CN1618484A - Visual command equipment for mine rescue - Google Patents
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- CN1618484A CN1618484A CN 200410073295 CN200410073295A CN1618484A CN 1618484 A CN1618484 A CN 1618484A CN 200410073295 CN200410073295 CN 200410073295 CN 200410073295 A CN200410073295 A CN 200410073295A CN 1618484 A CN1618484 A CN 1618484A
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Abstract
A visualized command system for mine rescue is composed of front-end unit, base unit, relay unit, ground unit, twisted-pair telephone line for high-speed duplex digital signal transmission, power supply and portable infrared camera.
Description
Technical field
The present invention relates to mine safety disaster relief field, relate in particular to a kind of visual command equipment for mine rescue.
Prior art
During mine generation disaster, the rescue personnel is the general a kind of SC2000 type radio telephone that uses wired sound-powered phone or use South Africa to introduce in the disaster relief of down-hole, but because special disaster environment, exist the interference of flammable explosive gas such as harmful gas, coal gas, the rescue team member need equip self-insurance equipment.Existing self-insurance equipment generally adopts negative pressure device or positive pressure respirator, adopts negative pressure device, and the team member can come off or the incoming call environmental gas that speaks because of nose clip, so can only lean on the information of sound-powered phone transmission agreement; Though adopt positive pressure respirator to improve the comfortableness and the security of breathing, can talk, because the obstruct of face shield influence also is difficult to make clear.Therefore, no matter use wired sound-powered phone or radio telephone, all can't transmit the various information such as sound, image in disaster area clear, exactly, the actual conditions in reflection disaster area.Simultaneously, because Minepit environment gas is inflammable and explosive when disaster takes place, the existing communication apparatus with superperformance can't normally use, and makes down-hole disaster relief speech communication accuracy, real-time poor, and information content is limited, does not have memory, storage and image transmission function.When having an accident, the existing communication in colliery, surveillance can't be used safely, and be in paralyzed state substantially.The feedback information that these problems directly cause existing mine disaster relief equipment to exist between rescue team member and higher level commander, the coordination personnel is not smooth, rescue base, down-hole and ground accident rescue command can't in time, accurately grasp the disaster area truth, command system can not be made the scheduling and the fast reaction of science in the disaster relief process, its rescue work is restricted, affected possible rescue chance adversely, even cause bigger disaster, cause bigger casualties and property loss.
Summary of the invention
For solving the problem that exists in the mine rescue work, the object of the present invention is to provide a kind of visual command equipment for mine rescue that can monitor in real time and directly get in touch with the scene of the accident.This device can carry out image scene, sound the digital data transmission of bi-directional symmetrical high speed clear, exactly by mining telephone wire, base, rescue command center, ground are given first aid in real-time Transmission to down-hole, the two-way call in many ways of scene, base, down-hole and ground rescue center after the multiple spot supervision of realization scene of the accident image and the calamity.
For achieving the above object, the present invention realizes with following technical scheme: the mining twisted pair telephone line that it comprises headend equipment, base equipment, trunking, ground installation and can realize the transmission of bi-directional symmetrical high-speed digital signal; Headend equipment mainly is made up of mine intrinsic safety infrared video camera, headset, audio-video network sensor, Symmetric Digital Subscriber Line AM access module and intrinsic safety electric source, base equipment mainly is made up of the multiplexing AM access module of Symmetric Digital Subscriber Line, down-hole digital information terminal and intrinsic safety electric source, trunking mainly comprises the relaying converter, and ground installation mainly comprises data electrical-optical-electricity exchange isolation module, Symmetric Digital Subscriber Line AM access module, computer and intrinsic safety electric source; Intrinsic safety infrared video camera and headset are delivered to the audio-video network sensor together with the video and audio signal that captures, the audio-video network sensor is with the audio frequency of simulation, vision signal is delivered to Symmetric Digital Subscriber Line AM access module with compressed encoding after converting data signal to, data after Symmetric Digital Subscriber Line AM access module will be compressed are modulated, its modulation signal sends the multiplexing AM access module of Symmetric Digital Subscriber Line of base equipment to the form of network packet by mining twisted pair telephone line, the video/audio signal in the video/audio signal of base equipment receiving front-end equipment or the base of reception rescue simultaneously, the video/audio signal of headend equipment exports down-hole digital information terminal reduction voice to through the multiplexing AM access module of Symmetric Digital Subscriber Line, picture signal is also stored data, or simultaneously with the video/audio signal of rescuing the base, by existing telephone line in down-hole or mining twisted pair telephone line, after amplifying signal, the relaying converter exports ground data electrical-optical-electricity exchange isolation module to, its ground data electrical-optical-electricity exchange isolation module is sent down-hole intrinsicallysafecircuit and land circuit isolation back signal into Symmetric Digital Subscriber Line AM access module decoding, and a user side interface is provided, with the computer observation signal or by the quick Ethernet interface high-speed uploading of self adaptation.
