An RJ45 control circuit and method for an optical network conversion panel

Abstract

The present invention discloses an RJ45 control circuit and method for an optical network conversion panel, relating to the technical field of RJ45 interfaces. The RJ45 control circuit and method for the optical network conversion panel include a monitoring circuit and a conversion circuit, characterized in that the monitoring circuit includes an FTLX8571D3BCL optical transceiver chip and an STM32 microcontroller, wherein the UART_TX pin of the FTLX8571D3BCL optical transceiver chip is connected to the PA9 pin of the STM32 microcontroller, and the UART_RX pin is connected to the PA10 pin of the STM32 microcontroller. The RJ45 control circuit and method for the optical network conversion panel achieve flexible switching of network cable transfer modes through the coordination of an H1102NL network transformer, a common-mode choke, and an RJ45 interface. Furthermore, through the coordination of multiple components such as a rectifier bridge, an LM2596 conversion chip, and an STM32 microcontroller, the control circuit achieves stable power supply both in normal and power-off modes.

Description

Technical Field

[0001] The present invention relates to the technical field of RJ45 interfaces, and in particular to an RJ45 control circuit and method for an optical network conversion panel. Background Art

[0002] With the rapid development of internet technology, the scale and speed requirements for network data transmission continue to rise. Fiber optic communications, with its exceptional high speed, large capacity, and low loss, have become a core element of modern network infrastructure. Across numerous network applications, whether it's massive data exchange in data centers, efficient information flow in corporate offices, or high-speed broadband access for home networks, fiber optic networks are becoming increasingly widespread.

[0003] In traditional fiber optic access panel technology solutions, the mode in which fiber optic signals are converted and then transferred to network cables is relatively fixed. Most devices can only implement a single setting for the number of network cables that can be transferred, that is, they can only transfer one network cable or can only transfer two network cables. For example, in some scenarios where the network bandwidth demand is low and only a single terminal device needs to be connected, if a device that can only transfer two network cables is used, not only will network cable resources be wasted, but the existence of redundant lines may also introduce unnecessary signal interference and increase costs; conversely, in some scenarios where the network bandwidth demand is high and multiple devices need to be connected simultaneously, if the device can only transfer one network cable, it will not be able to meet the data transmission needs, seriously restricting the performance of the network and the normal operation of the business. Summary of the Invention

[0004] Technical solution: In view of the shortcomings of the existing technology, the present invention provides an RJ45 control circuit and method for an optical network conversion panel, which solves the technical problems of the traditional optical fiber access panel in terms of poor flexibility in network cable switching and a single power supply mode.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] An RJ45 control circuit for an optical network conversion panel includes a monitoring circuit and a conversion circuit, characterized in that: the monitoring circuit includes an FTLX8571D3BCL optical transceiver chip and an STM32 microcontroller, the UART_TX pin of the FTLX8571D3BCL optical transceiver chip is connected to the PA9 pin of the STM32 microcontroller, the UART_RX pin is connected to the PA10 pin of the STM32 microcontroller, and the configuration of the optical transceiver chip parameters and the acquisition of its working status feedback information are realized through a serial communication connection to ensure stable access and processing of optical fiber signals; the conversion circuit includes a BCM54616 network processor chip, an H1102NL network transformer, and a The device comprises a common-mode choke, a second common-mode choke and at least one RJ45 interface, wherein the SPI_CLK, SPI_MISO and SPI_MOSI pins of the BCM54616 network processor chip are respectively connected to the PB13, PB14 and PB15 pins of the STM32 microcontroller for receiving configuration instructions and data interaction from the STM32 microcontroller; the FTLX8571D3BCL optical transceiver chip converts the received optical fiber signal into an electrical signal and transmits it to the BCM54616 network processor chip for data processing and protocol conversion; the TXD0-TXD6 pins of the BCM54616 network processor chip are sequentially connected to the 1102NL pins of the H1102NL network transformer. The primary winding pin 1 is connected to the primary winding pin 7, and the RXD0-RXD6 pins are connected to the secondary winding pin 8 and the primary winding pin 14 of the H1102NL network transformer in sequence; when a single network cable transfer is performed, in response to the single network cable transfer control signal issued by the STM32 microcontroller, the BCM54616 network processor chip selectively directs the processed signal to a group of lines connected to the RJ45 interface, and the TX+ pin and TX- pin on the RJ45 interface are respectively connected to the first pin and the third pin of the first common mode choke, the RX+ pin and the RX- pin are respectively connected to the first pin and the third pin of the second common mode choke, and the second and fourth pins of the first common mode choke are respectively connected to the The secondary winding pin 10 and the secondary winding pin 13 on the H1102NL network transformer are connected, and the second and fourth pins of the second common-mode choke coil are respectively connected to the secondary winding pin 11 and the secondary winding pin 12 on the H1102NL network transformer to convert the optical fiber signal into an electrical signal suitable for single network cable transmission and output it; when dual network cable switching is performed, in response to the dual network cable switching control signal issued by the STM32 microcontroller, the BCM54616 network processor chip respectively directs the processed signal to two groups of lines connected to the RJ45 interface, so that both RJ45 interfaces can output the converted network signal, thereby realizing the conversion of the optical fiber signal into electrical signals suitable for transmission over two network cables and outputting them.

[0007] Preferably, the power supply circuit is provided with a rectifier bridge and an LM2596 conversion chip. The AC2 pin of the rectifier bridge is connected to the POE pin of the RJ45 interface. The rectifier bridge is used to convert the AC power from the POE pin of the RJ45 interface into DC power. The DC output terminal AC1 of the rectifier bridge is connected to the Vin pin of the LM2596 conversion chip, and the Vout pin of the LM2596 conversion chip is connected to the power distribution circuit input terminal of the optical network conversion panel.

[0008] Preferably, the monitoring circuit is also provided with an LM35 temperature sensor, a HIH-4000 humidity sensor and an AD8318 electromagnetic interference sensor, wherein the Vout pin of the LM35 temperature sensor is connected to the PA0 pin of the STM32 microcontroller, for transmitting the collected temperature analog signal to the STM32 microcontroller; the OUT pin of the HIH-4000 humidity sensor is connected to the PA1 pin of the STM32 microcontroller, for transmitting the humidity-related analog signal detected by the humidity sensor to the STM32 microcontroller, and the AD8318 electromagnetic interference sensor is connected to the PA2 pin of the STM32 microcontroller through the OPA695 broadband amplifier to detect the electromagnetic interference signal intensity around the optical network conversion panel. After the signal is amplified by the OPA695 broadband amplifier, it is transmitted to the STM32 microcontroller, and the STM32 microcontroller determines the degree of electromagnetic interference based on the received signal.

[0009] Preferably, an optical signal strength monitoring circuit is also provided in the monitoring circuit, and an S120C optical power detector is provided in the optical signal strength monitoring circuit. The VCC pin of the S120C optical power detector is connected to a 5V power supply, the GND pin is grounded, and the OUT pin is connected to the PA3 pin of the STM32 microcontroller through a signal conditioning circuit.

[0010] Preferably, an OLED display screen, the VCC pin of the OLED display screen is connected to a 3.3V power supply, and the GND pin is grounded; the SCL pin is connected to the PB3 pin of the STM32 microcontroller, the MOSI pin is connected to the PB5 pin of the STM32 microcontroller, and the reset pin RST of the display screen is connected to the PB4 pin of the STM32 microcontroller for initializing the display screen control.

[0011] Preferably, capacitors are connected in parallel on the connection lines between the TXD0-TXD6 pins of the BCM54616 network processor chip and the primary winding pin 1-primary winding pin 7 of the H1102NL network transformer, and the negative electrodes of the capacitors are grounded.

[0012] Preferably, ESD protection diodes are connected in parallel on the connection lines between the RXD0-RXD6 pins of the BCM54616 network processor chip and the secondary winding pin 1-secondary winding pin 7 of the H1102NL network transformer, and the cathode of the ESD protection diode is grounded.

[0013] Preferably, a 0.1μF capacitor C24 is added between the Vin pin of the LM2596 conversion chip and the ground close to the chip, one end of the capacitor is connected to the Vin pin and the other end is grounded for high-frequency decoupling, and a precision resistor divider is connected to the FB pin of the LM2596 conversion chip. The precision resistor divider includes two series resistors, and one end of the precision resistor divider is connected to the FB pin and the other end is grounded. The EN pin of the LM2596 conversion chip is connected to the PB6 pin of the STM32 microcontroller, and a Schottky diode and an inductor are connected in series between the Vout pin of the LM2596 conversion chip and the output end of the power distribution circuit, and a filtering network composed of multiple capacitors is connected in parallel.

[0014] Preferably, the photosensitive surface of the S120C optical power detector faces the optical output path or the optical fiber output port of the optical transceiver chip.

[0015] An RJ45 control method for an optical network conversion panel includes the following steps:

[0016] Startup and self-test phase: The STM32 microcontroller first executes the startup program to initialize and configure its internal registers and clocks. It then sequentially checks whether the hardware connections with the FTlx8571D3BCL optical transceiver chip, BCM54616 network processor chip, LM2596 converter chip, and various sensors (including the LM35 temperature sensor, HIH-4000 humidity sensor, AD8318 electromagnetic interference sensor, and S120C optical power detector) and the OLED display are normal. If there is a connection failure, the corresponding error code or prompt message will be displayed on the OLED display.

[0017] S2, data acquisition and environmental monitoring stage; the STM32 microcontroller simultaneously starts the data acquisition threads for multiple sensors; through the connection with the LM35 temperature sensor, the temperature analog signal is read according to the set sampling frequency and converted into a digital temperature value; the humidity analog signal transmitted by the HIH-4000 humidity sensor is processed in the same way to obtain the current environmental humidity information; for the AD8318 electromagnetic interference sensor, the electromagnetic interference signal amplified by the OPA695 broadband amplifier is continuously received, and the electromagnetic interference intensity is calculated using the internal algorithm; at the same time, the optical power signal processed by the signal conditioning circuit of the S120C optical power detector is periodically obtained to monitor the intensity of the optical signal; all the collected data are stored in the internal buffer area of ​​the STM32 microcontroller for subsequent analysis and decision-making;

[0018] S3, signal conversion and transmission decision stage; the STM32 microcontroller continuously monitors the working status feedback information from the FTlx8571D3BCL optical transceiver chip to determine whether there is optical fiber signal access and whether the signal quality is normal; if the optical fiber signal is normally accessed, the signal is processed according to the pre-set network connection mode; when a single network cable transfer is required, the STM32 microcontroller sends a single network cable transfer control signal to the BCM54616 network processor chip, which selectively converts the processed signal through the common mode choke and H1102NL network transformer according to specific line guidance rules. Finally, the electrical signal suitable for single-cable transmission is output to the corresponding RJ45 interface. When dual-cable switching is required, the STM32 microcontroller sends a dual-cable switching control signal, and the BCM54616 network processor chip directs the processed signal to two sets of lines connected to the RJ45 interface, so that both RJ45 interfaces can output the converted network signal. During the signal conversion and transmission process, the STM32 microcontroller also dynamically adjusts the operating parameters of the BCM54616 network processor chip based on the collected environmental data and optical signal strength data to ensure stable and efficient signal transmission under different environmental conditions.

[0019] S4. Handling the no-power mode: The optical network conversion panel obtains power through the reverse power supply mechanism between the terminal and the network cable via specific pins of the RJ45 interface. The STM32 microcontroller configures each chip for low power consumption, adjusting parameters such as operating frequency and sampling frequency to ensure that basic optical signal conversion and network transmission functions can be maintained in the low-power state. At the same time, the user is informed of the current no-power mode through the OLED display or other indication methods, and the power supply status is monitored in real time.

[0020] S5, information display and interaction stage; the STM32 microcontroller integrates and processes the collected information such as temperature, humidity, electromagnetic interference intensity, optical power, and network connection status, and transmits the data to the OLED display screen through the I2C interface for display; so that users can intuitively understand the working status of the optical network conversion panel.

[0021] Beneficial Effects: The present invention provides an RJ45 control circuit and method for an optical network conversion panel. Compared with the prior art, it has the following beneficial effects:

[0022] 1. The STM32 microcontroller generates corresponding control signals based on actual network needs and transmits them to the BCM54616 network processor chip via a specific SPI pin connection. The BCM54616 network processor chip processes and directs the signals based on these signals and the precise wiring layout between itself, the H1102NL network transformer, the common-mode choke, and the RJ45 interface. When a single network cable is required, the signal is precisely directed into a single-line path. When a dual-line connection is required, the signal is rationally allocated to the dual-line channels, thereby achieving flexible switching of the network cable transfer mode.

[0023] 2. Relying on the coordination of multiple components such as the rectifier bridge, LM2596 conversion chip and STM32 microcontroller; the rectifier bridge connects the RJ45 interface POE pin and the LM2596 conversion chip, converts AC power to DC power and processes it through the chip, and configures decoupling capacitors, resistor dividers and other components on its pins to optimize power supply performance; at the same time, when there is no external power supply, the RJ45 interface reverse power supply mechanism is used, and the STM32 microcontroller configures low power consumption for each chip and monitors power; in this way, a regular and emergency power supply system is established, breaking away from the traditional reliance on a single power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 Schematic diagram of the monitoring circuit.

[0026] Figure 2 Schematic diagram of the conversion circuit.

[0027] Figure 3 This is a schematic diagram of the power supply circuit.

[0028] The reference numerals in the figure are: 1, conversion circuit; 2, power supply circuit; DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0030] The embodiment of the present application solves the problems of poor flexibility in network cable switching and single power supply mode of traditional fiber optic access panels by providing an RJ45 control circuit and method for an optical network conversion panel. When in use, the network cable switching can be flexibly switched between single and double network cables as needed, and the power supply mode has stable guarantees both in normal and no-power conditions. When the external power supply is normal, stable power supply is provided. When there is no power, reverse power supply is used and low-power configuration and monitoring are performed to ensure the continuous and effective operation of the equipment.

[0031] The technical solution in the embodiments of the present application is to solve the above technical problems, and the overall idea is as follows:

[0032] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0033] Reference Figure 1-Figure 3, an RJ45 control circuit of an optical network conversion panel, including a monitoring circuit and a conversion circuit 1, characterized in that: the monitoring circuit includes an FTLX8571D3BCL optical transceiver chip and an STM32 microcontroller, the UART_TX pin of the FTLX8571D3BCL optical transceiver chip is connected to the PA9 pin of the STM32 microcontroller, and the UART_RX pin is connected to the PA10 pin of the STM32 microcontroller, and the configuration of the optical transceiver chip parameters and the acquisition of its working status feedback information are realized through the serial port communication connection to ensure the stable access and processing of optical fiber signals; the conversion circuit 1 includes a BCM54616 network processor chip, an H1102NL network The present invention relates to a transformer, a first common-mode choke, a second common-mode choke and at least one RJ45 interface, wherein the SPI_CLK, SPI_MISO and SPI_MOSI pins of the BCM54616 network processor chip are respectively connected to the PB13, PB14 and PB15 pins of the STM32 microcontroller, for receiving configuration instructions and data interaction from the STM32 microcontroller; the FTLX8571D3BCL optical transceiver chip converts the received optical fiber signal into an electrical signal and transmits it to the BCM54616 network processor chip for data processing and protocol conversion, and the TXD0-TXD6 pins of the BCM54616 network processor chip are sequentially connected to the H1102NL network transformer. The primary winding pin 1 to the primary winding pin 7 of the transformer are connected, and the RXD0 to RXD6 pins are connected to the secondary winding pin 8 to the primary winding pin 14 of the H1102NL network transformer in sequence; when performing single network cable transfer, in response to the single network cable transfer control signal issued by the STM32 microcontroller, the BCM54616 network processor chip selectively directs the processed signal to a group of lines connected to the RJ45 interface, and the TX+ pin and TX- pin on the RJ45 interface are respectively connected to the first pin and the third pin of the first common mode choke, and the RX+ pin and RX- pin are respectively connected to the first pin and the third pin of the second common mode choke, and the second and fourth pins of the first common mode choke are respectively connected. They are respectively connected to the secondary winding pin 10 and the secondary winding pin 13 on the H1102NL network transformer, and the second and fourth pins of the second common-mode choke are respectively connected to the secondary winding pin 11 and the secondary winding pin 12 on the H1102NL network transformer, so as to convert the optical fiber signal into an electrical signal suitable for single network cable transmission and output it; when dual network cable switching is performed, in response to the dual network cable switching control signal issued by the STM32 microcontroller, the BCM54616 network processor chip respectively directs the processed signal to two groups of lines connected to the RJ45 interface, so that both RJ45 interfaces can output the converted network signal, so as to realize the conversion of the optical fiber signal into electrical signals suitable for transmission of two network cables and output them.

