CN116006413B - Data processing method, device, equipment and storage medium of tower monitoring system - Google Patents
Data processing method, device, equipment and storage medium of tower monitoring system Download PDFInfo
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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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Abstract
The application provides a data processing method, a device, equipment and a storage medium of a tower monitoring system, which relate to the field of fan power generation and structure, and the method comprises the following steps: performing simulation calculation on the prestress applied by the bolt under the condition that the tower barrel is not loaded, and obtaining an initial strain value of the strain sensor; under the condition of natural operation of the tower, obtaining a strain detection value of a strain sensor; judging whether the tower is in a fault state according to the initial strain value and the strain detection value; wherein the fault condition comprises: the flange is in a non-disengaging state, the flange is in an outer ring disengaging state, the flange is in an inner ring disengaging state, the flange is in an outer ring seriously disengaging state and the flange is in an inner ring seriously disengaging state. The method can be used for an operation and maintenance personnel to directly identify a specific fault, and reduces the investigation burden of the operation and maintenance personnel.
Description
Technical Field
The application relates to the technical field of wind power generation and structures, in particular to a data processing method, a device, equipment and a storage medium of a tower monitoring system.
Background
The tower is a conical structure with a certain gradient and is used for supporting the head of the wind driven generator, and the tower is generally formed by a plurality of sections, and each section of tower is connected with one another through a flange surface formed by flanges. The flange is connected through the high-strength bolt connection pair, the state of the bolt plays an important role in the safety of the tower, and once the bolt is loosened, creeping and the like, the hidden danger of operation of the wind driven generator set is easily caused. In order to avoid failure of the bolts and potential damage or collapse of the tower, frequent inspection, maintenance and/or replacement of the bolts is necessary, and the periodic inspection operation and maintenance strategy of the bolt pretightening force is generally carried out once a half year.
The stress and strain monitoring is generally carried out by installing a '' type strain sensor along the axial direction and crossing the upper flange and the lower flange of the tower, the real-time deformation is compared with a preset threshold through a monitoring module, if the real-time deformation exceeds the preset threshold, an alarm gives an alarm, and the unit safety early warning is realized, but the simple mode of comparing the thresholds can only judge whether the current tower fails or not, and the operation and maintenance personnel are required to carry out specific troubleshooting on the failure later, so that the burden of the operation and maintenance personnel is increased.
Disclosure of Invention
In view of the above, an object of the embodiments of the present application is to provide a data processing method, apparatus, device and storage medium for a tower monitoring system, which can determine whether a flange is in a specific failure state such as a flange non-release state, a flange outer ring release state, a flange inner ring release state, a flange outer ring serious release state, and a flange inner ring serious release state according to an initial strain value and a strain detection value of a strain sensor, so as to solve the above technical problems.
In a first aspect, an embodiment of the present application provides a data processing method of a tower monitoring system, where the method is applied to a tower monitoring system for monitoring a tower; the tower monitoring system comprises a strain sensor, wherein the tower comprises a tower main body, a flange and bolts, and the flange comprises a top flange and a bottom flange; the flange is fixed on the inner wall of the tower cylinder main body through bolts; the strain sensor is connected with the top flange and the bottom flange and is used for detecting deformation of the flange under the prestress applied by the bolts; the method comprises the following steps: performing simulation calculation on the prestress applied by the bolt under the condition that the tower barrel is not loaded, and obtaining an initial strain value of the strain sensor; under the condition of natural operation of the tower, obtaining a strain detection value of the strain sensor; judging whether the tower barrel is in a fault state or not according to the initial strain value and the strain detection value; wherein the fault condition comprises: the flange is in a non-disengaging state, the flange is in an outer ring disengaging state, the flange is in an inner ring disengaging state, the flange is in an outer ring seriously disengaging state and the flange is in an inner ring seriously disengaging state.
In the implementation process, through analyzing and processing the data obtained by the strain sensor for measuring the prestress applied by the bolts at the flange connection positions, whether the tower barrel is in a fault state or not can be determined, and in which specific fault state is in, the potential safety risk can be found in time, the fault type corresponding to the safety risk is identified, the operation and maintenance personnel can directly identify the fault, the additional time is not required for troubleshooting what fault belongs to, and the troubleshooting burden of the operation and maintenance personnel is reduced.
Optionally, the determining whether the tower is in a fault state according to the initial strain value and the strain detection value includes: comparing the initial strain value with the strain detection value, and determining the fluctuation variation trend of the strain detection value; and judging whether the tower barrel is in a fault state according to the fluctuation change trend.
In the implementation process, the fault state of the tower barrel is judged by analyzing the trend of the change of the strain value data of the strain sensor, so that a large amount of calculation resources are saved, convenience and intuitiveness are realized, and the data processing efficiency of the strain sensor is improved.
Optionally, the judging whether the tower is in a fault state according to the fluctuation variation trend includes: and if the fluctuation variation trend is stable and leveled or slowly rises, judging that the tower barrel is in a flange non-disengaging state.
In the implementation process, by analyzing the trend of the change of the strain value data of the strain sensor, if the change trend is stable and leveled or slowly rises, the fault state of the tower can be determined as the flange non-disengaging state, so that a large amount of calculation resources are saved, convenience and intuitiveness are realized, and the data processing efficiency of the strain sensor is improved.
Optionally, after determining that the flange is in the flange non-disengagement state if the fluctuation variation trend is stable and flat or slowly rising, the method further includes: determining an initial prestress of the flange according to the initial strain value; and determining the value of the prestress loss after the preset proportion of the initial prestress is reached as a flange fault alarm threshold value.
