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Infusion control method and device with stepping motor

A technology of stepping motor and control method, which is applied in the field of medical equipment, can solve problems such as lack of high-precision mode and poor mechanical characteristics of the motor, and achieve the effect of reducing vibration and noise and improving the accuracy of infusion

Active Publication Date: 2019-07-05
广州富瑞价值医疗健康产业有限公司
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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 and device with stepping motor
  • Infusion control method and device with stepping motor
  • Infusion control method and device with stepping motor

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 stepper motor. The conversion process is converted into the corresponding target speed according to the mechanical characteristics of the infusion pump, such as The infusion rate xx ml / h, xx g / h and other infusion units can be converted into the target speed y rpm of the stepping motor according to the mechanical reduction ratio of different infusion tube types and infusion equipment. The infusion rate conversion module calculates the number of pulses per second required by the stepper motor to drive the IC when the stepper motor is running at the target speed according to the above target speed.

[0036] Acceleration and deceleration algorithm module, the acceleration and deceleration algorithm module, in accordance with the ...

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 manual interventions or other methods. During the operation of the motor, the stepper motor switches from a non-zero speed to the target speed.

[0114] The stepping motor is switched from the current speed to the target speed. Generally, the starting frequency of the stepping motor is involved. When a different starting frequency is selected, the vibration and noise characteristics of the stepping motor during the speed switching process will be different, such as a stepping motor. Switch from the current speed of 60rpm to the target speed of 600rpm, the starting frequency is A value, and the vibration and noise characteristics of the stepper motor are measured to be the best, then switch from the current speed of 60rpm to the target speed of 600rpm to select ...

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Abstract

The invention relates to an infusion control method with a stepping motor. The method comprises the following steps: the time, the step number and the smoothness required in a process of switching a current speed of the stepping motor to a target speed are assessed; then different acceleration and deceleration sections are divided according to an assessment result; and then acceleration and deceleration algorithms corresponding to the acceleration sections are selected to calculate out driving pulse frequencies corresponding to the acceleration sections. By dividing the different accelerationand deceleration sections, the balance of the acceleration and deceleration smoothness and the minimum acceleration and deceleration time / step number can be realized. For the same speed, the vibrationand noise of the motor can be effectively reduced by adopting an optimal subdivision ratio, so that the infusion precision is improved.

Description

Technical field [0001] The invention relates to the field of medical equipment, and in particular to an infusion control method and equipment with a stepping motor. Background technique [0002] Intravenous infusion (infusion, injection) is one of the most commonly used clinical treatment methods. In departments with high-precision requirements for infusion volume and flow, medical infusion equipment can automatically and intelligently control the flow and flow rate of infusion, so as to better protect patients and auxiliary medical workers for clinical infusion. At present, this kind 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 accurately control the infusion speed and the infusion volume, and can also alarm for abnormal conditions such as bubbles, empty liquid, and infusion t...

Claims

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Application Information

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IPC IPC(8): H02P8/04H02P8/24H02P8/18A61M5/142
CPCA61M5/142A61M2005/14208H02P8/04H02P8/18H02P8/24H02P2207/00
Inventor 马振宇
Owner 广州富瑞价值医疗健康产业有限公司
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