Cable identification device

Abstract

The present invention provides a cable identification device, including: a load power supply, a controller, a switch control circuit and a cable interface; the cable interface is used to connect the cable to be identified; one end of the switch control circuit is connected to the load power supply, and the other end is connected to the cable interface, and the switch in the switch control circuit is used to turn on or off the loop between the load power supply and the cable interface; the load power supply is connected to the controller for supplying power to the controller; the controller is used to control the on and off of the switch in the switch control circuit. The cable identification device provided by the embodiment of the present invention can quickly and accurately identify the cable without relying on human vision, touch, etc.; the controller is used to control whether to provide a detection current to the cable to be identified, which can not only realize the control of the load power supply and improve safety, but also can realize cable identification by turning on and off the switch in the switch control circuit and using the switch in the cable to detect whether there is current or no current.

Description

Technical Field

[0001] The present invention relates to the technical field of cable identification, and in particular to a cable identification device. Background Art

[0002] The service life of the secondary cable of a substation is generally 12 years. More and more old substations are facing upgrades and renovations, and the old cables need to be pulled out; or due to the upgrade of the protection device, the original cables need to be reused and transferred from different screen positions to other screen positions, and the cables also need to be pulled out. Due to the unreasonable design and age of traditional cable trenches, the cables are not on the cable racks, but piled up in the trenches. The environment in the trenches is very harsh, and there are also situations such as mutual entanglement, knotting, backlog, bundling, and wall penetration. As a result, the cables removed from the protection screen or terminal box are often only known at the two ends, but not the path, making cable identification very difficult.

[0003] Existing cable identification technology mainly relies on human vision and touch, and uses tools such as ropes and crowbars to mechanically pull out the cables. This not only requires the cooperation of multiple people, but also requires a lot of manpower and material resources, and also affects the operation time. Cable identification takes a long time. In addition, the mechanical cable identification method requires the use of tools such as crowbars and ropes, and there is also the problem of human violent pulling, which can easily cause problems such as damage to the running cables. Summary of the invention

[0004] To solve the above problems, an object of an embodiment of the present invention is to provide a cable identification device.

[0005] The embodiment of the present invention provides a cable identification device, comprising: a load power supply, a controller, a switch control circuit and a cable interface; the cable interface is used to connect a cable to be identified;

[0006] One end of the switch control circuit is connected to the load power supply, and the other end is connected to the cable interface, and the switch in the switch control circuit is used to turn on or off the loop between the load power supply and the cable interface;

[0007] The load power supply is connected to the controller and is used to supply power to the controller;

[0008] The controller is used to control the on and off of the switch in the switch control circuit.

[0009] In a possible implementation, the switch control circuit includes at least three switch components, and the cable interfaces correspond to the switch components one by one; the switch components include a main switch and an auxiliary switch;

[0010] One end of the main switch is connected to the first electrode of the load power supply, and one end of the auxiliary switch is connected to the second electrode of the load power supply; the other end of the main switch and the other end of the auxiliary switch are both connected to the cable interface corresponding to the switch assembly;

[0011] The controller is used to: when identifying the cable to be identified that is connected to the cable interface corresponding to the switch component, control the main switch of the switch component to be turned on and the auxiliary switch to be turned off; and control the main switches of other switch components except the switch component to be turned off and the auxiliary switches to be turned on.

[0012] In a possible implementation, the switch assembly includes a switch relay, a first normally open contact of the switch relay is the main switch, and a normally closed contact of the switch relay is the auxiliary switch;

[0013] One end of the coil of the switch relay is connected to the output end of the controller, and the other end is grounded; for different switch components, the coil of the switch relay is connected to different output ends of the controller;

[0014] The controller is used to: when identifying the cable to be identified that is connected to the cable interface corresponding to the switch component, control the output end connected to the coil of the switch relay of the switch component to output a high level; and control the other output ends connected to the coils of the switch relays of other switch components except the switch component to output a low level.

[0015] In a possible implementation, the switch assembly further includes an indicator light;

[0016] One end of the indicator light is connected to a DC power supply via a second normally open contact of the switch relay, and the other end of the indicator light is grounded.

[0017] In a possible implementation, the switch assembly includes a main relay and an auxiliary relay; the first normally open contact of the main relay is the main switch, and the normally open contact of the auxiliary relay is the auxiliary switch;

[0018] One end of the coil of the main relay is connected to the first output end of the controller, and the other end is grounded; one end of the coil of the auxiliary relay is connected to the second output end of the controller, and the other end is grounded; for different switch components, the coil of the main relay is connected to different first output ends of the controller, and the coil of the auxiliary relay is connected to different second output ends of the controller;

[0019] The controller is used to: when identifying a cable to be identified that is connected to the cable interface corresponding to the switch component, control the first output terminal connected to the coil of the main relay of the switch component to output a high level, and control the other second output terminals connected to the coils of the auxiliary relays of other switch components except the switch component to output a high level; and control the second output terminal connected to the coil of the auxiliary relay of the switch component to output a low level, and control the other first output terminals connected to the coils of the main relays of other switch components except the switch component to output a low level.

[0020] In a possible implementation, the normally closed contact of the main relay is connected in series with the auxiliary switch; or

[0021] The normally closed contact of the auxiliary relay is connected in series with the main switch.

