Department of Civil and Environmental Engineering, University of Pittsburgh, 3700 O'Hara Street 941 Benedum Engineering Hall, Pittsburgh, PA 15261, USA.
Sensors (Basel). 2012;12(1):954-71. doi: 10.3390/s120100954. Epub 2012 Jan 16.
This work provides a design for two types of sensors, based on the thermal dissipation and heat ratio methods of sap flow calculation, for moderate to large scale deployments for the purpose of monitoring tree transpiration. These designs include a procedure for making these sensors, a quality control method for the final products, and a complete list of components with vendors and pricing information. Both sensor designs were field tested alongside a commercial sap flow sensor to assess their performance and show the importance for quality controlling the sensor outputs. Results show that for roughly 2% of the cost of commercial sensors, self-made sap flow sensors can provide acceptable estimates of the sap flow measurements compared to the commercial sensors.
本工作提供了两种基于热耗散和热比方法的传感器设计，用于中等至大规模的部署，以监测树木蒸腾。这些设计包括制造这些传感器的程序、最终产品的质量控制方法以及带有供应商和定价信息的完整组件列表。这两种传感器设计都与商业 sap 流传感器一起进行了现场测试，以评估它们的性能并展示对传感器输出进行质量控制的重要性。结果表明，与商业传感器相比，自制 sap 流传感器的成本仅为商业传感器的约 2%，但可以提供可接受的 sap 流测量估计值。
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