Method and apparatus for weighing batches of liquid and other pourable substances
AssigneeIFE Gesellschaft mbH
InventorKonrad Kuschel
Life of this patent
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Abstract
During the weighing operation, the change in weight indication is determined according to time value of elapsed time and this value is multiplied with the reduced shutoff time, the negative value thereof being added to the product of the square of the time change and a constant. The intended weight for the batch is added to the algebraic sum of the two values, and the further flow of substance into the receptacle wherein it is being weighed is terminated as soon as the weight indication has reached a summation value.
Claims14
A method of controlling the pouring of pourable material into a receptacle comprising, in combination, the steps of using a weigher to measure the downwardly directed force exerted by pourable material contained within and being poured into the receptacle during the actual pouring of such material into the receptacle and generating a corresponding weight-indication signal W;
- generating a desired-weight signal W.sub.S indicative of the weight of the total amount of pourable material to be poured into the receptacle;
- applying the signals W and W.sub.S to calculating means operative for generating during the course of the pouring an output signal W.sub.A having a value continually equal to W.sub.S - t.sub.N (dW/dt) + C(dW/dt).sup.2, t.sub.N and C being preselected constants;
- and during the course of the pouring applying the signals W and W.sub.A to the input of means operative for automatically terminating the further pouring of such material into the receptacle when the signals W and W.sub.A become equal in value.
In an apparatus for controlling the pouring of pourable material into a receptacle, in combination, weighing means operative for measuring the downwardly directed force exerted by pourable material contained within and being poured into the receptacle during the actual pouring of such material into the receptacle and generating a corresponding weight-indication signal W;
- means for generating a desired-weight signal W.sub.S indicative of the weight of the total amount of pourable material to be poured into the receptacle;
- means for generating an output signal W.sub.A having a value equal to W.sub.S - t.sub.N (dW/dt) + C(dW/dt).sup.2, t.sub.N and C being preselected constants;
- and means receiving the signals W and W.sub.A and operative for automatically terminating the further pouring of such material into the receptacle when the signals W and W.sub.A become equal in value.
Dependencies are inferred from the claim text.