Detecting unintentional motor motion and infusion device incorporating same
First Claim
1. An infusion device comprising:
- a motor including a rotor, the rotor having a magnet coupled thereto, wherein rotation of the rotor is configured to provide translational displacement of a plunger in a fluid reservoir;
a sensing arrangement coupled to the motor, the sensing arrangement comprising one or more sensors to provide output indicative of a detected magnetic field of the magnet when the sensing arrangement is enabled; and
a module coupled to the sensing arrangement to;
periodically enable the sensing arrangement to consume current while the motor is idle and disable the sensing arrangement after each enabling; and
detect potential unintended motion of the motor based on the output from the sensing arrangement while periodically enabling the sensing arrangement.
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Accused Products
Abstract
Apparatus are provided for infusion devices and related systems and operating methods. An exemplary system includes a motor, a sensing arrangement coupled to the motor to provide output indicative of a detected characteristic of the motor when the sensing arrangement is enabled, and a module coupled to the sensing arrangement to periodically enable the sensing arrangement while the motor is idle and detect potential unintended motion of the motor based on the output from the sensing arrangement while periodically enabling the sensing arrangement. In some embodiments, the motor includes a rotor configured such that its rotation provides translational displacement of a plunger in a fluid reservoir, and the sensing arrangement includes one or more sensors configured to provide output indicative of a detected magnetic field of the rotor magnet.
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Citations
19 Claims
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1. An infusion device comprising:
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a motor including a rotor, the rotor having a magnet coupled thereto, wherein rotation of the rotor is configured to provide translational displacement of a plunger in a fluid reservoir; a sensing arrangement coupled to the motor, the sensing arrangement comprising one or more sensors to provide output indicative of a detected magnetic field of the magnet when the sensing arrangement is enabled; and a module coupled to the sensing arrangement to; periodically enable the sensing arrangement to consume current while the motor is idle and disable the sensing arrangement after each enabling; and detect potential unintended motion of the motor based on the output from the sensing arrangement while periodically enabling the sensing arrangement. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of detecting potential unintended motion of a motor of an infusion device including the motor configured to provide translational displacement of a plunger in a fluid reservoir, the motor including a rotor, the method comprising:
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periodically enabling a sensing arrangement while the motor is idle, the sensing arrangement including one or more sensors providing output indicative of a detected characteristic of the rotor when the sensing arrangement is enabled, wherein periodically enabling the sensing arrangement comprises; enabling the sensing arrangement to consume current on a periodic basis; and disabling the sensing arrangement after each enabling; and detecting potential unintended rotation of the rotor while the motor is idle based on outputs from the one or more sensors when periodically enabling the sensing arrangement. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification