Wireless communication method, battery power monitoring method, electronic device, and storage medium

Abstract

The application provides a wireless communication method, a battery power monitoring method, an electronic device and a storage medium. A wireless sensor network comprises a sink node and a plurality of sensor nodes. In an initial state, the radio frequency modules of the sink node and the sensor nodes are in a wireless receiving state. The wireless communication method comprises: receiving an upload monitoring data instruction; switching from the wireless receiving state to a wireless sending state; sending a first broadcast packet to the sink node, wherein the first broadcast packet comprises a wireless sensor network identification code, a sink node identification code, a sensor node identification code of the node, and an upload beacon identification code; the upload beacon identification code is used to prompt the sink node to send a first connection request packet to the sensor node; switching from the wireless sending state to the wireless receiving state; receiving the first connection request packet; establishing a wireless connection with the sink node and uploading monitoring data. The wireless communication method can avoid congestion caused by too many nodes.

Description

Technical Field

[0001] This application relates to the field of wireless communication technology, and in particular to wireless communication methods, battery power monitoring methods, and storage media. Background Technology

[0002] Large-scale data acquisition can generally be achieved through fieldbus technology. For monitoring scenarios with high node density, the drawbacks of using wired transmission methods such as fieldbus are particularly obvious. Specifically, the large increase in wire bundles puts demands on the physical space of the system, and the actual system cost also increases accordingly.

[0003] With the continuous development of IoT technology, data monitoring systems based on wireless sensor networks are being increasingly widely used in military, environmental monitoring, smart agriculture, and healthcare fields. Currently, typical wireless sensor networks are mesh networks characterized by self-organization and multi-hop transmission. In scenarios with a large number of nodes and high density, data congestion and mutual interference are prone to occur. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the purpose of this application is to provide a wireless communication method based on a wireless sensor network to solve the communication congestion problem caused by a large number of nodes in the prior art.

[0005] In a first aspect, this application provides a wireless communication method based on a wireless sensor network. The wireless sensor network includes a sink node and multiple sensor nodes. The sensor nodes are used to collect monitoring data. Both the sink node and the sensor nodes are equipped with radio frequency modules for transmitting and receiving wireless signals. The wireless communication method is applied to the sensor node side in an initial state, where the radio frequency modules of both the sink node and the sensor nodes are in a wireless receiving state. The wireless communication method includes:

[0006] Receive instructions to upload monitoring data;

[0007] Transitioning from wireless receiving state to wireless transmitting state;

[0008] A first broadcast packet is sent to the aggregation node. The first broadcast packet includes a wireless sensor network identifier, an aggregation node identifier, a sensor node identifier of the local node, and an upload beacon identifier. The upload beacon identifier is used to prompt the aggregation node to send a first connection request packet to the sensor node.

[0009] Transitioning from wireless transmit state to wireless receive state;

[0010] Receive the first connection request packet;

[0011] Establish a wireless connection with the aggregation node and upload monitoring data.

[0012] In one implementation of the first aspect, the triggering conditions for the upload monitoring data instruction include:

[0013] The remaining storage space of the sensor node is less than a preset threshold; and / or

[0014] The monitoring data collected by the sensor node falls within a preset range; and / or

[0015] The sensor node's self-test result indicates a device malfunction.

[0016] In one implementation of the first aspect, the wireless sensor network is a star network, and the number of sensor nodes in the same wireless sensor network is greater than 200.

[0017] In one implementation of the first aspect, the communication protocol between the aggregation node and the sensor node is the Bluetooth protocol.

[0018] In one implementation of the first aspect, the first broadcast packet is a connectable non-directional broadcast packet.

[0019] In one implementation of the first aspect, the wireless communication method further includes:

[0020] Receive commands to join a wireless sensor network;

[0021] Transitioning from wireless receiving state to wireless transmitting state;

[0022] A second broadcast packet is sent to the aggregation node. The first broadcast packet includes the sensor node identification code of this node and the beacon joining identification code; the beacon joining identification code is used to prompt the aggregation node to send a second connection request packet to the sensor node.

