CN102125709B - Method for controlling dropping speed of liquid drops of automatic infusion pump - Google Patents
Method for controlling dropping speed of liquid drops of automatic infusion pump Download PDFInfo
- Publication number
- CN102125709B CN102125709B CN 201110095978 CN201110095978A CN102125709B CN 102125709 B CN102125709 B CN 102125709B CN 201110095978 CN201110095978 CN 201110095978 CN 201110095978 A CN201110095978 A CN 201110095978A CN 102125709 B CN102125709 B CN 102125709B
- Authority
- CN
- China
- Prior art keywords
- drop
- control unit
- speed
- steps
- difference
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention relates to the technical field of automatic control of medicinal infusion pumps, in particular to a method and device for controlling the dropping speed of liquid drops of an automatic infusion pump. By a method for detecting the pulse widths of all pulses and abandoning processing low-width pulses, non-uniformly distributed high-level pulse noise waves mixed in low-level pulse signals for indicating the dropping of the liquid drops can be thoroughly filtered, so the dropping speed sampling precision of the liquid drops is improved; the value of the dropping speed of the liquid drop of each time and the measured dropping speed values of the liquid drops of front several times are averaged to obtain an average value, and the difference of the average value and a preset value is used as the basis for feeding back dropping speed adjustment; when the dropping speed of the liquid drop of a certain time is suddenly abnormal, a feedback system performs smooth small amplitude adjustment, and the adjustment process of the system is more stable; and the working current of a power device for pressing an infusion hose is monitored in real time, and alarm information is immediately sent when a motor of the power device is stuck during operating, so the safety of the infusion process is increased.
Description
Technical field
The present invention relates to infusion pump in medical application automatic control technology field, relate in particular to a kind of control automatic infusion
Drop drips the method for speed.
Background technology
Drip fast automatic control technology field at existing drop, drop is dripped the detection of speed, in the Murphy's dropper both sides luminous tube and photoelectric receiving tube to be set, out-of-date when there being drop to drip, the optical signal that photoelectric receiving tube receives dies down, at this moment, the output electrical signals of photoelectric receiving tube is through differentiation and the adjustment of high-low level, will obtain representing drop through the low level pulse in this Photoelectric Detection interval, according to the width of this low level pulse, just can draw the speed of dripping of drop.In the prior art scheme, photoelectric receiving tube is in drop drippage process, the signal of its output can contain clutter to the refraction of light path because of drop, this output signal is in the process that the filtering of its rear class, high-low level are differentiated, its clutter that contains is differentiated part for high level and is mixed in the low level pulse signal that the expression drop dripped, so that processing unit is not high to the processing accuracy that drop drips speed.
The weak point of this part of prior art, existing publication number is that the patent of CN1359732A makes improvements, its improved plan is: to the high level clutter that is mixed with in the low level pulse signal that dripped of expression drop, when the trailing edge of expression drop drippage arrives, open simultaneously an internal delay time device, within the time that chronotron is set, close external interrupt with shielding high level clutter, this scheme can solve a part of problem, but for the low level pulse signal that represents that drop dripped, the high level pulse skewness that it mixes, and the low level pulse signal that the expression drop dripped its pulsewidth in dripping the whole process of velocity modulation is dynamic change, and whether the chronotron setting-up time of this scheme is correspondingly dynamically adjusted, not open corresponding explanation of this patent just limited the scope of its application.
Publication number be the patent of CN1359732A announced its feedback adjusting of dripping speed for drop be according to current drop drip speed value and set value between difference make, when this kind method of adjustment is dripped drop at every turn, system all can adjust dripping speed next time, when a certain the drop in burst ground drips speed when unusual, feedback system just has larger adjusting range, thereby being dripped speed, later drop produces adverse influence, so that the adjustment process of system is unstable.
In addition, in the existing technical scheme, be to realize by the power set that can oppress infusion tube are set for the control of infusion liquid drop speed, if the motor of these power set is stuck in running, also can produce large harm to infusion process.
Summary of the invention
For the deficiency of prior art scheme, the present invention proposes a kind of method that the automatic infusion pump drop drips speed of controlling.
