Patent ID: 9682188
Date: 2017-06-20
CPC Classifications: A61M,G16H

Claim:
1. An infusion device, comprising: a housing including a voided portion to receive a shaft coupled to a plunger of a reservoir, the shaft further including a binary code; a sensing arrangement disposed within the housing proximate to the voided portion, wherein the sensing arrangement includes an image sensor to detect the binary code and at least one light emitting element oriented towards the shaft to direct light on the binary code; a motor having a rotor coupled to the shaft, the shaft being displaced to deliver fluid from the reservoir in response to rotation of the rotor; a motor position sensor to measure an amount of rotation of the rotor; and a control module coupled to the image sensor and the motor position sensor to perform a function based in part on the binary code detected by the image sensor and based in part on the amount of rotation of the rotor measured by the motor position sensor, wherein the function performed by the control module includes obtaining a measured position of the shaft using the binary code detected by the image sensor and determining an expected position of the shaft using the amount of rotation of the rotor measured by the motor position sensor.