CN113855915A - Intelligent infusion monitor control method for accurately controlling dropping speed based on stepping motor - Google Patents
Intelligent infusion monitor control method for accurately controlling dropping speed based on stepping motor Download PDFInfo
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- 238000001802 infusion Methods 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000012544 monitoring process Methods 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims description 31
- 238000004364 calculation method Methods 0.000 claims description 6
- 239000011888 foil Substances 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 3
- 238000012546 transfer Methods 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000001990 intravenous administration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000474 nursing effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 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
- A61M5/142—Pressure infusion, e.g. using pumps
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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
- A61M5/16877—Adjusting flow; Devices for setting a flow rate
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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
- A61M5/16886—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body for measuring fluid flow rate, i.e. flowmeters
- A61M5/1689—Drip counters
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Abstract
The invention provides a control method of an intelligent infusion monitor based on a stepping motor for accurately controlling the dropping speed, which comprises the following steps: step 1: setting a target dropping speed of an intelligent transfusion monitoring instrument; step 2: acquiring the current dropping speed of the intelligent infusion monitor, and calculating an adjustment proportion basic value; and step 3: adjusting the basic value of the regulation ratio to form a corrected regulation ratio; and 4, step 4: setting a basic value of the adjusting step number of the stepping motor; and 5: adjusting the step number of the stepping motor so as to adjust the clamping state of the intelligent infusion monitor; step 6: and judging whether the difference between the current dropping speed and the target dropping speed is within an allowable error range, if so, terminating the adjustment, otherwise, carrying out fine adjustment until the difference is controlled to be within the allowable range. The stepping motor is adopted, and the corresponding algorithm is designed in a matched mode to control the sliding block to advance and retreat, so that the precision is high, and the stepping motor is flexible and convenient.
Description
Technical Field
The invention relates to the technical field of infusion monitoring instruments, in particular to a control method of an intelligent infusion monitoring instrument for accurately controlling the dropping speed based on a stepping motor.
Background
Intravenous infusion is a commonly used mode of administration in clinical therapy. The intravenous infusion speed is different according to the nature of the medicine and the constitution of the patients. The expected treatment effect is difficult to achieve even if the infusion is too fast or too slow, and the nursing safety is affected. At present, the common infusion apparatus widely applied clinically mainly inputs liquid to a receptor by depending on liquid level difference pressure, and controls the infusion speed by depending on visual observation of nursing staff and manual adjustment of a wheel clamp. The common infusion apparatus lacks functions of blocking alarm, bubble alarm, liquid infusion completion alarm and the like, and increases the burden of clinical care; and the liquid bottle is easy to introduce outside air polluted liquid. The infusion pump is an instrument which can control the number of infusion drops or the infusion flow rate, ensure that the medicine can enter the body of a patient to play a role in a uniform speed and accurate dosage, is an intelligent infusion device, has the infusion speed not influenced by the back pressure of the human body and an operator, is accurate and reliable in infusion, contributes to reducing the working intensity of clinical care, and improves the accuracy, the safety and the care quality of the infusion.
At present, the detection of liquid is carried out to current transfer pump mostly adopting photoelectric type or gravity type, and photoelectric type transfer pump consumption is high and can't be applied to the occasion that needs the light-resistant, and gravity type transfer pump error is big and can't monitor the state of liquid drop, adopts direct current motor to press from both sides the operation of pressing from both sides tight or releasing the transfer line moreover mostly, and the regulation precision is low, can't master the exact position of slider, can't accomplish in addition and carry out nimble quick adjustment according to current dripping speed.
