Cable anti-theft system

Abstract

The cable anti-theft system comprises an anti-theft head end, an anti-theft tail end and a monitoring platform. The anti-theft head end and the anti-theft tail end are connected to a monitoring cable. The anti-theft head end comprises a power line carrier sending module, a head end control module and a head end power supply module; the power line carrier sending module is used for sending a carrier signal to the monitoring cable; the anti-theft tail end comprises a power line carrier receiving module, a tail end control module, a wireless communication module and a tail end power supply module; the power line carrier receiving module is used for receiving a carrier signal transmitted by a monitoring cable; the tail end control module judges the on-off state of the cable according to the carrier signal receiving condition of the power carrier receiving module; the tail end control module is in communication connection with the monitoring platform through the wireless communication module; according to the invention, through canceling signal return, two-way communication of traditional power line carrier anti-theft is converted into one-way communication, and the problems of long cable anti-theft confirmation period and untimely reporting of cable loss in the existing two-way communication power line carrier anti-theft scheme are effectively solved.

Description

Technical Field

[0001] This application belongs to the field of cable anti-theft technology, and in particular relates to a cable anti-theft system. Background Technology

[0002] Power line carrier (PLC) anti-theft technology is a method of determining whether a cable has been stolen by transmitting commands through the cable. Current PLC anti-theft schemes involve the anti-theft head sending a command to the anti-theft tail, which then sends a corresponding response command back to the anti-theft head. If the anti-theft head does not receive the response command, it indicates that the cable is incomplete and has been stolen. Because this anti-theft scheme involves the sending and receiving of commands (i.e., bidirectional transmission), the command transmission time is relatively long, resulting in a long cable theft confirmation cycle and untimely reporting of cable loss. Utility Model Content

[0003] In view of the shortcomings of the prior art described above, the purpose of this application is to provide a cable anti-theft system to solve the technical problem of long confirmation cycle of existing cable anti-theft systems.

[0004] To achieve the above and other related objectives, this application provides a cable anti-theft system, comprising an anti-theft head end, an anti-theft end end, and a monitoring platform: the anti-theft head end and the anti-theft end end are connected to a monitoring cable; The anti-theft head unit includes: a power line carrier transmission module, a head unit control module, and a head unit power supply module; the power line carrier transmission module is used to send carrier signals to the monitoring cable, and the head unit power supply module is used to power each module; the anti-theft terminal unit includes: a power line carrier receiving module, a terminal control module, a wireless communication module, and a terminal power supply module; the power line carrier receiving module is used to receive carrier signals transmitted from the monitoring cable; the terminal control module determines the cable continuity based on the carrier signal reception status of the power line carrier receiving module; the terminal control module communicates with the monitoring platform through the wireless communication module. This application only needs to determine the cable continuity based on whether the anti-theft terminal receives the carrier signal sent by the anti-theft head unit. Compared to the traditional two-way signal transmission judgment scheme where the anti-theft head unit sends an inquiry command, the anti-theft terminal receives the inquiry command and sends back a response command, and the cable continuity is determined based on whether the anti-theft head unit receives the response command, this application's one-way signal transmission judgment scheme is faster and less susceptible to interference, ensuring the speed and stability of cable anti-theft judgment.

[0005] Preferably, there are multiple anti-theft terminals, and the multiple anti-theft terminals are spaced apart along the routing direction of the monitoring cable, so as to preliminarily determine the range of the monitoring cable disconnection and loss when the monitoring cable is disconnected.

[0006] Preferably, the head-end power module is connected to an external power source via a power interface to ensure the smooth transmission of the carrier signal.

[0007] Preferably, the terminal power module includes a battery, a power extraction circuit, a charging circuit, and a power switching circuit; the two input terminals of the power switching circuit are respectively connected to the output terminal of the power extraction circuit and the battery, and the input terminal of the power extraction circuit is connected to the cable; the charging circuit is located between the output terminal of the power extraction circuit and the battery. In this way, the anti-theft terminal can switch between cable power supply and battery power supply, ensuring normal operation whether the monitoring cable is energized or de-energized, thereby achieving anti-theft protection for both energized and de-energized monitoring cables.

[0008] Preferably, the anti-theft terminal is equipped with a cable loss alarm; the cable loss alarm includes an audible alarm and / or a photoelectric alarm to provide an alarm for cable loss.

[0009] Preferably, the anti-theft head is equipped with a cable power status indicator light, which is connected to the head control module and is used to indicate whether the cable is energized.

[0010] Preferably, the anti-theft head is communicatively connected to the monitoring platform; the anti-theft head is equipped with a cable loss indicator light, which is connected to the head control module.

[0011] Preferably, the wireless communication module is a GPRS module or an NB-IoT module.

[0012] Preferably, the monitoring platform has a time-sharing anti-theft setting function.

[0013] Preferably, the monitoring platform is wirelessly connected to the handheld terminal of the inspection personnel.

[0014] As described above, this application provides a cable anti-theft system that replaces the traditional bidirectional power line carrier anti-theft transmission with unidirectional transmission. This not only reduces signal transmission time but also lowers the risk of signal interference, improving the speed and accuracy of anti-theft detection. Furthermore, the anti-theft head of this cable anti-theft system is stably powered by an external power source, while the anti-theft end is equipped with both cable power supply and battery power supply modes. Thus, without the need for additional power cables, the cable anti-theft system can operate normally whether the monitoring cable is energized or de-energized, achieving both energized and de-energized anti-theft measures for the monitoring cable. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the cable anti-theft system in this application.

[0016] Figure 2 This is a schematic diagram of the structure of the anti-theft head end in one embodiment of this application.

[0017] Figure 3This is a schematic diagram of the anti-theft terminal in one embodiment of this application.

[0018] Figure 4 This is a schematic diagram of the structure of the end power module in one embodiment of this application.

[0019] Explanation of reference numerals in the attached figures:

[0020] Anti-theft head unit 100, head unit LN interface 110, power line carrier transmission module 120, head unit control module 130, head unit power supply module 140, power interface 141.

[0021] Anti-theft terminal 200, terminal LN interface 210, power line carrier receiver module 220, terminal control module 230, terminal power supply module 240.

[0022] Monitoring platform 300. Detailed Implementation

[0023] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0024] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "two" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0025] This application provides a cable anti-theft system, such as Figure 1 As shown, the cable anti-theft system includes an anti-theft head end 100, an anti-theft end 200, and a monitoring platform 300. The anti-theft head end 100 and the anti-theft end 200 are both connected to the monitoring cable, and the anti-theft head end 100 is preferably installed in a monitoring room such as a power distribution cabinet.

[0026] Specifically, such as Figure 2As shown, the anti-theft head unit 100 includes a power line carrier transmission module 120, a head unit control module 130, and a head unit power supply module 140. The power line carrier transmission module 120 is connected to the monitoring cable via a head unit LN interface 110. Thus, the head unit control module 130 can control the power line carrier transmission module 120 to periodically send carrier signals to the monitoring cable. The head unit power supply module 140 is used to power each module. In this embodiment, the power line carrier transmission module 120 sends carrier signals to the monitoring cable at 1-second intervals.

[0027] like Figure 3 As shown, the anti-theft terminal 200 includes a power line carrier receiving module 220, a terminal control module 230, a terminal power supply module 240, and a wireless communication module 250. The power line carrier receiving module 220 is connected to the monitoring cable via a terminal LN interface 210, allowing it to receive carrier signals from the monitoring cable. The terminal control module 230 is electrically connected to the power line carrier receiving module 220 to determine the continuity of the monitoring cable based on the carrier signal reception status (i.e., if the cable carrier receiving module 220 does not receive a carrier signal within a preset time (e.g., 30 seconds), it indicates that the monitoring cable is disconnected and lost; if the cable carrier receiving module 220 receives a carrier signal, it indicates that the monitoring cable is normal). The terminal control module 230 communicates with the monitoring platform 300 via a wireless communication module 250, such as a GPRS module or an NB-IoT module, to promptly upload a "cable lost" data packet to the monitoring platform 300 when the cable is lost. The terminal power supply module 240 supplies power to all modules.

[0028] Considering factors such as coverage, cost, and connectivity, in this embodiment, the wireless communication module 250 is preferably an NB-IoT module.

[0029] Since this application only needs to determine the continuity of the monitoring cable based on whether the anti-theft terminal 200 receives the carrier signal sent by the anti-theft head 100, compared with the traditional scheme where the anti-theft head 100 issues an inquiry command, the anti-theft terminal 200 receives the inquiry command and sends back a response command, and determines whether the monitoring cable is on or off based on whether the anti-theft head 100 receives the response command, this application eliminates the signal return, converting the traditional two-way communication of power line carrier anti-theft into one-way communication. This not only reduces the signal transmission time within a single cable anti-theft judgment cycle, but also reduces the risk of signal interference, improves the speed and stability of cable anti-theft monitoring, and effectively solves the problems of long cable anti-theft confirmation cycle and untimely reporting of cable loss in existing two-way communication power line carrier anti-theft schemes.