[0022] In a possible implementation, the switch assembly further includes an indicator light;

[0023] One end of the indicator light is connected to a DC power supply via a second normally open contact of the main relay, and the other end of the indicator light is grounded.

[0024] In a possible implementation, the cable identification device further includes: at least three remote control switches and remote control relays corresponding one to one to the remote control switches;

[0025] One end of the coil of the remote control relay is connected to a DC power supply through the corresponding remote control switch, and the other end of the coil of the remote control relay is grounded;

[0026] One end of the normally open contact of the remote control relay is connected to a DC power supply, and the other end is connected to an input end of the controller.

[0027] In a possible implementation, the switch control circuit further includes a detection switch and a grounding switch, and the cable interface includes a single cable interface;

[0028] One end of the detection switch is connected to the first electrode of the load power supply, and the other end of the detection switch is connected to the single cable interface;

[0029] One end of the grounding switch is connected to the second electrode of the load power supply, and the other end of the grounding switch is grounded;

[0030] The controller is used to control the detection switch and the grounding switch to be turned on when identifying the to-be-identified cable connected to the single cable interface.

[0031] In a possible implementation, the load power supply includes: a power regulator and a switching power supply;

[0032] The input end of the power regulator is used to connect to the AC power supply, and the output end of the power regulator is connected to the switch control circuit; the power regulator is used to convert the AC power into at least one detection current, and different detection currents have different current parameters, and the current parameters include at least one of frequency, amplitude, and phase;

[0033] The input end of the switching power supply is used to connect to the AC power supply, and the output end of the switching power supply is connected to the power supply end of the controller; the switching power supply is used to convert the AC power into the DC power required by the controller.

[0034] In the solution provided by the embodiment of the present invention, a detection current can be provided to the cable to be identified, and by identifying which cable has the current consistent with the detection current, it can be determined which cable is the cable to be identified, thereby realizing cable identification. The cable identification device can be used to identify cables without relying on human vision, touch, etc., and the cables can be identified quickly and accurately; and by using a controller to control whether to provide a detection current to the cable to be identified, not only can the load power supply be controlled to improve safety, but also the switch in the switch control circuit can be turned on and off to switch whether to supply power to the cable to be identified, and the cable identification can also be realized by switching whether the detection current in the cable is current or no current.

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 A first structural schematic diagram of a cable identification device provided by an embodiment of the present invention is shown;

[0038] Figure 2 A second structural schematic diagram of a cable identification device provided by an embodiment of the present invention is shown;

[0039] Figure 3 A third structural schematic diagram of the cable identification device provided by an embodiment of the present invention is shown;

[0040] Figure 4 A fourth structural schematic diagram of a cable identification device provided by an embodiment of the present invention is shown;

[0041] Figure 5A A fifth structural schematic diagram of a cable identification device provided in an embodiment of the present invention is shown;

[0042] Figure 5B A sixth structural schematic diagram of a cable identification device provided by an embodiment of the present invention is shown;

[0043] Figure 6 A seventh structural schematic diagram of a cable identification device provided in an embodiment of the present invention is shown;

[0044] Figure 7 A third structural schematic diagram of the cable identification device provided in an embodiment of the present invention is shown.

[0045] icon:

[0046] 10- load power supply, 20- controller, 30- switch control circuit, 40- cable interface, 41- single cable interface, 100- cable to be identified, 11- power regulator, 12- switching power supply, 13- power conversion switch. DETAILED DESCRIPTION

[0047] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0048] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] The cable identification device provided by the embodiment of the present invention can conveniently realize cable identification. Figure 1 As shown, the cable identification device includes: a load power supply 10, a controller 20, a switch control circuit 30 and a cable interface 40; the cable interface 40 is used to connect the cable 100 to be identified.

[0051] One end of the switch control circuit 30 is connected to the load power supply 10, and the other end is connected to the cable interface 40. The switch in the switch control circuit 30 is used to turn on or off the loop between the load power supply 10 and the cable interface 40; the load power supply 10 is connected to the controller 20 for supplying power to the controller 20; the controller 20 is used to control the on and off of the switch in the switch control circuit 30.

[0052] In an embodiment of the present invention, the cable identification device is used to provide a detection current to the cable 100 to be identified. Specifically, the load power supply 10 can provide a detection current for identifying the cable, and the detection current is generally an alternating current, and the detection current has the required current parameters such as frequency, amplitude, and phase. A switch control circuit 30 is connected in series between the load power supply 10 and the cable interface 40. The switch control circuit 30 includes at least one switch. Under the action of the controller 20, the on and off of the switch in the switch control circuit 30 can be controlled, so as to control the on and off of the loop between the load power supply 10 and the cable interface 40, and control the load power supply 10 to supply power to the cable interface 40, or not supply power, and then control whether to supply power to the cable 100 to be identified connected to the cable interface 40.

[0053] When a cable needs to be identified, the cable is used as a cable to be identified 100, and one end of the cable to be identified 100 is connected to the corresponding cable interface 40. The controller 20 controls the state of the switch in the switch control circuit 30, thereby transmitting the detection current provided by the load power supply 10 to the cable to be identified 100, thereby realizing the identification of the cable to be identified 100.

[0054] Specifically, when cable identification is required, at least one of the multiple cables is generally used as the cable 100 to be identified; since the two ends of the cable 100 to be identified are already determined, the cable identification device can provide a detection current to the cable 100 to be identified by connecting to one end of the cable 100 to be identified, and can identify the cable 100 to be identified from the multiple cables by detecting the current flowing through the multiple cables. For example, there are currently 20 longer cables, of which 5 cables are cables that need to be extracted and reused (the remaining 15 cables are still operating normally), and at this time, the 5 cables can all be used as cables 100 to be identified; based on the cable identification device provided in this embodiment, a detection current can be input into one of the cables 100 to be identified, and then other tools (such as Rogowski coils, etc.) can be used to detect the current of each of the 20 cables, and then the cable A that is consistent with the detection current can be identified from the 20 cables, and the cable A is the cable 100 to be identified connected to the cable identification device.

[0055] A cable identification device provided by an embodiment of the present invention can provide a detection current to a cable 100 to be identified. By identifying which cable has a current that is consistent with the detection current, it can be determined which cable is the cable 100 to be identified, thereby realizing cable identification. The cable identification device can be used to identify cables without relying on human vision, touch, etc., and the cables can be quickly and accurately identified; and by using the controller 20 to control whether to provide the detection current to the cable 100 to be identified, not only can the load power supply 10 be controlled to improve safety, but also the switch in the switch control circuit 20 can be turned on and off to switch whether to supply power to the cable 100 to be identified, and the cable identification can also be realized by switching whether the detection current in the cable has current or no current.

[0056] Optionally, since there may be multiple cables 100 to be identified, in order to facilitate identification of multiple cables 100 to be identified, see Figure 2 As shown, the switch control circuit 30 includes at least three switch components ( Figure 2 Only one switch assembly is schematically shown), and the cable interface 40 corresponds to the switch assembly one by one. Figure 2 An example in which three cable interfaces 40 are included is shown.

[0057] Among them, the switch component includes a main switch T1 and an auxiliary switch T2; one end of the main switch T1 is connected to the first electrode 1 of the load power supply 10, and one end of the auxiliary switch T2 is connected to the second electrode 2 of the load power supply 10; the other end of the main switch T1 and the other end of the auxiliary switch T2 are both connected to the corresponding cable interface 40 of the switch component.

[0058] The controller 20 is specifically used to: when identifying a cable to be identified that is connected to a cable interface 40 corresponding to a switch component, control the main switch T1 of the switch component to be turned on and the auxiliary switch T2 to be turned off; and control the main switch T1 of other switch components except the switch component to be turned off and the auxiliary switch T2 to be turned on.

[0059] In the embodiment of the present invention, since the cable 100 to be identified is generally a relatively long cable, the user performs identification at the middle position of the cable 100 to be identified, for example, by holding a Rogowski coil to perform cable identification. If the cable identification device can only identify one cable 100 to be identified at a time, when multiple cables 100 to be identified need to be identified, the user needs to first connect the cable identification device to one end of the cable 100 to be identified, then move to the middle position of the cable to be identified, then move to the cable identification device to replace the connected cable to be identified, and then move to the middle position of the cable to be identified; or, two users are required to work together, one user is located at the cable identification device to replace the connected cable 100 to be identified, and the other user is in the middle position of the cable to identify. The cable identification device provided in the embodiment of the present invention can simultaneously connect multiple cables 100 to be identified, so that one user can achieve identification by being located in the middle position of the cable without having to move back and forth.

[0060] In the embodiment of the present invention, the cable identification device includes at least three cable interfaces 40, which can simultaneously connect at least three cables 100 to be identified; and the switch control circuit 30 includes at least three switch components, and the switch components correspond to the cable interfaces 40 one by one. When multiple cables 100 to be identified need to be identified, one end of the multiple cables 100 to be identified is respectively connected to the corresponding cable interface 40, and the other ends of the multiple cables 100 to be identified are short-circuited. Figure 2As shown, if the cable identification device is connected to three cables 100a, 100b, and 100c to be identified at the same time, the three cables are respectively connected to different cable interfaces 40, and the other ends are connected to each other. When the cable 100a to be identified needs to be identified, the controller 20 controls the main switch T1 in the switch assembly connected to the identified cable 100a to be identified to be turned on, so that the load power supply 10 can provide a detection current to the cable 100a to be identified; and the auxiliary switch T2 of the other switch assembly connected to the cables 100b and 100c to be identified is turned on, so that the other cables 100b and 100c to be identified can be connected to the second electrode 2 of the load power supply 10. At this time, a loop is formed in which the cables 100b and 100c to be identified are connected in parallel and in series with the cable 100a to be identified. Due to the shunting effect of the cables 100b and 100c to be identified, the current of the cables 100b and 100c to be identified is less than the current of the cable 100a to be identified. Therefore, when detecting the current in multiple cables, the cable corresponding to the current with the same frequency and phase as the detected current and the largest amplitude is the cable to be identified 100a. Afterwards, the controller 20 can sequentially identify other cables to be identified 100b and 100c by controlling the conduction state of the main switch T1 and the auxiliary switch T2 in the switch assembly, thereby realizing the identification of multiple cables.

[0061] Optionally, the controller 20 is a PLC, which controls the switches in the switch assembly by controlling the coil of the relay. Figure 3 As shown, the switch assembly includes a switch relay, the first normally open contact of the switch relay (for example, K1-1) is the main switch, and the normally closed contact of the switch relay (for example, K1-2) is the auxiliary switch; one end of the coil of the switch relay (for example, K1) is connected to the output end of the controller 20, and the other end is grounded; for different switch assemblies, the coil of the switch relay is connected to different output ends of the controller 20.