In the implementation process, the alarm threshold value is set according to the calculated initial prestress, so that the degree of prestress loss can be determined more intuitively to alarm, and accidents and economic losses are avoided.
Optionally, the judging whether the tower is in a fault state according to the fluctuation variation trend includes: if the fluctuation variation trend is gradually reduced and then gradually increased, judging that the tower barrel is in an outer ring disengaging state of the flange; and/or if the fluctuation variation trend is gradually rising and then gradually falling, judging that the tower barrel is in the inner ring disconnecting state of the flange or the local and integral disconnecting state of the flange.
In the implementation process, by analyzing the trend of the change of the strain value data of the strain sensor, if the change trend gradually falls, gradually rises and gradually falls, the fault state of the tower can be correspondingly determined to be the outer ring disconnecting state of the flange and the inner ring disconnecting state of the flange or the local whole disconnecting state of the flange, so that a large amount of calculation resources are saved, convenience and intuitiveness are realized, and the data processing efficiency of the strain sensor is improved.
Optionally, the method further comprises: if the fluctuation variation trend is that transverse lines or irregular jumps appear after the flange gradually rises when the flange is in a non-disconnection state, judging that the tower barrel is in a serious disconnection state of an inner ring of the flange or a local and integral disconnection state of the flange; and/or if the fluctuation variation trend is that the transverse line or irregular jump occurs after the flange gradually descends in the non-disengaging state, judging that the tower barrel is in the serious disengaging state of the outer ring of the flange.
In the implementation process, through analyzing the trend of the change of the strain value data of the strain sensor, if the change trend is that a transverse line or irregular run-out occurs after the flange is gradually raised in the non-disengagement state or that the transverse line or irregular run-out occurs after the flange is gradually lowered in the non-disengagement state, the fault state of the tower can be correspondingly determined to be the inner ring serious disengagement state of the flange and the outer ring serious disengagement state of the flange, a large amount of calculation resources are saved, convenience and intuitiveness are realized, and the data processing efficiency of the strain sensor is improved.
Optionally, calculating the prestress applied by the bolt under the condition that the tower is not loaded to obtain an initial strain value of the strain sensor, including: applying preset prestress to the bolts in the constructed bolt flange model by a cooling method; calculating theoretical deformation of the flange in the bolt flange model at the mounting position of the strain sensor based on the preset prestress; and determining the theoretical deformation as an initial strain value of the strain sensor.
In the implementation process, the strain initial value after the strain sensor is installed can be determined by calculating by a method of establishing a simulation model and estimating by using a simple formula, and the alarm threshold value can be further calculated according to the strain initial value, so that the calculation accuracy is improved.
In a second aspect, an embodiment of the present application provides a data processing apparatus of a tower monitoring system, where the method is applied to a tower monitoring system that monitors a tower; the tower monitoring system comprises a strain sensor, wherein the tower comprises a tower main body, a flange and bolts, and the flange comprises a top flange and a bottom flange; the flange is fixed on the inner wall of the tower cylinder main body through bolts; the strain sensor is connected with the top flange and the bottom flange and is used for detecting deformation of the flange under the prestress applied by the bolts; the device comprises: the initial value calculation module is used for carrying out simulation calculation on the prestress applied by the bolt under the condition that the tower barrel is not loaded, so as to obtain an initial strain value of the strain sensor; the strain value detection module is used for acquiring a strain detection value of the strain sensor under the condition of natural operation of the tower; the fault judging module is used for judging whether the tower barrel is in a fault state or not according to the initial strain value and the strain detection value; wherein the fault condition comprises: the flange is in a non-disengaging state, the flange is in an outer ring disengaging state, the flange is in an inner ring disengaging state, the flange is in an outer ring seriously disengaging state and the flange is in an inner ring seriously disengaging state.
In a third aspect, an embodiment of the present application further provides an electronic device, including: a processor, a memory storing machine-readable instructions executable by the processor, which when executed by the processor perform the steps of the method described above when the electronic device is run.
In a fourth aspect, embodiments of the present application provide a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method described above.
In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and should not be considered as limiting the scope, and other related drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of a tower monitoring system according to an embodiment of the present application;
FIG. 2 is a schematic cross-sectional view of a top flange, a bottom flange and bolts of a tower monitoring system according to an embodiment of the present application;
FIG. 3 is a schematic flow chart of a data processing method of a tower monitoring system according to an embodiment of the present application;
FIG. 4 shows a fluctuation trend of a tower according to an embodiment of the present application;
FIG. 5 is a graph showing the trend of fluctuation of another tower according to the embodiment of the present application;
FIG. 6 is a flange disengaged condition of a tower according to an embodiment of the present application;
FIG. 7 is a schematic diagram of functional modules of a data processing device of a tower monitoring system according to an embodiment of the present application;
fig. 8 is a block schematic diagram of an electronic device of a data processing apparatus of a tower monitoring system according to an embodiment of the present application.
Icon: 01-a tower monitoring system; a 10-strain sensor; 20-tower drum; 30-a flange; 40-bolts; 31-top flange; 32-a bottom flange; 210-calculating an initial value module; 220-a strain value detection module; 230-judging a fault module; 300-an electronic device; 311-memory; 312-a storage controller; 313-processor; 314-peripheral interface; 315-an input-output unit; 316-display unit.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present application.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. The terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.
The inventor notices that the pretightening force of the anchor bolt in the wind power industry is a very concerned problem of operation and maintenance personnel. The pre-tightening force of the anchor bolt is usually monitored by manual check-up or by using an anchor bolt pressure ring. However, manual fixed inspection cannot achieve real-time performance, and often before fixed inspection, the anchor bolts are loosened to cause safety accidents; the pressure ring can only monitor one anchor bolt at a time, one flange 30 can be connected with hundreds of anchor bolts, and the cost for all the pressure rings is too high; in addition, many wind towers which are built well are not designed without considering the installation of pressure rings, the length of the anchor bolts is slightly short, and enough length is not reserved for installing monitoring equipment. The existing stress strain monitoring by axially installing the '' type strain sensor 10 and crossing the upper flange 30 and the lower flange 30 of the tower 20 solves the real-time problem that the manual fixed inspection cannot be achieved, simultaneously solves the technical problems that the pressure ring can only monitor one anchor bolt each time, one flange 30 can be connected with hundreds of anchor bolts, the cost of the pressure ring is overhigh and the enough length of the pressure ring is not reserved for installing monitoring equipment. However, the method can only realize that the monitoring module compares the real-time deformation with the preset threshold, if the real-time deformation exceeds the preset threshold, the alarm gives an alarm to realize the safety precaution of the unit, but cannot determine the strain initial value and the alarm threshold, and cannot judge the specific fault type related to the detachment of the flange 30. In view of this, the embodiment of the application provides a data processing method of the tower monitoring system 01 as described below.
Referring to fig. 1, fig. 1 is a schematic diagram of an overall structure of a tower monitoring system 01 according to an embodiment of the present application. The tower monitoring system 01 comprises a strain sensor 10, wherein the tower 20 comprises a main body of the tower 20, a flange 30 and bolts 40, and the flange 30 comprises a top flange 31 and a bottom flange 32; the flange 30 is fixed on the inner wall of the main body of the tower 20 through bolts; the strain sensor 10 connects the top flange 31 and the bottom flange 32 and is used to detect the amount of deformation of the flange 30 under the pre-stress applied by the bolts 40.
Illustratively, the tower monitoring system 01 includes a strain sensor 10, and the tower 20 includes a flange 30 and bolts located inside the tower body, the flange 30 including a top flange 31 and a bottom flange 32. The tower 20 is a tapered structure with a certain gradient, and is used for supporting the head of the wind driven generator, and is generally formed by multiple sections, and each section of tower 20 is connected with one another through a flange 30 surface formed by a flange. The strain sensor 10 may be a strain sensor 10 specially used for measuring pretightening force, each tower section 20 may be provided with a strain sensor 10 (only the general position of the strain sensor 10 is shown in fig. 2), the strain sensor 10 is axially straddled on the top and bottom surfaces of the flange 30 according to the condition that the flange 30 bears load, the strain sensor 10 is connected with the flange 30 by gluing, magnetic force or bolt 40 connection, and the like, and each tower section 20 flange 30 is provided with more than one strain sensor 10, the number of which is uniformly or non-uniformly arranged according to the diameter and the requirement of the tower section 20, and the number of which can be arranged in a customized manner according to the wind direction of the area where the wind turbine is located.
For connection of the foundation and the wind power tower 20, as shown in fig. 2, fig. 2 shows a schematic partial cross-sectional structure of a top flange 31, a bottom flange 32 and bolts 40 of a tower monitoring system 01, wherein the top surface and the bottom surface of the flange 30 are respectively composed of the top flange 31 and the bottom flange 32, and the top flange 31 and the bottom flange 32 in gray parts in the figure are connected through the bolts 40 in middle penetrating parts. Wherein, the top flange 31 and the bottom flange 32 can be a double-ring flange 30 structure in which an inner ring flange close to the inner ring and an outer ring flange close to the outer ring are fixed together by double-ring bolts 40; or may be of conventional single-turn flange 30 construction; or may also be: the top flange 31 has a single-ring flange 30 structure, and the bottom flange 32 has a double-ring flange 30 structure as shown in fig. 2. Because the top flange 31 and the bottom flange 32 are fixed together by screws, bolts or other fixing connection modes to form the whole ring-shaped flange 30, after the prestress at the middle connection position is lost, the inner ring and the outer ring of the flange 30 are possibly separated and tilted. In order to allow for ease of construction and to avoid environmental impact of the strain sensor 10 such as wind and sun exposure, the strain sensor 10 is preferably installed inside the tower 20. When the tower 20 is not loaded, the flange 30 does not deform greatly, namely, has no opening angle, when the tower 20 is loaded, particularly when the bolts 40 are loosened, the opening angle of the flange 30 appears, and the strain sensor 10 as a sensitive element can generate significant changes such as an electric signal or an optical signal, so as to generate a corresponding strain value.
Referring to fig. 3, fig. 3 is a flow chart of a data processing method of a tower monitoring system 01 according to an embodiment of the application. The method is applied to a tower monitoring system 01 for monitoring the tower 20; the data processing method comprises the following steps: step 100, step 120 and step 140.
Step 100: performing simulation calculation on the prestress applied by the bolts 40 under the condition that the tower drum 20 is not loaded, and obtaining an initial strain value of the strain sensor 10;
step 120: under the condition that the tower 20 naturally operates, a strain detection value of the strain sensor 10 is obtained;
step 140: judging whether the tower 20 is in a fault state according to the initial strain value and the strain detection value; wherein the fault condition comprises: the non-disengaged state of the flange 30, the disengaged state of the outer ring of the flange 30, the disengaged state of the inner ring of the flange 30, the severely disengaged state of the outer ring of the flange 30, and the severely disengaged state of the inner ring of the flange 30.
For example, the non-disengaged state of the flange 30 may be that the inner and outer rings of the bottom flange 32 and the top flange 31 have not been disengaged and tilted when the fixing bolts 40 between the bottom flange 32 and the top flange 31 have not been loosened. The outer ring of the flange 30 may be in a state that the inner ring flange 30 is not separated and tilted and the outer ring flange 30 is partially separated and tilted when the fixing bolts 40 between the bottom flange 32 and the top flange 31 are loosened. The inner ring of the flange 30 may be detached when the fixing bolts 40 between the bottom flange 32 and the top flange 31 are loosened, the outer ring flange 30 is not detached and tilted, and the inner ring flange 30 is partially detached and tilted. The serious disconnection state of the outer ring of the flange 30 can be that when the fixing bolts 40 between the bottom flange 32 and the top flange 31 are loosened, the inner ring flange 30 is not disconnected and tilted, the outer ring flange 30 is severely disconnected and tilted, at the moment, the structure of the tower 20 is safe, and operation and maintenance personnel need to check the position of the structure monitoring at once. The serious disconnection state of the inner ring of the flange 30 can be that when the fixing bolts 40 between the bottom flange 32 and the top flange 31 are loosened, the outer ring flange 30 is not disconnected and tilted, the inner ring flange 30 is severely disconnected and tilted, at the moment, the structure of the tower 20 is safe, and operation and maintenance personnel need to check the position of the structure monitoring at once.
In the static state of the fan and under the windless condition, it can be assumed that the stress at the joint of the flange 30 is only affected by the prestressed bolts 40, and no other external load exists, and at this time, the prestressed applied by the bolts 40 at the joint of the flange 30 is subjected to simulation calculation and can be used as the initial strain value of the strain sensor 10; in the fan running state, under the condition of wind or no wind, the stress at the joint of the flange 30 is not only from the weight and the anchor bolt pretightening force, but also from the dynamic load of wind and blade rotation and the normal fluctuation of the equipment, and at the moment, the strain sensor 10 detects and acquires the strain detection value in real time, so that the pretightening force applied by the bolts 40 at the joint of the flange 30 can be measured. Analysis of the initial strain values of the strain sensor 10 and the series of strain detection values detected in real time can determine whether the tower 20 is in a fault condition and in which particular fault condition the flange 30 is in, including one of the above-mentioned flange 30 non-disengaged condition, flange 30 outer ring disengaged condition, flange 30 inner ring disengaged condition, flange 30 outer ring severely disengaged condition, and flange 30 inner ring severely disengaged condition.
By analyzing and processing the data obtained by the strain sensor 10 for measuring the prestress applied by the bolts 40 at the joint of the flange 30, whether the tower 20 is in a fault state or not can be determined, and in which specific fault state, the potential safety risk can be found timely, so that the operation and maintenance personnel can directly identify the fault without additionally spending time to check what fault belongs to, and the check load of the operation and maintenance personnel is reduced.
In one embodiment, step 140 may include: step 150 and step 160.
Step 150: comparing the initial strain value with the strain detection value to determine the fluctuation variation trend of the strain detection value;
step 160: according to the fluctuation trend, it is judged whether the tower 20 is in a fault state.
Illustratively, in the static state of the fan, no other external load exists, and the prestress applied by the bolts 40 at the joint of the flange 30 is calculated at this time and can be used as an initial strain value of the strain sensor 10; in the fan running state, under the condition of wind or no wind, normal load exists, and the prestress applied by the bolts 40 at the joint of the flange 30, which is detected in real time at the moment, can be used as the strain detection value of the strain sensor 10. By comparing a series of strain detection values detected by the strain sensor 10 in real time with the initial strain values, the fluctuation trend of the strain detection values can be determined, and the fault state of the tower 20 can be directly determined according to the fluctuation trend. By analyzing the trend of the change of the strain value data of the strain sensor 10 and judging the fault state of the tower 20, a large amount of calculation resources are saved, the method is convenient and visual, and the data processing efficiency of the strain sensor 10 is improved.
In one embodiment, step 160 may include: step 161.
Step 161: if the fluctuation trend is stable and level or slowly rises, the tower 20 is judged to be in a state that the flange 30 is not disconnected.
Illustratively, the strain gauge is connected to the bottom flange 32 and the top flange 31 of the flange 30, such as bolts 40 (anchor bolts), and the measured value of the strain gauge is the strain value at the connection of the bottom flange 32 and the top flange 31 of the flange 30 of the tower 20, the value is in the range of normal elastic deformation of the flange 30, the initial strain is caused by dead weight and the pretightening force of the anchor bolts, and the normal fluctuation of the tower 20 up and down is caused by dynamic loads of wind and blade rotation and the normal fluctuation of the equipment. As shown in fig. 4, the horizontal axis represents time in days, the vertical axis represents strain detection value in kN, and represents the magnitude of the pretightening force; the solid line is an alarm threshold curve a, and the curve b with the up-and-down fluctuation burr is a strain detection value measured by the strain sensor 10. Over time, the pre-tightening force applied by the bolts 40 is gradually lost, and since the strain value measured by the strain sensor 10 is negative, the measured strain value is continuously stable and leveled or gradually changed and then gradually rises, and at this time, it can be determined that the tower 20 is in a normal flange 30 non-disengaged state.
By analyzing the trend of the change of the strain value data of the strain sensor 10, if the trend of the change is stable and leveled or rises slowly, the fault state of the tower 20 can be determined as the non-disconnection state of the flange 30, so that a large amount of calculation resources are saved, the method is convenient and visual, and the data processing efficiency of the strain sensor 10 is improved.
In one embodiment, step 161 may further include: step 161a and step 161b.
Step 161a: determining an initial prestress of the flange 30 according to the initial strain value;
step 162b: the value after the pre-stress is lost to the pre-set proportion of the initial pre-stress is determined as the flange 30 failure alarm threshold.
For example, the preset proportion can be 10%, 20%, 30% and the like, and the specific value can be set in an alarm mode according to the actual situation or the prestress loss value allowed by the operation and maintenance manual. In the static state of the fan, no other external load exists, the prestress applied by the bolts 40 at the joint of the flange 30 is calculated at this time and can be used as an initial strain value of the strain sensor 10, and the prestress at this time can be used as an initial prestress of the flange 30 in an ideal state. Alternatively, assuming an initial prestress of 591kN and a preset proportion of 20%, an alarm setting is required when the prestress is lost to 472.8kN (e.g., the alarm threshold corresponding to curve a in fig. 4, -472.8kN in the figure), the corresponding strain detection value decays from the original stressed-65.9 mu epsilon to-52.7 mu epsilon, i.e., the alarm is given when the prestress applied to the bolt 40 is lost to some extent, but the flange 30 does not necessarily break loose, and may be in a normal loose state. The alarm threshold value is set according to the calculated initial prestress, so that the degree of prestress loss can be determined more intuitively to alarm, and accidents and economic losses are avoided.
In one embodiment, step 160 may further comprise: step 162 and step 163.
Step 162: if the fluctuation variation trend gradually falls and then gradually rises, the tower 20 is judged to be in the outer ring disconnection state of the flange 30; and/or
Step 163: if the fluctuation trend is gradually rising and then gradually falling, the tower 20 is judged to be in the inner ring disengaging state of the flange 30 or in the local and whole disengaging state of the flange 30.
Illustratively, as shown in fig. 5, two types of fluctuation variation tendencies are shown: v-type (gradually decreasing and then gradually increasing) and a-type (gradually increasing and then gradually decreasing). In the figure, the horizontal axis represents time in seconds, the vertical axis represents a strain detection value in kN, and represents the magnitude of the pretightening force. The fluctuation trend of the data of the strain sensor 10 gradually decreases and then gradually increases, the peak is severely sunken in V shape and swings back to the normal position, and it can be determined that the outer ring of the flange 30 is tilted/detached, that is, the tower 20 is in the outer ring detached state of the flange 30, that is, in the fault state as shown in fig. 6, fig. 6 only shows the cross section portion of the bottom flange 32 of the flange 30, the left side of the dotted line can be regarded as the inner ring of the bottom flange 32 (the bottom surface portion of the inner ring of the flange 30), and the right side of the dotted line can be regarded as the outer ring of the bottom flange 32 (the bottom surface portion of the outer ring of the flange 30). Necessary binding materials such as an upper anchor plate, high-strength grouting material and the like are also arranged between the bottom flange 32 and the top flange 31. The reason why the tower 20 is in the outer ring-disengaged state of the flange 30 is that: the external bolts 40 loosen to cause the external flange 30 to be disconnected and tilted, the strain sensor 10 in the tower 20 is in a severe compression state, strain monitoring data will quickly drop, when the tower 20 swings back to a vertical state or swings right, the disconnected position is closed, the compression area is restored to a normal state, the strain monitoring data jumps back to the normal state, and the fluctuation change trend of the data gradually drops and then gradually rises, so that the V-shaped structure is formed.
Similarly, when the inner ring of the strain sensor 10 is pulled severely when the tower 20 swings, the fluctuation trend is gradually rising and then gradually falling, in a practical scene, the trend may be that the fluctuation trend is rising for 1 or 2 seconds and then falling for 1 or 2 seconds, in the numerical value, the peak is developed into a peak upward A shape, and it can be judged that the inner ring of the flange 30 is tilted/separated or the flange 30 is separated integrally locally, that is, the tower 20 is in the inner ring separation state of the flange 30. The reason is that: the internal bolts 40 loosen to cause the internal flange 30 to be disconnected and tilted, the strain sensor 10 in the tower 20 is in a severe tension state, the strain monitoring data will rise rapidly, when the tower 20 swings back to a vertical state or swings right, the disconnected position is closed, the compression area is restored to a normal state, the strain monitoring data jumps back to the normal state, and the data fluctuation change trend is gradually rising and then gradually falling, so that the A-type tower is formed.
By analyzing the trend of the change of the strain value data of the strain sensor 10, if the trend of the change gradually decreases, gradually increases and gradually decreases, the fault state of the tower 20 can be correspondingly determined to be the outer ring disengaging state of the flange 30 and the inner ring disengaging state of the flange 30 or the local whole disengaging state of the flange 30, so that a large amount of calculation resources are saved, convenience and intuitiveness are realized, and the data processing efficiency of the strain sensor 10 is improved.
In one embodiment, step 163 may further include: step 164 and step 165.
Step 164: if the fluctuation trend is that transverse lines or irregular runout appear after the flange gradually rises when the flange is in a non-disengaging state, judging that the tower 20 is in a severely disengaging state of the flange 30 bottom flange 32 or a locally and integrally disengaging state of the flange 30; and/or
Step 165: if the fluctuation trend is that the flange is gradually lowered when the flange is not in a disconnection state, a transverse line or irregular jump occurs, and the tower 20 is judged to be in a state that the flange 30 is in a serious disconnection with the flange 31 on the top of the flange 31.
For example, when the flange 30 of the outer ring is detached from the flange 30 of the inner ring and the flange 30 of the inner ring is detached from the flange 30 of the outer ring after the detachment of the flange 30 is started to be normal, if the detachment is serious, large deformation may occur, which may cause the measuring member in the strain sensor 10 to be broken. If the data of the strain sensor 10 becomes a transverse line or irregular jump after the violent jump, the strain sensor 10 may be damaged due to excessive deformation and overranging, at this time, the judgment can be performed according to the final normal fluctuation trend of the strain sensor 10, if the fluctuation trend is upward, the phenomenon of tilting/disengaging the inner ring of the flange 30 occurs or the phenomenon of wholly disengaging the flange 30 locally occurs; if the fluctuation trend is downward, the outer ring of the flange 30 is tilted/separated, and at the moment, a major hidden danger occurs to the safety of the structure, and operation and maintenance personnel are required to check the position of the structure monitoring at once.
Regarding the threshold value alarm for 20% of the set initial value, the method is a method for evaluating the prestress in the normal range of the prestress loss under the normal state, and belongs to the prevention of the occurrence of the accident, and the flange 30 should not be disconnected under the state. When a severe jump occurs, the pretightening force of the bolt 40 is usually lost greatly or the tensile stress caused by the bending moment is larger than the pretightening force in the swinging process, and at the moment, the emergency checking is needed as a serious potential safety hazard.
By analyzing the trend of the change of the strain value data of the strain sensor 10, if the change trend is that a transverse line or irregular run-out occurs after the flange is gradually raised in the non-disengaging state or that a transverse line or irregular run-out occurs after the flange is gradually lowered in the non-disengaging state, the fault state of the tower drum 20 can be correspondingly determined to be the serious disengaging state of the flange 30 of the inner ring and the outer ring, a large amount of calculation resources are saved, the method is convenient and visual, and the data processing efficiency of the strain sensor 10 is improved.
In one embodiment, step 100 may include: step 101, step 102 and step 103.
Step 101: applying preset prestress to the bolts 40 in the constructed flange 30 model of the bolts 40 by a cooling method;
step 102: calculating theoretical deformation of the flange 30 in the flange 30 model of the bolt 40 at the installation position of the strain sensor 10 based on preset prestress;
Step 103: the theoretical deformation amount is determined as an initial strain value of the strain sensor 10.
Illustratively, the cooling method may be: the bolts 40 at the junction of the flanges 30 are subjected to a temperature load (reduced in temperature) to shrink the bolts 40 and thereby obtain a prestress. The magnitude of the prestress can be adjusted by adjusting parameters such as linear expansion coefficient, temperature and the like. The position of the axial installation '' type strain sensor 10 crossing the upper flange 30 and the lower flange 30 of the tower 20 can be subjected to structural simulation calculation and analysis, so as to determine the strain initial value and the alarm threshold value after the strain sensor 10 is installed.
Alternatively, the individual bolts 40 and flanges 30 are modeled by finite element simulation models, each model being formulated according to the flange 30 dimensions and the number of bolts 40, the entire flange 30 being equally divided, the bolts 40 of a small block of bolt 40 flange 30 models being subjected to the designed prestressing. The application of the prestressing force can be carried out using a cooling method, taking the simulation software Abaqus as an example, firstly defining the expansion coefficient in the material properties, setting according to the material of the bolts 40 used, then defining a predefined temperature field in the load module, the initial temperature being 0, then lowering the temperature on the basis of the defined initial temperature, the specific temperature being set according to the tensioned prestressing force value. Taking the pre-tightening force 591kN of the M48 bolt 40 as an example, the following parameters can be set, namely the diameter of the bolt 40: 48mm, area of bolt 40: 1809mm2, pretightening force: 591000N, stress: 326.6Mpa, bolt 40 elastic die: 200000Mpa, strain: 0.001633, coefficient of expansion: 0.000012/. Degree.C., applied temperature: 136.1 c, a-136.1 may be applied in a predefined field to the model member representing the bolt 40, achieving the effect of applying 591kN of prestress.
By this method, the stress value of the connection of the two flanges 30 (the installation place of the strain sensor 10) can be calculated in a simulation manner, and under the condition that the fan is in a static state and no wind exists, it can be assumed that the stress of the connection of the flanges 30 is only affected by the pre-stress bolts 40, and no other external load exists, and the stress value can be used as the initial stress value of the strain gauge of the flanges 30. For example, in an initial state, the model calculates an initial pre-stress result of 13.2MPa. Since there is an equation: the prestress/area to which each bolt 40 is fixed = flange 30 stress = strain sensor 10 value × the modulus of elasticity of the material of the flange 30, therefore the corresponding strain sensor 10 initial strain value is: the stress 13.2 Mpa/elastic modulus 200000Mpa is 1000000=65.9 mu epsilon of the micro strain, and the prestress of the bolt 40 and the stress at the joint of the flange 30 and the strain of the strain gauge are all in linear relation. Since the strain sensor 10 is in a compressed state, the strain reading (deformation amount) of the strain sensor 10 is-65.9. Mu.. Epsilon. The strain initial value after the strain sensor 10 is installed can be determined by calculating by a method of establishing a model through finite element simulation and estimating by using a simple formula, and the alarm threshold value can be further calculated according to the strain initial value, so that the calculation accuracy is improved.
