CN113163170A - System and method for superposing rail temperature, beam temperature state temperature and video of high-speed railway - Google Patents

System and method for superposing rail temperature, beam temperature state temperature and video of high-speed railway Download PDF

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CN113163170A
CN113163170A CN202110428929.4A CN202110428929A CN113163170A CN 113163170 A CN113163170 A CN 113163170A CN 202110428929 A CN202110428929 A CN 202110428929A CN 113163170 A CN113163170 A CN 113163170A
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video
character
temperature
signal
module
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CN113163170B (en
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刘万里
李港
王琰
蒋金洲
徐玉坡
徐健斌
王诚龙
刘晓丹
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China University of Mining and Technology CUMT
China Academy of Railway Sciences Corp Ltd CARS
Railway Engineering Research Institute of CARS
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China University of Mining and Technology CUMT
China Academy of Railway Sciences Corp Ltd CARS
Railway Engineering Research Institute of CARS
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/18Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/04Synchronising
    • H04N5/06Generation of synchronising signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/222Studio circuitry; Studio devices; Studio equipment
    • H04N5/262Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
    • H04N5/265Mixing

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Closed-Circuit Television Systems (AREA)

Abstract

The invention discloses a system and a method for superposing rail temperature, beam temperature state temperature and video of a high-speed railway, which are suitable for high-speed rails. Firstly, measuring the rail temperature and the beam temperature by using a wireless temperature sensor, and storing temperature information in a character storage module through wireless to finish serial port communication between the character storage module and a video character superposition module; using a monitoring camera, separating a synchronous signal into a line synchronous signal and a field synchronous signal by using a synchronous signal separation circuit, amplifying a video signal by using an amplification buffer circuit, and transmitting a real-time picture to a video character superposition module; and the video character superposition module is used for finishing superposition of the character video, superposing the character information controlled by the character storage module with the real-time video, and transmitting the video and the character superposition to the display module for superposition display. The method is based on the superposition of digital signals, has flexible superposition effect, strong programmability and expansibility, and can realize more precise superposition control according to product requirements.

Description

System and method for superposing rail temperature, beam temperature state temperature and video of high-speed railway
Technical Field
The invention relates to a system and a method for superposing state temperature and video, in particular to a system and a method for superposing the state temperature and the video of high-speed railway rail temperature and beam temperature on a high-speed railway.
Background
The Chinese high-speed rail is an important component of the transportation industry of China, plays a very important role in promoting the development of Chinese industrialization and urbanization, and represents the advanced technological level of China.
The high-speed railway requires that the line has the characteristics of high smoothness, high precision, less maintenance, small residual change and the like, and the temperature function is one of main factors influencing the high smoothness and the stability of a box girder-track system of the high-speed railway. The infrastructure temperature is an important factor for determining the stability of a seamless line, the high-speed rail real-time video data and the infrastructure temperature parameters which are rapidly driven are subjected to image superposition and real-time display, a more convenient and effective equipment monitoring means can be provided for an operation maintenance unit, and the method has practical application significance. Therefore, a method for overlaying the rail temperature, the beam temperature state temperature and the video of the high-speed railway is needed.
In a novel video anti-counterfeiting circuit board disclosed in patent CN201657208U, video signals are not amplified and buffered, the video signals are interfered by external environment, and there is a large impedance to cause the video signals to be unstable, so that it is difficult to form stable superimposed video character signals, and on the other hand, the superimposed video character signals have two transmission directions, which greatly affects the transmission efficiency and security; in an unmanned aerial vehicle video overlay system of patent CN110445995A, a software overlay system is mainly adopted, and a character library of a video character overlay module can only recognize ASCII codes generally, the patent does not convert character information to be converted into ASCII code values, on the other hand, software overlay is used, although space is saved, the requirement on the running speed of a host computer is higher, once an error occurs in the running of a program, the error is difficult to find, and the repair process affects the running safety of a train, which is far less than the safety and adaptability of the combination of a hardware system and the program.
