CN110975063A - Infusion flow rate control and method - Google Patents
Infusion flow rate control and method Download PDFInfo
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- CN110975063A CN110975063A CN201911338010.5A CN201911338010A CN110975063A CN 110975063 A CN110975063 A CN 110975063A CN 201911338010 A CN201911338010 A CN 201911338010A CN 110975063 A CN110975063 A CN 110975063A
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- 238000001802 infusion Methods 0.000 title claims abstract description 74
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000007788 liquid Substances 0.000 claims description 25
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 239000000741 silica gel Substances 0.000 claims description 10
- 229910002027 silica gel Inorganic materials 0.000 claims description 10
- 230000001276 controlling effect Effects 0.000 claims description 2
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 238000001125 extrusion Methods 0.000 description 5
- 239000011159 matrix material Substances 0.000 description 2
- 230000000474 nursing effect Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 206010019280 Heart failures Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
- A61M5/16877—Adjusting flow; Devices for setting a flow rate
- A61M5/16881—Regulating valves
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- Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention designs and develops a transfusion flow rate controller, which comprises: the inner wall of the outer shell is provided with a plurality of diagonal line grooves distributed in an array mode along the length direction; the inner stud is a hollow cylinder, the surface of the inner stud is provided with an external thread, and the side wall of the internal thread is provided with a plurality of through sliding grooves along the length direction; one end of each clearance adjusting rod is arranged in the inclined wire groove in a sliding mode, and the other end of each clearance adjusting rod can extend into the through sliding groove and slide along the through sliding groove; the nut is sleeved on the inner stud and is in threaded fit with the inner stud; the invention can extrude the infusion tube through the gaps between the gap adjusting rods to realize flow rate adjustment, and the invention also provides an infusion flow rate control method.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to an infusion flow rate controller and an infusion control method.
Background
The current transfusion flow rate controller used clinically can be operated by a single hand of a common transfusion regulator, and can realize stepless regulation of the transfusion flow rate, but because the transfusion catheter is a flexible pipe with elasticity and smooth surface, the pulley can be pushed from a set position or even pushed away to complete slipping in the transfusion process, so that the transfusion flow rate is out of control, and the transfusion flow rate exceeding the preset speed can cause serious medical accidents of heart failure, death and the like of patients clinically, thereby forming serious potential safety hazards. The method for clinically finding the drift of the infusion flow rate and timely correcting the drift of the infusion flow rate by increasing the patrol and calibration times of the nursing staff avoids the harm caused by the condition, but the method obviously increases the work of the nursing staff to seriously affect the accuracy of the infusion flow rate, and the position of the roller and the flow rate adjusting process usually realize the adjustment and control of the infusion flow rate by combining the personal experience of a nurse with the flow rate of liquid drops in an infusion drip cup, but the risk of overlarge error of the infusion flow rate is brought.
Application number 201910575863.4's patent application discloses an transfer line wriggling extrusion pump, exists the extrusion passageway extrusion subassembly that is used for laying the transfer line between runner assembly and the shell, and the extrusion subassembly is including first rolling disc and the second rolling disc that can relative rotation, and then changes the size of extrusion passageway, realizes the velocity of flow and adjusts, though can guarantee that the atress of transfer line is even like this, guarantees transfer line elasticity, nevertheless can not guarantee the regulation precision of transfusion system still.
The patent application No. 201510974910.4 discloses a transfusion flow rate regulator, be equipped with on the unable adjustment base with the communicating regulating rod passageway of liquid flow channel, be equipped with movable regulating rod in the regulating rod passageway, the water tightness is sealed between regulating rod and regulating rod passageway, through the adjustment the cross-sectional area that liquid flow channel supplied liquid to pass through is adjusted to the bottom shape of regulating rod and the overlap area adjustment of liquid flow channel's cross sectional shape, although can prevent to adjust the gyro wheel slippage, positioning groove is the echelonment along the circumference and distributes, positioning groove depressed center point height descends along clockwise progressively, but ladder positioning groove altitude variation is discontinuous, can lead to the velocity of flow to adjust incoherently, influences the velocity of flow and adjusts the precision.
Disclosure of Invention
According to the infusion flow speed controller, the nut can push the gap adjusting rod to slide along the inclined line groove, so that the depth of the gap adjusting rod extending into the through sliding groove is changed, and an infusion tube is extruded through gaps among the gap adjusting rods, so that the flow speed is adjusted.
The invention also provides a transfusion flow velocity control method, which can adjust the gap between the gap adjusting rods according to the change rate of the flow velocity adjusting coefficient and the revolution of the liquid drop flow velocity of the drip cup of the transfusion device to the hollow motor, thereby realizing the fine adjustment of the transfusion device flow velocity.
The technical scheme of the invention is as follows:
an infusion flow rate controller comprising:
the inner wall of the outer shell is provided with a plurality of diagonal line grooves distributed in an array mode along the length direction;
the inner stud is a hollow cylinder, the surface of the inner stud is provided with an external thread, and the side wall of the internal thread is provided with a plurality of through sliding grooves along the length direction;
one end of each clearance adjusting rod is arranged in the inclined wire groove in a sliding mode, and the other end of each clearance adjusting rod can extend into the through sliding groove and slide along the through sliding groove;
the nut is sleeved on the inner stud and is in threaded fit with the inner stud;
the nut slides along the inner stud, the gap adjusting rod can be pushed to slide along the inclined wire groove, and the depth of the gap adjusting rod extending into the through sliding groove is changed.
Preferably, the outer shell is conical, and the inclined line groove is a groove formed along the inner wall of the conical outer shell.
Preferably, the outer shell is cylindrical, and the oblique line groove is an oblique line groove with gradually reduced depth along the oblique inner wall of the outer shell.
Preferably, still include the silica gel go-between, it is the annular, sets up shell body one end can overlap and establish on the transfer line.
The sliding part is embedded in the groove;
a sliding rod, one end of which is connected with the sliding part;
and the rotating wheel is rotatably supported at the other end of the sliding rod.
Preferably, the rotating wheel is a rubber wheel, and the surface of the rotating wheel is provided with anti-skid projections.
Preferably, a resistance spring is arranged in the inclined wire groove, one end of the resistance spring is arranged in the inclined wire groove, and the other end of the resistance spring is connected with the gap adjusting rod.
Preferably, the nut is rotated by a hollow motor.
A fuzzy control method for an infusion flow rate controller, comprising:
calculating the flow velocity adjusting coefficient of the gap adjusting rod according to the self parameters of the transfusion flow velocity controller;
detecting the flow velocity of liquid drops of a drip cup of the infusion apparatus;
comparing the flow velocity adjusting coefficient of the gap adjusting rod with a preset flow velocity adjusting coefficient of the gap adjusting rod to obtain a flow velocity adjusting coefficient deviation signal, and comparing the liquid drop flow velocity of the drip cup of the infusion apparatus with the liquid drop flow velocity of the drip cup of the infusion apparatus to obtain a liquid drop flow velocity deviation signal of the drip cup of the infusion apparatus;
carrying out differential calculation on the flow velocity regulation coefficient deviation signal to obtain a flow velocity regulation coefficient change rate signal, and carrying out differential calculation on the droplet flow velocity deviation signal to obtain a droplet flow velocity change rate signal;
and amplifying the regulating coefficient change rate signal and the liquid drop flow velocity change rate signal, inputting the amplified signals into a two-dimensional fuzzy controller, and outputting the amplified signals as the revolution of the hollow motor.
Preferably, the flow velocity adjustment coefficient of the gap adjustment lever is calculated by the following formula:
wherein ξ is the flow rate adjustment coefficient, δinmIs a diagonal groove angle, LZIs the length of the inner screw column, LXFor adjusting the length of the rod by clearance, u is the outside diameter of the runner, bmIs the distance between the threads on the inner stud, Z1Is the width of the nut, KAIs the coefficient of kinetic force, KVIs the dynamic load coefficient.
The invention has the beneficial effects that:
according to the infusion flow speed controller, the nut can push the gap adjusting rod to slide along the inclined line groove, so that the depth of the gap adjusting rod extending into the through sliding groove is changed, and an infusion tube is extruded through gaps among the gap adjusting rods, so that the flow speed is adjusted.
The gap adjusting rods provided by the invention are multiple, the infusion tube is extruded in multiple directions, the gap adjusting rods are prevented from slipping, the stress on the infusion tube is uniform, and the adjusting precision is high.
