CN111629174A - Overpass protection early warning and remote monitoring system on ordinary speed railway line - Google Patents
Overpass protection early warning and remote monitoring system on ordinary speed railway line Download PDFInfo
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Abstract
The invention discloses a system for protecting, early warning and remotely monitoring overpass on a common speed railway line, which mainly comprises a protection monitoring unit, an 800M alarm module, a main control module and a power supply; the protection monitoring unit and the 800M alarm module are respectively connected and controlled by the main control module; the protection monitoring unit, the 800M alarm module and the main control module are respectively connected and are powered by a power supply. The system can meet the requirements of the engineering department on the on-site safety prevention and control of the ordinary speed overpass, has several functions of safety protection monitoring, overpass panoramic image monitoring, one-key triggering type ordinary speed locomotive wireless alarm, remote communication alarm and the like, can ensure the driving safety of the ordinary speed overpass on the ordinary speed railway and reduce the incidence rate of safety accidents by being widely applied.
Description
Technical Field
The invention belongs to the technical field of railway monitoring and early warning, and particularly relates to a flyover protection early warning and remote monitoring system on a common-speed railway line.
Background
In recent years, with the continuous and deep innovation of the informatization of the railway system, the intelligent detection, communication technology and network technology are widely applied to the daily production and management of the railway system. The railway system is used as an important national transportation department, and the normal operation of national production and life is determined by the daily stable operation of the railway system.
Safety is always the central importance of railway operation development as the permanent and unchangeable theme of railways, and with the advance of the grade crossing change project of the existing line grade crossing, a plurality of railway and highway grade crossings are gradually replaced by overpasses, and the safety protection of the overpasses is closely related to the daily safe and normal operation of the existing lines. At present, the overpass on the high-speed railway line of China realizes monitoring protection through a foreign matter invasion limit monitoring subsystem in a special line disaster prevention system of the high-speed railway, a foreign matter invasion limit control box consisting of a monitoring protection net (embedded with a double-electric network sensor), a trackside controller, an installation accessory, a transmission cable and the like is installed on the outer side of the line (fixed on a concrete foundation) or a contact network strut, once the foreign matter invasion limit equipment sends an alarm, information is automatically transmitted to a train control system, and a parking signal is sent out at the same time. The set system effectively realizes the monitoring of the foreign matter invasion limit of the high-speed railway, but belongs to a part of a high-speed railway disaster prevention system, aims at the special line protection of the high-speed railway, has high cost, alarms the train through a train control system of the high-speed railway, and is different from the current common-speed railway running system.
In recent years, accidents happen to the overpass on the existing-speed railway at intervals to influence the driving, so that a set of safety management methods for monitoring and protecting the overpass on the existing-speed railway are established, and the problem of reducing the loss of the overpass caused by the accidents happen to the overpass to the driving of the existing-speed railway becomes a subject in front of railway researchers.
Disclosure of Invention
The invention aims to provide a system for protecting, early warning and remotely monitoring overpasses on a general-speed railway line.
In order to solve the technical problems, the invention adopts the following technical scheme:
the system for protecting, early warning and remotely monitoring the overpass on the ordinary speed railway line mainly comprises a protection monitoring unit, a 800M alarm module, a main control module and a power supply; the protection monitoring unit and the 800M alarm module are respectively connected and controlled by the main control module; the protection monitoring unit, the 800M alarm module and the main control module are respectively connected and are powered by a power supply.
The protection monitoring unit comprises an alarm detection module and a field image acquisition device; the alarm detection module mainly comprises a main controller and an analog-to-digital conversion unit, and is powered by a system power supply, the main controller is respectively connected with the analog-to-digital conversion unit, a 485 bus, an EEPROM (electrically erasable programmable read-only memory) and serial port debugging/communication, and the analog-to-digital conversion unit is connected with DC-DC conversion; the field image acquisition device mainly comprises a high-definition night vision camera and an image acquisition module which are connected with each other, wherein the image acquisition module is connected with a main control module, and the image acquisition module is connected with a 4G antenna through a 4G network remote transmission module; the high-definition night vision camera is a DS-2CD3T47EWD-L type high-definition day and night full-color camera with Haokangwei vision, the image acquisition module is an QZG-SKQ image acquisition module, and a main control chip of the high-definition night vision camera is STM32F103C 8.
The analog-to-digital conversion unit comprises a signal switching unit and a lightning protection unit/ESD, a signal processing unit and a sensor loop detection unit which are connected with the signal switching unit, wherein the lightning protection unit/ESD is connected with a sensor.
The 800M alarm module mainly comprises a host and an antenna feeder system; the main machine mainly comprises a main controller unit, wherein the main controller unit is respectively connected with a communication unit, a radio station power supply control unit, a direct current power supply conversion unit, a storage unit, an indicator light unit, a voice unit and an external signal interface unit; the communication unit comprises an FFSK coding and decoding module and an 800M radio station, the FFSK coding and decoding module is connected with the main controller unit, and the 800M radio station is connected with the antenna feeder system; the voice unit and the external signal interface unit are respectively connected with an external loudspeaker and external control equipment; the FFSK coding and decoding module adopts a CMX469 chip.
The main control module is in communication connection with the protection monitoring unit and the 800M alarm module through RS485 buses respectively, and the main control module is connected with the display screen; the core chip of the main control module is STM32F103 RC.
The 4G network remote transmission module comprises a GPRS wireless transmission module and a main control chip, wherein the GPRS wireless transmission module is an industrial module SIM900A, and the main control chip is STM32F103C 8; the STM32F103C8 is connected with a high-definition night vision camera through a network interface.
The power supply is mainly composed of a solar panel, a solar controller and a lithium battery pack which are connected with one another, the solar panel is a 2-piece single crystal solar panel with the power of 100W, and the capacity of the lithium battery pack is 80A/h and the output voltage is 12V.
The method for carrying out the overpass protection early warning and remote monitoring on the ordinary speed railway line by using the system comprises the steps that a protection monitoring unit carries out real-time monitoring on the overpass protection and the railway line in the overpass coverage range, and whether accidents influencing driving safety occur is judged by detecting the state of a sensor arranged on a protective net of the overpass and observing a railway line video image covered by the overpass; the main control module is responsible for receiving information of each unit such as the protection monitoring unit, the 800M alarm module and the like, issuing a control command to each unit and monitoring the running state of each unit; the 800M train wireless alarm unit is controlled by the master control module and is used for transmitting 800M wireless signals to wirelessly alarm nearby running locomotives; the 4G network remote transmission module is controlled by the main control module and is responsible for giving a safety alarm to a line maintenance manager; the power supply supplies power to the protection monitoring unit, the 800M alarm module, the main control module and other units.
Aiming at the problem that the frequent occurrence of overpass safety accidents on the conventional ordinary speed railway is lack of effective monitoring, the inventor designs and manufactures an overpass protection early warning and remote monitoring system on the ordinary speed railway line by combining advanced electronic, communication and computer technologies, and the system mainly comprises a protection monitoring unit, an 800M alarm module, a main control module and a power supply; the protection monitoring unit and the 800M alarm module are respectively connected and controlled by the main control module; the protection monitoring unit, the 800M alarm module and the main control module are respectively connected and are powered by a power supply. The system can meet the requirements of the engineering department on the on-site safety prevention and control of the ordinary speed overpass, has several functions of safety protection monitoring, overpass panoramic image monitoring, one-key triggering type ordinary speed locomotive wireless alarm, remote communication alarm and the like, can ensure the driving safety of the ordinary speed overpass on the ordinary speed railway and reduce the incidence rate of safety accidents by being widely applied.
Compared with the prior art, the invention has the outstanding advantages that:
(1) the method can effectively monitor the line of the overpass road section, and can monitor the occurrence of accidents affecting the driving safety.
(2) When an accident is monitored, the locomotive can be early warned in the first time.
(3) The remote early warning can be carried out on line management personnel through a communication means.
(4) Can provide a power supply for maintaining the stable operation of the whole system.
(5) The system has a self-checking function and can detect which part of the system is failed.
Drawings
Fig. 1 is a block diagram of the structure of the overpass protection early warning and remote monitoring system on the ordinary speed railway line.
Fig. 2 is a block diagram of a 800M alarm module according to the present invention.
Fig. 3 is a circuit diagram of the FFSK codec module in fig. 2.
Fig. 4 is a flow chart of a transmission/reception control routine of the CMX469 chip of the FFSK codec module of fig. 2.
Fig. 5 is a transmission timing diagram of the CMX469 chip of the FFSK codec module of fig. 2.
FIG. 6 is a timing diagram of the reception of the CMX469 chip of the FFSK codec module of FIG. 2.
FIG. 7 is a circuit diagram of a core chip of the main control module of the present invention.
Fig. 8 is a circuit diagram of a main control chip of the 4G network remote transmission module according to the present invention.
Fig. 9 is a circuit diagram of a GPRS wireless transmission module of the 4G network remote transmission module of the present invention.
Fig. 10 is a flowchart of an image acquisition procedure of the image acquisition module of the present invention.
FIG. 11 is a block diagram of the alarm detection module of the present invention.
Detailed Description
First, system design principle
As driving safety auxiliary equipment, the overpass protection early warning and remote monitoring system on the ordinary speed railway line should use reasonable prevention as the premise, use reliable monitoring as the means, use the alarm in time, prevent the design idea of endangering driving safety as the goal, and determine the system design principle at the same time: no missing report, low investment and easy construction. Accordingly, the system architecture is designed as shown in FIG. 1.
The system for protecting, early warning and remotely monitoring the overpass on the ordinary speed railway line mainly comprises a protection monitoring unit, a 800M alarm module, a main control module and a power supply; the protection monitoring unit and the 800M alarm module are respectively connected and controlled by the main control module; the protection monitoring unit, the 800M alarm module and the main control module are respectively connected and are powered by a power supply.
Second, unit structure function
The protection monitoring unit comprises an alarm detection module and a field image acquisition device. Wherein,
the alarm detection module is a small subsystem for detecting whether the existing fixed protection (such as cement protection barriers, protective nets and the like) facilities on two sides of the overpass on the railway are damaged by external force, and mainly comprises a main controller and an analog-to-digital conversion unit, wherein the main controller is powered by a system power supply, the main controller is respectively connected with the analog-to-digital conversion unit, a 485 bus, an EEPROM (electrically erasable programmable read-only memory) and serial port debugging/communication, and the analog-to-digital conversion unit is connected with DC-DC (direct current-direct current); the analog-to-digital conversion unit comprises a signal switching unit and a lightning protection unit/ESD, a signal processing unit and a sensor loop detection unit which are connected with the signal switching unit, wherein the lightning protection unit/ESD is connected with a sensor; the detection sensors are installed and distributed on the existing protection of the overpass on site; the detection cable is used for connecting each detection sensor; the signal generating circuit sends out a detection signal passing through the detection sensor and the detection cable; the signal detection circuit is used for verifying whether the detection signal is distorted.
The field image acquisition device mainly comprises a high-definition night vision camera and an image acquisition module which are connected with each other, wherein the high-definition night vision camera is used for intercepting images, and the image acquisition module is used for processing and transmitting the images. The image acquisition module is connected with the main control module and is connected with the 4G antenna through the 4G network remote transmission module; according to the field requirement, the high-definition night vision camera selects a DS-2CD3T47EWD-L type high-definition day and night full-color camera for Haokawav vision, the number of pixels of the camera can reach 400 ten thousand, and the field monitoring requirement is completely met; the image acquisition module is an QZG-SKQ image acquisition module, mainly comprises a singlechip main control chip and peripheral circuits thereof, and is used for controlling the camera to take pictures and make video and selecting pictures taken by the camera for remote transmission.
The 800M alarm module is mainly used for transmitting alarm information to the surrounding in a broadcasting mode in an 800M wireless frequency band special for a railway when the system detects that the overhead interchange has a safety accident to influence the driving, so that the driving train can receive the alarm information and take emergency measures. The 800M alarm module mainly comprises a host and an antenna feeder system; the main machine mainly comprises a main controller unit, wherein the main controller unit is respectively connected with a communication unit, a radio station power supply control unit, a direct current power supply conversion unit, a storage unit, an indicator light unit, a voice unit and an external signal interface unit; the communication unit comprises an FFSK coding and decoding module and an 800M radio station, the FFSK coding and decoding module is connected with the main controller unit, and the 800M radio station is connected with the antenna feeder system; under the environment of needing voice prompt or 220V power supply, the voice unit and the external signal interface unit are respectively connected with an external loudspeaker and an external control device in a matching mode; the FFSK coding and decoding module adopts a CMX469 chip which has the characteristics of small size, low power consumption and the like, and mainly achieves the functions of decoding equipment detection information sent by an 800M detector and coding alarm information sent to a simulation radio station. The design of the interface circuit of the CMX469 chip and the singlechip is mainly divided into two parts: a transmit interface circuit design and a receive interface circuit design. The transmission interface circuit is composed of a transmission enable (TX _ EN), a transmission clock line (TX _ SY), and a transmission data line (TX _ DA). The FFSK data output line (TX _ SIG) at this time is used to output a modulated FFSK signal. The receiving interface is composed of four parts, namely a receiving permission (RX _ EN), a receiving clock line (RX _ SYNC), a carrier detection (CA _ DETE) and a clock synchronization receiving DATA line (C _ DATA). At this time, the FFSK data input line RX _ SIG is an input port of the FFSK signal to be demodulated.
