A Control Method and System for Intelligent Cable Voltage Detection, Trial Wiring and Cutting

Abstract

The present invention discloses a method and system for controlling intelligent electrical testing, cable test and cutting of cables. The control system comprises a control host, a cable electrical testing device, a cable test-binding device and a cable cutting device. The control host identifies whether the target cable is energized through the cable electrical testing device, the cable test-binding device receives the test-binding instruction of the control host and performs a safe test-binding on the target cable, and the cable cutting device receives the cutting instruction of the control host and performs a safe cutting on the target cable. The present invention can quickly and simultaneously perform electrical testing on the target cable, and complete the safe test-binding operation and the target cable cutting operation in linkage according to the electrical testing result, thereby realizing the integrated and automated remote control operation of electrical testing, test-binding and cutting of the target cable, improving the accuracy, safety reliability and work efficiency of electrical testing of the cable breaking splicing operation in the cable line relocation project, and greatly reducing the safety risk.

Description

Technical Field

[0001] The present invention relates to the technical field of target cable relocation and emergency repair construction, and particularly relates to a cable intelligent power verification, trial tying and cutting control method and system. Background Art

[0002] At present, cable line relocation or emergency repair operations are all high-risk operations, and a series of safety measures need to be taken to ensure the safety of cable disconnection operations. The safety measures include: identifying the target cable, performing a secondary identification and verification test on the power-off state of the target cable at each cable disconnection position, and then performing a safety trial tie on the target cable that has been correctly identified. Only after no abnormalities are found are the operators allowed to cut the cable at close range. Since the entire set of safety measures involves the cooperation of personnel from multiple specialties, but the traditional cable identification work steps are numerous, complex, time-consuming, troublesome to prepare, and require a large number of personnel. Due to reasons such as construction period, communication, and a fluke mentality, operators often do not fully execute the full set of safety requirements, ultimately leading to safety accidents. The deficiencies of the traditional method are as follows:

[0003] (1) Traditional target cable identification

[0004] It is necessary to apply for the first type of work permit, enter the substation to take safety measures, install the transmitting host, make special wiring on the power-off target cable, and need to leave someone to operate the transmitting host. The receiver needs to synchronize the signal at the transmitting host end before use (when the power is off or the wiring is changed, resynchronization is required), and then the operator can carry the receiver to the target cable cutting position to identify the target cable. There are many preparatory works, the operation is troublesome, it requires the cooperation of multiple people, and it takes a long time. It cannot meet the needs of projects with tight construction period requirements such as emergency repair operations.

[0005] (2) Traditional cable trial tying

[0006] At least two operators need to stand on the insulating pad wearing airtight protective clothing and use a manual sledgehammer to strike a drill rod to penetrate the target cable, or use a manual hydraulic piercing gun for close-range trial tying. The manual operation method has unstable piercing quality, high requirements for the operator's level, and is prone to heatstroke for the operator in summer.

[0007] (3) Traditional cable cutting

[0008] The operator needs to stand on the insulating pad wearing airtight protective clothing and use a reciprocating saw or a ring saw to cut the target cable. It is prone to heatstroke in summer, the operation is troublesome when wearing protective clothing, and the protective clothing is difficult to clean and is easily damaged. When using the traditional cable cutting method, once the target cable is not safely tried and tied and a live cable is accidentally damaged, it is easy to cause serious casualties. Summary of the Invention

[0009] The object of the present invention is to solve the disadvantages existing in the prior art, and a cable intelligent power verification, trial tying and cutting control method and system are proposed.

[0010] To achieve the above object, the present invention adopts the following technical solutions: A cable intelligent power verification, trial tying and cutting control method, the method includes the following steps:

[0011] Step 1: Pre-judge the cable circuit of the on-site laid cable and pre-judge the loop target power-off cable through materials such as the cable layout diagram, cable line information, on-site signboards and the handover information of the operation and maintenance unit. Rapidly detect and confirm the live states of all cables in the cable corridor through three power verification devices, so as to verify the pre-judgment of the target cable circuit and the power-off state, and after verification, the 3 cables pre-judged are the loop target power-off cables of the same target cable circuit; each cable circuit contains 3 cables, and here the cable circuit refers to the power transmission cable circuit of 110 kV and above.