[0062] The controller 20 is used to: when identifying a cable to be identified that is connected to a cable interface 40 corresponding to a switch component, control the output end connected to the coil of a switch relay of the switch component to output a high level; and control the other output ends connected to the coils of switch relays of other switch components except the switch component to output a low level.

[0063] In the embodiment of the present invention, for ease of understanding, the three switch components included in the switch control circuit 30 are respectively referred to as a first switch component, a second switch component, and a third switch component. Figure 3As shown, the first switch assembly includes a first switch relay, the first normally open contact K1-1 of the first switch relay is the main switch in the first switch assembly, and the normally closed contact K1-2 of the first switch relay is the auxiliary switch in the first switch assembly; one end of the coil K1 of the first switch relay is connected to the output end of the controller 20, and the other end is grounded. The second switch assembly includes a second switch relay, the first normally open contact K2-1 of the second switch relay is the main switch in the second switch assembly, and the normally closed contact K2-2 of the second switch relay is the auxiliary switch in the second switch assembly; one end of the coil K2 of the second switch relay is connected to the output end of the controller 20, and the other end is grounded. The third switch assembly includes a third switch relay, the first normally open contact K3-1 of the third switch relay is the main switch in the third switch assembly, and the normally closed contact K3-2 of the third switch relay is the auxiliary switch in the third switch assembly; one end of the coil K3 of the third switch relay is connected to the output end of the controller 20, and the other end is grounded. The coil K1 of the first switch relay, the coil K2 of the second switch relay, and the coil K3 of the third switch relay are connected to different output terminals of the controller 20 , that is, different coils are controlled by different output terminals.

[0064] In the embodiment of the present invention, each switch relay corresponds to a cable interface 40. When it is necessary to identify a cable 100 to be identified in a certain cable interface 40, the controller 20 controls the coil of the switch relay to be energized, and the coils of other switch relays are not energized. Figure 3 As shown, when it is necessary to identify the cable 100 to be identified connected to the cable interface 40 on the uppermost side of the figure, the cable interface 40 is connected to the first switch assembly, so the controller 20 controls the coil K1 of the first switch relay to be energized (i.e., output high level), and controls the coil K2 of the second switch relay and the coil K3 of the third switch relay to be de-energized (i.e., output low level). At this time, since K1 is energized, the normally open contact K1-1 is closed and the normally closed contact K1-2 is disconnected; and, K2 and K3 are not energized, so the normally open contacts K2-1 and K3-1 are both kept disconnected, and the normally closed contacts K2-2 and K3-2 are both kept closed. The first electrode 1 of the load power supply 10 is connected to a cable interface 40 through K1-1. Since the other ends of multiple cables 100 to be identified are short-circuited, they can pass through other cable interfaces 40 and return to the second electrode 2 of the load power supply 10 through K2-2 and K3-2 respectively, forming a detection loop.

[0065] When it is necessary to identify other cables 100 to be identified, the controller 20 controls the coil of the corresponding switch relay to be energized or de-energized. For example, when K2 is energized and K1 and K3 are de-energized, the cable 100 to be identified connected to the second switch component can be detected; when K3 is energized and K1 and K2 are de-energized, the cable 100 to be identified connected to the third switch component can be detected. When the switch control circuit includes more switch components (for example, 4, 5, etc.), the principle of realizing detection is similar to this, and will not be repeated here.

[0066] Optionally, the cable identification device includes a detection switch S1, which is arranged between the load power supply 10 and the switch control circuit 30. Since there are normally closed contacts (such as K1-2, K2-2, etc.) in the switch assembly, in order to improve safety, the detection switch S1 can be arranged between the second electrode 2 of the load power supply 10 and the switch assembly. Figure 3 As shown, since the detection current provided by the load power supply 10 is alternating current, the electrode corresponding to the neutral line (zero line) can be used as the second electrode 2, and the electrode corresponding to the power line (live line) can be used as the first electrode 1. At this time, there is no contact problem even if the normally closed contact is connected to the second electrode 2; and the detection switch S1 is set between the first electrode 1 and the switch assembly, which can also prevent the user from getting an electric shock due to accidentally touching the cable interface 40.

[0067] Alternatively, see Figure 3 As shown, the switch assembly also includes an indicator light (eg, L1); one end of the indicator light is connected to the DC power supply through the second normally open contact (eg, K1-3) of the switch relay, and the other end of the indicator light is grounded. Figure 3 The DC power supply is taken as an example of a 24V power supply.

[0068] In the embodiment of the present invention, Figure 3 As shown, the first switch assembly also includes a first indicator light L1, the second switch assembly also includes a second indicator light L2, and the third switch assembly also includes a third indicator light L3. Among them, the first indicator light L1 is connected in series with the second normally open contact K1-3 of the first switch relay, the second indicator light L2 is connected in series with the second normally open contact K2-3 of the second switch relay, and the third indicator light L3 is connected in series with the second normally open contact K3-3 of the third switch relay. When it is necessary to identify a certain cable 100 to be identified, only the coil of the corresponding switch relay is energized, so only one second normally open contact is closed, and the indicator light can be connected to a DC power supply, thereby lighting the indicator light. Based on the indicator light, it is convenient for the user to identify which cable 100 to be identified is currently being identified, and the working status of the cable identification device can be displayed to the user more clearly.

