Flow regulation system and method of pneumoperitoneum machine

Abstract

The invention relates to the technical field of medical instruments, and particularly discloses a flow adjusting system and method.The system comprises a pneumoperitoneum machine body, an air supply pipeline used for supplying air is arranged in the pneumoperitoneum machine body, and the outlet end of the air supply pipeline is connected with a pneumoperitoneum pipe; the air supply pipeline is provided with a flow adjusting assembly used for adjusting the air output flow of the air supply pipeline and a flow sensor used for collecting output flow information output by the air supply pipeline. The controller is used for driving the flow adjusting assembly to adjust the flow of the pneumoperitoneum tube according to the output flow information in the stable state and the target flow information when the output flow information is in the stable state; the output flow information in the stable state can accurately represent the flow of the pneumoperitoneum tube in the normal state, so that the flow adjusting process of the pneumoperitoneum tube is completed smoothly, accurately and efficiently.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a flow regulation system and method for a pneumoperitoneum machine. Background Art

[0002] As an important device in modern surgical operations, the core function of the pneumoperitoneum machine is to establish and maintain the pneumoperitoneum state by injecting gas into the patient's abdominal cavity, thereby providing surgeons with a clear surgical field of view and operating space. In this process, the control of the gas flow output by the pneumoperitoneum tube is crucial, as it is directly related to the smooth progress of the operation and the safety of the patient.

[0003] However, in the existing insufflator flow regulation mechanism, the start and stop actions of commonly used flow regulation components, such as proportional valves, are often accompanied by instantaneous fluctuations in flow. This fluctuation not only affects the precise control of gas flow, but may also lead to the need for frequent flow adjustment during surgery, thereby increasing the complexity and uncertainty of the surgery.

[0004] Specifically, when the proportional valve is opened or closed, due to the inertia of gas flow and the rapid change of internal pressure of the system, the actual output gas flow is often difficult to quickly and stably reach the preset value. This instability not only reduces the accuracy of the operation, but also may cause unnecessary interference to the patient's physiological state.

[0005] There is currently no effective technical solution to the above problems. Summary of the invention

[0006] The purpose of the present application is to provide a flow regulation system and method for an insufflator, so as to smoothly, accurately and efficiently complete the flow regulation of the insufflator tube.

[0007] In a first aspect, the present application provides a flow regulation system for an insufflator, which is used to regulate the flow of an insufflator tube, and the regulation system comprises: The insufflator body is provided with an air supply pipeline for supplying air, the outlet end of the air supply pipeline is connected to an insufflator tube, the air supply pipeline is provided with a flow regulating component for regulating the gas output flow of the air supply pipeline, and a flow sensor for collecting output flow information output by the air supply pipeline; A controller, configured to calculate and obtain average fluctuation rate information about the flow rate according to the output flow rate information, and determine whether the output flow rate information is in a stable state based on the average fluctuation rate information; The controller is also used to drive the flow regulating component to regulate the flow of the pneumoperitoneum tube according to the output flow information and the target flow information in the stable state when the output flow information is in a stable state.

[0008] The flow regulation system of the pneumoperitoneum machine of the present application utilizes a controller to continuously calculate and obtain average volatility information based on the output flow information, so as to screen out output flow information with fluctuations based on the average volatility information, and then drive the flow regulation component to adjust the flow of the pneumoperitoneum tube based on the latest output flow information in a stable state. The output flow information in a stable state can accurately characterize the flow of the pneumoperitoneum tube in a normal state, so as to smoothly, accurately and efficiently complete the flow regulation process of the pneumoperitoneum tube.

[0009] In a second aspect, the present application further provides a flow regulation method for an insufflator, which is used to regulate the flow of an insufflator tube. The method is applied to a flow regulation system of an insufflator, and the flow regulation system of an insufflator comprises: The insufflator body is provided with an air supply pipeline for supplying air, the outlet end of the air supply pipeline is connected to an insufflator tube, the air supply pipeline is provided with a flow regulating component for regulating the gas output flow of the air supply pipeline, and a flow sensor for collecting output flow information output by the air supply pipeline; The method comprises the following steps: S1. Calculating and acquiring average fluctuation rate information about the flow according to the output flow information, and judging whether the output flow information is in a stable state based on the average fluctuation rate information; S2. When the output flow information is in a stable state, the flow regulating component is driven to regulate the flow of the pneumoperitoneum tube according to the output flow information and the target flow information in the stable state.

[0010] The flow regulation method of the pneumoperitoneum machine of the present application continuously calculates and obtains average volatility information based on the output flow information, so as to screen out the output flow information with fluctuations based on the average volatility information, and then drives the flow regulation component to adjust the flow of the pneumoperitoneum tube according to the latest output flow information in a stable state. The output flow information in a stable state can accurately characterize the flow of the pneumoperitoneum tube in a normal state, so as to smoothly, accurately and efficiently complete the flow regulation process of the pneumoperitoneum tube.

[0011] The flow regulation method of the pneumoperitoneum machine, wherein the step of calculating and obtaining the average fluctuation rate information about the flow based on the output flow information is to calculate the average fluctuation rate information about the flow based on the output flow information within the collection time period based on a time window of a preset length.

[0012] The flow sensor collects output flow information based on a preset collection frequency, and intercepts the output flow information based on a time window to ensure that the amount of output flow information for calculating the average volatility information each time is consistent, so that the calculated average volatility information is representative and accurate.

[0013] In the flow regulation method of the pneumoperitoneum machine, the average fluctuation rate information is calculated based on the standard deviation.

[0014] The standard deviation is an important indicator to measure the degree of dispersion of a data set. Its calculation is based on the arithmetic square root of the variance, which can intuitively reflect the fluctuation of the output flow information, realize the standardized comparison of the output flow information, and has the advantage of high sensitivity.

[0015] The flow rate regulation method of the pneumoperitoneum machine, wherein the average fluctuation rate information is calculated based on the following formula: ; Among them, σ is the average volatility information, N is the total number of output flow information collected during the collection period, and X i is the output flow information collected for the ith time within the collection period, and μ is the mean value of the output flow information within the collection period.

[0016] The flow rate regulation method of the pneumoperitoneum machine, wherein the step of driving the flow rate regulation component to regulate the flow rate of the pneumoperitoneum tube according to the output flow rate information and the target flow rate information in a stable state comprises: It is determined whether the deviation between the output flow information and the target flow information in the stable state is greater than a preset threshold value, and if so, the flow regulating component is driven to regulate the flow of the pneumoperitoneum tube based on dichotomy.

[0017] The flow rate regulation method of the pneumoperitoneum machine, wherein the step of driving the flow rate regulation component to regulate the flow rate of the pneumoperitoneum tube based on dichotomy comprises: A1. Obtain the upper limit and lower limit of the preset adjustment range; A2. Determine the reference regulating flow rate based on the upper and lower limits of the regulating interval; A3, driving the flow regulating component to regulate the flow of the pneumoperitoneum tube according to the reference regulating flow; A4, determining whether the deviation between the output flow information and the target flow information in the stable state after the adjustment is completed is less than or equal to the preset threshold, if yes, then the adjustment is terminated, otherwise, executing step A5; A5. According to the relationship between the reference adjustment flow and the target flow information, assign the value of the reference adjustment flow to the upper limit or lower limit of the adjustment interval, and then return to step A2.

[0018] In the flow regulation method of the pneumoperitoneum machine, step A2 is to calculate and determine the reference regulation flow based on the following formula: ; Among them, Fa is the reference regulation flow, F max and F min are the upper limit and lower limit of the adjustment range respectively.

[0019] The flow rate regulating method of the pneumoperitoneum machine, wherein the flow rate regulating component comprises a proportional valve; Step A3 includes: A31, determining a regulating voltage step value of the proportional valve based on a deviation between the reference regulating flow and the output flow information in the most recent stable state and a preset mapping relationship; A32. Based on the adjustment voltage step value, change the opening of the proportional valve according to the reference adjustment flow to adjust the flow of the pneumoperitoneum tube.

[0020] The flow rate regulation method of the pneumoperitoneum machine, wherein the mapping relationship includes: ; Wherein, Vs (dF) is the regulating voltage step value, and dF is the deviation between the reference regulating flow and the output flow information in the most recent stable state.

[0021] From the above, it can be seen that the present application provides a flow regulation system and method for an insuffloscope, wherein the flow regulation system of the insuffloscope of the present application utilizes a controller to continuously calculate and obtain average volatility information based on output flow information, so as to filter out output flow information with fluctuations based on the average volatility information, and then drive the flow regulation component to adjust the flow of the insuffloscope according to the latest output flow information in a stable state. The output flow information in a stable state can accurately characterize the flow of the insuffloscope under a normal state, so as to smoothly, accurately and efficiently complete the flow regulation process of the insuffloscope. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic structural diagram of the flow regulation system of the pneumoperitoneum machine provided in an embodiment of the present application.

[0023] Figure 2 A flow chart of a flow regulation method for an insufflator provided in an embodiment of the present application.

[0024] Figure 3 This is a schematic diagram of the relationship between the proportional valve control voltage and output flow information.

[0025] Figure numerals: 1. Insufflator body; 2. Air supply pipeline; 3. Insufflator tube; 4. Flow regulating component; 5. Flow sensor; 6. Pressure detection component; 7. Exhaust valve; 8. Controller. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0027] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0028] First, please refer to Figure 1 Some embodiments of the present application provide a flow regulation system for a pneumoperitoneum machine, which is used to regulate the flow of a pneumoperitoneum tube 3, and the system includes: The insufflator body 1 is provided with an air supply pipeline 2 for supplying air, the outlet end of the air supply pipeline 2 is connected with an insufflator tube 3, the air supply pipeline 2 is provided with a flow regulating component 4 for regulating the gas output flow of the air supply pipeline 2, and a flow sensor 5 for collecting output flow information output by the air supply pipeline 2; The controller 8 is used to calculate and obtain average fluctuation rate information about the flow according to the output flow information, and determine whether the output flow information is in a stable state based on the average fluctuation rate information; The controller 8 is also used to drive the flow regulating component 4 to regulate the flow of the pneumoperitoneum tube 3 according to the output flow information and the target flow information in the stable state when the output flow information is in a stable state.

[0029] Specifically, the pneumoperitoneum machine is used to deliver gas to the patient's abdomen through the pneumoperitoneum tube 3 to establish pneumoperitoneum. The inlet end of the gas supply pipe 2 is connected to a gas supply component (not shown in the figure), and the flow regulating component 4 is used to adjust the flow of the output gas of the gas supply pipe 2, thereby changing the gas delivery rate of the pneumoperitoneum tube 3 to adjust the speed of establishing pneumoperitoneum or maintain the pneumoperitoneum state, etc.; wherein, the flow sensor 5 is arranged on the pipe section of the gas supply pipe 2 between the flow regulating component 4 and the pneumoperitoneum tube 3, and the output flow information collected by it actually also represents the flow of the pneumoperitoneum tube 3.

[0030] More specifically, in actual operation, the flow of the pneumoperitoneum tube 3 may fluctuate. For example, the flow of the pneumoperitoneum tube 3 may fluctuate in a short period of time due to the bending of the pneumoperitoneum tube 3 and the opening and closing of the flow regulating component 4. In these cases, the output flow information collected by the flow sensor 5 cannot effectively represent the flow of the pneumoperitoneum tube 3 under normal conditions. Existing flow regulating means generally use PID or PWM to control the flow. These control methods all perform flow regulation in a real-time feedback manner. Flow regulation based on the fluctuating output flow information may lead to inaccurate flow regulation, long regulation cycle and even frequent flow fluctuations.

[0031] More specifically, in the embodiment of the present application, the controller 8 continuously obtains the output flow information collected by the flow sensor 5, and calculates the average volatility information about the flow based on the multiple output flow information collected recently. The average volatility information can be numerical data including mean square deviation, maximum deviation, standard deviation, etc. that can describe the change differences of multiple data. Therefore, the average volatility information can characterize the fluctuation intensity of the flow of the pneumoperitoneum tube 3 in the recent time. Therefore, it is possible to determine whether the current latest output flow information is in a stable state by judging the size of the average volatility information. Among them, the output flow information being in a stable state means that the value of the output flow information has not experienced the above-mentioned fluctuation problem in the recent time, and can accurately and effectively characterize the flow of the pneumoperitoneum tube 3 under normal conditions.

[0032] More specifically, in the embodiment of the present application, the controller 8 will only adjust the flow of the pneumoperitoneum tube 3 based on the output flow information under a stable state, that is, it will discard the fluctuating output flow information and then perform flow adjustment. This can effectively avoid the problems of inaccurate flow regulation, long adjustment cycle and even frequent flow fluctuations caused by the fluctuation of the flow of the pneumoperitoneum tube 3.

