Subway current collection trolley electric cabinet unit control device

Abstract

The utility model discloses an electric control box unit control device for a subway current collection trolley, which relates to the field of current collection trolleys and comprises a power supply module, a control module and a power supply module, the input and output terminal module is used for introducing an input signal through an integrated terminal and outputting the input signal to the signal input module and the signal isolation module; the signal input module is used for receiving the power supply condition on the cable detected by the input and output terminal module through the current transformer and outputting a detection signal to the main control module through the signal isolation module; compared with the prior art, the beneficial effects of the utility model are that the switching-on and switching-off control of the current collection dolly is realized with low cost, and the switching-on and switching-off control is reliable and effective; and meanwhile, the problems of real-time monitoring of internal key electrical parameters and fault information transmission are solved, the working efficiency is improved, the climbing risk of personnel is reduced, the blank of the type of device is filled, and the actual demand use is met.

Description

Technical Field

[0001] The utility model relates to the field of power collection trolleys, in particular to an electric control box unit control device for a subway power collection trolley. Background Art

[0002] The current collector trolley in a subway system collects electrical energy from the busbar conductor and transmits it to the train via cables. It consists of a current collector, an electrical control box, an operating controller, and cables. The unit control device, a control panel within the trolley's electrical control box, is primarily responsible for integrating and controlling signals such as closing, BD terminal coupling, opening, light strip control, contactor control, and current transformer input to ensure operational safety.

[0003] The key electrical parameters inside the existing collector vehicle electrical control box unit control device cannot be monitored in real time, and fault information cannot be transmitted, which needs to be improved. Utility Model Content

[0004] The purpose of the utility model is to provide a control device for an electric control box unit of a subway power collection trolley to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A control device for an electric control box unit of a subway current collecting trolley, comprising:

[0007] Power supply module, used to convert AC power into DC power output;

[0008] Input and output terminal modules are used to introduce input signals through integrated terminals and output them to signal input modules and signal isolation modules;

[0009] The signal input module is used to receive the power supply status on the cable detected by the input and output terminal module through the current transformer, and output the detection signal to the main control module through the signal isolation module;

[0010] The signal isolation module is used to isolate the external input signal and output it to the main control module to avoid damage to the main control module;

[0011] The opening and closing signal module is used to output the opening signal and closing signal as input signals to the input and output terminal module;

[0012] 485 communication module, used to build communication between the main control module and the host computer based on RS485 communication (short distance communication, connecting devices within the system);

[0013] LORA communication module, used to build communication between the main control module and the host computer based on LORA communication (long-distance communication, connecting non-system devices);

[0014] The main control module is used to receive signals and store fault information in the memory, and establish communication with the host computer through the 485 communication module, LORA communication module;

[0015] The power supply module is connected to the input and output terminal module, signal input module, signal isolation module, opening and closing signal module, 485 communication module, LORA communication module, and main control module. The opening and closing signal module is connected to the input and output terminal module. The input and output terminal module is connected to the signal input module and signal isolation module. The signal input module is connected to the main control module. The signal isolation module is connected to the main control module. The main control module is connected to the 485 communication module and LORA communication module.

[0016] As a further solution of the present invention: the signal input module includes an amplifier U20.1 and an amplifier U20.2, the non-inverting end of the amplifier U20.1 is connected to one end of the resistor R34, the other end of the resistor R34 is connected to one end of the resistor R35, one end of the resistor R30, and the current transformer signal, the other end of the resistor R30 is grounded, the inverting end of the amplifier U20.1 is connected to the cathode of the diode D2, one end of the resistor R33, the cathode of the diode D3, and one end of the resistor R36, the positive pole of the diode D2 is connected to the output end of the amplifier U20.1, the other end of the resistor R35 is connected to the other end of the resistor R36 and the inverting end of the amplifier U20.2, the non-inverting end of the amplifier U20.2 is grounded, the output end of the amplifier U20.2 is connected to the positive pole of the diode D3, the other end of the resistor R33 is connected to one end of the capacitor C20 and the main control module, and the other end of the capacitor C20 is grounded.

[0017] As a further solution of the present invention: the signal isolation module includes an integrated circuit U5 and an integrated circuit U6, the models of the integrated circuits U5 and U6 are ULN2003, pins 11, 14, 15, and 16 of the integrated circuit U5 are connected to the input and output terminal module, pins 12 and 13 of the integrated circuit U5 are connected to the opening and closing signal module, pins 1-6 of the integrated circuit U5 are connected to the main control module through an optocoupler and a resistor respectively; pins 1-4 of the integrated circuit U6 are connected to the input and output terminal module through a resistor respectively, and pins 13-16 of the integrated circuit U6 are connected to the main control module through a resistor and an optocoupler respectively.

[0018] As a further solution of the present invention: the opening and closing signal module includes relay K1 and relay K2. The models of relays K1 and K2 are G2R-1-DC24. Pin 5 of relay K1 is connected to the signal isolation module, pin 1 of relay K1 is connected to 24V voltage, pins 2-4 of relay K1 are connected to the input and output terminal module, pin 5 of relay K2 is connected to the signal isolation module, and pins 1-4 of relay K2 are connected to the input and output terminal module.

[0019] As a further solution of the present invention: the main control module includes a main control chip U4, the model of the main control chip U4 is STC8H1K16-361-LQFP32, pin 1 of the main control chip U4 is connected to the signal input module, pins 2-4 and 10-14 of the main control chip U4 are connected to the LORA communication module, pins 5-8, 17, 18, and 21-24 of the main control chip U4 are connected to the signal isolation module, and pins 9, 19, and 20 of the main control chip U4 are connected to the 485 communication module.

[0020] As a further solution of the present invention: the 485 communication module includes a communication chip U19, the model of the communication chip U19 is YD3082EESA, pins 1-4 of the communication chip U19 are connected to the main control module, and pins 6 and 7 of the communication chip U19 are connected to the host computer through the interface CN1.

[0021] As a further solution of the present invention: the LORA communication module includes a communication chip U21, the model of the communication chip U21 is E22-400T22S, pins 1-11 and 22 of the communication chip U21 are connected to the main control module, and pin 21 of the communication chip U21 is connected to the antenna L2.

[0022] Compared with the existing technology, the beneficial effects of the present invention are: the present invention realizes the opening and closing control of the collector trolley at a low cost, which is reliable and effective; at the same time, it solves the problems of real-time monitoring of internal key electrical parameters and fault information transmission, improves work efficiency, reduces the risk of personnel climbing, fills the gap in this type of device, and meets actual needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The following is a circuit diagram of a control device for an electric control box unit of a subway current collecting trolley. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] See also Figure 1 , a subway current collecting trolley electric control box unit control device, comprising:

[0026] Power supply module, used to convert AC power into DC power output;

[0027] Input and output terminal modules are used to introduce input signals through integrated terminals and output them to signal input modules and signal isolation modules;

[0028] The signal input module is used to receive the power supply status on the cable detected by the input and output terminal module through the current transformer, and output the detection signal to the main control module through the signal isolation module;

[0029] The signal isolation module is used to isolate the external input signal and output it to the main control module to avoid damage to the main control module;

[0030] The opening and closing signal module is used to output the opening signal and closing signal as input signals to the input and output terminal module;

[0031] 485 communication module, used to build communication between the main control module and the host computer based on RS485 communication (short distance communication, connecting devices within the system);

[0032] LORA communication module, used to build communication between the main control module and the host computer based on LORA communication (long-distance communication, connecting non-system devices);

[0033] The main control module is used to receive signals and store fault information in the memory, and establish communication with the host computer through the 485 communication module, LORA communication module;

[0034] The power supply module is connected to the input and output terminal module, signal input module, signal isolation module, opening and closing signal module, 485 communication module, LORA communication module, and main control module. The opening and closing signal module is connected to the input and output terminal module. The input and output terminal module is connected to the signal input module and signal isolation module. The signal input module is connected to the main control module. The signal isolation module is connected to the main control module. The main control module is connected to the 485 communication module and LORA communication module.

[0035] In the specific embodiment: see Figure 1 In the power supply module, the input 220V AC power is converted into DC24V by the voltage regulator chip LH25-13B24 as the main power supply of the control device. DC±15V and DC5V are converted from DC24V by the voltage regulator chips WRA2415S and IB2405S respectively.

[0036] In the input and output terminal module, since the current collector trolley has a large number of input signals, in order to ensure the reliability of the connection, an integrated terminal is used for input connection as much as possible. For this purpose, the SMS24GE4 connector is selected. The pins are gold-plated and wear-resistant and anti-oxidation, and the shell snap-on design makes the connection stable and not easy to loosen.

[0037] The input and output signals of terminal J1 are: J1-1\J1-2: AC220V input, J1-3: contactor power input, J1-4: contactor power output, J1-5: light strip power input, J1-6: white light strip power output, J1-7: red light strip power output, J1-8: NC, J1-9: GND, J1-10\J1-11: DC24V, J1-12: opening signal input, J1-1 3 / J1-18: GND, J1-14: D-terminal signal output, J1-15: RS485A, J1-16: B-terminal signal input, J1-17: current transformer input, J1-19: RS485B, J1-20: closing signal input, J1-22 / J1-21: DC±15V transformer power output, J1-23: second backup output, input J1-24: first backup input.

[0038] In this example: See Figure 1 The signal input module includes an amplifier U20.1 and an amplifier U20.2. The non-inverting end of the amplifier U20.1 is connected to one end of the resistor R34, the other end of the resistor R34 is connected to one end of the resistor R35, one end of the resistor R30, and the current transformer signal, the other end of the resistor R30 is grounded, the inverting end of the amplifier U20.1 is connected to the cathode of the diode D2, one end of the resistor R33, the cathode of the diode D3, and one end of the resistor R36, the positive electrode of the diode D2 is connected to the output end of the amplifier U20.1, the other end of the resistor R35 is connected to the other end of the resistor R36 and the inverting end of the amplifier U20.2, the non-inverting end of the amplifier U20.2 is grounded, the output end of the amplifier U20.2 is connected to the anode of the diode D3, the other end of the resistor R33 is connected to one end of the capacitor C20 and the main control module, and the other end of the capacitor C20 is grounded.

[0039] The current transformer is an external sensor for the unit control device, providing a DC±15V operating voltage through the control device via connectors (J1-21, J1-22). The current transformer model is LEM HTA100-S, and is primarily used to determine the power supply status of the DC1500 cable. In a power outage, the output voltage is typically non-zero due to the presence of induced voltage, but will be below a threshold. In the presence of power, the output voltage will be above this threshold. The output voltage can be both positive and negative, so the input detection of the current transformer signal considers the emitter follower and takes into account the output of negative voltage. The current transformer detection signal is output to the connection point of resistors R34 and R35, and then passes through amplifiers U20.1 and U20.2, which serve as follower amplifiers, and is then output to the main control module, feeding back cable information to the main control module.

[0040] In this example: See Figure 1The signal isolation module includes integrated circuit U5 and integrated circuit U6. The models of integrated circuits U5 and U6 are ULN2003. Pins 11, 14, 15, and 16 of integrated circuit U5 are connected to the input and output terminal module, pins 12 and 13 of integrated circuit U5 are connected to the opening and closing signal module, and pins 1-6 of integrated circuit U5 are connected to the main control module through an optocoupler and a resistor respectively; pins 1-4 of integrated circuit U6 are connected to the input and output terminal module through a resistor respectively, and pins 13-16 of integrated circuit U6 are connected to the main control module through a resistor and an optocoupler respectively.

[0041] Here is an example. Pin 2 of the integrated circuit U6 is connected to the KEY_ON signal of the input-output terminal module through the resistor R6, and is output through the corresponding pin 15 of the integrated circuit U6. It passes through the resistor R2 and the optocoupler U9 in sequence and is output to the main control module, feeding the KEY_ON signal back to the main control module.

[0042] The signal isolation module protects the main control module from damage caused by sudden changes in external input signals. It utilizes an optocoupler isolation design for signal transmission. Furthermore, to enhance the direct drive capability of the main control module's pins, a ULN2003 chip is used to directly process data that previously required a standard logic buffer. Furthermore, it is capable of directly connecting TTL and CMOS circuits at a 5V operating voltage.

[0043] In this example: See Figure 1 The opening and closing signal module includes relay K1 and relay K2. The models of relays K1 and K2 are G2R-1-DC24. Pin 5 of relay K1 is connected to the signal isolation module, pin 1 of relay K1 is connected to 24V voltage, pins 2-4 of relay K1 are connected to the input and output terminal module, pin 5 of relay K2 is connected to the signal isolation module, and pins 1-4 of relay K2 are connected to the input and output terminal module.

[0044] When the external trip button is pressed, the trip signal input to terminal J1-12 (pin 12 of terminal J1) is 0V (normally DC24V when not pressed), relay K2 loses power (K2C is low), the contactor loses power, and the external DC1500V power supply is disconnected. The main control module detects the trip signal and controls K2C to a high-impedance state to disconnect the contactor power supply. The main control module controls K1C to output a low level, actuating relay K1, and the white light strip outputs power, turning the white light on and the red light off, completing the trip. If the BD terminal (pins 16 and 14 of terminal J1) is disconnected while the circuit is closed, the automatic trip sequence is immediately initiated. If the current transformer output voltage remains below the threshold for 30ms while the circuit is closed, the trip sequence is immediately initiated.

[0045] When the external closing button is pressed, terminal J1-20 (pin 20 of terminal J1) outputs 24V DC. This voltage passes through the signal isolation module, and the main control module detects the opening signal input voltage and the transformer input voltage. If the transformer input signal is below the threshold and the opening signal input is 24V DC, KEY_C outputs a high level, and transistor Q1 conducts. Terminal D (pin 14 of terminal J1) outputs a 24V signal, terminals BD are connected (shorted), and terminal B (pin 16 of terminal J1) receives a 24V signal. The main control module detects 24V at terminal B, indicating that BD is connected successfully. It controls K2C to output a low level, energizing relay K2 and closing the contactor. The main control module controls K1C to output a low level, turning off the white light strip and illuminating the red light strip, completing the closing process. If terminals BD are not connected or the transformer input voltage is above the threshold, KEY_C outputs a high-impedance state, transistor Q1 is off, K2C remains in a high-impedance state, and the contactor does not close, indicating a successful closing.

[0046] In this example: See Figure 1 The main control module includes the main control chip U4. The model of the main control chip U4 is STC8H1K16-361-LQFP32. Pin 1 of the main control chip U4 is connected to the signal input module, pins 2-4 and 10-14 of the main control chip U4 are connected to the LORA communication module, pins 5-8, 17, 18, and 21-24 of the main control chip U4 are connected to the signal isolation module, and pins 9, 19, and 20 of the main control chip U4 are connected to the 485 communication module.

[0047] The integrated control circuit receives various signals and determines in turn whether there is a fault and whether the opening and closing of the switch are successful.

[0048] In this example: See Figure 1 The 485 communication module includes a communication chip U19. The model of the communication chip U19 is YD3082EESA. Pins 1-4 of the communication chip U19 are connected to the main control module, and pins 6 and 7 of the communication chip U19 are connected to the host computer through the interface CN1.

[0049] The 485 communication module is primarily designed to transmit fault information stored in the microcontroller's on-chip memory. It can be used for emergency response, fault analysis, and fault responsibility determination. Fault information is set to the fault time and the transformer voltage output value at the time of the fault, depending on the user's needs. 485 communication is short-range communication, and the communication content is transmitted to the attached host computer via interface CN1. The 485 communication module focuses on status and fault information and connects to devices within the system. The 485 communication module connects to an external host computer via pins 15 and 19 of terminal J1. When using tooling to conduct offline single-board testing, it can be connected to a nearby host computer (computer) via CN1.

[0050] In this example: See Figure 1The LORA communication module includes a communication chip U21. The model of the communication chip U21 is E22-400T22S. Pins 1-11 and 22 of the communication chip U21 are connected to the main control module, and pin 21 of the communication chip U21 is connected to the antenna L2.

[0051] Considering that the collector trolley is usually hung high in the air and cannot be opened for measurement during use, it is impossible to know the key internal parameters and the working status of the device. Disassembly and assembly require two people to operate the lifting device, which is risky and inefficient. In order to achieve remote real-time monitoring of the key internal electrical parameters of the unit control device, disassembly and assembly do not require personnel lifting operations unless necessary. A wireless transmission function is designed, mainly implemented through the LORA communication module combined with the program. The working mode of the LORA communication module is set to 0 transmission mode fixed-point transmission according to requirements, with one send and one receive. The signal is output through antenna L2, and another LORA communication module configured at a remote host computer receives the signal through another antenna and outputs it to the remote host computer. The LORA communication module focuses on debugging and remote monitoring of internal electrical parameters, connecting to non-system devices, where the host computer can be a portable laptop.

[0052] The working principle of the present invention is as follows: the power supply module is used to convert alternating current into direct current output; the input and output terminal module is used to introduce input signals through integrated terminals and output them to the signal input module and the signal isolation module; the signal input module is used to receive the power supply status on the cable detected by the input and output terminal module through the current transformer, and output the detection signal to the main control module through the signal isolation module; the signal isolation module is used to isolate the external input signal and output it to the main control module to avoid damage to the main control module; the opening and closing signal module is used to output the opening signal and the closing signal as input signals to the input and output terminal module; the 485 communication module is used to build communication (short-distance communication) between the main control module and the host computer based on RS485 communication; the LORA communication module is used to build communication (long-distance communication) between the main control module and the host computer based on LORA communication; the main control module is used to receive signals and store fault information in a memory, and build communication with the host computer through the 485 communication module, the LORA communication module and the host computer.

[0053] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0054] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A control device for an electric control box unit of a subway current collecting trolley, characterized in that: The control device of the electric control box unit of the subway current collection trolley includes: Power supply module, used to convert AC power into DC power output; Input and output terminal modules are used to introduce input signals through integrated terminals and output them to signal input modules and signal isolation modules; The signal input module is used to receive the power supply status on the cable detected by the input and output terminal module through the current transformer, and output the detection signal to the main control module through the signal isolation module; The signal isolation module is used to isolate the external input signal and output it to the main control module to avoid damage to the main control module; The opening and closing signal module is used to output the opening signal and closing signal as input signals to the input and output terminal module; 485 communication module, used to build communication between the main control module and the host computer based on RS485 communication; LORA communication module, used to build communication between the main control module and the host computer based on LORA communication; The main control module is used to receive signals and store fault information in the memory, and establish communication with the host computer through the 485 communication module, LORA communication module; The power supply module is connected to the input and output terminal module, signal input module, signal isolation module, opening and closing signal module, 485 communication module, LORA communication module, and main control module. The opening and closing signal module is connected to the input and output terminal module. The input and output terminal module is connected to the signal input module and signal isolation module. The signal input module is connected to the main control module. The signal isolation module is connected to the main control module. The main control module is connected to the 485 communication module and LORA communication module.

2. The control device for the electric control box unit of the subway power collection vehicle according to claim 1, characterized in that: The signal input module includes amplifier U20.1 and amplifier U20.

2. The non-inverting end of amplifier U20.1 is connected to one end of resistor R34, the other end of resistor R34 is connected to one end of resistor R35, one end of resistor R30, and the current transformer signal, and the other end of resistor R30 is grounded. The inverting end of amplifier U20.1 is connected to the cathode of diode D2, one end of resistor R33, the cathode of diode D3, and one end of resistor R36. The positive electrode of diode D2 is connected to the output end of amplifier U20.1, the other end of resistor R35 is connected to the other end of resistor R36 and the inverting end of amplifier U20.

2. The non-inverting end of amplifier U20.2 is grounded, the output end of amplifier U20.2 is connected to the anode of diode D3, the other end of resistor R33 is connected to one end of capacitor C20 and the main control module, and the other end of capacitor C20 is grounded.

3. The control device for the electric control box unit of the subway power collection vehicle according to claim 1, characterized in that: The signal isolation module includes integrated circuit U5 and integrated circuit U6. The models of integrated circuits U5 and U6 are ULN2003. Pins 11, 14, 15, and 16 of integrated circuit U5 are connected to the input and output terminal module, pins 12 and 13 of integrated circuit U5 are connected to the opening and closing signal module, and pins 1-6 of integrated circuit U5 are connected to the main control module through an optocoupler and a resistor respectively; pins 1-4 of integrated circuit U6 are connected to the input and output terminal module through a resistor respectively, and pins 13-16 of integrated circuit U6 are connected to the main control module through a resistor and an optocoupler respectively.

4. The control device for the electric control box unit of the subway current collecting trolley according to claim 1, characterized in that: The opening and closing signal module includes relay K1 and relay K2. The models of relays K1 and K2 are G2R-1-DC24. Pin 5 of relay K1 is connected to the signal isolation module, pin 1 of relay K1 is connected to 24V voltage, pins 2-4 of relay K1 are connected to the input and output terminal module, pin 5 of relay K2 is connected to the signal isolation module, and pins 1-4 of relay K2 are connected to the input and output terminal module.

5. The control device for the electric control box unit of the subway current collecting trolley according to claim 1, characterized in that: The main control module includes the main control chip U4. The model of the main control chip U4 is STC8H1K16-361-LQFP32. Pin 1 of the main control chip U4 is connected to the signal input module, pins 2-4 and 10-14 of the main control chip U4 are connected to the LORA communication module, pins 5-8, 17, 18, and 21-24 of the main control chip U4 are connected to the signal isolation module, and pins 9, 19, and 20 of the main control chip U4 are connected to the 485 communication module.

6. The control device for the electric control box unit of the subway power collection vehicle according to claim 1 or 5, characterized in that: The 485 communication module includes a communication chip U19. The model of the communication chip U19 is YD3082EESA. Pins 1 to 4 of the communication chip U19 are connected to the main control module, and pins 6 and 7 of the communication chip U19 are connected to the host computer through the interface CN1.

7. The control device for the electric control box unit of the subway power collection vehicle according to claim 1 or 5, characterized in that: The LORA communication module includes a communication chip U21. The model of the communication chip U21 is E22-400T22S. Pins 1-11 and 22 of the communication chip U21 are connected to the main control module, and pin 21 of the communication chip U21 is connected to the antenna L2.

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