An indoor and outdoor comprehensive monitoring transmission platform based on optical fiber communication for railway traffic

Abstract

The utility model discloses a kind of indoor and outdoor comprehensive monitoring transmission platform based on optical fiber communication for railway traffic, belong to information transmission device technical field, the platform includes connected data processing terminal and host computer, further include: handheld terminal, fixed communication extension and wireless / wired communication device, handheld terminal can be converted into wireless signal with the information entered;Fixed communication extension includes antenna, radio frequency circuit, conversion interface, first processor and ethernet interface connected bidirectionally in turn;The input end of wireless / wired communication device is connected with radio frequency circuit, and the output end of wireless / wired communication device is connected with data processing terminal;Therefore, for the railway section without optical fiber channel, the utility model communication extension is used as relay node, information is transmitted to the position with optical cable transmission condition in the mode of wireless transmission, then information is converted into optical signal for transmission, realizes that railway monitoring information is real-time returned to host computer.

Description

Technical Field

[0001] This utility model belongs to the field of information transmission device technology, specifically relating to an indoor and outdoor integrated monitoring and transmission platform for railway transportation based on optical fiber communication. Background Technology

[0002] Current railway traffic monitoring and transmission systems generally employ a communication method that heavily relies on a single physical medium. A typical implementation involves pre-burying optical fibers or cables between the station control center and monitoring equipment along the railway line as a backbone link. To achieve this connection, fixed node equipment (such as industrial Ethernet switches with photoelectric converters inserted into the SFP / SFP+ slots of these switches) is deployed along the track. The pre-buried optical fibers are then connected to the photoelectric converters via fusion splicing or cold splicing. When trackside equipment (such as turnout status sensors installed along the railway line) collects real-time turnout status signals, the sensors convert these signals into raw digital signals using an internal analog-to-digital converter. These raw digital signals are then packaged according to the TCP / IP protocol to form an Ethernet data frame. Finally, the sensor sends this data frame as an electrical signal to the industrial Ethernet switch. The industrial Ethernet switch then passes this data frame (still an electrical signal) to the photoelectric converter, which converts the electrical signal into an optical signal and transmits it to the host computer via optical fiber.

[0003] However, the aforementioned communication methods have a fundamental flaw: they cannot dynamically adjust the transmission method according to the infrastructure conditions of different sections along the railway. Especially in remote areas such as tunnels, mountainous regions, and bridges where fiber optic cable laying is costly or construction is limited, the system still relies heavily on wired connections due to the lack of flexible relay switching mechanisms. This forces some critical monitoring points (such as turnout status sensors) to be isolated because physical links are unavailable. This not only creates communication coverage blind spots but also generates numerous data silos, severely restricting the integrity of the railway monitoring network and the real-time and reliable transmission of data, posing a potential threat to train operation safety. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a simple, reasonably designed, and highly practical indoor and outdoor integrated monitoring and transmission platform for railway transportation based on fiber optic communication, which addresses the shortcomings of the prior art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: an indoor and outdoor integrated monitoring and transmission platform for railway transportation based on optical fiber communication, comprising interconnected data processing terminals and a host computer, characterized in that it further includes: A handheld terminal, which is equipped with a touch screen for inputting information, and can convert the input information into wireless signals. The fixed communication unit is set up next to the track. The fixed communication unit includes a first antenna, a radio frequency circuit, a conversion interface and a first processor connected in sequence in both directions. The first antenna receives the wireless signal transmitted by the handheld terminal. The radio frequency circuit modulates the wireless signal to simulate a baseband signal. The conversion interface converts the simulated baseband signal into a digital signal and transmits it to the first processor for processing. The processed digital signal is converted back into an analog baseband signal through the conversion interface and then output through the radio frequency circuit. The wireless / wired communication device has its signal input end connected to a first antenna and its signal output end connected to a data processing terminal. The wireless / wired communication device converts wireless signals into wired signals and transmits them to the data processing terminal.

[0006] Preferably, the radio frequency circuit includes a receiving transformer, a first transimpedance amplifier, a first operational amplifier, and a first demodulator connected in sequence to the first antenna. The output of the first demodulator is connected to the input of the conversion interface. The wireless signal received by the first antenna is coupled by the receiving transformer to obtain a current signal. The first transimpedance amplifier converts the current signal into a voltage signal, which is then amplified by the first operational amplifier. The radio frequency circuit also includes a first frequency generating circuit and a first frequency divider that cooperate to provide a local oscillator signal. The output of the first frequency generating circuit is connected to the first frequency divider, and the output of the first frequency divider is connected to the first demodulator. The amplified high-frequency signal and the local oscillator signal are input to the first demodulator to demodulate an analog baseband signal, which is then input to the conversion interface. The RF circuit also includes a modulation / demodulation chip, a phase detector, an oscillator, and a power amplifier, which are connected in sequence to the conversion interface. The output of the first frequency generation circuit is connected to the phase detector, and the output of the first frequency divider is connected to the modulation / demodulation chip. The modulation / demodulation chip modulates the analog baseband signal into a wireless signal. The phase detector compares the phase difference between the modulated wireless signal and the local oscillator signal and outputs the error to the oscillator. The oscillator modulates the frequency of the wireless signal to a specified frequency. The power amplifier transmits the wireless signal output by the oscillator. The output of the power amplifier is connected to the first antenna to realize signal transmission. The output of the power amplifier is also connected to the power controller, which controls the power of the wireless signal.