[0030] It should be noted that, in order to help users accurately determine the extent of the monitoring cable loss, such as Figure 1As shown, there are multiple anti-theft terminals 200, and the multiple anti-theft terminals 200 are spaced apart along the routing direction of the monitoring cable; in this embodiment, the farthest distance between the anti-theft head 100 and the anti-theft terminal 200 is no more than 3km, so as to meet the farthest communication requirements of narrowband power line carrier.

[0031] In a preferred embodiment, such as Figure 2 As shown, the head power module 140 of the anti-theft head terminal 100 has a power interface 141 that connects to an external power source. The power interface 141 is a pluggable interface, and the external power source is provided by the monitoring room. In this way, the external power source of the monitoring room can be used to provide stable power to the anti-theft head terminal 100.

[0032] Furthermore, the head-end power module 140 includes a transformer to regulate the voltage of the external power supply to the operating voltage of the anti-theft head-end 100, ensuring the normal operation of the anti-theft head-end 100. In this embodiment, the voltage range provided by the external power supply is DC12~24V.

[0033] To meet the power supply requirements of the anti-theft terminal 200, the terminal power module 240 of the anti-theft terminal 200 includes, but is not limited to, the following embodiments.

[0034] Example 1

[0035] The terminal power module 240 includes a battery that supplies power to each module of the anti-theft terminal.

[0036] Example 2

[0037] The terminal power module 240 includes a power supply circuit connected to the monitoring cable, so that the monitoring cable can supply power to each module of the anti-theft terminal.

[0038] The power supply circuit can use either a voltage transformer or a current transformer as the power supply element; there is no limitation on which one is used, as long as it can obtain power from the monitoring cable.

[0039] Example 3

[0040] The terminal power module 240 includes a battery, a power extraction circuit, and a power switching circuit. The two input terminals of the power switching circuit are connected to the output terminal of the power extraction circuit and the battery, respectively, and the input terminal of the power extraction circuit is connected to the monitoring cable. In this way, the power switching circuit can be used to switch between battery power supply and monitoring cable power supply.

[0041] It should be noted that the power supply circuit can use either a voltage transformer or a current transformer as the power supply element; there is no limitation on this, as long as it can obtain power from the monitoring cable.

[0042] Since the battery is DC powered, while the monitoring cable operates on AC 90V~305V, the power switching circuit includes a relay and a switching power supply to convert the AC power from the monitoring cable to DC power. Thus, when the monitoring cable is de-energized, the relay stops working due to the disconnection of the power supply, and the relay connects to the battery, entering battery-powered mode. When the monitoring cable is energized, the relay activates due to the connection of the power supply, disconnecting the battery and automatically entering monitoring cable-powered mode. This allows for automatic switching between battery-powered and monitoring cable-powered modes, ensuring the anti-theft terminal 200 operates normally regardless of whether the monitoring cable is energized or de-energized, thereby achieving both energized and de-energized anti-theft monitoring.

[0043] Furthermore, a charging circuit is provided between the output terminal of the power supply circuit and the battery so that the battery can be charged when the monitoring cable is energized.

[0044] It should be noted that the charging circuit can be any existing circuit capable of controlling battery charging, and this will not be elaborated further.

[0045] In this embodiment, in order to realize the monitoring of the cable for both live and non-live theft prevention, the structure of the terminal power module 240 of the monitoring terminal 200 preferably adopts the structure of the above embodiment 3. At this time, the terminal control module 230 will also automatically report the battery status information such as the current battery power, the battery entering charging mode, and the battery entering discharging mode to the monitoring platform 300 through the wireless communication module 250.

[0046] In addition, to provide on-site alarms when monitoring cables are lost, a cable loss alert device (not shown in the figure) can be installed on the anti-theft terminal 200; the cable loss alert device includes an audible alert and / or a photoelectric alert.

[0047] In a preferred embodiment, such as Figure 1 As shown, the anti-theft camera 100 communicates with the monitoring platform 300 via communication protocols such as RS485 or RS232, so that the monitoring platform 300 can monitor and manage the anti-theft camera 100 by accessing its internal data such as operating status and fault information and writing addresses. In this embodiment, the monitoring platform 300 is located in a monitoring room.

[0048] To facilitate the maintenance and installation of the monitoring head unit 100, the monitoring head unit 100 is installed in the monitoring room via a guide rail.

