CN114880790A - Variable working condition mechanism modeling method and system for steam-driven induced draft fan and storage medium - Google Patents

Variable working condition mechanism modeling method and system for steam-driven induced draft fan and storage medium Download PDF

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CN114880790A
CN114880790A CN202210366264.3A CN202210366264A CN114880790A CN 114880790 A CN114880790 A CN 114880790A CN 202210366264 A CN202210366264 A CN 202210366264A CN 114880790 A CN114880790 A CN 114880790A
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induced draft
actual
draft fan
steam
pressure energy
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包能胜
蔡国忠
罗肇鹏
李毅杰
范宇晨
陈韶华
张永艺
史义明
陈旻
刘佳利
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Shantou University
Huaneng Shantou Haimen Power Generation Co Ltd
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Huaneng Shantou Haimen Power Generation Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
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Abstract

The invention discloses a variable working condition mechanism modeling method, a variable working condition mechanism modeling system and a storage medium of a steam-driven draught fan, wherein the method comprises the following steps: acquiring a historical database generated by the operation of a steam-driven draught fan in a past specific time period; fitting an actual inlet flow change curve by using a historical database with coal quality and unit load as influence factors; fitting an actual specific pressure energy change curve by using a historical database with the guide vane opening and the actual inlet flow as influence factors; fitting an actual rotating speed change curve by using a historical database by taking the opening degree of the guide vane and the actual specific pressure energy as influence factors; based on a similar principle followed by the variable-speed operation of the induced draft fan, converting and fusing an actual inlet flow change curve, an actual specific pressure energy change curve and an actual rotating speed change curve to obtain a variable-speed operation characteristic curve graph; and extracting and fitting a design specific pressure energy mathematical model and an operation efficiency mathematical model from the variable speed operation characteristic curve graph. The method and the device can improve the evaluation reliability of the operation efficiency of the steam-driven draught fan.

Description

Variable working condition mechanism modeling method and system for steam-driven induced draft fan and storage medium
Technical Field
The invention relates to the technical field of control of a steam-driven draught fan of a power plant, in particular to a variable working condition mechanism modeling method and system of the steam-driven draught fan and a storage medium.
Background
In order to reduce the service power rate, save raw coal and avoid the problems of large starting current, low service voltage and the like generated by the driving of a motor of a million units induced draft fan, the steam-driven induced draft fan is put into practical application in large-scale thermal power units in China at present. In order to enable the steam-driven draught fan to achieve the optimal operation efficiency, technicians collect a large amount of operation data when the steam-driven draught fan operates to estimate the configuration relation of the unit load, the rotating speed and the guide vane opening degree of the steam-driven draught fan at the optimal operation efficiency.
The operation efficiency of the steam-driven draught fan is actually closely related to the flow characteristic of smoke, the characteristic of a flue pipeline and the performance of the draught fan, wherein the flow characteristic of the smoke and the characteristic of the flue pipeline are influenced by coal quality, and the performance of the draught fan is influenced by unit load.
Disclosure of Invention
The invention provides a variable working condition mechanism modeling method, a variable working condition mechanism modeling system and a storage medium for a steam-driven induced draft fan, which are used for solving one or more technical problems in the prior art and at least providing a beneficial selection or creation condition.
The embodiment of the invention provides a variable working condition mechanism modeling method for a steam-driven draught fan, which comprises the following steps:
acquiring a historical database generated by the operation of a steam-driven draught fan in a past specific time period;
the actual inlet flow change curve of the induced draft fan is obtained by fitting the historical database by taking the coal quality and the unit load as influence factors;
taking the opening degree of the guide vane and the actual inlet flow as influence factors, and fitting by using the historical database to obtain an actual specific pressure energy change curve of the induced draft fan;
the actual rotating speed change curve of the induced draft fan is obtained by utilizing the historical database to fit by taking the opening degree of the guide vane and the actual specific pressure energy as influence factors;
based on a similar principle followed by the variable-speed operation of the induced draft fan, converting and fusing the actual inlet flow change curve, the actual specific pressure energy change curve and the actual rotating speed change curve to obtain a variable-speed operation characteristic curve chart of the induced draft fan;
and extracting and fitting a design specific pressure energy mathematical model and an operation efficiency mathematical model of the induced draft fan from the variable speed operation characteristic curve graph.
Further, the obtaining of the historical database generated by the operation of the steam-driven induced draft fan in the past specific time period comprises:
calling an initial historical database generated by the operation of a steam-driven induced draft fan in a past specific time period;
and rejecting unqualified sample data contained in the initial historical database according to a preset normal value range of each index of the steam-driven induced draft fan in the operation process, so as to obtain an updated historical database.
Further, the actual inlet flow variation curve of the induced draft fan is as follows:
Q＝0.00027894L 2 -0.00013363C 2 +0.00021404LC-0.65031L+0.94638C+1335.6
wherein Q is the actual inlet flow, L is the unit load, and C is the coal quality.
Further, the actual specific pressure energy change curve of the induced draft fan is as follows:
P＝1.1664β 2 +0.029919Q 2 -0.261βQ+51.704β-17.82Q+4280.1
wherein, P is the actual specific pressure energy, beta is the guide vane opening degree, and Q is the actual inlet flow.
Further, the actual rotating speed variation curve of the induced draft fan is as follows:
n＝α(0.7331β 2 +0.000013658P 2 -0.0123βP-58.853β+1.0013P+4316.1)
wherein n is the actual rotating speed, alpha is the load section coefficient, P is the actual specific pressure energy, and beta is the guide vane opening.
Further, the similar principle followed when the induced draft fan operates at variable speed satisfies the following formula:
Figure BDA0003587243090000021
where Q is the actual inlet flow, Q 0 For design of inlet flow, n is the actual speed, n 0 For design speed, P is actual specific pressure energy, P 0 To design specific pressure energy.
Further, the design specific pressure energy mathematical model of the induced draft fan is as follows:
Figure BDA0003587243090000031
wherein, P 0 To design specific pressure energy, Q 0 For the design inlet flow, β is the guide vane opening.
Further, the mathematical model of the operating efficiency of the induced draft fan is as follows:
Figure BDA0003587243090000032
where eta is the operating efficiency, Q 0 To design the inlet flow, P 0 To design specific pressure energy.
In addition, an embodiment of the present invention further provides a system for modeling a variable working condition mechanism of a steam-driven induced draft fan, where the system includes:
the acquisition module is used for acquiring a historical database generated by the operation of the steam-driven induced draft fan in a past specific time period;
the first fitting module is used for fitting by using the historical database to obtain an actual inlet flow change curve of the induced draft fan by taking the coal quality and the unit load as influence factors;
the second fitting module is used for fitting by using the historical database to obtain an actual specific pressure energy change curve of the induced draft fan by taking the guide vane opening and the actual inlet flow as influence factors;
the third fitting module is used for fitting by using the historical database to obtain an actual rotating speed change curve of the induced draft fan by taking the opening degree of the guide vane and the actual specific pressure energy as influence factors;
the fusion module is used for converting and fusing the actual inlet flow change curve, the actual specific pressure energy change curve and the actual rotating speed change curve based on a similar principle followed by the variable-speed operation of the induced draft fan to obtain a variable-speed operation characteristic curve chart of the induced draft fan;
and the extraction module is used for extracting and fitting a design specific pressure energy mathematical model and an operating efficiency mathematical model of the induced draft fan from the variable speed operating characteristic curve graph.
In addition, the embodiment of the invention also provides a computer readable storage medium, wherein an application program is stored on the computer readable storage medium, and the application program is executed by a processor to realize the variable working condition mechanism modeling method of the steam-driven induced draft fan.
The invention has at least the following beneficial effects: by introducing two main factors of coal quality and unit load, a historical database generated by the operation of the steam-driven draught fan is used for carrying out fitting operation on a relevant curve, a final operation efficiency evaluation model is obtained by converting a similar principle followed by the variable-speed operation of the draught fan, and the unknown parameters covered by the model are less, so that the reliability of evaluation on the operation efficiency of the steam-driven draught fan can be improved.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.
FIG. 1 is a schematic flow chart of a modeling method for a variable working condition mechanism of a steam-driven induced draft fan in an embodiment of the invention;
FIG. 2 is a graph illustrating variable speed operation of an induced draft fan in an embodiment of the present invention;
fig. 3 is a schematic structural composition diagram of a steam-driven induced draft fan variable working condition mechanism modeling system in the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It is noted that while a division of functional blocks is depicted in the system diagram, and logical order is depicted in the flowchart, in some cases the steps depicted and described may be performed in a different order than the division of blocks in the system or the flowchart. The terms first, second and the like in the description and in the claims, and the drawings described above, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
Referring to fig. 1, fig. 1 is a schematic flow chart of a method for modeling a variable working condition mechanism of a steam-driven induced draft fan according to an embodiment of the present invention, where the method includes the following steps:
s101, acquiring a historical database generated by the operation of the steam-driven induced draft fan in a past specific time period.
In the implementation process, firstly, calling an initial historical database generated by the operation of a steam-driven induced draft fan in a past specific time period; and then, according to the normal value range of each index of the steam-driven induced draft fan in the operation process, removing unqualified sample data contained in the initial historical database to obtain an updated historical database, wherein each index comprises coal quality, unit load, actual inlet flow, guide vane opening, actual specific pressure energy and actual rotating speed.
Specifically, the rejecting process of unqualified sample data comprises the following steps: firstly, performing time correlation on all sample data contained in the initial historical database; secondly, acquiring each index value at the time t (t is more than or equal to 1), performing all rejection processing on each index value at the time t when at least one index value is judged to be not in the corresponding normal value range, and conversely, performing all retention on each index value at the time t when each index value is judged to be in the corresponding normal value range; and then obtaining each index value at the time of t +1, carrying out the same judgment, and so on until the data cleaning work of the initial historical database is completed.
And S102, fitting the historical database to obtain an actual inlet flow change curve of the induced draft fan by taking the coal quality and the unit load as influence factors.
Specifically, because the flue gas flow characteristic and the flue pipeline characteristic are related to coal quality used by a power plant, and the performance of the induced draft fan is related to unit load of the steam-driven induced draft fan, the embodiment of the invention aims to reduce the estimation deviation of the operating efficiency of the steam-driven induced draft fan, comprehensively considers the flue gas flow characteristic, the flue pipeline characteristic and the performance of the induced draft fan, takes the coal quality and the unit load as independent variables, and utilizes the historical database to construct an actual inlet flow change curve of the induced draft fan.
In the implementation process, a plurality of groups of first data sets at different moments are obtained from the historical database, wherein the first data sets comprise coal quality, unit load and actual inlet flow, and then an actual inlet flow change curve of the induced draft fan is fitted to be:
Q＝0.00027894L 2 -0.00013363C 2 +0.00021404LC-0.65031L+0.94638C+1335.6
in the formula: q is the actual inlet flow, L is the unit load, and C is the coal quality.
And S103, fitting the historical database to obtain an actual specific pressure energy change curve of the induced draft fan by taking the guide vane opening and the actual inlet flow as influence factors.
In the implementation process, a plurality of groups of second data sets at different moments are acquired from the historical database, wherein the second data sets comprise guide vane opening, actual inlet flow and actual specific pressure energy, and then the actual specific pressure energy change curve of the induced draft fan is fitted:
P＝1.1664β 2 +0.029919Q 2 -0.261βQ+51.704β-17.82Q+4280.1
in the formula: p is the actual specific pressure energy, beta is the opening of the guide vane, and Q is the actual inlet flow.
