Infusion speed adjusting method, system and device

Abstract

The invention discloses an infusion speed adjusting method, system and device, and the method comprises the steps: firstly obtaining the current infusion speed of an infusion tube, determining the speed adjustment amount according to the preset infusion speed, and determining the adjusted target infusion speed based on the speed adjustment amount, thereby adjusting the frequency of an infusion pump to control a peristaltic box to extrude the infusion tube; therefore, the infusion speed can be adjusted. It can be seen that after the preset infusion speed is set, the liquid flowing speed in the infusion tube is detected in real time instead of the situation that the wriggling box extrudes the infusion tube according to the extrusion frequency corresponding to the preset infusion speed and the extrusion frequency is kept unchanged; therefore, the extrusion frequency of the peristaltic box is dynamically adjusted according to the actual current infusion speed in the infusion tube, so that the flowing speed of liquid in the infusion tube is the preset infusion speed, and the stability of the flowing speed of the liquid in the infusion tube in the infusion process is guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of speed control, and in particular to an infusion speed regulating method, system and device. Background Art

[0002] At present, infusion pumps are widely used in clinical hospitals to infuse patients. The principle of the infusion pump is to squeeze the infusion tube at a frequency corresponding to the preset infusion speed through the peristaltic box, so that the liquid in the infusion tube is pushed forward, thereby achieving infusion of the patient at the preset infusion speed. However, since the material of the infusion tube is rubber or other elastic materials, when the infusion tube is squeezed at different frequencies, the infusion tube produces elastic deformation, that is, the rebound time is also different, resulting in the actual infusion speed being different from the preset infusion speed, and the infusion accuracy is deviated; and because the elastic deformation of the infusion tube is plastic deformation, the infusion tube cannot rebound normally after being squeezed for a long time, which will result in different infusion speeds at different times, unable to meet the preset infusion speed, and will also cause deviations in the infusion accuracy; in addition, the rebound speed of the infusion tube is also affected by temperature. The rebound speed of the infusion tube is different at different temperatures, resulting in different infusion speeds, which will also cause deviations in the infusion accuracy. Summary of the invention

[0003] The purpose of the present invention is to provide an infusion speed adjustment method, system and device. After setting the preset infusion speed, instead of maintaining the peristaltic box to squeeze the infusion tube according to the squeezing frequency corresponding to the preset infusion speed and keeping the squeezing frequency unchanged, the liquid flow speed in the infusion tube is detected in real time, so as to dynamically adjust the squeezing frequency of the peristaltic box according to the actual current infusion speed in the infusion tube to ensure that the liquid flow speed in the infusion tube is the preset infusion speed, thereby ensuring the stability of the liquid flow speed in the infusion tube during the infusion process.

[0004] In order to solve the above technical problems, the present invention provides an infusion speed adjustment method, which is applied to an infusion pump, and the method comprises:

[0005] Acquire the current infusion speed of the infusion tube; the current infusion speed is the flow speed of the liquid in the infusion tube after the infusion pump controls the peristaltic box to squeeze the infusion tube at an squeezing frequency corresponding to a preset infusion speed;

[0006] determining a speed adjustment amount based on the current infusion speed and the preset infusion speed;

[0007] The preset infusion speed is adjusted based on the speed adjustment amount to generate an adjusted target infusion speed, so that after the infusion pump controls the peristaltic box to squeeze the infusion tube at an extrusion frequency corresponding to the target infusion speed, the liquid flow speed in the infusion tube is the preset infusion speed.

[0008] Preferably, obtaining the current infusion speed of the infusion tube includes:

[0009] Obtaining the number of unit drops in the drip pot of the infusion tube per unit time;

[0010] The current infusion rate is determined based on the unit drop number, the preset volume of each drop of liquid, and the unit time.

[0011] Preferably, after obtaining the current infusion speed of the infusion tube, the method further includes:

[0012] Performing filtering on the current infusion speed;

[0013] Determining a speed adjustment amount based on the current infusion speed and the preset infusion speed includes:

[0014] The speed adjustment amount is determined based on the current infusion speed after filtering and the preset infusion speed.

