A self-testing method and device based on an image acquisition cooling system

Abstract

This application provides a self-testing method and apparatus for an image acquisition cooling system, relating to the field of image acquisition technology. When executing the method, firstly, in response to the triggering of a self-test command, a self-test stabilization period and a self-test monitoring period corresponding to the command are determined. The self-test commands include instrument self-test commands, valve self-test commands, and cooler self-test commands. Then, in response to the end of the self-test stabilization period corresponding to the command, the equipment corresponding to the command is monitored during the self-test monitoring period to obtain the self-test result. Thus, by first determining the self-test stabilization period and the self-test monitoring period corresponding to the command, and then monitoring the equipment during the monitoring period after the stabilization period ends, a self-testing of the image acquisition cooling system can be achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of image acquisition, and particularly relates to a self-checking method and device based on an image acquisition cooling system. BACKGROUND

[0002] The bag-type dust collector has high dust removal efficiency, large air handling capacity and reliable operation, and has been widely applied in the fields of steel, cement, aluminum, non-ferrous metal and garbage incineration. The main reasons for the abnormal operation of the bag-type dust collector are filter bag damage and pulse valve failure, and the filter bag damage will lead to excessive smoke dust emission concentration, equipment forced shutdown and huge economic losses. Generally, whether the filter bag is damaged is determined by using an image acquisition device to acquire images and judging whether dust is overflowing from the filter bag opening, but the image acquisition device cannot normally operate in a high-temperature scene, and needs to be cooled by an image acquisition cooling system to ensure stable operation of the image acquisition device. However, if the image acquisition cooling system fails, the image acquisition device is difficult to operate stably, and in the prior art, the image acquisition cooling system cannot be self-checked to ensure that the image acquisition cooling system is fault-free.

[0003] To sum up, how to realize self-checking of the image acquisition cooling system is a problem to be solved by those skilled in the art. SUMMARY

[0004] Therefore, the present application provides a self-checking method and device based on an image acquisition cooling system, aiming to realize self-checking of the image acquisition cooling system.

[0005] In a first aspect, the present application provides a self-checking method based on an image acquisition cooling system, comprising:

[0006] In response to triggering of a self-checking instruction, a self-checking stable period and a self-checking monitoring period corresponding to the self-checking instruction are determined; the self-checking instruction includes an instrument self-checking instruction, a valve self-checking instruction and a cooler self-checking instruction;

[0007] In response to the end of the self-checking stable period corresponding to the self-checking instruction, a device corresponding to the self-checking instruction is monitored in the self-checking monitoring period corresponding to the self-checking instruction, and a self-checking result is obtained.

[0008] Optionally, in response to triggering of a self-checking instruction, a self-checking stable period and a self-checking monitoring period corresponding to the self-checking instruction are determined, comprising:

[0009] In response to triggering of a self-checking instruction, a self-checking monitoring period corresponding to the self-checking instruction is determined;

[0010] A time threshold value corresponding to the self-checking instruction is determined;

[0011] A time of previous valve adjustment is acquired;

[0012] if a time interval between a time of the previous valve adjustment and a time of the self-check instruction triggering is greater than or equal to a time threshold corresponding to the self-check instruction, determining a self-check stabilization period corresponding to the self-check instruction as 0;

[0013] if the time interval between the time of the previous valve adjustment and the time of the self-check instruction triggering is less than the time threshold corresponding to the self-check instruction, determining the time threshold corresponding to the self-check instruction as the self-check stabilization period corresponding to the self-check instruction.

[0014] Optionally, in response to an end of the self-check stabilization period corresponding to the self-check instruction, monitoring the device corresponding to the self-check instruction in a self-check monitoring period corresponding to the self-check instruction to obtain a self-check result, including:

[0015] in response to an end of the self-check stabilization period corresponding to the instrument self-check instruction, obtaining an instrument value of each instrument in a self-check monitoring period corresponding to the instrument self-check instruction;

[0016] in response to an end of the self-check monitoring period corresponding to the instrument self-check instruction, calculating an instrument value variation coefficient of each instrument according to the instrument value of each instrument;

[0017] determining an instrument with an instrument value variation coefficient greater than or equal to a variation coefficient threshold as a fault instrument.

[0018] Optionally, before the obtaining of the instrument value of each instrument, the method further includes:

[0019] numbering the each instrument;

[0020] The calculating of the instrument value variation coefficient of each instrument according to the instrument value of each instrument includes:

[0021] calculating the instrument value variation coefficient of each instrument according to the instrument value of each instrument in an order of the numbering of the instruments.

[0022] Optionally, in response to an end of the self-check stabilization period corresponding to the self-check instruction, monitoring the device corresponding to the self-check instruction in a self-check monitoring period corresponding to the self-check instruction to obtain a self-check result, including:

[0023] in response to an end of the self-check stabilization period of the valve self-check instruction, sequentially determining each valve as a target valve in a self-check monitoring period corresponding to the valve self-check instruction;

[0024] monitoring the target valve to obtain a self-check result of the target valve.

[0025] Optionally, the monitoring of the target valve to obtain a self-checking result comprises:

[0026] clearing the count corresponding to the target valve;

[0027] obtaining a first valve flow count value corresponding to the target valve;

[0028] adjusting the valve opening of the target valve by a preset valve opening adjustment value;

[0029] obtaining a second valve flow count value corresponding to the target valve with the adjusted valve opening;

[0030] calculating a first valve flow count value change value according to the first valve flow count value and the second valve flow count value;

[0031] if the first valve flow count value change value is greater than a valve flow count value change threshold, adding 1 to the count corresponding to the target valve;

[0032] if the first valve flow count value change value is less than or equal to the valve flow count value change threshold, keeping the count corresponding to the target valve unchanged;

[0033] adjusting the valve opening of the target valve by the preset valve opening adjustment value;

[0034] obtaining a third valve flow count value corresponding to the target valve with the adjusted valve opening;

[0035] calculating a second valve flow count value change value according to the first valve flow count value and the third valve flow count value;

[0036] if the second valve flow count value change value is greater than the valve flow count value change threshold, adding 2 to the count corresponding to the target valve;

[0037] if the second valve flow count value change value is less than or equal to the valve flow count value change threshold, keeping the count corresponding to the target valve unchanged;

[0038] if the count corresponding to the target valve is 3, determining that the self-checking result of the target valve is no fault;

[0039] if the count corresponding to the target valve is 2, determining that the self-checking result of the target valve is a valve opening adjustment decrease fault;

[0040] if the count corresponding to the target valve is 1, determining that the self-checking result of the target valve is a valve opening adjustment increase fault;

[0041] If the count corresponding to the target valve is 0, it is determined that the self-checking result of the target valve is a valve opening degree adjustment failure.

