CN109672574B - Multilink self-adaptive switching module for unmanned platform measurement and control communication - Google Patents
Multilink self-adaptive switching module for unmanned platform measurement and control communication Download PDFInfo
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- CN109672574B CN109672574B CN201910085020.6A CN201910085020A CN109672574B CN 109672574 B CN109672574 B CN 109672574B CN 201910085020 A CN201910085020 A CN 201910085020A CN 109672574 B CN109672574 B CN 109672574B
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- H—ELECTRICITY
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- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
- H04L41/0668—Management of faults, events, alarms or notifications using network fault recovery by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure
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- H—ELECTRICITY
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- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0805—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability
- H04L43/0811—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking connectivity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/10—Active monitoring, e.g. heartbeat, ping or trace-route
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Abstract
The invention discloses a multilink self-adaptive switching module for unmanned platform measurement and control communication, which comprises: the device comprises a DSP chip, N first network port chips, N first network ports and N manual change-over switches; each first internet access chip and each manual switch are correspondingly connected to the DSP chip; the manual change-over switch is used for transmitting a level signal to the DSP chip; the DSP chip stores a preset link gating priority and is used for sending a chip selection signal to a corresponding first internet access chip; the first network port chips are connected with the first network ports in a one-to-one correspondence mode and used for gating the corresponding first network ports according to the received chip selection signals; each first network port is used for connecting different communication link end machine equipment. The invention combines automatic switching and manual switching based on a DSP chip and a high-speed network port chip, and solves the problems of time delay, serial port communication rate limitation and the like existing in manual switching.
Description
Technical Field
The invention belongs to the technical field of communication, and particularly relates to a multilink self-adaptive switching module for unmanned platform measurement and control communication.
Background
At present, unmanned aerial vehicles, unmanned ships and unmanned vehicle platforms are applied to military and civil occasions and have a rapid growth trend. An unmanned platform which is remotely controlled and remotely measured by means of wireless communication is mainly used for executing tasks which are tedious, dangerous and uncomfortable to be executed by the unmanned platform. Once equipped with an advanced control system, a communication system and a sensing system, the unmanned platform can not only undertake military operational tasks such as information collection, anti-terrorism and anti-diving, investigation and detection, accurate striking and the like, but also execute tasks such as geographical mapping, modern agriculture, electric power inspection, disaster rescue and the like in civil scenes. In continuous development, an unmanned platform utilizes a novel and reliable communication network technology to realize mutual cooperation and clustering tasks and complete more complex task types, which plays an extremely important role in the convergence development process of military and civilian.
Because the wireless channel environment changes and signal interference may cause the breakage of a communication link and the failure of wireless control of the unmanned platform, in order to ensure the reliability of the communication link, protect the equipment safety of the unmanned platform and ensure the realization of the task of the unmanned platform, a plurality of communication links are carried simultaneously in the design of a communication system, and different links have different performance characteristics, such as high speed, long distance, strong interference resistance and the like.
The multi-link switching is a problem to be solved in practical application. If the manual monitoring and switching method is adopted, the risks of long operation delay and manual missing of switching time exist. If the automatic switching method is adopted, special link switching equipment, an automatic switching algorithm and software need to be designed, the on-off state of each link is judged in real time, and the problems of universality, expansibility and the like need to be solved. Some existing automatic switching design schemes adopt an RS422 serial port as a link interface, the supported link communication rate is not high, and the development trend of a high-speed network communication technology taking an IP protocol as a core in the current communication system and equipment design cannot be adapted.
Disclosure of Invention
The invention aims to: in order to overcome the problems of time delay, serial port communication rate limitation and the like in manual switching of multilink use in unmanned platform measurement and control communication, a multilink self-adaptive switching module is provided.
The technical scheme adopted by the invention is as follows:
a multilink adaptive switching module for unmanned platform measurement and control communication, comprising: the device comprises a DSP chip, N first network port chips, N first network ports and N manual change-over switches; each first internet access chip and each manual switch are correspondingly connected to the DSP chip; the manual change-over switch is used for transmitting a level signal to the DSP chip; the DSP chip stores a preset link gating priority and is used for sending a chip selection signal to a corresponding first internet access chip; the first network port chips are connected with the first network ports in a one-to-one correspondence mode and used for gating the corresponding first network ports according to the received chip selection signals; each first network port is used for connecting different communication link end machine equipment.
Furthermore, each first network port chip is provided with a link on-off feedback unit connected to the DSP chip; and the link on-off feedback unit is used for sending link interruption information to the DSP chip.
Further, the link on-off feedback unit sends heartbeat packets to a link terminal machine connected with the current link periodically, and the heartbeat packets are transmitted to a multilink self-adaptive switching module of an opposite terminal through a communication link; the multilink self-adaptive switching module of the opposite terminal feeds back the heartbeat packet and transmits the heartbeat packet to the local multilink self-adaptive switching module through the link terminal machine; if the local link on-off feedback unit receives the feedback heartbeat packet within the specified time, judging that the current link is connected; if the link on-off feedback unit does not receive the feedback heartbeat packet within the specified time, judging that the current link is off, and sending link interruption information to the DSP chip; the heartbeat packet comprises a MAC frame head, an IP frame head, a UDP packet head and self-defined service data.
Further, the multi-link adaptive switching module for unmanned platform measurement and control communication further includes: a serial port transceiver chip and a multi-core connector; and the multi-core connector is connected to the DSP chip through the serial port transceiving chip.
Further, the serial port transceiver chip comprises an RS232 serial port transceiver chip and an RS422 serial port transceiver chip; the multi-core connector comprises an RS232 interface and an RS422 interface; the RS232 interface is connected to the DSP chip through an RS232 serial port transceiver chip; and the RS422 interface is connected to the DSP chip through an RS422 serial port transceiving chip.
Further, the multi-core connector further comprises a JTAG simulation interface connected to the DSP chip.
Further, the multi-link adaptive switching module for unmanned platform measurement and control communication further includes: the second network port and the second network port chip are connected; the second network port is used for connecting an unmanned platform control system; and the second network port chip is connected to the DSP chip.
Furthermore, the multi-link self-adaptive switching module for the unmanned platform measurement and control communication further comprises N link state indicator lamps connected to the DSP chip, and each link state indicator lamp displays a corresponding link on-off state and a corresponding link gating state.
Furthermore, the multi-link self-adaptive switching module for unmanned platform measurement and control communication further comprises a power interface and a power switch which are connected; the power interface is used for being connected with an external power supply to supply power and controlling the on-off of the power supply through the power switch.
Further, the multi-link adaptive switching module for unmanned platform measurement and control communication further includes: and the EEPROM storage chip is connected with the DSP chip.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the invention combines automatic switching and manual switching based on a DSP chip and a high-speed network port chip, supports multilink self-adaptive switching and manual switching, overcomes the problems of time delay, serial port communication rate limitation and the like of manual switching, and can be widely applied to unmanned platform measurement and control communication based on an IP protocol high-speed network in various industries at present.
2. The invention adopts the design of the link access interface which takes the high-speed network port as the main part and the serial port as the auxiliary part, and the serial port can be used as the standby access interface of the link end machine so as to meet more application scenes.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a block diagram of a multilink adaptive handover module according to the present invention.
Fig. 2 is an application architecture diagram of the multilink adaptive handoff module of the present invention.
Fig. 3 is a schematic diagram of a process of determining the on-off state of a link by a link on-off feedback unit of the multi-link adaptive switching module according to the present invention.
Fig. 4 is a circuit diagram of a memory chip of the multilink adaptive switching module of the present invention.
Fig. 5a and 5b are circuit diagrams of the automatic switching function of the multilink adaptive switching module of the present invention.
Fig. 6a and 6b are circuit diagrams of the manual switching function of the multilink adaptive switching module of the present invention.
Fig. 7a and 7b are serial port circuit diagrams of the multilink adaptive switching module of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The invention provides a multilink self-adaptive switching module for unmanned platform measurement and control communication, as shown in fig. 1, comprising: the device comprises a DSP chip, N first network port chips, N first network ports and N manual change-over switches; each first internet access chip and each manual switch are correspondingly connected to the DSP chip; the manual change-over switch is used for transmitting a level signal to the DSP chip; the DSP chip stores a preset link gating priority and is used for sending a chip selection signal to a corresponding first internet access chip; the first network port chips are connected with the first network ports in a one-to-one correspondence mode and used for gating the corresponding first network ports according to the received chip selection signals; each first network port is used for connecting different communication link end machine equipment. The DSP chip stores a preset link gating priority and sends a chip selection signal to a corresponding first internet access chip according to the link gating priority, so that automatic switching is realized; and sending a chip selection signal to the corresponding first network port chip through the DSP chip according to the level signal of the manual switch, thereby realizing manual switching.
Furthermore, each first network port chip is provided with a link on-off feedback unit connected to the DSP chip; the link on-off feedback unit is used for sending link interruption information to the DSP chip; and the DSP chip is used for sending a chip selection signal to the corresponding first network port chip according to the level signal of the manual change-over switch, the link gating priority of the first network port chip and the fed-back link interruption information.
Further, the multi-link adaptive switching module for unmanned platform measurement and control communication further includes: the second network port and the second network port chip are connected; the second network port is used for connecting an unmanned platform control system; and the second network port chip is connected to the DSP chip.
The multilink self-adaptive switching module of the invention is applied to carry out unmanned platform measurement and control communication, and the working principle is as follows:
an application architecture of the unmanned platform measurement and control communication shown in fig. 2 is established. And a link 1 end machine, a link 2 end machine and a link 3 end machine are respectively arranged at two positions, and the corresponding link end machines are connected to realize a communication link 1, a communication link 2 and a communication link 3. Two positions respectively adopt a multilink self-adaptive switching module; each multilink self-adaptive switching module is connected to a corresponding link terminal machine through a first network port and is connected to the unmanned platform control system through a second network port.
And the unmanned platform control system transmits the service data through the second network port and the gated communication link. Taking the preset link gating priority as communication link 1 > communication link 2 > communication link 3 as an example, after the multilink adaptive switching module is powered on: firstly, the link on-off state of each communication link is fed back to the DSP chip through a link on-off feedback unit of the first internet access chip corresponding to each communication link. Then, sending a chip selection signal to a first network port chip corresponding to each communication link through a preset link gating priority in the DSP chip: if the link on-off state of the communication link 1 is normal, sending a chip selection signal to a first internet access chip corresponding to the communication link 1; if the link on-off state of the communication link 1 is abnormal and the link on-off state of the communication link 2 is normal, sending a chip selection signal to a first internet access chip corresponding to the communication link 2; and if the link on-off states of the communication link 1 and the communication link 2 are abnormal and the link on-off state of the communication link 3 is normal, sending a chip selection signal to a first network port chip corresponding to the communication link 3. And the corresponding first network port chip gates the link end machine connected with the corresponding first network port according to the received chip selection signal to receive and transmit data. The process of the link on-off feedback unit for judging the link on-off state is shown in fig. 3, the link on-off feedback unit periodically sends a heartbeat packet to a link terminal machine connected with the current link, and the heartbeat packet is transmitted to a multilink self-adaptive switching module of an opposite terminal through a communication link; the multilink self-adaptive switching module of the opposite terminal feeds back the heartbeat packet and transmits the heartbeat packet to the local multilink self-adaptive switching module through the link terminal machine; if the local link on-off feedback unit receives the feedback heartbeat packet within the specified time, judging that the current link is connected; if the link on-off feedback unit does not receive the feedback heartbeat packet within the specified time, judging that the current link is off, and sending link interruption information to the DSP chip; the heartbeat packet comprises an MAC frame head, an IP frame head, a UDP packet head and self-defined service data, and the heartbeat packet in the transmission data is extracted and judged by judging the information of the MAC frame head, the IP frame head, the UDP packet head and the like.
For the requirements of emergency communication, system test and the like, a manual change-over switch can be manually adjusted to input a level signal to the DSP chip; and the DSP chip sends a chip selection signal to the corresponding first network port chip according to the input level signal. And the corresponding first network port chip gates the link end machine connected with the corresponding first network port according to the received chip selection signal to receive and transmit data, so that the gating of the communication link is directly and manually controlled. The priority of the manual changeover switch is higher than that of the automatic changeover.
Furthermore, a serial port is designed to be used as a standby access interface of the link end machine. A multilink self-adaptation switches module for unmanned platform observes and controls communication still includes: a serial port transceiver chip and a multi-core connector; and the multi-core connector is connected to the DSP chip through the serial port transceiving chip. Specifically, the serial port transceiver chip comprises an RS232 serial port transceiver chip and an RS422 serial port transceiver chip; the multi-core connector comprises an RS232 interface and an RS422 interface; the RS232 interface is connected to the DSP chip through an RS232 serial port transceiver chip; and the RS422 interface is connected to the DSP chip through an RS422 serial port transceiving chip. Furthermore, the multi-core connector also comprises a JTAG simulation interface connected to the DSP chip, and the JTAG simulation interface is used for debugging the DSP chip and is convenient for later maintenance and improvement.
Furthermore, the multi-link self-adaptive switching module for the unmanned platform measurement and control communication further comprises N link state indicator lamps connected to the DSP chip, and each link state indicator lamp displays the corresponding link on-off state and link gating state, so that a user can conveniently monitor the real-time working state of the communication system. For example, the communication link is normally turned on by the link status indicator lamp, the communication link is abnormal by the link status indicator lamp being turned off, and the communication link is currently gated by the link status indicator lamp being intermittently flashed.
Furthermore, the multi-link self-adaptive switching module for unmanned platform measurement and control communication further comprises a power interface and a power switch which are connected; the power interface is used for being connected with an external power supply to supply power and controlling the on-off of the power supply through the power switch. Further, the multi-link self-adaptive switching module for unmanned platform measurement and control communication further comprises a working state indicator light for indicating the current power supply condition.
The features and properties of the present invention are described in further detail below in conjunction with the specific embodiments:
the multilink self-adaptive switching module for the unmanned platform measurement and control communication comprises a shell and a core circuit board arranged in the shell;
the first network port, the second network port, the multi-core connector, the power interface, the manual change-over switch and the power switch are all arranged on the shell; the manual change-over switch, the power switch, the link status indicator light and the working status indicator light can be arranged on the front panel of the casing, and the first net port, the second net port, the multi-core connector and the power interface are arranged on the rear panel of the casing.
The DSP chip, the network port chip and the serial port receiving and transmitting chip are arranged on the core circuit board, and the core circuit board is provided with a connector so as to be connected with a corresponding interface.
The DSP chip selects TMS320C6455BCTZA, which comprises: 4 EMIFA interfaces, GPIO pins, a serial port expansion interface Peripheral and a RAM memory; the DSP chip stores preset link gating priority in the RAM memory. The RAM memory is a self-contained memory of the DSP chip, and works only after power-on, and data stored in the RAM memory is cleared after power-off, so that the DSP is not required to be in a state of being powered on all the time, as shown in fig. 4, in this embodiment, a storage space with a size of 4Mbit is further set to store link gating priority and some normal working programs required for operation. Specifically, 2 EEPROM memory chips with the model number of AT24CM02-SSHM-T are arranged, are respectively connected with the DSP chip through SCL and SDA pins of a serial port expansion interface Peripheral, and are used for data storage and reading through an I2C bus protocol. In practical use, after the multi-link self-adaptive switching module is powered on, the link gating priority stored by the EEPROM memory chip and some conventional working programs required by operation are transmitted to the RAM memory of the DSP chip.
As shown in fig. 5a, 5b, and 6a, 6b, the DSP chip is respectively connected to 3 first network interface chips and 1 second network interface chip through 4 EMIFA interfaces; the 3 first network port chips are respectively connected with 1 first network port through ETH 1-ETH 3 pins on the first connector J4, the ETH4 pin on the first connector J4 of the 1 second network port chip is connected with 1 second network port, and the sequence of the pins is determined according to actual application. The first network port and the second network port adopt RJ45 network ports. The first network port chip and the second network port chip both adopt W5300 hundred million network port chips. And the link state feedback end of the first network port chip is mainly an LAN _ INT pin and is used for sending link interruption information to the DSP chip.
The GPIO pin of the DSP chip is connected to corresponding pins DSP _ GPIO13, DSP _ GPIO14 and DSP _ GPIO15 of a first connector J4, and then pins corresponding to pins DSP _ GPIO13, DSP _ GPIO14 and DSP _ GPIO15 on the other side of the first connector J4 are connected to a manual change-over switch 1, a manual change-over switch 2 and a manual change-over switch 3 on the shell; and acquiring high and low levels of the manual change-over switch through the DSP chip, so as to output a chip selection signal to the first network port chip.
As shown in fig. 4 and 7a to 7b, the DSP chip is respectively connected to 1 RS232 chip MAX3232EUE and 1 RS422 chip MAX3490ESA through a serial port expansion interface perpheral; the RS232 chip MAX3232EUE and the RS422 chip MAX3490ESA are connected to corresponding pins on the second connector J3, the other side of the second connector J3 is connected to a multi-core connector on the shell, and an RS232 interface, an RS422 interface and a JTAG simulation interface are realized through the multi-core connector.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A multilink self-adaptation switching module for unmanned platform measurement and control communication is characterized by comprising: the device comprises a DSP chip, N first network port chips, N first network ports and N manual change-over switches; each first internet access chip and each manual switch are correspondingly connected to the DSP chip; the manual change-over switch is used for transmitting a level signal to the DSP chip; the DSP chip stores a preset link gating priority and is used for sending a chip selection signal to a corresponding first internet access chip; the first network port chips are connected with the first network ports in a one-to-one correspondence mode and used for gating the corresponding first network ports according to the received chip selection signals; each first network port is used for connecting different communication link end machine equipment.
2. The multi-link adaptive switching module for unmanned platform measurement and control communication according to claim 1, wherein each first portal chip is provided with a link on-off feedback unit connected to a DSP chip; and the link on-off feedback unit is used for sending link interruption information to the DSP chip.
3. The multi-link adaptive switching module for unmanned platform measurement and control communication according to claim 2, wherein the link on-off feedback unit periodically sends heartbeat packets to the link end machine connected to the current link, and the heartbeat packets are transmitted to the multi-link adaptive switching module of the opposite end through the communication link; the multilink self-adaptive switching module of the opposite terminal feeds back the heartbeat packet and transmits the heartbeat packet to the local multilink self-adaptive switching module through the link terminal machine; if the local link on-off feedback unit receives the feedback heartbeat packet within the specified time, judging that the current link is connected; if the link on-off feedback unit does not receive the feedback heartbeat packet within the specified time, judging that the current link is off, and sending link interruption information to the DSP chip; the heartbeat packet comprises a MAC frame head, an IP frame head, a UDP packet head and self-defined service data.
4. The multi-link adaptive handover module for unmanned platform measurement and control communication according to claim 1, further comprising: a serial port transceiver chip and a multi-core connector; and the multi-core connector is connected to the DSP chip through the serial port transceiving chip.
5. The multi-link adaptive switching module for unmanned platform measurement and control communication according to claim 4, wherein the serial port transceiver chip comprises an RS232 serial port transceiver chip and an RS422 serial port transceiver chip; the multi-core connector comprises an RS232 interface and an RS422 interface; the RS232 interface is connected to the DSP chip through an RS232 serial port transceiver chip; and the RS422 interface is connected to the DSP chip through an RS422 serial port transceiving chip.
6. The multi-link adaptive switching module for unmanned platform measurement and control communications according to claim 4, wherein the multi-core connector further comprises a JTAG emulation interface connected to the DSP chip.
7. The multi-link adaptive handover module for unmanned platform measurement and control communication according to claim 1, further comprising: the second network port and the second network port chip are connected; the second network port is used for connecting an unmanned platform control system; and the second network port chip is connected to the DSP chip.
8. The multi-link adaptive switching module for unmanned platform measurement and control communication according to claim 1, further comprising N link status indicator lights connected to the DSP chip, each of the link status indicator lights displaying a corresponding link on-off status and link gating status.
9. The multi-link adaptive switching module for unmanned platform measurement and control communication according to claim 1, further comprising a power interface and a power switch connected; the power interface is used for being connected with an external power supply to supply power and controlling the on-off of the power supply through the power switch.
10. The multi-link adaptive handover module for unmanned platform measurement and control communication according to claim 1, further comprising: and the EEPROM storage chip is connected with the DSP chip.
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| CN112821964B (en) * | 2020-12-22 | 2022-06-21 | 中国电子科技集团公司第五十四研究所 | Monitoring method of unattended scattering communication system |
| CN113114535A (en) * | 2021-04-12 | 2021-07-13 | 北京字跳网络技术有限公司 | Network fault detection method and device and electronic equipment |
| CN113300885B (en) * | 2021-05-21 | 2022-04-26 | 湖南兴天电子科技有限公司 | Network switching equipment and method |
| CN114826966B (en) * | 2022-04-29 | 2024-02-09 | 上海星秒光电科技有限公司 | Time interval measuring instrument and system capable of adaptively selecting physical interface |
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|---|---|---|---|---|
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| CN105848234A (en) * | 2016-03-29 | 2016-08-10 | 乐视控股（北京）有限公司 | Multi-link network switching method, device and system |
| US10033666B2 (en) * | 2016-06-28 | 2018-07-24 | Intel Corporation | Techniques for virtual Ethernet switching of a multi-node fabric |
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