CN205796165U - A kind of intravenous medicinal liquid drips velocity control device - Google Patents
A kind of intravenous medicinal liquid drips velocity control device Download PDFInfo
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- CN205796165U CN205796165U CN201620302066.0U CN201620302066U CN205796165U CN 205796165 U CN205796165 U CN 205796165U CN 201620302066 U CN201620302066 U CN 201620302066U CN 205796165 U CN205796165 U CN 205796165U
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- outfan
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Abstract
This utility model discloses a kind of intravenous medicinal liquid and drips velocity control device, is made up of control unit, performance element and feedback unit.User instructs generation medicinal liquid according to the working interface in display device and drips speed set-point；Then controller module produces control instruction according to Fuzzy PID, actuator module (i.e. motor) is tightened up according to control instruction or loosens medicinal liquid plastic tube, the current speed signal that drips is measured and is fed back to controller by feedback mechanism module again simultaneously, in order to carry out sending of control instruction next time.This utility model has that control accuracy is high, effective, the advantage of working stability.
Description
Technical field
This utility model relates to medical treatment venous transfusion and controls technical field, is specifically related to a kind of intravenous medicinal liquid and drips speed
Control device.
Background technology
The technical operation that venous transfusion is relevant is a most important job in nursing, and venous transfusion is again clinical conventional
One of route of administration, gives the medicinal liquid of quantity within the unit interval, plays a role the effect for the treatment of disease.Therefore exist
In venous transfusion operating process, a key link is that the medicinal liquid kind etc. according to patient age, physical condition and injection is come
Control medicinal liquid drips speed.During tradition drips velocity modulation joint, medical personnel need manual operation plastic pipe clip, by tightening up or loosening
Plastic pipe clip changes medicinal liquid flow, is finally reached control medicinal liquid and drips the purpose of speed.This traditional Artificial Control mode operates
Simply, it is easy to accomplish, but its realtime control is poor, and control accuracy is the highest, considerably increases the probability that malpractice occurs.
Additionally, manually operated mode cannot carry out unified monitoring to the transfusion of multiple patients, also transfusion process cannot be carried out completely
Record, be unfavorable for the information system management of hospital, drawback is the most obvious.Therefore, according to the feature of venous transfusion process, design one
Planting suitable automatic control algorithm and device, intellectuality and Informatization Development for infusion process are significant.
The algorithm dripped in terms of speed control currently for medicinal liquid is mainly based upon degenerative preset parameter PID
(Proportion Integral Derivative, PID) controls.Although this kind of method realizes simple, but control effect also
Undesirable.First its shortcoming mainly includes two aspects that, feedback element time delay is relatively big, and time delay length also can be with the change dripping speed
And change, when dripping speed and being slower, obtain feedback information and be also required to the longer time, control accuracy may be caused to reduce, stability
It is deteriorated.Secondly, control performance is poor, due to performance element (motor) rotate step-length and medicinal liquid to drip speed be not strict the most right
Should be related to, under different transfusion speeds, the step-length that electric machine rotation is identical may cause different impacts, when given medicine to dripping speed
When drop speed value amplitude of variation is bigger, preset parameter pid algorithm is difficult to carry out quick control according to designated precision.
Utility model content
Technical problem to be solved in the utility model is that the existing medicinal liquid to venous transfusion drips the method that speed is controlled
The existing low and slow-footed problem of precision, it is provided that a kind of intravenous medicinal liquid drips velocity control device.
For solving the problems referred to above, this utility model is achieved through the following technical solutions:
A kind of intravenous medicinal liquid drips velocity control device, is made up of control unit, performance element and feedback unit；Above-mentioned
Control unit includes given input circuit and controller module；Above-mentioned performance element includes drive circuit, motor and transmission
Mechanism；Above-mentioned feedback unit includes photoelectric sensor and Schmitt trigger.The outfan of given input circuit connects controller
The given input of module.The control output end of controller module connects the input of drive circuit, the outfan of drive circuit
Being connected with the input of motor, the outfan of motor connects the input of drive mechanism, the outfan of drive mechanism
Connect controlled device i.e. medicinal liquid folder.Photoelectric sensor is just to transfusion drip tube, and the outfan of photoelectric sensor connects Schmitt to be triggered
The input of device, the outfan of Schmitt trigger connects the feedback input end of controller module.