[0049] Optionally, the anti-theft head unit 100 is equipped with a cable loss indicator light, which is connected to the head unit control module 130 so that when the cable is lost, the cable loss indicator light will light up to remind the personnel in the monitoring room to deal with it in time.

[0050] Optionally, the anti-theft head end 100 is equipped with a cable power status indicator light, which is connected to the head end control module 130 so that the cable power status indicator light is turned off when the cable is de-energized.

[0051] Furthermore, the monitoring platform 300 is wirelessly connected to the handheld terminal (such as a mobile phone) of the inspection personnel, so that the monitoring platform 300 can push information such as cable loss or anti-theft terminal 200 abnormality to the handheld terminal of the inspection personnel via SMS or pop-up window to remind the inspection personnel to check in time.

[0052] In a preferred embodiment, the monitoring platform 300 has a time-sharing anti-theft setting function, that is, the monitoring platform 300 can set the anti-theft time so that the cable anti-theft system has an anti-theft alert mode and an anti-theft silent mode. During the anti-theft time, the cable anti-theft system is in the anti-theft alert mode, and a loss alarm will be triggered when the monitored cable is lost; outside the anti-theft time, the cable anti-theft system is in the anti-theft silent mode, and when the monitored cable is lost, the monitoring platform 300 only records the loss and does not trigger a loss alarm, so as to appropriately reduce the workload of the cable anti-theft system and achieve the purpose of saving power and other resources.

[0053] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0054] In summary, the cable anti-theft system provided in this application, by eliminating signal feedback, converts the two-way communication of traditional power line carrier anti-theft into one-way communication. This not only reduces the signal transmission time within a single cable anti-theft judgment cycle but also lowers the risk of signal interference, improving the speed and stability of cable anti-theft monitoring. It effectively solves the problems of long cable anti-theft confirmation cycles and untimely cable loss reporting in existing two-way communication power line carrier anti-theft schemes. Furthermore, the anti-theft terminal 200 involved in this application has two power supply modes: monitoring cable power supply and battery power supply. This ensures that the anti-theft terminal 200 can operate normally whether the monitoring cable is energized or de-energized, thus achieving both energized and de-energized anti-theft monitoring of the monitoring cable without the need for additional cable installation.

[0055] Therefore, this application effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0056] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.

Claims

1. A cable anti-theft system, comprising an anti-theft head end, an anti-theft end end, and a monitoring platform: the anti-theft head end and the anti-theft end end are connected to a monitoring cable; characterized in that, The anti-theft head unit includes: a power line carrier transmission module, a head unit control module, and a head unit power supply module; the power line carrier transmission module is used to periodically send carrier signals to the monitoring cable, and the head unit power supply module is used to supply power to each module. The anti-theft terminal includes: a power line carrier receiving module, a terminal control module, a wireless communication module, and a terminal power supply module; the power line carrier receiving module is used to receive carrier signals transmitted from the monitoring cable; the terminal control module determines the continuity of the monitoring cable based on the carrier signal reception status of the power line carrier receiving module within a preset time period; the terminal control module communicates with the monitoring platform through the wireless communication module. There are multiple anti-theft terminals, and these terminals are spaced apart along the routing direction of the monitoring cable.

2. A cable security system according to claim 1, characterised in that, The head-end power module is connected to an external power source via a power interface.

3. The cable theft prevention system of claim 1, wherein, The terminal power module includes a battery, a power extraction circuit, a charging circuit, and a power switching circuit; the two input terminals of the power switching circuit are respectively connected to the output terminal of the power extraction circuit and the battery, and the input terminal of the power extraction circuit is connected to the monitoring cable; the charging circuit is located between the output terminal of the power extraction circuit and the battery.

4. The cable security system of claim 1, wherein, The anti-theft terminal is equipped with a cable loss reminder; the cable loss reminder includes an audible reminder and / or a photoelectric reminder.

5. The cable security system of claim 1, wherein, The anti-theft head is equipped with a cable power status indicator light, which is connected to the head control module.

6. The cable security system of claim 1, wherein, The anti-theft head unit is communicatively connected to the monitoring platform; the anti-theft head unit is equipped with a cable loss indicator light, which is connected to the head unit control module.

7. The cable security system of claim 1, wherein, The wireless communication module is a GPRS module or an NB-IoT module.

8. The cable security system of claim 1, wherein, The monitoring platform has a time-based anti-theft setting function.

9. The cable security system of claim 1, wherein, The monitoring platform is wirelessly connected to the handheld terminal of the inspection personnel.

Images