MINI LEAD SCREW PUMP UTILIZING A MAGNETORESISTIVE SENSOR AND MANUFACTURING METHOD THEREOF

摘要

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.

主权项

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 rotating in a nut having a thread in a direction opposite to that of a thread of the lead screw, thereby driving the driving head to push a sleeve to move in a reservoir, wherein the mini lead screw pump further comprises:
at least one permanent magnet rotating co-axially with the lead screw; a magnetoresistive angle sensor capable of sensing a magnetic field generated by the at least one permanent magnet, the magnetoresistive angle sensor being located in a unidirectional and saturated area of the magnetic field generated by the at least one permanent magnet; and an MCU receiving a signal of the magnetoresistive angle sensor and using feedback to control the rotation direction and speed of the lead screw according to the signal of the magnetoresistive angle sensor.