Embedded remote control adapter for channel signal station signal revealing system

Abstract

The utility model relates to a kind of embedded remote control adapter for channel signal station signal revealing system, belong to inland waterway traffic signal control equipment technical field.The adapter includes microprocessor, wireless communication module, PLC interface circuit, relay output circuit, state feedback acquisition circuit and mode selection switch;PLC interface circuit includes photoelectric isolation input and output channel, photoelectric isolation input channel is used to acquire existing PLC controller output state, and photoelectric isolation output channel is used to input analog manual control button control signal to existing PLC controller;Relay output circuit is used to access the forward rotation and reverse rotation control loop of signal flag or signal board lifting motor;State feedback acquisition circuit is used to connect up to position and down to position travel switch.The utility model can be switched between PLC relay mode and direct drive mode, and it is suitable for low-cost remote control reconstruction of existing channel signal station mechanical signal revealing system.

Description

Technical Field

[0001] This utility model belongs to the technical field of inland waterway traffic signal control equipment, and relates to an embedded remote control adapter for a waterway signal station signal display system. Background Technology

[0002] Signal stations are set up in certain controlled sections of inland waterways to display passage signals to passing vessels via signal flags, signs, or lights. Taking traditional signal stations in inland waterways as an example, their signal display devices mostly use motor-driven mechanical signal flag or sign systems. These systems are typically controlled by a PLC controller to rotate the lifting motor forward or backward, thereby pulling the triangular flag, rectangular sign, or other physical signal marker suspended on the pole to raise or lower, displaying passage signals such as "permitted upstream," "permitted downstream," "no navigation," and "half-pole."

[0003] Traditional PLC control systems were initially largely operated manually on-site, with signalmen issuing control commands for raising or lowering flags or switching signals via buttons or operation panels on the signal control cabinet. However, as waterway management evolves towards remote, centralized, and unmanned operation, existing signal stations face the need for remote control upgrades.

[0004] Existing upgrade methods typically involve either replacing the entire system with an LED intelligent traffic light system or building a new signal display and control system. However, these methods have the following drawbacks: (1) High renovation cost: The traditional signal flag or signal sign system is completely dismantled and replaced with a brand new LED signal light system. The power supply, communication, pole foundation, control cabinet and field wiring need to be renovated at the same time, and the cost of a single unit is high.

[0005] (2) Waste of existing equipment: Many existing signal stations’ PLC controllers, motors, mechanical traction structures, limit switches and power supply lines are still usable. Complete removal would result in waste of equipment resources.

[0006] (3) The construction period is long: the overall renovation involves shutdown construction, line rearrangement and equipment debugging, which will affect the normal operation of the waterway signal station.

[0007] (4) Lack of standardized switching device: There is a lack of a hardware switching device in the existing technology that can be directly installed in the existing PLC control cabinet, is compatible with the original PLC control system, and has remote communication capabilities.

[0008] Existing technologies for remote monitoring of waterway signals or synchronous control of multiple signal stations primarily address remote monitoring, data sharing, or command coordination from the perspectives of system platform, network communication, and collaborative control of multiple signal stations. However, they do not provide a standardized, embedded, and readily installable field hardware adapter for existing traditional PLC mechanical signal display systems.

[0009] Therefore, it is necessary to provide an embedded remote control adapter for the traditional signal display system of existing waterway signal stations, so as to enable the remote control upgrade of the traditional signal flag or signal sign system without large-scale removal of the original equipment. Utility Model Content

[0010] In view of this, the purpose of this utility model is to provide an embedded remote control adapter for a navigation signal station signal display system. This adapter can be installed in the PLC control cabinet of an existing navigation signal station for remote control upgrades of traditional mechanical signal flags or signs. It solves the problems of existing mechanical signal display systems lacking remote control capabilities, high overall replacement and upgrade costs, and difficulty in reusing existing PLC control equipment. The adapter receives remote control commands through a wireless communication module and controls the raising and lowering of traditional signal flags or signs through a PLC interface circuit or relay output circuit. Simultaneously, it provides feedback on the signal display status through PLC status signals and limit switch signals, thereby realizing the remote control upgrade of traditional navigation signal stations.

[0011] To achieve the above objectives, this utility model provides the following technical solution: An embedded remote control adapter for a navigation signal display system includes a housing 1 that can be installed in an existing PLC control cabinet 200 and a main control circuit board disposed within the housing. The main control circuit board includes a microprocessor 3, a wireless communication module 4 electrically connected to the microprocessor 3, a PLC interface circuit 5, a relay output circuit 6, a status feedback acquisition circuit 7, and a mode selection switch 8. The wireless communication module 4 is electrically connected to the microprocessor 3 and is used to receive control commands sent by the remote command center 700 and upload the adapter status data to the remote command center 700. The adapter status data includes operating status, communication status, relay action status, PLC feedback status, and signal flag or signal sign position status. The PLC interface circuit 5 includes at least one opto-isolated input channel 51 and at least one opto-isolated output channel 52. The input terminal of the opto-isolated input channel 51 is electrically connected to the PLC output terminal 302 of the existing PLC controller 300 to collect the status signal of the PLC output terminal 302. The output terminal of the opto-isolated input channel 51 is electrically connected to the input terminal of the microprocessor 3. The input terminal of the opto-isolated output channel 52 is electrically connected to the output terminal of the microprocessor 3, and the output terminal of the opto-isolated output channel 52 is electrically connected to the PLC input terminal 301 of the existing PLC controller 300 to input control signals of analog manual control buttons to the existing PLC controller 300. The relay output circuit 6 includes at least two relays. The contact output terminal of at least one relay is used to connect to the forward rotation control circuit 401 of the signal flag or signal sign lifting motor 400, and the contact output terminal of at least one relay is used to connect to the reverse rotation control circuit 402 of the signal flag or signal sign lifting motor 400. The relay contacts can be used to control the flag raising contactor coil, the flag lowering contactor coil, or the existing motor control circuit.

[0012] The status feedback acquisition circuit 7 includes at least two acquisition channels. The input terminals of the acquisition channels are used to connect to the upper limit switch 500 and the lower limit switch 600 of the signal flag or signal board to acquire the upper limit state, lower limit state, or intermediate running state of the signal flag or signal board. The output terminals of the acquisition channels are electrically connected to the acquisition input terminals of the microprocessor 3. The status feedback acquisition circuit 7 only provides position feedback signals to the microprocessor 3 and does not directly connect to the coil drive circuit of the relay output circuit 6.

[0013] The mode selection switch 8 is electrically connected to the microprocessor 3 and is used to switch the adapter between PLC relay mode and direct drive mode. In PLC relay mode, the microprocessor 3 outputs control signals simulating manual buttons to the existing PLC controller 300 through the opto-isolated output channel 52, and the existing PLC controller 300 drives the signal flag or signal sign lifting motor according to the original control logic. In direct drive mode, the microprocessor 3 outputs control signals to the forward rotation control circuit 401 or reverse rotation control circuit 402 of the signal flag or signal sign lifting motor 400 through the relay output circuit 6 to control the raising and lowering of the signal flag or signal sign.

[0014] Preferably, the relay output circuit 6 further includes an interlock circuit 63, which is disposed between the two relays to prevent the forward control circuit and the reverse control circuit from being simultaneously activated; the two relays are a forward relay and a reverse relay; the interlock circuit includes a normally closed contact of the forward relay and a normally closed contact of the reverse relay, the normally closed contact of the forward relay is connected in series in the coil drive circuit of the reverse relay, and the normally closed contact of the reverse relay is connected in series in the coil drive circuit of the forward relay.

[0015] Preferably, both the opto-isolated input channel 51 and the opto-isolated output channel 52 include an optocoupler, and the isolation voltage of the optocoupler is not less than 2500Vrms.

[0016] Preferably, each acquisition channel of the status feedback acquisition circuit 7 includes a current-limiting resistor, a voltage-dividing resistor, and a filter capacitor; the current-limiting resistor is connected between the upper limit switch 500 or the lower limit switch 600 and the microprocessor 3; the voltage-dividing resistor and the filter capacitor are connected in parallel, with one end grounded and the other end electrically connected to the microprocessor 3.

[0017] Preferably, the adapter 100 further includes an independent power supply module 17, specifically including an AC-DC switching power supply module and a DC-DC voltage regulator module; the input terminal of the AC-DC switching power supply module is used to connect to the AC power supply terminal in the existing PLC control cabinet 200; the output terminal of the AC-DC switching power supply module is electrically connected to the input terminal of the DC-DC voltage regulator module, and the output terminal of the DC-DC voltage regulator module is electrically connected to the main control circuit board.

[0018] Preferably, the main control circuit board is also provided with a DIP switch 9, which is used to set the device identification ID and signal flag or signal plate control logic type of the adapter 100.

[0019] Preferably, the main control circuit board is also provided with a flash memory chip 10, which is electrically connected to the microprocessor 3 via an SPI bus.

[0020] Preferably, the main control circuit board also includes an external signal light control interface 18, which is electrically connected to the serial communication port of the microprocessor 3 and is used to connect to the LED auxiliary signal light controller.

[0021] Preferably, housing 1 is a DIN standard rail mounting housing, with DIN rail clips on the back and terminal blocks 19 on the housing, facilitating quick installation and wiring within existing PLC control cabinets 200.

[0022] Preferably, the housing 1 is provided with a SIM card slot 15, which is electrically connected to the SIM card interface of the wireless communication module (using a 4G communication module) 4.

[0023] Preferably, the housing 1 is provided with an RJ45 Ethernet interface 16 for wired network communication. The RJ45 Ethernet interface 16 is electrically connected to the microprocessor 3 through an Ethernet interface circuit.

[0024] Preferably, the front of the housing 1 is provided with a signal strength indicator 12, a communication status indicator 13 and a relay action indicator 14, all of which are electrically connected to the output terminal of the microprocessor 3.

[0025] The beneficial effects of this utility model are as follows: (1) Low cost of reuse and renovation: This utility model can be directly installed in the existing PLC control cabinet and connected to the original PLC input terminal, PLC output terminal, motor control circuit and limit switch through the terminal block. There is no need to completely dismantle the original PLC, motor, mechanical signal flag or signal board system.

[0026] (2) Compatible with existing PLC control logic: In PLC relay mode, the adapter simulates the original manual button input through the opto-isolated output channel. The existing PLC still executes motor control according to the original control logic, reducing the risk of modification.

[0027] (3) Possesses direct drive backup capability: In the event of a PLC failure or the need to bypass PLC control, the mode can be switched to direct drive mode via a mode selection switch, and the relay output circuit can be connected to the motor forward rotation control circuit or reverse rotation control circuit to improve on-site adaptability.

[0028] (4) High electrical isolation safety: The PLC interface circuit adopts opto-isolated input channel and opto-isolated output channel, which can reduce the impact of existing PLC high-voltage side or field interference on the adapter.

[0029] (5) Prevent motor forward and reverse conflict: An interlock circuit is set between the forward and reverse relays to prevent the flag raising and lowering control circuits from operating simultaneously, thereby improving the safety of motor control.

[0030] (6) Forming a closed loop of status feedback: The adapter can collect the output status of the PLC and the upper and lower limit switch signals to realize the corresponding feedback between remote control commands and on-site action results.

[0031] (7) Easy installation: The DIN rail mounting housing and terminal block structure are suitable for quick installation in existing PLC control cabinets, with a short construction period.

[0032] (8) It has expansion capabilities: It has reserved RJ45 Ethernet interface, flash memory chip and external signal light control interface, which can support wired communication, local log recording and subsequent LED auxiliary signal light linkage expansion.

[0033] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0034] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the installation and connection of the adapter in the existing PLC control cabinet in Example 1; Figure 2 This is a schematic diagram of the front structure of the adapter housing in Example 2; Figure 3 This is a hardware structure block diagram of the main control circuit board in Example 3; Figure 4 This is a schematic diagram of the connection relationship in PLC relay mode in Example 4; Figure 5This is a schematic diagram of the connection relationship in direct drive mode in Example 5; Figure 6 This is a schematic diagram of the relay forward and reverse rotation interlock circuit in Example 6; Figure 7 This is a schematic diagram of the circuit principle of the opto-isolated input channel and the opto-isolated output channel in Example 7; Figure 8 This is a schematic diagram of the state feedback acquisition circuit in Example 8.

[0035] Reference numerals: 100-Adapter; 1-Housing; 3-Microprocessor; 4-Wireless communication module; 5-PLC interface circuit; 51-Optical isolation input channel; 52-Optical isolation output channel; 6-Relay output circuit; 61-Forward relay; 62-Reverse relay; 63-Interlock circuit; 61-1-Normally open contact of forward relay; 61-2-Normally closed contact of forward relay; 62-1-Normally open contact of reverse relay; 62-2-Normally closed contact of reverse relay; 7-Status feedback acquisition circuit; 8-Mode selection switch; 9-DIP switch; 10-Flash memory chip; 11-DIN rail clip; 12-Signal strength indicator; 13- 14 - Communication status indicator; 15 - Relay operation indicator; 16 - SIM card slot; 17 - RJ45 Ethernet interface; 18 - Independent power supply module; 19 - External signal light control interface; 200 - Terminal block; 201 - Existing PLC control cabinet; 302 - DIN rail; 303 - Existing PLC controller; 304 - PLC input terminal; 305 - PLC output terminal; 406 - Signal flag or signal sign lifting motor; 407 - Forward rotation control circuit; 408 - Reverse rotation control circuit; 410 - Flag raising contactor; 420 - Flag lowering contactor; 500 - Upper limit switch; 600 - Lower limit switch; 700 - Remote command center. Detailed Implementation

[0036] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0037] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0038] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0039] Example 1: This embodiment provides an overall installation structure for an embedded remote control adapter, such as... Figure 1 As shown, the embedded remote control adapter is installed inside the existing PLC control cabinet 200. The existing PLC control cabinet 200 is equipped with a DIN rail 201, and the adapter 100 is fastened to the DIN rail 201 by the DIN rail clip 11 on the back of the housing 1.

[0040] The adapter 100 is electrically connected to the PLC input terminal 301 and PLC output terminal 302 of the existing PLC controller 300, the forward control circuit 401 and reverse control circuit 402 of the signal flag or signal sign lifting motor 400, the upper limit switch 500 and the lower limit switch 600 respectively via the terminal block 19.

[0041] The adapter 100 communicates with the remote command center 700 via the wireless communication module 4. The remote command center 700 can send signal disclosure control commands to the adapter 100, and the adapter 100 can upload communication status, equipment status, control output status, and signal flag or sign position status to the remote command center 700.

[0042] Example 2: This embodiment provides a shell structure, such as Figure 2 As shown, the adapter 100 includes a housing 1. The housing 1 may be an industrial control module type housing, adapted for DIN standard rail mounting.

[0043] The front of the housing 1 is provided with a signal strength indicator 12, a communication status indicator 13, and a relay operation indicator 14. The signal strength indicator 12 is used to display the signal strength of the wireless communication module 4; the communication status indicator 13 is used to display the online or offline status between the adapter 100 and the remote command center 700; and the relay operation indicator 14 is used to display the operation status of the forward relay 61, the reverse relay 62, or other relays.

[0044] The housing 1 also includes a mode selection switch 8, a DIP switch 9, a SIM card slot 15, an RJ45 Ethernet interface 16, and a terminal block 19. The mode selection switch 8 is used to switch between PLC relay mode and direct drive mode. The DIP switch 9 is used to set the device identification ID and the control logic type of the signal flag or signal board. The SIM card slot 15 connects to the wireless communication module 4 and is used to install a communication SIM card. The RJ45 Ethernet interface 16 is used for data communication under wired network conditions.

[0045] Terminal block 19 is used to connect the existing PLC controller 300, the lifting motor control circuit, the upper limit switch 500, the lower limit switch 600, and the external power supply terminal.

[0046] Example 3: This embodiment provides a main control circuit board structure, such as Figure 3 As shown, the housing 1 contains a main control circuit board, which includes a microprocessor 3, a wireless communication module 4, a PLC interface circuit 5, a relay output circuit 6, a status feedback acquisition circuit 7, a mode selection switch 8, a DIP switch 9, a flash memory chip 10, an independent power supply module 17, and an external signal light control interface 18.

[0047] The microprocessor 3 is the control core of the adapter 100 and can be a microcontroller, embedded processor, or industrial control processor. The wireless communication module 4 can be a 4G communication module, or, depending on the actual communication conditions, a 5G, NB-IoT, private network communication module, or other wireless communication module.

[0048] The PLC interface circuit 5 includes an opto-isolated input channel 51 and an opto-isolated output channel 52. The opto-isolated input channel 51 is used to acquire status signals from the existing PLC output terminal 302. The opto-isolated output channel 52 is used to output control signals to the existing PLC input terminal 301.

[0049] The relay output circuit 6 includes a forward rotation relay 61, a reverse rotation relay 62, and an interlock circuit 63. The forward rotation relay 61 is used to connect to the forward rotation control circuit 401, and the reverse rotation relay 62 is used to connect to the reverse rotation control circuit 402.

[0050] The status feedback acquisition circuit 7 is used to acquire the status signals of the upper limit switch 500 and the lower limit switch 600.

[0051] The flash memory chip 10 is connected to the microprocessor 3 via the SPI bus and is used to record local instructions, actions, and communication status data. The external signal light control interface 18 is connected to the serial communication port of the microprocessor 3 and is used to connect to the LED auxiliary signal light controller.

[0052] The independent power supply module 17 includes an AC-DC switching power supply module and a DC-DC voltage regulator module. The input terminal of the AC-DC switching power supply module can be connected to the AC power supply terminal inside the existing PLC control cabinet 200, and the DC-DC voltage regulator module is used to provide DC operating voltage to the various circuit modules on the main control circuit board.

[0053] Example 4: This embodiment provides a connection structure and working method in PLC relay mode, such as Figure 4 As shown, when the mode selection switch 8 is set to PLC relay mode, the adapter 100 does not directly replace the original control logic of the existing PLC controller 300, but serves as an isolation adapter between remote control commands and the existing PLC controller 300.

[0054] The remote command center 700 sends control commands to the wireless communication module 4. After the microprocessor 3 parses the control commands, it outputs control signals to the PLC input terminals 301 of the existing PLC controller 300 through the opto-isolated output channel 52. These control signals are used to simulate the closing or releasing action of the original manual control buttons.

[0055] Upon receiving the corresponding input signal, the existing PLC controller 300 controls the lifting motor 400 of the signal flag or sign to operate according to the original program logic. The PLC output terminal 302 of the existing PLC controller 300 can feed back the current output status to the microprocessor 3 through the opto-isolated input channel 51. The microprocessor 3 then uploads the collected status data to the remote command center 700 via the wireless communication module 4.

[0056] In this mode, the original PLC's internal limit protection, interlock protection, and operating logic can be retained, making it suitable for signal station retrofitting scenarios where the existing PLC controller 300 is working normally.

[0057] Example 5: This embodiment provides a connection structure and working method in direct drive mode, such as Figure 5 As shown, when the mode selection switch 8 is set to direct drive mode, the adapter 100 can be connected to the forward control circuit 401 and the reverse control circuit 402 of the signal flag or signal sign lifting motor 400 through the relay output circuit 6.

[0058] After receiving a remote control command, the microprocessor 3 controls the forward rotation relay 61 or the reverse rotation relay 62 to operate. The contacts of the forward rotation relay 61 can be connected to the coil control circuit of the flag raising contactor 410, and the contacts of the reverse rotation relay 62 can be connected to the coil control circuit of the flag lowering contactor 420. The flag raising contactor 410 and the flag lowering contactor 420 further control the forward or reverse rotation of the signal flag or signal sign lifting motor 400.

[0059] In direct drive mode, the status feedback acquisition circuit 7 directly acquires the signals from the upper limit switch 500 and the lower limit switch 600. When the microprocessor 3 detects that the signal flag or signal sign has reached the target position, it disconnects the corresponding relay output, causing the motor to stop running. The status feedback acquisition circuit 7 only serves as the acquisition input for the microprocessor 3 and does not directly drive the forward rotation relay 61 or the reverse rotation relay 62.

[0060] To improve safety, an interlock circuit 63 is provided between the forward relay 61 and the reverse relay 62 to prevent the forward control circuit 401 and the reverse control circuit 402 from being connected at the same time.

[0061] Example 6: This embodiment provides a specific structure for a relay output circuit, such as... Figure 6 As shown, the relay output circuit 6 includes a forward relay 61, a reverse relay 62, and an interlock circuit 63. The coil drive terminal of the forward relay 61 is connected to the output terminal of the microprocessor 3, and the coil drive terminal of the reverse relay 62 is connected to another output terminal of the microprocessor 3. The normally open contact 61-1 of the forward relay is connected to the forward control circuit 401, and the normally open contact 62-1 of the reverse relay 62 is connected to the reverse control circuit 402.

[0062] The interlock circuit 63 includes a normally closed contact 61-2 of the forward relay and a normally closed contact 62-2 of the reverse relay. The normally closed contact 61-2 of the forward relay is connected in series in the coil drive circuit of the reverse relay 62, and the normally closed contact 62-2 of the reverse relay is connected in series in the coil drive circuit of the forward relay 61.

[0063] When the forward relay 61 is energized, its normally closed contact disconnects the coil drive circuit of the reverse relay 62, preventing the reverse relay 62 from energizing simultaneously. Conversely, when the reverse relay 62 is energized, its normally closed contact disconnects the coil drive circuit of the forward relay 61, preventing the forward relay 61 from energizing simultaneously. This achieves hardware interlocking, improving the safety of motor forward and reverse rotation control.

[0064] Example 7: This embodiment provides a specific structure for a PLC interface circuit, such as... Figure 7 As shown, the PLC interface circuit 5 includes an opto-isolated input channel 51 and an opto-isolated output channel 52.

[0065] The opto-isolated input channel 51 may include a current-limiting resistor R1, an optocoupler OC1, and a pull-up resistor R2. The input terminal of the opto-isolated input channel 51 is connected to the PLC output terminal 302 of the existing PLC controller 300, and the output terminal is connected to the input terminal of the microprocessor 3. Optocoupler isolation isolates PLC-side signals from microprocessor-side signals.

[0066] The opto-isolated output channel 52 may include a current-limiting resistor R3, an optocoupler OC2, and an output-side interface circuit. The input terminal of the opto-isolated output channel 52 is connected to the output terminal of the microprocessor 3, and the output terminal is connected to the PLC input terminal 301 of the existing PLC controller 300. When the microprocessor 3 outputs a control signal, the opto-isolated output channel 52 provides an isolated control signal to the PLC input terminal 301, equivalent to a manual button operation.

[0067] The isolation voltage of the optocoupler can be no less than 2500Vrms to improve the electrical isolation capability between the adapter 100 and the existing PLC control cabinet 200.

[0068] Example 8: This embodiment provides a specific structure for a state feedback acquisition circuit, such as... Figure 8 As shown, the status feedback acquisition circuit 7 includes at least two acquisition channels. One acquisition channel is connected to the upper limit switch 500, and the other acquisition channel is connected to the lower limit switch 600.

[0069] Each acquisition channel may include a current-limiting resistor (R4 or R6), a voltage-dividing resistor (R5 or R7), and a filter capacitor (C1 or C2). The field limit switch signal, after current limiting, voltage division, and filtering, is input to the acquisition input terminal of the microprocessor 3. The microprocessor 3 determines whether the signal flag or signal board is in the upper, lower, or intermediate operating position based on the status of the upper limit switch 500 and the lower limit switch 600.

[0070] In other embodiments, the status feedback acquisition circuit 7 may also adopt an opto-isolated input structure or a dry contact input structure to adapt to different signal station field line conditions.

[0071] Example 9: This embodiment provides a DIP switch setting and expansion method. The DIP switch 9 can be configured as a multi-bit DIP switch, where some bits are used to set the device identifier ID, and some bits are used to set the signal flag or signal plate control logic type. For example, different DIP switch combinations can correspond to triangular flags, rectangular signs, spherical signals, or other mechanical signal display forms.

[0072] The external signal light control interface 18 can adopt RS485, UART, CAN or other serial communication interfaces to connect to the LED auxiliary signal light controller. When LED auxiliary signal lights are subsequently added to the signal station, the adapter 100 can realize the linkage control between the existing mechanical signal flags or signal signs and the newly added LED auxiliary signal lights through the external signal light control interface 18.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An embedded remote control adapter for a navigation signal station signaling system, characterized in that, It includes a housing (1) and a main control circuit board disposed inside the housing; the main control circuit board includes a microprocessor (3), and a wireless communication module (4), a PLC interface circuit (5), a relay output circuit (6), a status feedback acquisition circuit (7), and a mode selection switch (8) electrically connected to the microprocessor (3); The wireless communication module (4) is used to receive control commands sent by the remote command center (700) and upload the adapter status data to the remote command center (700); the adapter status data includes operating status, communication status, relay action status, PLC feedback status and signal flag or signal sign position status; The PLC interface circuit (5) includes at least one opto-isolated input channel (51) and at least one opto-isolated output channel (52); the input terminal of the opto-isolated input channel (51) is electrically connected to the PLC output terminal (302) of the existing PLC controller (300) to collect the status signal of the PLC output terminal (302); the output terminal of the opto-isolated input channel (51) is electrically connected to the input terminal of the microprocessor (3); the input terminal of the opto-isolated output channel (52) is electrically connected to the output terminal of the microprocessor (3), and the output terminal of the opto-isolated output channel (52) is electrically connected to the PLC input terminal (301) of the existing PLC controller (300) to input control signals of the analog manual control button to the existing PLC controller (300); The relay output circuit (6) includes at least two relays. The contact output terminal of at least one relay is used to connect to the forward rotation control circuit (401) of the signal flag or signal sign lifting motor (400), and the contact output terminal of at least one relay is used to connect to the reverse rotation control circuit (402) of the signal flag or signal sign lifting motor (400). The status feedback acquisition circuit (7) includes at least two acquisition channels. The input end of the acquisition channel is used to connect the upper limit switch (500) and the lower limit switch (600) of the signal flag or signal sign. The output end of the acquisition channel is electrically connected to the acquisition input end of the microprocessor (3). The mode selection switch (8) is used to switch the adapter between PLC relay mode and direct drive mode. In PLC relay mode, the microprocessor (3) outputs control signals of analog manual buttons to the existing PLC controller (300) through the opto-isolated output channel (52). In direct drive mode, the microprocessor (3) outputs control signals to the forward rotation control circuit (401) or reverse rotation control circuit (402) of the signal flag or signal sign lifting motor (400) through the relay output circuit (6).

2. The embedded remote control adapter for a waterway signaling system according to claim 1, characterized in that, The relay output circuit (6) further includes an interlock circuit (63) disposed between the two relays; the two relays are a forward relay and a reverse relay; the interlock circuit includes a normally closed contact of the forward relay and a normally closed contact of the reverse relay, the normally closed contact of the forward relay is connected in series in the coil drive circuit of the reverse relay, and the normally closed contact of the reverse relay is connected in series in the coil drive circuit of the forward relay.

3. The embedded remote control adapter for a waterway signaling system according to claim 1, characterized in that, Both the opto-isolated input channel (51) and the opto-isolated output channel (52) include an optocoupler.

4. The embedded remote control adapter for a waterway signaling system according to claim 1, characterized in that, Each acquisition channel of the state feedback acquisition circuit (7) includes a current limiting resistor, a voltage dividing resistor and a filter capacitor; the current limiting resistor is connected between the upper limit switch (500) or the lower limit switch (600) and the microprocessor (3); the voltage dividing resistor and the filter capacitor are connected in parallel, with one end grounded and the other end electrically connected to the microprocessor (3).

5. The embedded remote control adapter for a navigation signaling system according to any one of claims 1 to 4, characterized in that, The adapter (100) also includes an independent power supply module (17), specifically including an AC-DC switching power supply module and a DC-DC voltage regulator module; the input terminal of the AC-DC switching power supply module is used to connect to the AC power supply terminal in the existing PLC control cabinet (200); the output terminal of the AC-DC switching power supply module is electrically connected to the input terminal of the DC-DC voltage regulator module, and the output terminal of the DC-DC voltage regulator module is electrically connected to the main control circuit board.

6. The embedded remote control adapter for a navigation signaling system according to any one of claims 1 to 4, characterized in that, The main control circuit board also includes a DIP switch (9) for setting the device identification ID and signal flag or signal plate control logic type of the adapter (100).

7. The embedded remote control adapter for a navigation signal station signaling system according to any one of claims 1 to 4, characterized in that, The main control circuit board also includes a flash memory chip (10), which is electrically connected to the microprocessor (3) via an SPI bus.

8. The embedded remote control adapter for a navigation signaling system according to any one of claims 1 to 4, characterized in that, The main control circuit board also includes an external signal light control interface (18), which is electrically connected to the serial communication port of the microprocessor (3) and is used to connect to the LED auxiliary signal light controller.

9. The embedded remote control adapter for a waterway signaling system according to claim 1, characterized in that, The housing (1) is a DIN standard rail mounting housing, with a DIN rail buckle on the back and a terminal block (19) on the housing.

10. The embedded remote control adapter for a navigation signaling system according to claim 1 or 9, characterized in that, The housing (1) is provided with a SIM card slot (15), which is electrically connected to the SIM card interface of the wireless communication module (4).

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