A distributed wireless sensing and measurement network and method applicable to aircraft

Abstract

The present invention relates to a distributed wireless sensing measurement network and method applicable to an aircraft. The wireless sensing network includes N central nodes, a plurality of sub-nodes, and a plurality of sensing units; the N central nodes are divided into one master node and N-1 backup nodes; a single sub-node is connected to the sensing units adjacent in position, and the sub-nodes relay each other to receive the synchronization data packets of the master node and transmit back the measurement data. By adopting a hierarchical network architecture with redundant central nodes and a forwarding strategy of time-sharing relaying, the real-time and reliable transmission of wireless sensing data is realized. Compared with the single-point transmission mode under the star network architecture, a backup channel for two-way data transmission is constructed on the basis of meeting strict time synchronization. Based on the concept of hierarchical sleep, a low-power sensing mechanism with three-stage sleep switching and fast wake-up is designed. Compared with the existing single sleep mode design, on the premise of ensuring the integrity of the transmitted data, precise control of the wireless sensing power consumption is realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of wireless sensing, and relates to a distributed wireless sensing measurement network and method applicable to an aircraft. Background Art

[0002] Facing the increasing demand for data acquisition in the field of aircraft, the wireless sensing technology that avoids complex cable layouts has emerged. By establishing a wireless sensing network, the data of distributed nodes is aggregated. However, this also poses higher requirements for the real-time performance and reliability of data transmission. At the same time, the sensing network must minimize the energy consumption of nodes as much as possible.

[0003] The existing wireless sensing network for aircraft mainly adopts a star network architecture with a single central node. Each sub-node communicates with the central node separately according to the time division multiplexing protocol. The failure of any link will cause data loss, and the network robustness is poor. In terms of power consumption control, existing wireless sensing nodes can directly switch between the working mode and the sleep mode, but it is easy to cause mis-triggering of the sleep mode and difficult to wake up in real time. Summary of the Invention

[0004] The technical problem solved by the present invention is: overcoming the deficiencies of the prior art, and proposing a distributed wireless sensing measurement network and method applicable to an aircraft, solving the problem of poor network robustness, and reducing the node power consumption on the premise of ensuring rapid wake-up of nodes and avoiding mis-sleep.

[0005] The technical solution adopted by the present invention is: a distributed wireless sensing measurement network applicable to an aircraft, including N central nodes, M sub-nodes, and L sensing units, where N≥1, M≥1, and L≥1;

[0006] Among the N central nodes, one central node is the master node, and the other central nodes are backup nodes; the master node manages all sub-nodes, and one sub-node is connected to S sensing units adjacent in position; the sensing units that collect the same type of physical quantity and the sub-nodes connected thereto jointly belong to the same underlying network, where S≥1;

[0007] After receiving the data acquisition instruction, the master node sends a synchronization data packet to the sub-nodes according to the wireless synchronization period T; receives the valid acquisition data of each sub-node within the current T period, and packs and outputs the first packet of valid acquisition data received from each sub-node within the current T period;

[0008] A child node, in the real-time working mode, receives synchronization data packets for time synchronization and forwards the synchronization data packets to other child nodes in the same underlying network; shares the sensing data collected by the sensing unit connected to this child node with other child nodes in the same underlying network, and forwards the received sensing data shared by other child nodes and the sensing data collected by the sensing unit connected to this child node to the master node;

[0009] A sensing unit, which collects and sends sensing data to the child node.

[0010] Furthermore, time-division multiplexing is adopted for communication between the master node and the child nodes.

[0011] Furthermore, the format of the synchronization data packet includes a packet counter, which starts counting from when the first synchronization data packet is sent and increases sequentially according to the wireless synchronization period. The child node corrects the local time count according to the count value of the packet counter to achieve time synchronization.

[0012] Furthermore, the format of the synchronization data packet also includes: a synchronization identification header, a data source segment, and a synchronization identification footer; among them, the data source segment represents the sending node of the synchronization data packet, which is defaulted to the master node; the synchronization identification header and the synchronization identification footer are identification fields known to the child nodes for identifying the synchronization data packet.