The technical solution used in the present invention is as follows:
A kind of automatic infusion pump drop of controlling drips fast method, and comprising: steps A, drop are dripped the step of speed sampling, and step B, drop drip the step that speed is processed;
Steps A 1: the luminous tube emission sensed light signal of drop detection circuit, then photoelectric receiving tube receives and compares output detection signal, and the sampling time memory block of removing control unit also disposes an intervalometer;
Steps A 2: at control unit, the output detection signal of configuration photoelectric receiving tube is that trailing edge triggers interruption, and when the trailing edge triggering was interrupted producing, the temporal information that reads this intervalometer was the sampling time, enters steps A 3;
Steps A 3: control unit carries out difference relatively according to the sampling time of reading in the steps A 2 and sampling time t2, if this difference is judged time threshold △ T1 less than the first clutter, then turn back in the steps A 2, continue to wait for that trailing edge triggers interrupt event and produces, if this difference is judged time threshold △ T1, then treatment step A4 greater than the first clutter;
Steps A 4: at control unit, the output detection signal of configuration photoelectric receiving tube is that rising edge triggers interruption, the sampling time t1 among the recording step A2, and when rising edge interrupted producing, the temporal information that reads this intervalometer was the sampling time, enters steps A 5;
Steps A 5: control unit carries out difference relatively according to the sampling time of reading in the steps A 4 and sampling time t1, if this difference is judged time threshold △ T1 less than the first clutter, then turn back in the steps A 4, continue to wait for that rising edge triggers generation break period, if this difference is judged time threshold △ T1, then treatment step A6 greater than the first clutter;
Steps A 6: the sampling time t2 among the control unit recording step A5 enters steps A 7;
Steps A 7: the difference of control unit calculating sampling time t2 and sampling time t1 if this difference is judged time threshold △ T2 less than the second clutter, then turns back in the steps A 2, if this difference is judged time threshold △ T2, then treatment step A8 greater than the second clutter;
Steps A 8: control unit calculates the difference of current sampling time t1 and last sampling time t1, if this difference is judged time threshold △ T3 less than the 3rd clutter, then turn back in the steps A 2, if this difference is judged time threshold △ T3 greater than the 3rd clutter, then record this time difference, then treatment step A9;
Steps A 9: control unit also calculates drop according to this difference and drips speed value, finishes drop and drips the flow process that speed is sampled;
Described step B comprises:
Step B1: the drop that control unit is finished according to steps A drips speed sampling flow process, drop in the steps A is dripped the speed value be inserted in the tail of the queue that drips fast storage queue, and repeat this process until have at least three groups of drops in described fast storage queue when dripping the speed value, then enter step B2;
Step B2: drop drips speed value to control unit according to dripping in the fast storage queue this moment, and calculating that this group drop drips the meansigma methods of speed value and record it is a fast meansigma methods L1; When another drop drips after speed sampling flow process finishes, the drop of this time flow process generation is dripped the tail of the queue of described fast storage queue of speed value insertion, and according to this moment in the fast storage queue, drop dripped the speed value, calculate this group drop and drip the meansigma methods of speed value and record it for dripping fast meansigma methods L2, enter step B3;
Step B3: control unit calculates the difference of dripping fast meansigma methods L2 and dripping fast meansigma methods L1, if this difference is greater than the fast stable threshold △ L that drips that sets, then recording drop, to drip fast state be unstable, and the drop of wait that turns back among the step B2 drips the handling process that speed sampling flow process is finished, if this difference is less than dripping fast stable threshold △ L, then record drop and drip fast state for after stable, enter step B4;
Step B4: control unit drips the difference of speed value SL and current fast meansigma methods L2 according to predefined drop, adjust steering engine actuator in the mode of feedback and change a speed, and turn back to drop of wait among the step B2 and drip the handling process that speed sampling flow process is finished, until this difference levels off to 0.
Further, the described mode with feedback of step B4 is adjusted steering engine actuator and is changed the processing of dripping speed, may further comprise the steps:
Step B41: at control unit, configuration-system clock SysTick is timer clock, and set the every 1ms of this timer clock and produce once and interrupt, disposing an output port is ratio servo driving control port, disposing an AD input port is ratio steering wheel current sample port, disposes steering wheel enumerator cycle time;
Step B42: steering wheel enumerator cycle time adds 1 according to its count value of the every 1ms of timer clock, until count value is 20 o'clock, this counter O reset and according to the difference of current fast meansigma methods described in the step B5, the corner that draws the ratio steering wheel in the mode of tabling look-up is adjusted interval, adjust the high level pulse of a 0-2ms of interval control ratio servo driving control port output according to this corner, the corner of resize ratio steering wheel, and repeat the processing of this step B42 always.
Further, after described step B41, also comprise the stuck step B42 ' of processing ratio steering gear electric-machine:
Step B421 ': control unit carries out the AD sampling by the steering wheel current sampling circuit to this voltage signal, enters step B422 ';
The every generation of the timer clock of step B422 ': step B41 is once interrupted, control unit reads the sampled value in the AD depositor one time, and this sampled value is inserted the tail of the queue of current value storage queue, until during this queue full element, control unit calculates the meansigma methods of a group element in the formation after this time upgraded, draw the current current value of ratio steering wheel, if judge that this current value is less than the threshold value of ratio steering wheel running current, the then processing of repeating step B42 ', if this current value, then sends the alarm of the stuck or short circuit of motor immediately greater than the threshold value of ratio steering wheel running current.
