A self-organizing network underground cable anti-external damage alarm method, device and system

Abstract

The present invention provides a self-organizing network underground cable anti-external damage alarm method, device and system, the device includes a control module and a vibration sensor, a microphone, a Lora wireless communication module and an alarm module connected to the control module; the vibration sensor is used to detect the vibration signal generated when heavy machinery around the underground cable is under construction; the microphone is used to detect the sound signal generated when heavy machinery around the underground cable is under construction; the Lora wireless communication module is used for networking and mutual information transmission between adjacent underground cable anti-external damage alarm devices; the control module is used to perform a comprehensive analysis of the vibration signal and the sound signal to determine whether an alarm is required; the alarm module is used to receive the command of the control module to give a buzzer alarm. The present invention can jointly identify external damage events, thereby improving the accuracy of the judgment.

Description

Technical Field

[0001] The present invention relates to the technical field of cable safety protection, and in particular to a method, device and system for preventing underground cables from breaking externally in a self-organizing network. Background Art

[0002] Compared with overhead lines, underground high-voltage cables can not only effectively improve the utilization rate and aesthetics of urban land, but also enhance the reliability and transmission capacity of urban power grids. Therefore, the application rate of underground high-voltage cables in cities has been increasing in recent years. However, since the cables are buried underground, they are easily damaged by external construction projects such as municipal engineering. Once the underground high-voltage cables are damaged, it will not only cause large-scale power outages, but also may cause risks such as electric shock. Therefore, the prevention of external damage to underground high-voltage cables is one of the important guarantees for the safe operation of the power grid.

[0003] Currently common anti-external damage devices are usually single devices that operate independently. On the one hand, this can easily lead to false alarms; on the other hand, when the device itself loses power or fails, it is difficult to detect in time. Summary of the invention

[0004] To solve the above problems, the present invention provides a self-organizing underground cable anti-external damage alarm method, device and system. The system is composed of a plurality of identical underground cable anti-external damage alarm devices. These underground cable anti-external damage alarm devices can automatically form a network and jointly judge external damage events, thereby improving the accuracy of the judgment.

[0005] An underground cable anti-break alarm device of a self-organizing network includes: a control module and a vibration sensor, a pickup, a Lora wireless communication module and an alarm module connected to the control module;

[0006] The vibration sensor is used to detect vibration signals generated by heavy machinery during construction around underground cables;

[0007] The pickup is used to detect the sound signal generated by heavy machinery construction around the underground cable;

[0008] The Lora wireless communication module is used for networking and mutual information transmission between adjacent underground cable anti-breakage alarm devices;

[0009] The control module is used to package the vibration signal received by the vibration sensor of the local underground cable anti-breakage alarm device and the sound signal received by the microphone, and send them to the adjacent anti-breakage alarm device through the Lora wireless communication module; it is also used to receive the vibration signal and sound signal sent by the adjacent underground cable anti-breakage alarm device, conduct a comprehensive analysis of the vibration signal and the sound signal, and determine whether an alarm is required;

[0010] The alarm module is used to receive instructions from the control module to issue a buzzer alarm.

[0011] Furthermore, it also includes a 4G communication module connected to the control module, which is used to communicate with the back-end operation and maintenance management platform.

[0012] Furthermore, the 4G communication module is configured with an underground cable anti-external damage alarm device every 10.

[0013] An underground cable anti-breakage alarm system of a self-organizing network, comprising a plurality of underground cable anti-breakage alarm devices as described above and a back-end operation and maintenance management platform that is communicatively connected to the underground cable anti-breakage alarm devices;

[0014] The back-end operation and maintenance management platform is used to send configuration information to the underground cable anti-external damage alarm device, receive alarm information uploaded by the underground cable anti-external damage alarm device, display the alarm information in real time on the interface of the back-end operation and maintenance management platform, and notify relevant responsible persons through wireless communication.

[0015] Furthermore, the backend operation and maintenance management platform includes a control submodule and a map management submodule, a communication submodule, a human-computer interaction submodule and an alarm notification submodule connected to the control submodule;

[0016] The map management submodule is used to set the coordinate position of the underground cable anti-external damage alarm device and display the geographical information of the underground cable and the underground cable anti-external damage alarm device;

[0017] The control submodule is the core module of the backend operation and maintenance management platform, which realizes the overall business and data processing of the backend operation and maintenance management platform by controlling other submodules;

[0018] The communication submodule is used to exchange data with various underground cable anti-breakage alarm devices;

[0019] The human-computer interaction submodule is used to configure the display of relevant data and alarm information;

[0020] The alarm notification submodule is used to notify relevant responsible persons via SMS.

[0021] A method for preventing underground cables from breaking externally in a self-organizing network is provided, which is implemented by using the above-mentioned underground cable prevention alarm system for the self-organizing network. The method comprises the following steps:

[0022] Step 1: Arrange underground cable external damage prevention alarms at equal intervals on the ground surface above the underground cable tunnel;

[0023] Step 2: After the underground cable protection alarm is powered on, the underground cable protection alarm equipped with a 4G communication module automatically becomes the master node, and forms a network with the nearby underground cable protection alarms that are not equipped with a 4G communication module through LORA;

[0024] Step 3: The master node uploads the networking status to the backend operation and maintenance management platform;

[0025] Step 4: In the map management submodule of the back-end operation and maintenance management platform, enter the location of each underground cable damage prevention alarm;

[0026] Step 5: The back-end operation and maintenance management platform sends the location information of the underground cable protection alarm to the corresponding underground cable protection alarm through each master node. Each underground cable protection alarm S i Only the 4 nodes above and below it are recorded. i-2 , S i-1 , S i+1 , S i+2 )’s location;

[0027] Step 6: When the vibration signal received by the vibration sensor in the underground cable anti-break alarm exceeds the first threshold M 1 Or the audio signal received by the microphone exceeds the second threshold M 2 When the alarm is detected, the alarm judgment program is started to make a judgment;

[0028] Step 7: If the judgment result is that an alarm is required, the alarm module of the underground cable anti-external damage alarm device is activated to alarm, and the alarm information is notified to the main node through the LORA communication module;

[0029] Step 8: The master node sends the alarm information to the backend operation and maintenance management platform;

[0030] Step 9: The backend operation and maintenance management platform displays the alarm information based on the map and notifies the relevant responsible persons through the alarm notification submodule.

[0031] Furthermore, in step one, underground cable external damage prevention alarms are evenly arranged on both sides of the underground cable tunnel.

[0032] Furthermore, step six specifically includes:

[0033] Step (1) convert the current vibration signal Z i (t) and the pickup value Y i (t) Transmit to four adjacent underground cable external damage alarms (S i-2 , S i-1 , S i+1 , S i+2 ), and activate the adjacent underground cable anti-breakage alarm to actively transmit its current vibration signal and pickup value;

[0034] Step (2) receiving the adjacent underground cable anti-breakage alarm and transmitting back its current vibration signal and pickup value;

[0035] Step (3) makes a judgment based on the vibration signal collected by the vibration sensor of the local underground cable anti-external damage alarm and the adjacent underground cable anti-external damage alarm and the sound wave signal value collected by the microphone.

[0036] Furthermore, the specific determination method of step (3) is:

[0037] (3.1) Adjust and correct the vibration signal based on the sound wave signal:

[0038] Z i-1 '(t)=Z i-1 (t)*Y i-1 (t)*Y i (0) / (Y i-1 (0)*Y i (t))

[0039] Z i - 2 '(t)=Z i-2 (t)*Y i-2 (t)*Y i (0) / (Y i-2 (0)*Y i (t))

[0040] Z i+1 '(t)=Z i+1 (t)*Y i+1 (t)*Y i (0) / (Y i+1 (0)*Y i (t))

[0041] Z i+2 '(t)=Z i+2 (t)*Y i+2 (t)*Y i (0) / (Y i+2 (0)*Y i (t))

[0042] Among them, Y i (0) indicates the underground cable anti-break alarm device S when there is no noise i The value of the base audio signal of the middle pickup;

[0043] (3.2) Determine the current vibration amount Z'(t) = Z i '(t)+k i-1 *Z i-1 '(t) / d i-12 +k i - 2 *Z i-2 '(t) / d i-2 2 +k i+1 *Z i+1 '(t) / d i-1 2 +k i+2 *Z i+2 '(t) / d i+2 2 Whether it exceeds the instantaneous vibration threshold M t ; Wherein, d is the distance from the adjacent underground cable anti-breakage alarm device to the current anti-breakage alarm device, and k is an adjustment factor related to the stratum structure, which is directly selected between 0.5 and 5 based on experience; when Z'(t)>M t When Z'(t)≤M t When , jump to step (3.3);

[0044] (3.3) Determine whether the cumulative vibration amount Z″(t) exceeds the cumulative vibration threshold M 1 .

[0045]

[0046] When Z″(t)>M 1 When an alarm is issued.

[0047] The present invention has the following beneficial effects:

[0048] The present invention provides a self-organizing underground cable anti-external breakage alarm method, device and system. The system consists of a plurality of identical underground cable anti-external breakage alarm devices. These underground cable anti-external breakage alarm devices can automatically form a network and jointly judge external breakage events. At the same time, whether the instantaneous vibration exceeds the threshold and whether the cumulative vibration exceeds the threshold (because the vibration generated by large-scale mechanical construction is accumulative at the same frequency) is considered, thereby improving the accuracy of the judgment. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a structural schematic diagram of an underground cable external damage prevention alarm device of a self-organizing network according to an embodiment of the present invention;

[0050] Figure 2 A schematic diagram of the structure of an underground cable anti-breakage alarm system in a self-organizing network according to an embodiment of the present invention;

[0051] Figure 3 A schematic diagram of the deployment of an underground cable external damage prevention alarm device in an ad hoc network according to an embodiment of the present invention;

[0052] Figure 4A flow chart of an underground cable anti-breakage alarm method in a self-organizing network according to an embodiment of the present invention. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] See also Figure 1 The embodiment of the present invention provides an underground cable anti-external damage alarm device of a self-organizing network, including: a control module and a vibration sensor, a microphone, a Lora wireless communication module and an alarm module connected to the control module.

[0055] The vibration sensor is used to detect vibration signals generated by heavy machinery during construction around underground cables;

[0056] The pickup is used to detect the sound signal generated by heavy machinery construction around the underground cable;

[0057] The Lora wireless communication module is used for networking and mutual information transmission between adjacent underground cable anti-breakage alarm devices;

[0058] The control module is used to package the vibration signal received by the vibration sensor of the local underground cable anti-breakage alarm device and the sound signal received by the microphone, and send them to the adjacent anti-breakage alarm device through the Lora wireless communication module; it is also used to receive the vibration signal and sound signal sent by the adjacent underground cable anti-breakage alarm device, conduct a comprehensive analysis of the vibration signal and the sound signal, and determine whether an alarm is required;

[0059] The alarm module is used to receive instructions from the control module to issue a buzzer alarm.

[0060] Optionally, the embodiment of the present invention may further include a 4G communication module connected to the control module for communicating with the back-end operation and maintenance management platform. The 4G communication module is configured at intervals of about 10 underground cable anti-external damage alarm devices.

[0061] See also Figure 2 The embodiment of the present invention also provides an underground cable anti-breakage alarm system for a self-organizing network, including a plurality of underground cable anti-breakage alarm devices as described above and a back-end operation and maintenance management platform that is communicatively connected to the underground cable anti-breakage alarm devices.

[0062] The back-end operation and maintenance management platform is used to send configuration information to the underground cable anti-external damage alarm device, receive alarm information uploaded by the underground cable anti-external damage alarm device, display the alarm information in real time on the interface of the back-end operation and maintenance management platform, and notify relevant responsible persons through wireless communication.

[0063] Specifically, Figure 2 As shown, the backend operation and maintenance management platform includes a control submodule and a map management submodule, a communication submodule, a human-computer interaction submodule and an alarm notification submodule connected to the control submodule.

