CN111935278A - Data acquisition system and method based on LoRa dual-band gateway and nodes - Google Patents
Data acquisition system and method based on LoRa dual-band gateway and nodes Download PDFInfo
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- CN111935278A CN111935278A CN202010789610.XA CN202010789610A CN111935278A CN 111935278 A CN111935278 A CN 111935278A CN 202010789610 A CN202010789610 A CN 202010789610A CN 111935278 A CN111935278 A CN 111935278A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/10—Flow control between communication endpoints
- H04W28/14—Flow control between communication endpoints using intermediate storage
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/38—Services specially adapted for particular environments, situations or purposes for collecting sensor information
Abstract
The application relates to a data acquisition system and a method based on LoRa dual-band gateway and nodes, which comprises the following steps: the system comprises a plurality of detection groups, a region to be detected is divided into a plurality of subareas, each subarea is provided with one detection group, each detection group comprises a controller and a sensor group arranged in the subarea, each sensor group comprises a plurality of geological sensors used for detecting single geological information, the controller is used for communicating and supplying power to the geological sensors, the geological sensors of the detection groups are dispersedly arranged in the subareas to detect the integral geological information of the subareas and generate detection signals carrying the integral geological information, and the controller receives and processes the detection signals and transmits wireless signals carrying the integral geological information; and the local area gateway is wirelessly connected to the detection groups, receives the wireless signals of each detection group and generates uploading signals which are loaded with geological information and used for uploading the server. The geological information data acquisition system has the technical effects of reducing wiring of the geological information data acquisition system and improving stability of the system.
Description
Technical Field
The application relates to the field of geological disaster monitoring data acquisition and transmission, in particular to a data acquisition system and method based on LoRa dual-band gateways and nodes.
Background
The geological environment is complex in China, geological activities are frequent, and geological disasters such as collapse, landslide, debris flow and the like occur frequently, so that the population affected and threatened by the geological disasters is large. The system is of great importance for providing a perfect geological disaster monitoring (ground disaster monitoring) early warning system for guaranteeing the life and property safety of people to the maximum extent. In the ground disaster monitoring system, a sensor is required to monitor the geological state in real time, a Data Acquisition (DAQ) system acquires and transmits back the measurement information of the sensor, and abnormal changes of the geological state are found in time through real-time data analysis, so that ground disaster monitoring is realized. Geological monitoring has multiple modes, including modes such as unmanned aerial vehicle, sensor and satellite monitoring. The sensor data acquisition system has the advantages of full-time monitoring, low cost, efficient transmission and the like.
The DAQ system is widely applied, and can be designed in a targeted manner according to different application requirements. For a single application scenario with simple requirements and environmental friendliness, the DAQ system is simple in design and easy to implement, and extremely stable performance can be achieved. However, in geological disaster monitoring, environmental factors such as internal stress deformation, surface displacement cracks, water level rainfall and the like of a side slope are mainly monitored, the arrangement positions of sensors are complicated and changeable, such as the inside of a soil body, the surface of the soil body, feet of a mountain, the top of the mountain and the like, and meanwhile, the mountain is complex in high-low relief and wide and discrete in distribution range of measuring points, so that the problems of difficult wiring, difficult line protection and the like of the monitoring sensors exist in a wired networking mode.
Disclosure of Invention
In order to reduce wiring of a geological information data acquisition system and improve stability of the system, the application provides a data acquisition system and method based on LoRa dual-band gateways and nodes.
In a first aspect, the present application provides a data acquisition system based on a LoRa dual-band gateway and a node, which adopts the following technical scheme:
a data acquisition system based on a LoRa dual-band gateway and a node comprises:
the system comprises a plurality of detection groups, a region to be detected is divided into a plurality of subareas, each subarea is provided with one detection group, each detection group comprises a controller and a sensor group arranged in the subarea, each sensor group comprises a plurality of geological sensors used for detecting single geological information, the controller is used for communicating and supplying power to the geological sensors, each geological sensor of the detection groups is dispersedly arranged in the subarea to detect the integral geological information of the subarea and generate a detection signal carrying the integral geological information, and the controller receives and processes the detection signal and transmits a wireless signal carrying the integral geological information;
and the local area gateway is wirelessly connected to the detection groups, receives the wireless signals of each detection group and generates uploading signals which are loaded with geological information and used for uploading the server.
