CN104853165A - WiFi-technology-based multi-media sensor network system - Google Patents
WiFi-technology-based multi-media sensor network system Download PDFInfo
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- CN104853165A CN104853165A CN201510243734.7A CN201510243734A CN104853165A CN 104853165 A CN104853165 A CN 104853165A CN 201510243734 A CN201510243734 A CN 201510243734A CN 104853165 A CN104853165 A CN 104853165A
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Abstract
The invention discloses a WiFi-technology-based multi-media sensor network system comprising a multimedia data acquisition module, a multimedia data control and processing module, a UWB wireless communication module, and an energy supply module. The multimedia data acquisition module, a multimedia data control and processing module, and the UWB wireless communication module are successively connected. The energy supply module provides energy for the multimedia data acquisition module, a multimedia data control and processing module, and the UWB wireless communication module. On the basis of the multi-process way, collection, processing, and compression of video data can be realized; and the video collection, video compression, and video sending are respectively carried out in independent threads. The transmission efficiency is high and the time delay is short.
Description
Technical field
The present invention relates to multimedia sensor network technology, specifically relate to a kind of multimedia sensor network system based on WiFi technology.
Background technology
In the last few years, the research of multimedia sensor network technology has caused the concern of scientific research personnel, a lot of scholar has carried out the exploratory development of multimedia sensor network aspect, in order to build the wireless multimedia sensor network of high-performance low-power-consumption, must in conjunction with the own characteristic of multimedia sensor network.Multimedia sensor network has calculating by one group, stores and distributed sensing network that the multimedia sensor node of communication capacity forms.It is by means of the media information of multi-media sensor perception place surrounding enviroment on node, comprise audio frequency, video, image and numerical value etc., by multi-hop relay mode, data are passed to converging information center, convergence center is analyzed Monitoring Data, realizes effective environmental monitoring comprehensively.A typical multimedia sensor network is made up of multimedia sensor node, aggregation node, control centre etc. usually, multimedia sensor node is dispersed in the sensing region of formulation, its data gathered are transmitted along other multimedia sensor node hop-by-hops, be sent to aggregation node through multihop routing, arrive control centre finally by internet or communication satellite.User to be configured sensor network by control centre and to manage, and issues monitoring task and collects Monitoring Data.
But traditional multimedia sensor network is in implementation procedure especially in video transmitting procedure, and cannot realize the transmission of huge the video data volume, transmission speed is slow.
Therefore, need to propose a kind of novel multimedia sensor network system.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides the multimedia sensor network system based on WiFi technology that a kind of efficiency of transmission is high, time delay is little.
Technical scheme: for achieving the above object, multimedia sensor network system based on WiFi technology of the present invention, comprise the multi-medium data acquisition module be connected to each other successively, multi-medium data controls and processing module and UWB wireless communication module, described multi-medium data acquisition module comprises audio collecting device, video capture device and image capture device, described multi-medium data controls comprise multimedia microprocessor kernel with processing module and interrupt controlling with the multimedia messages that described multimedia microprocessor kernel is connected respectively, multi-medium data encoding/decoding apparatus, multi-medium data A/D converter, multimedia data storage device, synchronous/asynchronous serial line interface and general purpose I/O interface, described UWB wireless communication module comprises short pulse generating assembly, send Sequence generation component, filtering and amplifier module, system gain and integration and time delay.
Further, also comprise for described multi-medium data acquisition module, multi-medium data control to provide with processing module and UWB wireless communication module the energy supply module of energy, described energy supply module comprises can store the energy, regenerative resource, can supplement the energy and intelligent energy management components.
Further, described video capture device adopts ARM9 SOC parts, and the wireless network card of the USB interface external support IEEE 802.g standard of described SOC parts realizes adopting WiFi technology.
Further, described video capture device adopts RTP/RTCP agreement.
Further, described video capture device adopts multi-process mode to realize data acquisition, process and transmission, described video capture device comprises video acquisition thread, video compression thread, video sends thread, video data pipeline and Video service process, described Video service process is responsible for described video acquisition thread, video compression thread, video sends establishment and the maintenance of thread and video data pipeline, after described video capture device starts, described Video service process is set up and video data pipeline described in initialization, then described Video service process intercepts network connection, when video connection request exceedes the maximum number of connections preset, described video acquisition thread starts to gather video data and the data of collection is sent to described video compression process and carries out video data compression, video data after compression send into described video data pipeline simultaneously described video data pipeline create new transmission of video thread.
