Turnout control device for rail transit practical training system

Abstract

The utility model discloses a turnout control device for a rail transit practical training system. Characterized in that; the turnout control device comprises an ESP32 micro-control chip integrating Wi-Fi and Bluetooth, a turnout driving circuit, a turnout indication circuit, an RS485 interface circuit, an XpressNet interface circuit, a turnout indication circuit, a turnout on-site operation circuit and a power supply circuit. The ESP32 micro-control chip is in butt joint with a railway model turnout device through the turnout driving circuit and the turnout indication circuit, and the ESP32 micro-control chip is further connected with the RS485 interface circuit, the XpressNet interface circuit, the turnout indication circuit, the turnout on-site operation circuit and the power supply circuit. The device can effectively solve the turnout control defects of a virtual simulation system in the existing rail transit industry, realizes the consistency of turnout control and a rail transit operation site, can accurately give out turnout position signals, can communicate with an upper computer railway signal simulation system through various interfaces, and has the advantages of high reliability and high reliability. Interlocking control among the signal machine, the route and the turnout is realized.

Description

Technical Field

[0001] The utility model relates to the field of rail transit training, in particular to a turnout control device for a rail transit training system. Background Art

[0002] Railway models are scale models of railways, usually made in proportion to the real size. Railway models include railway-related objects and environments, such as locomotives, trains, tracks, signal systems, etc. Since it can not only ensure the same simulation as the real object, but also perform dynamic operation, it is widely used in rail transit operation simulation sandbox systems and rail transit teaching-related training systems. In the current railway models, the railway turnout track and the switch machine are combined into an electric turnout device, such as Figure 1 As shown in the figure, the turnout track is driven by the switch machine to realize the conversion from the fixed position to the reverse position or from the reverse position to the fixed position, thereby switching the opening direction of the railway track. The action control of the switch machine in the model is generally manually operated using a single-pole double-throw knife switch, such as Figure 2 shown.

[0003] At present, the manual operation mode of the electric turnout device in the railway model is not only inconsistent with the rail transit operation site, but also cannot give the current position of the turnout (position or reverse position), and thus cannot communicate with the host railway signal simulation system to realize the interlocking control between the signal machine, the approach and the turnout. These defects seriously limit the simulation and practicality of the rail transit operation simulation sandbox system and the rail transit teaching and training system built based on the railway model. Utility Model Content

[0004] Therefore, in order to solve the above-mentioned shortcomings, the utility model provides a turnout control device for a rail transit training system. At present, the construction of rail transit operation simulation sandbox and rail transit teaching and training equipment based on railway models is the main implementation scheme of the virtual simulation system in the rail transit industry. This device can effectively solve the turnout control defects of the virtual simulation system in the current rail transit industry, realize the consistency of turnout control with the rail transit operation site, accurately give the turnout position signal, and communicate with the host computer railway signal simulation system through multiple interfaces to realize the interlocking control between signal machines, routes and turnsouts.

[0005] The utility model is implemented in this way, constructing a turnout control device for a rail transit training system, characterized in that: the turnout control device comprises an ESP32 microcontroller chip integrated with Wi-Fi and Bluetooth, a turnout drive circuit, a turnout display circuit, an RS485 interface circuit, an XpressNet interface circuit, a turnout indication circuit, a turnout local operation circuit and a power supply circuit; the ESP32 microcontroller chip is connected to a railway model turnout device via the turnout drive circuit and the turnout display circuit, and the ESP32 microcontroller chip is also connected to the RS485 interface circuit, the XpressNet interface circuit, the turnout indication circuit, the turnout local operation circuit and the power supply circuit respectively.

[0006] Among them; the ESP32 microcontroller chip communicates with the host computer railway signal simulation system on the one hand to complete the interlocking control and turnout position detection and status feedback of the railway model turnout device, and on the other hand also realizes the on-site display and manual operation of the turnout status.

[0007] Among them; the turnout drive circuit and turnout indication circuit are designed with reference to the real equipment on site, and are equipped with functional components such as action power electronic switch, indication power electronic switch, action time limit protection, turnout position detection, etc., to realize the interlocking control and turnout position indication of the turnout.

