CN114885275A - High-precision wireless beacon device, system and communication method based on multimode communication - Google Patents

High-precision wireless beacon device, system and communication method based on multimode communication Download PDF

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Publication number
CN114885275A
CN114885275A CN202210290453.7A CN202210290453A CN114885275A CN 114885275 A CN114885275 A CN 114885275A CN 202210290453 A CN202210290453 A CN 202210290453A CN 114885275 A CN114885275 A CN 114885275A
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module
communication module
communication
multimode
positioning
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CN114885275B (en
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庞俊奇
刘文怡
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North University of China
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North University of China
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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
    • H04W4/02—Services making use of location information
    • H04W4/023—Services making use of location information using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • G01S19/14—Receivers specially adapted for specific applications
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • G01S19/33—Multimode operation in different systems which transmit time stamped messages, e.g. GPS/GLONASS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/04—Arrangements for maintaining operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/025—Services making use of location information using location based information parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/12—Messaging; Mailboxes; Announcements
    • H04W4/14—Short messaging services, e.g. short message services [SMS] or unstructured supplementary service data [USSD]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention relates to the technical field of navigation communication positioning, and discloses a high-precision wireless beacon device, a system and a communication method based on multimode communication, wherein the device comprises an antenna array, a microwave network module, a power management module, a main controller, a first wireless communication module and a second wireless communication module, wherein the first wireless communication module and the second wireless communication module respectively comprise an LORA communication module, a cellular mobile network communication module, a Beidou RDSS module and a multimode positioning module; one end of the LORA communication module, the positioning module, the cellular mobile network communication module and the Beidou RDSS module is connected with the main controller, and the other end of the LORA communication module, the positioning module, the cellular mobile network communication module and the Beidou RDSS module are connected with the antenna array through the microwave network module. The invention can improve the reliability of the wireless beacon.

Description

High-precision wireless beacon device, system and communication method based on multimode communication
Technical Field
The invention relates to the technical field of navigation and communication positioning. In particular to an important target searching and positioning and information communication technology, in particular to a high-precision wireless beacon device, a system and a communication method based on multimode communication.
Background
At present, the industries of aviation, aerospace and the like pay more and more attention to the recovery of important parts in the development and operation processes of flying motion products, the appearance and equipment state of the parts can reflect the working conditions of mechanical overload, vibration and thermal shock in the working process, and meanwhile, the real-time data stored by the parts are more related to the health monitoring record of carrier products, and are the most reliable, most scientific, most effective and most direct basis for the upgrade optimization of the performance of the carrier and the analysis of fault reasons, such as a 'black box' of an aircraft. The key to timely positioning and recycling of such products is whether the products have the functions of acquiring positioning information in real time and informing searching personnel in time, and the existing technical means mainly rely on technical personnel to calculate and start searching according to a preset target motion track, or utilize a GPS satellite positioning terminal and a GSM communication technology to accurately position and track a remote target in real time. The former consumes time, manpower, material resources, and is with high costs, and the search effect is poor, and the latter receives mobile operator's basic station arrangement restriction, has the potential safety hazard of location data simultaneously, so urgent need a security height, more reliable, more stable target location means comes to carry out the position acquisition to the target, develops a product that has the beacon function or the beacon device of the same motion trail that the product has, has important value to the search of flight motion class product or part. The beacon device has a power supply function with a lithium battery, can continue a journey for several hours or even dozens of hours according to the battery capacity, and generally, the positioning information of the beacon device is sent in a point-to-point encryption mode in order to protect the safety of a target position.
Disclosure of Invention
The invention overcomes the defects of the prior art, and solves the technical problems that: a high-precision wireless beacon device, a system and a communication method based on multimode communication are provided, and the reliability of the wireless beacon is improved.
In order to solve the technical problems, the invention adopts the technical scheme that: a high-precision wireless beacon device based on multi-mode communication comprises an antenna array, a microwave network module, a power management module, a main controller, a first wireless communication module and a second wireless communication module, wherein the first wireless communication module and the second wireless communication module have the same structure and respectively comprise an LORA communication module, a cellular mobile network communication module, a Beidou RDSS module and a multi-mode positioning module; one end of each of the LORA communication module, the multimode positioning module, the cellular mobile network communication module and the Beidou RDSS module is connected with a main controller, the other end of each of the LORA communication module, the multimode positioning module, the cellular mobile network communication module and the Beidou RDSS module is connected with the antenna array through the microwave network module, the microwave network module comprises a plurality of power division combiners, the antenna array comprises a plurality of antenna pairs, the LORA communication module, the multimode positioning module, the cellular mobile network communication module and the Beidou RDSS module are connected with one antenna pair through the power division combiners, and the main controller is used for fusing positioning information received by the multimode positioning module to form a new information frame and then sending the new information frame through the Beidou RDSS module, the cellular mobile network communication module and the LORA module in the corresponding wireless communication module.
The high-precision wireless beacon device based on multimode communication comprises two main controllers, wherein the two main controllers carry out interactive operation in a high-frequency time-sharing mode;
the multi-mode positioning module comprises a Beidou RNSS positioning module and a GPS/GLONASS positioning module.
The microwave network module comprises eight groups of power dividing combiners; the antenna array comprises a first antenna pair, a second antenna pair, a third antenna pair and a fourth antenna pair;
the Beidou RDSS module and the multimode positioning module in the first wireless communication module are respectively connected with the first antenna pair through a power splitting combiner; the Beidou RDSS module and the multimode positioning module in the second wireless communication module are respectively connected with the second antenna pair through a power splitting combiner;
the cellular mobile network communication module and the LORA communication module in the first wireless communication module are respectively connected with the third antenna pair through a power splitting combiner, and the cellular mobile network communication module and the LORA communication module in the second wireless communication module are respectively connected with the fourth antenna pair through a power splitting combiner.
The first wireless communication module and the second wireless communication module further comprise an RS422 interface module and an optical coupling interface module;
the RS422 interface module is connected with the main controller and is used for realizing data or instruction interaction;
and the optical coupling interface module is connected with the main controller and used for receiving a power supply monitoring signal of an external power supply system.
The antenna pair comprises two groups of antennas which are arranged in a back-to-back manner to form an omnidirectional combination.
The power supply management module comprises a charging management module, a lithium battery pack, a relay module, a two-way selection circuit and a wide-voltage input DCDC module, an external power supply charges the lithium battery pack through the charging management module, the output end of the lithium battery pack is connected with the DCDC module through the relay module and the two-way selection circuit, the external power supply is connected with the DCDC module through the two-way selection circuit, and the DCDC module is used for performing voltage conversion on the output of the external power supply or the output of the lithium battery pack and then supplying power to each module; and the control end of the relay module is connected with the main controller.
The relay module comprises two relay control circuits, the control ends of the two relay control circuits are connected with the output end of the main controller, after relay contacts in the two relay control circuits are connected in parallel, one end of the relay control circuit is connected with the output end of the lithium battery pack, and the other end of the relay control circuit is connected with the double-path selection circuit.
In addition, the invention also provides a high-precision wireless beacon system based on multimode communication, which comprises the high-precision wireless beacon device based on multimode communication and two searching system receiving ends, wherein the searching system receiving ends comprise a mobile receiving module and an LORA receiving module, the mobile receiving module is used for receiving the information sent by the cellular mobile network communication module, and the LORA receiving module is used for receiving the information sent by the LORA communication module.
In addition, the invention also provides a high-precision wireless beacon communication method based on multimode communication, which is realized by adopting the high-precision wireless beacon device based on multimode communication and comprises the following steps:
s1, initializing system parameters through the main controller;
s2, the main controller initializes the watchdog and establishes a positioning information acquisition path;
s3, after the communication modules are reset, judging whether the positioning information is successfully acquired, if so, storing the positioning data, and entering the step S4, and if not, returning to the step S2;
and S4, establishing a wireless transmission channel, and alternately transmitting data through the first wireless communication module and the second wireless communication module.
In step S1, initializing system parameters includes: communication parameter configuration of an LORA communication module, a cellular mobile network communication module and a Beidou RDSS module, external power supply monitoring configuration, lithium battery voltage acquisition parameter configuration and lithium battery control IO output parameter configuration;
the steps S2-S4 are performed alternately by two main controllers.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention provides a high-precision wireless beacon device, a system and a communication method based on multimode communication, wherein the device comprises two groups of independent communication modules, and each 1 group of modules comprises a Beidou RNSS + GPS/GLONASS multimode positioning module, a Beidou RDSS module, a cellular mobile network communication module (4G, 5G and the like) and an LORA communication module, so that the multimode positioning and the communication functions of short message communication, cellular mobile communication, LORA short-distance communication and the like can be realized; the device also comprises a power management module for system power supply and distribution and a main controller for data interaction and processing. The MCU control panel is used as a main controller to perform data interaction with the Beidou RNSS + GPS/GLONASS multimode positioning module, the Beidou RDSS module, the cellular mobile network module and the LORA module, positioning information is sent to a corresponding receiving terminal through the Beidou RDSS module, the cellular mobile network module and the LORA module respectively through the multimode positioning, and the reliability of the wireless beacon is improved.
2. The invention also adopts the redundant backup of the double main controllers to control the work of each communication module, the external communication, the lithium battery control and the like, thereby further improving the reliability of the device.
3. In order to increase the chance of capturing satellite signals, the invention adopts two groups of antennas which are mutually redundant and point to different directions, thereby improving the signal capturing capability of the device.
4. Meanwhile, in order to ensure reliability, the wireless beacon device is also provided with a wired interface module which can perform data interaction with external equipment, so that the functions of configuration information binding, remote control, data monitoring and the like are realized.
Drawings
Fig. 1 is a schematic structural diagram of a high-precision wireless beacon apparatus based on multimode communication according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a high-precision wireless beacon apparatus based on multimode communication according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a power management module according to a third embodiment of the present invention;
FIG. 4 is a schematic circuit diagram of a third relay module according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a high-precision wireless beacon system based on multimode communication according to a fourth embodiment of the present invention;
fig. 6 is a flowchart illustrating a high-precision wireless beacon communication method based on multimode communication according to a fifth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
As shown in fig. 1, a first embodiment of the present invention provides a high-precision wireless beacon device based on multimode communication, including an antenna array, a microwave network module, a power management module, a main controller, a first wireless communication module and a second wireless communication module, where the first wireless communication module and the second wireless communication module have the same structure and both include an LORA communication module, a multimode positioning module, a cellular mobile network communication module and a beidou RDSS module; one end of each of the LORA communication module, the positioning module, the cellular mobile network communication module and the Beidou RDSS module is connected with a main controller, the other end of each of the LORA communication module, the positioning module, the cellular mobile network communication module and the Beidou RDSS module is connected with the antenna array through the microwave network module, the microwave network module 8 groups of power splitting and combining devices are arranged on the antenna array, the LORA communication module, the cellular mobile network communication module, the multimode positioning module and the Beidou RDSS module are all connected with one antenna pair through the microwave network module, and the main controller is used for fusing the multimode positioning module in each wireless communication module, the received positioning information and the equipment state information to form a new information frame and then sending the new information frame through the Beidou RDSS module, the cellular mobile network communication module and the LORA communication module in the corresponding wireless communication module.
Specifically, in this embodiment, the first wireless communication module and the second wireless communication module further include an RS422 interface module and an optical coupling interface module; the RS422 interface module is connected with the main controller and is used for realizing data or instruction interaction; and the optical coupling interface module is connected with the main controller and used for receiving a power supply monitoring signal of an external power supply system.
In addition, in this implementation, the multimode positioning module can position the beacon device through big dipper RNSS, GPS or GLONASS multimode, and big dipper RDSS module refers to big dipper RDSS short message communication module, and the system sends to main control unit after obtaining positioning information through the positioning module, and main control unit fuses the positioning information with equipment state information, forms new information frame, sends out according to predetermined destination address through big dipper RDSS short message communication module, cellular mobile network communication module and the LORA module among two wireless communication modules. In this embodiment, the minimum sending period of each RDSS short message module is 30 seconds, and in order to ensure that the sending interval of each short message is greater than 30 seconds, under the coordination of the main controller, 10 seconds are added to each module, so that a message can be sent every 20 seconds on average, and the frequency and success rate of sending short messages before the device is damaged by falling to the ground can be increased. Therefore, for each short message module, the interval time is about 40 seconds and is greater than the limit of the Beidou card for 30 seconds, and the use requirement is met. If a 60 second card is used, the average speed can be increased to 35 seconds/time by switching time division multiplexing by two cards. If the communication card can be applied to a level-1 second RDSS communication card of a Beidou higher level, the communication speed can be faster.
In this embodiment, LORA communication module, cellular mobile network communication module big dipper RNSS + GPS/GLONASS multimode orientation module cellular mobile network communication module and big dipper RDSS module all adopt ripe technical function module for product inner structure is clear, and the functional partitioning is clear and definite, and the debugging is convenient. In addition, the device includes two sets of big dipper short message modules, has increased the redundancy, and every module sends the interval X second (X is the communication restriction time of current big dipper card), and two short message modules can reduce the transmission interval to being less than X/2 second +5 seconds, if adopt 30 seconds communication card, big dipper RDSS communication frequency can reach 20 seconds. The cellular mobile network communication module may be a mobile/universal 3G, 4G or 5G communication module.
