Flowmeter fault judgment method and system

Abstract

The invention discloses a flow meter fault judgment method and system, and the method comprises the steps: obtaining the real-time output quantity of a flow meter, and carrying out the judgment of an over-limit fault of the flow meter; judging a dead number fault of the flow meter based on flow meter overrun fault judgment; based on flow meter counting dead number fault judgment, the flow meter counting value collected in real time is compared with the predicted flow value, and a comparison result is obtained; based on the comparison result of the flow meter counting value collected in real time and the predicted flow value, the deviation fault of the flow meter is judged according to the fault judgment strategy of the flow meter, and multiple fault judgment of the flow meter is achieved. According to the method, the problem of missed judgment of meter faults in the prior art is solved, the pressure meter is used for judging the faults of the flow meter, the cost is saved, and the accuracy rate of meter fault judgment is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid cooling, and in particular to a flow meter fault determination method and system. Background Art

[0002] In the existing fluid cooling system of high-power electronic equipment, flow meters, pressure meters, etc. are generally configured. The flow meter is a key monitoring device used to measure the flow rate of the cooling medium. At present, there are two common output signal types of flow meters: one is 0-10V voltage signal, and the other is 4-20mA current signal. Both signals are analog signals.

[0003] However, the existing meter fault determination method relies on a single criterion, such as meter output range over-limit, which may lead to missed judgment and affect the operational stability of the cooling system. Taking the cooling system that monitors 4-20mA current signals as an example, when the output current range of the flow meter is lower than 4mA or higher than 20mA, the system determines that the flow meter is over-limit and sends out an alarm signal; however, due to the flow meter's own fault, the output current becomes another value within the range of 4-20mA or becomes a dead number within the range of 4-20mA, and the system cannot determine that the flow meter is faulty. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the above existing problems, the present invention is proposed.

[0006] Therefore, the present invention provides a flow meter fault determination method and system to solve the problem of high computational complexity of existing optimization algorithms.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] In a first aspect, the present invention provides a flow meter fault determination method, comprising:

[0009] Obtain the real-time output of the flow meter and judge the flow meter over-limit fault;

[0010] Based on the flow meter over-limit fault judgment, the flow meter dead number fault is judged;

[0011] Based on the flow meter dead count fault judgment, the real-time collected flow meter count value is compared with the predicted flow value to obtain the comparison result;

[0012] Based on the comparison result between the real-time collected flow meter count value and the predicted flow value, the flow meter deviation fault is judged according to the flow meter fault judgment strategy, so as to realize the flow meter multiple fault judgment.

[0013] As a preferred solution of the flow meter fault determination method of the present invention, wherein:

[0014] The method of judging the flow meter over-limit fault comprises the following steps:

[0015] If the real-time output of the flow meter does not exceed the measuring range, it is determined whether the real-time output of the flow meter is a dead number;

[0016] If the real-time output of the flow meter exceeds the range, and the flow meter exceeds the range for a continuous delay of 10s, the industrial controller output meter exceeds the limit fault;

[0017] If the real-time output of the flow meter is lower than 4mA, it is determined that the real-time output of the flow meter exceeds the range;

[0018] If the real-time output of the flow meter is higher than 20mA, it is determined that the real-time output of the flow meter exceeds the measuring range.

[0019] As a preferred solution of the flow meter fault determination method of the present invention, wherein:

[0020] The determination of the flow meter dead number fault includes the industrial controller periodically reading the flow meter output value and comparing the read value with the previous value;

[0021] If the absolute value of the difference exceeds 0.1%, the flow meter output is judged to be active;

[0022] If the absolute value of the difference is less than 0.1%, the flow meter output value is determined to be a dead number;

[0023] If the flow meter output value is determined to be active, the flow meter count value collected in real time is compared with the predicted flow value;

[0024] If the flow meter output value is determined to be a dead number, and the continuous delay of the flow meter dead number reaches 60s, the industrial controller output meter dead number fault.

[0025] As a preferred solution of the flow meter fault determination method of the present invention, wherein:

[0026] The predicted flow value comprises the following steps:

[0027] By adjusting the real-time flow of the cooling system, the real-time pressure difference △P between the second pressure gauge and the first pressure gauge is calculated, and a linear curve of the change between the flow and the pressure difference is fitted;

[0028] Convert the fitted linear curve into a curve equation through programming language;

[0029] The curve equation is introduced into the prediction model of the industrial controller, and the actual pressure difference between the second pressure gauge and the first pressure gauge after the curve equation is introduced is calculated to obtain the predicted flow value under the corresponding pressure difference.

[0030] As a preferred solution of the flow meter fault determination method of the present invention, wherein:

[0031] The curve equation is expressed as:

[0032] y=ax 2 +bx+c;

[0033] Among them, y represents the predicted flow value under the corresponding pressure difference, x represents the actual pressure difference between the second pressure gauge and the first pressure gauge, a represents the quadratic term coefficient, b represents the linear term coefficient, and c represents the constant term.

[0034] As a preferred solution of the flow meter fault determination method of the present invention, wherein:

[0035] The flow meter fault judgment strategy comprises the following steps:

[0036] Compare the real-time collected flow meter count value with the predicted flow value;

[0037] If the flow deviation percentage does not exceed the preset range of the flow deviation percentage, the flow meter count value collected in real time is compared with the predicted flow value again;

[0038] If the flow deviation percentage has exceeded the preset range of the flow deviation percentage, it is determined whether the duration of the flow deviation percentage exceeding the range reaches the preset delay;

[0039] If the flow deviation percentage has exceeded the preset range of the flow deviation percentage, but the duration of the flow deviation percentage exceeding the range does not reach the preset delay, then return to re-compare the real-time collected flow meter count value with the predicted flow value;

[0040] If the flow deviation percentage has exceeded the preset range of the flow deviation percentage, and the flow deviation percentage exceeds the range for a duration reaching the preset delay, the industrial controller outputs a meter deviation fault;

[0041] If the flow deviation percentage is less than -5%, it is determined to be beyond the preset range of flow deviation percentage;

[0042] If the flow deviation percentage is greater than 5%, it is determined to be beyond the preset range of flow deviation percentage;

[0043] If the flow deviation percentage continues to be delayed for 10s, it is determined that the flow deviation percentage exceeds the range and lasts for a preset delay.

[0044] As a preferred solution of the flow meter fault determination method of the present invention, wherein:

[0045] The flow deviation percentage D is expressed as:

[0046] D=(L r -L p ) / L p *100%

[0047] Among them, L r Indicates real-time collection of flow value, L p Indicates the predicted flow value.

[0048] In a second aspect, the present invention provides a flow meter fault determination system, comprising:

[0049] An over-limit fault judgment module is used to obtain the real-time output of the flow meter and judge the over-limit fault of the flow meter;

[0050] A dead number fault judgment module is used to judge the dead number fault of the flow meter based on the flow meter over-limit fault judgment;

[0051] A comparison module is used to compare the real-time collected flow meter count value with the predicted flow value based on the flow meter dead count fault judgment to obtain a comparison result;

[0052] The deviation fault judgment module is used to judge the deviation fault of the flow meter based on the comparison result of the real-time collected flow meter count value and the predicted flow value, according to the flow meter fault judgment strategy, to realize the multiple fault judgment of the flow meter.

[0053] In a third aspect, the present invention provides a computing device, comprising:

[0054] Memory, used to store programs;

[0055] The processor is used to execute the computer executable instructions, and the computer executable instructions, when executed by the processor, implement the steps of the flow meter fault determination method.

[0056] In a fourth aspect, the present invention provides a computer-readable storage medium, comprising: when the program is executed by a processor, the steps of implementing the flow meter fault determination method are implemented.