[0033] The flow regulation system of the pneumoperitoneum machine in the embodiment of the present application utilizes the controller 8 to continuously calculate and obtain the average volatility information based on the output flow information, so as to filter out the output flow information with fluctuations based on the average volatility information, and then drive the flow regulation component 4 to adjust the flow of the pneumoperitoneum tube 3 based on the latest output flow information in a stable state. The output flow information in a stable state can accurately represent the flow of the pneumoperitoneum tube 3 in a normal state, so as to smoothly, accurately and efficiently complete the flow regulation process of the pneumoperitoneum tube 3.

[0034] In some preferred embodiments, the air supply pipeline 2 is further provided with a pressure detection component 6 for triggering the controller 8 to generate an alarm message when the air pressure in the output end of the air supply pipeline 2 is abnormal.

[0035] Specifically, pressure detection is particularly important for insufflator products. A pressure detection component 6 is arranged on the air supply pipe 2 to detect the air pressure information in the pipe 2 in real time, so that the controller 8 can judge whether the air supply pipe 2 has leakage or blockage problems in real time according to the air pressure information in the pipe, and generate an alarm message when the air pressure information shows an abnormal air pressure. The alarm message includes fault information for prompting the user that there is a problem with the insufflator and / or shutdown information that triggers the insufflator to stop operating.

[0036] More specifically, the pressure detection component 6 is preferably arranged between the flow sensor 5 and the pneumoperitoneum tube 3 .

[0037] In some preferred embodiments, the pressure detection assembly 6 includes a primary pressure sensor and a secondary pressure sensor.

[0038] Specifically, the flow regulation system of the insufflator in the embodiment of the present application is equipped with a main pressure sensor and a secondary pressure sensor to achieve secondary verification of pressure information. The controller 8 preferably performs pressure detection through the air pressure information collected by the main pressure sensor. When the air pressure information collected by the main pressure sensor is abnormal, the controller 8 generates fault information to prompt the user that there is a problem with the insufflator, and performs pressure verification based on the air pressure information collected by the secondary pressure sensor.

[0039] In some preferred embodiments, the air supply pipeline 2 is further provided with an exhaust valve 7 for exhausting and relieving pressure on the pneumoperitoneum tube 3 .

[0040] Specifically, the exhaust valve 7 is used to exhaust the insufflature tube 3, so that when the insufflature is over-pressured, the pressure can be released through the exhaust valve 7 to meet the use requirements of the insufflature machine.

[0041] More specifically, the exhaust valve 7 is preferably arranged in parallel with the flow sensor 5 .

[0042] It should be noted that the flow regulating component 4 , the flow sensor 5 , the pressure detecting component 6 and the exhaust valve 7 are all electrically connected to the controller 8 .

[0043] Second, please refer to Figure 2 and Figure 3 Some embodiments of the present application further provide a flow regulation method for an insufflator, which is used to regulate the flow of an insufflator tube 3. The method is applied in a flow regulation system of an insufflator, and the flow regulation system of an insufflator includes: The insufflator body 1 is provided with an air supply pipeline 2 for supplying air, the outlet end of the air supply pipeline 2 is connected with an insufflator tube 3, the air supply pipeline 2 is provided with a flow regulating component 4 for regulating the gas output flow of the air supply pipeline 2, and a flow sensor 5 for collecting output flow information output by the air supply pipeline 2; The method comprises the following steps: S1. Calculate and obtain average fluctuation rate information about the flow according to the output flow information, and determine whether the output flow information is in a stable state based on the average fluctuation rate information; S2. When the output flow information is in a stable state, the flow regulating component 4 is driven to regulate the flow of the pneumoperitoneum tube 3 according to the output flow information and the target flow information in the stable state.

[0044] Specifically, the flow regulation method of the insufflator of the embodiment of the present application is applied to the flow regulation system of the insufflator, which may be the execution logic of the controller 8 of the flow regulation system of the insufflator.

[0045] It should be noted that the process of driving the flow regulating component 4 to regulate the flow of the pneumoperitoneum tube 3 may be a process of changing the flow of the pneumoperitoneum tube 3 or a process of maintaining the flow of the pneumoperitoneum tube 3 unchanged.

[0046] The flow regulation method of the pneumoperitoneum machine in the embodiment of the present application continuously calculates and obtains the average volatility information based on the output flow information, so as to screen out the output flow information with fluctuations based on the average volatility information, and then drives the flow regulation component 4 to adjust the flow of the pneumoperitoneum tube 3 according to the latest output flow information in a stable state. The output flow information in a stable state can accurately characterize the flow of the pneumoperitoneum tube 3 in a normal state, so as to smoothly, accurately and efficiently complete the flow regulation process of the pneumoperitoneum tube 3.