[0012] Step 2: First select one of the loop target power-off cables of the confirmed target cable circuit to install the main power verification device, trial tying device, and cutting device, install auxiliary power verification devices on the two adjacent cables of this cable, and start all of them; due to various complex situations such as the cross-positioning, relocation and change of the on-site cable laying position, and the magnetic field induction interference of adjacent different types of cables, and the attention, reaction speed and processing accuracy of the operator are limited, for safety considerations, only one cable is allowed to be safely trial tied and cut each time, and only one cable can be selected to install the main power verification device on the target cable circuit each time, and the main power verification device is linked and bound with the trial tying device and the cutting device. At the same time, auxiliary power verification devices are installed on the two adjacent cables of this cable to assist in confirming and distinguishing the power-off cable to be cut and the normal live cable, so as to avoid accidentally injuring the normal live cable;

[0013] Step 3: The main power verification device and the auxiliary power verification device collect the magnetic field intensity data of the cables where they are located and send the data to the control host;

[0014] Step 4: The control host receives the magnetic field intensity data sent by the main power verification device and the auxiliary power verification device and displays it on its touch screen. At the same time, it analyzes the data of the main power verification device according to the preset judgment logic, and finally gives the judgment result of the live state of the cable where the main power verification device is located. Only when the judgment result of the main power verification device is the power-off state, the control host sends an execution trial tying instruction to the trial tying device;

[0015] Step 5: After the cable stabbing device receives the stabbing instruction from the control host, it starts the stabbing action of the stab gun through its stabbing control unit. The feedback unit detects the completion status of the stabbing action and feeds back the stabbing action completion result information to the control host through its third central processing module and third wireless receiving module;

[0016] Step 6: The control host receives the stabbing action completion result information sent by the cable stabbing device. Only when the stabbing action completion result information indicates that the stabbing action is completed safely, the control host sends an execution cutting instruction to the cable cutting device;

[0017] Step 7: The cable cutting device receives the execution cutting instruction sent by the control host and starts the cutting action of the cutter through its cutting control unit to cut the cable;

[0018] Step 8: Repeat steps 2 - 7 for the other two target cables of the loop target power-off cable respectively to complete the power verification, stabbing and cutting of the 3 cables of the loop target power-off cable of the target cable loop.

[0019] The present invention also provides a cable intelligent power verification, stabbing and cutting control system, including a control host, a cable power verification device, a cable stabbing device and a cable cutting device; the control host detects and judges the power-off / charged state of the target cable through the cable power verification device, and only when it is determined that the target cable is not charged, issues a stabbing instruction to the cable stabbing device; the cable stabbing device is used to receive the stabbing instruction of the control host, stab the target cable, and if the stabbing is completed, return a completion signal to the control host; the control host issues a cutting instruction to the cable cutting device only after receiving the completion signal of the stabbing device; the cable cutting device is used to receive the cutting instruction of the control host and cut the target cable.

[0020] Preferably, the control host is provided with a first wireless transceiver module, a first central processing module and a touch screen, and the first central processing module is respectively connected to the first wireless transceiver module and the touch screen.

[0021] Preferably, the cable power verification device includes a second central processing module, a second wireless transceiver module and a magnetic field sensor. The second central processing module is connected to the magnetic field sensor. The second central processing module is connected to the wireless transceiver module. The second central processing module processes the data collected by the magnetic field sensor to generate a magnetic field intensity value and sends the magnetic field intensity value to the control host through the second wireless transceiver module.

[0022] Preferably, the cable trial piercing device includes a piercing gun and a piercing gun control device; the piercing gun control device includes a third wireless receiving module, a third central processing module, a piercing gun control unit and a feedback unit, and the third central processing module is respectively connected to the third wireless receiving module and the feedback unit; the piercing gun is respectively connected to the piercing gun control unit and the feedback unit, and the piercing gun control device controls the piercing gun to execute the trial piercing action after receiving the trial piercing instruction from the control host, and the feedback unit feeds back the piercing gun completion signal to the control host.

