Detecting unintentional motor motion and infusion device incorporating same
First Claim
1. A system comprising:
- 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 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
20 Claims
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1. A system comprising:
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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 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, 11, 12, 20)
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13. A method of detecting potential unintended motion of a motor, the method comprising:
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periodically enabling a sensing arrangement while the motor is idle, the sensing arrangement providing output indicative of a detected characteristic of the motor 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 the potential unintended motion based on outputs from the sensing arrangement when periodically enabling the sensing arrangement. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification