Wide-narrow band fusion carrier communication processing circuit suitable for long-distance track communication

Abstract

The invention discloses a wide-narrow band fusion carrier communication processing circuit suitable for long-distance track communication. Comprising a power line interface connector ACIN, a wide-narrow band fusion carrier communication processing circuit, an analog front end H-AFE, an analog front end L-AFE, a digital baseband processor DBB, a FLASH memory, a gigabit Ethernet PHY, a gigabit Ethernet interface, an RS-485 transceiver, an RS-485 interface, an AC-DC power conversion and PMIC power management. The invention can effectively solve the problem of mutual interference between simultaneous transmission of wide and narrow bands and the problem of bandwidth reduction during communication of multiple groups of equipment in the same power supply line. The system can be widely applied to specific application scenes where network cables or optical fibers are inconvenient to lay in the field of rail robots, and transmission of broadband Ethernet data such as video monitoring and transmission of terminal equipment control signals are achieved through a power supply line. The overall design is simple, easy to use, safe and reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of power line communication and integrated track power supply, and in particular to a wide-narrowband fusion carrier communication processing circuit suitable for long-distance track communication. Background Art

[0002] Power Line Communication (PLC) refers to a communication technology that uses power lines as information transmission media to transmit data and media signals. This technology uses a specific frequency band to transmit signals. When sending data, GMSK or OFDM modulation technology is used to load high-frequency signals carrying information onto DC or AC power lines. Power lines are used as transmission media to carry data, images and other information. At the receiving end, after the modulated signal is filtered out by a filter, the demodulation equipment receiving the information separates the high-frequency signal from the DC or AC signal. After demodulation, the original communication signal can be obtained.

[0003] At present, the transmission rates of broadband power line communications in domestic and foreign markets are mainly 200Mbps, 500Mbps and 1Gbps, etc.; the transmission rates of narrowband power line communications are mainly 1.2Kbps, 4.8Kbps and 5.4Kbps, etc.

[0004] Long-distance wide-narrowband fusion carrier communication has both broadband and narrowband power line carrier communication functions. Broadband and narrowband carrier communications use different frequency bands to transmit broadband and narrowband data respectively. The broadband physical layer transmission rate is 1Gbps, and the narrowband power line communication rate is 2.5kbps ~ 5kbps. It can realize the media conversion of 1 10 / 100 / 1000Base-TX Ethernet and 1 power line communication, as well as the media conversion of 1 RS-485 serial port and 1 power line communication. It can effectively solve the problems of mutual interference and the reduction of bandwidth when multiple groups of devices communicate on the same power supply line.

[0005] Broadband and narrowband carrier communications use different frequency bands respectively. The broadband and narrowband data are processed separately by the broadband and narrowband fusion carrier communication processing circuit, which can effectively solve the mutual interference problem and the bandwidth reduction problem when multiple groups of devices communicate on the same power supply line. This design is simple, easy to use, safe and reliable.

[0006] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to those skilled in the art. Summary of the invention

[0007] In view of the problems existing in the prior art, the object of the present invention is to provide a wide-narrowband fused carrier communication processing circuit suitable for long-distance rail communication.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions: A wide-narrowband fusion carrier communication processing circuit suitable for long-distance rail communication includes a power line interface connector AC_IN, a wide-narrowband fusion carrier communication processing circuit, an analog front end H-AFE, an analog front end L-AFE, a digital baseband processor DBB, a FLASH flash memory, a Gigabit Ethernet PHY, a Gigabit Ethernet interface, an RS-485 transceiver, an RS-485 interface, an AC-DC power conversion, and a PMIC power management; wherein, The power line interface connector AC_IN is used to provide power for the entire system; the AC-DC power conversion and PMIC power management are used to ensure the normal power supply requirements and power-on timing of the entire system; the FLASH flash memory is used for data storage to ensure the normal operation of the digital baseband processor DBB; the wide-narrowband fusion carrier communication processing circuit realizes the media conversion of 1 10 / 100 / 1000Base-TX Ethernet and 1 power line communication, as well as the media conversion of 1 RS-485 serial port and 1 power line communication by processing broadband and narrowband data separately.

[0009] Further, the wide-narrowband integrated carrier communication processing circuit includes a first capacitor C1, a first inductor L1, a second capacitor C2, a first resistor R1, a third capacitor C3, a fourth capacitor C4, a second inductor L2, a third inductor L3, a fifth capacitor C5, a sixth capacitor C6, a first diode D1, a second resistor R2, a fourth inductor L4, a first transformer T1, a fifth inductor L5, a sixth inductor L6, a third resistor R3, a seventh inductor L7, a fourth resistor R4, an eighth inductor L8, a seventh capacitor C7, an eighth capacitor C8, a second diode D2, a fifth resistor R5, a ninth inductor L9 and a second transformer T2; wherein, One end of the first capacitor C1 is connected to the AC220_L signal and Pin3 of the first inductor L1, and the other end is connected to the AC220_N signal and Pin1 of the first inductor L1. At the same time, Pin4 of the first inductor L1 is connected to one end of the second capacitor C2, one end of the first resistor R1, one end of the third capacitor C3, and one end of the second inductor L2. Pin2 of the first inductor L1 is connected to the other end of the second capacitor C2, the other end of the first resistor R1, one end of the fourth capacitor C4, and one end of the third inductor L3. The other end of the third capacitor C3 and the other end of the fourth capacitor C4 are simultaneously connected to the ground. The other end of the second inductor L2 is connected to one end of the fifth capacitor C5, and the third The other end of the inductor L3 is connected to one end of the sixth capacitor C6, the other end of the fifth capacitor C5 is connected to one end of the first diode D1 and Pin4 of the first transformer T1, the other end of the sixth capacitor C6 is connected to the other end of the first diode D1 and Pin1 of the first transformer T1, Pin2 and Pin3 of the first transformer T1 are commonly connected to one end of the fourth inductor L4, the other end of the fourth inductor L4 is connected to one end of the second resistor R2, the other end of the second resistor R2 is connected to GND, Pin5 of the first transformer T1 is connected to the H_IN_TXP signal, Pin6 of the first transformer T1 is connected to the H_IN_TXN signal, and Pi of the first transformer T1 is connected to the H_IN_TXP signal. n7 is connected to the H_IN_RXP signal, Pin8 of the first transformer T1 is connected to the H_IN_RXN signal, one end of the fifth inductor L5 is connected to the AC220_L signal, and the other end is connected to one end of the third resistor R3 and one end of the seventh inductor L7, the other end of the third resistor R3 and the other end of the seventh inductor L7 are simultaneously connected to one end of the seventh capacitor C7, one end of the sixth inductor L6 is connected to the AC220_N signal, and the other end is connected to one end of the fourth resistor R4 and one end of the eighth inductor L8, the other end of the fourth resistor R4 and the other end of the eighth inductor L8 are simultaneously connected to one end of the eighth capacitor C8, the other end of the seventh capacitor C7 is connected to one end of the second diode D2 The other end of the eighth capacitor C8 is connected to the other end of the second diode D2 and Pin1 of the second transformer T2, Pin2 and Pin3 of the second transformer T2 are commonly connected to one end of the ninth inductor L9, the other end of the ninth inductor L9 is connected to one end of the fifth resistor R5, the other end of the fifth resistor R5 is connected to GND, Pin5 of the second transformer T2 is connected to the L_IN_TXP signal, Pin6 of the second transformer T2 is connected to the L_IN_TXN signal, Pin7 of the second transformer T2 is connected to the L_IN_RXP signal, and Pin8 of the second transformer T2 is connected to the L_IN_RXN signal.

[0010] By adopting the above technical solution, the present invention has the following beneficial effects: The present invention can effectively solve the interference between broadband and narrowband transmission, as well as the bandwidth reduction when multiple groups of devices communicate on the same power supply line. It can be widely used in specific application scenarios such as the field of rail robots where it is inconvenient to lay network cables or optical fibers, and use power supply lines to realize the transmission of broadband Ethernet data such as video surveillance and the transmission of terminal device control signals. The overall design is simple, easy to use, safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 The schematic diagram of the invention is a principle block diagram of a wide-narrowband fusion carrier communication processing circuit suitable for long-distance rail communication.