[0007] Preferably, the handheld terminal further includes a second processor, a first network PHY, a wireless module, and a second antenna, which are sequentially and bidirectionally connected to the touchscreen. The second processor is used to process the input signal, the first network PHY encodes and modulates the processed digital signal to generate an analog signal, and the wireless module is used to convert the analog signal into a wireless signal and finally output it through the second antenna.

[0008] Preferably, the fixed communication extension also includes an Ethernet interface and a second power interface, which are respectively connected to the first processor. The Ethernet interface is used to configure the IP address and gateway of the fixed communication extension, and the second power interface is used to supply power to the fixed communication extension.

[0009] Preferably, the wireless / wired communication device includes a signal transmission module, which includes a housing. An electronic circuit board is disposed within the housing. The electronic circuit board integrates a power module, a wireless / wired bidirectional communication interface, and a microcontroller. It also includes a wireless / wired communication module bidirectionally connected to the wireless / wired bidirectional communication interface. The wireless / wired communication module is connected to a first antenna. The wireless / wired communication module receives wireless signals from the first antenna, converts the wireless signals into digital signals, and transmits them to the microcontroller for processing via the wireless / wired bidirectional communication interface. The signal processed by the microcontroller is then transmitted via a wired connection to a data processing terminal.

[0010] Preferably, the wireless / wired communication module includes a third antenna, a signal recovery circuit, and a communication module connected bidirectionally in sequence. The third antenna receives wireless signals, the signal recovery circuit receives wireless signals and demodulates them into analog baseband signals, the communication circuit performs A / D conversion on the analog baseband signals, the communication module is connected to a first microprocessor and a second microprocessor respectively, and the first and second microprocessors are electrically connected to each other. The first and second microprocessors analyze and compare the signals after A / D conversion. The first microprocessor is bidirectionally connected to a second network PHY, which converts the signals transmitted by the first microprocessor into Ethernet signals. The second microprocessor is bidirectionally connected to a TTL fiber optic converter, which converts the signals transmitted by the second microprocessor into fiber optic signals. The outputs of the second network PHY and the TTL fiber optic converter are both connected to the wireless / wired bidirectional communication interface.

[0011] Preferably, the signal recovery circuit includes a second transimpedance amplifier, a second operational amplifier, and a second demodulator connected in sequence to the antenna. The output of the second demodulator is connected to the communication module. The signal recovery circuit also includes a second frequency generating circuit and a second frequency divider that cooperate to provide a local oscillator signal. The output of the second frequency generating circuit is connected to the second frequency divider, and the output of the second frequency divider is connected to the second demodulator. The second transimpedance amplifier converts the current signal into a voltage signal, and the second operational amplifier amplifies the voltage signal. The amplified high-frequency signal and the local oscillator signal are input to the second demodulator to demodulate an analog baseband signal, which is then input to the communication module.

[0012] Preferably, a programmable logic device is disposed between the first microprocessor and the second microprocessor and is bidirectionally connected thereto.

[0013] Preferably, the wireless / wired communication module further includes a power supply circuit connected to the signal recovery circuit, the communication module, the first microprocessor, and the second microprocessor, respectively. The power supply circuit is used to supply power to the signal recovery circuit, the communication module, the first microprocessor, the second microprocessor, the second network PHY, and the TTL fiber optic converter.