[0023] Transitioning from wireless transmit state to wireless receive state;

[0024] Receive the second connection request packet;

[0025] Establish a wireless connection with the aggregation node and obtain the wireless sensor network identification code and the aggregation node identification code.

[0026] Secondly, this application provides a wireless communication method based on a wireless sensor network. The wireless sensor network includes a aggregation node and multiple sensor nodes. The sensor nodes are used to collect monitoring data. Both the aggregation node and the sensor nodes are equipped with radio frequency modules for transmitting and receiving wireless signals. The wireless communication method is applied to the aggregation node. Initially, the radio frequency modules of both the aggregation node and the sensor nodes are in a wireless receiving state. The wireless communication method includes:

[0027] Receive a command to read monitoring data, wherein the command includes a target sensor node identification code;

[0028] Transitioning from wireless receiving state to wireless transmitting state;

[0029] A third broadcast packet is sent to the sensor node, the third broadcast packet including a wireless sensor network identifier, a target sensor node identifier, and a read beacon identifier; the read beacon identifier is used to prompt the sensor node to send a third connection request packet to the aggregation node;

[0030] Transitioning from wireless transmit state to wireless receive state;

[0031] Receive the third connection request packet;

[0032] Establish a wireless connection with the sensor node and read the monitoring data.

[0033] Thirdly, this application provides an electronic device, including a memory and a processor, wherein the processor is configured to execute a computer program stored in the memory to enable the electronic device to perform the wireless communication method based on a wireless sensor network.

[0034] Fourthly, this application provides a computer-readable storage medium storing a computer program thereon, characterized in that the computer program, when executed by a processor, implements the wireless communication method based on a wireless sensor network.

[0035] As described above, the wireless communication method, battery power monitoring method, electronic device, and storage medium described in this application enable the monitoring system to simultaneously achieve both active uploading and passive reading working modes by setting the initial state of each node to receiving state, and ensure that only one wireless link is established for each data exchange, effectively avoiding data congestion when there are too many nodes. Attached Figure Description

[0036] Figure 1 The diagram shows an application scenario of the wireless communication method based on a wireless sensor network as described in one embodiment of this application.

[0037] Figure 2 The flowchart shown is a wireless communication method on one side of the sensor node in one embodiment of this application.

[0038] Figure 3 The flowchart shown is a process of adding a new sensor node to a wireless sensor network according to an embodiment of this application.

[0039] Figure 4 The flowchart shown is a wireless communication method on the aggregation node side of one embodiment of this application.

[0040] Figure 5 The diagram shown is a structural block diagram of an electronic device according to an embodiment of this application. Detailed Implementation

[0041] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, unless otherwise specified, the following embodiments and features in the embodiments can be combined with each other.

[0042] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. Therefore, the drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0043] The power systems of new energy vehicles typically employ hundreds or even thousands of small batteries connected in series and parallel to achieve multiple goals, including increasing output power, enhancing safety, and reducing maintenance costs. Wired transmission methods for monitoring the power levels of these densely packed battery cells present significant wiring challenges. Existing wireless sensor networks are generally suitable for monitoring large areas or a small number of nodes; however, they suffer from severe interference in scenarios with high monitoring density. For example, in self-organizing mesh Bluetooth networks, data delays or congestion can easily occur when multiple links communicate simultaneously.

[0044] like Figure 1 , Figure 2 As shown, this embodiment provides a wireless communication method based on a wireless sensor network. The wireless sensor network includes a sink node and multiple sensor nodes (N1 to N9). The sensor nodes are used to collect monitoring data. Both the sink node and the sensor nodes are equipped with radio frequency modules for transmitting and receiving wireless signals. The wireless communication method is applied to the sensor node side. Initially, the radio frequency modules of both the sink node and the sensor nodes are in a wireless receiving state. The wireless communication method includes:

[0045] Step S110: Receive the instruction to upload monitoring data;

[0046] Step S120: Switch from wireless receiving state to wireless transmitting state;

[0047] Step S130: Send a first broadcast packet to the aggregation node. The first broadcast packet includes a wireless sensor network identification code, an aggregation node identification code, a sensor node identification code of this node, and an upload beacon identification code. The upload beacon identification code is used to prompt the aggregation node to send a first connection request packet to the sensor node.

