High Precision Liquid Dispenser

摘要

In one embodiment, a liquid dispenser includes a liquid reservoir, a measurement device providing at least one signal indicative of the amount of liquid remaining in the liquid reservoir, an electrically actuated valve coupled to a tube outlet exiting from a bottom of the liquid reservoir, and a processor. The processor is electrically connected to the measurement device and operatively coupled to and controlling operation of the valve. Further, the processor is configured to determine a valve open time for dispensing a requested amount of liquid. The valve open time depends upon a preliminary time based on the requested amount and at least one signal from the measurement device, and an adjustment to the preliminary time based on a difference between a requested amount and a measured amount determined by the measurement device for at least one previous dispense.

主权项

1. A liquid dispenser, comprising:
a liquid reservoir having an amount of liquid remaining therein; a measurement device providing at least one signal indicative of the amount of liquid remaining in the liquid reservoir; an electrically actuated valve coupled to a tube outlet exiting from a bottom of the liquid reservoir; and a processor that is (1) electrically connected to the measurement device and (2) operatively coupled to and controlling operation of the valve, wherein the processor is configured to determine a valve open time for dispensing a requested amount of liquid, the valve open time depending upon (1) a preliminary time based on the requested amount and the at least one signal from the measurement device, and (2) an adjustment to the preliminary time based on a difference between a requested amount and a measured amount determined by signals from the measurement device for at least one previous dispense.