Intelligent hook for mining power transmission cable and intelligent hook group comprising same

Abstract

The invention relates to an intelligent hook for a mining power transmission cable and an intelligent hook group comprising the same. The intelligent hook comprises an extension rod, an arc-shaped hook part and a sensing circular ring, the arc-shaped hook part is connected to the bottom end of the extension rod, the sensing circular ring comprises a first sensing semicircular ring, the outer surface of the first sensing semicircular ring is connected to the inner wall of the arc-shaped hook part, and the first sensing semicircular ring is provided with a cable information acquisition device. The cable information acquisition device is used for acquiring cable information. The mining power transmission line fault monitoring hook and the sensing system are embedded into a cable hook, so that multiple purposes are achieved, the cable installation workload is reduced, the efficiency is improved, sensing signals are rich, multi-point information sensing is achieved, and all-directional cable fault monitoring is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of mining monitoring equipment; in particular, the present invention relates to an intelligent hook for mining power transmission cables and an intelligent hook group comprising the same. Background Art

[0002] With the continuous development and innovation of Internet of Things technology, new sensor technologies and materials are also emerging, providing a guarantee for improving the reliability of power transmission line sensor devices. For example, sensors made of new nanomaterials have higher sensitivity and stability; remote monitoring and diagnosis technology based on the Internet of Things can realize real-time monitoring and maintenance of power transmission line sensor devices.

[0003] However, existing sensing and monitoring systems are all developed based on ground high-voltage transmission lines, and the research and development of intelligent monitoring technology and products for high-voltage transmission lines in coal mines is lagging behind. In particular, there is no mature and reliable product for the monitoring and positioning technology of damage, leakage, breakage, short circuit and other faults in coal mine power supply lines. At present, the demand for long-distance power supply in coal mines is growing, and there is an urgent need for a monitoring system that can realize the above functions. Summary of the invention

[0004] In view of this, the present invention provides an intelligent hook for a mining power transmission cable and an intelligent hook group including the same, thereby solving or at least alleviating one or more of the above-mentioned problems and other problems existing in the prior art.

[0005] In order to achieve the aforementioned objectives, the present invention provides an intelligent hook for mining power transmission cables, wherein the intelligent hook comprises an extension rod, an arc-shaped hook portion and a sensing ring, the arc-shaped hook portion is connected to the bottom end of the extension rod, the sensing ring comprises a first sensing semicircular ring, the outer surface of the first sensing semicircular ring is connected to the inner wall of the arc-shaped hook portion, the first sensing semicircular ring is provided with a cable information acquisition device, and the cable information acquisition device is used to acquire cable information.

[0006] In the smart hook as described above, optionally, the sensing ring also includes a second sensing semicircular ring, the first end of the second sensing semicircular ring is rotatably connected to the end of the arc-shaped hook portion via a rotating shaft, the second end of the second sensing semicircular ring is used to connect to the first sensing semicircular ring, the sensing ring is used to tighten and monitor the cable, and the second sensing semicircular ring is provided with a cable information acquisition device, and the cable information acquisition device is used to acquire cable information.

[0007] In the smart hook as described above, optionally, the sensing ring has an inner ring wall, an outer ring wall and a side wall, the cable information acquisition device is distributed on the inner ring wall, the cable information acquisition device is embedded in the inner ring wall and protrudes from the surface of the inner ring wall, the cable information acquisition device includes at least one temperature sensor, at least one pressure sensor, and at least one leakage current sensor, the cable information includes the temperature value of the outer wall of the cable, the pressure of the cable on the inner ring wall and the leakage current value of the outer wall of the cable, the side wall includes a first side wall and a second side wall, the first side wall is provided with a signal transmitter adjacent to the inner ring wall, and the second side wall is provided with a signal receiver adjacent to the inner ring wall.

[0008] In the smart hook as described above, optionally, a smart hook circuit is arranged inside the smart hook, and the smart hook circuit includes a sensor circuit, and the sensor circuit is connected to the cable information acquisition device, the signal transmitter and the signal receiver, and the sensor circuit is used to transmit the cable information.

[0009] In the smart hook as described above, optionally, the first end of the first sensing semicircular ring is provided with a protrusion, the first end of the second sensing semicircular ring is provided with a groove adapted to the protrusion, the second end of the second sensing semicircular ring is provided with a male and female socket, and the smart hook circuit of the first sensing semicircular ring is used to connect the smart hook circuit of the second sensing semicircular ring through the male and female socket.

[0010] In the smart hook as described above, optionally, a terminal block is provided at the top end of the extension rod, and the circuit line of the smart hook circuit protrudes from the bottom end of the extension rod and is adapted to the terminal block.

[0011] In the smart hook as described above, optionally, a mounting groove is provided at the top end of the extension rod, a raised cylinder is provided at the bottom end of the extension rod, a circuit line connector terminal array is provided on the outer circular surface of the raised cylinder, an installation circuit line is provided in the mounting groove, the circuit line connector terminal array is adapted to the installation circuit line, and the raised cylinder is adapted to the mounting groove.

[0012] In the smart hook as described above, optionally, the smart hook includes a first-level smart hook and a subsequent-level smart hook, and the top end of the extension rod of the first-level smart hook is provided with a mounting protrusion and a female terminal block, and the mounting protrusion is used to fix the first-level smart hook in a coal mine.

[0013] In order to achieve the aforementioned objectives, the second aspect of the present invention provides a smart hook group, wherein the smart hook group includes the smart hook as described in the aforementioned first aspect, and the smart hook group includes the first-level smart hook and the second-level smart hook.

[0014] In the smart hook group as described above, optionally, the smart hook group includes N levels of smart hooks connected in sequence from top to bottom, the first-level smart hook is located at the first level, and the raised cylinder of the Mth level smart hook in the smart hook group is installed in the installation groove of the M-1th level smart hook, M is an integer, M is greater than or equal to 2 and M is less than or equal to N.

[0015] The mining transmission line fault monitoring hook and sensing system of the present invention are embedded in the cable hook, achieving multi-purpose use, reducing the workload of cable installation, improving efficiency, having rich sensing signals, multi-point information perception, and realizing all-round cable fault monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The disclosure of the present invention will become more apparent with reference to the accompanying drawings. It should be understood that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the drawings: Figure 1 A schematic block diagram of an embodiment of a mining power transmission cable fault monitoring system of the present invention; Figure 2 It is a structural schematic diagram of an embodiment of the smart hook of the present invention; Figure 3 It is a structural schematic diagram of an embodiment of a connection method of a smart hook in a smart hook group of the present invention; Figure 4 A schematic diagram of an embodiment of the intelligent hook monitoring cable of the present invention; Figure 5 is a schematic diagram of an embodiment of an energy harvesting system of the present invention; Figure 6 It is a structural schematic diagram of an embodiment of the intelligent hook circuit of the present invention; Figure 7 This is a schematic diagram of the distribution of the smart hooks of the present invention; Figure 8 A schematic diagram of a circuit module used in the monitoring system of the present invention; Fig. 9 It is a schematic diagram of the principle of the signal transmitter 7 and the signal receiver detection cable of the smart hook of the present invention; Fig.10 A schematic diagram of an embodiment of a side wall of a sensing circle of the minimum detection area of ​​the present invention in the first case; Fig.11A schematic diagram of an embodiment of a side wall of a sensing ring of the minimum detection area of ​​the present invention in the second case and the fourth case; Fig.12 It is a schematic diagram of an embodiment of a side wall of the sensing circle of the minimum detection area, the upper minimum detection area and the lower minimum detection area of ​​the present invention in the fifth case.

