Peristaltic pump with linear flow control

摘要

A peristaltic pump includes a conduit having a first end for receiving a fluid from a reservoir and a second end for delivering the fluid. A plurality of fingers are disposed at respective locations along a segment of the conduit and are configured to alternately compress and release the conduit at the locations. A cyclical pump mechanism is coupled to move the fingers between respective compressed and released positions in a spatio-temporal pattern so as to drive a predetermined quantity of the fluid through the segment of the conduit in each pump cycle. A motor is coupled to drive the pump mechanism. A controller is coupled to activate and deactivate the motor in alternation during each pump cycle with a duty cycle that varies within the pump cycle.

主权项

1. A peristaltic pump, comprising:
a conduit having a first end for receiving a fluid from a reservoir and a second end for delivering the fluid; a cyclical pump mechanism, to drive a predetermined quantity of the fluid through a segment of the conduit in each multiphase pump cycle, wherein said cyclical pump mechanism is characterized by a non-linear flow to phase function; a motor, which is coupled to drive the pump mechanism; and a controller, which is coupled to activate and deactivate the motor in alternation during each pump cycle with a duty cycle that varies within the pump cycle to substantially compensate for the non-linear flow to phase function.