[0057] Beneficial effects of the present invention: The present invention comprehensively monitors the working status of the flow meter through the prediction model and real-time data collection of the industrial controller, timely discovers and classifies different types of faults, and takes corresponding maintenance measures, thereby solving the problem of missed judgment of meter faults in the prior art. The flow meter fault is judged by using a pressure meter, which not only saves costs but also increases the accuracy of meter fault judgment. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0059] Figure 1 A basic flow chart of a flow meter fault determination method provided by an embodiment of the present invention;

[0060] Figure 2 A flow meter fault determination flow diagram of a flow meter fault determination method provided by an embodiment of the present invention;

[0061] Figure 3 A fluid cooling system model diagram of a flow meter fault determination method provided by an embodiment of the present invention;

[0062] Figure 4 A linear curve diagram fitted to an embodiment of a flow meter fault determination method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0063] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0064] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0065] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0066] The present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0067] At the same time, in the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper, lower, inner and outer" are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first, second or third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0068] In the present invention, unless otherwise clearly specified and limited, the terms "install, connect, connect" should be understood in a broad sense, for example: it can be a fixed connection, a detachable connection or an integral connection; it can also be a mechanical connection, an electrical connection or a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] Example 1

[0070] Reference Figure 1-Figure 3 , is an embodiment of the present invention, and provides a flow meter fault determination method, such as Figure 1 , as shown in 2, comprising the following steps:

[0071] The model diagram of the fluid cooling system based on the industrial controller proposed by the present invention is as follows: Figure 3 As shown, the equipment in the cooling system includes: 1-main circulation pump; 2-flow meter; 3-first pressure meter; 4-second pressure meter; 5-external cooling equipment; 6-cooled equipment. Among them, the main circulation pump is arranged between the inlet of the cooling equipment and the outlet of the cooled equipment, the flow meter is arranged between the outlet of the cooled equipment and the inlet of the main circulation pump, the first pressure meter is arranged at the inlet side of the main circulation pump, and the second pressure meter is arranged at the outlet side of the main circulation pump. The first pressure meter, the second pressure meter, and the flow meter are connected to the industrial controller respectively, and the industrial controller collects real-time data and analyzes it.

[0072] The industrial controller can be simplified into the following four parts: CPU, analog quantity acquisition board, communication board, and host computer.

[0073] The analog quantity acquisition board is responsible for collecting analog quantity signals of the cooling system; the CPU is responsible for processing data from the analog quantity acquisition board, calculating and fitting parameters; the communication board is responsible for transmitting information from the analog quantity acquisition board and the CPU to the host computer to realize real-time data display and human-computer interaction; the host computer adopts an integrated touch screen, and its functions include parameter setting, data monitoring, abnormal alarm, historical data recording and other functions.

[0074] S1: Obtain the real-time output of the flow meter and judge the over-limit fault of the flow meter;

[0075] In the embodiment of the present application, judging the flow meter over-limit fault includes the following steps:

[0076] If the real-time output of the flow meter does not exceed the measuring range, it is determined whether the real-time output of the flow meter is a dead number;

[0077] If the real-time output of the flow meter exceeds the range, and the flow meter exceeds the range for a continuous delay of 10s, the industrial controller output meter exceeds the limit fault;

[0078] If the real-time output of the flow meter is lower than 4mA, it is determined that the real-time output of the flow meter exceeds the range;

[0079] If the real-time output of the flow meter is higher than 20mA, it is determined that the real-time output of the flow meter exceeds the measuring range.

[0080] S2: Based on the flow meter over-limit fault judgment, the flow meter dead count fault is judged;

[0081] In the embodiment of the present application, judging the flow meter dead count failure includes the following steps:

[0082] The industrial controller periodically reads the flow meter output value and compares the read value with the previous value;

[0083] If the absolute value of the difference exceeds 0.1%, the flow meter output is judged to be active;

[0084] If the absolute value of the difference is less than 0.1%, the flow meter output value is determined to be a dead number;

[0085] If the flow meter output value is determined to be active, the flow meter count value collected in real time is compared with the predicted flow value;

[0086] If the flow meter output value is determined to be a dead number, and the continuous delay of the flow meter dead number reaches 60s, the industrial controller output meter dead number fault.

[0087] S3: Based on the flow meter dead count fault judgment, the real-time collected flow meter count value is compared with the predicted flow value to obtain a comparison result;

[0088] In an embodiment of the present application, predicting the flow value includes the following steps:

[0089] By adjusting the real-time flow of the cooling system, the real-time pressure difference △P between the second pressure gauge and the first pressure gauge is calculated, and a linear curve of the change between the flow and the pressure difference is fitted;

[0090] Convert the fitted linear curve into a curve equation through programming language;

[0091] The curve equation is introduced into the prediction model of the industrial controller, and the actual pressure difference between the second pressure gauge and the first pressure gauge after the curve equation is introduced is calculated to obtain the predicted flow value under the corresponding pressure difference.

[0092] In the embodiment of the present application, the curve equation is expressed as:

[0093] y=ax 2 +bx+c;

[0094] Among them, y represents the predicted flow value under the corresponding pressure difference, x represents the actual pressure difference between the second pressure gauge and the first pressure gauge, a represents the quadratic term coefficient, b represents the linear term coefficient, and c represents the constant term.

[0095] S4: Based on the comparison result between the real-time collected flow meter count value and the predicted flow value, according to the flow meter fault judgment strategy, the flow meter deviation fault is judged to realize the flow meter multiple fault judgment.

[0096] In the embodiments of the present application, Figure 2 As shown, the flow meter fault judgment strategy includes the following steps:

[0097] Compare the real-time collected flow meter count value with the predicted flow value;

[0098] If the flow deviation percentage does not exceed the preset range of the flow deviation percentage, the flow meter count value collected in real time is compared with the predicted flow value again;

[0099] If the flow deviation percentage has exceeded the preset range of the flow deviation percentage, it is determined whether the duration of the flow deviation percentage exceeding the range reaches the preset delay;

[0100] If the flow deviation percentage has exceeded the preset range of the flow deviation percentage, but the duration of the flow deviation percentage exceeding the range does not reach the preset delay, then return to re-compare the real-time collected flow meter count value with the predicted flow value;

[0101] If the flow deviation percentage has exceeded the preset range of the flow deviation percentage, and the flow deviation percentage exceeds the range for a duration reaching the preset delay, the industrial controller outputs a meter deviation fault;

[0102] If the flow deviation percentage is less than -5%, it is determined to be beyond the preset range of flow deviation percentage;

[0103] If the flow deviation percentage is greater than 5%, it is determined to be beyond the preset range of flow deviation percentage;

[0104] If the flow deviation percentage continues to be delayed for 10s, it is determined that the flow deviation percentage exceeds the range and lasts for a preset delay.

[0105] In the embodiment of the present application, the flow deviation percentage D is expressed as:

[0106] D=(L r -L p ) / L p *100%

[0107] Among them, L r Indicates real-time collection of flow value, L p Indicates the predicted flow value.

[0108] This embodiment also provides a flow meter fault determination system, including:

[0109] An over-limit fault judgment module is used to obtain the real-time output of the flow meter and judge the over-limit fault of the flow meter;

[0110] A dead number fault judgment module is used to judge the dead number fault of the flow meter based on the flow meter over-limit fault judgment;

[0111] A comparison module is used to compare the real-time collected flow meter count value with the predicted flow value based on the flow meter dead count fault judgment to obtain a comparison result;

[0112] The deviation fault judgment module is used to judge the deviation fault of the flow meter based on the comparison result of the real-time collected flow meter count value and the predicted flow value, according to the flow meter fault judgment strategy, to realize the multiple fault judgment of the flow meter.

[0113] Furthermore, it also includes:

[0114] Memory, used to store programs;

[0115] A processor is used to load the program to execute the flow meter fault determination method.

[0116] This embodiment also provides a computer-readable storage medium storing a program, and when the program is executed by a processor, the flow meter fault determination method is implemented.

[0117] The storage medium proposed in this embodiment and the flow meter fault determination method proposed in the above embodiment belong to the same inventive concept. The technical details not fully described in this embodiment can be referred to the above embodiment, and this embodiment has the same beneficial effects as the above embodiment.

[0118] Through the above description of the implementation methods, the technicians in the relevant field can clearly understand that the present invention can be implemented by means of software and necessary general hardware, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ReadOnly, Memory, ROM), random access memory (RandomAccess Memory, RAM), flash memory (FLASH), hard disk or optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform the methods of various embodiments of the present invention.

[0119] Example 2

[0120] Refer to Table 1 and Figure 4 , which is an embodiment of the present invention, provides a flow meter fault judgment method. In order to verify its beneficial effects, scientific demonstration is carried out through specific implementation methods and implementation effects.

[0121] The present embodiment is as follows:

[0122] This embodiment also proposes a method for determining flow meter failure by using a pressure meter, including:

[0123] Step 1: The cooling medium in the fluid cooling system of this embodiment is pure water, and the rated flow rate of the system is 446L / min. The flow rate is slowly reduced from the maximum by adjusting the system valve. During this period, multiple sets of data are recorded, and the data content is the pressure difference △P between the second pressure gauge and the first pressure gauge. 1 ~△P n , corresponding flow rate under pressure difference L 1 ~L n , this embodiment records 5 groups of data, and the specific data are shown in Table 1 below.

[0124] Table 1 Data sampling table

[0125] Pressure difference △P Flow rate L 0.74 351.78 0.71 402.78 0.67 445.80 0.62 486.64 0.56 532.43

[0126] Import the data in the table above into the simulation software MATLAB, enter the code, and use the curve fitter to fit the data. Define the horizontal axis change as flow rate L, and the vertical axis change as pressure difference △P. Among them, select quadratic for the fitting type, select 4 for the effective number of fitting results, and the fitting results are as follows Figure 4 As shown, it is a smooth linear curve, and the curve equation is: y = -2.855e-06x 2 +0.001517x+0.5605.

[0127] Step 2: Import the curve equation of the data fitting in step 1 into the industrial controller as the algorithm basis of the flow prediction model. The industrial controller collects the output of the flow meter, the first pressure meter, and the second pressure meter in real time. The real-time pressure difference △P between the second pressure meter and the first pressure meter is used as the x value of the curve equation of the flow prediction model, and the calculated y value is the predicted flow value under the corresponding pressure difference.

[0128] Combination Figure 2 , the flow meter fault judgment strategy includes the following steps:

[0129] The industrial controller collects the output of the flow meter in real time and determines whether the meter output exceeds the 4-20mA range. If the meter exceeds the range for a certain delay, the industrial controller outputs "meter over-limit fault";

[0130] In this embodiment, the continuous delay of the meter exceeding the range is preset to 10s; if the meter is within the range, it is determined whether the meter output is a dead number;

[0131] According to the method of the industrial controller itself for determining the dead number of the flow meter output, determine whether the meter output is a dead number. If the meter outputs a dead number for a certain delay, the industrial controller outputs 'meter dead number fault'. In this embodiment, the preset delay of the meter dead number is 60s; if the meter output is not a dead number, execute step 3.

[0132] Step 3, the industrial controller compares the real-time collected flow meter count value with the predicted flow value in step 2. In this embodiment, the real-time collected flow value is defined as Lr, and the predicted flow value is defined as Lp. The real-time flow deviation percentage D is defined as (Lr-Lp) / Lp*100%. In this embodiment, the preset flow deviation percentage reasonable range is -3% to 3%, and the preset flow deviation percentage continuous delay is 10s. If D does not exceed the preset reasonable range of the deviation percentage, that is, -3%≤D≤3%, then re-execute step 3; if D has exceeded the preset reasonable range of the deviation percentage, that is, D<-3% or D>3%, but the deviation time does not last for more than 10 seconds, then re-execute step 3; if D has exceeded the preset reasonable range of the deviation percentage, that is, D<-3% or D>3%, and the deviation time lasts for more than 10 seconds, then the industrial controller outputs 'meter deviation fault'.

[0133] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A flow meter fault determination method, characterized in that: include: Obtain the real-time output of the flow meter and judge the flow meter over-limit fault; Based on the flow meter over-limit fault judgment, the flow meter dead number fault is judged; Based on the flow meter dead count fault judgment, the real-time collected flow meter count value is compared with the predicted flow value to obtain the comparison result; Based on the comparison result between the real-time collected flow meter count value and the predicted flow value, the flow meter deviation fault is judged according to the flow meter fault judgment strategy, so as to realize the flow meter multiple fault judgment.

2. The flow meter fault determination method according to claim 1, characterized in that: The method of judging the flow meter over-limit fault comprises the following steps: If the real-time output of the flow meter does not exceed the measuring range, it is determined whether the real-time output of the flow meter is a dead number; If the real-time output of the flow meter exceeds the range, and the flow meter exceeds the range for a continuous delay of 10s, the industrial controller output meter exceeds the limit fault; If the real-time output of the flow meter is lower than 4mA, it is determined that the real-time output of the flow meter exceeds the range; If the real-time output of the flow meter is higher than 20mA, it is determined that the real-time output of the flow meter exceeds the measuring range.

