Abnormal condition monitoring and reporting method for wireless node detector

Abstract

The invention discloses an abnormal condition monitoring and reporting method for a wireless node detector. The abnormal condition monitoring and reporting method is used for monitoring the operation condition of a large number of wireless node detectors in seismic exploration. Whether a beacon sending wireless node detector is normal or not is judged through a receiving beacon, and a three-layer network architecture is provided, so that when an abnormal condition of the wireless node detector occurs, abnormal information can be immediately forwarded to a seismograph through a preset route. The method achieves the real-time monitoring of the operation condition of the wireless node detector, and powerfully guarantees the efficient operation of seismic exploration.

Description

Technical Field

[0001] The invention relates to the field of geological exploration, and in particular to a method for monitoring and reporting abnormal conditions of a wireless node detector. Background Art

[0002] In geological exploration, for traditional wired detector data acquisition systems, seismographs can monitor the status of each detector in real time. Once a detector fails or is damaged, exploration personnel can promptly repair and replace it, or issue warnings to stop the destructive behavior.

[0003] The current mainstream wireless node detectors first collect seismic data at the field deployment location, and then use dedicated equipment to centrally export the data of all node detectors during the construction interval, such as at night. In this way, the seismometer cannot monitor the status of each node detector in real time. In previous construction, the following types of problems have been found: (1) Node detectors are maliciously damaged and lost: wireless node detectors are maliciously damaged by personnel unrelated to the construction and thrown into a well far away from the construction site; (2) Node detector failure problem: due to the instrument's own reasons, although the wireless node detector is in working condition, the collected data is empty, that is, no valid seismic data is collected.

[0004] Since the seismograph cannot monitor the real-time status of each wireless node detector in real time, construction personnel cannot promptly handle nodes that have been maliciously damaged or lost, and cannot promptly repair or replace failed nodes, which affects the quality of exploration data and work efficiency. Under the condition that the central network is difficult to build and communication can only be carried out through a self-organizing network, how to effectively manage a wireless network containing a large number of nodes, and use as little information transmission as possible, monitor the node status, and report to the seismograph in a timely and reliable manner when abnormal situations occur, is the design core of this patent. Summary of the invention

[0005] In view of the shortcomings of the prior art, the method proposed in the present invention is mainly to effectively manage the wireless node detector network and effectively monitor and report abnormal situations such as node loss or failure in seismic exploration.

[0006] The present invention provides the following technical solutions:

[0007] A method for monitoring and reporting abnormal conditions of a wireless node detector comprises the following steps:

[0008] S1, all deployed wireless node detectors are layered and grouped into three layers: common wireless node detectors, aggregation wireless node detectors, and routing wireless node detectors. One of each group of common wireless node detectors is selected as the aggregation wireless node detector, and some of the multiple aggregation wireless node detectors are selected as routing wireless node detectors. The remaining aggregation wireless node detectors select the nearest routing wireless node detector as the bound routing wireless node detector according to the principle of the shortest distance.

[0009] S2, the common wireless node detector sends a periodic beacon to the aggregation wireless node detector to which it is bound. The aggregation wireless node detector determines whether the common wireless node detector it manages is normal according to the criteria. If the aggregation wireless node detector determines that a common wireless node detector is abnormal, it immediately reports the abnormal information to the routing wireless node detector bound to the aggregation wireless node detector. The routing wireless node detector bound to it will detect and decide whether to forward it to the seismograph;

[0010] S3, the aggregation wireless node detector periodically sends beacons to the routing wireless node detector bound to it, and the routing wireless node detector determines whether the aggregation wireless node detector directly routed to it is normal according to the criteria. If the aggregation wireless node detector is abnormal, the routing wireless node detector bound to the aggregation wireless node detector will determine whether to forward it to the seismograph after detection;

[0011] S4, the routing wireless node detector periodically sends a beacon to the next-hop routing wireless node detector on the routing path to the seismograph, and the next-hop routing wireless node detector determines whether the routing wireless node detector is normal according to the criteria. If a routing wireless node detector determines through the beacon that the previous-hop routing wireless node detector bound to it is abnormal, then the abnormal information is immediately forwarded to the next-hop routing wireless node detector until the abnormal information is forwarded to the seismograph.

[0012] Further, the grouping of the wireless node detectors comprises the following steps:

[0013] F1, the transmission power of the common wireless node detector is P1, the transmission power of the aggregation wireless node detector and the routing wireless node detector is P2, and the corresponding one-hop communication distances are L1 and L2 respectively;

[0014] F2, the set of all wireless node detectors is A, the coordinates of wireless node detector i∈A are (ih,iv), the coordinates of the seismometer are (Dh,Dv), and the square with (Dh,Dv) as the center and L1 as the side length is marked as (0,0).

[0015]

[0016] Then all squares consisting of squares (m,n) m = h_left, ..., h_right, n = v_below, ..., v_up are used to cover all wireless node detectors;

[0017] F3, the wireless node detectors falling within each square form an aggregation group.

[0018] Furthermore, the stratification of the wireless node detectors includes the following steps:

[0019] T1, based on step F3, the wireless node detector closest to the center of the grid in terms of distance is selected as the aggregation wireless node detector, denoted as node j (m,n) , while other wireless node detectors are ordinary wireless node detectors bound to it;

[0020] T2, order Select the sink node

[0021] j (k ,l), As a routing wireless node detector;

[0022] T3, for other aggregation wireless node detectors other than the routing wireless node detector, a nearest routing wireless node detector is selected as the bound routing wireless node detector according to the principle of the shortest distance.

[0023] Furthermore, the routing setting of the routing wireless node detector is:

[0024] For any routing wireless node detector j (k,l) , then:

[0025] a. If l≠0, let Bind its next hop routing wireless node detector to abs is the absolute value of a real number;

[0026] b. If l = 0, let Bind its next hop routing wireless node detector to Finally, each routing wireless node detector sets up a route to reach the seismograph.

[0027] Furthermore, the judgment criteria for abnormal conditions of the node detector include:

[0028] a. The beacon-sending wireless node detector actively marks the data collection failure in the beacon, including but not limited to the collected data being empty or the collected data having obvious problems;

[0029] b. If the receiving wireless node detector cannot detect the beacon of the sending wireless node detector within several consecutive cycles, it is determined that the beacon sending wireless node detector may have been powered off or the communication module is faulty and can no longer send beacons;

[0030] c. If the fluctuation of the beacon level received by the wireless node detector exceeds the set upper and lower thresholds, it is considered that the beacon-sending wireless node detector has been moved or stolen while it was turned on.

[0031] Furthermore, the routing wireless node detector detects abnormal conditions including:

[0032] a. After receiving the abnormal information, the routing wireless node detector checks whether the information has been reported. If it has been reported within a short period of time, the routing wireless node detector directly discards the information;

[0033] b. If it has not been reported, the routing wireless node detector forwards the information to the next-hop routing wireless node detector bound to it until the abnormal information is forwarded to the seismograph.

[0034] Furthermore, each of the wireless node detectors is configured with a communication module, and can communicate with each other within a certain distance. After the network is configured, each wireless node detector sends a beacon to the wireless node detector bound thereto.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] The present invention provides a method for monitoring and reporting abnormal conditions of wireless node detectors. The present invention proposes a three-layer network architecture of wireless node detectors, which divides wireless node detectors into different levels, and sets an effective routing path for each wireless node detector to report abnormal information under this layered architecture, so that when an abnormal condition occurs in the wireless node detector, the abnormal information can be immediately forwarded to the seismograph through a pre-set route, thereby realizing real-time monitoring of the operating status of the wireless node detector and effectively ensuring the efficient implementation of seismic exploration work. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1This is an example diagram of the wireless node detector layout location, network architecture, and wireless node detector division and routing settings of the present invention. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions 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.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0041] The scenario setting of this patent is as follows: before construction, seismic exploration technicians design the location of each wireless node detector according to the exploration requirements and complete the deployment of the wireless node detectors. Each wireless node detector is equipped with a communication module, and can effectively communicate with each other within a certain distance. After the network is configured, each wireless node detector sends a beacon to a specific wireless node detector. In seismic exploration, wireless node detectors are deployed more densely. For example, in a typical construction scenario, the distance between wireless node detectors is 3 meters, while the typical outdoor communication distance of the wireless ad hoc network module can reach 300 meters. In order to effectively manage wireless networks containing a large number of wireless node detectors, and when abnormal situations occur, abnormal information can be effectively reported to the seismograph, this patent proposes a three-layer network architecture of wireless node detectors, which divides wireless node detectors into different levels, and under this layered architecture, each wireless node detector reports an effective routing path for abnormal information.