Disclosure of Invention
The application provides an intelligent infusion monitor control method based on step motor accurate control drips fast, through step motor to the corresponding algorithm control slider of cooperation design advances and retreats, and the precision is high, and is nimble convenient.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a control method of an intelligent infusion monitor based on a stepping motor for accurately controlling the dropping speed comprises the following steps:
step 1: setting a target dropping speed of an intelligent transfusion monitoring instrument;
step 2: acquiring the current dropping speed of the intelligent infusion monitor, and calculating an adjustment proportion basic value based on the difference value between the current dropping speed and the target dropping speed of the intelligent infusion monitor;
and step 3: adjusting an adjustment proportion basic value based on a target dropping speed value of the intelligent transfusion monitoring instrument to form a corrected adjustment proportion;
and 4, step 4: setting a basic value of the adjustment step number of the stepping motor based on the current dropping speed of the intelligent infusion monitor;
and 5: the step motor adjusts the step number of the step motor based on the adjustment step number basic value and the corrected adjustment proportion, so as to adjust the clamping state of the intelligent infusion monitor;
step 6: acquiring the current dropping speed of the adjusted intelligent infusion apparatus, judging whether the difference between the current dropping speed and the target dropping speed is within an allowable error range, if so, terminating the adjustment, and stopping the stepping motor at the existing position; otherwise, repeating the step 2 to the step 4, and finely adjusting the adjusting proportion value and the proportion basic value until the difference between the dropping speed of the infusion monitor and the target dropping speed reaches an allowable error range.
Further, intelligence infusion control appearance includes the monitor body, the front of monitor body is equipped with the cavity that is used for holding the dropping funnel of transfer line, on the monitor body and be located the top and the below of cavity are equipped with the confession respectively the hole that the dropping funnel freely walked, the dropping funnel both sides are equipped with the metal foil, on the monitor body and be located the well upper and lower position of cavity is equipped with capacitive sensor, capacitive sensor records the real-time capacitance value of metal foil to feed back real-time capacitance value to the treater, whether the treater surpasss the threshold value according to received capacitance value, judges whether there is the dropping liquid to pass through, and the time interval of record between two adjacent dropping liquids is as the dropping speed of a back dropping liquid.
Preferably, the calculation of the current dropping speed in step 2 comprises the following steps:
step 2.1: the weighted calculation of the weighted velocity of each drop,
Swi＝ωiSi+ωi-1Si-1+…+ωi-a+1Si-a+1 (1)
wherein S iswiRepresents the weighted velocity, S, of the ith dropiRepresents the dropping speed of the ith dropping, closest to the current time, omegaiRepresents the weighted weight of the ith dropping, a is the number of weighted dropping speeds and is a constant, a is more than or equal to 3,
the weight satisfies the following condition:
ωi+ωi-1+…+ωi-a+1＝1 (2)
ωi＞ωi-1＞…＞ωi-a+1
step 2.2: removing the extreme dropping speed of a dropping speeds:
wherein S isnThe extreme dropping speed is represented as the dropping speed of the nth index, i-a +1 is more than or equal to n and less than or equal to i, SMRepresenting the median of a dropping speeds, and E represents the acceptability of the difference degree, namely when the difference degree is less than E, the difference degree is in an acceptable range, when the difference degree is more than E, the difference degree is too large, and E is a constant;
step 2.3: on the basis of the step 2.2, calculating the average value of the residual dropping speed, namely the current dropping speed:
wherein the content of the first and second substances,
b represents the number of extreme drop velocities, S, for the current drop velocitynxDenotes the x-th extreme drop velocity, SωxRepresents the weighted drop velocity for the xth drop velocity.
Further, the basic value of the adjustment ratio in step 2 is:
wherein k represents the basic value of the regulation ratio, S is the current dropping speed, S*The target dropping speed is delta, the allowable error is delta, and the constant is 0 < delta < 1.
Preferably, step 3 comprises:
①S*≥S1when k isi1/4k, wherein kiFor the corrected regulation ratio, S1Is a first threshold for drop velocity, is constant;
②S*≤S2when k isi1/2k, wherein S1Is a second threshold of drop velocity, is constant;
③S1＜S*＜S2when k isi＝k。
Preferably, the back of the monitor body is provided with a catheter guide groove for the infusion tube to pass through, a sliding block is arranged in the catheter guide groove, and the sliding block controls the moving position and direction through a stepping motor.
Further, the basic value of the number of adjustment steps of the step motor in the step 4 is as follows:
Pm＝11g (6)
wherein, PmThe method comprises the steps of representing a basic value of adjusting steps, wherein S is the current dropping speed, g is a group number, g is 8 when S is more than 0 and less than 750, g is 7 when S is more than or equal to 750 and less than 857, g is 6 when S is more than or equal to 857 and less than 1000, r is 5 when S is more than or equal to 1000 and less than 1200, g is 4 when S is more than or equal to 1200 and less than 1500, g is 3 when S is more than or equal to 1500 and g is 2 when S is more than 2000.
