Medication infusion system having optical motion sensor to detect drive mechanism malfunction
US5097122A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 16, 1990 |
| Grant date | Mar 17, 1992 |
| Priority date | — |
| Expiry date | Apr 16, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P13/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical motion sensor is provided for monitoring movement of a mechanical device, particularly such as an infusion pump of the type used for controlled delivery of medication to a patient. The motion sensor includes a disk member mounted upon a selected mechanical output component driven by the infusion pump, such that the disk member undergoes displacement during normal pump operation. The disk member defines a pattern of reflective and substantially nonreflective surface zones which are alternately illuminated by a light source during normal pump operation. A light detector responds to the level of reflection from the disk member to provide an output signal which varies according to disk member displacement. This output signal is connected to a controller for comparison with drive signals supplied to the infusion pump, to verify proper mechanical output operation of the pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.