[0042] Under normal circumstances, since the wireless node detectors will not move after being deployed, and the environment will not change significantly, the average level of the beacon received by the receiving wireless node detector from the sending wireless node detector remains basically unchanged. If the average level changes significantly or no signal can be received at all, or the received beacon indicates that the current wireless node detector cannot work properly, then the neighboring wireless node detector is judged to be invalid or damaged and stolen, and the wireless node detector abnormal information is immediately generated and reported to the seismograph through the preset route, thereby realizing real-time monitoring of the wireless node detector.

[0043] For wireless self-organizing networks, on the one hand, only when a failure occurs does information need to be reported to the seismograph through the self-organizing network. No information needs to be transmitted back, which means no problem, because the probability of failure of a wireless node detector is very small, which greatly reduces the amount of data that needs to be reported; on the other hand, this patent adopts a fixed route setting method, and the abnormal information produced by the wireless node detector is uploaded to the seismograph through a fixed route, reducing the time and cost of route selection.

[0044] The present invention provides a method for monitoring and reporting abnormal conditions of a wireless node detector, comprising the following steps:

[0045] S1, all deployed wireless node detectors are layered and grouped into three layers: common wireless node detectors, aggregation wireless node detectors, and routing wireless node detectors. One of each group of common wireless node detectors is selected as the aggregation wireless node detector, and some of the multiple aggregation wireless node detectors are selected as routing wireless node detectors. The remaining aggregation wireless node detectors select the nearest routing wireless node detector as the bound routing wireless node detector according to the principle of the shortest distance.

[0046] S2, the common wireless node detector sends a periodic beacon to the aggregation wireless node detector to which it is bound. The aggregation wireless node detector determines whether the common wireless node detector it manages is normal according to the criteria. If the aggregation wireless node detector determines that a common wireless node detector is abnormal, it immediately reports the abnormal information to the routing wireless node detector bound to the aggregation wireless node detector. The routing wireless node detector bound to it will detect and decide whether to forward it to the seismograph;

[0047] S3, the aggregation wireless node detector periodically sends beacons to the routing wireless node detector bound to it, and the routing wireless node detector determines whether the aggregation wireless node detector directly routed to it is normal according to the criteria. If the aggregation wireless node detector is abnormal, the routing wireless node detector bound to the aggregation wireless node detector will determine whether to forward it to the seismograph after detection;

[0048] S4, the routing wireless node detector periodically sends a beacon to the next-hop routing wireless node detector on the routing path to the seismograph, and the next-hop routing wireless node detector determines whether the routing wireless node detector is normal according to the criteria. If a routing wireless node detector determines through the beacon that the previous-hop routing wireless node detector bound to it is abnormal, then the abnormal information is immediately forwarded to the next-hop routing wireless node detector until the abnormal information is forwarded to the seismograph.

[0049] This patent proposes a three-layer network structure of wireless node detectors, which divides and groups densely deployed wireless node detectors into ordinary wireless node detectors, converged wireless node detectors, and routing wireless node detectors. The transmission power of ordinary wireless node detectors is P1, and the transmission power of converged wireless node detectors and routing wireless node detectors is P2, and the corresponding one-hop communication distances are L1 and L2 respectively.

