A low-power geological disaster early warning and relief method, system and device

Abstract

The present invention provides a low-power geological disaster early warning and relief method, system and device, which are used to improve the reliability and effectiveness of the early warning system and ensure that early warnings can be issued to the public in a timely and accurate manner at critical moments. The method comprises: drawing an undirected weighted graph according to the deployment of early warning units in the disaster area, each of which corresponds to a node; taking a starting node as a current node, searching for candidate nodes near the current node, and selecting an optimal candidate node according to the sum of the distances of the candidate node from the current node and the target node, the estimated remaining power of the candidate node and the real-time signal strength of the candidate node, transmitting information to the optimal candidate node, taking the optimal candidate node as the new current node, and continuing to search for the candidate nodes near the node until the information is transmitted to the target node.

Description

Technical Field

[0001] The present invention relates to the field of disaster warning technology, and in particular to a low-power geological disaster warning and relief method, system and device. Background Art

[0002] In recent years, geological disasters have occurred frequently, posing serious threats. However, there are certain regularities before or during a disaster, and these regularities can be monitored through technical means. By collecting data related to disasters and using early warning systems to issue warnings in advance, the losses caused by disasters can be effectively reduced. At present, commonly used early warning technologies include outdoor broadcasters and indoor sound and light alarms.

[0003] The outdoor broadcasting machine is composed of a high-power speaker, a broadcasting host, a 4G communication module and a power supply system. Its alarm mechanism is triggered by sending instructions from the host computer, and can be set to a fixed duration or a continuous alarm. Although this design is intuitive, there are also some problems. First, the huge energy consumption will affect the continuous operation ability of the equipment, and it may even fail to issue an alarm in time due to insufficient power or equipment failure; second, the fixed alarm duration may not cover all people, causing some people to miss the early warning information for various reasons and miss the best time to respond to disasters.

[0004] The indoor sound and light alarm consists of a buzzer, warning lamp beads, control mainboard, communication module and power supply system. Its alarm mechanism can be triggered by the command of the host computer or the slave computer, and can also be set to a fixed duration or continuous alarm. In addition to the problems of outdoor broadcasting machines, this design may not be able to issue warnings in time due to unstable network links, increasing the risk of warning failure.

[0005] In order to improve the reliability and effectiveness of the early warning system, we can consider adopting more flexible alarm duration settings, as well as enhancing the power management and network communication capabilities of the equipment to ensure that early warnings can be issued to the public in a timely and accurate manner at critical moments. Summary of the invention

[0006] 1. Purpose of the invention

[0007] The purpose of the present invention is to provide a low-power geological disaster early warning and relief method, system and device, which are used to improve the reliability and effectiveness of the early warning system and ensure that early warnings can be issued to the public in a timely and accurate manner at critical moments.

[0008] (II) Technical solution

[0009] To solve the above problems, the first aspect of the present invention provides a low-power geological disaster early warning and disaster relief method, comprising:

[0010] Undirected weighted graph drawing step: drawing an undirected weighted graph according to the deployment of the early warning units in the disaster area, each of the early warning units corresponds to a node;

[0011] Information transmission step: take the starting node as the current node, search for candidate nodes near the current node, and select the optimal candidate node according to the sum of the distances between the candidate node and the current node and the target node, the estimated remaining power of the candidate node and the real-time signal strength of the candidate node, transmit information to the optimal candidate node, take the optimal candidate node as the new current node, and continue to search for the candidate nodes near the node until the information is transmitted to the target node.

[0012] Furthermore, the undirected weighted graph in the low-power geological disaster early warning and relief method is ;

[0013] in, is the set of nodes, that is , is the set of all links between the nodes, that is , where the node and nodes The link between .

[0014] Furthermore, in the information transmission step of the low-power geological disaster early warning and relief method, the path node value is calculated according to the sum of the distances between the candidate node and the current node and the target node, the estimated remaining power of the candidate node, and the real-time signal strength, and the candidate node with the largest path node value is selected as the optimal candidate node;

[0015] When the transmitted information is a data transmission instruction, the calculation formula of the path node value is:

[0016]

[0017] in, for The current node at the time The path node value of for The node to be selected at the time After the last transmission and update of the above information, the estimated remaining power is for The candidate node at the time Real-time signal strength, For the current node The number of nearby nodes to be selected, for The candidate node at the time Respectively with the current node and the target node The sum of the distances, for The remaining power limit factor at any time, for The signal strength limiting factor at the moment;

[0018] The remaining power limit factor at the moment The calculation formula is:

[0019]

[0020] in, To conserve the remaining power;

[0021] Signal strength limiting factor at the moment The calculation formula is:

[0022]

[0023] in, is a conservative signal strength.

[0024] Furthermore, in the information transmission step described in the above-mentioned low-power geological disaster early warning and disaster relief method, the path node value is calculated according to the sum of the distances between the candidate node and the current node and the target node, the estimated remaining power of the candidate node, and the real-time signal strength, and the candidate node with the largest path node value is selected as the optimal candidate node;

[0025] When the transmitted information is a warning instruction, the calculation formula of the path node value is:

[0026] .

[0027] Furthermore, in the above-mentioned low-power geological disaster early warning and disaster relief method The candidate node at the time Respectively with the current node and the target node The sum of the distances The calculation formula is:

[0028]

[0029] in, for The current node at the time and the candidate node The distance between for The candidate node at the time With the target node The distance between

[0030] The calculation formulas are:

[0031]

[0032] The current node The coordinates are: ; The node to be selected The coordinates are: ; The target node The coordinates are: .

[0033] Furthermore, the information transmission step in the above-mentioned low-power geological disaster early warning and disaster relief method also includes:

[0034] Update node status step: The node The node status is transmitted to the server node, wherein the node status includes the estimated remaining power and the real-time signal strength;

[0035] The node exist The estimated remaining power at the time for:

[0036]

[0037] in, for The node at the moment The actual remaining power, According to the node The estimated average power increment obtained by the transmit power consumption, receive power consumption, sleep power consumption, event power consumption and current charging efficiency, the estimated remaining power and the actual remaining power are both measured in percentage;

[0038] The estimated average power increase at the time The calculation formula is:

[0039]

[0040] in, for The average value of the current loss and the charging current increment at each moment, for After the information transmission is completed, the node The return cycle, for After the information transmission is completed, the node The return cycle, For Node The electrical energy capacity, The calculation formula is:

[0041]

[0042] in, for The charging current at the moment, for The emission current at the moment, for The receiving current at the moment, for The event loss current at the moment;

[0043] Get the node exist The measured signal strength at the time , and as The real-time signal strength at the moment .

[0044] Furthermore, in the above-mentioned low-power geological disaster early warning and disaster relief method The node at the moment The return cycle and The node at the moment The return cycle The relationship between them is:

[0045]

[0046] in, is the adjustment factor of the feedback period;

[0047] Modulating Factor The calculation formula is:

[0048]

[0049] in, The remaining power limit.

[0050] Furthermore, in the above-mentioned low-power geological disaster early warning and disaster relief method, if and When can be selected as the optimal candidate node for transmitting data transmission instructions and early warning instructions;

[0051] like or When Only the optimal candidate node can be selected as the node for transmitting the early warning instruction and the node status.

[0052] A second aspect of the present invention provides a low-power geological disaster early warning and disaster relief system, comprising:

[0053] Early warning unit;

[0054] The early warning unit includes: a first early warning unit, a second early warning unit, an indication unit, a monitoring unit and a relay unit;

[0055] The first warning unit is an outdoor broadcaster, which is deployed outdoors. The network module uses a combination of a 4G module and a Lora module to route and aggregate node information of each unit to upload data to the server.

[0056] The second early warning unit is an indoor sound and light alarm, which is deployed indoors. The network module uses the Lora module to remind people indoors to escape.

[0057] The indication unit is an outdoor escape indicator, which is deployed outdoors. The network module adopts the Lora module, which can be used to guide people to escape when a disaster occurs;

[0058] The monitoring unit is a disaster monitoring device deployed outdoors. The network module adopts a Lora module with a built-in early warning model. It has the function of directly sending early warning instructions to the first early warning unit, the second early warning unit and the indication unit according to different situations, and at the same time sends data and status information to the server through the first early warning unit;

[0059] The relay unit is deployed between the first warning unit, the second warning unit, the indication unit, and the monitoring unit. It is used to perform the relay routing function and adopts the Lora module for the network module.