It should be noted that, because the range of the opening degree of the guide vane of the steam-driven induced draft fan is 0 to 100%, the plurality of groups of second data sets selected in the embodiment of the present invention at least cover each opening degree of the guide vane within the range of the opening degree of the guide vane and the associated actual inlet flow and actual specific pressure energy.
And S104, fitting the historical database to obtain an actual rotating speed change curve of the induced draft fan by taking the opening degree of the guide vane and the actual specific pressure energy as influence factors.
In the implementation process, follow acquire the third data set under the different moments of a plurality of groups in the historical database, wherein the third data set includes stator opening, actual specific pressure energy and actual rotational speed, and then fits out the actual rotational speed variation curve of draught fan does:
n＝α(0.7331β 2 +0.000013658P 2 -0.0123βP-58.853β+1.0013P+4316.1)
in the formula: n is the actual rotating speed, alpha is the load section coefficient, P is the actual specific pressure energy, and beta is the guide vane opening.
It should be noted that, in the embodiment of the present invention, the value of the load segmentation coefficient α is defined as follows: when the unit load generated by the steam-driven induced draft fan falls in the range that L is less than or equal to 450MW, the value of alpha is 1; when the unit load generated by the steam-driven induced draft fan is in the range that L is more than 450MW and less than or equal to 900MW, the value of alpha is 1.3167; when the unit load generated by the steam-driven induced draft fan is in the range of L >900MW, the value of alpha is 1.5208.
And S105, based on a similar principle followed by the variable-speed operation of the induced draft fan, converting and fusing the actual inlet flow change curve, the actual specific pressure energy change curve and the actual rotating speed change curve to obtain a variable-speed operation characteristic curve graph of the induced draft fan.
In the embodiment of the invention, the following formula is satisfied by the similar principle of the variable-speed operation of the induced draft fan:
Figure BDA0003587243090000061
where Q is the actual inlet flow, Q 0 For design of inlet flow, n is the actual speed, n 0 For design speed, P is actual specific pressure energy, P 0 To design specific pressure energy.
In the implementation process, according to the similar principle, when the induced draft fan operates at a variable speed, only the numerical changes of the rotating speed, the inlet flow and the specific pressure are influenced, but the equal opening degree line and the equal efficiency line before and after the induced draft fan operates at the variable speed are specified to be kept unchangedIndependent variable cross relation exists between the initial inlet flow variation curve and the initial specific pressure energy variation curve, and the two variation curves are fused to the same coordinate system to further construct inlet and outlet flow (m) 3 The functional relation among/s), specific pressure energy (Nm/kg), operating efficiency (%) and guide vane opening degree (°) is converted to obtain a variable speed operating characteristic curve chart of the induced draft fan, and the graph is shown in fig. 2.
And S106, extracting and fitting a design specific pressure energy mathematical model and an operation efficiency mathematical model of the induced draft fan from the variable speed operation characteristic curve graph.
In the implementation process, because the specific pressure can be relevant with stator aperture and entry flow, follow a plurality of data points are extracted from the variable speed operating characteristic curve graph, and each data point all corresponds stator aperture, entry flow and specific pressure ability, and then the fit is gone out the design specific pressure ability mathematical model of draught fan is:
Figure BDA0003587243090000071
wherein, P 0 To design specific pressure energy, Q 0 For the design inlet flow, β is the guide vane opening.
In the implementation process, because the operating efficiency is relevant with inlet flow and specific pressure, follow a plurality of data points are extracted from the variable speed operating characteristic curve graph, and each data point all corresponds inlet flow, specific pressure and operating efficiency, and then the operating efficiency mathematical model of the draught fan of fitting out is:
Figure BDA0003587243090000072
where eta is the operating efficiency, Q 0 To design the inlet flow, P 0 To design specific pressure energy.
In the embodiment of the invention, two main factors of coal quality and unit load are introduced, the historical database generated by the operation of the steam-driven draught fan is used for carrying out fitting operation on the relevant curve, the final operation efficiency evaluation model is obtained by conversion according to the similar principle followed by the variable-speed operation of the draught fan, and the unknown parameters covered by the model are less, so that the reliability of evaluation on the operation efficiency of the steam-driven draught fan can be improved.
Referring to fig. 3, fig. 3 is a schematic structural composition diagram of a steam-driven induced draft fan variable working condition mechanism modeling system according to an embodiment of the present invention, where the system includes the following components:
the acquiring module 201 is used for acquiring a historical database generated by the operation of the steam-driven induced draft fan in a past specific time period;
the first fitting module 202 is used for fitting the historical database to obtain an actual inlet flow change curve of the induced draft fan by taking the coal quality and the unit load as influence factors;
the second fitting module 203 is used for fitting by using the historical database to obtain an actual specific pressure energy change curve of the induced draft fan by taking the guide vane opening and the actual inlet flow as influence factors;
the third fitting module 204 is used for fitting by using the historical database to obtain an actual rotating speed change curve of the induced draft fan by taking the opening degree of the guide vane and the actual specific pressure energy as influence factors;
the fusion module 205 is configured to convert and fuse the actual inlet flow variation curve, the actual specific pressure energy variation curve, and the actual rotation speed variation curve based on a similar principle followed by the induced draft fan during variable speed operation to obtain a variable speed operation characteristic curve of the induced draft fan;
and the extraction module 206 is configured to extract a design specific pressure energy mathematical model and an operation efficiency mathematical model of the induced draft fan from the variable speed operation characteristic curve.
For specific limitations on each component module in the variable-operating-condition mechanism modeling system of the steam-driven draught fan, reference may be made to limitations on the variable-operating-condition mechanism modeling method of the steam-driven draught fan in the above embodiments, and details are not described here.
In addition, the embodiment of the invention further provides a computer readable storage medium, wherein an application program is stored on the computer readable storage medium, and when the application program is executed by a processor, the method for modeling the variable working condition mechanism of the steam-driven induced draft fan is realized.
One of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a central processing unit, digital signal processor, or microprocessor, or as hardware, or as integrated circuits. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). Computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to one of ordinary skill in the art.
While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and various equivalent modifications or substitutions can be made without departing from the spirit of the present invention and these are intended to be encompassed by the present invention as defined in the appended claims.

Claims (10)

1. A steam-driven induced draft fan variable working condition mechanism modeling method is characterized by comprising the following steps:
acquiring a historical database generated by the operation of a steam-driven draught fan in a past specific time period;
the actual inlet flow change curve of the induced draft fan is obtained by fitting the historical database by taking the coal quality and the unit load as influence factors;
taking the opening degree of the guide vane and the actual inlet flow as influence factors, and fitting by using the historical database to obtain an actual specific pressure energy change curve of the induced draft fan;
the actual rotating speed change curve of the induced draft fan is obtained by utilizing the historical database to fit by taking the opening degree of the guide vane and the actual specific pressure energy as influence factors;
based on a similar principle followed by the variable-speed operation of the induced draft fan, converting and fusing the actual inlet flow change curve, the actual specific pressure energy change curve and the actual rotating speed change curve to obtain a variable-speed operation characteristic curve chart of the induced draft fan;
and extracting and fitting a design specific pressure energy mathematical model and an operation efficiency mathematical model of the induced draft fan from the variable speed operation characteristic curve graph.
2. The method for modeling the variable-working-condition mechanism of the steam-driven draught fan according to claim 1, wherein the step of acquiring a historical database generated by the steam-driven draught fan operating in a past specific time period comprises the following steps:
calling an initial historical database generated by the operation of a steam-driven induced draft fan in a past specific time period;
and rejecting unqualified sample data contained in the initial historical database according to a preset normal value range of each index of the steam-driven induced draft fan in the operation process, so as to obtain an updated historical database.
3. The steam-driven induced draft fan variable working condition mechanism modeling method according to claim 1, wherein an actual inlet flow change curve of the induced draft fan is as follows:
Q＝0.00027894L 2 -0.00013363C 2 +0.00021404LC-0.65031L+0.94638C+1335.6
wherein Q is the actual inlet flow, L is the unit load, and C is the coal quality.
4. The steam-driven induced draft fan variable working condition mechanism modeling method according to claim 1, wherein an actual specific pressure energy change curve of the induced draft fan is as follows:
P＝1.1664β 2 +0.029919Q 2 -0.261βQ+51.704β-17.82Q+4280.1
wherein, P is the actual specific pressure energy, beta is the guide vane opening degree, and Q is the actual inlet flow.
5. The steam-driven induced draft fan variable working condition mechanism modeling method according to claim 1, wherein an actual rotating speed change curve of the induced draft fan is as follows:
n＝α(0.7331β 2 +0.000013658P 2 -0.0123βP-58.853β+1.0013P+4316.1)
wherein n is the actual rotating speed, alpha is the load section coefficient, P is the actual specific pressure energy, and beta is the guide vane opening.
6. The method for modeling the variable working condition mechanism of the steam-driven draught fan according to claim 1, wherein the similar principle followed when the draught fan operates at variable speed meets the following formula:
Figure FDA0003587243080000021
where Q is the actual inlet flow, Q 0 For design of inlet flow, n is the actual speed, n 0 For design speed, P is actual specific pressure energy, P 0 To design specific pressure energy.
7. The variable working condition mechanism modeling method of the steam-driven induced draft fan according to claim 1, wherein the design specific pressure energy mathematical model of the induced draft fan is as follows:
Figure FDA0003587243080000022
wherein, P 0 To design specific pressure energy, Q 0 For the design inlet flow, β is the guide vane opening.
8. The variable working condition mechanism modeling method of the steam-driven induced draft fan according to claim 1, wherein the mathematical model of the operation efficiency of the induced draft fan is as follows:
Figure FDA0003587243080000023
wherein eta is the operating efficiency, Q 0 To design the inlet flow, P 0 To design specific pressure energy.
9. The utility model provides a steam-driven draught fan variable working condition mechanism modeling system which characterized in that, the system includes:
the acquisition module is used for acquiring a historical database generated by the operation of the steam-driven induced draft fan in a past specific time period;
the first fitting module is used for fitting by using the historical database to obtain an actual inlet flow change curve of the induced draft fan by taking the coal quality and the unit load as influence factors;
the second fitting module is used for fitting by using the historical database to obtain an actual specific pressure energy change curve of the induced draft fan by taking the guide vane opening and the actual inlet flow as influence factors;
the third fitting module is used for fitting by using the historical database to obtain an actual rotating speed change curve of the induced draft fan by taking the opening degree of the guide vane and the actual specific pressure energy as influence factors;
the fusion module is used for converting and fusing the actual inlet flow change curve, the actual specific pressure energy change curve and the actual rotating speed change curve based on a similar principle followed by the variable-speed operation of the induced draft fan to obtain a variable-speed operation characteristic curve chart of the induced draft fan;
and the extraction module is used for extracting and fitting a design specific pressure energy mathematical model and an operating efficiency mathematical model of the induced draft fan from the variable speed operating characteristic curve graph.
10. A computer-readable storage medium having an application program stored thereon, wherein the application program, when executed by a processor, implements the method for modeling the behavior of a steam-driven induced draft fan according to any one of claims 1 to 8.
CN202210366264.3A 2022-04-08 2022-04-08 Variable working condition mechanism modeling method and system for steam-driven induced draft fan and storage medium Pending CN114880790A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116434372A (en) * 2023-06-12 2023-07-14 昆明理工大学 Intelligent data acquisition system and working condition identification system for variable working condition equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116434372A (en) * 2023-06-12 2023-07-14 昆明理工大学 Intelligent data acquisition system and working condition identification system for variable working condition equipment
CN116434372B (en) * 2023-06-12 2023-08-18 昆明理工大学 Intelligent data acquisition system and working condition identification system for variable working condition equipment

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