Dosing control method and system

Abstract

The invention discloses a dosing control method and system. The dosing control system comprises a control system, a storage tank, a dosing pump and a measuring device, the output end of the storage tank is connected with the input end of the dosing pump; the storage tank is used for storing chemicals, and the dosing pump is used for controlling the dosing amount; the output end of the dosing pump is connected with the reactor, and the measuring device is arranged on the reactor; the measuring device is used for measuring key parameters of the reactor; the control system, the measuring device and the dosing pump are in communication connection; when the control system receives the key parameters sent by the measuring device, the dosing amount is determined according to the key parameters, and the dosing amount is sent to the dosing pump. The control system calculates the chemical adding amount according to the key parameters and sends the chemical adding amount to the chemical adding pump so as to complete chemical adding, the key parameters are monitored in real time, the control system can accurately calculate the needed chemical adding amount instead of depending on manual estimation, the tedious steps of manual estimation are reduced, and then the chemical adding efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of chemical technology of power plants, and in particular to a dosing control method and system. Background Art

[0002] During the operation of thermal power plants, appropriate chemicals are added to the water treatment system to meet the operating needs of the units. The addition of chemicals not only helps prevent the formation of scale when boiler water evaporates and avoids serious corrosion of boiler tubes, but also reduces the amount of boiler waste without affecting the stable operation of the boiler.

[0003] At present, the operator generally adds drugs manually by comparing the measured indicators. The operator first measures the current indicators according to the operating data or experimental requirements, calculates the required dosage according to the measured indicators and requirements, and adds drugs according to the dosage. However, since manual measurement usually involves multiple steps, and according to different indicators and requirements, the calculation of the required dosage may involve multiple formulas and data, which takes a lot of time and affects the overall dosing efficiency.

[0004] Therefore, how to improve the efficiency of dosing has become an urgent problem to be solved in this field. Summary of the invention

[0005] The present application provides a dosing control method and system, the purpose of which is to improve dosing efficiency.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] A dosing control system, comprising: a control system, a storage tank, a dosing pump and a measuring device;

[0008] The output end of the storage tank is connected to the input end of the dosing pump; the storage tank is used to store chemicals, and the dosing pump is used to control the dosing amount;

[0009] The output end of the dosing pump is connected to the reactor, and the measuring device is arranged on the reactor; the measuring device is used to measure the key parameters of the reactor, and the key parameters at least include the pH value;

[0010] The control system, the measuring device and the dosing pump are communicatively connected; wherein, when the control system receives the key parameters sent by the measuring device, it determines the dosing amount according to the key parameters and sends the dosing amount to the dosing pump.

[0011] Optionally, the control system includes: an input card component, an output card component and a controller;

[0012] The input card is used to send the key parameters to the controller when receiving the key parameters sent by the measuring device;

[0013] The controller is used to determine the dosage according to the key parameter when receiving the key parameter, and send the dosage to the output card;

[0014] The output card is used to send the dosage to the dosage pump when receiving the dosage.

[0015] Optionally, the model of the controller is FCP100, and the model of the input card and the output card is FAI108.

[0016] Optionally, the drug adding control system further includes: a host computer;

[0017] The host computer is connected to the controller via a network cable; wherein the host computer is used to display the remaining amount of chemicals in the storage tank, the working status and dosage of the dosing pump, and the key parameters of the reactor.

[0018] Optionally, the measuring device is a pH transmitter.

[0019] A dosing control method, applied to the above-mentioned dosing control system, comprises:

[0020] Measuring key parameters of the reactor using a measuring device and sending the key parameters to a control system;

[0021] After receiving the key parameters, the control system determines the dosage according to the key parameters, and sends the dosage and the preset dosage frequency to the dosage pump;

[0022] After receiving the dosage and the dosage frequency, the chemicals in the storage tank are added to the reactor through the dosage pump according to the dosage and the dosage frequency.