Further, described the first clutter is judged time threshold △ T1, and its duration is 100 μ s.
Further, described the second clutter is judged time threshold △ T2, and its duration is 200 μ s.
Further, described drop detection circuit comprises: the luminous tube and a photoelectric receiving tube and the detection signal treatment circuit that are arranged on the symmetrical both sides of Murphy's dropper, this detection signal treatment circuit is connected between described photoelectric receiving tube and the control unit, described control unit connects and to drive described luminous tube luminous, described detection signal treatment circuit is to be made of bandwidth-limited circuit and level shifting circuit series connection successively, the input of this bandwidth-limited circuit is connected to the signal output part of photoelectric receiving tube, the input of described level shifting circuit has a level match potentiometer, in order to regulate the level from the bandwidth-limited circuit output signal, realize level match, the outfan of this level shifting circuit is connected to the drop sampled signal input of control unit.
Further, described control unit connects and to drive described luminous tube luminous, and this control unit is that the impulse wave that the form with PWM sends a fixed frequency comes the driven for emitting lights pipe periodically luminous.
Further, the sample resistance of the test side of described steering wheel current sampling circuit is serially connected on the current supply circuit of ratio steering wheel, the AD input port of the described control unit of its output termination.
Further, described steering wheel current sampling circuit is to be made of resistance sampling circuit, voltage filter and follow circuit, filter amplification circuit and level shifting circuit series connection successively, and the output level of described level shifting circuit connects the AD input port of control unit.
Further, described steering engine actuator changes the implementation of dripping speed: steering engine actuator comprises: a baffle plate, an infusion tube holddown groove, an eccentric, a ratio steering wheel, the control port of the described control unit of signal termination of ratio steering wheel, infusion tube is arranged in the infusion tube holddown groove, the pulse width that control unit sends is to the adjustment that moves back and forth of the corner of this ratio steering wheel, and force the position change of eccentric tangent plane and baffle plate, thereby compress and unclamp the infusion tube that is positioned at holddown groove.
The present invention is by adopting technique scheme, and the beneficial effect that has is:
1. the pulsewidth by detecting all pulses and abandoning method that low width pulse is processed, high level pulse clutter for the uneven distribution that mixes among the low level pulse signal that dripped of expression drop, can with its thorough filtering, improve drop and drip the precision that speed is sampled;
2. the value by each drop being dripped speed and the drop that records several times of front drip the speed value and average, the difference of this meansigma methods and preset value is dripped the whole basis of velocity modulation as feedback, when a certain the drop in burst ground drips speed when unusual, feedback system is mild by a small margin adjustment, and the adjustment process of system is more stable.
3. pass through the operating current Real Time Monitoring to the power set of compressing infusion tube, when the motor of these power set is stuck in running, then send a warning immediately, increased the safety of infusion process.
Description of drawings
Fig. 1 is that drop of the present invention drips speed sampling schematic flow sheet.
Fig. 2 is that drop of the present invention drips fast handling process sketch map.
Fig. 3 is the overall structure block diagram of one embodiment of the present invention.
Fig. 4 is the schematic diagram of detection signal treatment circuit one embodiment of the present invention.
Fig. 5 is the schematic diagram of steering wheel current sampling circuit one embodiment of the present invention.
The specific embodiment
Now the present invention is further described with the specific embodiment by reference to the accompanying drawings.
A kind of automatic infusion pump drop of controlling drips fast method, and comprising: steps A, drop are dripped the step of speed sampling, and step B, drop drip the step that speed is processed.