[0042] Optionally, in response to the end of the self-checking stable period corresponding to the self-checking instruction, the device corresponding to the self-checking instruction is monitored in the self-checking monitoring period corresponding to the self-checking instruction to obtain a self-checking result, including:

[0043] In response to the end of the self-checking stable period of the cooler self-checking instruction, each cooler is sequentially determined as a target cooler in the self-checking monitoring period corresponding to the cooler self-checking instruction.

[0044] The target cooler is monitored to obtain a self-checking result of the target cooler.

[0045] Optionally, the target cooler is monitored to obtain a self-checking result of the target cooler, including:

[0046] The count corresponding to the target cooler is cleared;

[0047] A first cooler outlet temperature count value corresponding to the target cooler is obtained;

[0048] The load of the target cooler is adjusted by a preset load adjustment value;

[0049] A second cooler outlet temperature count value corresponding to the target cooler with the adjusted load is obtained;

[0050] A first cooler outlet temperature count value change value is calculated according to the first cooler outlet temperature count value and the second cooler outlet temperature count value;

[0051] If the first cooler outlet temperature count value change value is greater than a cooler outlet temperature count value change threshold value, the count corresponding to the target cooler is added by 1;

[0052] If the first cooler outlet temperature count value change value is less than or equal to the cooler outlet temperature count value change threshold value, the count corresponding to the target cooler is kept unchanged;

[0053] The load of the target cooler is adjusted by the preset load adjustment value;

[0054] A third cooler outlet temperature count value corresponding to the target cooler with the adjusted load is obtained;

[0055] A second cooler outlet temperature count value change value is calculated according to the first cooler outlet temperature count value and the third cooler outlet temperature count value;

[0056] if the second cooler outlet temperature count value change value is greater than the cooler outlet temperature count value change threshold value, then the count corresponding to the target cooler is accumulated by 2;

[0057] if the second cooler outlet temperature count value change value is less than or equal to the cooler outlet temperature count value change threshold value, then the count corresponding to the target cooler is kept unchanged;

[0058] if the count corresponding to the target cooler is 3, then it is determined that the self-checking result of the target cooler is no fault;

[0059] if the count corresponding to the target cooler is 2, then it is determined that the self-checking result of the target cooler is cooler load reduction fault;

[0060] if the count corresponding to the target cooler is 1, then it is determined that the self-checking result of the target cooler is cooler load increase fault;

[0061] if the count corresponding to the target cooler is 0, then it is determined that the self-checking result of the target cooler is cooler load adjustment fault.

[0062] Optionally, after the self-checking stable period and the self-checking monitoring period corresponding to the self-checking instruction are determined in response to the triggering of the self-checking instruction, the method further comprises:

[0063] in response to the re-triggering of the self-checking instruction, stopping self-checking.

[0064] In a second aspect, the present application provides a self-checking device based on an image acquisition cooling system, comprising:

[0065] a determination module, configured to determine a self-checking stable period and a self-checking monitoring period corresponding to a self-checking instruction in response to the triggering of the self-checking instruction; the self-checking instruction comprises an instrument self-checking instruction, a valve self-checking instruction and a cooler self-checking instruction;

[0066] a monitoring module, configured to monitor a device corresponding to the self-checking instruction to obtain a self-checking result in a self-checking monitoring period corresponding to the self-checking instruction in response to the end of the self-checking stable period corresponding to the self-checking instruction.

[0067] Optionally, the determination module comprises:

[0068] a first determination unit, configured to determine a self-checking monitoring period corresponding to the self-checking instruction in response to the triggering of the self-checking instruction;

[0069] a second determination unit, configured to determine a time threshold value corresponding to the self-checking instruction;

[0070] a first acquisition unit, configured to acquire a time of a previous valve adjustment;

[0071] The third determining unit is used to determine the self-test stability period corresponding to the self-test command as 0 if the time interval between the previous valve adjustment time and the self-test command trigger time is greater than or equal to the time threshold corresponding to the self-test command.

[0072] The fourth determining unit is used to determine the time threshold corresponding to the self-test command as the self-test stabilization period corresponding to the self-test command if the time interval between the previous valve adjustment time and the self-test command trigger time is less than the time threshold corresponding to the self-test command.

[0073] Optionally, the monitoring module includes:

[0074] The second acquisition unit is used to acquire the instrument value of each instrument during the self-test monitoring period corresponding to the instrument self-test command in response to the end of the self-test stabilization period.

[0075] The first calculation unit is used to calculate the coefficient of variation of the instrument value of each instrument based on the instrument value of each instrument in response to the end of the self-test monitoring period corresponding to the instrument self-test command.

[0076] The fifth determination unit is used to determine instruments whose value variation coefficient is greater than or equal to the variation coefficient threshold as faulty instruments.

[0077] Optionally, the device further includes:

[0078] A numbering unit is used to number each of the instruments;

[0079] The first computing unit is specifically used for;

[0080] Based on the instrument numbering order and the instrument value of each instrument, the coefficient of variation of the instrument value is calculated.

[0081] Optionally, the monitoring module includes:

[0082] The sixth determining unit is used to determine each valve as a target valve in sequence during the self-inspection monitoring period corresponding to the valve self-inspection command, in response to the end of the self-inspection stabilization period of the valve self-inspection command.

[0083] The first monitoring unit is used to monitor the target valve and obtain the self-inspection result of the target valve.

[0084] Optionally, the first monitoring unit includes:

[0085] The first count clearing subunit is used to clear the count corresponding to the target valve;

[0086] The first acquisition subunit is used to acquire the first valve flow count value corresponding to the target valve;

[0087] The valve opening reduction subunit is used to reduce the valve opening of the target valve by a preset valve opening adjustment value.

[0088] The second acquisition subunit is used to acquire the second valve flow count value corresponding to the target valve whose valve opening is reduced;

[0089] The first calculation subunit is used to calculate the change value of the first valve flow count based on the first valve flow count value and the second valve flow count value.

[0090] The first counting accumulation subunit is used to increment the count corresponding to the target valve by 1 if the change value of the first valve flow count is greater than the valve flow count change threshold.

[0091] The first count holding subunit is used to keep the count corresponding to the target valve unchanged if the change value of the first valve flow count is less than or equal to the valve flow count change threshold.

[0092] The valve opening adjustment subunit is used to increase the valve opening of the target valve by the preset valve opening adjustment value.

[0093] The third acquisition subunit is used to acquire the third valve flow count value corresponding to the target valve whose valve opening is increased;

[0094] The second calculation subunit is used to calculate the change value of the second valve flow count based on the first valve flow count value and the third valve flow count value.

[0095] The second counting accumulation subunit is used to increment the count corresponding to the target valve by 2 if the change value of the second valve flow count is greater than the valve flow count change threshold.

[0096] The second count holding subunit is used to keep the count corresponding to the target valve unchanged if the change value of the second valve flow count is less than or equal to the valve flow count change threshold.

[0097] The first determining subunit is used to determine that the self-test result of the target valve is fault-free if the count corresponding to the target valve is 3.

[0098] The second determining subunit is used to determine that if the count corresponding to the target valve is 2, the self-test result of the target valve is a valve opening reduction fault.

[0099] The third determining subunit is used to determine that if the count corresponding to the target valve is 1, the self-test result of the target valve is a valve opening increase fault.

[0100] The fourth determining subunit is used to determine that the self-test result of the target valve is a valve opening adjustment fault if the count corresponding to the target valve is 0.

[0101] Optionally, the monitoring module includes:

[0102] The seventh determining unit is used to determine each cooler as the target cooler in sequence during the self-test monitoring period corresponding to the cooler self-test command, in response to the end of the self-test stabilization period of the cooler self-test command.

[0103] The second monitoring unit is used to monitor the target cooler and obtain the self-test results of the target cooler.

[0104] Optionally, the second monitoring unit includes:

[0105] The second count clearing subunit is used to clear the count corresponding to the target cooler;

[0106] The fourth acquisition subunit is used to acquire the first cooler outlet temperature count value corresponding to the target cooler;

[0107] The load reduction subunit is used to reduce the load of the target cooler by a preset load adjustment value.

[0108] The fifth acquisition subunit is used to acquire the second cooler outlet temperature count value corresponding to the target cooler with reduced load;

[0109] The third calculation subunit is used to calculate the change value of the first cooler outlet temperature count based on the first cooler outlet temperature count value and the second cooler outlet temperature count value.

[0110] The third counting accumulation subunit is used to increment the count corresponding to the target cooler by 1 if the change value of the first cooler outlet temperature count is greater than the cooler outlet temperature count change threshold.

[0111] The third count holding subunit is used to keep the count corresponding to the target cooler unchanged if the change value of the first cooler outlet temperature count is less than or equal to the change threshold of the cooler outlet temperature count.

[0112] The load increase subunit is used to increase the load of the target cooler by the preset load adjustment value.

[0113] The sixth acquisition subunit is used to acquire the third cooler outlet temperature count value corresponding to the target cooler with increased load;

[0114] The fourth calculation subunit is used to calculate the change value of the second cooler outlet temperature count based on the first cooler outlet temperature count value and the third cooler outlet temperature count value.

[0115] The fourth counting accumulation subunit is used to increment the count corresponding to the target cooler by 2 if the change value of the second cooler outlet temperature count is greater than the cooler outlet temperature count change threshold.

[0116] The fourth count holding subunit is used to keep the count corresponding to the target cooler unchanged if the change value of the second cooler outlet temperature count is less than or equal to the change threshold of the cooler outlet temperature count.

[0117] The fifth determining subunit is used to determine that the self-test result of the target cooler is fault-free if the count corresponding to the target cooler is 3.

[0118] The sixth determining subunit is used to determine that if the count corresponding to the target cooler is 2, the self-test result of the target cooler is a cooler load reduction fault;

[0119] The seventh determining subunit is used to determine that the self-test result of the target cooler is a cooler load increase fault if the count corresponding to the target cooler is 1.

[0120] The eighth determining subunit is used to determine that the self-test result of the target cooler is a cooler load regulation fault if the count corresponding to the target cooler is 0.

[0121] Optionally, the device further includes:

[0122] The stop module is used to stop the self-test in response to the re-triggering of the self-test command.

[0123] This application provides a self-testing method for an image acquisition cooling system. When executing the method, firstly, in response to the triggering of a self-test command, a self-test stabilization period and a self-test monitoring period corresponding to the command are determined. The self-test commands include instrument self-test commands, valve self-test commands, and cooler self-test commands. Then, in response to the end of the self-test stabilization period corresponding to the command, the equipment corresponding to the command is monitored during the self-test monitoring period to obtain the self-test result. In this way, by first determining the self-test stabilization period and the self-test monitoring period corresponding to the command, and then monitoring the equipment during the monitoring period after the stabilization period ends, a self-testing of the image acquisition cooling system can be achieved. Attached Figure Description

[0124] To more clearly illustrate the technical solutions in this embodiment or the prior art, the drawings used in the description of the embodiment or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0125] Figure 1 A flowchart of a self-testing method based on an image acquisition cooling system provided in this application embodiment;

[0126] Figure 2 This is a schematic diagram of the structure of an image acquisition cooling system provided in an embodiment of this application;

[0127] Figure 3 This application provides a schematic diagram of the structure of a self-testing device based on an image acquisition and cooling system. Detailed Implementation

[0128] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. This application provides a self-testing method and apparatus based on an image acquisition cooling system, relating to the field of image acquisition technology. The above are merely examples and do not limit the application field of the methods and apparatus provided in this application.

[0129] Baghouse dust collectors are widely used in the steel, cement, aluminum, non-ferrous metals, and waste incineration industries due to their high dust removal efficiency, large air volume handling capacity, and reliable operation. The main causes of abnormal operation in baghouse dust collectors are filter bag damage and pulse valve malfunction. Filter bag damage leads to excessive dust emission concentrations in the flue gas, forced equipment shutdown, and significant economic losses. Generally, filter bag damage is determined by using image acquisition equipment to capture images and check for dust leakage from the filter bag openings. However, image acquisition equipment cannot operate normally in high-temperature environments and requires a cooling system to ensure stable operation. If the cooling system malfunctions, the image acquisition equipment will struggle to operate stably. Currently, there is no technology that can self-check the cooling system to ensure its proper functioning.

[0130] The inventors, through research, proposed the technical solution of this application. First, in response to the triggering of a self-test command, the inventors determine the corresponding self-test stabilization period and self-test monitoring period. The self-test commands include instrument self-test commands, valve self-test commands, and cooler self-test commands. Then, in response to the end of the self-test stabilization period corresponding to the self-test command, the inventors monitor the equipment corresponding to the self-test command during the self-test monitoring period to obtain the self-test results. In this way, by first determining the self-test stabilization period and self-test monitoring period corresponding to the self-test command, and then monitoring the equipment during the monitoring period after the self-test stabilization period ends, self-testing of the image acquisition cooling system can be achieved.

[0131] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all of them. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present application. It should be noted that, for ease of description, only the parts related to the invention are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of the present application can be combined with each other.

[0132] The method in this embodiment is used to... Figure 2 The image acquisition and cooling system shown performs a self-test. Figure 2 This is a schematic diagram of an image acquisition cooling system provided in an embodiment of this application. The image acquisition cooling system includes a main pipe, which comprises: a main pipe pressure regulating valve 1, a main pipe pressure gauge 2, a main pipe flow regulating valve 3, a main pipe flow meter 4, M branch pipe units 11, and a replaceable device 10, where M is a positive integer; the replaceable device is a vent or a circulating pump. The main pipe pressure regulating valve 1, the main pipe pressure gauge 2, the main pipe flow regulating valve 3, the main pipe flow meter 4, the branch pipe units 11, and the replaceable device 10 are connected sequentially, wherein the M branch pipe units 11 are connected side by side. Each branch pipe unit 11 includes: a branch pipe unit pressure regulating valve 5, a branch pipe unit flow meter 6, a cooler 7, a cooler outlet thermometer 8, and m branch pipes 9, where m is a positive integer. The branch pipe unit pressure regulating valve 5, the branch pipe unit flow meter 6, the cooler 7, the cooler outlet thermometer 8, and the branch pipes 9 are connected sequentially, wherein the m branch pipes 9 are connected side by side. Branch pipe 9 includes: equipment protective cover 911, equipment thermometer 912, cooling medium flow regulating valve 913, and cooling medium flow meter 914. Equipment protective cover 911, equipment thermometer 912, cooling medium flow regulating valve 913, and cooling medium flow meter 914 are connected in sequence.

[0133] See Figure 1 , Figure 1A flowchart of a self-testing method based on an image acquisition cooling system provided in this application embodiment includes:

[0134] S101: In response to the triggering of the self-test command, determine the self-test stabilization period and self-test monitoring period corresponding to the self-test command.

[0135] Self-test commands include: instrument self-test commands, valve self-test commands, and cooler self-test commands. In response to different self-test commands, a corresponding self-test stabilization period and self-test monitoring period are determined. The self-test stabilization period and self-test monitoring period differ for different self-test commands.

[0136] In some implementations, in response to the triggering of a self-test command, a self-test monitoring period corresponding to the self-test command is determined. This self-test monitoring period is a preset value, and the self-test monitoring period corresponding to different self-test commands is different. The self-test monitoring period corresponding to an instrument self-test command is the monitoring time for whether the instrument value is stable. Theoretically, the longer the better, but considering actual working conditions, it is generally 10 to 30 minutes, preferably 15 minutes. The self-test monitoring period corresponding to a valve self-test command is the monitoring time for whether the valve is faulty, generally 5 to 10 minutes, preferably 8 minutes. The self-test monitoring period corresponding to a cooler self-test command is the monitoring time for whether the cooler is faulty, generally 10 to 20 minutes, preferably 15 minutes.

[0137] In some of the methods described, the time of the previous valve adjustment can be obtained first. If the time interval between the previous valve adjustment time and the time of triggering the self-test command is greater than or equal to the time threshold corresponding to the self-test command, then the self-test stability period corresponding to the self-test command is determined to be 0. If the time interval between the previous valve adjustment time and the time of triggering the self-test command is less than the time threshold corresponding to the self-test command, then the time threshold corresponding to the self-test command is determined as the self-test stability period corresponding to the self-test command.

[0138] S102: In response to the end of the self-test stabilization period corresponding to the self-test command, during the self-test monitoring period corresponding to the self-test command, the device corresponding to the self-test command is monitored to obtain the self-test result.

[0139] In response to the self-test command, a self-test stabilization period begins. When the self-test stabilization period ends, the device corresponding to the self-test command is monitored during the self-test monitoring period to obtain the self-test results.

[0140] When the self-test command is an instrument self-test command, the instrument self-test begins in response to the trigger of the instrument self-test command. During the instrument self-test, the temperature control program is locked, and valve opening control and cooler load control cannot be performed. After all self-tests are completed, the temperature control program automatically unlocks. Pressing the stop instrument self-test button stops the instrument self-test, the temperature control program unlocks, and valve opening control and cooler load control can be performed. The specific method of instrument self-test is as follows: First, the instruments are numbered. After the self-test stabilization period ends, all instruments are monitored during the self-test monitoring period. After the self-test monitoring period ends, the coefficient of variation C1 of the instrument values ​​is calculated sequentially according to the instrument number. If the coefficient of variation C1 is greater than or equal to the coefficient of variation threshold W1, it indicates that the instrument is faulty; if the coefficient of variation C1 is less than the coefficient of variation threshold W1, it indicates that the instrument is normal. The coefficient of variation C1 is the ratio of the standard deviation to the average value of the instrument value. The threshold W1 for the coefficient of variation of instrument values ​​varies for different types of instruments. For example, the threshold W1 for the coefficient of variation of pressure gauge values ​​is generally 5 to 10%, preferably 5%; the threshold W1 for the coefficient of variation of flow meter values ​​is generally 5 to 10%, preferably 8%; and the threshold W1 for the coefficient of variation of thermometer values ​​is generally 8 to 15%, preferably 10%.

[0141] When the self-test command is a valve self-test command, the valve self-test begins in response to the trigger of the valve self-test command. After all valves have completed the self-test, the valve opening is automatically adjusted to the valve opening set before the self-test. After pressing the stop valve self-test button, the valve self-test stops, and the valve opening is adjusted to the valve opening set before the self-test. During the valve self-test, other valves do not operate except for the valve being tested. During the valve self-test, the valves of the main pipe, branch pipe units, and branch pipes within the branch pipe units are self-tested sequentially. After the self-test of all valves in a branch pipe unit is completed, the valves of the next branch pipe unit are self-tested. Specifically, each valve is taken as the target valve in sequence, and the target valve is monitored during the self-test monitoring period. The specific method is as follows: the counter corresponding to the target valve is cleared to zero, and the first valve flow count value e1 corresponding to the target valve is obtained. Then, the valve opening of the target valve is reduced by the preset valve opening adjustment value E. The preset valve opening adjustment value E is the change in valve opening during the self-test. In order to make the flow change significant but not affect the system cooling effect, E is generally taken as 1% to 5%, preferably 3%. Obtain the second valve flow count value e2 corresponding to the target valve with reduced valve opening. Based on the first valve flow count value and the second valve flow count value, calculate the change in the first valve flow count value. Here, e1 represents the valve flow rate before valve adjustment during the self-inspection monitoring period after the self-inspection stabilization period ends, and e2 represents the extreme value of the valve flow rate after valve adjustment during the self-inspection monitoring period. The calculation method for the change in the first valve flow count value is as follows:

[0142]

[0143] If the change in the flow count value of the first valve is greater than the valve flow count value change threshold e, then the count corresponding to the target valve is incremented by 1; if the change in the flow count value of the first valve is less than or equal to the valve flow count value change threshold e, then the count corresponding to the target valve remains unchanged. The valve flow count value change threshold e is the threshold for the change in the valve flow count value after normal valve adjustment, and it is related to the self-test valve regulating valve opening E and the original valve opening X. The calculation method is as follows:

[0144]

[0145] Where c is a correction factor, which is generally 0.3 to 0.7, and preferably 0.5.

[0146] The valve opening of the target valve is increased by a preset valve opening adjustment value E, and the third valve flow count value e2 corresponding to the increased valve opening is obtained. Based on the first valve flow count value and the third valve flow count value, the change in the second valve flow count value is calculated. The calculation method is the same as that for the first valve flow count value, and will not be repeated here. If the change in the second valve flow count value is greater than the valve flow count value change threshold e, the count corresponding to the target valve is incremented by 2; if the change in the second valve flow count value is less than or equal to the valve flow count value change threshold e, the count corresponding to the target valve remains unchanged.

[0147] Finally, if the count corresponding to the target valve is 3, the self-test result of the target valve is determined to be fault-free; if the count corresponding to the target valve is 2, the self-test result of the target valve is determined to be a valve opening reduction fault; if the count corresponding to the target valve is 1, the self-test result of the target valve is determined to be a valve opening increase fault; if the count corresponding to the target valve is 0, the self-test result of the target valve is determined to be a valve opening adjustment fault.

[0148] When the self-test command is a cooler self-test command, the cooler self-test begins in response to the command. After all coolers have completed their self-tests, the cooler load is automatically adjusted to the set load before the self-test. Pressing the stop cooler self-test button stops the self-test and adjusts the cooler load back to the set load. During the self-test, only the cooler under test operates. The cooler self-test sequentially checks the coolers in each branch pipe unit, and only after all coolers in one branch pipe unit have been tested does it proceed to the next branch pipe unit.

[0149] Specifically, each cooler is designated as a target cooler in turn, and monitoring is conducted during the self-test monitoring period. The specific method is as follows: The counter corresponding to the target cooler is reset to zero, and the first cooler outlet temperature count value d1 is obtained. Next, the load of the target cooler is reduced by a preset load adjustment value D, where D is the changed load of the cooler during self-test. To ensure that the cooler outlet temperature change is significant but does not affect the system cooling effect, E is generally taken as 1% to 3%, preferably 2%. The second cooler outlet temperature count value d2 corresponding to the target cooler with reduced load is obtained. Based on the first and second cooler outlet temperature count values, the change value of the first cooler outlet temperature count is calculated. Here, d1 is the cooler outlet temperature before load adjustment during the self-test monitoring period after the self-test stabilization period ends, and d2 is the cooler outlet temperature after load adjustment during the self-test monitoring period. The calculation method for the change value of the first cooler outlet temperature count is as follows:

[0150]

[0151] If the change in the outlet temperature count of the first cooler is greater than the threshold value d, the count corresponding to the target cooler is incremented by 1; if the change in the outlet temperature count of the first cooler is less than or equal to the threshold value d, the count corresponding to the target cooler remains unchanged. The threshold value d is the threshold for the change in the outlet temperature count after normal cooler load adjustment, and it is related to the self-checked load change D and the original cooler load Y. The calculation method is as follows:

[0152]

[0153] Where z is a correction coefficient, which is generally 0.5 to 0.9, and preferably 0.7.

[0154] Increase the load of the target cooler by a preset load adjustment value D, and obtain the outlet temperature count value d2 of the third cooler corresponding to the target cooler with a reduced load. Based on the outlet temperature count values ​​of the first and third coolers, calculate the change in the outlet temperature count value of the second cooler. The calculation method is the same as that for the first cooler, and will not be repeated here. If the change in the outlet temperature count value of the second cooler is greater than the threshold value d, increment the count corresponding to the target cooler by 2; if the change in the outlet temperature count value of the second cooler is less than or equal to the threshold value d, keep the count corresponding to the target cooler unchanged.

[0155] Finally, if the count corresponding to the target cooler is 3, the self-test result of the target cooler is determined to be fault-free; if the count corresponding to the target cooler is 2, the self-test result of the target cooler is determined to be a cooler load reduction fault; if the count corresponding to the target cooler is 1, the self-test result of the target cooler is determined to be a cooler load increase fault; if the count corresponding to the target cooler is 0, the self-test result of the target cooler is determined to be a cooler load adjustment fault.

[0156] In this embodiment, in response to the triggering of a self-test command, a self-test stabilization period and a self-test monitoring period corresponding to the self-test command are first determined. The self-test commands include instrument self-test commands, valve self-test commands, and cooler self-test commands. Then, in response to the end of the self-test stabilization period corresponding to the self-test command, the equipment corresponding to the self-test command is monitored during the self-test monitoring period to obtain the self-test result. Thus, by first determining the self-test stabilization period and the self-test monitoring period corresponding to the self-test command, and then monitoring the equipment during the monitoring period after the self-test stabilization period ends, a self-test of the image acquisition cooling system can be achieved.

[0157] The above are some specific implementations of the self-testing method based on an image acquisition cooling system provided in this application. Based on this, this application also provides a corresponding device. The device provided in this application will be described below from the perspective of functional modularity.

[0158] See Figure 3 , Figure 3 A self-testing device based on an image acquisition cooling system is provided for an embodiment of this application. The device 300 includes...

[0159] The determination module 310 is used to determine the self-test stabilization period and self-test monitoring period corresponding to the self-test command in response to the triggering of the self-test command; the self-test command includes instrument self-test command, valve self-test command and cooler self-test command;

[0160] The monitoring module 320 is used to monitor the device corresponding to the self-test command during the self-test monitoring period corresponding to the self-test command in response to the end of the self-test stabilization period corresponding to the self-test command, and obtain the self-test result.

[0161] Optionally, the determining module 210 includes:

[0162] The first determining unit is used to determine the self-test monitoring period corresponding to the self-test command in response to the triggering of the self-test command;

[0163] The second determining unit is used to determine the time threshold corresponding to the self-test command;

[0164] The first acquisition unit is used to acquire the time of the previous valve adjustment;

[0165] The third determining unit is used to determine the self-test stability period corresponding to the self-test command as 0 if the time interval between the previous valve adjustment time and the self-test command trigger time is greater than or equal to the time threshold corresponding to the self-test command.

[0166] The fourth determining unit is used to determine the time threshold corresponding to the self-test command as the self-test stabilization period corresponding to the self-test command if the time interval between the previous valve adjustment time and the self-test command trigger time is less than the time threshold corresponding to the self-test command.

[0167] Optionally, the monitoring module 320 includes:

[0168] The second acquisition unit is used to acquire the instrument value of each instrument during the self-test monitoring period corresponding to the instrument self-test command in response to the end of the self-test stabilization period.

[0169] The first calculation unit is used to calculate the coefficient of variation of the instrument value of each instrument based on the instrument value of each instrument in response to the end of the self-test monitoring period corresponding to the instrument self-test command.

[0170] The fifth determination unit is used to determine instruments whose value variation coefficient is greater than or equal to the variation coefficient threshold as faulty instruments.

[0171] Optionally, the device 300 further includes:

[0172] A numbering unit is used to number each of the instruments;

[0173] The first computing unit is specifically used for;

[0174] Based on the instrument numbering order and the instrument value of each instrument, the coefficient of variation of the instrument value is calculated.

[0175] Optionally, the monitoring module 320 includes:

[0176] The sixth determining unit is used to determine each valve as a target valve in sequence during the self-inspection monitoring period corresponding to the valve self-inspection command, in response to the end of the self-inspection stabilization period of the valve self-inspection command.

[0177] The first monitoring unit is used to monitor the target valve and obtain the self-inspection result of the target valve.

[0178] Optionally, the first monitoring unit includes:

[0179] The first count clearing subunit is used to clear the count corresponding to the target valve;

[0180] The first acquisition subunit is used to acquire the first valve flow count value corresponding to the target valve;

[0181] The valve opening reduction subunit is used to reduce the valve opening of the target valve by a preset valve opening adjustment value.

[0182] The second acquisition subunit is used to acquire the second valve flow count value corresponding to the target valve whose valve opening is reduced;

[0183] The first calculation subunit is used to calculate the change value of the first valve flow count based on the first valve flow count value and the second valve flow count value.

[0184] The first counting accumulation subunit is used to increment the count corresponding to the target valve by 1 if the change value of the first valve flow count is greater than the valve flow count change threshold.

[0185] The first count holding subunit is used to keep the count corresponding to the target valve unchanged if the change value of the first valve flow count is less than or equal to the valve flow count change threshold.

[0186] The valve opening adjustment subunit is used to increase the valve opening of the target valve by the preset valve opening adjustment value.

[0187] The third acquisition subunit is used to acquire the third valve flow count value corresponding to the target valve whose valve opening is increased;

[0188] The second calculation subunit is used to calculate the change value of the second valve flow count based on the first valve flow count value and the third valve flow count value.

[0189] The second counting accumulation subunit is used to increment the count corresponding to the target valve by 2 if the change value of the second valve flow count is greater than the valve flow count change threshold.

[0190] The second count holding subunit is used to keep the count corresponding to the target valve unchanged if the change value of the second valve flow count is less than or equal to the valve flow count change threshold.

[0191] The first determining subunit is used to determine that the self-test result of the target valve is fault-free if the count corresponding to the target valve is 3.

[0192] The second determining subunit is used to determine that if the count corresponding to the target valve is 2, the self-test result of the target valve is a valve opening reduction fault.

[0193] The third determining subunit is used to determine that if the count corresponding to the target valve is 1, the self-test result of the target valve is a valve opening increase fault.

[0194] The fourth determining subunit is used to determine that the self-test result of the target valve is a valve opening adjustment fault if the count corresponding to the target valve is 0.

[0195] Optionally, the monitoring module includes:

[0196] The seventh determining unit is used to determine each cooler as the target cooler in sequence during the self-test monitoring period corresponding to the cooler self-test command, in response to the end of the self-test stabilization period of the cooler self-test command.

[0197] The second monitoring unit is used to monitor the target cooler and obtain the self-test results of the target cooler.

[0198] Optionally, the second monitoring unit includes:

[0199] The second count clearing subunit is used to clear the count corresponding to the target cooler;

[0200] The fourth acquisition subunit is used to acquire the first cooler outlet temperature count value corresponding to the target cooler;

[0201] The load reduction subunit is used to reduce the load of the target cooler by a preset load adjustment value.

[0202] The fifth acquisition subunit is used to acquire the second cooler outlet temperature count value corresponding to the target cooler with reduced load;

[0203] The third calculation subunit is used to calculate the change value of the first cooler outlet temperature count based on the first cooler outlet temperature count value and the second cooler outlet temperature count value.

[0204] The third counting accumulation subunit is used to increment the count corresponding to the target cooler by 1 if the change value of the first cooler outlet temperature count is greater than the cooler outlet temperature count change threshold.

[0205] The third count holding subunit is used to keep the count corresponding to the target cooler unchanged if the change value of the first cooler outlet temperature count is less than or equal to the change threshold of the cooler outlet temperature count.

[0206] The load increase subunit is used to increase the load of the target cooler by the preset load adjustment value.

[0207] The sixth acquisition subunit is used to acquire the third cooler outlet temperature count value corresponding to the target cooler with increased load;

[0208] The fourth calculation subunit is used to calculate the change value of the second cooler outlet temperature count based on the first cooler outlet temperature count value and the third cooler outlet temperature count value.

[0209] The fourth counting accumulation subunit is used to increment the count corresponding to the target cooler by 2 if the change value of the second cooler outlet temperature count is greater than the cooler outlet temperature count change threshold.

[0210] The fourth count holding subunit is used to keep the count corresponding to the target cooler unchanged if the change value of the second cooler outlet temperature count is less than or equal to the change threshold of the cooler outlet temperature count.

[0211] The fifth determining subunit is used to determine that the self-test result of the target cooler is fault-free if the count corresponding to the target cooler is 3.

[0212] The sixth determining subunit is used to determine that if the count corresponding to the target cooler is 2, the self-test result of the target cooler is a cooler load reduction fault;

[0213] The seventh determining subunit is used to determine that the self-test result of the target cooler is a cooler load increase fault if the count corresponding to the target cooler is 1.

[0214] The eighth determining subunit is used to determine that the self-test result of the target cooler is a cooler load regulation fault if the count corresponding to the target cooler is 0.

[0215] Optionally, the device 300 further includes:

[0216] The stop module is used to stop the self-test in response to the re-triggering of the self-test command.

[0217] This application also provides corresponding devices and computer storage media for implementing the solutions provided in this application.

[0218] The device includes a memory and a processor. The memory stores instructions or code, and the processor executes the instructions or code to cause the device to perform the method described in any embodiment of this application.

[0219] The computer storage medium stores code, and when the code is run, the device running the code implements the method described in any embodiment of this application.

[0220] As can be seen from the above description of the embodiments, those skilled in the art can clearly understand that all or part of the steps in the methods of the above embodiments can be implemented by means of software plus a general-purpose hardware platform. Based on this understanding, the technical solution of this application can be embodied in the form of a software product. This computer software product can be stored in a storage medium, such as a read-only memory (ROM) / RAM, magnetic disk, optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, a server, or a network communication device such as a router) to execute the methods described in various embodiments or some parts of the embodiments of this application.

[0221] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0222] It should also be noted that the various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, for the device and apparatus embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can be referred to the description of the method embodiments. The apparatus embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separate. The components indicated as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of the solution in this embodiment according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0223] The above description is merely one specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A self-checking method for an image acquisition cooling system, characterized in that, The method comprises the following steps: in response to triggering of a self-check instruction, determining a self-check stable period and a self-check monitoring period corresponding to the self-check instruction; the self-check instruction comprises an instrument self-check instruction, a valve self-check instruction, and a cooler self-check instruction; in response to the end of the self-check stable period of the valve self-check instruction, determining each valve as a target valve in the self-check monitoring period corresponding to the valve self-check instruction; clearing the count corresponding to the target valve; obtaining a first valve flow count value corresponding to the target valve; adjusting the valve opening degree of the target valve by a preset valve opening degree adjustment value; obtaining a second valve flow count value corresponding to the target valve after adjusting the valve opening degree; calculating a first valve flow count value change value according to the first valve flow count value and the second valve flow count value; if the first valve flow count value change value is greater than a valve flow count value change threshold, adding 1 to the count corresponding to the target valve; if the first valve flow count value change value is less than or equal to the valve flow count value change threshold, keeping the count corresponding to the target valve unchanged; adjusting the valve opening degree of the target valve by the preset valve opening degree adjustment value; obtaining a third valve flow count value corresponding to the target valve after adjusting the valve opening degree; calculating a second valve flow count value change value according to the first valve flow count value and the third valve flow count value; if the second valve flow count value change value is greater than the valve flow count value change threshold, adding 2 to the count corresponding to the target valve; if the second valve flow count value change value is less than or equal to the valve flow count value change threshold, keeping the count corresponding to the target valve unchanged; if the count corresponding to the target valve is 3, determining that the self-check result of the target valve is no fault; if the count corresponding to the target valve is 2, determining that the self-check result of the target valve is a valve opening degree adjustment failure; if the count corresponding to the target valve is 1, determining that the self-check result of the target valve is a valve opening degree adjustment failure; if the count corresponding to the target valve is 0, determining that the self-check result of the target valve is a valve opening degree adjustment failure.

2. The method of claim 1, wherein, The method comprises the following steps: in response to triggering of a self-check instruction, determining a self-check stable period and a self-check monitoring period corresponding to the self-check instruction; the self-check instruction comprises an instrument self-check instruction, a valve self-check instruction, and a cooler self-check instruction; in response to triggering of a self-check instruction, determining a self-check monitoring period corresponding to the self-check instruction; determining a time threshold value corresponding to the self-check instruction; obtaining the time of the last valve adjustment; if the time interval between the time of the last valve adjustment and the time of triggering of the self-check instruction is greater than or equal to the time threshold value corresponding to the self-check instruction, determining the self-check stable period corresponding to the self-check instruction as 0; if the time interval between the time of the last valve adjustment and the time of triggering of the self-check instruction is less than the time threshold value corresponding to the self-check instruction, determining the time threshold value corresponding to the self-check instruction as the self-check stable period corresponding to the self-check instruction.