[0023] Optionally, after receiving the key parameters, determining the dosage according to the key parameters by the control system includes:

[0024] Determine whether the key parameter is within a preset parameter range; the preset parameter range includes a preset upper limit and a preset lower limit;

[0025] If the key parameter is not within the preset parameter range, determining the initial dosage according to the preset upper limit and the key parameter, or the preset lower limit and the key parameter;

[0026] The sum of the initial dosage and the preset dosage is calculated and determined as the dosage; wherein the preset dosage includes a fixed dosage corresponding to a preset upper limit and a fixed dosage corresponding to a preset lower limit.

[0027] Optionally, determining the initial dosage according to the preset upper limit and the key parameter, or the preset lower limit and the key parameter, includes:

[0028] If the key parameter is greater than the preset upper limit, calculating the difference between the key parameter and the preset upper limit and marking it as a first difference;

[0029] Determine the initial dosage according to a preset function relationship diagram and the first difference; the preset function relationship diagram at least includes the relationship between the first difference and the initial dosage;

[0030] If the key parameter is less than the preset lower limit, calculating the difference between the key parameter and the preset lower limit, and marking it as a second difference;

[0031] The initial dosage is determined according to a preset functional relationship diagram and the second difference; the preset functional relationship diagram at least includes the relationship between the second difference and the initial dosage.

[0032] Optionally, the calculating the sum of the initial dosage and the preset dosage and determining the sum as the dosage includes:

[0033] If there is a corresponding relationship between the initial dosage and the preset upper limit, the sum of the initial dosage and the fixed dosage corresponding to the preset lower limit is calculated and determined as the dosage;

[0034] If there is a corresponding relationship between the initial dosage and the preset lower limit, the sum of the initial dosage and the fixed dosage corresponding to the preset upper limit is calculated and determined as the dosage.

[0035] Optionally, also include:

[0036] If the key parameter is within the preset parameter range, the dosage is determined to be 0.

[0037] The technical solution provided by the present application is that the output end of the storage tank is connected to the input end of the dosing pump; the storage tank is used to store chemicals, and the dosing pump is used to control the dosing amount; the output end of the dosing pump is connected to the reactor, and the measuring device is set on the reactor; the measuring device is used to measure the key parameters of the reactor; the control system, the measuring device and the dosing pump are connected in communication; when the control system receives the key parameters sent by the measuring device, it determines the dosing amount according to the key parameters, and sends the dosing amount to the dosing pump. The control system calculates the dosing amount according to the key parameters and sends the dosing amount to the dosing pump to complete the addition of chemicals. By real-time monitoring of the key parameters, the control system can accurately calculate the required dosing amount instead of relying on manual estimation, reducing the cumbersome steps of manual estimation, thereby improving the dosing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 A schematic diagram of the architecture of a drug dosing control system provided in an embodiment of the present application;

[0040] Figure 2 A schematic diagram of a dosing pump provided in an embodiment of the present application;

[0041] Figure 3 A schematic diagram of a pH transmitter provided in an embodiment of the present application;

[0042] Figure 4 A schematic diagram of a control system 11 provided in an embodiment of the present application;

[0043] Figure 5 A schematic diagram of a host computer provided in an embodiment of the present application;

[0044] Figure 6 A flow chart of a dosing control method provided in an embodiment of the present application;

[0045] Figure 7 A flow chart of a method for determining dosage provided in an embodiment of the present application;

[0046] Figure 8 A flowchart of another method for determining dosage provided in an embodiment of the present application. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0048] In this application, the terms "comprises", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0049] like Figure 1 , which is a schematic diagram of the architecture of a dosing control system provided in an embodiment of the present application, the dosing control system includes: a control system 11, a storage tank 12, a dosing pump 13 and a measuring device 14.

[0050] The output end of the storage tank 12 is connected to the input end of the dosing pump 13 .

[0051] The storage tank 12 is used to store chemicals, and the dosing pump 13 is used to control the dosing amount.

[0052] Optionally, the specific form of the dosing pump 13 is as follows: Figure 2 shown.

[0053] Specifically, a dosing pipeline is led out from the bottom of the storage tank 12, and a dosing pump 13 is arranged on the pipeline.

[0054] It can be understood that the dosing pump 13 adds chemicals from the storage tank 12 to the device that needs to be dosing. Since the dosing pump 13 can accurately control the dosage of chemicals according to the set dosage, this is very critical for many chemical processes (such as water treatment, chemical production, etc.), because the dosage of chemicals needs to be strictly controlled to ensure the effect of the reaction, the stability of production and the quality of the product.

[0055] It should be noted that the storage tank 12 also needs to maintain a certain margin to ensure the dosing requirements for the operation of the unit.

[0056] The output end of the dosing pump 13 is connected to the reactor 15 , and the measuring device 14 is arranged on the reactor 15 .

[0057] The measuring device 14 is used to measure key parameters of the reactor 15, and the key parameters at least include pH value.

[0058] Specifically, the outlet pipe of the dosing pump 13 is connected to the reactor 15 .

[0059] Optionally, the measuring device 14 is a pH transmitter, which is used to measure the key parameters of the reactor 15. The specific form of the pH transmitter is as follows: Figure 3 shown.

[0060] Optionally, the measuring device 14 may also be a sensor, such as a pH sensor, a temperature sensor, a concentration sensor, etc.

[0061] It can be understood that the key parameters of the reactor 15 are first measured by the measuring device 14, and whether chemicals need to be added to the reactor 15 is determined based on the key parameters. If chemicals need to be added, the chemicals are added to the reactor 15 from the storage tank 12 through the dosing pump 13.

[0062] It should be noted that after the collected non-electrical signals (ie key parameters) are converted into key parameters in the form of electrical signals recognizable by the control system 11, the key parameters in the form of electrical signals are output to the control system 11 (eg DCS).

[0063] The control system 11 , the measuring device 14 and the dosing pump 13 are communicatively connected with each other.

[0064] When the control system 11 receives the key parameters sent by the measuring device 14 , it determines the dosage according to the key parameters and sends the dosage to the dosage pump 13 .

[0065] It can be understood that when the control system 11 receives the key parameters sent by the measuring device 14, it calculates the dosage according to the key parameters and sends the dosage to the dosing pump 13, so that the dosing pump 13 adds the chemicals in the storage tank 12 to the reactor 15 according to the dosage.

[0066] For example, the key parameter is the pH value, and the chemicals in the storage tank 12 are added to the reactor 15 according to the dosage through the dosing pump 13 to control the pH of the reactor 15 to be within a specified range.

[0067] For further information, see Figure 4 The control system 11 includes: an input card component 41, an output card component 42 and a controller 43.

[0068] The input card 41 is used to send the key parameters to the controller 43 when receiving the key parameters sent by the measuring device 14 .

[0069] It should be noted that since the measuring device 14 is a PH transmitter, it is necessary to first convert the collected non-electrical signals (i.e., key parameters) into key parameters in the form of electrical signals that can be recognized by the control system 11, and then send the key parameters in the form of electrical signals to the input card 41, so that the input card 41 sends the key parameters in the form of electrical signals to the controller 43.

[0070] The controller 43 is used to determine the dosage according to the key parameters when receiving the key parameters, and send the dosage to the output card 42.

[0071] It is understandable that when the controller 43 receives the key parameters in the form of electrical signals, it will calculate the dosage based on the key parameters, that is, compile the configuration of the key parameters, obtain the dosage (that is, the analog quantity), and send the dosage to the output card 42.

[0072] The output card 42 is used to send the dosage amount to the dosage pump 13 when receiving the dosage amount.

[0073] It is understandable that, after receiving the dosage, the output card 42 sends the dosage to the dosage pump 13 to control the dosage pump 13 to add the chemicals in the storage tank 12 to the reactor 15 according to the dosage.

[0074] Optionally, the model of the controller 43 is FCP100, and the model of the input card 41 and the output card 42 is FAI108.

[0075] For further information, see Figure 5 The dosing control system includes: a host computer 51.

[0076] The host computer 51 is connected to the controller 43 via a network cable.

