CN210274114U

CN210274114U - Station radio station control box remote transmission equipment based on E1

Info

Publication number: CN210274114U
Application number: CN201921180662.6U
Authority: CN
Inventors: 罗群; 李世凯
Original assignee: Tianjin 712 Communication and Broadcasting Co Ltd
Current assignee: Tianjin 712 Mobile Communication Co Ltd
Priority date: 2019-07-25
Filing date: 2019-07-25
Publication date: 2020-04-07
Anticipated expiration: 2029-07-25

Abstract

The utility model discloses a station radio station control box teletransmission equipment based on E1. The device comprises a switching power supply chip, an LDO power supply chip, an RS-485 interface chip, a CODEC chip, a processor chip, an Ethernet E1 bridge chip, an SDRAM chip, a sending drive chip, a receiving drive chip and a network transformer; the two same devices work in pairs, the station radio station end transmission device is connected with a station radio station through a communication interface, and an E1 interface is accessed into an E1 transmission line; the control box end transmission equipment is connected with the control box through a communication interface and is accessed into an E1 transmission line through an E1 interface; the device converts the analog audio signal and the RS-485 data transmitted by the station radio station and the control box into E1 data, and then carries out remote transmission through an E1 transmission line, thereby realizing the remote transmission of data and voice communication between the station radio station and the control box through an E1 transmission line and improving the flexibility of a train dispatching system architecture.

Description

Station radio station control box remote transmission equipment based on E1

Technical Field

The utility model relates to a radio station control box teletransmission equipment, in particular to station radio station control box teletransmission equipment based on E1.

Background

At present, the railway station radio station and the control box in China are generally connected in a wired mode, an RS-485 bus is generally adopted for instruction data transmission, and an analog audio signal is adopted for voice transmission. Due to the fact that the wired transmission distance between the RS-485 bus and the analog audio is limited, the requirement for pulling the control box far for use in field engineering cannot be met. E1 transmission lines are laid in a plurality of railway station areas and among stations in China, E1 is 30-path Pulse Code Modulation (PCM), 30 voice channels and 2 control channels are compounded into a high-speed channel with 2.048Mbit/s by adopting a synchronous time division multiplexing technology, optical fibers can be used as transmission media, and the high-speed channel has data remote transmission capability, but the station radio and a control box interface cannot be directly accessed into the E1 transmission line for remote transmission.

Disclosure of Invention

In view of the problem that prior art exists, in order to satisfy the demand of using control box and station radio station to stretch away, realize carrying out data and voice communication's teletransmission between railway station radio station and control box through E1 transmission line, improve the flexibility of arranging and transferring system architecture, the utility model provides a station radio station control box teletransmission equipment based on E1.

The utility model adopts the technical proposal that: the utility model provides a station radio station control box teletransmission equipment based on E1 which characterized in that: the device comprises a switching power supply chip with the model of LM22670, an LDO power supply chip with the model of LP5907MFX-1.8, an RS-485 interface chip with the model of SN65HVD75, a CODEC chip with the model of TLV320AIC3106C, a processor chip with the model of LPC4337, an Ethernet E1 bridge chip with the model of SE0164, an SDRAM chip with the model of MT48LC8M16A2, a sending driving chip with the model of 74LS240, a receiving driving chip with the model of DS34C86 and a network transformer with the model of PT 22-1161; the input end of the switching power supply chip is connected with an external DC12V for power supply, and the output end of the switching power supply chip is connected with the input end of the LDO power supply chip and the power supply input end of other devices DC3.3V of the device; the output end of the LDO power chip is connected with the power supply input end of other devices DC1.8V of the equipment; the 485 interface of the RS-485 interface chip is connected with the RS-485 data interface of the station radio station or the control box, and the TTL interface is connected with the UART1 interface of the processor chip; an MIC3L pin of the CODEC chip is connected with an audio output pin of a station radio station or a control box, and an LEFT _ LOP pin is connected with an audio input pin of the station radio station or the control box; the IIC interface and the IIS interface are connected with the processor chip; an MII interface of the Ethernet E1 bridge chip is connected with an MII interface of the processor chip, an SDRAM interface is connected with an SDRAM chip, an E1_ OUT interface is connected with an INPUT interface of the sending driving chip, and an E1_ IN interface is connected with an OUTPUT interface of the receiving driving chip; the network transformer 1-2CT interface is connected with an OUTPUT interface of the sending driving chip, the 1-1CT interface is connected with an external E1 transmission line INPUT interface, the 2-1CT interface is connected with an INPUT interface of the receiving driving chip, and the 2-2CT interface is connected with an external E1 transmission line OUTPUT interface.

