Systems and Methods for Detecting a Partition Position in an Infusion Pump
First Claim
1. A method of locating a position of a moveable partition for an infusion pump using at least one displacement sensor, comprising:
- a) selecting a potential range of positions for the moveable partition of the infusion pump;
b) segmenting the potential range into a set of potential positions; and
c) selecting a new position for the moveable partition to correspond with the potential position having a lowest calculated error measure in a calculated set of error measures, each error measure corresponding to one potential position in the potential range, each error measure based at least in part upon an actual displacement sensor signal from each of the at least one displacement sensor and the potential position corresponding with the calculated error measure.
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Accused Products
Abstract
An infusion pump (e.g., an electrokinetic infusion pump) includes an infusion pump module and an engine that can drive a moveable piston non-mechanically. In addition, the infusion pump module includes a position detector configured for sensing a dispensing state of the infusion pump module. Such information can be utilized in a control scheme to control fluid displacement within and out of the pump. Descriptions of different types of position detectors, such as magnetic sensors (e.g., an anisotropic magnetic resistive sensor), and their implementation in detecting infusion pump fluid displacement are described.
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Citations
33 Claims
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1. A method of locating a position of a moveable partition for an infusion pump using at least one displacement sensor, comprising:
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a) selecting a potential range of positions for the moveable partition of the infusion pump;
b) segmenting the potential range into a set of potential positions; and
c) selecting a new position for the moveable partition to correspond with the potential position having a lowest calculated error measure in a calculated set of error measures, each error measure corresponding to one potential position in the potential range, each error measure based at least in part upon an actual displacement sensor signal from each of the at least one displacement sensor and the potential position corresponding with the calculated error measure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A system for locating a position of a moveable partition in an infusion pump, comprising:
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a magnet coupled to the moveable partition;
at least one magnetic sensor coupled to a body of the infusion pump, each of the at least one magnetic sensor configured to emit a signal when subjected to a magnetic field of the magnet; and
a processor coupled to each of the at least one magnetic sensor, the processor configured to identify the position of the moveable partition at least in part by calculating a set of error measurements over a potential range of positions, the set of error measurements depending in part upon at least one actual sensor measurement and a set of potential positions within the potential range. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification