CN115615310B - Method, equipment and system for detecting cable displacement - Google Patents
Method, equipment and system for detecting cable displacement Download PDFInfo
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- CN115615310B CN115615310B CN202211555358.1A CN202211555358A CN115615310B CN 115615310 B CN115615310 B CN 115615310B CN 202211555358 A CN202211555358 A CN 202211555358A CN 115615310 B CN115615310 B CN 115615310B
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Abstract
The embodiment of the invention discloses a method, equipment and a system for detecting cable displacement. The cable displacement detection device comprises: the probe is used for detecting the armor layer of the cable to be detected on the surface of the cable to be detected according to the detection signal sent by the signal receiving processor, receiving a feedback signal returned by the armor layer of the cable to be detected and returning the feedback signal to the signal processor; and the signal processor is connected with the probe and used for generating a detection signal, sending the detection signal to the probe and determining whether the armor layer and the sheath layer in the cable to be detected have relative displacement according to a feedback signal returned by the probe. The scheme provided by the invention can achieve the technical effect of effectively and accurately detecting whether the high-voltage cable is displaced.
Description
Technical Field
The invention relates to the field of electronic technology application, in particular to a method, equipment and a system for detecting cable displacement.
Background
Conventionally, the displacement of a high-voltage cable is detected, a hoop type marker is usually adopted to install a marker on the high-voltage cable, but according to the internal structure of the high-voltage cable, the outermost layer of the high-voltage cable is a sheath layer which is made of plastic, and the anti-pulling capability is not good; the inner armor layer of the high-voltage cable is a metal layer and is the most effective protective layer of the high-voltage cable.
In the related art, taking the hoop marking method as an example, if the hoop holds the high-voltage cable too tightly, the high-voltage cable may be damaged, and even if the high-voltage cable is held too tightly, it cannot be guaranteed that the hoop does not generate relative displacement with the cable.
In addition, the high-voltage cable can also have displacement inside the cable, namely, the displacement of the armor layer of the high-voltage cable relative to the sheath layer outside the cable cannot be measured by a hoop marking method, and the displacement of the armor layer of the high-voltage cable relative to the sheath layer outside the cable has the greatest damage to the high-voltage cable.
Aiming at the problem that whether the high-voltage cable is displaced or not can not be effectively and accurately detected in the prior art, an effective solution is not provided at present.
Disclosure of Invention
In order to solve the above technical problems, embodiments of the present invention are intended to provide a method, an apparatus, and a system for detecting cable displacement, so as to at least solve the problem that in the prior art, whether a high voltage cable is displaced or not cannot be effectively and accurately detected.
The technical scheme of the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a device for detecting cable displacement, including: the probe is used for detecting the armor layer of the cable to be detected on the surface of the cable to be detected according to the detection signal sent by the signal receiving processor, receiving a feedback signal returned by the armor layer of the cable to be detected and returning the feedback signal to the signal processor; the feedback signal is obtained by detecting an eddy current signal formed by a signal on a metal structure of the armor layer; and the signal processor is connected with the probe and used for generating a detection signal, sending the detection signal to the probe and determining whether the armor layer and the sheath layer in the cable to be detected have relative displacement according to a feedback signal returned by the probe.
Optionally, the probe comprises: the device comprises an excitation coil and a shell, wherein the shell contains the excitation coil; one end of the exciting coil is connected with the signal processor, the other end of the exciting coil is in contact with the cable to be tested through the shell and is used for receiving a detection signal sent by the signal processor through the exciting coil, detecting the armor layer of the cable to be tested, receiving a feedback signal returned by the armor layer of the cable to be tested through the exciting coil and returning the feedback signal to the signal processor.
Further, optionally, the probe includes a plurality of sets of excitation coils, and a distance between the excitation coils in each set of excitation coils is a preset value.
Optionally, the signal processor comprises: the device comprises a vibrator and a signal processing module, wherein the output end of the vibrator is connected with the input end of a probe and used for generating a detection signal and sending the detection signal to the probe; the output end of the signal processing module is connected with the input end of the vibrator, the input end of the signal processing module is connected with the output end of the probe and used for triggering the vibrator to generate a detection signal, receiving a feedback signal of an armor layer of the cable to be detected returned by the probe and determining whether the armor layer and a jacket layer inside the cable to be detected generate relative displacement or not according to the feedback signal.
Optionally, the apparatus for detecting cable displacement further includes: and the external port is connected with the computing equipment and is used for sending the feedback signal and/or the judgment result of whether the armor layer and the jacket layer inside the cable to be tested have relative displacement to the computing equipment so that the computing equipment performs calculation and comparison operation according to the feedback signal and/or the judgment result.
In a second aspect, an embodiment of the present invention provides a system for detecting a displacement of a cable, including: the detection device comprises a cable to be detected, a detection device for cable displacement and a calculation device, wherein a probe in the detection device for cable displacement sends a detection signal to detect an armor layer of the cable to be detected, receives a feedback signal returned by the armor layer of the cable to be detected, and determines whether the armor layer and a sheath layer in the cable to be detected generate relative displacement according to the feedback signal returned by the probe; the feedback signal is obtained by detecting an eddy current signal formed by a signal on a metal structure of the armor layer; the calculating equipment is connected with the cable displacement detecting equipment and is used for acquiring a judgment result of whether the relative displacement occurs to the armor layer and the sheath layer inside the cable to be detected or not and executing calculation comparison operation according to the judgment result; the detection equipment for the cable displacement comprises the detection equipment for the cable displacement.
In a third aspect, an embodiment of the present invention provides a method for detecting a cable displacement, which is applied to the apparatus for detecting a cable displacement, and includes: detecting an armor layer of the cable to be detected on the surface of the cable to be detected through a detection signal sent by a probe, and receiving a feedback signal returned by the armor layer of the cable to be detected; the feedback signal is obtained by detecting an eddy current signal formed by a signal on a metal structure of the armor layer; and determining whether the armor layer and the sheath layer in the cable to be tested have relative displacement according to the feedback signal.
Optionally, determining whether the relative displacement between the armor layer and the sheath layer inside the cable to be tested occurs according to the feedback signal includes: acquiring the signal strength of a feedback signal; calculating according to the preset relation between the signal intensity and the longitudinal detection distance to obtain the longitudinal detection distance; comparing the longitudinal detection distance with a pre-stored longitudinal detection distance, and if the longitudinal detection distance is the same as the pre-stored longitudinal detection distance, determining that the armor layer and the sheath layer in the cable to be detected do not generate relative displacement; and if the longitudinal detection distance is different from the pre-stored longitudinal detection distance, determining that the armor layer and the sheath layer in the cable to be detected generate relative displacement.
Further, optionally, after determining that the armor layer and the jacket layer inside the cable to be tested have relative displacement, the method further includes: detecting the incoming line of the cable to be detected at least twice to obtain a first longitudinal detection distance and a second longitudinal detection distance; calculating the displacement value of the relative displacement of the armor layer and the sheath layer in the cable to be detected according to the average value of the first longitudinal detection distance and the second longitudinal detection distance; wherein, according to the average value of first vertical detection distance and the vertical detection distance of second, calculate the displacement value that relative displacement takes place for armor and the restrictive coating of the inside cable that awaits measuring:
X=arcsin（（Y-β）/β）*2π/L；
x is the displacement value of relative displacement of the armor layer and the sheath layer, Y is the average value of the first longitudinal detection distance and the second longitudinal detection distance, beta is the half-wave height of the sine wave shape, and L is the distance of the length of the sine periodic wave.
Optionally, the preset relationship includes:
Y = V*λ；
wherein Y is the longitudinal detection distance, V is the signal intensity, lambda is the coefficient, and the coefficient is determined by calculating the coefficient accurate value by adopting multiple sampling.
The embodiment of the invention provides a method, equipment and a system for detecting cable displacement. The probe is used for detecting the armor layer of the cable to be detected on the surface of the cable to be detected according to the detection signal sent by the signal receiving processor, receiving a feedback signal returned by the armor layer of the cable to be detected and returning the feedback signal to the signal processor; the feedback signal is obtained by detecting an eddy current signal formed by a signal on a metal structure of the armor layer; the signal processor is connected with the probe and used for generating a detection signal, sending the detection signal to the probe and determining whether the armor layer and the sheath layer inside the cable to be detected displace relatively or not according to a feedback signal returned by the probe, so that the technical effect of effectively and accurately detecting whether the high-voltage cable displaces or not can be achieved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention and do not constitute a limitation of the invention. In the drawings:
fig. 1 is a schematic view of a cable displacement detecting apparatus according to an embodiment of the present invention;
fig. 2 is a schematic view of a cable to be tested in the cable displacement detection apparatus according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an armor layer in a cable displacement detection device according to an embodiment of the present invention;
fig. 4 is a schematic view illustrating that a probe in a cable displacement detection apparatus detects a cable to be detected according to an embodiment of the present invention;
fig. 5-7 are schematic views of a probe in a cable displacement detection device according to an embodiment of the present invention;
fig. 8-9 are schematic diagrams illustrating a relationship between a detection distance and an internal structure of a cable in a device for detecting a cable displacement according to an embodiment of the present invention;
FIG. 10 is a diagram illustrating a related art test for a cable under test;
fig. 11 is a schematic view of a cable displacement detecting system according to a second embodiment of the present invention;
fig. 12 is a schematic flowchart of a cable displacement detection method according to a third embodiment of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solutions of the present invention, 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.
It should be noted that the terms "first", "second", and the like in the description and claims of the present invention and the accompanying drawings are used for distinguishing different objects, and are not used for limiting a specific order.
It should be noted that the following embodiments of the present invention may be implemented individually, or may be implemented in combination with each other, and the embodiments of the present invention are not limited in this respect.
Example one
In a first aspect, an embodiment of the present invention provides a device for detecting cable displacement, and fig. 1 is a schematic diagram of the device for detecting cable displacement according to the first embodiment of the present invention; as shown in fig. 1, the detection apparatus for cable displacement according to the embodiment of the present application includes:
the system comprises a probe 12 and a signal processor 14, wherein the probe 12 is used for detecting an armor layer of a cable to be detected on the surface of the cable to be detected according to a detection signal sent by the signal receiving processor 14, receiving a feedback signal returned by the armor layer of the cable to be detected, and returning the feedback signal to the signal processor 14; the feedback signal is obtained by detecting an eddy current signal formed by a signal on a metal structure of the armor layer; and the signal processor 14 is connected with the probe 12 and is used for generating a detection signal, sending the detection signal to the probe 12 and determining whether the relative displacement occurs between the armor layer and the sheath layer in the cable to be detected according to a feedback signal returned by the probe 12.
Optionally, the probe 12 comprises: an excitation coil 121 and a housing 122, wherein the housing 122 contains the excitation coil 121; one end of the exciting coil 121 is connected to the signal processor 14, and the other end of the exciting coil contacts the cable to be tested through the outer shell 122, and is used for receiving the detection signal sent by the signal processor 14 through the exciting coil 121, detecting the armor layer of the cable to be tested, receiving the feedback signal returned by the armor layer of the cable to be tested through the exciting coil 121, and returning the feedback signal to the signal processor 14.
Further, optionally, the probe 12 includes multiple sets of excitation coils, and a distance between the excitation coils in each set of excitation coils is a preset value.
Optionally, the signal processor 14 includes: the vibrator 141 and the signal processing module 142, wherein an output end of the vibrator 141 is connected with an input end of the probe 12, and is used for generating a detection signal and sending the detection signal to the probe 12; the output end of the signal processing module 142 is connected with the input end of the vibrator 141, the input end of the signal processing module 142 is connected with the output end of the probe 12, and the signal processing module is used for triggering the vibrator 141 to generate a detection signal, receiving a feedback signal of the armor layer of the cable to be detected returned by the probe 12, and determining whether the armor layer and the jacket layer inside the cable to be detected generate relative displacement according to the feedback signal.
Optionally, the apparatus for detecting cable displacement provided in the embodiment of the present application further includes: and the external port is connected with the computing equipment and is used for sending the feedback signal and/or the judgment result of whether the armor layer and the jacket layer inside the cable to be tested have relative displacement to the computing equipment so that the computing equipment performs calculation and comparison operation according to the feedback signal and/or the judgment result.
Specifically, fig. 2 is a schematic diagram of a cable to be tested in the detection apparatus for cable displacement according to the first embodiment of the present invention; a cable to be detected, which is detected by the device for detecting cable displacement according to the embodiment of the present application, is shown in fig. 2, where an outermost layer of the cable to be detected is a sheath layer, and if the armor layer and the sheath layer displace, serious damage may be caused to the inside of the cable, where fig. 3 is a schematic diagram of the armor layer in the device for detecting cable displacement according to the embodiment of the present application; as shown in fig. 3, the structure of the armor layer is wavy, so the detection apparatus for cable displacement provided by the embodiment of the present application is based on the structure of the armor layer, and the structure of the probe 12 and the signal processor 14 is designed in the detection apparatus for cable displacement provided by the embodiment of the present application, and an excitation coil in the probe 12 is provided to send an excitation current so that the metal armor layer generates an eddy current. The exciting coil is converted into a receiving coil after the transmission is finished. When the cable to be measured is intact, the intensity of the feedback signal is determined by the distance between the probe and the cable to be measured.
Therefore, the detection equipment for the cable displacement can sense the distance between the high-voltage cable armor layer and the detection equipment under the condition of isolating the sheath layer. Fig. 4 is a schematic diagram of a probe in a cable displacement detection apparatus according to an embodiment of the present invention detecting a cable to be detected.
Fig. 5 to fig. 7 are schematic diagrams of a probe in a cable displacement detection apparatus according to an embodiment of the present invention. Fig. 5 is a top view of the probe 12, fig. 6 is a front view of the probe 12, and fig. 7 is a left view of the probe 12, in which multiple sets of excitation coils are disposed in the probe 12, each set of excitation coils can monitor an eddy current echo (i.e., a feedback signal in the embodiment of the present application) of an armor layer of a cable to be tested, and the distance between the probe 12 and the armor layer of the cable to be tested is detected according to the intensity of the eddy current echo.
The process of determining whether the relative displacement occurs between the armor layer and the sheath layer inside the cable to be tested according to the feedback signal returned by the probe 12 may include:
1: establishing a relation formula between the feedback strength induced by the exciting coil and the depth y-axis distance:
Y = V*λ；（1）
in the formula (1), Y is a longitudinal detection distance, V is a signal intensity, and lambda is a coefficient determined by calculating a coefficient accurate value by adopting multiple sampling.
2: fig. 8 to 9 are schematic diagrams illustrating a relationship between a detection distance and an internal structure of a cable in a detection apparatus for cable displacement according to an embodiment of the present invention, and as shown in fig. 8, a relationship between a longitudinal detection distance and a relative displacement between an armor layer and a jacket layer is as follows:
after the correction start point is the trough, as shown in fig. 9, Y is represented as:
Y=sin（X*L/2π）*β+β；
y is a longitudinal detection distance, X is relative displacement between the armor layer and the sheath layer, and L is a sine period length (the period is 0-2 pi); β is the half-wave height of the sine wave shape, and L and β are known quantities in the examples of the present application.
Based on the above, to obtain X, calculation may be performed through an inverse trigonometric function to obtain:
X=arcsin（（Y-β）/β）*2π/L；
x is the displacement value of relative displacement of the armor layer and the sheath layer, Y is the average value of the first longitudinal detection distance and the second longitudinal detection distance, beta is the half-wave height of the sine wave shape, and L is the distance of the sine periodic wave length.
In the embodiment of the application, the longitudinal detection distance is compared with the pre-stored longitudinal detection distance, and if the longitudinal detection distance is the same as the pre-stored longitudinal detection distance, it is determined that the armor layer and the sheath layer in the cable to be detected do not generate relative displacement; if the longitudinal detection distance is different from the pre-stored longitudinal detection distance, determining that the armor layer and the sheath layer in the cable to be detected have relative displacement; the pre-stored longitudinal detection distance is the measured longitudinal detection distance when the cable to be detected is initially installed.
In summary, the process of calculating X may be: detecting the incoming line of the cable to be detected at least twice to obtain a first longitudinal detection distance and a second longitudinal detection distance; and calculating the displacement value of the relative displacement of the armor layer and the sheath layer in the cable to be detected according to the average value of the first longitudinal detection distance and the second longitudinal detection distance, wherein the transverse displacement value X can be more accurately calculated through the detection of different positions of the plurality of exciting coils and the algorithm such as the average value. This measurement displacement is the displacement volume of armor relative probe 12, compares the oversheath layer that detects in the correlation technique more accurate, and wherein, fig. 10 is the schematic diagram to the detection of the cable that awaits measuring in the correlation technique, as shown in fig. 10, adopts staple bolt formula installation mark point on high tension cable among the correlation technique, if the staple bolt is too tight to high tension cable armful, will injure high tension cable to just, to the too tight of embracing high tension cable, also can not guarantee that the staple bolt does not produce relative displacement with the cable.
The embodiment of the invention provides a detection device for cable displacement. The probe is used for detecting the armor layer of the cable to be detected on the surface of the cable to be detected according to the detection signal sent by the receiving signal processor, receiving a feedback signal returned by the armor layer of the cable to be detected and returning the feedback signal to the signal processor; the signal processor is connected with the probe and used for generating a detection signal, sending the detection signal to the probe and determining whether the armor layer and the sheath layer inside the cable to be detected generate relative displacement according to a feedback signal returned by the probe, so that the technical effect of effectively and accurately detecting whether the high-voltage cable generates displacement can be achieved.
Example two
In a second aspect, an embodiment of the present invention provides a system for detecting cable displacement, and fig. 11 is a schematic diagram of the system for detecting cable displacement according to the second embodiment of the present invention, as shown in fig. 11, including: the method comprises the steps that a cable 82 to be detected, cable displacement detection equipment 84 and computing equipment 86 are adopted, wherein a probe in the cable displacement detection equipment 84 sends a detection signal to detect an armor layer of the cable 82 to be detected, receives a feedback signal returned by the armor layer of the cable 82 to be detected, and determines whether the armor layer and a sheath layer in the cable 82 to be detected generate relative displacement according to the feedback signal returned by the probe; the feedback signal is obtained by detecting an eddy current signal formed by a signal on a metal structure of the armor layer; the calculating device 86 is connected with the cable displacement detecting device 84, and is configured to obtain a determination result of whether the relative displacement occurs between the armor layer and the jacket layer inside the cable 82 to be detected, and perform a calculation comparison operation according to the determination result; wherein the cable displacement detection device 84 comprises the cable displacement detection device 84 described above.
Specifically, as shown in fig. 11, the computing device 86 may be a computer system, and the computing device 86 is connected to the cable displacement detection device 84, where the computing device 86 is connected to a signal processor in the cable displacement detection device 84, the signal processor triggers a detection signal, detects the cable 82 to be tested through a probe connected to the signal processor, obtains a feedback signal of an armor layer in the cable 82 to be tested through the probe, and analyzes the feedback signal by the signal processor to determine whether the armor layer and the jacket layer inside the cable 82 to be tested have relative displacement; the computer device 86 may also be connected to the signal processor to directly obtain the feedback signal and analyze the feedback signal in the computer device 86; and/or the calculating device 86 compares the judging result with a pre-stored numerical value which is not subjected to deviation, and the calculating device 86 compares the judging result with the pre-stored numerical value to generate a final judging result.
The detection device 84 for cable displacement may be the detection device for cable displacement in the first embodiment;
based on the above, as shown in fig. 11, the detecting device 84 for cable displacement designs a structure of a probe and a signal processor, and outputs excitation through the signal processor, and then an excitation coil in the probe sends excitation current to make the metal armor layer of the cable to be detected generate eddy current, the excitation coil is converted into a receiving coil after sending is completed, and returns a pickup signal to the signal processor, and the computer device 86 may also be connected to the signal processor to directly obtain a feedback signal and analyze the feedback signal in the computer device 86; and/or the calculating device 86 compares the judging result with a pre-stored numerical value which is not subjected to deviation, and the calculating device 86 compares the judging result with the pre-stored numerical value to generate a final judging result.
The embodiment of the invention provides a cable displacement detection system. A probe in the cable displacement detection equipment detects an armor layer of a cable to be detected, receives a feedback signal returned by the armor layer of the cable to be detected, and determines whether the armor layer and a sheath layer in the cable to be detected generate relative displacement according to the feedback signal returned by the probe; the calculating equipment is connected with the cable displacement detecting equipment and is used for acquiring a judgment result of whether the relative displacement occurs to the armor layer and the sheath layer inside the cable to be detected or not and executing calculation comparison operation according to the judgment result; the detection equipment for the cable displacement comprises the detection equipment for the cable displacement, so that the technical effect of effectively and accurately detecting whether the high-voltage cable is displaced or not can be achieved.
EXAMPLE III
In a third aspect, an embodiment of the present invention provides a method for detecting a cable displacement, which is applied to a device for detecting a cable displacement in the first embodiment, and fig. 12 is a schematic flow diagram of a method for detecting a cable displacement provided in a third embodiment of the present invention, as shown in fig. 12, the method for detecting a cable displacement in the embodiment of the present invention includes:
step S902, detecting the armor layer of the cable to be detected on the surface of the cable to be detected through the detection signal sent by the probe, and receiving a feedback signal returned by the armor layer of the cable to be detected; the feedback signal is obtained by detecting an eddy current signal formed by a signal on a metal structure of the armor layer;
and step S904, determining whether the armor layer and the sheath layer inside the cable to be tested have relative displacement according to the feedback signal.
Optionally, determining whether the armor layer and the jacket layer inside the cable to be tested have relative displacement according to the feedback signal in step S904 includes: acquiring the signal strength of a feedback signal; calculating according to the preset relation between the signal intensity and the longitudinal detection distance to obtain the longitudinal detection distance; comparing the longitudinal detection distance with a pre-stored longitudinal detection distance, and if the longitudinal detection distance is the same as the pre-stored longitudinal detection distance, determining that the armor layer and the sheath layer in the cable to be detected do not generate relative displacement; and if the longitudinal detection distance is different from the pre-stored longitudinal detection distance, determining that the armor layer and the sheath layer in the cable to be detected generate relative displacement.
The pre-stored longitudinal detection distance is the measured longitudinal detection distance when the cable to be detected is initially installed.
Further, optionally, after determining that the relative displacement occurs between the armor layer and the jacket layer inside the cable to be detected, the method for detecting the displacement of the cable in the embodiment of the present application further includes: detecting the incoming line of the cable to be detected at least twice to obtain a first longitudinal detection distance and a second longitudinal detection distance; calculating the displacement value of the relative displacement of the armor layer and the sheath layer in the cable to be detected according to the average value of the first longitudinal detection distance and the second longitudinal detection distance; wherein, according to the average value of first vertical detection distance and the vertical detection distance of second, calculate the displacement value that relative displacement takes place for armor and the restrictive coating of the inside cable that awaits measuring:
X=arcsin（（Y-β）/β）*2π/L；
x is the displacement value of relative displacement of the armor layer and the sheath layer, Y is the average value of the first longitudinal detection distance and the second longitudinal detection distance, beta is the half-wave height of the sine wave shape, and L is the distance of the length of the sine periodic wave.
Optionally, the preset relationship includes:
Y = V*λ；
wherein Y is the longitudinal detection distance, V is the signal intensity, and lambda is the coefficient determined by calculating the coefficient accurate value by adopting multiple sampling.
In an achievable mode, the transverse displacement value X can be calculated more accurately through algorithms such as an average value and the like through detection of different positions of the plurality of excitation coils in the embodiment of the application.
The displacement of measuring in this application embodiment is the displacement volume of armor relative probe, compares the oversheath layer that detects in the correlation technique more accurate.
Specifically, the method for detecting cable displacement provided by the embodiment of the present application may be applied to the apparatus for detecting cable displacement in the first embodiment.
The embodiment of the invention provides a method for detecting cable displacement. Detecting an armor layer of the cable to be detected on the surface of the cable to be detected through a probe, and receiving a feedback signal returned by the armor layer of the cable to be detected; whether relative displacement occurs to an armor layer and a jacket layer inside the cable to be detected or not is determined according to the feedback signal, and therefore the technical effect that whether displacement occurs to the high-voltage cable or not can be effectively and accurately detected can be achieved.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (7)
1. A cable displacement detection device, comprising:
a probe and a signal processor, wherein,
the probe is used for detecting the armor layer of the cable to be detected on the surface of the cable to be detected according to the received detection signal sent by the signal processor, receiving a feedback signal returned by the armor layer of the cable to be detected, and returning the feedback signal to the signal processor; wherein the feedback signal is obtained by an eddy current signal formed on the metal structure of the armor layer by the detection signal;
the signal processor is connected with the probe and is used for generating the detection signal, sending the detection signal to the probe and determining whether the armor layer and the sheath layer in the cable to be detected have relative displacement according to the feedback signal returned by the probe;
wherein, according to the feedback signal, determining whether the relative displacement of the armor layer and the sheath layer inside the cable to be tested occurs comprises: acquiring the signal strength of the feedback signal; calculating according to the preset relation between the signal intensity and the longitudinal detection distance to obtain the longitudinal detection distance; comparing the longitudinal detection distance with a pre-stored longitudinal detection distance, and if the longitudinal detection distance is the same as the pre-stored longitudinal detection distance, determining that the armor layer and the sheath layer in the cable to be detected do not generate relative displacement; if the longitudinal detection distance is different from the pre-stored longitudinal detection distance, determining that the armor layer and the sheath layer in the cable to be detected have relative displacement;
after the relative displacement of the armor layer and the sheath layer in the cable to be tested is determined, the method further comprises the following steps: detecting the incoming line of the cable to be detected at least twice to obtain a first longitudinal detection distance and a second longitudinal detection distance; calculating the displacement value of the relative displacement of the armor layer and the sheath layer in the cable to be detected according to the average value of the first longitudinal detection distance and the second longitudinal detection distance; wherein, according to the average value of the first longitudinal detection distance and the second longitudinal detection distance, calculating the displacement value of the relative displacement between the armor layer and the sheath layer inside the cable to be tested comprises:
X=arcsin（（Y-β）/β）*2π/L；
x is a displacement value of relative displacement of the armor layer and the sheath layer, Y is an average value of the first longitudinal detection distance and the second longitudinal detection distance, beta is a half-wave height of a sine wave shape, and L is a distance of a sine periodic wave length;
the preset relationship comprises:
Y = V*λ；
and Y is the longitudinal detection distance, V is the signal intensity, and lambda is a coefficient determined by calculating a coefficient accurate value by adopting multiple sampling.
2. The apparatus for detecting displacement of a cable according to claim 1, wherein the probe comprises:
the device comprises an exciting coil and a shell, wherein the shell contains the exciting coil;
one end of the exciting coil is connected with the signal processor, and the other end of the exciting coil is in contact with the cable to be tested through the shell and is used for receiving the detection signal sent by the signal processor through the exciting coil, detecting the armor layer of the cable to be tested, receiving the feedback signal returned by the armor layer of the cable to be tested through the exciting coil and returning the feedback signal to the signal processor.
3. The apparatus according to claim 2, wherein the probe comprises a plurality of sets of excitation coils, and the distance between the excitation coils in each set is a predetermined value.
4. The apparatus for detecting cable displacement according to claim 1, wherein the signal processor includes: a vibrator and a signal processing module, wherein,
the output end of the vibrator is connected with the input end of the probe and used for generating the detection signal and sending the detection signal to the probe;
the output end of the signal processing module is connected with the input end of the vibrator, the input end of the signal processing module is connected with the output end of the probe and used for triggering the vibrator to generate the detection signal, receiving a feedback signal of the armor layer of the cable to be detected returned by the probe, and determining whether the armor layer and the jacket layer inside the cable to be detected generate relative displacement according to the feedback signal.
