WO2019085155A1 - 一种高精度蠕动泵流速控制系统 - Google Patents

一种高精度蠕动泵流速控制系统 Download PDF

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Publication number
WO2019085155A1
WO2019085155A1 PCT/CN2017/115385 CN2017115385W WO2019085155A1 WO 2019085155 A1 WO2019085155 A1 WO 2019085155A1 CN 2017115385 W CN2017115385 W CN 2017115385W WO 2019085155 A1 WO2019085155 A1 WO 2019085155A1
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Prior art keywords
flow rate
peristaltic pump
pump
blood
control system
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PCT/CN2017/115385
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English (en)
French (fr)
Inventor
彭春
王朝富
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四川南格尔生物科技有限公司
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Priority to EP17931020.6A priority Critical patent/EP3705722A4/en
Priority to AU2017437743A priority patent/AU2017437743A1/en
Priority to RU2020117222A priority patent/RU2759193C1/ru
Publication of WO2019085155A1 publication Critical patent/WO2019085155A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F04B49/065—Control using electricity and making use of computers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/36—Other treatment of blood in a by-pass of the natural circulatory system, e.g. temperature adaptation, irradiation ; Extra-corporeal blood circuits
    • A61M1/3672—Means preventing coagulation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
    • A61M60/20—Type thereof
    • A61M60/247—Positive displacement blood pumps
    • A61M60/253—Positive displacement blood pumps including a displacement member directly acting on the blood
    • A61M60/268—Positive displacement blood pumps including a displacement member directly acting on the blood the displacement member being flexible, e.g. membranes, diaphragms or bladders
    • A61M60/279—Peristaltic pumps, e.g. roller pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/10—Other safety measures
    • F04B49/103—Responsive to speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/10—Other safety measures
    • F04B49/106—Responsive to pumped volume
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/20—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by changing the driving speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2201/00—Pump parameters
    • F04B2201/12—Parameters of driving or driven means
    • F04B2201/1201—Rotational speed of the axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00—Fluid parameters
    • F04B2205/09—Flow through the pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2207/00—External parameters
    • F04B2207/70—Warnings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B51/00—Testing machines, pumps, or pumping installations