[0015] Preferably, filtering the current infusion speed includes:

[0016] Generate an estimated infusion speed value based on the historical infusion speed acquired at the last moment and the preset infusion speed;

[0017] The current infusion speed after filtering is determined based on a preset estimated weight of the infusion speed estimate value and a preset actual weight of the current infusion speed.

[0018] Preferably, determining the speed adjustment amount based on the current infusion speed and the preset infusion speed includes:

[0019] The speed adjustment amount is determined by subtracting the current infusion speed from the preset infusion speed.

[0020] Preferably, determining the speed adjustment amount based on the current infusion speed and the preset infusion speed includes:

[0021] Determine the difference obtained by subtracting the current infusion speed from the preset infusion speed as a speed error;

[0022] Determining a proportional term, an integral term, and a differential term of the velocity error based on a proportional coefficient, an integral coefficient, and a differential coefficient;

[0023] The speed adjustment amount is calculated using a preset function based on the proportional term, the integral term, and the differential term.

[0024] Preferably, before determining the difference obtained by subtracting the current infusion speed from the preset infusion speed as the speed error, the method further comprises:

[0025] Determine the difference obtained by subtracting the current infusion speed from the preset infusion speed as a speed error;

[0026] determining a rate of change of the velocity error based on the velocity error;

[0027] converting the speed error and the rate of change of the speed error into fuzzy sets;

[0028] Calling a fuzzy controller to perform reasoning based on the fuzzy set and preset fuzzy rules, and determining a fuzzy result output by the fuzzy controller;

[0029] Converting the fuzzy result into a speed compensation amount;

[0030] Adjusting the preset infusion speed based on the speed adjustment amount to determine the adjusted target infusion speed includes:

[0031] The preset infusion speed is adjusted based on the speed compensation amount and the speed adjustment amount, and an adjusted target infusion speed is determined.

[0032] Preferably, the preset infusion speed is adjusted based on the speed adjustment amount to generate an adjusted target infusion speed, so that after the infusion pump controls the peristaltic box to squeeze the infusion tube at an squeezing frequency corresponding to the target infusion speed, the liquid flow speed in the infusion tube is the preset infusion speed, including:

[0033] The sum obtained by adding the speed adjustment amount to the current infusion speed is set as the adjusted target infusion speed, so that after the infusion pump controls the peristaltic box to squeeze the infusion tube at the squeezing frequency corresponding to the target infusion speed, the liquid flow speed in the infusion tube is the preset infusion speed.

[0034] In order to solve the above technical problems, the present application provides an infusion speed regulation system, which is applied to an infusion pump, and the system comprises:

[0035] An acquisition unit, used for acquiring a current infusion speed of the infusion tube; the current infusion speed is a flow speed of the liquid in the infusion tube after the infusion pump controls the peristaltic box to squeeze the infusion tube at an squeezing frequency corresponding to a preset infusion speed;

[0036] a determining unit, configured to determine a speed adjustment amount based on the current infusion speed and the preset infusion speed;

[0037] The adjustment unit is used to adjust the preset infusion speed based on the speed adjustment amount to generate an adjusted target infusion speed so that after the infusion pump controls the peristaltic box to squeeze the infusion tube at an extrusion frequency corresponding to the target infusion speed, the liquid flow speed in the infusion tube is the preset infusion speed.

[0038] In order to solve the above technical problems, the present application provides an infusion speed regulating device, comprising:

[0039] Memory for storing computer programs;

[0040] The processor is used to implement the steps of the infusion speed adjustment method as described above when executing the computer program.

[0041] The present application provides an infusion speed adjustment method, system and device. In this scheme, the current infusion speed of the infusion tube is first obtained, and the speed adjustment amount is determined according to the preset infusion speed. The adjusted target infusion speed is determined based on the speed adjustment amount, so as to adjust the frequency of the infusion pump controlling the peristaltic box to squeeze the infusion tube to achieve the adjustment of the infusion speed. It can be seen that in this application, after setting the preset infusion speed, it is not to keep the peristaltic box squeezing the infusion tube according to the squeezing frequency corresponding to the preset infusion speed and keep the squeezing frequency unchanged, but to detect the liquid flow speed in the infusion tube in real time, so as to dynamically adjust the squeezing frequency of the peristaltic box according to the actual current infusion speed in the infusion tube, so as to ensure that the liquid flow speed in the infusion tube is the preset infusion speed, and to ensure the stability of the liquid flow speed in the infusion tube during the infusion process. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 A schematic diagram of a flow chart of an infusion speed regulation method provided in the present application;