Disclosure of Invention
Aiming at the defects of the technology, the system and the method for superposing the rail temperature, the beam temperature state temperature and the video of the high-speed railway are provided, wherein the system and the method are stable in transmission signal, high in transmission efficiency, high in reliability and high in adaptability.
In order to achieve the technical purpose, the high-speed railway rail temperature and beam temperature state temperature and video superposition system comprises a real-time monitoring camera for high-speed rail running, a video amplification buffer circuit, a beam temperature sensor, a rail temperature sensor, a wireless receiving host, a switching signal generator, a synchronous signal separation circuit, a character storage module, a video character superposition module and a display module; the real-time monitoring camera for the running of the high-speed rail is arranged on a head of the high-speed rail and used for collecting position information of a fixed body of the high-speed rail. The video signal of the real-time monitoring camera running on the high-speed rail is connected with the receiving end of the video character superposition module through the video amplification buffer circuit, one path of analog video signal of the real-time monitoring video of the real-time monitoring camera running on the high-speed rail is separated into a field synchronizing signal and a line synchronizing signal through the synchronizing signal separation circuit, wherein the line synchronizing signal is directly connected with the receiving end of the video character superposition module, and the field synchronizing signal is connected with the receiving end of the video character superposition module through the switching signal generator; the wireless receiving host is connected with the video character superposition module through the character storage module, the beam temperature sensor is arranged at the head of the train and is only arranged at one position, the rail temperature sensor is arranged on a plurality of rail beams through which a high-speed train passes, the beam temperature sensor and the rail temperature sensor are respectively connected with the wireless receiving host through wireless signals and send beam temperature signals and rail temperature signals to the video character superposition module through the wireless signals, and the video character superposition module superposes the beam temperature signals and the rail temperature signals in videos of a real-time monitoring camera for high-speed train running in a character mode and outputs the videos to the display module for display; a real-time monitoring video of a real-time monitoring camera running on a high-speed rail is separated into a field synchronization signal and a line synchronization signal through a synchronization signal separation circuit, the field synchronization signal determines the start of a field, and the line synchronization signal determines the start of a line.
A superposition method of a superposition system of rail temperature, beam temperature state temperature and video of a high-speed railway using rights comprises the following steps: the rail temperature sensor is arranged at the head of a train and is only arranged at one position, the rail temperature sensor is arranged on a plurality of rail beams which must pass by a high-speed rail train, the wireless receiving host receives temperature data information sent by the beam temperature sensor and the rail temperature sensor and transmits the temperature data information to the word stock storage module for storage, then the data in the word stock storage module is sent to the video character superposition module to be superposed with image data synchronous with the temperature data, and simultaneously the image data is matched with the video information to update temperature characters, and the character storage module and the video character superposition module are communicated through serial ports; the method comprises the steps that a video synchronous signal separation circuit is used for separating a synchronous signal into a horizontal synchronous signal and a vertical synchronous signal, a switching signal generator is used for detecting the vertical synchronous signal, so that whether the amplified video signal sent by a real-time monitoring camera for running iron to a video character superposition module through a video amplification buffer circuit is normally transmitted or not is judged, and finally the video character superposition module superposes data synchronously sent by a character storage module and the video signal and outputs the superposed video to a display module;
the method comprises the following specific steps:
firstly, respectively measuring the rail temperature and the temperature of the beam temperature in real time by using a beam temperature sensor and a rail temperature sensor, and transmitting temperature data to a wireless receiving host connected with a video character superposition module through a wireless signal;
b, utilizing a real-time monitoring camera running on the high-speed rail to monitor the environment in front of the vehicle head at the position where the high-speed rail arrives during running in real time;
c, the wireless receiving host transmits the received temperature data to a word stock storage module;
d, the word stock storage module receives and stores the temperature data, and under the control of logo word stock editing and generating software under the control of a Font Creator Program, characters of the pre-burning chip are screened and filled into a storage chip of the character storage module;
e, converting the screened characters into ASCII codes by the character library storage module and then sending the ASCII codes to the video character superposition module, and converting the received ASCII codes into characters by the character library of the video character superposition module;
step f, a synchronous signal separation circuit separates the analog signal synchronous signal from the real-time monitoring video of the real-time monitoring camera into a line synchronous signal and a field synchronous signal, wherein the line synchronous signal determines the start of one line of the analog signal of the real-time monitoring camera, and the field synchronous signal determines the start of one field of the analog signal of the real-time monitoring camera;
g, directly transmitting a line synchronization signal to a video character superposition module, transmitting a field synchronization signal to the video character superposition module through a switch signal generator, if a real-time monitoring camera running on a high-speed rail is cut off, a video signal synchronization separation circuit cannot detect the video field synchronization signal, transmitting an abnormal signal to the video character superposition module by the video signal synchronization separation circuit, stopping superposition work of characters and videos, and simultaneously sending alarm information until the system starts to continue to work normally after the abnormality is processed;
and h, simultaneously, the video signal passes through an amplification buffer circuit and is used for an amplifier with impedance matching between the input and output of the front and rear stages of the signal, so that the impedance matching effect is achieved, the signal distortion is reduced, and the anti-interference effect is realized. The video signal is transmitted to a video character superposition module;
and i, superposing the temperature characters and the video information processed by the video amplification buffer circuit in real time in a video character superposition module in the video character superposition module, and finally inputting the video superposed with the temperature characters into a display module for display.
The word stock storage module is an MD27C512 chip, receives and stores temperature data, screens and fills characters of the pre-burning chip under the control of word stock editing and generating software, and converts character information into ASCII code values.
The types of the beam temperature sensor and the rail temperature sensor are SD123T20 temperature and humidity intelligent wireless sensors, and the rail temperature sensor fixed at the head of the train and the beam temperature sensors fixed on the rail beams at all positions are matched with FSK433MHZ wireless transmission to transmit temperature information to a wireless receiving host computer which is moved to the rail at the position or the rail beam.
The wireless receiving host computer is a DTS500 host computer, is arranged on a fast moving high-speed rail, receives temperature information from a wireless temperature sensor, is connected with the word stock storage module, and transmits the temperature information to the word stock storage module in a wired mode.
The synchronous signal separation circuit adopts an intelligent video separation chip with the model number of LM1881N, and the synchronous signal is separated into a line synchronous signal and a field synchronous signal by the video synchronous signal separation circuit, wherein the line synchronous signal determines the start of a line, and the field synchronous determines the start of a field.
The video amplification buffer circuit adopts a chip with the model number of AD812AN and is used for an amplifier with matched input and output impedances at the front and rear stages of signals, so that the effect of impedance matching is achieved, the signal distortion is reduced, and the anti-interference performance is realized.
The switching signal generator is used for detecting whether the video signals are normally transmitted or not, once the real-time monitoring camera is cut off, the video signal synchronous separation circuit cannot detect video field synchronous signals, the signals are transmitted to the video superposition module, superposition of characters and videos is stopped, meanwhile, alarm information is sent out, and normal work is continued after abnormity is processed.
Because the character library of the video character superposition module can only identify ASCII codes, the character information to be converted is required to be converted into ASCII code values, and serial port communication between the character storage module and the video character superposition module is completed through Visual Basi language.
The word stock storage module controls the display of characters according to the temperature data received by the wireless receiving host, and performs real-time superposition of images and characters on the video character superposition module together with the processed video signal, the line synchronization signal and the field synchronization signal, wherein the main superposition program of the video character superposition module judges that the flag1 is 1? A SEN indicator lamp is on and indicates whether data are received from a wireless receiver or not, a timer is used for carrying out 10ms interruption, whether a character storage module has a receiving event or not is inquired in the timer interruption, if the data are received, a receiving flag1 is 1, a RUN lamp is on, the received data are recorded, and characters to be superposed are displayed; then, if the character superimposition is successful, flag is 1 and the RUN indicator is normally on, otherwise, flag1 is 0? When the superposition of the characters and the video fails, the RUN indicator light is not on; and finally, the superposed signals are transmitted to a display module to assist high-speed rail workers to better manage the safe driving of the high-speed rail.
