초록 ▼

A loss-in-weight feeder for discharging a flowable substance from a reservoir through a controllable discharge member under regulated conditions is comprised of a scale for producing signals representative of the weight of material in the feeder, such weight signals being digitized by a digital conv

A loss-in-weight feeder for discharging a flowable substance from a reservoir through a controllable discharge member under regulated conditions is comprised of a scale for producing signals representative of the weight of material in the feeder, such weight signals being digitized by a digital converter, the output of which accumulated and fed into a computer and storage device for establishing the actual rate of the feeder, comparing the actual feed rate with a desired feed rate input into the storage device, and developing a correction signal based on any deviation between the actual and desired feed rates and applied to the feeder to adjust the actual feed rate through the discharge member.

대표청구항 ▼

A loss-in-weight feeder for discharging a flowable substance from a reservoir through a controllable discharge member under regulated conditions, comprising: scale means for developing a weight signal representative of the weight of at least the material being discharged from said reservoir; digital

A loss-in-weight feeder for discharging a flowable substance from a reservoir through a controllable discharge member under regulated conditions, comprising: scale means for developing a weight signal representative of the weight of at least the material being discharged from said reservoir; digital converting means in operative communication with said scale means for sampling said weight signal and developing digital weight signals representative thereof at a predetermined sampling rate; storage means in operative communication with said digital converting means for accumulating said digital weight signals; computing means in operative communication with said digital converting means for developing arithmetic average weight signals from said digital weight signals representative of the actual feed rate from said reservoir; input means, operatively associated with said storage means, for entering a signal representative of the desired feed rate from said reservoir into said storage means; said computing means also being used for developing a correction signal based on a proportioned deviation signal determined as a time-weighted variable which is a function of any deviation between the actual feed rate and the desired feed rate; and feedback means communicating with said computing means for applying said correction signal to said feeder to adjust the actual feed rate through said discharge member.