Dual-mode recording device for railway protection contact

Abstract

The utility model discloses a dual-mode recording device for railway protection contact, which is provided with a recording and storage circuit, a noise reduction circuit, a public network communication circuit, a private network communication circuit and a controller, integrates recording and communication functions at the same time, and does not need to carry an extra recording pen. Through the recording and storage circuit and the noise reduction circuit, the recording quality can be guaranteed, recording data can be stored, through the arrangement of the public network communication circuit and the private network communication circuit, public network communication and private network communication are achieved, two communication modes are provided during talkback, personnel can select the corresponding communication mode based on the actual situation, and the communication efficiency is improved. And the conversation quality of talkback can be ensured.

Description

Technical Field

[0001] This utility model relates to the field of recording, and in particular to a dual-mode recording device for railway protection and communication. Background Technology

[0002] During railway maintenance, all construction and repair work that affects train operation and personal safety must be recorded in its entirety. The railway department will then convert all recorded data into text files and use the results to confirm whether any violations have occurred.

[0003] Currently, during railway maintenance, voice recorders are used for recording. The recordings are then manually copied and transcribed. However, due to the high noise levels at railway sites, the recordings are often unclear. Furthermore, walkie-talkies are used for communication, and typically only one communication mode is available. When the signal is poor, the quality of communication between personnel cannot be guaranteed. Utility Model Content

[0004] This application provides a dual-mode recording device for railway protection communication to solve at least one problem existing in related technologies. The technical solution is as follows:

[0005] In a first aspect, embodiments of this application provide a dual-mode recording device for railway protection communication, comprising:

[0006] Recording and storage circuitry;

[0007] Noise reduction circuit, connected to recording and storage circuit;

[0008] The intercom circuit includes a public network communication circuit and a private network communication circuit. The public network communication circuit is used to realize public network communication, and the private network communication circuit is used to realize private network communication.

[0009] The controller connects the recording and storage circuit, the noise reduction circuit, the public network communication circuit, and the private network communication circuit.

[0010] In one embodiment, the recording and storage circuit includes a microphone, a recording circuit, and a storage circuit, wherein the recording circuit is connected to the microphone circuit and the controller, and the storage circuit is connected to the controller.

[0011] In one embodiment, the storage circuit includes an SD card circuit and a USB flash drive circuit, with the SD card circuit connected to the controller; the USB flash drive circuit includes a USB interface converted from an aviation plug interface, a USB high-speed switch, and a high-speed file management control chip, with the USB interface used for inserting the USB flash drive, and the USB high-speed switch connected to the aviation plug interface, the high-speed file management control chip, and the controller.

[0012] In one embodiment, the noise reduction circuit includes a sound acquisition circuit and a noise reduction chip, wherein the sound acquisition circuit is connected to a microphone and the noise reduction chip, and the noise reduction chip is connected to a controller.

[0013] In one embodiment, the public network communication circuit includes a horn, a communication antenna, and a communication module; the horn is connected to a controller, and the communication module is connected to the communication antenna and the controller.

[0014] In one embodiment, the intercom circuit further includes an antenna unit, which includes an antenna adapter, an antenna interface, and a fiberglass antenna. The antenna adapter connects to the antenna interface and the fiberglass antenna, and the antenna interface connects to the public network communication circuit and the private network communication circuit.

[0015] In one embodiment, the private network communication circuit includes an antenna unit and a private network receiving circuit. The private network receiving circuit includes a signal input circuit, a signal processing circuit, an analog-to-digital conversion circuit, and an audio decoding amplification output circuit. The signal input circuit is connected to the antenna unit and the signal processing circuit. The antenna unit is used to receive private network signals. The analog-to-digital conversion circuit is connected to the signal processing circuit and the controller. The audio decoding amplification output circuit is connected to the controller and the speaker.

[0016] In one embodiment, the signal processing circuit includes a signal amplification circuit, a filtering and mixing circuit, and an oscillation and amplification circuit. The signal amplification circuit is connected to the signal input circuit and the filtering and mixing circuit, and the oscillation and amplification circuit is connected to the filtering and mixing circuit and the analog-to-digital conversion circuit.