[0014] This utility model has the following advantages compared with the prior art: 1. This utility model discloses an indoor and outdoor integrated monitoring and transmission platform for railway transportation based on fiber optic communication. Users input information (such as equipment operating parameters) via a touchscreen. A handheld terminal encodes the information into digital signals, which are then modulated into wireless signals by a built-in radio frequency module for external transmission. A fixed communication unit acts as a relay device, receiving the wireless signals via an antenna. The radio frequency circuit modulates the wireless signals and outputs analog baseband signals. A conversion interface digitizes the analog baseband signals (ADC conversion) and transmits them to a first processor for processing. The processed digital signal is then converted back into an analog baseband signal via the conversion interface and transmitted to a wireless / wired communication device via the radio frequency circuit. The fixed communication unit is wirelessly connected to the wireless / wired communication device. The wireless / wired communication device converts the wireless signal into a wired signal and transmits it to the data processing terminal located at the station via optical fiber or cable. Finally, the signal is transmitted to the host computer through the data processing terminal to complete information monitoring. In summary, the indoor and outdoor integrated monitoring and transmission platform disclosed in this utility model can use the communication unit as a relay node to transmit information wirelessly to a location with optical fiber or cable transmission conditions for railway sections without optical fiber channels. The information is then converted into wired signals for transmission, realizing the real-time transmission of railway monitoring information back to the host computer for monitoring. 2. This utility model discloses an indoor and outdoor integrated monitoring and transmission platform for railway transportation based on optical fiber communication. During the communication process, the TTL optical fiber converter in the wireless / wired communication module can convert the level data into optical signals and transmit them. The optical fiber transmission ensures that the signal transmission process is completely free from electromagnetic interference. When the wireless / wired communication module uses wireless radio frequency communication, the strong anti-interference capability of wireless technology can also avoid electromagnetic interference. Therefore, it can effectively avoid problems such as data transmission errors, signal instability, or errors, and effectively ensure the safety and reliability of railway signal transmission. 3. This utility model discloses an indoor and outdoor integrated monitoring and transmission platform for railway transportation based on optical fiber communication. The data processing part of this device adopts a redundant structure based on redundant bus and dual microcontrollers. When a wireless signal is received, the content of the signal will be parsed through two independent microprocessors and two independent data buses according to the prescribed communication protocol, and the parsing results will be compared to ensure the accuracy of the information. 4. This utility model discloses an indoor and outdoor integrated monitoring and transmission platform for railway transportation based on optical fiber communication. A programmable logic device (CPLD) is provided between the first microprocessor and the second microprocessor, and is bidirectionally connected to them respectively. The CPLD is used to simulate the external storage area between the microprocessors. The microprocessors and the CPLD are connected and access each other through an external data address bus. The two microprocessors can write data into the CPLD at any time and retrieve data from the CPLD at any time, realizing parallel data transmission and thus greatly improving the data interaction rate between the two microprocessors.

[0015] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] Figure 1 This is a block diagram of the system structure of this utility model; Figure 2 This is a block diagram of the fixed communication extension unit of this utility model; Figure 3 This is a block diagram of the radio frequency circuit of this utility model; Figure 4 This is a structural block diagram of the handheld terminal of this utility model; Figure 5 This is a structural block diagram of the signal transmission module of this utility model; Figure 6 This is a structural block diagram of the wireless / wired communication device of this utility model; Figure 7 This is a block diagram of the signal recovery circuit of this utility model; Figure 8 This is a schematic diagram of the dual-processor interaction mode of the wireless / wired communication unit of the utility model. Figure 9 This is the power interface circuit diagram of this utility model; Figure 10 This is a block diagram of the power conversion circuit of this utility model.

[0017] Explanation of reference numerals in the attached figures: 1-2. First power interface; 1-3. Power conversion circuit; 1-31. DC48V input interface; 1-32. Fuse; 1-33. Diode; 1-34. DC / DC48V to 12V power module; 1-35. DC / DC12V to 5V power module; 1-36. DC / DC5V to 3.3V power module; 1-37. Second DC / DC12V to 5V power module; 1-38. Microcontroller power supply interface; 1-39. Wireless / wired bidirectional communication module power supply interface; 2. Wireless / wired bidirectional communication interface; 3. Microcontroller; 4-1. Third antenna; 4-2. Signal recovery circuit; 4-3. Communication module; 4-4. First microprocessor; 4-5. Second microprocessor; 4-6. Second network PHY; 4-7. TTL fiber optic converter; 4-8. Power circuit; 4-21. Second transimpedance amplifier; 4-22. Second operational amplifier. 4-23. Second demodulator; 4-24. Second frequency generating circuit; 4-25. Second frequency divider; 5. Power supply unit; 6. Data processing terminal; 7. Host computer; 8. Handheld terminal; 8-1. Touch screen; 8-2. Second processor; 8-3. First network PHY; 8-4. Wireless module; 8-5. Second antenna; 9. Fixed communication extension; 9-1. First antenna; 9-2. Radio frequency circuit; 9-3. Conversion interface; 9-4. First processor; 9-5. Ethernet interface; 9-6. Second power interface; 9-01. Power controller; 9-11. First frequency generating circuit; 9-12. Receiving transformer; 9-13. First transimpedance amplifier; 9-14. First operational amplifier; 9-15. First demodulator; 9-16. First frequency divider; 9-17. Modulation and demodulation chip; 9-18. Phase detector; 9-19. Oscillator; 9-10. Power amplifier. Detailed Implementation

[0018] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, this utility model discloses an indoor and outdoor integrated monitoring and transmission platform for railway transportation based on fiber optic communication. It includes a bidirectionally connected data processing terminal 6 and a host computer 7, and further includes a handheld terminal 8, a fixed communication unit 9 installed beside the track, and a wireless / wired communication device. The handheld terminal 8 is equipped with a touchscreen 8-1 for inputting information and can convert the input information into wireless signals. The fixed communication unit 9 includes a first antenna 9-1, a radio frequency circuit 9-2, a conversion interface 9-3, a first processor 9-4, and an Ethernet interface 9-5, all connected bidirectionally. The Ethernet interface 9-5 is used to configure the IP address and gateway of the fixed communication unit 9. The first antenna 9-1 receives the wireless signals transmitted by the handheld terminal 8. The radio frequency circuit 9-2 modulates the wireless signals and outputs an analog baseband signal. The conversion interface... After the analog baseband signal is converted into a digital signal by 9-3, it is transmitted to the first processor 9-4 for processing. The processed digital signal is then converted back into an analog baseband signal by the conversion interface 9-3 and output through the radio frequency circuit 9-2. The signal input terminal of the wireless / wired communication device is connected to the first antenna 9-1, and the signal output terminal of the wireless / wired communication device is connected to the data processing terminal 6. The wireless / wired communication device converts the wireless signal into a wired signal and transmits it to the data processing terminal 6 located at the station via a wired connection. In actual engineering, the wireless / wired communication device and the information processing terminal 6 are connected according to the user configuration. Therefore, the wireless / wired communication device and the data processing terminal are connected via optical fiber or Ethernet for data transmission. Finally, the data is transmitted to the host computer 7 through the data processing terminal 6 to complete information monitoring.

[0019] In summary, the indoor and outdoor integrated monitoring and transmission platform disclosed in this utility model can, for railway sections without fiber optic or cable channels, use the communication extension 9 as a relay node to transmit information wirelessly to a location with fiber optic transmission capabilities, and then convert the information into wired signals for transmission, thus enabling real-time transmission of railway monitoring information back to the host computer for monitoring.

[0020] like Figure 5 As shown, the handheld terminal 8 disclosed in this embodiment also includes a second processor 8-2, a first network PHY 8-3, a wireless module 8-4, and an antenna 8-5 that are bidirectionally connected to the touch screen 8-1 in sequence. The second processor 8-2 is used to process the input signal. The first network PHY 8-3 encodes and modulates the processed digital signal to generate an analog signal. The wireless module 8-4 is used to convert the generated analog signal into a wireless signal and finally output it through the wireless module 8-4.

[0021] like Figure 2As shown, when the fixed communication extension 9 receives a radio frequency (RF) signal, the RF signal is modulated into an analog baseband signal by the first antenna 9-1 and the RF circuit 9-2 connected to the first antenna 9-1. This signal is then converted into a voltage signal by the conversion interface 9-3 connected to the RF circuit 9-2, and further converted into a corresponding digital signal before being transmitted to the first processor 9-4. The first processor 9-4 filters out digital noise during transmission and performs supplementary processing for any lost signals. The processed digital signal is then converted back into an analog baseband signal by the conversion interface 9-3 and output through the RF circuit 9-2. The signal is then modulated and amplified by the RF circuit 9-2 and transmitted wirelessly to a wireless / wired communication device.

[0022] like Figure 3As shown, the RF circuit can be implemented based on the MAX2363 and its supporting peripheral circuits, or it can be directly implemented using Ebit's E611 series wireless communication module. Specifically, the RF circuit 9-2 includes a receiving transformer 9-12, a first transimpedance amplifier 9-13, a first operational amplifier 9-14, and a first demodulator 9-15, which are connected in sequence to the first antenna 9-1. The output of the first demodulator 9-15 is connected to the input of the conversion interface 9-3. The wireless signal received by the first antenna 9-1 enters the receiving transformer 9-12 through the ANT pin. The receiving transformer 9-1... After coupling, a current signal is obtained. The first transimpedance amplifier 9-13 converts the current signal into a voltage signal, which is then amplified by the first operational amplifier 9-14. The radio frequency circuit 9-2 also includes a first frequency generating circuit 9-11 and a first frequency divider 9-16 that cooperate to provide the local oscillator signal. The output of the first frequency generating circuit 9-11 is connected to the first frequency divider 9-16, and the output of the first frequency divider 9-16 is connected to the first demodulator 9-15. The amplified high-frequency signal and the local oscillator signal are input to the first demodulator 9-15, where they are demodulated to produce an analog baseband signal, which is then input to the conversion interface 9-15. 3. The demodulated signal is output differentially to the conversion interface 9-3 via the RX and RX- pins. The RF circuit 9-2 also includes a modem chip 9-17, a phase detector 9-18, an oscillator 9-19, and a power amplifier 9-10, which are connected in sequence to the conversion interface 9-3. The output of the first frequency generation circuit 9-11 is connected to the phase detector 9-18. The modem chip 9-17 is connected to the output of the conversion interface 9-3 via the TX and TX- pins. The output of the first frequency divider 9-16 is connected to the modem chip 9-17. The modulation chip 9-17 modulates the analog baseband signal into a wireless signal. The phase detector 9-18 compares the phase difference between the modulated wireless signal and the local oscillator signal and outputs the error to the oscillator 9-19. The oscillator 9-19 modulates the frequency of the wireless signal to a specified frequency. The power amplifier 9-10 transmits the wireless signal output from the oscillator 9-19. The output of the power amplifier 9-10 is connected to the first antenna 9-1 to achieve signal transmission. The output of the power amplifier 9-10 is also connected to the power controller 9-01, which controls the power of the wireless signal. In summary, the RF circuit 9-2 is a complete bidirectional communication unit integrating signal transmission and reception functions. Its core function is, in the receiving direction, to accurately recover the original analog baseband signal from the weak high-frequency wireless signal captured by antenna 9-1 through a series of amplification, frequency conversion and demodulation processes, and deliver it to conversion interface 9-3 for further processing; in the transmitting direction, it can efficiently convert the analog baseband signal sent from conversion interface 9-3 into a radio frequency signal that conforms to the specified frequency and power through modulation, frequency synthesis and power amplification, and transmit it through antenna 9-1. Specifically, such as Figure 5As shown, the wireless / wired communication device disclosed in this embodiment includes a signal transmission module. The signal transmission module includes a housing, and an electronic circuit board is disposed inside the housing. The electronic circuit board integrates a power module, a wireless / wired bidirectional communication interface 2, and a microcontroller 3. It also includes a wireless / wired communication module bidirectionally connected to the wireless / wired bidirectional communication interface 2. The wireless / wired communication module is connected to the radio frequency circuit 9-2. The wireless / wired communication module receives wireless signals transmitted from the fixed communication extension 9. The wireless / wired communication module converts the wireless signals into optical fiber signals and transmits them to the microcontroller 3 for processing through the wireless / wired bidirectional communication interface 2. The signal processed by the microcontroller 3 is transmitted sequentially to the data processing terminal 6 and the host computer 7 through optical fiber. The data processing terminal sends the information to the host computer 7 through the CAN interface.