The utility model discloses a theory of operation is: the external power supply of the DC12V is converted into DC3.3V through a switching power supply chip, and then power is supplied to other devices of the equipment; DC3.3V is converted DC1.8V by the LDO power chip to supply power to other devices of the device; data conversion between the RS-485 bus and the TTL level serial port is carried out through the RS-485 interface chip, and instruction data communication between a station radio station or a control box and a processor chip is achieved; the processor chip controls and manages the CODEC chip through the IIC interface, performs digital audio data communication with the CODEC chip through the IIS interface, and performs Ethernet data communication with the Ethernet E1 bridge chip through the MII interface; the CODEC chip converts analog audio signals output by the audio output pin of the station radio station or the control box into digital audio data and transmits the digital audio data to the processor chip, and converts the digital audio data received from the processor chip into analog audio signals and transmits the analog audio signals to the audio input pin of the station radio station or the control box; the data transmitted by the RS-485 interface chip and the CODEC chip are packaged and processed by the processor chip, converted into Ethernet data and transmitted to the Ethernet E1 bridge chip, the Ethernet data transmitted by the Ethernet E1 bridge chip is subjected to subpackage processing, the instruction data is transmitted to the RS-485 interface chip, and the digital audio data is transmitted to the CODEC chip; the Ethernet E1 bridge chip converts the Ethernet data transmitted by the processor chip into E1 data and transmits the E1 data to the sending drive chip, and converts the E1 data transmitted by the receiving drive chip into Ethernet data and transmits the Ethernet data to the processor chip; enhancing the driving capability of the E1 sending data signal through a sending driving chip; enhancing the driving capability of receiving the E1 data signal through the receiving driving chip; e1 data sent and received are subjected to transmission isolation protection and signal enhancement through a network transformer; and the data transceiving and buffering of the Ethernet E1 bridge chip are carried out through the SDRAM chip. The remote transmission equipment at the station radio station end converts an analog audio signal output by the station radio station into digital audio data, the digital audio data and instruction data sent by the station radio station are packaged and processed on a processor chip, the digital audio data and the instruction data are converted into Ethernet data and then transmitted to an Ethernet E1 bridge chip, the Ethernet data are converted into E1 data and then transmitted to an E1 transmission line, the E1 transmission line is transmitted to the remote transmission equipment at the control box end, meanwhile, the E1 data received through the E1 transmission line are converted into the Ethernet data on an Ethernet E1 bridge chip and then transmitted to the processor chip for subpackage processing, the instruction data are transmitted to a station radio station data interface, the digital audio data are transmitted to a CODEC chip and converted into analog audio signals and then transmitted to a station radio station audio input pin; the control box end remote transmission equipment converts an analog audio signal output by the control box into digital audio data, the digital audio data and instruction data sent by the control box are packaged and processed in a processor chip, the converted data are transmitted to an Ethernet E1 bridge chip after being converted into Ethernet data, the converted data are converted into E1 data and sent to an E1 transmission line, the E1 transmission line is transmitted to station end remote transmission equipment, meanwhile, E1 data received through an E1 line are converted into the Ethernet data in an Ethernet E1 bridge chip and then transmitted to the processor chip for subpackage processing, the instruction data are transmitted to a control box data interface, the digital audio data are transmitted to a CODEC chip, the converted data are converted into analog audio signals, and then the analog audio signals are transmitted to a control box audio input pin.

The utility model has the advantages that: the remote transmission of data and voice communication between the railway station radio station and the control box is realized through the E1 transmission line, and the flexibility of the train dispatching system architecture is improved.

Drawings

FIG. 1 is a schematic view of the connection of the utility model;

fig. 2 is a schematic circuit diagram of the remote transmission device of the control box of fig. 1.

Detailed Description

For a clearer understanding of the present invention, reference is made to the following detailed description of the embodiments taken in conjunction with the accompanying drawings.

As shown in fig. 1, two identical remote transmission devices of the control box work in pairs, the transmission device at the station radio station end is connected with the station radio station through a communication interface, and an E1 interface is accessed into an E1 transmission line; the transmission equipment at the control box end is connected with the control box through a communication interface and is accessed into an E1 transmission line through an E1 interface; the transmission equipment converts the analog audio signal and the RS-485 data transmitted by the station radio station and the control box into E1 data, then carries out remote transmission through an E1 transmission line, and simultaneously converts the E1 data received from an E1 line into an analog audio signal and RS-485 data to be transmitted to the station radio station and the control box; the remote transmission of data and voice communication between the railway station radio station and the control box is realized through the E1 transmission line, and the flexibility of the train dispatching system architecture is improved.

As shown in fig. 2, a remote transmission device of a station radio station control box based on E1 includes a switching power supply chip with model No. LM22670, an LDO power supply chip with model No. LP5907MFX-1.8, an RS-485 interface chip with model No. SN65HVD75, a CODEC chip with model No. TLV320AIC3106C, a processor chip with model No. LPC4337, an ethernet E1 bridge chip with model No. SE0164, an SDRAM chip with model No. MT48LC8M16a2, a transmission driving chip with model No. 74LS240, a reception driving chip with model No. DS34C86, and a network transformer with model No. PT 22-1161.

The input end of the switch power supply chip is connected with an external DC12V for power supply, the output end of the switch power supply chip is connected with the input end of the LDO power supply chip and the power supply input end of the other device DC3.3V for equipment, and the output end of the LDO power supply chip is connected with the power supply input end of the other device DC1.8V for equipment; the external power supply of the DC12V is converted into DC3.3V by a switching power supply chip to supply power to other devices of the equipment, and the DC3.3V is converted into DC1.8V by an LDO power supply chip to supply power to other devices of the equipment.

The 485 interface of the RS-485 interface chip is connected with an RS-485 data interface of a station radio station or a control box, and the TTL interface is connected with a UART1 interface of the processor chip; and data conversion between the RS-485 bus and the TTL level serial port is carried out through the RS-485 interface chip, so that instruction data communication between the station radio station or the control box and the processor chip is realized.

A CODEC chip MIC3L pin is connected with an audio output pin of a station radio station or a control box, and a LEFT _ LOP pin is connected with an audio input pin of the station radio station or the control box; the IIC interface and the IIS interface are connected with the processor chip; the processor chip controls and manages the CODEC chip through the IIC interface and communicates digital audio data with the CODEC chip through the IIS interface; the CODEC chip converts analog audio signals output by the audio output pin of the station radio station or the control box into digital audio data and transmits the digital audio data to the processor chip, and converts the digital audio data received from the processor chip into analog audio signals and transmits the analog audio signals to the audio input pin of the station radio station or the control box.

An Ethernet E1 bridge chip MII interface is connected with a processor chip MII interface, an E1_ OUT interface is connected with a sending driving chip INPUT interface, an E1_ IN interface is connected with a receiving driving chip OUTPUT interface, and an SDRAM interface is connected with an SDRAM chip; the processor chip carries out Ethernet data communication with an Ethernet E1 bridge chip through an MII interface; the data transmitted by the RS-485 interface chip and the CODEC chip are packaged and processed by the processor chip, converted into Ethernet data and transmitted to the Ethernet E1 bridge chip, the Ethernet data transmitted by the Ethernet E1 bridge chip is subjected to subpackage processing, the instruction data is transmitted to the RS-485 interface chip, and the digital audio data is transmitted to the CODEC chip; the Ethernet E1 bridge chip converts the Ethernet data transmitted by the processor chip into E1 data and transmits the E1 data to the sending drive chip, and converts the E1 data transmitted by the receiving drive chip into Ethernet data and transmits the Ethernet data to the processor chip; and the data transceiving and buffering of the Ethernet E1 bridge chip are carried out through the SDRAM chip.