In this embodiment, the dual cellular mobile network communication module and the LORA communication module are used to increase redundancy, and assuming that each module has a transmission interval of Y seconds, the dual cellular mobile network communication module may reduce the transmission interval to less than Y/2 seconds.
In addition, in this embodiment, a watchdog is added in the main control program of the main controller, and no watchdog is fed for more than 4 seconds, and the program is reset and runs from the beginning. And program run-away under abnormal conditions is avoided. The important information in the main control program is monitored in real time through the RS422 interface module and the monitoring equipment, so that the fault can be found in advance, and the fault of the equipment can be diagnosed and analyzed in the later period.
In this embodiment, the LORA communication module is a wireless serial module with small size, low power consumption, high performance and long distance. The module design adopts an efficient ISM frequency band radio frequency spread spectrum chip, the module adopts the working frequency 470 Mhz-510 Mhz recommended by the China LoRa application alliance, parameters can be modified on line through AT instructions, and LORA communication adopts fixed channel broadcast transmission. The LORA has the advantage of long-distance anti-interference. Under an open ideal environment, the communication distance can reach up to 5km, fixed-point transmission, broadcast transmission and channel monitoring are supported, air awakening (ultra-low power consumption) is supported, FE forward error correction is supported, and the communication stability is improved. LORA uses broadcast fixed-point communication to prevent packet collision, similar to cellular mobile network communication modules.
In addition, in this embodiment, a binding function is also configured: in order to guarantee upgradable maintenance of products, a system communication setting interface is reserved in the wireless beacon device, the main controller can be independently configured through RS422 interfaces in computer communication, communication time of each wireless communication module and communication intervals are included, Beidou and cellular network receiving terminal card number configuration and LORA receiving terminal address and channel configuration are included, and meanwhile, power failure of a relay can be controlled.
In addition, the beacon device is also provided with a data monitoring function: in order to store the positioning data of the wireless beacon device, the system can store the data in real time through a wire, and can output the data to a computer or other monitoring terminals through an RS422 interface module for visual display. The visual data analysis software of the monitoring terminal has the function of analyzing the positioning information and the equipment state information in real time, and simultaneously, the target searching navigation is carried out according to the analysis position synchronous navigation map.
Example two
As shown in fig. 2, a second embodiment of the present invention provides a high-precision wireless beacon device based on multimode communication, which includes an antenna array, a microwave network module, a power management module, a first wireless communication module and a second wireless communication module, where the first wireless communication module and the second wireless communication module have the same structure, and unlike the first embodiment, the wireless beacon device in this embodiment includes two main controllers, and the two main controllers perform an interactive operation in a high-frequency time-sharing mode.
In addition, in this embodiment, the microwave network module includes 8 groups of power splitters; the antenna array comprises four antenna pairs, a first antenna pair comprising antennas a1 and a2, a second antenna pair comprising antennas B1 and B2, a third antenna pair comprising antennas C1 and C2, and a fourth antenna pair comprising antennas D1 and D2; the Beidou RDSS module and the multimode positioning module in the first wireless communication module are respectively connected with the first antenna pair through a power splitting combiner; a cellular mobile network communication module and an LORA communication module in the first wireless communication module are respectively connected with a third antenna pair C1 and C2 through a power splitting combiner, and a Beidou RDSS module in the second wireless communication module is connected with a second antenna pair through a power splitting combiner; the Beidou RDSS module and the multimode positioning module in the second wireless communication module are respectively connected with the second antenna pair through a power splitting combiner; the cellular mobile network communication module and the LORA communication module in the second wireless communication module of the cellular mobile network communication module are connected to the fourth antenna pair through a power splitting/combining device. A third antenna pair and a fourth antenna pair, each antenna integrating a LORA antenna and a 4GLTE or 5G antenna. Through the arrangement, the first wireless communication module corresponds to two groups of antenna pairs (A1, A2, C1 and C2), the second wireless communication module corresponds to two groups of antenna pairs (B1, B2, D1 and D2), and each wireless communication module has an antenna pair, so that the safety of the system is further improved.
Further, in this embodiment, the antenna pair includes two sets of antennas, and the two sets of antennas are installed in opposite directions to form an omnidirectional combination. According to the embodiment, the eight-antenna redundancy design can ensure that the navigation satellite signals can be obtained to the greatest extent in any posture, and the communication reliability is improved.
In the embodiment, the low-power-consumption single chip microcomputer is used as the main controller, the product integration level is improved, meanwhile, a high-frequency time-sharing multiplexing mode is adopted, the two CPUs are in interactive operation, in order to ensure that the instantaneous load power is not too large, the two CPUs are in time-sharing wireless module control communication, the power consumption and the size are reduced, and the reliability and the safety are improved.
Further, in this embodiment, in order to realize the antenna miniaturization design of the wireless beacon device, the LORA antenna selects a ceramic printed board with a high dielectric constant, and the 4GLTE antenna or the 5G antenna adopts a PIFA antenna form, and realizes the multi-frequency technology by a slot method.
In this embodiment, the wireless beacon device includes 1 group of wired communication (RS 422 interface module or other wired communication module) with the searched target, 4 groups of wireless communication modules (big dipper RDSS module, multimode positioning module, cellular mobile network communication module, LORA module), each module works independently, except that data information interaction needs to be performed through the main controller, and the basic positioning information sending function of the wireless beacon device is not affected by any module fault. And meanwhile, a dual-communication module is adopted for carrying out redundant positioning information sending design.
In this embodiment, 4 groups of 8 antennas are used to implement external communication of the wireless beacon device. And time-sharing communication is adopted, so that the phenomenon that the transmission power consumption is overlarge at the same time is avoided, and the continuous power supply working time of the lithium battery is shortened. The wireless beacon device belongs to wireless receiving and transmitting equipment, and is communicated with a searching system through a navigation satellite, a base station and the like, all modules are in independent communication, and the searching system has no frequency requirement on receiving and can receive at any time. The searching system realizes unique position identification of different wireless beacon devices according to SIM information installed on the wireless beacon devices, and realizes once 30s communication according to the communication mode of the Beidou card, and the wireless beacon devices are internally provided with double backup modules, so that target positioning can be realized as long as 1 packet of data is received. Therefore, the wireless beacon devices at different positions can work independently without cooperation and can communicate with the remote search system independently.
In this embodiment, since the wireless beacon device has two independent positioning modules, the wireless beacon device can independently acquire the position information and combine the position information into a transmission data packet. As shown in fig. 2, in the layout, the antennas a1 and a2 are installed oppositely, and may form an omni-directional combined antenna pair; the B1 and B2 antennas are arranged oppositely, and can also form an omnidirectional combined antenna pair. The two antenna pairs do not transmit simultaneously, so no frequency interference is caused. Similarly, the cellular mobile network communication module and the LORA module adopt an antenna pair, wherein C1 and C2 are installed in a back-to-back manner, and D1 and D2 are installed in a back-to-back manner.
EXAMPLE III
The third embodiment of the present invention provides a high-precision wireless beacon device based on multimode communication, which is the same as the first embodiment, and includes an antenna array, a microwave network module, a power management module, a first wireless communication module and a second wireless communication module, where the first wireless communication module and the second wireless communication module have the same structure, as shown in fig. 3, and different from the first embodiment, in this embodiment, the power management module includes a charging management module, a lithium battery pack, a relay module P1, a two-way selection circuit U6, and a DCDC module, an external power source is connected to the charging management module through a protection diode U5 to charge the lithium battery pack, an output end of the lithium battery pack is connected to the DCDC module through the relay module P1 and the two-way selection circuit U6, and the external power source is connected to the DCDC module through the two-way selection circuit U6, the DCDC module is used for performing secondary conversion on the output of an external power supply or the output of the lithium battery pack after voltage switching to supply power to each module; and the control end of the relay module is connected with the main controller. The DCDC module comprises a DC conversion chip U4 and a secondary power supply conversion module U8, wherein the DC conversion chip converts an external power supply into 12V direct current voltage, and the secondary power supply conversion module U8 converts the 12V direct current voltage into 3.3V and 5V direct current voltages and then supplies power to the circuit.
Further, as shown in fig. 4, the relay module includes two relay control circuits, the control ends of the two relay control circuits are connected with the output ends of the main controller, namely, the actr 1 and the actr 2, after the relay contacts in the two relay control circuits are connected in parallel, one end of the relay contacts is connected with the output end of the lithium battery pack, and the other end of the relay contacts is connected with the two-way selection circuit. In fig. 4, the actr 1 and the actr 2 respectively adopt different levels to control corresponding relays so that the lithium battery is conducted and output. Preventing the beacon device from powering down due to accidental reset of the system. When the relay is closed, the Lictr1=1 or the Lictr2=0 can ensure that the lithium battery supplies power to the system, and when the relay is opened, the Lictr1=0 and the Lictr2=1 can ensure that the lithium battery supplies power to the system.
Figure DEST_PATH_IMAGE001
In this embodiment, power management module switches the power supply of control group battery through two relays, prevents to lead to unexpected outage because MCU resets, has functions such as EMI anti-electromagnetic interference and DCDC secondary power supply transform simultaneously. The description will be given by taking an external power supply input as an example: the external power supply is introduced through an interface and then divided into 3 paths, wherein 1 path charges a lithium battery through a protection diode U5, 1 path enters a DCDC conversion chip U3 through a branch of a two-path selection diode U6, DC12V is output, and in addition, 1 path enters an optical coupler P2 to acquire power supply state monitoring and inform the MCU whether the external power supply supplies power or not.
The lithium battery carries out charging management through the charging module, get into relay module P1's input simultaneously, the relay module is exported by MCU control signal control, when the relay module switch-on, lithium battery voltage is given DC conversion chip U4 power supply through the other one end of double-circuit selection diode U6, DC conversion chip U4 gives secondary power supply conversion module U8 and each communication module power supply after converting voltage into 12V direct current, secondary power supply conversion module U8 gives main control unit and other module power supplies after with voltage conversion. Multiple power supply conversion prevents the risk of the whole function of the equipment from being lost due to the damage of a certain functional circuit.
In addition, as shown in fig. 3, in this embodiment, the main controller receives a lithium battery power-off instruction output from the outside through the RS422 interface P3, and the MCU interprets the instruction, thereby implementing power-off control of the wireless beacon device. The main controller transmits the real-time positioning information of the wireless beacon device and the working condition of the wireless beacon device to the data monitoring equipment in real time through the RS422 interface P4.
The wireless beacon device of the embodiment can perform wide-voltage power supply work through external 9V-36V. In addition, the device is provided with a lithium battery, can be charged through an external power supply port, and is converted into a lithium battery for power supply when the external power supply is disconnected, and the equipment continues to work until the equipment falls to the ground or the battery is exhausted. In order to protect the lithium battery from long-term multi-frequency overdischarge in a test state, the device is externally connected with a power-off instruction signal of the lithium battery, and the lithium battery can be actively controlled to be disconnected with other circuits in the device through the power-off instruction signal.
Example four
The fourth embodiment of the invention provides a high-precision wireless beacon system based on multimode communication, which comprises the high-precision wireless beacon device based on multimode communication in the first embodiment, the second embodiment or the third embodiment, and two groups of search system receiving ends, wherein the search system receiving ends comprise a mobile receiving module, an LORA receiving module and a short message receiving module, the mobile receiving module is used for receiving information sent by a cellular mobile network communication module, the LORA receiving module is used for receiving information sent by the LORA communication module, and the short message receiving module is used for receiving short message information sent by the Beidou RDSS module. And the receiving ends of the two groups of searching systems can complete function self-checking through mutual communication, so that reliable communication with the beacon device is ensured.
In this embodiment, the cellular mobile network communication module adopts an LTE cat.4 module with a four-module core, and can implement functions such as short message, network communication, base station positioning, FTP, HTTP, and the like. The module carries out positioning information interaction by adopting a network flow encryption communication mode. When the network is poor, the antenna pair connected with the cellular mobile network communication module adopts maximum power transmission. In order to ensure the normal work of the cellular mobile network communication module, the receiving end of the searching system samples the double cards to receive the positioning information. And sending communication information to a receiving module of the searching system in a cross way every 5 s. As shown in fig. 5, the beacon device transmits at interval 1s after a1 and a2, transmits at interval 1s after A3 and a4 after 5s, and returns to a1 and a2 for transmission after 5s, and the whole period is 12s, communication is performed 4 times, and the communication frequency is 0.3 Hz. Not only ensures the communication frequency, but also saves the power consumption.
Similarly, in order to reduce the probability of data loss when each link fails, the Beidou RDSS short message communication module A, B and the receiving ends 1 and 2 of the search system adopt an interactive transmission mode, namely four data links of A-1, B-1, A-2 and B-2, wherein the frequency of each RDSS short message communication module A, B is Xs +5s, but the transmission interval of the RDSS short message communication module A, B is set to about X/2+5s, and the process is repeated. In this mode, even if any one Beidou RDSS module or the receiving end of the searching system fails, data can be ensured to be sent back. In the aspect of transmitting power, the A module and the B module are both 10W transmitting power, even though the power splitting combiner is used, the power distribution on the four antennas can also reach more than 4W, and the requirement of the nominal power of the effective communication of the Beidou RDSS is met.
The high-precision wireless beacon system of the embodiment adopts two sets of search system receiving end devices to alternately receive data sent by the two wireless communication modules to form four communication links which are backup to each other, so that the reliability of a transmission link is improved.
When the wireless beacon device operates, the wireless beacon device needs to be matched with a searching system Beidou RDSS short message communication, a cellular mobile network receiving terminal and an LORA receiving terminal machine carry out positioning data receiving, the wireless beacon device is provided with a Beidou antenna and is installed on a carrier, along with target motion, the position information of change after each positioning is sent to a Beidou satellite through a Beidou module and is forwarded to the searching system through the Beidou satellite, and on the other hand, the state monitoring data of the wireless beacon device is transmitted through an RS422 bus. In order to avoid single point failure as much as possible, the searching system can be provided with two receiving ends, and the two receiving ends upload the data to a computer through a serial port after receiving the data, store, display and analyze the data.
EXAMPLE five
As shown in fig. 6, a fifth embodiment of the present invention provides a high-precision wireless beacon communication method based on multimode communication, which is implemented by using the high-precision wireless beacon apparatus based on multimode communication, and includes the following steps:
s1, initializing system parameters through the main controller; in step S1, initializing system parameters includes: the system comprises a LORA communication module, a cellular mobile network communication module and a Beidou RDSS module, and also comprises external power supply monitoring configuration, lithium battery voltage acquisition parameter configuration and lithium battery control IO output parameter configuration.
And S2, the main controller initializes the watchdog and establishes a positioning information acquisition path.
S3, after the communication modules are reset, judging whether the positioning information is successfully acquired, if so, storing the positioning data, and going to step S4, if not, returning to step S2.
And S4, establishing a wireless transmission channel, and alternately transmitting data through the first wireless communication module and the second wireless communication module.
Specifically, in this embodiment, the steps S2 to S4 are performed alternately by two main controllers, and the two main controllers perform handshaking to ensure time synchronization of the controllers, and in addition, the two main controllers respectively control one wireless communication module to perform data transmission.
In this embodiment, the external system is powered on to supply power to the wireless beacon device, and the wireless beacon device automatically enters a normal operating state. The Beidou RNSS + GPS/GLONASS multimode positioning module starts satellite searching work, the main controller starts to communicate with the multimode positioning module and obtains response information (if the response information cannot be obtained, whether the following operation is continued or not is waited), and a sending frame is constructed by analyzing the received data. And meanwhile, collecting the voltage information of the lithium battery, encoding the voltage information into a sending frame, interacting the main controller with an LORA communication module and a cellular mobile network communication module to confirm the working state, trying to establish data communication with a nearby terminal, and sending the positioning information to a specified terminal. Under the external power supply state, the lithium cell is in charged state, and lithium cell power supply switch is closed simultaneously to prevent that wireless beacon device external power source from breaking off suddenly at any time, resulting in wireless beacon device unexpected outage.
When the external power supply stops, the wireless beacon device detects the state change, the wireless beacon device automatically switches to the lithium battery power supply, and respectively controls A, B the modules to alternately send information to the receiving ends 1 and 2 of the searching system according to the set sending sequence. Even if the multi-mode positioning module does not acquire effective real-time position information, the Beidou RDSS module periodically sends the finally received and cached information to a receiving end of a searching system, and the information is distinguished through time codes in the positioning information. Other partial circuits of the wireless beacon device maintain the previous working state unchanged, and can continuously work for at least more than 3h until a system is damaged or a battery is exhausted, or a power-off command of a lithium battery is received to perform power-off operation.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A high-precision wireless beacon device based on multi-mode communication is characterized by comprising an antenna array, a microwave network module, a power management module, a main controller, a first wireless communication module and a second wireless communication module, wherein the first wireless communication module and the second wireless communication module have the same structure and respectively comprise an LORA communication module, a cellular mobile network communication module, a Beidou RDSS module and a multi-mode positioning module; one end of each of the LORA communication module, the multimode positioning module, the cellular mobile network communication module and the Beidou RDSS module is connected with a main controller, the other end of each of the LORA communication module, the multimode positioning module, the cellular mobile network communication module and the Beidou RDSS module is connected with the antenna array through the microwave network module, the microwave network module comprises a plurality of power division combiners, the antenna array comprises a plurality of antenna pairs, the LORA communication module, the multimode positioning module, the cellular mobile network communication module and the Beidou RDSS module are connected with one antenna pair through the power division combiners, and the main controller is used for fusing positioning information received by the multimode positioning module to form a new information frame and then sending the new information frame through the Beidou RDSS module, the cellular mobile network communication module and the LORA module in the corresponding wireless communication module.
2. The high-precision wireless beacon device based on multimode communication is characterized by comprising two main controllers, wherein the two main controllers perform interactive operation in a high-frequency time-sharing mode;
the multi-mode positioning module comprises a Beidou RNSS positioning module and a GPS/GLONASS positioning module.
3. The high-precision wireless beacon device based on multimode communication of claim 1, wherein the microwave network module comprises eight groups of power splitting and combining devices; the antenna array comprises a first antenna pair, a second antenna pair, a third antenna pair and a fourth antenna pair;
the Beidou RDSS module and the multimode positioning module in the first wireless communication module are respectively connected with the first antenna pair through a power splitting combiner; the Beidou RDSS module and the multimode positioning module in the second wireless communication module are respectively connected with the second antenna pair through a power splitting combiner;
the cellular mobile network communication module and the LORA communication module in the first wireless communication module are respectively connected with the third antenna pair through a power splitting combiner, and the cellular mobile network communication module and the LORA communication module in the second wireless communication module are respectively connected with the fourth antenna pair through a power splitting combiner.
4. A high-precision wireless beacon device based on multi-mode communication according to claim 1, wherein the first wireless communication module and the second wireless communication module further comprise an RS422 interface module and an optical coupling interface module;
the RS422 interface module is connected with the main controller and is used for realizing data or instruction interaction;
and the optical coupling interface module is connected with the main controller and used for receiving a power supply monitoring signal of an external power supply system.
5. A high accuracy wireless beacon apparatus based on multimode communication as claimed in claim 1, wherein said antenna pair comprises two sets of antennas, and the two sets of antennas are installed back to form an omni-directional combination.
6. The high-precision wireless beacon device based on multimode communication of claim 1, wherein the power management module comprises a charge management module, a lithium battery pack, a relay module, a two-way selection circuit and a wide-voltage input DCDC module, an external power supply charges the lithium battery pack through the charge management module, an output end of the lithium battery pack is connected with the DCDC module through the relay module and the two-way selection circuit, the external power supply is connected with the DCDC module through the two-way selection circuit, and the DCDC module is used for performing voltage conversion on an output of the external power supply or an output of the lithium battery pack and then supplying power to each module; and the control end of the relay module is connected with the main controller.
7. The high-precision wireless beacon device based on multimode communication of claim 1, wherein the relay module comprises two relay control circuits, control terminals of the two relay control circuits are connected with an output terminal of the main controller, and after relay contacts in the two relay control circuits are connected in parallel, one terminal of the relay control circuit is connected with an output terminal of the lithium battery pack, and the other terminal of the relay control circuit is connected with the two-way selection circuit.
8. A high-precision wireless beacon system based on multimode communication, which is characterized by comprising the high-precision wireless beacon device based on multimode communication of claim 1, and further comprising two sets of search system receiving terminals, wherein the search system receiving terminals comprise a mobile receiving module and a LORA receiving module, the mobile receiving module is used for receiving information sent by a cellular mobile network communication module, and the LORA receiving module is used for receiving information sent by the LORA communication module.
9. A high-precision wireless beacon communication method based on multimode communication, which is implemented by the high-precision wireless beacon device based on multimode communication of claim 2, and comprises the following steps:
s1, initializing system parameters through the main controller;
s2, the main controller initializes the watchdog and establishes a positioning information acquisition path;
s3, after the communication modules are reset, judging whether the positioning information is successfully acquired, if so, storing the positioning data, and entering the step S4, and if not, returning to the step S2;
and S4, establishing a wireless transmission channel, and alternately transmitting data through the first wireless communication module and the second wireless communication module.
10. The method according to claim 9, wherein the initializing system parameters in step S1 includes: communication parameter configuration of an LORA communication module, a cellular mobile network communication module and a Beidou RDSS module, external power supply monitoring configuration, lithium battery voltage acquisition parameter configuration and lithium battery control IO output parameter configuration;
the steps S2-S4 are performed alternately by two main controllers.
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