[0017] Figure numerals: 1-extension rod; 2-arc-shaped hook; 3-first sensing semicircular ring; 4-second sensing semicircular ring; 5-cable information acquisition device; 6-first side wall; 7-signal transmitter; 8-terminal block; 9-installation groove; 10-installation protrusion; 11-protruding cylinder. DETAILED DESCRIPTION

[0018] With reference to the accompanying drawings and specific embodiments, the structure, composition, characteristics and advantages of an intelligent hook for a mining power transmission cable and an intelligent hook group including the same of the present invention will be described below in an exemplary manner. However, all descriptions should not be used to form any limitation on the present invention.

[0019] In addition, for any single technical feature described or implied in the embodiments mentioned in this document, or any single technical feature displayed or implied in the accompanying drawings, the present invention still allows for continued arbitrary combination or deletion between these technical features (or their equivalents) without any technical obstacles, and thus it should be considered that these more embodiments according to the present invention are also within the scope of the description of this document.

[0020] It should also be noted that the orientation or positional relationship indicated by the terms "inside" and "outside" is based on the orientation or positional relationship of the smart hook shown in the accompanying drawings, and is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0021] In addition, the terms first and second are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as first and second may explicitly or implicitly include at least one of the features.

[0022] Figure 1 A schematic block diagram of an embodiment of a mining power transmission cable fault monitoring system of the present invention, Figure 1It can be seen that the monitoring system includes a monitoring host, a single-chip microcomputer and an intelligent hook group. In this embodiment, the monitoring host is located on the ground, and is connected to multiple single-chip microcomputers through detection optical fibers. Each single-chip microcomputer is connected to multiple intelligent hook groups. Each intelligent hook group is provided with multiple levels of intelligent hooks connected in an up-and-down manner. The intelligent hooks monitor the information of the transmission cable and transmit the information to the single-chip microcomputer and finally to the host.

[0023] Specifically, the monitoring system may include an intelligent hook group, a single-chip microcomputer and a monitoring host. The intelligent hook group includes at least one level of intelligent hooks. The intelligent hooks include a sensing ring. The sensing ring is provided with a cable information acquisition device. The cable information acquisition device is used to detect and transmit cable information. The single-chip microcomputer has at least one hardware node. The hardware node is used to connect the intelligent hook group. The single-chip microcomputer is connected to at least one intelligent hook group. The single-chip microcomputer is used for A / D conversion and transmission of cable information, and the address of the intelligent hook is determined through the hardware node. The monitoring host is used to connect to at least one single-chip microcomputer. The monitoring host is used to extract abnormal data from the cable information, and determine the single-chip microcomputer that transmits the abnormal data through the IP address of the single-chip microcomputer.

[0024] In an optional embodiment, in order to facilitate data collection and wiring, the above three-level pyramid model can be expanded, and several analog and digital data acquisition modules with AD / DA conversion functions can be added between the intelligent hook group and the single-chip system, and the multi-channel data can be integrated and converted into 485 communication to access the single-chip system, which will greatly reduce the wiring distance for data transmission. In this way, each single-chip will be assigned a unique IP address in the local area network, and the host will distinguish and locate the single-chip through this IP address, and then locate the intelligent hook for data transmission through the channel sequence of each single-chip data access.

[0025] Figure 2 FIG. 1 is a schematic diagram of the structure of an embodiment of the intelligent hook of the present invention. The intelligent hook of this embodiment is located in a coal mine. Figure 2 It can be seen that the smart hook may include an extension rod 1, an arc-shaped hook portion 2 and a sensing ring. The arc-shaped hook portion 2 is connected to the bottom end of the extension rod 1, and the sensing ring includes a first sensing semicircular ring 3 and a second sensing semicircular ring 4. The outer surface of the first sensing semicircular ring 3 is connected to the inner wall of the arc-shaped hook portion 2, and the first sensing semicircular ring 3 and the second sensing semicircular ring 4 are provided with a cable information acquisition device 5, and the cable information acquisition device 5 is used to acquire cable information. The first end of the second sensing semicircular ring 4 is rotatably connected to the end of the arc-shaped hook portion 2 through a rotating shaft, and the second end of the second sensing semicircular ring 4 is used to connect to the first sensing semicircular ring 3. The sensing ring is used to tighten and monitor the cable.

[0026] Specifically, the sensing ring has an inner ring wall, an outer ring wall and a side wall. In this embodiment, the cable information acquisition device 5 can be a plurality of temperature sensors, a plurality of pressure sensors and a plurality of leakage current sensors, which are distributed on the inner ring wall, embedded in the inner ring wall and protruding from the surface of the inner ring wall, thereby avoiding interference between sensors and effectively monitoring the cable in real time without occupying too much cable space.

[0027] For example, when the cable surface is damaged, the outer wall of the cable may be dented, and the protruding pressure sensor cannot contact the outer wall of the cable, so its reading may be less than the preset value. When the outer wall of the cable accumulates too much dust and dirt, the pressure of the cable on the inner ring wall may exceed the preset threshold. That is, the pressure sensor in the cable information device of the present invention can detect the degree of damage, dirt, movement and breakage of the outer wall of the cable by detecting the pressure of the cable on the inner ring wall, and the staff can detect this situation in time through the host.

[0028] In this embodiment, the number of single-chip microcomputers, hardware nodes of single-chip microcomputers, smart hook groups, smart hooks in the smart hook groups and cable information acquisition devices 5 are all integers greater than or equal to 1. The cable information includes the temperature value of the outer wall of the cable, the pressure of the cable on the inner ring wall and the leakage current value of the outer wall of the cable. The leakage current sensor can adopt advanced optical fiber current or leakage current mutual inductance sensors. In other optional embodiments, personnel in this field can select suitable small-volume leakage current sensors for use in the present invention.

[0029] In this embodiment, the side wall of the sensing ring includes a first side wall 6 and a second side wall (not shown in the figure). The first side wall 6 is provided with a signal transmitter 7 adjacent to the inner ring wall, and the second side wall, which is the back of the first side wall, is provided with a signal receiver adjacent to the inner ring wall. The signal transmitter 7 is used to transmit a detection signal close to the outer wall of the cable, and the detection signal is used to detect the degree of dirtiness and damage on the surface of the cable. In this embodiment, the signal transmitter 7 and the signal receiver are annular arrays, thereby realizing all-round monitoring of the cable.

[0030] In another embodiment, the smart hook group includes a class A smart hook, A is an integer greater than or equal to 1, the single chip computer is connected to B smart hook groups, among the B smart hook groups, the first side wall 6 and the second side wall of the sensing ring of the smart hook of the 2C+1 smart hook group are both distributed with signal transmitters 7 adjacent to the inner ring wall, the first side wall 6 and the second side wall of the smart hook of the 2C+2 smart hook group are both distributed with signal receivers adjacent to the inner ring wall, C is an integer greater than or equal to 0, and on a single cable, the cable between two adjacent smart hooks is the detection area.

[0031] In addition, a smart hook circuit is arranged inside the smart hook, and the smart hook circuit includes a sensor circuit. The sensor circuit is connected to the cable information acquisition device 5, the signal transmitter 7 and the signal receiver, and the sensor circuit is used to transmit the cable information.

[0032] The first end of the first sensing semicircular ring 3 is provided with a protrusion, the first end of the second sensing semicircular ring 4 is provided with a groove adapted to the protrusion, and the second end of the second sensing semicircular ring 4 is provided with a male and female socket. The intelligent hook circuit of the first sensing semicircular ring 3 is used to connect the intelligent hook circuit of the second sensing semicircular ring 4 through the male and female sockets, so that the sensing ring can be closed and the complete connection of the internal circuit of the sensing ring is ensured. When the cable passes through the sensing ring, the sensing ring can be closed by the sensing semicircular ring to fix the cable.

[0033] from Figure 2 It can also be seen that a terminal row 8 is provided at the top of the extension rod 1. In this embodiment, the terminal row 8 is used to realize the communication between the smart hook and the single-chip microcomputer. In an optional embodiment, the circuit line of the smart hook circuit protrudes from the bottom end of the extension rod 1 and is adapted to the terminal row 8. In addition, a mounting groove 9 is also provided at the top of the extension rod 1, a raised cylinder 11 is provided at the bottom end of the extension rod 1, and a circuit line connector terminal array is provided on the outer circular surface of the raised cylinder 11, and an installation circuit line is provided in the installation groove 9, and the circuit line connector terminal array is adapted to the installation circuit line, and the raised cylinder 11 is adapted to the installation groove 9. In this way, the smart hooks in the smart hook group can be connected up and down.

[0034] The smart hook includes a first-level smart hook and a second-level smart hook. The top of the extension rod 1 of the first-level smart hook is provided with a mounting protrusion 10 and a female terminal block. The mounting protrusion 10 is used to fix the first-level smart hook in the coal mine. In the first-level smart hook, the female terminal block is the aforementioned wiring terminal block 8, which is used to realize the communication between the first-level smart hook and the single-chip microcomputer.

[0035] The present invention proposes an intelligent hook group, the intelligent hook group is the aforementioned intelligent hook, and the intelligent hook group is composed of a first-level intelligent hook and a subsequent-level intelligent hook. Specifically, the intelligent hook group includes D-level intelligent hooks connected in sequence from top to bottom, the first-level intelligent hook is located at the first level, and the raised cylinder 11 of the E-level intelligent hook in the intelligent hook group is installed in the installation groove 9 of the E-1-level intelligent hook, where E is an integer, E is greater than or equal to 2 and E is less than or equal to D.

[0036] Figure 3 FIG. 1 is a structural diagram of an embodiment of a connection method of a smart hook in a smart hook group of the present invention. Figure 3 The smart hook on the upper side is the first-level smart hook, and the smart hook on the lower side is the second-level smart hook. Figure 3It can be seen that the upper end of the extension rod 1 of the first-level intelligent hook is provided with a cylindrical mounting protrusion 10. The mounting protrusion 10 is used to fix the first-level intelligent hook in the coal mine. The outer circular surface of the mounting protrusion 10 is provided with a circuit line connector terminal array, which is used to connect the subsequent intelligent hook. The size of the mounting groove 9 of the subsequent intelligent hook can be adapted to the protruding cylinder 11 of the first-level hook, and the mounting groove 9 is provided with a circuit line connector, which can be adapted to the circuit line connector terminal array of the mounting protrusion 10 of the first-level hook, thereby realizing the upper and lower connection of two or even more intelligent hooks. In this embodiment, the intelligent hooks in the same intelligent hook group all adopt this connection method.

[0037] Figure 4 This is a schematic diagram of an embodiment of the intelligent hook monitoring cable of the present invention, Figure 4 It can be seen that the sensing rings of the two smart hooks tightly clamp the tested cable. It should be noted here that the two smart hooks belong to the same level of hooks in two adjacent smart hook groups, that is, a single chip microcomputer is provided with multiple smart hook groups. Under a certain single chip microcomputer, the signal transmitter 7 of the G-level smart hook in the F-th smart hook group is used to transmit the detection signal close to the outer wall of the cable to the signal receiver of the G-level smart hook in the F+1-th smart hook group, and the signal transmitter 7 of the G-level smart hook in the F+1-th smart hook group is used to transmit the detection signal close to the outer wall of the cable to the signal receiver of the G-level smart hook in the F+2-th smart hook group, and so on. F and G are integers greater than or equal to 1.

[0038] In such Figure 4 In the illustrated embodiment, a signal transmitter and a signal receiver are respectively distributed on the two side walls of a smart hook, i.e., the first side wall and the second side wall, so that the signal transmitter on the first side wall of a smart hook can transmit a signal to the signal receiver on the second side wall of an adjacent smart hook. In an optional embodiment, a signal transmitter is distributed on both side walls of a smart hook, and a signal receiver is distributed on both side walls of another adjacent smart hook.

[0039] Due to the large amount of dust in the coal mine, when the outer wall of the cable is dirty and damaged, the time for the detection signal to pass through the outer wall of the cable will change. The host can judge the degree of dirtiness and damage of the outer wall of the cable according to the transmission time of the detection signal and the predetermined value. Due to the damage and dirtiness of the outer wall of the cable, when the detection signal close to the outer wall of the cable passes through the outer wall of the cable, the parameters of its signal (such as amplitude, frequency, etc.) will change. The host can also judge the degree of damage and dirtiness of the outer wall of the cable by comparing the detection signal emitted by the signal transmitter 7 with the detection signal received by the signal receiver. In this embodiment, the detection signal can be ultrasonic or laser. In other optional embodiments, the detection signal can also be other signals that are not easily susceptible to electromagnetic interference.

[0040] Since the process of the signal transmitter 7 transmitting the detection signal to the signal receiver is completed in the coal mine environment, in order to simplify the system design as much as possible and avoid mutual interference between the detection signals, the transmission direction of the detection signal of the present invention is unidirectional, that is, the direction in which the signal transmitters 7 on all the smart hooks transmit the detection signal is consistent. And in order to further avoid mutual interference between the detection signals emitted by multiple signal transmitters, the host of the present invention is set with an algorithm for polling and driving the signal transmitter 7 and the signal receiver in a time sequence, so that the signal transmitter 7 and the signal receiver of each smart hook work in turns within a preset time period, avoiding mutual interference.

[0041] The smart hook of the present invention is provided with an energy collection system. Figure 5 The schematic diagram of an embodiment of the energy harvesting system of the present invention. In this embodiment, the energy harvesting system may include an energy harvesting device, an energy harvesting circuit and an energy collection device. The energy harvesting device is annular and embedded in a sensing ring. The sensing ring is used to tighten and monitor the cable. The energy harvesting device is used to collect electrical energy from the cable. The energy harvesting circuit is connected to the energy harvesting device. The energy harvesting circuit includes a rectifier module and a filter module. The rectifier module is connected to the filter module. The rectifier module is used to rectify the electrical energy. The filter module is used to filter the electrical energy passing through the rectifier module. The energy collection device is connected to the energy harvesting circuit. The energy collection device includes a battery and an effective value conversion circuit connected to the output end of the battery. The battery is used to store the electrical energy output by the energy harvesting circuit. The effective value conversion circuit is used to adjust the electrical energy output by the energy harvesting circuit.

[0042] Specifically, the energy harvesting device may include a winding and an annular magnetic core, the winding is wound on the surface of the annular magnetic core, the winding includes a primary winding and a secondary winding, the primary winding is connected in series in the cable, and the secondary winding is connected to the energy harvesting circuit. The annular magnetic core includes a first half-ring magnetic core and a second half-ring magnetic core, the first half-ring magnetic core is embedded in the first sensing semicircular ring 3, the second half-ring magnetic core is embedded in the second sensing semicircular ring 4, and the energy harvesting device is arranged inside the sensing circular ring, so that the annular magnetic core and the sensing circular ring move in unison, and when the sensing circular ring is closed, the annular magnetic core is also closed, thereby forming a closed loop, so as to obtain the induced electromotive force.

[0043] Accordingly, the present invention proposes an energy collection method for a mining power transmission cable, the energy collection method adopts the aforementioned intelligent hook, and the energy collection method may include: Step Ⅰ: Intelligent hook tightens the cable; Step II: The transmission current flows through the cable, and the transmission current generates a changing magnetic field in the primary winding; Step III: The annular magnetic core enhances the changing magnetic field, and the enhanced changing magnetic field excites an induced voltage in the secondary winding; Step IV: The induced voltage enters the energy collection device through the rectification module and the filtering module.

[0044] In this embodiment, the annular magnetic core is an easily saturated annular magnetic core. The easily saturated magnetic core has a higher magnetic permeability. Therefore, when the easily saturated magnetic core is not saturated, it can have a higher magnetic permeability to generate a sufficiently large induced electromotive force.

[0045] The interior of the smart hook is provided with a smart hook circuit for transmitting the internal electrical signal of the smart hook. The smart hook circuit includes a sensor circuit, an energy collection circuit, and a main circuit and a branch circuit for realizing the transmission of electrical signals within the smart hook group. The sensor circuit is connected to the cable information acquisition device 5, the signal transmitter 7 and the signal receiver. The sensor circuit is used to transmit the cable information, the detection signal emitted by the signal transmitter 7 and the detection signal received by the signal receiver to the single-chip microcomputer. The energy collection circuit is used to power the single-chip microcomputer and the smart hook.

[0046] It should be noted here that the single-chip microcomputer is connected to a battery (not shown in the figure). Since the power demand of the sensing ring is relatively small, the energy collected by the energy harvesting circuit can meet the needs of the sensing ring, but the single-chip microcomputer requires a large amount of power for monitoring and controlling the smart hook. Therefore, the present invention provides a battery for powering the single-chip microcomputer, and the energy harvesting circuit can charge the battery.

[0047] Figure 6 FIG. 1 is a schematic diagram of a structure of an embodiment of the intelligent hook circuit of the present invention. The intelligent hook circuit may include multiple main circuits and branch circuits. Figure 6It can be seen that the intelligent hook circuit of this embodiment may include 3 main paths and 3 branch paths, and the number of main paths and branch paths should be equal to the number of intelligent hooks in a smart hook group. When the intelligent hook circuit is the intelligent hook circuit of the first-level intelligent hook, the main path is used to connect the single-chip microcomputer and the next-level intelligent hook circuit. When the intelligent hook circuit is the last intelligent hook in a smart hook group, the main path is used to connect the previous-level intelligent hook circuit. When the intelligent hook circuit is the intelligent hook circuit of other intelligent hooks, the main path is used to connect the previous-level intelligent hook circuit and the next-level intelligent hook circuit.

[0048] from Figure 6 It can be seen that the main road is provided with a main road switch, which is used to control the on and off of the main road, and the first end of the branch road is connected to the downstream of the main road switch. The branch road is provided with a selector switch, which is used to control the on and off of the branch road. It should be noted that the first end of the branch road is connected to the downstream of the main road switch, so that the relationship between the main road switch and the branch switch is changed from parallel to progressive. When the staff wants to close the first-level intelligent hook, the intelligent hook can be closed by disconnecting the main road switch, and there is no need to operate the branch switch, thereby improving work efficiency.

[0049] from Figure 6 It can also be seen that the second end of the branch is connected to the aforementioned sensor circuit and energy collection circuit. In a smart hook group, when the previous level smart hook or single-chip microcomputer occupies the first main road, the switch SB1 will be disconnected to prevent other smart hooks from occupying the first main road and the first loop; when the circuit selection of the previous level smart hook or single-chip microcomputer is completed, the smart hook circuit of this level can select the second main road, that is, close SB2 in the smart hook circuit of this level, and close SA of the second branch to S2; when the circuit selection of the smart hook of this level is completed, the smart hook circuit of the next level can select the third main road, and at this time SB3 of the smart hook circuit of the smart hook of this level is disconnected.

[0050] In addition, in the smart hook group, the main circuits of the H-class smart hooks are connected in series in sequence, and the branch circuits of the H-class smart hooks are independent of each other, and H is an integer greater than or equal to 1.

[0051] The present invention also proposes a method for connecting the upper and lower parts of the smart hooks in the aforementioned smart hook group, and the upper and lower connection method may include: Step I: disconnect all N main roads in the intelligent hook group through the main road switch, and disconnect all N branch roads in the intelligent hook group through the selector switch; Step II: Close all the N main road switches in the intelligent hook circuit of the first-level intelligent hook, and close the selector switch to the first branch; Step III: Close the main road switches from the second to the Nth main roads in the smart hook circuit of the second-level smart hook, close the selector switch to the second branch, from the second level to the Nth level, and so on until the smart hook circuits of all smart hooks are connected.

[0052] Figure 7 The figure is a schematic diagram of the distribution of the smart hooks of the present invention. The system operation architecture of the present system adopts a pyramid three-level model. Each smart cable hook group contains more than or equal to one smart hook. Each smart hook has a set of sensor data, and the sensor data is an analog value. In order to realize the cable line fault location, without adding additional circuit components, it is required that all smart hooks of each smart cable hook group should connect the data transmission line of the smart hook to the data input module of the corresponding single-chip system in order from top to bottom.

[0053] If the smart hook circuit is connected to the first group of data acquisition channels of the single-chip microcomputer system, the first smart hook circuit of this smart hook group should be connected to the knob switch SB1, and so on, the second smart hook circuit of the smart hook group should be connected to the knob switch SB2. When the smart hook group is connected to the single-chip microcomputer system according to the above rules, all connected smart hook circuits under a single-chip microcomputer system will be connected to the single-chip microcomputer system data input channel in order from top to bottom and then from left to right. Figure 7 It can be seen that the 1st group of data input channels... the 1.wth group of data input channels... the w×mth group of data input channels of the single-chip microcomputer system will be connected in the order of smart hook 1.1...smart hook 1.w...smart hook 2.1...smart hook 2.w...smart hook m.1...smart hook mw.

[0054] The single-chip microcomputer of the present invention is located upstream of the intelligent hook group and in the coal mine. The single-chip microcomputer communicates with the intelligent hook through analog direct connection or serial communication. The monitoring host is located on the ground. Due to the large amount of electromagnetic interference in the coal mine, the monitoring host and the single-chip microcomputer can communicate through the detection optical fiber, and the detection optical fiber is used to detect and transmit the temperature and sound waves in the environment around the cable. Specifically, the monitoring host can include a DAS module and a DTS module at the same time, that is, the monitoring host of the present invention can include an integrated DAS host and a DTS host, so that the detection optical fiber becomes a temperature sensor and a sound wave sensor, thereby monitoring physical quantities such as temperature and sound waves around the cable.

[0055] In addition, the monitoring host is used to poll the driving signal transmitter 7 and the signal receiver in a timed manner, and judge the degree of dirtiness and damage of the outer wall of the cable according to the transmission time of the detection signal. The detection signal is a one-way ultrasonic wave or laser. The smart hook is provided with an alarm system, which includes an alarm device and an alarm circuit. The alarm device is used to sound an alarm. When the cable information exceeds a preset range, the monitoring host controls the alarm device of the smart hook closest to the fault location to be in an open state. The subsequent monitoring method will introduce this part in detail.

[0056] In other words, the monitoring system may include a transmission cable area and a monitoring host control area. The transmission cable area includes cables, intelligent hook groups and single-chip microcomputers. The monitoring host control area includes a monitoring host. The monitoring host includes a DAS module and a DTS module. The detection optical fiber is used to detect the temperature and sound waves in the transmission cable area and transmit the temperature and sound waves to the monitoring host. The DAS module is used to extract sound waves and the DTS module is used to extract temperature.