The main control module is the core part of the whole system and monitors the running state information of each unit and issues control commands to each unit; besides controlling each unit, the main control module has an important function, namely, working states of each unit are inquired regularly and records are stored, the integral self-checking of the system can be realized, meanwhile, data of faults of each unit can be recorded, and improvement and upgrading of equipment in the future are facilitated. The main control module is in communication connection with the protection monitoring unit and the 800M alarm module through RS485 buses respectively, and the main control module is connected with the display screen; the core chip of the main control module is STM32F103RC, the chip is a 32-bit microcontroller based on ARM core and provided with 512k bytes of flash memory, and the chip is provided with USB, CAN, 11 timers, 3 ADCs and 13 communication interfaces; the highest working frequency can reach 72MHz, and can reach 1.25DMips/MHz when the 0 waiting period of the memory is accessed; the power-saving control circuit works in a temperature range of-40 to +105 ℃, the power supply voltage is 2.0V to 3.6V, and the power-saving mode ensures the requirements of low-power consumption application. Due to the limitation of a field power supply and the field requirement of bus communication and control, the chip can provide enough communication interfaces and meet the low-power-consumption working requirement, and is easier to modularize design and produce.
The 4G network remote transmission module is used for giving a short message alarm to line management personnel when the system detects that the overpass safety accident affects the driving safety, and the system adopts wireless transmission to give a remote alarm due to the field condition limitation and the simplicity of transmitting an alarm signal. Therefore, the 4G network remote transmission module comprises a GPRS wireless transmission module and a main control chip, and the GPRS wireless transmission module can give an alarm to a line manager through a short message of a mobile phone in a 4G wireless environment after the Internet of things card is inserted. The GPRS wireless transmission module selects a high-performance industrial module SIM900A which has rich interfaces and complete functions, is particularly suitable for various fields needing language, short messages and GPRS data services, supports an RS232 serial port and an LVTTL serial port and is provided with hardware flow control; the ultra-wide working range of 5V-24V is supported, and the control of the single chip microcomputer is convenient, so that the functions of voice, short message, GPRS data transmission and the like are provided. Due to the limitation of field conditions and power supply factors, the field can not use an industrial personal computer to directly control a camera to complete operations such as image acquisition and the like, and only a single chip microcomputer can be selected as a main control CPU. Under the condition of comprehensively meeting the field function requirements, the STM32F103C8 single-chip microcomputer is selected as a main control chip and is connected with a network interface between the Haekwover DS-2CD3T47EWD-L type high-definition day-night full-color camera. The system and the main control chip of the main control module belong to a series of ARM single chip microcomputer chips, the performance is stable, the universality is good, the system and the method can be developed under the same software environment, and the development efficiency is improved.
The system is near the overpass on the existing railway, so that no fixed power supply is available; if the power is taken from a through line or nearby farmers, the power supply has huge installation cost and complex construction, and does not conform to the design principle of low investment and easy construction. Therefore, a solar power supply mode is adopted, the power supply is mainly formed by connecting a solar panel, a solar controller and a lithium battery pack, the solar panel is a 2-piece single crystal solar panel with the power of 100W, the capacity of the lithium battery pack is 80A/h, and the output voltage is 12V. Through the test, power supply can guarantee to supply power for whole system steady operation.