[0034] The FTLX8571D3BCL optical transceiver chip is connected to the STM32 microcontroller via a serial port, enabling precise parameter configuration and real-time working status monitoring of the optical transceiver chip, ensuring stable access and preliminary processing of optical fiber signals. The SPI connection between the BCM54616 network processor chip and the STM32 microcontroller enables flexible command transmission and data interaction between the STM32 microcontroller and the network processor chip, facilitating fine-grained control of the conversion process. The connection architecture of the various chips and interfaces in conversion circuit 1 is even more critical. When switching to a single network cable, the processed optical fiber electrical signal can be precisely directed to a set of RJ45 interface lines according to the STM32 microcontroller signal, and converted into an electrical signal output suitable for single network cable transmission. When switching to a dual network cable, the signal is directed to two sets of RJ45 interface lines in response to the control signal, and converted into a signal output suitable for dual network cable transmission. This flexibly meets the needs of different network connection scenarios and effectively improves the adaptability and efficiency of network switching.

[0035] Power supply circuit 2, the power supply circuit 2 is provided with a rectifier bridge and an LM2596 conversion chip, the AC2 pin of the rectifier bridge is connected to the POE pin of the RJ45 interface, the rectifier bridge is used to convert the AC power from the POE pin of the RJ45 interface into DC power, the DC output end AC1 of the rectifier bridge is connected to the Vin pin of the LM2596 conversion chip, and the Vout pin of the LM2596 conversion chip is connected to the power distribution circuit input end of the optical network conversion panel.

[0036] The connection between the rectifier bridge, the RJ45 interface POE pin and the LM2596 conversion chip enables efficient conversion of AC power from the RJ45 interface into DC power, which is then further processed into a stable power supply for various components of the optical network conversion panel, effectively ensuring the stability and reliability of the power supply of the entire equipment, enabling it to operate continuously and stably under normal external power access conditions.

[0037] The monitoring circuit is also provided with an LM35 temperature sensor, a HIH-4000 humidity sensor and an AD8318 electromagnetic interference sensor, wherein the Vout pin of the LM35 temperature sensor is connected to the PA0 pin of the STM32 microcontroller, for transmitting the collected temperature analog signal to the STM32 microcontroller; the OUT pin of the HIH-4000 humidity sensor is connected to the PA1 pin of the STM32 microcontroller, for transmitting the humidity-related analog signal detected by the humidity sensor to the STM32 microcontroller; the AD8318 electromagnetic interference sensor is connected to the PA2 pin of the STM32 microcontroller through the OPA695 broadband amplifier to detect the electromagnetic interference signal intensity around the optical network conversion panel. After the signal is amplified by the OPA695 broadband amplifier, it is transmitted to the STM32 microcontroller. The STM32 microcontroller determines the degree of electromagnetic interference based on the received signal.

[0038] The LM35 temperature sensor, connected to the STM32 microcontroller, accurately monitors the device's operating environment temperature. It promptly transmits the temperature analog signal to the STM32 microcontroller, enabling system optimization and adjustment or protection measures based on temperature changes to ensure stable device operation in a suitable temperature environment and reduce the risk of failure. The HIH-4000 humidity sensor, connected to the STM32 microcontroller, effectively detects ambient humidity and transmits humidity-related analog signals, enabling the system to monitor humidity conditions in real time, preventing electrical performance degradation or signal transmission problems caused by high humidity and ensuring the normal operation of the device in different humidity environments. The AD8318 electromagnetic interference sensor, connected to the STM32 microcontroller via the OPA695 broadband amplifier, achieves sensitive detection, amplification, and transmission of the surrounding electromagnetic interference signal strength. This allows the STM32 microcontroller to accurately determine the degree of electromagnetic interference and then take measures such as adjusting signal transmission parameters to ensure stable signal transmission in complex electromagnetic environments and enhance the device's anti-interference capability.

[0039] The monitoring circuit is also provided with an optical signal strength monitoring circuit, which is provided with an S120C optical power detector. The VCC pin of the S120C optical power detector is connected to a 5V power supply, the GND pin is grounded, and the OUT pin is connected to the PA3 pin of the STM32 microcontroller through a signal conditioning circuit.

[0040] The connection between the S120C optical power detector and the STM32 microcontroller via the signal conditioning circuit enables precise monitoring and data transmission of optical signal intensity. This enables the system to grasp the intensity dynamics of optical signals in real time, so as to promptly detect optical signal anomalies and take corrective measures. This ensures the stability and reliability of optical signal transmission during the optical network conversion process, and ensures the quality of data transmission.

[0041] An OLED display screen, wherein the VCC pin of the OLED display screen is connected to a 3.3V power supply, and the GND pin is grounded; the SCL pin is connected to the PB3 pin of the STM32 microcontroller, the MOSI pin is connected to the PB5 pin of the STM32 microcontroller, and the reset pin RST of the display screen is connected to the PB4 pin of the STM32 microcontroller for initializing the display screen control.

[0042] The multi-pin connection between the OLED display and the STM32 microcontroller enables the STM32 microcontroller to effectively control and initialize the OLED display. It can intuitively display various operating status information of the device, such as temperature, humidity, electromagnetic interference, optical power, and network connection status, on the display, greatly improving the device's visualization and user interactivity, making it convenient for users to understand the device's operating details at any time.

[0043] Capacitors are connected in parallel on the connection lines between the TXD0-TXD6 pins of the BCM54616 network processor chip and the primary winding pin 1-primary winding pin 7 of the H1102NL network transformer, and the negative electrodes of the capacitors are grounded.

[0044] The capacitors on the line connecting the TXD0-TXD6 pins of the BCM54616 network processor chip and the H1102NL network transformer achieve high-frequency filtering of the transmitted signal, effectively filtering out high-frequency clutter interference, significantly improving the purity and accuracy of signal transmission, ensuring stable and reliable data transmission on the line, and improving the quality of network data processing and transmission.

[0045] ESD protection diodes are connected in parallel on the connection lines between the RXD0-RXD6 pins of the BCM54616 network processor chip and the secondary winding pin 1-secondary winding pin 7 of the H1102NL network transformer, and the cathode of the ESD protection diode is grounded.

[0046] The ESD protection diodes on the line connecting the RXD0-RXD6 pins of the BCM54616 network processor chip and the H1102NL network transformer implement electrostatic protection for the line, effectively preventing damage to the chip and line caused by electrostatic discharge. This greatly enhances the circuit's anti-static ability, improves the reliability and stability of the equipment in environments prone to static electricity, and reduces the probability of equipment failure due to static electricity problems.

[0047] A 0.1μF capacitor C24 is added between the Vin pin of the LM2596 conversion chip and the ground near the chip. One end of the capacitor is connected to the Vin pin and the other end is grounded for high-frequency decoupling. A precision resistor divider is connected to the FB pin of the LM2596 conversion chip. The precision resistor divider includes two series resistors, and one end of the precision resistor divider is connected to the FB pin and the other end is grounded. The EN pin of the LM2596 conversion chip is connected to the PB6 pin of the STM32 microcontroller. A Schottky diode and an inductor are connected in series between the Vout pin of the LM2596 conversion chip and the output end of the power distribution circuit, and a filter network composed of multiple capacitors is connected in parallel.

[0048] The LM2596 converter chip plays a key role in the entire power management system. The 0.1μF capacitor C24 between its Vin pin and ground effectively achieves high-frequency decoupling of the input power supply, successfully filtering out high-frequency noise, making the power supply of the input chip pure and stable, ensuring stable operation of the chip, and avoiding abnormalities or performance fluctuations caused by high-frequency noise; the precision resistor divider on the FB pin can achieve accurate voltage division and feedback adjustment of the output voltage, ensuring that the chip stably outputs the required voltage according to the set resistance ratio, improving the accuracy and stability of the power supply voltage, meeting the strict power supply voltage requirements of different components of the optical network conversion panel, and ensuring the normal operation of each component; the EN pin is connected to the STM32 microcontroller The controller is connected to the STM32 microcontroller, achieving the enable control of it. The power chip can be flexibly turned on or off according to the overall working status of the equipment, realizing intelligent power management, optimizing power consumption and improving energy utilization efficiency; the Schottky diode between the Vout pin and the power distribution circuit realizes unidirectional conduction and protection of the power output to prevent reverse current from damaging the circuit, and the filter network composed of the inductor and multiple capacitors further filters and stabilizes the output power, effectively reducing power ripple, and providing stable and pure DC power for the components of the optical network conversion panel under various complex working conditions, ensuring stable and reliable operation of the equipment.

[0049] The photosensitive surface of the S120C optical power detector faces the optical output path or the optical fiber output port of the optical transceiver chip.

[0050] The specific location of the S120C optical power detector's photosensitive surface enables high-precision monitoring of optical signal intensity. Since it faces the optical output path of the optical transceiver chip or the fiber output port, it can receive optical signals to the greatest extent possible, significantly improving the accuracy and reliability of optical signal intensity detection. This provides a strong guarantee for the system's effective monitoring and processing of optical signals, ensuring the quality and stability of optical signal transmission.