[0017] In one embodiment, the private network communication circuit includes a private network transmitting circuit, which includes an audio decoding circuit, a digital-to-analog converter circuit, and an amplification output circuit. The audio decoding circuit is connected to a microphone and a controller, the digital-to-analog converter circuit is connected to the controller and the amplification output circuit, and the amplification output circuit is connected to an antenna unit.

[0018] In one embodiment, the amplification output circuit includes a resonant amplifier circuit and a radio frequency amplifier circuit; the resonant amplifier circuit is connected to the digital-to-analog converter circuit and the radio frequency amplifier circuit, and the radio frequency amplifier circuit is connected to the antenna unit.

[0019] The beneficial effects of the above technical solution include at least the following:

[0020] By incorporating recording and storage circuits, noise reduction circuits, public network communication circuits, private network communication circuits, and a controller, the system integrates recording and communication functions, eliminating the need for a separate voice recorder. The recording and storage circuits and noise reduction circuits ensure recording quality and store recording data. The public network communication circuits and private network communication circuits enable both public and private network communication, providing two communication modes for intercom use. Users can choose the appropriate mode based on the actual situation, which helps ensure call quality.

[0021] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of this application will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0022] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0023] Figure 1 This is a block diagram of a dual-mode recording device for railway protection communication according to an embodiment of this application;

[0024] Figure 2 This is a circuit diagram showing the connection of the display screen in an embodiment of this application;

[0025] Figure 3 This is a circuit diagram showing the connection of the button backlight in an embodiment of this application;

[0026] Figure 4 This is a schematic diagram of the power supply circuit for the backup battery in an embodiment of this application;

[0027] Figure 5 This is a schematic diagram of the first circuit for voltage conversion according to an embodiment of this application;

[0028] Figure 6 This is a schematic diagram of the second circuit for voltage conversion according to an embodiment of this application;

[0029] Figure 7 This is a schematic diagram of the noise reduction circuit in an embodiment of this application;

[0030] Figure 8 This is a schematic diagram of the SD card circuit according to an embodiment of this application;

[0031] Figure 9 This is a circuit diagram of a high-speed switch according to an embodiment of this application;

[0032] Figure 10 This is a circuit diagram of the high-speed file management control chip according to an embodiment of this application;

[0033] Figure 11 This is a schematic diagram of a USB interface adapted from an aviation plug interface according to an embodiment of this application;

[0034] Figure 12 This is a schematic diagram of the signal input circuit according to an embodiment of this application;

[0035] Figure 13 This is a schematic diagram of the signal amplification circuit according to an embodiment of this application;

[0036] Figure 14 This is a schematic diagram of the filtering and mixing circuit in an embodiment of this application;

[0037] Figure 15 This is a schematic diagram of the oscillation and amplification circuit in an embodiment of this application;

[0038] Figure 16 This is a schematic diagram of an analog-to-digital conversion circuit according to an embodiment of this application;

[0039] Figure 17 This is a partial schematic diagram of the audio decoding amplification output circuit according to an embodiment of this application;

[0040] Figure 18 This is another schematic diagram of the audio decoding amplification output circuit according to an embodiment of this application;

[0041] Figure 19 This is a schematic diagram of a digital-to-analog converter circuit according to an embodiment of this application;

[0042] Figure 20 This is a schematic diagram of the resonant amplifier circuit according to an embodiment of this application;

[0043] Figure 21 This is a schematic diagram of the radio frequency amplifier circuit in an embodiment of this application. Detailed Implementation

[0044] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0045] The present invention will be further explained and described below with reference to the accompanying drawings and specific embodiments.

[0046] Reference Figure 1 This application provides a dual-mode recording device for railway protection communication, including a recording and storage circuit, a noise reduction circuit, an intercom circuit, and a controller. The noise reduction circuit is connected to the recording and storage circuit. The intercom circuit includes a public network communication circuit for public network communication, a private network communication circuit for private network communication, and an antenna unit connecting the public network communication circuit and the private network communication circuit. The controller is connected to the recording and storage circuit, the noise reduction circuit, the public network communication circuit, and the private network communication circuit.