Preferably, the step number of the stepping motor in the step 5 satisfies the following formula:
P′i＝Pi+kiPm (7)
wherein, P'iIndicating the position, P, of the stepping motor after the number of steps has been adjustediIndicating the position of the stepper motor before the number of steps has been adjusted.
Preferably, the judgment formula of the regulation termination is as follows:
wherein S' represents the current dropping speed adjusted by the stepping motor.
Further preferably, the fine tuning formula is:
(ii) when S '< 1200ms, and S' > S*K'i＝1，P’m＝1/2Pm，
② when S '< 1200ms and S' < S*K'i＝-1，P’m＝1/2Pm，
Wherein, k'iDenotes a fine-tuned control ratio, P'mIndicating the base value of the number of adjustment steps for the fine adjustment.
The invention has the beneficial effects that:
the application provides an intelligent infusion monitor control method based on stepping motor accurate control dropping speed, has solved prior art and can not monitor the problem that infusion monitor slope and fall the state, carries out the measurement of attitude angle and acceleration through six sensors, and then whether the state discrimination formula is fallen through attitude angle slope state discrimination formula and acceleration fall the state discrimination formula and judge and incline or fall, and then early warning, safe and reliable.
1. In order to realize accurate detection of liquid dripping, the invention adopts the capacitance sensor, controls the reference value of the capacitance value to change along with the environment, sets the threshold value, and considers that liquid drops drip when the capacitance value obviously changes and exceeds the threshold value. The technical scheme for solving the similar problems in the market is generally photoelectric and gravity type, wherein the photoelectric type adopts a photoelectric switch, one end of the photoelectric switch emits infrared light, the other end of the photoelectric switch receives the infrared light, the dropping of liquid drops is judged through light shielding, the power consumption is high, and the photoelectric switch cannot be applied to occasions needing light shielding; the gravity type can estimate the residual liquid capacity only by measuring the weight of the infusion bottle, has large error and cannot monitor the state of the liquid drops.
2. In order to realize accurate adjustment of the dripping speed, the invention adopts the stepping motor and the sliding block, and the stepping motor accurately controls the forward and backward movement of the sliding block so as to control the clamping or loosening state of the dropper. In order to quickly and accurately regulate the dripping speed, various algorithms are used in the speed measurement and regulation process, so that the speed measurement is more accurate, and the speed regulation process is quicker.
3. According to the intelligent infusion monitoring instrument, the adjustment speed of the stepping motor is reduced through the algorithm setting of the adjustment proportion and the adjustment step number, and the adjustment efficiency of the intelligent infusion monitoring instrument is greatly improved.
4. The method solves the current dropping speed by weighting and removing the extreme value, and deducts the extreme value and the influence caused by abnormal water drops.
5. According to the invention, through correction of the adjustment proportion, the adjustment steps of the stepping motor are reduced, the occurrence of overshoot is greatly reduced, and the overall efficiency is effectively improved.
Drawings
FIG. 1 is a flow chart of the steps provided by the present invention;
FIG. 2 is a front view of the intelligent infusion monitor of the present invention;
FIG. 3 is a rear view of the intelligent infusion monitor of the present invention;
1-transfusion tube, 2-dropping funnel, 3-cavity, 4-hole, 5-capacitance sensor, 6-display screen, 7-guide duct guide groove, 8-slide block, 9-monitor body.
Detailed Description
The control method of the intelligent infusion monitor based on the accurate control of the dropping speed of the stepping motor is further described in detail with reference to the accompanying drawings and the specific implementation method.
