FLUID DISPENSER HAVING INFRARED USER SENSOR

摘要

A dispensing system is disclosed which utilizes a controller in conjunction with a photodetector in order to provide automatic dispensing to a user when an object enters a target area. A controller is programmed to pulse a light source tha t is mounted proximate the photodetector. The controller constantly monitors the voltage at the receiving signal of the photodetector, and evaluates the difference i n voltage from the light pulsed on and off. The controller sums the differences, and constantly updates the differences over a designated period to create an average difference value. The average difference value is summed with a target offset value and compar ed to a momentary voltage difference. When the momentary difference exceeds the sum of the target offset value and average difference, the controller sends a signa l to a dispense mechanism which dispenses a fluid or other product on the object.