Wherein, the flow chart that the described drop of steps A drips fast sampling step as shown in Figure 1, it comprises:
Steps A 1: the luminous tube emission sensed light signal of drop detection circuit, then photoelectric receiving tube receives and compares output detection signal, and the sampling time memory block of removing control unit also disposes an intervalometer;
Steps A 2: at control unit, the output detection signal of configuration photoelectric receiving tube is that trailing edge triggers interruption, and when the trailing edge triggering was interrupted producing, the temporal information that reads this intervalometer was the sampling time, enters steps A 3;
Steps A 3: control unit carries out difference relatively according to the sampling time of reading in the steps A 2 and sampling time t2, if this difference is judged time threshold △ T1 less than the first clutter, then turn back in the steps A 2, continue to wait for that trailing edge triggers interrupt event and produces, if this difference is judged time threshold △ T1, then treatment step A4 greater than the first clutter;
Steps A 4: at control unit, the output detection signal of configuration photoelectric receiving tube is that rising edge triggers interruption, the sampling time t1 described in the recording step A2, and when rising edge interrupted producing, the temporal information that reads this intervalometer was the sampling time, enters steps A 5;
Steps A 5: control unit carries out difference relatively according to the sampling time of reading in the steps A 4 and sampling time t1, if this difference is judged time threshold △ T1 less than the first clutter, then turn back in the steps A 4, continue to wait for that rising edge triggers generation break period, if this difference is judged time threshold △ T1, then treatment step A6 greater than the first clutter;
Steps A 6: the sampling time t2 described in the control unit recording step A5 enters steps A 7;
Steps A 7: the difference of control unit calculating sampling time t2 and sampling time t1 if this difference is judged time threshold △ T2 less than the second clutter, then turns back in the steps A 2, if this difference is judged time threshold △ T2, then treatment step A8 greater than the second clutter;
Steps A 8: control unit calculates the difference of current sampling time t1 and last sampling time t1, if this difference is judged time threshold △ T3 less than the 3rd clutter, then turn back in the steps A 2, if this difference is judged time threshold △ T3 greater than the 3rd clutter, then record this time difference, then treatment step A9;
Steps A 9: control unit also calculates drop according to this difference and drips speed value, finishes drop and drips the flow process that speed is sampled;
In this steps A, high level pulse clutter for the uneven distribution that mixes among the low level pulse signal that dripped of expression drop, even the number of this high level pulse clutter is more than two, when first impulsive noise signal occurs, in steps A 4, can record the time value of its appearance according to its rising edge, when this first impulsive noise signal disappears, in steps A 2, can record the time value of its disappearance according to its trailing edge, the difference of the time value that this first impulsive noise signal must occur and the time value of disappearance, just can represent its pulse width, judge that in described steps A 3 this difference is less than the first clutter judgement time threshold △ T1, disturbing pulse with regard to the pulse of judging this first impulsive noise signal, abandon it is processed, then the rising edge of waiting for the low level pulse signal that next high level pulse clutter or expression drop dripped arrives, even and the low level pulse width of the low level pulse signal that the expression drop dripped is judged time threshold △ T1 greater than the first clutter, as long as it judges time threshold △ T2 less than the second clutter, just can judge that this low level pulse also is disturbing pulse, still abandons it is processed.Like this, just can judge successively all impulsive noise signals and one by one filtering, and the trailing edge at the low level pulse signal end that real detectable expression drop dripped is when arriving, judge that in described steps A 9 difference is greater than the 3rd clutter judgement time threshold △ T3, read the time value t1 of its arrival, the difference of the time value of record in this time value and the steps A 4 just can calculate drop according to this difference and drip the speed value.
Wherein, the flow chart that the described drop of step B drips fast treatment step as shown in Figure 2, it comprises:
Step B1: the drop that control unit is finished according to steps A drips speed sampling flow process, drop in the steps A is dripped the speed value be inserted in the tail of the queue that drips fast storage queue, and repeat this process until have at least three groups of drops in described fast storage queue when dripping the speed value, then enter step B2;
Step B2: drop drips speed value to control unit according to dripping in the fast storage queue this moment, and calculating that this group drop drips the meansigma methods of speed value and record it is a fast meansigma methods L1; When another drop drips after speed sampling flow process finishes, the drop of this time flow process generation is dripped the tail of the queue of described fast storage queue of speed value insertion, and according to this moment in the fast storage queue, drop dripped the speed value, calculate this group drop and drip the meansigma methods of speed value and record it for dripping fast meansigma methods L2, enter step B3;
Step B3: control unit calculates the difference of dripping fast meansigma methods L2 and dripping fast meansigma methods L1, if this difference is greater than the fast stable threshold △ L that drips that sets, then recording drop, to drip fast state be unstable, and the drop of wait that turns back among the step B2 drips the handling process that speed sampling flow process is finished, if this difference is less than dripping fast stable threshold △ L, then record drop and drip fast state for after stable, enter step B4;
Step B4: control unit drips the difference of speed value SL and current fast meansigma methods L2 according to predefined drop, adjust steering engine actuator in the mode of feedback and change a speed, and turn back to drop of wait among the step B2 and drip the handling process that speed sampling flow process is finished, until this difference levels off to 0;
In this step B, each drop is dripped the value of speed and the drop that records several times of front drip the speed value and average by step B2 is described, and the described difference with the meansigma methods among the step B2 and a preset value of step B4 is dripped the whole basis of velocity modulation as feedback, when a certain the drop in burst ground drips speed when unusual, it is unsettled processing method that control unit drips fast state according to the described record drop of step B3 first, judge that drop drips speed for just further doing to adjust by a small margin to dripping speed according to the described judged result of step B4 after stable, and drop generally speaking drips speed, the among a small circle error of its existence does not then belong to the whole scope of velocity modulation of dripping, and to drip fast adjustment process more stable for drop like this.
