Cable nuclear phase system
By using image acquisition technology to perform phase identification and mark matching verification at the beginning and end of the cable, the problem of load-end power consumption affecting the cable phase verification process is solved, achieving efficient and accurate phase verification and ensuring power grid safety.
Patent Information
- Application Number
- CN202511336542.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-18
- Publication Date
- 2025-12-05
AI Technical Summary
Existing cable phase matching technology cannot effectively achieve phase matching under normal power consumption conditions at the load end, leading to frequent phase misconnection accidents and affecting power grid safety.
Image acquisition technology is used to acquire images of the beginning and end of the cable through the first and second devices respectively. Phase identifiers and symbols are used for matching and verification to generate and transmit phase information, thereby realizing phase verification of the cable, upstream equipment and downstream equipment and avoiding power outage operations.
It improves the accuracy and efficiency of phase matching judgment, reduces human error, ensures the continuity of power supply at the load end during cable laying, and avoids the impact of power outages.
Smart Images
Figure CN121069036A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of cable laying technology, and more specifically, to a cable phase matching system. Background Technology
[0002] In cable repair, splicing, reconnection, and the addition of new tap changers, phase misconnection accidents frequently occur due to missing or incorrect phase sequence markings or gaps in the transmission of construction information. This can directly lead to systemic risks such as reverse rotation of motors on the user side and failure of dual power supply loop closure, seriously threatening the safe operation of the power grid.
[0003] To address the issue of phase misconnection, existing technologies often employ the ground resistance method. This method is relatively complex, requiring technicians to conduct tests using a megohmmeter near the connection point while simultaneously performing a cyclical phase-by-phase grounding operation manually at the remote end, repeating a process of "phase A grounding - testing - resistance feedback - discharging - phase reversal." However, this method has significant limitations. It can only perform the "core matching" operation under power outage conditions, meaning it can only verify the physical correspondence of the conductors. This reliance on power outages undoubtedly impacts the normal power supply to users at the load end.
[0004] Therefore, finding an effective way to successfully complete cable phase matching while ensuring normal power supply to users at the load end has become an urgent problem for those skilled in the art. Summary of the Invention
[0005] In view of this, this application provides a cable phase matching system to solve the shortcomings of existing phase matching technologies that cannot guarantee normal power supply to users at the load end.
[0006] To achieve the above objectives, the following solution is proposed:
[0007] A cable phase matching system includes a first device and a second device;
[0008] The first device acquires images of the target cable's head end and the upstream equipment after the target cable is connected to the power grid, and obtains a first image; based on the first image, it determines whether the head end of the target cable and the upstream equipment are phase matched.
[0009] The second device, after the target cable is connected to the power grid, acquires images of the end of the target cable and the downstream equipment to obtain a second image; based on the second image, it determines whether the end of the target cable and the downstream equipment are phase matched, generates a matching result, and sends it to the first device; wherein, both the beginning and end of the target cable are marked with phase identifiers; both the upstream equipment and the downstream equipment are marked with phase symbols;
[0010] After determining that the first end of the target cable is phase-matched with the upper-level device and receiving the matching result indicating that the end of the target cable is phase-matched with the lower-level device, the first device generates phase information reflecting the phase status of the target cable and transmits the phase information to the second device.
[0011] The second device evaluates whether the upper-level device and the lower-level device are phase-matched based on the phase information.
[0012] Optionally, the beginning of each core of the target cable is connected to each terminal of the upper-level device; the end of the target cable is connected to each terminal of the lower-level device; the beginning and end of each core of the target cable are marked with the phase identifier of the corresponding phase; each terminal of the upper-level device and the lower-level device is marked with the phase mark of the corresponding phase.
[0013] The first device further includes a first calibration module;
[0014] The second device also includes a second calibration module;
[0015] The first calibration module determines whether the beginning of the target cable is phase-matched with the upstream device based on the phase mark of the beginning of each wire core in the first image and the phase mark of the connected terminal.
[0016] The second calibration module determines whether the end of the target cable is phase-matched with the downstream device based on the phase identifier of the end of each wire core in the second image and the phase mark of the connected terminal.
[0017] Optionally, the phase identifier is a laser phase identifier; the phase mark is a laser phase mark;
[0018] The first calibration module includes a similarity comparison unit;
[0019] The similarity comparison unit determines the laser phase mark at the beginning of each wire core and the laser phase mark of the terminal connected to each wire core from the first image, and calculates the similarity between the laser phase mark at the beginning of each wire core and the laser phase mark of the terminal connected to it; when the similarity exceeds a preset similarity threshold, it determines that the corresponding wire core and its connected terminal are phase matched; when the similarity does not exceed the preset similarity threshold, it determines that the corresponding wire core and its connected terminal are phase mismatched.
[0020] Optionally, the phase identifier is a laser QR code mark; the phase symbol is a laser QR code symbol.
[0021] The first calibration module includes a barcode comparison unit;
[0022] The scanning comparison unit scans the laser QR code mark at the beginning of each wire core and the laser QR code mark on the terminal block connected to each wire core in the first image to obtain the phase symbol at the beginning of each wire core and the phase character of the terminal block connected to it, and calculates the similarity between the phase symbol at the beginning of each wire core and its corresponding phase character; when the similarity exceeds a preset similarity threshold, it determines that the corresponding wire core and its terminal block are phase matched; when the similarity does not exceed the preset similarity threshold, it determines that the corresponding wire core and its terminal block are phase mismatched.
[0023] Optionally, the first end of each core of the target cable is connected to each terminal of the upper-level equipment; the end of the target cable is connected to each terminal of the lower-level equipment.
[0024] The first device includes an information generation unit;
[0025] The information generation unit generates phase information that uniquely corresponds to the phase of each wire core, and transmits the phase information to the second device through the wire core and wireless communication.
[0026] Optionally, the second device includes a verification unit;
[0027] The verification unit receives the phase information of each wire core and determines whether the phase judgments of the first device and the second device on the same wire core are consistent based on the phase information of each wire core.
[0028] Optionally, the verification unit includes a verification subunit;
[0029] The verification subunit compares the phase information received via wireless communication with the phase information received via the corresponding wire core. If they match, the phase information of the corresponding wire core is decoded to obtain the target phase of the corresponding wire core. When the target phase of the corresponding wire core matches the phase of the terminal connected to its end, it is determined that the phase judgments of the first device and the second device for the wire core are consistent.
[0030] Optionally, the information generation unit includes a check code generation subunit;
[0031] The verification code generation subunit generates random numbers and signs the phase of each wire core based on the random numbers to obtain signature information. The signature information is then Trellis encoded and modulated to obtain the phase information of the corresponding wire core.
[0032] Optionally, passive LoRa repeaters are also included;
[0033] The passive LoRa repeater provides a wireless channel for the first device and the second device.
[0034] Optionally, the first device further includes an inspection unit;
[0035] The inspection unit determines whether the voltage, current, frequency, and phase difference of the upstream equipment meet the grid connection requirements, and generates a closing command when the grid connection requirements are met.
[0036] As can be seen from the above technical solution, the cable phase matching system provided in this application can include a first device and a second device; wherein, both the beginning and end of the target cable are marked with phase identifiers; both the upstream device and the downstream device are marked with phase symbols. Based on this, the first device, after the target cable is connected to the power grid, performs image acquisition on the beginning of the target cable and the upstream device to obtain a first image; based on the first image, it determines whether the beginning of the target cable and the upstream device are phase matched; the second device, after the target cable is connected to the power grid, performs image acquisition on the end of the target cable and the downstream device to obtain a second image; based on the second image, it determines whether the end of the target cable and the downstream device are phase matched, generates a matching result, and sends it to the first device; based on this, this application can utilize the first device and the second device to directly transmit data via image acquisition. By observing the correspondence between phase markers and phase symbols in the image, phase matching verification between the target cable head end and the upstream equipment, as well as phase matching verification between the target cable tail end and the downstream equipment, can be completed, allowing for the timely detection of potential phase problems at the head end. Compared to traditional methods that rely on manual testing and power outage testing, this method provides a more intuitive way to obtain phase information from the cable head end and the upstream equipment, while simplifying the judgment logic, improving judgment efficiency, reducing human error, and enhancing the accuracy of phase matching judgment. Furthermore, phase verification is completed directly through image acquisition without the need for power outage operations, thus avoiding impact on the load end and reducing the impact of cable laying and maintenance on residential electricity use. Subsequently, when determining that the beginning of the target cable is phase-matched with the upstream device and the end of the target cable is phase-matched with the downstream device, to avoid phase mismatch between the upstream and downstream devices, this application also sets up a phase verification process between the upstream and downstream devices. During this process, the first device of this application, after determining that the beginning of the target cable is phase-matched with the upstream device and receiving the matching result indicating that the end of the target cable is phase-matched with the downstream device, generates phase information reflecting the phase status of the target cable and transmits the phase information to the second device. The second device evaluates whether the upstream and downstream devices are phase-matched based on the phase information. Based on this, the first and second devices can determine whether the phase status of the beginning and end of the target cable is consistent based on the phase information, and thus determine whether the phases of the upstream and downstream devices are matched. It can be seen that this application, through a three-stage phase verification process, first achieves phase verification between the beginning and end of the target cable, and then completes phase verification between the upstream and downstream devices connected to the target cable. Through this series of operations, the phase matching of the entire link from the upstream equipment through the target cable to the downstream equipment is fully ensured to be correct; at the same time, the three phase verification processes do not require power outages, thus avoiding any impact on normal household electricity use. Attached Figure Description
[0037] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0038] Figure 1 This is a system architecture diagram of a cable phase matching system disclosed in an embodiment of this application;
[0039] Figure 2 This is a schematic diagram of the structure of a target cable disclosed in an embodiment of this application;
[0040] Figure 3 This is a schematic diagram of a cable phase grading scenario disclosed in an embodiment of this application;
[0041] Figures 1-3 The correspondence between component identification and figure reference numerals is shown below:
[0042] First device 1, second device 2, target cable 3, passive LoRa repeater 4. Detailed Implementation
[0043] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0044] The cable phase matching system of this application will now be described in detail with reference to the accompanying drawings. It should be noted that the orientation of the structures shown in the drawings is set for ease of understanding and does not limit the orientation of the embodiments of this disclosure in actual implementation. Furthermore, the shape and size of the structure, whether as a whole or in part, shown in the drawings are not limited to the actual shape and size.
[0045] See Figure 1 It can be seen that the cable phase matching system of this application may include a first device 1 and a second device 2.
[0046] The first device 1 and the second device 2 can communicate with each other.
[0047] After the target cable 3 is connected to the power grid, the first device 1 can acquire images of the head end of the target cable 3 and the upstream equipment to obtain a first image; and determine whether the head end of the target cable 3 and the upstream equipment are phase matched based on the first image.
[0048] The target cable 3 can be marked with phase markings at both its beginning and end; similarly, the upstream equipment can also be marked with phase markings.
[0049] Phase markings can be different colored paints or heat shrink sleeves representing phases, different characters representing phases, different QR codes that implicitly contain corresponding phase icons, or different barcodes that implicitly contain corresponding phase icons.
[0050] Similarly, phase symbols can be different colored paints or heat shrink sleeves representing phases, different characters representing phases, or different QR codes that implicitly contain corresponding phase characters.
[0051] The target cable 3 may contain conductors of different phases, such as phase A conductors, phase B conductors, and phase C conductors, and may also contain a neutral conductor (N) and a protective ground conductor (RE), such as... Figure 2 As shown.
[0052] Different phase markings can exist on different wire cores.
[0053] For example, the phase identifier of phase A conductor can be recorded on phase A conductor. Similarly, the phase identifier of phase B conductor can be recorded on phase B conductor. The phase identifier of phase C conductor can be recorded on phase C conductor.
[0054] The phase identifier and phase symbol can be of the same or different types.
[0055] After the target cable 3 is connected to the power grid, the second device 2 can acquire images of the end of the target cable 3 and the downstream equipment to obtain a second image; based on the second image, it determines whether the end of the target cable 3 and the downstream equipment are phase matched, generates a matching result, and sends it to the first device 1.
[0056] The upstream device can be the power supply side.
[0057] The downstream equipment can be on the load side, such as a distribution network switchgear.
[0058] The current from the upstream equipment can flow into the downstream equipment through the target cable 3.
[0059] The first device 1, upon determining that the first end of the target cable 3 is phase-matched with the upper-level device and receiving the matching result indicating that the end of the target cable 3 is phase-matched with the lower-level device, indicates that the first end of the target cable 3 is phase-matched with the upper-level device and the end of the target cable 3 is phase-matched with the lower-level device.
[0060] Under normal circumstances, the phase markings at the beginning and end of the target cable 3 are matched. When the target cable 3 is phase-matched with both the upstream and downstream equipment, the upstream and downstream equipment are also phase-matched. However, there are instances where the phase markings on the target cable 3 are incorrectly marked during production, resulting in situations where phase A of the upstream equipment is connected to phase A of the target cable 3, but phase A of the target cable 3 is connected to phase B of the downstream equipment. Therefore, to further ensure the accuracy of the phase matching results, the cable phase matching system of this application also involves a process of phase matching between the upstream and downstream equipment.
[0061] During this process, the first device 1 can generate phase information reflecting the phase status of the target cable 3 and transmit the phase information to the second device 2.
[0062] The second device 2 can evaluate whether the upper-level device and the lower-level device are phase-matched based on the phase information.
[0063] Specifically, the first device 1 can generate different phase information for different cores of the target cable 3, and each phase information can characterize the phase of the corresponding core.
[0064] As can be seen from the above technical solution, the cable phase matching system provided in this application may include a first device 1 and a second device 2; wherein, the beginning and end of the target cable 3 are marked with phase identifiers; and the upper-level equipment and the lower-level equipment are marked with phase symbols. Based on this, the first device 1, after the target cable 3 is connected to the power grid, acquires images of the head end of the target cable 3 and the upstream equipment to obtain a first image; based on the first image, it determines whether the head end of the target cable 3 and the upstream equipment are phase matched; the second device 2, after the target cable 3 is connected to the power grid, acquires images of the tail end of the target cable 3 and the downstream equipment to obtain a second image; based on the second image, it determines whether the tail end of the target cable 3 and the downstream equipment are phase matched, generates a matching result, and sends it to the first device 1; based on this, this application can utilize the first device 1 and the second device 2, by image acquisition, to directly observe the correspondence between phase markers and phase symbols in the images to complete the phase matching verification between the head end of the target cable 3 and the upstream equipment, as well as the phase matching verification between the tail end of the target cable 3 and the downstream equipment, and promptly detect potential phase problems at the head end; compared with traditional methods that rely on manual communication and manual testing, this method more intuitively obtains the phase information of the cable head end and the upstream equipment, simplifies the judgment logic, improves judgment efficiency, reduces human error, and improves the accuracy of phase matching judgment. Subsequently, when it is determined that the first end of the target cable 3 is phase-matched with the upper-level device and the last end of the target cable 3 is phase-matched with the lower-level device, in order to avoid phase mismatch between the upper-level and lower-level devices, this application also sets up a phase verification process between the upper and lower-level devices. In this process, after determining that the first end of the target cable 3 is phase-matched with the upper-level device and receiving the matching result indicating that the last end of the target cable 3 is phase-matched with the lower-level device, the first device 1 of this application generates phase information reflecting the phase status of the target cable 3 and transmits the phase information to the second device 2; the second device 2 evaluates whether the upper-level device and the lower-level device are phase-matched based on the phase information; based on this, the first device 1 and the second device 2 can determine whether the phase status of the first end of the target cable 3 and the phase status of the last end of the target cable 3 are consistent based on the phase information, and determine whether the phase of the upper-level device and the lower-level device is matched based on this. It can be seen that this application, by means of a three-phase verification process, first realizes the phase verification work between the first end and the last end of the target cable 3, and then completes the phase verification between the upper-level device and the lower-level device connected to the target cable 3. Through this series of operations, the phase matching of the entire link from the upstream equipment, through the target cable 3, to the downstream equipment is fully ensured to be correct; at the same time, the three phase verification processes do not require power outages, thus avoiding any impact on normal household electricity use.
[0065] In some embodiments of this application, the beginning of each core of the target cable 3 is connected to each terminal of the upper-level device; the end of the target cable 3 is connected to each terminal of the lower-level device; the beginning and end of each core of the target cable 3 are marked with the phase identifier of the corresponding phase; each terminal of the upper-level device and the lower-level device is marked with the phase mark of the corresponding phase.
[0066] The first device 1 may further include a first calibration module;
[0067] The second device 2 may also include a second calibration module;
[0068] The first calibration module can determine whether the beginning of the target cable 3 is phase-matched with the upstream device based on the phase mark of the beginning of each wire core in the first image and the phase mark of the connected terminal.
[0069] The second calibration module determines whether the end of the target cable 3 is phase-matched with the downstream device based on the phase mark of the end of each wire core in the second image and the phase mark of the connected terminal.
[0070] Specifically, the first device 1 and the second device 2 may be equipped with cameras to capture the first image and the second image.
[0071] The first image can be one or more images, which may include the phase mark at the beginning of each conductor and the phase mark at each terminal of the upstream device.
[0072] The second image can be one or more images, which may include the phase mark at the end of each conductor and the phase mark at each terminal of the downstream device.
[0073] As can be seen from the above technical solution, this embodiment provides an optional composition of the first device 1 and the second device 2. Through the above method, the first calibration module and the second calibration module can be used to complete the phase detection of the beginning and end of the target cable 3.
[0074] In some embodiments of this application, the phase identifier may be a laser phase identifier; correspondingly, the phase mark may also be a laser phase mark.
[0075] Laser phase markings and laser phase symbols can be engraved using a fiber laser engraving machine to a depth of 0.2mm.
[0076] Cable markings can also be engraved next to the phase markings.
[0077] The first calibration module may include a similarity comparison unit;
[0078] The similarity comparison unit determines the laser phase mark at the beginning of each wire core and the laser phase mark of the terminal connected to each wire core from the first image, and calculates the similarity between the laser phase mark at the beginning of each wire core and the laser phase mark of the terminal connected to it; when the similarity exceeds a preset similarity threshold, it determines that the corresponding wire core and its connected terminal are phase matched; when the similarity does not exceed the preset similarity threshold, it determines that the corresponding wire core and its connected terminal are phase mismatched.
[0079] Specifically, the similarity comparison unit can determine the laser phase mark at the beginning of each wire core and the laser phase mark of the terminal connected to each wire core from the first image in a variety of ways, and calculate the similarity between the laser phase mark at the beginning of each wire core and the laser phase mark of the terminal connected to it.
[0080] For example, the similarity comparison unit can use a scale-invariant feature transformation algorithm to determine the scale-invariant core features of each core laser phase marker and the scale-invariant terminal features of each terminal laser phase mark from the first image, and use a cosine similarity calculation method to calculate the similarity between each scale-invariant core feature and its corresponding scale-invariant terminal feature.
[0081] For example, the similarity comparison unit can use SURF to determine the accelerated robust core features of each core laser phase mark and the accelerated robust terminal features of each terminal laser phase mark from the first image, and use the Euclidean calculation method to calculate the similarity between each accelerated robust core feature and its corresponding accelerated robust terminal feature.
[0082] The similarity threshold can be the average similarity of different laser markings that represent the same phase information.
[0083] Similarly, the second calibration module may include a similarity calculation unit;
[0084] The similarity calculation unit determines the laser phase mark at the end of each wire core and the laser phase mark of the terminal connected to each wire core from the second image, and calculates the similarity between the laser phase mark at the end of each wire core and the laser phase mark of the terminal connected to it; when the similarity exceeds a preset similarity threshold, it determines that the corresponding wire core and its connected terminal are phase matched; when the similarity does not exceed the preset similarity threshold, it determines that the corresponding wire core and its connected terminal are phase mismatched.
[0085] As can be seen from the above technical solution, this embodiment provides an optional composition of the first calibration module. Through the above method, the similarity of the laser phase mark and the laser phase symbol can be calculated by the similarity comparison unit, and the phase matching degree of the wire core and the connected terminal can be quantified, thereby improving the accuracy of this application.
[0086] In some embodiments of this application, the phase identifier can also be a laser QR code mark; correspondingly, the phase mark can also be a laser QR code mark.
[0087] The first calibration module includes a barcode comparison unit;
[0088] The scanning comparison unit scans the laser QR code mark at the beginning of each wire core and the laser QR code mark on the terminal block connected to each wire core in the first image to obtain the phase symbol at the beginning of each wire core and the phase character of the terminal block connected to it, and calculates the similarity between the phase symbol at the beginning of each wire core and its corresponding phase character; when the similarity exceeds a preset similarity threshold, it determines that the corresponding wire core and its terminal block connected to it are phase matched; when the similarity does not exceed the preset similarity threshold, it determines that the corresponding wire core and its terminal block connected to it are phase mismatched.
[0089] Specifically, the scanning comparison unit can use an edge detection algorithm to scan the laser QR code mark at the beginning of each wire core and the laser QR code mark of the terminal connected to each wire core in the first image to obtain the phase symbol at the beginning of each wire core and the phase character of the terminal connected to it; it can use a scale-invariant feature transform algorithm or SURF to calculate the similarity between the phase symbol at the beginning of each wire core and its corresponding phase character; when the similarity exceeds a preset similarity threshold, it is determined that the corresponding wire core and its connected terminal are phase matched; when the similarity does not exceed the preset similarity threshold, it is determined that the corresponding wire core and its connected terminal are phase mismatched.
[0090] Similarly, the second calibration unit may include a barcode matching unit.
[0091] The scanning and matching unit can scan the laser QR code mark at the end of each wire core and the laser QR code mark of the terminal connected to each wire core in the second image to obtain the phase symbol at the end of each wire core and the phase character of the terminal connected to it, and calculate the similarity between the phase symbol at the end of each wire core and its corresponding phase character; when the similarity exceeds a preset similarity threshold, it is determined that the corresponding wire core and its connected terminal are phase matched; when the similarity does not exceed the preset similarity threshold, it is determined that the corresponding wire core and its connected terminal are phase mismatched.
[0092] When the beginning of each wire core is phase-matched with its connected terminal, it can be determined that the beginning of the target cable 3 is phase-matched with the upstream equipment.
[0093] When the end of each wire core is phase-matched with the terminal it is connected to, it can be determined that the end of the target cable 3 is phase-matched with the downstream equipment.
[0094] As can be seen from the above technical solution, this embodiment provides another optional composition of the first calibration module. The phase matching verification can be completed by combining barcode scanning and similarity comparison, thereby improving the applicability of this application.
[0095] In some embodiments of this application, the first device 1 may include an information generation unit.
[0096] The information generation unit generates phase information that uniquely corresponds to the phase of each wire core, and transmits the phase information to the second device 2 through the wire core and wireless communication.
[0097] Specifically, the information generation unit can generate unique phase information corresponding to each wire core based on the phase identifier at the beginning of each wire core, and transmit the phase information of each wire core to the second device 2 through the corresponding wire core and wireless communication.
[0098] As can be seen from the above technical solution, this embodiment provides an optional composition of the first calibration module. In this way, the application can use the information generation unit to generate phase information that matches each wire core one by one, and complete the transmission of phase information through wireless communication and the wire core. This allows the second device 2 to correspond each phase information to each wire core one by one through information reception, thereby corresponding the phase situation represented by each phase information to each wire core one by one, avoiding wire core phase confusion and improving the reliability of subsequent phase matching results.
[0099] In some embodiments of this application, the second device 2 may include a verification unit;
[0100] The verification unit can receive the phase information of each wire core and determine whether the phase judgments of the first device 1 and the second device 2 on the same wire core are consistent based on the phase information of each wire core.
[0101] Specifically, the phase information transmitted by each wire core can characterize the phase of the wire core for the first device 1. Based on this, the verification unit can evaluate whether the beginning and end of the same wire core correspond to the same phase.
[0102] As can be seen from the above technical solution, this embodiment provides an optional composition of the second device 2. Through the above method, the phase judgment of the first device 1 and the second device 2 can be identified by the verification unit, thereby further improving the reliability of this application.
[0103] In some embodiments of this application, the verification unit may include a verification subunit.
[0104] The verification subunit can compare the phase information received through wireless communication with the phase information received through the corresponding wire core. If they are consistent, the phase information of the corresponding wire core is decoded to obtain the target phase of the corresponding wire core. When the target phase of the corresponding wire core is consistent with the phase of the terminal connected to its end, it is determined that the phase judgment of the first device 1 and the second device 2 of the wire core is consistent.
[0105] Specifically, in order to ensure the reliability of the received phase information, the verification subunit can compare the phase information received via wireless communication with the phase information received via the corresponding wire core.
[0106] As can be seen from the above technical solution, this embodiment provides an optional composition of the verification unit, which can further ensure the reliability of phase information.
[0107] In some embodiments of this application, the information generation unit may include a check code generation subunit;
[0108] The check code generation subunit can generate random numbers and sign the phase of each wire core based on the random numbers to obtain signature information. The signature information is then Trellis encoded and modulated to obtain the phase information of the corresponding wire core.
[0109] Specifically, the check code generation subunit can generate random numbers based on timestamps, and use encryption algorithms such as AES-256 to sign the phase of each wire core in combination with the random numbers to obtain signature information. The signature information is then Trellis encoded and modulated to obtain the phase information of the corresponding wire core.
[0110] As can be seen from the above technical solution, this embodiment provides an optional method for information production unit. Through the above method, the carrier noise immunity of phase information can be improved by Trellis coding and modulation.
[0111] To facilitate information exchange between the first device 1 and the second device 2, the cable phase comparison system can also include a passive LoRa repeater 4, such as... Figure 3 As shown.
[0112] The passive LoRa repeater 4 can provide a shielded wireless channel for the first device 1 and the second device 2.
[0113] The first device 1, the second device 2, and the passive LoRa repeater 4 can be powered by lithium batteries.
[0114] The passive LoRa repeater 4 can also extract power through electromagnetic induction via cable, with a power of ≥10mW.
[0115] As can be seen from the above technical solution, this embodiment provides another optional configuration of the cable phase-matching system. In this way, the passive LoRa repeater 4 can be used to provide a wireless channel for the first device 1 and the second device 2, thereby improving the wireless communication efficiency of the first device 1 and the second device 2.
[0116] In some embodiments of this application, the first device 1 may further include an inspection unit;
[0117] The inspection unit can determine whether the voltage, current, frequency and phase difference of the upstream equipment meet the grid connection requirements, and generate a closing command when the grid connection requirements are met.
[0118] Similarly, the second device 2 may also include a verification unit;
[0119] The verification unit can collect data on whether the voltage, current, frequency, and phase difference of the downstream equipment meet the grid connection requirements, and generate a closing command when the grid connection requirements are met.
[0120] Grid connection requirements can be set based on the IEEE 1547 grid connection standard.
[0121] As can be seen from the above technical solution, this embodiment provides another optional composition of the first device 1. Through the above method, after confirming that the phase matching is correct, it is possible to evaluate whether the circuit needs to be closed and complete the final phase matching process.
[0122] Furthermore, a six-axis robotic arm can be designed in addition to the first device 1 and / or the second device 2. The six-axis robotic arm can perform the closing operation after receiving the closing command.
[0123] Among them, a laser positioner can be integrated into the end of the six-axis robotic arm to reduce positioning errors.
[0124] Furthermore, the first device 1, the second device 2, and the passive LoRa repeater 4 may also be equipped with wheels to facilitate their movement.
[0125] Furthermore, the first device 1 and the second device 2 can be connected to an integrated touchscreen to perform phase verification in response to user commands received via the touchscreen.
[0126] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0127] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.
[0128] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. The various embodiments of this application can be combined with each other. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A cable phase matching system, characterized in that, Including the first device and the second device; The first device acquires images of the first end of the target cable and the upstream equipment after the target cable is connected to the power grid, and obtains a first image. Based on the first image, determine whether the beginning of the target cable is phase-matched with the upstream device; The second device acquires images of the end of the target cable and its downstream equipment after the target cable is connected to the power grid, thereby obtaining a second image. Based on the second image, determine whether the end of the target cable is phase-matched with the downstream device, generate a matching result, and send it to the first device; wherein, both the beginning and end of the target cable are marked with phase identifiers; both the upstream device and the downstream device are marked with phase symbols; After determining that the first end of the target cable is phase-matched with the upper-level device and receiving the matching result indicating that the end of the target cable is phase-matched with the lower-level device, the first device generates phase information reflecting the phase status of the target cable and transmits the phase information to the second device. The second device evaluates whether the upper-level device and the lower-level device are phase-matched based on the phase information.
2. The cable phase matching system according to claim 1, characterized in that, The beginning of each core of the target cable is connected to each terminal of the upper-level device; the end of the target cable is connected to each terminal of the lower-level device; the beginning and end of each core of the target cable are marked with the phase identifier of the corresponding phase; each terminal of the upper-level device and the lower-level device is marked with the phase mark of the corresponding phase. The first device further includes a first calibration module; The second device also includes a second calibration module; The first calibration module determines whether the beginning of the target cable is phase-matched with the upstream device based on the phase mark of the beginning of each wire core in the first image and the phase mark of the connected terminal. The second calibration module determines whether the end of the target cable is phase-matched with the downstream device based on the phase identifier of the end of each wire core in the second image and the phase mark of the connected terminal.
3. The cable phase matching system according to claim 2, characterized in that, The phase identifier is a laser phase identifier; the phase mark is a laser phase mark; The first calibration module includes a similarity comparison unit; The similarity comparison unit determines the laser phase mark at the beginning of each wire core and the laser phase mark of the terminal connected to each wire core from the first image, and calculates the similarity between the laser phase mark at the beginning of each wire core and the laser phase mark of the terminal connected to it; when the similarity exceeds a preset similarity threshold, it determines that the corresponding wire core and its connected terminal are phase matched; when the similarity does not exceed the preset similarity threshold, it determines that the corresponding wire core and its connected terminal are phase mismatched.
4. The cable phase matching system according to claim 2, characterized in that, The phase identifier is a laser QR code mark; the phase symbol is a laser QR code symbol; The first calibration module includes a barcode comparison unit; The scanning comparison unit scans the laser QR code mark at the beginning of each wire core and the laser QR code mark on the terminal block connected to each wire core in the first image to obtain the phase symbol at the beginning of each wire core and the phase character of the terminal block connected to it, and calculates the similarity between the phase symbol at the beginning of each wire core and its corresponding phase character; when the similarity exceeds a preset similarity threshold, it determines that the corresponding wire core and its terminal block are phase matched; when the similarity does not exceed the preset similarity threshold, it determines that the corresponding wire core and its terminal block are phase mismatched.
5. The cable phase matching system according to claim 1, characterized in that, The first end of each core of the target cable is connected to each terminal of the upper-level equipment; the end of the target cable is connected to each terminal of the lower-level equipment. The first device includes an information generation unit; The information generation unit generates phase information that uniquely corresponds to the phase of each wire core, and transmits the phase information to the second device through the wire core and wireless communication.
6. The cable phase matching system according to claim 5, characterized in that, The second device includes a verification unit; The verification unit receives the phase information of each wire core and determines whether the phase judgments of the first device and the second device on the same wire core are consistent based on the phase information of each wire core.
7. The cable phase matching system according to claim 6, characterized in that, The verification unit includes a verification subunit; The verification subunit compares the phase information received via wireless communication with the phase information received via the corresponding wire core. If they match, the phase information of the corresponding wire core is decoded to obtain the target phase of the corresponding wire core. When the target phase of the corresponding wire core matches the phase of the terminal connected to its end, it is determined that the phase judgments of the first device and the second device for the wire core are consistent.
8. The cable phase matching system according to claim 5, characterized in that, The information generation unit includes a check code generation subunit; The verification code generation subunit generates random numbers and signs the phase of each wire core based on the random numbers to obtain signature information. The signature information is then Trellis encoded and modulated to obtain the phase information of the corresponding wire core.
9. The cable phase matching system according to any one of claims 5-8, characterized in that, It also includes passive LoRa repeaters; The passive LoRa repeater provides a wireless channel for the first device and the second device.
10. The cable phase matching system according to claim 1, characterized in that, The first device also includes an inspection unit; The inspection unit determines whether the voltage, current, frequency, and phase difference of the upstream equipment meet the grid connection requirements, and generates a closing command when the grid connection requirements are met.