CN113432971A - Method and system for detecting mechanical strength of insulating pull rod - Google Patents
Method and system for detecting mechanical strength of insulating pull rod Download PDFInfo
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- 230000005489 elastic deformation Effects 0.000 claims abstract description 298
- 238000001514 detection method Methods 0.000 claims abstract description 53
- 238000009413 insulation Methods 0.000 claims abstract description 50
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Abstract
The invention provides a method and a system for detecting the mechanical strength of an insulating pull rod, which are characterized in that a mechanical load data set of the insulating pull rod to be detected and an elastic deformation reference curve corresponding to the mechanical load data set are obtained based on product parameters of the insulating pull rod to be detected; determining a data acquisition point of the insulation pull rod to be detected according to the product parameters; applying dynamic mechanical load to the insulating pull rod to be tested; acquiring elastic deformation corresponding to the data acquisition point and stress time corresponding to the insulation pull rod to be tested, and constructing an elastic deformation curve of the insulation pull rod to be tested by utilizing the elastic deformation and the stress time; and comparing the elastic deformation curve with the elastic deformation reference curve, and determining the mechanical strength detection result of the insulating pull rod to be detected according to the comparison result. And applying dynamic mechanical load to the insulating pull rod to be detected to enable the detection process of the insulating pull rod to be detected to be closer to the actual working condition. And comparing the elastic deformation of the insulating pull rod to be detected obtained by collection with an elastic deformation reference curve to obtain a mechanical strength detection result, so that the detection accuracy is improved.
Description
Technical Field
The invention relates to the technical field of data processing, in particular to a method and a system for detecting the mechanical strength of an insulating pull rod.
Background
The insulating tie is a key component in switchgear, generally used to effect the breaking of electrical connections, serving as insulation and operating breaking. Due to the complexity and difficulty of the operation of replacing the switchgear in the electrical network, the insulating tie is required to have a very long service life, i.e. the requirement on the mechanical strength of the insulating tie is high.
At present, the state does not establish standards for the insulating pull rod, and the insulating pull rod is generally subjected to mechanical strength detection by each use unit according to enterprise standards. The more common detection mode is as follows: and applying a mechanical load with a certain time and a certain magnitude to the insulating pull rod, and detecting the change of the insulating pull rod to complete the mechanical strength detection. However, the mechanical load borne by the insulating pull rod in the actual operation process is dynamic, and the tolerance of the insulating pull rod cannot be detected only by applying a fixed mechanical load to the insulating pull rod for a certain time, that is, the existing detection method is inaccurate in detecting the mechanical strength of the insulating pull rod, and the detection accuracy is low.
Disclosure of Invention
In view of this, embodiments of the present invention provide a method and a system for detecting mechanical strength of an insulation pull rod, so as to solve the problems of low detection accuracy and the like in the existing detection method.
In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions:
the embodiment of the invention discloses a method for detecting the mechanical strength of an insulating pull rod in a first aspect, which comprises the following steps:
based on product parameters of an insulation pull rod to be tested, acquiring a mechanical load data set of the insulation pull rod to be tested and an elastic deformation reference curve corresponding to the mechanical load data set, wherein the mechanical load data set comprises a plurality of groups of mechanical loads;
determining a data acquisition point of the insulating pull rod to be detected according to the product parameters;
applying dynamic mechanical load to the insulating pull rod to be tested by utilizing a plurality of groups of mechanical loads in the mechanical load data set;
acquiring elastic deformation corresponding to the data acquisition point, acquiring stress time corresponding to the insulation pull rod to be tested when the elastic deformation is acquired, and constructing an elastic deformation curve of the insulation pull rod to be tested by using the elastic deformation and the stress time;
and comparing the elastic deformation curve with the elastic deformation reference curve, and determining the mechanical strength detection result of the insulation pull rod to be detected according to the comparison result.
Preferably, the comparing the elastic deformation curve with the elastic deformation reference curve, and determining the mechanical strength detection result of the insulating pull rod to be detected according to the comparison result includes:
judging whether the ratio of a first elastic deformation amount in the elastic deformation curve to a second elastic deformation amount in the elastic deformation reference curve is in a preset range or not, wherein the stress time corresponding to the first elastic deformation amount is the same as the stress time corresponding to the second elastic deformation amount;
if each ratio is within the preset range, comparing the contact ratio of the elastic deformation curve and the elastic deformation reference curve;
and if the contact ratio is greater than or equal to the contact ratio threshold value, determining that the mechanical strength of the insulating pull rod to be tested meets the preset requirement.
Preferably, the method further comprises the following steps:
if the ratio of the first elastic deformation to the second elastic deformation is out of a preset range, determining that the mechanical strength of the insulating pull rod to be tested does not meet a preset requirement;
alternatively, the first and second electrodes may be,
and if the contact ratio is smaller than the contact ratio threshold value, determining that the mechanical strength of the insulating pull rod to be tested does not meet the preset requirement.
Preferably, the determining the data acquisition point of the insulating pull rod to be detected according to the product parameter includes:
judging whether the length of the insulating pull rod to be tested is greater than a length threshold value or not according to the product parameters;
if the length is smaller than or equal to the length threshold value, determining the central point of the insulating pull rod to be detected as a data acquisition point;
and if the length is larger than the length threshold, determining N data acquisition points which equally divide the insulating pull rod to be detected into N +1 sections, wherein N is a positive odd number which is not 1.
Preferably, if the insulating pull rod to be tested includes N data acquisition points, acquiring the elastic deformation corresponding to the data acquisition points, and acquiring the stress time corresponding to the insulating pull rod to be tested when acquiring the elastic deformation, constructing the elastic deformation curve of the insulating pull rod to be tested by using the elastic deformation and the stress time, including:
acquiring the elastic deformation and the stress time of each data acquisition point during the application of dynamic mechanical load on the insulating pull rod to be detected;
and constructing an elastic deformation curve corresponding to each data acquisition point based on the elastic deformation amount and the stress time of each data acquisition point.
Preferably, the comparing the elastic deformation curve with the elastic deformation reference curve, and determining the mechanical strength detection result of the insulating pull rod to be detected according to the comparison result includes:
judging whether the ratio of a first elastic deformation amount in the elastic deformation curve corresponding to each data acquisition point to a second elastic deformation amount in the elastic deformation reference curve is within a preset range or not;
if each ratio is within the preset range, comparing the contact ratio of the elastic deformation curve corresponding to each data acquisition point and the elastic deformation reference curve;
and if the contact ratio is greater than or equal to the contact ratio threshold value, determining that the mechanical strength of the insulating pull rod to be tested meets the preset requirement.
The second aspect of the embodiment of the invention discloses a system for detecting the mechanical strength of an insulating pull rod, which comprises:
the device comprises an acquisition unit, a processing unit and a control unit, wherein the acquisition unit is used for acquiring a mechanical load data set of an insulating pull rod to be tested and an elastic deformation reference curve corresponding to the mechanical load data set based on product parameters of the insulating pull rod to be tested, and the mechanical load data set comprises a plurality of groups of mechanical loads;
the determining unit is used for determining a data acquisition point of the insulating pull rod to be detected according to the product parameters;
the load applying unit is used for applying dynamic mechanical load to the insulating pull rod to be tested by utilizing a plurality of groups of mechanical loads in the mechanical load data set;
the processing unit is used for acquiring elastic deformation corresponding to the data acquisition point, acquiring stress time corresponding to the insulation pull rod to be tested when the elastic deformation is acquired, and constructing an elastic deformation curve of the insulation pull rod to be tested by using the elastic deformation and the stress time;
and the comparison unit is used for comparing the elastic deformation curve with the elastic deformation reference curve and determining the mechanical strength detection result of the insulation pull rod to be detected according to the comparison result.
Preferably, the comparison unit includes:
the judging module is used for judging whether the ratio of a first elastic deformation amount in the elastic deformation curve to a second elastic deformation amount in the elastic deformation reference curve is within a preset range or not, and the stress time corresponding to the first elastic deformation amount is the same as the stress time corresponding to the second elastic deformation amount;
the comparison module is used for comparing the contact ratio of the elastic deformation curve and the elastic deformation reference curve if each ratio is within the preset range;
and the determining module is used for determining that the mechanical strength of the insulating pull rod to be tested meets the preset requirement if the contact ratio is greater than or equal to the contact ratio threshold value.
Preferably, the determining module is further configured to: and if the ratio of the first elastic deformation to the second elastic deformation is out of a preset range, or if the contact ratio is smaller than the contact ratio threshold value, determining that the mechanical strength of the insulating pull rod to be tested does not meet the preset requirement.
Preferably, the determining unit is specifically configured to: and judging whether the length of the insulating pull rod to be tested is greater than a length threshold value or not according to the product parameters, if so, determining that the central point of the insulating pull rod to be tested is a data acquisition point, and if so, determining that the insulating pull rod to be tested is equally divided into N +1 sections of N data acquisition points, wherein N is a positive odd number which is not 1.
Based on the method and the system for detecting the mechanical strength of the insulating pull rod provided by the embodiment of the invention, the method comprises the following steps: acquiring a mechanical load data set of the insulation pull rod to be tested and an elastic deformation reference curve corresponding to the mechanical load data set based on product parameters of the insulation pull rod to be tested; determining a data acquisition point of the insulation pull rod to be detected according to the product parameters; applying dynamic mechanical load to the insulating pull rod to be tested by utilizing a plurality of groups of mechanical loads in the mechanical load data set; acquiring elastic deformation corresponding to the data acquisition point, acquiring stress time corresponding to the insulating pull rod to be tested when the elastic deformation is acquired, and constructing an elastic deformation curve of the insulating pull rod to be tested by utilizing the elastic deformation and the stress time; and comparing the elastic deformation curve with the elastic deformation reference curve, and determining the mechanical strength detection result of the insulating pull rod to be detected according to the comparison result. And applying dynamic mechanical load to the insulating pull rod to be detected to enable the detection process of the insulating pull rod to be detected to be closer to the actual working condition. And comparing the elastic deformation of the insulating pull rod to be detected obtained by collection with an elastic deformation reference curve, thereby obtaining a mechanical strength detection result of the insulating pull rod to be detected and improving the detection accuracy.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a flowchart of a method for detecting mechanical strength of an insulated pull rod according to an embodiment of the present invention;
FIG. 2 is a flowchart of determining a mechanical strength detection result according to an embodiment of the present invention;
fig. 3 is a flowchart for obtaining an elastic deformation curve according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of an elastic deformation curve according to an embodiment of the present invention;
fig. 5 is a schematic flow chart of a method for detecting mechanical strength of an insulated pull rod according to an embodiment of the present invention;
fig. 6 is a block diagram of a system for detecting mechanical strength of an insulation pull rod according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In this application, 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 an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
As known from the background art, the mechanical strength of the insulation pull rod is detected by applying a mechanical load to the insulation pull rod for a certain time and a certain magnitude and detecting a change in the insulation pull rod. However, the mechanical load borne by the insulating pull rod in the actual use process is dynamically changed, the existing mechanical strength detection mode cannot detect the tolerance capability of the insulating pull rod, and the detection accuracy is low.
Therefore, the embodiment of the invention provides a method and a system for detecting the mechanical strength of an insulating pull rod, wherein a dynamic mechanical load is applied to the insulating pull rod to be detected, so that the detection process of the insulating pull rod to be detected is closer to the actual working condition, and the acquired elastic deformation of the insulating pull rod to be detected is compared with an elastic deformation reference curve, so that the mechanical strength detection result of the insulating pull rod to be detected is obtained, and the detection accuracy is improved.
Referring to fig. 1, a flowchart of a method for detecting mechanical strength of an insulated pull rod according to an embodiment of the present invention is shown, where the method includes the following steps:
step S101: and acquiring a mechanical load data set of the insulation pull rod to be tested and an elastic deformation reference curve corresponding to the mechanical load data set based on the product parameters of the insulation pull rod to be tested.
It should be noted that, the difference between the product parameters such as the structure and the external dimension of the insulating pull rod used in different voltage classes is large, for example, the insulating pull rod used in a low voltage class is: the material is epoxy resin, and the structure is a pull rod with a solid round bar structure. The insulating pull rod of the high voltage class of more than 110kV is the hollow pull rod of aramid fiber structure, and the length difference of the insulating pull rod used in different voltage classes is also great. Due to the aforementioned differences, the stress characteristics of insulated tension rods under dynamic mechanical loads also differ.
Therefore, according to the product parameters of different insulating pull rods, for example, according to the models and specifications of different insulating pull rods, the mechanical load data sets and the elastic deformation reference curves corresponding to the insulating pull rods of different models and specifications are constructed in advance. The mechanical load data set comprises data in the design and production of the insulating pull rod, simulation calculation data, data measured by a simulation experiment and data actually measured in the detection process. Namely, when the mechanical strength of the insulating pull rod is detected, the analysis can be carried out by utilizing the data in the mechanical load data set.
It is further noted that for a certain type and specification of insulating tie rod, the data contained in the constructed mechanical load data set may not be complete. Therefore, when analyzing by using the data in the mechanical load data set, the priority of use of the data is: the priority of data measured by a simulation experiment and actually measured data in the detection process is higher than that of simulation calculation data, and the priority of the simulation calculation data is higher than that of data in the design and production of the insulating pull rod.
In the process of specifically implementing the step S101, a product parameter of the insulating pull rod to be tested is obtained, and a mechanical load data set and an elastic deformation reference curve of the insulating pull rod to be tested are obtained according to the product parameter, where the mechanical load data set includes multiple groups of mechanical loads.
The reference curve of elastic deformation is constructed from data in the mechanical load data set.
Step S102: and determining a data acquisition point of the insulation pull rod to be detected according to the product parameters.
It should be noted that, in the process of detecting the mechanical strength of the insulating pull rod to be detected, the elastic deformation amount of the insulating pull rod to be detected needs to be collected at the data collection point selected in advance. However, because the lengths of the different types of insulating pull rods are different, the number of the selected data acquisition points of the insulating pull rods with different lengths is also different for better mechanical strength detection.
Therefore, in the process of specifically implementing step S102, the data acquisition point of the insulation pull rod to be measured is determined according to the product parameters, and the specific determination method is as follows: and judging whether the length of the insulating pull rod to be detected is greater than a length threshold value or not. And if the length of the insulating pull rod to be detected is less than or equal to the length threshold value, determining the central point of the insulating pull rod to be detected as a data acquisition point.
And if the length of the insulating pull rod to be tested is greater than the length threshold, determining N data acquisition points which equally divide the insulating pull rod to be tested into N +1 sections, wherein N is a positive odd number which is not 1. For example: assuming that N is equal to 3, after the end hardware fitting of the insulating pull rod to be detected is removed, the 3 data acquisition points are respectively positioned at 25%, 50% and 75% of the length of the insulating pull rod to be detected. Namely, the 3 data acquisition points equally divide the insulating pull rod to be tested into 4 sections.
Step S103: and applying dynamic mechanical load to the insulating pull rod to be tested by utilizing a plurality of groups of mechanical loads in the mechanical load data set.
From the foregoing, it can be seen that the mechanical load to which the insulated pull rod is subjected in practical use is dynamic. Therefore, in the process of implementing step S103, dynamic mechanical loads are applied to the insulating pull rod to be tested by using multiple sets of mechanical loads, so that the process of detecting mechanical strength is closer to the actual working condition.
Step S104: and acquiring elastic deformation corresponding to the data acquisition point, acquiring stress time corresponding to the insulating pull rod to be tested when the elastic deformation is acquired, and constructing an elastic deformation curve of the insulating pull rod to be tested by utilizing the elastic deformation and the stress time.
In the process of implementing step S104, in the process of applying a dynamic mechanical load to the insulating rod to be tested by using multiple groups of mechanical loads, that is, in the process of stressing the insulating rod to be tested, the elastic deformation amount corresponding to the data acquisition point is acquired according to the preset data acquisition period, and the stressing time corresponding to the insulating rod to be tested is acquired when the elastic deformation amount is acquired.
And constructing an elastic deformation curve of the insulating pull rod to be tested by utilizing the elastic deformation and the stress time, namely constructing the elastic deformation curve by taking the elastic deformation and the stress time as coordinate axes and taking the obtained elastic deformation and the corresponding stress time as coordinate values.
Accordingly, the elastic deformation reference curve also has the elastic deformation amount and the stress time as coordinate axes.
For example: and acquiring the elastic deformation A corresponding to the data acquisition point in the 5 th second in the stress process of the insulating pull rod to be tested, wherein the 5 th second is the related stress time. The coordinate value in the elastic deformation curve is (5, a).
Step S105: and comparing the elastic deformation curve with the elastic deformation reference curve, and determining the mechanical strength detection result of the insulating pull rod to be detected according to the comparison result.
In the process of implementing step S105 specifically, when detecting the mechanical strength of the insulating pull rod to be tested, the elastic deformation curve of the insulating pull rod to be tested should be consistent with the elastic deformation reference curve in an ideal state. Therefore, the mechanical strength detection result of the insulating pull rod to be detected can be determined according to the comparison result by comparing the elastic deformation curve with the elastic deformation reference curve, namely whether the mechanical strength of the insulating pull rod to be detected is qualified or not is determined.
In the embodiment of the invention, the mechanical load data set and the elastic deformation reference curve of the insulation pull rod to be tested are obtained according to the product parameters of the insulation pull rod to be tested. And applying dynamic mechanical load to the insulating pull rod to be detected to enable the detection process of the insulating pull rod to be detected to be closer to the actual working condition. And acquiring the elastic deformation corresponding to the predetermined data acquisition point, acquiring the stress time corresponding to the insulation pull rod to be tested when the elastic deformation is acquired, and constructing an elastic deformation curve of the insulation pull rod to be tested. The mechanical strength detection result of the insulating pull rod to be detected is determined by comparing the elastic deformation curve with the elastic deformation reference curve, and the detection accuracy is improved.
In the above-mentioned embodiment of the present invention, referring to fig. 2, the process of determining the mechanical strength detection result of the insulating pull rod to be detected in step S105 in fig. 1 shows a flowchart of determining the mechanical strength detection result provided in the embodiment of the present invention, which includes the following steps:
step S201: and judging whether the ratio of the first elastic deformation amount in the elastic deformation curve to the second elastic deformation amount in the elastic deformation reference curve is in a preset range or not. If not, step S202 is executed, and if yes, step S203 is executed.
In the process of implementing step S201 specifically, as can be seen from the foregoing, the elastic deformation curve and the elastic deformation reference curve both use the elastic deformation and the stress time as coordinate axes, and compare a first elastic deformation in the elastic deformation curve with a second elastic deformation in the elastic deformation reference curve by using a single numerical method, where the stress time corresponding to the first elastic deformation is the same as the stress time corresponding to the second elastic deformation.
The specific comparison mode is as follows: and taking the elastic deformation reference curve as a center, taking the positive and negative M% of the elastic deformation reference curve as an evaluation area, and if any first elastic deformation exceeds the evaluation area, determining that the mechanical strength of the insulating pull rod to be tested is unqualified. And if all the first elastic deformation amounts in the elastic deformation curve do not exceed the evaluation area, comparing the overlap ratio of the elastic deformation curve and the elastic deformation reference curve.
For example: assuming that plus or minus 1% of the elastic deformation reference curve is an evaluation area, the first elastic deformation amount is a, the second elastic deformation amount is b, and the stress time corresponding to the first elastic deformation amount and the second elastic deformation amount is 5. If a is less than 0.99b or a is greater than 1.1b, the mechanical strength of the insulating pull rod to be tested is unqualified.
Step S202: and determining that the mechanical strength of the insulating pull rod to be tested does not meet the preset requirement.
Step S203: and comparing the contact ratio of the elastic deformation curve and the elastic deformation reference curve, judging whether the contact ratio is greater than or equal to a contact ratio threshold value, if so, executing step S204, and if not, executing step S205.