As one preferred embodiment, the described mode with feedback of step B4 is adjusted steering engine actuator and is changed a processing of dripping speed, may further comprise the steps:
Step B41: at control unit, configuration-system clock SysTick is timer clock, and set the every 1ms of this timer clock and produce once and interrupt, disposing an output port is ratio servo driving control port, disposing an AD input port is ratio steering wheel current sample port, disposes steering wheel enumerator cycle time;
Step B42: steering wheel enumerator cycle time adds 1 according to its count value of the every 1ms of timer clock, until count value is 20 o'clock, this counter O reset and according to the difference of current fast meansigma methods described in the step B5, the corner that draws the ratio steering wheel in the mode of tabling look-up is adjusted interval, adjust the high level pulse of a 0-2ms of interval control ratio servo driving control port output according to this corner, the corner of resize ratio steering wheel, and repeat the processing of this step B42 always.
As the present invention one preferred embodiment, after described step B41, also comprise further: process the stuck step B42 ' of ratio steering gear electric-machine, its scheme is to be made of following step B421 ' and step B422 ':
Step B421 ': control unit carries out the AD sampling by the steering wheel current sampling circuit to this voltage signal, enters step B422 ';
The every generation of the timer clock of step B422 ': step B41 is once interrupted, control unit reads the sampled value in the AD depositor one time, and this sampled value is inserted the tail of the queue of current value storage queue, until during this queue full element, control unit calculates the meansigma methods of a group element in the formation after this time upgraded, draw the current current value of ratio steering wheel, if judge that this current value is less than the threshold value of ratio steering wheel running current, the then processing of repeating step B42 ', if this current value, then sends the alarm of the stuck or short circuit of motor immediately greater than the threshold value of ratio steering wheel running current.
Preferably, described the first clutter is judged time threshold △ T1, and its duration is 100 μ s.
Preferably, described the second clutter is judged time threshold △ T2, and its duration is 200 μ s.
Above clutter judgement time threshold can be changed according to practical situation, and above-mentioned numerical value is the preferred parameter in the practical application.
Shown in accompanying drawing 3 and accompanying drawing 4, one preferred embodiment of drop detection circuit of the present invention is as follows: drop detection circuit 1 comprises: the luminous tube 101 and a photoelectric receiving tube 102 and the detection signal treatment circuit 103 that are arranged on the symmetrical both sides of Murphy's dropper, this detection signal treatment circuit 1 is connected between described photoelectric receiving tube 102 and the control unit 2, and described control unit 2 connects and to drive described luminous tube 101 luminous.Described detection signal treatment circuit 103 is to be made of bandwidth-limited circuit 103A and level shifting circuit 103B series connection successively, the input of this bandwidth-limited circuit 103A is connected to the signal output part of photoelectric receiving tube 102, its passband frequency range is that the pulse frequency of dripping with the expression drop is suitable, like this, elementary interference noise that just can a filtering part at Check processing has improved the reliability that detects.The input of described level shifting circuit 103B has a level match potentiometer, in order to regulate the level from the bandwidth-limited circuit output signal, realize level match, the outfan of this level shifting circuit 103B is connected to the drop sampled signal input of control unit 2.
The above preferred embodiment of drop detection circuit of the present invention, further, described control unit connects and to drive described luminous tube luminous, this control unit is that the impulse wave that the form with PWM sends a fixed frequency comes the driven for emitting lights pipe periodically luminous, can effectively reduce like this external environment condition to the interference of detection signal.
Shown in accompanying drawing 3 and accompanying drawing 5, the sample resistance of the test side of steering wheel current sampling circuit 4 of the present invention is serially connected on the current supply circuit of ratio steering wheel, the AD input port of the described control unit of its output termination.
Shown in accompanying drawing 5, one preferred embodiment of steering wheel current sampling circuit 4 of the present invention, it is to be made of resistance sampling circuit 401, voltage filter and follow circuit 402, filter amplification circuit 403 and level shifting circuit 404 series connection successively, and the output level of described level shifting circuit connects the AD input port of control unit.
Steering engine actuator of the present invention changes the implementation of dripping speed, may be implemented in a variety of ways, as changing tube for transfusion tube wall size, changing medicine bottle height etc.An one preferred embodiment is with reference to shown in the accompanying drawing 3: steering engine actuator 3 comprises: a baffle plate 301, an infusion tube holddown groove 302, an eccentric 303, a ratio steering wheel 304, the control port of the described control unit 2 of signal termination of ratio steering wheel 304, infusion tube is arranged in the infusion tube holddown groove 302, the pulse width that control unit 2 sends is to the adjustment that moves back and forth of the corner of this ratio steering wheel 304, and force the tangent plane of eccentric 303 and the position change of baffle plate 301, thereby compress and unclamp the infusion tube that is positioned at holddown groove 302.
Although specifically show and introduced the present invention in conjunction with preferred embodiment; but the those skilled in the art should be understood that; within not breaking away from the spirit and scope of the present invention that appended claims limits; can make a variety of changes the present invention in the form and details, be protection scope of the present invention.