Has the advantages that: the method comprises the following steps of measuring beam temperature and rail temperature on the high-speed railway by using a wireless temperature sensor, and monitoring the high-speed railway environment in real time by using a monitoring camera; the method has the advantages that the temperature signal of the host is received wirelessly, the temperature signal is input into the word stock storage module, character information to be converted is converted into ASCII code values, because the character stock of the video character superposition module can only recognize ASCII codes, different commands are packaged into sub-functions with parameters by the serial port communication between the character storage module and the character storage module, the repeated amount of codes is greatly reduced by calling the sub-functions, and the compiling difficulty is reduced; a separation circuit is used for separating one path of analog video signals into field synchronizing signals and line synchronizing signals to control the start and the interruption of commands, and meanwhile, one path of analog video signals passes through a video signal amplification buffer circuit to obtain stable video signals; and superposing the processed video signal and the character representing the temperature change by using a video character superposition module to obtain a video character superposition signal, and transmitting the video character superposition signal to a display module. The analog video signal transmitted by the camera reduces the distortion and the impedance of the video signal through the video amplification buffer circuit, improves the transmission efficiency, and ensures the reliability and the high adaptability of the method.
The invention adopts the implementation mode of hardware character superposition, has low requirement on the hardware of the whole system, simple network wiring, simple and convenient installation, low cost, high processing speed, high reliability, convenient use, easy management and convenient modification of display content and control setting; on a fast-running train, the implementation price is low, the effect is good, the requirements of use occasions are loose, and one circuit board is used in one passage without mutual influence.
Drawings
FIG. 1 is a flow chart of a method for overlaying rail temperature, beam temperature state temperature and video of a high-speed railway.
FIG. 2 is a flowchart of a character superimposition module program according to the present invention.
FIG. 3 is a block diagram of the rail temperature, beam temperature status temperature and video overlay system of the high-speed railway of the present invention.
In the figure: 1-a real-time monitoring camera; 2-a video amplification buffer circuit; 3-a beam temperature sensor; 4-a rail temperature sensor; 5-wireless receiving host; 6-a switching signal generator; 7-a synchronization signal separation circuit; 8-a character storage module; 9-video character superposition module; 10-display module.
Detailed Description
Embodiments of the invention are further described below with reference to the accompanying drawings:
as shown in fig. 3, the system for superimposing rail temperature, beam temperature state temperature and video of a high-speed railway of the invention comprises a real-time monitoring camera 1 for high-speed rail running, a video amplification buffer circuit 2, a beam temperature sensor 3, a rail temperature sensor 4, a wireless receiving host 5, a switching signal generator 6, a synchronous signal separation circuit 7, a character storage module 8, a video character superimposing module 9 and a display module 10; the real-time monitoring camera 1 for running of the high-speed rail is arranged on a head of the high-speed rail and used for collecting position information of a fixed body of the high-speed rail. The video signal of the real-time monitoring camera 1 running on a high-speed rail is connected with the receiving end of a video character superposition module 9 through a video amplification buffer circuit 2, a field synchronizing signal and a line synchronizing signal are separated from one path of analog video signal of real-time monitoring video of the real-time monitoring camera 1 running on the high-speed rail through a synchronizing signal separation circuit 7, wherein the line synchronizing signal is directly connected with the receiving end of the video character superposition module 9, and the field synchronizing signal is connected with the receiving end of the video character superposition module 9 through a switch signal generator 6; the wireless receiving host 5 is connected with a video character superposition module 9 through a character storage module 8, the beam temperature sensor 3 is arranged at the head of a train and is only arranged at one position, the rail temperature sensor 4 is arranged on a plurality of track beams through which a high-speed rail train passes, the beam temperature sensor 3 and the rail temperature sensor 4 are respectively connected with the wireless receiving host 5 through wireless signals and send beam temperature signals and rail temperature signals to the video character superposition module 9 through wireless signals, and the video character superposition module 9 superposes the beam temperature signals and the rail temperature signals in a video of the real-time monitoring camera 1 running on the high-speed rail in a character mode and outputs the superposed video to a display module 10 for display; a real-time monitoring video of a real-time monitoring camera 1 running on a high-speed rail is separated into a field synchronization signal and a line synchronization signal through a synchronization signal separation circuit 7, the field synchronization signal determines the start of a field, and the line synchronization signal determines the start of a line.
The word stock storage module 8 is an MD27C512 chip, the word stock storage module 8 receives and stores temperature data, under the control of word stock editing and generating software, characters of the pre-burning chip are screened and filled, and character information is converted into ASCII code values. The types of the beam temperature sensor 3 and the rail temperature sensor 4 are SD123-T20 temperature and humidity intelligent wireless sensors, and the rail temperature sensor 4 fixed at the train head and the beam temperature sensors 3 fixed on the rail beams at all positions are used for transmitting temperature information to the wireless receiving host 5 moved to the rail or the rail beam at the position conveniently by matching with FSK433MHZ wireless transmission. The wireless receiving host 5 is a DTS500 host, is arranged on a fast moving high-speed rail, receives temperature information from the beam temperature sensor 3 and the rail temperature sensor 4, is connected with the word stock storage module 8, and transmits the temperature information to the word stock storage module in a wired mode. The synchronous signal separation circuit 7 adopts an intelligent video separation chip with the model number LM1881N, and the synchronous signal is separated into a line synchronous signal and a field synchronous signal by the video synchronous signal separation circuit 7, wherein the line synchronous signal determines the start of a line, and the field synchronous determines the start of a field. The video amplification buffer circuit 2 is a chip with the model AD812AN, and is used for an amplifier with impedance matching between input and output of front and rear signal stages, so that the impedance matching effect is achieved, the signal distortion is reduced, and the anti-interference effect is achieved. The switching signal generator 6 is used for detecting whether the video signals are normally transmitted or not, once the real-time monitoring camera 1 is cut off, the video signal synchronous separation circuit cannot detect video field synchronous signals, the signals are transmitted to the video superposition module 9, superposition of characters and videos is stopped, meanwhile, alarm information is sent out, and normal work is continued after abnormity is processed. The character library of the video character superposition module 9 can only recognize ASCII codes, so that character information to be converted needs to be converted into ASCII code values, and serial port communication between the character storage module 8 and the video character superposition module 9 is completed through Visual Basi language.
As shown in fig. 1, a method for overlaying a system for overlaying rail temperature, beam temperature state temperature and video of a high-speed railway comprises the following steps: the rail temperature sensor 3, the rail temperature sensor 4 and the real-time monitoring camera 1 for high-speed rail running are used for respectively monitoring rail temperature and real-time environment change, the rail temperature sensor 3 is arranged at the head of a train and is only arranged at one position, the rail temperature sensor 4 is arranged on a plurality of rail beams which a high-speed rail train must pass through, the wireless receiving host 5 receives temperature data information sent by the rail temperature sensor 3 and the rail temperature sensor 4 and transmits the temperature data information to the word stock storage module 8 for storage, then the data in the word stock storage module 8 is sent to the video character superposition module 9 to be superposed with image data synchronous with the temperature data, the image data is matched with the video information to update temperature characters, and the character storage module 8 and the video character superposition module 9 are communicated through serial ports; the video synchronization signal separation circuit 7 is used for separating the synchronization signal into a horizontal synchronization signal and a vertical synchronization signal, the switching signal generator 6 is used for detecting the vertical synchronization signal so as to judge whether the real-time monitoring camera 1 which runs on the iron sends the amplified video signal to the video character superposition module 9 through the video amplification buffer circuit 2 for normal transmission, and finally the video character superposition module 9 superposes the data synchronously sent by the character storage module 8 and the video signal and outputs the superposed video to the video display module 10;
the method comprises the following specific steps:
step a, firstly, respectively measuring the rail temperature and the temperature of the beam temperature in real time by using a beam temperature sensor 3 and a rail temperature sensor 4, and transmitting temperature data to a wireless receiving host 5 connected with a video character superposition module 9 through wireless signals;
b, utilizing a real-time monitoring camera 1 running on the high-speed rail to monitor the environment in front of the vehicle head at the position where the high-speed rail arrives during running in real time;
step c, the wireless receiving host 5 transmits the received temperature data to the word stock storage module 8;
d, the word stock storage module 8 receives and stores the temperature data, and under the control of logo word stock editing and generating software under the control of a Font Creator Program, the characters of the pre-burning chip are screened and filled into the storage chip of the character storage module 8;
step e, the character library storage module 8 converts the screened characters into ASCII codes and then sends the ASCII codes to the video character superposition module 9, and the character library of the video character superposition module 9 converts the received ASCII codes into characters;
