Mini lead screw pump utilizing a magnetoresistive sensor and manufacturing method thereof
First Claim
1. A mini lead screw pump mounted within a pump box, the mini lead screw pump comprising a motor, the motor driving a lead screw and a driving head connected to the lead screw, the lead screw configured to rotate in a nut and drive the driving head to move a sleeve in a reservoir, wherein the mini lead screw pump further comprises:
- at least one permanent magnet configured to rotate co-axially with the lead screw;
a magnetoresistive angle sensor configured to sense a magnetic field generated by the at least one permanent magnet; and
a micro control unit (MCU) configured to receive a signal of the magnetoresistive angle sensor and control a rotation direction and speed of the lead screw according to the signal of the magnetoresistive angle sensor.
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Accused Products
Abstract
A mini lead screw pump monitors the rotation of a lead screw by using a magnetoresistive sensor and an MCU, and uses feedback to control the rotation direction and speed of the lead screw through a motor controller so as to control the speed of infusion to a patient. Furthermore, this mini lead screw pump can control the infusion speed of insulin according to the patient'"'"'s blood sugar concentration monitored by CGM. This mini lead screw pump has several advantages, comprising high sensitivity, high reliability, low power consumption, low cost, and ease of use.
21 Citations
20 Claims
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1. A mini lead screw pump mounted within a pump box, the mini lead screw pump comprising a motor, the motor driving a lead screw and a driving head connected to the lead screw, the lead screw configured to rotate in a nut and drive the driving head to move a sleeve in a reservoir, wherein the mini lead screw pump further comprises:
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at least one permanent magnet configured to rotate co-axially with the lead screw; a magnetoresistive angle sensor configured to sense a magnetic field generated by the at least one permanent magnet; and a micro control unit (MCU) configured to receive a signal of the magnetoresistive angle sensor and control a rotation direction and speed of the lead screw according to the signal of the magnetoresistive angle sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A mini lead screw pump, comprising:
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a reservoir; a sleeve configured to move in the reservoir; a lead screw; a driving head connected to the lead screw; a motor configured to rotate the lead screw to drive the driving head to move the sleeve in the reservoir; at least one permanent magnet configured to rotate co-axially with the lead screw; a magnetoresistive angle sensor configured to sense a magnetic field generated by the at least one permanent magnet, wherein the magnetoresistive angle sensor includes an AMR, a GMR or a TMR sensor, wherein a central axis of the permanent magnet and a central axis of the lead screw pass through a center of the magnetoresistive angle sensor; and a micro control unit (MCU) configured to receive a signal of the magnetoresistive angle sensor and use a motor controller to control a rotation direction and speed of the lead screw based on the signal of the magnetoresistive angle sensor. - View Dependent Claims (20)
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Specification