[0069] Or, alternatively, see Figure 4As shown, the switch assembly includes a main relay and an auxiliary relay; the first normally open contact of the main relay (for example, K11-1) is the main switch, and the normally open contact of the auxiliary relay (for example, K12-1) is the auxiliary switch. One end of the coil of the main relay (for example, K11) is connected to the first output end of the controller 20, and the other end is grounded; one end of the coil of the auxiliary relay (for example, K12) is connected to the second output end of the controller 20, and the other end is grounded; for different switch assemblies, the coil of the main relay is connected to different first output ends of the controller 20, and the coil of the auxiliary relay is connected to different second output ends of the controller 20; that is, one output end of the controller 20 controls only one coil.

[0070] The controller 20 is used to: when identifying a cable to be identified that is connected to a cable interface 40 corresponding to a switch component, control the first output terminal connected to the coil of a main relay of the switch component to output a high level, and control the other second output terminals connected to the coils of auxiliary relays of other switch components except the switch component to output a high level; and control the second output terminal connected to the coil of the auxiliary relay of the switch component to output a low level, and control the other first output terminals connected to the coils of the main relays of other switch components except the switch component to output a low level.

[0071] In the embodiment of the present invention, similarly, for ease of understanding, the three switch components included in the switch control circuit 30 are respectively referred to as a first switch component, a second switch component, and a third switch component. Figure 4 As shown, the first switch assembly includes a first main relay and a first auxiliary relay. The first normally open contact K11-1 of the first main relay is the main switch, and the normally open contact K12-1 of the first auxiliary relay is the auxiliary switch. One end of the coil K11 of the first main relay is connected to the first output terminal 11 of the controller 20, and the other end is grounded; one end of the coil K12 of the first auxiliary relay is connected to the second output terminal 12 of the controller 20, and the other end is grounded.

[0072] Similarly, the second switch assembly includes a second main relay and a second auxiliary relay. The first normally open contact K21-1 of the second main relay is the main switch, and the normally open contact K22-1 of the second auxiliary relay is the auxiliary switch. One end of the coil K21 of the second main relay is connected to the second output terminal 21 of the controller 20, and the other end is grounded; one end of the coil K22 of the second auxiliary relay is connected to the second output terminal 22 of the controller 20, and the other end is grounded.

[0073] The third switch assembly includes a third main relay and a third auxiliary relay. The first normally open contact K31-1 of the third main relay is the main switch, and the normally open contact K32-1 of the third auxiliary relay is the auxiliary switch. One end of the coil K31 of the third main relay is connected to the third output terminal 31 of the controller 20, and the other end is grounded; one end of the coil K32 of the third auxiliary relay is connected to the third output terminal 32 of the controller 20, and the other end is grounded.

[0074] In the embodiment of the present invention, each switch assembly corresponds to a cable interface 40. When it is necessary to identify a cable 100 to be identified in a certain cable interface 40, the controller 20 controls the coil of the main relay of the switch assembly corresponding to the cable interface 40 to be energized, and the coils of the auxiliary relays of other switch assemblies to be energized, so as to realize the identification of the cable 100 to be identified. Specifically, Figure 4 As shown, when it is necessary to identify the cable 100 to be identified connected to the cable interface 40 at the uppermost side of the figure, the cable interface 40 is connected to the first switch assembly; at this time, the controller 20 controls the coil K11 of the first main relay to be energized (i.e., outputs a high level), and controls the coil K22 of the second auxiliary relay and the coil K32 of the third auxiliary relay to be energized; and the controller 20 controls the coil K12 of the first auxiliary relay to be de-energized (i.e., outputs a low level), and controls the coil K21 of the second main relay and the coil K31 of the third main relay to be de-energized. At this time, since K11, K22, and K32 are energized, the normally open contacts K11-1, K22-1, and K32-1 are all closed; and K12, K21, and K31 are de-energized, so the normally open contacts K12-1, K21-1, and K31-1 are all kept open. At this time, the first electrode 1 of the load power supply 10 is connected to a cable interface 40 through K11-1. Since the other ends of the multiple cables 100 to be identified are short-circuited, they can pass through other cable interfaces 40 and return to the second electrode 2 of the load power supply 10 through K22-1 and K32-1 respectively, forming a detection loop.

[0075] When it is necessary to identify other cables 100 to be identified, the controller 20 controls the coils of the corresponding main and auxiliary relays to be energized or de-energized. For example, when K21, K12, and K32 are energized and K22, K11, and K31 are de-energized, the cables 100 to be identified connected to the second switch assembly can be detected; when K31, K12, and K22 are energized and K32, K11, and K21 are de-energized, the cables 100 to be identified connected to the third switch assembly can be detected. When the switch control circuit includes more switch assemblies (for example, 4, 5, etc.), the principle of realizing detection is similar to this, and will not be repeated here.

[0076] In the embodiment of the present invention, the controller can programmatically avoid the short circuit of the two electrodes of the load power supply 10 by controlling the power-on sequence of the main relay coil and the auxiliary relay coil. For example, power is supplied to the coil of the main relay only after the coil of the auxiliary relay loses power. In addition, the embodiment of the present invention can also physically avoid the short circuit of the two electrodes of the load power supply 10. Figure 5A As shown, in a switch assembly, the normally closed contact of the main relay (e.g., K11-2) is connected in series with the auxiliary switch (e.g., K12-1); or, as Figure 5B As shown, within a switch assembly, the normally closed contact of the auxiliary relay (e.g., K12-2) is connected in series with the main switch (e.g., K11-1).