3. The method of claim 1, wherein, The method further comprises: monitoring the device corresponding to the self-checking instruction in a self-checking monitoring period corresponding to the self-checking instruction to obtain a self-checking result in response to the end of the self-checking stable period corresponding to the self-checking instruction, wherein the self-checking result comprises: obtaining the instrument value of each instrument in response to the end of the self-checking stable period corresponding to the instrument self-checking instruction in the self-checking monitoring period corresponding to the instrument self-checking instruction; calculating the instrument value variation coefficient of each instrument according to the instrument value of each instrument in response to the end of the self-checking monitoring period corresponding to the instrument self-checking instruction; 4. The method of claim 3, wherein, determining the instrument with the instrument value variation coefficient greater than or equal to the variation coefficient threshold as a fault instrument. The method further comprises: numbering each instrument before the step of obtaining the instrument value of each instrument; calculating the instrument value variation coefficient of each instrument according to the instrument value of each instrument in the order of the instrument number.

5. The method of claim 1, wherein, The method further comprises: monitoring the device corresponding to the self-checking instruction in a self-checking monitoring period corresponding to the self-checking instruction to obtain a self-checking result in response to the end of the self-checking stable period corresponding to the self-checking instruction, wherein the self-checking result comprises: determining each cooler as a target cooler in turn in the self-checking monitoring period corresponding to the cooler self-checking instruction in response to the end of the self-checking stable period corresponding to the cooler self-checking instruction; 6. The method of claim 5, wherein, monitoring the target cooler to obtain the self-checking result of the target cooler. The method further comprises: clearing the count corresponding to the target cooler; obtaining the first cooler outlet temperature count value corresponding to the target cooler; adjusting the load of the target cooler by a preset load adjustment value; obtaining the second cooler outlet temperature count value corresponding to the target cooler with the adjusted load; calculating the first cooler outlet temperature count value change value according to the first cooler outlet temperature count value and the second cooler outlet temperature count value; if the first cooler outlet temperature count value change value is greater than the cooler outlet temperature count value change threshold, then adding 1 to the count corresponding to the target cooler; if the first cooler outlet temperature count value change value is less than or equal to the cooler outlet temperature count value change threshold, then keeping the count corresponding to the target cooler unchanged; adjusting the load of the target cooler by the preset load adjustment value; obtaining the third cooler outlet temperature count value corresponding to the target cooler with the adjusted load; calculating the second cooler outlet temperature count value change value according to the first cooler outlet temperature count value and the third cooler outlet temperature count value; if the second cooler outlet temperature count value change value is greater than the cooler outlet temperature count value change threshold, then adding 2 to the count corresponding to the target cooler; if the second cooler outlet temperature count value change value is less than or equal to the cooler outlet temperature count value change threshold, then keeping the count corresponding to the target cooler unchanged; If the count corresponding to the target cooler is 3, it is determined that the self-checking result of the target cooler is no fault; If the count corresponding to the target cooler is 2, it is determined that the self-checking result of the target cooler is cooler load reduction fault; If the count corresponding to the target cooler is 1, it is determined that the self-checking result of the target cooler is cooler load increase fault; If the count corresponding to the target cooler is 0, it is determined that the self-checking result of the target cooler is cooler load adjustment fault.

7. The method of claim 1, wherein, After the determination of the self-checking stable period and the self-checking monitoring period corresponding to the self-checking instruction, the method further comprises: In response to the re-triggering of the self-checking instruction, stopping self-checking.

8. An apparatus for self-checking of an image acquisition cooling system, characterized in that Comprise: A determination module is configured to determine a self-checking stable period and a self-checking monitoring period corresponding to a self-checking instruction in response to the triggering of the self-checking instruction; the self-checking instruction comprises an instrument self-checking instruction, a valve self-checking instruction, and a cooler self-checking instruction; A monitoring module is configured to monitor equipment corresponding to the self-checking instruction to obtain a self-checking result in a self-checking monitoring period corresponding to the self-checking instruction in response to the end of the self-checking stable period corresponding to the self-checking instruction; The monitoring module comprises: A sixth determination unit is configured to determine each valve as a target valve in turn in a self-checking monitoring period corresponding to the valve self-checking instruction in response to the end of the self-checking stable period of the valve self-checking instruction; A first monitoring unit is configured to monitor the target valve to obtain a self-checking result of the target valve; The first monitoring unit comprises: A first count clearing subunit is configured to clear a count corresponding to the target valve; A first acquisition subunit is configured to acquire a first valve flow count value corresponding to the target valve; A valve opening degree reduction subunit is configured to reduce a valve opening degree of the target valve by a preset valve opening degree adjustment value; A second acquisition subunit is configured to acquire a second valve flow count value corresponding to the target valve with the reduced valve opening degree; A first calculation subunit is configured to calculate a first valve flow count value change value according to the first valve flow count value and the second valve flow count value; A first count accumulation subunit is configured to accumulate the count corresponding to the target valve by 1 if the first valve flow count value change value is greater than a valve flow count value change threshold value; A first count maintaining subunit is configured to maintain the count corresponding to the target valve unchanged if the first valve flow count value change value is less than or equal to the valve flow count value change threshold value; A valve opening degree increase subunit is configured to increase the valve opening degree of the target valve by the preset valve opening degree adjustment value; A third acquisition subunit is configured to acquire a third valve flow count value corresponding to the target valve with the increased valve opening degree; A second calculation subunit is configured to calculate a second valve flow count value change value according to the first valve flow count value and the third valve flow count value; A second count accumulation subunit is configured to accumulate the count corresponding to the target valve by 2 if the second valve flow count value change value is greater than the valve flow count value change threshold value; a second count maintaining subunit, configured to maintain the count corresponding to the target valve unchanged if the second valve flow count value change value is less than or equal to the valve flow count value change threshold value; a first determining subunit, configured to determine that the self-checking result of the target valve is fault-free if the count corresponding to the target valve is 3; a second determining subunit, configured to determine that the self-checking result of the target valve is a valve opening degree adjustment reduction fault if the count corresponding to the target valve is 2; a third determining subunit, configured to determine that the self-checking result of the target valve is a valve opening degree adjustment increase fault if the count corresponding to the target valve is 1; a fourth determining subunit, configured to determine that the self-checking result of the target valve is a valve opening degree adjustment fault if the count corresponding to the target valve is 0.

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