CN115752309A - Ultrasonic detection method and system for strain clamp connector and electronic equipment - Google Patents
Ultrasonic detection method and system for strain clamp connector and electronic equipment Download PDFInfo
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- CN115752309A CN115752309A CN202211470016.XA CN202211470016A CN115752309A CN 115752309 A CN115752309 A CN 115752309A CN 202211470016 A CN202211470016 A CN 202211470016A CN 115752309 A CN115752309 A CN 115752309A
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Abstract
The application discloses strain clamp connector ultrasonic detection method and system and electronic equipment, wherein the method comprises the following steps: s1, acquiring strain clamp wall thickness data through ultrasonic data of a phased array detector; s2, removing a pressure interval which enables the strain clamp to be unqualified in edge distance after being crimped; s3, arranging the strain clamp in a qualified pressure interval, and carrying out ultrasonic detection on the strain clamp to obtain a wall thickness interval; and S4, judging whether the crimping of the strain clamp is qualified or not according to the collected strain clamp wall thickness data and the obtained wall thickness interval. In the technical scheme, if the ultrasonic phased array equipment detects that the wall thickness average value obtained by detection is larger than the wall thickness interval obtained by arrangement under the condition that the pressure is qualified based on the steps, the judgment can be made as qualified. Compared with the prior art, the technical scheme provided by the invention has higher detection result accuracy and higher detection efficiency.
Description
Technical Field
The application relates to the technical field of ultrasonic detection, more specifically relates to a strain clamp connector ultrasonic detection method, and in addition, the application also relates to a strain clamp connector ultrasonic detection system and an electronic device.
Background
The strain clamp crimping connector is a crimping type electric power fitting used for an overhead transmission line and is widely used in a power grid system, a steel core and an aluminum stranded wire are crimped together firstly by the strain clamp crimping connector through a crimping machine, then the steel core aluminum stranded wire and an aluminum sleeve are crimped together, in the process, the crimping process control of the strain clamp crimping connector finally determines the crimping quality, and the reason that the accident is caused by the crimping quality problem of the strain clamp and the splicing sleeve is mostly caused by the fact that a ground wire does not penetrate in place in a crimping sleeve or the crimping position does not accord with the crimping quality problem of related regulations and the like.
The tension clamp connector with quality problems is used on a power transmission line, potential safety hazards exist in the line, the traditional detection and analysis means of the tension clamp can only judge the crimping quality of the tension clamp according to data obtained by measuring the outer diameter, certain limitations exist, and the accuracy of the tension clamp connector quality detection method in the prior art needs to be improved.
Therefore, how to provide an ultrasonic detection method for a strain clamp joint, which has high accuracy of detection results and high detection efficiency, has become a technical problem to be solved by those skilled in the art.
Disclosure of Invention
In order to solve the technical problem, the application provides a strain clamp connector ultrasonic detection method and system, and an electronic device, which have high detection result accuracy and high detection efficiency.
The technical scheme provided by the application is as follows:
the application provides a strain clamp connector ultrasonic detection method, which comprises the following steps: s1, acquiring strain clamp wall thickness data through ultrasonic data of a phased array detector; s2, removing a pressure interval which enables the strain clamp to be unqualified in edge distance after being crimped; s3, arranging the strain clamp in a qualified pressure interval, and carrying out ultrasonic detection on the strain clamp to obtain a wall thickness interval; and S4, judging whether the crimping of the strain clamp is qualified or not according to the measured wall thickness data of the strain clamp and the obtained wall thickness interval.
Further, in a preferred mode of the present invention, the method further includes the steps of: and setting a fuzzy interval of 0.5-1 mm, and if the wall thickness of the strain clamp is detected to be in the fuzzy interval, re-detecting to judge whether the crimping of the strain clamp is qualified.
Further, in a preferred mode of the present invention, the step of "acquiring the strain clamp wall thickness data by the phased array detector ultrasonic data" includes: and detecting the pressure welding position of the steel core and the steel anchor by using ultrasonic phased array equipment to obtain the wall thickness of the position.
Further, in a preferred mode of the present invention, the step of "acquiring the strain clamp wall thickness data by the phased array detector ultrasonic data" includes: and detecting the pressure welding position of the notch and the aluminum sleeve by using ultrasonic phased array equipment to obtain the wall thickness of the position.
Further, in a preferred mode of the present invention, the step of "acquiring the strain clamp wall thickness data by using the phased array detector ultrasonic data" includes: and detecting the compression joint position of the aluminum stranded wire and the aluminum sleeve by using ultrasonic phased array equipment, and measuring the wall thickness of the position.