[0077] The host computer 51 is used to display the remaining amount of chemicals in the storage tank 12 , the working state and dosage of the dosing pump 13 , and key parameters of the reactor 15 .

[0078] Optionally, the host computer 51 may also display the frequency of signal transmission.

[0079] It should be noted that the host computer 51 is connected to the controller 43 via a network cable to monitor and operate the dosing system in real time. The controller 43 is installed in the control cabinet and communicates with the analog input card 41 and the analog output card 42 through the backplane to complete data input and output.

[0080] In summary, the control system calculates the dosage based on the key parameters collected by the measuring device and sends the dosage to the dosing pump to complete the addition of chemicals. By real-time monitoring of key parameters, the control system can accurately calculate the required dosage instead of relying on manual estimation, reducing the tedious steps of manual estimation and thus improving the dosing efficiency.

[0081] Corresponding to the dosing control system provided in the above embodiment of the present application, the embodiment of the present application further provides a dosing control method, which is applicable to the dosing control system mentioned in the above embodiment of the present application, such as Figure 6 As shown, the following steps are included:

[0082] S601: Measure key parameters of the reactor using a measuring device, and send the key parameters to a control system.

[0083] Among them, key parameters include but are not limited to pH value.

[0084] It should be noted that the inspection time is first set in the control system, and the control system triggers the measuring device to measure the key parameters of the reactor according to the inspection time, and sends the key parameters to the control system.

[0085] S602: After receiving the key parameters, the control system determines the dosage according to the key parameters, and sends the dosage and the preset dosage frequency to the dosage pump.

[0086] Optionally, the dosing frequency may be preset according to the characteristics of the chemicals or different working conditions.

[0087] It can be understood that the dosage is determined based on the key parameters. Specifically, it is first determined whether the key parameters meet the dosing conditions. If the dosing conditions are met, the dosage is calculated based on the preset parameters in the dosing conditions, and the dosage and the preset dosing frequency are sent to the dosing pump.

[0088] Optionally, in another embodiment of the present application, after receiving the key parameters in step S602, the control system determines the specific implementation method of the dosage according to the key parameters, such as Figure 7 As shown, the following steps are included:

[0089] S701: Determine whether the key parameter is within a preset parameter range.

[0090] If the key parameter is not within the preset parameter range, step S702 is executed.

[0091] Among them, the preset parameter range includes a preset upper limit and a preset lower limit.

[0092] Optionally, the preset upper limit and the preset lower limit can be set according to actual conditions and are not specifically limited here.

[0093] Specifically, assuming that the key parameter is 11 and the preset parameter range is 0-10, it is determined whether the key parameter is within the preset parameter range. Obviously, the key parameter is no longer within the preset parameter range, so step S702 is continued.

[0094] It can be understood that if the key parameter is not within the preset parameter range, it means that the key parameter meets the drug addition condition at this time, so step S702 is continued.

[0095] Optionally, after step S701, the method further includes:

[0096] If the key parameter is within the preset parameter range, the dosage is determined to be 0.

[0097] If the key parameter is within the preset parameter range, the key parameter does not meet the dosing condition, which means that no dosing is required at this time, and the dosing amount is set to 0.

[0098] S702: Determine the initial dosage according to the preset upper limit and key parameters, or the preset lower limit and key parameters.

[0099] It can be understood that if the key parameter is greater than the preset upper limit, the initial dosage is determined based on the preset upper limit and the key parameter. If the key parameter is less than the preset lower limit, the initial dosage is determined based on the preset lower limit and the key parameter.

[0100] Optionally, in another embodiment of the present application, the specific implementation of step S702 includes the following steps:

[0101] If the key parameter is greater than the preset upper limit, the difference between the key parameter and the preset upper limit is calculated and marked as the first difference.

[0102] The specific form of calculating the difference between the key parameter and the preset upper limit is shown in formula (1).

[0103] First difference = key parameter - preset upper limit (1)

[0104] For example, if the key parameter is 11 and the preset upper limit is 10, then the calculated first difference is 1.

[0105] The initial dosage is determined according to the preset functional relationship diagram and the first difference.