Definitions

  • the utility model relates to the field of plasma collection, in particular to a peristaltic pump flow rate control system.
  • the current anti-coagulation mechanism of the blood maintenance solution is to use calcium citrate which is combined with calcium ions in the blood to form a soluble and ionizable calcium citrate to make the free state. Calcium is converted into a bound state of calcium and loses its physiological function of coagulation, and the blood remains in a non-coagulated state.
  • the proportion is proportional (usually blood: anticoagulant ratio is 16:1, the ratio is adjusted according to the individual red blood cell product HCT value), and then mixed into the anticoagulant, and then enters the centrifugal separation process.
  • the red blood cells, the white film layer and the like are returned to the donor together with the previously mixed anticoagulant.
  • excess blood in the maintenance fluid is returned to the patient, excess citrate may bind to calcium ions in the patient's blood, causing the patient's blood calcium concentration to decrease, posing a risk of hypocalcemia.
  • the apheresis plasma equipment at home and abroad is driven by a motor-driven peristaltic pump technology.
  • the rotational speed of the peristaltic pump motor is controlled by a servo motor encoder or a stepper motor + Hall sensor.
  • the default peristaltic pump draws a uniform flow rate per revolution (eg 1mL/rev), and achieves anti-coagulant-to-blood mixing ratio control by the ratio of the speed of the peristaltic pump (eg, the ratio of the blood pump to the anticoagulant pump) Set to 16:1 to achieve a 16:1 ratio of blood to anticoagulant).
  • the motor control technology is relatively mature. There are a series of technical means that can be used to achieve precise control of the motor speed.
  • the precondition is that the flow per motor revolution is constant, but in the actual application process.
  • the precondition is usually affected by the wear of the peristaltic pump roller, the individual differences of the pipeline consumables, the pipeline pressure, etc., and the flow rate extracted per revolution of the peristaltic pump has a deviation of about 20%, which leads to the actual anticoagulant. There is a deviation of about 20% in the amount used.
  • the present invention provides a high-precision peristaltic pump flow rate control system.
  • an embodiment of the present invention includes a motor, a peristaltic pump, a rotational speed feedback component, a flow rate feedback component, and a controller, wherein the motor is connected to a peristaltic pump, and the peristaltic pump corresponds to a connection speed.
  • the feedback component and the flow rate feedback component, the rotational speed feedback component and the flow velocity feedback component are correspondingly connected to the controller, and the controller is correspondingly connected to the motor, wherein the flow velocity feedback component comprises a flow rate detecting device and a judging module.
  • the flow rate detecting device is a flow sensor.
  • FIG. 1 is a block diagram showing the structure of a peristaltic pump flow rate control system according to an embodiment of the present invention.
  • the utility model provides a high-precision peristaltic pump flow rate control system with a flow rate feedback mechanism.
  • the utility model relates to a high-precision peristaltic pump flow rate control system, which comprises a motor, a peristaltic pump, a rotational speed feedback component, a flow velocity feedback component and a controller.
  • the motor is connected with a peristaltic pump
  • the peristaltic pump is connected with a rotational speed feedback component and a flow rate feedback.
  • the component, the speed feedback component and the flow rate feedback component are correspondingly connected to the controller, and the controller is correspondingly connected to the motor, wherein the flow rate feedback component comprises a flow rate detecting device and a determining module.
  • the peristaltic pump of the utility model comprises an anticoagulant pump and a blood pump, and the anticoagulant pump is installed in the anticoagulant pipeline for driving the anticoagulant into the pipeline, and the blood pump is installed in the blood pipeline for Drive blood into the tubing.
  • the coagulant pump and blood pump are common devices in the plasma collection process.
  • the flow rate detecting device of the utility model detects the anticoagulant pump and the blood pump flow rate at the set rotation speed and transmits the detected anticoagulant pump and the blood pump flow rate to the judging module, and the judging module determines that the anticoagulant pump or the blood pump flow rate is less than the When the preset value is under the speed, it indicates that the roller has low pressing force and high speed feedback, which causes the flow rate of the coagulant pump or the blood pump to be too small.
  • the judgment module sends the judgment result to the control device, and the control device increases the anticoagulant pump by control.
  • the judgment module determines that the anticoagulant pump or the blood pump flow rate is greater than the preset value at the speed, indicating that the roller has high crushing force and low speed feedback.
  • the factor causes the flow rate of the coagulant pump or the blood pump to be too large, and the judging module sends the determination result to the control device, and the control device reduces the flow rate to a preset value by controlling a correction measure for reducing the anticoagulant pump or the blood pump rotation speed.
  • the flow rate detecting device of the utility model can be a flow sensor, and the flow sensor is respectively installed in the anticoagulant pump line and the blood pump line, and respectively monitors the flow rate of the coagulant pump and the blood pump.
  • the accuracy of the flow sensor flow monitoring directly affects the control effect of the anticoagulant dosage.
  • the flow rate sensor is provided with a self-calibration module.
  • the flow rate sensor is a small-caliber high-resolution ultrasonic flow rate sensor, the flow sensor has an inner diameter range of 3-5 mm, and an outer diameter range of 6-7 mm. As an embodiment, the inner diameter is 4 mm and the outer diameter is 6.4 mm. It is a flow rate sensor of 1.25 ml/min.
  • the flow rate detecting device of the present invention may further comprise a counting device and a capacity measuring device, wherein the counting device is used for counting the running speed of the anticoagulant pump and the blood pump in the set time, and the capacity measuring device is used for measuring the anti-coagulation time in the set time.
  • an air detector is arranged in the anticoagulant pump line and the blood pump line, and the counting device counts the air detector in the anticoagulant pump line and the blood pump line.
  • the number of operating coils of the anticoagulant pump in the interval when the corresponding pipeline has no air is detected respectively, and the anticoagulant capacity of the anticoagulant pump is calculated from the size of the anticoagulant pipeline and the length of the pipeline between the two air detectors. .
  • the counting device counts the air detector in the blood pump pipeline to detect the number of running cycles of the blood pump in the blood pipeline without the air from the plasma mass reaching the set value interval, and the volume in the centrifuge cup plus air detection
  • the blood volume in the blood line between the plasma bag is the blood volume through the blood pump, and the blood volume in the blood line between the air detector and the plasma bag is between the blood tube size and the air detector from the plasma bag.
  • the length of the pipe is determined.
  • the flow rate detecting device of the present invention may also include a counting device and a mass measuring device.
  • the counting device is used for counting the running time of the anticoagulant pump and the blood pump in the set time period
  • the mass measuring device is used for measuring the amount of the anticoagulant in the anticoagulant bag within the set time period and measuring the set time duration of the blood through the centrifuge The quality of the plasma obtained after centrifugation.
  • the flow rate feedback component of the utility model is provided with an alarm device, and the alarm device corresponds to the connection judging module, and the flow rate feedback component can correct the range of the anti-coagulant pump and the blood pump flow rate within a preset flow rate value of ⁇ 20%, when the anticoagulant pump or When the blood pump flow rate exceeds the correctable range, it is judged that the pump control pipeline is abnormal, and the alarm device issues an alarm to notify the equipment user to check the pipeline blockage or the pump roller failure and other abnormalities in time, thereby improving the reliability and maintainability of the apheresis plasma equipment. .
  • the flow rate feedback component of the utility model is externally clamped and installed in the anticoagulant pipeline and the blood pipeline, does not pollute the collected blood, and is simple to install, and can be directly applied to existing consumables.
  • the advantages of the utility model are numerous. Different aspects, embodiments or implementations may yield one or more of the following advantages.
  • An advantage of the utility model is that the flow rate feedback component is arranged to control the flow rate of the anticoagulant pump and the blood pump flow rate in the vicinity of the set value, thereby realizing precise control of the amount of plasma anticoagulant and improving the quality of apheresis plasma. , reducing the health impact on the donor.
  • Another advantage of the utility model is that the flow rate feedback component has a modular design, which is convenient for system integration with the current single plasma collection device, and has low cost and high versatility.