Further, in a preferred mode of the invention, the detection probe is L55-20L 64-0.4X 5, the wedge block is SL55-N0L15mm, and the CRS scanner head.
Further, in a preferred mode of the present invention, after the steel core is crimped to the steel anchor position, the steel core is immediately detected by using a phased array device, the shape of the crimped section is a regular hexagon, and data acquisition is performed on all six surfaces, so that the probe uniformly sweeps through all crimped positions.
Further, in a preferred mode of the present invention, a phased array ultrasonic transducer is used to concentrate the acoustic energy at the detection point by emitting a focused acoustic beam, thereby achieving high detection resolution.
In addition, this application still provides a strain clamp connects ultrasonic testing system for supplementary the execution strain clamp connects ultrasonic testing method as above, includes: a monitor, a scanner and a probe; the system comprises a hardware system, a software system and a power supply control network, wherein the hardware system and the software system are arranged in a monitor; the hardware system comprises a phased array receiving and sending module and a conventional receiving and sending module, the phased array receiving and sending module comprises an FPGA and a CPU, a 256MDDR3 is externally hung on the FPGA, and a memory bank is externally hung on the CPU; the software system comprises an open-source linux inner core, a GTK interface and a GCC; the power supply control network comprises an FPG control module and a single chip microcomputer control module; the FPG control module comprises TOFD high-low voltage control and PA high-low voltage control, and the single chip microcomputer control module controls the power switch, the core board power control and the peripheral device power supply control.
In addition, the present application also provides an electronic device comprising at least one processor and a memory; the memory stores computer-executable instructions; the at least one processor executes computer-executable instructions stored in the memory to cause the at least one processor to perform the strain clamp connector ultrasonic testing method as described above.
The invention provides an ultrasonic detection method and system for a strain clamp connector and electronic equipment, wherein the ultrasonic detection method for the strain clamp connector comprises the following steps: s1, acquiring strain clamp wall thickness data through ultrasonic data of a phased array detector; s2, removing a pressure interval which enables the strain clamp to be unqualified in edge distance after being crimped; s3, arranging the strain clamp in a qualified pressure interval, and carrying out ultrasonic detection on the strain clamp to obtain a wall thickness interval; and S4, judging whether the crimping of the strain clamp is qualified or not according to the collected strain clamp wall thickness data and the obtained wall thickness interval. In this technical scheme, whether qualified feasibility of ultrasonic phased array equipment detection strain clamp crimping has been verified each other with strain clamp ultrasonic experiment result in combination finite element analysis conclusion, has arranged the relevant data of ultrasonic experiment, and to the margin after combining the strain clamp crimping, whether qualified decision mode of strain clamp is judged in ultrasonic detection has been proposed: removing a pressure interval which enables the strain clamp to be unqualified in edge distance after being crimped; arranging the strain clamp in a qualified pressure interval, and performing ultrasonic detection on the strain clamp to obtain a wall thickness interval; and if the average value of the wall thickness obtained by detection of the ultrasonic phased array equipment under the condition that the pressure is qualified is larger than the wall thickness interval obtained by arrangement, judging that the pressure is qualified. Compared with the prior art, the technical scheme provided by the invention has higher detection result accuracy and higher detection efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present application 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 some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic step diagram of an ultrasonic testing method for a strain clamp connector according to an embodiment of the present invention;
fig. 2 is a schematic view of an ultrasonic testing system for a strain clamp connector according to an embodiment of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all 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 application.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or be indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "first," "second," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "plurality" or "a plurality" means two or more unless specifically limited otherwise.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the practical limit conditions of the present application, so that the modifications of the structures, the changes of the ratio relationships, or the adjustment of the sizes, do not have the technical essence, and the modifications, the changes of the ratio relationships, or the adjustment of the sizes, are all within the scope of the technical contents disclosed in the present application without affecting the efficacy and the achievable purpose of the present application.