The infusion flow rate controller provided by the invention is fixed on the infusion tube through the silica gel connecting ring, so that the controller can be effectively prevented from slipping.
Drawings
FIG. 1 is a schematic view of an infusion flow rate controller according to the present invention.
Fig. 2 is a schematic structural diagram of the outer shell according to the present invention.
Fig. 3 is a schematic structural view of the internal stud according to the present invention.
Fig. 4 is a schematic structural view of the gap adjusting lever according to the present invention.
Fig. 5 is a schematic view of the matching structure of the inner stud and the nut according to the present invention.
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.
As shown in fig. 1, the present invention provides an infusion flow rate controller comprising: the method comprises the following steps: an outer housing 110, an inner stud 120, a plurality of lash adjusters 130, and a nut 140.
As shown in fig. 2, the outer shell 110 is a frustum-shaped shell, the inner wall of the outer shell has a plurality of diagonal slots 111 distributed in an array manner along the length direction, one end of the outer shell 110 has a cut-off end, the cut-off end has a circular hole, and a silica gel connection ring 112 is detachably disposed in the cut-off end, and the silica gel connection ring 112 can be sleeved on the infusion tube and fix the silica gel connection ring 112 on the outer shell 110.
In another embodiment, the outer shell 110 is cylindrical, and the diagonal groove is a diagonal groove with decreasing depth along the inner wall of the outer shell.
As shown in fig. 3, the inner stud 120 is a hollow cylinder, and the surface of the inner stud has an external thread 121, the side wall of the inner stud 120 has a plurality of through sliding slots 122 along the length direction, and preferably, the number of the through sliding slots 122 is 4 or 6, and both ends of the inner stud 120 have stop ring holes 123.
As shown in fig. 4, the number of the gap adjusting rods 130 is the same as that of the through chutes 122, wherein one end of each of the gap adjusting rods 130 is slidably disposed in the inclined line groove 111, and the other end thereof is slidable along the through chute 122 in the through chute, and the gap adjusting rods 130 include: a sliding part 131, a sliding rod 132 and a rotating wheel 133, wherein the sliding part 131 is embedded in the inclined wire groove 111; one end of the sliding rod 132 is connected with the sliding part 131; the pulley 133 is rotatably supported at the other end of the slide lever 132. Preferably, the wheel 133 is a rubber wheel with anti-slip protrusions on its surface
As shown in fig. 5, the nut 140 is sleeved on the inner stud 120 and is in threaded fit with the inner stud 120;
the nut 140 slides along the inner threaded post 120, and can push the gap adjusting rod 130 to slide along the inclined wire groove 111, so as to change the depth of the gap adjusting rod 130 extending into the through chute 122, and the ends of the gap adjusting rod 130 with the rotating wheels are arranged oppositely, so as to form an accommodating space of the infusion tube. The accommodating space of the infusion tube is changed by changing the gap between the gap adjusting rods 130, the acting force of the outer wall of the infusion tube is changed, and the flow velocity adjustment is realized.
Preferably, the inclined line groove 111 has a resistance spring therein, and one end thereof is disposed in the inclined line groove and the other end thereof is connected to the gap adjustment lever 130.
In another embodiment, the nut 140 is rotated by a hollow motor 150.
The operation of the infusion flow rate controller is taken as an example for further explanation
The outer shell 110 and the inner screw column 120 are sleeved on the infusion tube, the outer shell 110 and the infusion tube are fixed through the silica gel connecting ring 112, the silica gel connecting ring 112 is made of silica gel, the infusion flow rate controller can be fixed on the infusion tube, and the infusion flow rate controller is prevented from sliding off.
The hollow motor 150 drives the nut 140 to rotate, the nut 140 slides along the inner threaded column 120, the gap adjusting rod 130 can be pushed to slide along the inclined wire groove 111, the depth of the gap adjusting rod 130 extending into the through sliding groove 122 is further changed, one end of the gap adjusting rod 130 with the rotating wheel is arranged oppositely, and an accommodating space of the infusion tube is formed. The accommodating space of the infusion tube is changed by changing the gap between the gap adjusting rods 130, the acting force of the outer wall of the infusion tube is changed, and the flow velocity adjustment is realized.