[0023] Specifically, such as Figure 6 As shown, the wireless / wired communication module disclosed in this embodiment includes a third antenna 4-1, a signal recovery circuit 4-2, and a communication module 4-3 connected bidirectionally in sequence. The third antenna 4-1 is used to receive wireless signals, the signal recovery circuit 4-2 is used to recover the wireless signals into voltage signals, and the communication module 4-3 is used to convert the voltage signals into digital signals. The output terminals of the communication module 4-3 are respectively connected to a first microprocessor 4-4 and a second microprocessor 4-5. The first microprocessor 4-4 and the second microprocessor 4-5 are electrically connected. The output terminal of the first microprocessor 4-4 is bidirectionally connected to a second network PHY 4-6, and the output terminal of the second microprocessor 4-5 is bidirectionally connected to a TTL fiber optic converter 4-7. The first microprocessor 4-4 and the second microprocessor 4-5 are connected bidirectionally. Processor 4-5 is used to analyze, compare, and transmit digital signals. The second network PHY 4-6 converts digital signals into voltage signals, and the TTL fiber optic converter 4-7 converts voltage levels into fiber optic signals. During actual communication, the third antenna 4-1 receives wireless signals from the air and obtains a current signal through electromagnetic induction. The signal recovery circuit 4-2 converts the induced current signal into a voltage signal. The communication module 4-3 performs an A / D conversion on the voltage signal and simultaneously sends the converted digital value to the first microprocessor 4-4 and the second microprocessor 4-5. The first microprocessor 4-4 and the second microprocessor 4-5 receive the information from the communication module 4-3 and parse it themselves, then compare the parsed results. If the results from the comparison between the two microprocessors are consistent, the data is considered valid. Microprocessors 2-4 and 2-5 upload the results to the wireless / wired bidirectional communication interface 2 via the Ethernet interface and the second network PHY 4-6, TTL interface, and TTL fiber optic converter 2-7, respectively. If the results from the comparison between the two microprocessors are inconsistent, the data is discarded.

[0024] like Figure 7As shown, the signal recovery circuit 4-2 includes a second transimpedance amplifier 4-21, a second operational amplifier 4-22, and a second demodulator 4-23, which are connected in sequence to the antenna 4-1. The output of the second demodulator 4-23 is connected to the communication module 4-3. The signal recovery circuit 4-2 also includes a second frequency generating circuit 4-24 and a second frequency divider 4-25, which cooperate to provide the local oscillator signal. The output of the second frequency generating circuit 4-24 is connected to the second frequency divider 4-25, and the output of the second frequency divider 4-25 is connected to the second demodulator 4-23. The second transimpedance amplifier 4-21 converts the current signal into a voltage signal, and the second operational amplifier 4-22 amplifies the voltage signal. The amplified high-frequency signal and the local oscillator signal are input to the second demodulator 4-23 to demodulate the analog baseband signal, which is then input to the communication module 4-3. Therefore, the function of the signal recovery circuit 4-2 is to amplify and demodulate the weak high-frequency wireless signal received by the antenna, and finally recover the analog baseband signal that can be processed by subsequent circuits. Specifically, after receiving the wireless signal and obtaining a weak signal, the antenna 4-1 enters the second operational amplifier 4-22 through the ANT pin. After amplification, it is demodulated with the local oscillation signal through the second demodulator 4-23 to produce an analog baseband signal. The analog baseband signal is then sent to the AUX pin of the communication module. In the communication module, it undergoes analog-to-digital conversion and is finally converted into a digital signal, which is output to the first microprocessor 4-4 and the second microprocessor 4-5 through the RX and RX- pins.

[0025] The microcontroller 3 is an STM32F407 ARM processor; the wireless / wired bidirectional communication interface 2 is an Ethernet interface and a fiber optic interface, which can be selected by the user according to their needs.