5. The apparatus for detecting cable displacement according to claim 1, further comprising: and the external port is connected with computing equipment and is used for sending the judgment result of whether the feedback signal and/or the armor layer and the jacket layer inside the cable to be tested have relative displacement to the computing equipment so that the computing equipment performs calculation and comparison operation according to the feedback signal and/or the judgment result.
6. A cable displacement detection system, comprising:
a cable to be tested, a detection device for cable displacement and a calculation device, wherein,
a probe in the cable displacement detection equipment sends a detection signal to detect the armor layer of the cable to be detected, receives a feedback signal returned by the armor layer of the cable to be detected, and determines whether the armor layer and the sheath layer in the cable to be detected have relative displacement according to the feedback signal returned by the probe; the feedback signal is obtained by an eddy current signal formed on a metal structure of the armor layer by the detection signal;
the computing equipment is connected with the cable displacement detection equipment and is used for acquiring a judgment result of whether the armor layer and the sheath layer in the cable to be detected have relative displacement or not and executing calculation comparison operation according to the judgment result;
wherein the cable displacement detection device comprises the cable displacement detection device of any one of claims 1 to 5.
7. A cable displacement detection method applied to the cable displacement detection apparatus according to any one of claims 1 to 5, comprising:
detecting an armor layer of a cable to be detected on the surface of the cable to be detected through a detection signal sent by a probe, and receiving a feedback signal returned by the armor layer of the cable to be detected; wherein the feedback signal is obtained by an eddy current signal formed on the metal structure of the armor layer by the detection signal;
determining whether the armor layer and the jacket layer inside the cable to be tested have relative displacement or not according to the feedback signal;
the determining whether the armor layer and the sheath layer inside the cable to be tested generate relative displacement according to the feedback signal comprises the following steps: acquiring the signal strength of the feedback signal; calculating according to the preset relation between the signal intensity and the longitudinal detection distance to obtain the longitudinal detection distance; comparing the longitudinal detection distance with a pre-stored longitudinal detection distance, and if the longitudinal detection distance is the same as the pre-stored longitudinal detection distance, determining that the armor layer and the sheath layer in the cable to be detected do not generate relative displacement; if the longitudinal detection distance is different from the pre-stored longitudinal detection distance, determining that the armor layer and the sheath layer in the cable to be detected have relative displacement;
after the determining that the armor layer and the sheath layer inside the cable to be tested have relative displacement, the method further comprises the following steps:
detecting the incoming line of the cable to be detected at least twice to obtain a first longitudinal detection distance and a second longitudinal detection distance;
calculating a displacement value of relative displacement of the armor layer and the sheath layer in the cable to be detected according to the average value of the first longitudinal detection distance and the second longitudinal detection distance;
wherein, according to the average value of the first longitudinal detection distance and the second longitudinal detection distance, calculating the displacement value of the relative displacement between the armor layer and the sheath layer inside the cable to be tested comprises:
X=arcsin（（Y-β）/β）*2π/L；
x is a displacement value of relative displacement of the armor layer and the sheath layer, Y is an average value of the first longitudinal detection distance and the second longitudinal detection distance, beta is a half-wave height of a sine wave shape, and L is a distance of a sine periodic wave length;
the preset relationship comprises:
Y = V*λ；
and Y is the longitudinal detection distance, V is the signal intensity, and lambda is a coefficient determined by calculating a coefficient accurate value by adopting multiple sampling.
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| EP2843359B1 (en) * | 2013-08-26 | 2016-05-04 | Grundfos Holding A/S | Coupling with a drive-side coupling part and with an output-side coupling part |
| CN103591885B (en) * | 2013-10-24 | 2016-02-24 | 西安交通大学 | A kind of online lossless detection method of double-level-metal sleeve structure sweep bias |
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