[0077] See also Figure 5A As shown, taking the first switch component as an example, if the coil K12 of the first auxiliary relay is energized, K12-1 is closed; at this time, if the coil K11 of the first main relay is also energized, the normally closed contact K11-2 is disconnected, and the two electrodes of the load power supply 10 will not be directly short-circuited. Afterwards, if the coil K12 of the first auxiliary relay loses power, K12-1 is disconnected, and at this time, the two electrodes of the load power supply 10 will still not be short-circuited. Therefore, even if the coil of the auxiliary relay is energized, the coil of the main relay is energized, and there will be no problem of power short-circuiting. When the coil of the main relay is energized, the coil of the auxiliary relay is also energized, which is similar to the above analysis and will not be repeated here.

[0078] Similarly, see Figure 5B As shown, taking the first switch assembly as an example, if the coil K12 of the first auxiliary relay is energized, the normally closed contact K12-2 is disconnected; at this time, if the coil K11 of the first main relay is also energized, although the normally open contact K11-1 is closed, since K12-2 is disconnected, the two electrodes of the load power supply 10 will not be directly short-circuited. Afterwards, if the coil K12 of the first auxiliary relay loses power, K12-2 is closed, but the normally open contact K12-1 is disconnected, and at this time, the two electrodes of the load power supply 10 will still not be short-circuited, thereby achieving physical protection of the load power supply 10.

[0079] Alternatively, see Figure 5A and Figure 5B As shown, the switch assembly also includes an indicator light (eg, L1); one end of the indicator light is connected to the DC power supply through the second normally open contact of the main relay (eg, K11-3), and the other end of the indicator light is grounded.

[0080] In the embodiment of the present invention, Figure 5A and Figure 5BAs shown, the first switch assembly also includes a first indicator light L1, the second switch assembly also includes a second indicator light L2, and the third switch assembly also includes a third indicator light L3. Among them, the first indicator light L1 is connected in series with the second normally open contact K11-3 of the first main relay, the second indicator light L2 is connected in series with the second normally open contact K21-3 of the second main relay, and the third indicator light L3 is connected in series with the second normally open contact K31-3 of the third main relay. When it is necessary to identify a certain cable 100 to be identified, only the coil of the corresponding main relay is energized (the coils of the other main relays are all de-energized), so only one second normally open contact is closed, and the indicator light can be connected to a DC power supply, thereby lighting the indicator light. Based on the indicator light, it is convenient for the user to identify which cable 100 to be identified is currently being identified, and the working status of the cable identification device can be displayed to the user more clearly.

[0081] In the embodiment of the present invention, Figure 3 As shown, the switch assembly can realize the identification of multiple cables by using a switch relay, and the number of switch relays required is small, and the controller only needs to control a small number of relay coils, and the demand for the IO port of the controller is also low. When the relay coil is energized, although the normally open contact is closed and the normally closed contact is disconnected at the same time, due to the structure of the relay, the normally closed contact is generally disconnected first and then the normally open contact is closed, and there is a small time interval between the two, which generally does not cause the problem of short-circuiting the two electrodes of the load power supply 10.

[0082] like Figures 4 to 5B As shown, the switch component can also use a main relay and an auxiliary relay to realize the identification of multiple cables; although more relays are needed and more IO port resources of the controller are needed, the power-on sequence of the relay coils can be controlled by the program to avoid short circuits; and, the normally closed contacts of the main relay can be connected in series with the auxiliary switch, or the normally closed contacts of the auxiliary relay can be connected in series with the main switch to physically avoid short circuits, thereby realizing effective protection for the load power supply 10 and avoiding impact on the load power supply 10.

[0083] In addition, optionally, since it is necessary to control the controller 20 to switch the state of each switch in the switch assembly when identifying multiple cables, in order to facilitate a user to quickly identify multiple cables, the controller 20 can periodically switch the cable interface 40 to be detected. Alternatively, the cable identification device also has a remote control function, and the user can remotely control the controller 20 to achieve remote control operation of the switch control circuit 30. Figure 6As shown, the cable identification device also includes: at least three remote control switches (e.g., RC1) and remote control relays corresponding to the remote control switches; one end of the coil of the remote control relay (e.g., YJ1) is connected to the DC power supply through the corresponding remote control switch (e.g., RC1), and the other end of the coil of the remote control relay is grounded. One end of the normally open contact of the remote control relay (e.g., YJ1-1) is connected to the DC power supply, and the other end is connected to the input end of the controller 20.