As shown in fig. 1 and fig. 2, the present application provides a strain clamp connector ultrasonic detection method and system, and an electronic device, wherein the strain clamp connector ultrasonic detection method includes the following steps: s1, acquiring strain clamp wall thickness data through ultrasonic data of a phased array detector; s2, removing a pressure interval which enables the strain clamp to be unqualified in the edge distance after compression joint; s3, arranging the strain clamp in a qualified pressure interval, and carrying out ultrasonic detection on the strain clamp to obtain a wall thickness interval; and S4, judging whether the crimping of the strain clamp is qualified or not according to the measured wall thickness data of the strain clamp and the obtained wall thickness interval. In this technical scheme, whether qualified feasibility of ultrasonic phased array equipment detection strain clamp crimping has been verified each other with strain clamp ultrasonic experiment result in combination finite element analysis conclusion, has arranged the relevant data of ultrasonic experiment, and to the margin after combining the strain clamp crimping, whether qualified decision mode of strain clamp is judged in ultrasonic detection has been proposed: removing a pressure interval which enables the strain clamp to be unqualified in the edge distance after compression joint; arranging the strain clamp in a qualified pressure interval, and ultrasonically detecting the strain clamp to obtain a wall thickness interval; and if the average value of the wall thickness detected by the ultrasonic phased array equipment under the condition that the pressure is qualified is larger than the range of the wall thickness obtained by sorting, judging that the pressure is qualified. Compared with the prior art, the technical scheme provided by the invention has higher detection result accuracy and higher detection efficiency.
Specifically, in an embodiment of the present invention, the method further includes the steps of: and setting a fuzzy interval of 0.5-1 mm, if the wall thickness of the strain clamp is detected to be in the fuzzy interval, re-detecting to judge whether the crimping of the strain clamp is qualified, and if the wall thickness of the strain clamp is detected to be in the fuzzy interval, re-detecting to judge due to factors such as field acoustic environment interference, material casting error and the like, wherein the fuzzy interval of 0.5-1 mm is set in the embodiment of the invention, and if the wall thickness is detected to be in the fuzzy interval, re-detecting to judge is favorable for improving the accuracy of the detection result.
Specifically, in the embodiment of the present invention, the step "acquiring the strain clamp wall thickness data by using the phased array detector ultrasonic data" includes: and detecting the pressure welding position of the steel core and the steel anchor by using ultrasonic phased array equipment to obtain the wall thickness of the position.
Specifically, in the embodiment of the present invention, the step "acquiring the strain clamp wall thickness data by using the phased array detector ultrasonic data" includes: and detecting the pressure welding position of the notch and the aluminum sleeve by using ultrasonic phased array equipment to obtain the wall thickness of the position.
Specifically, in the embodiment of the present invention, the step "acquiring the strain clamp wall thickness data by using the phased array detector ultrasonic data" includes: and detecting the compression joint position of the aluminum stranded wire and the aluminum sleeve by using ultrasonic phased array equipment, and measuring the wall thickness of the position.
Specifically, in an embodiment of the present invention, a L55-20L64-0.4 x 5 detection probe, a SL55-N0L15mm wedge, a CRS scanner head.
Specifically, in the embodiment of the invention, phased array equipment is used for detecting the steel core and the steel anchor position immediately after the crimping is finished, the shape of the crimping section is a regular hexagon, and data acquisition is carried out on all six surfaces so as to realize that the probe uniformly sweeps all crimped positions.
Specifically, in an embodiment of the present invention, a phased array ultrasonic transducer is used to achieve high detection resolution by emitting a focused acoustic beam to concentrate the acoustic energy at the detection point.
The ultrasonic detection method for the strain clamp connector disclosed by the invention is specifically explained by combining the specific embodiment as follows:
in the embodiment of the invention, a phascan phased array detector is adopted for ultrasonic data acquisition, a L55-20L64-0.4 x 5 detection probe, a SL55-N0L15mm wedge block and a CRS scanner head are adopted, when ultrasonic waves are transmitted to contact surfaces of two parts and a cavity between strands, the ultrasonic waves can rebound to the probe, and finally the obtained ultrasonic spectrum is obtained. It should be noted that S in the ultrasound atlas represents a sectional view of the current probe position; c represents a top view; and B represents a B scanning view, namely a side projection display mode of the workpiece, wherein the abscissa of the image represents the distance (scanning axis) moved along the scanning line, and the ordinate of the image represents the depth (ultrasonic axis). Ultrasound data naming rules: SY-240-844-1-3000.
In the embodiment of the invention, when the positions of the steel anchor and the steel core are detected by using the phased array equipment, the ultrasonic signal of the phased array detection equipment cannot penetrate through the air, so that the detection is required to be carried out immediately after the steel anchor and the steel core are crimped. The ultrasound pattern shows a red diagonal line as a result of the twisting of the steel core strands. The length of the red oblique line is the area where the steel core is attached to the steel anchor and actually pressed. And as long as the actual crimping area is equal to the theoretical crimping length of the strain clamp, the steel core is inserted in place. The compression joint lengths of the tension-resistant wire clamp steel anchors of different models are different from the theoretical compression joint length of the steel core, wherein the compression joint area of the NY-240/40 steel anchor and the steel core is 110mm, the compression joint area of the NY-400/35 steel anchor and the steel core is 100mm, and the compression joint area of the NY-630/45 steel anchor and the steel core is 110mm.
According to the experiment, when the pressure bonding was carried out with a standard pressure of 80MPa, the average wall thickness of NY-400/35 was detected to be 4.19mm. And averagely dividing the whole detection section into a plurality of areas, reading and recording, and calculating the average value which is the wall thickness of the steel core. The average wall thickness of NY-240/40 was 4.06mm and that of NY-630/45 was 4.13mm.
In the embodiment of the invention, the first layer in the ultrasonic detection map of the compression joint position of the steel anchor step and the aluminum sleeve is the position of the groove top, the lower layer is the position of the groove bottom, and the depth and the number of the grooves are judged by measuring the depth of the groove top and the depth of the groove bottom; taking model NY-240/40 strain clamp as an example, when the phased array ultrasonic detection technology is used, if the imaging result of the bottom of the groove can show that the strain clamp is uneven. The depth of the groove bottom detected at one position is 1.8mm, the depth of the groove bottom detected at the other position is less than 1.8mm, and the right end of the groove bottom is not completely contacted by comparing the actual sizes of the grooves, so that the groove bottom is judged to be unqualified.
In addition, in the embodiment of the invention, the compression joint position of the steel core and the steel anchor is detected by using ultrasonic phased array equipment, the imaging result of a phased array imaging graph of the ultrasonic phased array equipment shows the size of a cavity, the wall thickness of the cavity can be measured, the average depth of 5 NY-240/40 strain clamps compressed by a standard compression joint process outside the steel anchor by using the ultrasonic phased array equipment is recorded, and the average depth value is calculated to be 4.06mm; the ultrasonic phased array equipment is used for detecting the crimping position of the notch and the aluminum sleeve, and two steps can be clearly seen in the phased array imaging graph. The imaging image shows the groove bottom clearly, and the depth of the groove bottom can be directly read out. And recording the average thickness of the 5 NY-240/40 notches of the standard crimping process and the crimping position of the aluminum sleeve outside the aluminum sleeve detected by using ultrasonic phased array equipment, and obtaining the average depth value of 6.92mm.
The compression joint position of the aluminum stranded wire and the aluminum sleeve is detected by using ultrasonic phased array equipment, a plurality of cavities can be obviously seen from the imaging result of a phased array imaging graph, and the wall thickness of the position can be measured. And 5 NY-240/40 aluminum stranded wires in the standard crimping process and the average thickness of the aluminum sleeve crimped outside the aluminum sleeve detected by using ultrasonic phased array equipment are recorded, and the average depth value is obtained to be 6.51mm.
In conclusion, according to simulation data, the depth of the cavity below the measured surface is 4.48mm, and the average depth of experimental data is 4.06mm at the crimping position of the steel core and the steel anchor; at the notch crimping position, according to simulation data, the depth of the groove bottom is 7.56mm, and the experimental data is 6.92mm; at the crimping position of the aluminum sleeve and the aluminum stranded wire, the depth of the cavity below the measured surface is 6.65mm according to simulation data, and the depth value is 6.51mm according to experimental data. The simulation data is very close to the experimental data, and the reliability of the ultrasonic equipment for judging the thickness of the strain clamp is proved.
In addition, this application still provides a strain clamp connects ultrasonic testing system for supplementary execution as above strain clamp connects ultrasonic testing method, includes: a monitor, a scanner and a probe; the system comprises a hardware system, a software system and a power supply control network, wherein the hardware system and the software system are arranged in a monitor; the hardware system comprises a phased array receiving and sending module and a conventional receiving and sending module, the phased array receiving and sending module comprises an FPGA and a CPU, a 256MDDR3 plug-in piece is connected to the FPGA, and a memory chip is connected to the CPU plug-in piece; the software system comprises an open source linux inner core, a GTK interface and a GCC; the power supply control network comprises an FPG control module and a single chip microcomputer control module; the FPG control module comprises TOFD high-low voltage control and PA high-low voltage control, and the single chip microcomputer control module controls the power switch, the core board power control and the peripheral device power supply control.
