| 摘要 |
PROBLEM TO BE SOLVED: To measure low flow rate in liquid flow rate measurement with high sensivity and with accuracy. SOLUTION: A system for measurement of liquid flow rate comprises a collection vessel 20, coupled to a supply valve 42 and a drain valve 44, a weir 36 for supplying a liquid to the collection vessel 20, one or more load cells 24 and 28 coupled to the collection vessel 20, and a controller 50. The controller 50 computes the mass flow rate, according to a mass signal of the load cells 24 and 28 prior to liquid supply and a mass signal of the load cells 24 and 28 after the liquid supply, and a liquid supply time interval, and/or computes a volume flow rate from a liquid density. COPYRIGHT: (C)2005,JPO&NCIPI
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