Summary of the invention
The object of the invention is in order to solve above-mentioned problems of the prior art, the control system of infusion pump has been proposed, be provided with detection module and identification control module, detect the dropping liquid action of dripping kettle in infusion pump pipeline by identification module, then by identification control module, the dropping liquid action detecting is processed and drawn a speed, and contrast with the speed of dripping of setting, draw both errors, point out and report to the police or adjust the speed of dripping of dripping kettle according to drawn error.
The control method that the invention allows for infusion pump, key step comprises:
RF transmitter sends pulse duration frequency signal, and dropping liquid action causes pulse duration frequency signal to be interrupted, and by infrared receiver received pulse frequency signal, detection input module is processed into the pulse duration frequency signal receiving switching square wave the output of low and high level;
Enumerator is processed switching square wave, dropping liquid action is added up, and draw the current speed of dripping, and current speed is sent into and dripped fast comparator;
Drip fast comparator current speed and setting value compared, current speed draw current speed and set value between error amount, revolution controller according to error amount to motorrevolutionadjust, central processing unit, according to error amount, is controlled player and display prompts and is run pin and a transfusion sky.
The present invention, by detecting the speed of dripping of dropping liquid, does not need to carry out pressure stepping, just can run pin identification, and can just can judge accurately and run needle-like state at force value ± 1KP of 18KP, and carries out only liquid protection.Avoid existing infusion pump need to manually determine whether to run the drawback of pin.
Detailed description of the invention
Below in conjunction with drawings and Examples, invention is described in detail.Should be appreciated that the only technical scheme in order to explain that the present invention proposes of the explanation of specific embodiment, and non-limiting the present invention.
As shown in Figure 1, the control system of infusion pump proposed by the invention, be provided with detection module and identification control module, detect the dropping liquid action of dripping kettle in infusion pump pipeline by identification module, then by identification control module, the dropping liquid action detecting is processed and drawn a speed, and contrast with the speed of dripping of setting, draw both errors, point out and report to the police or adjust the speed of dripping of dripping kettle according to drawn error.
In the present embodiment, detection module comprises the dropping liquid induction apparatus being made up of RF transmitter and infrared receiver and detects input module, detect input module and produce pulse duration frequency signal, output after RF transmitter modulation, dropping liquid action can cause the terminal of pulse duration frequency signal, infrared receiver receives this pulse duration frequency signal, by detecting input module, the pulse duration frequency signal receiving is processed into the switching square wave of low and high level and exports.
The identification control module of the present embodiment comprises central processing unit, by enumerator, a fast comparator, revolution controller, player and the display of central processing unit control.Enumerator adds up dropping liquid action, according to the model of predefined kettle, the data such as capacity, dropping liquid action is added up and is processed into and drip speed, dripping fast comparator compares the current speed of dripping drawing after processing with the speed of dripping of setting, draw both errors, revolution controller is according to this error, send corresponding instruction to motor module, motor module receives corresponding instruction, rotating speed to motor is adjusted, flow control valve and motor interlock arrange, be positioned on the pipeline that drips kettle below, current signal that can actuating motor module, flow to pipeline is controlled.When dripping the error that draws of fast comparator while exceeding the error of setting, central processing unit can be pointed out warning by player and display.
Further, a parameter can also be set module is set, can drip speed, capacity and drip the model of kettle according to practical situation setting.
The control method of infusion pump proposed by the invention, main process is:
RF transmitter sends pulse duration frequency signal, and dropping liquid action causes pulse duration frequency signal to be interrupted, and by infrared receiver received pulse frequency signal, detection input module is processed into the pulse duration frequency signal receiving switching square wave the output of low and high level;
Enumerator is processed switching square wave, dropping liquid action is added up, and draw the current speed of dripping, and current speed is sent into and dripped fast comparator;
Dripping fast comparator compares current speed and setting value, current speed draws the error amount between current speed and setting value, revolution controller is adjusted the rotating speed of motor according to error amount, central processing unit, according to error amount, is controlled player and display prompts and is run pin and a transfusion sky.
When use, be stuck in dripping in kettle on infusion pump pipeline, and make the pipeline that drips kettle lower end by flow control valve by dripping fast induction apparatus, flow control valve can be adjusted to the predetermined fast gap of dripping automatically according to parameters.
The dropping liquid being detected by drop induction apparatus moves, after detecting input module processing shaping, form the switching square wave of low and high level, send into enumerator, enumerator is processed switching square wave, and cumulative dropping liquid action, draw to drip speed and send into and drip fast comparator, drip fast comparator the fast information comparison that fast sum counter is sent into of dripping of user setting, the task of dripping fast comparator is exactly to calculate the fast and current fast error amount of dripping of setting, when be greater than ± 10 ℅ of error amount, can send instruction to revolution controller, make motor module drive stepping motor adjust action, when error amount is negative, can reduce the gap of flow control valve, making to drip speed slows down, error amount is the gap of timing meeting augmented flow control valve, making to drip speed accelerates.
When error amount is less than or equal to-20% of setting value, and have the decay of continuous 6 times, central processing unit sends instruction to player and display, and player and display prompts are run pin.When error amount is less than or equal to-20% of setting value, and dropping liquid signal exceedes 10 seconds in the duration of decay continuously, and central processing unit sends instruction to player and display, and player and display prompts are run pin.Do not receive dropping liquid signal when enumerator exceedes certain time length, central processing unit sends instruction to player and display, and player and display prompts transfusion are dripped empty.When the rotating speed of revolution controller control step motor reaches certain rotating speed, central processing unit sends instruction to player and display, and player and display prompts transfusion are dripped empty.
The concrete value of above-mentioned error amount is to get according to repetition test repeatedly, is to realize optimum referential data of the present invention, and according to system structure of the present invention and method, in the time that range of error is limited, other numerical value of employing also should belong to protection scope of the present invention.