[0057] The circuits used in the monitoring system of the present invention are summarized here. Figure 8 Schematic diagram of the circuit module used in the monitoring system of the present invention. Figure 8 It can be seen that the cable hook circuit can include a temperature sensing circuit, a pressure sensing circuit, a leakage current sensing circuit, a cable electromagnetic energy collection circuit, an ultrasonic or laser array sensing circuit, the single-chip microcomputer circuit can include a sensor data processing and conversion circuit, a single-chip microcomputer system and peripheral circuit, and an optical fiber communication module circuit. The host circuit can include a host CPU mainboard circuit, a screen display and key operation module circuit, and a communication module circuit.

[0058] The present invention also proposes a fault monitoring method for a mine power transmission cable, which may include the following steps: Step I: Determine the risk score of possible damage to the cable when it is in the detection area, the risk score = environment score + production drive area score + historical alarm record score + power supply score, the environment score indicates the degree to which the environment affects the detection signal of the detection device and thus affects the accuracy of the detection result (for example, the impact of the noise environment on the ultrasonic signal, the impact of light on the laser signal, etc.), the production drive area is the working area of ​​the underground production equipment in the coal mine, the historical alarm record score is obtained based on the historical alarm records, the power supply score is strongly correlated with whether the electrical equipment in the detection area is powered on, and the risk score determines the highest risk area in the detection area, and the highest risk area has the highest risk score; Step II: Set the drive time interval t in the host g The host controls the single chip microcomputer according to the driving time interval t gThe cable information detection device group is driven by polling. On a single cable, the signal transmitter 7 on the 2M+1th smart hook and the 2M+3th smart hook transmits the detection signal close to the outer wall of the cable to the signal receiver on the 2M+2th smart hook. The 2M+1th smart hook, 2M+2th smart hook and 2M+3th smart hook on a single cable and the cable area between the 2M+1th smart hook and the 2M+3th smart hook constitute the minimum detection area. It should be noted here that the concepts of the "detection area" and the "minimum detection area" are different. The risk of the "detection area" indicates the risk of damage to the cable when it is in such a "detection area". Therefore, a minimum detection area is included in a detection area for which a damage risk score is determined.

[0059] Step III: Setting the minimum detection area detection device group driving time interval t in the host g , t g Including t, at, b i t, b j t and dt, where t is the minimum time interval, which is used to indicate the time interval at which the cable information detection device group in the minimum detection area is driven when the minimum detection area is located in the highest risk area, g is the number of the minimum detection areas, and a is the weight of whether there is an interference signal near the above minimum detection area. When there is interference, a=0, is the regional danger interval time weight, 1....h}, where Indicates the risk level, The smaller it is, the lower the risk level is. The bigger, Indicates the risk interval weight of the area with the highest risk level; historical alarm interval weight 1....k}, where Indicates the number and level of historical alarms. The smaller it is, the smaller the magnitude of historical alarms will be. The bigger, Indicates the weight of the historical alarm time interval with the largest historical alarm magnitude; d is the weight when the device powered by the cable is not running, and d=0 when the device is running; Step IV: Since there is a large difference in the probability of dirt accumulation on the upper and lower surfaces of the power line or the insulation layer on the outer surface of the power line being damaged and peeling, in the coal mine environment, the probability of dirt accumulation and damage on the upper surface of the cable is much higher than that on the lower surface. Therefore, when the minimum detection area detection device group is driven for a time interval t gAfter the determination, a driving times quota is determined for each signal transmitter 7 in the detection device group. In this embodiment, the signal transmitter 7 on the lower surface of the cable is g Time, it will be driven q times, q is greater than or equal to 1, and because the probability of risk on the upper surface of the cable is high, the signal transmitter 7 on the upper surface of the cable can be assigned a drive number of Xq, X>1 and X is an integer. It should be noted that when the detection drive number of a signal generator is q, and q is greater than 1, it will not be driven q times in a continuous time, but will be polled and driven together with other transmitters one by one in a clockwise or counterclockwise direction until the detection drive number is 0, at which time it will exit the drive polling queue.

[0060] In step II, when the signal receiver of the 2M+2th smart hook receives two consecutive detection signals transmitted from the signal transmitter 7 of the 2M+1th smart hook, and both detection signals are normal signals, the single chip microcomputer drives the signal transmitter 7 of the 2M+3th smart hook to transmit two consecutive detection signals to the signal receiver of the 2M+2th smart hook. The normal signal is the detection signal received by the signal receiver when there is no fault on the outer surface of the cable.

[0061] The 2M+1th smart hook, 2M+2th smart hook and 2M+3th smart hook on a single cable and the cable between the 2M+1th smart hook and the 2M+3th smart hook constitute the minimum detection area. The minimum detection area located at the smart hook of this level is the current minimum detection area, the minimum detection area adjacent to the current minimum detection area and located at the smart hook of the previous level is the upper minimum detection area, and the minimum detection area adjacent to the current minimum detection area and located at the smart hook of the next level is the lower minimum detection area. When the current minimum detection area is ready to drive the signal transmitter 7 and the signal receiver, the single chip will scan the upper minimum detection area and the lower minimum detection area.

[0062] Specifically, when the signal transmitter 7 and the signal receiver of the upper minimum detection area and the lower minimum detection area are in an idle state, the signal transmitter 7 and the signal receiver of this minimum detection area are driven in sequence clockwise or counterclockwise; when the signal transmitter 7 and the signal receiver of the upper minimum detection area and / or the lower minimum detection area are driven in sequence clockwise or counterclockwise, the line connecting the initially driven signal transmitter 7 and the signal receiver of this minimum detection area and the center of the inner circular wall is the first radius, and the line connecting the initially driven signal transmitter 7 and the signal receiver of the upper minimum detection area and the lower minimum detection area and the center of the inner circular wall is the second radius, and the first radius and the second radius have a deviation angle θ.

[0063] In this embodiment, the signal transmitter 7 on the side wall of the smart hook of the present invention is a laser transmitter, and the signal receiver is a laser receiver; or the signal transmitter 7 is an ultrasonic transmitter, and the signal receiver is an ultrasonic receiver. Fig. 9 This is a schematic diagram of the principle of the signal transmitter 7 and the signal receiver detection cable of the smart hook of the present invention. Fig. 9 G1-1, G1-2, G2-1, G2-2, G3-1, G3-2 are signal transmitters 7 or signal receivers. Fig. 9 The specific monitoring process of the monitoring system of the intelligent hook of the present invention in two situations is introduced respectively.

[0064] Regardless of the laser or ultrasonic method, the detection device group (multiple signal transmitters 7 and signal receivers) in the minimum detection area will be used as the overall object for allocating polling time. g After the determination, a driving times quota is determined for each signal transmitter 7 in the group. In this embodiment, the signal transmitter 7 on the lower surface of the cable is g Time, it will be driven q times, q is greater than or equal to 1, and because the probability of risk occurring on the upper surface of the cable is high, the upper surface of the cable can be assigned a driving number of Xq, X>1 and X is an integer.

[0065] When the signal transmitter 7 on the side wall of the smart hook of the present invention is a laser transmitter and the signal receiver is a laser receiver, the working principle of the monitoring system of the present invention is as follows: like Fig. 9 As shown, when the first side wall 6 (left side) of the sensing ring of the smart hook G2 is installed with a laser receiver, and the second side wall (right side) is installed with a laser transmitter, the laser sensors on both sides of the sensing rings of the smart hooks G1 and G3 need to match those of G2. When laser receivers are installed on both side walls of the sensing ring of the smart hook G2, laser transmitters need to be installed on both side walls of the sensing rings of the smart hooks G1 and G3. Other smart hooks are adapted to suitable laser transmitters and laser receivers according to the above rules. The general principle is that the two opposite sides between the two smart hooks need to ensure that one is only installed with a laser transmitter, and the other is only installed with a laser receiver.

