Ammeter acquisition method and system based on Lora radio frequency ad hoc network

Abstract

The invention relates to the technical field of ammeter data acquisition, in particular to an ammeter acquisition method and system based on a Lora radio frequency ad hoc network. The acquisition method comprises the following steps: a node acquires first ammeter data of local ammeter equipment according to an acquisition strategy; the node sends total electricity meter data including the first electricity meter data to a forwarding node or a main router; when the data transmission fails, the node stores the total ammeter data to a local memory; and after the communication is reconstructed, the node calls the total ammeter data which are not successfully sent in the local memory and resends the total ammeter data. The acquisition system and method provided by the invention have the advantages of fast networking and fast deployment. And the problems of complex communication and difficult wiring between devices are greatly solved. For a large amount of dense electric meter equipment, such as a high-voltage power distribution room scene, rapid and comprehensive acquisition can be performed, and the installation position can be rapidly positioned.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric meter data collection, and in particular relates to an electric meter data collection method and system based on a Lora radio frequency ad hoc network. Background Art

[0002] Existing meter data collection methods are divided into two types: wired communication and wireless communication.

[0003] Among them, wired communication adopts bus type, which has the following disadvantages: wiring is difficult; when a node is short-circuited, the entire bus communication will fail, and it is difficult to locate and find the address of the faulty node.

[0004] The disadvantages of existing wireless communications include: being restricted by communication distance, device power limitations, and surrounding wireless interference, resulting in a very low acquisition success rate. Summary of the invention

[0005] In view of the above problems, the present invention provides an electric meter data collection method based on Lora radio frequency ad hoc network, and the data collection method comprises: The node collects first electric meter data of the local electric meter device according to the collection strategy; The node sends the total electricity meter data including the first electricity meter data to the forwarding node or the main router; When the node fails to send data, it stores the total meter data in the local memory; after the communication is reestablished, the node retrieves the total meter data that has not been sent successfully in the local memory and resends it.

[0006] Further, the node receives and sends the address data of the current node according to the networking request data, thereby completing the communication networking; After each binding between the node and the local electric meter device is completed, the address data of the current node is sent to complete the communication networking.

[0007] Furthermore, when the address data sent by other nodes and received by the node is the same as the address data of the current node, the address negotiation strategy is executed.

[0008] Furthermore, the node monitors the current communication channel status in real time, and jumps to the communication channel when the communication channel is occupied for a time exceeding a preset value.

[0009] Further, sending the total electric meter data includes: When the communication signal strength of the current node is lower than the preset value, the current node sends the total electricity meter data to the forwarding node; When the communication signal strength of the current node is not less than the preset value, the current node sends the total electricity meter data to the main router.

[0010] Furthermore, the node receives and forwards total electricity meter data sent by other nodes.

[0011] Furthermore, the forwarding node selection method includes: The current node receives and analyzes the data signals sent by other nodes in real time; and compares and determines the node with the best current signal strength as the receiving node.

[0012] Furthermore, the collection method also includes: The main router sends networking request data according to the networking strategy, receives address data sent by each node, and completes the communication networking; The main router receives the total electricity meter data sent by the node.

[0013] The present invention also provides an electric meter collection system based on the Lora radio frequency ad hoc network, wherein the collection system includes at least one main router and several nodes; The node is used to collect first meter data of a local meter device according to a collection strategy; to send total meter data including the first meter data to a forwarding node or a main router; to store the total meter data in a local memory when data transmission fails; and to retrieve and resend the total meter data that has not been successfully transmitted in the local memory after communication is reestablished; The main router is used to send networking request data according to the networking strategy, receive address data sent by each node, and complete communication networking; and is used to receive total electric meter data sent by the node.

[0014] Furthermore, the acquisition system also includes a local memory for storing the total electric meter data that has not been successfully sent by the current node.

[0015] The beneficial effects of the present invention are: 1. The acquisition system provided by the present invention can add new node devices or routers at any time to achieve the robustness of the system network. In addition, the acquisition system is a distributed wireless communication, without a master-slave relationship, and can be freely networked.

[0016] 2. To prevent signal collision, each node will delay responding to the node address to ensure that the networking process is smooth and reliable.

[0017] 3. Each node determines the communication signal strength of itself and other nodes in real time, and uses the node with the strongest signal as the forwarding node for data transmission in the next frame of communication, thereby improving the stability of system data transmission.

[0018] 4. When the sampling cycle is not frequent, for example, when the total table information is collected only once a day, the air wake-up technology is used to enable the collection system to achieve ultra-low power consumption mode, extending the node operation time. In this case, the node can be powered by a replaceable battery, which can achieve quick installation, reduce the layout of power lines, and greatly simplify the installation difficulty.

[0019] 5. By setting up local storage, when the communication network of the acquisition system is rebuilt or a local node fails, data can be saved for a long time and resent after the communication network is rebuilt. This ensures that the collected data is continuous and complete, and improves the stability of the acquisition system.

[0020] 6. Implement hot repair of the acquisition system communication network through event-driven method, solving the problem of low node communication success rate; regularly re-network at fixed intervals to ensure network integrity and system connectivity.

[0021] 7. The data collection system provided by the present invention has the advantages of rapid networking and rapid deployment. It greatly solves the problems of complex communication and difficult wiring between devices. For a large number of densely packed electric meter devices, such as high-voltage distribution room scenes, rapid and comprehensive data collection can be performed to quickly locate the installation location.

[0022] Other features and advantages of the present invention will be described in the following description, and partly become obvious from the description, or be understood by implementing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram showing a flow chart of a collection method according to an embodiment of the present invention is shown; Figure 2 A schematic diagram of the structure of a collection system according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0025] 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.

[0026] The embodiment of the present invention provides an electric meter collection method based on Lora radio frequency ad hoc network, such as Figure 1 As shown, the collection method includes: S1. The node collects first electric meter data of a local electric meter device according to a collection strategy.

[0027] Specifically, the collection system includes a main router and several nodes. The collection system adopts distributed communication. Each node corresponds to an electric meter device. Each electric meter device is a local electric meter device of its corresponding node and a non-local electric meter device of other nodes. After the new node is installed, the new node is bound to the corresponding local electric meter device and the first electric meter data of the local electric meter device is collected according to the collection strategy.

[0028] Furthermore, after the node is installed, it automatically scans the communication address of the local meter device through the Modbus RTU protocol to complete the one-to-one binding operation between the node and the local meter device, effectively reducing the workload of node installation and debugging.

[0029] Specifically, the collection strategy includes timed collection and / or instruction collection.

[0030] Exemplarily, the node periodically collects the first electric meter data of the local electric meter device according to a preset interval time; the node may also collect the first electric meter data of the local electric meter device according to a collection instruction.

[0031] The first electric meter data includes but is not limited to one or more of a communication address of a local electric meter device, a collection time, a current current, a current voltage, and a total power consumption.

[0032] Furthermore, the collection method also includes: S11, the node receives and sends the address data of the current node according to the networking request data, completing the communication networking.

[0033] Exemplarily, after receiving the networking request data broadcast by the main router, the current node replies with 2 bytes of address data composed of CPUID. The main router receives the address data of the current node and completes the communication connection with the current node.

[0034] Preferably, the node receives and sends the address data of the current node with a delay according to the networking request data.

[0035] To prevent signal collision, each node will delay responding to the node address to ensure that the networking process is smooth and reliable.

[0036] Further preferably, the delay duration is a random duration.

[0037] Reduce the probability of overlapping delay durations of each node to prevent collision of delayed response signals.

[0038] Further preferably, the delay duration of each of the nodes is different.

[0039] Ensure that the response signals of each node will not collide or conflict, and ensure that the networking process is smooth and reliable.

[0040] Furthermore, the collection method also includes: S12: When the address data sent by other nodes and received by the node are the same as the address data of the current node, the address negotiation strategy is executed.

[0041] Specifically, the address negotiation strategy includes but is not limited to changing address data.

[0042] For example, if the current node receives a reply data frame with the same address as its own, it indicates that there is an address conflict in the system network. At this time, the current node can randomly change the address data and resend the changed new address data; or it can use the new address data assigned by the main router.

[0043] Preferably, the collection method further comprises: S13. After each binding between the node and the local electric meter device is completed, the address data of the current node is sent to complete the communication networking.

[0044] After each successful binding between the node and the local electric meter device, the node can actively broadcast its own address data to the collection system and actively communicate and network without receiving networking request data.

[0045] The acquisition system provided by the present invention can add new node devices or routers at any time to achieve the robustness of the system network. In addition, the acquisition system is a distributed wireless communication without a master-slave relationship and can be freely networked.

[0046] Furthermore, the collection method also includes: S14. The node monitors the current communication channel status in real time. When the communication channel is occupied for a time exceeding a preset value, the communication channel is jumped.

[0047] Exemplarily, when a node detects that the current communication channel is occupied for a long time, the current node will automatically hop to the next communication channel to wait for receiving networking request data.

[0048] Furthermore, the collection method also includes: S15, the node receives and jumps to the communication channel according to the query data sent by the main router.

[0049] Specifically, the query data includes the channel information of the next frame of data transmission set by the router. The node that receives the query data will automatically jump to the specified communication channel to send and receive data, thereby realizing frequency hopping communication. By realizing frequency hopping communication, the problem of co-channel interference can be effectively solved.

[0050] S2. The node sends the total electricity meter data including the first electricity meter data to a forwarding node or a main router.

[0051] Specifically, sending the total electric meter data includes: S21, when the communication signal strength of the current node is lower than a preset value, the current node sends the total electric meter data to the forwarding node; S22. When the communication signal strength of the current node is not lower than a preset value, the current node sends the total electricity meter data to the main router.

[0052] When the communication signal quality of the current node is poor, other nodes can be selected as forwarding nodes to forward their total meter data to ensure that data collection and transmission are complete and timely.

[0053] Exemplarily, the collection system includes a main router, node 1 and node 2. When the last frame signal is sent, the signal strength of node 1 and node 2 is higher than the preset value. Node 1 records the meter data A of the local meter device collected by it as the first meter data and sends it to the main router; node 2 records the meter data B of the local meter device collected by it as the first meter data and sends it to the main router.

[0054] For another example, when the previous frame of signal is sent, the signal strength of node 1 is lower than the preset value, and the signal strength of node 2 is higher than the preset value. When the next frame of meter data is sent, node 1 uses node 2 as its forwarding node. Node 1 sends the meter data A of the local meter device it collects to node 2; node 2 receives the meter data A sent by node 1; node 2 records the meter data B of the local meter device it collects as the first meter data, and sends the meter data A and meter data B to the main router.

[0055] Furthermore, the total meter data also includes second meter data; the second meter data refers to meter data of a non-local meter device, including but not limited to one or more of a communication address, collection time, current current, current voltage and total power consumption of the non-local meter device.

[0056] Furthermore, the collection method also includes: S23. The node receives and forwards the total electricity meter data sent by other nodes.

[0057] When the current node is selected as a forwarding node by other nodes, the other nodes will send their total electricity meter data to the current node, and the current node will forward the data.

[0058] Preferably, the forwarding node selection method includes: S211, the current node receives and analyzes data signals sent by other nodes in real time; and compares and determines the node with the best current signal strength as the receiving node.

[0059] Exemplarily, the collection system includes a main router, node 1, node 2, node 3 and node 4. When the previous frame of signal is sent, node 1 can receive the signals sent by node 2 and node 3, and compare to determine that the signal strength of node 2 is higher than that of node 1 and node 3. When the next frame of meter data is collected and sent, node 1 selects node 2 as its forwarding node. Node 1 sends the meter data A of the local meter device collected by it to node 2; node 2 receives the meter data A sent by node 1 and records it as the second meter data; node 2 records the meter data B of the local meter device collected by it as the first meter data, and sends the first meter data and the second meter data to the main router.

[0060] It should be noted that the second electric meter data may be empty, or may include electric meter data of one or more non-local electric meter devices.

[0061] Exemplarily, the collection system includes a main router, node 1, node 2, node 3 and node 4. When the previous frame signal is sent, node 1 can receive the signal sent by node 2 and node 3, and compare to determine that the signal strength of node 2 is higher than that of node 1 and node 3; node 2 can receive the signal sent by node 1 and node 4, and compare to determine that the signal strength of node 4 is higher than that of node 1 and node 2.

[0062] When the next frame of meter data is collected and sent, node 1 selects node 2 as its forwarding node, and node 2 selects node 4 as its forwarding node. Node 1 sends its total meter data p to node 2. The first meter data in the total meter data p is the meter data A of the local meter device collected by node 1, and the second meter data is empty. Node 2 sends its total meter data q to node 4. The first meter data in the total meter data q is the meter data B of the local meter device collected by node 2, and the second meter data is meter data A. Node 4 sends its total meter data x to the main router. The first meter data in the total meter data x is the meter data C of the local meter device collected by node 4, and the second meter data is meter data A and meter data B.

[0063] Each node determines the communication signal strength of itself and other nodes in real time, and uses the node with the strongest signal as the forwarding node for data transmission in the next frame of communication, thereby improving the stability of system data transmission.

[0064] Preferably, the node is in a dormant state of only receiving a data signal preamble during non-collection time; and enters a data signal receiving state upon receiving a specific preamble.

[0065] Exemplarily, the data signal format sent by the main router and each node includes: a packet header, data segment 1, data segment 2, ..., data segment N and a check code. The packet header includes a leading code, an address code, a rolling code and a data segment count. Each data segment may contain valid information of an electric meter device, which can be used to store the electric meter data sent by the previous node or the electric meter data collected by the current node.

[0066] In the sleep state, the node only receives the preamble of the data signal. When receiving a specific preamble, the node will be released from the sleep state and enter the receiving state, ready to receive the data signal from the sender. If no data signal is received within a certain period of time, the node will automatically return to the sleep state and wait for the next wake-up signal.

[0067] In the case of infrequent sampling cycles, for example, when the total table information needs to be collected only once a day, the air wake-up technology can be used to enable the collection system to achieve ultra-low power consumption mode, extending the node operation time. In this case, the node can be powered by a replaceable battery, which can achieve quick installation, reduce the layout of power lines, and greatly simplify the installation difficulty.

[0068] S3. When data transmission fails, the node stores the total electric meter data in the local memory; after communication is reestablished, the node retrieves the total electric meter data that has not been successfully transmitted from the local memory and resends it.

[0069] Specifically, a local memory is set at each node to store the total meter data that has not been successfully sent in the local memory when the communication network of the current node is interrupted and the data signal cannot be sent or received. When the communication network between the current node and the collection system is rebuilt and communication is restored, the current node retrieves the total meter data that has not been successfully sent in the local memory and resends it to the forwarding node or the main router.

[0070] Specifically, the local memory may be integrated in the node, or an external memory may be used.

[0071] Exemplarily, the local memory adopts an off-chip Flash memory.

[0072] By setting up local storage, when the communication network of the acquisition system is rebuilt or a local node fails, data can be saved for a long time and resent after the communication network is rebuilt, ensuring the continuity and integrity of the acquired data and improving the stability of the acquisition system.

[0073] It should be noted that when the current node acts as a forwarding node and the communication network is interrupted, the total meter data includes meter data of non-local meter devices reported by other nodes, which are also stored in the local memory and resent after the communication network is reestablished.

[0074] Furthermore, the collection method also includes: S4. The main router sends networking request data according to the networking strategy, receives address data sent by each node, and completes the communication networking.

[0075] Specifically, the networking strategy includes scheduled sending or event-driven sending.

[0076] The timed sending means that the main router periodically sends the networking request data at a preset interval to regularly re-network the system.

[0077] For example, every 48 hours, the main router will broadcast the network request data to re-network the system. When the address data of all nodes are reported to the main router or the main router waits for the maximum time, the communication network of the entire acquisition system is established.

[0078] The event-driven mode means that the main router sends the networking request data in time according to the operation instruction to re-network the system.

[0079] For example, when more than a preset number of nodes lose network connection, the main router meets the trigger condition, executes the re-networking operation instruction, broadcasts the network request data, and re-networks the system. When the address data of all nodes is reported to the main router or the main router waits for the maximum time, the communication network of the entire acquisition system is established.

[0080] The hot repair of the acquisition system communication network is achieved through event-driven method, which solves the problem of low node communication success rate; the integrity of the network and the connectivity of the system are ensured by regular re-networking at fixed intervals.

[0081] Preferably, the collection method further comprises: S41. The main router sends networking request data and / or query data in multiple communication channels.

[0082] For example, the main router broadcasts networking request data and query data in 10 communication channels, and the query data includes the communication channel information of the next frame of data signal. The node that receives the query data will automatically jump to the specified communication channel to send and receive data. By implementing frequency hopping communication, the problem of co-channel interference can be effectively solved.

[0083] Furthermore, the collection method also includes: S5. The main router receives the total electricity meter data sent by the node.