In the process of specifically implementing step S203, when the ratio of all the first elastic deformation amounts to the second elastic deformation amounts is within the preset range, that is, all the first elastic deformation amounts are within the evaluation region, the overlap ratio of the elastic deformation curve and the elastic deformation reference curve is compared. And if the contact ratio is greater than or equal to the contact ratio threshold value, the mechanical strength of the insulating pull rod to be tested is qualified. And if the contact ratio is smaller than the contact ratio threshold value, the mechanical strength of the insulating pull rod to be tested is unqualified.
For example: and comparing the contact ratio of the elastic deformation curve and the elastic deformation reference curve, and if the contact ratio is greater than or equal to 90%, indicating that the mechanical strength of the insulating pull rod to be tested is qualified. And if the contact ratio is less than 90%, the mechanical strength of the insulating pull rod to be tested is unqualified.
Step S204: and determining that the mechanical strength of the insulating pull rod to be tested meets the preset requirement.
Step S205: and determining that the mechanical strength of the insulating pull rod to be tested does not meet the preset requirement.
In the embodiment of the invention, a single numerical evaluation method is adopted to judge whether the ratio of the first elastic deformation amount to the second elastic deformation amount is in a preset range. If all the ratios are within the preset range, the contact ratio of the elastic deformation curve and the elastic deformation reference curve is compared, and if the contact ratio is larger than or equal to the contact ratio threshold value, the mechanical strength of the insulating pull rod to be tested is qualified. Whether the mechanical strength of the insulating pull rod to be detected is qualified or not is judged through the above mode, and the detection accuracy can be effectively improved.
In the process of constructing an elastic deformation curve in step S104 in fig. 1 of the embodiment of the present invention, if the to-be-tested insulating pull rod includes N data acquisition points, referring to fig. 3, a flowchart for acquiring an elastic deformation curve provided in the embodiment of the present invention is shown, which includes the following steps:
step S301: and acquiring the elastic deformation and the stress time of each data acquisition point during the application of the dynamic mechanical load on the insulating pull rod to be measured.
In the process of implementing step S301, since the insulating rod to be tested includes N data acquisition points, the elastic deformation amount and the stress time of each data acquisition point are acquired during the period of applying a dynamic mechanical load to the insulating rod to be tested.
Step S302: and constructing an elastic deformation curve corresponding to each data acquisition point based on the elastic deformation amount and the stress time of each data acquisition point.
From the foregoing, it can be seen that the elastic deformation curve is composed of the elastic deformation amount and the stress time. Therefore, in the process of specifically implementing step S302, an elastic deformation curve corresponding to each data acquisition point is constructed according to the elastic deformation amount and the stress time of each data acquisition point, that is, if there are N data acquisition points, N elastic deformation curves are constructed.
Step S303: and judging whether the ratio of the first elastic deformation amount in the elastic deformation curve corresponding to each data acquisition point to the second elastic deformation amount in the elastic deformation reference curve is within a preset range. If the ratio is out of the preset range, go to step S304. If each ratio is within the predetermined range, step S305 is performed.
It should be noted that each data acquisition point has an elastic deformation reference curve corresponding to itself. In the process of implementing step S303, it is compared whether the ratio of the first elastic deformation amount in the elastic deformation curve corresponding to each data acquisition point to the second elastic deformation amount in the elastic deformation reference curve is within the preset range. And executing the following step S305 only if all the ratios are within the preset range, and if more than one ratio is not within the preset range, determining that the insulating pull rod to be tested is unqualified.
Step S304: and determining that the mechanical strength of the insulating pull rod to be tested does not meet the preset requirement.
Step S305: and comparing the coincidence degree of the elastic deformation curve corresponding to each data acquisition point and the elastic deformation reference curve. Determining whether each contact ratio is greater than or equal to the contact ratio threshold, if so, executing step S306, and if so, executing step S307.
In the process of specifically implementing the step S305, if the contact ratio between the elastic deformation curve corresponding to any one data acquisition point and the elastic deformation reference curve is smaller than the contact ratio threshold, it is determined that the mechanical strength of the insulating pull rod to be tested is not qualified.
For example: if the insulating pull rod to be tested has 3 data acquisition points, each data acquisition point has a corresponding elastic deformation curve and an elastic deformation reference curve. And respectively comparing the elastic deformation curve of each data acquisition point with the elastic deformation reference curve. Only if the elastic deformation curves and the elastic deformation reference curves of the 3 data acquisition points pass through the single numerical method in the embodiment of the invention shown in fig. 2 and the contact ratio of all the elastic deformation curves and the elastic deformation reference curves is greater than or equal to the contact ratio threshold value, the mechanical strength of the insulating pull rod to be tested is determined to be qualified.
Step S306: and determining that the mechanical strength of the insulating pull rod to be tested meets the preset requirement.
Step S307: and determining that the mechanical strength of the insulating pull rod to be tested does not meet the preset requirement.
It should be noted that, for the process of comparing the elastic deformation curve of each data acquisition point with the elastic deformation reference curve in the above steps S303 to S307, reference may be made to the contents shown in each step in fig. 2 in the above embodiment of the present invention, and details are not repeated here.
To better explain the elastic deformation curve referred to above, the elastic deformation curve is illustrated by a schematic diagram of the elastic deformation curve shown in fig. 4, and it should be noted that the illustration in fig. 4 is only for illustration. In fig. 4, the axis of abscissa of the elastic deformation curve is the stress time, and the axis of ordinate is the elastic deformation amount. It should be noted that fig. 4 shows an elastic deformation curve corresponding to a data acquisition point.
