Centralized monitoring system of instrument landing system

Abstract

The invention discloses a centralized monitoring system of an instrument landing system, and relates to the field of monitoring systems of instrument landing systems, and the system comprises a data analysis module, a graphical display module, a log module, a voice broadcast module, a function selection module, a system time service module, a configuration synchronization module, a flight correction module and a database. The problems that the protocol depends on foreign countries and is insufficient in safety are solved through an autonomous and controllable instrument landing system communication protocol; interface graph visualization mainly comprises an airport deployment graph, a host module composition graph and a log data visualization graph, and the problems that an interface is not visual and faults are difficult to position are solved; meanwhile, the configuration parameters are composed of host configuration, transmitter configuration, flight correction configuration and user configuration, the configuration parameters all support export and import, and the problems that at present, configuration data recording lacks a system, and the maintenance cost is high are solved.

Description

Technical Field

[0001] The present invention relates to the field of monitoring systems for instrument landing systems, and more particularly to a centralized monitoring system for an instrument landing system. Background Art

[0002] The instrument landing system consists of a localizer, a glide path beacon and a pointer beacon (which can be replaced by a distance meter DME installed in an appropriate position). It is remotely monitored by a remote control and status display system. The International Civil Aviation Organization (ICAO) divides the instrument landing system into three categories: I, II and III according to runway visibility and decision height. For instrument landing systems operating in Category I or Category II, the localizer should be equipped with a far-field monitor to monitor the channel signal. Among them, the heading beacon radiates two amplitude modulated signals of 90Hz and 150Hz through the heading antenna, forming a heading plane in the vertical plane passing through the extension line of the runway center, and providing the aircraft with lateral guidance signals that deviate from the heading plane; the glide path beacon radiates two amplitude modulated signals of 90Hz and 150Hz through the glide path antenna, forming a glide path on the vertical plane of the extension line of the runway center, and the angle formed by the glide path and the ground is the glide path angle, providing the aircraft with vertical guidance signals that deviate from the glide path; the pointer beacon is emitted into the air in the vertical plane, in a fan-shaped vertical radiation pattern, providing the pilot with the aircraft's altitude information and the distance from the runway entrance (when using DME, DME will continuously indicate the aircraft's slant distance from the runway); the remote control and status display system includes a remote control, a tower repeater display and a long-distance monitoring and maintenance system, which can realize centralized monitoring of the instrument landing system.

[0003] At present, the instrument landing systems mainly used in my country's civil airports are the series products of the Norwegian NORMARC company and the Italian THALES company. Therefore, the existing centralized monitoring methods of instrument landing systems are mainly based on the instrument landing systems developed by foreign companies such as NORMARC or THALES. The centralized monitoring system developed by the original manufacturer's agreement is difficult to adjust according to the specific conditions of the airport, and the inability to achieve complete autonomous control also brings certain safety risks.

[0004] At the same time, the existing centralized monitoring method of the instrument landing system mainly provides the status information of the instrument landing system in the form of a parameter list. However, due to the complex composition of the instrument landing system, when the system is abnormal, a large number of status parameters are displayed in the form of a list, which brings certain difficulties to the timely location of the fault; similarly, when tracing the cause of the historical system abnormality, the non-intuitive historical events and historical data records also require a lot of time to review and organize, which in turn increases the cost of analysis and troubleshooting.

[0005] In addition, during the long-term operation of the instrument landing system, environmental changes or device loss may cause abnormal phenomena such as parameter drift, requiring regular calibration of the instrument landing system and adjustment of equipment parameters. In the monitoring of existing instrument landing systems, the recording of configuration parameters such as calibration is still mainly done manually. When the number of configuration parameters is large, higher requirements are placed on the accuracy of configuration parameter recording, which further affects the effective use of monitoring and transmission configuration data. Summary of the invention

[0006] The object of the present invention is to provide a centralized monitoring system for an instrument landing system to solve the problems existing in the above-mentioned background technology.

[0007] The above technical objectives of the present invention are achieved through the following technical solutions:

[0008] The present application provides a centralized monitoring system for an instrument landing system, comprising:

[0009] A data analysis module is used to analyze the network status information of each device in the instrument landing system through a preset communication protocol, wherein the communication protocol includes the user datagram protocol UDP, the simple network management protocol SNMP and the simple file transfer protocol TFTP;

[0010] A graphical display module is used to display the parsed network status information of each device in the instrument landing system by category;

[0011] The log module is used to record the logs of each device in the instrument landing system during operation, and the logs include event logs and data logs;

[0012] The voice broadcast module is used to continuously alarm when there is an abnormality in the instrument landing system, and is also used to broadcast the data items of each device in the instrument landing system;

[0013] Function selection module, used to select the function of the instrument landing system according to the status of different airports;

[0014] System timing module, used to provide timing for each device in the instrument landing system;

[0015] Configuration synchronization module, used to send corresponding configuration status to each device in the instrument landing system;

[0016] The flight calibration module is used to calibrate the parameters of each device in the instrument landing system;

[0017] The database is used to access the data resources of each module in the centralized monitoring system.