[0023] Preferably, the cable cutting device includes a cutter and a cutter control device; the cutter control device includes a fourth wireless receiving module, a fourth central processing module and a cutter control unit, and the fourth central processing module is connected to the fourth wireless receiving module; the cutter control device is connected to the cutter, and the cutter control device controls the cutter to perform the cutting action after receiving the cutting instruction from the control host.

[0024] Preferably, the number of the electrical testing devices is three, which can not only accurately test the electrical power of three cables in the same circuit, but also quickly check whether each group of three cables belongs to the same circuit in a multi-circuit environment. If necessary, three electrical testing devices can be placed on the same cable for testing to compare and verify whether the functions of the electrical testing devices are normal and the consistency of the test values ​​of the electrical testing devices.

[0025] Preferably, the electrical testing device includes a main cable electrical testing device and two auxiliary cable electrical testing devices, wherein the main electrical testing device is installed on the target cable (i.e., the single cable to be cut), and the two auxiliary cable electrical testing devices are respectively installed on two auxiliary electrical testing cables closest to the target cable, and the main cable testing device and the two auxiliary cable electrical testing devices are respectively connected to the control host by wireless communication.

[0026] The present invention has the following beneficial effects:

[0027] 1. The present invention can realize rapid detection of the target cable and the auxiliary cable at the same time, judge the cable electrical test results to jointly complete the target cable safety test connection operation and cable disconnection operation, and realize the intelligent and integrated judgment operation of cable relocation electrical test, test connection and disconnection.

[0028] 2. The entire operation process of the present invention is linked and integrated. The operation and execution results of the previous process of cable electrical testing, test tying and disconnection are the basis for judging the start of the subsequent process. The subsequent process cannot be started before the previous process is completed and feedback information that meets the safety standards is received. This operation mode effectively improves the accuracy of the target cable electrical testing, test tying and disconnection operations, and avoids the situation where the electrical testing, test tying and disconnection operations are not performed on the same cable.

[0029] 3. In the present invention, by applying wireless communication technology, a control system can remotely control an electric test device, a cable tying device, and a cable cutting device at a long distance simultaneously. The operator can complete high-risk operations such as cable tying and cable cutting without approaching or directly contacting the cable, greatly improving the safety factor when the operator makes misjudgments, gets injured, or damages the target cable.

[0030] 4. In the present invention, the entire system operation adopts a visual graphic touch interface and voice reminder. The operation is simple and convenient. Even a single operator can obtain sufficient information reminders and timely discover unsafe situations.

[0031] 5. In the present invention, the electric test device using electromagnetic field induction technology can quickly complete cable electric test detection at any cable cutting location without going through a series of cumbersome procedures such as applying for a work permit, entering the substation to take safety measures, making special wiring, and synchronizing signals, greatly saving operation time.

[0032] 6. In the present invention, one control host is equipped with two main electric test devices and three auxiliary electric test devices. The main electric test devices are installed on the target cable, and the auxiliary electric test devices are respectively installed on other cables in the same circuit. It can simultaneously judge the power-off / charged states of 3 cables, greatly improving the electric test efficiency. At the same time, by comparing and analyzing the magnetic field intensities of the target cable and adjacent cables, the accuracy of the electric test judgment of the target cable can be improved. When the three electric test devices are placed on the same cable for detection, the auxiliary electric test devices can be used to compare and detect the main electric test device. By comparing whether the magnetic field intensity values detected by the main electric test device and the auxiliary electric test device for the same cable are basically the same, it can be timely found whether there is an abnormality in the electric test device.