[0084] The main router finally receives the total meter data collected by each node and uploads all the total meter data through the RS485 bus.

[0085] In order to realize the above-mentioned electric meter collection method based on Lora radio frequency self-organizing network, an embodiment of the present invention also provides an electric meter collection system based on Lora radio frequency self-organizing network, and the collection system includes at least one main router and several nodes, and a wireless communication network is established between the main router and the nodes.

[0086] The node is used to collect first meter data of a local meter device according to a collection strategy; to send total meter data including the first meter data to a forwarding node or a main router; to store the total meter data in a local memory when data transmission fails; and to retrieve and resend the total meter data that has not been successfully sent in the local memory after communication is reestablished.

[0087] The main router is used to send networking request data according to the networking strategy, receive address data sent by each node, and complete communication networking; and is used to receive total electric meter data sent by the node.

[0088] For example, Figure 2 As shown, the acquisition system consists of a Lora router connecting N (maximum 128) nodes to form a communication network. The central frequency of the communication network will be set in the range of 470-510MHz according to the project, and 10 communication channels are specified. Each node corresponds to an electric meter device, and each electric meter device is a local electric meter device of its corresponding node and a non-local electric meter device of other nodes. After the new node is installed, it automatically scans the communication address of the local electric meter device through the Modbus RTU protocol to complete the one-to-one binding operation between the new node and the local electric meter device. Each node collects the first electric meter data of the local electric meter device according to the acquisition strategy. The node sends the collected electric meter data to the forwarding node or the main router; the main router finally receives the total electric meter data collected by each node, and uploads all the total electric meter data through the RS485 bus.

[0089] The acquisition system adopts a distributed network design, and each node is responsible for both communication and network maintenance to improve network connectivity.

[0090] Preferably, the acquisition system further includes a local memory for storing total electric meter data that has not been successfully sent by the current node.

[0091] Specifically, a local memory is set at each node to store the total meter data that has not been successfully sent in the local memory when the communication network of the current node is interrupted and the data signal cannot be sent or received. When the communication network between the current node and the collection system is rebuilt and communication is restored, the current node retrieves the total meter data that has not been successfully sent in the local memory and resends it to the forwarding node or the main router.

[0092] Specifically, the local memory may be integrated in the node, or an external memory may be used.

[0093] Exemplarily, the local memory adopts an off-chip Flash memory.

[0094] By setting up local storage, when the communication network of the acquisition system is rebuilt or a local node fails, data can be saved for a long time and resent after the communication network is rebuilt, ensuring the continuity and integrity of the acquired data and improving the stability of the acquisition system.

[0095] Further preferably, the node can be powered by a replaceable battery; the node is in a dormant state of only receiving a data signal preamble during non-collection time; and enters a data signal receiving state upon receiving a specific preamble.

[0096] In the sleep state, the node only receives the preamble of the data signal. When receiving a specific preamble, the node will be released from the sleep state and enter the receiving state, ready to receive the data signal from the sender. If no data signal is received within a certain period of time, the node will automatically return to the sleep state and wait for the next wake-up signal.

[0097] In the case of infrequent sampling cycles, for example, when the total table information needs to be collected only once a day, the air wake-up technology can be used to enable the collection system to achieve ultra-low power consumption mode, extending the node operation time. In this case, the node can be powered by a replaceable battery, which can achieve quick installation, reduce the layout of power lines, and greatly simplify the installation difficulty.

[0098] Further preferably, the node is also used to monitor the current communication channel status in real time, and when the communication channel is occupied for a time exceeding a preset value, the node jumps to the communication channel.

[0099] When a node detects that the current communication channel is occupied for a long time, it will automatically hop to the next communication channel to wait for receiving networking request data.

[0100] Further preferably, the main router is also used to send networking request data and / or query data in multiple communication channels; The node is also used to receive and send the address data of the current node according to the networking request data; and to receive and jump the communication channel according to the query data sent by the main router.

[0101] For example, the main router broadcasts the networking request data and query data in 10 communication channels. After receiving the networking request data broadcast by the main router, the current node replies with 2 bytes of address data composed of CPUID. The main router receives the address data of the node and completes the communication connection with the node.

[0102] The query data includes the communication channel information of the next frame of data signal. The node that receives the query data will automatically jump to the specified communication channel to send and receive data. By implementing frequency hopping communication, the problem of co-frequency interference can be effectively solved.

[0103] Furthermore, the node is also used to send the total electricity meter data to the forwarding node when the communication signal strength is lower than a preset value; and to send the total electricity meter data to the main router when the communication signal strength is not lower than a preset value.

[0104] When the communication signal quality of the current node is poor, other nodes can be selected as forwarding nodes to forward their total meter data to ensure that data collection and transmission are complete and timely.

[0105] The data collection system provided by the present invention has the advantages of rapid networking and rapid deployment. It greatly solves the problems of complex communication and difficult wiring between devices. For a large number of densely packed electric meter devices, such as high-voltage distribution room scenarios, rapid and comprehensive data collection can be performed to quickly locate the installation location.

[0106] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for collecting electric meter data based on Lora radio frequency ad hoc network, characterized in that: The collection method comprises: The node collects first electric meter data of the local electric meter device according to the collection strategy; The node sends the total electricity meter data including the first electricity meter data to the forwarding node or the main router; When the node fails to send data, it stores the total meter data in the local memory; after the communication is reestablished, the node retrieves the total meter data that has not been sent successfully in the local memory and resends it; The acquisition strategy includes timing acquisition and / or instruction acquisition.

2. The method for collecting electricity meter data based on Lora RF ad hoc network according to claim 1 is characterized in that: The node receives and sends the address data of the current node according to the networking request data, thereby completing the communication networking; After each binding between the node and the local electric meter device is completed, the address data of the current node is sent to complete the communication networking.

3. The electric meter data collection method based on Lora radio frequency ad hoc network according to claim 2 is characterized in that: When the address data sent by other nodes and received by the node are the same as the address data of the current node, an address negotiation strategy is executed; The address negotiation strategy includes change address data.

4. The electric meter data collection method based on Lora radio frequency ad hoc network according to claim 1 is characterized in that: The node monitors the current communication channel status in real time, and jumps to the communication channel when the communication channel is occupied for a time exceeding a preset value.

5. The electric meter data collection method based on Lora radio frequency ad hoc network according to claim 1 is characterized in that: Sending the total electric meter data includes: When the communication signal strength of the current node is lower than the preset value, the current node sends the total electricity meter data to the forwarding node; When the communication signal strength of the current node is not less than the preset value, the current node sends the total electricity meter data to the main router.

6. The method for collecting electricity meter data based on Lora RF ad hoc network according to claim 5 is characterized in that: The node receives and forwards the total electricity meter data sent by other nodes.

7. The method for collecting electric meter data based on Lora RF ad hoc network according to claim 1 or 5, characterized in that: The forwarding node selection method includes: The current node receives and analyzes the data signals sent by other nodes in real time; and compares and determines the node with the best current signal strength as the receiving node.

8. The method for collecting electricity meter data based on Lora radio frequency ad hoc network according to claim 1 is characterized in that: The collection method also includes: The main router sends networking request data according to the networking strategy, receives address data sent by each node, and completes the communication networking; The main router receives the total electricity meter data sent by the node; The networking strategy includes scheduled sending or event-driven sending; The timed sending means that the main router periodically sends the networking request data at a preset interval to regularly re-network the system; The event-driven mode means that the main router sends the networking request data in time according to the operation instruction to re-network the system.

9. An electric meter data collection system based on Lora radio frequency ad hoc network, characterized in that: The acquisition system includes at least one main router and several nodes; The node is used to collect first electric meter data of a local electric meter device according to a collection strategy; Used to send the total electric meter data including the first electric meter data to the forwarding node or the main router; Used to store the total electric meter data into the local memory when data transmission fails; Used to retrieve the total electric meter data that has not been successfully sent in the local memory and resend it after the communication is reestablished; The main router is used to send networking request data according to the networking strategy, receive address data sent by each node, and complete the communication networking; Used to receive the total electric meter data sent by the node; The acquisition strategy includes timing acquisition and / or instruction acquisition; The networking strategy includes scheduled sending or event-driven sending; The timed sending means that the main router periodically sends the networking request data at a preset interval to regularly re-network the system; The event-driven mode means that the main router sends the networking request data in time according to the operation instruction to re-network the system.

10. An electric meter data collection system based on Lora radio frequency ad hoc network, characterized in that: The acquisition system also includes a local memory for storing total electric meter data that has not been successfully sent by the current node.

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