[0013] Furthermore, the master node performs real-time fault detection. When the master node fails but can still send synchronization data packets, the master node sends the synchronization data packets to the backup node. After receiving the synchronization data packets, the backup node feeds back a signal indicating that the synchronization data packets have been received, and assigns the count value of the packet counter to the local counter of the backup node to complete time synchronization. The backup node closest to the master node switches to the master node, and the master node automatically shuts down after receiving the signal indicating that the synchronization data packets have been received.

[0014] Furthermore, the master node performs real-time fault detection. When the master node fails and cannot send synchronization data packets, after the backup node does not detect the synchronization data packets of the master node in multiple wireless synchronization periods T, the backup node closest to the master node takes over the control right of the measurement network and feeds back a signal indicating that the switch has been made to the master node, and the master node automatically shuts down after receiving the signal indicating that the switch has been made.

[0015] Furthermore, the child nodes forward the synchronization data packets in a time-sharing relay manner;

[0016] Among them, for the format of the forwarded synchronization data packet, the packet counter does not increase, and the data source segment is replaced by the child node that performs relay forwarding.

[0017] Furthermore, the child node also has a sleep mode, where the sleep mode is divided into a pre-sleep mode, an intermittent sleep mode, and a deep sleep mode;

[0018] In the pre-sleep mode, the child node still retains the wireless transmission functions of time-sharing relay forwarding and data acquisition, and monitors in real time whether a synchronization data packet is received; in the intermittent sleep mode, the wireless transmission of data acquisition is stopped; in the deep sleep mode, only the device operation requirements with the lowest power consumption are maintained.

[0019] Furthermore, the switching process between the various modes of the child node specifically includes:

[0020] At the beginning of the establishment of the distributed measurement network, the child node is in the deep sleep mode and listens for synchronization data packets at the longest period of once every X1 seconds; the listening time for once every X1 seconds is set as a wake-up monitoring section of 1.5T, and the wake-up detection section is the time period for listening for synchronization data packets; if the child node listens to two or more synchronization data packets with different packet counters during this period, it switches to the real-time working mode; otherwise, it continues the wake-up monitoring;

[0021] After entering the real-time working mode, if the child node does not detect a synchronization data packet within a wireless synchronization period T, it enters the pre-sleep mode;

[0022] The pre-sleep state of the child node lasts for at most Y wireless synchronization periods T. If no synchronization data packet is received for Y consecutive wireless synchronization periods T, it switches to the intermittent sleep mode; otherwise, the child node resumes the real-time working mode;

[0023] If it enters the intermittent sleep mode, first maintain the wake-up monitoring state for Z wireless synchronization periods T. If no synchronization data packet is received within Z wireless synchronization periods T, then carry out wake-up state monitoring at intervals of X2 seconds; if a synchronization data packet is received within Z wireless synchronization periods T, the child node resumes the real-time working mode; X1>X2>10, Z>Y>1;

[0024] If no synchronization data packet is still recognized after the intermittent sleep mode lasts for Q minutes, the child node switches to the deep sleep mode, and the synchronization data packet detection interval is increased to X1 seconds; Q>1.

[0025] Furthermore, a wireless sensing method applicable to an aircraft is provided, including the following process:

[0026] The master node receives a collection instruction and sends a synchronization data packet within a wireless synchronization period T;

[0027] The child node receives the synchronization data packet and relays and sends the synchronization data packet in a preset order;

[0028] After the child node receives the synchronization data packet, it collects the sensing data of the sensing unit. If the packet counters of two adjacent synchronization data packets received by the child node in the current period are the same, the collection is not repeated;

[0029] The child nodes transmit the collected data back and receive the collected data of other child nodes; if a child node receives the collected data of other child nodes within the same underlying network, it will perform relay forwarding.

[0030] Before the next wireless synchronization period T, the master node receives the valid collected data of each child node within the current T period, and packs and outputs the first packet of valid collected data received from each child node within the current T period.

[0031] The beneficial effects of the present invention compared with the prior art are as follows:

[0032] (1) At the network structure level, the redundant center switching strategy of the present invention can not only maintain the effective control of the wireless sensor network, but also avoid the uncertainty brought by the control right competition. The hierarchical network structure is easy to expand the node scale; compared with the single-point transmission mode under the star network architecture, on the basis of meeting strict time synchronization, a backup channel for two-way data transmission is constructed.

[0033] (2) Facing the complex electromagnetic environment inside the aircraft, the wireless sensor network of the present invention realizes strict time synchronization based on the time-sharing relay strategy, and through the relay forwarding of the child nodes within the underlying network, further improves the real-time performance and reachability of the collected data of the sensing unit.

[0034] (3) In response to the low-power design requirements, the present invention proposes a three-level sleep and fast wake-up mechanism, which realizes precise control of the node power consumption on the premise of ensuring the quick wake-up of the node and avoiding mis-sleep. Description of the Drawings

[0035] Figure 1 Schematic diagram of the composition of the wireless sensor network according to the embodiment of the present invention;

[0036] Figure 2 Redundant working logic flow chart according to the embodiment of the present invention;

[0037] Figure 3 Schematic diagram of time-sharing relay of synchronous data packets according to the embodiment of the present invention;

[0038] Figure 4 Schematic diagram of relay forwarding of collected data according to the embodiment of the present invention;

[0039] Figure 5 Hierarchical sleep process of child nodes according to the embodiment of the present invention;

[0040] Figure 6 Method flow chart of the operation of the wireless sensor network according to the embodiment of the present invention. Detailed Embodiments

[0041] The present invention will be further described below in conjunction with the drawings.

[0042] The distributed measurement network structure designed in the embodiments of the present invention is as follows Figure 1 shown. In this embodiment, the wireless sensor network adopts a hierarchical network architecture with redundant centers. In the top-level network of the star structure, two central nodes jointly serve as the core of the entire sensor network, responsible for networking and information aggregation of the entire measurement network, and finally outputting to external devices. The sensor units that collect the same type of physical quantity and their connected sub-nodes jointly belong to the same bottom-level network. The entire measurement network can include multiple bottom-level networks. Within the same bottom-level network, the sub-nodes relay each other to receive the synchronization data packets of the central node and return the collected sensor data.

[0043] Specifically, for two functionally independent central nodes, only one central node is in the working state at the same time.

[0044] Preferably, one of the central nodes is defaulted to be the primary node, and the other central node is used as the backup node; when the primary node fails, the backup node listens to the synchronization data packets of the primary node through a wireless link or a wired link of an external device, and according to the dual-redundancy judgment process, the backup node switches to the new primary node.

[0045] Both central nodes are connected to external devices through wired links and communicate with the sub-nodes of multiple bottom-level networks through wireless links. After receiving a data acquisition instruction from an external device, the primary node sends synchronization data packets to the sub-nodes according to a wireless synchronization period T (T is in milliseconds) for the sub-nodes to perform time synchronization and collect data for backhaul. The primary node receives the valid acquisition data of each sub-node within the current T period, packs it and uploads it to the external device.

[0046] The sub-nodes in the same bottom-level network communicate with each other through wireless links. Each sub-node receives the synchronization data packet and corrects its local time according to the time in the synchronization data packet to complete synchronization; each sub-node is connected to adjacent sensor units in a wired manner. On the basis of time synchronization, each wireless sub-node forwards the synchronization data packet in a time-division relay manner, that is, each wireless sub-node occupies the radio frequency channel in a time-division manner according to a certain time sequence, and only one sub-node forwards the synchronization data packet to other sub-nodes within each period T.

[0047] The acquisition data sent by the sub-nodes is directly sent to the primary node and is also received by other sub-nodes in the same bottom-level network and forwarded to the primary node after a delay.

[0048] The sensor unit is used to collect and send sensor data to the sub-node connected thereto.

[0049] To ensure the stability of data in distributed measurement and avoid the uncertainties brought by network control right competition, two functionally independent central nodes adopt a primary-backup redundancy design, and only the primary node is in the working mode at the same moment. The takeover of the wireless measurement network control right adopts a dual-redundancy judgment process, as Figure 2 shown.

[0050] Suppose the current primary node is central node 1. Central node 1 conducts real-time fault detection. When central node 1 fails but can still send synchronization data packets through the external wired link, central node 1 sends synchronization data packets to central node 2 through the external wired link. After receiving the synchronization data packets, central node 2 feeds back a signal indicating that the synchronization data packets have been received, and synchronizes the time of central node 2 according to the packet counter in the synchronization data packets. The specific method is as follows: Central node 2 has a local counter, which increments according to the wireless synchronization period. When receiving the synchronization data packets sent by central node 1, it assigns the count value of the packet counter therein to the local counter to complete time synchronization. Central node 2 then switches to the primary node, and central node 1 automatically shuts down after receiving the signal that the synchronization data packets have been received.

[0051] If central node 1 fails and cannot send synchronization data packets through the external wired link, central node 2 monitors the external device information. If the synchronization data packets of central node 1 are not detected for multiple cycles and a collection instruction is received, it immediately takes over the control right of the wireless measurement network and feeds back a switched signal to central node 1. Central node 1 automatically shuts down after receiving the switched signal.

[0052] Based on the generalized data measurement requirements, the number of sub-nodes in the distributed measurement network can be expanded, and a single sub-node can also support the data acquisition and editing of multiple types of sensing units, realizing the goal of flexible configuration for different tasks and different ranges of the aircraft under a unified system architecture.

[0053] In the distributed measurement network, each wireless node communicates through a time-division multiplexing method with strict time synchronization. Its time synchronization adopts the heartbeat pulse method, that is, the primary node periodically sends synchronization data packets outward at a period T. The sub-nodes receive the synchronization data packets and adjust their local counters according to the count value of the packet counter in the synchronization data packets to achieve time synchronization. On the basis of time synchronization, each wireless sub-node occupies the radio frequency channel in a certain time sequence in a time-division manner, and finally realizes time-division multiplexing.

[0054] The format of the synchronization data packets of the central node is shown in Table 1:

[0055] Table 1 Synchronization Data Packet Format

[0056]

[0057]

[0058] In Table 1, the packet counter of the master node starts counting from the time when the first synchronization data packet is sent and increases sequentially according to the wireless synchronization period. The slave nodes can correct the local time count based on the packet counter. The specific correction method is as follows: The slave nodes themselves also have local counters and increase them according to the wireless synchronization period. When a synchronization data packet is received, if the count value of the packet counter in it is different from the local counter, the count value of the packet counter is assigned to the local counter to complete time synchronization. The data source segment represents the sending node of the synchronization data packet, which is defaulted to the master node. The synchronization identification header and the synchronization identification tail are identification fields known to the slave nodes to identify the synchronization data packet.

[0059] To ensure the reachability of the synchronization data packet of the central node, the slave nodes in the distributed measurement network forward the synchronization data packet in a time-division relay manner. According to the established order, the slave nodes forward the synchronization data packet signal in turn. This process repeats, but within one wireless synchronization period, only one slave node in the same underlying network relays the synchronization data packet. The specific implementation method is as follows: Assume that the slave nodes in this underlying network are numbered from 1 to M. Divide the current count value of the packet counter in the synchronization data packet by the total number of slave nodes M to get the remainder m. The slave node with the node number the same as this remainder turns on the relay in the current wireless synchronization period. The time-division relay process is as Figure 3 shown.

[0060] In the format of the forwarded synchronization data packet, the packet counter does not increase, but the data source segment will be replaced by the slave node that performs the relay forwarding. Therefore, within one wireless synchronization period, a slave node can receive the synchronization data packet at most twice. Judge whether the packet counters of two adjacent wireless synchronization packets are consistent. If they are consistent, turn on the data acquisition of the sensing unit.

[0061] Due to the existence of the time-division relay function of the slave nodes, the unidirectional instability of the synchronization data packet between the master node and any slave node will not cause the slave node to lose synchronization or enter the sleep mode by mistake. Using this method to relay the wireless synchronization data packet sent by the master node not only ensures the real-time data synchronization in a multi-blocked and enclosed space, but also reduces the radio frequency transmission power consumption compared with the full-node relay mode, and at the same time takes into account the synchronization reliability and low-power requirements of the distributed measurement network.

[0062] In addition to the forward synchronization data packet relay, between the slave nodes in the same underlying network, the wireless acquisition data will also be relayed in a time-division manner. The data flow is as Figure 4 shown. Taking the underlying network composed of two slave nodes as an example, within one wireless synchronization period, the wireless data sent by slave node 1_1 is not only directly sent to the central node, but also received and relayed with delay by slave node 1_2, and the same is true for slave node 1_2. Using the method that the paired nodes relay each other provides a redundant transmission path for the sending of the node wireless data.

[0063] For the master node, at the beginning of each wireless synchronization period, it broadcasts and sends synchronization data packets, and turns on the listening mode at other times to listen for the feedback data from the slave nodes. When the master node receives the valid acquisition data of each slave node within the current T period, it packs and outputs the data. Among them, if multiple packets of valid acquisition data from the same slave node are received within the current T period, only the first packet of data is packed and output to the external device.

[0064] In the aircraft distributed measurement network, the wired connection between the central node and the external device solves the power supply requirement, and each slave node uses its own battery for power supply, so the power consumption must be reduced as much as possible.

[0065] The slave node has a real-time working mode and a sleep mode. In the real-time working mode, a single slave node is responsible for receiving synchronization data packets and sending acquisition data, and the power is in the milliwatt level. When the slave node is only in the sleep state of listening for synchronization data packets, the power consumption can be reduced to the micro-watt level. Therefore, according to the actual working requirements of the aircraft, setting multiple levels of sleep states for the slave node in the non-acquisition state and ensuring the accurate switching between the sleep and working modes become the key to the low-power transmission technology of the distributed measurement network.

[0066] The sleep mode of the wireless sensor network in the present invention is divided into three levels, namely the pre-sleep mode, the intermittent sleep mode, and the deep sleep mode, and different synchronization data packet listening strategies and acquisition data transmission modes are adopted. The hierarchical sleep working process is as Figure 5 shown.

[0067] At the beginning of the establishment of the distributed measurement network, the wireless sensor network slave node is in the deep sleep mode and listens for synchronization data packets at the longest period of once every 70 s; in the wake-up process of the slave node, the listening time for once every 70 s is set as the wake-up monitoring section of 1.5 times the wireless synchronization period, and the wake-up detection section is the time period for listening for synchronization data packets; if the slave node listens to two or more synchronization data packets with different packet counters during this period, it means that the master node is working stably and switches to the real-time working mode; otherwise, continue to perform wake-up listening.

[0068] After entering the real-time working mode, if the working slave node does not detect a synchronization data packet within a wireless synchronization period T, it enters the pre-sleep mode. In the pre-sleep mode, the slave node still retains the functions of time-division relay forwarding and wireless transmission of acquisition data, and continuously monitors whether it receives a synchronization data packet. The setting of the pre-sleep mode can avoid mis-sleep actions caused by pulse interference resulting in the invalidation of a certain synchronization data packet, and has no impact on the real-time performance of the distributed measurement network.

[0069] The pre-dormant state of the child node lasts for a maximum of 5 wireless synchronization cycles. If no synchronization data packet is received within 5 consecutive wireless synchronization cycles, it switches to the intermittent sleep mode; otherwise, the child node resumes the real-time working mode. After entering the intermittent sleep mode, it first maintains the wake-up monitoring state for 20 wireless synchronization cycles. If no synchronization data packet is received within 20 wireless synchronization cycles, it then conducts wake-up state monitoring at intervals of 10 s; if a synchronization data packet is received within 20 wireless synchronization cycles, the child node resumes the real-time working mode. Different from the pre-dormant mode, the intermittent sleep mode no longer performs wireless transmission of the collected data.

[0070] After the intermittent sleep mode that lasts for a maximum of 5 min ends, if no synchronization data packet is still recognized, the child node switches to the deep sleep mode, and the synchronization detection interval is increased to 70 s to maintain the device operation requirement with the lowest power consumption.

[0071] Figure 6 The method flowchart for using the wireless sensor network described in the present invention includes the following processes:

[0072] The master node receives the acquisition instruction from the external device, and within one cycle T, it sends a synchronization data packet and listens for the data returned by the child nodes in real time;

[0073] The child node receives the synchronization data packet and relays the synchronization data packet in the preset order;

[0074] After receiving the synchronization data packet, the child node enables the data acquisition of the sensing unit. If the packet counters of two adjacent synchronization data packets received by the child node within the current cycle are the same, the acquisition is not repeated;

[0075] The child node returns the acquired data and receives the acquired data of other child nodes; if the child node receives the acquired data of other child nodes within the same underlying network, it performs relay forwarding;

[0076] Before the next wireless synchronization cycle T, the master node receives the valid acquired data of each child node within the current T cycle and packs and outputs it. If multiple packets of valid acquired data from the same child node are received within the current T cycle, only the first packet of data is packed and output.

[0077] Although the present invention has been publicly disclosed above with preferred embodiments, it is not used to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention all fall within the protection scope of the technical solution of the present invention.

Claims

1. A distributed wireless sensing and measurement network applicable to an aircraft, characterized in that It includes N central nodes, M sub-nodes, and L sensing units, where N≥1, M≥1, and L≥1; There are N central nodes, one of which is the master node and the others are backup nodes; the master node manages all sub-nodes, and one sub-node is connected to S sensing units adjacent in position; the sensing units that collect the same type of physical quantity and the sub-nodes they are connected to belong to the same underlying network, where S≥1; The master node, after receiving a data collection instruction, sends a synchronization data packet to the sub-nodes according to the wireless synchronization period T; receives the valid collection data of each sub-node within the current T period, and packs and outputs the first packet of valid collection data received from each sub-node within the current T period; The sub-node, in the real-time working mode, receives the synchronization data packet for time synchronization and forwards the synchronization data packet to other sub-nodes in the same underlying network; Shares the sensing data collected by the sensing units connected to this sub-node with other sub-nodes in the same underlying network, and forwards the sensing data shared by other sub-nodes received and the sensing data collected by the sensing units connected to this sub-node to the master node; The sub-node also has a sleep mode, where the sleep mode is divided into a pre-sleep mode, an intermittent sleep mode, and a deep sleep mode; In the pre-sleep mode, the sub-node still retains the forwarding and wireless sending functions of time-division relaying and collecting data, and continuously monitors whether a synchronization data packet is received; in the intermittent sleep mode, the wireless sending of data collection is stopped; in the deep sleep mode, only the device operation requirements with the lowest power consumption are maintained; The sensing unit collects and sends sensing data to the sub-node.

2. The distributed wireless sensing and measurement network applicable to an aircraft according to claim 1, wherein, Time-division multiplexing is used for communication between the master node and the sub-node.

3. The distributed wireless sensing and measurement network applicable to an aircraft according to claim 2, characterized in that, The format of the synchronization data packet includes a packet counter, which starts counting from the first synchronization data packet sent and increases sequentially according to the wireless synchronization period. The sub-node corrects the local time count according to the count value of the packet counter to achieve time synchronization.

4. A distributed wireless sensing and measurement network applicable to an aircraft according to claim 3, characterized in that The format of the synchronization data packet also includes: a synchronization identification header, a data source segment, and a synchronization identification footer; among them, the data source segment represents the sending node of the synchronization data packet, which is defaulted to the master node; the synchronization identification header and the synchronization identification footer are identification fields known to the sub-node for identifying the synchronization data packet.

5. The distributed wireless sensing and measurement network applicable to an aircraft according to claim 3, characterized in that The master node performs real-time fault detection. When the master node fails but can still send a synchronization data packet, the master node sends the synchronization data packet to the backup node. After receiving the synchronization data packet, the backup node feeds back a synchronization data packet received signal to the master node, and assigns the count value of the packet counter to the local counter of the backup node to complete time synchronization. The backup node closest in distance switches to the master node, and the master node automatically shuts down after receiving the synchronization data packet received signal.

6. The distributed wireless sensing and measurement network applicable to an aircraft according to claim 5, characterized in that The master node performs real-time fault detection. When the master node fails and cannot send a synchronization data packet, after the backup node does not detect the synchronization data packet of the master node in multiple wireless synchronization periods T, the backup node closest in distance takes over the control of the measurement network and feeds back a switched signal to the master node. The master node automatically shuts down after receiving the switched signal.

7. A distributed wireless sensing and measurement network applicable to an aircraft according to claim 3, characterized in that, The sub-nodes forward the synchronization data packet in a time-division relaying manner; Among them, for the format of the forwarded synchronization data packet, the packet counter does not increase, and the data source segment is replaced by the child node performing relay forwarding.

8. A distributed wireless sensing and measurement network applicable to an aircraft according to claim 7, characterized in that, The switching process between different modes of the child node specifically includes: At the beginning of the establishment of the distributed measurement network, the child node is in the deep sleep mode and listens for synchronization data packets at the longest period of once every X1 seconds; the wake-up monitoring segment with a time of 1.5T is set for each listening of once every X1 seconds, and the wake-up monitoring segment is the time period for listening for synchronization data packets; if the child node listens to two or more synchronization data packets with different packet counters during this time period, it switches to the real-time working mode; otherwise, it continues to perform wake-up monitoring; After entering the real-time working mode, if the child node does not detect a synchronization data packet within a wireless synchronization period T, it enters the pre-sleep mode; The pre-sleep state of the child node lasts for at most Y wireless synchronization periods T. If no synchronization data packet is received for Y consecutive wireless synchronization periods T, it switches to the intermittent sleep mode; otherwise, the child node resumes the real-time working mode; If it enters the intermittent sleep mode, first maintain the wake-up monitoring state for Z wireless synchronization periods T. If no synchronization data packet is received within Z wireless synchronization periods T, then perform wake-up state monitoring at an interval of X2 seconds; if a synchronization data packet is received within Z wireless synchronization periods T, the child node resumes the real-time working mode; X1 > X2 > 10, Z > Y > 1; If no synchronization data packet is recognized after the intermittent sleep mode lasts for Qmin, the child node switches to the deep sleep mode, and the synchronization data packet detection interval is increased to X1 seconds; Q > 1.

9. A wireless sensing method for a distributed wireless sensing measurement network applicable to an aircraft according to claim 8, characterized in that, It includes the following processes: The master node receives the acquisition instruction and sends a synchronization data packet within a wireless synchronization period T; The child node receives the synchronization data packet and relays and sends the synchronization data packet in a preset order; After the child node receives the synchronization data packet, it acquires the sensing data of the sensing unit. If the packet counters of two adjacent synchronization data packets received by the child node in the current period are the same, the acquisition is not repeated; The child node transmits the acquired data back and receives the acquired data of other child nodes; If the child node receives the acquired data of other child nodes in the same underlying network, it performs relay forwarding; Before the next wireless synchronization period T, the master node receives the valid acquired data of each child node in the current T period and packs and outputs the first packet of valid acquired data received from each child node in the current T period.

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