One end of the resistance spring is arranged in the inclined wire groove, and the other end of the resistance spring is connected with the clearance adjusting rod 130, so that the clearance adjusting rod can be prevented from slipping.
According to the infusion flow speed controller, the nut can push the gap adjusting rod to slide along the inclined line groove, so that the depth of the gap adjusting rod extending into the through sliding groove is changed, and an infusion tube is extruded through gaps among the gap adjusting rods, so that the flow speed is adjusted.
The gap adjusting rods provided by the invention are multiple, the infusion tube is extruded in multiple directions, the gap adjusting rods are prevented from slipping, the stress on the infusion tube is uniform, and the adjusting precision is high.
The infusion flow rate controller provided by the invention is fixed on the infusion tube through the silica gel connecting ring, so that the controller can be effectively prevented from slipping.
A method of controlling infusion flow rate, comprising:
calculating the flow velocity adjusting coefficient of the gap adjusting rod according to the self parameters of the transfusion flow velocity controller; the flow velocity adjusting coefficient of the clearance adjusting rod is calculated by the following formula:
wherein ξ is the flow rate adjustment coefficient, δinmIs a diagonal groove angle, LZIs the length of the inner screw column, LXFor adjusting the length of the rod by clearance, u is the outside diameter of the runner, bmIs the distance between the threads on the inner stud, Z1Is the width of the nut, KAIs the coefficient of kinetic force, KVIs the dynamic load coefficient. Detecting the flow velocity of liquid drops of a drip cup of the infusion apparatus;
the flow rate regulating coefficient ξ of the gap regulating rod and the drop flow rate v of the drip cup of the transfusion deviceiInput to a fuzzy controller.
ξ, v, among othersiRespectively is [70,150 ]]，[0,40]The flow rate adjustment coefficient ξ of the gap adjustment rod is compared with the preset flow rate adjustment coefficient of the gap adjustment rod
Make a ratioComparing the obtained flow velocity adjusting coefficient deviation signal of the gap adjusting rod, and adjusting the flow velocity v of the liquid drops of the drip cup of the infusion apparatusiThe flow velocity v of liquid drops of a drip cup of a preset infusion apparatusiComparing to obtain a temperature deviation signal;
the flow velocity adjusting coefficient deviation signal of the gap adjusting rod is subjected to differential calculation to obtain a flow velocity adjusting coefficient change rate signal FiThe liquid drop flow velocity of the drip cup of the infusion apparatus is subjected to differential calculation to obtain a liquid drop flow velocity change rate signal G of the drip cup of the infusion apparatusi；
Fi、GiAre all { -6, -5, -4, -3, -2, -1, 0,1, 2, 3, 4, 5, 6}
Then the scale factor k1＝6/80，k2＝6/40
Defining fuzzy subsets and membership functions
Signal F for adjusting the rate of change of flow rate coefficientiSeven fuzzy states are divided: PB (positive big), PM (positive middle), PS (positive small), 0 (zero), NS (negative small), NM (negative middle) and NB (negative big), and a flow rate regulation coefficient change rate signal F is obtained by combining experienceiAs shown in table 1.
TABLE 1 Rate of flow adjustment coefficient of Change signal FiTable of membership functions
Signal G for changing the flow rate of liquid drops in drip cup of infusion apparatusiSeven fuzzy states are divided: PB (positive big), PM (positive middle), PS (positive small), 0 (zero), NS (negative small), NM (negative middle) and NB (negative big), and the liquid drop flow rate change rate signal G of the drip cup of the infusion apparatus is obtained by combining experienceiAs shown in table 2.