[0064] The map management submodule is used to set the coordinate position of the underground cable anti-external damage alarm device and display the geographical information of the underground cable and the underground cable anti-external damage alarm device;

[0065] The control submodule is the core module of the backend operation and maintenance management platform, which realizes the overall business and data processing of the backend operation and maintenance management platform by controlling other submodules;

[0066] The communication submodule is used to exchange data with various underground cable anti-breakage alarm devices;

[0067] The human-computer interaction submodule is used to configure the display of relevant data and alarm information;

[0068] The alarm notification submodule is used to notify relevant responsible persons through wireless means such as text messages.

[0069] like Figure 3 and Figure 4 As shown, the embodiment of the present invention also provides an underground cable anti-break alarm method for a self-organizing network, comprising the following steps:

[0070] Step 1: Figure 3 As shown, underground cable anti-external breakage alarms are arranged at equal intervals on the ground surface above the underground cable tunnel. Preferably, the underground cable anti-external breakage alarms can be evenly arranged on both sides of the underground cable tunnel. Preferably, a 4G communication module can be selected for every 10 or so external breakage alarm devices.

[0071] Step 2: After the underground cable protection alarm is powered on, the underground cable protection alarm equipped with a 4G communication module automatically becomes the master node, and is networked with nearby underground cable protection alarms that are not equipped with a 4G communication module through LORA.

[0072] Step 3: The master node uploads the networking status to the backend operation and maintenance management platform.

[0073] Step 4: In the map management submodule of the back-end operation and maintenance management platform, enter the locations of underground cable damage prevention alarms.

[0074] Step 5: The back-end operation and maintenance management platform sends the location information of the underground cable protection alarm to the corresponding underground cable protection alarm through each master node. i Only the 4 nodes above and below it are recorded. i-2 , S i-1 , S i+1 , S i+2 )’s location.

[0075] Step 6: When the vibration signal received by the vibration sensor in the underground cable anti-break alarm exceeds the first threshold M 1 Or the audio signal received by the microphone exceeds the second threshold M 2 When the alarm is detected, the alarm judgment program is started for judgment. Specifically, it includes:

[0076] (1) The current vibration signal Z i (t) and the pickup value Y i (t) Transmit to four adjacent underground cable external damage alarms (S i-2 , S i-1 , S i+1 , S i+2 ), and activate the adjacent underground cable anti-breakage alarm to actively transmit its current vibration signal and pickup value;

[0077] (2) Receive the adjacent underground cable anti-breakage alarm and transmit its current vibration signal and pickup value;

[0078] (3) The judgment is made based on the vibration signals collected by the vibration sensors of the local underground cable anti-breakage alarm and the adjacent underground cable anti-breakage alarm and the sound wave signals collected by the microphone. The specific judgment method is as follows:

[0079] (3.1) Adjust and correct the vibration signal based on the sound wave signal:

[0080] Z i-1 '(t)=Z i-1 (t)*Y i-1 (t)*Y i (0) / (Y i-1 (0)*Y i (t))

[0081] Z i - 2 '(t)=Z i-2 (t)*Y i-2 (t)*Y i (0) / (Y i-2 (0)*Y i (t))

[0082] Z i+1'(t)=Z i+1 (t)*Y i+1 (t)*Y i (0) / (Y i+1 (0)*Y i (t))

[0083] Z i+2 '(t)=Z i+2 (t)*Y i+2 (t)*Y i (0) / (Y i+2 (0)*Y i (t))

[0084] Among them, Y i (0) indicates the underground cable anti-break alarm device S when there is no noise i The value of the base audio signal of the center pickup.

[0085] (3.2) Determine the current vibration amount Z'(t) = Z i '(t)+k i-1 *Z i-1 '(t) / d i-1 2 +k i-2 *Z i-2 '(t) / d i-2 2 +k i+1 *Z i+1 '(t) / d i-1 2 +k i+2 *Z i+2 '(t) / d i+2 2 Whether it exceeds the instantaneous vibration threshold M t Among them, d is the distance from the adjacent underground cable anti-breakage alarm device to the current anti-breakage alarm device, and k is an adjustment factor related to the stratum structure, which can be directly selected between 0.5 and 5 based on experience. When Z'(t)>M t When Z'(t)≤M t , jump to step (3.3).

[0086] (3.3) Determine whether the cumulative vibration amount Z"(t) exceeds the cumulative vibration threshold M l .

[0087]

[0088] When Z"(t)>M l When an alarm is issued.