[0060] A third aspect of the present invention provides a low-power geological disaster early warning and disaster relief device, comprising:

[0061] Undirected weighted graph drawing module: used to draw an undirected weighted graph according to the deployment of early warning units in the disaster area;

[0062] Information transmission module: used to take the starting node as the initial current node, search for candidate nodes near the current node, and select the optimal candidate node based on the sum of the distances between the candidate node and the current node and the target node, the current remaining power of the candidate node and the current signal strength, and transmit information to the optimal candidate node until the information is transmitted to the target node.

[0063] (III) Beneficial effects

[0064] The above technical solution of the present invention has the following beneficial technical effects:

[0065] 1. A low-power geological disaster early warning and relief method provided by the present invention can dynamically optimize the communication path between nodes so that each node is in the best state, and can reduce the power consumption of each node so that each node has enough time to restore power.

[0066] 2. The low-power geological disaster early warning and relief system provided by the present invention provides instructions for people to escape by adding an indication unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Figure 1 is a schematic diagram of an undirected weighted graph according to an embodiment of the present invention;

[0068] Figure 2 is a schematic diagram of a process according to an embodiment of the present invention;

[0069] Figure 3 2 is a schematic diagram of searching for the best candidate node in the first round according to an embodiment of the present invention;

[0070] Figure 4 is a schematic diagram of searching for the best candidate node in the second round according to an embodiment of the present invention;

[0071] Figure 5 2 is a schematic diagram of searching for the best candidate node in the third round according to an embodiment of the present invention;

[0072] Figure 6 is a structural block diagram according to an embodiment of the present invention. DETAILED DESCRIPTION

[0073] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0074] The embodiments of the present invention are described below with reference to the accompanying drawings.

[0075] refer to Figure 1 , the embodiment shown in the present invention provides a geological disaster early warning system, including: an early warning unit, wherein the early warning unit includes: a first early warning unit, a second early warning unit, an indication unit, a monitoring unit and a relay unit;

[0076] The first warning unit is an outdoor broadcaster, which is deployed outdoors and has the functions of high-power alarm, wireless communication and intelligent coordination. The network module uses a combination of 4G module and Lora (Long Range Radio) module, which can route and collect information from each unit node and upload data to the server.

[0077] The second early warning unit is an indoor sound and light alarm, which is deployed indoors and has low-power sound and light alarm and wireless communication functions. The network module uses the Lora module to remind people indoors to escape in time when a disaster occurs.

[0078] The indication unit is an outdoor escape indicator, which is deployed outdoors and has optical signal indication and wireless communication functions. The network module adopts the Lora module, which can guide people to escape when a disaster occurs. The indication unit can be arranged along the escape route;

[0079] The monitoring unit is a disaster monitoring device deployed outdoors with a built-in early warning model. It can directly send early warning instructions to the first early warning unit, the second early warning unit and the indication unit according to different situations. At the same time, it sends data and status information to the server through the first early warning unit. The network module adopts the Lora module.

[0080] The relay unit is deployed between the first warning unit, the second warning unit, the indication unit, and the monitoring unit, and plays a relay routing function. The Lora module is used as the network module.

[0081] Charge the deployed warning units and complete the initialization settings. Write the address information table of all warning units into the warning unit ROM. The address information is the unique identification of each warning unit. According to the address information, it can communicate with multiple warning units adjacent to the node. The transmission path can be planned in advance for each warning unit.

[0082] The stronger the signal strength of the Lora module, the better the communication capability and stability, and the better the quality of transmitted data, timely and accurate. However, the Lora module is easily affected by distance, external environment and operating voltage, and will fluctuate over time. If a fixed network path is used, it is very likely that communication and early warning functions will not be achieved during a certain period of time.

[0083] At the same time, in order to improve the stability and robustness of network communications, it is necessary to comprehensively consider factors such as the remaining power of each node device, signal strength, and transmission path length, and dynamically plan and communicate the wireless communication links between early warning units.

[0084] At the same time, since the traditional early warning mode is to work or stop at the same time through sound and light, and does not use different warning levels to distinguish the disaster level, the masses cannot immediately judge the severity of the disaster after receiving the warning information, which may delay disaster avoidance or cause unnecessary riots due to low-risk warnings. Therefore, different signals are sent out by the first warning unit, the second warning unit and the indication unit to distinguish the warning levels, as shown in the following table:

[0085] Table 1

[0086]

[0087] The present invention also provides a low-power geological disaster early warning and disaster relief method, referring to Figure 2 , including the following steps:

[0088] Steps for drawing an undirected weighted graph: Draw an undirected weighted graph based on the deployment of early warning units in the disaster area, with each early warning unit corresponding to a node.