[0047] Reference Figure 1 The dual-mode recording device for railway protection communication in this application embodiment also includes a display unit and a power supply unit. The display unit is connected to the controller, and the power supply unit is used to power the recording and storage circuit, the noise reduction circuit, the public network communication circuit, the private network communication circuit, the controller, and the display unit.

[0048] In this embodiment, the controller uses an octa-core ARM processor based on the Qualcomm SM6225 platform with a main frequency of up to 2.4GHz. It runs on the Android 13 operating system, supports LTE Cat 4 networks, and supports multiple network standards such as Wi-Fi and Bluetooth. It also supports multiple input multiple output (MIMO) technology and integrates multiple interfaces such as USB, serial I2C, SPI, and LCM. Other types of controllers can be used in other embodiments, and no specific limitation is made.

[0049] Reference Figure 2 and Figure 3 In this embodiment, the display unit consists of a 3.5-inch LCD color display screen and button backlights, such as... Figure 2 As shown, the controller controls the display screen via the LCM interface; as Figure 3 As shown, the button backlight consists of 12 LEDs, and the controller controls the backlight through I / O pins.

[0050] In this embodiment, the power supply unit can be powered by a combination of external AC power and backup battery. The external power supply uses 220V AC power, which is converted to 13.6V by an adapter. The adapter uses rectification and compression technology to convert the fluctuating voltage into a stable voltage. By adopting a wide voltage design of 100~240V, it integrates overvoltage, overcurrent, overpower, electrostatic discharge, short circuit, and temperature protection functions, effectively filtering out various safety hazards.

[0051] Reference Figure 4 The backup battery's power supply circuit is connected via connector J2001, passes through a filter circuit to the DC-DC converter circuit, and then through the SCT2360 DC-DC converter chip to output 13.6V. It should be noted that the most complex aspect of the power supply unit is that each part requires a different voltage, necessitating multiple conversion steps. Therefore, referring to... Figure 5 and Figure 6 , Figure 5 The 13.6V circuit is converted to different voltages using different DC-DC chips. For example, it can be converted to 9.8V using a TPS643000A. Figure 18 The TPS65262 power management chip enables three-way step-down conversion to supply power to the aforementioned controller, intercom circuit, and other components.

[0052] Reference Figure 7In this embodiment, the noise reduction circuit includes a sound acquisition circuit (the part from the microphone input to the noise reduction chip) and a noise reduction chip U26 (such as the WT3132 noise reduction chip). The sound acquisition circuit is connected to the microphone (MICP_IN, MICN_IN) and the noise reduction chip, and the noise reduction chip is connected to the controller (NR_RX, NR_TX). The noise reduction chip filters the background noise from the microphone during recording through chip-level noise reduction. Sound enters the chip through the microphone, is filtered by the noise reduction chip, and the audio data stored by the storage circuit is the noise-reduced data. The sound emitted through the speaker during playback is also noise-reduced sound. The noise reduction chip communicates with the controller via a serial port.

[0053] It should be noted that when using public network communication circuits and private network communication circuits, the analog signals of private networks are relatively more susceptible to noise interference. In the process of converting analog signals into digital signals, multiple filtering and amplification are required. From the circuit design perspective, noise in the transmission and conversion process of analog signals should be eliminated first, and then the signal enters the noise reduction unit for noise reduction. Only then can the effect be closer to the expectation.

[0054] In this embodiment, the recording and storage circuit is used to record audio and store the recorded data. Optionally, the recording and storage circuit includes a microphone, a recording circuit, and a storage circuit. The recording circuit is connected to the microphone circuit and the controller, and the storage circuit is connected to the controller. The storage circuit includes an SD card circuit and a USB flash drive circuit, respectively providing the functions of storing recorded data on the SD card and storing recorded data on the USB flash drive, storing the recorded data obtained by the controller to the USB flash drive or the SD card. The SD card circuit is connected to the controller, and the USB flash drive circuit includes a USB interface converted from an aviation connector, a high-speed USB switch, and a high-speed file management control chip. The USB interface is used to insert the USB flash drive, and the high-speed USB switch is connected to the aviation connector, the high-speed file management control chip, and the controller.

