In-station multi-information coding information equipment

Abstract

The invention relates to the technical field of railway signal coding, in particular to in-station multi-information coding information equipment, which adopts a redundant dual-computer hot standby architecture, is switched to a standby channel to continue working through a dual backup and cross check mechanism when any single component fails, and comprises a sending board, a code receiving board, a code receiving board and a code sending board, receiving communication coding input or dial-up input of an upper computer, and controlling the modulation chip to generate a frequency shift excitation signal based on carrier frequency control and low frequency control input; the power amplifier board is used for filtering and amplifying the frequency shift excitation signal generated by the transmitting board based on the received power control input and then outputting a coded signal; the detection board is used for detecting a code sending signal of the track circuit; and the power panel has overvoltage and overcurrent protection functions and is used for supplying power to each component. Compared with the prior art, dynamic adjustment can be achieved according to the actual environment requirement, a good signal coverage effect is achieved, and wide equipment compatibility and flexible field adaptability are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of railway signal coding, and in particular to a multi-information electronically coded information device within a station. Background Art

[0002] Station coding equipment is a kind of equipment used in railway stations to code the communication signals between the station control console and the train to provide faster and more reliable information transmission. It can effectively improve the safety and efficiency of train operation and is an important part of the modern railway communication system.

[0003] In the railway signal system, electronic coding technology plays an indispensable role in improving the safety of train traffic in stations and promoting the development of locomotive signals. With the continuous advancement of technology and changes in market demand, customers have put forward higher requirements for electronic coding equipment, including cost control, miniaturization design, digital management, and seamless integration with other systems (such as axle counting systems and interlocking systems). Although the 8-information, 12-information, 18-information and ZPW-2000 series of frequency-shift electronic coding equipment on the market have been widely used, there is still room for improvement in flexibility, integration and cost control. Therefore, it is particularly important to develop a new type of station electronic coding information equipment. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a chassis-type in-station multi-information electronically encoded information device.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A multi-information electronic coding device in a station adopts a redundant dual-machine hot standby architecture. Through a double backup and cross-check mechanism, when any single component fails, the device will switch to the backup channel to continue working. The coding systems in the main and backup channels include:

[0007] The sending board receives the communication code input or the dial code input of the host computer, and controls the modulation chip to generate a frequency shift excitation signal based on the carrier frequency control and low-frequency control input;

[0008] A power amplifier board, which filters and amplifies the frequency-shifted excitation signal generated by the transmitter board based on the received power control input and then outputs a coded signal;

[0009] Detection board, used to detect the coding signal of the track circuit;

[0010] The power board has overvoltage and overcurrent protection functions and is used to supply power to various components.

[0011] As a preferred technical solution, the sending board adopts a two-by-two redundant architecture, including two independent CPUs, the two CPUs are respectively provided with a watchdog and a run / alarm indicator light, and are connected to the same DIP switch for control; the sending board input and output interfaces include: a CAN bus interface, an amplifier type control input interface, an FSK output port, a Type-C interface, and a power interface;

[0012] The CPU receives carrier frequency control, low frequency control and power amplifier type control inputs, and outputs a carrier frequency control signal to a direct digital frequency synthesizer DDS module; the direct digital frequency synthesizer DDS module generates an electrically coded frequency shift excitation signal based on the carrier frequency control signal, and outputs the signal to the power amplifier board through a 4-way FSK output and a power amplifier and then through the FSK port.

[0013] As a preferred technical solution, the CPU generates an amplifier enable signal to control the power amplifier, and the output signal of the power amplifier is fed back to two independent CPUs via a feedback circuit.

[0014] As a preferred technical solution, the CAN bus interface is connected to two independent CPUs via the CAN bus via an isolation circuit; the Type-C interface is connected to the two CPUs via a download circuit signal.

[0015] As a preferred technical solution, the power interface receives a 24V power input, powers the amplifier through a 24V to 5V power supply, and then provides power to two independent CPUs through two 5V to 3V power supplies.

[0016] As a preferred technical solution, the input and output interfaces of the power amplifier board include: a frequency shift excitation signal input interface, a power control signal interface, a power amplifier output interface and a power supply interface;

[0017] The output power controller receives the frequency-shift excitation signal emitted by the transmitting board from the frequency-shift excitation signal input interface, and amplifies the frequency-shift excitation signal to a constant voltage based on the power control signal received from the power control signal interface. After passing through the protection circuit and the isolation circuit in sequence, the generated frequency-shift signal is sent to the track circuit by the power amplifier output interface.