Through adopting above-mentioned technical scheme, because the area of the region of awaiting measuring is very broad usually, if like conventional wired network deployment mode, install each geological sensor everywhere in the region of awaiting measuring and connect in order to carry out unified communication and power supply with the utilization line, then will lead to the electric wire overlength, not only influence signal transmission efficiency and electric energy transmission efficiency, inconvenient cloth of burying, the damage takes place easily in the electric wire that overlength and complicatedly complicated simultaneously buries cloth, leads to geological sensor to be out of order. In the application, the region to be detected is manually divided into a plurality of subareas, and geological data in each subarea is detected by one detection group. The sensor group in the detection group comprises a plurality of types of geological sensors, such as a humidity sensor, a temperature sensor, a pressure sensor and the like, is used for detecting various geological conditions, needs to be arranged at different positions in each area, has different acquisition frequencies, and is in a dormant state when not working, for example, when the acquisition frequency is very low, the geological sensors between two adjacent geological information acquisition are in the dormant state, and the power is saved.
The amount of wiring is significantly reduced by using a single controller to communicate and power each of the geological sensors in the area. Based on practical considerations, the area of the patch is usually large, the number of geological sensors arranged in the patch is large, but the acquisition frequency of the geological sensors is low, on average, most address sensors are in a dormant state in each time interval, and only a small part of the address sensors are in operation, so that the power consumption is low, and one controller is enough to supply power to the sensor group without special power supply of extra wires for the geological sensors.
The controller receives single geological information detected by each geological sensor in the parcel, collects and integrates the single geological information into integral geological information, and transmits the integral geological information to the local area gateway through wireless signals in real time, and the local area gateway converts the received wireless signals into uploading signals and uploads the uploading signals to the server for processing. Different districts are far away from each other, and the local area gateway is in wireless connection with the controllers of the plurality of districts, so that the wiring amount can be effectively reduced.
Preferably, the controllers in the detection groups acquire and store physical addresses of geological sensors in the same group, and upload the physical addresses to the server through the local area gateway; the local area gateway receives a configuration signal which is sent by a server and loaded with configuration information, sends a corresponding wireless signal to the detection group, and the controller in the detection group analyzes the wireless signal, pairs a physical address in the wireless information with a physical address stored in the geological sensor, and configures the sensor group of the group according to the configuration information based on the pairing result.
By adopting the technical scheme, the controller in the detector group stores the physical address of the geological sensor in the group, and the controller can send a signal carrying configuration information to the geological sensor according to the address. Because in daily maintenance, the geological sensors in the detector group can be increased or decreased, the models can be changed, and the like, the controller is required to update the information at the moment so as to conveniently acquire single geological information. Meanwhile, when the geology is unstable, the server can download configuration signals, and the controller configures the sensor group according to the configuration information so as to change the sampling frequency of the geological sensor and conveniently acquire the signals in time.
Preferably, the controller compares geological information carried in the detection signal with a preset threshold value, selects a conventional frequency band or an emergency frequency band based on a comparison result, modulates the integral geological information into a wireless signal with corresponding frequency and sends the wireless signal to the local area gateway; the controller also controls the geological sensor to increase or decrease the detection frequency based on the comparison.
By adopting the technical scheme, when the geological condition is stable, single geological information measured by each geological sensor can be within a stable threshold range, and cannot exceed the range when fluctuation occurs. Under the condition, the wireless signals sent by each detection group occupy a certain frequency band respectively. When the geological condition starts to be unstable, for example, a certain hill is landslide, or a certain foundation pit is collapsed, the controller in the area where the controller is located monitors that a plurality of pieces of single geological information are detected to exceed the threshold range, and the controller controls the geological sensor in the area to greatly increase the sampling frequency based on the comparison result so as to improve the detection precision. At this time, the amount of information acquired in unit time greatly increases, and the controller needs to occupy a larger bandwidth when uploading information.
Since each controller needs to be arranged with a fixed frequency band, if enough bandwidth is reserved for each controller at the beginning of design, the amount of controllers corresponding to each local area gateway will be less, and the signal base stations will be more dense. If the bandwidth for uploading signals when the geological condition is stable is reserved for each controller at the beginning of design, when the sampling frequency of the geological sensor is increased, the signals sent by the controllers are easy to be blocked, and the uploading effect is influenced. Therefore, in the scheme, an emergency frequency band with a large bandwidth is additionally arranged. Under the condition of stable geological conditions, the emergency frequency band is idle; when the geological condition of a certain plot or a plurality of plots is unstable, the controller adjusts the frequency band of the uploading signal to an emergency frequency band and uploads the detected geological information at a high speed.
Preferably, the detection frequency of the geological sensor is 10-30 min/time when the detection signal is lower than a preset threshold value, and the detection frequency of the geological sensor is 5-10 s/time when the detection signal is higher than the preset threshold value.
By adopting the technical scheme, when the geological condition is stable, the detection frequency of the geological sensor does not need to be too high, otherwise, electricity is consumed. When the geological condition changes, the detection frequency needs to be increased to acquire geological change information in real time.
Preferably, the local area gateway is wirelessly connected to at least 30 detection groups, and the controller in each detection group is electrically connected to at least 4 geological sensors.
For the wireless networking mode, if each geological sensor is subjected to decentralized power supply and is uploaded to the wireless gateway in a unified mode through wireless signals, the uploading signals of each geological sensor need to occupy different frequency bands, and the problem of channel congestion is easily caused by a plurality of geological sensors. In this application, through adopting above-mentioned technical scheme, even a plurality of geological sensor electric wires are in single controller in order to carry out power supply and communication, and single controller integrates the information that a plurality of geological sensor gathered and again wirelessly uploads to local area gateway, has practiced thrift the frequency band greatly to guarantee to survey the group under emergency and not take place to block up.
Furthermore, each lan gateway can only support no more than 15 probe groups if enough bandwidth is reserved for each controller at the beginning of the design, as far as the setting of the emergency band is concerned or not. However, at the beginning of the design, only the bandwidth for uploading signals when the geological condition is stable is reserved for each controller, and the emergency frequency band is set for emergency use, so that the local area gateway can support at least 30 detection groups.
The geological sensor also has great difference with the sensor seen in daily life, and the data collected by the sensor in daily life, such as the sensor in a water meter, is usually only a few bytes, can be conveniently transmitted by utilizing the Internet of things, and has low requirement on bandwidth. And the geological sensor is based on the sensor type, the detection information acquired once is up to hundreds of KB and down to hundreds of bytes, and the occupation of the frequency band is high.
Preferably, the wireless communication technology of the wireless gateway and the controller is a LoRa communication technology.
Through adopting above-mentioned technical scheme, the 433MHz frequency channel is used to loRa, and its transmission has the characteristics of long distance and low power dissipation, is applicable to the landform that the geological conditions is more complicated. In contrast, the transmission distance, power consumption, and the like of signal transmission protocols such as 4G and radio frequency are limited.
Preferably, a buffer area is arranged in the controller, the buffer area is used for storing the received detection signal as buffer information when the controller is in an offline state, and the controller reads the buffer information in the buffer area and uploads the buffer information to the local area gateway when the controller is recovered to the online state.
By adopting the technical scheme, when the external environment is severe, the channel is occupied or the data is congested, such as rainstorm or thunderstorm weather influences the output of wireless signals, the controller is switched to an off-line state, the collected detection signals are stored as cache information until the communication with the local area gateway is recovered, and then the information in the cache area is read and uploaded. Therefore, the method has good resistance to communication interference, channel occupation and data congestion.
In a second aspect, the present application provides a data acquisition method based on an LoRa dual-band gateway and a node, which adopts the following technical scheme:
a system based on a data acquisition method, comprising the steps of:
detecting single geological information at each part of the block;
collecting single geological information and integrating the single geological information into integral geological information;
and carrying the whole geological information on a wireless signal and sending the wireless signal to a local area gateway.
Drawings
Fig. 1 is a schematic structural diagram of a data acquisition system based on an LoRa dual-band gateway and a node in an embodiment of the present application.
Detailed Description
The present application is described in further detail below with reference to fig. 1.
Geological disaster monitoring, mainly monitor environmental factors such as the inside atress of side slope warp, surface displacement crack and water level rainfall, the position that the sensor was arranged can be more complicated changeable, like inside the soil body, the soil body surface, the mountain foot, mountain top etc. mountain height relief topography is complicated simultaneously, measurement station wide distribution range is wide and discrete, consequently there is the monitoring sensor wiring difficulty in wired network deployment mode, the difficult scheduling problem of line protection, conventional wireless network deployment transmission has data transmission to block much, transmission distance is far away, problem such as operator's signal unstability.
The embodiment of the application discloses a data acquisition system based on a LoRa dual-band gateway and a node. Referring to fig. 1, the data acquisition system includes a plurality of probe groups for acquiring geological information, a local area gateway for receiving and uploading the geological information acquired by the probe groups, and a server for receiving the local area gateway upload information and downloading a configuration signal to the local area gateway to control the probe groups.
The area in the region that awaits measuring is very broad usually, if install each geological sensor everywhere in the region that awaits measuring and connect in order to unify communication and power supply with the utilization line, then will lead to the electric wire overlength, not only influence signal transmission efficiency and electric energy transmission efficiency, inconvenient cloth of burying, the damage takes place easily for the electric wire that overlong and complicatedly bury the cloth simultaneously, leads to the geological sensor to be out of order. In this embodiment, the region to be measured is artificially divided into a plurality of parcel areas, and the parcel areas are divided based on the overall structure of the terrain, for example, a foundation pit system is used as a parcel area, and for example, a slope system is used as a parcel area. Each district is installed one respectively and is surveyed the group, survey the group including a controller with install the sensor group in the district, the sensor group contains a plurality of geological sensor that are used for detecting single geological information, these geological sensor include the multiple type, for example humidity transducer, temperature sensor, pressure sensor etc. for detect various different geological conditions, the dispersion sets up in the district everywhere different positions in order to gather single geological information, its frequency of collection is also diverse, under the condition of not taking place geological disasters, the frequency of collection is between 10~30 min/time. When the geological sensor does not work, the geological sensor is in a dormant state, for example, when the acquisition frequency is very low, the geological sensor is in the dormant state between two acquisitions, and the geological sensor is favorable for saving electric power.
The controller is used for communicating and supplying power to the geological sensors, in other words, the controller is a connection node of each geological sensor in one sensor group. All the single geological information acquired by the sensor group is the overall geological information corresponding to the local area, and the detection signal generated by the sensor group is loaded with the overall geological information. The controller receives and processes the detection signal and transmits a wireless signal carrying integral geological information; local area gateway and controller wireless connection, in this embodiment, the wireless communication technology of wireless gateway and controller is the loRa communication technology, and the loRa communication technology uses the 433MHz frequency channel, and its transmission has the characteristics of apart from long and low power dissipation, is applicable to the more complicated landform of geological conditions. In contrast, the transmission distance, power consumption, and the like of signal transmission protocols such as 4G and radio frequency are limited. The wireless gateway converts the received wireless signals into uploading signals and uploads the uploading signals to the server for processing. Different districts are far away from each other, and the local area gateway is in wireless connection with the controllers of the plurality of districts, so that the wiring amount can be effectively reduced.
And the controllers in the detection groups acquire and store the physical addresses of the geological sensors in the same group and upload the physical addresses to the server through the local area gateway. In the daily maintenance, the geological sensors in the sensor group are increased or decreased, the models of the geological sensors are changed, and the like, so that the controller is required to update the information, and the geological sensors are conveniently controlled and collected by the controller. Meanwhile, the controller uploads the physical address to the server, and the server updates related data in the database. When the geological sensor needs to be temporarily started, closed, adjusted in acquisition frequency and the like, the server sends a configuration signal carrying configuration information to the local area gateway, the local area gateway carries the configuration information on a wireless signal and sends the configuration information to a corresponding detection group, a controller in the detection group analyzes the received wireless signal, matches a physical address in the wireless signal with a physical address stored in the geological sensor, and configures the sensor group according to the configuration information based on a matching result. For example, when the geology is unstable, the server downloads a configuration signal, and the controller configures the sensor group according to the configuration information so as to improve the sampling frequency of the geological sensor and facilitate timely acquisition of the signal.
In daily detection, the controller compares geological information carried in the detection signal with a preset threshold, and when the geological information exceeds the preset threshold, for example, the humidity in the geological information exceeds the preset humidity threshold, or the temperature in the geological information exceeds the preset temperature threshold, it is determined that the geological condition is unstable. Otherwise, when the geological information does not exceed the preset threshold value, the geological condition is judged to be stable.
When the geological condition is stable, the single geological information measured by each geological sensor is within a threshold range corresponding to the single geological information, and the threshold range is not exceeded even if fluctuation occurs. Under the condition, the wireless signals sent by each detection group occupy a certain frequency band respectively. When the geological condition starts to be unstable, for example, a certain hill slope is about to slide or a certain foundation pit is about to collapse, the controller in the area where the controller is located monitors that a plurality of pieces of single geological information are detected to exceed the threshold range, and the controller controls the geological sensor in the area to greatly improve the sampling frequency so as to improve the detection precision. At this time, the amount of information acquired in unit time greatly increases, and the controller needs to occupy a larger bandwidth when uploading information. However, since each controller needs to be arranged with a fixed frequency band, if enough bandwidth is reserved for each controller at the beginning of the design, the amount of controllers corresponding to each local area gateway will be small. If the bandwidth for uploading signals when the geological condition is stable is reserved for each controller at the beginning of design, when the sampling frequency of the geological sensor is increased, the signals sent by the controllers are easy to be blocked, and the uploading effect is influenced.
Therefore, the frequency band of wireless signal transmission between the local area gateway and the controller is divided into a conventional frequency band and an emergency frequency band, the conventional frequency band is used for signal transmission between the local area gateway and the controller under the condition that the geological condition is stable, and the emergency frequency band is used for signal transmission between the local area gateway and the controller under the condition that the geological condition is unstable. And after comparing the geological information carried in the detection signal with a preset threshold value, the controller selects a conventional frequency band or an emergency frequency band based on a comparison result to modulate the integral geological information into a wireless signal with corresponding frequency and sends the wireless signal to the local area gateway. For example, when the geological condition is stable, the controller selects the conventional frequency band to modulate the overall geological information into a wireless signal and transmits the wireless signal to the local area gateway, and the emergency frequency band is idle. When the geological condition of a certain district or a plurality of districts is unstable, the controller adjusts the frequency band of the uploading signal to an emergency frequency band and uploads the detected geological information to the local area gateway and the server at a high speed based on the emergency frequency band.
In addition, the controller controls the geological sensor to increase or decrease the detection frequency based on the comparison result of geological information carried in the detection signal and a preset threshold value. For example, when the geological condition is stable, the controller controls the geological sensor to reduce the detection frequency, and in the embodiment, the detection frequency of the geological sensor when the detection signal is lower than the preset threshold is 10-30 min/time. When the geological condition is unstable, the controller controls the geological sensor to increase the detection frequency, and in the embodiment, the detection frequency of the geological sensor is 5-10 s/time when the detection signal is higher than the preset threshold. It can also be seen here that the acquisition frequencies of the geological sensors differ by as much as a hundred times in both stable and unstable geological conditions.
In addition, the local area gateway is wirelessly connected with at least 30 detection groups, and the controllers in the detection groups are at least connected with 4 geological sensors through wires. A plurality of geological sensor electric wires are connected with the controller to supply power and communicate, and a single controller integrates information collected by a plurality of geological sensors and then wirelessly uploads the information, so that frequency bands are greatly saved, and the detection group is guaranteed not to be blocked in emergency. With respect to the setting or not of the emergency band, each lan gateway can only support no more than 15 probe sets if enough bandwidth is reserved for each controller at the beginning of the design. However, at the beginning of the design, only the bandwidth for uploading signals when the geological condition is stable is reserved for each controller, and the emergency frequency band is set for emergency use, so that the local area gateway can support at least 30 detection groups.
In addition, a cache region is arranged in the controller, the cache region is used for storing the received detection signals as cache information when the controller is in an off-line state, and the controller reads the cache information in the cache region and uploads the cache information to the local area gateway when the controller is recovered to the on-line state. When the external environment is severe, the channel is occupied or the data is congested, for example, rainstorm or thunderstorm weather influences the output of wireless signals, the controller is switched to an off-line state, the collected detection signals are stored as cache information until the local area gateway recovers communication, and then the information in the cache area is read and uploaded. Therefore, the method has good resistance to communication interference, channel occupation and data congestion. On the other hand, the channel congestion problem is solved without adopting a cache form, and on the one hand, the geological condition needs to be known in real time according to the detected geological information. Under normal conditions, the signal acquisition speed is low and is 10-30 min/time, and if caching is carried out, delay of several hours or even half a day can be caused, so that the problem can be caused.
The embodiment of the application further discloses a data acquisition system based on the LoRa dual-band gateway and the nodes, which comprises the following steps:
detecting single geological information at each part of the block;
collecting single geological information and integrating the single geological information into integral geological information;
and carrying the whole geological information on a wireless signal and sending the wireless signal to a local area gateway.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. A data acquisition system based on dual-band gateway of loRa and node, its characterized in that includes:
the system comprises a plurality of detection groups, a region to be detected is divided into a plurality of subareas, each subarea is provided with one detection group, each detection group comprises a controller and a sensor group arranged in the subarea, each sensor group comprises a plurality of geological sensors used for detecting single geological information, the controller is used for communicating and supplying power to the geological sensors, each geological sensor of the detection groups is dispersedly arranged in the subarea to detect the integral geological information of the subarea and generate a detection signal carrying the integral geological information, and the controller receives and processes the detection signal and transmits a wireless signal carrying the integral geological information;
and the local area gateway is wirelessly connected to the detection groups, receives the wireless signals of each detection group and generates uploading signals which are loaded with geological information and used for uploading the server.
2. The LoRa dual-band gateway and node based data acquisition system according to claim 1, wherein the controllers in the detection groups acquire and store physical addresses of geological sensors in the same group and upload the physical addresses to the server through a local area gateway; the local area gateway receives a configuration signal which is sent by a server and loaded with configuration information, sends a corresponding wireless signal to the detection group, and the controller in the detection group analyzes the wireless signal, pairs a physical address in the wireless information with a physical address stored in the geological sensor, and configures the sensor group of the group according to the configuration information based on the pairing result.
3. The LoRa dual-band gateway and node-based data acquisition system of claim 1, wherein the controller compares geological information carried in the detection signal with a preset threshold, and selects a conventional frequency band or an emergency frequency band based on the comparison result to modulate the whole geological information into a wireless signal with corresponding frequency and send the wireless signal to the local area gateway; the controller also controls the geological sensor to increase or decrease the detection frequency based on the comparison.
4. The LoRa dual-band gateway and node-based data acquisition system as claimed in claim 3, wherein the detection frequency of the geological sensor is 10-30 min/time when the detection signal is lower than the preset threshold, and the detection frequency of the geological sensor is 5-10 s/time when the detection signal is higher than the preset threshold.
5. The LoRa dual band gateway and node based data collection system of claim 1, wherein said local area gateway is wirelessly connected to at least 30 probe groups, and the controllers in each probe group are wired to at least 4 geological sensors.
6. The data acquisition system based on the LoRa dual-band gateway and node as claimed in claim 1, wherein the wireless communication technology of the wireless gateway and the controller is LoRa communication technology.
7. The data acquisition system based on the LoRa dual-band gateway and the node as claimed in claim 1, wherein a buffer is disposed in the controller, the buffer is configured to store the received detection signal as buffer information when the controller is in an offline state, and the controller reads the buffer information in the buffer and uploads the buffer information to the local area gateway when the controller is in an online state.
8. A data acquisition method based on an LoRa dual-band gateway and a node is characterized by comprising the following steps:
detecting single geological information at each part of the block;
collecting single geological information and integrating the single geological information into integral geological information;
and carrying the whole geological information on a wireless signal and sending the wireless signal to a local area gateway.
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| CN114007148A (en) * | 2021-10-21 | 2022-02-01 | 贵州师范学院 | Hydrology monitoring system based on loRa gateway unmanned aerial vehicle crowd |
| CN114125726A (en) * | 2021-11-01 | 2022-03-01 | 哈尔滨工业大学 | Information piggybacking device, system and method for wide area Internet of things in mMTC (machine type communication) background |
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