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Abstract

一种高精度蠕动泵流速控制系统，包括电机、蠕动泵、转速反馈组件、流速反馈组件和控制器，所述电机对应连接蠕动泵，所述蠕动泵对应连接转速反馈组件和流速反馈组件，所述转速反馈组件和流速反馈组件对应连接控制器，所述控制器对应连接电机，其中流速反馈组件包括流速检测装置和判断模块。通过设置流速反馈组件将抗凝泵流速与血泵流速控制在设定值附近，实现了对单采血浆抗凝剂用量的精确控制，提高了单采血浆的品质，降低了对献浆者的健康影响。

Description

一种高精度蠕动泵流速控制系统 技术领域
本实用新型涉及血浆采集领域，特别是一种蠕动泵流速控制系统。
背景技术
为使血液在离开人体后得以长时间保存，目前通用的血液保养液抗凝机理是利用枸橼酸盐与血液中的钙离子结合成可溶而不可电离的枸橼酸钙，使游离状态的钙转变成结合状态的钙而失去其凝血的生理功能，血液得以保持不凝固状态。
在单采血浆过程中，在血液流出人体后按比例(通常血液:抗凝剂比例为16:1，根据个体红细胞积HCT值对该比例有微调)混入抗凝剂后，进入离心分离处理过程，经离心分离出血浆后，将红细胞、白膜层等成份连同先前混入的抗凝剂一起再回输给献浆者。保养液过剩的血液回输给病人后，过剩的枸橼酸盐可能与患者血液中的钙离子结合，使患者血液钙浓度降低，有引起低血钙的危险。如果将这种血输给儿童或将多袋这样的血输给同一个病人，特别是患者本身血液钙离子浓度较低情况，可能使其血清钙浓度更低，以至引起临床缺钙表现。而且，抗凝剂过剩的血液输入患者体内后，会使正常的凝血时间延缓而影响患者健康。
目前国内外的单采血浆设备对抗凝剂与血液的混合均采用电机驱动蠕动泵技术，蠕动泵电机的转速通过伺服电机编码器或步进电机+霍尔传感器实现速度反馈控制。默认蠕动泵每转一圈抽取的流量为一致的(如：1mL/转)，通过蠕动泵的转速比例实现对抗凝剂与血液混合比例的控制(如将血泵与抗凝剂泵转速比设置为16：1即实现血液与抗凝剂比例16：1混合)。
目前电机控制技术相对成熟，有一系列的技术手段可用于实现电机转速的精确控制，但在单采血浆这个实际应用中场景中，前提条件是电机每转一圈的流量恒定，但在实际应用过程中，该前提条件通常受蠕动泵滚轮磨损、管路耗材本身个体差异、管路压力等因素的影响，蠕动泵每转一圈提取的流量存在20％左右的偏差，即导致抗凝剂的实际用量存在20％左右的偏差。
实用新型内容
基于上述技术问题，本实用新型提供一种高精度蠕动泵流速控制系统。
本实用新型采用的技术方案如下：
作为一种高精度蠕动泵流速控制系统，本实用新型的一个实施例包括电机、蠕动泵、转速反馈组件、流速反馈组件和控制器，所述电机对应连接蠕动泵，所述蠕动泵对应连接转速反馈组件和流速反馈组件，所述转速反馈组件和流速反馈组件对应连接控制器，所述控制器对应连接电机，其中流速反馈组件包括流速检测装置和判断模块。
进一步地，所述流速检测装置为流量传感器。
本实用新型的其他方面和优点根据下面结合附图的详细的描述而变得明显，所述附图通过示例说明本实用新型的原理。
附图说明
图1是本实用新型实施例提供的蠕动泵流速控制系统结构框图。
具体实施方式
下面结合附图，对本实用新型作详细的说明。
为了使本实用新型的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本实用新型进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本实用新型，并不用于限定本实用新型。
本实用新型提供一种具有流速反馈机制的高精度蠕动泵流速控制系统。
本实用新型一种高精度蠕动泵流速控制系统，包括电机、蠕动泵、转速反馈组件、流速反馈组件和控制器，所述电机对应连接蠕动泵，所述蠕动泵对应连接转速反馈组件和流速反馈组件，所述转速反馈组件和流速反馈组件对应连接控制器，所述控制器对应连接电机，其中流速反馈组件包括流速检测装置和判断模块。