[0066] Next, the working principle of the smart hooks G1 and G3, which require laser transmitters to be installed on both side walls of the sensing ring, is described in detail when laser receivers are installed on both side walls of the sensing ring of the smart hook G2.

[0067] Since cable abnormality or failure is a low-probability event, long-term laser scanning detection will consume a lot of energy and accelerate device aging; and the probability of dirt accumulation on the upper and lower surfaces of the power line or the insulation layer on the outer surface of the power line is very different. In the coal mine environment, the degree of dirt accumulation on the upper surface of the cable is high, and the probability of damage is higher, which is much greater than the lower surface. In addition, environmental factors may affect the detection signal of the detection device and thus affect the accuracy of the detection result (such as the impact of the noise environment on the ultrasonic signal, the impact of light on the laser signal, etc.). In addition, the probability of abnormal conditions occurring in different areas where the power line passes will also be different. For example, the probability of abnormal conditions occurring in cables in unmanned working areas is relatively lower than that in production drive sites, while the probability of abnormal conditions occurring in cables in areas with manned work and close to production drive sites is higher. In addition, the system can also collect statistics and summarize historical alarms, and increase the probability of abnormal situations occurring at points where abnormal alarms are often confirmed (this abnormal situation can be laser receiver alarm data or other sensor alarm data); at the same time, since the probability of abnormal situations occurring during equipment power use is higher, whether the power supply equipment is powered on is also an important indicator.

[0068] Therefore, the driving time interval of the laser emitter group in the minimum detection area of ​​a laser detection method can have the following model: First, the user sets a minimum scanning time interval t for the laser emitter group driving the minimum detection area on the host software. This minimum time interval t represents the laser scanning interval time for the point with the greatest risk (the cable accessories in the minimum detection area have interference light signals that interfere with the laser signal, the cable passes through a high-risk area, the number of historical alarms is large, and the cable power transmission connection equipment is already in operation, etc.). Thus, the driving time interval t is set in the host. g , t g =t+at+b i t+b j t+dt, where t is the minimum time interval, which is used to indicate the time when the cable information detection device detects that the minimum detection area is in the highest risk area, g is the number of minimum detection areas, and a is the weight of whether there is an interference signal near the above minimum detection area. When there is interference, a=0. is the regional danger interval time weight, 1....h}, where Indicates the risk level, The smaller it is, the lower the risk level is. The bigger, Indicates the risk interval weight of the area with the highest risk level; historical alarm interval weight 1....k}, where Indicates the number and level of historical alarms. The smaller it is, the smaller the magnitude of historical alarms will be. The bigger, Indicates the weight of the historical alarm time interval with the largest historical alarm magnitude; d is the weight when the device powered by the cable is not running, and d=0 when the device is running; When the laser transmitter detection drive time interval is determined, the host will automatically adjust this time interval according to the operating conditions and parameter setting changes, and send instructions to the single-chip microcomputer to enable the corresponding laser transmitter group. After the single-chip microcomputer drives the laser transmitter to emit laser, under normal working conditions, the laser receiver will receive a laser signal of normal intensity within a certain time. If the laser receiver does not receive the laser signal within the correct time, or the received light intensity is abnormal, an alarm signal will be immediately sent to the host, and the host will immediately sound an alarm. The single-chip microcomputer system can accurately determine the laser emission and reception time, analyze and judge the corresponding data, and immediately report any abnormalities to the host.

[0069] Next, the working principle of installing ultrasonic transmitters on both side walls of the sensing ring of the smart hook G1 and G3 when ultrasonic receivers are installed on both side walls of the sensing ring of the smart hook G2 is described in detail.

[0070] There are certain defects in using laser lines to detect whether there is dirt accumulation on the outer surface of the cable or whether the cable is damaged. That is, the laser lines must be dense enough, otherwise the outer surface of the cable cannot be effectively detected and covered. However, too many laser line transmitters will also cause the problem of high circuit overhead. At this time, consider using ultrasonic sensors to detect abnormal conditions.

[0071] Unlike the laser detection method, the laser lines emitted by the close laser transmitters rarely interfere with each other, while the ultrasonic transmitters often cause crosstalk if they are too close, resulting in inaccurate data. At the same time, there are often production operations around the cable, which will generate more noise, which may interfere with the ultrasonic wave and cause data anomalies. At this time, the classic processing method is adopted: the soft processing method based on heuristic thinking, using continuous reading comparison and alternating delay comparison to reduce ultrasonic crosstalk. Continuous reading comparison is to compare the data measured by a certain ultrasonic sensor twice in a row. If the difference between the two consecutive measured data is very small, it is considered that the data is not generated by noise; alternating delay comparison refers to polling control of each ultrasonic sensor in the ultrasonic sensor array, that is, each ultrasonic sensor waits for a short time delay after emitting the ultrasonic wave before the next ultrasonic sensor emits the ultrasonic wave, so that each group of ultrasonic sensors only receives the ultrasonic wave emitted by itself. However, since this system will deploy multiple groups of ultrasonic arrays along the cable, how to further form the ultrasonic array driving strategy of this system based on the above heuristic thinking is an important task. This strategy is closely related to the working mode of the ultrasonic array and the installation method of the sensor.

[0072] Due to changes in environmental conditions, there are large temperature changes along the cable line; these factors will cause abnormal distortion of ultrasonic detection data and produce false alarms. Considering the influence of ambient temperature on the speed of ultrasonic sound, the propagation speed of ultrasonic waves in the medium changes with the changes in the surrounding environment, among which the influence of temperature is the most significant. The calculation formula for the speed of ultrasonic sound in air is: C = 331.45+0.607 Where: C is the ultrasonic sound velocity, unit is m / s; is the temperature in °C.

[0073] Combining the ultrasonic sound velocity data measured in different ambient temperatures, it can be concluded that when the temperature is When the temperature changes between 1°C and 1°C, the ultrasonic sound velocity increases by about 0.6m / S. If the ambient temperature is not compensated, it will cause huge errors to the ultrasonic ranging system.

[0074] On the basis of the aforementioned laser transmitter and laser receiver, the ultrasonic transmitter and ultrasonic receiver have more requirements.

[0075] According to the detection characteristics of ultrasonic waves, this system considers the working mode of ultrasonic sensor's transmitter and receiver separation: In order to reduce ultrasonic crosstalk and minimize system complexity, the following design is made. Assuming that G1, G2, and G3 are the first, second, and third smart hooks on the cable line, this system stipulates that ultrasonic receivers need to be installed on both sides of the sensing ring of smart hook G2, and ultrasonic transmitters need to be installed on both sides of the sensing ring of smart hooks G1 and G3; the subsequent smart hooks are similar. One advantage of this design is that the cable between G1 and G2 can be , cable between G2 and G3 , these two sections of cable are regarded as a minimum detection area, that is, the ultrasonic transmitter on the right side of the perception ring of G1 and the ultrasonic transmitter on the left side of the perception ring of G3 will be polled and driven by a unified program logic to transmit ultrasonic signals to the ultrasonic receiver on the perception ring of G2. According to this setting, the ultrasonic sensors along this cable line will be scheduled and driven according to several two-section cable intervals separated by the intelligent hooks.

[0076] The above-mentioned minimum detection area will be assigned an ultrasonic detection interval time t1. Within the interval time t1, the single-chip microcomputer will drive the ultrasonic transmitter on the right side of the sensing ring of G1 and the ultrasonic transmitter on the left side of the sensing ring of G3 in sequence, that is, using the alternating delay comparison strategy; each ultrasonic transmitter will also follow the above-mentioned continuous reading comparison strategy, that is, each time an ultrasonic transmitter is driven, it will actually drive the ultrasonic transmitter to emit two ultrasonic signals. When the ultrasonic receiver receives two normal and accurate ultrasonic signals, the single-chip microcomputer will logically drive the next ultrasonic transmitter in this detection area.