[0026] In this embodiment, as Figure 8 As shown, to improve the data interaction speed between the first microprocessor 4-4 and the second microprocessor 4-5 in the wireless / wired communication module, a programmable logic device (CPLD) is bidirectionally connected to both microprocessors 4-4 and 4-5. The CPLD simulates the RAM storage area, aiming to increase the data interaction speed between the two microprocessors. Traditional microprocessor communication methods only allow serial communication, which has a low transmission rate and poor real-time performance, as one microprocessor can only receive data while the other sends it. This design utilizes a programmable logic device to simulate the external storage area between the microprocessors. The microprocessors and the programmable logic device are connected and access each other via an external data address bus. Both microprocessors can write data to and retrieve data from the programmable logic device at any time, achieving parallel data transmission and significantly improving the data interaction rate between the two microprocessors.

[0027] Furthermore, in order to ensure normal power supply to the wireless / wired communication module, the wireless / wired communication module disclosed in this embodiment also includes a power supply circuit 4-8 connected to the signal recovery circuit 4-2, the communication module 4-3, the first microprocessor 4-4, and the second microprocessor 4-5, respectively. The power supply circuit 4-8 is used to supply power to the signal recovery circuit 4-2, the communication module 4-3, the first microprocessor 2-24, the second microprocessor 4-5, the second network PHY 4-6, and the TTL fiber optic converter 4-7.

[0028] This utility model discloses an indoor and outdoor integrated monitoring and transmission platform for railway transportation based on fiber optic communication. The specific communication process is as follows: The user inputs information (such as equipment operating parameters) through the touchscreen 8-1. The handheld terminal 8 encodes the information into a digital signal, which is then modulated into a wireless signal by the built-in radio frequency module for external transmission. The fixed communication unit acts as a relay device, receiving the signal through the first antenna 9-1. The radio frequency circuit 9-2 modulates the radio frequency signal and outputs an analog signal. The conversion interface 9-3 digitizes the analog baseband signal (ADC conversion) and transmits it to the first processor 9-4. The first processor 9-4 performs protocol encapsulation processing. The processed digital signal is then converted back into an analog baseband signal through the conversion interface 9-3 and transmitted to the wireless / wired communication device through the radio frequency circuit 9-2. The fixed communication unit 9-1 and... The wireless / wired communication devices are connected wirelessly. After converting the wireless signal, the wireless / wired communication devices transmit it to the data processing terminal 6 located at the station. Specifically, the connection between the wireless / wired communication devices and the information processing module 6 can be configured according to the user. Therefore, the wireless / wired communication devices and the data processing terminal can be connected via optical fiber or Ethernet for data transmission. Finally, the data is transmitted to the host computer after passing through the information processing module 6 to complete information monitoring. In summary, the indoor and outdoor integrated monitoring and transmission platform disclosed in this utility model can, for railway sections without optical fiber channels, use the communication extension 9 as a relay node to transmit information wirelessly to a location with optical cable transmission conditions, and then convert the information into optical signals for transmission, realizing the real-time transmission of railway monitoring information back to the host computer for monitoring.

[0029] Meanwhile, when the wireless / wired communication module uses fiber optic mode for communication, the TTL fiber optic converter 4-7 in the wireless / wired communication module can convert the level data into optical signals and transmit them. The fiber optic transmission ensures that the signal transmission process is completely free from electromagnetic interference. When the wireless / wired communication module uses wireless radio frequency mode for communication, because wireless technology has strong anti-interference capabilities, electromagnetic interference can also be avoided. Therefore, it can effectively avoid problems such as data transmission errors, signal instability, or errors, and can effectively ensure the safety and reliability of railway signal transmission.

[0030] like Figure 4As shown, the power module disclosed in this embodiment includes a first power interface 1-2 and a power conversion circuit 1-3. The power conversion circuit 1-3 is connected to the wireless / wired bidirectional communication interface 2 and the microcontroller 3, respectively. The power conversion circuit 1-3 is used to regulate the power supply voltage and supply power to the wireless / wired bidirectional communication interface 2 and the microcontroller 3, respectively. The first power interface 1-2 provides protection for the input power. In order to achieve power supply, the indoor and outdoor integrated monitoring and transmission platform disclosed in this utility model also includes a power collection unit 5 set beside the track. The power collection unit 5 is connected to the wireless / wired communication device and the fixed communication extension 9, respectively. The power collection unit 5 is used to supply power to the wireless / wired communication device and the fixed communication extension 9. In actual use, the trackside power collection unit 5 is connected to the first power interface 1-2. When the site has the conditions to provide a DC 48V power supply, the DC power can be supplied to the communication device through the first power interface 1-2. If the site does not have the conditions to provide a DC power supply, the trackside power collection unit 5 can be connected to the communication device through the first power interface 1-2 to supply power to the communication device.

