Track circuit reader test interface switching device

Abstract

The utility model discloses a track circuit reader test interface switching device, and relates to the field of track circuit equipment. The utility model aims to solve the problem that the traffic safety is influenced because the number of test items of TCR equipment is small. According to the track circuit reader test interface switching device of the utility model, a CAN signal input / output end of a CAN isolation transmit-receive module is used for being connected with a CAN bus of a DB15 connector, and a logic level input / output end of the CAN isolation transmit-receive module is connected with a logic level input / output end of an MCU. The parallel port information input and output end of the MCU is connected with the parallel port information input and output end of the optocoupler, and the optocoupler outputs or receives signals through the external input and output signal test interface module.

Description

Technical Field

[0001] This utility model belongs to the field of track circuit equipment. Background Technology

[0002] The Track Circuit Reader (TCR) is a key piece of equipment in the EMU signaling system. It is primarily used to receive and analyze track circuit information, providing train operation control commands to the onboard safety computer (such as ATP). Figure 1 As shown, the TCR senses the rail current through a receiving coil, identifies the rail circuit type (such as ZPW-2000A, frequency shift, etc.), decodes it, and sends it to the subsequent ATP equipment via a serial RS422 interface, supporting CTCS-2 / 3 level train control systems. The TCR equipment components include the main unit, receiving coil, and connecting cable.

[0003] TB / T 3533-2018 "Track Circuit Reader (TCR)" specifies the following performance indicators for the receiving coil: DC resistance not greater than 8Ω, inductance not less than 60mH, and quality factor not less than 5.5; it also specifies key parameters such as receiving sensitivity and strain time of the track circuit reader.

[0004] Currently, the "Railway Technical Management Regulations" standardize the management of CTCS-2 / 3 level train control onboard equipment, but the testing items for TCR equipment are limited. The existing tests include: checking coil installation height (but not measuring coil DC resistance, inductance, or quality factor), cable wiring inspection, TCR host power-on inspection (only checking the power indicator light, not measuring the specific voltage value), and TCR host decoding output (only checking the decoding capability, not measuring specific indicators such as sensitivity and strain time). The existing tests do not measure the core technical indicators of the TCR equipment, such as receiving coil parameters and TCR host sensitivity and strain time. However, as the TCR equipment ages, key parameters may degrade, potentially affecting train operation safety. Utility Model Content

[0005] This invention addresses the problem of limited testing items for TCR equipment, which affects driving safety. It provides a track circuit reader test interface adapter that outputs DB15 connector signals and converts CAN information into parallel port information, allowing users to perform measurements directly or connect other TCR testing instruments to the adapter for measurement.

[0006] The track circuit reader test interface adapter includes: an external input / output signal test interface module 4 and a circuit board 7;

[0007] The circuit board 7 includes: a CAN isolation transceiver module, an MCU, an optocoupler, and a dual-row pin signal input / output interface module;

[0008] The CAN signal input / output terminal of the CAN isolation transceiver module is used to connect to the CAN bus of the DB15 connector 5. The logic level input / output terminal of the CAN isolation transceiver module is connected to the logic level input / output terminal of the MCU. The parallel port information input / output terminal of the MCU is connected to the parallel port information input / output terminal of the optocoupler. The optocoupler outputs or receives signals through the dual-row pin signal input / output interface module. The optocoupler also outputs signals through the external input / output signal test interface module 4.

[0009] Furthermore, the aforementioned track circuit reader test interface adapter, the circuit board 7 further includes: a power conversion module, the power input terminal of which is connected to the power supply of the track circuit reader via a DB15 connector 5, the power output terminal of which is connected to the voltage interfaces of the CAN isolation transceiver module, the MCU power input terminal, and the optocoupler input terminal, respectively, and the voltage interface of the optocoupler output terminal is connected to the power supply of the track circuit reader via a DB15 connector 5.

[0010] Furthermore, the aforementioned external input / output signal test interface module 4 and the dual-row pin signal input / output interface module both include: coil signal interface 1, working voltage measurement interface 2, and parallel port information output unit 3. The dual-row pin signal input / output interface module also includes: uplink signal input interface SX, downlink signal input interface XX, forced A-machine signal input interface, and forced B-machine signal input interface.

[0011] The coil signal interface 1 is connected to the coil signal interface of the track circuit reader via the DB15 connector 5;

[0012] The working voltage measurement interface 2 is connected to the working power supply of the track circuit reader through the DB15 connector 5;

[0013] The parallel port information output terminal of the optocoupler is connected to the parallel port information output unit 3;

[0014] The uplink signal input terminal of the optocoupler is connected to the uplink signal input interface SX;

[0015] The downlink signal input terminal of the optocoupler is connected to the downlink signal input interface XX;

[0016] The forced A-machine signal input terminal of the optocoupler is connected to the forced A-machine signal input interface;

[0017] The forced B-mode signal input terminal of the optocoupler is connected to the forced B-mode signal input interface.

[0018] Furthermore, the aforementioned coil signal interface 1 includes: an A coil signal interface and a B coil signal interface.

[0019] The A coil signal interface is connected to the A coil signal interface of the track circuit reader via the DB15 connector 5.

[0020] The B coil signal interface is connected to the B coil signal interface of the track circuit reader via the DB15 connector 5.

[0021] Furthermore, the aforementioned operating voltage measurement interface 2 includes: a 24V+ interface and a 24V- interface.

[0022] The 24V+ interface is connected to the 24V+ interface of the track circuit reader's power supply via the DB15 connector 5, and the 24V- interface is connected to the 24V- interface of the track circuit reader's power supply via the DB15 connector 5.

[0023] Furthermore, the aforementioned parallel port information output unit 3 includes: speed level 1 output interface SD1, speed level 2 output interface SD2, speed level 3 output interface SD3, insulating joint output interface JYJ, green signal display device L, green-yellow signal display device LU, yellow signal display device U, yellow signal 2 lamp U2, red-yellow signal display device HU, double yellow signal display device UU, red signal display device H, and white signal display device B;

[0024] The speed level 1 output terminal, speed level 2 output terminal, speed level 3 output terminal, and insulating joint output terminal of the optocoupler are respectively connected to the speed level 1 output interface SD1, the speed level 2 output interface SD2, the speed level 3 output interface SD3, and the insulating joint output interface JYJ.

[0025] The green light signal output terminal, green-yellow light signal output terminal, yellow light signal output terminal, red-yellow light signal output terminal, double yellow light signal output terminal, red light signal output terminal, and white light signal output terminal of the optocoupler are respectively connected to the green signal display device L, green-yellow signal display device LU, yellow signal display device U, yellow signal 2 lamp U2, red-yellow signal display device HU, double yellow signal display device UU, red signal display device H, and white signal display device B.

[0026] Furthermore, the aforementioned track circuit reader test interface adapter also includes a housing 6, which has a cubic structure. The front and rear surfaces of the housing 6 have circular holes 6-1 and square holes 6-2, respectively, and the upper surface of the housing 6 has multiple insertion holes.

[0027] The external input / output signal test interface module 4 and the circuit board 7 are both located inside the housing 6.

[0028] Furthermore, the cable of the aforementioned DB15 connector 5 extends into the interior of the housing 6 through the circular hole 6-1.

[0029] The dual-row pin signal input / output interface module is embedded in the square hole 6-2.

[0030] The coil signal interface 1, working voltage measurement interface 2, and parallel port information output unit 3 of the external input / output signal test interface module 4 correspond one-to-one with the embedding holes and are embedded in the corresponding embedding holes.

[0031] Furthermore, banana-shaped sockets are provided in the corresponding embedding holes of the coil signal interface 1 and the working voltage measurement interface 2.

[0032] Furthermore, the signal display device in the parallel port information output unit 3 is a signal light or a display screen.

[0033] The beneficial effects of the track circuit reader test interface adapter device described in this utility model are as follows:

[0034] 1. Based on the existing TCR equipment testing items, the performance of the receiving coil can be tested through the coil signal interface of the adapter of this utility model, and the specific operating voltage of the TCR host can be tested through the operating voltage measurement interface;

[0035] 2. If other TCR testing instruments are subsequently added, an adapter can be used to access the external input / output interfaces, enabling more specific performance testing of the TCR host.

[0036] 3. This adapter is equipped with a light color display. When the ground is issuing codes for the loop, the user does not need to go to the DMI interface in the cab to check the light color. They can directly check whether the lights are on correctly through the adapter. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the internal structure of the track circuit reader;

[0038] Figure 2 A schematic diagram showing the connection between the track circuit reader test interface adapter and the track circuit reader;

[0039] Figure 3 A schematic diagram of the test interface adapter for the track circuit reader;

[0040] Figure 4 This is a schematic diagram of the overall structure of the shell;

[0041] Figure 5 A schematic diagram of the openings on the upper surface of the shell;

[0042] Figure 6 Diagram of a banana-shaped socket;

[0043] Figure 7 This is a schematic diagram of the circuit board structure.

[0044] In the diagram, 1 is the coil signal interface; 2 is the working voltage measurement interface; 3 is the parallel port information output section; 4 is the external input / output signal test interface module; 5 is the DB15 connector; 6 is the housing; 7 is the circuit board; 6-1 is the round hole; 6-2 is the square hole. Detailed Implementation

[0045] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present utility model can be combined with each other.

[0046] In existing technologies, the main reason users do not comprehensively test the performance parameters of the TCR main unit is the limited and difficult testing methods. The TCR main unit test board is equipped with a test interface X5, which uses a DB15 connector. The test interface signals include coil signals, power signals, and CAN signals. The TCR main unit test interface uses CAN communication; however, parsing CAN communication requires specific analysis software, making on-board testing impossible. Therefore, referring to… Figures 2 to 7 This embodiment specifically describes the track circuit reader test interface adapter, which includes: an external input / output signal test interface module 4, a housing 6, and a circuit board 7.

[0047] The external input / output signal test interface module 4 includes: coil signal interface 1, working voltage measurement interface 2, and parallel port information output unit 3.

[0048] The coil signal interface 1 includes: A coil signal A+ and A- interfaces, and B coil signal B+ and B- interfaces.

[0049] The operating voltage measurement interface 2 includes 24V+ and 24V- interfaces for measuring the 24V operating voltage of the TCR host.

[0050] The parallel port information output unit 3 includes four signal output interfaces and eight signal display devices. The four signal output interfaces are: speed level 1 output interface SD1, speed level 2 output interface SD2, speed level 3 output interface SD3, and insulation joint output interface JYJ. The eight signal display devices are: green signal display device L, green-yellow signal display device LU, yellow signal display device U, yellow signal 2 lamp U2, red-yellow signal display device HU, double yellow signal display device UU, red signal display device H, and white signal display device B.

[0051] like Figure 4 As shown, the housing 6 is rectangular and made of aluminum. A circular hole 6-1 is formed on the front surface of the housing 6. The connecting wire of the DB15 connector 5 passes through this hole 6-1 into the housing 6, inputting the signal from the DB15 connector 5 to the circuit board 7 inside the housing 6. The circuit board 7 is fixed to the housing 6 with screws via mounting holes 3-1. A square hole 6-2 is formed on the rear surface of the housing 6, and the external input / output signal interface 4 is embedded in this square hole 6-2.

[0052] like Figure 5 As shown, the upper surface of the housing 6 has two sets of through holes. A banana plug is installed in the first set of through holes, allowing users to easily insert a multimeter or other testing instruments. Figure 6 As shown; the second set of through holes is used to install signal display devices.

[0053] The external input / output signal test interface module 4 and the circuit board 7 are both located inside the housing 6.

[0054] Circuit board 7 includes: a power conversion module, a CAN isolation transceiver module, an MCU, an optocoupler, and a dual-row pin signal input / output interface module.

[0055] The 24V power output from the TCR host is supplied to the CAN isolation transceiver module, MCU and optocoupler through the power conversion module, and is also directly input to the optocoupler at the same time.