The specific sources of the system units are shown in table 1:
TABLE 1 specific sources of System elements
| Serial number | Name (R) | Specification/ |
|
| 1 | High-definition night vision camera | DS-2CD3T47EWD- |
|
| 2 | Image acquisition module | QZG-SKQ |
|
| 3 | Radio station power supply | AO4405 | |
| 4 | DC power supply conversion unit | LM2576- |
|
| 5 | | NV080C | |
| 6 | FFSK coding and decoding | CMX469 chip | |
| 7 | 800M | TK480 | |
| 8 | Main | STM32F103RC | |
| 9 | GPRS wireless transmission module | Industrial |
|
| 10 | Master | STM32F103C8 | |
| 11 | Solar controller | 12V |
|
| 12 | EEPROM | AT24CXX |
Third, working process method
The method for carrying out the overpass protection early warning and remote monitoring on the ordinary speed railway line by using the system comprises the steps that a protection monitoring unit carries out real-time monitoring on the overpass protection and the railway line in the overpass coverage range, and whether accidents influencing driving safety occur is judged by detecting the state of a sensor arranged on a protective net of the overpass and observing a railway line video image covered by the overpass; the main control module is responsible for receiving information of each unit such as the protection monitoring unit, the 800M alarm module and the like, issuing a control command to each unit and monitoring the running state of each unit; the 800M train wireless alarm unit is controlled by the master control module and is used for transmitting 800M wireless signals to wirelessly alarm nearby running locomotives; the 4G network remote transmission module is controlled by the main control module and is responsible for giving a safety alarm to a line maintenance manager; the power supply supplies power to the protection monitoring unit, the 800M alarm module, the main control module and other units. Wherein,
the detection process of the alarm detection module is as follows: the signal generating circuit generates a detection signal, the detection signal passes through a loop formed by the detection sensor and the detection cable and returns to the signal detection circuit, if the signal detected by the signal detection circuit and the sent detection signal have no obvious distortion, the detection ring is considered to be normal, and the detection sensor and the detection cable are both normal, so that the situation that the protection devices on two sides of the overpass are damaged by no external force can be judged, and the overpass is in an accident-free state; if the signal detected by the signal detection circuit is seriously distorted compared with the detection signal or the signal cannot be detected completely, the detection loop formed by the detection sensor and the detection cable is considered to be damaged by external force, and the situation that the protective devices on the two sides of the overpass are damaged by the external force and the overpass has an impact accident is judged, so that the driving safety is influenced.
As shown in fig. 3, when sending an alarm, the CMX469 chip of the FFSK codec module modulates TTL level alarm data signals from the single chip microcomputer into sine wave analog signals, where 1800Hz represents TTL low level and 1200Hz represents high level, and then the sine wave analog signals are modulated by the radio station onto radio frequency carrier signals to be transmitted; when equipment is detected, the unit receives an 800M radio station detection and key detection wireless instruction of the 800M detector, demodulates the instruction into a digital signal and sends the digital signal to the singlechip for analysis.
A flow chart of the transmission/reception control procedure of the CMS469 chip is shown in fig. 4. And the TX _ EN is a transmission enable control port, after low-level transmission is enabled, signals on a TX _ DA data line are sequentially sampled under the synchronization of a clock signal TX _ SY, and modulated FFSK signals can be output at a TX _ SIG pin through modulation. At 1200bps, the system can convert a high level "1" into a 1200Hz sine wave and convert a low level "0" into an 1800Hz sine wave, and output the converted waves through the TX _ SIG port. The TX _ DA pin signal will be sampled at the rising edge of the clock signal TX _ SY, and therefore, the rising edge of TX _ SY must be active and remain stable. When designing a program, data to be transmitted should be serially output in turn at the falling edge of the clock signal. Pulling up TX _ EN will put the transmit circuit into a power saving state, at which time TX _ SY will output a logic high level and TX _ SIG goes into a high impedance state. TX _ EN is pulled up internally to VCC. The transmission timing thereof is shown in fig. 5.
RX _ EN is a receive enable pin. RX _ EN is high, enabling the receiver circuit, and low, enabling the receiver circuit to enter a power saving state. At this time, the RX _ SYNC and the receive data terminals will output a fixed level. When the receiving is enabled, the FFSK signal input to RX _ SIG can be recovered to be serial data output after passing through an internal filter. Meanwhile, a synchronous clock can be recovered from the received data, and the single chip microcomputer synchronously receives the data by sampling the synchronous clock. The reception timing is shown in fig. 6. When designing the program, the DATA at the C _ DATA pin should be sampled at the falling edge of the synchronous clock RX _ SYNC.
In order to realize the photographing control of the high-definition camera and the reading, storage and transmission of image data by the single chip microcomputer, a corresponding program flow is designed as shown in fig. 10.
Fourth, system application example
The overpass protection early warning and remote monitoring system on the ordinary speed railway line is applied to a Qiangugui line K17+900 for field test and use. The field simulation test shows that the system works stably, can meet the requirement of effectively monitoring the overpass and is still used at present.
Claims (8)
1. A protection early warning and remote monitoring system for overpass on a common speed railway line is characterized by mainly comprising a protection monitoring unit, an 800M alarm module, a main control module and a power supply; the protection monitoring unit and the 800M alarm module are respectively connected and controlled by the main control module; the protection monitoring unit, the 800M alarm module and the main control module are respectively connected and powered by a power supply.