In addition, the present application also provides an electronic device comprising at least one processor and a memory; the memory stores computer-executable instructions; the at least one processor executes computer-executable instructions stored in the memory to cause the at least one processor to perform the strain clamp connector ultrasonic testing method as described above.
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. An ultrasonic detection method for a strain clamp connector is characterized by comprising the following steps:
s1, acquiring strain clamp wall thickness data through ultrasonic data of a phased array detector;
s2, removing a pressure interval which enables the strain clamp to be unqualified in edge distance after being crimped;
s3, arranging the strain clamp in a qualified pressure interval, and carrying out ultrasonic detection on the strain clamp to obtain a wall thickness interval;
and S4, judging whether the crimping of the strain clamp is qualified or not according to the collected tension clamp wall thickness data and the obtained wall thickness interval.
2. The ultrasonic testing method of the strain clamp connector of claim 1, further comprising the steps of: and setting a fuzzy interval of 0.5-1 mm, and if the wall thickness of the strain clamp is detected to be in the fuzzy interval, re-detecting to judge whether the crimping of the strain clamp is qualified.
3. The ultrasonic testing method of the strain clamp connector according to claim 2, wherein the step of collecting the strain clamp wall thickness data through the phased array tester ultrasonic data comprises: and detecting the pressure welding position of the steel core and the steel anchor by using ultrasonic phased array equipment to obtain the wall thickness data of the position.
4. The ultrasonic testing method of the strain clamp connector according to claim 3, wherein the step of collecting the strain clamp wall thickness data through the phased array tester ultrasonic data comprises: and detecting the crimping position of the notch and the aluminum sleeve by using ultrasonic phased array equipment to obtain the wall thickness data of the position.
5. The ultrasonic testing method of the strain clamp connector according to claim 4, wherein the step of collecting the strain clamp wall thickness data through the phased array tester ultrasonic data comprises: and detecting the compression joint position of the aluminum stranded wire and the aluminum sleeve by using ultrasonic phased array equipment, and measuring the wall thickness data of the position.
6. The ultrasonic testing method for the strain clamp joint according to any one of claims 1 to 5, wherein a phascan phased array tester is specifically adopted for ultrasonic data acquisition; L55-20L64-0.4 x 5 detection probe, SL55-N0L15mm wedge, CRS scanner head.
7. The ultrasonic detection method of the strain clamp connector according to claim 3, wherein phased array equipment is used for detection immediately after the steel core and the steel anchor are crimped, the crimped section is in a regular hexagon shape, and data acquisition is performed on six surfaces so as to realize that a probe uniformly sweeps all crimped positions.
8. The ultrasonic testing method of the strain clamp connector as claimed in claim 6, wherein a phased array ultrasonic transducer is used to concentrate the acoustic energy at the test points by emitting a focused acoustic beam, thereby achieving high test resolution.
9. An ultrasonic testing system for strain clamp connectors, which is used for assisting in performing the ultrasonic testing method for strain clamp connectors as claimed in any one of claims 1 to 8, and comprises: a monitor, a scanner and a probe; the system comprises a hardware system, a software system and a power supply control network, wherein the hardware system and the software system are arranged in a monitor; the hardware system comprises a phased array receiving and sending module and a conventional receiving and sending module, the phased array receiving and sending module comprises an FPGA and a CPU, a 256MDDR3 plug-in piece is connected to the FPGA, and a memory chip is connected to the CPU plug-in piece; the software system comprises an open-source linux inner core, a GTK interface and a GCC; the power supply control network comprises an FPG control module and a single chip microcomputer control module; the FPG control module comprises TOFD high-low voltage control and PA high-low voltage control, and the single chip microcomputer control module controls the power switch, the core board power control and the peripheral device power supply control.
10. An electronic device comprising at least one processor and a memory; the memory stores computer execution instructions; the at least one processor executing computer-executable instructions stored by the memory causes the at least one processor to perform the strain clamp connector ultrasonic testing method of any of claims 1-8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211470016.XA CN115752309A (en) | 2022-11-22 | 2022-11-22 | Ultrasonic detection method and system for strain clamp connector and electronic equipment |
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| CN202211470016.XA CN115752309A (en) | 2022-11-22 | 2022-11-22 | Ultrasonic detection method and system for strain clamp connector and electronic equipment |
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| CN115752309A true CN115752309A (en) | 2023-03-07 |
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| CN202211470016.XA Pending CN115752309A (en) | 2022-11-22 | 2022-11-22 | Ultrasonic detection method and system for strain clamp connector and electronic equipment |
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