CN111643776A - Intelligent infusion control instrument and control method thereof - Google Patents

Intelligent infusion control instrument and control method thereof Download PDF

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Publication number
CN111643776A
CN111643776A CN202010637620.1A CN202010637620A CN111643776A CN 111643776 A CN111643776 A CN 111643776A CN 202010637620 A CN202010637620 A CN 202010637620A CN 111643776 A CN111643776 A CN 111643776A
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China
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groove
infusion
shell
temperature
infusion tube
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CN202010637620.1A
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Chinese (zh)
Inventor
金冠英
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Tongji Medical College of Huazhong University of Science and Technology
Union Hospital Tongji Medical College Huazhong University of Science and Technology
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Union Hospital Tongji Medical College Huazhong University of Science and Technology
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Priority to CN202010637620.1A priority Critical patent/CN111643776A/en
Publication of CN111643776A publication Critical patent/CN111643776A/en
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    • 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
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
    • A61M5/16804—Flow controllers
    • A61M5/16813—Flow controllers by controlling the degree of opening of the flow line
    • 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
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
    • A61M5/16831—Monitoring, detecting, signalling or eliminating infusion flow anomalies
    • A61M5/1684—Monitoring, detecting, signalling or eliminating infusion flow anomalies by detecting the amount of infusate remaining, e.g. signalling end of infusion
    • 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
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
    • A61M5/16877—Adjusting flow; Devices for setting a flow rate
    • 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
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
    • A61M5/16886—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body for measuring fluid flow rate, i.e. flowmeters
    • 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
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/44—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for cooling or heating the devices or media
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B13/00—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
    • G05B13/02—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
    • G05B13/04—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
    • G05B13/042—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators in which a parameter or coefficient is automatically adjusted to optimise the performance
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/18—General characteristics of the apparatus with alarm
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3306—Optical measuring means
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3327—Measuring
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3331—Pressure; Flow
    • A61M2205/3334—Measuring or controlling the flow rate
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3368—Temperature
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3379—Masses, volumes, levels of fluids in reservoirs, flow rates
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/36—General characteristics of the apparatus related to heating or cooling
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/50—General characteristics of the apparatus with microprocessors or 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
    • A61M2230/00—Measuring parameters of the user
    • A61M2230/04—Heartbeat characteristics, e.g. ECG, blood pressure modulation
    • A61M2230/06—Heartbeat rate only

Abstract

The invention provides an intelligent drip controller, comprising: a hollow housing having an opening formed at one side thereof; the adjusting block is vertically and fixedly arranged on the upper part of the inner wall of the shell; the through groove is vertically arranged on the adjusting block in a penetrating way and is used for accommodating the infusion tube; the first through hole is rectangular, is arranged on the side surface of the adjusting block and is communicated with the through groove; the groove is arc-shaped and is vertically arranged on the side surface of the through groove opposite to the first through hole; the pair of baffles are symmetrically arranged at two sides of the groove; the supporting block is vertically and fixedly arranged in the middle of the inner wall of the shell; the supporting groove is vertically arranged on the top surface of the supporting block; the pair of supporting plates are symmetrically arranged on the supporting grooves, arc-shaped grooves are formed in opposite side surfaces of the supporting plates, and the supporting plates are in corresponding positions to form a hollow cylindrical structure; the second through hole is rectangular and is arranged on the bottom surface of the supporting block; and the power mechanism is vertically arranged on the inner wall of the shell, and the output end of the power mechanism corresponds to the first through hole. The invention also provides a control method of the intelligent drip controller.

Description

Intelligent infusion control instrument and control method thereof
Technical Field
The invention relates to the technical field of infusion devices, in particular to an intelligent infusion control instrument and a control method thereof.
Background
In medical care work, infusion is basically conventional operation, infusion tubes are basically manual operation infusion speed, and special personnel are needed to monitor the infusion state. The nursing staff generally adjusts the number of the watches, and the time and the labor are very time-consuming.
The Chinese patent 201810615939.7 discloses an adjustable multi-medium infusion dripping speed regulator, which comprises a flow regulator arranged at the center of the interior of a flow regulating bin, a plurality of capillary tubes are vertically arranged between the outer wall of an elastic cushion layer and the inner wall of the flow regulating bin, a rotary disc in the flow regulating bin rotates by rotating a knob, a pressure rod is further rotated to different gear clamping grooves, so that a pressing sheet presses the elastic cushion layer to force the elastic cushion layer to deform, the elastic cushion layer extrudes outwards to press the capillary tubes, and the opening number of capillary infusion tubes is controlled, so that the flow speed is regulated.
Chinese utility model 201820219221.1 discloses a surgical liquid dripping speed regulator, which is characterized in that bearing seats are fixedly connected at the centers of two sides of a liquid storage tank, a movable shaft is transversely arranged at one side corresponding to the two bearing seats, and a baffle is arranged on the surface of the movable shaft and in the inner cavity of the liquid storage tank. When the dropping speed of the liquid needs to be adjusted, the pull handle is pulled to take out the positioning rod, then the turntable is rotated, the movable shaft is driven to rotate through the rotation of the turntable, and the baffle is driven to rotate through the rotation of the movable shaft, so that the dropping speed is adjusted.