[0077] In an optional embodiment, in order to reduce the mutual interference of ultrasonic signals with similar distances, the ultrasonic transmitter and the ultrasonic receiver can only be driven by area. In this working mode, considering that the interference effect of noise on the ultrasonic signal is large, it will cause the problem of low robustness of the correct detection results. Therefore, it is necessary to shorten the detection polling interval t for areas with large noise. The ultrasonic method will poll the ultrasonic group of a single minimum detection area and treat this ultrasonic group as an integral object driven by polling.

[0078] At the same time, considering that the strength of the noise interference source in the area where the cable passes has a relatively large impact on the ultrasonic detection results, it is necessary to increase the number of drives of the ultrasonic equipment in areas with a lot of noise and strong noise, and to ensure the accuracy of the detection results as much as possible by increasing the number of detection values.

[0079] In this embodiment, the detection signal emitted by the signal transmitter 7 may be ultrasonic waves that are prone to mutual interference and lasers that are not prone to mutual interference. In other optional embodiments, the detection signal transmitted between the signal transmitter 7 and the signal receiver may also be other signals that are prone to mutual interference and other signals that are not prone to mutual interference.

[0080] The same strategy as the laser method is used to determine the ultrasonic group detection drive time interval tg of the minimum detection area. The host will automatically adjust this time interval according to the operating conditions and parameter setting changes, and send instructions to the single-chip microcomputer so that it can correspond to the ultrasonic transmitter group. After the single-chip microcomputer drives the ultrasonic transmitter to transmit ultrasonic waves, the ultrasonic receiver will normally receive ultrasonic signals of normal intensity within a certain period of time. If the ultrasonic receiver does not receive the ultrasonic signal within the correct time, or the received ultrasonic amplitude, frequency and other parameters are abnormal, an alarm will be generated immediately. The single-chip microcomputer system can accurately determine the ultrasonic emission and reception time, analyze and judge the corresponding data, and immediately report to the host platform if any abnormal situation is found. The calculation of the ultrasonic propagation time requires the combination of the temperature data of the area where the ultrasonic wave is located to dynamically adjust the ultrasonic sound velocity. A temperature sensor is deployed on the inside of the intelligent sensing ring. This system can accurately determine the ultrasonic sound velocity of each intelligent hook and automatically judge and adjust it, further improving the accuracy of the strategy.

[0081] However, the intelligent hook group of this system includes more than one intelligent hook, and a group of multiple intelligent hooks are connected in an upper and lower manner. According to the characteristics of ultrasound, in addition to the crosstalk of the ultrasonic group in the above-mentioned minimum detection area, the ultrasonic sensors in the two minimum detection areas spaced parallel to each other may also have crosstalk. In order to minimize the impact of interference on system detection, a staggered detection method for the minimum detection areas spaced parallel to each other is proposed: when a minimum detection area (this minimum detection area) is ready to drive ultrasonic detection, it first scans the minimum detection areas spaced above and below it, that is, whether the upper minimum detection area and the lower minimum detection area are undergoing ultrasonic detection. At this time, there are the following 9 situations: "None or no detection" means that the minimum detection area does not exist, or the ultrasonic transmitter and ultrasonic receiver in the minimum detection area of ​​the smart hook are in an idle state. In view of the above nine situations, the present invention provides the following solutions: For the first case, that is, both the upper minimum detection area and the lower minimum detection area are in a non-detection or non-detection state, in order to avoid mutual interference of ultrasonic waves, we only need to consider the interference between multiple ultrasonic transmitters or ultrasonic receivers on a smart hook in this minimum detection area. Fig.10The figure is a schematic diagram of an embodiment of a side wall of the sensing ring of the minimum detection area of ​​the present invention in the first case. In this embodiment, the initial ultrasonic transmitter or ultrasonic receiver is Q1. When the ultrasonic transmitter and ultrasonic receiver of the minimum detection area are working, they will sequentially drive the ultrasonic transmitter and ultrasonic receiver on the sensing ring in a clockwise or counterclockwise direction, that is, they will sequentially drive the ultrasonic transmitter by rotating one circle clockwise or counterclockwise from 0° of the sensing ring.

[0082] It should be noted that the side walls of a sensing ring of a minimum detection area include the first side wall 6 of the sensing ring of 2M+3 and the second side wall of the sensing ring of 2M+1. At this time, it is stipulated that the signal transmitters 7 of the first side wall 6 and the second side wall are synchronized. They will be driven in sequence and in the same driving action with a safety time interval, but in order to avoid confusion in the description, only one side wall of a sensing ring is used for discussion below.

[0083] For the second and fourth cases, that is, the upper minimum detection area is in the no or non-detection state, and the lower minimum detection area is in the detecting state, or the lower minimum detection area is in the no or non-detection state, and the upper minimum detection area is in the detecting state. Fig.11 Schematic diagram of an embodiment of a side wall of the sensing ring of the minimum detection area of ​​the present invention in the second case and the fourth case. In the above two cases, the black dot Q1 on a side wall of the sensing ring of the lower minimum detection area or the upper minimum detection area is the initial ultrasonic transmitter and ultrasonic receiver, and the lower minimum detection area or the upper minimum detection area is working at this time, then the minimum detection area will be deflected 120° clockwise based on the angle of the ultrasonic transmitter or ultrasonic receiver Q1 to determine the nearest Q2 as the initial ultrasonic transmitter or ultrasonic receiver.

[0084] For the third and seventh situations, that is, the upper minimum detection area is in a non-detection or non-detection state, the lower minimum detection area is in a detection state, or the lower minimum detection area is in a non-detection or non-detection state, and the upper minimum detection area is in a detection state. In this case, at the same time, the current minimum detection area and the lower minimum detection area or the upper minimum detection area have ultrasonic transmitters or ultrasonic receivers ready to drive. At this time, from top to bottom, first determine which ultrasonic transmitter or ultrasonic receiver in the current minimum detection area is driven. When the driven ultrasonic transmitter or ultrasonic receiver in the upper minimum detection area is determined, then determine the driven ultrasonic transmitter or ultrasonic receiver in the current minimum detection area, and finally determine the driven ultrasonic transmitter or ultrasonic receiver in the lower minimum detection area.

[0085] For the fifth case, both the upper minimum detection area and the lower minimum detection area are in the detecting state. Fig.12 It is a schematic diagram of an embodiment of a side wall of the sensing circle of the minimum detection area, the upper minimum detection area and the lower minimum detection area of ​​the present invention in the fifth case. Fig.12 (a) is a schematic diagram of an embodiment of a side wall of a perception ring of the upper minimum detection area, (b) is a schematic diagram of an embodiment of a side wall of a perception ring of the lower minimum detection area, and (c) is a schematic diagram of an embodiment of a side wall of a perception ring of the present minimum detection area.

[0086] When preparing to drive the ultrasonic transmitter or ultrasonic receiver in this minimum detection area, both the upper minimum detection area and the lower minimum detection area have ultrasonic transmitters or ultrasonic receivers working. The working driven ultrasonic transmitter or ultrasonic receiver in the upper minimum detection area is Q1 (60°), and the working driven ultrasonic transmitter or ultrasonic receiver in the lower minimum detection area is Q2 (180°). The method for determining the initial driven ultrasonic transmitter or ultrasonic receiver in this minimum detection area is as follows: Find a point in the sensing circle of this minimum detection area that has the same angle as points Q1 and Q2, and make a perpendicular bisector based on the line connecting these two points. The nearest ultrasonic transmitter or ultrasonic receiver near the intersection of the perpendicular bisector and the sensing circle is the driven initial ultrasonic transmitter of this minimum detection area. Fig.12 As shown in Figure (c), Q3 is the ultrasonic transmitter or ultrasonic receiver initially driven in this minimum detection area. In particular, when the perpendicular bisector and the sensing ring intersect at the same distance, that is, when the far point and the near point cannot be distinguished, the first intersection point in the clockwise direction is regarded as the far point, and the same applies to other cases.