The network transformer 1-2CT interface is connected with a sending driving chip OUTPUT interface, the 1-1CT interface is connected with an external E1 transmission line INPUT interface, the 2-1CT interface is connected with a receiving driving chip INPUT interface, and the 2-2CT interface is connected with an external E1 transmission line OUTPUT interface; enhancing the driving capability of the E1 sending data signal through a sending driving chip; enhancing the driving capability of receiving the E1 data signal through the receiving driving chip; the E1 data transmitted and received are subjected to transmission isolation protection and signal enhancement through a network transformer.

The remote transmission equipment at the station radio station end converts an analog audio signal output by the station radio station into digital audio data, the digital audio data and instruction data sent by the station radio station are packaged and processed on a processor chip, the digital audio data and the instruction data are converted into Ethernet data and then transmitted to an Ethernet E1 bridge chip, the Ethernet data are converted into E1 data and then transmitted to an E1 transmission line, the E1 transmission line is transmitted to the remote transmission equipment at the control box end, meanwhile, the E1 data received through the E1 transmission line are converted into the Ethernet data on an Ethernet E1 bridge chip and then transmitted to the processor chip for subpackage processing, the instruction data are transmitted to a station radio station data interface, the digital audio data are transmitted to a CODEC chip and converted into analog audio signals and then transmitted to a station radio station audio input pin; the control box end remote transmission equipment converts an analog audio signal output by the control box into digital audio data, performs packet processing on the digital audio data and instruction data sent by the control box in a processor chip, converts the digital audio data into Ethernet data and then transmits the Ethernet data to an Ethernet E1 bridge chip, converts the Ethernet data into E1 data and sends the E1 data to an E1 transmission line, transmits the E1 transmission line to station end remote transmission equipment, converts E1 data received through an E1 line into Ethernet data in an Ethernet E1 bridge chip and then transmits the Ethernet data to the processor chip for subpackage processing, transmits the instruction data to a control box data interface, transmits the digital audio data to a CODEC chip, converts the digital audio data into an analog audio signal and then transmits the analog audio signal to a control box audio input pin; the remote transmission of data and voice communication between the railway station radio station and the control box is realized through an E1 transmission line.

Claims

1. The utility model provides a station radio station control box teletransmission equipment based on E1 which characterized in that: the device comprises a switching power supply chip with the model of LM22670, an LDO power supply chip with the model of LP5907MFX-1.8, an RS-485 interface chip with the model of SN65HVD75, a CODEC chip with the model of TLV320AIC3106C, a processor chip with the model of LPC4337, an Ethernet E1 bridge chip with the model of SE0164, an SDRAM chip with the model of MT48LC8M16A2, a sending driving chip with the model of 74LS240, a receiving driving chip with the model of DS34C86 and a network transformer with the model of PT 22-1161; the input end of the switching power supply chip is connected with an external DC12V for power supply, and the output end of the switching power supply chip is connected with the input end of the LDO power supply chip and the power supply input end of the device DC3.3V; the output end of the LDO power chip is connected with the power supply input end of the device DC1.8V; the 485 interface of the RS-485 interface chip is connected with the RS-485 data interface of the station radio station or the control box, and the TTL interface is connected with the UART1 interface of the processor chip; an MIC3L pin of the CODEC chip is connected with an audio output pin of a station radio station or a control box, and an LEFT _ LOP pin is connected with an audio input pin of the station radio station or the control box; the IIC interface and the IIS interface are connected with the processor chip; an MII interface of the Ethernet E1 bridge chip is connected with an MII interface of the processor chip, an SDRAM interface is connected with an SDRAM chip, an E1_ OUT interface is connected with an INPUT interface of the sending driving chip, and an E1_ IN interface is connected with an OUTPUT interface of the receiving driving chip; the network transformer 1-2CT interface is connected with an OUTPUT interface of the sending driving chip, the 1-1CT interface is connected with an external E1 transmission line INPUT interface, the 2-1CT interface is connected with an INPUT interface of the receiving driving chip, and the 2-2CT interface is connected with an external E1 transmission line OUTPUT interface.