John Gerard Daly,Edmond Patrick Harty,Christopher Kinsella
申请号：
US15023147
公开号：
US10480975B2
申请日:
2014.09.19
申请国别(地区):
US
年份:
2019
代理人:
摘要：
The mass flow rate of milk flowing in a pipe in pulsed milk slugs is determined by sampling a signal from a microphone indicative of sonic signals produced by the milk flow. A microprocessor applies a Fast Fourier Transform to the sampled signal to produce the frequency domain of the sampled signal. The microprocessor computes the average energy value of the sampled signal in a relevant frequency band during consecutive monitoring periods. The average energy values are inserted into a calibration equation to convert the average energy value to a mass flow rate. The total mass flow of milk flowing through the pipeline during a period T1-T2 is determined by integrating the determined mass flow rate of milk from T1-T2. Disengagement of a milking cluster from the animal teats during milking is determined when the monitored microphone signal transitions to a continuous relatively high energy noise signal indicative of air.