Claims (10)
1. control the method that the automatic infusion pump drop drips speed for one kind, comprising: steps A, drop are dripped the step of speed sampling, and step B, drop drip the step that speed is processed; It is characterized in that: described steps A comprises:
Steps A 1: the luminous tube emission sensed light signal of drop detection circuit, then photoelectric receiving tube receives and compares output detection signal, and the sampling time memory block of removing control unit also disposes an intervalometer;
Steps A 2: at control unit, the output detection signal of configuration photoelectric receiving tube is that trailing edge triggers interruption, and when the trailing edge triggering was interrupted producing, the temporal information that reads this intervalometer was the sampling time, enters steps A 3;
Steps A 3: control unit carries out difference relatively according to the sampling time of reading in the steps A 2 and sampling time t2, if this difference is judged time threshold △ T1 less than the first clutter, then turn back in the steps A 2, continue to wait for that trailing edge triggers interrupt event and produces, if this difference is judged time threshold △ T1, then treatment step A4 greater than the first clutter;
Steps A 4: at control unit, the output detection signal of configuration photoelectric receiving tube is that rising edge triggers interruption, the sampling time t1 among the recording step A2, and when rising edge interrupted producing, the temporal information that reads this intervalometer was the sampling time, enters steps A 5;
Steps A 5: control unit carries out difference relatively according to the sampling time of reading in the steps A 4 and sampling time t1, if this difference is judged time threshold △ T1 less than the first clutter, then turn back in the steps A 4, continue to wait for that rising edge triggers generation break period, if this difference is judged time threshold △ T1, then treatment step A6 greater than the first clutter;
Steps A 6: the sampling time t2 among the control unit recording step A5 enters steps A 7;
Steps A 7: the difference of control unit calculating sampling time t2 and sampling time t1 if this difference is judged time threshold △ T2 less than the second clutter, then turns back in the steps A 2, if this difference is judged time threshold △ T2, then treatment step A8 greater than the second clutter;
Steps A 8: control unit calculates the difference of current sampling time t1 and last sampling time t1, if this difference is judged time threshold △ T3 less than the 3rd clutter, then turn back in the steps A 2, if this difference is judged time threshold △ T3 greater than the 3rd clutter, then record this time difference, then treatment step A9;
Steps A 9: control unit also calculates drop according to this difference and drips speed value, finishes drop and drips the flow process that speed is sampled;
Described step B comprises:
Step B1: the drop that control unit is finished according to steps A drips speed sampling flow process, drop in the steps A is dripped the speed value be inserted in the tail of the queue that drips fast storage queue, and repeat this process until have at least three groups of drops in described fast storage queue when dripping the speed value, then enter step B2;
Step B2: drop drips speed value to control unit according to dripping in the fast storage queue this moment, and calculating that this group drop drips the meansigma methods of speed value and record it is a fast meansigma methods L1; When another drop drips after speed sampling flow process finishes, the drop of this time flow process generation is dripped the tail of the queue of described fast storage queue of speed value insertion, and according to this moment in the fast storage queue, drop dripped the speed value, calculate this group drop and drip the meansigma methods of speed value and record it for dripping fast meansigma methods L2, enter step B3;
Step B3: control unit calculates the difference of dripping fast meansigma methods L2 and dripping fast meansigma methods L1, if this difference is greater than the fast stable threshold △ L that drips that sets, then recording drop, to drip fast state be unstable, and the drop of wait that turns back among the step B2 drips the handling process that speed sampling flow process is finished, if this difference is less than dripping fast stable threshold △ L, then record drop and drip fast state for after stable, enter step B4;
Step B4: control unit drips the difference of speed value SL and current fast meansigma methods L2 according to predefined drop, adjust steering engine actuator in the mode of feedback and change a speed, and turn back to drop of wait among the step B2 and drip the handling process that speed sampling flow process is finished, until this difference levels off to 0.
2. control automatic infusion pump drop as claimed in claim 1 drips the method for speed, it is characterized in that: the described mode with feedback of step B4 is adjusted steering engine actuator and is changed the processing of dripping speed, may further comprise the steps:
Step B41: at control unit, configuration-system clock SysTick is timer clock, and set the every 1ms of this timer clock and produce once and interrupt, disposing an output port is ratio servo driving control port, disposing an AD input port is ratio steering wheel current sample port, disposes steering wheel enumerator cycle time;
Step B42: steering wheel enumerator cycle time adds 1 according to its count value of the every 1ms of timer clock, until count value is 20 o'clock, this counter O reset and according to the difference of current fast meansigma methods described in the step B5, the corner that draws the ratio steering wheel in the mode of tabling look-up is adjusted interval, adjust the high level pulse of a 0-2ms of interval control ratio servo driving control port output according to this corner, the corner of resize ratio steering wheel, and repeat the processing of this step B42 always.
