CN118091499A - Secondary cable core checking device and method based on voltage amplitude-frequency detection - Google Patents
Secondary cable core checking device and method based on voltage amplitude-frequency detection Download PDFInfo
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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Abstract
The invention belongs to the technical field of cable core detection, and particularly provides a secondary cable core checking device and method based on voltage amplitude-frequency detection, wherein the device comprises a power supply control end, a power supply branch connected with a wiring jack of a first aviation plug connecting wire is further arranged at the power supply control end, the power supply branch is sequentially controlled to be connected with an anode or a cathode of the frequency conversion alternating current power supply module, a detection branch connected with the wiring jack of a second aviation plug connecting wire is arranged at a detection processing end, and each detection branch is provided with an amplitude-frequency detection module for collecting voltage amplitude and frequency; the detection processing end matches the detection branch corresponding to the power supply branch connected with the wire core according to the voltage amplitude and frequency output by the variable-frequency alternating-current power supply module and the voltage amplitude and frequency detected by the amplitude-frequency detection module and outputs the checked wire core. The checking speed is high, the accuracy is high, and the checking method is not easy to be interfered by external environment.
Description
Technical Field
The invention relates to the technical field of power cable core detection, in particular to a secondary cable core checking device and method based on voltage amplitude-frequency detection.
Background
The secondary cable laying is a common work in the transformation process of newly-built or various relay protection equipment of a transformer substation. The core of the secondary cable can be accessed to the operation equipment only by checking and determining the corresponding relation between the cores at the two ends, so that the related functions are realized. Once the wire core access sequence is wrong, the equipment cannot realize the corresponding function, and serious accidents such as misoperation tripping of the transformer substation and the like occur, so that the operation safety of the power grid is seriously influenced. Therefore, developing an accurate, convenient and quick multi-core secondary cable core checking device has important value and significance.
The most commonly used secondary cable core verification method in field work is the manual core verification method. Two workers separate the two ends of the cable to be checked, one worker grounds each wire core of one end of the cable according to the wire core, the other worker respectively measures whether each wire core is connected to a ground loop or not by using the on-off function of a measuring loop of the universal meter, and the two ends correspond to the same wire core when the loop is connected. The method has the advantages that the defects are obvious, workers at two ends need to alternately measure each wire core in sequence, the work needs to be repeated for a plurality of times, the operation is tedious, and the efficiency is extremely low. At least more than two workers are needed to finish each work smoothly, and the occupied labor resources are more. Furthermore, the accuracy of the verification is also affected by whether the work site ground point is good.
In addition, various novel special secondary cable nuclear line devices are applied to the construction sites of various substations in succession. Compared with manual methods, the device has the advantages of improved accuracy, complicated wiring, complex operation, heavy volume, requirement for external power supply and the like, and inconvenient use, so that the device cannot be applied and popularized on a large scale.
Disclosure of Invention
Aiming at the problems of complicated wiring and complex operation of the conventional secondary cable core device, the invention provides a secondary cable core checking device and method based on voltage amplitude-frequency detection.
In a first aspect, the present invention provides a secondary cable core checking device based on voltage amplitude-frequency detection, which includes a power supply control end and a detection processing end;
The power supply control end is connected with a first aviation plug connecting wire, the detection processing end is connected with a second aviation plug connecting wire, and the first aviation plug connecting wire and the second aviation plug connecting wire are respectively provided with crocodile clips; the power supply control end is connected with one end of a secondary cable core to be checked through an alligator clip of a first aviation plug connecting wire, and the other end of the secondary cable core to be checked is connected with the detection processing end through an alligator clip of a second aviation plug connecting wire;
The power supply control end is provided with a variable-frequency alternating-current power supply module for outputting alternating currents with the same amplitude and different frequencies, and is also provided with a power supply branch connected with a wiring jack of a first aviation plug connecting wire, the power supply branch is controlled to be connected with the positive pole or the negative pole of the variable-frequency alternating-current power supply module, and only one power supply branch is connected with the positive pole of the variable-frequency alternating-current power supply module at a time;
The detection processing end is provided with detection branches connected with the wiring jacks of the second aviation plug connecting wires, and each detection branch is provided with a amplitude-frequency detection module for collecting voltage amplitude and frequency; the detection processing end matches the detection branch corresponding to the power supply branch connected with the wire core according to the voltage amplitude and frequency output by the variable-frequency alternating-current power supply module and the voltage amplitude and frequency detected by the amplitude-frequency detection module and outputs the checked wire core.
As the optimization of the technical scheme of the invention, the power supply control end is provided with a plurality of power supply branch circuits corresponding to the wiring holes of the first aviation plug connecting wire, and the corresponding power supply branch circuits are sequentially controlled to be connected into the positive electrode or the negative electrode of the variable-frequency alternating-current power supply module;
the detection processing end is provided with a plurality of detection branches corresponding to the wiring holes of the second aviation plug connecting wires, and each detection branch is provided with an amplitude-frequency detection module.
As the optimization of the technical scheme of the invention, each power supply branch is provided with a switch control unit, the switch control unit is connected with a first singlechip, and the variable-frequency alternating-current power supply module is connected with the first singlechip; the public end of each switch control unit is connected with one wiring jack of the first aviation plug connecting wire, the normally closed end of the switch control unit is connected with the negative electrode of the variable-frequency alternating-current power supply module, and the normally open end of the switch control unit is connected with the positive electrode of the variable-frequency alternating-current power supply module.
As the optimization of the technical scheme of the invention, the power supply control end comprises a first shell, a first display module connected with the first singlechip is arranged on the first shell, and the first display module is used for displaying specific control information of a control unit of the control switch of the first singlechip.
As the optimization of the technical scheme of the invention, each detection branch is provided with a resistor, and the amplitude-frequency detection module is connected with the resistor in parallel; the amplitude-frequency detection module is also connected with a second singlechip, and the first singlechip is connected with the second singlechip; the first singlechip controls the switch control unit to act and simultaneously sends trigger information to the second singlechip to control the amplitude-frequency detection module to start the detection of the voltage amplitude and the frequency;
the first end of each resistor is connected with one wiring hole of the second aviation plug connecting wire, and the second ends of the resistors on all detection branches are connected.
As the optimization of the technical scheme of the invention, the detection processing end comprises a second shell, a second display module connected with a second singlechip is arranged on the second shell, and the second display module is used for displaying the connection state of the switch control unit, the voltage amplitude and frequency detected by the amplitude-frequency detection module and the nuclear line result.
As the optimization of the technical scheme of the invention, the amplitude-frequency detection module comprises a voltage amplitude detection unit and a power frequency detection unit which are connected with the second singlechip.
As the optimization of the technical scheme of the invention, a first circuit board is arranged in the first shell, and the first singlechip and the switch control unit are arranged on the first circuit board; an aviation plug interface which is spliced with the first aviation plug connecting wire is arranged on the first shell;
A second circuit board is arranged in the second shell, and the first resistor and the amplitude-frequency detection module are both arranged on the second circuit board; and the second shell is also provided with an aviation plug interface which is spliced with a second aviation plug connecting wire.
In a second aspect, the present invention further provides a secondary cable core checking method based on voltage amplitude-frequency detection, including the following steps:
The method comprises the steps that a first aviation plug connecting wire is inserted into a power supply control end, a second aviation plug connecting wire is inserted into a detection processing end, crocodile clamps of the first aviation plug connecting wire are respectively connected with one end of a secondary cable core to be checked, and crocodile clamps of the second aviation plug connecting wire are respectively connected with the other end of the secondary cable core to be checked;
when the wiring of each part is finished, the normally closed end of the switch control unit is connected to the negative electrode of the variable-frequency alternating-current power supply, the switch control unit is controlled to act so that the public end of the switch control unit is connected with the normally open end to enable the corresponding power supply branch to be connected to the positive electrode of the variable-frequency alternating-current power supply, meanwhile, the variable-frequency alternating-current power supply sequentially and correspondingly outputs the same amplitude frequency multiplication voltage, when the next power supply branch is connected to the positive electrode of the variable-frequency alternating-current power supply, the last power supply branch is restored to the state of being connected to the negative electrode of the variable-frequency alternating-current power supply, and only one power supply branch is always connected to the positive electrode of the variable-frequency alternating-current power supply;
when each power supply branch is connected with the positive electrode of the variable-frequency alternating-current power supply, the amplitude-frequency detection module of each detection branch at the detection processing end detects the voltage amplitude and the frequency of each detection branch in real time;
determining a power supply branch corresponding to a secondary cable core to be checked, which is connected with a power supply control end, according to a frequency detection result, and simultaneously obtaining a detection branch with the maximum voltage amplitude of a detection processing end; and further determining that the wire core connected with the power supply branch and the wire core connected with the detection branch are both ends of the same wire core.
The method further comprises the steps of: the detection processing end displays the detection result and the epipolar line result in the second display module.
From the above technical scheme, the invention has the following advantages:
1. the secondary cable core checking device is simple to operate and convenient to wire. The aviation plug connecting wire is connected with the detection processing end and the power supply control end by adopting an aviation plug design, and the connection part of the aviation plug connecting wire and the cable core is designed by adopting an crocodile clip, so that the connection process is convenient and quick. And the cable core does not need to be connected with the aviation plug connecting wire according to a specific sequence, so that the core wire function is not influenced by complete blind connection, and the working efficiency is greatly improved.
2. The secondary cable core checking device is convenient to carry and can be operated by a single person. The main functions of the device are realized by means of a high-performance singlechip or an integrated circuit, and the detection processing end and the power supply control end can be driven by using a power supply module without an external wired power supply. The device has small whole volume and is very convenient to use in multi-place and multi-scene transfer work.
3. The core wire result of the secondary cable core checking device is accurate and stable, the core wire process is realized through the switching circuit structure and the power frequency, core wire checking is performed in a state of a steady-state circuit, the accuracy is high, and the influence of an external interference signal or the grounding condition of a working place is avoided.
4. The secondary cable core checking device is low in manufacturing cost and good in economical efficiency. The core line principle of the device does not need to use various expensive and precise signal generating and receiving equipment, and has low manufacturing cost and good economical efficiency.
In addition, the invention has reliable design principle, simple structure and very wide application prospect.
It can be seen that the present invention has outstanding substantial features and significant advances over the prior art, as well as its practical advantages.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
Fig. 1 is a schematic connection diagram of an apparatus according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an aviation plug connection line in an embodiment of the invention.
FIG. 3 is a schematic diagram of an external structure of a detection processing end according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of an equivalent circuit of a core wire in an embodiment of the invention.
Fig. 5 is a 4-core cable core equivalent circuit in an embodiment of the invention.
Fig. 6 is an equivalent circuit of the 4-core cable core in the embodiment of the present invention when T2 is turned on.
Fig. 7 is a schematic flow chart of a method in an embodiment of the invention.
In the figure, 20-shell, 21-display module, 201-aviation plug interface, 202-aviation plug housing, 203-flat cable, 204-crocodile clip, 205-numbered soft sleeve.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
As shown in fig. 1, the embodiment of the invention provides a secondary cable core checking device based on voltage amplitude-frequency detection, which comprises a power supply control end and a detection processing end; the power supply control end is connected with a first aviation plug connecting wire, the detection processing end is connected with a second aviation plug connecting wire, and the first aviation plug connecting wire and the second aviation plug connecting wire are respectively provided with crocodile clips; the power supply control end is connected with one end of a secondary cable core to be checked through an alligator clip of a first aviation plug connecting wire, and the other end of the secondary cable core to be checked is connected with the detection processing end through an alligator clip of a second aviation plug connecting wire;
The power supply control end is provided with a variable-frequency alternating-current power supply module for outputting alternating currents with the same amplitude and different frequencies, and is also provided with a power supply branch connected with a wiring jack of a first aviation plug connecting wire, the power supply branch is controlled to be connected with the positive pole or the negative pole of the variable-frequency alternating-current power supply module, and only one power supply branch is connected with the positive pole of the variable-frequency alternating-current power supply module at a time;
The detection processing end is provided with detection branches connected with the wiring jacks of the second aviation plug connecting wires, and each detection branch is provided with a amplitude-frequency detection module for collecting voltage amplitude and frequency; the detection processing end matches the detection branch corresponding to the power supply branch connected with the wire core according to the voltage amplitude and frequency output by the variable-frequency alternating-current power supply module and the voltage amplitude and frequency detected by the amplitude-frequency detection module and outputs the checked wire core.
In some embodiments, the power supply control end is provided with a plurality of power supply branches corresponding to the wiring holes of the first aviation plug connecting wire, and sequentially controls the corresponding power supply branches to be connected to the positive electrode or the negative electrode of the variable-frequency alternating-current power supply module; the detection processing end is provided with a plurality of detection branches corresponding to the wiring holes of the second aviation plug connecting wires, and each detection branch is provided with an amplitude-frequency detection module.
In some embodiments, each power supply branch is provided with a switch control unit, the switch control unit is connected with a first singlechip, and the variable-frequency alternating-current power supply module is connected with the first singlechip; the public end of each switch control unit is connected with one wiring jack of the first aviation plug connecting wire, the normally closed end of the switch control unit is connected with the negative electrode of the variable-frequency alternating-current power supply module, and the normally open end of the switch control unit is connected with the positive electrode of the variable-frequency alternating-current power supply module.
In some embodiments, the power supply control end includes a first housing, and a first display module connected to the first single-chip microcomputer is disposed on the first housing, where the first display module is used to display specific control information of the first single-chip microcomputer control switch control unit. Each detection branch is provided with a resistor, and the amplitude-frequency detection module is connected with the resistor in parallel; the amplitude-frequency detection module is also connected with a second singlechip, and the first singlechip is connected with the second singlechip; the first singlechip controls the switch control unit to act and simultaneously sends trigger information to the second singlechip to control the amplitude-frequency detection module to start the detection of the voltage amplitude and the frequency;
the first end of each resistor is connected with one wiring hole of the second aviation plug connecting wire, and the second ends of the resistors on all detection branches are connected.
The detection processing end comprises a second shell, a second display module connected with the second singlechip is arranged on the second shell, and the second display module is used for displaying the connection state of the switch control unit, the voltage amplitude and frequency detected by the amplitude-frequency detection module and the nuclear line result. The amplitude frequency detection module comprises a voltage amplitude detection unit and a power frequency detection unit which are connected with the second singlechip.
A first circuit board is arranged in the first shell, and the first singlechip and the switch control unit are arranged on the first circuit board; an aviation plug interface which is spliced with the first aviation plug connecting wire is arranged on the first shell; a second circuit board is arranged in the second shell, and the first resistor and the amplitude-frequency detection module are both arranged on the second circuit board; and the second shell is also provided with an aviation plug interface which is spliced with a second aviation plug connecting wire.
It should be noted that, in the embodiment of the present invention, the aviation plug connection wire includes a first aviation plug connection wire and a second aviation plug connection wire, and the aviation plug connection wire has the same structure, as shown in fig. 2, specifically includes an aviation plug interface 201, an aviation plug housing 202, a flat cable 203, an alligator clip 204, and a number soft sleeve 205 sleeved on each wire core. The power supply control end and the detection processing end have similar appearance structures, for example, the detection processing end is shown in fig. 3, and a display module 21 and an aviation plug interface 201 are arranged on the shell 20.
One end of the aviation plug connecting wire is connected with the power supply control end and the detection processing end in the form of an aviation plug interface, and the other end of the aviation plug connecting wire is provided with a plurality of crocodile clamp test wires for clamping cable cores to be checked to connect. The middle part adopts the winding displacement design, prevents that test line winding is mixed and disorderly. In order to clearly show the correspondence between the cores of the cable to be tested, the test alligator clips connected to the cores are numbered with the number soft sleeves 205, respectively. When the number of the connecting holes of the aviation plug connecting wire is 26 in the device, the crocodile clips at the detection processing end are marked with a … … z letter number, and the crocodile clips at the power supply control end are marked with a1 … … 26 number. Thus, each cable core clamped by the alligator clip is uniquely numbered. After the aviation plug connecting wire is respectively connected with the power supply control end, the detection processing end and the cable core, the nuclear line equivalent circuit in fig. 4 can be obtained. Each crocodile clip test wire is connected to one branch of the power supply control end and the detection processing end through a jack in the aviation plug.
The appearance of the detection processing end is shown in fig. 3, and the surface of the detection processing end is a touchable display screen used for adjusting parameters and displaying the core checking result. The bottom has aviation plug interface, need link to each other with aviation plug connecting wire when the sinle silk is checked. An integrated circuit board is arranged inside, and each detection branch corresponds to a wiring jack in the aviation socket. As shown in fig. 4, the structure of each detection branch is divided into two parts, namely a resistor R and an amplitude-frequency detection module. The amplitude-frequency detection module can detect the amplitude and the frequency of alternating current voltage at two ends of R. The internal resistance of the amplitude-frequency detection module is large and approximates to an open circuit state.
The power supply control end and the detection processing end have the same appearance and different internal structures. The equivalent circuit of the power supply control end is shown in fig. 4. A plurality of power supply branches corresponding to the aviation plug wiring holes are also arranged in the equivalent circuit of the power supply control end. The power supply branch route switch control unit T is controlled by the first singlechip according to a programming program, and the corresponding power supply branch is sequentially connected into the positive pole or the negative pole of the variable-frequency alternating-current power supply. The variable-frequency alternating-current power supply is connected with the first singlechip and outputs sine alternating-current voltages with the same amplitude and different frequencies when the circuit structure is changed according to the control of a programming program.
The core wire principle of the device will be described below with reference to fig. 5 by taking a 4-core cable as an example, assuming that the aviation plug draws out 6 alligator clip test wires. The 6 crocodile clip test lines at the detection processing end are respectively numbered as follows: a … … f, the 6 crocodile clip test lines at the power supply control end are respectively numbered as follows: 1 … …, each number also corresponds to a branch of the detection processing side or the power supply control side. The detection processing end and the power supply control end are inserted into the aviation plug, and the cable cores on the two sides are clamped and connected with the crocodile clamp according to any sequence, so that the cable cores do not need to be connected in a specific sequence. Fig. 5 shows only one possible way of wiring.
After the wiring of each part is finished, the core wire can be performed. The initial state of the circuit is that the switch control elements T1 … … T6 are connected to the negative pole of the variable-frequency alternating-current power supply. After the nuclear line starts, the first singlechip programming program of the power supply control end respectively and sequentially connects the 1 … … power supply branches to the positive electrode of the variable-frequency alternating-current power supply according to the sequence of T1 … … T6, and meanwhile, the variable-frequency alternating-current power supply sequentially outputs the same-amplitude frequency multiplication voltage of u (T) =asin (ωt), … …, u (T) =asin (6ωt). When the next branch is connected to the positive pole of the power supply, the last branch is restored to the state of being connected to the negative pole of the variable-frequency alternating-current power supply, and only one branch is always connected to the positive pole of the variable-frequency alternating-current power supply. For example, in the first stage T1, the power supply anode is connected to the power supply voltage u (T) =asin (ωt), and the rest T are connected to the variable-frequency ac power supply cathode. In the next stage, the T2 is connected to the positive pole of the variable-frequency alternating-current power supply, the power supply voltage is changed into u (T) =Asin (2ωt), the T1 is restored to be connected to the negative pole of the variable-frequency alternating-current power supply, and the state that only one branch of the T2 is connected to the positive pole of the variable-frequency alternating-current power supply is still maintained. And the like, until T6 is connected to the positive pole of the variable-frequency alternating-current power supply, the connected voltage is u (T) =Asin (6 ωt), and the rest T is connected to the negative pole of the power supply. And when the circuit structure of the power supply control end changes each time, the amplitude-frequency detection module of each detection branch circuit of the detection processing end detects the voltage amplitude and the frequency of the two ends of the resistor R of each detection branch circuit in real time. For example, when the T1 is connected to the positive power supply, since there is no current loop, no voltage is applied to the detection processing end, and the amplitude-frequency detection module has no measurement result. At this time, it is explained that the alligator clip No. 1 has no connection core. When the T2 contact is connected to the positive pole of the variable frequency alternating current power supply, the circuit is switched on, and the equivalent circuit is shown in figure 6. At this time, the amplitude-frequency detection modules of the a, b, d, f branches can all detect the voltage with the frequency of 2ω, but the voltage amplitude detection results are different. As can be seen from the equivalent circuit of fig. 6, since the parallel structure of the a branch and the b, d, and f branches are connected in series, the voltage amplitude at the two ends of R in the a branch is the largest. According to the voltage frequency detection result of 2 omega, the wire core connected with the power supply control end is the wire core clamped by the No. 2 crocodile clamp, and the wire core corresponding to the detection processing end is the wire core of the branch with the maximum voltage amplitude connected with the No. a crocodile clamp. Thus, it is determined that a and 2 are both ends of the same wire core, thereby completing the checking of one wire core. The process of checking the remaining cores is exactly the same. After all branches of T1 … … T6 are connected to the anode of the variable-frequency alternating-current power supply, the core wire process of all wire cores is completed. All sequences of actions and results are shown in table 1.
TABLE 1
According to the voltage amplitude-frequency detection results in table 1, the corresponding relation of all 4-core cables at the two ends of the cable can be determined. The core principle of the cable with more cores is the same as that of the 4-core cable in the example, and only more detection branches are integrated in the detection processing end and the power supply control end, and meanwhile, the output frequency range of the power supply voltage is increased.
As shown in fig. 7, the embodiment of the invention further provides a secondary cable core checking method based on voltage amplitude-frequency detection, which comprises the following steps:
step one: the method comprises the steps that a first aviation plug connecting wire is inserted into a power supply control end, a second aviation plug connecting wire is inserted into a detection processing end, crocodile clamps of the first aviation plug connecting wire are respectively connected with one end of a secondary cable core to be checked, and crocodile clamps of the second aviation plug connecting wire are respectively connected with the other end of the secondary cable core to be checked;
Step two: after the wiring of each part is finished, the normally closed end of the switch control unit is connected to the negative electrode of the variable-frequency alternating-current power supply, the switch control unit is controlled to act sequentially, so that the public end of the switch control unit is connected with the normally open end, the corresponding power supply branch is connected to the positive electrode of the variable-frequency alternating-current power supply, meanwhile, the variable-frequency alternating-current power supply sequentially and correspondingly outputs the same amplitude frequency multiplication voltage, when the next power supply branch is connected to the positive electrode of the variable-frequency alternating-current power supply, the last power supply branch is restored to the state of being connected to the negative electrode of the variable-frequency alternating-current power supply, and only one power supply branch is always connected to the positive electrode of the variable-frequency alternating-current power supply;
Step 3: when each power supply branch is connected with the positive electrode of the variable-frequency alternating-current power supply, the amplitude-frequency detection module of each detection branch at the detection processing end detects the voltage amplitude and the frequency of each detection branch in real time;
step 4: determining a power supply branch corresponding to a secondary cable core to be checked, which is connected with a power supply control end, according to a frequency detection result, and simultaneously obtaining a detection branch with the maximum voltage amplitude of a detection processing end; and further determining that the wire core connected with the power supply branch and the wire core connected with the detection branch are both ends of the same wire core.
Step 5: the detection processing end displays the detection result and the epipolar line result in the second display module.
The core wire principle of the device will be described below with reference to fig. 5 by taking a 4-core cable as an example, assuming that the aviation plug draws out 6 alligator clip test wires. The 6 crocodile clip test lines at the detection processing end are respectively numbered as follows: a … … f, the 6 crocodile clip test lines at the power supply control end are respectively numbered as follows: 1 … …, each number also corresponds to a branch of the detection processing side or the power supply control side. The detection processing end and the power supply control end are inserted into the aviation plug, and the cable cores on the two sides are clamped and connected with the crocodile clamp according to any sequence, so that the cable cores do not need to be connected in a specific sequence. Fig. 5 shows only one possible way of wiring.
After the wiring of each part is finished, the core wire can be performed. The initial state of the circuit is that the switch control elements T1 … … T6 are connected to the negative pole of the variable-frequency alternating-current power supply. After the nuclear line starts, the first singlechip programming program of the power supply control end respectively and sequentially connects the 1 … … power supply branches to the positive electrode of the variable-frequency alternating-current power supply according to the sequence of T1 … … T6, and meanwhile, the variable-frequency alternating-current power supply sequentially outputs the same-amplitude frequency multiplication voltage of u (T) =asin (ωt), … …, u (T) =asin (6ωt). When the next branch is connected to the positive pole of the power supply, the last branch is restored to the state of being connected to the negative pole of the variable-frequency alternating-current power supply, and only one branch is always connected to the positive pole of the variable-frequency alternating-current power supply. For example, in the first stage T1, the power supply anode is connected to the power supply voltage u (T) =asin (ωt), and the rest T are connected to the variable-frequency ac power supply cathode. In the next stage, the T2 is connected to the positive pole of the variable-frequency alternating-current power supply, the power supply voltage is changed into u (T) =Asin (2ωt), the T1 is restored to be connected to the negative pole of the variable-frequency alternating-current power supply, and the state that only one branch of the T2 is connected to the positive pole of the variable-frequency alternating-current power supply is still maintained. And the like, until T6 is connected to the positive pole of the variable-frequency alternating-current power supply, the connected voltage is u (T) =Asin (6 ωt), and the rest T is connected to the negative pole of the power supply. And when the circuit structure of the power supply control end changes each time, the amplitude-frequency detection module of each detection branch circuit of the detection processing end detects the voltage amplitude and the frequency of the two ends of the resistor R of each detection branch circuit in real time. For example, when the T1 is connected to the positive power supply, since there is no current loop, no voltage is applied to the detection processing end, and the amplitude-frequency detection module has no measurement result. At this time, it is explained that the alligator clip No. 1 has no connection core. When the T2 contact is connected to the positive pole of the variable frequency alternating current power supply, the circuit is switched on, and the equivalent circuit is shown in figure 6. At this time, the amplitude-frequency detection modules of the a, b, d, f branches can all detect the voltage with the frequency of 2ω, but the voltage amplitude detection results are different. As can be seen from the equivalent circuit of fig. 6, since the parallel structure of the a branch and the b, d, and f branches are connected in series, the voltage amplitude at the two ends of R in the a branch is the largest. According to the voltage frequency detection result of 2 omega, the wire core connected with the power supply control end is the wire core clamped by the No. 2 crocodile clamp, and the wire core corresponding to the detection processing end is the wire core of the branch with the maximum voltage amplitude connected with the No. a crocodile clamp. Thus, it is determined that a and 2 are both ends of the same wire core, thereby completing the checking of one wire core. The process of checking the remaining cores is exactly the same. After all branches of T1 … … T6 are connected to the anode of the variable-frequency alternating-current power supply, the core wire process of all wire cores is completed.
Although the present invention has been described in detail by way of preferred embodiments with reference to the accompanying drawings, the present invention is not limited thereto. Various equivalent modifications and substitutions may be made in the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and it is intended that all such modifications and substitutions be within the scope of the present invention/be within the scope of the present invention as defined by the appended claims.
Claims (10)
1. The secondary cable core checking device based on voltage amplitude frequency detection is characterized by comprising a power supply control end and a detection processing end;
The power supply control end is connected with a first aviation plug connecting wire, the detection processing end is connected with a second aviation plug connecting wire, and the first aviation plug connecting wire and the second aviation plug connecting wire are respectively provided with crocodile clips; the power supply control end is connected with one end of a secondary cable core to be checked through an alligator clip of a first aviation plug connecting wire, and the other end of the secondary cable core to be checked is connected with the detection processing end through an alligator clip of a second aviation plug connecting wire;
The power supply control end is provided with a variable-frequency alternating-current power supply module for outputting alternating currents with the same amplitude and different frequencies, and is also provided with a power supply branch connected with a wiring jack of a first aviation plug connecting wire, the power supply branch is controlled to be connected with the positive pole or the negative pole of the variable-frequency alternating-current power supply module, and only one power supply branch is connected with the positive pole of the variable-frequency alternating-current power supply module at a time;
The detection processing end is provided with detection branches connected with the wiring jacks of the second aviation plug connecting wires, and each detection branch is provided with a amplitude-frequency detection module for collecting voltage amplitude and frequency; the detection processing end matches the detection branch corresponding to the power supply branch connected with the wire core according to the voltage amplitude and frequency output by the variable-frequency alternating-current power supply module and the voltage amplitude and frequency detected by the amplitude-frequency detection module and outputs the checked wire core.
2. The secondary cable core checking device based on voltage amplitude-frequency detection according to claim 1, wherein the power supply control end is provided with a plurality of power supply branch circuits corresponding to the wiring holes of the first aviation plug connecting wire, and sequentially controls the corresponding power supply branch circuits to be connected to the positive electrode or the negative electrode of the variable-frequency alternating-current power supply module;
the detection processing end is provided with a plurality of detection branches corresponding to the wiring holes of the second aviation plug connecting wires, and each detection branch is provided with an amplitude-frequency detection module.
3. The secondary cable core checking device based on voltage amplitude-frequency detection according to claim 2, wherein each power supply branch is provided with a switch control unit, the switch control unit is connected with a first single chip microcomputer, the public end of each switch control unit is connected with a wiring jack of a first aviation plug connecting wire, the normally closed end of the switch control unit is connected with the negative electrode of the variable-frequency alternating-current power supply module, and the normally open end of the switch control unit is connected with the positive electrode of the variable-frequency alternating-current power supply module.
4. The secondary cable core checking device based on voltage amplitude-frequency detection according to claim 3, wherein the power supply control end comprises a first shell, a first display module connected with the first single chip microcomputer is arranged on the first shell, and the first display module is used for displaying specific control information of the first single chip microcomputer control switch control unit.
5. The secondary cable core checking device based on voltage amplitude-frequency detection according to claim 4, wherein each detection branch is provided with a resistor, and the amplitude-frequency detection module is connected with the resistor in parallel; the amplitude-frequency detection module is also connected with a second singlechip, and the first singlechip is connected with the second singlechip; the first singlechip controls the switch control unit to act and simultaneously sends trigger information to the second singlechip to control the amplitude-frequency detection module to start the detection of the voltage amplitude and the frequency;
the first end of each resistor is connected with one wiring hole of the second aviation plug connecting wire, and the second ends of the resistors on all detection branches are connected.
6. The secondary cable core checking device based on voltage amplitude-frequency detection according to claim 5, wherein the detection processing end comprises a second shell, a second display module connected with a second single chip microcomputer is arranged on the second shell, and the second display module is used for displaying the connection state of the switch control unit, the voltage amplitude and frequency detected by the amplitude-frequency detection module and the core wire result.
7. The secondary cable core checking device based on voltage amplitude-frequency detection according to claim 6, wherein the amplitude-frequency detection module comprises a voltage amplitude detection unit and a power frequency detection unit which are connected with the second single chip microcomputer.
8. The secondary cable core checking device based on voltage amplitude-frequency detection according to claim 7, wherein a first circuit board is arranged in the first shell, and the first singlechip and the switch control unit are arranged on the first circuit board; an aviation plug interface which is spliced with the first aviation plug connecting wire is arranged on the first shell;
A second circuit board is arranged in the second shell, and the first resistor and the amplitude-frequency detection module are both arranged on the second circuit board; and the second shell is also provided with an aviation plug interface which is spliced with a second aviation plug connecting wire.
