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Infusion control method with stepping motor and device thereof

A technology of a stepping motor and a control method, applied in the field of medical devices, can solve problems such as failure to achieve high-precision mode and poor mechanical characteristics of the motor, and achieve the effects of reducing vibration and noise and improving infusion accuracy

Active Publication Date: 2021-04-09
广州富瑞健康科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Under a wide infusion speed, the control of the motor based on the previous linear input method will inevitably lead to poor mechanical characteristics of the motor, which cannot reach the accuracy within ±2% required by the high-precision mode

Method used

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  • Infusion control method with stepping motor and device thereof
  • Infusion control method with stepping motor and device thereof
  • Infusion control method with stepping motor and device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] as attached figure 1 As shown, the device includes an infusion rate conversion module. The user inputs the required infusion speed on the infusion pump, and the infusion speed conversion module converts the infusion speed into the target speed of the stepping motor. The conversion process is converted into the corresponding target speed according to the mechanical characteristics of the infusion pump, such as Infusion units such as infusion speed xx ml / h, xx g / h can be converted into the target speed y rpm of the stepper motor according to different infusion tube types and mechanical reduction ratios of infusion equipment. The infusion speed conversion module calculates the number of pulses per second required by the stepper motor driver IC when the stepper motor operates at the target speed according to the above target speed.

[0036] Acceleration and deceleration algorithm module, the acceleration and deceleration algorithm module is based on the mechanical characte...

Embodiment 2

[0113] as attached Figure 8 As shown, during the infusion of the infusion pump, when the motor is started for the first time, the stepper motor starts from speed 0. However, in the actual operation process, there are often situations in which manual intervention or other methods occur during the operation of the motor, and the stepping motor switches from a non-zero speed to a target speed.

[0114] Switching the stepping motor from the current speed to the target speed generally involves the starting frequency of the stepping motor. If different starting frequencies are selected, the vibration characteristics and noise characteristics of the stepping motor will also be different during the speed switching process, such as the stepping motor Switch from the current speed of 60rpm to the target speed of 600rpm, the starting frequency is value A, and the vibration characteristics and noise characteristics of the stepper motor are measured to be optimal, then switch from the cur...

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PUM

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Abstract

An infusion control method with a stepping motor, the method comprising: evaluating the time, number of steps and smoothness required by the stepping motor in the process of switching from the current speed to the target speed, and then dividing different stepping motors according to the evaluation results. Deceleration section, and then select the acceleration and deceleration algorithm corresponding to each acceleration section, so as to obtain the drive pulse frequency corresponding to each acceleration section. By dividing different acceleration and deceleration sections, the balance between acceleration and deceleration smoothness and minimum acceleration and deceleration time / steps can be achieved. At the same speed, adopting the best subdivision ratio can effectively reduce the vibration and noise of the motor, thereby improving the infusion accuracy.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to an infusion control method with a stepping motor and equipment thereof. Background technique [0002] Intravenous infusion (infusion, injection) is one of the most commonly used clinical treatments. In departments with high-precision requirements for infusion volume and flow rate, medical infusion equipment can automatically and intelligently control the flow rate and flow rate of infusion, so as to better protect patients and assist medical workers in clinical infusion. At present, this type of equipment has been widely used in ICU, operating room, emergency department, gynecology, pediatrics and other occasions that have strict requirements for high-precision infusion. [0003] The infusion equipment is an intelligent instrument that can precisely control the infusion speed and infusion volume, and can also alarm and automatically cut off the infusion channel for abnormal condit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P8/04H02P8/24H02P8/18A61M5/142
CPCA61M5/142A61M2005/14208H02P8/04H02P8/18H02P8/24H02P2207/00
Inventor 马振宇
Owner 广州富瑞健康科技有限公司
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