[0050] Under normal circumstances, ordinary wireless node detectors send periodic beacons to the aggregation wireless node detectors to which they are bound, and the aggregation wireless node detectors determine whether the ordinary wireless node detectors they manage are normal based on criteria; the aggregation wireless node detectors periodically send beacons to the routing wireless node detectors to which they are bound, and the routing wireless node detectors determine whether the aggregation wireless node detectors directly routed to them are normal based on criteria; the routing wireless node detectors periodically send beacons to the next-hop routing wireless node detector on the routing path to the seismograph, and the next-hop routing wireless node detector determines whether the routing wireless node detector is normal based on criteria.

[0051] If the converged wireless node detector determines that a common wireless node detector is abnormal, it will immediately report the abnormal information to the routing wireless node detector bound to the converged wireless node detector. After receiving the abnormal information, the routing wireless node detector checks whether the information has been reported. If it has been reported in a short time, the routing wireless node detector directly discards the information. If it has not been reported, the routing wireless node detector forwards the information to the next-hop routing wireless node detector bound to it until the abnormal information is forwarded to the seismograph.

[0052] If an abnormality occurs in the aggregation wireless node detector, the routing wireless node detector bound to the aggregation wireless node detector will determine the abnormality through the beacon. If it is checked that the information has not been reported in a short time, the information will be immediately forwarded to the next-hop routing wireless node detector bound to it to the seismograph until the abnormal information is forwarded to the seismograph.

[0053] If a routing wireless node detector determines through the beacon that the previous hop routing wireless node detector bound to it is abnormal, then the abnormal information is immediately forwarded to the next hop routing wireless node detector until the abnormal information is forwarded to the seismograph.

[0054] In this way, when the network is connected and all wireless node detectors are normal, occasional abnormal information can be reported to the seismograph through the set route, and seismic exploration personnel can promptly check the abnormal wireless node detectors to ensure the effective implementation of seismic exploration work.

[0055] This patent proposes a method for dividing wireless node detectors and setting fixed routes in a three-layer network. This method requires technicians to know the location coordinates of all wireless node detectors, which is easy to meet in seismic exploration.

[0056] Further, as a specific implementation, the grouping of the wireless node detectors includes the following steps:

[0057] F1, the transmission power of the common wireless node detector is P1, the transmission power of the aggregation wireless node detector and the routing wireless node detector is P2, and the corresponding one-hop communication distances are L1 and L2 respectively;

[0058] F2, the set of all wireless node detectors is A, the coordinates of wireless node detector i∈A are (ih,iv), the coordinates of the seismometer are (Dh,Dv), and the square with (Dh,Dv) as the center and L1 as the side length is marked as (0,0).

[0059]

[0060] Then all squares consisting of squares (m,n) m = h_left, ..., h_right, n = v_below, ..., v_up are used to cover all wireless node detectors;

[0061] F3, the wireless node detectors falling within each square form an aggregation group.

[0062] The wireless node detectors falling in each square form a convergence group (the wireless node detectors falling on the edge of the square belong to any of the two squares to which the current belongs), and the wireless node detector closest to the center of the square is selected as the convergence wireless node detector, denoted as node j (m,n) , while other wireless node detectors are ordinary wireless node detectors bound to it. In this way, all wireless node detectors are divided into aggregation wireless node detectors or ordinary wireless node detectors.

[0063] Further, as a specific implementation, the layering of the wireless node detectors includes the following steps:

[0064] T1, based on step F3, the wireless node detector closest to the center of the grid in terms of distance is selected as the aggregation wireless node detector, denoted as node j (m,n) , while other wireless node detectors are ordinary wireless node detectors bound to it;

[0065] T2, order Select the sink node

[0066] j(k ,l), As a routing wireless node detector;

[0067] T3, for other aggregation wireless node detectors other than the routing wireless node detector, a nearest routing wireless node detector is selected as the bound routing wireless node detector according to the principle of the shortest distance.

[0068] Further, as a specific implementation, the routing setting of the routing wireless node detector is:

[0069] For any routing wireless node detector j (k,l) , then:

[0070] a. If l≠0, let Bind its next hop routing wireless node detector to abs is the absolute value of a real number;

[0071] b. If l = 0, let Bind its next hop routing wireless node detector to Finally, each routing wireless node detector sets up a route to reach the seismograph.

