| 摘要 |
A volume flow meter for measuring volume flow of a multiphase fluid, particularly milk in a milking installation, is disclosed. The flow meter comprises a sensor chamber 20 and a feed duct 10 for conveying fluid to the sensor chamber. The feed duct is shaped such that the fluid leaving the feed duct has a character that is more nearly in a pure liquid phase than the fluid entering the feed duct. For example, this may be achieved by forming the feed duct into the shape of an inverted 'U' 14. An assessment of total volume flow is made by combining measurements of presence or absence of liquid in multiple regions of the cross-section of the sensor chamber. Optionally, there may be a second sensor chamber disposed upstream of the feed duct, used to provide information to control the sensors in the first chamber. A method for calibrating the flow meter is also disclosed. |
