Traditional wireless sensors still face challenges such as high power consumption and bulky signal transmission modules.In this work,we report a battery-free sensor via Maxwell’s displacement current for encrypted si...Traditional wireless sensors still face challenges such as high power consumption and bulky signal transmission modules.In this work,we report a battery-free sensor via Maxwell’s displacement current for encrypted signal transmission.The sensor employs an instantaneous discharge triboelectric nanogenerator(ID-TENG)featuring a dual-contact electrode structure.It enables rapid charge transfer and instantaneous current generation(~6 ms per cycle)and then high-frequency electromagnetic wave generation.The instantaneous discharge mechanism reduces the generated voltage to 100 V while maintainingμA-level current output,addressing critical safety concerns.By integrating a resistor‒inductor‒capacitor(RLC)equivalent circuit,the sensor achieves precise amplitude and frequency modulation of wireless signals.A series of inductors(0-50μH)is used to achieve wide frequency-domain regulation(3.91-16.97 MHz),and capacitor parallel regulation(0-50 pF)to achieve accurate regulation in the narrow frequency domain(1.95-2.63 MHz).The sensor illustrates 22 m of wireless transmission distance and sustained stability over 16,000 cycles.By pre-setting the frequency sequence of the signal as a password,the specific password transmits the specific information to realize the encryption of the wireless signal transmission.Finally,it is demonstrated to be used as a smart wireless keyboard,an interactive dance carpet and an encrypted vehicle control system with passivity,adaptability,scalability,and resistance to signal interference.展开更多
基金supported by the National Key R&D Program of China(No.2023YFB3208100)the National Natural Science Foundation of China(No.62174115,No.U21A20147)+3 种基金the Natural Science Foundation of Jiangsu Province of China(No.BK20240152)the Natural Science Foundation of the Jiangsu Higher Education Institutions of China(No.24KJA430011)the Collaborative Innovation Center of Suzhou Nano Science&Technology,the 111 Projectthe Joint International Research Laboratory of Carbon-Based Functional Materials and Devices.
文摘Traditional wireless sensors still face challenges such as high power consumption and bulky signal transmission modules.In this work,we report a battery-free sensor via Maxwell’s displacement current for encrypted signal transmission.The sensor employs an instantaneous discharge triboelectric nanogenerator(ID-TENG)featuring a dual-contact electrode structure.It enables rapid charge transfer and instantaneous current generation(~6 ms per cycle)and then high-frequency electromagnetic wave generation.The instantaneous discharge mechanism reduces the generated voltage to 100 V while maintainingμA-level current output,addressing critical safety concerns.By integrating a resistor‒inductor‒capacitor(RLC)equivalent circuit,the sensor achieves precise amplitude and frequency modulation of wireless signals.A series of inductors(0-50μH)is used to achieve wide frequency-domain regulation(3.91-16.97 MHz),and capacitor parallel regulation(0-50 pF)to achieve accurate regulation in the narrow frequency domain(1.95-2.63 MHz).The sensor illustrates 22 m of wireless transmission distance and sustained stability over 16,000 cycles.By pre-setting the frequency sequence of the signal as a password,the specific password transmits the specific information to realize the encryption of the wireless signal transmission.Finally,it is demonstrated to be used as a smart wireless keyboard,an interactive dance carpet and an encrypted vehicle control system with passivity,adaptability,scalability,and resistance to signal interference.
