单针热脉冲法在树干液流监测中的应用

Application of single-probe heat pulse method in monitoring of sap flow

设计了一种单针热脉冲树干液流监测仪,实现了树干液流的实时监测及相关数据的本地存储和远程传输。通过对单棵银杏树和无患子树的监测,与基于热比率方法的仪器相比,监测结果的决定系数R^(2)分别为0.984和0.947,均方根误差(RMSE)分别为2.85和6.29。同时,简要分析了树干液流的影响因子。在测量时,所设计的仪器仅需使用单针,相比现有的监测设备,具有操作简单,性能稳定,功耗低,携带方便等优点,在树干液流的监测上有很好的应用前景。

A single-probe heat pulse sap flow monitor is designed,which realizes the real-time monitoring of sap flow and the local storage and remote transmission of related data.Through the monitoring of a single ginkgo and a Sapindus,compared with the instrument based on the heat ratio method,the determination coefficient R^(2) of the monitoring results are 0.984 and 0.947,respectively;and the root mean square error(RMSE)is 2.85 and 6.29,respectively.And the influencing factors of sap flow is briefly analyzed.In the measurement,the designed instrument only needs a single probe.Compared with the existing monitoring equipment,it has the advantages of simple operation,stable performance,low power consumption,and convenient carrying.It is a very good application prospect in the monitoring of sap flow.