[0018] As a preferred technical solution, the detection board is used to detect the coded frequency-shifted signal sent to the track circuit, including the carrier frequency, low frequency and voltage. The frequency-shifted input interface of the detection board transmits the collected frequency-shifted signal to the logic processing unit for detection after passing through the isolation transformer, the filter / protection circuit, the analog-to-digital conversion circuit and the operation unit in sequence; the logic processing unit is provided with a reset circuit, a detection display and an alarm display, and is connected to the CAN bus interface; the detection board displays the detected signal and sends the detected coded signal to the host computer through the CAN bus.

[0019] As a preferred technical solution, the input and output interfaces of the power board include: a 24V power input interface, multiple 24V power output interfaces, a 5V power output interface and an IIC bus interface; wherein the 24V power input interface is connected to overvoltage protection, a filtering circuit and an isolation module in sequence, and then connected to each 24V power output after passing through an independent overcurrent protection, and connected to the 5V power output after passing through a 24V to 5V module and overcurrent protection; the power board is also provided with a detection circuit and a status display module, and the detection circuit signal is connected to the IIC bus interface.

[0020] As a preferred technical solution, the multi-information electrocoding equipment has multiple alarm mechanisms, covering the monitoring of multiple key parameters and operating conditions: the sending board can perform voltage over-limit alarm, frequency shift signal over-limit output alarm, communication failure alarm, switching recovery alarm and IO input error alarm.

[0021] As an optimal technical solution, the multi-information electrocoding device has a self-check function. When the device is powered on, it performs self-checks on the communication function, transmission function, frequency shift switching function and detection function; when the host's self-check fails, the work task is automatically switched from the host to a pre-prepared standby machine.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1) The multi-information coding equipment in the station proposed by the present invention realizes the use of multiple carrier frequencies and low-frequency signals, and accurately sends modulated coded signals according to the set requirements. It supports and is compatible with various coded signal transmission requirements including 4, 8, 12, and 18-information frequency shift series coding, as well as the ZPW-2000 frequency shift series coding signal transmission requirements, achieving wide equipment compatibility and flexible on-site adaptability.

[0024] 2) The key code transmission system of the present invention adopts a redundant dual-machine hot standby architecture. When one set fails, the other set should ensure the normal operation of the equipment to ensure the stability and reliability of the system; this architecture uses a double backup and cross-check mechanism to ensure that when any single component fails, the system can still seamlessly switch to the backup channel and continue to work stably, effectively avoiding service interruptions caused by single point failures, and providing safety protection for the operation of the railway signal system.

[0025] 3) The transmission output power of the multi-information coding device of the present invention is continuously adjustable, which can realize dynamic adjustment to meet the requirements of different actual demand environments, so as to achieve better signal coverage effect.

[0026] 4) The present invention has four built-in independent detection modules to detect the coding signals of the track circuit, realizing comprehensive monitoring and real-time analysis of key parameters of the transmitted coded information. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The circuit diagram of the multi-information electronic coding equipment of the station of the present invention;

[0028] Figure 2 This is a schematic diagram of the working circuit of the multi-information electronic coding equipment for the station of the present invention;

[0029] Figure 3 This is a layout diagram of the cage board of the multi-information electronic coding equipment of the station of the present invention;

[0030] Figure 4 This is a principle block diagram of a power board in the multi-information electronic coding equipment of a station of the present invention;

[0031] Figure 5 A block diagram of the circuit principle of a sending board in one embodiment of the present invention;

[0032] Figure 6 A block diagram of the circuit principle of a power amplifier board in one embodiment of the present invention;

[0033] Figure 7 A block diagram of the circuit principle of a detection board in one embodiment of the present invention. DETAILED DESCRIPTION

[0034] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0035] Example 1

[0036] As one embodiment of the present invention, the present invention provides a station multi-information coding device, which is used to realize continuous controllable coding of low / carrier frequency of 4, 8, 12, 18 information formats and ZPW-2000 frequency shift system, and detect the transmitted coded information. Figure 1As shown, the sending board of the coding equipment receives the carrier frequency control input and the low-frequency control input, and controls the modulation chip to generate and send the frequency-shifted excitation signal to the power amplifier board. The power amplifier board filters and amplifies the frequency-shifted excitation signal based on the received power control input and outputs the coded signal. In addition, a detection board is provided to detect the coding signal of the track circuit. This equipment is mainly used to realize the use of multiple carrier frequencies and low-frequency signals, and accurately send the modulated coded signal according to the set requirements. In order to improve the reliability and security of data transmission, the coding function adopts a two-by-two-out-of-two redundant architecture. The key coding system adopts a redundant dual-machine hot standby architecture. When one set fails, the other set should ensure the normal operation of the equipment to ensure the stability and reliability of the system; this architecture uses a double backup and cross-check mechanism to ensure that when any single component fails, the system can still seamlessly switch to the backup channel and continue to work stably, effectively avoiding service interruptions caused by single point failures, and providing safety protection for the operation of the railway signal system.

[0037] The complete working circuit of the station multi-information coding system is as follows: Figure 2 As shown, the multi-information electrocoding device receives the communication coding input or dial code input of the host computer, and generates a frequency shift signal after data processing on the sending board. The signal is amplified to a constant voltage and transmitted to the track circuit by the power amplifier board; the detection board mainly detects the code signal of the track circuit, including carrier frequency, low frequency and voltage. The detection board can detect up to 4 frequency shift signals at the same time. The detection board displays the detected signal and sends the detected code signal to the host computer through the bus. The present invention has a variety of coding signal transmission requirements including 4, 8, 12, and 18 information frequency shift series electrocoding, as well as the ZPW-2000 frequency shift series electrocoding coding signal transmission requirements, supports flexible configuration compatible with multi-standard information formats and frequency shift standards, and realizes wide equipment compatibility and flexible field adaptability; the transmission output power is continuously adjustable, realizing continuous and smooth adjustment from low power to high power. This function meets the requirements of different actual demand environments to achieve dynamic adjustment to achieve better signal coverage effect; the equipment adopts modular design, and each sub-functional module should be independent of each other, so that the failure of any functional module will not cause the failure of other sub-functional modules.

[0038] like Figure 3The figure shows the layout diagram of the cage board of the multi-information electrocoding equipment of the present invention. The 4U 84TE standard cage is used as the main structure, and the pluggable boards such as the sending board, the power amplifier board, the detection board, and the power board are integrated internally, which is convenient for maintenance, upgrading and function expansion. This design effectively reduces the size of the equipment and conforms to the trend of miniaturization. The information to be sent can be flexibly configured according to actual needs, including but not limited to 8 information, 12 information, 18 information and custom information, which improves the applicability and flexibility of the equipment. The system power supply adopts dual sets of hot standby. When one set fails, the other set should ensure the normal operation of the equipment. The detection board is equipped with an external information output communication interface, and the system is specially equipped with a standardized external information output communication interface to facilitate system integration and data sharing. The power board has overvoltage and overcurrent protection functions.

[0039] like Figure 4 As shown, the input and output interfaces of the power board include: a 24V power input interface, multiple 24V power output interfaces, a 5V power output interface and an IIC bus interface; wherein, after the 24V power input, there are connected to overvoltage protection, filtering circuit and isolation module in sequence, and then connected to each 24V power output through an independent overcurrent protection, and connected to the 5V power output through a 24V to 5V module and overcurrent protection; the power board is also provided with a detection circuit and a status display module, and the detection circuit signal is connected to the IIC bus interface.

[0040] like Figure 5 As shown, the sending board also adopts a two-by-two redundant architecture, including two independent CPUs, each of which is connected to a watchdog and a run / alarm indicator light, and is connected to the same DIP switch for control. The CPU outputs a carrier frequency control signal to the direct digital frequency synthesizer DDS module, and the DDS module generates an electrocoded coded frequency shift excitation signal, which is output to the power amplifier board through 4-way FSK output and the power amplifier through the FSK port. The power amplifier is controlled by the CPU generating an amplifier enable signal, and the output signal of the power amplifier is fed back to the two independent CPUs through the sampling circuit. The input and output interfaces of the sending board include: a CAN bus interface, an amplifier type control input interface, an FSK output port, two Type-C interfaces, and a 24V / 15W power interface. Among them, the two independent CPUs are connected to the CAN bus interface through the CAN bus after passing through the isolation circuit; the two Type-C interfaces are connected to the two CPUs through the download circuit; the 24V power input powers the power amplifier after passing through a 24V to 5V power supply, and then two 5V to 3V power supplies are used to provide power to the two independent CPUs.

[0041] like Figure 6As shown, the input and output interfaces of the power amplifier board include: a frequency-shift excitation signal input interface, a power control signal interface, a power amplifier output interface, and a 24V / 85W power supply interface; wherein, the frequency-shift excitation signal is input to the output power controller after passing through the isolation circuit, the output power controller receives the power control signal and amplifies the frequency-shift signal to a constant voltage, and after passing through the protection circuit and the isolation circuit in turn, the power amplifier output interface sends the generated frequency-shift signal to the track circuit. The power amplifier board can realize the function of continuously adjustable transmission output power, meet the requirements of different actual demand environments, and realize dynamic adjustment to achieve better signal coverage. The 24V / 85W power supply interface supplies power to the isolation and output power controllers respectively.

[0042] like Figure 7 As shown in the figure, the detection board mainly detects the code signal sent to the track circuit, including carrier frequency, low frequency and voltage. It has four independent detection modules built in, and can detect up to 4 signals at the same time. The frequency shift input interface of the detection board transmits the collected frequency shift signal to the logic processing unit for detection after passing through the isolation transformer, filter / protection circuit, analog-to-digital conversion circuit and operation unit in sequence; the logic processing unit is provided with a reset circuit, a detection display and an alarm display, and is connected to the CAN bus interface. The detection board displays the detected signal and sends the detected coded signal to the upper computer through the bus. The 24V / 15W power input of the detection board is converted to 1.8V and 3.3V by the power supply to power the operation unit and the logic processing unit respectively.

[0043] The sending board of the present invention adopts double sets of hot standby to ensure seamless and efficient switching between the main and standby systems. The short switching time strictly follows and exceeds the shortest interruption time standard that the locomotive signal system can tolerate, thereby greatly improving the continuity and reliability of signal transmission. The sending board is not only comprehensive in function, but also highly flexible. It can send a variety of coded signals including 4, 8, 12, and 18 information frequency shift series electrocoding, as well as the widely used ZPW-2000 frequency shift series electrocoding coded signals, fully meeting the diversified needs of different railway communication systems. In terms of signal output, it strictly follows the industry standards for waveform quality to ensure that each signal waveform is pure and distortion-free. At the same time, its power output is precisely regulated, which not only ensures the long-distance coverage capability of signal transmission, but also effectively avoids energy waste and potential electromagnetic interference problems, providing solid technical support for safe and efficient railway operation.

[0044] The present invention works on the principle of host priority, that is, under normal circumstances, all code-generating tasks are undertaken by the host to fully utilize its high performance and stability advantages. However, once the host encounters any form of failure, including but not limited to power outages caused by power failures, output power voltage exceeding the preset safety range, output carrier frequency or low-frequency signal deviation from the allowable value and other key parameter over-limit situations, the system will immediately start the automatic switching process and seamlessly and quickly transfer the code-generating tasks to the standby machine in hot standby state.

[0045] The present invention is provided with a four-way detection function: the system has four built-in independent detection modules, which realizes comprehensive monitoring and real-time analysis of key parameters;

[0046] The present invention has multiple alarm mechanisms, covering the monitoring of multiple key parameters and operating conditions: the sending board has voltage over-limit alarm, frequency shift signal over-limit output alarm, communication failure alarm, switching recovery alarm, IO input error alarm, etc., which provides strong support for the stable operation and troubleshooting of the system.

[0047] The present invention has a self-checking function. When the system is powered on, it performs self-checking on the communication function, the transmission function, the frequency shift switching function and the detection function to ensure that each key functional module is in the best working state. When the self-check of the host fails, the working task is automatically switched from the host to the pre-prepared standby machine, which ensures the continuity and stability of the system and avoids communication interruption or data loss caused by the failure of the transmission function. The "fail-safe" principle is well met.

[0048] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A multi-information coding device within a station, characterized in that: The redundant dual-machine hot standby architecture is adopted. Through the double backup and cross-check mechanism, when any single component fails, the equipment will switch to the backup channel to continue working. The code sending systems in the main and backup channels include: The sending board receives the communication code input or the dial code input of the host computer, and controls the modulation chip to generate a frequency shift excitation signal based on the carrier frequency control and low-frequency control input; A power amplifier board, which filters and amplifies the frequency-shifted excitation signal generated by the transmitter board based on the received power control input and then outputs a coded signal; Detection board, used to detect the coding signal of the track circuit; The power board has overvoltage and overcurrent protection functions and is used to supply power to various components.

2. The in-station multi-information electronic coding device according to claim 1, characterized in that: The sending board adopts a two-by-two redundant architecture, including two independent CPUs, the two CPUs are respectively connected to a watchdog and a running / alarm indicator light, and are connected to the same DIP switch for control; the sending board input and output interfaces include: a CAN bus interface, an amplifier type control input interface, an FSK output port, a Type-C interface, and a power interface; The CPU receives carrier frequency control, low frequency control and power amplifier type control inputs, and outputs a carrier frequency control signal to a direct digital frequency synthesizer DDS module; the direct digital frequency synthesizer DDS module generates an electrically coded frequency shift excitation signal based on the carrier frequency control signal, and outputs the signal to the power amplifier board through a 4-way FSK output and a power amplifier and then through the FSK port.

3. The in-station multi-information electronic coding device according to claim 2, characterized in that: The CPU generates an amplifier enable signal to control the power amplifier, and the output signal of the power amplifier is fed back to two independent CPUs via a feedback circuit.

4. The in-station multi-information electronic coding device according to claim 2, characterized in that: The CAN bus interface is connected to two independent CPUs via the CAN bus via an isolation circuit; the Type-C interface is connected to the two CPUs via a download circuit signal.

5. The in-station multi-information electronic coding device according to claim 2, characterized in that: The power interface receives a 24V power input, powers the amplifier through a 24V to 5V power supply, and then provides power to two independent CPUs through two 5V to 3V power supplies.

6. The in-station multi-information electronic coding device according to claim 1, characterized in that: The input and output interfaces of the power amplifier board include: a frequency shift excitation signal input interface, a power control signal interface, a power amplifier output interface and a power supply interface; The output power controller receives the frequency-shift excitation signal emitted by the transmitting board from the frequency-shift excitation signal input interface, and amplifies the frequency-shift excitation signal to a constant voltage based on the power control signal received from the power control signal interface. After passing through the protection circuit and the isolation circuit in sequence, the generated frequency-shift signal is sent to the track circuit by the power amplifier output interface.

7. The in-station multi-information electronic coding device according to claim 1, characterized in that: The detection board is used to detect the coded frequency-shifted signal sent to the track circuit, including carrier frequency, low frequency and voltage. The frequency-shifted input interface of the detection board transmits the collected frequency-shifted signal to the logic processing unit for detection after passing through the isolation transformer, filtering / protection circuit, analog-to-digital conversion circuit and operation unit in sequence; the logic processing unit is provided with a reset circuit, a detection display and an alarm display, and is connected to the CAN bus interface; the detection board displays the detected signal and sends the detected coded signal to the upper computer through the CAN bus.

8. The in-station multi-information electronic coding device according to claim 1, characterized in that: The input and output interfaces of the power board include: a 24V power input interface, multiple 24V power output interfaces, a 5V power output interface and an IIC bus interface; wherein the 24V power input interface is sequentially connected to an overvoltage protection, a filtering circuit and an isolation module, and then connected to each 24V power output through an independent overcurrent protection, and connected to the 5V power output through a 24V to 5V module and overcurrent protection; the power board is also provided with a detection circuit and a status display module, and the detection circuit signal is connected to the IIC bus interface.

9. The in-station multi-information electronic coding device according to claim 1, characterized in that: The multi-information electrocoding equipment has multiple alarm mechanisms, covering the monitoring of multiple key parameters and operating conditions: the sending board can perform voltage over-limit alarm, frequency shift signal over-limit output alarm, communication failure alarm, switching recovery alarm and IO input error alarm.

10. The in-station multi-information electronic coding device according to claim 1, characterized in that: The multi-information electronic coding device has a self-checking function. When the device is powered on, it performs self-checks on the communication function, the transmission function, the frequency shift switching function and the detection function. When the self-check of the host fails, the working task is automatically switched from the host to the pre-prepared standby machine.

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