Wearable Shallow Temperature Sensor for Greenhouse Plants in Smart Agriculture
The characteristic of flexible sensors being able to be seamlessly attached to uneven surfaces of the measured object makes them widely applicable in fields such as information,energy,healthcare,national defense,and agriculture.This article describes the preparation of a graphene/polydimethylsiloxane(PDMS)composite material with a positive temperature coefficient of resistance,and developing a flexible temperature sensor using it.The graphene/PDMS sensor exhibits a linear positive resistance temperature coefficient within the temperature range of 15～80℃,with a linear coefficient of 0.049.The fitting degree is good,and it has good reproducibility and stability.The resistance fluctuation is small within the range of 0.05%～0.08%,and it can also measure temperature well in high humidity environments.The reliability of flexible thermometers in plant applications has been tested,and it can be foreseen that flexible temperature sensors based on graphene/PDMS can achieve the application of plant leaf temperature measurement,which has great potential in precision temperature measurement in smart agriculture.
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