Beneficial effect: the present invention compared with the prior art, advantage is that video sensor node of the present invention adopts the mode of multi-process to realize the collection of video data, process and compression, video acquisition, video compression and video send and carry out in independently thread respectively, and efficiency of transmission is high, time delay is little.
Accompanying drawing explanation
Fig. 1 is the multimedia sensor network system construction drawing based on WiFi technology;
Fig. 2 is that video capture device adopts multi-process mode to realize schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
With reference to Fig. 1, the multimedia sensor network system based on WiFi technology that the present invention proposes, comprises the multi-medium data acquisition module be connected to each other successively, multi-medium data controls and processing module and UWB wireless communication module, also comprises for described multi-medium data acquisition module, multi-medium data controls the energy supply module providing energy with processing module and UWB wireless communication module, and described multi-medium data acquisition module comprises audio collecting device, video capture device and image capture device, described multi-medium data controls comprise multimedia microprocessor kernel with processing module and interrupt controlling with the multimedia messages that described multimedia microprocessor kernel is connected respectively, multi-medium data encoding/decoding apparatus, multi-medium data A/D converter, multimedia data storage device, synchronous/asynchronous serial line interface and general purpose I/O interface, described UWB wireless communication module comprises short pulse generating assembly, send Sequence generation component, filtering and amplifier module, system gain and integration and time delay, described energy supply module comprises and can store the energy, regenerative resource, the energy and intelligent energy management components can be supplemented.
Described video capture device adopts ARM9 SOC core component, and the wireless network card of the USB interface external support IEEE 802.g standard of described SOC core component realizes adopting WiFi technology, and described video capture device adopts RTP/RTCP agreement.
With reference to Fig. 2, described video capture device adopts multi-process mode to realize data acquisition, process and transmission, described video capture device comprises video acquisition thread, video compression thread, video sends thread, video data pipeline and Video service process, described Video service process is responsible for described video acquisition thread, video compression thread, video sends establishment and the maintenance of thread and video data pipeline, after described video capture device starts, described Video service process is set up and video data pipeline described in initialization, then described Video service process intercepts network connection, when video connection request exceedes the maximum number of connections preset, described video acquisition thread starts to gather video data and the data of collection is sent to described video compression process and carries out video data compression, video data after compression send into described video data pipeline simultaneously described video data pipeline create new transmission of video thread.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (5)
1. the multimedia sensor network system based on WiFi technology, it is characterized in that: comprise the multi-medium data acquisition module be connected to each other successively, multi-medium data controls and processing module and UWB wireless communication module, described multi-medium data acquisition module comprises audio collecting device, video capture device and image capture device, described multi-medium data controls comprise multimedia microprocessor kernel with processing module and interrupt controlling with the multimedia messages that described multimedia microprocessor kernel is connected respectively, multi-medium data encoding/decoding apparatus, multi-medium data A/D converter, multimedia data storage device, synchronous/asynchronous serial line interface and general purpose I/O interface, described UWB wireless communication module comprises short pulse generating assembly, send Sequence generation component, filtering and amplifier module, system gain and integration and time delay.
2. as claimed in claim 1 based on the multimedia sensor network system of WiFi technology, it is characterized in that: also comprise for described multi-medium data acquisition module, multi-medium data control to provide with processing module and UWB wireless communication module the energy supply module of energy, described energy supply module comprises can store the energy, regenerative resource, can supplement the energy and intelligent energy management components.
3. as claimed in claim 1 based on the multimedia sensor network system of WiFi technology, it is characterized in that: described video capture device adopts ARM9 SOC parts, the wireless network card of the USB interface external support IEEE 802.g standard of described SOC parts realizes adopting WiFi technology.
4. as claimed in claim 1 based on the multimedia sensor network system of WiFi technology, it is characterized in that: described video capture device adopts RTP/RTCP agreement.
5. as claimed in claim 1 based on the multimedia sensor network system of WiFi technology, it is characterized in that: described video capture device adopts multi-process mode to realize data acquisition, process and transmission, described video capture device comprises video acquisition thread, video compression thread, video sends thread, video data pipeline and Video service process, described Video service process is responsible for described video acquisition thread, video compression thread, video sends establishment and the maintenance of thread and video data pipeline, after described video capture device starts, described Video service process is set up and video data pipeline described in initialization, then described Video service process intercepts network connection, when video connection request exceedes the maximum number of connections preset, described video acquisition thread starts to gather video data and the data of collection is sent to described video compression process and carries out video data compression, video data after compression send into described video data pipeline simultaneously described video data pipeline create new transmission of video thread.
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