CN201294542Y - Audio/video wireless transmission equipment of camera with controllable pendulum motion and zoom - Google Patents

Abstract

The utility model discloses an audio-video wireless transmission device which can control a camera to swing and zoom, and can be rapidly laid. The utility model relates to a wireless multimedia sensor network which and can achieve to control the camera to swing and zoom and has the wireless transmission function of audio and video, and relates to the electronic information technology and the audio-video wireless transmission technology. The network system comprises a first node (1), a second node (2), a third node (3), a forth node (4), a fifth node (5), a sixth node (6), a seventh node (7), an eighth node (8) and a strong Skink node 22 which are formed into a field audio-video sensor network system. A center monitor control scheduling computer system comprises a host computer (31), a display screen (32), a wireless network card (33), a key board (34), a horn (35) and a sound box (36), which generally uses a vehicle type, and achieves two-way audio-video communication through the strong Skink node on site and the audio-video sensor network on the site. Under the emergency environment that a communication public network fails or a project rushes an emergency and the like, emergency people carry a plurality of node devices and strong Sink node devices to rapidly deploy on the site.

Description

Video camera swing and the controlled audio-video wireless transmission equipment of convergent-divergent

Technical field

The utility model relates to quick fast structure of a kind of energy and laying, and can realize video camera is swung the radio communication mesh network system of controlling and having sound, video wireless transmission function with convergent-divergent, node in this network system is except having storage and transmitting the data of adjacent node, also has video and audio-frequency information obtains, by internodal broadband wireless communications transmission link realize looking, audio-frequency information transmits in many (pursuing) jumping mode in network, belongs to electronic information technology and sound, video wireless communication technology field.

Background technology

Along with the increase of human social activity's intensity, sudden accident increases gradually, and paroxysmal natural and man-made calamities are of common occurrence.This class accident form has diversity, has emergentness, dispose have thorny property, harm has seriousness, constitute a serious threat to the people life property safety, also be one of factor leading to social instability that constitutes society, be subjected to the extensive concern of countries in the world.

Particularly when geological disaster, bridge, hazardous materials transportation vehicles such as some coal mining accidents of disposal, great production accident, earthquake, mud-rock flow, avalanche, slump, surface collapse, surface subsidence, can run into that public communication network can't effectively play a role even public communication network interrupts and paralysis, bring great inconvenience for emergency repair and command scheduling, because the difficulty of communication, the loss that causes also can't be estimated.

Generally, when emergency repair, wireless interspeaker is a kind of communication work of using always, wireless interspeaker is with easy to carry, advantages such as communication distance is far away, but when emergency disposal, the personnel that speedily carry out rescue work can influence and disperse the personnel's of speedily carrying out rescue work attentiveness by intercom with interim communicating by letter of emergency disposal center, and communication mode is point-to-point, and the scene of speedily carrying out rescue work also can't be understood in real time by command centre.

Based on this, the present invention designs a kind of can the deployment fast at the scene of speedily carrying out rescue work, and the broadband wireless sensor network system that can realize video camera swing and convergent-divergent are controlled and had sound, video wireless transmission function, this system is a kind of based on wireless mesh network with the defeated mode of many (pursuing) jump set and ad hoc networking technical characteristic.The deployed position of each node can be laid at random in the network, and node device installs and fixes very convenient.Each network node all has real-time collection site video pictures function, and according to interim command centre dispatching command transmission of video, each node provides on-the-spot voice communication to interim command centre simultaneously, and interim command centre is to on-the-spot voice broadcast service scheduling.

Summary of the invention

Technical problem: the purpose of this utility model provides a kind of video camera swing and the controlled audio-video wireless transmission equipment of convergent-divergent, can realize video camera swing and convergent-divergent are controlled and had a sound, the wireless multimedia sensor network system of video wireless transmission function, when communicate by letter public network paralysis or emergency dealing are emergent, the interim wireless broadband communication network environment that makes up, realize that interim command centre communicates by letter and voice communication with the live video of speedily carrying out rescue work, be quick disposal accident, correct decisions tries to gain time precious to one, for effectively understanding and control state of affairs scope, shorten duration of fault, minimum is reduced in the loss of accident a kind of powerful technical support is provided.

Technical scheme: the utlity model has video camera and swing controlled and the audio-video wireless transfer function with convergent-divergent, and the wireless multimedia sensor network system that fast lays advantage, it comprises live video, audio sensor network node and strong Sink node and interim command centre monitoring and scheduling computer.

This network system is by first node, Section Point, the 3rd node, the 4th node, the 5th node, the 6th node, the 7th node, the 8th node and a strong Sink node composition scene are looked, the audio sensor network, described first node, Section Point, the 3rd node, the 4th node, the 5th node, the 6th node, interconnect by the 2.4GHz radio frequency wireless link between the 7th node and the 8th node and between each node and the strong Sink node, each node operation IPV6 agreement, each node is except having storage and transmitting the data of adjacent node, also have perception and gather video and audio-frequency information, realize looking by broadband wireless link between node, audio-frequency information the net in the multi-hop mode, or the hop-by-hop mode is transmitted, thereby form a kind of have the carrying look, the broadband radio multi-media sensor network of audio service ensures that at the application layer custom protocol audio/video information hop-by-hop formula in the wireless multimedia sensor network of laying transfers to strong Sink node; Main frame, display, wireless network card, keyboard, loudspeaker and audio amplifier constitute center monitoring dispatching system, described display inserts the VGA interface of main frame by the VGA cable, wireless network card directly links to each other with the USB interface of main frame, keyboard directly links to each other with another USB interface of main frame, and loudspeaker directly link to each other with the MIC interface with the Speaker interface of main frame with audio amplifier; Center monitoring dispatching system sets up the physical connection of communicating by letter by the direct and strong Sink node wireless connections of wireless network card, and center monitoring dispatching system implements management by strong Sink node to wireless multimedia sensor network node and the resource laid.

Described first node, Section Point, the 3rd node, the 4th node, the 5th node, the 6th node, the 7th node, the 8th node hardware component units are the same with physical structure, are made up of phase lock circuitry, audio coding decoding circuit, audio frequency input/output interface, video coding circuit, central processing unit circuit, FPGA circuit, 802.11b wireless communication module unit module; Wherein the model of 802.11b wireless communication module is TNET110B, and the selected circuit model of phase lock circuitry is PLL1708, and the selected model of audio coding decoding circuit is TMS320AIC23b; The two-way pulse clock signal that phase lock circuitry produces is exported by 2 pin and 3 pin of phase lock circuitry respectively, and directly links to each other with 3 pin with 2 pin of audio coding decoding circuit, provides required clock signal to voicefrequency circuit; The audio frequency output pin of audio coding decoding circuit is 12 pin and 13 pin, respectively by forming filter circuit by the 4th electric capacity and the 7th resistance, the 6th electric capacity and the 8th resistance, and link to each other the output stereo audio respectively with the audio frequency input/output interface with the 13 current-limiting resistance through the 12 current-limiting resistance; The filter circuit that the audio frequency input is formed through current-limiting resistance, the 9th resistance and the tenth electric capacity respectively, the filter circuit that the 15 current-limiting resistance, the 9th resistance and the 11 electric capacity are formed is more respectively through 19 pin and 20 pin of the 7th capacitance and the 8th capacitance input audio coding decoding circuit; The video inputs process is by inductor, filter circuit that first electric capacity and the 5th electric capacity are formed and the 5th resistance and the 9th electric capacity are formed the 10 pin input of RC filter from video encoder, 3 pin of audio coding decoding circuit, 4 pin, 5 pin, 6 pin, 7 pin respectively with the AD14 pin of CPU, the AC14 pin, the Ab14 pin, the AC9 pin, the AD10 pin links to each other, CPU is selected the high-end dsp chip of TI company, its model is DMA642, its data/address bus VPID9-VPID2 directly links to each other with the XPD0-XPD7 of video encoder, the SCL of central processing unit circuit directly directly links to each other with the SDA pin with the SCL of video encoder with the SDA pin, be used for the initial configuration of central processing unit circuit to video encoder, it is the chip of EP1C6Q240C8 that the FPGA circuit is selected model for use, mainly finish the generation of the described clock signal of system, 3 of FPGA circuit, 4,5,64 pin respectively with the central processing unit circuit /CE0, / BE0, / BE1, / EA204 signal pins directly connects, 11 of FPGA circuit, 12 pin respectively with 7 pin of 802.11b wireless communication module, 12 pin directly link to each other, 802.11b 58 pin of wireless communication module, 16 pin, 21 pin, 61 pin, 60 pin respectively with the general input and output pin GPI08 pin of central processing unit circuit, the GPI07 pin, read signal/OE pin, write signal/WE pin, standby ready signal/RDY pin is connected with general input and output pin GPI09 pin, 802.11b 16 bit address line A0-A15 of wireless communication module link to each other with the address wire EA3-EA18 of central processing unit circuit respectively, 16 position datawires of 802.11b wireless communication module directly link to each other with the data wire ED0-ED15 of central processing unit circuit respectively; PTZ controller central processing circuit is selected the Atmeg16 single-chip microcomputer for use; 6 I/O pin of 8 I/O pin of the PA mouth of this single-chip microcomputer and PC mouth are respectively applied for the action of control The Cloud Terrace and camera lens; 27 pin of this single-chip microcomputer directly link to each other with the AE16 pin with the AC16 of central processing unit circuit with 28 pin; finish the serial communication of central processing unit circuit and Atmeg16 single-chip microcomputer; what the motor-drive circuit of PTZ controller was selected for use is that the special-purpose segmentation of two-phase stepper motor chip for driving A3979 constitutes corresponding subdivision driver; control about the The Cloud Terrace level and vertical up-or-down movement, be used for aperture zoom lens; focus on; the circuit that becomes doubly three direct current machine enforcement controls selects 4555 pairs four of integrated circuits to select an integrated circuit by two four; two four select an integrated circuit; two four select an integrated circuit; first optocoupler; second optocoupler; the 3rd optocoupler; the 4th optocoupler; inverter MC1413; P type ditch FET power tube and N type ditch FET power tube constitute the push-pull type power drive; the metal oxide piezo-resistance is formed as instantaneous absorption protector and some necessary Resistor-Capacitor Units.

The center monitoring dispatching is a core with the built-in industrial mainboard, make up by the expansion peripheral hardware, serial communication interface, Ethernet interface, 802.11b wireless communication interface term extended wireless network interface card, the camera of band USB interface is by the video image of USB interface collection site, and the VGA video output links to each other with LCD, is used for man-machine interaction, DMA interface links to each other with portable hard drive, the DIMM interface links to each other with the DDR266 internal memory, and power interface links to each other with switching power unit, is used for system's power supply, audio interface is attacked to put with loudspeaker by audio frequency and is linked to each other, be used for the output of audio frequency, and audio interface links to each other directly with microphone, be used for the audio frequency input.

Described strong Sink node is made up of built-in industrial mainboard, Switching Power Supply, memory modules, CF interface wireless Wlan card, portable hard drive, GPS module, satellite data transceiver module, 485 communication modules, LCD display module; Described built-in industrial mainboard, selected model are that the EC5-1719CLDNA that the company of raising produces is ground in Taiwan, and CPU is a double-core; Described Switching Power Supply directly links to each other with the Power interface of built-in industrial mainboard; Described memory modules model is DDR266, links to each other with the DIMM interface of built-in industrial mainboard, and capacity is 1G; Described CF interface wireless Wlan card directly links to each other with the CF interface of built-in industrial mainboard, supports the 802.11b communication standard; Described portable hard drive directly links to each other with the DMA interface of built-in industrial mainboard, is used for installing operating system software and application software and preserves data; Described GPS module interconnects by the RS232 interface of mainboard; Described satellite data transceiver module directly links to each other with the USB interface of mainboard, is used for the on-the-spot significant data of long-range transmission to higher level department; Described 485 communication modules directly link to each other with the serial communication interface of built-in industrial mainboard, are used to dispose the required communication interface of strong Sink node; Described LCD display module links to each other with the VGA interface of built-in industrial mainboard, is used to show the human-machine interactive information of strong Sink node when configuration.

Beneficial effect: the utility model relates to a kind of video camera swing and the controlled audio-video wireless transmission equipment of convergent-divergent, and can realize video camera swing and convergent-divergent are controlled and had a sound, the system of video wireless transmission function, node in the network is except having storage and transmitting the data of adjacent node, also have perception and gather video and audio-frequency information, realize looking by broadband wireless link between node, audio-frequency information transmits in many (pursuing) jumping mode in network, thereby forms a kind of carrying sound that has, the broadband radio multi-media sensor network of video traffic.Network node is a core with the DSP device, have extending video, audio frequency input and output circuit, memory, video camera PTZ (pan swing, tilt tilts, the zoom convergent-divergent) controller and based on 802.11b broadband wireless communications interface, network node has been transplanted the IPv6 agreement, and can support functions such as ad hoc networking communication.

Thereby form and a kind ofly have that carrying is looked, the broadband radio multi-media sensor network (system) of audio service.This network node is core with the dsp chip, have extended audio, video input and output circuit, procedure stores, data storage, the PTZ of video camera (pan swing, tilt tilts, the zoom convergent-divergent) controller and based on 802.11b broadband wireless communications interface, transplant the IPv6 agreement, support functions such as wireless Ad Hoc group-net communication.

Described quick laying and the wireless multimedia sensor network system that can realize video camera swing and convergent-divergent are controlled and had sound, video wireless transmission function, it is a kind of wireless mesh network system, and this network system is a kind of broadband wireless network mesh network system with the defeated mode of many (pursuing) jump set and ad hoc networking technical characteristic.When communication public network and the paralysis of original video monitoring system, perhaps when emergency dealing is emergent, need the interim broadband wireless communication network environment that makes up, realize that quickly interim command centre communicates by letter and voice communication with the live video of speedily carrying out rescue work, for disposal accident, correct decisions in time tries to gain time precious to one,, shorten duration of fault for effectively understanding and control state of affairs scope, the loss of accident is reduced to minimum, a kind of powerful technical support is provided.

Description of drawings

Fig. 1 is a networking functional-block diagram of the present utility model;

Fig. 2 is that scene of the present utility model is looked, the electrical schematic diagram of audio sensor network node;

Fig. 3 is the central processing unit pin resource allocation schematic diagram of the utility model PTZ controller;

Fig. 4 is the motor-drive circuit schematic diagram of the utility model PTZ controller;

Fig. 5 is the schematic diagram of the adjusting lens parameters of the utility model PTZ controller;

Fig. 6 is the interim command centre of a utility model monitoring and scheduling Computer Organization Principles block diagram;

Fig. 7 is a strong Sink node circuit schematic diagram of the present utility model;

Fig. 8 is the theory diagram that communication link and topology are set up in node self-organizing of the present utility model;

Fig. 9 is the interim command centre of a utility model monitoring and scheduling software function module block diagram.

Embodiment

As shown in Figure 1, the present invention is by node 1, node 2, node 3, node 4, node 5, node 6, node 7, node 8 and a strong Sink node 22 are formed the spot sensor network system, main frame 31, display 32, wireless network card 33, keyboard 34, loudspeaker 35 and audio amplifier 36 constitute center monitoring dispatching system, the vehicle-mounted mode of general employing, communicate by letter by strong Sink node in scene and the two-way audio frequency and video of spot sensor network system realization, under emergency environmentals such as emergency dealing, the emergency worker carries some nodes and strong Sink node carries out quick field deployment node apparatus, next strong Sink node of normal conditions is in charge of 8 nodes as the coordinator, can expand the quantity of strong Sink node and ordinary node according to the scene, but, strong Sink node of the present invention can only be in charge of 8-10 node, and internodal communication distance is about 100 meters.

As shown in Figure 2, described first node 1, Section Point 2, the 3rd node 3, the 4th node 4, the 5th node 5, the 6th node 6, the 7th node 7, the 8th node 8 hardware component units are the same with physical structure, are made up of phase lock circuitry U1, audio coding decoding circuit U 2, audio frequency input/output interface J2, video coding circuit U3, central processing unit circuit U 4, FPGA circuit U 5,802.11b wireless communication module U6 unit module;

Wherein the model of 802.11b wireless communication module U6 is TNET110B, the selected circuit model of phase lock circuitry U1 is PLL1708, the two-way pulse clock signal that produces is exported by 2 pin and 3 pin of PLL1708 respectively, and directly link to each other with 3 pin with 2 pin of audio coding decoding circuit U 2, provide required clock signal to voicefrequency circuit; Audio coding decoding circuit U 2 selected models are TMS320AIC23b, its audio frequency output pin is 12 pin and 13 pin, respectively by forming filter circuit by the 4th capacitor C 4 and the 7th resistance R 7, the 6th capacitor C 6 and the 8th resistance R 8, and link to each other the output stereo audio respectively with audio frequency input/output interface J2 with the 13 current-limiting resistance R13 through the 12 current-limiting resistance R12;

The filter circuit that audio frequency input is formed through R14 current-limiting resistance, R9 and C10 respectively, the filter circuit that R15 current-limiting resistance, R10 and C11 form is more respectively through 19 pin and 20 pin of capacitance C7 and C8 input audio coding decoding circuit U 2; The video inputs process is by L1, filter circuit that C1 and C5 form and R5 and C9 form the 10 pin input of RC filter from video encoder U3,3 pin of audio coding decoding circuit U 2,4 pin, 5 pin, 6 pin, 7 pin respectively with the AD14 pin of CPU U4, the AC14 pin, the Ab14 pin, the AC9 pin, the AD10 pin links to each other, CPU U4 selects the high-end dsp chip of TI company, its model is DMA642, its data/address bus VPID9-VPID2 directly links to each other with the XPD0-XPD7 of video encoder U3, the SCL of central processing unit circuit U 4 directly directly links to each other with the SDA pin with the SCL of video encoder U3 with the SDA pin, the initial configuration that is used for 4 couples of video encoder U3 of central processing unit circuit U, FPGA circuit U 5 is mainly finished the generation of the described clock signal of system, 3 of FPGA circuit U 5,4,5,64 pin respectively with central processing unit circuit U 4 /CE0, / BE0, / BE1, / EA204 signal pins directly connects, 11 of FPGA circuit U 5,12 pin respectively with 7 pin of 802.11b wireless communication module U6,12 pin directly link to each other, 802.11b 58 pin of wireless communication module U6,16 pin, 21 pin, 61 pin, 60 pin respectively with the general input and output pin GPI08 pin of central processing unit circuit U 4, the GPI07 pin, read signal/OE pin, write signal/WE pin, standby ready signal/RDY pin is connected with general input and output pin GPI09 pin, 802.11b the 16 bit address line A0-A15 of wireless communication module U6 link to each other with the address wire EA3-EA18 of central processing unit circuit U 4 respectively, 16 position datawires of 802.11b wireless communication module U6 directly link to each other with the data wire ED0-ED15 of central processing unit circuit U 4 respectively.

As shown in Figure 3, the PTZ controller central processing circuit of gamma camera is selected the Atmeg16 single-chip microcomputer for use, operating frequency reaches 16MNz, carry the memory of 128K and the EEPROM of 4K, 6 I/O pin of 8 I/O pin of the PA mouth of this single-chip microcomputer and PC mouth are respectively applied for the action of control The Cloud Terrace and camera lens, the AC16 of central processing unit circuit U 4 directly links to each other with the AE16 pin among 27 pin of this single-chip microcomputer and 28 pin and Fig. 2, finish the serial communication of central processing unit circuit U 4 and Atmeg16 single-chip microcomputer among Fig. 2, the control command of The Cloud Terrace and camera lens is by the Master Control Center wireless transmission, behind the node wireless receiving, after resolving by 4 pairs of control commands of central processing unit circuit U among Fig. 2, communication interface by central processing unit circuit U 4 among single-chip microcomputer and Fig. 2 is transferred to single-chip microcomputer, finally carries out control action by single-chip microcomputer.

As shown in Figure 4, the motor-drive circuit of the PTZ controller of gamma camera is that U2, U3 and Resistor-Capacitor Unit that some are necessary are formed by nucleus module.U2, U3 are that the special-purpose segmentation of two-phase stepper motor chip for driving A3979 constitutes corresponding subdivision driver, the wherein horizontal side-to-side movement of U2 control The Cloud Terrace, the 3rd pin of U2 is the direction control pin, be connected with 50 pin of U1 among Fig. 3, the stepping of U2 is controlled input pin 19 pin and is connected with 51 pin of U1 among Fig. 3, step mode selects pin 12,13 pin to be connected respectively with 37,38 pin of U1 among Fig. 7, is used for step mode and selects; In like manner, the vertical up-or-down movement of U3 control The Cloud Terrace, the 3rd pin of U3 is the direction control pin, be connected with 48 pin of U1 among Fig. 3, the stepping of U3 is controlled input pin 19 pin and is connected with 49 pin of U1 among Fig. 3, step mode selects pin 12,13 pin to be connected respectively with 39,40 pin of U1 among Fig. 7, is used for step mode and selects.

As shown in Figure 5, the PTZ controller of gamma camera is used for aperture, focusing, doubly three direct current machines enforcement controls of change to zoom lens to the control circuit of camera lens.Mainly select an integrated circuit (model: 4555) U4, U5, U6, optocoupler B1, B2, B3, B4, inverter (model: MC1413), P type ditch FET power tube and N type ditch FET power tube constitute push-pull type power drive, metal oxide piezo-resistance R29, R36, R43 and form as instantaneous absorption protector and Resistor-Capacitor Unit that some are necessary by two four.M1, M2 and M3 are the direct current machines of 12V power supply, and the aperture, focusing, the change that are used for zoom lens are doubly controlled.47 pin of U1 directly link to each other with 46 pin among described two four the 1st, 2 pin that select an integrated circuit U4 and Fig. 3; 45 pin of U1 directly link to each other with 44 pin among described two four the 1st, 2 pin that select an integrated circuit U5 and Fig. 3, and 35 pin of U1 directly link to each other with 36 pin among described pair four the 1st, 2 pin that select an integrated circuit U6 and Fig. 3.

As shown in Figure 6, command centre's monitoring and scheduling computer is a core with built-in industrial mainboard U1, make up by the expansion peripheral hardware, serial communication interface U2, Ethernet interface U6,802.11b wireless communication interface U5 term extended wireless network interface card, the camera U3 of band USB interface is by the video image of USB interface U4 collection site, VGA video output U7 links to each other with LCD U13, be used for man-machine interaction, DMA interface U8 links to each other with portable hard drive U14, and DIMM interface 9 links to each other with DDR266 internal memory 16, power interface U10 links to each other with switching power unit U16, be used for system power supply, audio interface U12 attacks by audio frequency to be put U17 and links to each other with loudspeaker U18, is used for the output of audio frequency, and audio interface U12 directly links to each other with microphone U19, is used for the audio frequency input.

As shown in Figure 7, described strong Sink node 22 is made up of built-in industrial mainboard P1, Switching Power Supply P2, memory modules P3, CF interface wireless Wlan card P4, portable hard drive P5, GPS module P6, satellite data transceiver module P7,485 communication module P8, LCD display module P9, described built-in industrial mainboard, selected model is that the EC5-1719CLDNA that the company of raising produces is ground in Taiwan, its characteristics are low in energy consumption, volume Xiao He rich interface, and CPU is a double-core; Described Switching Power Supply P 2 directly links to each other with the Power interface of built-in industrial mainboard P1; (model: DDR266) the DIMM interface of built-in industrial mainboard P1 links to each other described memory modules P3, and capacity is 1G; Described CF interface wireless Wlan card P4 directly links to each other with the CF interface of built-in industrial mainboard P1, supports the 802.11b communication standard; Described portable hard drive P5 directly links to each other with the DMA interface of built-in industrial mainboard P1, is used for installing operating system software and application software and preserves data; Described GPS module P6 interconnects by the RS232 interface of mainboard; Described satellite data transceiver module P7 directly links to each other with the USB interface of mainboard, is used for the on-the-spot significant data of long-range transmission to higher level department; Described 485 communication module P8 directly link to each other with the serial communication interface of built-in industrial mainboard P1, are used to dispose the required communication interface of strong Sink node; Described LCD display module P9 links to each other with the VGA interface of built-in industrial mainboard P1, is used to show the human-machine interactive information of strong Sink node when configuration.

As shown in Figure 8, the broadband self-organizing sensor network network system of wireless audio and video transfer function is controlled and had to described can the realization to video camera swing and convergent-divergent, the topological relation of spot sensor network node and the foundation of communication link are finished by high-rise custom protocol, and embodiment and step are as follows:

(each node one of step 1) powers on and moves a program of setting up the topological sum link, at first send a Topology Discovery frame, this frame comprises destination address, and to be strong Sink address of node, source address be the address, hop count device, age field (initial value is 60-255 second) of self, information field 7FFH end to end.See Table 1.

Table 1 frame format

?7FH

Source address

Destination address

?Hop

Age

Adr1

Adr2

7FFH

(step 2) is when Topology Discovery frame process intermediate node, the hop count device of Topology Discovery frame adds 1 automatically, and oneself node address is attached in this frame, this intermediate node continues this Topology Discovery frame of broadcasting, when the count value of this Topology Discovery frame hop count device of broadcasting greater than 2 the time, or age Age field is 0 o'clock, and intermediate node then abandons this frame.

(when step 3) Topology Discovery frame arrives strong Sink node, whether hop count field and age field that strong Sink node extracts this frame be legal, if it is legal then extract destination address and intermediate node Adr1 and Adr2 address, set up this frame and carry the described communication link address date of destination address table, as shown in table 2.

Table 2 communication link address date table

(the strong Sink node of step 4) sends to each spot sensor node with the communication link address date table of setting up by polling mode, and the communication link address date table of oneself is preserved and write down to the spot sensor node, is used for follow-up audio frequency and video communication.

Through above-mentioned 4 steps, build the network of multi-level topology and each sensor node and communication link between the Sink node by force between live video audio sensor node and the strong Sink node.

As shown in Figure 9, the monitoring software main functional modules has 10, and the coding and decoding video module is mainly finished based on the real-time video Code And Decode of standard H.264; Sound is looked coding/decoding module mainly based on the Code And Decode of audio frequency of suggestion G.728; Point-to-point video intercom mainly is Master Control Center and certain on-the-spot internodal face-to-face communication; The multi-channel video communication module mainly be Master Control Center the poll switching mode receive the live video picture that the spot sensor node transmits, support the demonstration of 4 road pictures simultaneously, speed is 2-3 frame/second/road; Emergency call function is mainly finished on-the-spot certain node is initiated the active voice call function, and back-stage management is mainly finished spot sensor number of nodes, strong Sink node parameter configuration and quantity and the internodal communication mode of strong Sink are selected management; The configuration management of system mainly finish system communication interface selection, messaging parameter configuration, on-the-spot address of node mapping management, voice suggestion is mainly finished Master Control Center on-the-spot node is broadcasted the emergency scheduling instruction; The audio/video flow that the handover management of communication is mainly finished on-the-spot node transfers to Master Control Center effectively according to the order of importance and emergency of the on-the-spot state of affairs, is convenient to command scheduling and decision-making.

Be the reliable transmission of audio, video data, at the self-defining audio, video data host-host protocol of high level, data packet format such as table 3.

Table 3 data packet format

?7FH

Source address

Destination address

?Hop

Age

Adr1

Adr2

Type of service

Control command

Data field

Check digit

7FFH

7FH in the table 3: respectively account for 1 byte end to end at whole packet; Source address: expression sends the sender of data service, takies 2 bytes; Destination address: expression sends the recipient of data service, takies 2 bytes; Hop: expression arrive the destination the number of intermediate node of process, do not add 1 through a node counts value with, the native system maximum is 2, above 2 o'clock, receives that any node of this packet all will abandon this packet, takies 1 byte; Age: in the life-span of expression packet, it is set to 60 seconds-255 seconds system, when surpassing the value of setting, receives that any node of this packet all will abandon this packet, takies 1 byte; Adr1: packet arrive destination address must through the address of intermediate node, the time spent is not set to OFFH, takies 2 bytes; Adr2: packet arrive destination address must through the address of intermediate node, the time spent is not set to OFFH, takies 2 bytes;

Type of service: represent this packet encapsulation be video traffic the time, its value is for 01H, audio service, its value is 02H, takies 1 byte.

Control command: the expression system sets up topology, communication link, audio frequency and video communication, keeps and report more required session command such as switching of link connection status, system's operation function, takies 1 byte;

Data field: be used to encapsulate audio, video data, variable-length, but be limited in the 32K in maximum length; Check digit: only source address, destination address, Hop, Age, Adr1, Adr2, type of service, control command are carried out the CRC cyclic redundancy check (CRC), take 2 bytes;

Claims (4)

1, a kind of video camera swing and the controlled audio-video wireless transmission equipment of convergent-divergent, it is characterized in that this network system is by first node (1), Section Point (2), the 3rd node (3), the 4th node (4), the 5th node (5), the 6th node (6), the 7th node (7), audio sensor network (I) is looked at the 8th node (8) and a strong Sink node (22) composition scene, described first node (1), Section Point (2), the 3rd node (3), the 4th node (4), the 5th node (5), the 6th node (6), interconnect by the 2.4GHz radio frequency wireless link between the 7th node (7) and the 8th node (8) and between each node and the strong Sink node (22), each node operation IPV6 agreement

Main frame (31), display (32), wireless network card (33), keyboard (34), loudspeaker (35) and audio amplifier (36) constitute center monitoring dispatching system (II), described display (32) inserts the VGA interface of main frame (31) by the VGA cable, wireless network card (33) directly links to each other with the USB interface of main frame (31), keyboard (34) directly links to each other with another USB interface of main frame (31), and loudspeaker (35) directly link to each other with the MIC interface with the Speaker interface of main frame (31) with audio amplifier;

Wireless network card (33) in the center monitoring dispatching system (II) is directly set up the physical connection of communicating by letter with strong Sink node (22) wireless connections that the scene is looked in the audio sensor network (I), and center monitoring dispatching system (II) implements management by strong Sink node (22) to wireless multimedia sensor network node and the resource laid.

2, video camera swing according to claim 1 and the controlled audio-video wireless transmission equipment of convergent-divergent, it is characterized in that described first node (1), Section Point (2), the 3rd node (3), the 4th node (4), the 5th node (5), the 6th node (6), the 7th node (7), the 8th node (8) hardware component units is the same with physical structure, by phase lock circuitry (U1), audio coding decoding circuit (U2), audio frequency input/output interface (J2), video coding circuit (U3), central processing unit circuit (U4), FPGA circuit (U5), 802.11b wireless communication module (U6) unit module is formed;

Wherein the model of 802.11b wireless communication module (U6) is TNET110B, and the selected circuit model of phase lock circuitry (U1) is PLL1708, and the selected model of audio coding decoding circuit (U2) is TMS320AIC23b; The two-way pulse clock signal that phase lock circuitry (U1) produces is exported by 2 pin and 3 pin of phase lock circuitry (U1) respectively, and directly links to each other with 3 pin with 2 pin of audio coding decoding circuit (U2), provides required clock signal to voicefrequency circuit; The audio frequency output pin of audio coding decoding circuit (U2) is 12 pin and 13 pin, respectively by forming filter circuit by the 4th electric capacity (C4) and the 7th resistance (R7), the 6th electric capacity (C6) and the 8th resistance (R8), and link to each other the output stereo audio respectively with audio frequency input/output interface (J2) with the 13 current-limiting resistance (R13) through the 12 current-limiting resistance (R12); The filter circuit that current-limiting resistance (R14), the 9th resistance (R9) and the tenth electric capacity (C10) are formed is passed through in the audio frequency input respectively, the filter circuit that the 15 current-limiting resistance (R15), the 9th resistance (R10) and the 11 electric capacity (C11) are formed is imported 19 pin and 20 pin of audio coding decoding circuit (U2) more respectively through the 7th capacitance (C7) and the 8th capacitance (C8); The video inputs process is by inductor (L1), filter circuit that first electric capacity (C1) and the 5th electric capacity (C5) are formed and the 5th resistance (R5) and the 9th electric capacity (C9) are formed the 10 pin input of RC filter from video encoder (U3), 3 pin of audio coding decoding circuit (U2), 4 pin, 5 pin, 6 pin, 7 pin respectively with the AD14 pin of CPU (U4), the AC14 pin, the Ab14 pin, the AC9 pin, the AD10 pin links to each other, CPU (U4) is selected the high-end dsp chip of TI company, its model is DMA642, its data/address bus VPID9-VPID2 directly links to each other with the XPD0-XPD7 of video encoder (U3), the SCL of central processing unit circuit (U4) directly directly links to each other with the SDA pin with the SCL of video encoder (U3) with the SDA pin, be used for the initial configuration of central processing unit circuit (U4) to video encoder (U3), it is the chip of EP1C6Q240C8 that FPGA circuit (U5) is selected model for use, mainly finish the generation of the described clock signal of system, 3 of FPGA circuit (U5), 4,5,64 pin respectively with central processing unit circuit (U4) /CE0, / BE0, / BE1, / EA204 signal pins directly connects, 11 of FPGA circuit (U5), 12 pin respectively with 7 pin of 802.11b wireless communication module (U6), 12 pin directly link to each other, 802.11b 58 pin of wireless communication module (U6), 16 pin, 21 pin, 61 pin, 60 pin respectively with the general input and output pin GPIO8 pin of central processing unit circuit (U4), the GPIO7 pin, read signal/OE pin, write signal/WE pin, standby ready signal/RDY pin is connected with general input and output pin GPIO9 pin, 802.11b 16 bit address line A0-A15 of wireless communication module (U6) link to each other with the address wire EA3-EA18 of central processing unit circuit (U4) respectively, 16 position datawires of 802.11b wireless communication module (U6) directly link to each other with the data wire ED0-ED15 of central processing unit circuit (U4) respectively; PTZ controller central processing circuit is selected the Atmeg16 single-chip microcomputer for use; 6 I/O pin of 8 I/O pin of the PA mouth of this single-chip microcomputer and PC mouth are respectively applied for the action of control The Cloud Terrace and camera lens; 27 pin of this single-chip microcomputer directly link to each other with the AE16 pin with the AC16 of central processing unit circuit (U4) with 28 pin; finish the serial communication of central processing unit circuit (U4) and Atmeg16 single-chip microcomputer; what the motor-drive circuit of PTZ controller was selected for use is that the special-purpose segmentation of two-phase stepper motor chip for driving A3979 constitutes corresponding subdivision driver; control about the The Cloud Terrace level and vertical up-or-down movement, be used for aperture zoom lens; focus on; the circuit that becomes doubly three direct current machine enforcement controls selects 4555 pairs four of integrated circuits to select an integrated circuit (U4) by two four; two four select an integrated circuit (U5); two four select an integrated circuit (U6); first optocoupler (B1); second optocoupler (B2); the 3rd optocoupler (B3); the 4th optocoupler (B4); inverter MC1413; P type ditch FET power tube and N type ditch FET power tube constitute the push-pull type power drive; metal oxide piezo-resistance (R29; R36; R43) form as instantaneous absorption protector.

3, video camera swing according to claim 1 and the controlled audio-video wireless transmission equipment of convergent-divergent, it is characterized in that the center monitoring dispatching is a core with built-in industrial mainboard (U1), make up by the expansion peripheral hardware, serial communication interface (U2), Ethernet interface (U6), 802.11b wireless communication interface (U5) term extended wireless network interface card, the camera (U3) of band USB interface is by the video image of USB interface (U4) collection site, VGA video output (U7) links to each other with LCD (U13), be used for man-machine interaction, DMA interface (U8) links to each other with portable hard drive (U14), DIMM interface (9) links to each other with DDR266 internal memory (16), power interface (U10) links to each other with switching power unit (U16), be used for system power supply, audio interface (U12) is attacked by audio frequency and is put (U17) and link to each other with loudspeaker (U18), is used for the output of audio frequency, and audio interface (U12) directly links to each other with microphone (U19), is used for the audio frequency input.

4, video camera according to claim 1 swing and the controlled audio-video wireless transmission equipment of convergent-divergent is characterized in that described strong Sink node (22) is made up of built-in industrial mainboard (P1), Switching Power Supply (P2), memory modules (P3), CF interface wireless Wlan card (P4), portable hard drive (P5), GPS module (P6), satellite data transceiver module (P7), 485 communication modules (P8), LCD display module (P9); Described built-in industrial mainboard, selected model are that the EC5-1719CLDNA that the company of raising produces is ground in Taiwan, and CPU is a double-core; Described Switching Power Supply (P2) directly links to each other with the Power interface of built-in industrial mainboard (P1); Described memory modules (P3) model is DDR266, links to each other with the DIMM interface of built-in industrial mainboard (P1), and capacity is 1G; Described CF interface wireless Wlan card (P4) directly links to each other with the CF interface of built-in industrial mainboard (P1), supports the 802.11b communication standard; Described portable hard drive (P5) directly links to each other with the DMA interface of built-in industrial mainboard (P1), is used for installing operating system software and application software and preserves data; Described GPS module (P6) interconnects by the RS232 interface of mainboard; Described satellite data transceiver module (P7) directly links to each other with the USB interface of mainboard, is used for the on-the-spot significant data of long-range transmission to higher level department; Described 485 communication modules (P8) directly link to each other with the serial communication interface of built-in industrial mainboard (P1), are used to dispose the required communication interface of strong Sink node; Described LCD display module (P9) links to each other with the VGA interface of built-in industrial mainboard (P1), is used to show the human-machine interactive information of strong Sink node when configuration.

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