Journal
ACS NANO
Volume 14, Issue 5, Pages 5981-5987Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.0c01436
Keywords
triboelectric nanogenerator; magnetic flap; difunctional sensor; pneumatic flow; liquid level
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Funding
- National Natural Science Foundation of China [51775130]
- National Key RAMP
- D Project from the Minister of Science and Technology [2016YFA0202704]
- Beijing Municipal Science and Technology Commission [Z171100002017017]
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In recent years, the triboelectric nanogenerator (TENG) has attracted increasing attention because it not only converts various mechanical energy into electrical energy but also produces electrical signals as responses. On the basis of the TENG, a magnetic flap type difunctional sensor (MFTDS) has been developed to detect pneumatic flow and liquid level. Consisting of an outer magnetic flap, an inner magnetic float, and a conical cavity, its working mechanism and output characteristics were studied. The MFTDS detects pneumatic flows from 10 to 200 L/min with a flow resolution of 2 L/min. Compared with a commercial flow switch, the MFTDS results are in good agreement. Moreover, the MFTDS detects changes in liquid levels. The effects of liquid level height and flow rate on the performance of the MFTDS were measured and compared with a commercial liquid-level sensor. The results indicate that the output voltage of the MFTDS varies linearly with height but is independent of flow rate. The heights of liquid level from 30 to 130 mm were effectively detected. This work promotes the prospect for multifunctional triboelectric sensors.
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