CN111800610A - Wired and wireless combined graph transmission system for emergency environment - Google Patents
Wired and wireless combined graph transmission system for emergency environment Download PDFInfo
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- CN111800610A CN111800610A CN202010623513.3A CN202010623513A CN111800610A CN 111800610 A CN111800610 A CN 111800610A CN 202010623513 A CN202010623513 A CN 202010623513A CN 111800610 A CN111800610 A CN 111800610A
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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
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/913—Television signal processing therefor for scrambling ; for copy protection
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Abstract
The invention provides a wired and wireless combined graph transmission system for an emergency environment, which comprises a plurality of movable emergency vehicles and a command center, wherein the plurality of movable emergency vehicles carry out video data transmission with the command center in a wireless transmission mode; the vehicles can transmit video data to each other in a wireless transmission or wired transmission mode; the emergency vehicle is provided with an image acquisition device and an image processing and transmitting device, and images acquired by the image acquisition device are processed by the image processing and transmitting device and then transmitted. The invention effectively solves the problem that the single image transmission mode has low practicability in an emergency environment. Meanwhile, the video data in the vehicle is converted into a network cable and transmitted by a switch, so that the flexibility of the whole system is improved; and a security module is added, so that the security of video transmission is protected.
Description
Technical Field
The invention relates to the field of communication, in particular to a graph transmission system combining wired and wireless in an emergency environment.
Background
With the rapid development of society, whether emergency events occur frequently in army or public security organization, whether on-site audio and video information can be efficiently transmitted to a command center or related organizations, and whether related personnel can make scientific decisions, effectively coordinate and organize is directly influenced. With the development of the technology, the image transmission means are very abundant, generally, the image transmission channel is divided into a wired image transmission scheme and a wireless image transmission scheme, and the wired channel is a covered wire, an optical fiber and the like; the wireless channel is ultrashort wave, 4G and the like. The wired transmission scheme has the advantages of long development time, mature technology, high sensitivity, strong anti-electromagnetic interference capability, safe data transmission, large transmission bandwidth and the like, but the transmission of wired media is very inconvenient or even impossible to apply in complex environments or mobile environments. The wireless transmission scheme can effectively work in complex environment and mobile environment, and is very convenient for users. However, in the prior art, wireless transmission also has poor interference resistance, insufficient transmission bandwidth and the like, so that the image transmission effect is greatly reduced. In the current emergency environment, a general scheme is that an image transmission means is directly selected to work, basically, a single image transmission means is used for image acquisition, and a single image transmission medium has a good image transmission effect only under a single condition due to the defects of the single image transmission medium in the emergency environment, but in the case of a changeable and complex emergency environment, the single image transmission medium scheme is difficult to deal with. Finally, the existing scheme is difficult to obtain effective image transmission quality, and the management of related personnel on personnel and emergency environment events is directly influenced.
Disclosure of Invention
Aiming at the problems in the prior art, a graph transmission system combining wired and wireless in emergency environment is provided.
The technical scheme adopted by the invention is as follows: a wired and wireless combined image transmission system for an emergency environment comprises a plurality of movable emergency vehicles and a command center, wherein the plurality of movable emergency vehicles perform video data transmission with the command center in a wireless transmission mode; the vehicles can transmit video data to each other in a wireless transmission or wired transmission mode; the emergency vehicle is provided with an image acquisition device and an image processing and transmitting device, and images acquired by the image acquisition device are processed by the image processing and transmitting device and then transmitted.
Furthermore, the image acquisition device comprises a camera and a PC (personal computer), wherein the PC is used for storing and displaying image data acquired by the camera.
Further, the image processing and transmitting device comprises: the system comprises a video access terminal, a switch, a cipher machine, a wired transmission device and a wireless transmission device, wherein the video access terminal is used for carrying out audio and video coding and decoding and video processing on video data transmitted by a plurality of PC computers; the cipher machine is used for encrypting and decrypting the multi-video data; the wired transmission device is used for carrying out wired transmission of data with other wired transmission devices of the emergency vehicle; the wireless transmission device is used for carrying out wireless data transmission with wireless transmission devices and command centers on other emergency vehicles.