[0044] Figure 2 A schematic diagram of the structure of an infusion speed regulation system provided in this application;

[0045] Figure 3 This is a schematic diagram of the structure of an infusion speed regulating device provided in this application. DETAILED DESCRIPTION

[0046] The core of the present invention is to provide an infusion speed adjustment method, system and device. After the preset infusion speed is set, instead of maintaining the peristaltic box to squeeze the infusion tube according to the squeezing frequency corresponding to the preset infusion speed and keeping the squeezing frequency unchanged, the liquid flow speed in the infusion tube is detected in real time, so as to dynamically adjust the squeezing frequency of the peristaltic box according to the actual current infusion speed in the infusion tube to ensure that the liquid flow speed in the infusion tube is the preset infusion speed, thereby ensuring the stability of the liquid flow speed in the infusion tube during the infusion process.

[0047] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] Please refer to Figure 1 , Figure 1 A flow chart of an infusion speed adjustment method provided in the present application, which is applied to an infusion pump, includes:

[0049] S11: obtaining the current infusion speed of the infusion tube; the current infusion speed is the flow speed of the liquid in the infusion tube after the infusion pump controls the peristaltic box to squeeze the infusion tube at an squeezing frequency corresponding to a preset infusion speed;

[0050] At present, infusion pumps are widely used in clinical practice to provide infusions to recipients. The preset extrusion frequency of the peristaltic box can be determined according to the preset infusion speed, and the frequency of the peristaltic box squeezing the infusion tube can be set by the infusion pump, so that the peristaltic box squeezes the infusion tube at the preset extrusion frequency. Then, the liquid in the infusion tube will flow at the preset infusion speed, thereby achieving infusion for the user at the preset infusion speed. The material of the infusion tube is usually rubber or other elastic materials. The infusion tube is continuously squeezed by the peristaltic box to form elastic deformation, and then the deformation rebounds to squeeze the liquid into the body of the infusion recipient. If the infusion time is long, after the infusion tube is squeezed for a long time, the deformation of the infusion tube is plastic deformation, and the time for deformation rebound is different. For example, the deformation rebound time of the infusion tube is short at the beginning of the infusion, but as the number of squeezing increases, the squeezing time becomes longer, and the deformation rebound time of the infusion tube becomes longer. Although the peristaltic box still squeezes the infusion tube at the preset squeezing frequency, the flow rate of the liquid in the infusion tube is less than the preset infusion rate, and the accuracy of the liquid flow rate in the infusion tube deviates, which cannot meet the infusion requirements. In addition, since the material of the infusion tube is greatly affected by temperature changes, when the temperature difference of the environment where the infusion tube is located during the infusion process is large, the deformation rebound time of the infusion tube is also different, which also leads to different flow rates of the liquid in the infusion tube.

[0051] In order to solve the above technical problems, in this embodiment, after the squeezing frequency of the peristaltic box on the infusion tube is determined according to the preset infusion speed, the peristaltic box is used to squeeze the infusion tube. However, the liquid flow speed in the infusion tube may not be the same as the preset infusion speed. Therefore, in this embodiment, the current infusion speed in the infusion tube is obtained in real time, so that the difference between the current infusion speed and the preset infusion speed can be determined, and the subsequent infusion speed can be adjusted.

[0052] S12: determining a speed adjustment amount based on a current infusion speed and a preset infusion speed;

[0053] After determining the current infusion speed, the difference between the current infusion speed and the preset infusion speed can be determined based on the current infusion speed and the preset infusion speed, thereby determining the speed adjustment amount. That is, the purpose of adjusting the infusion speed is to make the liquid flow speed in the infusion tube the preset infusion speed, or to keep the liquid flow speed in the infusion tube stable so that the infusion recipient can receive infusion at a stable infusion speed.