Referring to fig. 7, fig. 7 is a schematic diagram showing a data processing apparatus of a tower monitoring system 01 according to an embodiment of the present application, where the method is applied to the tower monitoring system 01 for monitoring a tower 20; the tower monitoring system 01 comprises a strain sensor 10, wherein the tower 20 comprises a main body of the tower 20, a flange 30 and bolts 40, and the flange 30 comprises a top flange 31 and a bottom flange 32; the flange 30 is fixed on the inner wall of the main body of the tower 20 through bolts 40; the strain sensor 10 connects the top flange 31 and the bottom flange 32 of the top flange 31 and is used for detecting the deformation of the flange 30 under the prestress applied by the bolts 40; the apparatus may include: the system comprises an initial value calculating module 210, a strain value detecting module 220 and a fault judging module 230.
The initial value calculation module 210 is configured to calculate the prestress applied by the bolt 40 under the condition that the tower 20 is not loaded, so as to obtain an initial strain value of the strain sensor 10;
the strain detection value module 220 is configured to obtain a strain detection value of the strain sensor 10 under a natural operation condition of the tower 20;
a failure determination module 230, configured to determine whether the tower 20 is in a failure state according to the initial strain value and the strain detection value; wherein the fault condition comprises: the non-disengaged state of the flange 30, the disengaged state of the outer ring of the flange 30, the disengaged state of the inner ring of the flange 30, the severely disengaged state of the outer ring of the flange 30, and the severely disengaged state of the inner ring of the flange 30.
Since the principle of the data processing device of the tower monitoring system 01 in the embodiment of the present application for solving the problem is similar to the foregoing embodiment of the data processing method of the tower monitoring system 01, the implementation of the data processing device of the tower monitoring system 01 in the embodiment of the present application may refer to the description of the foregoing embodiment of the data processing method of the tower monitoring system 01, and the repetition is omitted.
Referring to fig. 8, fig. 8 is a block schematic diagram of an electronic device. The electronic device 300 may include a memory 311, a memory controller 312, a processor 313, a peripheral interface 314, an input output unit 315, a display unit 316. It will be appreciated by those of ordinary skill in the art that the configuration shown in fig. 8 is merely illustrative and is not intended to limit the configuration of the electronic device 300. For example, electronic device 300 may also include more or fewer components than shown in FIG. 8, or have a different configuration than shown in FIG. 8.
The above-mentioned memory 311, memory controller 312, processor 313, peripheral interface 314, input/output unit 315, and display unit 316 are electrically connected directly or indirectly to each other to realize data transmission or interaction. For example, the components may be electrically connected to each other via one or more communication buses or signal lines. The processor 313 is used to execute executable modules stored in the memory.
The Memory 311 may be, but is not limited to, a random access Memory (Random Access Memory, RAM), a Read Only Memory (ROM), a programmable Read Only Memory (Programmable Read-Only Memory, PROM), an erasable Read Only Memory (Erasable Programmable Read-Only Memory, EPROM), an electrically erasable Read Only Memory (Electric Erasable Programmable Read-Only Memory, EEPROM), etc. The memory 311 is configured to store a program, and the processor 313 executes the program after receiving an execution instruction, and a method executed by the electronic device 300 defined by the process disclosed in any embodiment of the present application may be applied to the processor 313 or implemented by the processor 313.
The processor 313 may be an integrated circuit chip having signal processing capabilities. The processor 313 may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU), a network processor (Network Processor, NP), etc.; but also digital signal processors (digital signal processor, DSP for short), application specific integrated circuits (Application Specific Integrated Circuit, ASIC for short), field Programmable Gate Arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The peripheral interface 314 couples various input/output devices to the processor 313 and the memory 311. In some embodiments, the peripheral interface 314, the processor 313, and the memory controller 312 may be implemented in a single chip. In other examples, they may be implemented by separate chips.
The input/output unit 315 is used for providing input data to a user. The input/output unit 315 may be, but is not limited to, a mouse, a keyboard, and the like.
The display unit 316 provides an interactive interface (e.g., a user interface) between the electronic device 300 and a user for reference. In this embodiment, the display unit 316 may be a liquid crystal display or a touch display. The liquid crystal display or the touch display may display a process of executing the program by the processor.
The electronic device 300 in this embodiment may be used to perform each step in each method provided in the embodiment of the present application.
Furthermore, the embodiment of the present application also provides a computer readable storage medium, on which a computer program is stored, which when being executed by a processor, performs the steps in the above-mentioned method embodiments.
The computer program product of the above method according to the embodiments of the present application includes a computer readable storage medium storing a program code, where instructions included in the program code may be used to execute steps in the above method embodiment, and specifically, reference may be made to the above method embodiment, which is not described herein.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. The above-described apparatus embodiments are merely illustrative, for example, the division of the modules is merely a logical function division, and there may be additional divisions in actual implementation, and for example, multiple units or components may be combined or integrated into another apparatus, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some communication interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form. The functional modules in the embodiment of the application can be integrated together to form a single part, or each module can exist alone, or two or more modules can be integrated to form a single part.
