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1. 发明授权

US5337604A Apparatus for measuring sap flow 失效
标题翻译：用于测量液流的装置
公开(公告)号：US5337604A
公开(公告)日：1994-08-16
申请号：US146877
申请日：1993-11-01
申请人： Cornelius H. M. Van Bavel , Michael G. Van Bavel
发明人： Cornelius H. M. Van Bavel , Michael G. Van Bavel
IPC分类号： G01F1/68 , G01F15/18 , G01N33/483
CPC分类号： G01F15/18 , G01F1/68 , G01N33/0098
摘要： A device for measuring sap flow in a stem region comprises a rigid housing, configured like a clam-shell, and insulated and sealed from intrusion from radiation or water or weather by a collar which circumscribes the housing situated around the stem region being measured. Enclosed within this housing is a substrate preferably constructed from a composite of foam tape and rubber gasket material to provide a means for the electronics to conform to a diversity of stem cross-sections and irregularities. Temperature-sensing electronics measure energy transferred from an internal heater strip to the ambient, to the stem region, and to measure heat flowing up the stem. Heat transfer related to sap flow in a stem region is determined from four signals, two signals provided by two pair of differential thermocouples, a signal generated from a thermopile, and a signal indicative of the millivoltage delivered to the heater.
摘要翻译：用于测量杆区域中的液流的装置包括刚性壳体，其被构造为类似蛤壳，并且被绝缘和密封以免受辐射或水侵入或天气的影响，所述套环环绕围绕被测量的杆区域的壳体。封装在该壳体内的是优选由泡沫胶带和橡胶垫片材料的复合材料构成的基底，以提供电子装置符合多样性的茎横截面和不规则性的装置。温度传感电子测量从内部加热器条传递到环境，到茎区域的能量，并测量从杆上流出的热量。与茎区域中的液流相关的热传递由四个信号确定，由两对差分热电偶提供的两个信号，从热电堆产生的信号和指示传送到加热器的毫伏的信号。

2. 发明授权

US5269183A Apparatus for measuring sap flow 失效
标题翻译：用于测量液流的装置
公开(公告)号：US5269183A
公开(公告)日：1993-12-14
申请号：US741293
申请日：1991-08-06
申请人： Cornelius H. M. Van Bavel , Michael G. van Bavel
发明人： Cornelius H. M. Van Bavel , Michael G. van Bavel
IPC分类号： G01F1/68 , G01F15/18 , G01N33/483
CPC分类号： G01F15/18 , G01F1/68 , G01N33/0098
摘要： A device for measuring the sap flow in herbaceous plants and trees directly without the necessity of an empirical calibration, using the heat balance method. A strap-on, removable, and reusable collar device powered by a 0.2 to 5.0 watt heater is abuttably affixed to the periphery of a stem or trunk. A plurality of temperature sensors are embedded in a weatherproof collar and shield assembly and are automatically processed by a small battery-operated recorder which also periodically stores in its memory the sap flow rate and the accumulated total thereof. These sap flow rate records may be obtained periodically for further analysis. A method is also provided for mass production thereof.
摘要翻译：使用热平衡法，用于直接测量草本植物和树木中的液流的装置，而不需要经验校准。由0.2至5.0瓦加热器供电的带式可拆卸和可重复使用的衣领装置可靠地固定在杆或躯干的周边。多个温度传感器嵌入在防风雨环和屏蔽组件中，并由一个小电池供电的记录器自动处理，该记录器还在其存储器中周期性地存储液流速率及其累积总数。可以定期获得这些液流速率记录以进行进一步分析。还提供了一种用于其批量生产的方法。

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