[0056] The CAN isolation transceiver module is a composite device that integrates an isolation power supply, a digital isolator, and a CAN transceiver. This module converts the MCU output into a differential signal and connects it to the CAN bus of DB15 connector 5. At the same time, it converts the CAN signal received from DB15 connector 5 into a logic level input to the MCU.

[0057] The MCU is used to convert the received CAN information into parallel port information and input it to the optocoupler.

[0058] An optocoupler, also known as an opto-isolator or optocoupler, is a device that uses light to transmit electrical signals and convert levels. Its working principle is based on the photoelectric effect: when an electrical signal is applied to the input terminal, the light emitter, usually an LED, emits light, and the light receiver, usually a phototransistor or photodiode, receives the light and generates a photocurrent, thereby realizing the transmission and conversion of the electrical signal. This embodiment converts a 3.3V signal to a 24V signal; it is also connected to an external input / output signal test interface module 4, which then outputs the parallel port information converted by the MCU through the external input / output signal test interface module 4.

[0059] The dual-row pin signal input / output interface module includes: coil signal interface 1, working voltage measurement interface 2, parallel port information output section 3, CAN signal interface, uplink signal input interface SX, downlink signal input interface XX, forced A-machine signal input interface, and forced B-machine signal input interface.

[0060] In summary, the track circuit reader test interface adapter device described in this embodiment has the following specific structure: The track circuit reader test interface adapter device described in this embodiment includes: an external input / output signal test interface module 4, a housing 6, and a circuit board 7;

[0061] The circuit board 7 includes: a power conversion module, a CAN isolation transceiver module, an MCU, an optocoupler, and a dual-row pin signal input / output interface module.

[0062] The power input terminal of the power conversion module is connected to the power supply of the track circuit reader via DB15 connector 5. The power output terminal of the power conversion module is connected to the voltage interfaces of the CAN isolation transceiver module, the MCU power input terminal, and the optocoupler input terminal, respectively. The voltage interface of the optocoupler input terminal is used to control the conduction of the optocoupler. The voltage interface of the optocoupler output terminal is connected to the power supply of the track circuit reader via DB15 connector 5. The CAN signal input / output terminal of the CAN isolation transceiver module is connected to the CAN bus of DB15 connector 5. The logic level input / output terminal of the CAN isolation transceiver module is connected to the logic level input / output terminal of the MCU. The parallel port information input / output terminal of the MCU is connected to the parallel port information input / output terminal of the optocoupler. The optocoupler outputs or receives signals through the dual-row pin signal input / output interface module. The optocoupler also outputs signals through the external input / output signal test interface module 4.

[0063] Furthermore, the aforementioned external input / output signal test interface module 4 and the dual-row pin signal input / output interface module both include: coil signal interface 1, working voltage measurement interface 2, and parallel port information output unit 3. The dual-row pin signal input / output interface module also includes: uplink signal input interface SX, downlink signal input interface XX, forced A-machine signal input interface, and forced B-machine signal input interface.

[0064] The coil signal interface 1 is connected to the coil signal interface of the track circuit reader via the DB15 connector 5;

[0065] The working voltage measurement interface 2 is connected to the working power supply of the track circuit reader through the DB15 connector 5;

[0066] The parallel port information output terminal of the optocoupler is connected to the parallel port information output unit 3;

[0067] The uplink signal input terminal of the optocoupler is connected to the uplink signal input interface SX;

[0068] The downlink signal input terminal of the optocoupler is connected to the downlink signal input interface XX;

[0069] The forced A-machine signal input terminal of the optocoupler is connected to the forced A-machine signal input interface;

[0070] The forced B-mode signal input terminal of the optocoupler is connected to the forced B-mode signal input interface.

[0071] Furthermore, the aforementioned coil signal interface 1 includes: an A coil signal interface and a B coil signal interface.

[0072] The A coil signal interface is connected to the A coil signal interface of the track circuit reader via the DB15 connector 5.

[0073] The B coil signal interface is connected to the B coil signal interface of the track circuit reader via the DB15 connector 5.

[0074] Furthermore, the aforementioned operating voltage measurement interface 2 includes: a 24V+ interface and a 24V- interface.

[0075] The 24V+ interface is connected to the 24V+ interface of the track circuit reader's power supply via the DB15 connector 5, and the 24V- interface is connected to the 24V- interface of the track circuit reader's power supply via the DB15 connector 5.

[0076] Furthermore, the aforementioned parallel port information output unit 3 includes: speed level 1 output interface SD1, speed level 2 output interface SD2, speed level 3 output interface SD3, insulating joint output interface JYJ, green signal display device L, green-yellow signal display device LU, yellow signal display device U, yellow signal 2 lamp U2, red-yellow signal display device HU, double yellow signal display device UU, red signal display device H, and white signal display device B;

[0077] The speed level 1 output terminal, speed level 2 output terminal, speed level 3 output terminal, and insulating joint output terminal of the optocoupler are respectively connected to the speed level 1 output interface SD1, the speed level 2 output interface SD2, the speed level 3 output interface SD3, and the insulating joint output interface JYJ.

[0078] The green light signal output terminal, green-yellow light signal output terminal, yellow light signal output terminal, red-yellow light signal output terminal, double yellow light signal output terminal, red light signal output terminal, and white light signal output terminal of the optocoupler are respectively connected to the green signal display device L, green-yellow signal display device LU, yellow signal display device U, yellow signal 2 lamp U2, red-yellow signal display device HU, double yellow signal display device UU, red signal display device H, and white signal display device B.

[0079] In this embodiment, the signal display device is an LED signal light or a display screen.

[0080] The housing 6 has a cubic structure. Circular holes 6-1 and square holes 6-2 are respectively opened on the front and rear surfaces of the housing 6. Multiple embedding holes are opened on the upper surface of the housing 6. The external input / output signal test interface module 4 and the circuit board 7 are both located inside the housing 6. The cable of the DB15 connector 5 extends into the housing 6 through the circular hole 6-1. The dual-row pin signal input / output interface module is embedded in the square hole 6-2. The coil signal interface 1, working voltage measurement interface 2, and parallel port information output section 3 of the external input / output signal test interface module 4 correspond one-to-one with the embedding holes and are embedded in the corresponding embedding holes.

[0081] Furthermore, banana-shaped sockets are provided in the corresponding embedding holes of the coil signal interface 1 and the working voltage measurement interface 2.

[0082] In summary, the track circuit reader test interface adapter described in this embodiment, equipped with eight signal display devices, can display the TCR host decoder output light colors, eliminating the need for the user to observe the light color information through the DMI (Human-Machine Interface). A multimeter can be directly connected to the test interface adapter to measure the TCR host operating voltage, such as the 24V+ and 24V- interfaces. A multimeter or LCR meter can be directly connected to the coil signal interface 1 of the adapter to measure the DC resistance, inductance, and quality factor of the A / B coils. The adapter converts all the signals and CAN information contained in the original DB15 connector 5 into parallel port information signals, allowing users to directly use the signals output by the test interface adapter when testing with other TCR testing instruments, thus offering wide versatility.

[0083] While specific embodiments of the present invention have been described herein with reference to them, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. A track circuit reader test interface adapter, characterized in that, include: External input / output signal test interface module (4) and circuit board (7); The circuit board (7) includes: a CAN isolation transceiver module, an MCU, an optocoupler, and a dual-row pin signal input / output interface module; The CAN signal input / output terminal of the CAN isolation transceiver module is used to connect to the CAN bus of the DB15 connector (5). The logic level input / output terminal of the CAN isolation transceiver module is connected to the logic level input / output terminal of the MCU. The parallel port information input / output terminal of the MCU is connected to the parallel port information input / output terminal of the optocoupler. The optocoupler outputs or receives signals through the dual-row pin signal input / output interface module. The optocoupler also outputs signals through the external input / output signal test interface module (4).

2. The rail circuit reader test interface adapter of claim 1, wherein, The circuit board (7) further includes a power conversion module, the power input terminal of which is connected to the power supply of the track circuit reader via a DB15 connector (5), the power output terminal of which is connected to the voltage interface of the CAN isolation transceiver module, the MCU power input terminal, and the optocoupler input terminal, respectively, and the voltage interface of the optocoupler output terminal is connected to the power supply of the track circuit reader via a DB15 connector (5).

3. The track circuit reader test interface adapter of claim 1 or 2, characterized in that, The external input / output signal test interface module (4) and the dual-row pin signal input / output interface module both include: coil signal interface (1), working voltage measurement interface (2) and parallel port information output unit (3). The dual-row pin signal input / output interface module also includes: uplink signal input interface SX, downlink signal input interface XX, forced A machine signal input interface and forced B machine signal input interface. The coil signal interface (1) is connected to the coil signal interface of the track circuit reader via the DB15 connector (5); The working voltage measurement interface (2) is connected to the working power supply of the track circuit reader through the DB15 connector (5); The parallel port information output terminal of the optocoupler is connected to the parallel port information output unit (3); The uplink signal input terminal of the optocoupler is connected to the uplink signal input interface SX; The downlink signal input terminal of the optocoupler is connected to the downlink signal input interface XX; The forced A-machine signal input terminal of the optocoupler is connected to the forced A-machine signal input interface; The forced B-mode signal input terminal of the optocoupler is connected to the forced B-mode signal input interface.

4. The rail circuit reader test interface adapter of claim 3, wherein, The coil signal interface (1) includes: coil signal interface A and coil signal interface B. The A coil signal interface is connected to the A coil signal interface of the track circuit reader via the DB15 connector (5). The B coil signal interface is connected to the B coil signal interface of the track circuit reader via the DB15 connector (5).

5. The rail circuit reader test interface adapter of claim 3, wherein, The operating voltage measurement interface (2) includes: a 24V+ interface and a 24V- interface. The 24V+ interface is connected to the 24V+ interface of the track circuit reader's operating power supply via the DB15 connector (5), and the 24V- interface is connected to the 24V- interface of the track circuit reader's operating power supply via the DB15 connector (5).

6. The rail circuit reader test interface adapter of claim 3, wherein, The parallel port information output unit (3) includes: speed level 1 output interface SD1, speed level 2 output interface SD2, speed level 3 output interface SD3, insulating joint output interface JYJ, green signal display device L, green-yellow signal display device LU, yellow signal display device U, yellow signal 2 lamp U2, red-yellow signal display device HU, double yellow signal display device UU, red signal display device H and white signal display device B; The speed level 1 output terminal, speed level 2 output terminal, speed level 3 output terminal, and insulating joint output terminal of the optocoupler are respectively connected to the speed level 1 output interface SD1, the speed level 2 output interface SD2, the speed level 3 output interface SD3, and the insulating joint output interface JYJ. The green light signal output terminal, green-yellow light signal output terminal, yellow light signal output terminal, red-yellow light signal output terminal, double yellow light signal output terminal, red light signal output terminal, and white light signal output terminal of the optocoupler are respectively connected to the green signal display device L, green-yellow signal display device LU, yellow signal display device U, yellow signal 2 lamp U2, red-yellow signal display device HU, double yellow signal display device UU, red signal display device H, and white signal display device B.

7. The rail circuit reader test interface adapter of claim 6, wherein, It also includes a housing (6), which has a cubic structure. The front and rear surfaces of the housing (6) are respectively provided with a round hole (6-1) and a square hole (6-2). The upper surface of the housing (6) is provided with multiple insertion holes. The external input / output signal test interface module (4) and circuit board (7) are both located inside the housing (6).

8. The rail circuit reader test interface adapter of claim 7, wherein, The cable of the DB15 connector (5) extends into the housing (6) through the circular hole (6-1). The dual-row pin signal input / output interface module is embedded in the square hole (6-2). The coil signal interface (1), working voltage measurement interface (2), and parallel port information output unit (3) of the external input / output signal test interface module (4) correspond one-to-one with the embedding holes and are embedded in the corresponding embedding holes.

9. The rail circuit reader test interface adapter of claim 8, wherein, Banana sockets are provided in the corresponding embedding holes of the coil signal interface (1) and the working voltage measurement interface (2).

10. The rail circuit reader test interface adapter of claim 6, wherein, The signal display device in the parallel port information output unit (3) is a signal light or a display screen.

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