Further, the specific process of sending video data when the emergency vehicle is used as a sending end is as follows: the camera gathers video data and passes into the PC, and the PC passes into the video access terminal with the video data who gathers and handles the back, passes into the switch again after the cipher machine is encrypted, according to current channel condition, selects wired transmission device or wireless transmission device to transmit to the channel that other emergent vehicles correspond, sends to command center through unlimited transmission device simultaneously.
Further, the specific process of receiving video data when the emergency vehicle serves as a receiving end is as follows: the emergency vehicle receives video data in a corresponding channel through a wired transmission device or a wireless transmission device, transmits the video data into the switch, transmits the information into the switch again after decryption processing of the cipher machine, and finally transmits the video into a PC computer for storage and display.
Furthermore, the camera adopts an IP camera.
Further, the cipher machine adopts des encryption mode to encrypt and decrypt.
Furthermore, the wired transmission mode adopts an Intel enhanced coated wire transmission device, and when the performance index of the coated wire is 1km of communication distance, the transmission speed is not less than 10 Mbit/s; the transmission distance of the bus type covered wire is not less than 10km, and the maximum transmission speed is not less than 1.5 Mbit/s.
Furthermore, the wireless transmission mode adopts a vast broadband wireless transmission device, and performance indexes are that the communication distance is not less than 11km and the maximum communication speed is not less than 5 Mbit/s; the typical mountain area communication distance is not less than 7km, and the maximum communication speed is not less than 1 Mbit/s.
Compared with the prior art, the beneficial effects of adopting the technical scheme are as follows: in the face of a constantly-changing emergency environment, a wired and wireless combined image transmission scheme effectively avoids the situation that a single image transmission mode cannot be completely applied, in the face of an emergency vehicle static moment, a wireless transmission mode is easily interfered by the outside due to the characteristics of wireless signals of the wireless transmission mode, and the transmission bandwidth and the transmission efficiency are far inferior to those of the wired image transmission mode in a long time or urban area. In a changeable emergency environment, emergency vehicles need to be adjusted or graph transmission is carried out during movement when the situation changes at any time, and at the moment, due to the limitation of the wired graph transmission mode, the graph transmission function cannot be realized under the situation. According to the technical scheme, under the emergency environment, a wired or wireless image transmission mode is selected at any time according to the specific situation of the site at that time, the practicability is very high, and the application range is very wide.
Drawings
Fig. 1 is a schematic diagram of a wired transmission scheme in the present invention.
Fig. 2 is a schematic diagram of a wireless transmission scheme in the present invention.
Fig. 3 is a schematic diagram of an internal system architecture of an emergency vehicle according to the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 and fig. 2, a graph transmission system combining wired and wireless emergency environments comprises a plurality of mobile emergency vehicles and a command center, wherein the plurality of mobile emergency vehicles perform video data transmission with the command center in a wireless transmission manner; the vehicles can transmit video data to each other in a wireless transmission or wired transmission mode; the emergency vehicle is provided with an image acquisition device and an image processing and transmitting device, and images acquired by the image acquisition device are processed by the image processing and transmitting device and then transmitted.
Specifically, as shown in fig. 3, the image capturing device includes a camera and a PC computer, and the PC computer is used for storing and displaying image data captured by the camera. The image processing and transmitting device comprises: the system comprises a video access terminal, a switch, a cipher machine, a wired transmission device and a wireless transmission device, wherein the video access terminal is used for carrying out audio and video coding and decoding and video processing on video data transmitted by a plurality of PC computers; the cipher machine is used for encrypting and decrypting multiple video data to ensure the safety of the data; the wired transmission device is used for carrying out wired transmission of data with other wired transmission devices of the emergency vehicle; the wireless transmission device is used for carrying out wireless data transmission with wireless transmission devices and command centers on other emergency vehicles.
As shown in fig. 3, the specific process of sending video data when the emergency vehicle is used as a sending end is as follows: the camera gathers video data and passes into the PC, and the PC passes into the video access terminal with the video data who gathers and handles the back, passes into the switch again after the cipher machine is encrypted, according to current channel condition, selects wired transmission device or wireless transmission device to transmit to the channel that other emergent vehicles correspond, sends to command center through unlimited transmission device simultaneously.
The specific process of receiving video data when the emergency vehicle is used as a receiving end is as follows: the emergency vehicle receives video data in a corresponding channel through a wired transmission device or a wireless transmission device, transmits the video data into the switch, transmits the information into the switch again after decryption processing of the cipher machine, and finally transmits the video into a PC computer for storage and display.
In a preferred embodiment, the camera adopts an IP camera, image information can be set according to the IP, and the practicability is higher.
In a preferred embodiment, the cipher machine adopts des encryption mode to encrypt and decrypt.
In a preferred embodiment, the video access terminal supports 1 HDMI super-definition input interface and 1 HDMI super-definition output interface; 1 3G-SDI input interface and 1 3G-SDI output interface are supported; 1 network port is supported, and 10/100/1000M network is supported; the system supports 1-path loudspeaker sound output and supports two receiver outputs such as a handle or an earphone; support for 1-way microphone input of a handle or headset; and the full working state is less than 20W.
In a preferred embodiment, the switch supports 14 10/100/1000M adaptive network interfaces and 4 gigabit optical interfaces; the standard accords with the common standards of IEEE802.3 i, IEEE802.3 u, IEEE802.3 ab, IEEE802.3z, IEEE802.3x, IEEE 802.1p and the like; supporting STP/RSTP/MSTP protocol, VRRP and other redundancy protocols; VLAN division, port mirroring and MAC address binding are supported; support of Qos functions: support 802.1P/DSCP priority re-marking management and maintenance functions: SNMPV1/V2, supporting Console, Telnet and CLI functions; flow control in full duplex and half duplex modes is supported; supporting module function self-checking and self-checking result query; supporting static routing, OSPF dynamic routing protocol; and multicast routing protocols such as IGMP-SNOOPING, PIM-SM, PIM-DM and the like are supported.
In a preferred embodiment, the wired transmission mode adopts an Intel enhanced duplex transmission device, and when the performance index of the duplex is 1km of communication distance, the transmission speed is not less than 10 Mbit/s; the transmission distance of the bus type covered wire is not less than 10km, and the maximum transmission speed is not less than 1.5 Mbit/s. The complex line transmission device can be connected with a device to be transmitted (BFE-A/B) in a butt joint mode. Point-to-point multi-service telecommunications is implemented, as well as multi-service remote access to telephone switching networks, data (packet) switching networks, and IP networks. The field operations complex line platform supports 1 path of two-line analog voice, 1 path of Ethernet data multiplexing and long-distance transmission. The new generation of SHDSL transmission technology is adopted, and a pair of twisted pair metal wires is used as a transmission medium, so that the multiplexing and long-distance bidirectional symmetrical transmission of voice and Ethernet data are realized. The transmission board is provided with 1 path of independent DSL transmission link, and 1 path of Ethernet data interface and 1 path of two-wire telephone interface are configured.
In a preferred embodiment, the wireless transmission mode adopts a spacious broadband wireless transmission device, and the performance indexes are that the communication distance is not less than 11km, and the maximum communication speed is not less than 5 Mbit/s; the typical mountain area communication distance is not less than 7km, and the maximum communication speed is not less than 1 Mbit/s.
In actual emergency environment, meet emergency vehicle at any time and stop, the processing incident or the condition change need the vehicle to remove to image information continues the transmission condition, the emergent environment of experiment simulation, when the incident needs the vehicle static, chooseing for use wired transmission mode, the vehicle need move constantly, chooseing for use wireless transmission mode, through the experiment. Under the two conditions, the video can be transmitted from the vehicle to the vehicle and from the vehicle to the command center in the best state, so that the advantages of the two image transmission means are fully exerted, and the problem that the practicability of a single image transmission mode in an emergency environment is not high is effectively solved. Meanwhile, the video data in the vehicle is converted into a network cable and transmitted by a switch, so that the flexibility of the whole system is improved; and a security module is added, so that the security of video transmission is protected.
The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed. Those skilled in the art to which the invention pertains will appreciate that insubstantial changes or modifications can be made without departing from the spirit of the invention as defined by the appended claims.
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
Claims (9)
1. A wired and wireless combined image transmission system for an emergency environment is characterized by comprising a plurality of movable emergency vehicles and a command center, wherein the plurality of movable emergency vehicles perform video data transmission with the command center in a wireless transmission mode; the vehicles can transmit video data to each other in a wireless transmission or wired transmission mode; the emergency vehicle is provided with an image acquisition device and an image processing and transmitting device, and images acquired by the image acquisition device are processed by the image processing and transmitting device and then transmitted.
2. The wired and wireless combined image transmission system for emergency environment according to claim 1, wherein the image acquisition device comprises a camera and a PC computer, and the PC computer is used for storing and displaying the image data acquired by the camera.
3. The system of claim 2, wherein the image processing and transmitting device comprises: the system comprises a video access terminal, a switch, a cipher machine, a wired transmission device and a wireless transmission device which are sequentially connected, wherein the video access terminal is used for receiving video data transmitted by a PC (personal computer) and carrying out audio and video coding and decoding and video processing; the cipher machine is used for encrypting and decrypting the video data; the wired transmission device is used for carrying out wired transmission of data with other wired transmission devices of the emergency vehicle; the wireless transmission device is used for carrying out wireless data transmission with wireless transmission devices and command centers on other emergency vehicles.
4. The wired and wireless combined graph transmission system of emergency environment according to claim 3, wherein the specific process of sending video data when the emergency vehicle is used as the sending end is as follows: the camera gathers video data and passes into the PC, and the PC passes into the video access terminal with the video data who gathers and handles the back, passes into the switch again after the cipher machine is encrypted, according to current channel condition, selects wired transmission device or wireless transmission device to transmit to the channel that other emergent vehicles correspond, sends to command center through unlimited transmission device simultaneously.
5. The system of claim 4, wherein the video data is received when the emergency vehicle is used as a receiving end by the following specific processes: the emergency vehicle receives video data in a corresponding channel through a wired transmission device or a wireless transmission device, transmits the video data into the switch, transmits the information into the switch again after decryption processing of the cipher machine, and finally transmits the video into a PC computer for storage and display.
6. The system according to claim 1, wherein the camera is an IP camera.
7. The system of claim 5, wherein the cryptographic engine encrypts and decrypts the data using des encryption.
8. The system according to claim 1, wherein said wired transmission mode is an intemational duplex transmission device, and the performance index of the duplex transmission device is 1km, the transmission rate is not less than 10 Mbit/s; the transmission distance of the bus type covered wire is not less than 10km, and the maximum transmission speed is not less than 1.5 Mbit/s.
9. The wired and wireless combined graph transmission system of emergency environment according to claim 1, wherein said wireless transmission mode adopts a vast broadband wireless transmission device, and the performance indexes are that the communication distance is not less than 11km, and the maximum communication speed is not less than 5 Mbit/s; the typical mountain area communication distance is not less than 7km, and the maximum communication speed is not less than 1 Mbit/s.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010623513.3A CN111800610A (en) | 2020-06-29 | 2020-06-29 | Wired and wireless combined graph transmission system for emergency environment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010623513.3A CN111800610A (en) | 2020-06-29 | 2020-06-29 | Wired and wireless combined graph transmission system for emergency environment |
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