[0054] S13: Adjust the preset infusion speed based on the speed adjustment amount to generate an adjusted target infusion speed, so that after the infusion pump controls the peristaltic box to squeeze the infusion tube at the squeezing frequency corresponding to the target infusion speed, the liquid flow speed in the infusion tube is the preset infusion speed.

[0055] After the speed adjustment amount is determined, the current infusion speed is adjusted according to the speed adjustment amount, and an adjusted target infusion speed is generated. That is, the peristaltic box does not always squeeze the infusion tube at the extrusion frequency corresponding to the preset infusion speed, but adjusts the extrusion frequency according to the deviation between the current infusion speed and the preset infusion speed. However, the ultimate goal of the extrusion adjustment is to maintain the liquid flow rate in the infusion tube at the preset infusion speed. Therefore, no matter how the target infusion speed changes, the liquid flow rate in the infusion tube is ultimately targeted at the preset infusion speed to ensure that the liquid flow rate in the infusion tube is in a stable state.

[0056] In summary, no matter what temperature environment the infusion tube is in, the extrusion frequency of the peristaltic box can be adjusted in real time, thereby ensuring the stability of the liquid flow rate in the infusion tube.

[0057] It can be seen that in this embodiment, after the preset infusion speed is set, the peristaltic box is not maintained to squeeze the infusion tube according to the extrusion frequency corresponding to the preset infusion speed and keep the extrusion frequency unchanged, but the liquid flow speed in the infusion tube is detected in real time, so as to dynamically adjust the extrusion frequency of the peristaltic box according to the actual current infusion speed in the infusion tube to ensure that the liquid flow speed in the infusion tube is the preset infusion speed, thereby ensuring the stability of the liquid flow speed in the infusion tube during the infusion process.

[0058] Based on the above embodiments:

[0059] As a preferred embodiment, obtaining the current infusion speed of the infusion tube includes:

[0060] Get the number of unit drops in the drip pot of the infusion tube per unit time;

[0061] The current infusion rate is determined based on the number of unit drops, the preset volume of each drop of liquid, and the unit time.

[0062] In this embodiment, when determining the current infusion speed in the infusion tube, the number of unit droplets per unit time is specifically detected at the drip pot of the infusion tube. Since the volume of each drop of liquid is a relatively balanced preset volume, the current infusion speed can be determined based on the number of unit droplets, the preset volume of each drop of liquid and the unit time. That is, the product of the number of unit droplets and the preset volume of each drop of liquid can be calculated and determined as the liquid flow volume per unit time, thereby determining the current infusion speed.

[0063] Among them, the preset volume can be but is not limited to being determined by the specifications of the infusion tube. For example, if the specification of the infusion tube is 20 drops / mL, then the preset volume is 1 / 20mL. If the unit time is 1min and the unit drop number is 40 drops, then the current infusion speed is 2mL / min; and if the specification of the infusion tube is 60 drops / mL, then the preset volume is 1 / 60mL.

[0064] Specifically, a drip rate sensor can be set at the drip pot, and the drip rate sensor can be used to identify the number of unit droplets in the drip pot per unit time. Specifically, the drip rate sensor can be clamped on the outside of the drip pot. The drip rate sensor emits light in the drip pot. When liquid drips from the drip pot, the light is blocked or reflected. The drip rate sensor can determine the number of unit droplets based on the number of times the light is blocked or reflected per unit time. Of course, the present application does not limit this, and it is sufficient to determine the current infusion speed in the infusion tube.

[0065] As a preferred embodiment, after obtaining the current infusion speed of the infusion tube, the method further includes:

[0066] Filter the current infusion speed;

[0067] The speed adjustment amount is determined based on the current infusion speed and the preset infusion speed, including:

[0068] The speed adjustment amount is determined based on the current infusion speed after filtering and the preset infusion speed.

[0069] Considering that when obtaining the current infusion speed in the infusion tube, especially when obtaining the number of unit drops in the drip pot per unit time through the drip rate sensor, there may be a jitter signal in the current infusion speed due to the jitter of the infusion tube or other reasons, in order to determine a more accurate speed adjustment amount, the current infusion speed obtained is also filtered in this embodiment to filter out the jitter signal in the current infusion speed, thereby ensuring that the subsequently determined speed adjustment amount makes the control of the liquid flow speed in the infusion tube more precise, that is, closer to the preset infusion speed.