Example 1
As shown in fig. 1, a control method of an intelligent infusion monitor based on a stepping motor for accurately controlling a dropping speed includes the following steps:
step 1: setting a target dropping speed of an intelligent transfusion monitoring instrument;
step 2: acquiring the current dropping speed of the intelligent infusion monitor, and calculating an adjustment proportion basic value based on the difference value between the current dropping speed and the target dropping speed of the intelligent infusion monitor;
and step 3: adjusting an adjustment proportion basic value based on a target dropping speed value of the intelligent transfusion monitoring instrument to form a corrected adjustment proportion;
and 4, step 4: setting a basic value of the adjustment step number of the stepping motor based on the current dropping speed of the intelligent infusion monitor;
and 5: the step motor adjusts the step number of the step motor based on the adjustment step number basic value and the corrected adjustment proportion, so as to adjust the clamping state of the intelligent infusion monitor;
step 6: acquiring the current dropping speed of the adjusted intelligent infusion apparatus, judging whether the difference between the current dropping speed and the target dropping speed is within an allowable error range, if so, terminating the adjustment, and stopping the stepping motor at the existing position; otherwise, repeating the step 2 to the step 4, and finely adjusting the adjusting proportion value and the proportion basic value until the difference between the dropping speed of the infusion monitor and the target dropping speed reaches an allowable error range.
Preferably, the back of the monitor body 9 is provided with a catheter guide groove 7 for the catheter of the infusion tube 1 to pass through, the catheter guide groove 7 has no edge, a slide block 8 is arranged in the catheter guide groove 7, and the slide block 8 controls the moving position and direction through a stepping motor. The invention adopts the stepping motor to push the sliding block to clamp or release the infusion tube, the stepping motor is controlled by a professional driving chip, positioning is carried out through absolute position, the error of stepping forward and backward is small, the positioning and adjusting precision is high, and the speed and the force can be flexibly controlled. The same type of equipment generally adopts a scheme of a direct current motor, the advancing distance and the retreating distance are controlled by the electrifying time, the adjusting frequency is generally fixed, the adjusting precision is low in the mode, the exact position of the sliding block cannot be mastered, and flexible and quick adjustment according to the current dripping speed cannot be achieved.
Further, the basic value of the adjustment ratio in step 2 is:
wherein k represents the basic value of the regulation ratio, S is the current dropping speed, S*The target dropping speed is delta, the allowable error is delta, and the constant is 0 < delta < 1. Here, δ is taken to be 10% of the engineer's experience.
Preferably, step 3 comprises:
①S*≥S1when k isi1/4k, wherein kiFor the corrected regulation ratio, S1The first threshold value for the drop velocity is constant, where S1Taking the empirical value of 25000ms,
②S*≤S2when k isi1/2k, wherein S2The second threshold value for the drop velocity is constant, where S2Taking an empirical value of 6000/5 ms;
③S1＜S*＜S2when k isi＝k。
Further, the basic value of the number of adjustment steps of the step motor in the step 4 is as follows:
Pm＝11g (6)
wherein, PmThe method comprises the steps of representing a basic value of adjusting steps, wherein S is the current dropping speed, g is a group number, g is 8 when S is more than 0 and less than 750, g is 7 when S is more than or equal to 750 and less than 857, g is 6 when S is more than or equal to 857 and less than 1000, r is 5 when S is more than or equal to 1000 and less than 1200, g is 4 when S is more than or equal to 1200 and less than 1500, g is 3 when S is more than or equal to 1500 and g is 2 when S is more than 2000.
Preferably, the step number of the stepping motor in the step 5 satisfies the following formula:
P′i＝Pi+kiPm (7)
wherein, P'iIndicating the position, P, of the stepping motor after the number of steps has been adjustediIndicating the position of the stepper motor before the number of steps has been adjusted.
Preferably, the judgment formula of the regulation termination is as follows:
wherein S' represents the current dropping speed adjusted by the stepping motor.
Further preferably, the fine tuning formula is:
(ii) when S '< 1200ms, and S' > S*K'i＝1，P’m＝1/2Pm，
② when S '< 1200ms and S' < S*K'i＝-1，P’m＝1/2Pm，
Wherein, k'iDenotes a fine-tuned control ratio, P'mIndicating the base value of the number of adjustment steps for the fine adjustment.
The invention stops adjusting after adjusting to the designated speed, and starts normal transfusion; if the dropping speed exceeds the designated range in the infusion process, the dropping speed is regulated again; if the first speed regulation can not reach the specified dropping speed, reporting the speed regulation failure and locking; if the subsequent speed regulation can not reach the designated speed, reporting the speed too fast or too slow according to the current dropping speed and locking; reporting that the liquid drops stop and are locked when the liquid drops stop in normal transfusion; and during the speed regulation, if the liquid drop is detected to stop, entering a retreating liquid drop detection state, starting to detect the liquid level, and reporting that the liquid drop stops and is locked if liquid streamer in a dropper is found.