[0018] Based on the above technical solution, the present invention can also be improved as follows.

[0019] Furthermore, the user datagram protocol UDP is used to receive status information and logs of each device in the instrument landing system;

[0020] Simple Network Management Protocol (SNMP) encrypts the configuration parameters of each device based on the SNMP v3 protocol and provides multiple permissions for single-machine login or centralized login of the instrument landing system, including monitor, operator, administrator and maintainer, specifically:

[0021] Monitor: Read only, no parameter configuration permission, no user management permission;

[0022] Operator, read and write, has the authority to configure parameters and change his own password, but does not have the authority to manage other users;

[0023] Administrator, read and write, with parameter configuration authority and user management authority;

[0024] Maintenance operator, read and write, has the authority to configure parameters and monitor manufacturer maintenance data items, but does not have user management authority;

[0025] Trivial File Transfer Protocol (TFTP) is used to query historical logs, including event logs and historical data logs.

[0026] Furthermore, the above-mentioned graphical display module classifies and displays the network status information in the form of a main interface airport deployment diagram, a host module composition diagram and a function mapping column.

[0027] Furthermore, the above-mentioned event-type log includes time information, host information, module information, user information, event details and event level information of each real-time event; the data-type log is used to query historical data of a specified time interval.

[0028] Furthermore, the voice materials in the above-mentioned voice broadcast module include host type, module type, data item type and exception type. When an abnormality occurs in the instrument landing system, the corresponding voice material items are selected and combined respectively, and the abnormal voice obtained after the combination enters the voice broadcast list; when a new abnormality occurs, the new abnormal voice is added to the voice broadcast list in sequence.

[0029] Furthermore, the above function selection module is used to realize host level selection, module level selection and function level selection, wherein:

[0030] The host level options include selecting any one of the marker beacon, DME, far-field monitor, and remote controller in the instrument landing system;

[0031] Module-level selection includes selecting any one of the power module, monitor, local monitoring and maintenance module, main transmitter, backup transmitter, power supply and battery in the instrument landing system;

[0032] Functional level options include the selection of any one of the Network Time Protocol (NTP) timing in the instrument landing system, the monitoring start-up of the far-field monitor and the addition of monitoring decision logic, the heading inhibition descent, the interlock inhibition, and the monitoring launch shutdown inhibition.

[0033] Furthermore, the timing module of the above system includes NTP timing, module periodic timing, and manual timing, wherein:

[0034] When there is an NTP server, configure the corresponding network address to use the NTP server for periodic timing.

[0035] The module periodic timing adopts the system time of the system timing module itself, and sends it to each host in the instrument landing system for synchronization through the network communication cycle;

[0036] Manual timing: When NTP timing and module periodic timing are turned off, manually enter the time of the synchronization host to be synchronized in the instrument landing system.

[0037] Furthermore, the above configuration synchronization module includes the frequency matching capability of the heading beacon and the glide path beacon, transmitter consistency configuration processing, binding configuration of hot standby with MC3 under Category III, synchronization capability of different host users, and configuration import and export system of the instrument landing system.

[0038] Furthermore, the above-mentioned flight calibration module includes DDM monitoring, standard value adjustment and alarm threshold adjustment in the instrument landing system, and is also used to compare the historical flight calibration configuration and the current flight calibration configuration in a tabular form, and to reflect the flight calibration performance trend by drawing a line graph with the data of the historical flight calibration configuration.

[0039] Furthermore, the above-mentioned database includes configuration access and data export when used to access the data resources of each module in the centralized monitoring system; configuration access includes access to any one of configuration files, image resources, and sound resources, and data export includes exporting any one of event-type logs and data-type logs.

[0040] Compared with the prior art, the present invention has at least the following beneficial effects:

[0041] In this application, in order to solve the problem of protocol dependence on foreign countries and insufficient security, this application proposes a completely autonomous and controllable instrument landing system communication protocol, which mainly includes three parts: user datagram protocol UDP multicast status / real-time log, simple network management protocol SNMP encryption configuration and simple file transfer protocol TFTP historical log query. Among them, UDP multicast is used to receive the status information of each device in the system on the one hand, and real-time log on the other hand. The UDP status protocol consists of host identification, number of module domain tags, domain tag, domain tag length and data content; SNMP configuration is based on SNMP v3 protocol to encrypt the configuration parameters on the network. At the same time, the user needs to enter valid account password information before configuring the instrument landing system equipment. The object identifier OID in the SNMP configuration protocol consists of fixed node, host node, module node and data item node; TFTP query is used to query historical log files, including event log and data log. The TFTP log protocol consists of host identification, time identification, number of module domain tags, domain tag, domain tag length, data content and 6-bit cyclic redundancy check CRC-16. The time identification is controlled by the system timing module to control the time consistency of the entire system. Different protocols are processed in independent threads and can be flexibly expanded according to different domain tag designs. While autonomously controlling the protocol, network encryption of configuration parameters through the SNMP v3 protocol can effectively improve the security of the instrument landing system.

[0042] In this application, in order to solve the problems of unintuitive interface and difficult fault location, the interface graphic visualization of this application mainly includes airport deployment diagram, host module composition diagram, and log data visualization diagram; among them, the airport deployment diagram provides a physical view of the airport instrument landing system deployment on the main interface based on longitude and latitude. After the system installation is completed, the user enters the location information of the heading beacon, glide path beacon, pointing beacon (or DME), remote control and status display system, and further involves the heading antenna array spacing, heading / glide path near-field antenna position, glide path reflection site longitudinal slope FSL value, far-field monitor position, etc. After completing the position information input, the main interface will adjust the relative position relationship between the equipment according to the longitude and latitude and the current scale, and intuitively display the airport deployment status of each instrument landing system equipment. At the same time, it also supports map zooming and distance line drawing, and graphically displays the pre-installed position of the equipment through longitude and latitude calculation, which provides convenience for the deployment and adjustment of the airport's instrument landing system; the host module composition diagram provides information about each module in the host in a graphical way, and the composition of the module is mapped one by one with the actual object, specifically involving power modules, monitors, local monitoring and maintenance modules, course transmitters, clearance transmitters, power supplies and batteries. Selecting the corresponding module will display the corresponding status and configuration data items. When the system is abnormal, the overall system abnormality will pop up and flash, and the abnormal module and specific abnormal data items will change color, warnings are yellow, faults are red, and other normal modules are green, and voice broadcasts are performed at the data item level. At the same time, separate fault mappings are provided for local front panels, monitoring, transmission, identification codes, and communications, which can quickly locate the main category of the fault. In addition, module composition, emission suppression, and far-field monitors are optional. Depending on the specific conditions of the airport, false alarm interference can be avoided. The log data visualization diagram can query historical logs within a specified time range and support filtering of log types to facilitate accurate positioning of fault intervals. There are two types of logs: event-type logs and data-type logs. Event-type logs provide statistics of abnormal modules, and data-type logs provide line drawings of monitoring and emission historical data to facilitate data analysis and troubleshooting.

[0043] In this application, in order to solve the problems of lack of system for configuration data recording and high maintenance cost, the configuration parameters in this solution are composed of host configuration, transmitter configuration, calibration configuration and user configuration, and all configuration parameters support export and import; among them, the host configuration records all configuration parameters of each host in the instrument landing system, which is convenient for the overall transfer of configuration data at the host level, and the newly installed host corresponding to the similar airport situation can be quickly fine-tuned based on the debugged host configuration; the transmitter configuration is used to record transmitter-related parameters. On the one hand, it is used to record the configuration of different frequencies of a single set of transmitters, and on the other hand, it is used to record the configuration of designated frequencies of different transmitters, aiming to conveniently control the consistency of transmitters; the calibration configuration is used to record the calibration data of regular calibration of the instrument landing system. On the one hand, it can quickly apply the configuration parameters of the last successful calibration in the new calibration to achieve rapid calibration, and on the other hand, it is also convenient for maintenance personnel to analyze long-term calibration data; the user configuration can classify and manage all configuration information in the form of user names for multiple maintenance personnel, and provide user preference configuration storage for personnel for different reasons such as environmental factors, testing or research. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0045] Figure 1 A connection block diagram of a centralized monitoring system in an embodiment of the present invention;

[0046] Figure 2 It is a schematic diagram of the User Datagram Protocol UDP in an embodiment of the present invention;

[0047] Figure 3 A schematic diagram of the Simple Network Management Protocol (SNMP) in an embodiment of the present invention;

[0048] Figure 4 A schematic diagram of a simple file transfer protocol TFTP in an embodiment of the present invention;

[0049] Figure 5 A schematic diagram of a data processing architecture in an embodiment of the present invention;

[0050] Figure 6 This is a composition diagram of a localizer host module according to an embodiment of the present invention;

[0051] Figure 7 This is a schematic diagram of abnormal statistics of historical logs of event-type logs in an embodiment of the present invention;

[0052] Figure 8 Schematic diagram of visualization of historical data of a data-type log in an embodiment of the present invention. DETAILED DESCRIPTION

[0053] In order to make the purpose, 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 in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0054] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0055] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0056] In the description of the embodiments of the present invention, "plurality" means at least 2.

[0057] Example:

[0058] In order to solve the problems of the current centralized monitoring system for instrument landing systems, such as reliance on foreign protocols, insufficient security, non-intuitive interface, difficult fault location, lack of system for configuration data recording, and high maintenance cost, this embodiment provides a centralized monitoring system for instrument landing systems, such as Figure 1 As shown, Figure 1 The overall block diagram of the centralized monitoring system is used to describe the cross-linking relationship between the various parts of the present invention and the overall functional composition; it may include:

[0059] The data parsing module is used to parse the network status information of each device in the instrument landing system through a preset communication protocol. The communication protocol includes the user datagram protocol UDP, the simple network management protocol SNMP and the simple file transfer protocol TFTP.

[0060] The above-mentioned instrument landing system is composed of a localizer, a glide beacon, a pointing beacon (or DME), a remote control and a status display system. The localizer is composed of a localizer host, a localizer antenna array, a localizer near-field monitoring NF antenna, a far-field monitor, a far-field monitoring channel CL antenna, and a far-field monitoring channel width DS antenna; the glide beacon is composed of a glide beacon host, a glide M array antenna, and a glide near-field monitoring NF antenna; the pointing beacon is composed of a pointing beacon host and a pointing beacon antenna; the remote control and status display system is composed of a remote controller, a long-distance monitoring and maintenance system, and a tower repeated display. This embodiment performs centralized monitoring of all equipment in the instrument landing system based on the long-distance monitoring and maintenance system.

[0061] The data analysis module is used to analyze the network information of each device in the instrument landing system. This embodiment designs a completely autonomous and controllable instrument landing system communication protocol, which mainly includes three parts: user datagram protocol UDP multicast status / real-time log, simple network management protocol SNMP encryption configuration and simple file transfer protocol TFTP historical log query; specifically:

[0062] UDP multicast is used to receive status information of each device in the system and real-time logs. The UDP status protocol consists of host identification, number of module domain tags, domain tags, domain tag length and data content. Figure 2 , Figure 2 It is a UDP status protocol in a centralized monitoring system, used to receive status information of each host in an instrument landing system. The host identifier is used to distinguish different hosts in an instrument landing system, and occupies 1 byte. The number of module domain tags refers to the number of modules in this message, and occupies 1 byte. It supports expansion to 255 modules at most. The domain tag is variable length and changes according to the number of module domain tags, starting from the high bit. Each bit is 1 to indicate that the module exists, and 0 to indicate that the module does not exist. The domain tag length is variable length and changes according to the number of module domain tags, and refers to the length of the module data content. The data content is parsed according to the module status parameters based on the domain tag, domain tag length, and custom protocol.

[0063] SNMP configuration performs network encryption on configuration parameters based on SNMP v3 protocol. The present invention provides four rights for logging into the instrument landing system, supporting single machine login and centralized login. The four rights are monitor, operator, administrator and maintainer, as follows:

[0064] Monitor: Read only, no parameter configuration function, no user management function;

[0065] Operator: can read and write, has parameter configuration function, does not have the function of user management of other users, can only change their own password;

[0066] Administrator: can read and write, has parameter configuration function, and has user management function;

[0067] Maintenance operator: can read and write, has parameter configuration function, does not have user management function, and enables manufacturer maintenance data item monitoring.

[0068] The object identifier OID in the SNMP configuration protocol consists of fixed nodes, host nodes, module nodes, and data item nodes. For details, refer to Figure 3 , Figure 3 It is composed of SNMP configuration OID in the centralized monitoring system, and is used to encrypt the configuration of the instrument landing system. Among them, the fixed node refers to the applied enterprise node; the host node refers to each host in the instrument landing system; the module node refers to each module in the host; the data item node refers to the specific data content corresponding to the module.

[0069] TFTP query is used to query historical log files, including event logs and data logs. The TFTP log protocol consists of host ID, time ID, number of module domain tags, domain tag, domain tag length, data content, and 6-bit cyclic redundancy check CRC-16. Figure 4 , Figure 4 It is a TFTP log query protocol in a centralized monitoring system. It is used to query the logs of each host in the instrument landing system. The time stamp is controlled by the system timing module to ensure the time consistency of the entire system. Compared with the UDP status protocol, the added 8-byte time stamp is used to uniquely identify the event to ensure that the event occurs in an orderly manner. In addition, the added CRC-16 check is to ensure the integrity of each event in the log file.

[0070] Specifically, this embodiment designs an independent SNMP subprocess for each host login in the instrument landing system to perform configuration data encryption processing, and different types of status protocols are also processed in independent subthreads. Figure 5 , Figure 5 It is the data processing architecture of the centralized monitoring system, which is used to describe the process and thread usage of the present invention. It mainly includes UDP status communication sub-thread, UDP real-time log update sub-thread, historical log automatic update sub-thread, UDP network address update sub-thread, TFTP communication sub-thread, event-type log history file parsing and export sub-thread, data-type log history file parsing and export sub-thread, while the main thread in the main process concentrates on processing the user interaction interface UI.

[0071] Optionally, the centralized monitoring system may further include: a graphical display module for classifying and displaying the parsed network status information of each device in the instrument landing system.

[0072] The above-mentioned graphical display module displays the status information by category. The graphical display module of this embodiment mainly includes the airport deployment diagram of the main interface, the host module composition diagram, and the function mapping column; the specific implementation example refers to Figure 6 , Figure 6 This is an example of the module composition of the localizer host. Two power modules, three monitors, one local monitoring and maintenance module, two channel transmitters, two clearance transmitters, two power supplies and batteries are displayed in a module graphical manner. The specific contents are as follows:

[0073] The airport deployment diagram provides a physical view of the airport instrument landing system deployment on the main interface based on longitude and latitude. Before installing the instrument landing system, import the pre-drawn airport runway schematic diagram, and then drag the localizer host and glide beacon host provided by the airport deployment function to the approximate position in the airport deployment diagram on the main interface. Based on the runway use distance line drawing function, it can intuitively simulate the installation position of equipment such as localizer and glide beacon. After completing the debugging and installation of the instrument landing system in combination with the airport field measurement, the user enters the location information of the localizer, glide beacon, pointer beacon (or DME), remote control and status display system in the airport deployment diagram on the main interface, further involving the spacing of the heading antenna array, the position of the heading / glide near-field antenna, the longitudinal slope FSL value of the glide reflection site, the position of the far-field monitor, etc. After completing the position information input, the main interface will adjust the relative position relationship between the equipment according to the longitude and latitude and the current scale, intuitively displaying the airport deployment of each device of the instrument landing system, and the input position parameters are displayed or hidden in the form of distance lines, providing intuitive data reference for the possible impact of subsequent changes in the terrain environment of the airport. At the same time, the airport deployment map also supports the map zoom function. When the system is abnormal, the corresponding abnormal host in the deployment map of the main interface will be highlighted, the warning will be yellow, the fault will be red, and a pop-up window will flash indicating the system abnormality.

[0074] The host module composition diagram provides information about each module in the host in a graphical way. The composition of the module is mapped one by one to the physical object, specifically involving the power module, monitor, local monitoring and maintenance module, main transmitter, backup transmitter, power supply and battery. Selecting the corresponding module will display the corresponding module parameters. Further selecting the status parameter or configuration parameter page can realize data item-level status monitoring and module configuration. Among them, the module parameters of the transmitter put the channel and clearance together, which can more intuitively and completely grasp the configuration of a set of transmitters. When the system is abnormal, the abnormal module and the specific abnormal data item will change color, with warnings in yellow, faults in red, and other normal modules in green. In addition, the monitoring decision logic of the monitor and the transmitter's transmission standby mode are given above the host module composition diagram, which can intuitively grasp the comprehensive configuration of the current host monitoring and transmission.

[0075] The function mapping bar mainly includes the toolbar, status bar and custom information prompts. The toolbar provides login, user management, front panel, monitoring, transmission, identification code, alarm delay, flight calibration, data, log, communication, configuration file, system timing, and about functions. Among them, login provides an interface for user switching; user management provides functions for user query, addition, modification and deletion; the front panel is a mapping of the front panel of the local monitoring and maintenance module of the instrument landing system; monitoring summarizes and displays the air monitoring signals, and the adjusted monitoring thresholds can be applied to different monitors; transmission displays the main transmitter and the backup transmitter on the same screen, and highlights the transmitter facing the air; the identification code is used for the sending configuration, mode configuration and content configuration of the heading beacon; the alarm delay supports Class I, II and III alarm delays, and the monitor, near field and identification code alarm delays can be set to different times, and the integrity check duration is not distinguished by category; calibration flight is a convenient function designed specifically for regular calibration flight of the instrument landing system; data refers to the related operations on data-type logs; logs refer to the related operations on event-type logs; communication is used to describe the current network connection status; the configuration file provides configuration import and export; the system timing is intended to unify the time of the instrument landing system; about is the version information of each device of the instrument landing system. At the same time, the local front panel, monitoring, transmission, identification code, and communication can be mapped separately to achieve the purpose of quickly locating the main category of the fault. The status bar provides access rights, current login information, service mode status, and system time display functions. The user can select the instrument landing system data items that he wants to stay on the main interface, such as operation category, station name, interlock status, transmission lock status, etc., so that users can get the data item values ​​that they are most concerned about in the first place.

[0076] Optionally, the centralized monitoring system may further include: a log module for recording logs of various devices in the instrument landing system during operation, wherein the logs include event-type logs and data-type logs.

[0077] The above-mentioned log module will record the events and data that occur during the operation of the device. The log module includes two types: event log and data log; see Figure 7 and Figure 8 , as follows:

[0078] Event logs are divided into real-time logs and historical logs. Figure 7 , Figure 7For the historical log anomaly statistics of event-type logs, the abnormal conditions of different modules are intuitively quantified in the form of stacked bar charts and tables: the real-time log receives real-time events of all hosts in the instrument landing system in real time. Events include time, host, module, user, event and event level. Real-time events are recorded in the order of occurrence, even if the system timing is changed. When the system is abnormal, events with warning and fault event levels will be accumulated in the table for the corresponding host or module, and the sum of the two will be calculated. Real-time logs can be exported, and real-time logs that have been exported or analyzed can be cleared and displayed; historical logs can query historical logs within a specified time range, support filtering of log types, and facilitate accurate positioning of fault intervals. The filtering conditions are divided into two levels: module name and event category. Module names include system, local monitoring and maintenance module, monitor MC1, monitor MC2, monitor MC3, channel transmitter TX1-COU, clearance transmitter TX1-CLR, channel transmitter TX2-COU, clearance transmitter TX2-CLR, power module PS1, power module PS2, power supply and battery AC-DC1, power supply and battery AC-DC2. Event categories include manual operation, automatic operation, warning status, fault status, recovery to normal, user event, and integrity. When an event meets the two-level filtering conditions, it can be filtered out. Among them, the warning status and fault status can be used to perform abnormal statistics of the module.

[0079] Data logs can query historical data within a specified time range; see Figure 8 , Figure 8 To visualize the historical data of data-type logs, the trend of changes in key monitoring and transmission parameters is drawn in the form of a broken line. Under the authority of the maintainer, the historical data includes the status data items of all hosts, and the remaining authorities only include the modulation difference DDM, modulation and SDM, and power RF-LEVEL of the three monitors, including the carrier CSB power, sideband SBO power, carrier CSB phase, and sideband SBO phase of the four transmitters. At the same time, the monitoring and transmission parameters support the broken line drawing function, and the drawing objects include the monitor channel CL signal, channel width DS signal, clearance CLR signal, near-field NF signal, including the transmitter channel COU and clearance CLR. The drawing function supports filtering and scaling, and the local situation of the specified data item can be obtained while grasping the overall data trend.

[0080] Optionally, the centralized monitoring system may further include: a voice broadcast module, which is used to issue a continuous alarm when an abnormality occurs in the instrument landing system, and is also used to broadcast data items of each device in the instrument landing system.

[0081] Among them, when the system is abnormal, the voice broadcast module will continuously sound a single alarm sound in a loop, and on the other hand, it will make voice broadcasts based on the data items of the specific host and specific module. The voice broadcast module divides the voice materials into four types: host, module, data item, and abnormal type. When an abnormality occurs, the corresponding items of the four types are selected and combined. The combined abnormal voice will enter the voice broadcast list, and new abnormalities will be added to the voice broadcast list in sequence. The voice broadcast itself is cyclic. When the system returns to normal, the voice broadcast clears the voice broadcast list and stops immediately. In addition, the user is supported to mute the voice during the voice broadcast process.

[0082] Optionally, the above-mentioned centralized monitoring system may further include: a function selection module for selecting functions of the instrument landing system according to the status of different airports.

[0083] Among them, the function option module includes three capabilities: host level option, module level option, and function level option. It can adjust the functions according to the conditions of different airports and has strong versatility. The details are as follows:

[0084] The host level options include the marker beacon, DME, far-field monitor, and remote controller. The marker beacon can be further equipped with the inner marker beacon, middle marker beacon, and outer marker beacon. When there is no remote controller, the function option module provides a graphical function mapping of the remote controller, which can replace the remote controller to receive the status of the entire instrument landing system and send the configuration.

[0085] The module-level options include power modules, monitors, local monitoring and maintenance modules, main transmitters, backup transmitters, power supplies and batteries. The power modules include PS1 and PS2; the monitors include MC1, MC2 and MC3; the transmitters include TX1-COU, TX1-CLR, TX2-COU, TX2-CLR; the power supplies and batteries include AC-DC1 and AC-DC2.

[0086] Functional level options include network time protocol NTP timing, remote monitor monitoring start and monitoring decision logic, heading suppression descent, interlock suppression, and monitoring transmission shutdown suppression. When the remote monitor is turned on, the monitoring function will increase the air monitoring signal parsed by the remote monitor. At the same time, the monitoring status and communication judgment logic will be added. The function displays the remote monitor version information. When the remote monitor adds monitoring decision logic, the abnormal signal in the remote field will cause the transmitter to switch and shut down after the remote alarm delay is reached.

[0087] Optionally, the above-mentioned centralized monitoring system may further include: a system timing module, which is used to provide timing for each device in the instrument landing system.

[0088] Among them, the system timing module is used to maintain the consistency of the whole system time. The system timing module includes three schemes: NTP timing, module periodic timing, and manual timing; the specific contents are as follows:

[0089] NTP timing can be configured with the corresponding network address to use the NTP server for periodic timing when there is an NTP server.

[0090] The module periodic timing adopts the system time of the system timing module itself, which is sent to each host in the instrument landing system through the network communication cycle for synchronization.

[0091] Manual timing is when NTP timing and module periodic timing are turned off, and the time that you want to synchronize the various hosts in the instrument landing system is manually entered, and then the internal clock of each host moves forward on its own.

[0092] Optionally, the above-mentioned centralized monitoring system may further include: a configuration synchronization module, which is used to send corresponding configuration status to each device in the instrument landing system.

[0093] Among them, the configuration synchronization module will provide linkage options while issuing the configuration, mainly including the matching capability of the heading beacon and the glide path beacon frequency, transmitter consistency configuration processing, hot standby binding configuration with MC3 under Category III, synchronization capability of different host users, and configuration import / export system of the instrument landing system. Among them, transmitter consistency is used to record transmitter-related parameters. On the one hand, it is used to record the configuration of 40 frequencies of a single transmitter, and on the other hand, it is used to record the configuration of the specified frequencies of different transmitters, aiming to conveniently control the consistency of the transmitter; the synchronization capability of different host users is when the user logs in with administrator or higher authority, query the existing user information of all hosts, fill in the user synchronization table in sequence without duplication, and then configure the user synchronization table to each host separately. When there are the same user names, the users of the original host are retained; in the configuration import / export system of the instrument landing system, the configuration parameters are composed of host configuration, transmitter configuration, calibration configuration, and user configuration. Configuration parameters support export and import. When selecting a configuration file, you can see the corresponding value of each configuration item in the configuration file. Among them, the host configuration records all the configuration parameters of each host in the instrument landing system, which is convenient for the overall transfer of configuration data at the host level. The newly installed host corresponding to similar airport conditions can be quickly fine-tuned based on the already debugged host configuration; the user configuration is aimed at the situation of multiple maintenance personnel, and all configuration information can be classified and managed in the form of user names, providing user preference configuration storage for personnel for different reasons such as environmental factors, testing or research.

[0094] Optionally, the above-mentioned centralized monitoring system may further include: a flight calibration module for calibrating parameters of various devices in the instrument landing system.

[0095] Among them, the calibration module provides more convenient operation for the regular calibration of the system. The calibration module is mainly for the localizer and the glide path beacon. The glide path beacon lacks the CLR-SBO signal compared to the localizer. The calibration module mainly includes three parts: DDM monitoring, standard value adjustment and alarm threshold adjustment. DDM monitoring provides a graphical interface to display the CL, DS, CLR, and NF signal values ​​of different monitors in real time. The signal quality can be intuitively known by the position of the signal in the green, yellow, and red strip intervals. At the same time, it provides the monitoring threshold adjustment of the limit setting mapping monitoring function to realize the immediate effect of the calibration alarm threshold; the standard value adjustment and the alarm threshold adjustment give the calibration parameter adjustment content in the form of calibration subjects such as channel straightening and channel width, reducing unnecessary parameter interference. At the same time, in order to avoid user misoperation, restrictions are added to the opening and configuration of the calibration flight. To open the calibration flight, the transmitter needs to be facing the air and the channel COU is turned on. To configure the standard value adjustment, all options in the alarm threshold adjustment need to be turned off. The range of user input values ​​is also clearly limited to upper and lower limits. In addition, the previous flight calibration configuration and the current flight calibration configuration can be compared in the flight calibration module in a table format. The historical flight calibration configuration data also provides a line graph to reflect the flight calibration performance trend, making it easier for maintenance personnel to use the flight calibration data more intuitively.

[0096] Optionally, the above-mentioned centralized monitoring system may further include: a database for accessing data resources of each module in the centralized monitoring system.

[0097] Among them, the database is used to access the data resources used by each functional module. The database is mainly divided into two parts: configuration access and data export. Configuration access involves configuration files, image resources, and sound resources; data export is for event logs and data logs obtained by querying each host. Among them, the configuration file is used to access the configuration files of each host of the instrument landing system. When there is no configuration file, the system built-in default value is loaded; image resources refer to airport maps, deployment of instrument landing system components, etc.; sound resources are voice broadcast audio files when the system is abnormal; event logs and data logs are exported in CSV format.

[0098] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A centralized monitoring system for an instrument landing system, characterized in that: include: A data parsing module, used to parse the network status information of each device in the instrument landing system through a preset communication protocol, wherein the communication protocol includes a user datagram protocol UDP, a simple network management protocol SNMP, and a simple file transfer protocol TFTP; A graphical display module is used to display the parsed network status information of each device in the instrument landing system by category; The log module is used to record the logs of each device in the instrument landing system during operation, and the logs include event logs and data logs; The voice broadcast module is used to continuously alarm when there is an abnormality in the instrument landing system, and is also used to broadcast the data items of each device in the instrument landing system; Function selection module, used to select the function of the instrument landing system according to the status of different airports; System timing module, used to provide timing for each device in the instrument landing system; Configuration synchronization module, used to send corresponding configuration status to each device in the instrument landing system; The flight calibration module is used to calibrate the parameters of each device in the instrument landing system; The database is used to access the data resources of each module in the centralized monitoring system.

2. The centralized monitoring system for an instrument landing system according to claim 1, characterized in that: The user datagram protocol UDP is used to receive status information and logs of each device in the instrument landing system; The Simple Network Management Protocol (SNMP) performs network encryption on the configuration parameters of each device based on the SNMP v3 protocol, and provides multiple permissions for single-machine login or centralized login of the instrument landing system, including monitor, operator, administrator and maintainer, specifically: Monitor: Read only, no parameter configuration permission, no user management permission; Operator, read and write, has the authority to configure parameters and change his own password, but does not have the authority to manage other users; Administrator, read and write, with parameter configuration authority and user management authority; Maintenance operator, read and write, has the authority to configure parameters and monitor manufacturer maintenance data items, but does not have user management authority; The simple file transfer protocol TFTP is used to query historical logs including event logs and historical data logs.

3. The centralized monitoring system for an instrument landing system according to claim 1, characterized in that: The graphical display module categorizes and displays the network status information in the form of a main interface airport deployment diagram, a host module composition diagram, and a function mapping column.

4. The centralized monitoring system for an instrument landing system according to claim 1, characterized in that: The event-type log includes the time information, host information, module information, user information, event details and event level information of each real-time event; the data-type log is used to query historical data of a specified time interval.

5. The centralized monitoring system for an instrument landing system according to claim 1, characterized in that: The voice materials in the voice broadcast module include host type, module type, data item type and exception type. When an abnormality occurs in the instrument landing system, the corresponding voice material items are selected and combined, and the abnormal voice obtained after the combination enters the voice broadcast list; when a new abnormality occurs, the new abnormal voice is added to the voice broadcast list in sequence.

6. The centralized monitoring system for an instrument landing system according to claim 1, characterized in that: The function selection module is used to realize host level selection, module level selection, and function level selection, wherein: The host-level selection includes selecting any one of the marker beacon, DME, far-field monitor, and remote controller in the instrument landing system; The module-level selection includes selecting any one of the power module, monitor, local monitoring and maintenance module, main transmitter, backup transmitter, power supply and battery in the instrument landing system; The functional level selection includes selecting any one of the Network Time Protocol NTP timing in the instrument landing system, the monitoring start-up of the far-field monitor and the addition of the monitoring decision logic, the heading inhibition descent, the interlock inhibition, and the monitoring launch shutdown inhibition.

7. The centralized monitoring system for an instrument landing system according to claim 1, characterized in that: The system timing module includes NTP timing, module periodic timing, and manual timing, among which: When there is an NTP server, the NTP timing is configured with a corresponding network address to use the NTP server for periodic timing; The module periodic timing adopts the system time of the system timing module itself, and is sent to each host in the instrument landing system through the network communication period for synchronization; The manual timing is performed by manually inputting the time of the synchronization host to be synchronized in the instrument landing system when the NTP timing and the module periodic timing are turned off.

8. The centralized monitoring system for an instrument landing system according to claim 1, characterized in that: The configuration synchronization module includes the frequency matching capability of the localizer beacon and the glide path beacon, transmitter consistency configuration processing, hot standby binding configuration with MC3 under Category III, synchronization capability of different host users, and configuration import and export system of the instrument landing system.

9. The centralized monitoring system for an instrument landing system according to claim 1, characterized in that: The calibration flight module includes DDM monitoring, standard value adjustment and alarm threshold adjustment in the instrument landing system, and is also used to compare the historical calibration flight configuration and the current calibration flight configuration in the form of a table, and to reflect the calibration flight performance trend by drawing a line graph with the data of the historical calibration flight configuration.

10. The centralized monitoring system for an instrument landing system according to claim 1, characterized in that: The database includes configuration access and data export when used to access the data resources of each module in the centralized monitoring system; the configuration access includes access to any one of configuration files, image resources, and sound resources, and the data export includes exporting any one of event-type logs and data-type logs.

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