[0084] In an embodiment of the present invention, the cable identification device further comprises a wireless receiving module, which can remotely receive a control signal and control which remote control switch is closed based on the control signal. Figure 6 As shown, the cable identification device at least includes a first remote control switch RC1, a second remote control switch RC2, a third remote control switch RC3, a first remote control relay, a second remote control relay and a third remote control relay, and the remote control switches correspond to the cable interface 40 one by one. For example, the first remote control switch RC1 corresponds to the cable interface of the first switch assembly. If it is currently necessary to detect the cable 100 to be identified connected to the first switch assembly, the user can send a wireless signal for closing the first remote control switch RC1 to the cable identification device; thereafter, the first remote control switch RC1 is closed, the coil YJ1 of the first remote control relay, and then the normally open contact YJ1-1 of the first remote control relay is closed, so that the identification signal of the cable 100 to be identified that is currently connected to the cable interface of the first switch assembly can be input to the controller 20, and the controller 20 can control the state of the corresponding switch in the switch assembly to realize cable identification. Similarly, by remotely controlling the coil YJ2 of the second remote control relay and the coil YJ3 of the third remote control relay, the identification of other cables 100 to be identified can also be realized.

[0085] For example, a handheld detection device can be configured, which includes a Rogowski coil, so that the current in the cable can be detected; and the detection device also has a wireless transmission module, which can transmit a signal of which remote control switch is closed to the cable identification device. When identifying multiple cables, the user can first connect multiple cables 100 to be identified to the corresponding cable interface 40 at one end of the cable, and then carry the detection device to the middle position of the cable. The cable to be identified by the cable identification device can be switched by remotely sending signals at the middle position of the cable, so that multiple cables can be easily and quickly identified, thereby improving the identification efficiency.

[0086] In addition, optionally, the wireless receiving module of the cable identification device has a transmitting function in addition to a receiving function, that is, it is a transceiver module; similarly, the wireless transmitting module in the detection device has a receiving function in addition to a transmitting function, that is, it is also a transceiver module. In an embodiment of the present invention, the wireless receiving module of the cable identification device can also send the current parameters of the current detection current to the wireless transmitting module of the detection device, and the detection device compares the current parameters of the detection current with the current parameters of the current in the currently identified cable to determine whether the currently identified cable is the cable to be identified. Specifically, if the frequencies and phases of the two currents are consistent, and the amplitude of the current in the currently identified cable is greater than the amplitude of the current with the same frequency and phase in other cables, then the currently identified cable can be considered to be the cable to be identified.

[0087] Furthermore, when identifying multiple cables, the currents of all cables can be detected during the first identification process, and then only the currents of cables with the same frequency and phase need to be detected. Specifically, when it is necessary to identify n cables among N cables (N≥n), that is, the number of cables 100 to be identified is n, one end of the n cables is connected to the n cable interfaces of the cable identification device respectively, and the other end of the n cables is grounded. The cable identification device provides a signal with a frequency of fs and a phase of When the user uses a handheld detection device to identify n cables to be identified, since it is not known which of the N cables are the cables to be identified, the detection device needs to be used to detect the current of all cables during the first identification process, that is, the current parameters of the current of the N cables need to be determined. The cable corresponding to the current is the initially determined cable to be identified (normally, the number of cables is n), and the cable corresponding to the current with the largest amplitude among the initially determined cables to be identified is the currently identified cable to be identified. Then, the controller 20 switches the state of the switch in the switch assembly to replace the currently identified cable to be identified. At this time, only the n initially determined cables to be identified need to be detected, and there is no need to re-detect all the N cables, which can further improve the detection efficiency.

[0088] Based on any of the above embodiments, the cable identification device can also identify a single cable. Figure 7 As shown, the switch control circuit 30 also includes a detection switch (e.g., K01-1) and a grounding switch (e.g., K02-1), and the cable interface 40 includes a single cable interface 41; one end of the detection switch is connected to the first electrode 1 of the load power supply 10, and the other end of the detection switch is connected to the single cable interface 41; one end of the grounding switch is connected to the second electrode 2 of the load power supply 10, and the other end of the grounding switch is grounded.

[0089] The controller 20 is used to control the detection switch and the grounding switch to be turned on when identifying the cable to be identified that is connected to the single cable interface 41 .

[0090] In the embodiment of the present invention, when detecting a single cable 100 to be identified, one end of the cable 100 to be identified is connected to the single cable interface 41, and the other end is grounded. Figure 7 As shown, the detection switch may be a normally open contact K01-1 of a detection relay, and the grounding switch may be a normally open contact K02-1 of a grounding relay (or, as described above, Figure 3 The switch assembly shown in FIG. 4 is similar to the switch assembly shown in FIG. 4 , and the grounding switch is a normally closed contact of the detection relay). The controller 20 can control the coil K01 of the detection relay and the coil K02 of the grounding relay to be energized or de-energized; when the single cable interface 41 needs to be identified, the controller 20 controls the coil K01 of the detection relay and the coil K02 of the grounding relay to be energized, so that K01-1 is closed and K02-1 is also closed; since the other end of the cable 100 to be identified is also grounded, a detection loop is formed by using the earth to detect the cable 100 to be identified.

[0091] Alternatively, if Figure 7 As shown, an indicator light L0 may be provided for the single cable interface 41, which is controlled by another normally open contact K01-3 of the detection relay. A remote control switch RC0 may also be provided for the single cable interface 41, which may control the coil YJ0 of the remote control relay, thereby closing the normally open contact YJ0-1 of the remote control relay, so that the controller 20 may identify the single cable interface 41.