[0106] The preset function relationship diagram at least includes the relationship between the first difference and the initial dosage.

[0107] It can be understood that a curve is pre-set in the preset function relationship diagram, the horizontal axis is the first difference, and the vertical axis is the initial dosage. When the preset function relationship diagram and the first difference are known numbers, the corresponding initial dosage can be found from the preset function relationship diagram.

[0108] If the key parameter is less than the preset lower limit, the difference between the key parameter and the preset lower limit is calculated and marked as the second difference.

[0109] The specific form of calculating the difference between the key parameter and the preset lower limit is shown in formula (2).

[0110] First difference = preset lower limit - key parameter (2)

[0111] For example, if the key parameter is 1 and the preset upper limit is 2, then the calculated first difference is 1.

[0112] The initial dosage is determined according to the preset functional relationship diagram and the second difference.

[0113] The preset function relationship diagram at least includes the relationship between the second difference and the initial dosage.

[0114] It can be understood that a curve is pre-set in the preset function relationship diagram, the horizontal axis is the second difference, and the vertical axis is the initial dosage. When the preset function relationship diagram and the second difference are known numbers, the corresponding initial dosage can be found from the preset function relationship diagram.

[0115] S703: Calculate the sum of the initial dosage and the preset dosage, and determine it as the dosage.

[0116] The preset dosage includes a fixed dosage corresponding to a preset upper limit and a fixed dosage corresponding to a preset lower limit.

[0117] Optionally, in another embodiment of the present application, a specific implementation of step S703 includes:

[0118] If the initial dosage amount corresponds to the preset upper limit, the sum of the initial dosage amount and the fixed dosage amount corresponding to the preset lower limit is calculated and determined as the dosage amount.

[0119] It can be understood that if the initial dosage corresponds to the preset upper limit, that is, the initial dosage is calculated by the preset upper limit and the key parameters, then the sum of the initial dosage and the fixed dosage corresponding to the preset lower limit is calculated and determined as the dosage.

[0120] If there is a corresponding relationship between the initial dosage and the preset lower limit, the sum of the initial dosage and the fixed dosage corresponding to the preset upper limit is calculated and determined as the dosage.

[0121] It can be understood that if there is a corresponding relationship between the initial dosage and the preset lower limit, that is, when the initial dosage is calculated by the preset lower limit and the key parameters, the sum of the initial dosage and the fixed dosage corresponding to the preset lower limit is calculated and determined as the dosage.

[0122] S603: After receiving the dosage and dosage frequency, the chemicals in the storage tank are added to the reactor through the dosage pump according to the dosage and dosage frequency.

[0123] It can be understood that the chemicals in the storage tank are added to the reactor by the dosing pump according to the dosing amount and dosing frequency, that is, the chemicals in the storage tank are added to the reactor according to the mass or volume of the chemicals added each time and the interval time of the chemical addition.

[0124] In addition, the above-mentioned dosing control method is also applicable to another dosing control device, including: a preset upper limit and a preset lower limit setting module 101; a dosing frequency setting value module 107; a measurement signal input module 108; a deviation operation module 102; a function module 103; a limiting module 104; an analog switching module 105, 106; an analog summation module 109; and an actuator hand operator 100.

[0125] See also Figure 8 , the key parameters are sent to the control system through the measurement signal input module 108, and the limit module 104 determines whether the key parameters are within the preset parameter range. If not, the deviation of the preset upper limit or the preset lower limit is calculated by the deviation calculation module 102 to obtain the initial dosing amount corresponding to the deviation, and the initial dosing amount is output through the analog switching modules 105 and 106; the sum of the initial dosing amount and the preset dosing amount is calculated by the analog summation module 109 to obtain the dosing amount, and the dosing amount is sent to the actuator hand operator 100, and the dosing pump is controlled by the actuator hand operator 100.

[0126] In summary, the control system calculates the dosage based on the key parameters collected by the measuring device and sends the dosage to the dosing pump to complete the addition of chemicals. By real-time monitoring of key parameters, the control system can accurately calculate the required dosage instead of relying on manual estimation, reducing the tedious steps of manual estimation and thus improving the dosing efficiency.

