A method, system, and storage medium for improving the metering accuracy of a pump.

Abstract

This invention discloses a method, system, and storage medium for improving the quantitative dispensing accuracy of a pump. The method includes the following steps: S1: Inputting the pump's quantitative parameters into the system; S2: Acquiring the initial weight value of the liquid in the storage bottle and detecting the current weight value of the liquid in the storage bottle in real time, calculating the actual consumption of the liquid using the initial weight value and the current weight value; S3: Determining whether the set time in the input quantitative parameters is greater than the accuracy improvement base time; S4: Detecting the running time in real time and determining whether the running time is equal to the set time in the input quantitative parameters. The beneficial effects of this invention are that it forms a closed-loop control by calculating the actual flow rate of the second pump through the actual consumption and theoretical consumption, significantly improving the pump dispensing accuracy under timed and quantitative conditions; the actual accuracy of the pump will not decrease due to factors such as the pump's own accuracy, installation conditions, aging of pump pipes, and wear; it has low requirements for the pump's flow rate accuracy and does not overly rely on the pump's hardware performance.

Description

Technical Field

[0001] This invention relates to the field of liquid dispensing technology, and in particular to a method, system, and storage medium for improving the accuracy of pump dispensing. Background Technology

[0002] The precise quantitative dispensing of liquid reagents is crucial in many industries, particularly in the fields of biology, pharmaceuticals, food, and chemicals. Higher dispensing precision leads to better process consistency and ensures higher research and production quality. In more demanding applications, not only must the final dispensing volume be accurate, but the flow rate and timing must also be consistent (some quantitative dispensing processes only require a precise result, while others demand control over flow rate and time). This places higher demands on pump performance. However, higher flow rate precision pumps are more difficult to manufacture (and more expensive). Furthermore, factors such as aging and wear from prolonged pump operation can decrease dispensing precision, such as the aging and wear of the pump tubing in peristaltic pumps.

[0003] Chinese patent document CN114129814B, published on June 23, 2023, discloses a method for controlling the infusion accuracy of a pump-type infusion set. The pump-type infusion set includes an infusion pump assembly and an infusion device. The infusion device includes a storage container and an infusion set connected to the storage container. A high-precision analytical balance is used to analyze the infusion volume of the infusion set. Based on the univariate relationship between time, temperature, flow rate and infusion accuracy, a general model is constructed to obtain the control results of the infusion time, flow rate and temperature of the pump-type infusion set on the infusion accuracy.

[0004] The drawback of the above-mentioned pump-based infusion set for controlling infusion accuracy is that it relies on the univariate relationship between time, temperature, flow rate, and infusion accuracy to construct a general model of these factors. This model uses a high-precision analytical balance, making the model-building process complex and containing too many functions. This results in an overly complex infusion accuracy control process that consumes a lot of time and may even lead to situations where the processor cannot process the data in time. Consequently, it is difficult to apply this method to industrial production processes and necessitates the use of pumps with high hardware performance. Summary of the Invention

[0005] The purpose of this invention is to address the problem that existing methods for improving the quantitative dispensing accuracy of pumps rely excessively on the pump's hardware performance. This invention provides a method, system, and storage medium for improving the quantitative dispensing accuracy of pumps. Based on the read data, the system calculates and automatically adjusts the flow coefficient in real time, applying it to the pump's actual rotational speed to form a closed-loop control. This achieves the goal of continuously improving flow accuracy, and has the advantages of not overly relying on the pump's hardware performance and having a simple process for improving flow accuracy.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: First aspect: A method for improving the quantitative dispensing accuracy of a pump, comprising the following steps: S1: Inputting the quantitative parameters of the pump into the system and starting the system operation; S2: Collecting the initial weight value of the liquid in the storage bottle and detecting the current weight value of the liquid in the storage bottle in real time, and calculating the actual consumption of the liquid through the initial weight value and the current weight value; S3: Determining whether the set time in the input quantitative parameters is greater than the accuracy improvement base time. If so, real-time flow coefficient control is performed to improve the dispensing accuracy; if not, fixed flow coefficient control is performed; S4: Detecting the running time in real time and determining whether the running time is equal to the set time in the input quantitative parameters. If so, stopping the operation; if not, returning to step S3 to continue execution.

[0007] Using the technical solution of the first aspect mentioned above, when it is necessary to quantitatively add or extract liquid from the storage bottle, the quantitative parameters for this quantitative addition or extraction need to be input into the quantitative addition system first, and then the system is started. At the beginning of the system operation, the initial weight value of the liquid in the storage bottle is detected first, and then the set time in the quantitative parameters is read to see if it is greater than the accuracy improvement base time. If not, a fixed flow coefficient control is performed; if so, a real-time flow coefficient control is performed to improve the addition accuracy.

[0008] In the first aspect, preferably, the real-time flow coefficient control includes:

[0009] S3.1: Calculate the second flow coefficient:

[0010] S3.2: Read the set flow rate from the input quantitative parameters, and use the product of the second flow coefficient and the set flow rate as the actual flow rate of the second pump to control the actual speed of the pump;

[0011] S3.3: Real-time detection of running time, and determination of whether the running time is equal to the set time in the input quantitative parameters. If yes, stop running; otherwise, return to step S3.1 to continue execution.

[0012] In the first aspect, preferably, the calculation of the second flow coefficient includes: calculating the theoretical consumption of the liquid, reading the actual consumption of the liquid, and calculating the ratio of the theoretical consumption to the actual consumption as the second flow coefficient.

[0013] Specifically, when the set time in the quantitative parameters exceeds the accuracy improvement base time, real-time flow coefficient control is used. Real-time flow coefficient control acts as a closed-loop control. Since the quantitative parameters have been set previously, the theoretical liquid consumption is related to the running time. During control, the actual pump flow rate is calculated based on the first flow coefficient. During the process, the current weight of the liquid in the storage bottle is monitored in real time. Then, the actual liquid consumption is calculated using the current weight and initial weight of the liquid in the storage bottle. The ratio of theoretical to actual consumption is used as the second flow coefficient. The product of the second flow coefficient and the set flow rate is then calculated to obtain the actual pump flow rate. The pump speed is controlled based on the actual second pump flow rate. The current weight of the liquid in the storage bottle is monitored again, and the actual second pump flow rate is recalculated. Operation stops when the running time equals the set time in the input quantitative parameters. In this way, calculations are performed based on the read data, and the flow coefficient is automatically adjusted in real time, affecting the actual pump speed, thereby continuously improving flow accuracy.

[0014] In the first aspect, preferably, the actual consumption calculation method includes: detecting the current weight of the liquid in the storage bottle, and calculating the absolute value of the difference between the current weight and the initial weight of the liquid in the storage system as the actual consumption. Specifically, when quantitatively adding liquid to the storage bottle, the current weight of the liquid in the bottle increases, and the difference between the current weight and the initial weight of the liquid in the storage system is positive. When quantitatively extracting liquid from the storage bottle, the current weight of the liquid in the bottle decreases, and the difference between the current weight and the initial weight of the liquid in the storage system is negative. Therefore, the absolute value of the difference between the current weight and the initial weight of the liquid in the storage system is taken as the actual consumption. However, due to losses during the pump's adding or extracting process, the actual consumption will generally differ from the theoretical consumption. This closed-loop control, using the actual consumption and the theoretical consumption, significantly improves the pump's adding accuracy under timed and quantitative conditions.

[0015] In the first aspect, preferably, the accuracy enhancement base time is set according to the set time. Specifically, the accuracy enhancement base time is the minimum time for quantitative filling or extraction of the storage bottle that requires accuracy enhancement control, and it is set manually. Since the accuracy difference between quantitative filling or extraction of the storage bottle using fixed flow coefficient control and quantitative filling using real-time flow coefficient control is small when the time is short, and real-time flow coefficient control consumes more resources than fixed flow coefficient control, fixed flow coefficient control is used when the set time is not greater than the accuracy enhancement base time, and the accuracy enhancement base time changes proportionally with the size of the set time.

[0016] In the first aspect, preferably, the theoretical consumption calculation method includes: detecting the current running time and calculating the product of the current running time and the set flow rate as the theoretical consumption. Specifically, the theoretical consumption is the amount of liquid consumed when quantitatively adding or extracting liquid from the storage bottle according to the set flow rate during the current running time. Closed-loop control is performed on the quantitative adding or extracting of liquid from the storage bottle based on the theoretical consumption and the actual consumption, ensuring that the actual accuracy of the pump does not decrease due to factors such as the pump's inherent accuracy, installation conditions, aging or wear of the pump pipes.

[0017] In the first aspect, preferably, the fixed flow coefficient control includes calculating the actual flow rate of the first pump using a first flow coefficient to control the actual pump speed; the first flow coefficient is determined by the pump specifications. Specifically, the first flow coefficient is fixed for each pump, and pumps of the same specifications all have the same first flow coefficient. The actual flow rate of the first pump is calculated as the product of the first flow coefficient and the set flow rate. After calculating the actual flow rate of the first pump, the pump speed will be controlled according to the actual flow rate of the first pump until the set running time is reached. In this method, the control time using a fixed flow coefficient is short.

[0018] In the first aspect, preferably, the quantitative parameters include a set flow rate and a set time. Specifically, the set flow rate includes the total flow rate of liquid quantitatively added to or extracted from the storage bottle in this operation, and the set time includes the total duration of quantitative addition or extraction from the storage bottle in this operation.

[0019] In the first aspect, preferably, the real-time flow coefficient control is a closed-loop control. Specifically, during the process, the current weight of the liquid in the storage bottle is detected in real time. Then, the actual consumption of the liquid is calculated using the current weight and the initial weight of the liquid in the storage bottle. The ratio of the theoretical consumption to the actual consumption is used as the second flow coefficient. The product of the second flow coefficient and the set flow rate is then calculated to obtain the actual flow rate of the second pump. The rotation speed is controlled based on the actual flow rate of the second pump to achieve closed-loop control, ensuring that the actual accuracy of the pump does not decrease due to factors such as the pump's own accuracy, installation conditions, aging or wear of the pump pipes.

[0020] The second aspect: a system for improving the quantitative dispensing accuracy of a pump, applying the method for improving the quantitative dispensing accuracy of a pump as described in the first aspect, comprising: a storage bottle, a liquid carrier storing liquid, connected to a liquid pump for pumping or inputting liquid; a liquid pump, one end connected to the storage bottle and the other end connected to an external device, for inputting liquid into or extracting liquid from the storage bottle; a weighing module connected to the storage bottle, for acquiring the initial weight value of the liquid in the storage system and for detecting the current weight value of the liquid in the storage system in real time; and a processor module for storing the data obtained by the weighing module and for controlling the actual flow rate of the liquid pump through real-time flow coefficient control and fixed flow coefficient control, thereby controlling the actual speed of the pump.

[0021] Using the technical solution of the second aspect described above, quantitative filling or extraction of liquid from the storage bottle is performed. First, quantitative parameters are input into the pump quantitative filling accuracy improvement system. Then, the operation of the pump quantitative filling accuracy improvement system is started. The processor module in the pump quantitative filling accuracy improvement system determines whether to use real-time flow coefficient control or fixed flow coefficient control. If real-time flow coefficient control is used, the actual flow rate of the first pump is calculated based on the first flow coefficient to control the liquid pump. Then, the theoretical consumption is calculated. The ratio of the theoretical consumption to the actual consumption is used as the second flow coefficient. Then, the product of the second flow coefficient and the set flow rate is calculated to obtain the actual flow rate of the second pump. The rotation speed is controlled by the actual flow rate of the second pump. Then, the actual flow rate of the second pump is continuously updated to control the rotation speed. When the running time is equal to the set time in the input quantitative parameters, the operation stops.

[0022] Third aspect: A storage medium storing a computer program, wherein the computer program is configured to execute the method for improving the pump metering accuracy described in the first aspect when running.

[0023] This invention discloses a method, system, and storage medium for improving the quantitative dispensing accuracy of a pump. The method is applied to a system for improving the quantitative dispensing accuracy of a pump. First, a set flow rate and a set time are input into the system. Then, the system is started. The processor module in the system determines whether to use real-time flow coefficient control or fixed flow coefficient control. If real-time flow coefficient control is used, the actual flow rate of the first pump is calculated based on a first flow coefficient to control the pump. After the weighing module detects an increase in the current weight of the liquid in the storage system, it calculates the actual consumption of the liquid using the current weight and initial weight of the liquid in the storage bottle, and then calculates the theoretical consumption. The ratio of the theoretical consumption to the actual consumption is used as a second flow coefficient. The product of the second flow coefficient and the set flow rate is then calculated to obtain the actual flow rate of the second pump. The rotation speed is controlled by the actual flow rate of the second pump. The actual flow rate of the second pump is continuously updated to control the rotation speed. The system stops operating when the running time equals the set time in the input quantitative parameters, thereby continuously improving the flow accuracy.