[0047] In some preferred embodiments, the step of calculating and obtaining average fluctuation rate information about the flow rate based on the output flow rate information is to calculate the average fluctuation rate information about the flow rate by intercepting the output flow rate information within the collection time period based on a time window of a preset length.

[0048] Specifically, the collection duration is the length of the time window. The flow sensor 5 collects output flow information based on a preset collection frequency. Intercepting the output flow information based on the time window can ensure that the amount of output flow information for calculating the average volatility information each time is consistent, so that the calculated average volatility information is representative and accurate.

[0049] More specifically, the output flow information within the collection time period intercepted based on a time window of preset length can be continuously intercepted based on the time window for multiple latest output flow information to calculate the average volatility information, or it can be intermittently intercepted based on the time window based on the length of the time window as the interception interval to calculate the average volatility information. The former can ensure the real-time nature of data analysis, and the latter can reduce the computing load, and can be selected according to the use requirements of the pneumoperitoneum machine.

[0050] More specifically, the set length of the time window is determined according to the acquisition frequency of the sensor and the regulation efficiency requirements of the pneumoperitoneum machine, and it is necessary to ensure that the number of samples of the output flow information used to calculate the average volatility information is sufficient and will not affect the timeliness of the pneumoperitoneum tube regulating flow.

[0051] In some preferred embodiments, the average volatility information is calculated based on the standard deviation.

[0052] Specifically, the standard deviation is an important indicator to measure the degree of dispersion of a data set. Its calculation is based on the arithmetic square root of the variance (i.e., the sum of the squares of the differences between each data set and the mean value divided by the number of data). It can intuitively reflect the fluctuations in the output flow information, realize the standardized comparison of the output flow information, and has the advantage of high sensitivity.

[0053] In some preferred embodiments, the average volatility information is calculated based on the following formula: (1) Among them, σ is the average volatility information, N is the total number of output flow information collected during the collection period, and X i is the output flow information collected for the ith time within the collection period, and μ is the mean value of the output flow information within the collection period.

[0054] Specifically, N is determined by the length of the time window and the acquisition frequency of the flow sensor 5. In the embodiment of the present application, N is preferably 5-15.

[0055] More specifically, the average volatility information calculated based on the above formula can reflect the comprehensive difference between each output flow information within the most recent preset time period (time window) and the average of the output flow information within the preset time period. The larger the value, the greater the fluctuation intensity of the output flow information within the preset time period. A large fluctuation amplitude of the output flow information and a large number of fluctuations will lead to a significant increase in the average volatility information. Therefore, the average volatility information calculated based on formula (1) can intuitively reflect whether the flow of the pneumoperitoneum tube 3 fluctuates and the intensity of the fluctuation. In the embodiment of the present application, step S1 can set a preset fluctuation threshold and compare it with the average volatility information to conveniently determine whether the output flow information is in a stable state.

[0056] In some preferred embodiments, the step of driving the flow regulating component 4 to adjust the flow of the pneumoperitoneum tube 3 according to the output flow information and the target flow information in a stable state includes: It is determined whether the deviation between the output flow information and the target flow information in a stable state is greater than a preset threshold value. If yes, the flow regulating component 4 is driven to regulate the flow of the pneumoperitoneum tube 3 based on the dichotomy method.

[0057] Specifically, the adjustment process in step S2 can be a process of changing the flow of the pneumoperitoneum tube 3, or a process of maintaining the flow of the pneumoperitoneum tube 3 unchanged; wherein, if the deviation between the output flow information and the target flow information is less than or equal to a preset threshold value, the process of driving the flow adjustment component 4 to adjust the flow of the pneumoperitoneum tube 3 based on the dichotomy can be skipped to maintain the flow of the pneumoperitoneum tube 3 unchanged, and continue to obtain the output flow information to calculate the average volatility information to continue to monitor the output flow information.

[0058] More specifically, the target flow information is the flow value that should be reached at the location of the flow sensor 5 to meet the current required usage state of the pneumoperitoneum tube 3, which can be set according to the user's usage requirements.