本实用新型蠕动泵包括抗凝剂泵和血泵，抗凝剂泵安装于抗凝剂管路中，用于将抗凝剂驱动至管路中，血泵安装于血液管路中，用于将血液驱动至管路中。凝剂泵和血泵为血浆采集过程中的常用器件。
本实用新型流速检测装置检测设定转速下抗凝剂泵和血泵流速并将检测到的抗凝剂泵和血泵流速传递给判断模块，判断模块判定抗凝剂泵或血泵流速小于该转速下预置值时，说明滚轮挤压力低、速度反馈偏高等因素导致了凝剂泵或血泵流速偏小，判断模块将判定结果发送给控制装置，控制装置通过控制增加抗凝剂泵或血泵转速的修正措施来提高流速至预设值；同理，判断模块判定抗凝剂泵或血泵流速大于该转速下预置值时，说明滚轮挤压力高、速度反馈偏低等因素导致了凝剂泵或血泵流速偏大，判断模块将判定结果发送给控制装置，控制装置通过控制减小抗凝剂泵或血泵转速的修正措施来降低流速至预设值。
本实用新型流速检测装置可以是流量传感器，流量传感器分别安装于抗凝剂泵管路和血泵管路中，分别对抗凝剂泵和血泵进行流速监测。流量传感器流量监测的准确性直接影响抗凝剂用量的控制效果，为了确保流速监测的有效性，流速传感器设置有自校准模块。优化地，流速传感器为小口径高分辨率超声流速传感器，流速传感器内径范围为3-5mm，外径范围为6-7mm，作为实施例，可采用内经为4mm，外经为6.4mm，分辨率为1.25ml/min的流速传感器。
本实用新型流速检测装置也可包括计数装置和容量测量装置，计数装置用于统计设定时间内抗凝剂泵和血泵的运转圈速，容量测量装置用于测量该设定时间内通过抗凝剂泵的抗凝剂容量和通过血泵的血液容量。测量通过抗凝剂泵的抗凝剂容量时，抗凝剂泵管路和血泵管路中设置有空气探测器，计数装置统计抗凝剂泵管路与血泵管路中的空气探测器分别检测到对应管路无空气时的间隔内抗凝剂泵运转圈数，通过抗凝剂泵的抗凝剂容量由抗凝剂管路尺寸和两空气探测器之间的管路长度计算得到。测量通过血泵的血液容量时，计数装置统计血泵管路中空气探测器检测到血液管路无空气距血浆质量达到设定值间隔内血泵的运转圈数，离心杯中容量加空气探测器距血浆袋之间血液管路中的血液容量为通过血泵的血液容量，空气探测器距血浆袋之间血液管路中的血液容量由血液管路尺寸和空气探测器距血浆袋之间管路长度决定。
本实用新型流速检测装置也可包括计数装置和质量测量装置。计数装置用于统计设定时长内抗凝剂泵和血泵的运转圈数，质量测量装置用于测定设定时长内抗凝剂袋中抗凝剂用量和测定设定时长内血液经离心机离心后得到的血浆质量。
本实用新型流速反馈组件设置有报警装置，报警装置对应连接判断模块，流速反馈组件对抗凝剂泵和血泵流速的可修正范围为预设流速值±20％范围，当 抗凝剂泵或血泵流速超过可修正范围时，判断泵控管路异常，报警装置发出警报，通知设备使用人员及时检查管路阻塞或泵滚轮失效等异常，提高了单采血浆设备的可靠性和可维护性。
本实用新型流速反馈组件外夹式安装于抗凝剂管路和血液管路中，不对采集血液带去任何污染，安装简单，可直接适用于既有耗材。
本实用新型的不同方面、实施例、实施方式或特征能够单独使用或任意组合使用。
本实用新型的优点众多。不同的方面、实施例或实施方式可以产生以下优点中的一个或多个优点。本实用新型的一个优点是：通过设置流速反馈组件将抗凝泵流速与血泵流速控制在设定值附近，实现了对单采血浆抗凝剂用量的精确控制，提高了单采血浆的品质，降低了对献浆者的健康影响。本实用新型的另一个优点是：流速反馈组件模块化设计，便于与现在单采血浆设备进行系统整合，成本低、通用性强。
以上所述仅为本实用新型的较佳实施例而已，并不用以限制本实用新型，凡在本实用新型的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本实用新型的保护范围之内。