However, the above device still needs to be adjusted manually, and the dropping speed still needs to be confirmed by counting the number after adjustment, and the device still takes time and labor until the required dropping speed is adjusted, and does not solve the essential problem.
Disclosure of Invention
The invention aims to design and develop an intelligent drip controller which can automatically adjust the dripping speed of liquid medicine in a drip cup so as to adjust the transfusion speed.
The invention also aims to design and develop a control method of the intelligent drip controller, which can determine the dripping speed of the liquid medicine in the drip cup based on a fuzzy control method, further control the action of a power mechanism and realize the automatic adjustment of the transfusion speed.
The invention can also control the temperature of the temperature adjusting column, control the infusion temperature and improve the comfort of infusion.
The technical scheme provided by the invention is as follows:
an intelligent drip controller comprising:
the shell is of a hollow structure, and an opening is formed in one side of the shell;
the adjusting block is vertically and fixedly arranged on the upper part of the inner wall of the shell opposite to the opening of the shell;
the through groove is vertically arranged on the adjusting block in a penetrating way, and the outer side surface of the through groove is provided with an opening for accommodating an infusion tube;
the first through hole is rectangular, is arranged on the side face of the adjusting block which is axially parallel to the through groove, and is communicated with the through groove;
the groove is arc-shaped, is vertically arranged on the side surface of the through groove opposite to the first through hole and corresponds to the first through hole;
the pair of baffles are symmetrically arranged at two sides of the groove;
the supporting block is vertically and fixedly arranged in the middle of the inner wall of the shell opposite to the opening of the shell;
the supporting groove is vertically arranged on the top surface of the supporting block, and an opening is formed in the outer side surface of the supporting groove;
the supporting plates are symmetrically arranged on the supporting grooves, arc-shaped grooves are formed in opposite side surfaces of the supporting plates, and the supporting plates are correspondingly positioned to form a hollow cylindrical structure and used for accommodating a drip cup of an infusion tube;
the second through hole is rectangular, is arranged on the bottom surface of the supporting block and is communicated with the supporting groove;
the power mechanism is vertically arranged on the inner wall of the shell opposite to the first through hole, the position of an output end of the power mechanism corresponds to that of the first through hole, and the outer side surface of the output end of the power mechanism is an arc surface;
the opening width of the through groove is smaller than the diameter of the infusion tube, the opening width of the supporting groove is smaller than the diameter of the drip cup, and the radian of the outer side face of the output end of the groove is consistent with that of the output end of the power mechanism.
Preferably, the method further comprises the following steps:
the temperature adjusting column is vertically arranged at the lower part of the inner wall of the shell opposite to the opening of the shell;
the bolt grooves are uniformly arranged on the temperature adjusting columns in the circumferential direction and are used for spirally winding the infusion tube;
the heating rod is arranged in the temperature adjusting column and used for heating the temperature adjusting column;
wherein the width of the notch of the spiral groove is smaller than the diameter of the infusion tube.
Preferably, the method further comprises the following steps:
the first notch is rectangular, is arranged on the top surface of the shell and is used for the penetration of an infusion tube;
the second notch is rectangular, is arranged on the bottom surface of the shell and is used for enabling the infusion tube to penetrate out;
the cover plate is arranged on the opening side of the shell, one end of the cover plate is hinged with the shell, and the cover plate is used for covering the opening of the shell;
a hand-held portion disposed on an outer side surface of the cover plate.
Preferably, the infusion support further comprises a fixing seat which is arranged in the middle of the outer side wall of the shell opposite to the opening of the shell and used for fixing the shell and the infusion support;
the fixing base includes:
the first clamping plate and the second clamping plate are mutually attached, and one end of each clamping plate is fixedly arranged on the shell;
the middle parts of the first clamping plate and the second clamping plate are arc-shaped, and through holes are correspondingly formed in the positions of the first clamping plate and the second clamping plate and used for accommodating and clamping the infusion frame tube;
the bolt holes are respectively arranged at the other ends of the first clamping plate and the second clamping plate and correspond to the bolt holes in position;
a bolt passing through the bolt hole;
a nut screwed with the bolt for clamping the first clamping plate and the second clamping plate;
wherein, the other end position of first splint and second splint corresponds forms the arc opening.
Preferably, the method further comprises the following steps:
the supporting sleeve net is arranged on the infusion support and used for hanging an infusion bottle or an infusion bag;
the heart rate bracelet is connected with the shell through a wire and used for detecting the heart rate.
Preferably, the method further comprises the following steps:
the infrared sensors are uniformly arranged on the supporting sleeve and are used for detecting the liquid level height of an infusion bottle or the inside of the infusion bag;
the photoelectric sensor is arranged on the supporting plate and used for detecting the dropping speed in the dropping pot of the infusion tube;
a plurality of temperature sensors provided on the temperature adjusting column and the housing for detecting a temperature of the temperature adjusting column and an ambient temperature;
the alarm device is arranged on the shell and can carry out infusion and fault alarm;
the controller, its with infrared sensor, photoelectric sensor, rhythm of the heart bracelet, temperature sensor, power unit and heating rod are connected, are used for receiving infrared sensor, photoelectric sensor, rhythm of the heart bracelet and temperature sensor's detection data, and control power unit and heating rod work.