[0089] refer to Figure 1 , the weighted graph is ;in, is the set of nodes, that is , is the set of all links between nodes, that is , where the node and nodes The link between .

[0090] Information transmission steps: take the starting node as the current node, search for candidate nodes near the current node, and select the optimal candidate node based on the sum of the distances between the candidate node and the current node and the target node, the estimated remaining power of the candidate node, and the real-time signal strength of the candidate node. Transmit the information to the optimal candidate node, take the optimal candidate node as the new current node, and continue to search for candidate nodes near the node until the information is transmitted to the target node.

[0091] The path node value is calculated according to the sum of the distances between the candidate node and the current node and the target node, the estimated remaining power of the candidate node, and the real-time signal strength, and the candidate node with the largest path node value is selected as the optimal candidate node;

[0092] When the transmitted information is a data transmission instruction, the calculation formula of the path node value is:

[0093] (1)

[0094] in, for Current node at time The path node value of for Nodes to be selected at any time After the last information transmission and update, the estimated remaining power is for Nodes to be selected at any time Real-time signal strength, For the current node The number of nearby nodes to be selected, for Nodes to be selected at any time Respectively with the current node and the target node The sum of the distances, for The remaining power limit factor at any time, for The signal strength limiting factor at the moment;

[0095] Remaining power limit factor at any time The calculation formula is:

[0096] (2)

[0097] in, To conserve the remaining power;

[0098] Signal strength limiting factor at all times The calculation formula is:

[0099] (3)

[0100] in, is a conservative signal strength.

[0101] When the transmitted information is an early warning instruction, the calculation formula of the path node value is:

[0102] (4)

[0103] Nodes to be selected at any time Respectively with the current node and the target node The sum of the distances The calculation formula is:

[0104] (5)

[0105] in, for Current node at time The candidate node The distance between for Nodes to be selected at any time and the target node The distance between

[0106] refer to Figure 3 , current node The coordinates are: ; Nodes to be selected The coordinates are: ; Target node The coordinates are: ,then Current node at time With the candidate node The distance between The calculation formula is:

[0107] (6)

[0108] Nodes to be selected at any time and the target node The distance between for:

[0109] (7)

[0110] In order to ensure that the power and signal strength of each node can issue an alarm in time, the information transmission step also includes: updating the node status step: updating the node status step at intervals The node status is transmitted to the server node, and the node status includes the estimated remaining power and real-time signal strength;

[0111] node exist Estimated remaining battery power at the moment for:

[0112] (8)

[0113] in, for Time Node The actual remaining power, According to the node The estimated average power increment is obtained by the transmit power consumption, receive power consumption, sleep power consumption, event power consumption and current charging efficiency. The estimated remaining power and actual remaining power are both measured in percentage;

[0114] Estimated average power increment at all times The calculation formula is:

[0115] (9)

[0116] in, for The average value of the current loss and the charging current increment at each moment, for After the information transmission is completed, the node The return cycle, for After the information transmission is completed, the node The return cycle, For Node The electrical energy capacity, The calculation formula is:

[0117] (10)

[0118] in, for The charging current at the moment, for The emission current at the moment, for The receiving current at the moment, for The event loss current at the moment;

[0119] Get Node exist The measured signal strength at the time , and as Real-time signal strength at all times .

[0120] In practical applications, the transmission power of the Lora module is constant each time, and the transmission power will not be dynamically adjusted as the distance between adjacent nodes changes. Therefore, if the distance between adjacent nodes is too far, the signal strength is weak and insufficient to form a link to complete communication. Therefore, nodes that are too far away are non-adjacent nodes. Only nodes that are closer can meet the signal strength to complete the transmission of data transmission instructions and warning instructions. Time, node to be selected Real-time signal strength satisfy and When Can be selected as the optimal candidate node for transmitting data transmission instructions and warning instructions if or When Only the optimal candidate node can be selected for transmitting warning instructions and node status. At this time, the return cycle can be increased. If the power is less, the return cycle can be increased again to reduce power consumption. The specific operations are as follows:

[0121] Time Node The return cycle and Time Node The return cycle The relationship between them is:

[0122] (11)

[0123] in, is the adjustment factor of the feedback cycle;

[0124] Modulating Factor The calculation formula is:

[0125] (12)

[0126] in, The remaining power limit.