[0055] Reference Figure 8 SD card circuitry for SD cards ( Figure 8 The J1 pin communicates with the controller via the SDIO interface, which uses nine pins, including a clock line (SD_CLK), a command line (SD_CMD), and data lines (SD_DAT0-SD_DAT3). Optionally, the audio data storage format may include date, clock, device ID, etc.

[0056] Furthermore, using a USB flash drive for storage might be more convenient for railway operations and data collection. The communication interface between the flash drive and the controller is a USB interface, including two data interfaces (DM and DP), and four interfaces (power and ground). Since the controller only has one USB interface, switching is achieved via a high-speed USB switch. This high-speed switch is a low-power, dual SPDT2 port (U17, U18) high-speed analog switch. It optimizes the switching of bidirectional signal streams to high-speed (480Mbps) sources and features high inter-channel noise isolation and low position tilt, allowing for high-speed differential signal transmission with good performance and ensuring signal integrity. Figure 9 . Reference Figure 10 The USB interface is output via a high-speed switch, and then a USB 2.0 high-speed file management control chip (U8), model CH334P, enables fast data reading and writing. Audio data can be quickly stored by inserting a USB flash drive or SD card. POC_USB_DP and POC_USB_DM are connected to pins 13 and 14 of the controller. (Refer to...) Figure 11 The USB interface consists of four interfaces: POC_USB_DP, POC_USB_DM, and 5V power supply. However, considering the need for waterproofing and dustproofing in railway applications, the external interface uses an aviation plug interface. The USB (2.0) interface is converted through the aviation plug interface and implemented by using an adapter extension cable. In this way, one side of the USB interface can be placed on the side of the operator, making it convenient for the operator to insert the USB flash drive into the USB interface when starting work and unplug the USB flash drive when leaving get off work. The USB flash drive can be directly hot-swapped and supports plug-and-play functionality.

[0057] In this embodiment, the public network communication circuit includes a speaker, a communication antenna, and a communication module. The speaker is connected to a controller, and the communication module is connected to both the communication antenna and the controller. The communication module uses an SC200V 4G smart module, integrating 4G communication functionality. This module is based on a cellular network and transmits data packets via IP data transmission using the operator's mobile communication network. It should be noted that public network communication enables Point-of-Care (POC) intercom functionality, integrating real-time voice communication and supporting one-to-many group reception. Through the VoIP (Voice over IP) technology of the wireless communication unit, the voice signal is converted into a digital signal, segmented into individual data packets, and then transmitted via the mobile network. POC intercom solves the distance problem of private network intercom, supporting a longer communication range, higher sound quality, and stronger data transmission capabilities.

[0058] In this embodiment, the intercom circuit further includes an antenna unit, which includes an antenna adapter, an antenna interface, and a fiberglass antenna. The antenna adapter connects to the antenna interface and the fiberglass antenna, and the antenna interface connects to the public network communication circuit and the private network communication circuit.

[0059] Reference Figures 12-18 In this embodiment, the private network communication circuit consists of a private network receiving circuit and a private network transmitting circuit, namely, two channels for data reception and data transmission. Transmission and reception share a single antenna element. The private network receiving circuit includes a signal input circuit (see reference...). Figure 12 ), signal processing circuit, analog-to-digital conversion circuit (refer to) Figure 16 ) and audio decoding amplification output circuit (including audio decoding circuit such as Figure 17 and the amplified output sub-circuit, such as Figure 18 The signal input circuit connects to the antenna unit and the signal processing circuit. The antenna unit receives private network signals. The analog-to-digital converter circuit connects to the signal processing circuit and the controller. The audio decoding and amplification output circuit connects to the controller and the speaker. The signal processing circuit includes a signal amplification circuit (see reference...). Figure 13 ), filtering and mixing circuits (refer to) Figure 14 ), oscillation and amplification circuit (refer to) Figure 15 The signal amplification circuit is connected to the signal input circuit and the filtering and mixing circuit. The oscillation and amplification circuit is connected to the filtering and mixing circuit and the analog-to-digital converter circuit. The signal amplification circuit and the filtering and mixing circuit are connected via... Figure 13 , Figure 14 Connect point a in the diagram.