Example 2
Example 2 differs from example 1 only in that: and (4) solving the current dropping speed by weighting and removing extreme values, and deducting the influence caused by the extreme values and the water drop viscosity.
Specifically, preferably, the calculation of the current dropping speed in step 2 includes the following steps:
step 2.1: the weighted calculation of the weighted velocity of each drop,
Swi＝ωiSi+ωi-1Si-1+…+ωi-a+1Si-a+1 (1)
wherein S iswiRepresents the weighted velocity, S, of the ith dropiRepresents the dropping speed of the ith dropping, closest to the current time, omegaiRepresents the weighted weight of the ith dropping, a is the number of weighted dropping speeds and is a constant, a is more than or equal to 3,
the weight satisfies the following condition:
ωi+ωi-1+…+ωi-a+1＝1 (2)
ωi＞ωi-1＞…＞ωi-a+1
preferably, ω isi＝(a-1)/a。
Step 2.2: removing the extreme dropping speed of a dropping speeds:
wherein S isnThe extreme dropping speed is represented as the dropping speed of the nth index, i-a + 1 is more than or equal to n and less than or equal to i, SMRepresenting the median of a drop velocities, E representing the acceptability of the difference, i.e. when the difference is less than E, the difference is within an acceptable range, when the difference is greater than E, the difference is too great, E is a constant, E is preferably any real number between 5 and 8;
step 2.3: on the basis of the step 2.2, calculating the average value of the residual dropping speed, namely the current dropping speed:
wherein the content of the first and second substances,
b represents the number of extreme drop velocities, S, for the current drop velocitynxDenotes the x-th extreme drop velocity, SωxRepresents the weighted drop velocity for the xth drop velocity.
Example 3
Example 3 differs from example 1 only in that: the dropping of the liquid drops is detected by the capacitance sensor, the time between two drops is recorded, the current dropping speed can be obtained, the distance needing to advance is calculated on the basis of the difference value of the current speed and the target speed, and then the stepping motor is driven to push the sliding block to reach the accurate position.
It is specific, intelligence infusion control appearance includes monitor body 9, monitor body 9's front is equipped with the cavity 3 that is used for holding infusion tube 1's drip chamber 2, on the monitor body 9 and be located the top and the below of cavity 3 are equipped with the confession respectively drip chamber 2 freely passes through hole 4, monitor body 9 is last and be located the well upper position of cavity 3 is equipped with capacitive sensor 5, capacitive sensor 5 records the real-time capacitance value of cavity horizontal direction to feed back real-time capacitance value to the treater, whether the treater surpasss the threshold value according to the received capacitance value, judge whether have the dropping liquid to pass through, and record the dropping speed of time interval between two adjacent dropping liquids as a back dropping liquid. It should be noted that, the distance change of the stepping motor used in the present invention is 3-4mm every 3 ten thousand steps.
In order to realize accurate detection of liquid dripping, the invention adopts the capacitance sensor, controls the reference value of the capacitance value to change along with the environment, sets the threshold value, and considers that liquid drops drip when the capacitance value obviously changes and exceeds the threshold value.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
While the invention has been described with respect to a limited number of embodiments, those skilled in the art, having benefit of this description, will appreciate that other embodiments can be devised which do not depart from the scope of the invention as described herein. Furthermore, it should be noted that the language used in the specification has been principally selected for readability and instructional purposes, and may not have been selected to delineate or circumscribe the inventive subject matter. Accordingly, many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the disclosure. The disclosure of the present invention is intended to be illustrative, but not limiting, of the scope of the invention.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (10)
1. A control method of an intelligent infusion monitor based on a stepping motor for accurately controlling the dropping speed is characterized by comprising the following steps:
step 1: setting a target dropping speed of an intelligent transfusion monitoring instrument;
step 2: acquiring the current dropping speed of the intelligent infusion monitor, and calculating an adjustment proportion basic value based on the difference value between the current dropping speed and the target dropping speed of the intelligent infusion monitor;
and step 3: adjusting an adjustment proportion basic value based on a target dropping speed value of the intelligent transfusion monitoring instrument to form a corrected adjustment proportion;
and 4, step 4: setting a basic value of the adjustment step number of the stepping motor based on the current dropping speed of the intelligent infusion monitor;
and 5: the step motor adjusts the step number of the step motor based on the adjustment step number basic value and the corrected adjustment proportion, so as to adjust the clamping state of the intelligent infusion monitor;
step 6: acquiring the current dropping speed of the adjusted intelligent infusion apparatus, judging whether the difference between the current dropping speed and the target dropping speed is within an allowable error range, if so, terminating the adjustment, and stopping the stepping motor at the existing position; otherwise, repeating the step 2 to the step 4, and finely adjusting the adjusting proportion value and the proportion basic value until the difference between the dropping speed of the infusion monitor and the target dropping speed reaches an allowable error range.