A control method of an intelligent drip controller comprises a fuzzy controller:
the heart rate of the patient BbAnd the height H of the liquid level in the infusion bottle or the infusion bagbInputting a fuzzy controller in which the patient's heart rate BbAnd the height H of the liquid level in the infusion bottle or the infusion bagb7 grades are divided;
fuzzy controller output liquid medicine dripping speed v in transfusion tube drip cuplThe output is divided into 7 grades;
the patient heart rate BbHas a fuzzy domain of [3,5 ]]A quantization factor of 20; the temperature T of the patientbHas a fuzzy domain of [0, 1]]The quantification factor is 12; the dropping speed v of the liquid medicine in the drip cup of the output infusion tubelHas a fuzzy domain of [1,1.2 ]]The quantification factor is 50;
the fuzzy set of inputs and outputs is { NB, NM, NS, 0, PS, PM, PB }.
Preferably, according to the dropping speed v of the liquid medicine in the drip cup of the infusion tubelAnd the distance between the outer end surface of the output end of the control power mechanism and the bottom surface of the groove meets the following requirements:
Figure BDA0002570039420000041
wherein d is the distance between the outer end surface of the output end of the power mechanism and the bottom surface of the groove, r is the radius of the infusion tube, and v is the distance between the outer end surface of the output end of the power mechanism and the bottom surface of the groovelThe dropping speed v of the liquid medicine in the dropping pot of the transfusion tubel,maxThe maximum liquid medicine dropping speed in the drip cup of the transfusion tube, and pi is the circumferential rate.
Preferably, the fuzzy PID controller is further included:
deviation e and deviation change rate e of actual dropping speed and output dropping speed of liquid medicine in infusion tube drip cup for input of ith detection processcOutputting a proportional coefficient, a proportional integral coefficient and a differential coefficient of the PID, and inputting the proportional coefficient, the proportional integral coefficient and the differential coefficient into a PID controller to carry out error compensation control on the distance d between the outer end surface of the output end of the power mechanism and the bottom surface of the groove;
wherein the fuzzy domain of the deviation e between the actual dropping speed and the output dropping speed of the liquid medicine in the drip cup of the infusion tube is [ -1,1]The quantification factor is 5; rate of change of deviation ecHas a fuzzy domain of [ -1,1 [)]The quantification factor is 1.5;
the fuzzy domain of the proportional coefficient of the output PID is [ -1,1], and the quantification factor of the output PID is 0.1; the fuzzy domain of the proportional integral coefficient is [ -1,1], and the quantification factor of the proportional integral coefficient is 0.1; the ambiguity domain of the differential coefficient is [ -1,1], and the quantification factor of the differential coefficient is 0.0001;
the deviation e and the deviation change rate ec7 grades are divided; the proportional coefficient, the proportional integral coefficient and the differential coefficient of the output PID are divided into 7 grades;
the fuzzy set of the input and output of the fuzzy PID controller is { NB, NM, NS, 0, PS, PM, PB }.
Preferably, the method further comprises controlling the temperature of the temperature regulation column:
Figure BDA0002570039420000051
wherein, TsThe temperature of the temperature adjusting column is represented by L, the groove depth of the spiral groove is represented by R, the radius of the temperature adjusting column is represented by L, the axial length of the temperature adjusting column is represented by L,pifor the heat conduction efficiency of the temperature adjusting column, n is the number of winding turns of the infusion tube on the temperature adjusting column, r is the radius of the infusion tube, vlThe dropping speed v of the liquid medicine in the dropping pot of the transfusion tubel,maxThe maximum liquid medicine dropping speed in a drip cup of the transfusion tube, pi is the circumferential rate, TeIs the indoor temperature, e is the base of the natural logarithm, T0Is the initial temperature T of the liquid medicine0＝2℃。
The invention has the following beneficial effects:
(1) the intelligent drip controller designed and developed by the invention can automatically adjust the dripping speed of the liquid medicine in the drip cup, thereby adjusting the transfusion speed.
(2) The control method of the intelligent infusion control instrument designed and developed by the invention can determine the dropping speed of the liquid medicine in the drip cup based on a fuzzy control method, further control the action of the power mechanism and realize the automatic adjustment of the infusion speed. The invention can also control the temperature of the temperature adjusting column, control the infusion temperature and improve the comfort of infusion.
Drawings
Fig. 1 is a schematic structural diagram of the intelligent drip controller of the present invention.
Fig. 2 is a schematic structural diagram of the intelligent drip controller of the present invention.
Fig. 3 is a schematic structural diagram of the intelligent drip controller with a cover plate removed.
Fig. 4 is a schematic sectional structure diagram of the intelligent drip controller of the present invention.
Fig. 5 is a schematic sectional structure diagram of the intelligent drip controller of the present invention.
Fig. 6 is a schematic sectional structure diagram of the intelligent drip controller of the present invention.
FIG. 7 is a graph of patient heart rate B input to the fuzzy controller of the present inventionbA membership function graph of (1).
FIG. 8 shows the height H of the liquid level inside the input infusion bottle or infusion bag of the fuzzy controller of the present inventionbA membership function graph of (1).