TABLE 2 liquid drop flow rate change signal G for drip cup of infusion apparatusiTable of membership functions
| Gi | -6 | -5 | -4 | -3 | -2 | -1 | 0 | 1 | 2 | 3 | 4 | 5 |
| PB | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.2 | 0.4 | 0 |
| PM | 0 | 0 | 0.6 | 0 | 0.2 | 0.4 | 0 | 0 | 0.2 | 0 | 0 | 0 |
| PS | 0 | 0 | 0 | 0.2 | 0.4 | 0.6 | 0 | 0 | 0.4 | 0.2 | 0 | 0 |
| 0 | 0 | 0 | 0.2 | 0.4 | 0.6 | 0.8 | 1.0 | 0 | 0.6 | 0.4 | 0.4 | 0 |
| NS | 0.2 | 0.4 | 0.4 | 0.8 | 0.8 | 0 | 0 | 0 | 0.8 | 0.8 | 0.8 | 0.2 |
| NM | 0.6 | 0.8 | 0.8 | 0 | 0 | 0 | 0.6 | 0 | 0 | 0 | 1.0 | 0.6 |
| NB | 0.2 | 0.4 | 0.4 | 0.8 | 0.8 | 1.0 | 1.0 | 1.0 | 0.8 | 0.8 | 0.8 | 0.2 |
The fuzzy inference process is acquired by executing complex matrix operation, the calculated amount is very large, the on-line inference is difficult to meet the real-time requirement of a control system, the fuzzy inference operation is carried out by adopting a table look-up method, a fuzzy inference decision adopts a two-input and single-output mode, the preliminary control rule of a fuzzy controller can be summarized through experience, the fuzzy controller carries out defuzzification on an output signal according to the obtained fuzzy value to obtain a fault level gamma, a fuzzy control query table is solved, and the fault level Z control rule is obtained by adopting single-point fuzzification as the domain is discrete and the fuzzy control rule can be expressed as a fuzzy matrix.
Table 3 is a fuzzy control rule table
The fuzzy set of hollow motor revolutions is: z ═ D0，D1，D2，D3，D4，D5}，D0Connecting the valve body for closing the conduit, D1For the first revolution, D2For a second number of revolutions, D3For the third revolution, D4For a fourth revolution, D5Is the fifth revolution; wherein the number of revolution of the hollow motor is D1The number of revolution of the corresponding hollow motor is minimum, and the number of revolution of the hollow motor is D5The corresponding hollow motor has the maximum revolution.
The invention can adjust the gap between the gap adjusting rods according to the change rate of the flow velocity adjusting coefficient and the revolution of the liquid drop flow velocity of the drip cup of the infusion apparatus to the hollow motor, thereby realizing the fine adjustment of the flow velocity of the infusion apparatus.
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 infusion flow rate controller, comprising:
the inner wall of the outer shell is provided with a plurality of diagonal line grooves distributed in an array mode along the length direction;
the inner stud is a hollow cylinder, the surface of the inner stud is provided with external threads, and the side wall of the inner stud is provided with a plurality of through sliding grooves along the length direction;
one end of each clearance adjusting rod is arranged in the inclined wire groove in a sliding mode, and the other end of each clearance adjusting rod can extend into the through sliding groove and slide along the through sliding groove;
the nut is sleeved on the inner stud and is in threaded fit with the inner stud;
the nut slides along the inner stud, the gap adjusting rod can be pushed to slide along the inclined wire groove, and the depth of the gap adjusting rod extending into the through sliding groove is changed.
2. The infusion flow rate controller according to claim 1, wherein the outer housing is tapered, and the diagonal groove is a groove provided along an inner wall of the tapered outer housing.
3. The infusion flow rate controller according to claim 1, wherein the outer housing is cylindrical, and the diagonal groove is a diagonal groove having a depth decreasing obliquely along an inner wall of the outer housing.
4. The infusion flow rate controller according to claim 2, further comprising a silica gel connection ring, which is annular and is disposed at one end of the outer casing and can be sleeved on the infusion tube.
5. The infusion flow rate controller according to claim 3, wherein the gap adjustment lever comprises:
a sliding part embedded in the inclined wire groove;
a sliding rod, one end of which is connected with the sliding part;
and the rotating wheel is rotatably supported at the other end of the sliding rod.
6. The infusion flow rate controller according to claim 5, wherein the runner is a rubber wheel having a surface with anti-slip protrusions.
7. The infusion flow rate controller according to claim 6, wherein the diagonal groove has a resistance spring therein, one end of which is disposed in the diagonal groove and the other end of which is connected to the gap adjustment lever.