In said apparatus, described controller module includes multiplier, fuzzy controller, PID controller and switching switch structure
Become；Multiplier one input connects the outfan of given input circuit；Another input of multiplier connects Schmitt trigger
Outfan.The given input of fuzzy controller connects the outfan of multiplier, and the error input of fuzzy controller connects
The outfan of given input circuit；The controlled quentity controlled variable outfan of fuzzy controller is connected with an input of switching switch.PID controls
The error input of device connects the outfan of multiplier, and the parameter of the parameter input connection mode fuzzy controllers of PID controller is defeated
Go out end；The controlled quentity controlled variable outfan of PID controller is connected with another input of switching switch.The outfan connection of switching switch is driven
Galvanic electricity road.
In said apparatus, described given input circuit is that entity gives input circuit, touch screen gives input circuit and/or nothing
Line communication input circuit.
Compared with prior art, this utility model has a characteristic that
1, known fuzzy controller and known PID controller are combined be applied to medicinal liquid drip speed control technology in,
Achieve and with relatively high-accuracy, medicinal liquid during venous transfusion is dripped speed and carry out fast automatic detecting.Pass through fuzzy controller simultaneously
Dynamically adjust pid control parameter, solve the nonlinear problem in traditional drugs drop speed control system and feedback element postpones
Problem, it is achieved that medicinal liquid is dripped quick, the stability contorting of speed.
2, use photoelectric sensor to realize dripping speed detection, make drop detection more stable.
3, provide a brand-new man-machine interaction passage, utilize color LCD screen can increase the close friend of man machine interface
Property, it is provided that for the alphanumeric keypad of parameter input so that equipment is easy of use and promotes.
Accompanying drawing explanation
Fig. 1 is the structural representation that a kind of intravenous medicinal liquid drips velocity control device.
Fig. 2 is the operation principle schematic diagram that a kind of intravenous medicinal liquid drips velocity control device.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, this utility model is described in further detail, but enforcement of the present utility model
Mode is not limited to this.
A kind of intravenous medicinal liquid drips velocity control device, as it is shown in figure 1, by control unit, performance element and feedback
Unit's composition.
Above-mentioned control unit includes given input circuit and controller module.The outfan of given input circuit connects control
The given input of device module.In this utility model, described given input circuit can give input circuit with entity, i.e. passes through
Physical button circuit keys in Setting signal；Can be that touch screen gives input circuit, i.e. by touching display screen key entry Setting signal；
Can also be radio communication input circuit, i.e. receive the outside Setting signal sent by wireless module.
Above-mentioned performance element includes drive circuit, motor and drive mechanism.The control output end of controller module is even
Connecing the input of drive circuit, the outfan of drive circuit is connected with the input of motor, and the outfan of motor is even
Connecing the input of drive mechanism, the outfan of drive mechanism connects controlled device i.e. medicinal liquid folder.In this utility model, described control
Device module processed includes that multiplier, fuzzy controller, PID controller and switching switch are constituted.Multiplier one input connects given
The outfan of input circuit.Another input of multiplier connects the outfan of Schmitt trigger.Giving of fuzzy controller
Input connects the outfan of multiplier, and the error input of fuzzy controller connects the outfan of given input circuit.Fuzzy
The controlled quentity controlled variable outfan of controller is connected with an input of switching switch.The error input of PID controller connects multiplier
Outfan, the parameter output of the parameter input connection mode fuzzy controllers of PID controller.The controlled quentity controlled variable of PID controller is defeated
Go out end to be connected with another input of switching switch.The outfan of switching switch connects drive circuit.
Above-mentioned feedback unit includes photoelectric sensor and Schmitt trigger.Photoelectric sensor, just to transfusion drip tube, is responsible for
Drop is detected.The outfan of photoelectric sensor connects the input of Schmitt trigger, Schmitt trigger be responsible for by
Analogue signal is converted into digital signal, and the outfan of Schmitt trigger connects the feedback input end of controller module.