[0089] Step 7: If the judgment result is that an alarm is needed, the alarm module of the underground cable anti-external damage alarm device is activated to alarm, and the alarm information is notified to the main node through the LORA communication module.

[0090] Step 8: The master node sends the alarm information to the backend operation and maintenance management platform.

[0091] Step 9: The backend operation and maintenance management platform displays the alarm information based on the map and notifies the relevant responsible persons through the alarm notification submodule.

[0092] The embodiments of the present invention have the following advantages:

[0093] (1) The propagation of vibration signals is easily affected by the complexity of underground geology, which can easily lead to misjudgment. Since the sound wave signal is propagated in the air, the vibration signal is adjusted and corrected by the sound wave signal, which effectively solves the interference of the complexity of underground geology on the transmission of vibration signals.

[0094] (2) As shown in the formula in step (3.2), by comprehensively considering the values ​​of multiple adjacent sensors to make judgments, it is possible to effectively reduce the misjudgment caused by the influence of the signal noise received by a single sensor.

[0095] (3) The present invention also considers whether the instantaneous vibration exceeds the threshold and whether the cumulative vibration exceeds the threshold (because the vibration generated by large-scale mechanical construction is cumulative at the same frequency), further improving the accuracy of recognition.

[0096] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions 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 should be based on the protection scope of the claims.

Claims

1. An underground cable anti-breakage alarm device for a self-organizing network, characterized in that: It includes a control module and a vibration sensor, a microphone, a Lora wireless communication module and an alarm module connected to the control module; The vibration sensor is used to detect vibration signals generated by heavy machinery during construction around underground cables; The microphone is used to detect the sound signal generated by heavy machinery during construction around the underground cable; The Lora wireless communication module is used for networking and mutual information transmission between adjacent underground cable anti-breakage alarm devices; The control module is used to package the vibration signal received by the vibration sensor of the local underground cable anti-breakage alarm device and the sound signal received by the microphone, and send them to the adjacent anti-breakage alarm device through the Lora wireless communication module; It is also used to receive the vibration signal and sound signal sent by the nearby underground cable anti-break alarm device, conduct a comprehensive analysis of the vibration signal and sound signal, and determine whether an alarm is needed; The alarm module is used to receive instructions from the control module to issue a buzzer alarm.

2. The underground cable anti-breakage alarm device of the ad hoc network as claimed in claim 1, characterized in that: It also includes a 4G communication module connected to the control module for communicating with the back-end operation and maintenance management platform.

3. The underground cable anti-breakage alarm device for a self-organizing network as claimed in claim 1, characterized in that: The 4G communication module is configured with 10 underground cable anti-external damage alarm devices at intervals.

4. A self-organizing network underground cable anti-external damage alarm system, characterized by: It comprises a plurality of underground cable anti-external breakage alarm devices as described in any one of claims 1 to 3 and a back-end operation and maintenance management platform that is communicatively connected to the underground cable anti-external breakage alarm devices; The back-end operation and maintenance management platform is used to send configuration information to the underground cable anti-external damage alarm device, receive alarm information uploaded by the underground cable anti-external damage alarm device, display the alarm information in real time on the interface of the back-end operation and maintenance management platform, and notify relevant responsible persons through wireless communication.

5. The underground cable anti-breakage alarm system of the ad hoc network as claimed in claim 4, characterized in that: The back-end operation and maintenance management platform includes a control submodule and a map management submodule, a communication submodule, a human-computer interaction submodule and an alarm notification submodule connected to the control submodule; The map management submodule is used to set the coordinate position of the underground cable anti-external damage alarm device and display the geographical information of the underground cable and the underground cable anti-external damage alarm device; The control submodule is the core module of the backend operation and maintenance management platform, which realizes the overall business and data processing of the backend operation and maintenance management platform by controlling other submodules; The communication submodule is used to exchange data with various underground cable anti-breakage alarm devices; The human-computer interaction submodule is used to configure the display of relevant data and alarm information; The alarm notification submodule is used to notify relevant responsible persons via SMS.