In the embodiment of the invention, if the insulating pull rod to be tested comprises N data acquisition points, an elastic deformation curve corresponding to each data acquisition point is constructed. And comparing the elastic deformation curve corresponding to each data acquisition point with the elastic deformation reference curve, and determining the mechanical strength detection result of the insulation pull rod to be detected according to the comparison result, so that the detection accuracy is improved.
To better explain the content shown in each step in fig. 1 to fig. 3, the method for detecting the mechanical strength of the insulated pull rod is illustrated by a flow chart shown in fig. 5, and it should be noted that fig. 5 is only used for illustration. Fig. 5 includes the following steps:
step S501: and selecting a corresponding mechanical load data set according to the voltage grade, the structural form and the overall dimension of the insulating pull rod to be tested.
Step S502: and applying dynamic mechanical load to the insulating pull rod to be tested according to the mechanical load data set.
Step S503: and acquiring the elastic deformation of the data acquisition point and the stress time of the insulating pull rod to be detected, and constructing an elastic deformation curve by using the elastic deformation and the stress time.
Step S504: the elastic deformation curve is compared with an elastic deformation reference curve.
In the process of specifically implementing step S504, the first elastic deformation amount of the elastic deformation curve and the second elastic deformation amount of the elastic deformation reference curve are compared by using a single numerical evaluation method. And if the ratio of any first elastic deformation to any second elastic deformation is not in the preset range, the mechanical strength of the insulating pull rod to be tested is unqualified. If the ratio of all the first elastic deformation amounts to the second elastic deformation amounts is within the preset range, comparing the contact ratio of the elastic deformation curve and the elastic deformation reference curve by using a combined evaluation method, if the contact ratio is greater than or equal to a contact ratio threshold value, the mechanical strength of the insulating pull rod to be tested is qualified, and if the contact ratio is less than the contact ratio threshold value, the mechanical strength of the insulating pull rod to be tested is unqualified.
It should be noted that the execution principle of steps S501 to S504 can refer to the content of each step in fig. 1 to fig. 3 in the above embodiment of the present invention, and details are not repeated here.
In the embodiment of the invention, the mechanical load data set and the elastic deformation reference curve of the insulation pull rod to be tested are obtained according to the product parameters of the insulation pull rod to be tested. And applying dynamic mechanical load to the insulating pull rod to be detected to enable the detection process of the insulating pull rod to be detected to be closer to the actual working condition. And acquiring the elastic deformation corresponding to the predetermined data acquisition point, acquiring the stress time corresponding to the insulation pull rod to be tested when the elastic deformation is acquired, and constructing an elastic deformation curve of the insulation pull rod to be tested. The mechanical strength detection result of the insulating pull rod to be detected is determined by comparing the elastic deformation curve with the elastic deformation reference curve, and the detection accuracy is improved.
Corresponding to the method for detecting the mechanical strength of the insulated pull rod provided by the embodiment of the present invention, referring to fig. 6, the embodiment of the present invention further provides a structural block diagram of a system for detecting the mechanical strength of the insulated pull rod, where the system includes: an acquisition unit 601, a determination unit 602, a load application unit 603, a processing unit 604, and a comparison unit 605;
the obtaining unit 601 is configured to obtain a mechanical load data set of the insulating pull rod to be tested and an elastic deformation reference curve corresponding to the mechanical load data set based on product parameters of the insulating pull rod to be tested, where the mechanical load data set includes multiple groups of mechanical loads.
The determining unit 602 is configured to determine a data acquisition point of the insulation pull rod to be detected according to the product parameter.
In a specific implementation, the determining unit 602 is specifically configured to: and judging whether the length of the insulating pull rod to be tested is greater than a length threshold value or not according to product parameters, if the length of the insulating pull rod to be tested is less than or equal to the length threshold value, determining that the central point of the insulating pull rod to be tested is a data acquisition point, and if the length of the insulating pull rod to be tested is greater than the length threshold value, equally dividing the insulating pull rod to be tested into N +1 sections of N data acquisition points, wherein N is a positive odd number which.
And a load applying unit 603, configured to apply a dynamic mechanical load to the insulating pull rod to be tested by using multiple sets of mechanical loads in the mechanical load data set.
The processing unit 604 is configured to obtain an elastic deformation amount corresponding to the data acquisition point, obtain stress time corresponding to the insulating pull rod to be tested when the elastic deformation amount is obtained, and construct an elastic deformation curve of the insulating pull rod to be tested by using the elastic deformation amount and the stress time.
And the comparison unit 605 is configured to compare the elastic deformation curve with the elastic deformation reference curve, and determine a mechanical strength detection result of the insulation pull rod to be detected according to the comparison result.