[0087] For the sixth and eighth situations, that is, the upper minimum detection area is in the detecting state and the lower minimum detection area is in the ready-to-detect state, or the lower minimum detection area is in the detecting state and the upper minimum detection area is in the ready-to-detect state, this situation can be solved by combining the solution strategies of the second and fourth situations with the third and seventh situations mentioned above.

[0088] For the ninth case, that is, all three minimum detection areas are in the state of preparing for detection. First, the initial driven ultrasonic transmitter or ultrasonic receiver of the upper minimum detection area is determined, and then the initial driven ultrasonic transmitter or ultrasonic receiver of the current minimum detection area is determined, and finally the initial driven ultrasonic transmitter or ultrasonic receiver of the lower minimum detection area is determined. As the initial driven ultrasonic transmitter or ultrasonic receiver of the minimum detection area is confirmed from top to bottom, the ultrasonic detection drive process of this system will be dynamically adjusted to ensure that there will be no abnormal situation where the ultrasonic waves emitted by multiple upper and lower interval smart hooks interfere with each other.

[0089] In particular, when the ultrasonic transmitter to be driven determined by the above method in the minimum detection area is not in the driving polling queue, the ultrasonic transmitter will search for the nearest drivable ultrasonic transmitter (i.e., other ultrasonic transmitters in the driving polling queue) in a clockwise or counterclockwise direction and drive it.

[0090] In summary, the present invention provides an intelligent hook for mining power transmission cables, a mining power transmission cable fault monitoring system and a mining power transmission cable fault monitoring method. By embedding a variety of sensing sensors in the cable hooks in coal mines, real-time monitoring of power transmission line damage, leakage, breakage, short circuit and other faults can be performed. The sensors include temperature sensors, leakage current monitoring sensors, pressure sensors, ultrasonic sensors and laser transceivers, etc. The driving circuits of these sensors and the signal transmission and processing circuits can be embedded inside the hook to reduce the interference of the external magnetic field. Supplement the transmission line electromagnetic energy collection circuit to supply energy to the perception module; establish a pyramid data convergence model of upper-layer optical fiber communication and host-middle-layer single-chip system-bottom-layer analog signal perception, so as to provide a perception system with high reliability in both information collection and transmission; multiple intelligent monitoring hooks distributed along the line can achieve relatively accurate and controllable positioning of power transmission line faults.

[0091] The mine transmission line fault monitoring hook and sensing system of the present invention are embedded in the cable hook, which achieves multiple uses, reduces the workload of cable installation, improves efficiency, has rich sensing signals, multi-point information perception, and achieves all-round cable fault monitoring. The multiple hooks installed along the transmission line can be used to accurately locate the fault position in a controllable manner. The technology is mature and the solution is highly reliable. At a time when the demand for long-distance power supply in coal mines is growing, a suitable underground cable fault monitoring device is provided.

[0092] The technical scope of the present invention is not limited to the contents of the above description. Those skilled in the art can make various deformations and modifications to the above implementation without departing from the technical idea of ​​the present invention, and these deformations and modifications should all fall within the scope of the present invention.

Claims

1. An intelligent hook for mining power transmission cables, characterized in that: The intelligent hook comprises an extension rod (1), an arc-shaped hook portion (2) and a sensing ring, wherein the arc-shaped hook portion (2) is connected to the bottom end of the extension rod (1), and the sensing ring comprises a first sensing semicircular ring (3), wherein the outer surface of the first sensing semicircular ring (3) is connected to the inner wall of the arc-shaped hook portion (2), and the first sensing semicircular ring (3) is provided with a cable information acquisition device (5), and the cable information acquisition device (5) is used to acquire cable information.

2. The smart hook according to claim 1, characterized in that: The sensing ring further comprises a second sensing semicircular ring (4), the first end of the second sensing semicircular ring (4) being rotatably connected to the end of the arc-shaped hook portion (2) via a rotating shaft, the second end of the second sensing semicircular ring (4) being used to connect to the first sensing semicircular ring (3), the sensing ring being used to clamp and monitor the cable, the second sensing semicircular ring (4) being provided with a cable information acquisition device (5), the cable information acquisition device (5) being used to acquire cable information.

3. The smart hook according to claim 2, characterized in that: The sensing ring comprises an inner ring wall, an outer ring wall and a side wall. The cable information acquisition device (5) is distributed on the inner ring wall. The cable information acquisition device (5) is embedded in the inner ring wall and protrudes from the surface of the inner ring wall. The cable information acquisition device (5) comprises at least one temperature sensor, at least one pressure sensor and at least one leakage current sensor. The cable information comprises the temperature value of the outer wall of the cable, the pressure of the cable on the inner ring wall and the leakage current value of the outer wall of the cable. The side wall comprises a first side wall (6) and a second side wall. The first side wall (6) is provided with a signal transmitter (7) adjacent to the inner ring wall, and the second side wall is provided with a signal receiver adjacent to the inner ring wall.

4. The smart hook according to claim 3, characterized in that: The smart hook is provided with a smart hook circuit inside, and the smart hook circuit includes a sensor circuit. The sensor circuit is connected to the cable information acquisition device (5), the signal transmitter (7) and the signal receiver, and the sensor circuit is used to transmit the cable information.

5. The smart hook according to claim 4, characterized in that: The first end of the first sensing semicircular ring (3) is provided with a protrusion, the first end of the second sensing semicircular ring (4) is provided with a groove matched with the protrusion, the second end of the second sensing semicircular ring (4) is provided with a male and female plug strip, and the intelligent hook circuit of the first sensing semicircular ring (3) is used to connect the intelligent hook circuit of the second sensing semicircular ring (4) through the male and female plug strip.

6. The smart hook according to claim 5, characterized in that: A wiring terminal block (8) is provided at the top end of the extension rod (1), and a circuit line of the intelligent hook circuit protrudes from the bottom end of the extension rod (1) and is compatible with the wiring terminal block (8).

7. The smart hook according to claim 5, characterized in that: The top end of the extension rod (1) is provided with a mounting groove (9), the bottom end of the extension rod (1) is provided with a raised cylinder (11), the outer circular surface of the raised cylinder (11) is provided with a circuit line connector terminal array, an installation circuit line is provided in the mounting groove (9), the circuit line connector terminal array is adapted to the installation circuit line, and the raised cylinder (11) is adapted to the mounting groove (9).

8. The smart hook according to claim 7, characterized in that: The intelligent hook comprises a first-stage intelligent hook and a second-stage intelligent hook. The top end of the extension rod (1) of the first-stage intelligent hook is provided with a mounting protrusion (10) and a female terminal block. The mounting protrusion (10) is used to fix the first-stage intelligent hook in a coal mine.

9. An intelligent hook assembly, characterized in that: The smart hook group includes the smart hook as described in claim 8, and the smart hook group includes the first-level smart hook and the second-level smart hook.

10. The intelligent hook assembly according to claim 9, characterized in that: The smart hook group comprises N levels of smart hooks connected in sequence from top to bottom, the first-level smart hook is located at the first level, the raised cylinder (11) of the M-th level smart hook in the smart hook group is installed in the installation groove (9) of the M-1-th level smart hook, M is an integer, M is greater than or equal to 2 and M is less than or equal to N.

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