Carrier routing monitoring device for state grid concentrator terminal

Abstract

The utility model relates to a carrier wave routing monitoring device used for a state grid concentrator terminal, which is used between the concentrator terminal and a carrier wave routing module and comprises a main control module, a communication weak current terminal strip and a carrier wave routing strong current terminal strip. The main control module is connected with the power management module, the monitoring chip module, the USB storage interface module, the RS485 interface module, the CAN interface module, the RS232 interface module and the terminal interaction indication module; the communication weak current terminal strip receives information interaction between the terminal and the carrier wave routing module, and three-phase voltage of the concentrator terminal is connected to the monitoring device through the carrier wave routing strong current terminal strip and then is transmitted to the carrier wave routing module through the monitoring device. Various debugging monitoring requirements of the concentrator terminal are met; data can be stored in time, so that the troubleshooting efficiency is improved; the method adapts to various communication protocols, and the compatibility between equipment and software is improved; the structure limitation is reduced, field installation and use are facilitated, and the troubleshooting speed and accuracy are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to data acquisition and interactive technical field, concretely relates to a carrier wave routing monitoring device for state grid concentrator terminal. BACKGROUND

[0002] In the data acquisition system of smart grid, the interactive message monitoring between the concentrator and the carrier wave routing module is an important link to ensure the accuracy of data transmission and the stability of the system. However, in the development and later field debugging process, due to the limitation of the existing state grid APP modular design, only meter reading process operation can be carried out, and the interactive message between the concentrator and the carrier wave routing module cannot be reported and obtained in real time, which causes serious obstacles to the discovery and troubleshooting of problems when equipment failure or meter reading garbled code problems occur. In addition, the current monitoring device can usually only support a single communication protocol, which is not enough in the actual application environment where multiple protocols coexist, especially in the case of limited field environment, it cannot flexibly cope with the compatibility problem between different hardware devices and software protocols. SUMMARY

[0003] To solve the above problems, the utility model provides a carrier wave routing monitoring device for state grid concentrator terminal for between concentrator terminal and carrier wave routing module, including main control module, communication weak electric terminal row and carrier wave routing strong electric terminal row, the main control module includes main control chip MCU, the main control module connects power management module, monitoring chip module, USB storage interface module, RS485 interface module, CAN interface module, RS232 interface module and terminal interaction indication module, the communication weak electric terminal row undertakes the information interaction between terminal and carrier wave routing module, the monitoring device is installed in the carrier wave routing slot of concentrator through carrier wave routing strong electric terminal row, and the upper end undertakes carrier wave routing module, three -phase voltage of the concentrator terminal is connected to the monitoring device through carrier wave routing strong electric terminal row, and then is delivered to the carrier wave routing module by the monitoring device.

[0004] On the basis of the above scheme, the power management module is input connected to the concentrator terminal, and a first voltage is output to the USB storage interface module, the RS485 interface module and the CAN interface module through a DC-DC conversion module, and a second voltage is output to the main control module peripheral circuit, the CAN interface module, the RS232 module and the terminal interaction indication module through a low dropout regulator module.

[0005] On the basis of the above scheme, the monitoring chip module includes a watchdog chip and a peripheral circuit, the MCU controls a timer to send interval pulse signals, the pulse signals are sent to an RC differential circuit, the RC differential circuit converts the pulse signals into spike pulses at the input end of the watchdog chip, the watchdog chip receives the spike pulses, resets an internal counter, and outputs a single low-level signal at the output end, the low-level signal is connected to the gate of a MOS tube, the drain of the MOS tube is connected to a 3.3V power supply, and the source of the MOS tube is connected to the MCU.

[0006] On the basis of the above scheme, the USB storage interface module is connected with the MCU through a differential USB line, a TVS array is arranged between the differential USB line and the MCU, and the USB storage interface module exchanges information through the USB storage.

[0007] On the basis of the above scheme, the RS485 interface module includes an RS485 transmission chip and adopts a three-wire communication mode, a level conversion circuit is arranged at the front end of the RS485 transmission chip, a thermistor is connected in series on the RS485 bus, and a TVS diode is connected in parallel.

[0008] On the basis of the above scheme, the CAN interface module is provided with a filter circuit, 5V power supply is used at the isolation side, and 3.3V power supply is used at the system side, and a thermistor and a TVS diode are used at the isolation side.

[0009] On the basis of the above scheme, the RS232 interface module is a main debugging interface and is in a normal open mode, a TVS diode is added to the interface, and an RC filter circuit is added to the RS232 bus.

[0010] On the basis of the above scheme, the terminal interaction indication module includes two groups of indication circuits, a first indication circuit is arranged between the monitoring device and the concentrator terminal, a first indication lamp in the first indication circuit displays the interaction state between the concentrator terminal and the monitoring device, and a second indication circuit is arranged between the monitoring device and the carrier routing module, a second indication lamp in the second indication circuit displays the interaction state between the monitoring device and the carrier routing module.

[0011] Compared with the prior art, the concentrator terminal can meet various debugging and monitoring requirements, power supply can be directly obtained from the concentrator terminal, other power supplies need not be externally connected, normal communication between the carrier routing module and the terminal is not affected in the process of obtaining interaction information, data can be timely saved to prevent data loss, problem troubleshooting efficiency is improved, development time is saved, a plurality of communication protocols can be adapted, compatibility between equipment and software is improved, structural limitations are reduced, on-site installation and use are facilitated, and troubleshooting speed and accuracy are improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 The device structure schematic view of the utility model;

[0013] Figure 2 The device connection schematic view of the utility model;

[0014] Figure 3 The signal transmission schematic view of the power management module in the utility model;

[0015] Figure 4 The monitoring chip module circuit schematic view in the utility model;

[0016] Figure 5 The RS485 interface module circuit schematic view in the utility model;

[0017] Figure 6 The CAN interface module circuit schematic view in the utility model;

[0018] Figure 7 The RS232 interface module circuit schematic view in the utility model; Specific implementation mode

[0019] The utility model will be further described below in connection with the drawings:

[0020] In the utility model, unless another explicit provision and limitation, the terms "mount", "connect", "connect", "fix" and so on should be broad understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;It can be directly connected, or indirectly connected through the intermediate medium, it can be the communication of two elements or the interaction of two elements.For ordinary skilled in the art, the above-mentioned terms can be understood according to the specific meaning of the utility model.

[0021] As Figure 1 And Figure 2 The utility model provides a kind of carrier routing monitoring device for State Grid concentrator terminal, which is used between concentrator terminal and carrier routing module.The monitoring device includes power management module, master control module, monitoring chip module, carrier routing strong electric terminal row, USB storage interface module, RS485 interface module, CAN interface module, RS232 interface module, terminal interactive indication module and communication weak electric terminal row.The communication weak electric terminal row undertakes information interaction between terminal and carrier routing module;The monitoring device is installed in the carrier routing slot of concentrator by the carrier routing strong electric terminal row, and upper end undertakes carrier routing module, and the three-phase voltage of the concentrator terminal is connected to the monitoring device by carrier routing strong electric terminal row, and then is transferred to carrier routing module by the monitoring device.

[0022] The monitoring device is inserted into the strong and weak electricity ports of the concentrator terminal below, and the strong and weak electricity terminal rows are reserved above to receive the carrier routing module, so as to realize the monitoring purpose without affecting the normal data interaction. Specifically, the carrier routing slots of the concentrator include strong electricity ports and weak electricity ports, the weak electricity ports are weak electricity interfaces for data interaction between the carrier routing module and the concentrator terminal, and the strong electricity ports are three-phase voltage power supplies, which ensure that the carrier routing module can read through the three-phase power line. The monitoring device provided in the application is arranged between the concentrator terminal and the carrier routing module, and cannot affect the normal working interaction of the concentrator terminal and the carrier routing module, so the monitoring device is inserted into the strong and weak electricity ports of the concentrator terminal, and in order to ensure the normal working of the carrier routing module connected to the monitoring device, the carrier routing strong electricity terminal row and the communication weak electricity terminal row are arranged on the monitoring device.

[0023] Further, the three-phase voltage provided by the concentrator terminal to the carrier routing module is received by the carrier routing strong electricity terminal row and then received by the strong electricity socket of the carrier routing module, so as to ensure that the carrier routing module can normally perform carrier communication function through the power line; the communication weak electricity terminal row receives the information interaction between the terminal and the carrier routing module, so that the monitoring device inserted between the concentrator terminal and the carrier routing module will not affect the normal interaction operation between the two. The communication weak electricity terminal row and the carrier routing strong electricity terminal row together receive the entire carrier routing module, so as to ensure the stable connection of the carrier routing module.

[0024] The main control module includes a main control chip MCU, which is connected to a power management module, a monitoring chip module, a USB storage interface module, an RS485 interface module, a CAN interface module, an RS232 interface module and a terminal interaction indication module through a multi-channel USART interface. The main control module is responsible for system input and output control, communication interaction control and terminal interaction indication control functions.

[0025] Preferably, the master module adopts an ARMv7-M architecture 32-bit Cortex-M4 master chip MCU, has 4-way USART, supports ISO7816-3 protocol, has 1-way CAN, supports ISO11898-1 standard protocol, has 1 USB 2.0 FS, built-in PHY, and supports Device / Host. Specifically, this part is responsible for controlling the input and output control of the whole system, communication interaction control, terminal interaction indication control, etc. Therefore, the device can communicate with the equipment conforming to the ISO7816-3 standard through the four serial interfaces. In this application, the master module interacts with the RS485 interface module, the RS232 interface module, the terminal, and the local carrier routing through the 4-way USART port; further, the master module can also exchange high-speed data with other equipment conforming to the ISO11898-1 standard through a CAN interface; at the same time, it can also transmit data at a medium speed through a USB interface, and this interface can be used as a USB device or a USB host. The built-in PHY represents that the USB interface of the device has already included the physical layer circuit, and does not need an additional external PHY chip to realize USB communication, simplifying the hardware design.

[0026] The power management module is used to provide stable voltage supply to ensure the normal work of each module. The concentrator terminal is connected to the input, and a first voltage is output to the USB storage interface module, the RS485 interface module, and the CAN interface module through a DC-DC conversion module. The first voltage is converted to a second voltage by a low-dropout voltage stabilizing module to supply power to the peripheral circuit of the master module, the CAN interface module, the RS232 module, and the terminal interaction indication module.

[0027] Specifically, as shown in Figure 3 The DC-DC conversion module converts the 12V input of the concentrator terminal to a first voltage 5V, and further converts it to a second voltage 3.3V output through a low-dropout voltage stabilizing module. In order to eliminate the noise interference of the power input end, 105K and 106K capacitors are added to the 12V input end for filtering processing to ensure the stability of the power supply. At the same time, this module does not perform software control and is directly controlled by hardware to maintain a constant open state, ensuring that the module can act quickly and respond in time. This part outputs the first voltage to supply the USB storage interface module, the RS485 interface module, and the CAN interface module, and the second voltage 3.3V powers the peripheral circuit of the master module, the CAN interface module, the RS232 module, and the terminal interaction indication module. The two power supply outputs work cooperatively to maintain the stability of the whole machine power supply, and each module can also maintain normal work at all times.

[0028] The monitoring chip module includes a watchdog chip and peripheral circuitry, used to monitor the operating status of the main control chip. The main control chip sends a sustain signal to the monitoring chip via a serial port to ensure continuous operation of the monitoring chip. Simultaneously, the monitoring chip ensures the normal operation of the main control chip, preventing the device from crashing. Figure 4 As shown, the MCU controls the timer to send intermittent pulse signals. These pulse signals are sent to an RC differentiating circuit, which converts them into spike pulses at the input of the watchdog chip. The watchdog chip receives these spike pulses at pin 12, resetting its internal counter. Its output pin 3 outputs a single low-level signal, connected to the gate of MOSFET QU2. The drain voltage of the MOSFET is 3.3V, creating a 3.3V voltage difference between the gate and drain, turning the MOSFET on. The source voltage is also 3.3V, which is transmitted to the MCU to ensure its normal operation. If the MCU malfunctions, the watchdog chip will not output a signal. In this case, pin 3 will output a high level of 3.3V. The voltage difference between the drain and gate will not meet the MOSFET's conduction condition, preventing the MCU from receiving voltage from the MOSFET's source. The MCU will continuously restart and print logs to monitor the main controller's operating status. The watchdog chip will detect a timeout and trigger a system reset after a preset time, restarting the MCU. The MCU will log detailed information during startup, including the reset reason, timestamp, and possible error codes. These logs can be exported through the debug interface for technicians to analyze and troubleshoot.

[0029] According to an embodiment of the present invention, the monitoring device has sufficient hardware interfaces to meet the various debugging and monitoring requirements of the concentrator terminal, specifically including a USB storage interface module, an RS485 interface module, a CAN interface module, and an RS232 interface module.

[0030] The USB storage interface module is used to store interactive information in real time via USB and supports device upgrades via USB. Specifically, the USB storage interface module is connected to the MCU via a differential USB cable. To prevent hot-plugging of USB, a TVS array is set between the differential USB cable and the MCU. The USB storage interface module stores interactive information via USB.

[0031] like Figure 5As shown in the figure, the RS485 interface module includes an RS485 transmission chip, adopts a three-wire communication mode, and solves the hidden trouble of false triggering level caused by a two-wire mode; in order to prevent the 5V power supply from backflowing and damaging the overall circuit, a level conversion circuit is arranged at the front end of the RS485 transmission chip; at the same time, in order to protect the circuit, a thermal resistance is connected in series on the RS485 bus, and a TVS diode is connected in parallel. Further, according to actual needs, a software control mode can be used to select the switching start of the module.

[0032] As shown in the figure, Figure 6 after the CAN interface module is started, a filter circuit is added, in order to prevent the interference of different power supplies, 5V power supply is used on the isolation side, and 3.3V power supply is used on the system side, the isolation side uses a thermal resistance and a TVS diode, prevents the interface from being misconnected and damaging the circuit, and ensures the stability of the device. Further, according to different actual conditions, a software control mode can be used to select whether to enable the communication mode.

[0033] As shown in the figure, Figure 7 the RS232 interface module is a main debugging interface and is in a constant-on mode, in order to prevent external overvoltage from affecting the rear-stage circuit, a TVS diode is added to the interface, and in order to ensure signal quality, an RC filter circuit is added to the RS232 bus. Specifically, the module uses a 3.3V power supply, and a standard DB-9 interface is used at the interface end, and the wiring is simple and firm.

[0034] The terminal interaction indication module is controlled by the main control chip through an IO port, and this part receives data signals from the main control module to correctly indicate the current interaction state of the device. The terminal interaction indication module includes two groups of indication circuits, a first indication circuit is located between the monitoring device and the concentrator terminal, a first indication lamp in the first indication circuit displays the interaction state between the concentrator terminal and the monitoring device, and a second indication circuit is located between the monitoring device and the carrier routing module, and a second indication lamp in the second indication circuit displays the interaction state between the monitoring device and the carrier routing module.

[0035] Through the two-way state indication circuits, the interaction logic between the terminal and the carrier routing module can be reflected in real time, thereby helping to better judge the current state of the carrier routing and better monitor the current indication state. Specifically, when terminal downlink data is acquired through the monitoring device, the first indication lamp for indicating the running transceiver state of the terminal performs corresponding flashing operation; when the carrier reads data and then uplink interacts through the monitoring device, the second indication lamp for indicating the running transceiver state of the carrier routing module performs corresponding flashing operation.

[0036] The basic principle and main features of the present application are shown and described above, and for those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, so the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, so all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

[0037] In addition, it should be understood that, although the present application is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A carrier routing monitoring device for a State Grid concentrator terminal, for use between a concentrator terminal and a carrier routing module, characterized in that, The application relates to a terminal concentrator, which comprises a master control module, a communication weak terminal row and a carrier routing strong terminal row, wherein the master control module comprises a master control chip MCU, and the master control module is connected with a power management module, a monitoring chip module, a USB storage interface module, an RS485 interface module, a CAN interface module, an RS232 interface module and a terminal interaction indication module; the communication weak terminal row is used for information interaction between a terminal and a carrier routing module; the monitoring device is installed in a carrier routing slot of the concentrator through the carrier routing strong terminal row, an upper end of the monitoring device is connected with the carrier routing module, and three-phase voltage of the concentrator terminal is connected to the monitoring device through the carrier routing strong terminal row and then transmitted to the carrier routing module.

2. The carrier routing monitoring device for the national grid concentrator terminal according to claim 1, characterized in that, The power management module is connected with the concentrator terminal, a first voltage output from a direct current-direct current conversion module is connected to the USB storage interface module, the RS485 interface module and the CAN interface module, a second voltage output from a low-voltage difference stabilizing module is used for power supply of a peripheral circuit of the master control module, the CAN interface module, the RS232 module and the terminal interaction indication module.

3. The carrier routing monitoring device for the national grid concentrator terminal according to claim 1, characterized in that, The monitoring chip module comprises a watchdog chip and a peripheral circuit, a MCU controls a timer to send interval pulse signals, the pulse signals are sent to an RC differential circuit, the RC differential circuit converts the pulse signals into spike pulses of an input end of the watchdog chip, the watchdog chip receives the spike pulses, resets an internal counter, and outputs a single low-level signal at an output end, the low-level signal is connected with a gate of a MOS tube, a drain of the MOS tube is connected with a 3.3V power supply, and a source of the MOS tube is connected with the MCU.

4. The carrier routing monitoring device for the national grid concentrator terminal according to claim 1, characterized in that, The USB storage interface module is connected with the MCU through a differential USB line, a TVS array is arranged between the differential USB line and the MCU, and the USB storage interface module exchanges information through USB storage.

5. The carrier routing monitoring device for the national grid concentrator terminal according to claim 1, characterized in that, The RS485 interface module comprises an RS485 transmission chip, adopts a three-wire communication mode, a level conversion circuit is arranged at a front end of the RS485 transmission chip, a thermistor is connected in series on an RS485 bus, and a TVS diode is connected in parallel.

6. The carrier routing monitoring device for the national grid concentrator terminal according to claim 1, characterized in that, The CAN interface module is provided with a filter circuit, 5V power supply is used on an isolation side, 3.3V power supply is used on a system side, and a thermistor and a TVS diode are used on the isolation side.

7. The carrier routing monitoring device for the national grid concentrator terminal according to claim 1, characterized in that, The RS232 interface module is a main debugging interface and is in a normal open mode, a TVS diode is added to the interface, and an RC filter circuit is added to an RS232 bus.

8. The carrier routing monitoring device for the national grid concentrator terminal according to claim 1, characterized in that, The terminal interaction indication module comprises two groups of indication circuits, a first indication circuit is arranged between the monitoring device and the concentrator terminal, a first indication lamp in the first indication circuit shows an interaction state between the concentrator terminal and the monitoring device, a second indication circuit is arranged between the monitoring device and the carrier routing module, and a second indication lamp in the second indication circuit shows an interaction state between the monitoring device and the carrier routing module.

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