3. The flow meter fault determination method according to claim 1 or 2, characterized in that: The method for judging the flow meter dead count failure comprises the following steps: The industrial controller periodically reads the flow meter output value and compares the read value with the previous value; If the absolute value of the difference exceeds 0.1%, the flow meter output is judged to be active; If the absolute value of the difference is less than 0.1%, the flow meter output value is determined to be a dead number; If the flow meter output value is determined to be active, the flow meter count value collected in real time is compared with the predicted flow value; If the flow meter output value is determined to be a dead number, and the continuous delay of the flow meter dead number reaches 60s, the industrial controller output meter dead number fault.

4. The flow meter fault determination method according to claim 3, characterized in that: The predicted flow value comprises the following steps: By adjusting the real-time flow of the cooling system, the real-time pressure difference △P between the second pressure gauge and the first pressure gauge is calculated, and a linear curve of the change between the flow and the pressure difference is fitted; Convert the fitted linear curve into a curve equation through programming language; The curve equation is introduced into the prediction model of the industrial controller, and the actual pressure difference between the second pressure gauge and the first pressure gauge after the curve equation is introduced is calculated to obtain the predicted flow value under the corresponding pressure difference.

5. The flow meter fault determination method according to claim 4, characterized in that: The curve equation is expressed as: y=ax 2 +bx+c; Among them, y represents the predicted flow value under the corresponding pressure difference, x represents the actual pressure difference between the second pressure gauge and the first pressure gauge, a represents the quadratic term coefficient, b represents the linear term coefficient, and c represents the constant term.

6. The flow meter fault determination method according to claim 5, characterized in that: The flow meter fault judgment strategy comprises the following steps: Compare the real-time collected flow meter count value with the predicted flow value; If the flow deviation percentage does not exceed the preset range of the flow deviation percentage, the flow meter count value collected in real time is compared with the predicted flow value again; If the flow deviation percentage has exceeded the preset range of the flow deviation percentage, it is determined whether the duration of the flow deviation percentage exceeding the range reaches the preset delay; If the flow deviation percentage has exceeded the preset range of the flow deviation percentage, but the duration of the flow deviation percentage exceeding the range does not reach the preset delay, then return to re-compare the real-time collected flow meter count value with the predicted flow value; If the flow deviation percentage has exceeded the preset range of the flow deviation percentage, and the flow deviation percentage exceeds the range for a duration reaching the preset delay, the industrial controller outputs a meter deviation fault; If the flow deviation percentage is less than -5%, it is determined to be beyond the preset range of flow deviation percentage; If the flow deviation percentage is greater than 5%, it is determined to be beyond the preset range of flow deviation percentage; If the flow deviation percentage continues to be delayed for 10s, it is determined that the flow deviation percentage exceeds the range and lasts for a preset delay.

7. The flow meter fault determination method according to claim 6, characterized in that: The flow deviation percentage D is expressed as: D=(L r -L p ) / L p *100% Among them, L r Indicates real-time collection of flow value, L p Indicates the predicted flow value.

8. A system based on the flow meter fault determination method according to claim 1, characterized in that: An over-limit fault judgment module is used to obtain the real-time output of the flow meter and judge the over-limit fault of the flow meter; A dead number fault judgment module is used to judge the dead number fault of the flow meter based on the flow meter over-limit fault judgment; A comparison module is used to compare the real-time collected flow meter count value with the predicted flow value based on the flow meter dead count fault judgment to obtain a comparison result; The deviation fault judgment module is used to judge the deviation fault of the flow meter based on the comparison result of the real-time collected flow meter count value and the predicted flow value, according to the flow meter fault judgment strategy, to realize the multiple fault judgment of the flow meter.

9. An electronic device, characterized in that: include: Memory, used to store programs; A processor is used to load the program to execute the steps of the flow meter fault determination method as described in any one of claims 1 to 7.

10. A computer-readable storage medium storing a program, characterized in that: When the program is executed by a processor, the steps of the flow meter fault determination method according to any one of claims 1 to 7 are implemented.

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