In the embodiment of the invention, the mechanical load data set and the elastic deformation reference curve of the insulation pull rod to be tested are obtained according to the product parameters of the insulation pull rod to be tested. And applying dynamic mechanical load to the insulating pull rod to be detected to enable the detection process of the insulating pull rod to be detected to be closer to the actual working condition. And acquiring the elastic deformation corresponding to the predetermined data acquisition point, acquiring the stress time corresponding to the insulation pull rod to be tested when the elastic deformation is acquired, and constructing an elastic deformation curve of the insulation pull rod to be tested. The mechanical strength detection result of the insulating pull rod to be detected is determined by comparing the elastic deformation curve with the elastic deformation reference curve, and the detection accuracy is improved.
Preferably, in conjunction with the content shown in fig. 6, the comparing unit 605 includes a judging module, a comparing module and a determining module, wherein the execution principle of each module is as follows:
and the judging module is used for judging whether the ratio of the first elastic deformation amount in the elastic deformation curve to the second elastic deformation amount in the elastic deformation reference curve is within a preset range or not, and the stress time corresponding to the first elastic deformation amount is the same as the stress time corresponding to the second elastic deformation amount.
And the comparison module is used for comparing the coincidence degree of the elastic deformation curve and the elastic deformation reference curve if each ratio is within a preset range.
And the determining module is used for determining that the mechanical strength of the insulating pull rod to be tested meets the preset requirement if the contact ratio is greater than or equal to the contact ratio threshold value.
Preferably, the determining module is further configured to: and if the ratio of the first elastic deformation to the second elastic deformation is out of the preset range, or if the contact ratio is smaller than the contact ratio threshold value, determining that the mechanical strength of the insulating pull rod to be tested does not meet the preset requirement.
Preferably, with reference to the content shown in fig. 6, in a specific implementation, if the to-be-tested insulated pull rod includes N data acquisition points, the processing unit 604 is specifically configured to: and during the period of applying dynamic mechanical load to the insulating pull rod to be tested, acquiring the elastic deformation and the stress time of each data acquisition point, and constructing an elastic deformation curve corresponding to each data acquisition point based on the elastic deformation and the stress time of each data acquisition point.
Accordingly, the method can be used for solving the problems that,
and the judging module is used for judging whether the ratio of the first elastic deformation amount in the elastic deformation curve corresponding to each data acquisition point to the second elastic deformation amount in the elastic deformation reference curve is within a preset range.
And the comparison module is used for comparing the coincidence degree of the elastic deformation curve corresponding to each data acquisition point and the elastic deformation reference curve if each ratio is within the preset range.
And the determining module is used for determining that the mechanical strength of the insulating pull rod to be tested meets the preset requirement if each contact ratio is greater than or equal to the contact ratio threshold value.
In summary, the embodiments of the present invention provide a method and a system for detecting mechanical strength of an insulating pull rod, where the method includes: acquiring a mechanical load data set of the insulation pull rod to be tested and an elastic deformation reference curve corresponding to the mechanical load data set based on product parameters of the insulation pull rod to be tested; determining a data acquisition point of the insulation pull rod to be detected according to the product parameters; applying dynamic mechanical load to the insulating pull rod to be tested by utilizing a plurality of groups of mechanical loads in the mechanical load data set; acquiring elastic deformation corresponding to the data acquisition point, acquiring stress time corresponding to the insulating pull rod to be tested when the elastic deformation is acquired, and constructing an elastic deformation curve of the insulating pull rod to be tested by utilizing the elastic deformation and the stress time; and comparing the elastic deformation curve with the elastic deformation reference curve, and determining the mechanical strength detection result of the insulating pull rod to be detected according to the comparison result. And applying dynamic mechanical load to the insulating pull rod to be detected to enable the detection process of the insulating pull rod to be detected to be closer to the actual working condition. And comparing the elastic deformation of the insulating pull rod to be detected obtained by collection with an elastic deformation reference curve, thereby obtaining a mechanical strength detection result of the insulating pull rod to be detected and improving the detection accuracy.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, the system or system embodiments are substantially similar to the method embodiments and therefore are described in a relatively simple manner, and reference may be made to some of the descriptions of the method embodiments for related points. The above-described system and system embodiments are only illustrative, wherein the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method for detecting the mechanical strength of an insulated pull rod is characterized by comprising the following steps:
based on product parameters of an insulation pull rod to be tested, acquiring a mechanical load data set of the insulation pull rod to be tested and an elastic deformation reference curve corresponding to the mechanical load data set, wherein the mechanical load data set comprises a plurality of groups of mechanical loads;
determining a data acquisition point of the insulating pull rod to be detected according to the product parameters;
applying dynamic mechanical load to the insulating pull rod to be tested by utilizing a plurality of groups of mechanical loads in the mechanical load data set;
acquiring elastic deformation corresponding to the data acquisition point, acquiring stress time corresponding to the insulation pull rod to be tested when the elastic deformation is acquired, and constructing an elastic deformation curve of the insulation pull rod to be tested by using the elastic deformation and the stress time;
and comparing the elastic deformation curve with the elastic deformation reference curve, and determining the mechanical strength detection result of the insulation pull rod to be detected according to the comparison result.