[0070] As a preferred embodiment, filtering the current infusion speed includes:

[0071] Generate an estimated infusion speed value based on the historical infusion speed obtained at the last moment and the preset infusion speed;

[0072] The current infusion speed after filtering is determined based on a preset estimated weight of the infusion speed estimate and a preset actual weight of the current infusion speed.

[0073] In this embodiment, the current infusion speed of the infusion tube is obtained according to the preset acquisition frequency, and the extrusion frequency of the peristaltic box is adjusted in real time after the current infusion speed is obtained. When filtering the current infusion speed, the historical infusion speed obtained at the previous moment is first determined, and an infusion speed estimation value is generated according to the historical infusion speed and the preset infusion speed. The infusion speed estimation value is the predicted state of the infusion tube at the current moment, that is, the predicted current infusion speed. The preset estimation weight of the infusion speed estimation value and the preset actual weight of the obtained current infusion speed are then used to calculate a weighted average, thereby determining the current infusion speed after filtering, so as to filter out the jitter signal in the obtained current infusion speed.

[0074] It should be noted that in this embodiment, the preset estimated weight and the preset actual weight can be adjusted according to the final target infusion rate and the deviation between the liquid flow rate in the infusion tube and the preset flow rate, so as to improve the accuracy of the adjustment of the liquid flow rate in the infusion tube.

[0075] As a preferred embodiment, determining the speed adjustment amount based on the current infusion speed and the preset infusion speed includes:

[0076] The difference between the preset infusion speed and the current infusion speed is determined as the speed adjustment amount.

[0077] In this embodiment, when determining the speed adjustment amount, it can be determined directly based on the difference obtained by subtracting the current infusion speed from the preset infusion speed, which is easy to operate.

[0078] As a preferred embodiment, determining the speed adjustment amount based on the current infusion speed and the preset infusion speed includes:

[0079] The difference obtained by subtracting the current infusion speed from the preset infusion speed is determined as the speed error;

[0080] Determining a proportional term, an integral term, and a differential term of a velocity error based on a proportional coefficient, an integral coefficient, and a differential coefficient;

[0081] The speed adjustment is calculated using a preset function based on the proportional, integral and derivative terms.

[0082] In this embodiment, in order to accurately adjust the liquid flow rate in the infusion tube, the proportional term of the speed error is determined by the proportional coefficient, thereby determining the degree of response to the speed error when adjusting the liquid flow rate in the infusion tube; the integral term of the speed error is determined by the integral coefficient, thereby eliminating the steady-state error when adjusting the liquid flow rate in the infusion tube; the differential term of the speed error is determined by the differential coefficient, thereby adjusting the rate of change of the speed error, predicting future error trends, and reducing overshoot and oscillation caused by excessive speed errors.

[0083] In summary, based on the proportional term, the integral term and the differential term, the speed adjustment amount is calculated using a preset function so that when the target infusion speed is determined according to the speed adjustment amount, the rapid and stable flow rate of the liquid in the infusion tube is ensured.

[0084] As a preferred embodiment, before determining the difference obtained by subtracting the current infusion speed from the preset infusion speed as the speed error, the method further includes:

[0085] The difference obtained by subtracting the current infusion speed from the preset infusion speed is determined as the speed error;

[0086] determining a rate of change of the velocity error based on the velocity error;

[0087] Convert the speed error and the rate of change of the speed error into fuzzy sets;

[0088] Calling the fuzzy controller to perform reasoning based on the fuzzy set and the preset fuzzy rules, and determining the fuzzy result output by the fuzzy controller;

[0089] Convert the fuzzy result into speed compensation;

[0090] The preset infusion speed is adjusted based on the speed adjustment amount, and the adjusted target infusion speed is determined, including:

[0091] The preset infusion speed is adjusted based on the speed compensation amount and the speed adjustment amount, and the adjusted target infusion speed is determined.

[0092] In order to further ensure the precise adjustment of the liquid flow rate in the infusion tube, the present embodiment also determines the rate of change of the speed error during the infusion process, and converts the speed error and the rate of change of the speed error into a fuzzy set, and calls the fuzzy controller to perform reasoning based on the fuzzy set and preset fuzzy rules, and determines the fuzzy result output by the fuzzy controller, and converts it into a speed compensation amount based on the fuzzy result, and finally adjusts the current infusion speed after combining the speed compensation amount and the speed adjustment amount, determines the adjusted target infusion speed, and determines whether it is necessary to increase or decrease the target infusion speed according to the size of the error and the change trend, so as to ensure smooth and precise adjustment of the liquid flow rate in the infusion tube.

[0093] It should be noted that the fuzzy controller is a controller designed based on fuzzy logic. It uses fuzzy sets, fuzzy rules and fuzzy reasoning to deal with uncertainty and nonlinear problems. Specifically, the fuzzy controller can handle the uncertainty and ambiguity in the infusion speed regulation process, provide smooth transition response and good stability, and can flexibly adapt to different control requirements and system changes by adjusting fuzzy rules and membership functions. In addition, the fuzzy controller has good robustness to parameter changes and external disturbances, and can maintain the stable operation of the system. The design and implementation are relatively simple, and can be constructed through standard fuzzy logic toolboxes and reasoning mechanisms.

[0094] The design of fuzzy controller includes the following steps:

[0095] Define fuzzy variables, that is, determine the input variables, output variables and control variables of the system, and define their fuzzy sets and membership functions; establish a fuzzy rule base, and establish a fuzzy control rule base based on experience and knowledge. These rules describe the relationship between input and output; fuzzy reasoning: use the fuzzy reasoning mechanism to derive the control action according to the current input state; defuzzification: convert the output of the fuzzy controller into an accurate control signal in order to perform specific control actions; debugging and optimization: debug and optimize the fuzzy controller through simulation and experiments to meet specific performance requirements.

[0096] As a preferred embodiment, the preset infusion speed is adjusted based on the speed adjustment amount to generate an adjusted target infusion speed, so that after the infusion pump controls the peristaltic box to squeeze the infusion tube at the squeezing frequency corresponding to the target infusion speed, the liquid flow speed in the infusion tube is the preset infusion speed, including:

[0097] The sum of the speed adjustment amount and the current infusion speed is set as the adjusted target infusion speed, so that after the infusion pump controls the peristaltic box to squeeze the infusion tube at the squeezing frequency corresponding to the target infusion speed, the liquid flow speed in the infusion tube is the preset infusion speed.

[0098] In this embodiment, when determining the target infusion speed, the speed adjustment amount can be directly added to the current infusion speed, and the sum can be set as the adjusted target infusion speed. After the infusion pump controls the peristaltic box to squeeze the infusion tube at the extrusion frequency corresponding to the target infusion speed, the liquid flow speed in the infusion tube can be adjusted to the preset infusion speed.

[0099] It should be noted that during the actual infusion process, the liquid flow rate in the infusion tube may be greater than the preset infusion speed, or may be less than the preset infusion speed. Therefore, the speed adjustment amount may be positive or negative, and the speed compensation amount may also be positive or negative. The target infusion speed may be the sum of the speed adjustment amount, the speed compensation amount and the current infusion speed. However, the actually determined target infusion speed may be less than the preset infusion speed, or may be greater than the preset infusion speed. However, the ultimate goal is to adjust the infusion speed in the infusion tube until the liquid flow rate in the infusion tube stabilizes at the preset infusion speed.

[0100] In addition, the preset infusion speed can be adjusted according to the actual condition of the infusion recipient and the type of liquid, and this application does not limit this.