FIG. 9 shows the dropping speed v of the liquid medicine in the drip cup of the output infusion tube of the fuzzy controllerlA membership function graph of (1).
FIG. 10 is a graph of the membership function of the input deviation e of the fuzzy PID controller of the present invention.
FIG. 11 is a graph of the input offset rate of change e of the fuzzy PID controller of the present inventioncA membership function graph of (1).
FIG. 12 is the output proportionality coefficient K of the fuzzy PID controller of the inventionpA membership function graph of (1).
FIG. 13 shows the output proportional-integral coefficient K of the fuzzy PID controller of the present inventioniA membership function graph of (1).
FIG. 14 is the output differential coefficient K of the fuzzy PID controller of the inventiondA membership function graph of (1).
Description of the reference numerals
100. A housing; 110. an adjusting block; 111. a through groove; 112. a first through hole; 113. a groove; 114. a baffle plate; 120. a power mechanism; 121. an output end; 130. a support block; 131. a support groove; 132. a support plate; 133. a second through hole; 140. a temperature regulating column; 141. a spiral groove; 150. a first notch; 160. a second notch; 170. a cover plate; 171. a hand-held portion; 180. a fixed seat; 181. a first splint; 182. a second splint; 183. a bolt; 184. and a nut.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
This invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather as being provided for the purpose of illustration and description. In the drawings, the size and relative sizes of structures and regions may be exaggerated for clarity.
As shown in fig. 1 to 6, the present invention provides an intelligent drip controller, comprising: a housing 100 having a hollow structure and an opening formed at one side thereof. An adjusting block 110 is vertically and fixedly provided on an upper portion of an inner wall of the casing 100 opposite to an opening of the casing 100. A through groove 111 is vertically provided on the adjusting block 110 in a penetrating manner, and an opening (i.e., a side opposite to the opening of the housing 100) is provided on an outer side thereof for accommodating the infusion tube. The opening width of the through groove 111 is smaller than the diameter of the infusion tube. Because the infusion tube is soft, the infusion tube can enter the through groove 111 along the opening of the through groove 111 under the action of external force, and is not easy to slide out, so that the infusion tube is convenient to fix. A first through hole 112, which is rectangular and communicates with the through groove 111, is provided on one side surface of the adjusting block 110 that is axially parallel to the through groove 111. A groove 113, which is arc-shaped and is vertically disposed on the side of the through groove 111 opposite to the first through hole 112, is disposed on the side of the through groove 111 opposite to the first through hole 112. A pair of baffles 114 is symmetrically arranged on both sides of the groove 113, so that the infusion tube can be stably placed in the groove 113 after entering the through groove 111. The inner wall of the housing 100 opposite to the first through hole 112 is vertically provided with a power mechanism 120, an output end 121 of the power mechanism 120 corresponds to the first through hole 112, an outer side surface of the output end 121 of the power mechanism 120 is an arc surface, and the arc surface is consistent with the arc surface of the groove 113. When the infusion tube is arranged in the groove 113, the output end 121 is controlled to extend or shorten through the power mechanism 120, so that the infusion tube is extruded or loosened, the dropping speed in the dropping pot of the infusion tube is further adjusted, and the dropping speed in the dropping pot of the infusion tube is 1-150 drops/min. The power mechanism is preferably a sliding table motor.
A support block 130 is vertically and fixedly provided at the middle of the inner wall of the casing 100 opposite to the opening of the casing 100. A supporting groove 131 is arranged on the top surface of the supporting block 130, and is vertically arranged on the top surface of the supporting block 130, and an opening is arranged on the outer side surface (the side surface opposite to the opening of the shell 100) for the drip cup of the infusion tube to enter. And the width of the opening is smaller than the diameter of the drip cup of the infusion tube, so that the drip cup enters the supporting groove 131 through external force and is not easy to slide out, and the drip cup can be fixed at two points conveniently. A pair of supporting plates 132 are symmetrically arranged on the opposite side surfaces of the supporting grooves 131, arc-shaped grooves are arranged on the opposite side surfaces of the supporting grooves, and the supporting plates are correspondingly arranged to form a hollow cylindrical structure and used for accommodating the infusion tube drip cup, so that the infusion tube drip cup can be conveniently fixed and the dripping speed of the liquid medicine in the infusion tube drip cup can be monitored. The bottom surface of the supporting block 130 is provided with a second through hole 133 which is rectangular and is communicated with the supporting groove 131, so that an infusion tube at the lower end of the infusion tube drip cup can conveniently penetrate out, and the width of the second through hole 133 is smaller than the diameter of the infusion tube drip cup, so that the infusion tube drip cup can not penetrate out when the infusion tube penetrates out, and the effect of supporting the infusion tube drip cup is achieved.