[0048] Step S140: Switch from wireless transmitting state to wireless receiving state;

[0049] Step S150: Receive the first connection request packet;

[0050] Step S160: Establish a wireless connection with the aggregation node and upload monitoring data.

[0051] In this embodiment, the wireless sensor network is in its initial state upon power-on. After completing one data exchange, each node returns to its initial state. This initial state differs from the ready state of existing Bluetooth systems, where there is no transmit or receive capability. In this invention, each node is in a receiving state during the initial state. Because the sensor nodes of this invention can be powered by the monitored target, a sufficiently long system lifespan can be guaranteed even if each node maintains listening to the broadcast channel during the initial state. During the initial state, the aggregation node stores the wireless sensor network identification code, the aggregation node identification code, and the sensor node identification codes of each sensor node. Each sensor node stores its own sensor node identification code, the wireless sensor network identification code, and the aggregation node identification code. During the initial state, there is no broadcasting by any node, and no mutual interference occurs.

[0052] When one of the sensor nodes receives an instruction to upload monitoring data, it switches to wireless receiving mode and sends a first broadcast packet. The aggregation node compares the wireless sensor network identifier in the first broadcast packet with its own stored wireless sensor network identifier to determine whether the first broadcast packet originates from its own wireless sensor network. For example, two new energy vehicles each have a wireless sensor network for monitoring battery power. When the two vehicles approach each other, the first broadcast packet sent by one vehicle may be received by the other. This invention avoids signal interference between different vehicles by setting a wireless sensor network identifier in the first broadcast packet. This invention further determines the receiving target of the first broadcast packet by setting an aggregation node identifier in the first broadcast packet. Specifically, when other sensor nodes in the same wireless sensor network that have not received the instruction to upload monitoring data compare the aggregation node identifier with their own stored sensor node identifier, they do not respond to the first broadcast packet if a mismatch is found. Only when the aggregation node matches its stored aggregation node identification code and responds to the first broadcast packet can the wireless sensor network of the present invention establish only one wireless link when it needs to actively upload data. Even if the number of nodes far exceeds that of a typical scatter network or mesh network, there will be no problem of delay and congestion.

[0053] After sending the first broadcast packet, the sensor node that needs to upload data automatically switches from wireless transmitting to wireless receiving after a certain interval. At this time, time synchronization is not required; the probability of receiving the first connection request packet can be increased by increasing the window width of the wireless receiving state. If packet reception fails, steps S200 to S500 can be repeated until successful reception. The process from receiving the first connection request packet to establishing a connection and exchanging data can refer to existing short-range wireless communication standards such as WiFi, Bluetooth, and ZigBee, and is not considered a key improvement in this invention.

[0054] In this embodiment, the triggering conditions for step S100 include one or more combinations of the following:

[0055] The remaining storage space of the sensor node is less than a preset threshold. For example, if the historical power consumption data stored on the sensor node reaches 90% of its storage capacity, uploading and deleting the historical power consumption data in a timely manner can prevent data loss due to insufficient storage space.

[0056] The monitoring data collected by the sensor nodes falls within a preset range. For example, if the temperature of one of the batteries exceeds a preset safety threshold, the monitoring data, including temperature, charge level, charging / discharging current, and voltage, can be uploaded to enable timely protective measures such as cooling and power-off to prevent significant losses.

[0057] The sensor node's self-test result indicates a device malfunction. Replace any malfunctioning sensors promptly to ensure the stability of the wireless sensor network.

[0058] In other embodiments, the data upload process can also be triggered manually. After one data upload is completed, the wireless sensor network returns to its initial state.