[0101] Please refer to Figure 2 , Figure 2 This is a schematic diagram of the structure of an infusion speed regulation system provided in the present application, which is applied to an infusion pump, including:

[0102] An acquisition unit 21 is used to acquire the current infusion speed of the infusion tube; the current infusion speed is the flow speed of the liquid in the infusion tube after the infusion pump controls the peristaltic box to squeeze the infusion tube at an squeezing frequency corresponding to a preset infusion speed;

[0103] A determination unit 22, configured to determine a speed adjustment amount based on a current infusion speed and a preset infusion speed;

[0104] The adjustment unit 23 is used to adjust the preset infusion speed based on the speed adjustment amount to generate an adjusted target infusion speed so that after the infusion pump controls the peristaltic box to squeeze the infusion tube at the squeezing frequency corresponding to the target infusion speed, the liquid flow speed in the infusion tube is the preset infusion speed.

[0105] The acquisition unit 21 is specifically used for:

[0106] Get the number of unit drops in the drip pot of the infusion tube per unit time;

[0107] The current infusion rate is determined based on the number of unit drops, the preset volume of each drop of liquid, and the unit time.

[0108] The infusion speed regulation system also includes:

[0109] A filtering processing unit, configured to filter the current infusion speed after the acquisition unit 21 acquires the current infusion speed of the infusion tube;

[0110] The determining unit 22 is specifically configured to determine the speed adjustment amount based on the current infusion speed after filtering and the preset infusion speed.

[0111] The filtering processing unit is specifically used to generate an infusion speed estimation value based on the historical infusion speed obtained at the previous moment and the preset infusion speed; and determine the current infusion speed after filtering based on the preset estimation weight of the infusion speed estimation value and the preset actual weight of the current infusion speed.

[0112] The determination unit 22 is specifically configured to determine the difference obtained by subtracting the current infusion speed from the preset infusion speed as the speed adjustment amount.

[0113] The adjustment unit 23 is specifically used to determine the difference obtained by subtracting the current infusion speed from the preset infusion speed as the speed error; determine the proportional term, integral term and differential term of the speed error based on the proportional coefficient, integral coefficient and differential coefficient; and calculate the speed adjustment amount based on the proportional term, integral term and differential term using a preset function.

[0114] The infusion speed regulation system also includes:

[0115] The fuzzy processing unit is used to determine the difference obtained by subtracting the current infusion speed from the preset infusion speed as a speed error; determine the rate of change of the speed error based on the speed error; convert the speed error and the rate of change of the speed error into a fuzzy set; call the fuzzy controller to perform reasoning based on the fuzzy set and preset fuzzy rules, and determine the fuzzy result output by the fuzzy controller; convert the fuzzy result into a speed compensation amount;

[0116] The determination unit 22 is specifically configured to adjust the preset infusion speed based on the speed compensation amount and the speed adjustment amount, and determine the adjusted target infusion speed.

[0117] The adjustment unit 23 is specifically used to set the sum obtained by adding the speed adjustment amount to the current infusion speed as the adjusted target infusion speed, so that after the infusion pump controls the peristaltic box to squeeze the infusion tube at the squeezing frequency corresponding to the target infusion speed, the liquid flow speed in the infusion tube is the preset infusion speed.

[0118] For an introduction to the infusion speed regulating system provided by the present invention, please refer to the above method embodiment, and the present invention will not be described in detail here.

[0119] Please refer to Figure 3 , Figure 3 This is a schematic diagram of the structure of an infusion speed regulating device provided in the present application, the device comprising:

[0120] A memory 31, used for storing computer programs;

[0121] The processor 32 is used to implement the steps of the above-mentioned infusion speed adjustment method when executing the computer program.

[0122] For an introduction to the infusion speed regulating device provided by the present invention, please refer to the above method embodiment, and the present invention will not be described in detail here.

[0123] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0124] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for adjusting the infusion speed, characterized in that: Applied to an infusion pump, the method comprises: Acquire the current infusion speed of the infusion tube; the current infusion speed is the flow speed of the liquid in the infusion tube after the infusion pump controls the peristaltic box to squeeze the infusion tube at an squeezing frequency corresponding to a preset infusion speed; determining a speed adjustment amount based on the current infusion speed and the preset infusion speed; The preset infusion speed is adjusted based on the speed adjustment amount to generate an adjusted target infusion speed, so that after the infusion pump controls the peristaltic box to squeeze the infusion tube at an extrusion frequency corresponding to the target infusion speed, the liquid flow speed in the infusion tube is the preset infusion speed.

