Radiation distribution measurement for forest plant canopies tracing

Xuefen Wan; Jian Cui; Yi Yang; Hui Liu

doi:10.1117/12.999521

26 November 2012 Radiation distribution measurement for forest plant canopies tracing

Xuefen Wan, Jian Cui, Yi Yang, Hui Liu

Proceedings Volume 8557, Optical Design and Testing V; 85571F (2012) https://doi.org/10.1117/12.999521
Event: Photonics Asia, 2012, Beijing, China

Abstract

Plant canopies structures are important biophysical parameters required in many ecological and climate models. To obtain precise canopies characteristic, the radiation distribution in forest gap should be tracing. In this paper, a radiation transmission measuring method with gyroscope correction for forest gap radiation distribution measurement is present. And a Zigbee wireless network is imbedded for communicating between portable full-trace radiation detector and host computer. Using the solar beam as a probe, the measuring nodes collect radiation distribution in forest gap. Because the constant pace of operator in forest and other outdoor occasion is hard to validate, radiation distribution curves suffer some error. We present a Forest radiation distribution meter with Gyro correction for TRAC measuring. In this meter, A Gyroscope records transect route data and provide speed correction for canopy gaps curve in tracing route. A Microchip PIC16F877 MCU is employed for radiation data collection. The collected data is sent to central station by Zigbee wireless network or CF376 in-line USB flash drives/SD card. Solar radiation spike data and other environment parameters (Temperature and Humidity) are sampled simultaneously. So the gap removal processes suffer less error. A portable node provides full-trace radiation distribution. Host computer can get potential relationship in tracing-line LAI and FPAR and compute them in long-term. A portable full-trace radiation detector and host computer is tested. The experimental results show our design could be a competitive candidate for radiation distribution measurement for forest plant canopies tracing.

Citation Download Citation

Xuefen Wan, Jian Cui, Yi Yang, and Hui Liu "Radiation distribution measurement for forest plant canopies tracing", Proc. SPIE 8557, Optical Design and Testing V, 85571F (26 November 2012); https://doi.org/10.1117/12.999521

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KEYWORDS

Gyroscopes

Solar radiation

Sensors

Monte Carlo methods

Climatology

Fermium

Humidity

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