A low-power shunting protection device for closed-loop message detection

Abstract

The low-power shunting protection device with closed-loop message detection of the present invention comprises an interface module, a message transmission module, and a Cr interface connecting the two; the Cr interface comprises an interface Cr1 and an interface Cr6 transmitted from the interface module to the message transmission module, and a Cr2 check signal transmitted from the message transmission module to the interface module; the message transmission module is compatible with both the standard C interface of the existing active transponder and the Cr interface; when the message transmission module is activated by the train BTM antenna, an FSK signal containing Cr1 interface data is transmitted to the BTM antenna, and a Cr2 check signal is output to the interface module at the same time. The technical advantages of the present invention are as follows: the Cr interface has high functional reliability and low power consumption, and can realize closed-loop monitoring of the message data sent by the message transmission module, and can meet the low power consumption requirements of the single-point dual-control of the shunting protection system.

Description

Technical Field

[0001] The invention relates to a low-power shunting protection device for message closed-loop detection. Background Art

[0002] The shunting protection device is a low-cost shunting protection device, which is installed in a dispersed manner near the trackside signal. The shunting protection device is divided into an interface module (trackside part) and a message transmission module (trackbed part). The interface module collects the lighting status of the signal and sends the corresponding message stored in itself to the message transmission module. The message transmission module transmits the message to the EMU on-board equipment through vehicle-ground communication to realize the protection of EMU shunting operation.

[0003] The shunting protection device obtains its working power from the signal machine. In order not to affect the normal operation of the signal machine, strict restrictions are imposed on the power consumption of the shunting protection device, which is no more than 8W. The interface module is used to collect the lighting status of the signal machine. When the shunting protection system is arranged, because the signal machine is set up with a switch outside, both tracks need to install a message transmission module, which creates a need for one interface module to drive two message transmission modules (i.e., single-point dual control). Because the interface module drives the message transmission module through the C interface, which has a higher reliability in European standard applications, this method requires a larger input power. In order to meet the requirements of external power consumption, a power consumption optimization circuit needs to be designed to reduce the power consumption of the C interface.

[0004] In addition, after the interface module transmits the message to the message transmission module, it is unable to obtain the final sending status of the message. Only when the EMU passes, the working status of the message transmission module is determined according to the data received by the EMU. A closed-loop detection mechanism needs to be designed to monitor the working status of the message transmission module in real time when the EMU does not pass, and improve the system availability through early warning. Summary of the invention

[0005] Aiming at the demand for early warning through message monitoring during EMU shunting operation, the present invention designs a low-power shunting protection device with message closed-loop detection.

[0006] The present invention provides a low-power shunting protection device for closed-loop message detection, the shunting protection device comprises an interface module, a message transmission module, and a Cr interface connecting the two;

[0007] The interface module collects the 220V lighting circuit of the signal machine to obtain the lamp position information, and selects the corresponding message according to the lamp position information and sends it to the message transmission module through the Cr interface;

[0008] The Cr interface includes an interface Cr1 and an interface Cr6 transmitted from the interface module to the message transmission module, and a Cr2 check signal transmitted from the message transmission module to the interface module;

[0009] The message transmission module is a data transmission unit, which is connected to the interface module and transmits information from the interface module to the on-board equipment. It is compatible with both the standard C interface of the existing active transponder and the Cr interface. When the message transmission module is activated by the train BTM antenna, it transmits an FSK signal containing Cr1 interface data to the BTM antenna and outputs the Cr2 return check signal to the interface module.

[0010] The control mode of the Cr interface: the Cr1 interface is always sent to ensure that the message transmission module continues to obtain continuous message data; the Cr6 interface is sent at intervals controlled by the interface module to reduce the power consumption of the interface module; the Cr2 check signal is sent when the interface module sends Cr6 and when the message transmission module is activated by the BTM antenna

[0011] The technical advantages of the present invention are: the Cr interface function has high reliability and low power consumption. It can not only realize closed-loop monitoring of the message data sent by the message transmission module, but also take timely countermeasures once the active message transmission module sends an error message, and meet the low power consumption requirements of single-point dual control of the shunting protection system. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the real-time closed-loop monitoring principle of the shunting protection device of the present invention;

[0013] Figure 2 This is a schematic diagram of the principle of monitoring the train passing state by the shunting protection device of the present invention;

[0014] Figure 3 It is a schematic diagram of the single-point dual-control principle of the shunting protection device of the present invention. DETAILED DESCRIPTION

[0015] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several variations and improvements may be made without departing from the inventive concept, and these all belong to the protection scope of the present invention.

[0016] The low-power shunting protection device of the present invention obtains lamp position information from the 220V lighting circuit of the signal machine, obtains induced current information from the filament of the signal machine, and then collects message signals from the output end of the message transmission module driver. The interface module compares the message information checked back from the interface A of the message transmission module with the collected lamp position information and current information to achieve safe closed-loop monitoring.

[0017] The shunting protection device of the present invention comprises a special interface module, a message transmission module, and a special interface Cr (Interface C Reduce) connecting the two.

[0018] The interface module collects the 220V lighting circuit of the signal machine to obtain the lamp position information, and selects the corresponding message according to the lamp position information and sends it to the active message transmission module through the Cr interface.

[0019] The message transmission module is compatible with both the standard C interface and the Cr interface of the existing active transponder.

[0020] The dedicated interface Cr includes an interface Cr1 and an interface Cr6 for transmitting from the interface module to the message transmission module, and a Cr2 check signal for transmitting from the message transmission module to the interface module.

[0021] When the message transmission module receives only Cr1 interface data, it does not output Cr2 interface data. When receiving Cr1 and Cr6, the message transmission module outputs a Cr2 check signal to the interface module. When activated by the train BTM antenna, it transmits an FSK signal containing Cr1 interface data to the BTM antenna and outputs a Cr2 check signal to the interface module.

[0022] Control mode of Cr interface: Cr1 interface is always sent to ensure that the message transmission module continues to obtain continuous message data; Cr6 interface is sent at intervals controlled by the interface module to reduce the power consumption of the interface module; Cr2 is sent when the interface module sends Cr6 and when the message transmission module is activated by the BTM antenna.

[0023] The low-power shunting protection device for closed-loop message detection of the present invention is composed of an interface module, a message transmission module and a Cr interface therebetween. Figure 1 shown.

[0024] The dedicated interface Cr includes interface Cr1 and interface Cr6 for transmitting from the interface module to the message transmission module, and message return signal interface Cr2 for transmitting from the message transmission module to the interface module. The Cr1 signal is a DBPL code with an amplitude of 4-6Vpp (partial parameters of the 036 standard are quoted) containing the message data corresponding to the current light position of the signal machine; the Cr6 signal is a 8.82Khz sine wave with an amplitude of 10-15Vpp (partial parameters of the 036 standard are quoted); the Cr2 return signal is a waveform with a code rate of 564Khz, containing the message data currently sent by the single-point dual-control message transmission module (partial parameters of the 036 standard are quoted).

[0025] The interface module obtains the light position information by connecting to the 220V lighting circuit of the signal machine in parallel, selects the corresponding message data according to the light position, converts it into DBPL code, and sends the Cr1 signal to the message transmission module in real time through the C1 power amplifier circuit; Figure 1 The interface modules in include:

[0026] FPGA, a programmable logic array, can flexibly implement hardware logic functions through software programming;

[0027] C1 power amplifier (circuit), used to isolate and drive the original C1 code element, and output a Cr1 signal with an amplitude of 4-6Vpp;

[0028] C6 power amplifier (circuit), used for signal isolation and drive amplification of the original C6 sinusoidal signal, and outputting 8.82Khz Cr6 signal with an amplitude of 10-15Vpp;

[0029] The message transmission module is a data transmission unit that is connected to the interface module and transmits information from the interface module to the vehicle-mounted device. Figure 1 The message transmission module includes:

[0030] Data management module, used for receiving Cr1 signal and restoring DBPL coded signal into message data;

[0031] FLASH is a commonly used electronically erasable and programmable non-volatile memory used to store default messages in the message transmission module;

[0032] The FSK processing module identifies the data in the data management module and FLASH, selects the available message data, modulates the message data into an FSK sinusoidal signal and sends it to the vehicle-mounted device;

[0033] The power module is used to obtain external power to provide working energy for the message transmission module and other modules. The activation energy provided by the Cr6 signal energy or the vehicle-mounted equipment (such as the BTM antenna) can be used;

[0034] The back-check module (back-check circuit) is used to demodulate the FSK signal sent to the outside and convert it into a Cr2 signal with a code rate of 564Khz for closed-loop back-check.

[0035] The interface module periodically sends the Cr6 signal to the message transmission module through the C6 power amplifier, which is received and processed by the power module as the driving energy for the backcheck circuit in the message transmission module. When the Cr6 signal is sent, the backcheck module of the message transmission module is started, and the FSK signal sent out by the message transmission module is used to backcheck the message sent out, and the backcheck signal Cr2 is sent back to the interface module.

[0036] After receiving the Cr2 return check signal, the interface module restores the signal to the message data of the corresponding channel; at the same time, the interface module collects the 220V power supply status and filament status of the signal machine in real time, and compares the three with each other to achieve complete closed-loop monitoring to monitor whether the indicator light position of the signal machine is the same as the content of the message sent.

[0037] Effect: Through the innovative design of the Cr interface, the active transponder C interface is upgraded from simplex transparent transmission to a duplex closed-loop control interface with detection function, realizing the closed-loop monitoring function of the defense system and ensuring that the sent message is completely consistent with the status of the signal machine.

[0038] When the EMU onboard equipment (such as BTM antenna) passes over the message transmission module, the message transmission module is provided with working energy by the activation signal of the onboard equipment, and transmits the FSK signal containing Cr1 data to the onboard equipment, such as Figure 2 shown.

[0039] The energy provided by the vehicle-mounted equipment activates the check circuit. At this time, the interface module sends Cr6 periodically, which may be in two states: sending or not sending. The power module of the message transmission module locks one working power supply through the interlocking mechanism. The specific method is as follows:

[0040] When the Cr6 signal is not sent, when the vehicle-mounted device passes by, the power module can obtain the downlink energy provided by the vehicle-mounted device as the working power supply to power each module in the message transmission module; and lock this state, and no longer use the Cr6 signal before the energy disappears. The backcheck module backchecks the message sent out through the FSK signal sent out by the message transmission module, and sends the backcheck signal Cr2 back to the interface module.

[0041] When the Cr6 signal is sent, when the vehicle-mounted equipment passes by, the power module obtains the Cr6 signal as the working power supply to power each module in the message transmission module; and locks this state, and no longer uses the energy of the vehicle-mounted equipment before the energy disappears. The backcheck module backchecks the message sent out through the FSK signal sent out by the message transmission module, and sends the backcheck signal Cr2 back to the interface module.

[0042] The check circuit outputs a Cr2 check signal to the interface module. The interface module compares the signal according to the same logic as above, combines the signal light position switching information, records the train passing time, and realizes the message data monitoring when the train passes the point.

[0043] Effect: By designing a power interlocking mechanism, the train passing time is realized, and the message data sent by the message transmission module to the on-board equipment is monitored in real time. If the train receives abnormal information, the state of the train when passing the point is often difficult to reproduce. This monitoring function can be used to reproduce the monitoring data, which is convenient for fault analysis and location.

[0044] When the shunting protection system is arranged, because the switch is set outside the signal machine, it is necessary to install a message transmission module on both tracks, which creates a need for one interface module to drive two message transmission modules (i.e. single-point dual control). Because the C-interface amplifier output requires a large amount of energy, and in the single-point dual-control mode, the interface module needs to provide 2 C-interface signals. In order to solve the problem of excessive power consumption in the single-point dual-control mode, the low-power shunting protection device of the present invention uses FPGA to perform time-sharing control on the two-way Cr6 signal transmission in the single-point dual-control mode, see Figure 3 That is, by identifying the parameter configuration of the interface module, when multiple Cr6 signals need to be provided, the overall power consumption of the interface module is reduced by controlling Cr6 to send the first Cr6 and the second Cr6 signals at intervals, thereby meeting the low power consumption requirements of distributed dispatching from the signal machine, and at the same time having the ability of multi-channel expansion.

[0045] In summary, the advantages of the present invention are as follows:

[0046] 1) Through the innovative design of the Cr interface, the active transponder C interface is upgraded from simplex transparent transmission to a duplex closed-loop control interface with detection function, and the output message collected by the closed-loop is compared with the lighting status of the signal machine in real time, realizing the closed-loop monitoring function of the defense system;

[0047] 2) Through the power interlocking mechanism, the train passing time is realized, and the message data sent by the message transmission module to the on-board equipment is monitored in real time, which can be used to reproduce the monitoring data and facilitate the fault analysis and positioning of the train passing time;

[0048] 3) By controlling multiple Cr interfaces in time-sharing mode and sending Cr6 signals at intervals, the output power consumption of the interface module is reduced, meeting the low-power consumption requirement of decentralized dispatching by drawing power from signal machines, while having the ability of multi-channel expansion.

[0049] The above is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A low-power shunting protection device for closed-loop message detection, the shunting protection device comprising an interface module, a message transmission module, and a Cr interface connecting the two; The interface module collects the 220V lighting circuit of the signal machine to obtain the lamp position information, and selects the corresponding message according to the lamp position information and sends it to the message transmission module through the Cr interface; The Cr interface includes an interface Cr1 and an interface Cr6 transmitted from the interface module to the message transmission module, and a Cr2 check signal transmitted from the message transmission module to the interface module; The message transmission module is a data transmission unit, which is connected to the interface module and transmits information from the interface module to the on-board equipment. It is compatible with both the standard C interface of the existing active transponder and the Cr interface. When the message transmission module is activated by the train BTM antenna, it transmits an FSK signal containing Cr1 interface data to the BTM antenna and outputs the Cr2 return check signal to the interface module. The control mode of the Cr interface is as follows: the Cr1 interface is always sent to ensure that the message transmission module continues to obtain continuous message data; the Cr6 interface is sent at intervals controlled by the interface module to reduce the power consumption of the interface module; the Cr2 check signal is sent when the interface module sends Cr6 and when the message transmission module is activated by the BTM antenna.

2. The shunting protection device according to claim 1, characterized in that: The interface module includes FPGA, C1 power amplifier and C6 power amplifier, and the message transmission module includes a power supply module and a return detection module. The interface module periodically sends a Cr6 signal to the message transmission module through the C6 power amplifier, which is received and processed by the power module and used as driving energy for the return detection circuit in the message transmission module.

3. The shunting protection device according to claim 2, characterized in that: The interface module obtains the lamp position information by connecting to the 220V lighting circuit of the signal machine in parallel, selects the corresponding message data according to the lamp position, converts it into DBPL code, and sends the Cr1 signal to the message transmission module in real time through the C1 power amplifier.

4. The shunting protection device according to claim 2, characterized in that: When the Cr6 signal is sent, the backcheck module of the message transmission module is started, and the FSK signal is sent outward through the message transmission module, the message sent outward is backchecked, and the backcheck signal Cr2 is sent back to the interface module.

5. The shunting protection device according to claim 4, characterized in that: After receiving the Cr2 check signal, the interface module restores the signal to the message data of the corresponding channel; at the same time, the interface module collects the 220V power supply status and filament status of the signal machine in real time, and compares the three with each other to achieve complete message closed-loop monitoring, and monitor whether the indicator light position of the signal machine is the same as the content of the message sent.

6. The shunting protection device according to claim 2, characterized in that: The power module of the message transmission module locks one working power supply through an interlocking mechanism: When the Cr6 signal is not sent, when the vehicle-mounted device passes by, the power module can obtain the downlink energy provided by the vehicle-mounted device as the working power supply to power each module in the message transmission module; and lock this state, and no longer use the Cr6 signal before the energy disappears; When the Cr6 signal is sent, when the on-board equipment passes by, the power module obtains the Cr6 signal as the working power supply to power each module in the message transmission module; and locks this state, and no longer draws energy from the on-board equipment before the energy disappears.

7. The shunting protection device according to claim 5, characterized in that: The interface module compares the Cr2 return check signal, combines the signal light position switching information, records the train passing time, and realizes real-time monitoring of the message data of the train passing time; When the train receives abnormal information, this monitoring function can be used to reproduce the monitoring data to facilitate fault analysis and location.

8. The shunting protection device according to claim 2, characterized in that: The interface module uses the FPGA to perform time-sharing control on the sending of two Cr6 signals in the single-point dual-control mode, that is, by identifying the parameter configuration of the interface module, when multiple Cr6 signals need to be provided, the overall power consumption of the interface module is reduced by controlling Cr6 to send the first Cr6 and the second Cr6 at intervals respectively, thereby meeting the low-power consumption requirements of decentralized control that draws power from signal machines, and having the ability of multi-channel expansion.

Images