[0127] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can refer to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system or system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiment. The system and system embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative work.

[0128] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0129] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dosing control system, characterized in that: The dosing control system comprises: a control system, a storage tank, a dosing pump and a measuring device; The output end of the storage tank is connected to the input end of the dosing pump; the storage tank is used to store chemicals, and the dosing pump is used to control the dosing amount; The output end of the dosing pump is connected to the reactor, and the measuring device is arranged on the reactor; the measuring device is used to measure the key parameters of the reactor, and the key parameters at least include the pH value; The control system, the measuring device and the dosing pump are communicatively connected; wherein, when the control system receives the key parameters sent by the measuring device, it determines the dosing amount according to the key parameters and sends the dosing amount to the dosing pump.

2. The system according to claim 1, characterized in that The control system comprises: an input card, an output card and a controller; The input card is used to send the key parameters to the controller when receiving the key parameters sent by the measuring device; The controller is used to determine the dosage according to the key parameter when receiving the key parameter, and send the dosage to the output card; The output card is used to send the dosage to the dosage pump when receiving the dosage.

3. The system according to claim 2, characterized in that The model of the controller is FCP100, and the model of the input card and the output card is FAI108.

4. The system according to claim 2, characterized in that The dosing control system further includes: a host computer; The host computer is connected to the controller via a network cable; wherein the host computer is used to display the remaining amount of chemicals in the storage tank, the working status and dosage of the dosing pump, and the key parameters of the reactor.

5. The system according to claim 1, characterized in that The measuring device is a pH transmitter.

6. A dosing control method, characterized in that: The dosing control system applied to any one of claims 1 to 5 above comprises: Measuring key parameters of the reactor using a measuring device and sending the key parameters to a control system; After receiving the key parameters, the control system determines the dosage according to the key parameters, and sends the dosage and the preset dosage frequency to the dosage pump; After receiving the dosage and the dosage frequency, the chemicals in the storage tank are added to the reactor through the dosage pump according to the dosage and the dosage frequency.

7. The method according to claim 6, characterized in that After receiving the key parameters, the control system determines the dosage according to the key parameters, including: Determine whether the key parameter is within a preset parameter range; the preset parameter range includes a preset upper limit and a preset lower limit; If the key parameter is not within the preset parameter range, determining the initial dosage according to the preset upper limit and the key parameter, or the preset lower limit and the key parameter; The sum of the initial dosage and the preset dosage is calculated and determined as the dosage; wherein the preset dosage includes a fixed dosage corresponding to a preset upper limit and a fixed dosage corresponding to a preset lower limit.

8. The method according to claim 7, characterized in that Determining the initial dosage according to the preset upper limit and the key parameter, or the preset lower limit and the key parameter, comprises: If the key parameter is greater than the preset upper limit, calculating the difference between the key parameter and the preset upper limit and marking it as a first difference; Determine the initial dosage according to a preset function relationship diagram and the first difference; the preset function relationship diagram at least includes the relationship between the first difference and the initial dosage; If the key parameter is less than the preset lower limit, calculating the difference between the key parameter and the preset lower limit, and marking it as a second difference; The initial dosage is determined according to a preset functional relationship diagram and the second difference; the preset functional relationship diagram at least includes the relationship between the second difference and the initial dosage.

9. The method according to claim 7, characterized in that: The calculating the sum of the initial dosage and the preset dosage and determining the sum as the dosage comprises: If there is a corresponding relationship between the initial dosage and the preset upper limit, the sum of the initial dosage and the fixed dosage corresponding to the preset lower limit is calculated and determined as the dosage; If there is a corresponding relationship between the initial dosage and the preset lower limit, the sum of the initial dosage and the fixed dosage corresponding to the preset upper limit is calculated and determined as the dosage.

10. The method according to claim 7, characterized in that Also includes: If the key parameter is within the preset parameter range, the dosage is determined to be 0.

Images