CN111726563A - Video storage device for train video monitoring system - Google Patents
Video storage device for train video monitoring system Download PDFInfo
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- CN111726563A CN111726563A CN201910207803.7A CN201910207803A CN111726563A CN 111726563 A CN111726563 A CN 111726563A CN 201910207803 A CN201910207803 A CN 201910207803A CN 111726563 A CN111726563 A CN 111726563A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/42—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
- H04N19/423—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation characterised by memory arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
Abstract
The invention discloses a video storage device for a train video monitoring system, which comprises: the first communication module is connected with an Ethernet switch board in the train video monitoring system and used for acquiring video information transmitted in real time in the running process of a train and transmitting the video information to the main control module through a first network interface, wherein the first network interface adopts a gigabit network interface; the main control module is used for receiving the video information through the first network interface, analyzing and coding the video information, and further sending the processed video information to the video storage module through the high-speed data transmission interface; and the video storage module is used for acquiring the video information through the high-speed data transmission interface and storing the video information. The invention improves the usability and maintainability of the storage device, and has the characteristics of low cost, high reliability and large storage capacity.
Description
Technical Field
The invention relates to the field of video monitoring, in particular to a video storage device for a train video monitoring system.
Background
With the increase of vehicle-mounted video data, the audio and video storage device of the train plays an especially important role. The traditional vehicle-mounted video storage device adopts an X86 processor, uses a Windows file system, and adopts 100M Ethernet as a communication interface to input video data. The device is not suitable for the field of high-speed running trains, and cannot meet the requirement of real-time data storage in the running process of the accompanying trains for multiple video channels. Specifically, the power consumption is high, the risk that video data are easily lost after power failure exists, the development and maintenance cost is high, the reliability and safety of the existing locomotive video storage device for stored data are further low, and the defects that the product cost is high, the video data are frequently lost after power failure, the communication speed is low and the like exist.
Disclosure of Invention
In order to solve the above technical problem, the present invention provides a video storage device for a train video monitoring system, comprising: the first communication module is connected with an Ethernet switch board in the train video monitoring system and used for acquiring video information transmitted in real time in the running process of a train and transmitting the video information to the main control module through a first network interface, wherein the first network interface adopts a gigabit network interface; the main control module is used for receiving the video information through the first network interface, analyzing and coding the video information, and further sending the processed video information to a video storage module through a high-speed data transmission interface; the video storage module is used for acquiring the video information through the data high-speed transmission interface and storing the video information.
Preferably, the video storage device includes: the electronic lock is connected with the main control module and used for outputting a hard disk protection signal when the electronic lock is in an open state, and further, the main control module is further used for entering a hard disk protection mode after receiving the hard disk protection signal so as to drive the video storage module to lock the video information which is stored completely.
Preferably, the main control module is further configured to detect the video storage module and initialize the video storage module when the video storage module and the main control module are detected to be in a connected state again when entering the hard disk protection mode.
Preferably, the video storage apparatus further comprises: the memory device reset module is connected with the main control module and used for detecting whether the main control module is restarted or not, and if yes, the power supply of the video memory module is driven to reset.
Preferably, the video storage module is arranged in the protection box, and the protection box adopts a pull-out structure.
Preferably, the video storage apparatus further comprises: the power failure protection module is connected with a power input end of the video storage device and used for providing a standby power supply for the video storage device when an input power supply falls or is in power failure.
Preferably, the main control module adopts an LS1012 processor.
Preferably, the first network interface adopts an SGMII interface.
Preferably, the video storage apparatus further comprises: the second communication module is connected with the main control module through a second network interface and is used for transmitting the video information downloaded online in real time, wherein the second network interface adopts an RGMII interface; and/or the USB communication module is connected with the main control module through a USB interface and is used for transmitting the video information downloaded online, wherein the USB interface adopts a USB3.0 interface.
Preferably, the video storage apparatus further comprises: a logging module, wherein the logging module is configured to store event information and a fault log for the video storage module.
Compared with the prior art, one or more embodiments in the above scheme can have the following advantages or beneficial effects:
the invention provides a video storage device for a train video monitoring system. The device adopts a low-power-consumption microprocessor as a core control device, is provided with two gigabit Ethernet networks and one USB3.0 interface, is convenient for the transmission and the downloading of video data, greatly improves the communication speed, and enables the storage capacity to reach 2TB through a capacity-expandable solid state disk. Meanwhile, an electronic lock, a hard disk reset circuit and a power failure protection circuit are designed, so that the reliability, the safety and the integrity of video information can be ensured. The invention not only improves the usability and maintainability of the storage device, has the characteristics of low cost, high reliability and large storage capacity, but also adopts EMMC as a storage medium for event recording and fault recording, and provides a large amount of data for the subsequent analysis of the operation process of the device.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic installation position diagram of a video storage device for a train video monitoring system according to an embodiment of the present application.
