초록 ▼

A quantity meter for determining the quantity of liquid flowing through a line is provided with at least two electrically conducting elements arranged in the line spaced from each other and being in communication with an electronic circuit. This electronic circuit determines the quantity of liquid w

A quantity meter for determining the quantity of liquid flowing through a line is provided with at least two electrically conducting elements arranged in the line spaced from each other and being in communication with an electronic circuit. This electronic circuit determines the quantity of liquid which has flowed through the line on the basis of the electric conductivity of the liquid, the length of the interval of time during which a unit of milk passes between the two electrically conducting elements, the distance between the electrically conducting elements, the rate of flow of the liquid and the specific electrical resistance.

대표청구항 ▼

[ Having disclosed my invention, what I claim as new and to be secured by Letters Patent of the United States is:] [18.] A system for automatically milking an animal comprising:a milking robot, a computer, a milk glass, a milk tank, a pipe-line system, and a quantity meter,said milking robot control

[ Having disclosed my invention, what I claim as new and to be secured by Letters Patent of the United States is:] [18.] A system for automatically milking an animal comprising:a milking robot, a computer, a milk glass, a milk tank, a pipe-line system, and a quantity meter,said milking robot controlled by said computer,said milking robot comprising a teat cup, means for connecting and disconnecting said teat cup to and from a teat of said animal, means for obtaining milk from said teat via said teat cup, and means for delivering said milk to said milk glass,said milk glass comprising means of deaerating said milk and means for delivering said milk to said milk tank,said means for delivering said milk to said milk glass and said means for delivering said milk to said milk tank comprising said pipe-line system,said pipe-line system comprising a line disposed obliquely downwardly,said line comprising said quantity meter,said quantity meter comprising a first electrically conducting element, a second electrically conducting element, a third electrically conducting element, a conductivity sensor and a microprocessor,said first and second and third electrically conducting elements operatively connected to said line in electrical contact with said milk in said line,said first electrically conducting element comprising a first conducting junction tube, said second electrically conducting element comprising a second conducting junction tube, and said third electrically conducting element comprising a third conducting junction tube,said first conducting junction tube separated from said second conducting junction tube via a non-conducting junction tube,said second conducting junction tube separated from said third conducting junction tube by a distance (l) via a further non-conducting junction tube,both said non-conducting junction tubes comprising an internal diameter which is substantially equal to an internal diameter of the three said conducting junction tubes,said second conducting junction tube disposed, in respect to the flow of said milk in said line, downstream from said first conducting junction tube,said third conducting junction tube disposed, in respect to the flow of said milk in said line, downstream from said second conducting junction tube,said first electrically conducting element, said second electrically conducting element and said third electrically conducting element operatively connected to said microprocessor,said conductivity sensor comprising a milk collecting reservoir, a fourth electrically conducting element and a fifth electrically conducting element,said milk collecting reservoir disposed in said line and containing a volume of said milk which is constant,said fourth electrically conducting element and said fifth electrically conducting element disposed in said milk collecting reservoir fixedly separated from each other and in operative contact with said milk in said milk collecting reservoir,said fourth electrically conducting element and said fifth electrically conducting element operatively connected to said microprocessor,said microprocessor comprisingmeans for deriving a span of time (.DELTA.t) between the moment a unit of said milk contacts said first and second electrically conducting element and the moment said unit of said milk thereafter contacts said third electrically conducting element,means of measuring the electric conductivity of said milk (G),means for calculating the flow rate of said milk (v),means for calculating the specific electrical resistance (R.sub.SW) of said milk in said milk collecting reservoir,means for storing the value of said distance (l),means for approximately calculating the quantity of milk (V) which has flowed through said line on the basis of the mathematical expression: EQU V=R.sub.SW .multidot.l.multidot.v.multidot.G.multidot.(.DELTA.t+l/v),said microprocessor operatively connected to said computer.