[0013] Figure 2 It is a schematic diagram of the wide-narrowband fusion carrier communication processing circuit of the present invention. DETAILED DESCRIPTION

[0014] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0016] Combination Figure 1 As shown, the wide-narrowband fusion carrier communication processing circuit suitable for long-distance rail communication proposed by the present invention includes a power line interface connector AC_IN, a wide-narrowband fusion carrier communication processing circuit, an analog front end H-AFE, an analog front end L-AFE, a digital baseband processor DBB, FLASH flash memory, Gigabit Ethernet PHY, Gigabit Ethernet interface, RS-485 transceiver, RS-485 interface, AC-DC power conversion and PMIC power management; wherein, The power line interface connector AC_IN is used to provide power for the entire system; the AC-DC power conversion and PMIC power management are used to ensure the normal power supply requirements and power-on timing of the entire system; the FLASH flash memory is used for data storage to ensure the normal operation of the digital baseband processor DBB; the wide-narrowband fusion carrier communication processing circuit realizes the media conversion of 1 10 / 100 / 1000Base-TX Ethernet and 1 power line communication, as well as the media conversion of 1 RS-485 serial port and 1 power line communication by processing broadband and narrowband data separately.

[0017] Combination Figure 2As shown, the wide-narrowband integrated carrier communication processing circuit includes a first capacitor C1, a first inductor L1, a second capacitor C2, a first resistor R1, a third capacitor C3, a fourth capacitor C4, a second inductor L2, a third inductor L3, a fifth capacitor C5, a sixth capacitor C6, a first diode D1, a second resistor R2, a fourth inductor L4, a first transformer T1, a fifth inductor L5, a sixth inductor L6, a third resistor R3, a seventh inductor L7, a fourth resistor R4, an eighth inductor L8, a seventh capacitor C7, an eighth capacitor C8, a second diode D2, a fifth resistor R5, a ninth inductor L9, and a second transformer T2.One end of the first capacitor C1 is connected to the AC220_L signal and Pin3 of the first inductor L1, and the other end is connected to the AC220_N signal and Pin1 of the first inductor L1. At the same time, Pin4 of the first inductor L1 is connected to one end of the second capacitor C2, one end of the first resistor R1, one end of the third capacitor C3, and one end of the second inductor L2. Pin2 of the first inductor L1 is connected to the other end of the second capacitor C2, the other end of the first resistor R1, one end of the fourth capacitor C4, and one end of the third inductor L3. The other end of the third capacitor C3 and the other end of the fourth capacitor C4 are connected to the ground at the same time. The other end of the second inductor L2 is connected to one end of the fifth capacitor C5, and the third The other end of the inductor L3 is connected to one end of the sixth capacitor C6, the other end of the fifth capacitor C5 is connected to one end of the first diode D1 and Pin4 of the first transformer T1, the other end of the sixth capacitor C6 is connected to the other end of the first diode D1 and Pin1 of the first transformer T1, Pin2 and Pin3 of the first transformer T1 are commonly connected to one end of the fourth inductor L4, the other end of the fourth inductor L4 is connected to one end of the second resistor R2, the other end of the second resistor R2 is connected to GND, Pin5 of the first transformer T1 is connected to the H_IN_TXP signal, Pin6 of the first transformer T1 is connected to the H_IN_TXN signal, and Pi of the first transformer T1 is connected to the H_IN_TXP signal. n7 is connected to the H_IN_RXP signal, Pin8 of the first transformer T1 is connected to the H_IN_RXN signal, one end of the fifth inductor L5 is connected to the AC220_L signal, and the other end is connected to one end of the third resistor R3 and one end of the seventh inductor L7, the other end of the third resistor R3 and the other end of the seventh inductor L7 are simultaneously connected to one end of the seventh capacitor C7, one end of the sixth inductor L6 is connected to the AC220_N signal, and the other end is connected to one end of the fourth resistor R4 and one end of the eighth inductor L8, the other end of the fourth resistor R4 and the other end of the eighth inductor L8 are simultaneously connected to one end of the eighth capacitor C8, the other end of the seventh capacitor C7 is connected to one end of the second diode D2 The other end of the eighth capacitor C8 is connected to the other end of the second diode D2 and Pin1 of the second transformer T2, Pin2 and Pin3 of the second transformer T2 are commonly connected to one end of the ninth inductor L9, the other end of the ninth inductor L9 is connected to one end of the fifth resistor R5, the other end of the fifth resistor R5 is connected to GND, Pin5 of the second transformer T2 is connected to the L_IN_TXP signal, Pin6 of the second transformer T2 is connected to the L_IN_TXN signal, Pin7 of the second transformer T2 is connected to the L_IN_RXP signal, and Pin8 of the second transformer T2 is connected to the L_IN_RXN signal.