[0072] For other aggregation wireless node detectors other than the routing wireless node detector, the nearest routing wireless node detector in set B is searched for as the next-hop routing wireless node detector bound to it.

[0073] In this way, the common wireless node detector sends a beacon to the aggregation wireless node detector to which it is bound, the aggregation wireless node detector sends a beacon to the routing wireless node detector to which it is bound, and the routing wireless node detector sends a beacon to the next-hop routing wireless node detector to which it is bound. When an abnormal situation occurs, the aggregation wireless node detector sends the abnormal information through the routing wireless node detector to which it is bound, and the routing wireless node detector sends the abnormal information to the next-hop routing wireless node detector until the abnormal information is forwarded to the seismograph, thereby realizing real-time monitoring of network abnormalities.

[0074] Further, as a specific implementation, the judgment criteria for the abnormal condition of the node detector include:

[0075] a. The beacon sends a wireless node detector that actively marks the data collection failure in the beacon, including but not limited to the collected data being empty or the collected data having obvious problems (the judgment criteria for problems with the collected data can be determined by the technicians and are not specified in this patent);

[0076] b. If the receiving wireless node detector cannot detect the beacon of the sending wireless node detector within several consecutive cycles, it is determined that the beacon sending wireless node detector may have been powered off or the communication module is faulty and can no longer send beacons;

[0077] c. If the fluctuation of the beacon level received by the wireless node detector exceeds the set upper and lower thresholds, it is considered that the beacon-sending wireless node detector has been moved or stolen while it was turned on.

[0078] Further, as a specific implementation, the routing wireless node detector detects abnormal conditions including:

[0079] a. After receiving the abnormal information, the routing wireless node detector checks whether the information has been reported. If it has been reported within a short period of time, the routing wireless node detector directly discards the information;

[0080] b. If it has not been reported, the routing wireless node detector forwards the information to the next-hop routing wireless node detector bound to it until the abnormal information is forwarded to the seismograph.

[0081] Further, as a specific implementation, the time slot allocation method of the wireless node detector includes:

[0082] The system time is divided periodically into time slots, and the length of each time slot is T0.

[0083] The start time of the time slot is 0. In each time slot cycle, the beacon transmission time of all ordinary wireless node detectors is limited to [0, T1 + ΔT1]. The time period [0, T1] is evenly divided into 9 parts, and ΔT1 is a protection interval in which no information is transmitted. Starting from the square closest to the seismometer, each square selects a time period of length T1 / 9 from the 9 parts as the beacon transmission time period of the ordinary wireless node detector of this aggregation group. The selection requirement is that the time period of the current square cannot be the same as the time period of its adjacent squares. Since each square has a maximum of 8 neighboring squares, the above requirement can be met. The maximum number of ordinary wireless node detectors in all aggregation groups is M1. In the time period selected by this square, the aggregation wireless node detector evenly distributes a time period of length T1 / 9M1 as the beacon transmission time period of each ordinary wireless node detector point. T1 / 9M1 is greater than the actual beacon transmission time to avoid interference problems caused by incomplete synchronization between wireless node detectors.

[0084] In each time slot cycle, the beacon transmission time of all the converged wireless node detectors is limited to [T1+ΔT1,T1+ΔT1+T2+ΔT2], where ΔT2 is a protection interval in which no information is transmitted. Starting from the square closest to the seismometer, each square selects one of the 9 parts with a length of The time period is used as the beacon sending time period of the aggregation wireless node detector of this aggregation group. The selection requirement is that the time period of the current aggregation wireless node detector cannot be the same as the time period of its adjacent aggregation wireless node detector. Since each square has a maximum of 8 neighboring aggregation wireless node detectors, the above requirement can be met. It is longer than the actual beacon transmission time to avoid interference problems caused by incomplete synchronization between wireless node detectors.

[0085] In each time slot cycle, the beacon transmission time of all routing wireless node detectors is limited to [T1+ΔT1+T2+ΔT2,T1+ΔT1+T2+ΔT2+T3+ΔT3], where ΔT3 is a protection interval in which no information is transmitted. Starting from the routing wireless node detector closest to the seismometer, each routing wireless node detector selects one of the nine parts with a length of The time period of the beacon transmission is selected as the time period of the beacon transmission, and the selection requirement is that it cannot be the same as the time period of the adjacent routing wireless node detector. Since each routing wireless node detector has at most 8 neighboring routing wireless node detectors, the above requirement can be met. It is longer than the actual beacon transmission time to avoid interference problems caused by incomplete synchronization between wireless node detectors.

[0086] The time period [T3+ΔT1+ΔT2+ΔT3, T0] is the idle time within a time slot cycle. If the aggregation wireless node detector needs to report abnormal information, then during the idle time of each cycle, the CDMA / CA protocol is used to preempt the channel and send the abnormal information to the bound routing wireless node detector. If the routing wireless node detector needs to report abnormal information, the CDMA / CA protocol is also used to preempt the channel and forward the abnormal information to the bound next-hop routing wireless node detector until it is forwarded to the seismograph.

[0087] In actual seismic exploration, T0 can be set relatively large, and there is more idle time in each time slot cycle, so that abnormal information can be reported to the seismograph in time.

[0088] In a specific implementation, in a specific seismic exploration, the wireless node detector is as follows Figure 1The wireless node detectors are arranged at a distance of 3 meters around the seismometer in a grid structure. The wireless node detectors are equipped with communication modules, and the wireless node detectors form a wireless self-organizing network, which can report abnormal information to the seismometer.

[0089] 1. Network architecture and wireless node detector division

[0090] exist Figure 1 In the layout diagram of seismic exploration wireless node detectors shown in the figure, all 180 wireless node detectors are divided into three layers: ordinary wireless node detectors, aggregation wireless node detectors and routing wireless node detectors. The wireless node detectors falling within each dotted box are divided into an aggregation group. The central wireless node detectors marked in red or blue are the aggregation wireless node detectors bound to this aggregation group, and the others are ordinary wireless node detectors. Then, according to the above method, a part of the aggregation wireless node detectors is selected as routing wireless node detectors, such as Figure 1 The red wireless node detector is shown in the figure. The broken line with an arrow is the fixed path of the routing wireless node detector to the seismometer. Other aggregation wireless node detectors except the routing wireless node detector select the nearest routing wireless node detector as the bound routing wireless node detector according to the principle of the shortest distance.

[0091] 2. Time slot division

[0092] Set T0 = 1, T1 = 0.09, ΔT1 = 0.01, T2 = 0.09, ΔT2 = 0.01, T3 = 0.09, ΔT3 = 0.01, and the time unit is seconds. In this way, the beacon transmission time allocated to all wireless node detectors in each aggregation group is ; The beacon sending time allocated to each aggregation wireless node detector is 10ms; The beacon sending time allocated to each routing wireless node detector is 10ms. In each 1-second time cycle, the last 700ms is idle. If a wireless node detector needs to report abnormal information, the CDMA / CA protocol can be used to preempt the channel.

[0093] The embodiments described above are only descriptions of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A method for monitoring and reporting abnormal conditions of a wireless node detector, characterized in that: The following steps are involved: S1, all deployed wireless node detectors are layered and grouped into three layers: common wireless node detectors, aggregation wireless node detectors, and routing wireless node detectors. One of each group of common wireless node detectors is selected as the aggregation wireless node detector, and some of the multiple aggregation wireless node detectors are selected as routing wireless node detectors. The remaining aggregation wireless node detectors select the nearest routing wireless node detector as the bound routing wireless node detector according to the principle of the shortest distance. S2, the common wireless node detector sends a periodic beacon to the aggregation wireless node detector to which it is bound. The aggregation wireless node detector determines whether the common wireless node detector it manages is normal according to the criteria. If the aggregation wireless node detector determines that a common wireless node detector is abnormal, it immediately reports the abnormal information to the routing wireless node detector bound to the aggregation wireless node detector. The routing wireless node detector bound to it will detect and decide whether to forward it to the seismograph; S3, the aggregation wireless node detector periodically sends beacons to the routing wireless node detector bound to it, and the routing wireless node detector determines whether the aggregation wireless node detector directly routed to it is normal according to the criteria. If the aggregation wireless node detector is abnormal, the routing wireless node detector bound to the aggregation wireless node detector will determine whether to forward it to the seismograph after detection; S4, the routing wireless node detector periodically sends a beacon to the next-hop routing wireless node detector on the routing path to the seismograph, and the next-hop routing wireless node detector determines whether the routing wireless node detector is normal according to the criteria. If a routing wireless node detector determines through the beacon that the previous-hop routing wireless node detector bound to it is abnormal, then the abnormal information is immediately forwarded to the next-hop routing wireless node detector until the abnormal information is forwarded to the seismograph.

2. The method for monitoring and reporting abnormal conditions of a wireless node detector according to claim 1, characterized in that: The grouping of the wireless node detectors comprises the following steps: F1, the transmission power of the common wireless node detector is P1, the transmission power of the aggregation wireless node detector and the routing wireless node detector is P2, and the corresponding one-hop communication distances are L1 and L2 respectively; F2, the set of all wireless node detectors is A, the coordinates of wireless node detector i∈A are (ih,iv), the coordinates of the seismometer are (Dh,Dv), and the square with (Dh,Dv) as the center and L1 as the side length is marked as (0,0). Then all the squares consisting of squares (m,n) m=h_left,...,h_right,n=v_below,...,v_up are used to cover all wireless node detectors; F3, the wireless node detectors falling within each square form an aggregation group.

3. The method for monitoring and reporting abnormal conditions of a wireless node detector according to claim 2, characterized in that: The layering of the wireless node detector includes the following steps: T1, based on step F3, the wireless node detector closest to the center of the grid in terms of distance is selected as the aggregation wireless node detector, denoted as node j (m,n) , while other wireless node detectors are ordinary wireless node detectors bound to it; T2, order Select the sink node j (k ,l), As a routing wireless node detector; T3, for other aggregation wireless node detectors other than the routing wireless node detector, a nearest routing wireless node detector is selected as the bound routing wireless node detector according to the principle of the shortest distance.

4. The method for monitoring and reporting abnormal conditions of a wireless node detector according to claim 3, characterized in that: The routing settings of the routing wireless node detector: For any routing wireless node detector j (k,l) , then: a. If l≠0, let Bind its next hop routing wireless node detector to abs is the absolute value of a real number; b. If l = 0, let Bind its next hop routing wireless node detector to Finally, each routing wireless node detector sets up a route to reach the seismograph.

5. The method for monitoring and reporting abnormal conditions of a wireless node detector according to claim 1, characterized in that: The judgment criteria for abnormal conditions of the node detector include: a. The beacon-sending wireless node detector actively marks the data collection failure in the beacon, including but not limited to the collected data being empty or the collected data having obvious problems; b. If the receiving wireless node detector cannot detect the beacon of the sending wireless node detector within several consecutive cycles, it is determined that the beacon sending wireless node detector may have been powered off or the communication module is faulty and can no longer send beacons; c. If the fluctuation of the beacon level received by the wireless node detector exceeds the set upper and lower thresholds, it is considered that the beacon-sending wireless node detector has been moved or stolen while it was turned on.

6. The method for monitoring and reporting abnormal conditions of a wireless node detector according to claim 1, characterized in that: The routing wireless node detector detects abnormal conditions including: a. After receiving the abnormal information, the routing wireless node detector checks whether the information has been reported. If it has been reported within a short period of time, the routing wireless node detector directly discards the information; b. If it has not been reported, the routing wireless node detector forwards the information to the next-hop routing wireless node detector bound to it until the abnormal information is forwarded to the seismograph.

7. The method for monitoring and reporting abnormal conditions of a wireless node detector according to claim 1, characterized in that: Each of the wireless node detectors is configured with a communication module, and can communicate with each other within a certain distance. After the network is configured, each wireless node detector sends a beacon to the wireless node detector bound to it.

Images