[0127] Node For example, the actual remaining power is 100% in the initial state, so the initial actual remaining power is also 100%, and the node The power consumption of the device includes transmission power consumption, reception power consumption, sleep power consumption and event power consumption. Time Node Total power consumption for: ,and The power can be replenished by solar energy at any time, and the power increment can be estimated and evaluated. It can be calculated by formula (8). Estimated power increment at all times If the power is much greater than the current shortfall, the power will be restored to 100%. Estimated remaining battery power at the moment for: .when When , the return cycle remains unchanged; when When , the return cycle is increased to reduce power consumption; when When the transmission period is increased again, the power consumption can be reduced.

[0128] The following is an explanation with specific examples. Figure 3 and Figure 4, all nodes are initially powered on, and all nodes are fully powered, that is, 100%. Assuming that the node consumes 10% of the power to update the node status once, it is necessary to obtain the power from the corresponding node of the monitoring unit Transmit information to the target node .

[0129] In the first round of searching for the best candidate node, the node There are three nodes to be selected near , which are: ,The parameter configuration of each node is shown in Table 2.

[0130] Table 2

[0131]

[0132] The information transmitted at this time is the data transmission instruction, so the path node value can be calculated as follows:

[0133]

[0134] So choose the node As the best candidate node, the next step is to use node As the current node, continue to search for nearby candidate nodes and start the second round of searching for the best candidate node. Figure 4 , at this time node There are 3 candidate nodes nearby, and the parameter configuration of each node is shown in Table 3.

[0135] Table 3

[0136]

[0137] The path node value can be calculated as follows:

[0138]

[0139] So choose the node As the best candidate node, the next step is to use node As the current node, continue to search for nearby candidate nodes and start the third round of searching for the best candidate node. There is only one candidate node nearby, namely the target node , and finally connecting all the links is the best path, such as Figure 5 The best path is sent to each node, i.e., the early warning unit, through the server, and each node is powered on again to work according to the best path, and the node status is transmitted back at intervals of the transmission cycle. If the server detects that at least one node has not transmitted data within the specified transmission cycle, or the actual remaining power of at least one node is less than 30%, or after a monitoring day, the early warning and disaster relief method shown in the present invention is restarted to recalculate the path.

[0140] It can be seen that the communication path between the nodes is always in the best state, which can ensure the transmission quality of the warning information. At the same time, each node can adjust the working mode according to its own power, so that each node has enough actual recovery to full power.

[0141] Traditional early warning units usually use fixed duration or continuous duration for early warning. When the early warning unit receives the early warning command, the early warning action is triggered, and the early warning is fixed for a period of time according to the built-in timer. For example, the alarm continues for half an hour or several hours when no one cancels the alarm; or it continues until the power of the device is zero. For outdoor alarm units, the power of the general broadcast speaker is 100W, plus the alarm light and other peripherals, the total power consumption is higher than 100W. Under such power consumption, no matter how large the battery and solar panel are, they will eventually run out of power. If the power cannot be replenished in a short period of time, the early warning unit may be unable to perform the early warning action after receiving a new early warning command.

[0142] Therefore, in this embodiment, if the node needs to be warned, a short-term warning or a long-term warning can be executed according to the actual remaining power of the node. The short-term warning is that after the node receives the warning instruction, the warning effective duty cycle is adjusted and executed according to the adaptive algorithm according to the actual remaining power of the node in a short time. For example, the short cycle can be set as 1 minute as an alarm cycle, and an alarm signal is issued in the first 40 seconds of an alarm cycle, and the remaining 20 seconds are dormant, and the cycle is repeated 20 times. The long-term warning refers to the fact that the masses did not lift the warning during the short-term warning period and started. Its execution is calculated according to a certain algorithm based on the actual remaining power of the node. The long cycle can be set as 1 hour as an alarm cycle, and an alarm signal is issued in the first 20 minutes of an alarm cycle, and the remaining 40 minutes are dormant, and the cycle is repeated 10 times. The first 20 minutes are executed in the short-term warning mode, that is, 20 minutes are 20 short-term warnings, and an alarm message is issued in the first 40 seconds of each short cycle, and the remaining 20 seconds are dormant. The effective duty cycle of short-cycle warning refers to the ratio of the duration of continuous output of alarm sound and light information to the duration of stop within one minute. Since the remaining power of the warning unit and the effective output of the warning should not be in a linear relationship, but show a law of slowing down with the increase of the remaining power of the warning unit, the logarithmic fitting formula is used for calculation, and the calculation formula is as follows:

[0143]

[0144]

[0145] in, The duration of alarm output. To stop the alarm duration, for The node at the moment The actual remaining power, and Two parameter constants.

[0146] According to the warning duration rule of this embodiment, the actual remaining power of the node is 30%, 40%, 50%, 60%, 70%, 80%, 100%; the warning effective duty cycle duration is 10s, 15s, 20s, 25s, 35s, 40s, 50s, and the least squares method is used to estimate the parameters. and , the objective function is optimized by gradient descent method. , .

[0147] For long-term warning, a timed warning is used, and an warning is initiated every hour. The effective warning time within one hour is the short-term warning time, which is 20 minutes.

[0148] Through comprehensive calculation, the short-cycle power consumption is reduced to 17%-83% of the original, and the long-cycle power consumption is reduced to 6%-27% of the original. After the control method shown in this embodiment is adopted, on the one hand, the overall power consumption of the node can be reduced; on the other hand, through short-cycle warning and long-cycle warning, the loss caused by missing the warning information can be avoided.

[0149] The present invention also provides a low-power geological disaster early warning and disaster relief device, such as Figure 6 As shown, specifically including:

[0150] Undirected weighted graph drawing module: used to draw an undirected weighted graph according to the deployment of early warning units in the disaster area;

[0151] Information transmission module: used to take the starting node as the initial current node, search for candidate nodes near the current node, and select the optimal candidate node based on the sum of the distances between the candidate node and the current node and the target node, the current remaining power of the candidate node and the current signal strength, and transmit information to the optimal candidate node until the information is transmitted to the target node.

[0152] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

Claims

1. A low-power geological disaster early warning and disaster relief method, characterized in that: include: Undirected weighted graph drawing step: drawing an undirected weighted graph according to the deployment of the early warning units in the disaster area, each of the early warning units corresponds to a node; Information transmission step: taking the starting node as the current node, searching for candidate nodes near the current node, and selecting the best candidate node according to the sum of the distances between the candidate node and the current node and the target node, the estimated remaining power of the candidate node, and the real-time signal strength of the candidate node, transmitting information to the best candidate node, taking the best candidate node as the new current node, and continuing to search for the candidate nodes near the node until the information is transmitted to the target node; In the information transmission step, the path node value is calculated according to the sum of the distances of the candidate node from the current node and the target node, the estimated remaining power of the candidate node, and the real-time signal strength, and the candidate node with the largest path node value is selected as the optimal candidate node; When the transmitted information is a data transmission instruction, the calculation formula of the path node value is: , in, for The current node at the time The path node value of for The candidate node at the time After the last transmission and update of the above information, the estimated remaining power is for The candidate node at the time Real-time signal strength, For the current node The number of nearby nodes to be selected, for The candidate node at the time Respectively with the current node and the target node The sum of the distances, for The remaining power limit factor at any time, for The signal strength limiting factor at the moment; The remaining power limit factor at the moment The calculation formula is: , in, To conserve the remaining power; Signal strength limiting factor at the moment The calculation formula is: , in, is a conservative signal strength.

2. The low-power geological disaster early warning and disaster relief method according to claim 1 is characterized in that: The undirected weighted graph is ; in, is the set of nodes, , is the set of all links between the nodes, , where the node and nodes The link between .

3. The low-power geological disaster early warning and disaster relief method according to claim 2 is characterized in that: In the information transmission step, the path node value is calculated according to the sum of the distances of the candidate node from the current node and the target node, the estimated remaining power of the candidate node, and the real-time signal strength, and the candidate node with the largest path node value is selected as the optimal candidate node; When the transmitted information is a warning instruction, the calculation formula of the path node value is: 。 4. The low-power geological disaster early warning and relief method according to claim 3 is characterized in that: The candidate node at the time Respectively with the current node and the target node The sum of the distances The calculation formula is: , in, for The current node at the time and the candidate node The distance between for The candidate node at the time With the target node The distance between The calculation formulas are: , The current node The coordinates are: ; The node to be selected The coordinates are: ; The target node The coordinates are: .

5. The low-power geological disaster early warning and disaster relief method according to claim 4 is characterized in that: The information transmission step also includes: Update node status step: The node The node status is transmitted to the server node, wherein the node status includes the estimated remaining power and the real-time signal strength; The node exist The estimated remaining power at the time for: , in, for The node at the moment The actual remaining power, According to the node The estimated average power increment obtained by the transmit power consumption, receive power consumption, sleep power consumption, event power consumption and current charging efficiency, the estimated remaining power and the actual remaining power are both measured in percentage; The estimated average power increase at the time The calculation formula is: , in, for The average value of the current loss and the charging current increment at each moment, for After the information transmission is completed, the node The return cycle, for After the information transmission is completed, the node The return cycle, For Node The electrical energy capacity, The calculation formula is: , in, for The charging current at the moment, for The emission current at the moment, for The receiving current at the moment, for The event loss current at the moment; Get the node exist Measured signal strength at the time , and as The real-time signal strength at the moment .

6. The low-power geological disaster early warning and relief method according to claim 5 is characterized in that: The node at the moment The return cycle and The node at the moment The return cycle The relationship between them is: , in, is the adjustment factor of the feedback period; Modulating Factor The calculation formula is: , in, The remaining power limit.

7. The low-power geological disaster early warning and disaster relief method according to claim 6 is characterized in that: like and When can be selected as the optimal candidate node for transmitting data transmission instructions and early warning instructions; like or When Only the optimal candidate node can be selected as the node for transmitting the early warning instruction and the node status.

8. A low-power geological disaster early warning and relief system using the method according to any one of claims 1 to 7, characterized in that: include: Early warning unit; The early warning unit includes: a first early warning unit, a second early warning unit, an indication unit, a monitoring unit and a relay unit; The first warning unit is an outdoor broadcaster, which is deployed outdoors. The network module uses a combination of a 4G module and a Lora module to route and aggregate node information of each unit to upload data to the server. The second early warning unit is an indoor sound and light alarm, which is deployed indoors, and the network module adopts the Lora module; The indication unit is an outdoor escape indicator, which is deployed outdoors. The network module adopts the Lora module, which can be used to guide people to escape when a disaster occurs; The monitoring unit is a disaster monitoring device deployed outdoors. The network module adopts a Lora module with a built-in early warning model. It has the function of directly sending early warning instructions to the first early warning unit, the second early warning unit and the indication unit according to different situations, and at the same time sends data and status information to the server through the first early warning unit; The relay unit is deployed between the first warning unit, the second warning unit, the indication unit, and the monitoring unit. It is used to perform the relay routing function and adopts the Lora module for the network module.

9. A low-power geological disaster early warning and disaster relief device, characterized in that: include: Undirected weighted graph drawing module: used to draw an undirected weighted graph according to the deployment of early warning units in the disaster area; Information transmission module: used to take the starting node as the initial current node, search for candidate nodes near the current node, and select the best candidate node according to the sum of the distances between the candidate node and the current node and the target node, the current remaining power of the candidate node and the current signal strength, and transmit information to the best candidate node until the information is transmitted to the target node; The information transmission module is used to calculate the path node value according to the sum of the distances between the candidate node and the current node and the target node, the estimated remaining power of the candidate node, and the real-time signal strength, and select the candidate node with the largest path node value as the optimal candidate node; When the transmitted information is a data transmission instruction, the calculation formula of the path node value is: , in, for The current node at the time The path node value of for The candidate node at the time After the last transmission and update of the above information, the estimated remaining power is for The candidate node at the time Real-time signal strength, For the current node The number of nearby nodes to be selected, for The candidate node at the time Respectively with the current node and the target node The sum of the distances, for The remaining power limit factor at any time, for The signal strength limiting factor at the moment; The remaining power limit factor at the moment The calculation formula is: , in, To conserve the remaining power; Signal strength limiting factor at the moment The calculation formula is: , in, is a conservative signal strength.

Images