[0018] The workflow of loading broadband Ethernet signals onto AC power lines is as follows: Gigabit Ethernet PHY receives broadband Ethernet signals through the Gigabit Ethernet interface and processes them to realize data conversion from the physical medium to the data link layer; the digital baseband processor DBB converts the processed broadband Ethernet digital signal into an analog signal and sends it to the analog front end H-AFE for amplification; the amplified and filtered signal is then electrically isolated and impedance matched from the external AC power supply through the wide-narrowband fusion carrier communication processing circuit, and finally the processed broadband carrier signal is coupled to the AC power line through the power line interface connector AC_IN for transmission.

[0019] The workflow of loading narrowband serial signals onto AC power lines is as follows: the RS-485 transceiver receives narrowband serial signals through the RS-485 interface and processes them to realize the level conversion from RS-485 to UART; the digital baseband processor DBB converts the processed narrowband RS-485 digital signal into an analog signal and sends it to the analog front end L-AFE for amplification; the amplified and filtered signal is then electrically isolated and impedance matched from the external AC power supply through the wide-narrowband fusion carrier communication processing circuit, and finally the processed narrowband carrier signal is coupled to the AC power line through the power line interface connector AC_IN for transmission.

[0020] Separating broadband Ethernet signals from AC power lines: The broadband and narrowband fusion carrier communication processing circuit filters and decouples the broadband carrier signal input from the power line interface connector AC_IN, and then outputs it to the analog front end H-AFE; the digital baseband processor DBB converts the carrier signal output from the analog front end H-AFE into a broadband Ethernet digital signal; the broadband Ethernet digital signal is converted from the data link layer to the physical medium through the Gigabit Ethernet PHY, and then the broadband Ethernet signal is transmitted through the Gigabit Ethernet interface; The workflow for separating narrowband serial signals from AC power lines: The wide-narrowband fusion carrier communication processing circuit filters, decouples, and processes the narrowband carrier signal input by the power line interface connector AC_IN, and then outputs it to the analog front end L-AFE; the digital baseband processor DBB converts the carrier signal output by the analog front end L-AFE into a narrowband serial digital signal; the narrowband serial digital signal is converted from UART to RS-485 through the RS-485 transceiver, and then the narrowband serial signal is transmitted through the RS-485 interface.

[0021] The broadband and narrowband carrier communications of the present invention adopt different frequency bands respectively, and the broadband and narrowband data are processed separately through the wide-narrowband fusion carrier communication processing circuit, which can solve the interference problem between the broadband signal and the narrowband signal when they are transmitted simultaneously, and the bandwidth reduction problem when multiple groups of equipment communicate on the same power supply line.

[0022] The present invention has both broadband and narrowband power line carrier communication functions, and can realize the media conversion between 1 10 / 100 / 1000Base-TX Ethernet and 1 power line communication, as well as the media conversion between 1 RS-485 serial port and 1 power line communication. It can be widely used in specific application scenarios such as the field of rail robots where it is inconvenient to lay network cables or optical fibers. While using the power supply line to meet the system power supply, it can realize the transmission of broadband Ethernet data such as video monitoring and the transmission of terminal equipment control signals. The overall design is simple, easy to use, safe and reliable.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. 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 replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wide-narrowband fusion carrier communication processing circuit suitable for long-distance rail communication, characterized in that: It includes power line interface connector AC_IN, wide-narrowband fusion carrier communication processing circuit, analog front end H-AFE, analog front end L-AFE, digital baseband processor DBB, FLASH flash memory, Gigabit Ethernet PHY, Gigabit Ethernet interface, RS-485 transceiver, RS-485 interface, AC-DC power conversion and PMIC power management; among them, The power line interface connector AC_IN is used to provide power for the entire system; the AC-DC power conversion and PMIC power management are used to ensure the normal power supply requirements and power-on timing of the entire system; the FLASH flash memory is used for data storage to ensure the normal operation of the digital baseband processor DBB; the wide-narrowband fusion carrier communication processing circuit realizes the media conversion of 1 10 / 100 / 1000Base-TX Ethernet and 1 power line communication, as well as the media conversion of 1 RS-485 serial port and 1 power line communication by processing broadband and narrowband data separately.

2. The wide-narrowband fusion carrier communication processing circuit suitable for long-distance rail communication according to claim 1 is characterized in that: The wide-narrowband integrated carrier communication processing circuit includes a first capacitor C1, a first inductor L1, a second capacitor C2, a first resistor R1, a third capacitor C3, a fourth capacitor C4, a second inductor L2, a third inductor L3, a fifth capacitor C5, a sixth capacitor C6, a first diode D1, a second resistor R2, a fourth inductor L4, a first transformer T1, a fifth inductor L5, a sixth inductor L6, a third resistor R3, a seventh inductor L7, a fourth resistor R4, an eighth inductor L8, a seventh capacitor C7, an eighth capacitor C8, a second diode D2, a fifth resistor R5, a ninth inductor L9 and a second transformer T2; wherein, One end of the first capacitor C1 is connected to the AC220_L signal and Pin3 of the first inductor L1, and the other end is connected to the AC220_N signal and Pin1 of the first inductor L1. At the same time, Pin4 of the first inductor L1 is connected to one end of the second capacitor C2, one end of the first resistor R1, one end of the third capacitor C3, and one end of the second inductor L2. Pin2 of the first inductor L1 is connected to the other end of the second capacitor C2, the other end of the first resistor R1, one end of the fourth capacitor C4, and one end of the third inductor L3. The other end of the third capacitor C3 and the other end of the fourth capacitor C4 are simultaneously connected to the ground. The other end of the second inductor L2 is connected to one end of the fifth capacitor C5, and the third The other end of the inductor L3 is connected to one end of the sixth capacitor C6, the other end of the fifth capacitor C5 is connected to one end of the first diode D1 and Pin4 of the first transformer T1, the other end of the sixth capacitor C6 is connected to the other end of the first diode D1 and Pin1 of the first transformer T1, Pin2 and Pin3 of the first transformer T1 are commonly connected to one end of the fourth inductor L4, the other end of the fourth inductor L4 is connected to one end of the second resistor R2, the other end of the second resistor R2 is connected to GND, Pin5 of the first transformer T1 is connected to the H_IN_TXP signal, Pin6 of the first transformer T1 is connected to the H_IN_TXN signal, and Pi of the first transformer T1 is connected to the H_IN_TXP signal. n7 is connected to the H_IN_RXP signal, Pin8 of the first transformer T1 is connected to the H_IN_RXN signal, one end of the fifth inductor L5 is connected to the AC220_L signal, and the other end is connected to one end of the third resistor R3 and one end of the seventh inductor L7, the other end of the third resistor R3 and the other end of the seventh inductor L7 are simultaneously connected to one end of the seventh capacitor C7, one end of the sixth inductor L6 is connected to the AC220_N signal, and the other end is connected to one end of the fourth resistor R4 and one end of the eighth inductor L8, the other end of the fourth resistor R4 and the other end of the eighth inductor L8 are simultaneously connected to one end of the eighth capacitor C8, the other end of the seventh capacitor C7 is connected to one end of the second diode D2 The other end of the eighth capacitor C8 is connected to the other end of the second diode D2 and Pin1 of the second transformer T2, Pin2 and Pin3 of the second transformer T2 are commonly connected to one end of the ninth inductor L9, the other end of the ninth inductor L9 is connected to one end of the fifth resistor R5, the other end of the fifth resistor R5 is connected to GND, Pin5 of the second transformer T2 is connected to the L_IN_TXP signal, Pin6 of the second transformer T2 is connected to the L_IN_TXN signal, Pin7 of the second transformer T2 is connected to the L_IN_RXP signal, and Pin8 of the second transformer T2 is connected to the L_IN_RXN signal.

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