3. control automatic infusion pump drop as claimed in claim 2 drips the method for speed, it is characterized in that: after described step B41, also comprise the stuck step B42 ' of processing ratio steering gear electric-machine:
Step B421 ': control unit carries out the AD sampling by the steering wheel current sampling circuit to this voltage signal, enters step B422 ';
The every generation of the timer clock of step B422 ': step B41 is once interrupted, control unit reads the sampled value in the AD depositor one time, and this sampled value is inserted the tail of the queue of current value storage queue, until during this queue full element, control unit calculates the meansigma methods of a group element in the formation after this time upgraded, draw the current current value of ratio steering wheel, if judge that this current value is less than the threshold value of ratio steering wheel running current, the then processing of repeating step B42 ', if this current value, then sends the alarm of the stuck or short circuit of motor immediately greater than the threshold value of ratio steering wheel running current.
4. control automatic infusion pump drop as claimed in claim 1 drips the method for speed, it is characterized in that: described the first clutter is judged time threshold △ T1, and its duration is 100 μ s.
5. control automatic infusion pump drop as claimed in claim 1 drips the method for speed, it is characterized in that: described the second clutter is judged time threshold △ T2, and its duration is 200 μ s.
6. control automatic infusion pump drop as claimed in claim 1 drips the method for speed, it is characterized in that: described drop detection circuit comprises: the luminous tube and a photoelectric receiving tube and the detection signal treatment circuit that are arranged on the symmetrical both sides of Murphy's dropper, this detection signal treatment circuit is connected between described photoelectric receiving tube and the control unit, described control unit connects and to drive described luminous tube luminous, described detection signal treatment circuit is to be made of bandwidth-limited circuit and level shifting circuit series connection successively, the input of this bandwidth-limited circuit is connected to the signal output part of photoelectric receiving tube, the input of described level shifting circuit has a level match potentiometer, in order to regulate the level from the bandwidth-limited circuit output signal, realize level match, the outfan of this level shifting circuit is connected to the drop sampled signal input of control unit.
7. control automatic infusion pump drop as claimed in claim 6 drips the method for speed, it is characterized in that: described control unit connects and to drive described luminous tube luminous, and this control unit is that the impulse wave that the form with PWM sends a fixed frequency comes the driven for emitting lights pipe periodically luminous.
8. control automatic infusion pump drop as claimed in claim 3 drips the method for speed, it is characterized in that: the sample resistance of the test side of described steering wheel current sampling circuit is serially connected on the current supply circuit of ratio steering wheel, the AD input port of the described control unit of its output termination.
9. control automatic infusion pump drop as claimed in claim 8 drips the method for speed, it is characterized in that: described steering wheel current sampling circuit is to be made of resistance sampling circuit, voltage filter and follow circuit, filter amplification circuit and level shifting circuit series connection successively, and the output level of described level shifting circuit connects the AD input port of control unit.
10. control automatic infusion pump drop as claimed in claim 1 drips the method for speed, it is characterized in that: described steering engine actuator changes the implementation of dripping speed and is: steering engine actuator comprises: a baffle plate, one infusion tube holddown groove, one eccentric, one ratio steering wheel, the control port of the described control unit of signal termination of ratio steering wheel, infusion tube is arranged in the infusion tube holddown groove, the pulse width that control unit sends is to the adjustment that moves back and forth of the corner of this ratio steering wheel, and force the position change of eccentric tangent plane and baffle plate, thereby compress and unclamp the infusion tube that is positioned at holddown groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110095978 CN102125709B (en) | 2011-04-18 | 2011-04-18 | Method for controlling dropping speed of liquid drops of automatic infusion pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110095978 CN102125709B (en) | 2011-04-18 | 2011-04-18 | Method for controlling dropping speed of liquid drops of automatic infusion pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102125709A CN102125709A (en) | 2011-07-20 |
| CN102125709B true CN102125709B (en) | 2013-01-09 |
Family
ID=44264140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110095978 Expired - Fee Related CN102125709B (en) | 2011-04-18 | 2011-04-18 | Method for controlling dropping speed of liquid drops of automatic infusion pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102125709B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102716527B (en) * | 2012-06-28 | 2013-10-30 | 费森尤斯卡比健源（长沙）医疗科技有限公司 | Detection method for liquid drops of transfusion pump |
