Self-powered pumping switched TENG enabled real-time wireless metal tin height and position recognition and counting for production line management

• Published in: Nano energy 2021-12, Vol.90, p.106544, Article 106544
• Main Authors: Chen, Jinkai, Liao, Ziyu, Wu, Yun, Zhou, Hao, Xuan, Weipeng, Dong, Shurong, Luo, Jikui
• Format: Article
• Language: English
• Subjects: Decayed resonant signal; Magnetic sensor; Self-powered; Triboelectric; Wireless sensing
• ISSN: 2211-2855
• DOI: 10.1016/j.nanoen.2021.106544

Harvesting high entropy energy using triboelectric nanogenerator (TENG) has attracted more and more attentions. For normal self-powered wireless sensing applications, a significant portion of harvested energy will be consumed by the subsequent power management and wireless communication units, leading to the incapability of real-time wireless sensing. In this paper, we proposed a pumping switched TENG (PSW-TENG) for real-time wireless sensing. An inductor magnetic sensor coil integrated with the TENG forms a LC resonant circuit, converts the pulsed output of TENG into resonant signal with the encoded sensing information，which is significantly boosted using an integrated microswitch and a charge pump, and then transmitted via a laser diode up to 2 m. The sensor system has been utilized to detect metallic components passing through. The self-powered metal component monitoring system has a height recognition sensitivity of 11.7 kHz/mm and a horizontal position recognition sensitivity of 5.6 kHz/mm with the largest error of 8.5 kHz, showing good sensitivity and stability. Based on the sensing system, the types and passing number of tins on a conveyor can be simultaneously identified and counted. All the results have demonstrated the great potential of the real-time self-powered wireless sensing system for production line management. A rotational TENG is significantly enhanced by charge pump and integrated synchronous microswitch, which can generate electricity to power itself, perform real-time tin height and position recognition and counting for production line management and wireless transmission up to 2 m. [Display omitted] •A rotational charge pump and integrated microswitch enhanced TENG is designed for self-powered real-time wireless sensing.•The self-powered system uses a coil to perform real-time tin vertical height and horizontal position recognition.•The self-powered wireless sensing system can transmit optical signal up to 2 m without severe performance deterioration.