[0024] The beneficial effects of this invention are that it calculates the actual flow rate of the second pump by combining the actual consumption and theoretical consumption to form a closed-loop control, which greatly improves the pump filling accuracy under timed and quantitative conditions; the actual accuracy of the pump will not decrease due to factors such as the pump's own accuracy, installation conditions, aging and wear of the pump pipe; the requirements for the pump's flow accuracy are low, and it does not overly rely on the pump's hardware performance.

[0025] Features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments. It should be emphasized that the term "comprising / including" as used herein refers to the presence of a feature, integral, step, or component, but does not exclude the presence or addition of one or more other features, integrals, steps, or components. Attached Figure Description

[0026] Figure 1 This is a flowchart of a method for improving the accuracy of pump quantitative dispensing according to the present invention;

[0027] Figure 2 This is a schematic diagram of the quantitative dispensing system for improving the quantitative dispensing accuracy of a pump according to the present invention;

[0028] Figure 3 This is a schematic diagram of the quantitative extraction of a pump quantitative dispensing accuracy improvement system according to the present invention;

[0029] Figure 4 This is a schematic diagram comparing the accuracy of the method for improving the pump metering accuracy of the present invention with that of conventional methods;

[0030] Figure 5 This is a schematic diagram comparing the long-term accuracy of the pump quantitative dispensing method of the present invention with that of conventional methods.

[0031] In the diagram: 1. Storage bottle; 2. Weighing module; 3. Liquid pump; 4. Pump pipe; 5. Liquid flow direction. Detailed Implementation

[0032] The specific implementation of the technical solution of the present invention will be further described below through examples and in conjunction with the accompanying drawings.

[0033] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0034] Example 1:

[0035] exist Figure 1 In Embodiment 1 shown, the present invention provides a technical solution: a method for improving the quantitative dispensing accuracy of a pump, comprising the following steps: S1: inputting the pump's quantitative parameters into the system and starting the system operation; S2: collecting the initial weight value of the liquid in the storage bottle and detecting the current weight value of the liquid in the storage bottle in real time, and calculating the actual consumption of the liquid using the initial weight value and the current weight value; S3: determining whether the set time in the input quantitative parameters is greater than the accuracy improvement base time; if so, performing real-time flow coefficient control to improve dispensing accuracy; if not, performing fixed flow coefficient control; S4: detecting the running time in real time and determining whether the running time is equal to the set time in the input quantitative parameters; if so, stopping the operation; if not, returning to step S3 to continue execution.

[0036] Figure 1 This is a flowchart illustrating a method for improving the metering accuracy of a pump according to the present invention. It details the specific process of this method and provides a concrete explanation of how to improve the metering accuracy of a pump. Figure 1 The flowchart shown includes the following steps S110 to S150.

[0037] Step S110: Input quantitative parameters and start system operation. In this embodiment, the quantitative parameters include setting the flow rate and setting the time. The setting flow rate includes the total flow rate of liquid to be quantitatively added or extracted from the storage bottle this time, and the setting time includes the total duration of quantitative addition or extraction from the storage bottle this time. After inputting the setting flow rate and setting time into the system, the system is started to quantitatively add or extract liquid from the storage bottle.

[0038] Step S120: Collect the initial weight value of the liquid. In this embodiment, the weighing module is connected to the liquid storage bottle, collects the initial weight value of the liquid in the liquid storage system, and records the collected initial weight value. The initial weight value is used to calculate the actual consumption of the liquid.

[0039] Step S130: Determine whether the set time is greater than the accuracy improvement base time. If yes, proceed to steps S131-S132; otherwise, proceed to steps S133-S135. In this embodiment, the accuracy improvement base time is set according to the set time. The accuracy improvement base time is the minimum time for quantitative filling or extraction of the storage bottle that requires accuracy improvement control, and it is set manually. Since the accuracy difference between quantitative filling or extraction of the storage bottle using fixed flow coefficient control and quantitative filling using real-time flow coefficient control is small when the time is short, and real-time flow coefficient control consumes more resources than fixed flow coefficient control, fixed flow coefficient control is used when the set time is not greater than the accuracy improvement base time. The accuracy improvement base time changes proportionally with the size of the set time. In this embodiment, the accuracy improvement base time is set to 1 minute.

[0040] Step S131: Read the first flow coefficient. In this embodiment, when it is determined in step S130 that the setting time is not greater than the accuracy improvement base time, fixed flow coefficient control is used, that is, step S131 is started. Fixed flow coefficient control includes using the first flow coefficient to calculate the actual flow rate of the first pump and controlling the actual speed of the pump. The first flow coefficient is determined by the pump specifications. The first flow coefficient is fixed for each pump, and the first flow coefficient of pumps of the same specifications is also the same.

[0041] Step S132: Calculate the actual flow rate of the first pump. In this embodiment, the actual flow rate of the first pump is calculated by multiplying the first flow coefficient by the set flow rate. After calculating the actual flow rate of the first pump, the pump speed will be controlled according to the actual flow rate of the first pump.

[0042] Step S133: Calculate the theoretical liquid consumption. In this embodiment, when the set time is greater than the accuracy improvement base time, real-time flow coefficient control is used, i.e., step S133 begins. The theoretical consumption is the amount of liquid consumed by quantitatively adding or extracting liquid from the storage bottle according to the set flow rate during the current running time. The theoretical consumption is calculated by: detecting the current running time, calculating the product of the current running time and the set flow rate as the theoretical consumption, and performing closed-loop control for quantitative adding or extracting liquid from the storage bottle based on the theoretical consumption and the actual consumption. Real-time flow coefficient control is a closed-loop control. During the process, the current weight of the liquid in the storage bottle is detected in real time, then the actual liquid consumption is calculated, the second flow coefficient is calculated, and then the actual flow rate of the second pump is calculated. The rotation speed is controlled based on the actual flow rate of the second pump to achieve closed-loop control, ensuring that the actual accuracy of the pump does not decrease due to factors such as the pump's own accuracy, installation conditions, aging or wear of the pump pipes.

[0043] Step S134: Read the actual amount of liquid consumed. In this embodiment, the actual consumption is calculated by: detecting the current weight of the liquid in the storage bottle, and calculating the absolute value of the difference between the current weight and the initial weight of the liquid in the storage system. When quantitatively adding liquid to the storage bottle, the current weight of the liquid increases, and the difference between the current weight and the initial weight of the liquid in the storage system is positive. When quantitatively extracting liquid from the storage bottle, the current weight of the liquid decreases, and the difference between the current weight and the initial weight of the liquid in the storage system is negative. Therefore, the absolute value of the difference between the current weight and the initial weight of the liquid in the storage system is taken as the actual consumption. However, due to losses during the adding or extracting process, the actual consumption will generally differ from the theoretical consumption.

[0044] Step S135: Calculate the actual flow rate of the second pump. In this embodiment, the theoretical consumption was calculated in step S133, and the actual consumption was calculated in step S134. Then, the ratio of the theoretical consumption to the actual consumption was calculated as the second flow coefficient. The product of the second flow coefficient and the set flow rate was then calculated to obtain the actual flow rate of the second pump. The rotation speed was controlled based on the actual flow rate of the second pump. Then, the current weight of the liquid in the storage bottle was detected again, and the actual flow rate of the second pump was recalculated, thereby achieving closed-loop control.

[0045] Step S140: Determine if the running time equals the set time. If yes, proceed to step S150. If no, if steps S131 to S132 were executed previously, return to step S131; if steps S133 to S135 were executed previously, return to step S133. In this embodiment, the set time is input in step S110, and the system monitors the running time in real time.

[0046] Step S150: End operation. In this embodiment, because the accuracy requirements for quantitative filling or extraction of the liquid storage bottle are extremely high, the operation is stopped immediately when the running time equals the set time.

[0047] The method for improving the quantitative dispensing accuracy of a pump designed in this invention offers several advantages. First, by inputting quantitative parameters, the system can perform precise quantitative dispensing or extraction operations based on the set flow rate and time. Second, by collecting the initial weight of the liquid and monitoring the current weight of the liquid in the storage bottle in real time, the actual liquid consumption can be accurately calculated, achieving closed-loop control. Furthermore, by selecting between fixed flow coefficient control and real-time flow coefficient control based on whether the set time exceeds the accuracy improvement baseline time, the system can meet accuracy requirements under different time conditions. Finally, when the running time equals the set time, the system immediately stops operating, ensuring accuracy. In summary, this method improves the accuracy of pump quantitative dispensing and guarantees operational precision.

[0048] Figure 4 This is a schematic diagram comparing the accuracy of the pump quantitative dispensing accuracy improvement method of the present invention with that of a conventional method. Quantitative dispensing of the storage bottle was performed using both the pump quantitative dispensing accuracy improvement method of this embodiment and the conventional method, with five dispensing operations performed for each. The input flow rate settings were increased sequentially to 30.0g, 60.0g, 90.0g, 150.0g, and 300.0g, respectively. The results are shown in the table below.

[0049]

[0050]

[0051] As can be seen from the table, as the set flow rate increases, the deviation value of the existing conventional method also increases, and the accuracy gradually decreases. However, the deviation value of the method in this embodiment always fluctuates directly between 0g and 0.6g, and the accuracy fluctuates between 0.0% and 0.22%. Compared with the conventional method, the accuracy of the method in this embodiment is much higher than that of the existing conventional method.

[0052] Figure 5 This diagram illustrates a long-term accuracy comparison between the pump metering accuracy improvement method of this invention and a conventional method. After long-term pump operation, the pump metering accuracy improvement method of this embodiment and the conventional method were used to meter the liquid in the storage bottle five times, with the input flow rate settings increasing sequentially to 30.0g, 60.0g, 90.0g, 150.0g, and 300.0g. The results are shown in the table below.

[0053]

[0054] Comparative data shows that after long-term use, the accuracy of the pump under conventional operating methods significantly decreases. The conventional filling control flowchart represents the control process under the existing operating method. During use, the required flow rate, time, and flow coefficient need to be input. After starting operation, the pump runs according to the set parameters, but the pump speed is not adjusted during the process, which is an open-loop control. The actual usage is uncontrollable due to factors such as the pump's own accuracy, installation conditions, aging and wear of the pump pipes, etc. As the set flow rate increases, the deviation value of the existing conventional operating method also increases, and the accuracy gradually decreases. In contrast, the deviation value of the method in this embodiment is smaller and the accuracy is higher than that of the conventional operating method. It can be seen that compared with the conventional operating method, the method used in this embodiment does not show the phenomenon of accuracy decrease caused by long-term use, aging and wear of the pump, and has good repeatability and good reproducibility.

[0055] The workflow of this embodiment of a method for improving the quantitative dispensing accuracy of a pump is as follows: First, quantitative parameters, namely the set flow rate and set time, are input into the system. Then, the system is started and it is determined whether to use real-time flow coefficient control or fixed flow coefficient control. If real-time flow coefficient control is used, the actual flow rate of the first pump is calculated based on the first flow coefficient for control. After detecting an increase in the current weight value of the liquid in the storage system, the actual consumption of the liquid is calculated by using the current weight value and the initial weight value of the liquid. Then, the theoretical consumption is calculated. The ratio of the theoretical consumption to the actual consumption is used as the second flow coefficient. Then, the product of the second flow coefficient and the set flow rate is calculated to obtain the actual flow rate of the second pump. The rotation speed is controlled by the actual flow rate of the second pump. Then, the actual flow rate of the second pump is continuously updated to control the rotation speed. When the running time is equal to the set time in the input quantitative parameters, the operation is stopped.

[0056] Example 2:

[0057] exist Figures 2 to 3 In Embodiment 2 shown, the present invention provides a technical solution: a pump metering accuracy improvement system, applying a pump metering accuracy improvement method according to Embodiment 1, comprising: a storage bottle, a liquid carrier storing liquid, connected to a liquid pump for pumping or inputting liquid; a liquid pump, one end connected to the storage bottle and the other end connected to an external device, for inputting liquid into or extracting liquid from the storage bottle; a weighing module connected to the storage bottle, for collecting the initial weight value of the liquid in the storage system and for detecting the current weight value of the liquid in the storage system in real time; and a processor module for storing the data obtained by the weighing module and for controlling the actual flow rate of the liquid pump through real-time flow coefficient control and fixed flow coefficient control, thereby controlling the actual speed of the pump.

[0058] Figure 2This is a schematic diagram of the quantitative dispensing system for improving the accuracy of pump quantitative dispensing according to the present invention. Figure 3 This is a schematic diagram of the quantitative extraction process of a pump quantitative dispensing accuracy improvement system according to the present invention, as shown below. Figure 2 and Figure 3 As shown, in this embodiment, the system for improving the accuracy of pump metering includes a storage bottle 1, a weighing module 2, a liquid pump 3, and a pump pipe 4. The weighing module 2 used in this embodiment is a weighing sensor. The weighing sensor has a fast data acquisition speed and can detect the weight of the liquid in the storage bottle in real time.

[0059] In this embodiment, as Figure 2 The diagram illustrates the quantitative dispensing process. Storage bottle 1 holds the liquid reagent. A weighing sensor continuously monitors the weight of the liquid reagent in storage bottle 1 and feeds it back to the processor module. The processor module continuously optimizes and controls the actual rotation speed of the liquid pump 3 using the pump quantitative dispensing accuracy improvement method described in Example 1, thereby improving its flow accuracy. During this process, the liquid pump 3 delivers the liquid reagent from the front-end space to storage bottle 1 through the connected pump pipe 4 in the liquid flow direction 5 until the set quantitative value is reached.

[0060] In this embodiment, as Figure 3 The diagram illustrates the quantitative extraction process. Storage bottle 1 holds the liquid reagent. A weighing sensor continuously monitors the weight of the liquid reagent in storage bottle 1 and feeds it back to the processor module. The processor module continuously optimizes and controls the actual rotation speed of the liquid pump 3 using the pump quantitative dispensing accuracy improvement method described in Example 1, thereby improving its flow accuracy. During this process, the liquid pump 3 delivers the liquid reagent from storage bottle 1 to the rear space via the connected pump pipe 4 according to the liquid flow direction 5, until the set quantitative value is reached.

[0061] This embodiment also includes a storage medium storing a computer program, wherein the computer program is configured to execute the method for improving the pump metering accuracy described in Embodiment 1 when running.

[0062] This embodiment discloses a method, system, and storage medium for improving the quantitative dispensing accuracy of a pump. The method is applied to a system for improving the quantitative dispensing accuracy of a pump. First, a set flow rate and a set time are input into the system. Then, the system is started. The processor module in the system determines whether to use real-time flow coefficient control or fixed flow coefficient control. If real-time flow coefficient control is used, the actual flow rate of the first pump is calculated based on a first flow coefficient to control the pump. After the weighing module detects an increase in the current weight of the liquid in the storage system, it calculates the actual consumption of the liquid using the current weight and initial weight of the liquid in the storage bottle. Then, the theoretical consumption is calculated. The ratio of the theoretical consumption to the actual consumption is used as the second flow coefficient. The product of the second flow coefficient and the set flow rate is then calculated to obtain the actual flow rate of the second pump. The rotation speed is controlled by the actual flow rate of the second pump. The actual flow rate of the second pump is continuously updated to control the rotation speed. When the running time equals the set time in the input quantitative parameters, the system stops running, thereby continuously improving the flow accuracy.

[0063] The beneficial effects of the present invention, a method, system, and storage medium for improving the quantitative dispensing accuracy of a pump, are as follows: by calculating the actual flow rate of the second pump through actual consumption and theoretical consumption to form a closed-loop control, the pump dispensing accuracy under timed and quantitative conditions is greatly improved; because the actual flow rate of the second pump is calculated in real time, the actual accuracy of the pump will not decrease due to factors such as the pump's own accuracy, installation conditions, aging or wear of the pump pipe; the requirements for the pump's flow rate accuracy are low, and it does not overly rely on the pump's hardware performance.

[0064] In summary, this invention presents a method, system, and storage medium for improving the accuracy of pump metering. The method improves metering accuracy by inputting metering parameters, collecting liquid weight values, selecting a flow control mode based on a set time, and adjusting the pump speed in real time. The system includes a storage bottle, a weighing module, a pump, and a processor module. Real-time flow control and fixed flow control are used to improve the actual accuracy of the pump. The method and system of this invention can be widely applied to various scenarios requiring metering, providing higher metering accuracy and stability. Accurate metering operation, real-time monitoring of liquid consumption, a closed-loop control system, and selection of an appropriate flow control mode significantly improve the pump's accuracy and stability. Test results from the embodiments show that, compared to conventional methods, the method of this invention has higher accuracy and repeatability under different flow settings, and the accuracy remains stable even after long-term use. In conclusion, this invention provides an effective method and system for improving the accuracy of pump metering, as well as a corresponding storage medium, which can be widely applied to various fields requiring precise metering.

[0065] Although this document uses terms such as liquid pump, liquid storage bottle, weighing module, and pump pipe frequently, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A method for improving the accuracy of pump metering, characterized in that, Includes the following steps: S1: Input the pump's metering parameters into the system and start the system operation; S2: Collect the initial weight value of the liquid in the storage bottle and detect the current weight value of the liquid in the storage bottle in real time. Calculate the actual amount of liquid consumed based on the initial weight value and the current weight value. The ratio of theoretical consumption to actual consumption is calculated as the second flow coefficient. The set flow rate in the input quantitative parameters is read. The product of the second flow coefficient and the set flow rate is used as the actual flow rate of the second pump. The actual speed of the pump is controlled. The running time is detected in real time, and it is determined whether the running time is equal to the set time in the input quantitative parameters. If yes, the operation is stopped. If no, the calculation of the second flow coefficient is returned and the operation continues. S3: Determine whether the set time in the input quantitative parameter is greater than the accuracy improvement base time. If yes, then perform real-time flow coefficient control to improve the filling accuracy; otherwise, perform fixed flow coefficient control. S4: Real-time detection of running time, and determination of whether the running time is equal to the set time in the input quantitative parameter. If yes, stop running; otherwise, return to step S3 to continue execution.

2. The method for improving the pump metering accuracy according to claim 1, characterized in that, The real-time flow coefficient control includes: S3.1: Calculate the second flow coefficient: S3.2: Read the set flow rate from the input quantitative parameters, and use the product of the second flow coefficient and the set flow rate as the actual flow rate of the second pump to control the actual speed of the pump; S3.3: Real-time detection of running time, and determination of whether the running time is equal to the set time in the input quantitative parameters. If yes, stop running; otherwise, return to step S3.1 to continue execution.

3. The method for improving the pump metering accuracy according to claim 2, characterized in that, The calculation of the second flow coefficient includes: calculating the theoretical consumption of the liquid, reading the actual consumption of the liquid, and calculating the ratio of the theoretical consumption to the actual consumption as the second flow coefficient.

4. The method for improving the pump metering accuracy according to claim 3, characterized in that, The method for calculating the actual consumption includes: detecting the current weight of the liquid in the storage bottle, and calculating the absolute value of the difference between the current weight and the initial weight of the liquid in the storage system, which is the actual consumption.

5. The method for improving the pump metering accuracy according to claim 1, characterized in that, The accuracy improvement base time is set according to the set time.

6. The method for improving the pump metering accuracy according to claim 3, characterized in that, The theoretical consumption calculation method includes: detecting the current running time, and calculating the product of the current running time and the set flow rate as the theoretical consumption.

7. The method for improving the pump metering accuracy according to claim 1, characterized in that, The fixed flow coefficient control includes using a first flow coefficient to calculate the actual flow rate of the first pump and controlling the actual speed of the pump. The first flow coefficient is determined by the pump specifications.

8. The method for improving the pump metering accuracy according to claim 1 or 2, characterized in that, The quantitative parameters include setting the flow rate and setting the time.

9. A system for improving the accuracy of pump metering dispensing, employing a method for improving the accuracy of pump metering dispensing according to any one of claims 1 to 8, characterized in that, include: A liquid storage bottle is a container for storing liquid and is connected to a liquid pump for drawing or introducing liquid. A liquid pump, with one end connected to a storage bottle and the other end connected to an external device, inputs liquid into the storage bottle or extracts liquid from the storage bottle; The weighing module is connected to the liquid storage bottle to collect the initial weight value of the liquid in the liquid storage system and to detect the current weight value of the liquid in the liquid storage system in real time. The processor module stores the data obtained from the weighing module and controls the actual flow rate of the liquid pump through real-time flow coefficient control and fixed flow coefficient control, thereby controlling the actual speed of the pump.

10. A storage medium, characterized in that, The storage medium stores a computer program, wherein the computer program is configured to execute, when running, the method for improving the pump metering accuracy according to any one of claims 1 to 8.

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