Skip to main content
Fig. 3 | Plant Methods

Fig. 3

From: Non-destructive real-time monitoring of underground root development with distributed fiber optic sensing

Fig. 3

Digital signal processing on a sample data recording radish growth. (a) Comparison of time-series spatial averages of FOS placed in the air and the soil and set temperatures of the growth chamber. Raw signals from the FOS in the soil were adjusted for the thermal expansion of PTFE (125 µε °C− 1), which is approximately 220 times larger than silica (0.55 µε°C− 1). (b) The background physical strain indicated by the temporal average along FOS during the pre-germination period. (c) Distributed strain recording for the full FOS length before signal processing. (d) Distributed strain recording for the underground portion of FOS after signal processing

Back to article page

Plant Methods

ISSN: 1746-4811