The work process of said apparatus is as follows: instruct generation medicinal liquid first by person according to the working interface in display device
Drip the given medicinal liquid of speed and drip speed value；Then control unit drips the error amount between speed signal according to given speed and current feedback, presses
Producing control instruction according to control algolithm, control algolithm processes electric machine rotation step-length and medicinal liquid in performance element simultaneously and drips between speed
Delay issue in nonlinear problem and feedback unit；Then the motor of performance element tighten up according to control instruction or
Person loosens medicinal liquid plastic tube；The current speed signal that drips is measured and is fed back to controller by feedback unit again simultaneously, with
Just sending of control instruction next time is carried out.When being controlled, drip the speed size of value with given medicinal liquid and medicinal liquid drips speed mistake
The size of difference is as the input of fuzzy controller, and motor stepping Angle ambiguity amount u and PID dynamic parameter are as output.Mould
The PID controlled quentity controlled variable that the fuzzy control quantity of fuzzy controllers output and PID controller export is selected by a switching switch.When
Medicinal liquid drip speed error amount absolute value | e | more than or equal to switching threshold values time switch to fuzzy control, when medicinal liquid drip speed error amount absolute
PID control is switched to, to ensure systematic steady state precision when value | e | is less than switching threshold values.See Fig. 2.
Above-described embodiment is this utility model preferably embodiment, but embodiment of the present utility model is not by above-mentioned
The restriction of embodiment, other any without departing from the change made under spirit of the present utility model and principle, modify, replace
In generation, combine, simplify, all should be the substitute mode of equivalence, within being included in protection domain of the present utility model.
Claims (2)
1. an intravenous medicinal liquid drips velocity control device, it is characterised in that: by control unit, performance element and feedback unit
Composition；Above-mentioned control unit includes given input circuit and controller module；Above-mentioned performance element includes drive circuit, stepping electricity
Machine and drive mechanism；Above-mentioned feedback unit includes photoelectric sensor and Schmitt trigger；
The outfan of given input circuit connects the given input of controller module；
The control output end of controller module connects the input of drive circuit, and the outfan of drive circuit is defeated with motor
Entering end to be connected, the outfan of motor connects the input of drive mechanism, and the outfan of drive mechanism connects controlled device i.e.
Medicinal liquid presss from both sides；
Photoelectric sensor is just to transfusion drip tube, and the outfan of photoelectric sensor connects the input of Schmitt trigger, Schmitt
The outfan of trigger connects the feedback input end of controller module；
Described controller module includes that multiplier, fuzzy controller, PID controller and switching switch are constituted；Multiplier one inputs
End connects the outfan of given input circuit；Another input of multiplier connects the outfan of Schmitt trigger；
The given input of fuzzy controller connects the outfan of multiplier, and the error input of fuzzy controller connects given defeated
Enter the outfan of circuit；The controlled quentity controlled variable outfan of fuzzy controller is connected with an input of switching switch；
The error input of PID controller connects the outfan of multiplier, and the parameter input of PID controller connects fuzzy control
The parameter output of device；The controlled quentity controlled variable outfan of PID controller is connected with another input of switching switch；
The outfan of switching switch connects drive circuit.
The intravenous medicinal liquid of one the most according to claim 1 drips velocity control device, it is characterised in that: described given defeated
Entering circuit is that entity gives input circuit, touch screen gives input circuit and/or radio communication input circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620302066.0U CN205796165U (en) | 2016-04-12 | 2016-04-12 | A kind of intravenous medicinal liquid drips velocity control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620302066.0U CN205796165U (en) | 2016-04-12 | 2016-04-12 | A kind of intravenous medicinal liquid drips velocity control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205796165U true CN205796165U (en) | 2016-12-14 |
Family
ID=58144812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620302066.0U Expired - Fee Related CN205796165U (en) | 2016-04-12 | 2016-04-12 | A kind of intravenous medicinal liquid drips velocity control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205796165U (en) |
-
2016
- 2016-04-12 CN CN201620302066.0U patent/CN205796165U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161214 Termination date: 20200412 |
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| CF01 | Termination of patent right due to non-payment of annual fee |