It should be noted that the functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM) random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and variations will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (6)
1. The data processing method of the tower monitoring system is characterized by being applied to the tower monitoring system for monitoring the tower; the tower monitoring system comprises a strain sensor, wherein the tower comprises a tower main body, a flange and bolts, and the flange comprises a top flange and a bottom flange; the flange is fixed on the inner wall of the tower cylinder main body through bolts; the strain sensor is connected with the top flange and the bottom flange and is used for detecting deformation of the flange under the prestress applied by the bolts; the method comprises the following steps:
performing simulation calculation on the prestress applied by the bolt under the condition that the tower barrel is not loaded, and obtaining an initial strain value of the strain sensor;
under the condition of natural operation of the tower, obtaining a strain detection value of the strain sensor;
judging whether the tower barrel is in a fault state or not according to the initial strain value and the strain detection value; wherein the fault condition comprises: the flange is in a non-disengaging state, the outer ring of the flange is in a disengaging state, the inner ring of the flange is in a disengaging state, the outer ring of the flange is in a seriously disengaging state, and the inner ring of the flange is in a seriously disengaging state;
Wherein, according to the initial strain value and the strain detection value, judging whether the tower is in a fault state or not includes:
comparing the initial strain value with the strain detection value, and determining the fluctuation variation trend of the strain detection value; if the fluctuation variation trend is stable and leveled or slowly rises, judging that the tower barrel is in a flange non-disengaging state; if the fluctuation variation trend is gradually reduced and then gradually increased, judging that the tower barrel is in an outer ring disengaging state of the flange; and/or if the fluctuation variation trend is gradually rising and then gradually falling, judging that the tower barrel is in the inner ring disconnecting state of the flange or the local and integral disconnecting state of the flange; if the fluctuation variation trend is that transverse lines or irregular jumps appear after the flange gradually rises when the flange is in a non-disconnection state, judging that the tower barrel is in a serious disconnection state of an inner ring of the flange or a local and integral disconnection state of the flange; and/or if the fluctuation variation trend is that the transverse line or irregular jump occurs after the flange gradually descends in the non-disengaging state, judging that the tower barrel is in the serious disengaging state of the outer ring of the flange.
2. The method according to claim 1, wherein after determining that the flange is in the flange non-detached state if the fluctuation variation trend is stable leveling or slowly rising, the method further comprises:
Determining an initial prestress of the flange according to the initial strain value;
and determining the value of the prestress loss after the preset proportion of the initial prestress is reached as a flange fault alarm threshold value.
3. The method of claim 1, wherein calculating the pre-stress applied by the bolts in the absence of a load on the tower to obtain an initial strain value for the strain sensor comprises:
applying preset prestress to the bolts in the constructed bolt flange model by a cooling method;
calculating theoretical deformation of the flange in the bolt flange model at the mounting position of the strain sensor based on the preset prestress;
and determining the theoretical deformation as an initial strain value of the strain sensor.
4. A data processing device of a tower monitoring system, which is characterized in that the device is applied to the tower monitoring system for monitoring a tower; the tower monitoring system comprises a strain sensor, wherein the tower comprises a tower main body, a flange and bolts, and the flange comprises a top flange and a bottom flange; the flange is fixed on the inner wall of the tower cylinder main body through bolts; the strain sensor is connected with the top flange and the bottom flange and is used for detecting deformation of the flange under the prestress applied by the bolts; the device comprises:
The initial value calculation module is used for carrying out simulation calculation on the prestress applied by the bolt under the condition that the tower barrel is not loaded, so as to obtain an initial strain value of the strain sensor;
the strain value detection module is used for acquiring a strain detection value of the strain sensor under the condition of natural operation of the tower;
the fault judging module is used for judging whether the tower barrel is in a fault state or not according to the initial strain value and the strain detection value; wherein the fault condition comprises: the flange is in a non-disengaging state, the outer ring of the flange is in a disengaging state, the inner ring of the flange is in a disengaging state, the outer ring of the flange is in a seriously disengaging state, and the inner ring of the flange is in a seriously disengaging state; the fault judging module is used for: comparing the initial strain value with the strain detection value, and determining the fluctuation variation trend of the strain detection value; if the fluctuation variation trend is stable and leveled or slowly rises, judging that the tower barrel is in a flange non-disengaging state; if the fluctuation variation trend is gradually reduced and then gradually increased, judging that the tower barrel is in an outer ring disengaging state of the flange; and/or if the fluctuation variation trend is gradually rising and then gradually falling, judging that the tower barrel is in the inner ring disconnecting state of the flange or the local and integral disconnecting state of the flange; if the fluctuation variation trend is that transverse lines or irregular jumps appear after the flange gradually rises when the flange is in a non-disconnection state, judging that the tower barrel is in a serious disconnection state of an inner ring of the flange or a local and integral disconnection state of the flange; and/or if the fluctuation variation trend is that the transverse line or irregular jump occurs after the flange gradually descends in the non-disengaging state, judging that the tower barrel is in the serious disengaging state of the outer ring of the flange.
5. An electronic device, comprising: a processor, a memory storing machine-readable instructions executable by the processor, which when executed by the processor perform the steps of the method of any of claims 1 to 3 when the electronic device is run.
6. A computer-readable storage medium, characterized in that it has stored thereon a computer program which, when executed by a processor, performs the steps of the method according to any of claims 1 to 3.
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Denomination of invention: Data processing methods, devices, equipment, and storage media for tower monitoring systems Granted publication date: 20230915 Pledgee: Shijiazhuang Luquan Rural Commercial Bank Co.,Ltd. Pledgor: BEIJING YUNLU TECHNOLOGY CO.,LTD. Registration number: Y2024980015341 |
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