9. The secondary cable core checking method based on voltage amplitude-frequency detection is characterized by comprising the following steps of:
The method comprises the steps that a first aviation plug connecting wire is inserted into a power supply control end, a second aviation plug connecting wire is inserted into a detection processing end, crocodile clamps of the first aviation plug connecting wire are respectively connected with one end of a secondary cable core to be checked, and crocodile clamps of the second aviation plug connecting wire are respectively connected with the other end of the secondary cable core to be checked;
After the wiring of each part is finished, the normally closed end of the switch control unit is connected to the negative electrode of the variable-frequency alternating-current power supply, the switch control unit is controlled to act sequentially, so that the public end of the switch control unit is connected with the normally open end, the corresponding power supply branch is connected to the positive electrode of the variable-frequency alternating-current power supply, meanwhile, the variable-frequency alternating-current power supply sequentially and correspondingly outputs the same amplitude frequency multiplication voltage, when the next power supply branch is connected to the positive electrode of the variable-frequency alternating-current power supply, the last power supply branch is restored to the state of being connected to the negative electrode of the variable-frequency alternating-current power supply, and only one power supply branch is always connected to the positive electrode of the variable-frequency alternating-current power supply;
when each power supply branch is connected with the positive electrode of the variable-frequency alternating-current power supply, the amplitude-frequency detection module of each detection branch at the detection processing end detects the voltage amplitude and the frequency of each detection branch in real time;
determining a power supply branch corresponding to a secondary cable core to be checked, which is connected with a power supply control end, according to a frequency detection result, and simultaneously obtaining a detection branch with the maximum voltage amplitude of a detection processing end; and further determining that the wire core connected with the power supply branch and the wire core connected with the detection branch are both ends of the same wire core.
10. The method for checking a secondary cable core based on voltage amplitude-frequency detection as claimed in claim 9, further comprising:
The detection processing end displays the detection result and the epipolar line result in the second display module.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3098012U (en) * | 2003-05-23 | 2004-02-19 | 黄 桂賢 | Network cable tester |
| US20190212380A1 (en) * | 2018-01-09 | 2019-07-11 | Hitachi Metals, Ltd. | Method for testing multicore cable, method for manufacturing multicore cable assembly, and multicore cable test device |
| CN110221157A (en) * | 2019-06-25 | 2019-09-10 | 国网山东省电力公司临朐县供电公司 | A kind of secondary cable core checking device |
| CN111175672A (en) * | 2020-01-06 | 2020-05-19 | 国网辽宁省电力有限公司电力科学研究院 | Automatic inspection device for wire sequence of prefabricated cable |
| CN113359064A (en) * | 2021-05-17 | 2021-09-07 | 国网山东省电力公司肥城市供电公司 | Cable core identification device and method |
| CN216144936U (en) * | 2021-08-30 | 2022-03-29 | 巴陵石化大成检修安装有限责任公司 | Cable core checking device |
| US20220252645A1 (en) * | 2020-11-18 | 2022-08-11 | Grace Technologies, Inc. | Wireless voltage measurement, testing and analytics system |
-
2024
- 2024-04-23 CN CN202410487577.3A patent/CN118091499B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3098012U (en) * | 2003-05-23 | 2004-02-19 | 黄 桂賢 | Network cable tester |
| US20190212380A1 (en) * | 2018-01-09 | 2019-07-11 | Hitachi Metals, Ltd. | Method for testing multicore cable, method for manufacturing multicore cable assembly, and multicore cable test device |
| CN110221157A (en) * | 2019-06-25 | 2019-09-10 | 国网山东省电力公司临朐县供电公司 | A kind of secondary cable core checking device |
| CN111175672A (en) * | 2020-01-06 | 2020-05-19 | 国网辽宁省电力有限公司电力科学研究院 | Automatic inspection device for wire sequence of prefabricated cable |
| US20220252645A1 (en) * | 2020-11-18 | 2022-08-11 | Grace Technologies, Inc. | Wireless voltage measurement, testing and analytics system |
| CN113359064A (en) * | 2021-05-17 | 2021-09-07 | 国网山东省电力公司肥城市供电公司 | Cable core identification device and method |
| CN216144936U (en) * | 2021-08-30 | 2022-03-29 | 巴陵石化大成检修安装有限责任公司 | Cable core checking device |
Non-Patent Citations (1)
| Title |
|---|
| 杨德森;张连勇;许红燕;: "控制电缆现场对线方式的改进", 电世界, no. 06, 5 June 2015 (2015-06-05) * |
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