[0031] In this embodiment, the first power interface 1-2 is as follows: Figure 9 As shown, one end of the varistor RV2 is connected to the power input terminal VIN, and the other end is connected to the ground terminal GND; the two ends of the filter capacitors C3 and C4 are connected to the power input terminal VIN and the signal ground terminal GND, respectively; the two ends of the primary winding of the inductor L1 are connected to the power input terminal VIN and the signal ground terminal GND, respectively; the two ends of the secondary winding of the inductor L1 are connected to the inductor L2 and the capacitor C6, respectively; the two ends of the capacitor C6 are connected to the inductor L1 and the signal ground terminal GND, respectively; and the two ends of the diode D1 are connected to the two ends of the secondary winding of the inductor L1, respectively. One end of capacitor C5 is connected to diode D1, and the other end is connected to the signal ground terminal GND; the two ends of capacitors C1 and C2 are respectively connected to the two ends of diode D1; the two ends of inductor L2 are respectively connected to one end of the secondary winding of inductor L1 and one end of the primary winding of inductor L3; the primary winding of inductor L3 is respectively connected to one end of inductor L1 and capacitors C5 and C6; the secondary winding of inductor L3 is connected to the power interface output terminal VOUT and the signal ground terminal GND. Through the above design, the power interface filtering circuit design can be increased, the electromagnetic compatibility immunity can be improved, and thus the reliability of the power interface can be improved.

[0032] Specifically, in order to achieve voltage regulation, such as Figure 10As shown, the power conversion circuit 1-3 disclosed in this embodiment includes a DC48V input interface 1-31, a fuse 1-32, a diode 1-33, and a DC / DC48V to 12V power module-34 connected in sequence. It also includes a first DC / DC12V to 5V power module-35 and a second DC / DC12V to 5V power module-37 connected to the DC / DC48V to 12V power module-34, respectively. The output terminal of the first DC / DC12V to 5V power module-35 is connected in sequence to a DC / DC5V to 3.3V power module-36 and a microcontroller power supply interface 1-38. The microcontroller power supply interface 1-38 is connected to the microcontroller 3 to provide power. The second DC / DC12V to 5V power module-37 is connected to a wireless / wired bidirectional communication module power supply interface 1-39, which is used to connect to the wireless / wired bidirectional communication interface 2 to provide power.

[0033] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A comprehensive indoor and outdoor monitoring and transmission platform for railway transportation based on fiber optic communication, comprising a data processing terminal (6) and a host computer (7) interconnected, characterized in that, Also includes: A handheld terminal (8) is provided with a touch screen (8-1) for inputting information, and the handheld terminal (8) can convert the input information into a wireless signal; A fixed communication unit (9) is set up next to the track. The fixed communication unit (9) includes a first antenna (9-1), a radio frequency circuit (9-2), a conversion interface (9-3), and a first processor (9-4) connected in sequence in both directions. The first antenna (9-1) receives the wireless signal transmitted by the handheld terminal (8). The radio frequency circuit (9-2) modulates the wireless signal and outputs an analog baseband signal. The conversion interface (9-3) converts the analog baseband signal into a digital signal and transmits it to the first processor (9-4) for processing. The processed digital signal is converted back into an analog baseband signal through the conversion interface (9-3) and then output through the radio frequency circuit (9-2). The wireless / wired communication device has its signal input end connected to the first antenna (9-1) and its signal output end connected to the data processing terminal (6). The wireless / wired communication device converts the wireless signal into a wired signal and transmits it to the data processing terminal (6).

2. The indoor and outdoor integrated monitoring and transmission platform for railway transportation based on fiber optic communication according to claim 1, characterized in that, The radio frequency circuit (9-2) includes a receiving transformer (9-12), a first transimpedance amplifier (9-13), a first operational amplifier (9-14), and a first demodulator (9-15) connected in sequence to the first antenna (9-1). The output of the first demodulator (9-15) is connected to the input of the conversion interface (9-3). The wireless signal received by the first antenna (9-1) is coupled by the receiving transformer (9-12) to obtain a current signal. The first transimpedance amplifier (9-13) converts the current signal into a voltage signal and then... An operational amplifier (9-14) amplifies the signal. The radio frequency circuit (9-2) further includes a first frequency generating circuit (9-11) and a first frequency divider (9-16) that cooperate to provide the local oscillator signal. The output of the first frequency generating circuit (9-11) is connected to the first frequency divider (9-16), and the output of the first frequency divider (9-16) is connected to the first demodulator (9-15). The amplified high-frequency signal and the local oscillator signal are input to the first demodulator (9-15) to demodulate the analog baseband signal, which is then input to the conversion interface (9-3). The circuit (9-2) also includes a modem chip (9-17), a phase detector (9-18), an oscillator (9-19), and a power amplifier (9-10) connected in sequence to the conversion interface (9-3). The output of the first frequency generating circuit (9-11) is connected to the phase detector (9-18), and the output of the first frequency divider (9-16) is connected to the modem chip (9-17). The modem chip (9-17) modulates the analog baseband signal into a wireless signal, and the phase detector (9-18) compares the modulated signals. The phase difference between the wireless signal and the local oscillator signal is output to the oscillator (9-19). The oscillator (9-19) modulates the frequency of the wireless signal to a specified frequency. The power amplifier (9-10) amplifies the wireless signal output by the oscillator (9-19). The output of the power amplifier (9-10) is connected to the first antenna (9-1) to realize signal transmission. The output of the power amplifier (9-10) is also connected to the power controller (9-01). The power controller (9-01) controls the power of the wireless signal.