Fig. 2 is a schematic overall structure diagram of a video storage device for a train video monitoring system according to an embodiment of the present application.
Fig. 3 is a schematic structural diagram of a specific example of the main control board 100 in the video storage device for the train video monitoring system according to the embodiment of the present application.
Detailed Description
The following detailed description of the embodiments of the present invention will be provided with reference to the drawings and examples, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented. It should be noted that, as long as there is no conflict, the embodiments and the features of the embodiments of the present invention may be combined with each other, and the technical solutions formed are within the scope of the present invention.
The existing video storage device used in the train video monitoring system mostly adopts an X86 processor, uses a Windows file system, and adopts 100M ethernet as a communication interface for inputting video data. The video data transmission device of the hundred-mega Ethernet is not suitable for the field of high-speed running trains, and cannot meet the requirement of real-time data storage in the running process of the accompanying trains for multiple video channels. Specifically, the transmission speed cannot meet the real-time requirement, the power consumption is high, the risk that video data are easily lost after power failure exists, the development and maintenance cost is high, the reliability and the safety of the existing locomotive video storage device for the stored data are further low, and the defects that the product cost is high, the video data are frequently lost after the power failure, the communication speed is low and the like exist.
Therefore, the invention provides a video storage device for a train video monitoring system, which aims to solve the problems in the prior art. The device utilizes gigabit Ethernet communication mode, can transmit the video data of multichannel camera output simultaneously, and communication speed promotes by a wide margin, has designed hard disk on-line measuring and has fallen the electric time delay function, guarantees that processor system has sufficient time to carry out data protection, has promoted the reliability and the security of data. The invention improves the usability and maintainability of the storage device, and has the characteristics of low cost, high reliability and large storage capacity.
Fig. 1 is a schematic installation position diagram of a video storage device for a train video monitoring system according to an embodiment of the present application. As shown in fig. 1, the train video storage device according to the present invention is suitable for a train video monitoring system of a high-speed running train, and is located between a front panel and a back panel in the train video monitoring system. The train video storage device is connected with the front panel through the front panel connector. The front panel is used for debugging and controlling (issuing control instructions) the train video monitoring system, is used for downloading video information obtained by the back panel and the video storage device in real time on line in the high-speed running process of the train, and is used for displaying the current working state of each module of the video storage device in real time. The back plate is used for acquiring video information collected by all the line channels in real time from a plurality of paths of video monitoring threads in the train video monitoring system.
Fig. 2 is a schematic overall structure diagram of a video storage device for a train video monitoring system according to an embodiment of the present application. As shown in fig. 2, the video storage apparatus includes a main control board 100, a power supply board 200, and a hard disk protection box 300. Wherein, main control panel 100 mainly includes: the main control module 110, the first communication module 120, the second communication module 130, the USB communication module 140, and the logging module 150. The power panel 200 mainly includes: a storage device main power module 210 and a power down protection module 220. The hard disk protection cartridge 300 mainly includes: a video storage module 310, an electronic lock 320, and a storage device reset module 330.
Specifically, the first communication module 120 is connected to an ethernet switch board in a backplane of the train video monitoring system, and performs real-time online communication with the current ethernet switch board. The first communication module 120 is configured to obtain video information for multiple video monitoring threads transmitted in real time during a running process of a train, and transmit the video information to the main control module 110 through a first network interface. Wherein, the first network interface adopts a gigabit network interface. Preferably, the first network interface employs an SGMII interface. In an embodiment of the present invention, the first communication module 120 includes: the ethernet controller, the physical layer PHY chip, and the network transformer are built in the main control module 110. The module 120 utilizes this architecture to complete 1000Mbps full/half duplex SGMII ethernet functionality. Among them, the physical layer PHY chip is preferably RTL 8211.
Then, the main control module 110 is connected to the first communication module 120 through a first network interface. The main control module 110 is configured to receive, through the first network interface, video information transmitted in real time from the first communication module 120, perform parsing, compression, and encoding processing on the video information, and further send the processed video information to the video storage module 310 through the high-speed data transmission interface, so as to store the video information by using a mass storage. The main control module 110 writes the processed video information into the video storage module 310 through the high-speed data transmission interface according to a pre-stored data format and a corresponding read-write program matched with the video storage module 310. Preferably, the data high-speed transmission interface adopts a SATA3.0 interface.
Further, the video storage module 310 is connected to the main control module 110 through the data high-speed transmission interface. The video storage module 310 is used for acquiring the video information in real time through the data high-speed transmission interface and storing the video information. In the embodiment of the present invention, the video storage module 310 stores video data by using an SSD hard disk, and the storage capacity of the SSD hard disk has scalability up to 2TB at most. It should be noted that the present invention does not specifically limit the type of the video storage module 310, and those skilled in the art can select the type according to actual needs.
Therefore, the function of storing the video data in real time is completed in the above mode. Further, in order to facilitate the insertion and extraction operation of the video data stored in the video storage module (hard disk) 310 at any time by the operator, the data dump is facilitated. The video storage module 310 in the embodiment of the present invention is built in the hard disk protection cartridge 300. The hard disk protection box 300 is arranged in a chassis of the train video monitoring system in a pull-out structure and is connected with the chassis in a pull-out manner.
Fig. 3 is a schematic structural diagram of a specific example of the main control board 100 in the video storage device for the train video monitoring system according to the embodiment of the present application. As shown in fig. 2 and 3, in order to ensure the reliability of the video information in the hard disk, the train video storage device is equipped with an electronic lock 320. Meanwhile, in order to ensure accurate diagnosis and positioning of the hard disk fault, the train video storage apparatus is provided with a storage device resetting module 330. The memory device resetting module 330 is connected to the main control module 110 and the video memory module 310 through GPIO interfaces, and is configured to detect an in-place state of the video memory module 310 (hard disk), and determine whether a reset operation needs to be performed on the video memory module 310 (hard disk) according to a detection result. Specifically, the storage device resetting module 330 is configured to detect an in-place status of the video storage module 310 (hard disk), and when the hard disk is not in place, a resetting operation is required to be performed on the hard disk. Further, the storage device resetting module 330 is configured to send a disk hard disk power reset signal to a power supply of the video storage module 310 (hard disk) through the GPIO interface when it is detected that the hard disk is not in place, so as to drive the hard disk to reset itself. The electronic lock 320 and the storage device resetting module 330 are both disposed in the side wall of the hard disk protection box 300. The electronic lock 320 is preferably an electronic hard disk lock 320.
It should be noted that the circuit type used by the memory device reset module 330 is not specifically limited in the present invention, but the circuit type of the memory device reset module 330 in the embodiment of the present invention needs to match the type of the video memory module 310 (hard disk). Since the video storage module 310 in the embodiment of the present invention employs an SSD hard disk, preferably, the storage device resetting module 330 in the embodiment of the present invention is an SSD hard disk resetting module correspondingly.
Further, the electronic lock 320 is connected to the main control module 110 and the video storage module 310, and is configured to output a hard disk protection signal to the main control module 110 when the electronic lock 320 is in an open state. Then, the main control module 110 is further configured to enter a hard disk protection mode after receiving the hard disk protection signal sent from the electronic lock 320, and drive the hard disk to lock the currently stored video information, so as to ensure integrity of the currently stored video information, and the video data in the hard disk cannot be downloaded or transmitted. Further, the transmission or download operation of the video information in the video storage module 310 may not be performed until the main control module 310 performs the locking and unlocking process of the information through the corresponding unlocking software, and the external device may not be used or the connection with the main control module 110 may not be performed again.
It should be noted that, since the application environment of the present invention is based on a real-time train traveling at a high speed, the storage process of the video information is also performed in real time, and thus, in the case of train traveling, the hard disk of the video storage module 310 cannot be plugged or unplugged, that is, the hard disk protection box 300 and/or the electronic lock 320 cannot be opened to ensure data security. Therefore, the reliability of the video information in the running process of the train can be guaranteed by adding the electronic lock 320.
More specifically, the main control module 110 is configured to detect the video storage module 310 and initialize the video storage module 310 if it is detected that the video storage module 310 and the main control module 110 are in a connected state again under the condition that it is determined that the hard disk protection mode is entered. Specifically, when the main control module 110 is in the current hard disk protection mode, if it is detected that the hard disk is in the disconnection state (the hard disk is not in the on-position state) with the main control module 110 first and then is in the connection state (the hard disk is in the on-position state) with the main control module 110 again, the main control module 110 automatically detects the on-position information and the capacity information of the hard disk of the video storage module 110, and performs an initialization operation for retaining the stored video data. Wherein, the automatic detection comprises: the current remaining space and the location thereof of the hard disk of the video storage module 110, the failure detection information of the hard disk of the video storage module 110, and the like are detected. This process ensures the stability and reliability of hard disk identification after hot-plugging.
Further, the storage device reset module 330 is connected to the power supply portions of the main control module 110 and the video storage module 110. The storage device resetting module 330 is configured to detect whether a restart operation occurs in the main control module 110, and if the restart operation occurs, drive the power supply of the video storage module 110 to reset. Specifically, the storage device reset module 330 detects a restart condition of the main control module 110, generates a storage device reset signal after detecting that the main control module 110 is restarted, and sends the storage device reset signal to a reset signal pin in the power supply portion of the video storage module 310 to drive the video storage module 310 to perform a reset operation. Therefore, the situation that the hard disk cannot be found only through the hard disk in-place detection function of the main control module 110 after the main control module 110 is restarted and reset is avoided.
The power supply board 200 will be described with reference to fig. 2 and 3. Specifically, the storage device main power module 210 in the power panel 200 is provided with a power signal for the video storage device as an input of the storage device main power module 210 by a power management module within the train video monitoring system. The storage device main power module 210 is used for providing corresponding working power for each module in the main control board 100 and various devices in the hard disk protection box 300. Further comprising: the video storage device comprises an anti-reverse conducting circuit (not shown) and a switching power supply chip (not shown), wherein under the condition that the power supply condition of the video storage device is normal, the input end of a main power supply module 210 of the storage device is output to the switching power supply chip through the anti-reverse conducting circuit, and corresponding power supply signals with different levels are obtained through power supply conversion processing of the switching power supply chip so as to be output to various modules or equipment in the video storage device and provide corresponding working power supplies for the modules or the equipment.
In addition, the power down protection module 220 is connected to a power input terminal of the video storage device. The power-down protection module 220 is used for providing a standby power supply for the video storage device when the input power supply falls or is powered down. In the actual running process of the train, the unexpected power failure or the power supply voltage amplitude drop of the train video monitoring system sometimes occurs, accordingly, the video storage device also has the unexpected power failure or the power supply voltage amplitude drop, and at this time, the discharging energy of the energy storage capacitor in the power failure protection module 220 is utilized to provide power supply energy for the video storage device to delay the power failure, so that the main control module 110 has sufficient time to perform power failure data protection. The main control module 110 is further configured to detect a power input end of the video storage device, generate a power failure instruction when an unexpected power failure or a drop in power voltage amplitude is detected, drive the main control module 110 to lock and protect video information and various configuration files currently being transmitted in real time by using the standby power energy provided again by the current power failure protection module 220, and execute an operation of stopping reading and writing the current file and closing the file system by software of the main control module 110 when a signal at the power input end is detected to be changed from high to low, so as to ensure integrity of the file system and data and complete power failure data protection processing operations for the main control module 110. It should be noted that the standby power supply is used to provide a working power supply for supporting the main control module 110 to perform power-down data protection on the hard disk of the video storage module 310, and plays a role of delaying power-down, thereby ensuring the integrity of the stored video information.
Referring to fig. 2 and 3 again, the second communication module 130, the USB communication module 140, and the logging module 150 in the main control board 100 will be described.
Specifically, the second communication module 130 is connected to a front panel in the train video monitoring system, and the second communication module 130 is used to realize the online communication between the main control module 110 in the video storage device and the front panel. Specifically, in one aspect, the second communication module 130 can be used to transmit the debugging information sent from the front panel to the main control module 110 for debugging and analysis. Wherein the debug information comprises an online download instruction. In addition, the second communication module 130 can also be used to transmit the video information sent from the main control module 110 to an external device connected to an external interface in the front panel, so as to perform online downloading of the video information. In this embodiment of the present invention, the main control module 110 can be configured to, when the online download instruction is obtained, parse the instruction, and call the video information meeting the parsing result range from the video storage module 310 to send to the second communication module, so as to be received by the external device connected to the front panel. The external device includes a PC with a network interface, a portable mobile device, and the like.