[0059] In this embodiment, the communication protocol between the aggregation node and the sensor nodes is the Bluetooth protocol. Specifically, Bluetooth 4.2 can be used. The wireless receiving state refers to the scanning state of each node's Bluetooth device, and the wireless transmitting state refers to the broadcast state of each node's Bluetooth device.

[0060] In this embodiment, an encryption protocol is provided at the application layer of the Bluetooth protocol.

[0061] In this embodiment, the wireless sensor network is a star network, and the number of sensor nodes in the same wireless sensor network is greater than 200. The number of child nodes in a local area network based on the existing Bluetooth protocol is limited, making it unsuitable for special scenarios such as battery management in new energy vehicles. The star network structure of this invention can still ensure flexible scalability even when the number of nodes is greater than 200.

[0062] In this embodiment, the first broadcast packet is a connectable non-directional broadcast packet. For example, the Bluetooth data packet type is ADV_IND, in which information such as the wireless sensor network identifier, the aggregation node identifier, the sensor node identifier of this node, and the upload beacon identifier are included in AdvData.

[0063] Specifically, to achieve automatic and scalable configuration of the wireless sensor network, in this embodiment, the wireless communication method further includes:

[0064] Step S210: Receive the command to join the wireless sensor network;

[0065] Step S220: Switch from wireless receiving state to wireless transmitting state;

[0066] Step S230: Send a second broadcast packet to the aggregation node. The first broadcast packet includes the sensor node identification code and the beacon joining identification code of this node. The beacon joining identification code is used to prompt the aggregation node to send a second connection request packet to the sensor node. In this embodiment, the sensor node identification code and the beacon joining identification code can be pre-stored in the storage module of this node.

[0067] Step S240: Switch from wireless transmitting state to wireless receiving state;

[0068] Step S250: Receive the second connection request packet;

[0069] Step S260: Establish a wireless connection with the aggregation node and obtain the wireless sensor network identification code and the aggregation node identification code.

[0070] In this embodiment, the sensor node identification code and the beacon identification code can be pre-stored in the storage module of this node. After the above configuration process, the storage module of each sensor node stores the sensor node identification code, the wireless sensor network identification code, and the aggregation node identification code of this node.

[0071] like Figure 4 As shown, this embodiment provides a wireless communication method based on a wireless sensor network. The wireless sensor network includes a sink node and multiple sensor nodes. The sensor nodes are used to collect monitoring data. Both the sink node and the sensor nodes are equipped with radio frequency modules for transmitting and receiving wireless signals. The wireless communication method is applied to the sink node side. Initially, the radio frequency modules of both the sink node and the sensor nodes are in a wireless receiving state. The wireless communication method includes:

[0072] Step S310: Receive a command to read monitoring data, which includes the target sensor node identification code.

[0073] Step S320: Switch from wireless receiving state to wireless transmitting state;

[0074] Step S330: A third broadcast packet is sent to the sensor node. The third broadcast packet includes a wireless sensor network identification code, a target sensor node identification code, and a read beacon identification code. The read beacon identification code is used to prompt the sensor node to send a third connection request packet to the aggregation node.

[0075] Step S340: Switch from wireless transmitting state to wireless receiving state;

[0076] Step S350: Receive a third connection request packet;

[0077] Step S360: Establish a wireless connection with the sensor node and read the monitoring data.

[0078] This embodiment is used for a host computer communicating with a wireless sensor network to read data collected by each sensor node. The command to read monitoring data in this embodiment can be issued by the host computer. After receiving the third broadcast packet, each sensor node compares the wireless sensor network identification code and the target sensor node identification code with its stored identification code. It only responds to the third broadcast packet if both the wireless sensor network identification code and the target sensor node identification code match, ensuring that only one wireless link is established during a single data reading process, thereby avoiding data congestion caused by too many nodes.

[0079] In this embodiment, the third broadcast packet is a connectable non-directional broadcast packet.

[0080] like Figure 5 As shown, this embodiment provides a method for monitoring the battery power of an electric vehicle. The electric vehicle includes a control module and multiple battery modules. Each battery module is equipped with a sensor node for collecting battery power. Both the sensor nodes and the control module are equipped with radio frequency modules for transmitting and receiving wireless signals. The sensor nodes and the control module form a wireless sensor network with the control module as the aggregation node. In the initial state, the radio frequency modules of both the aggregation node and the sensor nodes are in a wireless receiving state. The wireless communication method includes:

[0081] Step S410: The sensor node receives the instruction to upload monitoring data;

[0082] Step S420: The sensor node switches from wireless receiving state to wireless transmitting state;

[0083] In step S430, the sensor node sends a first broadcast packet to the aggregation node. The first broadcast packet includes a wireless sensor network identification code, an aggregation node identification code, a sensor node identification code of the local node, and an upload beacon identification code.

[0084] Step S440: The aggregation node sends a first connection request packet to the sensor node based on the uploaded beacon identification code;

[0085] Step S450: The sensor node switches from wireless transmitting state to wireless receiving state;

[0086] Step S460: The sensor node receives the first connection request packet;

[0087] In step S470, the sensor node establishes a wireless connection with the aggregation node and uploads monitoring data.

[0088] The scope of protection for the wireless communication method and battery power monitoring method in this application is not limited to the execution order of the steps listed in this embodiment. Any solution implemented by adding, deleting, or replacing steps in the prior art based on the principles of this application is included within the scope of protection of this application.

[0089] like Figure 5 As shown, this embodiment also provides an electronic device, which is a user's mobile device such as a mobile phone, PAD, wearable device, or smart AI device; the electronic device includes a memory for storing computer programs; and a processor for running the computer programs to implement the wireless communication method based on wireless sensor networks in the above embodiments.

[0090] The memory is connected to the processor via a system bus and they communicate with each other. The memory is used to store computer programs, and the processor is used to run the computer programs so that the electronic device executes the wireless communication method based on the wireless sensor network in the above embodiments.

[0091] It should also be noted that the system bus mentioned above can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. This system bus can be divided into address bus, data bus, control bus, etc. For ease of representation, only one thick line is used in the diagram, but this does not indicate that there is only one bus or one type of bus. The communication interface is used to enable communication between the database access device and other devices (such as clients, read-write databases, and read-only databases).

[0092] The processors mentioned above can be general-purpose processors, including central processing units (CPUs), network processors (NPs), etc.; they can also be digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0093] In addition, this embodiment also provides a storage medium storing program instructions, which, when executed by a processor, implement the wireless communication method based on a wireless sensor network as described in the above embodiments.

[0094] Those skilled in the art will understand that all or part of the steps in the methods of the above embodiments can be implemented by a program instructing a processor. The program can be stored in a computer-readable storage medium, which is a non-transitory medium, such as random access memory, read-only memory, flash memory, hard disk, solid-state drive, magnetic tape, floppy disk, optical disk, and any combination thereof. The storage medium can be any available medium accessible to a computer or a data storage device such as a server or data center that integrates one or more available media. This available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., digital video disc (DVD)), or a semiconductor medium (e.g., solid-state drive (SSD)).

[0095] The descriptions of the processes or structures corresponding to the above figures each have their own emphasis. For parts of a process or structure that are not described in detail, please refer to the relevant descriptions of other processes or structures.

[0096] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.

Claims

1. A wireless communication method based on a wireless sensor network, wherein the wireless sensor network includes a sink node and multiple sensor nodes, the sensor nodes being used to collect monitoring data, and both the sink node and the sensor nodes are equipped with radio frequency modules for transmitting and receiving wireless signals, the wireless communication method being applied to one side of the sensor nodes, characterized in that, Initially, the radio frequency modules of both the aggregation node and the sensor node are in a wireless receiving state; the wireless communication method includes: Receive instructions to upload monitoring data; Transitioning from wireless receiving state to wireless transmitting state; A first broadcast packet is sent to the aggregation node. The first broadcast packet includes a wireless sensor network identifier, an aggregation node identifier, a sensor node identifier of the local node, and an upload beacon identifier. The upload beacon identifier is used to prompt the aggregation node to send a first connection request packet to the sensor node. Transitioning from wireless transmit state to wireless receive state; Receive the first connection request packet; Establish a wireless connection with the aggregation node and upload monitoring data.

2. The wireless communication method based on a wireless sensor network according to claim 1, characterized in that, The triggering conditions for the upload monitoring data command include: The remaining storage space of the sensor node is less than a preset threshold; and / or The monitoring data collected by the sensor node falls within a preset range; and / or The sensor node's self-test result indicates a device malfunction.

3. The wireless communication method based on a wireless sensor network according to claim 1, characterized in that, The wireless sensor network is a star network, and the number of sensor nodes in the same wireless sensor network is greater than 200.

4. The wireless communication method based on a wireless sensor network according to claim 1, characterized in that, The communication protocol between the aggregation node and the sensor node is the Bluetooth protocol.

5. The wireless communication method based on a wireless sensor network according to claim 4, characterized in that, The first broadcast packet is a connectable non-directional broadcast packet.

6. The wireless communication method based on a wireless sensor network according to claim 1, characterized in that, The wireless communication method further includes: Receive commands to join a wireless sensor network; Transitioning from wireless receiving state to wireless transmitting state; A second broadcast packet is sent to the aggregation node. The first broadcast packet includes the sensor node identification code of this node and the beacon joining identification code; the beacon joining identification code is used to prompt the aggregation node to send a second connection request packet to the sensor node. Transitioning from wireless transmit state to wireless receive state; Receive the second connection request packet; Establish a wireless connection with the aggregation node and obtain the wireless sensor network identification code and the aggregation node identification code.

7. A wireless communication method based on a wireless sensor network, wherein the wireless sensor network includes a sink node and multiple sensor nodes, the sensor nodes are used to collect monitoring data, and both the sink node and the sensor nodes are equipped with radio frequency modules for transmitting and receiving wireless signals, the wireless communication method being applied to the sink node side, characterized in that, Initially, the radio frequency modules of both the aggregation node and the sensor node are in a wireless receiving state; the wireless communication method includes: Receive a command to read monitoring data, wherein the command includes a target sensor node identification code; Transitioning from wireless receiving state to wireless transmitting state; A third broadcast packet is sent to the sensor node, the third broadcast packet including a wireless sensor network identifier, a target sensor node identifier, and a read beacon identifier; the read beacon identifier is used to prompt the sensor node to send a third connection request packet to the aggregation node; Transitioning from wireless transmit state to wireless receive state; Receive the third connection request packet; Establish a wireless connection with the sensor node and read the monitoring data.

8. A method for monitoring battery power in an electric vehicle, the electric vehicle comprising a control module and multiple battery modules, each battery module being equipped with a sensor node for collecting battery power, both the sensor node and the control module being equipped with a radio frequency module for transmitting and receiving wireless signals, the sensor node and the control module forming a wireless sensor network with the control module as the aggregation node, characterized in that... In the initial state, the radio frequency modules of both the aggregation node and the sensor node are in wireless receiving mode; The battery power monitoring method includes: Sensor nodes receive commands to upload monitoring data; The sensor node switches from wireless receiving mode to wireless transmitting mode; The sensor node sends a first broadcast packet to the aggregation node. The first broadcast packet includes a wireless sensor network identifier, an aggregation node identifier, a sensor node identifier of the local node, and an upload beacon identifier. The aggregation node sends a first connection request packet to the sensor node based on the uploaded beacon identification code; The sensor node transitions from wireless transmitting state to wireless receiving state; The sensor node receives the first connection request packet; The sensor node establishes a wireless connection with the aggregation node and uploads monitoring data.

9. An electronic device comprising a memory and a processor, characterized in that, The processor is used to execute the computer program stored in the memory to cause the electronic device to perform the wireless communication method based on a wireless sensor network as described in any one of claims 1 to 6.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the wireless communication method based on a wireless sensor network as described in any one of claims 1 to 6.

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