2. The intelligent infusion monitor control method based on the stepping motor for accurately controlling the dropping speed is characterized by comprising a monitor body (9), wherein a cavity (3) for accommodating a dropping funnel (2) of an infusion tube (1) is formed in the front of the monitor body (9), metal foils are arranged on two sides of the dropping funnel (2), holes (4) for the dropping funnel (2) to freely pass through are respectively formed in the monitor body (9) above and below the cavity (3), a capacitance sensor (5) is arranged in the middle-upper position of the cavity (3) on the monitor body (9), the capacitance sensor (5) records the real-time capacitance value of the metal foils and feeds the real-time capacitance value back to a processor, and the processor determines whether the received capacitance value exceeds a threshold value or not, judge whether there is the dropping liquid to pass through to the time interval of record between two adjacent dropping liquids is as the dripping speed of a back dropping liquid, still be equipped with display screen (6) on monitor body (9), display screen (6) are used for showing the dripping speed.
3. The control method of the intelligent infusion monitor based on the stepping motor for accurately controlling the dropping speed according to the claim 2, wherein the calculation of the current dropping speed in the step 2 comprises the following steps:
step 2.1: the weighted calculation of the weighted velocity of each drop,
Swi＝ωiSi+ωi-1Si-1+…+ωi-a+1Si-a+1 (1)
wherein S iswiRepresents the weighted velocity, S, of the ith dropiRepresents the dropping speed of the ith dropping, closest to the current time, omegaiRepresents the weighted weight of the ith dropping, a is the number of weighted dropping speeds and is a constant, a is more than or equal to 3,
the weight satisfies the following condition:
ωi+ωi-1+…+ωi-a+1＝1 (2)
ωi＞ωi-1＞…＞ωi-a+1
step 2.2: removing the extreme dropping speed of a dropping speeds:
wherein S isnThe extreme dropping speed is represented as the dropping speed of the nth index, i-a +1 is more than or equal to n and less than or equal to i, SMRepresenting the median of a dropping speeds, and E represents the acceptability of the difference degree, namely when the difference degree is less than E, the difference degree is in an acceptable range, when the difference degree is more than E, the difference degree is too large, and E is a constant;
step 2.3: on the basis of the step 2.2, calculating the average value of the residual dropping speed, namely the current dropping speed:
wherein the content of the first and second substances,
b represents the number of extreme drop velocities, S, for the current drop velocitynxDenotes the x-th extreme drop velocity, SωxRepresents the weighted drop velocity for the xth drop velocity.
4. The control method of the intelligent infusion monitor based on the stepping motor for accurately controlling the dropping speed according to the claim 2, wherein the basic value of the adjusting proportion in the step 2 is as follows:
wherein k represents the basic value of the regulation ratio, S is the current dropping speed, S*The target dropping speed is delta, the allowable error is delta, and the constant is 0 < delta < 1.