[0059] More specifically, the flow regulation method of the pneumoperitoneum machine in the embodiment of the present application performs flow regulation of the pneumoperitoneum tube 3 based on the binary method. The algorithm complexity of the binary method is O(logn), which is only higher than the constant order O(1), and has the characteristics of efficient regulation.

[0060] In some preferred embodiments, the step of driving the flow regulating component 4 to regulate the flow of the pneumoperitoneum tube 3 based on the dichotomy method includes: A1. Obtain the upper limit and lower limit of the preset adjustment range; A2. Determine the reference regulating flow rate based on the upper and lower limits of the regulating interval; A3, driving the flow regulating component 4 to regulate the flow of the pneumoperitoneum tube 3 according to the reference regulating flow; A4, determining whether the deviation between the output flow information and the target flow information in the stable state after the adjustment is completed is less than or equal to the preset threshold, if yes, then the adjustment is terminated, otherwise, executing step A5; A5. According to the relationship between the reference adjustment flow and the target flow information, the value of the reference adjustment flow is assigned to the upper limit or lower limit of the adjustment interval, and then return to step A2.

[0061] Specifically, in step A5, if the baseline adjustment flow is greater than the target flow information, the value of the baseline adjustment flow is assigned to the upper limit of the adjustment interval to form a new adjustment interval, so that the upper limit of the adjustment interval is closer to the target flow information, and thus the baseline adjustment flow determined based on the upper and lower limits of the adjustment interval in the next stage is closer to the target flow information; if the baseline adjustment flow is less than the target flow information, the value of the baseline adjustment flow is assigned to the lower limit of the adjustment interval to form a new adjustment interval, so that the lower limit of the adjustment interval is closer to the target flow information, and thus the baseline adjustment flow determined based on the upper and lower limits of the adjustment interval in the next stage is closer to the target flow information; this processing method gradually realizes the binary division of the adjustment interval, so as to determine the baseline adjustment flow that is gradually close to the target flow based on the new adjustment interval, so that the deviation of the flow of the pneumoperitoneum tube 3 that is equal to the baseline adjustment flow after the final adjustment and the target flow information is less than or equal to the preset threshold, that is, it is stable within the required flow range.

[0062] More specifically, in step A3, the reference adjustment flow is a temporary target set in the process of adjusting the flow of the pneumoperitoneum tube 3, and the loop process of step A2-step A5 is equivalent to looping to set a temporary target close to the target flow information to achieve multi-level adjustment of the flow output by the pneumoperitoneum tube 3, so that the output flow information gradually converges near the target flow information.

[0063] More specifically, the preset threshold in step A4 may be a deviation threshold set by the user according to usage requirements.

[0064] In some preferred embodiments, step A2 is to calculate and determine the reference adjustment flow rate based on the following formula: (2) Among them, Fa is the reference regulation flow, F max and F min are the upper and lower limits of the adjustment range respectively.

[0065] Specifically, based on the median value of the reference regulation flow rate regulation interval obtained by formula (2), combined with the assignment replacement processing of step A5, the binary processing of the regulation interval is realized during the regulation process, which has the advantage of efficient regulation.

[0066] In some preferred embodiments, the flow regulating assembly 4 comprises a proportional valve; Step A3 includes: A31, determining a regulating voltage step value of the proportional valve based on a deviation between a reference regulating flow rate and output flow rate information in a most recent stable state and a preset mapping relationship; A32. Based on the adjustment voltage step value, the proportional valve opening is changed according to the reference adjustment flow to adjust the flow of the pneumoperitoneum tube 3.

[0067] Specifically, Figure 3 As shown, the proportional valve is based on the proportional valve control voltage input by the controller 8 to adjust the opening to adjust the flow of the pneumoperitoneum tube 3, and the adjustment voltage step value is the change amplitude of the proportional valve control voltage per unit time, that is, the controller 8 gradually adjusts the proportional valve control voltage based on the adjustment voltage step value to achieve the adjustment of the opening of the proportional valve; wherein, the adjustment voltage step value determines the rate of change of the opening of the proportional valve, and the larger the value, the higher the flow regulation efficiency, and the more obvious the relatively generated flow fluctuation; step A31 is equivalent to setting a suitable opening regulation efficiency of the proportional valve according to the degree of difference between the benchmark adjustment flow as a temporary target and the output flow information in the most recent stable state, so that the flow regulation method of the pneumoperitoneum machine of the embodiment of the present application can adaptively select a suitable adjustment voltage step value according to the above-mentioned degree of difference to change the adjustment rate of the proportional valve to achieve coarse adjustment and fine adjustment of the output flow information, so as to ensure that the output flow information can efficiently approach the target flow information in the early stage of adjustment and accurately and stably converge near the target flow information in the later stage of adjustment.

[0068] In some preferred implementations, the mapping relationship includes: Among them, Fa is the reference regulation flow, F max and F min are the upper and lower limits of the adjustment range respectively.

[0069] Specifically, based on the median value of the reference regulation flow rate regulation interval obtained by formula (2), combined with the assignment replacement processing of step A5, the binary processing of the regulation interval is realized during the regulation process, which has the advantage of efficient regulation.

[0070] In some preferred embodiments, the flow regulating assembly 4 comprises a proportional valve; Step A3 includes: A31, determining a regulating voltage step value of the proportional valve based on a deviation between a reference regulating flow rate and output flow rate information in a most recent stable state and a preset mapping relationship; A32. Based on the adjustment voltage step value, the proportional valve opening is changed according to the reference adjustment flow to adjust the flow of the pneumoperitoneum tube 3.

[0071] Specifically, Figure 3As shown, the proportional valve is based on the proportional valve control voltage input by the controller 8 to adjust the opening to adjust the flow of the pneumoperitoneum tube 3, and the adjustment voltage step value is the change amplitude of the proportional valve control voltage per unit time, that is, the controller 8 gradually adjusts the proportional valve control voltage based on the adjustment voltage step value to achieve the adjustment of the opening of the proportional valve; wherein, the adjustment voltage step value determines the rate of change of the opening of the proportional valve, and the larger the value, the higher the flow regulation efficiency, and the more obvious the relatively generated flow fluctuation; step A31 is equivalent to setting a suitable opening regulation efficiency of the proportional valve according to the degree of difference between the benchmark adjustment flow as a temporary target and the output flow information in the most recent stable state, so that the flow regulation method of the pneumoperitoneum machine of the embodiment of the present application can adaptively select a suitable adjustment voltage step value according to the above-mentioned degree of difference to change the adjustment rate of the proportional valve to achieve coarse adjustment and fine adjustment of the output flow information, so as to ensure that the output flow information can efficiently approach the target flow information in the early stage of adjustment and accurately and stably converge near the target flow information in the later stage of adjustment.

[0072] In some preferred implementations, the mapping relationship includes: (3) Wherein, Vs (dF) is the regulating voltage step value, and dF is the deviation between the reference regulating flow and the output flow information in the most recent stable state.

[0073] More specifically, the above mapping relationship further clarifies the specific matching relationship between the deviation between the reference regulation flow and the output flow information in the most recent stable state and the regulation voltage step value, so that the output flow information can be efficiently approached to the target flow information by slightly ignoring the flow fluctuation caused by the regulation in the early stage of regulation and quickly adjusting the proportional valve at a high opening change rate, and by slightly slowing down the opening change rate and reducing the flow fluctuation caused by the regulation to adjust the proportional valve, so that the output flow information can accurately and stably converge near the target flow information.

[0074] It should be noted that the unit of dF is SCCM, and the unit of Vs (dF) is V (volt).

[0075] In summary, the embodiments of the present application provide a flow regulation system and method for an insuffloscope, wherein the flow regulation system of the insuffloscope in the embodiments of the present application utilizes a controller 8 to continuously calculate and obtain average volatility information based on output flow information, so as to filter out output flow information with fluctuations based on the average volatility information, and then drive the flow regulation component 4 to adjust the flow of the insuffloscope tube 3 based on the latest output flow information in a stable state. The output flow information in a stable state can accurately characterize the flow of the insuffloscope tube 3 in a normal state, so as to smoothly, accurately and efficiently complete the flow regulation process of the insuffloscope tube 3.

[0076] In the embodiments provided in the present application, it should be understood that the disclosed systems and methods can be implemented in other ways. The system embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some communication interface, device or unit, which can be electrical, mechanical or other forms.