[0060] Reference Figures 19-21 In this embodiment of the application, the private network transmission circuit includes an audio decoding circuit (such as...). Figure 17 (i.e., shared audio decoding circuit) and digital-to-analog conversion circuit (refer to...) Figure 19 The audio decoding circuit connects to the microphone and controller, the digital-to-analog converter connects to the controller and the amplifier output circuit, and the amplifier output circuit connects to the antenna unit. The amplifier output circuit includes a resonant amplifier circuit (see reference...). Figure 20 ) and RF amplifier circuit (refer to Figure 21 The resonant amplifier circuit is connected to the digital-to-analog converter circuit and the radio frequency amplifier circuit, and the radio frequency amplifier circuit is connected to the antenna unit.

[0061] In this embodiment of the application, the antenna adapter is from... Figure 12 , Figure 21 The W1001 interface output has a UHF female connector as the external interface. The fiberglass antenna is 4 meters long and made of fiberglass material. The radiating element is made of copper, with a gain of 10dB. The external interface is a UHF male connector. A UHF splitter can be used to split the fiberglass antenna interface into two, sending one signal to the railway protection communication dual-mode recording device of this embodiment.

[0062] In the embodiments of this application, such as Figures 12-18On the signal receiving end, the antenna interface W1001 receives private network signals through an external fiberglass antenna, according to the frequency setting. The received data is filtered by the coupling circuit and then enters through the RX interface (e.g., Figure 12 As shown), the signal is amplified by the D6603 high-amplitude amplifier (e.g. Figure 13 As shown), the frequency is mixed by a mixer circuit composed of discrete components such as capacitors and inductors, outputting an intermediate frequency (IF) signal of over 400MHz. This IF signal is then divided by a frequency divider circuit to obtain a frequency of 38.4MHz, which is output through the RX_IF_1 pin (as shown). Figure 14 As shown), the signal is used by the crystal oscillator in the oscillation circuit. After passing through the crystal oscillator, the signal is amplified by a two-stage buffer (Q6402, Q6401) and output from the IF-out pin (as shown). Figure 15 As shown in the diagram, the AD9864 chip converts the analog signal into a digital signal, which is then sent to the controller for processing (e.g., ...). Figure 16 (As shown). The AD9864 converter chip and the controller communicate via SPI (SPI1_CLK, MAX9867_IRQ, SPI1_DO, SPI1_DI) and A / D interfaces (AD9864_MCBSP1_CLKR, AD9864_MCBSP1_FSR, AD9864_MCBSP1_DR). Additionally, the digital signal from the controller is converted into an audio signal by the MAX9867, output via the U10005 public / private network switch, amplified by the TPA3130D2 power amplifier chip, and output to a speaker (e.g.,...). Figure 17 , 18 (As shown).

[0063] In this embodiment of the application, on the transmitting end, the audio data coming in from the microphone is decoded by the MAX9867 decoding chip and then enters the controller (e.g., MAX9867_IRQ, MCASP_DIN) via MAX9867_IRQ, MCASP_DIN. Figure 17 As shown), the digital signal transmitted from the controller is converted into an analog signal by the MS5614 digital-to-analog converter chip and output to the MOD_H pin (as shown). Figure 19 As shown), the signal is transmitted via Q8006 and amplified by BGA2818 RF amplifier. This circuit forms a resonant circuit with discrete components such as capacitors and inductors, and outputs through the Tx_LO pin (as shown). Figure 20 As shown), the signal is then amplified by an ATR2037 ultra-low noise amplifier, and then passed through Q7012 and Q7013 to form a three-stage amplification circuit. Finally, the amplified analog signal is transmitted through the W1001 antenna interface (as shown). Figure 21 (As shown).

[0064] The embodiments of this application have the following advantages:

[0065] 1. The power supply unit uses 220V power supply. Through the adapter, 220V is converted to 13.6V to power each part of the circuit. It integrates a backup battery to prevent the device from working normally in case of accidental power failure.