2. The system of claim 1, wherein: the protection monitoring unit comprises an alarm detection module and a field image acquisition device; the alarm detection module mainly comprises a main controller and an analog-to-digital conversion unit, and is powered by a system power supply, the main controller is respectively connected with the analog-to-digital conversion unit, a 485 bus, an EEPROM (electrically erasable programmable read-only memory) and serial port debugging/communication, and the analog-to-digital conversion unit is connected with DC-DC conversion; the on-site image acquisition device mainly comprises a high-definition night vision camera and an image acquisition module which are connected with each other, wherein the image acquisition module is connected with a main control module, and the image acquisition module is connected with a 4G antenna through a 4G network remote transmission module; the high-definition night vision camera is a DS-2CD3T47EWD-L type high-definition day and night full-color camera for Haokangwei vision, the image acquisition module is an QZG-SKQ image acquisition module, and a main control chip of the high-definition night vision camera is STM32F103C 8.
3. The system of claim 1, wherein: the analog-to-digital conversion unit comprises a signal switching unit and a lightning protection unit/ESD, a signal processing unit and a sensor loop detection unit which are connected with the signal switching unit, wherein the lightning protection unit/ESD is connected with a sensor.
4. The system of claim 1, wherein: the 800M alarm module mainly comprises a host and an antenna feeder system; the main machine mainly comprises a main controller unit, and the main controller unit is respectively connected with a communication unit, a radio station power supply control unit, a direct current power supply conversion unit, a storage unit, an indicator light unit, a voice unit and an external signal interface unit; the communication unit comprises an FFSK coding and decoding module and an 800M radio station, the FFSK coding and decoding module is connected with the main controller unit, and the 800M radio station is connected with the antenna feeder system; the voice unit and the external signal interface unit are respectively connected with an external loudspeaker and external control equipment; the FFSK coding and decoding module adopts a CMX469 chip.
5. The system of claim 1, wherein: the main control module is in communication connection with the protection monitoring unit and the 800M alarm module through RS485 buses respectively, and the main control module is connected with a display screen; the core chip of the main control module is STM32F103 RC.
6. The system of claim 1, wherein: the 4G network remote transmission module comprises a GPRS wireless transmission module and a main control chip, the GPRS wireless transmission module is an industrial module SIM900A, and the main control chip is STM32F103C 8.
7. The system of claim 1, wherein: the power supply is mainly composed of a solar panel, a solar controller and a lithium battery pack which are connected with each other, the solar panel is a single crystal solar panel with 2 pieces of power of 100W, and the capacity of the lithium battery pack is 80A/h and the output voltage is 12V.
8. The method for performing overpass protection early warning and remote monitoring on the ordinary speed railway line by using the system of claim 1 is characterized by comprising the following steps: the protection monitoring unit monitors the protection of the overpass and the railway line in the overpass coverage range in real time, and judges whether an accident affecting the driving safety occurs or not by detecting the state of a sensor arranged on a protective net of the overpass and observing a video image of the railway line covered by the overpass; the main control unit is responsible for receiving information of each unit such as the protection monitoring unit and the 800M train wireless alarm unit, issuing a control command to each unit and monitoring the running state of each unit; the 800M train wireless alarm unit is controlled by the master control unit and is used for transmitting 800M wireless signals to wirelessly alarm nearby running locomotives; the 4G network remote transmission module is controlled by the main control unit and is responsible for giving a safety alarm to a line maintenance manager; the power supply supplies power to the protection monitoring unit, the 800M train wireless alarm unit, the main control unit and other units.
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| CN202010196734.7A CN111629174A (en) | 2020-03-19 | 2020-03-19 | Overpass protection early warning and remote monitoring system on ordinary speed railway line |
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| CN202010196734.7A CN111629174A (en) | 2020-03-19 | 2020-03-19 | Overpass protection early warning and remote monitoring system on ordinary speed railway line |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116963015A (en) * | 2023-09-20 | 2023-10-27 | 天津七一二移动通信有限公司 | Method for realizing railway safety protection system based on 4G Internet of things |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116963015A (en) * | 2023-09-20 | 2023-10-27 | 天津七一二移动通信有限公司 | Method for realizing railway safety protection system based on 4G Internet of things |
| CN116963015B (en) * | 2023-09-20 | 2024-02-02 | 天津七一二移动通信有限公司 | Method for realizing railway safety protection system based on 4G Internet of things |
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