[0033] 7. Since the operator does not need to contact or approach the live cable for high-risk operations such as cable tying and cable cutting, there is no need to wear high-voltage protective clothing and stand on an insulating mat for operation, greatly reducing the probability of heat stroke in hot weather and reducing the labor intensity of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 : Block diagram of the control host provided by the present invention;

[0035] Figure 2 : Block diagram of the cable electric test device provided by the present invention;;

[0036] Figure 3 : Block diagram of the cable tying device provided by the present invention;

[0037] Figure 4 : Block diagram of the cable cutting device provided by the present invention;

[0038] Figure 5 : Schematic installation diagram of the system provided by the present invention

[0039] Figure 6 : Circuit diagram of the feedback unit of the cable trial tying device provided by the present invention;

[0040] Figure 7 : Appearance diagram of the control host provided by the present invention;

[0041] Figure 8 : Appearance diagram of the cable power verification device provided by the present invention;

[0042] Figure 9 : Flowchart of a cable intelligent power verification, trial tying and cutting control method provided by the present invention;

[0043] Legend: Control host 1, first housing 11, touch screen 111, auxiliary power verification cable (A; C), target cable B, main cable power verification device 22, auxiliary cable power verification devices (21; 23), second housing 201, clamping block 202, cable trial tying device 3, cable cutting device 4. Detailed implementation manners

[0044] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0045] Refer to Figures 1-9 , an embodiment provided by the present invention: A cable intelligent power verification, trial tying and cutting control system includes a control host, three cable power verification devices, a cable trial tying device and a cable cutting device. The control host performs data interaction with the cable power verification devices, the cable trial tying device and the cable cutting device in a wireless communication manner.

[0046] Among them, the three cable power verification devices can not only accurately verify the power of 3 cables in the same circuit, but also quickly recheck whether each group of 3 cables belongs to the same circuit in a multi-circuit environment. In the same circuit, among the three cable power verification devices, one of them is the main power verification device installed on the target cable to be cut, and the other two are auxiliary cable devices installed on the auxiliary power verification cables. The auxiliary power verification cables are the cables closest to the target cable. The cable cutting device and the cable trial tying device are both installed on the target cable. The cable power verification device is used to collect the magnetic field intensity data of the installed cable. The control host determines whether the target cable is energized according to the magnetic field intensity data collected from the cable power verification device installed on the target cable. When the control host determines that the target cable is de-energized, a trial tying instruction is sent to the cable trial tying device. The cable trial tying device receives the trial tying instruction from the control host and performs trial tying on the target cable; after the control host obtains the confirmation from the cable trial tying device that the trial tying action has been completed safely, a cutting instruction is sent to the cable cutting device.

[0047] In this embodiment, preferably, the control host is provided with a first wireless transceiver module, a first central processing module, and a touch screen. The first central processing module is respectively connected to the first wireless transceiver module and the touch screen. The control host is provided with control management software. The first central processing module is provided with an STM32G031K8T6 central processing unit chip. The control host includes a first housing, a first control board, and a touch screen. The touch screen is embedded in the first housing. The first control board is disposed in the first housing. The touch screen is connected to the first control board. The first control board is provided with a first wireless transceiver module and a first central processing module.

[0048] In this embodiment, preferably, each cable voltage detector includes a second central processing module, a second wireless transceiver module, and a magnetic field sensor. The second central processing module is connected to the magnetic field sensor. The second central processing module is connected to the wireless transceiver module. The second central processing module processes the data collected by the magnetic field sensor to generate a magnetic field intensity value, and sends it to the control host through the second wireless transceiver module. Each cable voltage detector includes a second housing, a second control board, and a clamping block. The left and right sides of the second housing are respectively connected to two clamping blocks for clamping the cable. A compression spring is provided between the clamping block and the second housing to enable the clamping block to move outward and inward. The second control board is provided with a second central processing module, a second wireless transceiver module, and a magnetic field sensor.

[0049] Among them, the second wireless transceiver module uses an NRF24L01 chip. The second central processing module is provided with an STM32G031G8U6 central processing unit chip. The data collected by the magnetic field sensor is converted into magnetic field intensity value data through the second central processing module including the central processing unit chip. It adopts the Tesla magnetic induction principle. The cable generates an alternating magnetic field under the power frequency of 50HZ. The magnetic field sensor induces an alternating electric field on the alternating magnetic field. The alternating electric field signal is converted into a DC signal through an LTC1966 true RMS chip, and then amplified by an operational amplifier until the small DC signal is amplified to a signal size that can be recognized by the central processing unit chip. Finally, the magnetic field intensity value data sensed at present is obtained through analog-to-digital conversion, and then the magnetic field intensity value data is transmitted to the first wireless receiving module of the control host through the second wireless transceiver module. The first wireless receiving module transmits the received magnetic field intensity value to the first central processing module.

[0050] The control management software on the control host is provided with a preset judgment logic. By presetting the electromagnetic field strength standard of the target cable, the magnetic field strength data collected from the target cable is compared with the preset electromagnetic field strength standard, so as to judge whether the target cable is in a power-off state or a live state. The electromagnetic field strength standard is preset as 20. When the magnetic field strength data is ≥20, the target cable is judged to be live. When the magnetic field strength data is <20, the target cable is judged to be power-off. The magnetic field strength data and live state of the target cable are displayed on the touch screen. The magnetic field strength data collected from the auxiliary power test cable is directly displayed on the touch screen through the control management software. Due to the electromagnetic interference of adjacent cables during the detection process, if the power test result of the device of the present invention is different from the cable identification result or the briefing result of the operation and maintenance personnel, the operation should be suspended to check whether the instrument is normal and whether the installation is normal. After confirmation, continue the operation.

[0051] In this embodiment, as a preference, the cable test piercing device includes a piercing gun and a piercing gun control device; the piercing gun control device includes a third wireless receiving module, a third central processing module, a test piercing control unit and a feedback unit, the third central processing module is connected to the third wireless receiving module, the feedback unit and the test piercing control unit respectively; the piercing gun is connected to the test piercing control unit and the feedback unit respectively, after the third central processing module of the piercing gun control device receives the test piercing instruction sent by the control host, the test piercing control unit starts the test piercing action on the piercing gun, and the feedback unit feeds back the test piercing action completion signal of the piercing gun to the control host, the feedback unit is a differential amplifier circuit composed of a detection resistor and an operational amplifier, when the test piercing action is normal, the feedback unit will send a low level pulse to the third central processing module, when the third central processing module detects this low level pulse, it will send the test piercing action completion signal to the control host through the third wireless receiving module, wherein the third central processing module is provided with an STM32G031K6T6 central processor chip. The piercing gun control device includes a third housing and a third control board provided in the third housing, and the third control board is provided with a third wireless receiving module, a third central processing module, a test piercing control unit and a feedback unit.

[0052] In this embodiment, as a preference, the cable cutting device includes a cutter and a cutter control device, the cutter control device includes a fourth wireless receiving module, a fourth central processing module and a cutter control unit, the fourth central processing module is connected to the fourth wireless receiving module and the cutter control unit respectively, the cutter control unit is connected to the cutter, the cutter control unit receives instructions from the fourth central processing module and controls the cutting action of the cutter, wherein the fourth wireless receiving module is provided with an STM32G031G8U6 central processing unit chip. The cutter control device includes a fourth housing and a fourth control board provided in the fourth housing, the fourth control board is provided with a fourth wireless receiving module, a fourth central processing module and a cutter control unit.

[0053] The control unit is an electronic switch controlled by a central processing unit. When an action signal is received, the central processing unit controls the closing of the electronic switch, and the lance / cutter starts to act. Otherwise, the central processing unit controls the opening of the electronic switch, and the lance / cutter does not act.

[0054] The present invention also provides a method for intelligent cable power verification, trial wiring and cutting control. The method includes the following steps:

[0055] A method for intelligent cable power verification, trial wiring and cutting control. The method includes the following steps:

[0056] Step 1: Based on materials such as the cable layout diagram, cable line information, on-site identification signs, and handover information from the operation and maintenance unit, pre-judge the cable circuits of the cables laid on-site and pre-judge the target power-off cables of the circuit. Use three power verification devices to quickly detect and confirm the energized states of all cables in the cable corridor, thereby verifying the pre-judgment of the target cable circuit and the power-off state. After verification, the 3 pre-judged cables are the target power-off cables of the same target cable circuit; among them, the target power-off cables of the circuit include 3 cables, and the cable circuit here refers to a power transmission cable circuit of 110 kV and above.

[0057] Step 2: Select one of the target power-off cables of the confirmed target cable circuit to install the main power verification device, trial wiring device, and cutting device, and install auxiliary power verification devices on the two adjacent cables of this cable, and start all of them;

[0058] Step 3: The main power verification device and the auxiliary power verification device collect the magnetic field intensity data of the cables where they are located and send the data to the control host;

[0059] Step 4: The control host receives the magnetic field intensity data sent by the main and auxiliary live-checking devices and displays it on its touch screen. At the same time, it analyzes the data of the main live-checking device according to the preset judgment logic, and finally gives the judgment result of the live state of the cable where the main live-checking device is located. Only when the judgment result of the main live-checking device is in the power-off state, the control host sends an execution stabbing instruction to the stabbing device; among them, there are two ways for the control host to send an execution stabbing instruction to the stabbing device, one is the manual method and the other is the automatic method. For the manual method, a "Stabbing Execution" touch button is provided on the touch screen of the control host. The control host needs to send an execution stabbing instruction to the stabbing device by manually clicking the "Stabbing Execution" touch button on the touch screen. At this time, the operator rechecks according to the magnetic field intensity data of the three live-checking devices and the relevant cable layout information, handover information, and line information to ensure safety; for the automatic method, the control management software of the control host automatically sends an execution stabbing instruction to the stabbing device only when it judges that the target cable is in the power-off state.

[0060] Step 5: After receiving the stabbing instruction from the control host, the cable stabbing device starts the stabbing action of the stabbing gun through its stabbing control unit. The feedback unit detects the completion status of the stabbing action and sends the stabbing action completion result information to the control host through its third central processing module and third wireless receiving module.

[0061] Step 6: The control host receives the stabbing action completion result information sent by the cable stabbing device. Only when the stabbing action completion result information indicates that the stabbing action is safely completed, the control host sends an execution cutting instruction to the cable cutting device to ensure the safety of cable cutting. Among them, there are two ways for the control host to send an execution cutting instruction to the cutting device, one is the manual method and the other is the automatic method. For the manual method, a "Cutting Execution" touch button is provided on the touch screen of the control host. The control host needs to send an execution cutting instruction to the cutting device by manually clicking the "Cutting Execution" touch button on the touch screen; for the automatic method, the control management software of the control host automatically sends an execution stabbing instruction to the cutting device only when the feedback stabbing action completion result information indicates that the stabbing action is safely completed.

[0062] Due to the complex situations such as cross-transposition, migration and change of cable laying positions on site, magnetic field induction interference of adjacent cables of different types, and the limited attention, reaction speed and processing accuracy of operators, only one cable is allowed to be tested and cut off at a time for safety reasons. Only one phase of the target cable loop can be selected to install the main power test device at a time, and the main power test device is linked and bound with the test device and the cutting device. At the same time, auxiliary power test devices are installed on the two cables adjacent to the target cable to assist in confirming and distinguishing the target power-off cable and the non-target live cable in the loop, so as to avoid accidental damage to the non-target live cable.

[0063] Step 7: The cable cutting device receives the cutting execution instruction sent by the control host, and starts the cutting action of the cutter through its cutting control unit to cut off the target cable;

[0064] Step 8: Repeat steps 2-7 for the other two target cables of the target power-off cable in the loop to complete the electrical testing, test tying and cutting of the three cables of the target power-off cable in the loop of the target cable loop.

[0065] Among them, step 1 is to generally pre-judge and group the cable loops and target power-off cables of the on-site cables through the cable layout, cable line information, on-site identification signs and information handed over by the operation and maintenance unit, and then perform electrical testing by installing three electrical testing devices in turn on different cables in the cable corridor.

[0066] Assuming that the on-site laying situation is that three circuits of 110kV and above cables are laid in the same trench, three electrical testing devices are placed on the three pre-judged cable circuits for testing. Only three tests are required to complete the electrical testing and review of the three circuits of 9-phase cables on site, and quickly provide data to complete the confirmation of the power outage cable circuit and the specific power outage cable. The test data and test results provided by the three electrical testing devices can be used to review and confirm the previous power outage cable pre-judgment results and cable layout information, handover information, line information, etc. The judgment logic is as follows: (1) Before the cable electrical testing, the cable circuit is generally pre-judged based on the cable placement position. For example, if there are 9 cables in the target cable trench, the 3 cables on the left are generally pre-judged as cable circuit 1, the 3 cables in the middle are cable circuit 2, and the 3 cables on the right are cable circuit 3.

[0067] (2) If the magnetic field strength data of the cables of the three electrical test devices tested this time are basically the same, then the three cables tested this time are judged to be of the same circuit; if the magnetic field strength data of the cables of the three electrical test devices tested this time are basically the same, and the detection values ​​are less than the preset power-off electromagnetic field strength standard, then the three cables tested this time are judged to be power-off cables of the same circuit; if the detection values ​​are all greater than the preset live standards, then the three cables tested this time are judged to be live cables of the same circuit.

[0068] (3) If the difference in the measured values of the power-on test is large, it is very likely that the preliminary judgment of the cable circuit is incorrect, and the three cables tested this time are not cables of the same circuit; if the difference in the measured values of the three cables during the power-on test is large, and there are situations where the measured value is greater than the live standard and the static magnetic field intensity standard at the same time, it is judged that the three cables tested this time are very likely from different live cable and de-energized cable circuits. At this time, the cable circuit should be re-grouped according to the power-on test data, and the cables with similar data should be grouped for the second preliminary judgment of the cable circuit, and then the power-on test should be repeated according to the group.

[0069] (4) If the power-on test result of the cable circuit in the second preliminary judgment is a de-energized cable of the same circuit and is basically consistent with information such as the construction record, layout diagram, on-site disclosure, and real-time current-carrying, etc., then subsequent cable safety tying and cutting operations can be carried out on the cables of this circuit; if the power-on test result of the cable circuit in the second preliminary judgment is a live cable of the same circuit or the power-on test results are not of the same circuit, and there are both de-energized cables and live cables at the same time, it is necessary to manually analyze the abnormal situation in detail to rule out detection instrument failures or incorrect manual operation methods. The method of ruling out machine failures includes placing the three power-on test devices on the same cable (live or de-energized state) for detection at the same time. If the measured values are consistent and reasonable, the machine is normal, otherwise it is abnormal.

[0070] (5) If the manual review method includes that when the detection results are inconsistent with information such as the construction record, layout diagram, on-site disclosure, and real-time current-carrying, etc. compared with the power-on test results, the normality of the detection instrument should be checked. If the machine is normal, manual cross-verification analysis should be carried out on the cable circuit and the live / de-energized state using different power-on test principles.

[0071] Through the three power-on test devices provided by the present invention, firstly, it can provide the magnetic field intensity data of three cables to assist manual rapid completion of the power-on test of the cables, so as to quickly judge the live / de-energized cable circuit. Secondly, the three power-on test devices provided by the present invention can simultaneously provide the power-on test results and the magnetic field intensity data of three cables to assist manual re-verification and confirmation of the preliminary judgment results of the cable circuit. Thirdly, it is convenient to keep one-phase reference comparison cable unchanged and convenient to replace the power-on test device on the target detection cable, thereby improving the detection efficiency and facilitating comparative analysis. Fourthly, the three power-on test devices provided by the present invention can complete the above-mentioned power-on test and analysis work quickly in any place without prior safety arrangement, special wiring and external power supply.