8. The infusion flow rate controller according to claim 7, wherein the nut is rotated by a hollow motor.
9. A method of controlling infusion flow rate, using the infusion flow rate controller of any one of claims 1-8, comprising:
calculating the flow velocity adjusting coefficient of the gap adjusting rod according to the self parameters of the transfusion flow velocity controller;
detecting the flow velocity of liquid drops of a drip cup of the infusion apparatus;
comparing the flow velocity adjusting coefficient of the gap adjusting rod with a preset flow velocity adjusting coefficient of the gap adjusting rod to obtain a flow velocity adjusting coefficient deviation signal, and comparing the liquid drop flow velocity of the drip cup of the infusion apparatus with the liquid drop flow velocity of the drip cup of the infusion apparatus to obtain a liquid drop flow velocity deviation signal of the drip cup of the infusion apparatus;
carrying out differential calculation on the flow velocity regulation coefficient deviation signal to obtain a flow velocity regulation coefficient change rate signal, and carrying out differential calculation on the droplet flow velocity deviation signal to obtain a droplet flow velocity change rate signal;
and amplifying the regulating coefficient change rate signal and the liquid drop flow velocity change rate signal, inputting the amplified signals into a two-dimensional fuzzy controller, and outputting the amplified signals as the revolution of the hollow motor.
10. The fuzzy control method of an infusion flow rate controller according to claim 9, wherein the flow rate adjustment coefficient of the gap adjustment lever is calculated by the formula:
wherein ξ is the flow rate adjustment coefficient, δinmIs a diagonal groove angle, LZIs the length of the inner screw column, LXFor adjusting the length of the rod by clearance, u is the outside diameter of the runner, bmIs the distance between the threads on the inner stud, Z1Is the width of the nut, KAIs the coefficient of kinetic force, KVIs the dynamic load coefficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911338010.5A CN110975063A (en) | 2019-12-23 | 2019-12-23 | Infusion flow rate control and method |
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| CN201911338010.5A CN110975063A (en) | 2019-12-23 | 2019-12-23 | Infusion flow rate control and method |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040102738A1 (en) * | 2002-11-26 | 2004-05-27 | Medical Ventures, L.L.C. | Pressure actuated flow control valve |
| CN201492759U (en) * | 2009-11-25 | 2010-06-02 | 李图远 | Infusion flow velocity regulator |
| CN203227121U (en) * | 2013-03-21 | 2013-10-09 | 北京伏尔特技术有限公司 | Flow setting and fine-tuning device |
| DE102014213576A1 (en) * | 2014-07-11 | 2016-01-14 | B. Braun Melsungen Ag | Flow control device for a hose line of a medical infusion system |
| US20170333627A1 (en) * | 2016-05-19 | 2017-11-23 | B. Braun Melsungen Ag | Through-flow regulating device for a hose line of a medical infusion system |
| US20180360688A1 (en) * | 2016-08-03 | 2018-12-20 | Hanvit Md Co., Ltd | Infusion flow-rate regulating device |
| CN110141723A (en) * | 2019-06-04 | 2019-08-20 | 苏州慧尔生医疗科技有限公司 | A kind of infusion controller |
| CN211658936U (en) * | 2019-12-23 | 2020-10-13 | 华中科技大学同济医学院附属协和医院 | Infusion flow rate controller |
-
2019
- 2019-12-23 CN CN201911338010.5A patent/CN110975063A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040102738A1 (en) * | 2002-11-26 | 2004-05-27 | Medical Ventures, L.L.C. | Pressure actuated flow control valve |
| CN201492759U (en) * | 2009-11-25 | 2010-06-02 | 李图远 | Infusion flow velocity regulator |
| CN203227121U (en) * | 2013-03-21 | 2013-10-09 | 北京伏尔特技术有限公司 | Flow setting and fine-tuning device |
| DE102014213576A1 (en) * | 2014-07-11 | 2016-01-14 | B. Braun Melsungen Ag | Flow control device for a hose line of a medical infusion system |
| US20170333627A1 (en) * | 2016-05-19 | 2017-11-23 | B. Braun Melsungen Ag | Through-flow regulating device for a hose line of a medical infusion system |
| US20180360688A1 (en) * | 2016-08-03 | 2018-12-20 | Hanvit Md Co., Ltd | Infusion flow-rate regulating device |
| CN110141723A (en) * | 2019-06-04 | 2019-08-20 | 苏州慧尔生医疗科技有限公司 | A kind of infusion controller |
| CN211658936U (en) * | 2019-12-23 | 2020-10-13 | 华中科技大学同济医学院附属协和医院 | Infusion flow rate controller |
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Application publication date: 20200410 |