Claims (6)

  1. 一种高精度蠕动泵流速控制系统，其特征在于，包括电机、蠕动泵、转速反馈组件、流速反馈组件和控制器，所述电机对应连接蠕动泵，所述蠕动泵对应连接转速反馈组件和流速反馈组件，所述转速反馈组件和流速反馈组件对应连接控制器，所述控制器对应连接电机，其中流速反馈组件包括流速检测装置和判断模块。
  2. 根据权利要求1所述的一种高精度蠕动泵流速控制系统，其特征在于，所述流速检测装置为流量传感器。
  3. 根据权利要求1所述的一种高精度蠕动泵流速控制系统，其特征在于，所述流速反馈组件设置有报警装置。
  4. 根据权利要求1所述的一种高精度蠕动泵流速控制系统，其特征在于，所述流速反馈组件外夹式安装于抗凝剂管路和血液管路中。
  5. 根据权利要求2所述的一种高精度蠕动泵流速控制系统，其特征在于，所述流速传感器设置有自校准模块。
  6. 根据权利要求2所述的一种高精度蠕动泵流速控制系统，其特征在于，所述流速传感器为小口径超声流速传感器，流速传感器内径范围为3-5mm，外径范围为6-7mm。
PCT/CN2017/115385 2017-10-31 2017-12-11 一种高精度蠕动泵流速控制系统 WO2019085155A1 (zh)

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