A temperature adjusting column 140 is vertically arranged at the lower part of the inner wall of the shell 100 opposite to the opening of the shell 100, and bolt grooves 141 are uniformly arranged on the outer side surface of the temperature adjusting column 140 in the circumferential direction and are used for spirally winding the infusion tube. And the width of the notch of the spiral groove 141 is smaller than the diameter of the infusion tube, because the infusion tube is soft, the infusion tube can enter the spiral groove 121 along the notch of the spiral groove 141 under the action of external force, and because the width of the notch of the spiral groove 141 is smaller than the diameter of the infusion tube, the infusion tube cannot easily slide out of the spiral groove 141 after entering the spiral groove 141, so that the infusion tube can be stably wound on the temperature adjusting column 140, and the temperature adjustment of the liquid medicine in the infusion tube is facilitated. A heating rod (not shown) is disposed in the temperature adjusting column 140 for heating the temperature adjusting column 140, so as to adjust the temperature of the infusion solution and improve the comfort of the infusion solution.
A first notch 150, which is rectangular, is provided on the top surface of the housing 100 communicating with the interior of the housing 100 for the infusion tube to pass through. And a second notch 160, which is rectangular and used for the infusion tube to pass through, is provided on the bottom surface of the housing 100 communicating with the inside of the housing 110. A cover plate 170 is provided at the opening side of the housing 100, and one end thereof is hinged to the housing to cover the opening of the 110. And a hand-held portion 171 is provided at an outer side of the cover plate 170 to facilitate opening or closing of the cover plate 170.
A fixing seat 180 is arranged in the middle of the outer side wall of the casing 100 opposite to the opening of the casing 100 and used for fixing the casing 100 on the infusion support. The fixing base 180 includes: the first and second clamping plates 181 and 182 are attached to each other and have one end fixed to the housing 180. The middle parts of the first clamping plate 181 and the second clamping plate 182 are arc-shaped, and through holes are correspondingly formed in the positions for accommodating and clamping infusion frame tubes. Bolt holes (not shown) are correspondingly formed at the other ends of the first clamping plate 181 and the second clamping plate 182, and the bolt holes are provided with bolts 183, and nuts 184 are threadedly connected with the bolts 183 for clamping the first clamping plate 181 and the second clamping plate 182. The first clamping plate 181 and the second clamping plate 182 are correspondingly formed with arc-shaped openings at the ends far away from the fixing plate 170, so that the transfusion frame tube can conveniently enter the through hole formed by the arc-shaped surrounding of the middle part through the arc-shaped openings.
A battery slot is also provided on the housing 100 for receiving a battery to supply power to the entire system. The structure is a common structure in the prior art, and therefore, the structure thereof is not described herein. And a wire is also arranged and can be directly connected with the socket for supplying power. The battery is preferably a lithium battery and is 4.8V/2000 mA. Under normal conditions, after the battery is fully charged (standard charging current 1A, charging time is 2 hours), the battery can be continuously used for more than 12 hours. The power supply was AC 220V, 50 Hz.
In this embodiment, the method further includes: and the supporting sleeve net (not shown in the figure) is hung on the infusion support and used for hanging an infusion bottle or an infusion bag. A heart rate bracelet (not shown in the figure) connected with the casing 100 through a wire (of course, the heart rate bracelet can also be connected through a wireless module) for detecting the heart rate of the infusion person.
In this embodiment, the method further includes: the infrared sensors are uniformly arranged on the supporting sleeve and used for detecting the liquid level height of the infusion bottle or the infusion bag; the photoelectric sensor is arranged on the supporting plate and used for detecting the dropping speed in the drip cup of the infusion tube; a plurality of temperature sensors provided on the temperature-adjusting column and the housing, for detecting a temperature of the temperature-adjusting column and an ambient temperature (i.e., an indoor temperature); and the controller is connected with the infrared sensor, the photoelectric sensor, the heart rate bracelet, the temperature sensor, the power mechanism and the heating rod, and is used for receiving detection data of the infrared sensor, the photoelectric sensor, the heart rate bracelet and the temperature sensor and controlling the power mechanism and the heating rod to work.
Still be provided with alarm device on the casing to be provided with outside mobile terminal, show each parameter of whole infusion process through the oled display screen, make the infusion visual. And an alarm device is also arranged on the external mobile terminal so as to carry out monitoring from time to time. When the battery is not powered, no liquid drips in the drip cup (two possibilities are available, one is that the infusion tube is transversely blocked, and the other is that the infusion is finished), the alarm can be given, the display screen displays the alarm, the indicator lamp emits light and gives an alarm sound, and meanwhile, the alarm signal is sent to the monitoring station. And when no liquid is detected in the infusion bottle and no liquid drips in the drip cup, the power mechanism controls the output end to move to extrude the infusion tube to stop infusion.
The intelligent drip controller designed and developed by the invention can automatically adjust the dripping speed of the liquid medicine in the drip cup, further adjust the infusion speed at any time, improve the infusion safety and reduce the labor cost.
