Data acquisition system and data acquisition method

Abstract

The invention provides a data acquisition system and a data acquisition method, and relates to the technical field of satellite communication, the data acquisition system comprises a data processing platform, a satellite communication network, a ground station and a plurality of acquisition devices; the plurality of acquisition devices establish a local area network through communication channels among the devices, and the plurality of acquisition devices directly perform acquisition data interaction and collaboration based on the local area network; the satellite communication network is used for sending acquired data cooperatively transmitted among the plurality of acquisition devices to the ground station; and the ground station is used for forwarding the acquired data to the data processing platform, and through local networking of the acquisition equipment, the sending efficiency of the data in a local system is improved, the overall power consumption of the system is reduced, and the problem of accidental intermittence is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of satellite communication, and particularly to a data acquisition system and a data acquisition method. Background Art

[0002] The channels of satellite communication terminals or modules in the satellite Internet of Things are single-channel (time-division transceiver) or dual-channel (one receive and one transmit, simultaneous receive and transmit). Single-channel or dual-channel devices can only communicate with satellites, and devices cannot communicate with each other. Since the data of a single device can only be stored inside the device itself, when a large amount of data is collected or the device is in an environment such as electromagnetic interference, problems such as the inability to send the collected data in time and the full storage space of the device will occur. Moreover, the earlier the device finishes sending the data, the earlier it can enter the sleep state, thereby reducing power consumption. If the device collects a large amount of data, the transmission time will also be extended and the power consumption will increase. Summary of the Invention

[0003] The present invention provides a data acquisition system and a data acquisition method to solve the problems that in the traditional satellite data acquisition system, devices cannot communicate with each other, each device can only communicate with satellites separately, which may lead to the problems of inability to send data in time or full storage space of the device, and the increase in device power consumption when a large amount of data is collected.

[0004] The present invention provides a data acquisition system, including: A data processing platform, a satellite communication network, a ground station, and a plurality of acquisition devices; The plurality of acquisition devices form a local area network through an inter-device communication channel, and the plurality of acquisition devices directly perform acquisition data interaction and cooperation based on the local area network; The satellite communication network is used to send the acquisition data cooperatively transmitted between the plurality of acquisition devices to the ground station; The ground station is used to forward the acquisition data to the data processing platform.

[0005] According to the data acquisition system provided by the present invention, after the plurality of acquisition devices form a local area network through an inter-device communication channel, it further includes: Each acquisition device maintains a system device information table internally, and the system device information table is used to record the status of each acquisition device and the channel occupancy situation; When the device status and / or channel occupancy situation of each acquisition device changes, it updates its own system device information table and triggers a system broadcast to be sent to other acquisition devices in the system; The plurality of acquisition devices perform acquisition data cooperation based on the updated system device information table.

[0006] The data acquisition system provided by the present invention further includes: When a newly added acquisition device accesses the network in the system, the newly added acquisition device synchronizes the system device information table through system broadcasting to join the local area network.

[0007] In the data acquisition system provided by the present invention, the acquisition device includes a priority management module, and the priority management module is used to dynamically adjust the priority of acquisition data transmission according to the urgency of the acquisition data in each acquisition device.

[0008] In the data acquisition system provided by the present invention, the acquisition device includes a load balancing module, and the load balancing module is used to forward the acquisition data of each acquisition device itself to the low-load acquisition device in the local area network according to the storage pressure of the acquisition device, the communication interference situation, and the priority of acquisition data transmission output by the priority management module.

[0009] In the data acquisition system provided by the present invention, the communication channels between the multiple acquisition devices include: a multicast channel and a unicast channel, where: The multicast channel is used to broadcast system status information or network control instructions; The unicast channel is used for one-to-one data transmission between devices.

[0010] In the data acquisition system provided by the present invention, when the current acquisition device communicates with other acquisition devices using the multicast channel, the current acquisition device is used as a temporary central node device, and the temporary central node device receives the response information of other acquisition devices in the system through the unicast channel. When receiving the response information of multiple acquisition devices, a time-sharing reception mechanism is adopted, and the time-sharing reception mechanism includes: After the temporary central node device sends broadcast information, a timer is started, and a period of time after starting the timer is divided into multiple time slots, and each acquisition device feeds back response data within the time slot corresponding to its own response sequence number; Among them, the response sequence number is allocated according to the network access order of each acquisition device, and response sequence numbers are reserved for newly networked devices.

[0011] The present invention also provides a data acquisition method, which is applicable to the data acquisition system described in any one of the above, and includes: A local area network is formed through the communication channels between devices, so that multiple acquisition devices can directly perform acquisition data interaction and cooperation based on the local area network; The acquisition data cooperatively transmitted between the multiple acquisition devices is sent to the ground station, so that the ground station is used to forward the acquisition data to the data processing platform.

[0012] According to the data acquisition method provided by the present invention, it further includes: Dynamically adjust the priority of the collected data transmission according to the urgency of the collected data in each collection device.

[0013] According to the data collection method provided by the present invention, it further includes: Forward the collected data of each collection device to the low-load collection device within the local area network according to the storage pressure of the collection device, the communication interference situation, and the priority of the data transmission.

[0014] The data collection system and data collection method provided by the present invention, the data collection system includes a data processing platform, a satellite communication network, a ground station, and a plurality of collection devices; the plurality of collection devices form a local area network through an inter-device communication channel, and the plurality of collection devices directly perform collected data interaction and collaboration based on the local area network; the satellite communication network is used to send the collected data collaboratively transmitted between the plurality of collection devices to the ground station; the ground station is used to forward the collected data to the data processing platform, and through the local area networking of the collection devices, improve the data sending efficiency within the local area system, reduce the overall power consumption of the system, and solve the occasional intermittent problem. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0016] Figure 1 It is a schematic functional structure diagram of the data collection system provided by the embodiment of the present invention; Figure 2 It is a schematic mesh structure diagram of the collection device networking provided by the embodiment of the present invention; Figure 3 It is a flowchart of the data collection method provided by the embodiment of the present invention. Detailed Embodiments

[0017] To make the objectives, technical solutions, and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions in the present invention in conjunction with the drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0018] Figure 1 It is a functional structure diagram of the data collection system provided by the embodiment of the present invention, asFigure 1 As shown in the figure, the data acquisition system provided by the embodiment of the present invention includes: A data processing platform, a satellite communication network, a ground station, and multiple acquisition devices; The multiple acquisition devices form a local area network through an inter-device communication channel, and the multiple acquisition devices directly perform acquisition data interaction and collaboration based on the local area network; The satellite communication network is used to send the acquisition data collaboratively transmitted between the multiple acquisition devices to the ground station; The ground station is used to forward the acquisition data to the data processing platform.

[0019] In the embodiment of the present invention, the data processing platform is used to finally receive and process the data sent by the satellite communication acquisition device. The acquisition device is used to acquire the sensor data or other input data accessed in the system. The acquisition device forms a local area network through inter-device communication to form a network of the local system as Figure 2 shown in the figure, and efficiently sends the data of the system to the satellite. In the embodiment of the present invention, the acquisition device autonomously forms a local area network through a non-star-pointing channel to form a mesh topology structure, supporting direct communication and data sharing between devices, breaking through the bottleneck that traditional satellite terminals cannot form a local area network. The device uses a separated design of a star-pointing channel (satellite communication) and a non-star-pointing channel (inter-device communication). The non-star-pointing channel is further divided into a multicast channel and a unicast channel to reduce channel conflicts. The device completes data transmission quickly, reduces the high-power consumption running time, enters the sleep mode as early as possible, and reduces the overall energy consumption.

[0020] In the traditional satellite data acquisition system, the channels of satellite communication terminals or acquisition devices are single-channel or dual-channel. Single-channel or dual-channel devices can only communicate with satellites, and devices cannot communicate with each other. Since the data of a single device can only be stored inside the device itself, when there is a large amount of acquired data or the device is in an environment with electromagnetic interference, problems such as the inability to send the acquired data of the device in time and the full storage space of the device will occur. Moreover, the earlier the device finishes sending the data, the earlier it can enter the sleep mode, thereby reducing power consumption. If the device has a large amount of acquired data, the sending time will also be extended, and the power consumption will also increase.

[0021] The data acquisition system provided by the embodiments of the present invention includes a data processing platform, a satellite communication network, a ground station, and multiple acquisition devices; the multiple acquisition devices form a local area network through an inter-device communication channel, and the multiple acquisition devices directly perform acquisition data interaction and collaboration based on the local area network; the satellite communication network is used to send the acquisition data collaboratively transmitted between the multiple acquisition devices to the ground station; the ground station is used to forward the acquisition data to the data processing platform. By locally networking the acquisition devices, the data sending efficiency within the local area system is improved, the overall power consumption of the system is reduced, and the problem of occasional intermittency is solved.

[0022] Based on any of the above embodiments, after the multiple acquisition devices form a local area network through an inter-device communication channel, it further includes: Each acquisition device maintains a system device information table internally, and the system device information table is used to record the status of each acquisition device and the channel occupancy situation; When the device status and / or the channel occupancy situation of each acquisition device changes, it updates its own system device information table and triggers a system broadcast to be sent to other acquisition devices within the system; The multiple acquisition devices perform acquisition data collaboration based on the updated system device information table.

[0023] In the embodiments of the present invention, after the devices are networked, each device maintains a table representing the system device information of all devices in the current system internally. Under certain conditions, it will trigger the device to send a system broadcast to inform other devices within the system to update the system device information table. The triggering conditions for sending the system broadcast can be that the device occupies a unicast channel, there are certain changes in the data stored inside the device (such as a large amount of change or an increase in high-priority data, etc.) and other conditions.

[0024] In the embodiments of the present invention, the data acquisition system further includes: When a new acquisition device joins the network in the system, the new acquisition device synchronizes the system device information table through a system broadcast to join the local area network.

[0025] In the embodiments of the present invention, new devices dynamically join the network through an active broadcast query and response mechanism, and maintain a unified system device information table, and update the device status in real time. The device status includes but is not limited to device ID, storage capacity, channel occupancy, etc.

[0026] In a traditional data acquisition system, the low bandwidth and high latency characteristics limit the real-time data transmission ability and it is difficult to meet the high-throughput requirements. Satellite signals are vulnerable to path attenuation and external interference, and the communication reliability is unstable. The device in the embodiment of the present invention realizes cross-device data forwarding through a local area network. Emergency data can bypass local electromagnetic interference and be transmitted with the help of low-load nodes, and the success rate of key data is increased by 90%. Based on the load awareness mechanism of the system device information table, data can be automatically distributed to idle devices for storage, avoiding single-point storage overflow, and the storage utilization rate is increased to nearly 100%.

[0027] Based on any of the above embodiments, the acquisition device includes a priority management module, and the priority management module is used to dynamically adjust the priority of the acquisition data transmission according to the urgency of the acquisition data in each acquisition device.

[0028] In the embodiment of the present invention, according to the data source and service requirements, the acquisition data priority is dynamically set to ensure that high-priority data is transmitted first. For example, the priority level of the data collected by an acquisition device such as a sensor can be set. The data collected by the same sensor includes ordinary data and alarm data, and the priority of the alarm data is higher than that of the ordinary data. The data can also be classified into priority levels through other judgment conditions.

[0029] In the embodiment of the present invention, the acquisition device includes a load balancing module, and the load balancing module is used to forward the acquisition data of each acquisition device itself to a low-load acquisition device within the local area network according to the storage pressure of the acquisition device, the communication interference situation, and the priority of the acquisition data transmission output by the priority management module.

[0030] In the embodiment of the present invention, when the data stored inside a certain device is close to the maximum value of the storage quantity or there is a large amount of high-priority data stored inside or the electromagnetic environment where the device is located is very poor for a certain period of time, it will cause data backlog in the device and the sending pressure of the device is relatively large. At this time, in order to give priority to the sending of high-priority data and quickly send the device data, it is necessary to forward the data of the device itself to other devices with low sending pressure in the system for sending. By querying the system device information table maintained inside the device, it is possible to know the sending pressure of each acquisition device in the current system, and then forward the data to a certain device with low sending pressure in the system for storage and sending. Based on the system device information table, the data is forwarded to low-load devices to realize the distributed sharing of storage and transmission pressure.

[0031] In traditional data acquisition systems, device data can only be stored locally, and cannot be distributed and shared or transmitted collaboratively. Emergency data is prone to transmission failure due to environmental interference (such as electromagnetic interference). The storage capacity is limited and non-expandable, and data is prone to loss due to exhaustion of storage space when data accumulates. In the first embodiment of the present invention, the one-to-many broadcast and one-to-one unicast channel separation design, combined with dynamic resource allocation, effectively avoids resource competition among multiple devices, and the local communication efficiency is increased by more than 30%.

[0032] Based on any of the above embodiments, the communication channels between the multiple acquisition devices include: a multicast channel and a unicast channel, where: The multicast channel is used to broadcast system status information or network control instructions; The unicast channel is used for one-to-one data transmission between devices.

[0033] The multicast channel realizes one-to-many communication: the temporary central node broadcasts system messages through the multicast channel, and all devices synchronously update the network status.

[0034] The unicast channel realizes one-to-one communication: the devices negotiate unicast channel resources through the multicast channel and transmit data in parallel, improving the local communication efficiency.

[0035] In traditional data acquisition systems, single-channel or dual-channel devices only support satellite communication and cannot achieve direct communication between devices, resulting in the inability to form a local network, and the system collaboration efficiency is low. When multiple devices work simultaneously, there is a resource competition problem, and the overall communication efficiency is significantly reduced. In the embodiments of the present invention, a mesh self-organizing network is realized through non-star channels (multicast / unicast) between devices, breaking through the traditional isolated communication mode of satellite terminals. Devices can directly share data and channel resources, and the system collaboration efficiency is significantly improved.

[0036] In the embodiments of the present invention, the channels used by the device are divided into satellite-pointing channels and non-satellite-pointing channels. The satellite-pointing channels are the channels for the device to communicate with the satellite. The non-satellite-pointing channels are the channels for devices to communicate with each other, and one multicast channel and multiple unicast channels are set. According to the number of simultaneously communicating devices, the communication in the system is divided into one-to-many communication and one-to-one communication. One-to-many communication uses the multicast channel when a certain device temporarily acts as a central node to send a system broadcast to other devices in the system. One-to-one communication uses the multicast and unicast channels when collecting data is transmitted between two devices. During one-to-many communication, all devices in the system participate; during one-to-one communication, only two devices in the system participate, but multiple one-to-one communications can exist simultaneously, just using different unicast channels. When there is no public broadcast message sent in the system, two devices can communicate. The initiating device first uses the multicast channel to send a communication request message, and the target device receives the message and responds to the initiating device, and at the same time switches to the unicast channel specified in the communication request message. The initiating device uses the multicast channel to inform other devices in the system of the currently used unicast channel, and then the initiating device switches to the unicast channel specified in the communication request message to communicate with the target device.

[0037] In the embodiments of the present invention, when the current acquisition device communicates with other acquisition devices using the multicast channel, the current acquisition device is used as a temporary central node device, and the temporary central node device receives the response information of other acquisition devices in the system through the unicast channel. When receiving the response information of multiple acquisition devices, a time-sharing reception mechanism is adopted. The time-sharing reception mechanism includes: After the temporary central node device sends the broadcast information, a timer is started, and a period of time after starting the timer is divided into multiple time slots, and each acquisition device feeds back response data within the time slot corresponding to its own response sequence number; Among them, the response sequence number is allocated according to the network access order of each acquisition device, and response sequence numbers are reserved for newly networked devices.

[0038] In an embodiment of the present invention, when a new device joins the system network, it actively sends a broadcast message to query whether there is a device in the current system, and the device will perform this operation as soon as it is powered on. The new device temporarily acts as a central node and sends a system broadcast message to query the device status in the current system. After receiving the broadcast message, other devices in the system send system device information such as the device's own ID information, data storage information, and the usage information of the unicast channel in the system to the temporary central node. The new device (temporary central node) receives the response message of other devices in the current system and records these response messages. The new device sends the received response message of other devices and the device information of the new device itself to other devices in the system in a broadcast manner. Other devices receive the broadcast and save the system device information of all devices in the system. Each device in the system maintains a system device information table of all devices in the current local system internally. At this time, the new device has been connected to the network to form a mesh structure system. If the new device has not yet been connected to the network, but receives a system broadcast message to query the device status in the current system, the new device considers itself to be a temporary node, sends a response message of the device's own system device information to the system, and then receives a response from the temporary central node. If the response message contains the system device information of the new device, it is considered that the new device has been connected to the network.

[0039] In the embodiment of the present invention, the temporary central node device is single-channel, and it needs to receive responses from other devices in the receiving system in time-sharing. The networked devices in the system are sorted according to the device numbers to obtain a response sequence number in the system. The response sequence number increases from 2, and sequence number 1 is reserved for new devices that may be added to the network. The devices in the system respond according to their own response sequence numbers. After receiving the system broadcast, the device will start the timer, divide the subsequent period of time into multiple time slots, and the device will send in the time slot of its own response sequence number. Devices that are not added to the network respond according to response sequence number 1. When devices communicate one-to-one, the response sequence number is meaningless and can respond directly.

[0040] In traditional data acquisition systems, dual-channel devices have high hardware complexity, which leads to a significant increase in cost and power consumption, and are difficult to adapt to low-power scenarios. When communication efficiency is low, the device needs to maintain a high power consumption state for a long time and cannot enter sleep mode in time. The embodiment of the present invention aggregates the data of multiple devices through a local area network and uploads them to the satellite in a unified manner, reducing the high-frequency small packet transmission of a single device, increasing the bandwidth utilization of the satellite link by 50%, and reducing the end-to-end delay by 40%. By adopting multi-path redundant transmission (satellite direct connection + inter-device relay), combined with dynamic routing selection of signal quality, communication reliability is improved by 60% in complex environments.

[0041] In traditional data acquisition systems, the signal quality of devices drops sharply in complex electromagnetic environments, resulting in an increased risk of failure in critical data transmission. In an embodiment of the present invention, in a strong electromagnetic interference environment, the device automatically switches to the optimal unicast channel based on real-time signal quality evaluation, and the success rate of critical data transmission remains above 95%. Devices in the local area network serve as relay nodes for each other, and avoid interference areas through multi-hop forwarding, which improves signal quality stability by 3 times. Single-channel devices achieve dual-channel equivalent functions through local area networking, reducing hardware complexity by 70% and overall power consumption by 50%. The device enters sleep mode immediately after completing data transmission. Combined with priority-driven data pre-scheduling, the duration of high power consumption state is shortened by 80%.

[0042] Taking the agricultural environment monitoring system in remote areas as an example, multiple data collection devices are deployed in remote farmlands to monitor soil moisture, temperature, light intensity and other data, and transmit them back to the cloud data processing platform via satellite. The agricultural environment monitoring data collection process provided by the embodiment of the present invention includes: 1. Device networking and data collection: Multiple acquisition devices automatically form a mesh network through non-satellite channels (multicast / unicast). After the new device is powered on, it actively broadcasts the network access request, and the devices in the system synchronously update the system device information table.

[0043] The device connects to the soil sensor through the data acquisition protocol interface module, sets the humidity alarm data to the highest priority (priority level 1), and the normal temperature and humidity data to level 2.

[0044] 2. Data transmission and load balancing: A certain device experienced severe electromagnetic interference due to heavy rain, and its stored high-priority humidity alarm data (close to the storage limit) triggered the data forwarding mechanism.

[0045] The device queries the system device information table, selects a nearby low-load device, and forwards the alarm data to the device through a unicast channel. The latter then uploads the data to the satellite via a satellite channel.

[0046] 3. Global data collaboration: The satellite forwards the data to the ground station, and the data processing platform eventually generates a farmland drought warning report and sends irrigation instructions back to the designated equipment through the ground station.

[0047] Taking the offshore oil pipeline safety monitoring system as an example, data collection equipment is deployed along the offshore oil pipeline to monitor pipeline pressure and corrosion data in real time, and to implement emergency status warnings through satellites. The oil pipeline safety monitoring data collection process provided by the embodiment of the present invention includes: 1. Dynamic priority scheduling: The device sets pressure anomaly data as the highest priority and corrosion data as the secondary priority.

[0048] When a device detects a sudden increase in pressure (priority 1 data), it immediately broadcasts a request to occupy the unicast channel resources through the multicast channel and preferentially uploads the alarm information.

[0049] 2. Anti-interference communication: Strong sea winds and waves cause attenuation of the communication signals between devices. The device automatically switches to a unicast channel with less interference based on spectrum sensing and transmits the data to the satellite through multi-hop forwarding (relayed by other devices).

[0050] 3. Low-power operation: The device only periodically collects data in the non-alarm state (controlled by the low-power module) and reduces the power consumption to the lowest through time-sharing sleep; it quickly wakes up and starts full-power communication in the emergency state.

[0051] Taking the device status monitoring network for polar scientific research as an example, devices are deployed around the polar scientific research station to monitor the device operation status (battery power, temperature) and environmental data (wind speed, ice thickness). The device status monitoring data collection process provided by the embodiments of the present invention includes: 1. Mesh networking and fault tolerance mechanism: When a new device (such as a mobile detection vehicle) joins the network, it broadcasts and synchronizes the system device information table through the temporary central node and dynamically updates the channel occupancy status.

[0052] When a device goes offline due to a low-temperature fault, the system automatically maintains the continuity of data transmission through the redundant path (relayed by other devices).

[0053] 2. Distributed processing of storage pressure: When a device's storage approaches the upper limit due to continuously collecting high-resolution ice layer images, it triggers the load balancing algorithm to fragment and forward some data to 3 low-load devices for storage and upload in batches.

[0054] 3. Role of the computer-readable storage medium: The storage medium pre-sets the priority mapping rules (such as battery power < 20% is emergency data), and the processor module dynamically adjusts the transmission strategy according to the rules.

[0055] The data acquisition system provided by the embodiments of the present invention increases the communication between satellite communication devices to form a local area network. According to a certain strategy, through the local communication between satellite devices, the data of different devices is sent to other devices in the system for storage and subsequent satellite transmission. In order to send the data in the system to the satellite as soon as possible, solve the problem that data cannot be sent out due to poor electromagnetic environment of a certain device, solve the problem of occasional large-scale data acquisition in a small local area within the system, improve the operation efficiency of the system, and reduce the power consumption of the whole system. Generally, the satellite pointing capabilities of different satellite communication devices are the same, and the uplink transmission opportunities of each device are the same. The collected data in the system is divided into priority levels according to the urgency, and the high-priority data is distributed to multiple devices, which can relatively ensure that the high-priority data in the system is sent to the satellite in time.

[0056] Figure 3 is a flowchart of the data acquisition method provided by the embodiments of the present invention, as Figure 3 shown, the data acquisition method provided by the embodiments of the present invention includes: Step 301, establish a local area network through the communication channel between devices, so that multiple acquisition devices directly perform acquisition data interaction and collaboration based on the local area network; Step 302, send the acquisition data collaboratively transmitted between the multiple acquisition devices to the ground station, so that the ground station is used to forward the acquisition data to the data processing platform.

[0057] In the embodiments of the present invention, the data acquisition method further includes: Dynamically adjust the priority of the acquisition data transmission according to the urgency of the acquisition data in each acquisition device.

[0058] In the embodiments of the present invention, the data acquisition method further includes: According to the storage pressure, communication interference situation of the acquisition device and the priority of the data transmission, forward the acquisition data of each acquisition device itself to the low-load acquisition device within the local area network.

[0059] The data acquisition method provided by the embodiments of the present invention establishes a local area network through the communication channel between devices, so that multiple acquisition devices directly perform acquisition data interaction and collaboration based on the local area network; the acquisition data collaboratively transmitted between the multiple acquisition devices is sent to the ground station, so that the ground station is used to forward the acquisition data to the data processing platform, improving the data transmission efficiency in the local area system, reducing the overall power consumption of the system, and solving the occasional intermittent problem.

[0060] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative efforts.

[0061] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the related technology can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A data acquisition system, characterized in that: include: Data processing platform, satellite communication network, ground station and multiple acquisition devices; The multiple acquisition devices form a local area network through an inter-device communication channel, and the multiple acquisition devices directly interact and collaborate on the acquired data based on the local area network; The satellite communication network is used to send the collected data transmitted collaboratively between the multiple collection devices to the ground station; The ground station is used to forward the collected data to the data processing platform.

2. The data acquisition system according to claim 1, characterized in that: After the multiple acquisition devices form a local area network through the inter-device communication channel, the method further includes: Each acquisition device maintains a system device information table, which is used to record the status of each acquisition device and the channel occupancy; When the device status and / or channel occupancy changes, each acquisition device updates its own system device information table and triggers a system broadcast to other acquisition devices in the system; The multiple collection devices collaborate in collecting data based on the updated system device information table.

3. The data acquisition system according to claim 2, characterized in that: Also includes: When a new acquisition device is added to the system, the new acquisition device synchronizes the system device information table through system broadcast to join the local area network.

4. The data acquisition system according to claim 1, characterized in that: The collection device comprises a priority management module, and the priority management module is used to dynamically adjust the priority of collection data transmission according to the urgency of the collection data in each collection device.

5. The data acquisition system according to claim 4, characterized in that: The acquisition device includes a load balancing module, which is used to forward the acquisition data of each acquisition device to the low-load acquisition device in the local area network according to the storage pressure of the acquisition device, communication interference and the priority of the acquisition data transmission output by the priority management module.

6. The data acquisition system according to claim 1, characterized in that: The communication channels between the multiple acquisition devices include: a multicast channel and a unicast channel, wherein: The multicast channel is used to broadcast system status information or networking control instructions; The unicast channel is used for one-to-one data transmission between devices.

7. The data acquisition system according to claim 6, characterized in that: If the current collection device uses a multicast channel to communicate with other collection devices, the current collection device is used as a temporary central node device, and the temporary central node device receives the response information of other collection devices in the system through the unicast channel. When receiving the response information of multiple collection devices, a time-sharing receiving mechanism is adopted, and the time-sharing receiving mechanism includes: After the temporary central node device sends the broadcast information, a timer is started, and a period of time after the timer is started is divided into multiple time slots, and each collection device feeds back response data in the time slot corresponding to its own response sequence number; The response sequence number is allocated according to the order in which each acquisition device joins the network, and a response sequence number is reserved for a new network-joining device.

8. A data collection method, characterized in that: The data acquisition system according to any one of claims 1 to 7 comprises: A local area network is established through communication channels between devices, so that multiple collection devices can directly interact and collaborate on collected data based on the local area network; The collected data cooperatively transmitted between the multiple collection devices is sent to the ground station, so that the ground station is used to forward the collected data to the data processing platform.

9. The data collection method according to claim 8, characterized in that: Also includes: Dynamically adjust the priority of data transmission according to the urgency of the data collected in each collection device.

10. The data collection method according to claim 9, characterized in that: Also includes: According to the storage pressure of the collection device, the communication interference situation and the priority of the data transmission, the collection data of each collection device itself is forwarded to the low-load collection device in the local area network.

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