step f, the synchronous signal separation circuit 7 separates the analog signal synchronous signal from the real-time monitoring video of the real-time monitoring camera 1 into a line synchronous signal and a field synchronous signal, wherein the line synchronous signal determines the start of one line of the analog signal of the real-time monitoring camera 1, and the field synchronous signal determines the start of one field of the analog signal of the real-time monitoring camera 1;
step g, line synchronizing signals are directly transmitted to a video character superposition module 9, field synchronizing signals are transmitted to the video character superposition module 9 through a switch signal generator 6, once a real-time monitoring camera 1 running on a high-speed rail is cut off, a video signal synchronization separation circuit 7 cannot detect video field synchronizing signals, the video signal synchronization separation circuit 7 transmits abnormal signals to the video character superposition module 9 and stops superposition work of characters and videos, alarm information is sent out at the same time, and the system does not continue to work normally until the abnormality is processed;
and h, simultaneously, the video signal passes through the amplifying buffer circuit 2 and is used for an amplifier with impedance matching between the input and the output of the front and the rear stages of the signal, so that the impedance matching effect is achieved, the signal distortion is reduced, and the anti-interference effect is realized. The video signal is then transmitted to a video character superposition module 9;
and step i, superposing the temperature characters and the video information processed by the video amplification buffer circuit 2 in the video character superposition module 9 in real time in the video character superposition module 9, and finally inputting the video superposed with the temperature characters into the display module 10 for display.
As shown in fig. 2, the word stock storage module 8 controls the display of characters by using the temperature data received by the wireless receiver 5, and performs real-time superimposition on the video character superimposition module 9 using a C language program together with the processed video signal, the line synchronization signal, and the field synchronization signal, and determines that the flag 1? The SEN indicator lights up to indicate whether data is received from the upper computer, waits for the timer 10ms interrupt to arrive, inquires about a serial port reception event during the timer interrupt, records the received data if the data is received, and displays the characters to be superimposed under the control of the program, with the reception flag1 being 1 and the RUN light on. If the character superimposition is successful, then flag is 1 and the RUN indicator is normally on, otherwise, is flag1 0? And the character and video superposition fails, and the RUN indicator light is not on. And finally, the superposed signals are transmitted to the display module 10 to assist high-speed rail workers to better manage the safe driving of the high-speed rail.

Claims (10)

1. The utility model provides a high-speed railway rail temperature, beam temperature state temperature and video stack system which characterized in that: the system comprises a real-time monitoring camera (1) running on a high-speed rail, a video amplification buffer circuit (2), a beam temperature sensor (3), a rail temperature sensor (4), a wireless receiving host (5), a switching signal generator (6), a synchronous signal separation circuit (7), a character storage module (8), a video character superposition module (9) and a display module (10);
the real-time monitoring camera (1) for running of the high-speed rail is arranged on a head of the high-speed rail and used for collecting position information of a fixed body of the high-speed rail; a video signal of a real-time monitoring camera (1) running on a high-speed rail is connected with a receiving end of a video character superposition module (9) through a video amplification buffer circuit (2), a field synchronizing signal and a line synchronizing signal are separated from one path of analog video signal of real-time monitoring video of the real-time monitoring camera (1) running on the high-speed rail through a synchronizing signal separation circuit (7), wherein the line synchronizing signal is directly connected with the receiving end of the video character superposition module (9), and the field synchronizing signal is connected with the receiving end of the video character superposition module (9) through a switching signal generator (6); the wireless receiving host (5) is connected with a video character superposition module (9) through a character storage module (8), the beam temperature sensor (3) is arranged at the head of a train and is only arranged at one position, the rail temperature sensors (4) are arranged on a plurality of track beams through which a high-speed rail train passes, the beam temperature sensor (3) and the rail temperature sensors (4) are respectively connected with the wireless receiving host (5) through wireless signals and send beam temperature signals and rail temperature signals to the video character superposition module (9) through the wireless signals, and the video character superposition module (9) superposes the beam temperature signals and the rail temperature signals in a video of a real-time monitoring camera (1) running on the high-speed rail in a character mode and outputs the superposed video to a display module (10) for display; a real-time monitoring video of a real-time monitoring camera (1) running on a high-speed rail is separated into a field synchronization signal and a line synchronization signal through a synchronization signal separation circuit (7), the field synchronization signal determines the start of a field, and the line synchronization signal determines the start of a line.
2. A superimposing method using the high-speed railway rail temperature, beam temperature state temperature and video superimposing system according to claim 1, characterized in that: the rail temperature and real-time environmental change are respectively monitored by using a beam temperature sensor (3), a rail temperature sensor (4) and a real-time monitoring camera (1) running on a high-speed rail, the beam temperature sensor (3) is arranged at the head of a train and is only arranged at one position, the rail temperature sensor (4) is arranged on a plurality of rail beams which a high-speed rail train must pass through, a wireless receiving host (5) receives temperature data information sent by the beam temperature sensor (3) and the rail temperature sensor (4) and transmits the temperature data information to a word stock storage module (8) for storage, then data in the word stock storage module (8) is sent to a video character superposition module (9) to be superposed with image data synchronous with the temperature data, the image data is matched with the video information to update temperature characters, and the character storage module (8) and the video character superposition module (9) are communicated through a serial port; the method comprises the steps that a video synchronous signal separation circuit (7) is used for separating synchronous signals into line synchronous signals and field synchronous signals, a switch signal generator (6) is used for detecting the field synchronous signals so as to judge whether the amplified video signals sent by a real-time monitoring camera (1) running on the iron are normally transmitted or not to a video character superposition module (9) through a video amplification buffer circuit (2), and finally the video character superposition module (9) superposes data synchronously sent by a character storage module (8) and the video signals and outputs the superposed video to a video display module (10);
the method comprises the following specific steps:
step a, firstly, a beam temperature sensor (3) and a rail temperature sensor (4) are utilized to respectively measure the rail temperature and the temperature of the beam temperature in real time, and temperature data are transmitted to a wireless receiving host (5) connected with a video character superposition module (9) through wireless signals;
b, utilizing a real-time monitoring camera (1) running on the high-speed rail to monitor the environment in front of the vehicle head at the position where the high-speed rail arrives during running in real time;
c, the wireless receiving host (5) transmits the received temperature data to a word stock storage module (8);
d, the word stock storage module (8) receives and stores the temperature data, and under the control of logo word stock editing and generating software under the control of a Font Creator Program, characters of the pre-burning chip are screened and filled into a storage chip of the character storage module (8);
step e, the character library storage module (8) converts the screened characters into ASCII codes and then sends the ASCII codes to the video character superposition module (9), and the character library of the video character superposition module (9) converts the received ASCII codes into characters;
step f, a synchronous signal separation circuit (7) separates the analog signal synchronous signal from the real-time monitoring video of the real-time monitoring camera (1) into a line synchronous signal and a field synchronous signal, wherein the line synchronous signal determines the start of one line of the analog signal of the real-time monitoring camera (1), and the field synchronous signal determines the start of one field of the analog signal of the real-time monitoring camera (1);
g, line synchronizing signals are directly transmitted to a video character superposition module (9), field synchronizing signals are transmitted to the video character superposition module (9) through a switch signal generator (6), once a real-time monitoring camera (1) running on a high-speed rail is cut off, a video signal synchronous separation circuit (7) cannot detect video field synchronizing signals, the video signal synchronous separation circuit (7) transmits abnormal signals to the video character superposition module (9) and stops superposition work of characters and videos, alarm information is sent out at the same time, and the system does not continue to work normally until the abnormality is processed;
step h, simultaneously, the video signal passes through an amplification buffer circuit (2) and is used for an amplifier with impedance matching between the input and output of the front and rear stages of the signal, so that the impedance matching effect is achieved, the signal distortion is reduced, and the anti-interference effect is realized; the video signal is transmitted to a video character superposition module (9);
and i, superposing the temperature characters and the video information processed by the video amplification buffer circuit (2) in real time in a video character superposition module (9) in the video character superposition module (9), and finally inputting the video superposed with the temperature characters into a display module (10) for display.