2. The method for adjusting the infusion speed according to claim 1, characterized in that: Get the current infusion rate of the infusion tube, including: Obtaining the number of unit drops in the drip pot of the infusion tube per unit time; The current infusion rate is determined based on the unit drop number, the preset volume of each drop of liquid, and the unit time.

3. The method for adjusting the infusion speed according to claim 1, characterized in that: After obtaining the current infusion rate of the infusion tube, it also includes: Performing filtering on the current infusion speed; Determining a speed adjustment amount based on the current infusion speed and the preset infusion speed includes: The speed adjustment amount is determined based on the current infusion speed after filtering and the preset infusion speed.

4. The method for adjusting the infusion speed according to claim 3, characterized in that: The current infusion speed is filtered, including: Generate an estimated infusion speed value based on the historical infusion speed acquired at the last moment and the preset infusion speed; The current infusion speed after filtering is determined based on a preset estimated weight of the infusion speed estimate value and a preset actual weight of the current infusion speed.

5. The method for adjusting the infusion speed according to claim 1, characterized in that: Determining a speed adjustment amount based on the current infusion speed and the preset infusion speed includes: The speed adjustment amount is determined by subtracting the current infusion speed from the preset infusion speed.

6. The method for adjusting the infusion speed according to claim 1, characterized in that: Determining a speed adjustment amount based on the current infusion speed and the preset infusion speed includes: Determine the difference obtained by subtracting the current infusion speed from the preset infusion speed as a speed error; Determining a proportional term, an integral term, and a differential term of the velocity error based on a proportional coefficient, an integral coefficient, and a differential coefficient; The speed adjustment amount is calculated using a preset function based on the proportional term, the integral term, and the differential term.

7. The method for adjusting the infusion speed according to claim 6, characterized in that: Before determining the difference obtained by subtracting the current infusion speed from the preset infusion speed as the speed error, the method further includes: Determine the difference obtained by subtracting the current infusion speed from the preset infusion speed as a speed error; determining a rate of change of the velocity error based on the velocity error; converting the speed error and the rate of change of the speed error into fuzzy sets; Calling a fuzzy controller to perform reasoning based on the fuzzy set and preset fuzzy rules, and determining a fuzzy result output by the fuzzy controller; Converting the fuzzy result into a speed compensation amount; Adjusting the preset infusion speed based on the speed adjustment amount to determine the adjusted target infusion speed includes: The preset infusion speed is adjusted based on the speed compensation amount and the speed adjustment amount, and an adjusted target infusion speed is determined.

8. The method for adjusting the infusion speed according to any one of claims 1 to 7, characterized in that: The preset infusion speed is adjusted based on the speed adjustment amount to generate an adjusted target infusion speed, so that after the infusion pump controls the peristaltic box to squeeze the infusion tube at an squeezing frequency corresponding to the target infusion speed, the liquid flow speed in the infusion tube is the preset infusion speed, including: The sum obtained by adding the speed adjustment amount to the current infusion speed is set as the adjusted target infusion speed, so that after the infusion pump controls the peristaltic box to squeeze the infusion tube at the squeezing frequency corresponding to the target infusion speed, the liquid flow speed in the infusion tube is the preset infusion speed.

9. An infusion speed adjustment system, characterized in that: Applied to an infusion pump, the system comprises: An acquisition unit, used for acquiring a current infusion speed of the infusion tube; the current infusion speed is a flow speed of the liquid in the infusion tube after the infusion pump controls the peristaltic box to squeeze the infusion tube at an squeezing frequency corresponding to a preset infusion speed; a determining unit, configured to determine a speed adjustment amount based on the current infusion speed and the preset infusion speed; The adjustment unit is used to adjust the preset infusion speed based on the speed adjustment amount to generate an adjusted target infusion speed so that after the infusion pump controls the peristaltic box to squeeze the infusion tube at an extrusion frequency corresponding to the target infusion speed, the liquid flow speed in the infusion tube is the preset infusion speed.

10. An infusion speed regulating device, characterized in that: include: Memory for storing computer programs; A processor, used to implement the steps of the infusion speed adjustment method as described in any one of claims 1-8 when executing a computer program.

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