6. A method for preventing underground cables from breaking externally in a self-organizing network, characterized in that: The method is performed using the system of claim 5, wherein the method comprises the following steps: Step 1: Arrange underground cable external damage prevention alarms at equal intervals on the ground surface above the underground cable tunnel; Step 2: After the underground cable protection alarm is powered on, the underground cable protection alarm equipped with a 4G communication module automatically becomes the master node, and forms a network with the nearby underground cable protection alarms that are not equipped with a 4G communication module through LORA; Step 3: The master node uploads the networking status to the backend operation and maintenance management platform; Step 4: In the map management submodule of the back-end operation and maintenance management platform, enter the location of each underground cable damage prevention alarm; Step 5: The back-end operation and maintenance management platform sends the location information of the underground cable protection alarm to the corresponding underground cable protection alarm through each master node. Each underground cable protection alarm S i Only the four nodes above and below it are recorded. i-2 , S i-1 , S i+1 , S i+2 )’s location; Step 6: When the vibration signal received by the vibration sensor in the underground cable anti-breakage alarm exceeds the first threshold value M1 or the audio signal received by the microphone exceeds the second threshold value M2, the alarm judgment program is started for judgment; Step 7: If the judgment result is that an alarm is required, the alarm module of the underground cable anti-external damage alarm device is activated to alarm, and the alarm information is notified to the main node through the LORA communication module; Step 8: The master node sends the alarm information to the backend operation and maintenance management platform; Step 9: The backend operation and maintenance management platform displays the alarm information based on the map and notifies the relevant responsible persons through the alarm notification submodule.

7. The underground cable anti-breakage alarm method of the ad hoc network as claimed in claim 6, characterized in that: In step 1, the underground cable external damage prevention alarm is evenly arranged on both sides of the underground cable tunnel.

8. The underground cable anti-breakage alarm method of the ad hoc network as claimed in claim 6, characterized in that: Step 6 specifically includes: Step (1) convert the current vibration signal Z i (t) and the pickup value Y i (t) Transmit to four adjacent underground cable external damage alarms (S i-2 , S i-1 , S i+1 , S i+2 ), and activate the adjacent underground cable anti-breakage alarm to actively transmit its current vibration signal and pickup value; Step (2) receiving the adjacent underground cable anti-breakage alarm and transmitting back its current vibration signal and pickup value; Step (3) makes a judgment based on the vibration signal collected by the vibration sensor of the local underground cable anti-external damage alarm and the adjacent underground cable anti-external damage alarm and the sound wave signal value collected by the microphone.

9. The underground cable anti-break alarm method of the ad hoc network as claimed in claim 8, characterized in that: The specific judgment method of step (3) is: (3.1) Adjust and correct the vibration signal based on the sound wave signal: Z i-1 '(t)=Z i-1 (t)*Y i-1 (t)*Y i (0) / (Y i-1 (0)*Y i (t)) Z i-2 ’(t)=Z i-2 (t)*Y i-2 (t)*Y i (0) / (Y i-2 (0)*Y i (t)) Z i+1 ’(t)=Z i+1 (t)*Y i+1 (t)*Y i (0) / (Y i+1 (0)*Y i (t)) Z i+2 ’(t)=Z i+2 (t)*Y i+2 (t)*Y i (0) / (Y i+2 (0)*Y i (t)) Among them, Y i (0) represents the value of the base audio signal of the microphone in the underground cable anti-break alarm device Si when there is no noise; (3.2) Determine the current vibration amount Z'(t) = Z i '(t)+k i-1 *Z i-1 '(t) / d i-1 2 +k i-2 *Z i-2 '(t) / d i-2 2 +k i+1 *Z i+1 '(t) / d i-1 2 +k i+2 *Z i+2 '(t) / d i+2 2 Whether it exceeds the instantaneous vibration threshold M t ; Wherein, d is the distance from the adjacent underground cable anti-breakage alarm device to the current anti-breakage alarm device, and k is an adjustment factor related to the stratum structure, which is directly selected between 0.5 and 5 based on experience; when Z'(t)>M t When Z'(t)≤M t When , jump to step (3.3); (3.3) Determine whether the cumulative vibration amount Z"(t) exceeds the cumulative vibration threshold M l . When Z"(t)>M l When an alarm is issued.

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