[0051] An RJ45 control method for an optical network conversion panel includes the following steps:

[0052] S1, startup and self-test phase: The STM32 microcontroller first executes the startup program to initialize and configure its internal registers, clocks, etc., and then sequentially checks whether the hardware connections with the FTlx8571D3BCL optical transceiver chip, BCM54616 network processor chip, LM2596 conversion chip, and various sensors (including the LM35 temperature sensor, HIH-4000 humidity sensor, AD8318 electromagnetic interference sensor, S120C optical power detector) and OLED display are normal; if there is a connection failure, the corresponding error code or prompt message will be displayed on the OLED display;

[0053] S2, data acquisition and environmental monitoring stage; the STM32 microcontroller simultaneously starts the data acquisition threads for multiple sensors; through the connection with the LM35 temperature sensor, the temperature analog signal is read according to the set sampling frequency and converted into a digital temperature value; the humidity analog signal transmitted by the HIH-4000 humidity sensor is processed in the same way to obtain the current environmental humidity information; for the AD8318 electromagnetic interference sensor, the electromagnetic interference signal amplified by the OPA695 broadband amplifier is continuously received, and the electromagnetic interference intensity is calculated using the internal algorithm; at the same time, the optical power signal processed by the signal conditioning circuit of the S120C optical power detector is periodically obtained to monitor the intensity of the optical signal; all the collected data are stored in the internal buffer area of ​​the STM32 microcontroller for subsequent analysis and decision-making;

[0054] S3, signal conversion and transmission decision stage; the STM32 microcontroller continuously monitors the working status feedback information from the FTlx8571D3BCL optical transceiver chip to determine whether there is optical fiber signal access and whether the signal quality is normal; if the optical fiber signal is normally accessed, the signal is processed according to the pre-set network connection mode; when a single network cable transfer is required, the STM32 microcontroller sends a single network cable transfer control signal to the BCM54616 network processor chip, which selectively converts the processed signal through the common mode choke and H1102NL network transformer according to specific line guidance rules. Finally, the electrical signal suitable for single-cable transmission is output to the corresponding RJ45 interface. When dual-cable switching is required, the STM32 microcontroller sends a dual-cable switching control signal, and the BCM54616 network processor chip directs the processed signal to two sets of lines connected to the RJ45 interface, so that both RJ45 interfaces can output the converted network signal. During the signal conversion and transmission process, the STM32 microcontroller also dynamically adjusts the operating parameters of the BCM54616 network processor chip based on the collected environmental data and optical signal strength data to ensure stable and efficient signal transmission under different environmental conditions.

[0055] S4. Handling the no-power mode: The optical network conversion panel obtains power through the reverse power supply mechanism between the terminal and the network cable via specific pins of the RJ45 interface. The STM32 microcontroller configures each chip for low power consumption, adjusting parameters such as operating frequency and sampling frequency to ensure that basic optical signal conversion and network transmission functions can be maintained in the low-power state. At the same time, the user is informed of the current no-power mode through the OLED display or other indication methods, and the power supply status is monitored in real time.

[0056] S5, information display and interaction stage; the STM32 microcontroller integrates and processes the collected information such as temperature, humidity, electromagnetic interference intensity, optical power, and network connection status, and transmits the data to the OLED display screen through the I2C interface for display; so that users can intuitively understand the working status of the optical network conversion panel.

[0057] During use, after the system is powered on, the STM32 microcontroller first executes the startup program to initialize and configure its internal registers, clocks, etc., and then sequentially detects the hardware connection status with the FTLX8571D3BCL optical transceiver chip, BCM54616 network processor chip, LM2596 conversion chip, LM35 temperature sensor, HIH-4000 humidity sensor, AD8318 electromagnetic interference sensor, S120C optical power detector and OLED display. If the connection is normal, it sends initialization instructions to each chip and sensor to put them into the ready state. If there is a connection failure, the corresponding error code or prompt message is displayed on the OLED display. The STM32 microcontroller then simultaneously launches multiple data acquisition threads, reading the analog temperature signal from the LM35 temperature sensor at a set sampling frequency and converting it into a digital temperature value. It then performs the same processing on the analog humidity signal from the HIH-4000 humidity sensor to obtain humidity information. It also continuously receives the AD8318 electromagnetic interference sensor signal, amplified by the OPA695 broadband amplifier, and calculates the electromagnetic interference intensity using an internal algorithm. It also periodically acquires the optical power signal from the S120C optical power detector, processed by the signal conditioning circuit, and stores all of this collected data in an internal buffer. Simultaneously, the STM32 microcontroller continuously monitors the operating status feedback from the FTLX8571D3BCL optical transceiver chip to determine whether a fiber optic signal is connected and whether the signal quality is normal.When the optical fiber signal is normally connected, if single network cable transfer is required, the STM32 microcontroller sends a single network cable transfer control signal to the BCM54616 network processor chip. The BCM54616 network processor chip converts the processed signal according to specific line guidance rules through the common mode choke and H1102NL network transformer, and finally outputs the electrical signal suitable for single network cable transmission to the corresponding RJ45 interface. If dual network cable transfer is required, the STM32 microcontroller sends a dual network cable transfer control signal. The BCM54616 network processor chip guides the processed signal to two groups of lines connected to the RJ45 interface, so that both RJ45 interfaces can output the converted network signal. In the process of signal conversion and transmission, the STM32 microcontroller will dynamically adjust the BCM5 based on the collected environmental data and optical signal strength data. The operating parameters of the 4616 network processor chip, such as transmission rate and signal gain, are used to ensure stable and efficient signal transmission under different environmental conditions. The optical network conversion panel obtains power through the reverse power supply mechanism between the terminal and the network cable using specific pins of the RJ45 interface. The STM32 microcontroller configures each chip for low power consumption and adjusts parameters such as operating frequency and sampling frequency to ensure that basic optical signal conversion and network transmission functions can be maintained in a low-power state. Finally, the STM32 microcontroller integrates and processes the collected information such as temperature, humidity, electromagnetic interference intensity, optical power, and network connection status, and transmits the data to the OLED display screen through the SPI interface for display. The display content includes real-time environmental parameter values, optical signal strength curves, network connection mode and status indicators, so that users can intuitively understand the working status of the optical network conversion panel.

[0058] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0059] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An RJ45 control circuit of an optical network conversion panel, comprising a monitoring circuit and a conversion circuit (1), characterized in that: The monitoring circuit includes an FTLX8571D3BCL optical transceiver chip and an STM32 microcontroller, wherein the UART_TX pin of the FTLX8571D3BCL optical transceiver chip is connected to the PA9 pin of the STM32 microcontroller, and the UART_RX pin is connected to the PA10 pin of the STM32 microcontroller. The monitoring circuit configures the optical transceiver chip parameters and obtains its working status feedback information through a serial communication connection to ensure stable access and processing of optical fiber signals; The conversion circuit (1) includes a BCM54616 network processor chip, an H1102NL network transformer, a first common-mode choke, a second common-mode choke, and at least one RJ45 interface, wherein the SPI_CLK, SPI_MISO, and SPI_MOSI pins of the BCM54616 network processor chip are respectively connected to the PB13, PB14, and PB15 pins of the STM32 microcontroller, for receiving configuration instructions and data interaction from the STM32 microcontroller; the FTLX8571D3BCL optical transceiver chip converts the received optical fiber signal into an electrical signal and transmits the electrical signal to the BCM54616 network processor chip for data processing and protocol conversion; the TXD0-TXD6 pins of the BCM54616 network processor chip are sequentially connected to the primary winding pin 1 to the primary winding pin 7 of the H1102NL network transformer, and the RXD0-RXD6 pins are sequentially connected to the secondary winding pin 8 to the primary winding pin 14 of the H1102NL network transformer; When performing single network cable transfer, in response to the single network cable transfer control signal issued by the STM32 microcontroller, the BCM54616 network processor chip selectively directs the processed signal to a group of lines connected to the RJ45 interface, and the TX+ pin and TX- pin on the RJ45 interface are respectively connected to the first pin and the third pin of the first common mode choke coil, and the RX+ pin and the RX- pin are respectively connected to the first pin and the third pin of the second common mode choke coil, and the second and fourth pins of the first common mode choke coil are respectively connected to the secondary winding pin 10 and the secondary winding pin 13 on the H1102NL network transformer, and the second and fourth pins of the second common mode choke coil are respectively connected to the secondary winding pin 11 and the secondary winding pin 12 on the H1102NL network transformer, so as to convert the optical fiber signal into an electrical signal suitable for single network cable transmission and output it; When dual network cable switching is performed, in response to the dual network cable switching control signal issued by the STM32 microcontroller, the BCM54616 network processor chip directs the processed signals to two groups of lines connected to the RJ45 interface, so that both RJ45 interfaces can output the converted network signals, thereby converting the optical fiber signals into electrical signals suitable for transmission through two network cables and outputting them.

2. The RJ45 control circuit of an optical network conversion panel according to claim 1, characterized in that: Also includes: A power supply circuit (2) is provided with a rectifier bridge and an LM2596 conversion chip, wherein the AC2 pin of the rectifier bridge is connected to the POE pin of the RJ45 interface, the rectifier bridge is used to convert the alternating current from the POE pin of the RJ45 interface into direct current, the DC output terminal AC1 of the rectifier bridge is connected to the Vin pin of the LM2596 conversion chip, and the Vout pin of the LM2596 conversion chip is connected to the power distribution circuit input terminal of the optical network conversion panel.

3. The RJ45 control circuit of an optical network conversion panel according to claim 1, characterized in that: The monitoring circuit is also provided with an LM35 temperature sensor, a HIH-4000 humidity sensor and an AD8318 electromagnetic interference sensor, wherein the Vout pin of the LM35 temperature sensor is connected to the PA0 pin of the STM32 microcontroller, for transmitting the collected temperature analog signal to the STM32 microcontroller; the OUT pin of the HIH-4000 humidity sensor is connected to the PA1 pin of the STM32 microcontroller, for transmitting the humidity-related analog signal detected by the humidity sensor to the STM32 microcontroller; the AD8318 electromagnetic interference sensor is connected to the PA2 pin of the STM32 microcontroller through the OPA695 broadband amplifier to detect the electromagnetic interference signal intensity around the optical network conversion panel. After the signal is amplified by the OPA695 broadband amplifier, it is transmitted to the STM32 microcontroller. The STM32 microcontroller determines the degree of electromagnetic interference based on the received signal.

4. The RJ45 control circuit of an optical network conversion panel according to claim 1, characterized in that: The monitoring circuit is also provided with an optical signal strength monitoring circuit, which is provided with an S120C optical power detector. The VCC pin of the S120C optical power detector is connected to a 5V power supply, the GND pin is grounded, and the OUT pin is connected to the PA3 pin of the STM32 microcontroller through a signal conditioning circuit.

