Axle counting system and method based on secure communication interface

Abstract

The invention provides an axle counting system and method based on a secure communication interface. The axle counting system comprises an axle counting sensor, an axle counting assembly and a communication assembly. The axle counting sensor generates a wheel current signal and sends the wheel current signal to the axle counting assembly; the axle counting assembly carries out redundancy identification to obtain a first home station axle number and a second home station axle number, receives an adjacent station axle number and carries out redundancy judgment on section states to obtain first section state information and second section state information; and the communication component performs security verification based on the first section state information and the second section state information, performs security coding to obtain a data packet if the verification is passed, and sends the data packet to the interlocking system through the security communication interface. In the scheme, a communication interface with an interlocking system is replaced by a safety communication interface from a relay interface, a large number of relays including track relays, inter-station zero resetting relays and other track condition relays are replaced, various kinds of information can be output, regular maintenance of the relays is reduced, and a large amount of equipment cost and construction cost are saved.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to an axle counting system and method based on a secure communication interface. Background Art

[0002] The axle counting device is a basic positioning device for trains. It can detect the wheels of trains through sensors deployed on the track, and determine the idle state of the section after calculation by the axle counting host. In the automatic station-to-station blocking system of a single-line railway section, the station-to-station axle counting and superposition of semi-automatic blocking (64D or 64F) circuits are usually used to automatically form the station-to-station blocking state through the establishment of the departure route. It is widely used in national and local single-track railways. The station-to-station axle counting device indicates whether the section is occupied by a train by controlling the relay. The interlocking system or 64D and other equipment obtain the section status information output by the axle counting by collecting the relay nodes.

[0003] In the traditional station-to-station axle counting system, sensors and processing modules are arranged outdoors, and the processed information is transmitted to the indoor axle counting unit via cables. After the axle counting unit determines the section status information, it transmits the section status information to the interlocking system or 64D equipment via the railway safety relay. However, the relay is expensive, requires regular maintenance, and has limited output information. Summary of the invention

[0004] In view of this, an embodiment of the present invention provides an axle counting system and method based on a secure communication interface to achieve the purpose of outputting a variety of information, reducing the regular maintenance of relays, and saving a lot of equipment costs and construction costs.

[0005] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0006] A first aspect of an embodiment of the present invention discloses an axle counting system based on a safety communication interface, the system comprising: an axle counting sensor, an axle counting component with a redundant mechanism, and a communication component;

[0007] The axle counting sensor is connected to the axle counting assembly, the axle counting assembly is connected to the communication assembly via a redundant CAN bus, the axle counting assembly is connected to the axle counting assembly of an adjacent station via an inter-station redundant communication channel, and the communication assembly is connected to the interlocking system via a safety communication interface;

[0008] The axle counter sensor is used to generate a wheel current signal when detecting a passing train wheel, and send the current signal to the axle counter assembly;

[0009] The axle counting component is used to perform redundant identification based on the wheel current signal to obtain a first axle number of the local station and a second axle number of the local station; receive the axle number of the adjacent station sent by the axle counting component of the adjacent station; perform redundant judgment of the section status based on the first axle number of the local station and the second axle number of the local station and the axle number of the adjacent station to obtain first section status information and second section status information; send the first section status information and the second section status information to the communication component;

[0010] The communication component is used to perform a safety check based on the first section status information and the second section status information. If the check passes, the first section status information and the second section status information are securely encoded to obtain a data packet; and the data packet is sent to the interlocking system through the safety communication interface.

[0011] Preferably, the axle counting assembly comprises: an axle counting signal processing board, a first axle number identification module, a second axle number identification module, a first state judgment module, a second state judgment module and an inter-station communication module;

[0012] The axle counter signal processing board is used to convert the wheel current signal into a level digital signal, and send the level digital signal to the first axle number identification module and the second axle number identification module respectively;

[0013] The first axis number recognition module is used to obtain a first local axis number based on the level digital signal recognition, and send the first local axis number to the first state judgment module;

[0014] The second axis number recognition module is used to obtain a second local axis number based on the level digital signal recognition, and send the second local axis number to the second state judgment module;

[0015] The inter-station communication module is used to receive the axle number of the adjacent station sent by the axle counting component of the adjacent station, and send the axle number of the adjacent station to the first state judgment module and the second state judgment module; if the axle number of the first local station is consistent with the axle number of the second local station, the axle number of the first local station or the axle number of the second local station is sent as the axle number of the adjacent station to the axle counting component of the adjacent station;

[0016] The first status judgment module is used to send the first local station axis number to the inter-station communication module; judge whether the adjacent station axis number is consistent with the first local station axis number, if consistent, obtain the first segment status information indicating that the segment is idle; if inconsistent, obtain the first segment status information indicating that the segment is occupied; send the first segment status information to the communication component;

[0017] The second status judgment module is used to send the second station axis number to the inter-station communication module; judge whether the adjacent station axis number and the second station axis number are consistent, if they are consistent, obtain the second segment status information indicating that the segment is idle; if they are inconsistent, obtain the second segment status information indicating that the segment is occupied; send the second segment status information to the communication component.

[0018] Preferably, the axle counter assembly further comprises: a fault monitoring module;

[0019] The fault monitoring module is used to receive fault information sent by the first state judgment module and the second state judgment module when faults occur, and output the fault information through a monitoring interface.

[0020] Preferably, the inter-station communication module is specifically used for:

[0021] By using multiple redundantly configured inter-station communication boards, the axle numbers of the adjacent stations sent by the axle counting components of the adjacent stations are received respectively, and the axle numbers of the adjacent stations are sent to the first status judgment module and the second status judgment module; if the axle number of the first station is consistent with the axle number of the second station, the first axle number of the local station or the second axle number of the local station is sent as the axle number of the adjacent station to the axle counting components of the adjacent stations respectively by using the multiple redundantly configured inter-station communication boards.

[0022] Preferably, the inter-station communication module is further used for:

[0023] Using multiple redundantly configured inter-station communication boards, the number of axes of the neighboring station, the number of axes of the first local station, and the number of axes of the second local station are displayed.

[0024] Preferably, the communication component is also used for:

[0025] Receive an interlock reset command sent by the interlock system, and forward the interlock reset command to the first state judgment module and the second state judgment module, so that the first state judgment module and the second state judgment module perform a reset operation.

[0026] Preferably, the communication component comprises: a first communication component and a second communication component connected to each other, wherein the first communication component and the second communication component are respectively connected to the interlocking system through corresponding safety communication interfaces;

[0027] The first series communication component is used to perform dual-system discrimination based on the first section status information and the second section status information received by the second series communication component, and if the dual-system discrimination is passed, the first section status information and the second section status information received by the first series communication component are securely encoded to obtain a first data packet; and the first data packet is sent to the interlocking system through the security communication interface corresponding to the first series communication component;

[0028] The second-system communication component is used to perform dual-system discrimination based on the first section status information and the second section status information received by the first-system communication component and the first section status information and the second section status information received by the first-system communication component. If the dual-system discrimination is passed, the first section status information and the second section status information received by the second-system communication component are securely encoded to obtain a second data packet; and the second data packet is sent to the interlocking system through the security communication interface corresponding to the second-system communication component.

[0029] Preferably, the system further comprises: an isolation ACDC module;

[0030] The isolated ACDC module is respectively connected to the external power supply interface of the AC220V power supply, the power supply input interface of the axle counting component and the power supply input interface of the communication component;

[0031] The isolated ACDC module is used to process the AC220V power input from the external power interface and output isolated DC24V power to the axle counting component and the communication component respectively.

[0032] Preferably, the axle counter sensor is installed on the rail, and two induction coils are arranged inside the axle counter sensor. The axle counter sensor is specifically used for:

[0033] When a train wheel passes by, a wheel current signal is generated by electromagnetic detection, and the current signal is sent to the axle counting assembly.

[0034] A second aspect of an embodiment of the present invention discloses an axle counting method based on a secure communication interface, which is applied to any axle counting system based on a secure communication interface described in any one of the first aspects of an embodiment of the present invention, and the method comprises:

[0035] When the axle counter sensor detects a passing train wheel, a wheel current signal is generated and the current signal is sent to the axle counter assembly;

[0036] The axle counting component performs redundant identification based on the wheel current signal to obtain a first axle number of the local station and a second axle number of the local station; receives the axle number of the adjacent station sent by the axle counting component of the adjacent station; performs redundant judgment of the section status based on the first axle number of the local station, the second axle number of the local station, and the axle number of the adjacent station to obtain first section status information and second section status information; sends the first section status information and the second section status information to the communication component;

[0037] The communication component performs a safety check based on the first section status information and the second section status information. If the check passes, the first section status information and the second section status information are securely encoded to obtain a data packet; the data packet is sent to the interlocking system through the safety communication interface.

[0038] Based on the above-mentioned embodiment of the present invention, an axle counting system and method based on a safety communication interface are provided, the system includes: an axle counting sensor, an axle counting component with a redundant mechanism, and a communication component; the axle counting sensor is connected to the axle counting component, the axle counting component and the communication component are connected through a redundant CAN bus, the axle counting component is connected to the axle counting component of the adjacent station through an inter-station redundant communication channel, and the communication component is connected to the interlocking system through a safety communication interface; the axle counting sensor is used to generate a wheel current signal when detecting a passing train wheel, and send the current signal to the axle counting component; the axle counting component is used to perform redundant identification based on the wheel current signal to obtain to the first local axle number and the second local axle number; receive the adjacent station axle number sent by the axle counting component of the adjacent station; perform redundant judgment of the section status based on the first local axle number, the second local axle number and the adjacent station axle number, and obtain the first section status information and the second section status information; send the first section status information and the second section status information to the communication component; the communication component is used to perform a safety check based on the first section status information and the second section status information. If the check passes, the first section status information and the second section status information are securely encoded to obtain a data packet; the data packet is sent to the interlocking system through the safety communication interface. In this solution, the communication interface with the interlocking system is replaced by a relay interface with a safety communication interface, replacing a large number of relays, including track relays, station zeroing relays and other track condition relays, which can not only output a variety of information, but also reduce the regular maintenance of relays, saving a lot of equipment costs and construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0040] Figure 1 An architecture diagram of an axle counting system based on a secure communication interface disclosed in an embodiment of the present invention;

[0041] Figure 2 The present invention discloses a flow chart of an axle counting method based on a secure communication interface. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0043] In this application, the terms "comprises", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0044] First, the technical terms used in this application are explained:

[0045] The axle counter, also known as the microcomputer axle counter, is a device installed at stations at both ends of the railway. It uses closed-loop sensors installed on the rails to monitor the number of train wheel pairs passing through. After detection by the microcomputer system and door installed indoors, the number of wheel pairs at this station is sent to the other station using semi-automatic equipment. After the train arrives at the other station, the other station automatically opens the section when it receives the same wheel pair number as the departure station. In other words, it is a railway signaling device that can detect the passing of wheels, which can replace many ordinary track circuits.

[0046] Interlocking equipment refers to the equipment that controls the turnouts, routes and signals of the station and realizes the interlocking relationship between them. Interlocking equipment can be decentralized or centralized. Interlocking equipment is divided into two categories: relay interlocking and computer interlocking.

[0047] As can be seen from the background technology, in the traditional inter-station axle counting system, sensors and processing modules are arranged outdoors, and the processed information is transmitted to the indoor axle counting unit through cables. After the axle counting unit determines the section status information, it transmits the section status information to the interlocking system or 64D equipment through the railway safety relay. However, the relay is expensive, requires regular maintenance, and the output information is limited.

[0048] Therefore, an embodiment of the present invention discloses an axle counting system and method based on a safety communication interface. In this solution, the communication interface with the interlocking system is replaced by a relay interface with a safety communication interface, which replaces a large number of relays, including track relays, inter-station zeroing relays and other track condition relays. It can not only output a variety of information, but also reduce the regular maintenance of relays, saving a lot of equipment costs and construction costs.

[0049] like Figure 1 As shown, it is an architecture diagram of an axle counting system based on a secure communication interface disclosed in an embodiment of the present invention. The axle counting system includes outdoor equipment and indoor equipment. The outdoor equipment includes an axle counting sensor, and the indoor equipment includes an axle counting component and a communication component with a redundant mechanism.

[0050] Among them, the axle counting sensor is connected to the axle counting component, the axle counting component is connected to the communication component through a redundant CAN bus, the axle counting component is connected to the axle counting component of the adjacent station through an inter-station redundant communication channel, and the communication component is connected to the interlocking system through a safety communication interface.

[0051] It should be noted that the secure communication interface in this application is a redundant secure communication interface, which is a technology that improves the reliability and security of the communication system by setting up multiple backup interfaces. Its core principle is to use mutual backup between multiple interfaces to ensure that when a certain interface fails, other interfaces can seamlessly take over the communication tasks, thereby ensuring the continuity and stability of communication.

[0052] In one embodiment, a redundant network port can be used as a secure communication interface. The redundant network port can use a network cable as a transmission medium, or it can be transmitted through a wireless signal. Security coding is used when transmitting data through the secure communication interface, which not only ensures the security of the transmission, but also has high reliability and high intelligence, is easy to maintain, and can transmit a large amount of information.

[0053] The axle counter sensor is used to generate a wheel current signal when detecting a passing train wheel, and send the current signal to the axle counter component.

[0054] Specifically, the axle counter sensor is installed on the rail, and two induction coils are arranged inside the axle counter sensor. The axle counter sensor is specifically used to: when the train wheels pass by, generate wheel current signals by electromagnetic detection, and send the current signals to the axle counter component.

[0055] The axle counting component is used to perform redundant identification based on the wheel current signal to obtain the first axle number of the local station and the second axle number of the local station; receive the axle number of the adjacent station sent by the axle counting component of the adjacent station; perform redundant judgment on the section status based on the first axle number of the local station and the second axle number of the local station and the axle number of the adjacent station to obtain the first section status information and the second section status information; send the first section status information and the second section status information to the communication component.

[0056] Among them, in the scenario of redundant identification based on wheel current signals, redundant identification refers to identifying and confirming the accuracy of a parameter such as the number of axles at this station through multiple independent modules or devices, thereby improving the reliability and accuracy of the system. In other words, different modules or devices are used to identify the number of axles at this station, and then the number of axles at this station identified by different modules or devices is used to determine whether the section is idle. When the determined section status is consistent, it means that the result is accurate. If only one module or device is used to identify the number of axles at this station, difficult-to-find identification errors may occur, which ultimately leads to safety issues.

[0057] Specifically, the axle counting assembly includes: an axle counting signal processing board, a first axle number identification module, a second axle number identification module, a first state judgment module, a second state judgment module and an inter-station communication module.

[0058] The axle counter signal processing board is used to convert the wheel current signal into a level digital signal, and send the level digital signal to the first axle number identification module and the second axle number identification module respectively.

[0059] The first axis number recognition module is used to obtain the first local axis number based on the level digital signal recognition, and send the first local axis number to the first state judgment module.

[0060] The second axis number recognition module is used to obtain the second local axis number based on the level digital signal recognition, and send the second local axis number to the second state judgment module.

[0061] It should be noted that the first axis number identification module and the second axis number identification module are powered by two isolated power supplies to avoid problems occurring at the same time.

[0062] The inter-station communication module is used to receive the axle number of the adjacent station sent by the axle counting component of the adjacent station, and send the axle number of the adjacent station to the first state judgment module and the second state judgment module; if the axle number of the first station and the axle number of the second station are the same, the axle number of the first station or the axle number of the second station is sent as the axle number of the adjacent station to the axle counting component of the adjacent station.

[0063] Among them, the adjacent stations include the previous station and the next station of the current station. If the number of axles of this station is the same as that of a neighboring station, it means that the railway section between the current station and the neighboring station is idle.

[0064] It should be noted that generally, an axle counting system is installed for every station with a distance of 10 kilometers (ratio). Each axle counting system detects the number of axles at its own station, sends it to the adjacent station through the inter-station communication module, and then determines whether the number of axles at its own station is the same as that of the adjacent station. If they are the same, the section is judged to be idle, otherwise the section is judged to be occupied.

[0065] Specifically, the inter-station communication module is used to:

[0066] By using multiple redundantly configured inter-station communication boards, the axle numbers of adjacent stations sent by the axle counting components of adjacent stations are received respectively, and the axle numbers of adjacent stations are sent to the first state judgment module and the second state judgment module; if the axle numbers of the first station and the second station are consistent, then by using multiple redundantly configured inter-station communication boards, the axle number of the first station or the axle number of the second station is sent as the axle number of the adjacent station to the axle counting components of the adjacent station.

[0067] For example, Figure 1 Taking the redundant configuration of two inter-station communication boards as an example, inter-station communication board 1 and inter-station communication board 2 respectively use the first local station axis number or the second local station axis number as the neighboring station axis number, and send the neighboring station axis array packet to the neighboring station inter-station communication board through the redundant inter-station optical fiber channel, 2M channel and FE channel.

[0068] In one embodiment, the first axis number identification module and the second axis number identification module evaluate and obtain sensor status information when performing level digital signal identification, and forward it to the inter-station communication module through the first state judgment module and the second state judgment module. The inter-station communication module uses multiple redundant inter-station communication boards to display the axis number of the neighboring station, the axis number of the first station, the axis number of the second station and the axle counting system status, wherein the axle counting system status includes the sensor status information.

[0069] It should be noted that the sensor status information includes: the abnormal status and abnormal number of the axle counter sensor, etc.

[0070] In one embodiment, the inter-station communication module receives and displays the sensor status information of the neighboring station sent by the neighboring station, and also sends the sensor status information of the local station to the neighboring station, which is displayed by the inter-station communication module of the neighboring station.

[0071] The first status judgment module is used to send the first station axis number to the inter-station communication module; judge whether the adjacent station axis number is consistent with the first station axis number, if they are consistent, obtain the first segment status information indicating that the segment is idle; if they are inconsistent, obtain the first segment status information indicating that the segment is occupied; send the first segment status information to the communication component.

[0072] The second status judgment module is used to send the second station axis number to the inter-station communication module; judge whether the adjacent station axis number is consistent with the second station axis number, if they are consistent, obtain the second segment status information indicating that the segment is idle; if they are inconsistent, obtain the second segment status information indicating that the segment is occupied; send the second segment status information to the communication component.

[0073] It should be noted that before the first status judgment module forwards the first station axis number and sensor status information to the inter-station communication module, and before the second status judgment module forwards the second station axis number and sensor status information to the inter-station communication module, both need to securely encode the data to be sent and then transmit it to the inter-station communication module through the isolated communication port.

[0074] In this application, security coding uses security coding standards issued by the railway, such as the RSSP-I protocol.

[0075] In one embodiment, the axle counter assembly further includes: a fault monitoring module;

[0076] The fault monitoring module is used to receive the fault information sent by the first state judgment module and the second state judgment module when a fault occurs, and output the fault information through the monitoring interface.

[0077] It is understandable that outputting fault information is conducive to the timely execution of the fault recovery operation, thereby enabling the interlocking device to send a reset instruction in time after the fault recovery operation, so that the first state judgment module and the second state judgment module perform the reset operation.

[0078] The communication component is used to perform a safety check based on the first section status information and the second section status information. If the check passes, the first section status information and the second section status information are securely encoded to obtain a data packet; the data packet is sent to the interlocking system through a secure communication interface.

[0079] It should be noted that the purpose of the security check is to ensure that the first segment status information and the second segment status information data are correct. This can be done by judging whether the first segment status information and the second segment status information are consistent. If they are consistent, it means that the first segment status information and the second segment status information are correct and the security check passes.

[0080] In one embodiment, the communication component includes: a first-series communication component and a second-series communication component that are connected to each other, the first-series communication component is connected to the interlocking system through a corresponding interface among multiple redundant safety communication interfaces, and the second-series communication component is connected to the interlocking system through a corresponding interface among multiple redundant safety communication interfaces.

[0081] A series of communication components is used to perform dual-system discrimination based on the first section status information and the second section status information received by the series of communication components, and the first section status information and the second section status information received by the series of communication components. If the dual-system discrimination is passed, the first section status information and the second section status information received by the series of communication components are securely encoded to obtain a first data packet; the first data packet is sent to the interlocking system through the safety communication interface corresponding to the series of communication components.

[0082] Specifically, a series of communication components include: a first processing module, a second processing module, a first forwarding module and a first switching module.

[0083] Among them, the first processing module receives the first segment status information, and the second processing module receives the second segment status information. After the first processing module and the second processing module verify that the first segment status information and the second segment status information are consistent, the first switching module and the second segment status information received by the second-system communication component are subjected to dual-system discrimination. After the dual-system discrimination is passed, the first processing module securely encodes the first segment status information and sends it to the first forwarding module, and the second processing module securely encodes the second segment status information and sends it to the first forwarding module. The first forwarding module packages the first segment status information and / or the second segment status information to obtain a first data packet.

[0084] The second-system communication component is used to perform dual-system discrimination based on the received first-section status information and the second-section status information and the first-section status information received by the first-system communication component. If the dual-system discrimination is passed, the first-section status information and the second-section status information received by the second-system communication component are securely encoded to obtain a second data packet; the second data packet is sent to the interlocking system through the security communication interface corresponding to the second-system communication component.

[0085] Specifically, the second series communication component includes: a third processing module, a fourth processing module, a second forwarding module and a second switching module.

[0086] Among them, the third processing module receives the first segment status information, and the fourth processing module receives the second segment status information. After the third processing module and the fourth processing module verify that the first segment status information and the second segment status information are consistent, the first segment status information and the second segment status information received by the second switching module and the first series communication component are subjected to dual-system discrimination. After the dual-system discrimination is passed, the third processing module securely encodes the first segment status information and sends it to the second forwarding module, and the fourth processing module securely encodes the second segment status information and sends it to the second forwarding module. The second forwarding module packages the first segment status information and / or the second segment status information to obtain a second data packet.

[0087] It should be noted that the first-series communication component and the second-series communication component are redundantly configured components with the same structure and functions. The master-slave mode and the master-parallel mode can be set for the first-series communication component and the second-series communication component. In the master-parallel mode, both series of communication components perform various functions and output normally; in the master-slave mode, the master system equipment performs all functions and outputs all commands, but the standby system may not output according to the site or user needs, but only operate normally, while monitoring its own status, and can also output some specified monitoring information status.

[0088] In one embodiment, the communication component is further configured to:

[0089] An interlock reset command sent by the interlock system is received, and the interlock reset command is forwarded to the first state judgment module and the second state judgment module in the axle counting component, so that the first state judgment module and the second state judgment module perform a reset operation.

[0090] Specifically, the first forwarding module and the second forwarding module in the first communication component and the second communication component are responsible for receiving the interlocking reset command sent by the interlocking system, and then forwarding it to the corresponding processing module, which sends it to the axle counting component through the redundant CAN bus.

[0091] It should be noted that as a special device, the axle counting system needs to be reset to zero when it is powered on for the first time or when a device failure is restored.

[0092] In one embodiment, the axle counting system also includes: an isolated ACDC module, which is respectively connected to the external power interface of the AC220V power input, the power input interface of the axle counting component and the power input interface of the communication component; the isolated ACDC module is used to process the AC220V power input from the external power interface and output isolated DC24V power to the axle counting component and the communication component respectively.

[0093] Among them, the power interface inputs AC220V power, and after passing through the isolated ACDC module, it outputs isolated DC24V power to the communication component and the axle counting component respectively. A lightning protection and filtering protection circuit is also set for the isolated ACDC module.

[0094] Based on the axle counting system based on the safety communication interface disclosed in the above-mentioned embodiment of the present invention, in this solution, each module can perform information processing separately and monitor its own operating status. By monitoring the interface output, the fault handling efficiency is improved and the train delays caused by equipment failures are reduced. At the same time, the communication interface with the interlocking system is replaced by a relay interface with a safety communication interface, which replaces a large number of relays, including track relays, station-to-zero reset relays and other track condition relays. It can not only output a variety of information, but also reduce the regular maintenance of relays, saving a lot of equipment costs and construction costs. The safety communication interface sets redundant channels and adopts safety coding, which not only improves the security of transmission, but also improves the reliability.

[0095] like Figure 2 FIG. 1 is a flowchart of an axle counting method based on a secure communication interface disclosed in an embodiment of the present invention. The method is applied to any axle counting system based on a secure communication interface disclosed in the above-mentioned embodiment of the present invention, and includes the following steps:

[0096] Step S201: When the axle counter sensor detects a passing train wheel, a wheel current signal is generated and the current signal is sent to the axle counter assembly.

[0097] Step S202: the axle counting component performs redundant identification based on the wheel current signal to obtain the first axle number of the local station and the second axle number of the local station; receives the axle number of the adjacent station sent by the axle counting component of the adjacent station; performs redundant judgment on the section status based on the first axle number of the local station and the second axle number of the local station and the axle number of the adjacent station to obtain the first section status information and the second section status information; sends the first section status information and the second section status information to the communication component.

[0098] Step S203: The communication component performs a safety check based on the first section status information and the second section status information. If the check passes, the first section status information and the second section status information are securely encoded to obtain a data packet; the data packet is sent to the interlocking system through the safety communication interface.

[0099] For explanations related to the embodiments of the present invention, please refer to the explanations of any axle counting system based on a secure communication interface disclosed in the above embodiments of the present invention, which will not be repeated here.

[0100] Based on the axle counting method based on a safety communication interface disclosed in the above-mentioned embodiment of the present invention, in this solution, each module can perform information processing separately and monitor its own operating status. By monitoring the interface output, the fault handling efficiency is improved and the train delays caused by equipment failures are reduced; at the same time, the communication interface with the interlocking system is replaced by a relay interface with a safety communication interface, which replaces a large number of relays, including track relays, station-to-zero reset relays and other track condition relays, which can not only output a variety of information, but also reduce the regular maintenance of relays, saving a lot of equipment costs and construction costs; the safety communication interface sets redundant channels and adopts safety coding, which not only improves the security of transmission, but also improves the reliability.

[0101] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can refer to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system or system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiment. The system and system embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without creative work.

[0102] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0103] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An axle counting system based on a secure communication interface, characterized in that: The system comprises: an axle counter sensor, an axle counter component with a redundant mechanism, and a communication component; The axle counting sensor is connected to the axle counting assembly, the axle counting assembly is connected to the communication assembly via a redundant CAN bus, the axle counting assembly is connected to the axle counting assembly of an adjacent station via an inter-station redundant communication channel, and the communication assembly is connected to the interlocking system via a safety communication interface; The axle counter sensor is used to generate a wheel current signal when detecting a passing train wheel, and send the current signal to the axle counter assembly; The axle counting component is used to perform redundant identification based on the wheel current signal to obtain a first axle number of the local station and a second axle number of the local station; receive the axle number of the adjacent station sent by the axle counting component of the adjacent station; perform redundant judgment of the section status based on the first axle number of the local station and the second axle number of the local station and the axle number of the adjacent station to obtain first section status information and second section status information; send the first section status information and the second section status information to the communication component; The communication component is used to perform a safety check based on the first section status information and the second section status information. If the check passes, the first section status information and the second section status information are securely encoded to obtain a data packet; and the data packet is sent to the interlocking system through the safety communication interface.

2. The system according to claim 1, characterized in that The axle counting assembly comprises: an axle counting signal processing board, a first axle number identification module, a second axle number identification module, a first state judgment module, a second state judgment module and an inter-station communication module; The axle counter signal processing board is used to convert the wheel current signal into a level digital signal, and send the level digital signal to the first axle number identification module and the second axle number identification module respectively; The first axis number recognition module is used to obtain a first local axis number based on the level digital signal recognition, and send the first local axis number to the first state judgment module; The second axis number recognition module is used to obtain a second local axis number based on the level digital signal recognition, and send the second local axis number to the second state judgment module; The inter-station communication module is used to receive the axle number of the adjacent station sent by the axle counting component of the adjacent station, and send the axle number of the adjacent station to the first state judgment module and the second state judgment module; if the axle number of the first local station is consistent with the axle number of the second local station, the axle number of the first local station or the axle number of the second local station is sent as the axle number of the adjacent station to the axle counting component of the adjacent station; The first status judgment module is used to send the first local station axis number to the inter-station communication module; judge whether the adjacent station axis number is consistent with the first local station axis number, if consistent, obtain the first segment status information indicating that the segment is idle; if inconsistent, obtain the first segment status information indicating that the segment is occupied; send the first segment status information to the communication component; The second status judgment module is used to send the second station axis number to the inter-station communication module; judge whether the adjacent station axis number and the second station axis number are consistent, if they are consistent, obtain the second segment status information indicating that the segment is idle; if they are inconsistent, obtain the second segment status information indicating that the segment is occupied; send the second segment status information to the communication component.

3. The system according to claim 2, characterized in that The axle counting assembly further includes: a fault monitoring module; The fault monitoring module is used to receive fault information sent by the first state judgment module and the second state judgment module when faults occur, and output the fault information through a monitoring interface.

4. The system according to claim 2, characterized in that The inter-station communication module is specifically used for: By using multiple redundantly configured inter-station communication boards, the axle numbers of the adjacent stations sent by the axle counting components of the adjacent stations are received respectively, and the axle numbers of the adjacent stations are sent to the first status judgment module and the second status judgment module; if the axle number of the first station is consistent with the axle number of the second station, the first axle number of the local station or the second axle number of the local station is sent as the axle number of the adjacent station to the axle counting components of the adjacent stations respectively by using the multiple redundantly configured inter-station communication boards.

5. The system according to claim 2, characterized in that The inter-station communication module is also used for: Using multiple redundantly configured inter-station communication boards, the number of axes of the neighboring station, the number of axes of the first local station, and the number of axes of the second local station are displayed.

6. The system according to claim 2, characterized in that The communication component is further used for: Receive an interlock reset command sent by the interlock system, and forward the interlock reset command to the first state judgment module and the second state judgment module, so that the first state judgment module and the second state judgment module perform a reset operation.

7. The system according to claim 1, characterized in that The communication component comprises: a first communication component and a second communication component connected to each other, wherein the first communication component and the second communication component are respectively connected to the interlocking system through corresponding safety communication interfaces; The first series communication component is used to perform dual-system discrimination based on the first section status information and the second section status information received by the second series communication component, and if the dual-system discrimination is passed, the first section status information and the second section status information received by the first series communication component are securely encoded to obtain a first data packet; and the first data packet is sent to the interlocking system through the security communication interface corresponding to the first series communication component; The second-system communication component is used to perform dual-system discrimination based on the first section status information and the second section status information received by the first-system communication component and the first section status information and the second section status information received by the first-system communication component. If the dual-system discrimination is passed, the first section status information and the second section status information received by the second-system communication component are securely encoded to obtain a second data packet; and the second data packet is sent to the interlocking system through the security communication interface corresponding to the second-system communication component.

8. The system according to claim 1, characterized in that The system further comprises: an isolation ACDC module; The isolated ACDC module is respectively connected to the external power supply interface of the AC220V power supply, the power supply input interface of the axle counting component and the power supply input interface of the communication component; The isolated ACDC module is used to process the AC220V power input from the external power interface and output isolated DC24V power to the axle counting component and the communication component respectively.

9. The system according to any one of claims 1 to 8, characterized in that: The axle counter sensor is installed on the rail, and two induction coils are arranged inside the axle counter sensor. The axle counter sensor is specifically used for: When a train wheel passes by, a wheel current signal is generated by electromagnetic detection, and the current signal is sent to the axle counting assembly.

10. An axle counting method based on a secure communication interface, characterized in that: An axle counting system based on a secure communication interface as described in any one of claims 1 to 9, the method comprising: When the axle counter sensor detects a passing train wheel, a wheel current signal is generated and the current signal is sent to the axle counter assembly; The axle counting component performs redundant identification based on the wheel current signal to obtain a first axle number of the local station and a second axle number of the local station; receives the axle number of the adjacent station sent by the axle counting component of the adjacent station; performs redundant judgment of the section status based on the first axle number of the local station, the second axle number of the local station, and the axle number of the adjacent station to obtain first section status information and second section status information; sends the first section status information and the second section status information to the communication component; The communication component performs a safety check based on the first section status information and the second section status information. If the check passes, the first section status information and the second section status information are securely encoded to obtain a data packet; the data packet is sent to the interlocking system through the safety communication interface.

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