[0008] The on-site switch operation circuit simulates the emergency handling of the switch interlocking control failure at the rail transit operation site, which requires the joint authorization of the train personnel and the electrician to complete the manual switch. The circuit is mainly realized by the micro rocker and variable resistor of the simulated switch machine hand crank. The ESP32 microcontroller chip monitors the change of the variable resistor resistance through AD conversion and detects the action of the micro rocker, thereby simulating the manual switch operation of the switch.

[0009] Among them; the turnout indication circuit is realized by a 0.91-inch blue OLED screen with a resolution of 128*32, which graphically and dynamically displays the turnout position and turnout number information under the control of the ESP32 microcontroller chip.

[0010] The RS485 interface circuit is one of the communication interfaces between the device and the host railway signal simulation system, and the communication with the RS485 interface circuit realizes the interlocking control of the railway model switch device. The interface driver chip used in the circuit is Shanghai Belling BL1590, which is a high-speed RS-485 transceiver powered by a wide power supply of 3V to 5.5V, with a transmission rate of up to 16Mbps, hot-swap support, and built-in over-current and over-temperature protection circuits.

[0011] Among them; the XpressNet interface circuit is part of the digital control system of the train model, which fully complies with the NMRA technical specifications. Only by inserting the XpressNet connecting line can the digital handle control the operation of the turnout.

[0012] The power supply circuit provides the device with switch machine action power supply (14V), turnout indication power supply (5V) and working power supply (3.3V). The circuit is mainly composed of a power reverse connection protection circuit and a step-up and step-down DC-DC conversion circuit. The step-down DC-DC conversion circuit uses the MT2492 power chip, the step-up DC-DC conversion circuit uses the MT3608 power chip, and the power reverse connection protection circuit uses a PMOS anti-reverse connection protection circuit.

[0013] The utility model has the following advantages: the device is highly efficient and reliable, has low economic cost, is highly versatile, and can realize the interlocking control of the railway model turnout device and has the characteristics of turnout fixed (reverse) position indication. (1) The device is designed with reference to the real equipment on site, and can realize the interlocking control of the turnout device and the turnout position indication. (2) The device has multiple communication interfaces such as WiFi interface and RS485 interface, and can flexibly communicate and exchange data with the host computer railway signal simulation system. (3) The device can realize the manual operation of the turnout and the turnout position indication on site, meeting the emergency handling requirements of the turnout device in the rail transit industry. (4) The device has an XpressNet interface, which complies with the NMRA technical specifications and can realize the operation control of the turnout by a digital handle. (5) The device is powered by a single 5V power supply, and the internal boost generates the operating power supply of the switch machine. The device is simple and easy to maintain. (6) The device has a turnout indication circuit, which displays the turnout position and turnout number information in real time through the OLED screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Railway model turnout device diagram;

[0015] Figure 2 Railway model switch machine control wiring diagram;

[0016] Figure 3 System block diagram of turnout control device;

[0017] Figure 4 Turnout drive circuit diagram;

[0018] Figure 5 Turnout representation circuit diagram;

[0019] Figure 6 Power supply circuit block diagram;

[0020] Figure 7 Power reverse connection protection circuit diagram;

[0021] Figure 8 Schematic diagram of turnout track on railway model;

[0022] Fig. 9 Electrical schematic diagram of railway model switch machine;

[0023] Fig.10 Schematic diagram of the switch control device wiring.

[0024] Among them: ESP32 microcontroller chip 1, turnout drive circuit 2, turnout indication circuit 3, RS485 interface circuit 4, XpressNet interface circuit 5, turnout indication circuit 6, turnout local operation circuit 7 and power supply circuit 8. DETAILED DESCRIPTION

[0025] The following will be combined with the attached Figure 1-Figure 10 The utility model is described in detail, and the technical solutions in the embodiments of the utility model are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] The utility model provides a turnout control device for a rail transit training system through improvement. At present, the construction of rail transit operation simulation sandbox and rail transit teaching and training equipment based on railway models is the main implementation scheme of the virtual simulation system in the rail transit industry. The device can effectively solve the turnout control defects of the virtual simulation system in the current rail transit industry, realize the consistency of turnout control with the rail transit operation site, accurately give turnout position signals, communicate with the upper computer railway signal simulation system through multiple interfaces, and realize the interlocking control between signal machines, routes and turnsouts.

[0027] The present application is described in detail below; the switch control device comprises an ESP32 microcontroller chip 1 with integrated Wi-Fi and Bluetooth, a switch drive circuit 2, a switch indication circuit 3, an RS485 interface circuit 4, an XpressNet interface circuit 5, a switch indication circuit 6, a switch local operation circuit 7 and a power supply circuit 8; the ESP32 microcontroller chip 1 is connected to the railway model switch device via the switch drive circuit 2 and the switch indication circuit 3, and the ESP32 microcontroller chip 1 is also connected to the RS485 interface circuit 4, the XpressNet interface circuit 5, the switch indication circuit 6, the switch local operation circuit 7 and the power supply circuit 8 respectively.

[0028] During implementation, the device is designed based on the electrical characteristic parameters of the switch machine in the railway model switch device and with reference to the actual equipment on site. It uses the ESP32 microcontroller chip 1 with integrated Wi-Fi and Bluetooth, and multiple electronic circuits including the switch drive circuit 2, switch indication circuit 3, RS485 interface circuit 4, XpressNet interface circuit 5, switch indication circuit 6, switch local operation circuit 7, and power supply circuit 8. The system block diagram is shown in the figure below. Figure 3 Each component module is described in detail below.

[0029] 1. The main electrical characteristic parameters of the railway model switch machine driven by this device:

[0030] (1) Action power supply: 12~16V (DC / AC);

[0031] (2) Action current: about 1A;

[0032] (3) Action time: about 0.5s.

[0033] 2. ESP32 microcontroller chip 1:

[0034] The ESP32 microcontroller chip 1 adopts a 40nm process, a dual-core 32-bit MCU, a 2.4GHz dual-mode Wi-Fi and Bluetooth chip, a main frequency of up to 230mHz, a computing power of up to 600DMIPS, and supports multiple communication protocols such as I2C, I2S, SPI, UART, CAN, etc. It has ultra-high radio frequency performance, stability, versatility and reliability. In this device, the ESP32 microcontroller chip (1) is a system controller. On the one hand, it communicates with the host computer railway signal simulation system to complete the interlocking control of the railway model turnout device and the turnout position detection and status feedback. On the other hand, it also realizes the on-site display and manual operation of the turnout status.

[0035] 3. Turnout drive circuit 2:

[0036] Turnout drive circuit 2 Figure 4As shown, the design is based on the actual equipment on site. It is equipped with an action power electronic switch and action time limit protection. The host computer railway signal simulation system sends commands to the ESP32 microcontroller chip 1 through the RS485 or Wi-Fi communication interface. The ESP32 microcontroller chip 1 controls the turnout drive circuit 2 to drive the railway model switch machine to move, and then the railway model turnout device performs positioning to reverse position (or reverse position to positioning) conversion to realize the opening of the turnout track for different driving directions. The turnout drive circuit 2 includes an action power electronic switch (Q4, Q7), a positioning to reverse position electronic switch (Q10), and a reverse position to positioning electronic switch (Q12). The Q4 adopts the HSS2P10 field effect tube (100V / 2A, P channel), and Q7, Q10, and Q12 adopt the NCE0102 field effect tube (100V / 2A, N channel). The turnout drive circuit 2 uses electronic switches Q10 and Q12 to replace the single-pole double-throw knife switch in the railway model. Under the control of the upper computer railway signal simulation system, the switching operation of the railway model turnout device can be automatically completed without human intervention.

[0037] 4. Turnout indication circuit 3:

[0038] Turnout indication circuit 3 Figure 5 As shown, the design is based on the actual equipment on site. It is equipped with an electronic switch for indicating power supply and a switch position detection, which cooperates with the electromagnetic coil and sliding contact group inside the railway model switch machine to monitor the position state (position or reverse position) of the railway model switch device in real time. After being processed by the ESP32 microcontroller chip 1, it is uploaded to the upper computer railway signal simulation system through the RS485 or Wi-Fi communication interface to realize the interlocking control between the signal machine, the approach and the switch. The switch indication circuit 3 includes an electronic switch for indicating power supply (Q2, Q6, D13), a switch positioning indication collection (R89, R93), and a switch reverse position indication collection (R107, R109). The Q2 adopts the HSS2P10 field effect tube (100V / 2A, P channel), and the Q6 adopts the NCE0102 field effect tube (100V / 2A, N channel).

[0039] 5. RS485 interface circuit 4:

[0040] RS485 interface circuit 4 is one of the communication interfaces between this device and the host computer railway signal simulation system, and the communication with it realizes the interlocking control of the railway model switch device. The interface driver chip used in the circuit is Shanghai Belling BL1590, which is a high-speed RS-485 transceiver powered by a 3V~5.5V wide power supply, with a transmission rate of up to 16Mbps, supports hot plug function, and has built-in over-current and over-temperature protection circuits.

[0041] 6. XpressNet interface circuit 5:

[0042] The XpressNet interface circuit 5 provided by the device is a part of the digital control system of the train model and fully complies with the NMRA technical specifications. Only by inserting the XpressNet connection line, the operation control of the turnout by the digital handle can be realized.

[0043] 7. Turnout indication circuit 6:

[0044] The turnout indication circuit 6 is implemented by a 0.91-inch blue OLED screen with a resolution of 128*32, which graphically and dynamically displays the turnout position and turnout number information under the control of the ESP32 microcontroller chip 1.

[0045] 8. Turnout local operation circuit 7:

[0046] The turnout local operation circuit 7 simulates the emergency handling of the turnout interlocking control failure at the rail transit operation site, which requires the joint authorization of the train personnel and the electrician to complete the manual conversion of the turnout. The circuit is mainly implemented by a micro rocker and a variable resistor that simulates the hand crank of the switch machine. The ESP32 microcontroller chip 1 monitors the change of the variable resistor resistance through AD conversion and detects the action of the micro rocker, thereby simulating the manual conversion operation of the turnout.

[0047] 9. Power circuit 8:

[0048] The power supply circuit 8 provides the device with switch machine action power supply (14V), turnout indication power supply (5V) and working power supply (3.3V). The circuit is mainly composed of a power reverse connection protection circuit and a step-up and step-down DC-DC conversion circuit. Figure 6 The step-down DC-DC conversion circuit uses the MT2492 power chip, the step-up DC-DC conversion circuit uses the MT3608 power chip, and the power reverse connection protection circuit uses the PMOS anti-reverse connection protection circuit. Figure 7 shown.

[0049] The present application has the following technical effects: the device is highly efficient and reliable, has low economic cost, strong versatility, can realize the interlocking control of the railway model turnout device and has the characteristics of turnout fixed (reverse) position indication, etc.

[0050] (1) This device is designed with reference to the actual equipment on site and can realize the interlocking control of the turnout device and the turnout position indication.

[0051] (2) This device has multiple communication interfaces such as WiFi interface and RS485 interface, which can flexibly communicate and exchange data with the host railway signal simulation system.

[0052] (3) This device can realize manual operation of turnouts and turnout position indication on site, meeting the emergency handling requirements of turnout devices in the rail transit industry.

[0053] (4) This device has an XpressNet interface, complies with NMRA technical specifications, and can realize the operation and control of the turnout by a digital handle.

[0054] (5) This device is powered by a single 5V power supply, and the internal booster generates the operating power supply for the switch machine. The equipment is simple and easy to maintain.

[0055] (6) This device has a turnout indication circuit, which displays the turnout position and turnout number information in real time through the OLED screen.

[0056] The following is an explanation of the railway model turnout device involved in this application.

[0057] like Figure 8 Shown

[0058] The railway model turnout track is mainly composed of mechanical parts such as the base rail, the point rail and the connecting rod. Under the traction of the switch machine, the turnout track drives the point rail to move up and down in the base rail through the connecting rod, thereby opening different driving directions of the model track: A track (positioning) or B track (reverse position).

[0059] like Fig. 9 Shown

[0060] The circuit part of the railway model switch machine is generally realized by electromagnetic principle, which consists of two electromagnetic coils (A, B) and sliding contact group (A, B), and three control connection lines are led out:

[0061] (1) A - Solenoid coil A control wire (red);

[0062] (2) B - Solenoid coil B control wire (black);

[0063] (3) C - Solenoid coil control common (green).

[0064] The operating power supply of the railway model switch is generally 12V~16V (1A), and a single-pole double-throw knife switch is generally used as the operating controller. When the knife switch is thrown to the left (or right), the electromagnetic coil A (or B) inside the switch obtains the operating power supply to generate electromagnetic force, and drives the external turnout track to switch from positioning to reverse position (or reverse position to positioning) through the mechanical mechanism, and also drives the internal sliding contact group B to switch from A to B (or A to B to B); the switching change of the sliding contact group cuts off the operating power supply circuit of the electromagnetic coil A (or B) on the one hand, and prepares the operating power supply circuit for the electromagnetic coil B (or A) on the other hand.

[0065] like Fig.10 As shown:

[0066] The switch machine action interface (CN34) terminal of the switch drive circuit 2 and the switch indication interface (CN30) terminal of the switch indication circuit 3 of this device are connected in parallel with the three lead wires A, B and C of the switch machine in the railway model switch device according to the A, B and C number classification. The rated current carrying capacity of the cables and wires used for the connection is required to be greater than 1.5A.

[0067] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those 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 will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A turnout control device for a rail transit training system, characterized in that; The switch control device comprises an ESP32 microcontroller chip (1) with integrated Wi-Fi and Bluetooth, a switch drive circuit (2), a switch indication circuit (3), an RS485 interface circuit (4), an XpressNet interface circuit (5), a switch indication circuit (6), a switch local operation circuit (7) and a power supply circuit (8); the ESP32 microcontroller chip (1) is connected to the railway model switch device via the switch drive circuit (2) and the switch indication circuit (3); the ESP32 microcontroller chip (1) is also connected to the RS485 interface circuit (4), the XpressNet interface circuit (5), the switch indication circuit (6), the switch local operation circuit (7) and the power supply circuit (8).

2. A turnout control device for a rail transit training system according to claim 1, characterized in that; The switch drive circuit (2) and the switch indication circuit (3) are composed of an action power electronic switch, an indication power electronic switch, an action time limit protection, and a switch position detection component.

3. A turnout control device for a rail transit training system according to claim 1, characterized in that; The switch local operation circuit (7) is mainly implemented by a micro rocker and a variable resistor that simulates the hand crank of the switch machine. The ESP32 microcontroller chip (1) monitors the change in resistance of the variable resistor through AD conversion and detects the movement of the micro rocker, thereby simulating the manual switching operation of the switch.

4. A turnout control device for a rail transit training system according to claim 1, characterized in that; The switch indication circuit (6) is implemented by a 0.91-inch blue OLED screen with a resolution of 128*32, which graphically and dynamically displays the switch position and switch number information under the control of the ESP32 microcontroller chip (1).

5. The turnout control device for a rail transit training system according to claim 1, characterized in that: The RS485 interface circuit (4) is implemented using the Shanghai Belling BL1590 interface driver chip.

6. A turnout control device for a rail transit training system according to claim 1, characterized in that: The power supply circuit (8) is mainly composed of a power supply reverse connection protection circuit and a step-up and step-down DC-DC conversion circuit. The step-down DC-DC conversion circuit adopts an MT2492 power supply chip, the step-up DC-DC conversion circuit adopts an MT3608 power supply chip, and the power supply reverse connection protection circuit adopts a PMOS anti-reverse connection protection circuit.

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