2. The method according to claim 1, wherein the comparing the elastic deformation curve with the elastic deformation reference curve and determining the mechanical strength detection result of the insulating pull rod to be tested according to the comparison result comprises:
judging whether the ratio of a first elastic deformation amount in the elastic deformation curve to a second elastic deformation amount in the elastic deformation reference curve is in a preset range or not, wherein the stress time corresponding to the first elastic deformation amount is the same as the stress time corresponding to the second elastic deformation amount;
if each ratio is within the preset range, comparing the contact ratio of the elastic deformation curve and the elastic deformation reference curve;
and if the contact ratio is greater than or equal to the contact ratio threshold value, determining that the mechanical strength of the insulating pull rod to be tested meets the preset requirement.
3. The method of claim 2, further comprising:
if the ratio of the first elastic deformation to the second elastic deformation is out of a preset range, determining that the mechanical strength of the insulating pull rod to be tested does not meet a preset requirement;
alternatively, the first and second electrodes may be,
and if the contact ratio is smaller than the contact ratio threshold value, determining that the mechanical strength of the insulating pull rod to be tested does not meet the preset requirement.
4. The method of claim 1, wherein determining a data collection point for the insulated tension rod under test from the product parameters comprises:
judging whether the length of the insulating pull rod to be tested is greater than a length threshold value or not according to the product parameters;
if the length is smaller than or equal to the length threshold value, determining the central point of the insulating pull rod to be detected as a data acquisition point;
and if the length is larger than the length threshold, determining N data acquisition points which equally divide the insulating pull rod to be detected into N +1 sections, wherein N is a positive odd number which is not 1.
5. The method according to claims 1 to 4, wherein if the insulating pull rod to be tested includes N data acquisition points, the obtaining of the elastic deformation corresponding to the data acquisition points and the obtaining of the stress time corresponding to the insulating pull rod to be tested when the elastic deformation is obtained, and the constructing of the elastic deformation curve of the insulating pull rod to be tested using the elastic deformation and the stress time comprises:
acquiring the elastic deformation and the stress time of each data acquisition point during the application of dynamic mechanical load on the insulating pull rod to be detected;
and constructing an elastic deformation curve corresponding to each data acquisition point based on the elastic deformation amount and the stress time of each data acquisition point.
6. The method according to claim 5, wherein the comparing the elastic deformation curve with the elastic deformation reference curve and determining the mechanical strength detection result of the insulating pull rod to be tested according to the comparison result comprises:
judging whether the ratio of a first elastic deformation amount in the elastic deformation curve corresponding to each data acquisition point to a second elastic deformation amount in the elastic deformation reference curve is within a preset range or not;
if each ratio is within the preset range, comparing the contact ratio of the elastic deformation curve corresponding to each data acquisition point and the elastic deformation reference curve;
and if the contact ratio is greater than or equal to the contact ratio threshold value, determining that the mechanical strength of the insulating pull rod to be tested meets the preset requirement.
7. A system for detecting the mechanical strength of an insulated tie rod, the system comprising:
the device comprises an acquisition unit, a processing unit and a control unit, wherein the acquisition unit is used for acquiring a mechanical load data set of an insulating pull rod to be tested and an elastic deformation reference curve corresponding to the mechanical load data set based on product parameters of the insulating pull rod to be tested, and the mechanical load data set comprises a plurality of groups of mechanical loads;
the determining unit is used for determining a data acquisition point of the insulating pull rod to be detected according to the product parameters;
the load applying unit is used for applying dynamic mechanical load to the insulating pull rod to be tested by utilizing a plurality of groups of mechanical loads in the mechanical load data set;
the processing unit is used for acquiring elastic deformation corresponding to the data acquisition point, acquiring stress time corresponding to the insulation pull rod to be tested when the elastic deformation is acquired, and constructing an elastic deformation curve of the insulation pull rod to be tested by using the elastic deformation and the stress time;
and the comparison unit is used for comparing the elastic deformation curve with the elastic deformation reference curve and determining the mechanical strength detection result of the insulation pull rod to be detected according to the comparison result.
8. The system of claim 7, wherein the comparison unit comprises:
the judging module is used for judging whether the ratio of a first elastic deformation amount in the elastic deformation curve to a second elastic deformation amount in the elastic deformation reference curve is within a preset range or not, and the stress time corresponding to the first elastic deformation amount is the same as the stress time corresponding to the second elastic deformation amount;
the comparison module is used for comparing the contact ratio of the elastic deformation curve and the elastic deformation reference curve if each ratio is within the preset range;
and the determining module is used for determining that the mechanical strength of the insulating pull rod to be tested meets the preset requirement if the contact ratio is greater than or equal to the contact ratio threshold value.
9. The system of claim 8, wherein the determination module is further configured to: and if the ratio of the first elastic deformation to the second elastic deformation is out of a preset range, or if the contact ratio is smaller than the contact ratio threshold value, determining that the mechanical strength of the insulating pull rod to be tested does not meet the preset requirement.
10. The system according to claim 7, wherein the determining unit is specifically configured to: and judging whether the length of the insulating pull rod to be tested is greater than a length threshold value or not according to the product parameters, if so, determining that the central point of the insulating pull rod to be tested is a data acquisition point, and if so, determining that the insulating pull rod to be tested is equally divided into N +1 sections of N data acquisition points, wherein N is a positive odd number which is not 1.
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