[0077] In addition, the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0078] Furthermore, the functional modules in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0079] In this document, relational terms such as first and second, etc. are used merely to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0080] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A flow regulating system for an insufflator, used for regulating the flow of an insufflator tube, characterized in that: The system comprises: The insufflator body is provided with an air supply pipeline for supplying air, the outlet end of the air supply pipeline is connected to an insufflator tube, the air supply pipeline is provided with a flow regulating component for regulating the gas output flow of the air supply pipeline, and a flow sensor for collecting output flow information output by the air supply pipeline; A controller, configured to calculate and obtain average fluctuation rate information about the flow rate according to the output flow rate information, and determine whether the output flow rate information is in a stable state based on the average fluctuation rate information; The controller is also used to drive the flow regulating component to regulate the flow of the pneumoperitoneum tube according to the output flow information and the target flow information in the stable state when the output flow information is in a stable state.

2. A flow regulation method for an insufflator, used for regulating the flow of an insufflator tube, characterized in that: The method is applied in a flow regulating system of an insufflator, and the flow regulating system of the insufflator comprises: The insufflator body is provided with an air supply pipeline for supplying air, the outlet end of the air supply pipeline is connected to an insufflator tube, the air supply pipeline is provided with a flow regulating component for regulating the gas output flow of the air supply pipeline, and a flow sensor for collecting output flow information output by the air supply pipeline; The method comprises the following steps: S1. Calculating and acquiring average fluctuation rate information about the flow according to the output flow information, and judging whether the output flow information is in a stable state based on the average fluctuation rate information; S2. When the output flow information is in a stable state, the flow regulating component is driven to regulate the flow of the pneumoperitoneum tube according to the output flow information and the target flow information in the stable state.

3. The flow rate regulation method of the pneumoperitoneum machine according to claim 2, characterized in that: The step of calculating and obtaining the average fluctuation rate information about the flow according to the output flow information is to intercept the output flow information within the collection time period based on a time window of a preset length to calculate the average fluctuation rate information about the flow.

4. The flow rate regulation method of the pneumoperitoneum machine according to claim 2 or 3, characterized in that: The average volatility information is calculated based on the standard deviation.

5. The flow rate regulation method of the pneumoperitoneum machine according to claim 4, characterized in that: The average volatility information is calculated based on the following formula: ； Among them, σ is the average volatility information, N is the total number of output flow information collected during the collection period, and X i is the output flow information collected for the ith time within the collection period, and μ is the mean value of the output flow information within the collection period.

6. The flow rate regulation method of the pneumoperitoneum machine according to claim 2, characterized in that: The step of driving the flow regulating component to regulate the flow of the pneumoperitoneum tube according to the output flow information and the target flow information in a stable state comprises: It is determined whether the deviation between the output flow information and the target flow information in the stable state is greater than a preset threshold value, and if so, the flow regulating component is driven to regulate the flow of the pneumoperitoneum tube based on dichotomy.

7. The flow rate regulation method of the pneumoperitoneum machine according to claim 6, characterized in that: The step of driving the flow regulating component to regulate the flow of the pneumoperitoneum tube based on dichotomy comprises: A1. Obtain the upper limit and lower limit of the preset adjustment range; A2. Determine the reference regulating flow rate based on the upper and lower limits of the regulating interval; A3, driving the flow regulating component to regulate the flow of the pneumoperitoneum tube according to the reference regulating flow; A4, determining whether the deviation between the output flow information and the target flow information in the stable state after the adjustment is completed is less than or equal to the preset threshold, if yes, then the adjustment is terminated, otherwise, executing step A5; A5. According to the relationship between the reference adjustment flow and the target flow information, assign the value of the reference adjustment flow to the upper limit or lower limit of the adjustment interval, and then return to step A2.

8. The flow rate regulation method of the pneumoperitoneum machine according to claim 7, characterized in that: Step A2 is to calculate and determine the reference adjustment flow rate based on the following formula: ； Among them, Fa is the reference regulation flow, F max and F min are the upper limit and lower limit of the adjustment range respectively.

9. The flow rate regulation method of the pneumoperitoneum machine according to claim 7, characterized in that: The flow regulating assembly includes a proportional valve; Step A3 includes: A31, determining a regulating voltage step value of the proportional valve based on a deviation between the reference regulating flow and the output flow information in the most recent stable state and a preset mapping relationship; A32. Based on the adjustment voltage step value, change the opening of the proportional valve according to the reference adjustment flow to adjust the flow of the pneumoperitoneum tube.

10. The flow rate regulation method of the pneumoperitoneum machine according to claim 9, characterized in that: The mapping relationship includes: ； Wherein, Vs (dF) is the regulating voltage step value, and dF is the deviation between the reference regulating flow and the output flow information in the most recent stable state.

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