[0072] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for intelligent cable voltage detection, trial wiring and cutting control, the method comprising the following steps: Step 1: First, pre-judge the cable circuit of the on-site laid cable and pre-judge the target power-off cable of the circuit; then, quickly detect and confirm the cable circuit and live state of all cables in the cable corridor through three voltage detection devices, so as to verify the pre-judgment of the target cable circuit and power-off state. After verification, the 3 pre-judged cables are the target power-off cables of the same target cable circuit; Step 2: First select one of the target power-off cables of the confirmed target cable circuit to install the main voltage detection device, trial wiring device, and cutting device, and install auxiliary voltage detection devices on the two adjacent cables of this cable, and start all of them; Step 3: The main voltage detection device and the auxiliary voltage detection device collect the magnetic field intensity data of the cables where they are located and send the data to the control host; Step 4: The control host receives the magnetic field intensity data sent by the main voltage detection device and the auxiliary voltage detection device, analyzes the data of the main voltage detection device according to the preset judgment logic, and finally gives the judgment result of the live state of the cable where the main voltage detection device is located. Only when the judgment result of the main voltage detection device is the power-off state, the control host sends an execution trial wiring instruction to the trial wiring device; Step 5: After the cable trial wiring device receives the trial wiring instruction from the control host, it starts the trial wiring action of the lance through its trial wiring control unit. The feedback unit detects the completion state of the trial wiring action and sends the trial wiring action completion result information to the control host through its third central processing module and third wireless receiving module; Step 6: The control host receives the trial wiring action completion result information sent by the cable trial wiring device. Only when the trial wiring action completion result information is that the trial wiring action is completed safely, the control host sends an execution cutting instruction to the cable cutting device; Step 7: The cable cutting device receives the execution cutting instruction sent by the control host and starts the cutting action of the cutter through its cutting control unit to cut the cable; Step 8: Repeat Steps 2-7 for the other two cables of the target power-off cables of the circuit target to complete the voltage detection, trial wiring and cutting of all 3 cables of the target power-off cables of the target cable circuit.

2. A cable intelligent power verification, test tying and cutting control system, characterized in that: Including a control host, a cable voltage detection device, a cable trial wiring device, and a cable cutting device; the control host detects and judges the power-off / live state of the target cable through the cable voltage detection device, and only when it is determined that the target cable is not live, it issues a trial wiring instruction to the cable trial wiring device; the cable trial wiring device is used to receive the trial wiring instruction from the control host, conduct trial wiring on the target cable, and if the trial wiring is completed, return a completion signal to the control host; The control host issues a cutting instruction to the cable cutting device only after receiving the completion signal from the trial wiring device; the cable cutting device is used to receive the cutting instruction from the control host and cut the target cable.

3. The intelligent cable voltage detection, trial wiring and cutting control system according to claim 2, characterized in that: The control host is provided with a first wireless transceiver module, a first central processing module, and a touch screen, and the first central processing module is respectively connected to the first wireless transceiver module and the touch screen.

4. An intelligent cable voltage detection, trial tying and cutting control system according to claim 2, characterized in that: The cable voltage detection device includes a second central processing module, a second wireless transceiver module, and a magnetic field sensor. The second central processing module is connected to the magnetic field sensor, and the second central processing module is connected to the wireless transceiver module. The second central processing module processes the data collected by the magnetic field sensor to generate a magnetic field intensity value, and sends the magnetic field intensity value to the control host through the second wireless transceiver module.

5. The intelligent cable voltage detection, trial wiring and cutting control system according to claim 2, characterized in that: The cable stabbing device includes a stabbing gun and a stabbing gun control device; the stabbing gun control device includes a third wireless receiving module, a third central processing module, a stabbing gun control unit, and a feedback unit. The third central processing module is respectively connected to the third wireless receiving module and the feedback unit; the stabbing gun is respectively connected to the stabbing gun control unit and the feedback unit. After receiving the stabbing instruction from the control host, the stabbing gun control device controls the stabbing gun to perform the stabbing action, and the feedback unit feeds back the stabbing completion signal to the control host.

6. A cable intelligent power verification, trial wiring and cutting control system according to claim 2, characterized in that: The cable cutting device includes a cutter and a cutter control device; the cutter control device includes a fourth wireless receiving module, a fourth central processing module, and a cutter control unit. The fourth central processing module is connected to the fourth wireless receiving module; the cutter control device is connected to the cutter. After receiving the cutting instruction from the control host, the cutter control device controls the cutter to perform the cutting action.

7. A cable intelligent voltage detection, trial tying and cutting control system according to claim 2, characterized in that: The number of the voltage detection devices is three.

8. An intelligent cable power verification, trial wiring and cutting control system according to claim 7, characterized in that: The voltage detection device includes one main cable voltage detection device and two auxiliary cable voltage detection devices. The main cable voltage detection device is installed on the target cable, and the two auxiliary cable voltage detection devices are respectively installed on the two auxiliary detection cables closest to the target cable. The main cable voltage detection device and the two auxiliary cable voltage detection devices are respectively connected to the control host in a wireless communication manner.

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