Further, the second communication module 130 is connected to the main control module 110 through a second network interface. The second communication module 130 is configured to transmit the online downloaded video information and transmit the video information to the main control module 110 through the second network interface. And the second network interface adopts a gigabit network interface. Preferably, the second network interface employs an RGMII interface. In the embodiment of the present invention, the second communication module 130 includes: the ethernet controller, the physical layer PHY chip, the network transformer and the TVS tube are built in the main control module 110. This module 130 utilizes this architecture to accomplish 1000Mbps full/half duplex RGMII ethernet functionality. Further, the physical layer PHY chip is preferably RTL 8211.
Further, in the practical application process, when the external device does not have a network interface, the video information to be downloaded online can also be acquired through the USB communication module 140. The USB communication module 140 is connected to the main control module 110 through a USB interface. The USB communication module 140 is used to transmit video information to be downloaded online. Wherein, the USB interface adopts a USB3.0 interface TYPE A TYPE connector. In the embodiment of the present invention, the module 140 specifically includes: a current limiting switch (not shown), and a TVS tube. Preferably, the current limit switch adopts a MAX1558H chip and has an automatic reset function; the TVS tube adopts special diodes VUSB054B and PUSB3FR 4.
Further, the video storage apparatus further includes a log recording module 150. The log recording module 150 is connected to the main control module 110, and is configured to store event information and a fault log for the video storage module. The event information comprises video information online downloading time, unexpected power failure or power down event and the like. The fault log includes: failure detection result information (failure detection information) such as data error correction and/or bad block management is stored in the video storage module 150.
In one embodiment, the logging module 150 is configured to store fault detection information for the video storage module 310. Wherein the failure detection information is a result of a failure detection process including data error correction and/or bad block management that characterizes the video storage module 150. The video storage module 310 is further configured to perform fault detection processing including data error correction and/or bad block management on the internal storage device in real time, generate corresponding fault detection information when a fault is detected, and send the information to the main control module 110. In this case, the main control module 110 is further configured to receive the fault detection information in real time, perform time stamping on the fault detection information, and forward the stamped fault detection information to the logging module 150 by using a connection relationship between the information and the logging module 150. Preferably, the logging module 150 uses a 64GByte EMMC, and it is implemented to record event information and fault log therein, and the read-write performance is better than NAND.
Further, the main control module 110 is mainly used for performing comprehensive management, regulation, encoding and decoding, transmission and control on video data and various instructions and signals, and the module 110 is a core control component of the video storage device of the present invention and adopts a microprocessor device. Preferably, in the embodiment of the present invention, the main control module 110 employs a LS1012 processor with low power consumption. Such a processor consumes less power than the X86 processor system.
Example two
In addition to the first embodiment described above with reference to fig. 2 and 3, the video storage apparatus further includes: the debugging module 161, the function resetting module 162, the real-time clock module 163, the timer module 164, the working state display module 165, the code storage module 166 and the standby storage module 167.
Specifically, the debugging communication module 161 is connected to the main control module 110, and is configured to transmit the debugging instruction to the main control module 110, and obtain and display the debugging result information sent by the main control module 110. The module 161 is used for issuing a program debugging instruction through a code debugging pin device during program debugging, and then displaying result information during debugging and the like, thereby realizing the function of the console. In the embodiment of the present invention, the debugging communication module 161 adopts an RS232 serial port communication channel. The module 161 specifically includes: the UART controller, the RS232 bus transceiver and the ESD protection chip are arranged in the main control module 110.
The function reset module 162 is connected to a working state monitoring device and a power management device in the train video monitoring system. Specifically, the input end of the function reset module 162 is connected to the voltage monitoring reset signal of the operating state monitoring device (refer to fig. 1) and the PMIC reset signal of the power management device (refer to fig. 1), and outputs the two signals to the power-on reset, the NOR FLASH chip and the ethernet switching chip of the main control module 110 after performing line and processing through the line and the logic circuit of the function reset module 162. In this way, the function reset module 162 can drive the video storage device to perform a reset operation after the train video monitoring system is reset.
The real-time clock module 163 is connected to the main control module 110, and is configured to provide time data for the main control module 110, so as to perform work status monitoring, time marking, and the like. Specifically, in the embodiment of the present invention, the real-time clock module 163 supports a real-time clock circuit, and provides calendar functions of year, month, day, hour, minute, second, etc. for the system. The real-time clock circuit specifically comprises: a real-time clock chip and a super capacitor. The real-time clock chip adopts RX-8571, and the capacity of the super capacitor is 1F. When the power panel 200 is powered off, the super capacitor of 1F is used to supply power to continuously provide time data to the main control module 110.
The timer module 164 is connected to the main control module 110, and is configured to monitor the working state of the main control module 110 in real time. The timer module 164 uses a watchdog circuit to communicate with the main control module 110 in real time.