5. The control method of the intelligent infusion monitor based on the stepping motor for accurately controlling the dropping speed according to the claim 4, wherein the step 3 comprises the following steps:
①S*≥S1when k isi＝1/4kWherein k isiFor the corrected regulation ratio, S1Is a first threshold for drop velocity, is constant;
②S*≤S2when k isi1/2k, wherein S2Is a second threshold of drop velocity, is constant;
③S1＜S*＜S2when k isi＝k。
6. The control method of the intelligent infusion monitor based on the stepping motor for accurately controlling the dripping speed is characterized in that a catheter guide groove (7) for the catheter of the infusion tube (1) to pass through is formed in the back face of the monitor body (9), a sliding block (8) is arranged in the catheter guide groove (7), and the sliding block (8) controls the moving position and direction through the stepping motor.
7. The control method of the intelligent infusion monitor based on the stepping motor for accurately controlling the dripping speed according to the claim 6, wherein the basic value of the number of the adjusting steps of the stepping motor in the step 4 is as follows:
Pm＝11g (6)
wherein, PmThe method comprises the steps of representing a basic value of adjusting steps, wherein S is the current dropping speed, g is a group number, g is 8 when S is more than 0 and less than 750, g is 7 when S is more than or equal to 750 and less than 857, g is 6 when S is more than or equal to 857 and less than 1000, r is 5 when S is more than or equal to 1000 and less than 1200, g is 4 when S is more than or equal to 1200 and less than 1500, g is 3 when S is more than or equal to 1500 and g is 2 when S is more than 2000.
8. The control method of the intelligent infusion monitor based on the stepping motor for accurately controlling the dripping speed according to the claim 7, wherein the step number of the stepping motor in the step 5 satisfies the following formula:
P′i＝Pi+kiPm (7)
wherein, P'iIndicating the position, P, of the stepping motor after the number of steps has been adjustediIndicating the position of the stepper motor before the number of steps has been adjusted.
9. The control method of the intelligent infusion monitor based on the stepping motor for accurately controlling the dropping speed according to the claim 8, wherein the judgment formula of the adjustment termination is as follows:
wherein S' represents the current dropping speed adjusted by the stepping motor.
10. The control method of the intelligent infusion monitor based on the stepping motor for accurately controlling the dropping speed according to the claim 9, wherein the fine adjustment formula is as follows:
(ii) when S '< 1200ms, and S' > S*K'i＝1，P’m＝1/2Pm，
② when S '< 1200ms and S' < S*K'i＝-1，P’m＝1/2Pm，
Wherein, k'iDenotes a fine-tuned control ratio, P'mIndicating the base value of the number of adjustment steps for the fine adjustment.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114452482A (en) * | 2022-02-10 | 2022-05-10 | 江苏爱朋医疗科技股份有限公司 | Infusion dripping speed adjusting method, infusion control system and infusion equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140039828A1 (en) * | 2011-06-09 | 2014-02-06 | Fujitsu Limited | Drop determining device and drop determining method |
| US20180177945A1 (en) * | 2014-11-12 | 2018-06-28 | The General Hospital Corporation | Flow rate measurement and control of infusion devices |
| CN208243856U (en) * | 2016-12-23 | 2018-12-18 | 南京信息工程大学 | A kind of SCM Based liquid dripping speed monitoring device |
| CN113274583A (en) * | 2021-05-26 | 2021-08-20 | 北京大学第三医院（北京大学第三临床医学院） | Injection management system with multi-parameter configuration |
-
2021
- 2021-09-26 CN CN202111128066.5A patent/CN113855915B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140039828A1 (en) * | 2011-06-09 | 2014-02-06 | Fujitsu Limited | Drop determining device and drop determining method |
| US20180177945A1 (en) * | 2014-11-12 | 2018-06-28 | The General Hospital Corporation | Flow rate measurement and control of infusion devices |
| CN208243856U (en) * | 2016-12-23 | 2018-12-18 | 南京信息工程大学 | A kind of SCM Based liquid dripping speed monitoring device |
| CN113274583A (en) * | 2021-05-26 | 2021-08-20 | 北京大学第三医院（北京大学第三临床医学院） | Injection management system with multi-parameter configuration |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114452482A (en) * | 2022-02-10 | 2022-05-10 | 江苏爱朋医疗科技股份有限公司 | Infusion dripping speed adjusting method, infusion control system and infusion equipment |
| CN114452482B (en) * | 2022-02-10 | 2023-12-29 | 江苏爱朋医疗科技股份有限公司 | Infusion drip speed adjusting method, infusion control system and infusion equipment |
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