3. The superimposing method according to claim 2, characterized in that: the word stock storage module (8) is an MD27C512 chip, the word stock storage module (8) receives and stores temperature data, under the control of word stock editing and generating software, characters of the pre-burning chip are screened and filled, and character information is converted into ASCII code values.
4. The superimposing method according to claim 2, characterized in that: the types of the beam temperature sensor (3) and the rail temperature sensor (4) are SD123-T20 temperature and humidity intelligent wireless sensors, and the rail temperature sensor (4) fixed at the train head and the beam temperature sensor (3) fixed on each track beam conveniently transmit temperature information to a wireless receiving host (5) moving to the track or the track beam at the position in a stationary mode by matching with FSK433MHZ wireless transmission.
5. The superimposing method according to claim 1, characterized in that: the wireless receiving host (5) is a DTS500 host, is arranged on a fast moving high-speed rail, receives temperature information from the beam temperature sensor (3) and the rail temperature sensor (4), is connected with the word stock storage module (8), and transmits the temperature information to the word stock storage module in a wired mode.
6. The superimposing method according to claim 1, characterized in that: the synchronous signal separation circuit (7) adopts an intelligent video separation chip with the model number of LM1881N, and the synchronous signal is separated into a line synchronous signal and a field synchronous signal by the video synchronous signal separation circuit (7), wherein the line synchronous signal determines the start of a line, and the field synchronous determines the start of a field.
7. The superimposing method according to claim 1, characterized in that: the video amplification buffer circuit (2) is a chip with the model AD812AN, and is used for an amplifier with impedance matching between input and output of front and rear signal stages, so that the impedance matching effect is achieved, the signal distortion is reduced, and the anti-interference effect is achieved.
8. The superimposing method according to claim 1, characterized in that: the switching signal generator (6) is used for detecting whether the video signals are normally transmitted or not, once the real-time monitoring camera (1) is cut off, the video signal synchronous separation circuit cannot detect video field synchronous signals, the signals are transmitted to the video superposition module (9), superposition of characters and videos is stopped, meanwhile, alarm information is sent out, and normal work is continued after abnormity is processed.
9. The superimposing method according to claim 2, characterized in that: the character library of the video character superposition module (9) can only recognize ASCII codes, so that character information to be converted is required to be converted into ASCII code values, and the character storage module (8) and the video character superposition module (9) are communicated through a serial port.
10. The superimposing method according to claim 2, characterized in that: the word stock storage module (8) controls the display of characters according to the temperature data received by the wireless receiving host (5), and performs real-time superposition of images and characters on the video character superposition module (9) together with the processed video signal, the line synchronization signal and the field synchronization signal, wherein the main superposition program of the video character superposition module (9) judges that the flag1 is 1? A SEN indicator lamp is on, which indicates whether data is received from a wireless receiver (7), a timer is used for interrupting for 10ms, whether a character storage module (8) has a receiving event is inquired in the interruption of the timer, if the data is received, a receiving flag1 is 1, a RUN lamp is on, the received data is recorded, and the character to be superposed is displayed; then, if the character superimposition is successful, flag is 1 and the RUN indicator is normally on, otherwise, flag1 is 0? When the superposition of the characters and the video fails, the RUN indicator light is not on; and finally, the superposed signals are transmitted to a display module (10) to assist high-speed rail workers to better manage the safe driving of the high-speed rail.
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