| CN103566437A (en) * | 2012-07-23 | 2014-02-12 | 苏州优点优唯医疗科技有限公司 | Infusion information collecting device |
| CN103239777B (en) * | 2013-05-03 | 2015-04-15 | 刘一 | Infusion speed detection method and infusion speed detection device |
| CN106693113A (en) * | 2016-12-22 | 2017-05-24 | 山东大学 | Transfusion monitoring alarm |
| CN106668985A (en) * | 2016-12-22 | 2017-05-17 | 山东大学 | Real-time monitoring system for transfusion |
| CN107715241B (en) * | 2017-11-16 | 2020-09-29 | 湖南工业大学 | Infusion dripping speed monitoring device |
| CN109260548B (en) * | 2018-11-02 | 2023-10-13 | 湖南长城医疗科技有限公司 | Infusion drop speed detection method, infusion control method and infusion detector |
| CN114681716B (en) * | 2022-03-25 | 2023-05-23 | 南通大学 | Intelligent monitoring transfusion device and use method thereof |
| CN116159209B (en) * | 2023-03-06 | 2023-10-24 | 江西省人民医院 | Drop measuring algorithm and drop detector structure of medical infusion apparatus |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4432761A (en) * | 1981-06-22 | 1984-02-21 | Abbott Laboratories | Volumetric drop detector |
| EP0361662A1 (en) * | 1988-08-15 | 1990-04-04 | Fresenius AG | Dual source parenteral infusion system with secondary infusion module |
| CN1359732A (en) * | 2000-12-20 | 2002-07-24 | 深圳市康哲药业有限公司 | Automatic control system for intravenous drip |
| CN1736499A (en) * | 2004-08-16 | 2006-02-22 | 金连河 | Medical automatic transfusion controller |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1250853B (en) * | 1991-11-05 | 1995-04-21 | Hospal Dasco Spa | FLOW DETECTOR. |
-
2011
- 2011-04-18 CN CN 201110095978 patent/CN102125709B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4432761A (en) * | 1981-06-22 | 1984-02-21 | Abbott Laboratories | Volumetric drop detector |
| EP0361662A1 (en) * | 1988-08-15 | 1990-04-04 | Fresenius AG | Dual source parenteral infusion system with secondary infusion module |
| CN1359732A (en) * | 2000-12-20 | 2002-07-24 | 深圳市康哲药业有限公司 | Automatic control system for intravenous drip |
| CN1736499A (en) * | 2004-08-16 | 2006-02-22 | 金连河 | Medical automatic transfusion controller |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102125709A (en) | 2011-07-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102125709B (en) | Method for controlling dropping speed of liquid drops of automatic infusion pump | |
| US5346466A (en) | Drop detection method and apparatus | |
| CN101189509B (en) | Method and device for monitoring a flow of liquid for the presence of air by means of ultrasound | |
| CN203385854U (en) | A semiconductor device and a sound distance measurement system | |
| CN103760414B (en) | Based on the low speed recurrence interval collection method of anti-interference low-pass filtering | |
| CN103795459B (en) | Optical module-based fault processing method, device and optical module | |
| CN106026978B (en) | PWM circuit duty ratio adjusting method and system of blood pressure measuring device | |
| CN101545916A (en) | Measurement circuit and measurement method for rotation speed of CW type electric eddy current dynamometer | |
| CN111103623B (en) | Water detection method of food processing machine | |
| CN201368918Y (en) | Infrared detector | |
| CN112378813B (en) | Device and method for measuring density of atmospheric particulate matter | |
| CN103743923A (en) | High-frequency vehicle speed collection system and collection method | |
| CN109450308B (en) | Swing drive control device and method | |
| CN105653877B (en) | A kind of infusion data processing system and method | |
| CN113551280B (en) | Control method of range hood | |
| CN110045147B (en) | Micro-flow detection method based on digital/analog double-parameter fusion | |
| CN211383173U (en) | Infusion pump dripping speed monitoring system | |
| CN202923490U (en) | Automobile back up anti-collision warning device based on ultrasonic waves | |
| CN208462113U (en) | One line light adjusting circuit, chip and system | |
| CN107967752A (en) | One kind cargo transport rack mobility control method and system | |
| CN115728519A (en) | Vehicle speed sensor acquisition and diagnosis circuit | |
| CN107204069A (en) | Paper currency identifier, the method for Paper currency identifier identification width of paper money and self-service device machine | |
| EP4036407B1 (en) | Pump control based on bubble detection | |
| AU766731B2 (en) | Drop detection method and apparatus | |
| CN114259620A (en) | Method for judging state of infusion pipeline and related equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wu Dixi Inventor before: Wu Yao |
|
| CB03 | Change of inventor or designer information | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170510 Address after: North Wanda Plaza, No. 689 Quanzhou Fengze District 362000 Fujian Bao Chau Road Building 9 room 4301 Patentee after: Wu Dixi Address before: 362000, south section of Zhi Tai Road (238), Qing Meng District, Quanzhou economic and Technological Development Zone, Fujian, China Patentee before: Quanzhou Silver Star Electronics Technology Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130109 Termination date: 20180418 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |