A wired network monitoring device intelligent monitoring terminal

Abstract

The utility model discloses a kind of wired network monitoring equipment intelligent monitoring terminal, it is related to network equipment maintenance technical field.The terminal includes intranet single-chip microcontroller, extranet single-chip microcontroller, one-way photoelectric isolation transmission module, power module, RJ45 interface module, mains detection module, switch drive circuit and 4G communication module.Intranet single-chip microcontroller is connected wired network switch through RJ45 interface module, sends PING instruction and monitors network state;Extranet single-chip microcontroller is responsible for power monitoring, remote control and data interaction;One-way photoelectric isolation transmission module realizes the one-way data transmission and electrical isolation of intranet and extranet;Power module supports mains and battery automatic switching.Terminal can accurately identify mains interruption, network cable loosening and other fault types, support remote restart, guarantee intranet security, improve operation and maintenance efficiency.

Description

Technical Field

[0001] This utility model relates to the field of network equipment maintenance technology, and in particular to an intelligent monitoring terminal for wired network monitoring equipment. Background Technology

[0002] With the deepening of smart city and safe city projects, the deployment scale of wired network monitoring equipment (such as high-definition cameras, network switches, signal acquisition terminals, etc.) has exploded. These devices are widely used in scenarios such as traffic checkpoints, community security, road monitoring, and park management, forming complex monitoring networks with wide coverage and numerous nodes. Most of these devices are deployed in intranet environments, using wired local area networks to construct star or tree topologies, undertaking the core functions of real-time data acquisition and transmission.

[0003] However, the existing maintenance model for wired network monitoring equipment has significant shortcomings: The fault type identification is unclear: when the equipment is abnormal, it only shows that it is "offline" or "communication interrupted", and it is impossible to distinguish the specific cause of the fault. For example, the power supply failure caused by the sudden interruption of the mains power, the network connection problem caused by the loose network cable interface, the operation failure caused by the core chip of the equipment crashing, or the power supply abnormality caused by the power module damage, which brings blindness to the maintenance.

[0004] Low maintenance response efficiency: Due to the unknown cause of the fault, maintenance personnel need to carry a large number of spare parts to the site for troubleshooting. Often, due to incompatible tools or spare parts, multiple trips are required, which prolongs the fault repair cycle. Especially for equipment in remote areas or complex environments (such as high altitudes or tunnels), the on-site maintenance cost is extremely high.

[0005] Lack of proactive monitoring and data support: Existing systems mostly rely on manual inspections or passively wait for fault alarms, lacking automated fault recording and trend analysis functions. This makes it difficult to summarize high-frequency fault patterns (such as equipment in a certain area frequently crashing due to high temperature, or a certain type of switch being easily damaged due to voltage fluctuations), resulting in unreasonable allocation of maintenance resources and persistently high long-term maintenance costs.

[0006] Internal network security risks exist: Some monitoring devices need to communicate with the backend platform through public network modules (such as 4G) to achieve remote alarms. However, in traditional designs, there is a lack of physical isolation between the internal network and the external network, which may allow public network security threats (such as malicious attacks and data leaks) to penetrate into the core internal network, endangering the information security of the monitoring network.

[0007] Therefore, in response to the pain points of "difficult fault diagnosis, slow response, high cost and weak security" in the maintenance of wired network monitoring equipment, there is an urgent need for an intelligent monitoring terminal that can accurately identify fault types, support remote interaction, ensure intranet security and adapt to complex power supply environments, so as to improve operation and maintenance efficiency and reduce management costs. Utility Model Content

[0008] This utility model aims to solve the problems of "unclear fault type, blind maintenance, low efficiency" and intranet security risks in the fault maintenance of wired network monitoring equipment, and provides an intelligent monitoring terminal that integrates accurate diagnosis, remote control, security isolation and continuous power supply functions.

[0009] To achieve the above objectives, this utility model provides an intelligent monitoring terminal for wired network monitoring equipment, the specific technical solution of which is as follows: The core components of this terminal include: Intranet microcontroller system: As the core of intranet monitoring, it directly connects to the wired network switch through the RJ45 interface module, and sends a PING command to the monitored device (such as camera, HD camera, network switch, signal acquisition device) every 2-4 seconds, records the response status, packet loss rate and other information to determine network connectivity; at the same time, it supports local data debugging and storage expansion through the USB interface.

[0010] External network microcontroller system: As the external control core, it connects to the mains power detection module (collecting mains voltage, current, and power), switch drive circuit (controlling the on / off state of the electronic switch), 4G communication module (interacting with the monitoring center and mobile phone), and temperature sensor (monitoring ambient temperature) to realize power monitoring, remote restart, and data upload.

[0011] Unidirectional isolation and data transmission: The unidirectional opto-isolation transmission module, composed of PC817 optocouplers, only allows the internal network microcontroller to transmit data (such as PING command results and internal network status codes) to the external network microcontroller, physically isolating the internal network from the external network and blocking the public network intrusion path.

[0012] Power Module: Includes an AC-DC power module (input AC85-265V, output DC24V), a battery charging circuit, and a battery (two 12V batteries in series output DC24V). It supports two power supply schemes: Scheme 1: Automatic switching between AC power and battery power is achieved through diodes D1 and D2 (AC-DC power supply and charging when AC power is normal, and battery power supply when interrupted); Scheme 2: The output of the AC-DC power module is only connected to the battery charging circuit (LM317) and is not directly connected to the DC24V main power supply terminal; the DC24V main power supply terminal is only connected to the battery output terminal (via D2 and Q2). Physical isolation ensures that the AC-DC module only undertakes the charging function and avoids interference to the main power supply terminal.

[0013] The DC24V base power provided by the power module is converted to 3.3V by a DC-DC conversion module (such as MP2307) to power low-voltage modules such as intranet microcontrollers and extranet microcontrollers.

[0014] Compared with the prior art, this utility model has the following significant advantages: (1) Accurately identify fault types: By analyzing the results of the PING command of the intranet microcontroller and the mains power parameters collected by the external network microcontroller, it is possible to clearly distinguish power supply faults (mains power interruption, power supply damage), network faults (loose network cable, main network fault) and equipment faults (crash), thus avoiding maintenance personnel from blindly going to the site.

[0015] (2) Ensure intranet security: The one-way opto-isolation transmission module realizes physical isolation between the intranet and the external network, allowing only intranet data to be transmitted to the outside, eliminating the possibility of the 4G communication module (connected to the public network) transmitting data to the intranet, thus preventing public network security threats from the hardware layer.

[0016] (3) Improve maintenance efficiency: Support remote restart function. After receiving the instruction through the 4G communication module, control the internal network equipment to power off and restart synchronously, and quickly verify temporary crash faults; based on the accurate fault type, matching technicians can be dispatched in a targeted manner to shorten the maintenance cycle.

[0017] (4) Enhanced scenario adaptability: Equipped with a battery and automatic switching circuit, the terminal can continue to work and report faults when the mains power is interrupted. It is suitable for remote areas and scenarios with unstable power supply, ensuring uninterrupted monitoring.

[0018] (5) Optimize operation and maintenance management: Automatically record data such as fault type, occurrence time, and handling results to provide data support for maintenance strategy optimization, facilitate the summarization of high-frequency fault causes, reasonable allocation of resources, and reduction of long-term operation and maintenance costs. Attached Figure Description

[0019] Figure 1 This is a structural block diagram of the intelligent monitoring terminal of the wired network monitoring equipment of this utility model; Figure 2 This utility model provides a 24V DC power supply backup and automatic switching circuit. Figure 3 This utility model is a unidirectional isolation circuit based on a PC817 optocoupler; Figure 4 This invention relates to a switch drive circuit.

[0020] Figure 1 In the diagram: 1-External network microcontroller, 2-Internal network microcontroller, 3-PC817 optocoupler, 4-RJ45 interface module, 5-Wired network switch, 6-USB interface, 7-Main power detection module, 8-Main power switch control circuit, 9-4G communication module, 10-Sensor drive circuit, 11-220V mains power, 12-Main power terminal block, 13-Internet, 14-Monitoring center, 15-Monitoring mobile phone, 16-AC-DC power supply module, 17-Battery charging circuit, 18-Battery, 19-Temperature sensor.

[0021] Figure 2 In the middle: D1 - Schottky diode (1N5819), Q1 - N-channel MOSFET (SI2302), R1 - pull-down resistor (10KΩ), C1 - filter capacitor (0.1uF).

[0022] Figure 3 In the middle: Pins 1 and 2 - LED, Pins 3 and 4 - Phototransistor, OC - Optocoupler (PC817), R2 - Current limiting resistor (1KΩ), R3 - Pull-up resistor (10KΩ), VCC1 - Power supply (3.3V).

[0023] Figure 4 In the middle: KM - Relay (HF165FD), Q2 - NPN transistor (NPN - BCE), D2 - Freewheeling diode (SS520), R4 - Pull-up resistor (3.3KΩ), R5 - Current limiting resistor (1KΩ). Detailed Implementation

[0024] Combined with appendix Figure 1 , Figure 2 , Figure 3 , Figure 4 The specific composition and structure of this utility model are described in detail below: 1. Core Control Module The intranet microcontroller uses an STM32F407VET6 (Cortex-M4 core, 168MHz clock speed, 1MB Flash, 192KB RAM) and supports Ethernet interface expansion. It connects to the RJ45 interface module via an Ethernet PHY chip (LAN8720A) and to the USB interface (USB 2.0 Type-C) via GPIO. A built-in timer triggers a PING command every 3 seconds. The command is sent to the wired network switch via the RJ45 interface module, and the response signal is processed and sent to the unidirectional opto-isolated transmission module via the UART interface.

[0025] External network microcontroller: Uses STM32F407VET6, which connects to a unidirectional opto-isolated transmission module (receiving data from the internal network), a 4G communication module, a mains power detection module, and a switch driver circuit via a UART interface; the built-in ADC module collects temperature sensor signals transmitted by the sensor driver circuit. The temperature sensor is connected to the external network microcontroller through the sensor driver circuit to monitor the ambient temperature and trigger the external network microcontroller to perform alarm or control operations when the temperature exceeds the threshold.

[0026] 2. Isolation and Communication Module Unidirectional opto-isolated transmission module: Utilizing a PC817 optocoupler, a unidirectional isolation circuit is constructed. The anode of the LED is connected to the PA0 pin of the internal microcontroller via a 1kΩ current-limiting resistor, driven by its high-level output signal; the cathode is connected to the internal microcontroller's GND. The collector of the phototransistor is connected to an independent 3.3V DC power supply (VCC) via a 10kΩ pull-up resistor. The collector lead is connected to the PB0 pin of the external microcontroller for input signal detection, and the emitter is connected to the external microcontroller's GND. This achieves unidirectional conversion of "internal TTL signal → optical signal → external TTL signal," with an optocoupler isolation voltage ≥5000V (see attached diagram). Figure 3 ) RJ45 interface module: Uses HR911105A network transformer, pins 1-4 and 5-8 are connected to the corresponding pins of the wired network switch, and the center tap is grounded and filtered through a 0.1μF capacitor; the data transceiver pins (TX+, TX-, RX+, RX-) are connected to the Ethernet PHY chip (LAN8720A) of the intranet microcontroller, supporting 10 / 100Mbps adaptive communication.

[0027] 4G Communication Module: Utilizes Quectel EC200S (LTE Cat1 network), connecting to an external microcontroller via a UART interface (115200 baud rate), and an external IoT card via a SIM card interface. Communication with the monitoring center (TCP server) and the monitoring mobile phone (dedicated APP) is achieved via the internet through an antenna, with typical data transmission latency ≤1 second. The 4G communication module supports the TCP / IP protocol, establishing a connection with the monitoring center's TCP server through this protocol to achieve data interaction and command transmission.

[0028] 3. Power Supply and Detection Module Mains power detection module: It adopts the HLW8012 power metering chip, which collects the 220V mains current signal through the current transformer TA1005M, and collects the voltage signal through the resistor voltage divider network (composed of 1MΩ and 100kΩ resistors in series). The chip's built-in ADC converts the analog signal into a frequency signal, which is output to the external network microcontroller's TIM2 and TIM3 pins through the CF1 and CF pins to calculate the voltage (accuracy ±0.5%), current (accuracy ±1%), and power (accuracy ±1%).

[0029] AC-DC power module: Uses Mean Well LRS-100-24, input AC85-265V, output DC24V / 4.2A, efficiency ≥89%, operating temperature -30℃ to +70℃; output terminal series diode D1 (1N5819, forward voltage drop 0.4V) to prevent reverse discharge of the battery (included). Figure 2 ).

[0030] Battery: Two 12V / 100Ah lead-acid batteries (model 6-QW-100) are connected in series to output DC24V; the output terminal is connected in series with diode D2 (1N5819), and together with the output terminal of D1, it is connected to the DC24V power supply terminal (converted to 3.3V by DC-DC module MP2307 for use by microcontroller); the battery charging circuit uses LM317 linear regulator to stabilize the AC-DC output of 24V to 27V (standard charging voltage of lead-acid battery), which is suitable for the charging needs of 12V series lead-acid batteries.

[0031] Temperature sensor: DS18B20 (measurement range -55℃ to +125℃, accuracy ±0.5℃) is used. It is connected to the PA2 pin of the microcontroller on the external network through the sensor driver circuit (including a 10kΩ pull-up resistor) and collects the ambient temperature every 10 seconds.

[0032] 4. Control Execution Module The control execution module, centered on a normally closed AC contactor KM, is responsible for responding to control commands from the external microcontroller and precisely controlling the power supply to the 220V AC mains terminal block, ensuring intelligent power management of the tested equipment. The module's operating logic is closely linked to the overall system's fault diagnosis and remote maintenance. Its detailed structure and operating mechanism are as follows (in conjunction with...). Figure 4 ): 4.1 Core Component: Normally Closed AC Contactor KM The selected AC contactor KM (model: CJX2-1210, rated current 12A) features normally closed main contacts. In the default state (coil not energized), the main contacts L1-T1 remain closed, allowing seamless connection of the 220V AC mains power to the mains terminal block, providing continuous power to the tested equipment (such as the Huawei S5720 switch and the Hikvision DS-2CD3T46 camera). This normally closed design meets the equipment's requirement for "stable operation under normal conditions," greatly reducing the risk of unexpected power outages due to control circuit malfunctions, and is particularly suitable for the stringent requirements of continuous operation in frigid northern regions. Main contacts (L1-T1): As the key connection point between the 220V mains power and the mains power terminal block, they maintain continuity under normal conditions, allowing current to flow freely and ensuring uninterrupted power supply to the equipment; only when the coil is energized and triggered, the main contacts quickly disconnect, cutting off the mains power supply. Coil (A1-A2): As the execution end of the control signal, when not energized, the contactor maintains the normally closed main contacts closed; when it receives the drive current output from the ULN2003 Darlington tube, the coil generates a strong magnetic field, overcomes the internal spring resistance, pulls the armature to move, and then drives the main contacts L1-T1 to separate, thereby realizing the circuit cut-off. 4.2 Driving Circuit: ULN2003 Darlington Transistor Array The ULN2003 Darlington transistor array plays a crucial role in amplifying low-voltage signals in the control execution module. It is responsible for converting the low-level, low-current control signals output by the external microcontroller into high-level, high-current signals sufficient to drive the AC contactor coil, ensuring the reliable execution of control commands. Input Connection: The input terminal of the ULN2003 is directly connected to the PB1 pin of the external microcontroller, and a 1KΩ current-limiting resistor R1 is connected in series. The current-limiting resistor R1 effectively prevents damage due to excessive output current from the microcontroller pin and stabilizes the signal current input to the ULN2003, ensuring its operational stability. During normal operation, the PB1 pin of the external microcontroller outputs a low-level signal, and the Darlington transistor inside the ULN2003 is in the off state, with no current output. Output Connection: The output terminal of the ULN2003 is tightly connected to the A1 pin of the AC contactor coil, providing drive current to the coil. When the external microcontroller controls the PB1 pin to output a high level based on equipment fault diagnosis (such as detecting a device crash) or receiving a remote restart command, the signal is current-limited by R1, triggering the Darlington transistor inside the ULN2003 to conduct, forming a circuit. The output current drives the contactor coil to energize, triggering the main contacts to operate. 4.3 Control Signals: External Network Microcontroller (1) The external microcontroller acts as the "brain" of the control and execution module. Based on the system's preset logic and real-time monitoring data, it precisely regulates the PB1 pin level and indirectly controls the power supply to the mains terminal block through the circuit cooperation of transistors and relays.

[0033] Normal power supply control (equipment operating normally) When the device is working normally, the external microcontroller continuously outputs a low level to the PB1 pin through program logic. At this time: Transistor Q1 (NPN type) is cut off because there is insufficient driving current at its base, and no current flows through the relay K1 coil (24V power supply circuit); The normally closed contact of relay K1 remains closed, and the 220V mains power is connected to the "mains terminal block (13)" through the contact to ensure a stable power supply to the tested equipment.

[0034] Power failure control (fault / restart triggered) When the external microcontroller detects a device malfunction (such as continuous PING failure indicating a system crash), or receives a remote restart command, it executes a "power-off procedure": The microcontroller controls the PB1 pin to output a high level, which, after being current-limited by R2, drives the transistor Q1 to conduct; When the coil of relay K1 is energized (24V circuit is connected), the normally closed contact is disconnected by electromagnetic force, the connection between the "mains terminal block (13)" and the 220V mains power (11) is cut off, and the equipment stops supplying power.

[0035] Restore power supply control (restart after power failure) After the preset power-off delay (e.g., 4 seconds) is completed, the external microcontroller controls the PB1 pin to return to a low level. When transistor Q1 is cut off, the coil of relay K1 is de-energized, and the magnetic field disappears. The normally closed contact of the relay is reset and closed under the action of the internal spring force, the mains terminal block is reconnected to 220V mains power, the equipment restarts, and one "power-off-recovery" control cycle is completed.

[0036] Mains power supply board: The industrial power supply board with overload protection (model Delixi CDEN6-10, rated current 10A) is adopted. The output end is connected to the device under test (such as Huawei S5720 switch, Hikvision DS-2CD3T46 camera) to realize centralized power supply and on / off control of the device under test.

[0037] 5. Power switching circuit (see attached figure 2) The circuit consists of an AC-DC power supply module (17), a battery (19), a diode D1 (1N5819), an N-channel MOSFET Q2 (SI2302), a pull-down resistor R1 (10KΩ), and a filter capacitor C1 (0.1μF), realizing the automatic switching logic between AC-DC power supply and battery power.

[0038] When the mains power is normal (AC-DC power supply takes priority) The AC-DC power module outputs 24V, which is then supplied to the "DC24V power supply terminal" via diode D1 (1N5819). D1 is turned on due to forward voltage, providing the main power supply to the system; At this time, the voltage of the "DC24V power supply terminal" is higher than the voltage of the battery (19). The gate (G) of the N-channel MOSFET Q2 (SI2302) is grounded through the pull-down resistor R1. The gate-source voltage (Vgs) has not reached the conduction threshold, and Q2 is in the off state to prevent the battery from discharging in reverse to the "DC24V power supply terminal". At the same time, AC-DC power can be used through this path to charge the battery in conjunction with an external charging circuit (not fully shown in the figure and needs to be added in practice) (if the design includes charging function).

[0039] When the mains power is interrupted (the battery provides seamless power replenishment). When the AC-DC power supply fails, the voltage at the "DC24V power supply terminal" drops: The battery (19) voltage is forward-biased through the body diode (internal parasitic) of Q2, initially maintaining the "DC24V power supply terminal" voltage; As the voltage changes, the gate (G) of Q2 remains grounded through R1, the source (S) voltage is the battery voltage, and the drain (D) is connected to the "DC24V power supply terminal". At this time, the gate-source voltage (Vgs) meets the N-channel MOSFET turn-on condition, and Q2 is fully turned on. The battery directly supplies power to the "DC24V power supply terminal" through Q2, reducing output impedance and voltage loss. Together with the filter capacitor C1, it filters out high-frequency noise and ensures stable power supply. At the same time, D1 is reverse cutoff, isolating the AC-DC terminal failure voltage, realizing the switching of "AC-DC power failure → seamless battery replacement".

[0040] Working principle and operating procedures 1. Working principle Terminals achieve intelligent operation and maintenance through a closed loop of "monitoring-analysis-response": Monitoring layer: The intranet microcontroller sends a PING command to the wired network switch and the downstream monitored device every 3 seconds, and records the response status (response time <100ms is normal, response time ≥100ms with a response is a delay abnormality, no response is an interrupt abnormality). After processing, the data is sent to the external network microcontroller through the PC817 optocoupler. The external microcontroller collects the mains voltage (normal range AC198-242V), current and power in real time through the mains power detection module, and collects the ambient temperature (threshold -30℃~+60℃) through the DS18B20.

[0041] Analysis layer: The external microcontroller logically associates network data with power data: If the PING response is normal and the mains power parameters are normal: the equipment is not faulty, and the data is uploaded to the monitoring center via the 4G module; If there is no response to PING and the mains voltage detection value is 0 (i.e., mains power interruption): it is determined that the mains power is interrupted and a level 1 alarm is triggered. If there is no response to PING but the mains power parameters are normal: further check the communication status between the intranet microcontroller and the wired network switch. If the physical connection between the intranet microcontroller and the wired network switch (the link signal through the RJ45 interface module) is interrupted, it is determined that the network cable between the terminal and the switch is loose (level 2 alarm). If the connection is normal but the device under test does not respond, it is determined that the device under test is frozen (level 3 alarm). If the temperature exceeds the threshold: trigger a temperature alarm and control the operation of external heat dissipation / heating equipment.

[0042] Response layer: After receiving the alarm, the monitoring center sends a command via the 4G module: Equipment crash: The monitoring center sends a "remote restart" command. After receiving the command, the microcontroller on the external network controls the switch drive circuit to disconnect the power switch, thereby interrupting the mains power input of the monitored equipment and terminal (both internal and external network equipment are powered off). After a 4-second delay, the control switch drive circuit closes the power switch to restore 220V power supply. Abnormal temperature: Send a "start / stop heat dissipation / heating" command, and the external microcontroller will control the corresponding device to work.

[0043] 2. Operating Procedures (1) Equipment deployment: Connect the RJ45 interface module to an unused port on the wired network switch using a Cat5e cable. Connect the 220V AC power supply to the input terminal of the AC power detection module and the input terminal of the power control switch. Connect the output terminal of the power control switch to the AC power terminal block. Connect the terminal block to the device under test. The battery is connected to the battery charging circuit, and the 4G communication module is inserted into the IoT card and connected to an external high-gain antenna. After power is turned on, the terminal automatically initializes (about 30 seconds), the intranet microcontroller sends a PING command, the extranet microcontroller starts data acquisition, and the 4G module automatically connects to the Internet and registers with the monitoring center.

[0044] (2) Routine monitoring: Under normal conditions, the terminal uploads status data (PING response rate, mains voltage / current, ambient temperature) to the monitoring center every 5 minutes. The monitoring center platform displays the equipment status in real time (green for normal, red for alarm), automatically stores historical data (for 1 year), and supports data export and trend analysis.

[0045] (3) Troubleshooting: Equipment crash alarm: ① After receiving the alarm, the monitoring center sends a "remote restart" command through the platform; ② The external network microcontroller receives the instruction, controls the switch drive circuit to output a low level, the electric control switch is opened, and the mains power input of the tested device and terminal is interrupted (both internal and external network devices are powered off). ③ After a 4-second delay, the external microcontroller control switch drive circuit outputs a high level, the electronic switch is activated, and the 220V mains power supply is restored; ④ Within 3 minutes after restarting, the intranet microcontroller continuously sends PING commands to the device under test. If the response is restored, the fault is determined to be resolved; otherwise, it is upgraded to "hardware fault" and the on-site maintenance personnel are notified.

[0046] Mains power outage alarm: ① The terminal automatically switches to battery power and reports the status of mains power restoration to the monitoring center every 10 minutes; ② The monitoring center dispatches an electrician to the site with emergency power supply equipment (such as a generator); after the mains power is restored, the terminal automatically switches to AC-DC power supply module and stops alarming.

[0047] (4) Maintenance cycle: The battery capacity is tested every 6 months by connecting it to a computer via USB (running dedicated testing software); Renew your subscription or change your data plan regularly based on your data usage (choose an industrial-grade high-data plan that supports ≥1GB of data transfer per month). The insulation resistance of AC-DC power modules and electrical control switches shall be tested every two years (the insulation resistance shall be ≥10MΩ) to ensure electrical safety.

[0048] The above specific embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit the scope of protection of this utility model. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model do not depart from the essence and scope of the technical solution of this utility model.

Claims

1. An intelligent monitoring terminal for wired network monitoring equipment, characterized in that, It includes an intranet microcontroller (2), an extranet microcontroller (1), a unidirectional opto-isolated transmission module (3), a power supply module, an RJ45 interface module (4), a mains power detection module (7), a switch drive circuit (8), and a 4G communication module (9); The intranet microcontroller (2) is connected to the wired network switch (5) through the RJ45 interface module (4) to send PING commands to monitor the network status; The external network microcontroller (1) is connected to the mains power detection module (7), the switch drive circuit (8) and the 4G communication module (9) respectively, and is used to monitor mains power parameters, control remote restart and interact with the monitoring center (15); The unidirectional opto-isolated transmission module (3) connects the intranet microcontroller (2) and the external network microcontroller (1) to realize unidirectional data transmission and electrical isolation; The power module includes an AC-DC power module (17), a battery charging circuit (18), and a battery (19), providing DC24V basic power supply for each module.

2. The intelligent monitoring terminal for wired network monitoring equipment according to claim 1, characterized in that, The unidirectional opto-isolated transmission module (3) uses a PC817 optocoupler, with its LED side connected to the internal network microcontroller (2) and its phototransistor side connected to the external network microcontroller (1).

3. The intelligent monitoring terminal for wired network monitoring equipment according to claim 1, characterized in that, The power module supports two power supply schemes: Option 1: The AC-DC power module (17) and the battery (19) are connected to the DC24V main power supply terminal through diodes D1 and D2. When the mains power is normal, the AC-DC power module provides power, and when the mains power is interrupted, the battery automatically switches to power supply. Option 2: The AC-DC power module (17) supplies power to the battery (19) only through the battery charging circuit (18), and each module is powered by the battery (19).

4. The intelligent monitoring terminal for wired network monitoring equipment according to claim 1, characterized in that, The switch drive circuit (8) is connected to the electronic control switch (12), which is connected in series in the power supply circuit between the 220V mains power (11) and the device under test, and is used to control the power supply of the device under test.

5. The intelligent monitoring terminal for wired network monitoring equipment according to claim 1, characterized in that, It also includes a temperature sensor (20), which is connected to the external network microcontroller (1) through a sensor driving circuit (10) to monitor the ambient temperature and trigger the external network microcontroller to perform alarm or control operations when the temperature exceeds the threshold.

6. The intelligent monitoring terminal for wired network monitoring equipment according to claim 1, characterized in that, The mains power detection module (7) uses the HLW8012 power metering chip to collect the voltage, current and power parameters of the mains power.

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