5. The RJ45 control circuit of an optical network conversion panel according to claim 1, characterized in that: Also includes: An OLED display screen, wherein the VCC pin of the OLED display screen is connected to a 3.3V power supply, and the GND pin is grounded; the SCL pin is connected to the PB3 pin of the STM32 microcontroller, the MOSI pin is connected to the PB5 pin of the STM32 microcontroller, and the reset pin RST of the display screen is connected to the PB4 pin of the STM32 microcontroller for initializing the display screen control.

6. The RJ45 control circuit of an optical network conversion panel according to claim 1, characterized in that: Capacitors are connected in parallel on the connection lines between the TXD0-TXD6 pins of the BCM54616 network processor chip and the primary winding pin 1-primary winding pin 7 of the H1102NL network transformer, and the negative electrodes of the capacitors are grounded.

7. The RJ45 control circuit of an optical network conversion panel according to claim 1, characterized in that: ESD protection diodes are connected in parallel on the connection lines between the RXD0-RXD6 pins of the BCM54616 network processor chip and the secondary winding pin 1-secondary winding pin 7 of the H1102NL network transformer, and the cathode of the ESD protection diode is grounded.

8. The RJ45 control circuit of an optical network conversion panel according to claim 2, characterized in that: A 0.1μF capacitor C24 is added between the Vin pin of the LM2596 conversion chip and the ground near the chip. One end of the capacitor is connected to the Vin pin and the other end is grounded for high-frequency decoupling. A precision resistor divider is connected to the FB pin of the LM2596 conversion chip. The precision resistor divider includes two series resistors, and one end of the precision resistor divider is connected to the FB pin and the other end is grounded. The EN pin of the LM2596 conversion chip is connected to the PB6 pin of the STM32 microcontroller. A Schottky diode and an inductor are connected in series between the Vout pin of the LM2596 conversion chip and the output end of the power distribution circuit, and a filter network composed of multiple capacitors is connected in parallel.

9. The RJ45 control circuit of an optical network conversion panel according to claim 4, characterized in that: The photosensitive surface of the S120C optical power detector faces the optical output path or the optical fiber output port of the optical transceiver chip.

10. A RJ45 control method for an optical network conversion panel, comprising the following steps: S1, startup and self-test phase: The STM32 microcontroller first executes the startup program to initialize and configure its internal registers, clocks, etc., and then sequentially checks whether the hardware connections with the FTlx8571D3BCL optical transceiver chip, BCM54616 network processor chip, LM2596 conversion chip, LM35 temperature sensor, HIH-4000 humidity sensor, AD8318 electromagnetic interference sensor, S120C optical power detector and OLED display are normal; if there is a connection failure, the corresponding error code or prompt message will be displayed on the OLED display; S2, data acquisition and environmental monitoring stage; the STM32 microcontroller simultaneously starts the data acquisition threads for multiple sensors; through the connection with the LM35 temperature sensor, the temperature analog signal is read according to the set sampling frequency and converted into a digital temperature value; the humidity analog signal transmitted by the HIH-4000 humidity sensor is processed in the same way to obtain the current environmental humidity information; for the AD8318 electromagnetic interference sensor, the electromagnetic interference signal amplified by the OPA695 broadband amplifier is continuously received, and the electromagnetic interference intensity is calculated using the internal algorithm; at the same time, the optical power signal processed by the signal conditioning circuit of the S120C optical power detector is periodically obtained to monitor the intensity of the optical signal; all the collected data are stored in the internal buffer area of ​​the STM32 microcontroller for subsequent analysis and decision-making; S3, signal conversion and transmission decision stage; the STM32 microcontroller continuously monitors the working status feedback information from the FTlx8571D3BCL optical transceiver chip to determine whether there is optical fiber signal access and whether the signal quality is normal; If the optical fiber signal is normally connected, the signal is processed according to the pre-set network connection mode; when a single network cable transfer is required, the STM32 microcontroller sends a single network cable transfer control signal to the BCM54616 network processor chip, which selectively converts the processed signal through the common mode choke and H1102NL network transformer according to specific line guidance rules, and finally outputs the electrical signal suitable for single network cable transmission to the corresponding RJ45 interface; when a dual network cable transfer is required, the STM32 microcontroller sends a dual network cable transfer control signal, and the BCM54616 network processor chip guides the processed signal to two groups of lines connected to the RJ45 interface respectively, so that both RJ45 interfaces can output the converted network signal; during the signal conversion and transmission process, the STM32 microcontroller will also dynamically adjust the working parameters of the BCM54616 network processor chip according to the collected environmental data and optical signal strength data to ensure that the signal can be transmitted stably and efficiently under different environmental conditions; S4. Handling the no-power mode: The optical network conversion panel obtains power through the reverse power supply mechanism between the terminal and the network cable via specific pins of the RJ45 interface. The STM32 microcontroller configures each chip for low power consumption, adjusting parameters such as operating frequency and sampling frequency to ensure that basic optical signal conversion and network transmission functions can be maintained in the low-power state. At the same time, the user is informed of the current no-power mode through the OLED display or other indication methods, and the power supply status is monitored in real time. S5, information display and interaction stage; the STM32 microcontroller integrates and processes the collected information such as temperature, humidity, electromagnetic interference intensity, optical power, and network connection status, and transmits the data to the OLED display screen through the I2C interface for display; so that users can intuitively understand the working status of the optical network conversion panel.

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