The invention also provides a control method of the intelligent drip controller, the controller comprises a fuzzy controller and a fuzzy PID controller, and the method comprises the following steps:
step 1, the heart rate of a patient BbAnd the height H of the liquid level in the infusion bottle or the infusion bagbAnd the dropping speed v of the liquid medicine in the drip cup of the transfusion tubelCarrying out fuzzy processing; in the absence of control, patient heart rate BbHas a fuzzy domain of [3,5 ]]A quantization factor of 20; patient temperature TbHas a fuzzy domain of [0, 1]]The quantification factor is 12; the dropping speed v of the liquid medicine in the drip cup of the output infusion tubelHas a fuzzy domain of [1,1.2 ]]The quantification factor is 50. In order to ensure the control precision and realize better control, the optimal input and output levels are determined by repeated experiments, wherein, the heart rate B of the patient in the fuzzy controllerbAnd the height H of the liquid level in the infusion bottle or the infusion bagb7 grades are divided; the dropping speed v of the liquid medicine in the drip cup of the output infusion tubelThe output is divided into 7 grades; the fuzzy sets of the input and the output are { NB, NM, NS, 0, PS, PM, PB }, and the membership functions of the input and the output adopt triangular membership functions, which are shown in detail in FIGS. 7, 8 and 9. Wherein the fuzzy control rule of the fuzzy controller is as follows:
(1) patient heart rate BbConstant, liquid level height H in the infusion bagbReduce the dropping speed v of the liquid medicine in the drip cup of the infusion tubel；
(2) The height H of the liquid level in the infusion bagbA certain patient heart rate BbReduce the dropping speed v of the liquid medicine in the drip cup of the infusion tubel；
The specific control rule of the fuzzy control is detailed in the table I.
Speed v of dripping liquid medicine in drip cup of watch-infusion tubelFuzzy control table of
Figure BDA0002570039420000111
Input patient Heart Rate B of fuzzy controllerbAnd the height H of the liquid level in the infusion bottle or the infusion bagbThe dripping speed v of the liquid medicine in the drip cup of the output transfusion tube of the fuzzy controller is obtained by using the fuzzy control rule table IlSpeed v of dropping liquid medicine in dropping pot of transfusion tubelAnd (5) defuzzifying and pasting by using a gravity center method.
Step 2, according to the dropping speed v of the liquid medicine in the drip cup of the infusion tubelAnd the distance between the outer end surface of the output end of the control power mechanism and the bottom surface of the groove meets the following requirements:
Figure BDA0002570039420000112
wherein d is the distance between the outer end surface of the output end of the power mechanism and the bottom surface of the groove, r is the radius of the infusion tube, and v is the distance between the outer end surface of the output end of the power mechanism and the bottom surface of the groovelThe dropping speed v of the liquid medicine in the dropping pot of the transfusion tubel,maxThe maximum liquid medicine dropping speed in the drip cup of the transfusion tube, and pi is the circumferential rate.
Step 3, fuzzy PID controller
The deviation e and the deviation change rate e of the actual dropping speed and the output dropping speed of the liquid medicine in the dropping pot of the infusion tube in the ith detection processcOutputting the proportional coefficient, the proportional integral coefficient and the differential coefficient of the PID for fuzzy processing; in the absence of control, the ambiguity field for the deviation e is [ -1,1 [ ]]A quantization factor of 5; rate of change of deviation ecHas a fuzzy domain of [ -1,1 [)]The quantization factor is 1.5; proportional coefficient K of PIDpThe domain of ambiguity is [ -1,1 [ ]]The quantization factor is 0.1. Proportional integral coefficient K of PIDiThe domain of ambiguity is [ -1,1 [ ]]The quantization factor is 0.1; differential coefficient K of PIDdThe domain of ambiguity is [ -1,1 [ ]]The quantization factor was 0.0001. In order to ensure the control precision and realize better control, the optimal input and output levels are determined by repeated experiments, wherein the deviation e and the deviation change rate e in the fuzzy controllerc7 grades are divided; proportional coefficient and proportional product of output PIDThe fractional coefficient and the differential coefficient are divided into 7 grades; the fuzzy sets of the input and the output are { NB, NM, NS, 0, PS, PM, PB }, and the membership functions of the input and the output are triangular membership functions, as shown in detail in FIGS. 10-14. The fuzzy control rule is as follows:
1. when the deviation | e | is large, K is increasedpSo that the deviation is reduced rapidly, but a larger deviation change rate is generated at the same time, and a smaller K is requireddUsually take Ki＝0；
2. When the values of | ec | and | e | are in the middle and the like, K is properly reduced to avoid overshootpIs taken to be value of KiSmaller, select a proper size of Kd；
3. When the deviation | e | is smaller, K is increasedp，KiTo avoid the unstable oscillation phenomenon near the steady state value of the system, the value of (c) is usually equal to | ecWhen | is larger, take smaller Kd(ii) a When | ecWhen | is smaller, take the larger Kd(ii) a The specific fuzzy control rules are detailed in tables two, three and four.
Proportional coefficient K of table two PIDpFuzzy control table of
Figure BDA0002570039420000121
Proportional integral coefficient K of table three PIDiFuzzy control table of
Figure BDA0002570039420000131
Differential coefficient K of table four PIDdFuzzy control table of
Figure BDA0002570039420000132
Inputting the deviation e and deviation change rate ec of the actual dropping speed and the output dropping speed of the liquid medicine in the drip cup of the infusion tube in the ith detection process, outputting the proportional coefficient, the proportional integral coefficient and the differential coefficient of PID (proportion integration differentiation), defuzzifying the proportional coefficient, the proportional integral coefficient and the differential coefficient by using a height method, inputting a PID controller to carry out error compensation control on the distance d between the outer end surface of the output end of the power mechanism and the bottom surface of the groove, wherein the control formula is as follows:
Figure BDA0002570039420000133
and (3) repeatedly determining through experiments that the fuzzy PID controller accurately controls the distance d between the outer end surface of the output end of the power mechanism and the bottom surface of the groove, and the distance d between the outer end surface of the output end of the power mechanism and the bottom surface of the groove is the sum of the distance determined in the step (2) and the distance error compensation value of the PID controller, so that the distance d between the outer end surface of the output end of the power mechanism and the bottom surface of the groove is accurately controlled, and the deviation of the dropping speed in the drip cup of the infusion tube is smaller than.
And 4, controlling the temperature of the temperature adjusting column:
Figure BDA0002570039420000141
wherein, TsThe temperature of the temperature adjusting column is represented by L, the groove depth of the spiral groove is represented by R, the radius of the temperature adjusting column is represented by L, the axial length of the temperature adjusting column is represented by L,pifor the heat conduction efficiency of the temperature adjusting column, n is the number of winding turns of the infusion tube on the temperature adjusting column, r is the radius of the infusion tube, vlThe dropping speed v of the liquid medicine in the dropping pot of the transfusion tubel,maxThe maximum liquid medicine dropping speed in a drip cup of the transfusion tube, pi is the circumferential rate, TeIs the indoor temperature, e is the base of the natural logarithm, T0Is the initial temperature, T, of the liquid medicine0＝2℃。
The control method of the intelligent infusion control instrument designed and developed by the invention can determine the dropping speed of the liquid medicine in the drip cup based on a fuzzy control method, further control the action of the power mechanism and realize the automatic adjustment of the infusion speed. The invention can also control the temperature of the temperature adjusting column, control the infusion temperature and improve the comfort of infusion.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.

Claims (10)

1. An intelligent drip controller, comprising:
the shell is of a hollow structure, and an opening is formed in one side of the shell;
the adjusting block is vertically and fixedly arranged on the upper part of the inner wall of the shell opposite to the opening of the shell;
the through groove is vertically arranged on the adjusting block in a penetrating way, and the outer side surface of the through groove is provided with an opening for accommodating an infusion tube;
the first through hole is rectangular, is arranged on the side face of the adjusting block which is axially parallel to the through groove, and is communicated with the through groove;
the groove is arc-shaped, is vertically arranged on the side surface of the through groove opposite to the first through hole and corresponds to the first through hole;
the pair of baffles are symmetrically arranged at two sides of the groove;
the supporting block is vertically and fixedly arranged in the middle of the inner wall of the shell opposite to the opening of the shell;
the supporting groove is vertically arranged on the top surface of the supporting block, and an opening is formed in the outer side surface of the supporting groove;
the supporting plates are symmetrically arranged on the supporting grooves, arc-shaped grooves are formed in opposite side surfaces of the supporting plates, and the supporting plates are correspondingly positioned to form a hollow cylindrical structure and used for accommodating a drip cup of an infusion tube;
the second through hole is rectangular, is arranged on the bottom surface of the supporting block and is communicated with the supporting groove;
the power mechanism is vertically arranged on the inner wall of the shell opposite to the first through hole, the position of an output end of the power mechanism corresponds to that of the first through hole, and the outer side surface of the output end of the power mechanism is an arc surface;
the opening width of the through groove is smaller than the diameter of the infusion tube, the opening width of the supporting groove is smaller than the diameter of the drip cup, and the radian of the outer side face of the output end of the groove is consistent with that of the output end of the power mechanism.
2. The intelligent drip controller of claim 1, further comprising:
the temperature adjusting column is vertically arranged at the lower part of the inner wall of the shell opposite to the opening of the shell;
the bolt grooves are uniformly arranged on the temperature adjusting columns in the circumferential direction and are used for spirally winding the infusion tube;
the heating rod is arranged in the temperature adjusting column and used for heating the temperature adjusting column;
wherein the width of the notch of the spiral groove is smaller than the diameter of the infusion tube.
3. The intelligent drip controller of claim 1 or 2, further comprising:
the first notch is rectangular, is arranged on the top surface of the shell and is used for the penetration of an infusion tube;
the second notch is rectangular, is arranged on the bottom surface of the shell and is used for enabling the infusion tube to penetrate out;
the cover plate is arranged on the opening side of the shell, one end of the cover plate is hinged with the shell, and the cover plate is used for covering the opening of the shell;
a hand-held portion disposed on an outer side surface of the cover plate.
4. The intelligent drip controller according to claim 3, further comprising a fixing base disposed in the middle of the outer sidewall of the housing opposite to the opening of the housing for fixing the housing to a transfusion stand;
the fixing base includes:
the first clamping plate and the second clamping plate are mutually attached, and one end of each clamping plate is fixedly arranged on the shell;
the middle parts of the first clamping plate and the second clamping plate are arc-shaped, and through holes are correspondingly formed in the positions of the first clamping plate and the second clamping plate and used for accommodating and clamping the infusion frame tube;
the bolt holes are respectively arranged at the other ends of the first clamping plate and the second clamping plate and correspond to the bolt holes in position;
a bolt passing through the bolt hole;
a nut screwed with the bolt for clamping the first clamping plate and the second clamping plate;
wherein, the other end position of first splint and second splint corresponds forms the arc opening.
5. The intelligent drip controller of claim 2, further comprising:
the supporting sleeve net is arranged on the infusion support and used for hanging an infusion bottle or an infusion bag;
the heart rate bracelet is connected with the shell through a wire and used for detecting the heart rate.
6. The intelligent drip controller of claim 5, further comprising:
the infrared sensors are uniformly arranged on the supporting sleeve and are used for detecting the liquid level height of an infusion bottle or the inside of the infusion bag;
the photoelectric sensor is arranged on the supporting plate and used for detecting the dropping speed in the dropping pot of the infusion tube;
a plurality of temperature sensors provided on the temperature adjusting column and the housing for detecting a temperature of the temperature adjusting column and an ambient temperature;
the alarm device is arranged on the shell and can carry out infusion and fault alarm;
the controller, its with infrared sensor, photoelectric sensor, rhythm of the heart bracelet, temperature sensor, power unit and heating rod are connected, are used for receiving infrared sensor, photoelectric sensor, rhythm of the heart bracelet and temperature sensor's detection data, and control power unit and heating rod work.
7. A control method of an intelligent drip controller is characterized by comprising the following steps:
the heart rate of the patient BbAnd the height H of the liquid level in the infusion bottle or the infusion bagbInputting a fuzzy controller in which the patient's heart rate BbAnd the height H of the liquid level in the infusion bottle or the infusion bagb7 grades are divided;
fuzzy controller output liquid medicine dripping speed v in transfusion tube drip cuplThe output is divided into 7 grades;
the patient heart rate BbHas a fuzzy domain of [3,5 ]]A quantization factor of 20; the temperature T of the patientbHas a fuzzy domain of [0, 1]]The quantification factor is 12; the dropping speed v of the liquid medicine in the drip cup of the output infusion tubelHas a fuzzy domain of [1,1.2 ]]The quantification factor is 50;
the fuzzy set of inputs and outputs is { NB, NM, NS, 0, PS, PM, PB }.
8. The control method of the intelligent drip controller according to claim 7, wherein the dripping speed v is determined according to the dripping speed of the liquid medicine in the drip cup of the infusion tubelAnd the distance between the outer end surface of the output end of the control power mechanism and the bottom surface of the groove meets the following requirements:
Figure FDA0002570039410000031
wherein d is the distance between the outer end surface of the output end of the power mechanism and the bottom surface of the groove, r is the radius of the infusion tube, and v is the distance between the outer end surface of the output end of the power mechanism and the bottom surface of the groovelThe dropping speed v of the liquid medicine in the dropping pot of the transfusion tubel,maxThe maximum liquid medicine dropping speed in the drip cup of the transfusion tube, and pi is the circumferential rate.
9. The method of controlling an intelligent drip controller of claim 8 further comprising a fuzzy PID controller:
inputting the deviation e and the deviation change rate ec of the actual dropping speed and the output dropping speed of the liquid medicine in the drip cup of the infusion tube in the ith detection process, and outputting the proportional coefficient, the proportional integral coefficient and the differential coefficient of the PID, and inputting the proportional coefficient, the proportional integral coefficient and the differential coefficient into a PID controller to carry out error compensation control on the distance d between the outer end surface of the output end of the power mechanism and the bottom surface of the groove;
wherein the fuzzy domain of the deviation e between the actual dropping speed and the output dropping speed of the liquid medicine in the drip cup of the infusion tube is [ -1,1], and the quantification factor is 5; the fuzzy domain of the deviation change rate ec is [ -1,1], and the quantification factor is 1.5;
the fuzzy domain of the proportional coefficient of the output PID is [ -1,1], and the quantification factor of the output PID is 0.1; the fuzzy domain of the proportional integral coefficient is [ -1,1], and the quantification factor of the proportional integral coefficient is 0.1; the ambiguity domain of the differential coefficient is [ -1,1], and the quantification factor of the differential coefficient is 0.0001;
the deviation e and the deviation change rate ec are divided into 7 grades; the proportional coefficient, the proportional integral coefficient and the differential coefficient of the output PID are divided into 7 grades;
the fuzzy set of the input and output of the fuzzy PID controller is { NB, NM, NS, 0, PS, PM, PB }.
10. The method of controlling an intelligent drip controller of claim 7, 8 or 9, further comprising controlling the temperature of the temperature regulating column:
Figure FDA0002570039410000041
wherein, TsThe temperature of the temperature adjusting column is represented by L, the groove depth of the spiral groove is represented by R, the radius of the temperature adjusting column is represented by L, the axial length of the temperature adjusting column is represented by L,pifor the heat conduction efficiency of the temperature adjusting column, n is the number of winding turns of the infusion tube on the temperature adjusting column, r is the radius of the infusion tube, vlThe dropping speed v of the liquid medicine in the dropping pot of the transfusion tubel,maxThe maximum liquid medicine dropping speed in a drip cup of the transfusion tube, pi is the circumferential rate, TeIs the indoor temperature, e is the base of the natural logarithm, T0Is the initial temperature T of the liquid medicine0＝2℃。
CN202010637620.1A 2020-07-05 2020-07-05 Intelligent infusion control instrument and control method thereof Pending CN111643776A (en)

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