3. The indoor and outdoor integrated monitoring and transmission platform for railway transportation based on fiber optic communication according to claim 2, characterized in that, The handheld terminal (8) further includes a second processor (8-2), a first network PHY (8-3), a wireless module (8-4), and a second antenna (8-5) that are sequentially and bidirectionally connected to the touch screen (8-1). The second processor (8-2) is used to process the input signal. The first network PHY (8-3) encodes and modulates the processed digital signal to generate an analog signal. The wireless module (8-4) is used to convert the analog signal into a wireless signal and finally output it through the second antenna (8-5).

4. The indoor and outdoor integrated monitoring and transmission platform for railway transportation based on fiber optic communication according to claim 2, characterized in that, The fixed communication extension (9) further includes an Ethernet interface (9-5) and a second power interface (9-6) respectively connected to the first processor (9-4). The Ethernet interface (9-5) is used to configure the IP and gateway of the fixed communication extension (9), and the second power interface (9-6) is used to supply power to the fixed communication extension (9).

5. A comprehensive indoor and outdoor monitoring and transmission platform for railway transportation based on fiber optic communication according to claim 2, characterized in that, The wireless / wired communication device includes a signal transmission module, which includes a housing and an electronic circuit board inside the housing. The electronic circuit board integrates a power module, a wireless / wired bidirectional communication interface (2), and a microcontroller (3). It also includes a wireless / wired communication module bidirectionally connected to the wireless / wired bidirectional communication interface (2). The wireless / wired communication module is connected to the first antenna (9-1). The wireless / wired communication module receives wireless signals from the first antenna (9-1). The wireless / wired communication module converts the wireless signals into digital signals and transmits them to the microcontroller (3) for processing through the wireless / wired bidirectional communication interface (2). The signal processed by the microcontroller (3) is transmitted to the data processing terminal (6) via a wired connection.

6. The indoor and outdoor integrated monitoring and transmission platform for railway transportation based on fiber optic communication according to claim 5, characterized in that, The wireless / wired communication module includes a third antenna (4-1), a signal recovery circuit (4-2), and a communication module (4-3) connected bidirectionally in sequence. The third antenna (4-1) receives wireless signals. The signal recovery circuit (4-2) receives wireless signals and demodulates them into analog baseband signals. The communication module (4-3) performs A / D conversion on the analog baseband signals. The communication module (4-3) is connected to a first microprocessor (4-4) and a second microprocessor (4-5). The first microprocessor (4-4) and the second microprocessor (4-5) are electrically connected to each other. The processor (4-5) analyzes and compares the signal after A / D conversion. The first microprocessor (4-4) is bidirectionally connected to the second network PHY (4-6). The second network PHY (4-6) converts the signal transmitted by the first microprocessor (4-4) into an Ethernet signal. The second microprocessor (4-5) is bidirectionally connected to the TTL fiber optic converter (4-7). The TTL fiber optic converter (4-7) converts the signal transmitted by the second microprocessor (4-5) into a fiber optic signal. The outputs of the second network PHY (4-6) and the TTL fiber optic converter (4-7) are both connected to the wireless / wired bidirectional communication interface (2).

7. The indoor and outdoor integrated monitoring and transmission platform for railway transportation based on fiber optic communication according to claim 6, characterized in that, The signal recovery circuit (4-2) includes a second transimpedance amplifier (4-21), a second operational amplifier (4-22), and a second demodulator (4-23) connected in sequence to the antenna (4-1). The output of the second demodulator (4-23) is connected to the communication module (4-3). The signal recovery circuit (4-2) also includes a second frequency generating circuit (4-24) and a second frequency divider (4-25) that cooperate to provide the local oscillator signal. The output of the second frequency generating circuit (4-24) is connected to the second frequency divider (4-25), and the output of the second frequency divider (4-25) is connected to the second demodulator (4-23). ​​The second transimpedance amplifier (4-21) converts the current signal into a voltage signal, and the second operational amplifier (4-22) amplifies the voltage signal. The amplified high-frequency signal and the local oscillator signal are input to the second demodulator (4-23) to demodulate the analog baseband signal and input to the communication module (4-3).

8. A comprehensive indoor and outdoor monitoring and transmission platform for railway transportation based on fiber optic communication according to claim 6, characterized in that, A programmable logic device is provided between the first microprocessor (4-4) and the second microprocessor (4-5) and is bidirectionally connected to them respectively.

9. A comprehensive indoor and outdoor monitoring and transmission platform for railway transportation based on fiber optic communication according to claim 6, characterized in that, The wireless / wired communication module further includes a power supply circuit (4-8) connected to the signal recovery circuit (4-2), the communication module (4-3), the first microprocessor (4-4), and the second microprocessor (4-5), respectively. The power supply circuit (4-8) is used to supply power to the signal recovery circuit (4-2), the communication module (4-3), the first microprocessor (4-4), the second microprocessor (4-5), the second network PHY (4-6), and the TTL fiber optic converter (4-7).

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