The working state display module 165 is connected to the main control module 110 and integrated into the front panel. The working status display module 165 is used to display the working status of each module in the video storage device detected by the main control module 110. Wherein, the operating condition of each module includes: whether the input end of the main power module 210 of the storage device is normal, whether the running state of the main control module 110 is normal, whether the communication of the first communication module 120 is normal, whether the video storage module 310 detects a fault, whether the second communication module 130 is in a communication state, whether the second communication module 130 is in an online download communication state, whether the USB communication module 140 is in a communication state, whether the hard disk of the video storage module 310 is in place (that is, whether the hard disk is in a plug-in state), and the like. Preferably, the operation status display module 165 displays the operation status by using indicator lamps, wherein the definition of each indicator lamp is shown in table 1.
Table 1 indicator light definition table of the operation state display module 165
Further, a code storage module 166 is connected to the main control module 110. The code storage module 166 is used to store the program code of the main control module 110. In the embodiment of the present invention, the code storage module 166 is connected to a QSPI NOR FLASH memory chip with a capacity of 32MByte by using an SPI bus. In addition, the video storage apparatus further includes a spare storage module 167. Similarly, the backup memory module 167 is connected to the main control module 110. In the embodiment of the invention, the spare memory module adopts a DDRIII bus to realize the memory capacity of 1 GB.
The invention relates to a train video storage device. The device adopts a low-power-consumption microprocessor as a core control device, is provided with two gigabit Ethernet networks and one USB3.0 interface, facilitates the transmission and downloading of video data, greatly improves the communication speed, and enables the storage capacity to reach 2TB through a capacity-expandable solid state disk. Meanwhile, an electronic lock, a hard disk reset circuit, a power failure protection circuit and the like are designed, so that the reliability, the safety and the integrity of video information can be ensured. In addition, the invention also adopts EMMC as a storage medium for event recording and fault recording, and provides a large amount of data for subsequent analysis of the operation process of the device.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A video storage device for a train video surveillance system, comprising:
the first communication module is connected with an Ethernet switch board in the train video monitoring system and used for acquiring video information transmitted in real time in the running process of a train and transmitting the video information to the main control module through a first network interface, wherein the first network interface adopts a gigabit network interface;
the main control module is used for receiving the video information through the first network interface, analyzing and coding the video information, and further sending the processed video information to a video storage module through a high-speed data transmission interface;
the video storage module is used for acquiring the video information through the data high-speed transmission interface and storing the video information.
2. The storage device according to claim 1, wherein the video storage device comprises: an electronic lock, wherein,
the electronic lock is connected with the main control module and used for outputting a hard disk protection signal when the electronic lock is in an open state,
and the main control module is further used for entering a hard disk protection mode after receiving the hard disk protection signal so as to drive the video storage module to lock the stored video information.
3. The storage device of claim 2,
the main control module is further configured to detect the video storage module and initialize the video storage module if it is detected that the video storage module and the main control module are in a connected state again when entering a hard disk protection mode.
4. A storage device according to any one of claims 1 to 3, wherein the video storage device further comprises: a memory device reset module, wherein,
and the storage device resetting module is connected with the main control module and is used for detecting whether the main control module is subjected to restarting operation or not, and if so, driving the power supply of the video storage module to reset.
5. The storage device according to claim 1, wherein the video storage module is built in a protective case, and the protective case is of a pull-out structure.
6. The storage device according to any one of claims 1 to 5, wherein the video storage device further comprises: a power down protection module, wherein,
and the power failure protection module is connected with the power supply input end of the video storage device and is used for providing a standby power supply for the video storage device when the input power supply falls or is in power failure.
7. The storage device according to any one of claims 1 to 6, wherein the main control module adopts an LS1012 processor.
8. The storage device according to any one of claims 1 to 7, wherein the first network interface is an SGMII interface.
9. The storage device according to any one of claims 1 to 8, wherein the video storage device further comprises:
the second communication module is connected with the main control module through a second network interface and is used for transmitting the video information downloaded online in real time, wherein the second network interface adopts an RGMII interface; and/or
And the USB communication module is connected with the main control module through a USB interface and is used for transmitting the video information downloaded online, wherein the USB interface adopts a USB3.0 interface.
10. The storage device according to any one of claims 1 to 9, wherein the video storage device further comprises: a logging module that, wherein,
the log recording module is used for storing event information and fault logs aiming at the video storage module.
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