无线茎流传感器的研究

Research on Wireless Stem Flow Sensor

蒸腾量是反映植物生理信息最重要的因素之一,通过包裹式的加热探头给茎杆加热,由温度测量探头来确定茎流的热传输量以推算出植物的蒸腾量,提出了一种基于ZigBee技术的非侵入式无线茎流传感器。并给出了茎流传感器的软硬件设计方案,将传感器探头部分与ZigBee模块集成,实现了具有ZigBee网络功能的无线茎流传感器。经与以色列的PHYTALK茎流传感器对比性实验,其结果表明:两者的相关性为0.938,而ZigBee茎流传感器具有更高的灵敏度。

Transpiration rate is one of the most important factors that reflect the plant physiological information. This paper puts forward a kind of non-ablative wireless stem flow sensor on ZigBee,which heats up the stalk by the enwrapped calefaction probe and decides the heat transfer quantity of stem flow by the value of the temperature probe to calculate the plant transpiration rate. This paper presents the software and hardware design of stern flow sensor and integrates the ZigBee module,which makes the stem flow sensor have network ability. The comparative experiments between the wireless stem flow sensor and the Israel PHYTALK stern flow sensor show that the correlation coefficient is 0. 938 and the wireless stem flow sensor on ZigBee has a higher sensitivity.