Here,we reported a kind of novel and simple sensor based on layer-by-layer(LBL)method.Carbon nanotubes(CNTs)layer provides high ductility and stability in the process of tension sensing,while silver layer provides low initial resistance and fast reflecting in the process of tension sensing.LBL method ensures the uniformity of the conductive layer.The sensor has superior sheet resistance of 9.44Ω/sq.,high elongation at break of 104%.For sensing capability,the sensor has wide reflecting range of 60%,high gauge factor(GF)of 1000 up to 60%strain,fast reflecting time of 165 ms.Excellent reliability and stability have also been verified.It is also worth mentioning that the entire process does not require any expensive equipments,complicated processes or harsh experimental conditions.The above features provide an idea for large-scale application of flexible stretchable sensors.展开更多
基金supported by US Airforce AFOSR funds under contract number FA9550-09-1-0686.
文摘In order to more effectively monitor the health of composite structures,a fuzzy fiber sensor has been developed.The fuzzy fiber is a bundle of glass fibers with carbon nanotubes or nanofibers(CNTs or CNFs)grown on the surface.The nanotube coating makes the fiber bundle conductive while the small conductive path increases sensitivity.The fuzzy fiber sensor can replace conventional metal foil strain gauges in composite applications.The electrical response of the sensor is monitored in real time to measure strain,vibration,cracking and delamination.Continuous monitoring provides instant notification of any problems.Implementation of this sensor network in a composite can increase service life,decrease maintenance costs and greatly reduce inspection downtime.
基金financially supported by the National Natural Science Foundation of China(No.51403115)。
文摘Flexible and wearable strain sensors for human-computer interaction,health monitoring,and soft robotics have drawn widespread attention to promising applications in the next generation of artificial intelligence devices.However,conventional semiconductor sensors are difficult to meet the requirements of flexibility and stretchability.Here,we reported a kind of novel and simple sensor based on layer-by-layer(LBL)method.Carbon nanotubes(CNTs)layer provides high ductility and stability in the process of tension sensing,while silver layer provides low initial resistance and fast reflecting in the process of tension sensing.LBL method ensures the uniformity of the conductive layer.The sensor has superior sheet resistance of 9.44Ω/sq.,high elongation at break of 104%.For sensing capability,the sensor has wide reflecting range of 60%,high gauge factor(GF)of 1000 up to 60%strain,fast reflecting time of 165 ms.Excellent reliability and stability have also been verified.It is also worth mentioning that the entire process does not require any expensive equipments,complicated processes or harsh experimental conditions.The above features provide an idea for large-scale application of flexible stretchable sensors.