[0066] 2. In private network communication mode, it can receive intercom data on the same channel; in public network communication mode, it can receive intercom data from all devices within the same group. Furthermore, due to the direct use of a fiberglass antenna, its reception range is farther than that of a typical walkie-talkie, capable of receiving complete intercom data within a 5-kilometer radius. Simultaneously, the recording data in public network communication mode is in absolute time, and for all received intercom data, it is possible to clearly identify which walkie-talkie sent the data (a one-to-one correspondence between walkie-talkies and personnel), and which personnel's voice it is.

[0067] 3. Integrated noise reduction circuit improves recording quality and solves the problem of low sound quality in on-site recordings due to ambient noise;

[0068] 4. Recording data can be collected via USB flash drive or SD card, which is convenient and quick.

[0069] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A dual mode recording device for railway protection liaison, characterized in that, include: Recording and storage circuitry; Noise reduction circuit, connected to recording and storage circuit; The intercom circuit includes a public network communication circuit and a private network communication circuit. The public network communication circuit is used to realize public network communication, and the private network communication circuit is used to realize private network communication. The controller connects the recording and storage circuit, the noise reduction circuit, the public network communication circuit, and the private network communication circuit.

2. The dual mode recording device for railway protection liaison according to claim 1, characterized in that: The recording and storage circuit includes a microphone, a recording circuit, and a storage circuit. The recording circuit is connected to the microphone circuit and the controller, and the storage circuit is connected to the controller.

3. The dual mode recording device for railway protection liaison according to claim 2, characterized in that: The storage circuit includes an SD card circuit and a USB flash drive circuit. The SD card circuit is connected to the controller. The USB flash drive circuit includes a USB interface converted from an aviation plug interface, a USB high-speed switch, and a high-speed file management control chip. The USB interface is used to insert the USB flash drive, and the USB high-speed switch is connected to the aviation plug interface, the high-speed file management control chip, and the controller.

4. The dual mode recording device for railway protection liaison according to claim 2, characterized in that: The noise reduction circuit includes a sound acquisition circuit and a noise reduction chip. The sound acquisition circuit is connected to the microphone and the noise reduction chip, and the noise reduction chip is connected to the controller.

5. The dual mode recording device for railway protection liaison according to claim 2, characterized in that: Public network communication circuits include a speaker, a communication antenna, and a communication module; The speaker is connected to the controller, and the communication module is connected to the communication antenna and the controller.

6. The dual mode recording device for railway protection liaison according to claim 5, characterized in that: The intercom circuit also includes an antenna unit, which includes an antenna adapter, an antenna interface, and a fiberglass antenna. The antenna adapter connects to the antenna interface and the fiberglass antenna, and the antenna interface connects to the public network communication circuit and the private network communication circuit.

7. The dual mode recording device for railway protection liaison according to claim 6, characterized in that: The private network communication circuit includes an antenna unit and a private network receiving circuit. The private network receiving circuit includes a signal input circuit, a signal processing circuit, an analog-to-digital conversion circuit, and an audio decoding and amplification output circuit. The signal input circuit is connected to the antenna unit and the signal processing circuit. The antenna unit is used to receive private network signals. The analog-to-digital conversion circuit is connected to the signal processing circuit and the controller. The audio decoding and amplification output circuit is connected to the controller and the speaker.

8. The dual mode recording device for railway protection liaison according to claim 7, characterized in that: The signal processing circuit includes a signal amplification circuit, a filtering and mixing circuit, and an oscillation and amplification circuit. The signal amplification circuit is connected to the signal input circuit and the filtering and mixing circuit, and the oscillation and amplification circuit is connected to the filtering and mixing circuit and the analog-to-digital conversion circuit.

9. The dual mode recording device for railway protection liaison according to claim 6, characterized in that: Private network communication circuits include private network transmission circuits, which in turn include audio decoding circuits, digital-to-analog conversion circuits, and amplifier output circuits. The audio decoding circuit is connected to the microphone and the controller, the digital-to-analog converter circuit is connected to the controller and the amplifier output circuit, and the amplifier output circuit is connected to the antenna unit.

10. The dual mode recording device for railway protection liaison according to claim 9, characterized in that: The amplification output circuit includes a resonant amplifier circuit and an RF amplifier circuit; the resonant amplifier circuit is connected to the digital-to-analog converter circuit and the RF amplifier circuit, and the RF amplifier circuit is connected to the antenna unit.

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