[0092] Alternatively, see Figure 3 As shown, the load power supply 10 includes: a power regulator 11 and a switching power supply 12. The input end of the power regulator 11 is used to access the AC power supply, and the output end of the power regulator 11 is connected to the switch control circuit 30; the power regulator 11 is used to convert the AC power into at least one detection current, and different detection currents have different current parameters, and the current parameters include at least one of frequency, amplitude, and phase; the input end of the switching power supply 12 is used to access the AC power supply, and the output end of the switching power supply 12 is connected to the power supply end of the controller 20; the switching power supply 12 is used to convert the AC power into the DC power required by the controller 20.

[0093] In an embodiment of the present invention, the load power supply 10 is connected to an AC power supply, and a switching power supply 12 is used to convert the AC power provided by the AC power supply into the DC power required by the cable identification device, such as 24V DC power (i.e., DC24V); wherein the DC power supply connected to the indicator light, the coil of the remote control relay, etc. may be the DC power supply converted by the switching power supply 12, or may be other DC power supplies, which is not limited in this embodiment.

[0094] Moreover, when identifying cables, since there may be other cables in operation, there may also be current in these operating cables; for example, there are currently 20 cables, of which 5 need to be identified, and the other 15 are still in operation. During the identification process, it is not possible to distinguish which of the 20 cables are in operation and which are cables to be identified. In the embodiment of the present invention, the power regulator 11 has the function of adjusting the current parameters (frequency, amplitude, phase) of the output current, so that the detection current provided by the load power supply 10 can have different current parameters, or have current parameters different from the current in the traditional operating cable, so that the current in the cable to be identified and the current in the operating cable can be distinguished, and the cable to be identified can be accurately identified from multiple cables, avoiding the interference caused by the operating cable.

[0095] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technical solution that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A cable identification device, characterized in that: include: Load power supply, controller, switch control circuit and cable interface; The cable interface is used to access the cable to be identified; One end of the switch control circuit is connected to the load power supply, and the other end is connected to the cable interface, and the switch in the switch control circuit is used to turn on or off the loop between the load power supply and the cable interface; The load power supply is connected to the controller and is used to supply power to the controller; The controller is used to control the on and off of the switch in the switch control circuit; Wherein, the switch control circuit includes at least three switch components, and the cable interfaces correspond to the switch components one by one; the switch components include a main switch and an auxiliary switch; One end of the main switch is connected to the first electrode of the load power supply, and one end of the auxiliary switch is connected to the second electrode of the load power supply; the other end of the main switch and the other end of the auxiliary switch are both connected to the cable interface corresponding to the switch assembly; The controller is used to: when identifying a cable to be identified connected to the cable interface corresponding to the switch assembly, control the main switch of the switch assembly to be turned on and the auxiliary switch to be turned off; and control the main switches of other switch assemblies except the switch assembly to be turned off and the auxiliary switches to be turned on; The switch assembly includes a main relay and an auxiliary relay; the first normally open contact of the main relay is the main switch, and the normally open contact of the auxiliary relay is the auxiliary switch; One end of the coil of the main relay is connected to the first output end of the controller, and the other end is grounded; one end of the coil of the auxiliary relay is connected to the second output end of the controller, and the other end is grounded; for different switch components, the coil of the main relay is connected to different first output ends of the controller, and the coil of the auxiliary relay is connected to different second output ends of the controller; The controller is used to: when identifying a cable to be identified that is connected to the cable interface corresponding to the switch component, control the first output terminal connected to the coil of the main relay of the switch component to output a high level, and control the other second output terminals connected to the coils of the auxiliary relays of other switch components except the switch component to output a high level; and control the second output terminal connected to the coil of the auxiliary relay of the switch component to output a low level, and control the other first output terminals connected to the coils of the main relays of other switch components except the switch component to output a low level.

2. The cable identification device according to claim 1, characterized in that: The normally closed contact of the main relay is connected in series with the auxiliary switch; or The normally closed contact of the auxiliary relay is connected in series with the main switch.

3. The cable identification device according to claim 1, characterized in that: The switch assembly also includes an indicator light; One end of the indicator light is connected to a DC power supply via a second normally open contact of the main relay, and the other end of the indicator light is grounded.

4. The cable identification device according to claim 1, characterized in that: Also includes: At least three remote control switches and remote control relays corresponding to the remote control switches; One end of the coil of the remote control relay is connected to a DC power supply through the corresponding remote control switch, and the other end of the coil of the remote control relay is grounded; One end of the normally open contact of the remote control relay is connected to a DC power supply, and the other end is connected to an input end of the controller.

5. The cable identification device according to any one of claims 1 to 4, characterized in that: The switch control circuit further comprises a detection switch and a grounding switch, and the cable interface comprises a single cable interface; One end of the detection switch is connected to the first electrode of the load power supply, and the other end of the detection switch is connected to the single cable interface; One end of the grounding switch is connected to the second electrode of the load power supply, and the other end of the grounding switch is grounded; The controller is used to control the detection switch and the grounding switch to be turned on when identifying the to-be-identified cable connected to the single cable interface.

6. The cable identification device according to any one of claims 1 to 4, characterized in that: The load power supply comprises: a power regulator and a switching power supply; The input end of the power regulator is used to connect to the AC power supply, and the output end of the power regulator is connected to the switch control circuit; the power regulator is used to convert the AC power into at least one detection current, and different detection currents have different current parameters, and the current parameters include at least one of frequency, amplitude, and phase; The input end of the switching power supply is used to connect to an AC power supply, and the output end of the switching power supply is connected to a power supply end of the controller; the switching power supply is used to convert AC power into DC power required by the controller.

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