Above-mentioned audio-video network sensor comprises that video acquisition encoder, audio coding/decoding device, DSP look audio compression processor, Data Control, buffer memory FPGA module and data and seal processor up for safekeeping; The video acquisition encoder converts the simulation video/audio signal of infrared video camera output to data signal, deliver to DSP by the parallel output terminal oral instructions and look the audio compression processor, the audio coding/decoding device is finished the coding work of analogue audio frequency to DAB, outputs to DSP and looks the audio compression processor; Described audio coding/decoding device also receives the DAB of looking the audio compression processor from DSP simultaneously, carry out the decoding work of DAB to analogue audio frequency, DSP looks the audio compression processor and carries out the video coding, form high efficiency encoded video streams, carry out the audio coding compression, form low code stream digital voice data and synchronous transfer; Buffer memory FPGA module provides Data Control and data buffer memory for DSP looks the operation of audio compression processor program, the network data flow of the video/audio data flow encapsulation after data are sealed processor up for safekeeping and will be encoded, packing formation standard transmits through Symmetric Digital Subscriber Line AM access module.
Above-mentioned Symmetric Digital Subscriber Line AM access module comprises power circuit, bridge interface circuit, transceiver circuit, transceiver control circuit and interface circuit; The data that the bridge interface circuit is sent here the audio-video network sensor are divided into groups to pack and are handled, directly send into transceiver circuit with the lan interfaces compatibility, transceiver circuit real-time listening and Processing Interface circuit are from the modulation signal that transmits on the described mining twisted-pair feeder, the signal that receives is carried out preliminary treatment amplification, echo adaptive cancellation, digital extraction and error correction decoding to be handled, according to being provided with of processor in the transceiver circuit, outputing to the bridge interface circuit and carry out network and transmit recovering data processings of packing; The transceiver control circuit is finished the control to transceiver mode of operation, data transmit-receive form, and finishes the data transaction between symmetric digital subscriber line and the communication network protocol; Described interface circuit is made up of build-out resistor network and transformer, realizes the impedance matching between transmission line and bridge interface circuit and the symmetric digital subscriber line transceiver circuit.
The present invention compared with prior art, be an independence, the small-sized local side data equipment of complete function, it relies on power autonomous, safety such as portable intrinsic safety infrared video camera, headend equipment easily, adopt the wide-band networking technology of " promptly the shop is promptly used ", utilize a pair of mining twisted pair telephone line to carry out bi-directional symmetrical digital data transmission at a high speed, on-the-spot sound and image after the calamity are given first aid to the base by telephone wire real-time Transmission to down-hole, rescue command center, ground, mine rescue command centre of country, the multiple spot of realizing scene of the accident image monitors, and it is on-the-spot after the calamity, in many ways the two-way call of base, down-hole and ground rescue center realizes the real time record and the playback of disaster relief overall process.Therefore, use the present invention to have characteristics real-time, accurate, multi-faceted, rapidly and efficiently.
Description of drawings
Fig. 1 forms the structural principle block diagram for the present invention;
Fig. 2 looks sound intermediate frequency network sensor circuit structure theory diagram for the present invention;
Fig. 3 is Symmetric Digital Subscriber Line access module circuit structural principle block diagram among the present invention.
Below in conjunction with accompanying drawing the present invention is done explanation in further detail:
The specific embodiment
Referring to Fig. 1: the mining twisted pair telephone line that this device comprises headend equipment I, base equipment II, trunking III, ground installation IV and can realize the transmission of bi-directional symmetrical high-speed digital signal.Headend equipment I is carried at the scene by the rescue team member, and base equipment II is arranged on the downhole rescuing base, and the downhole rescuing base also can be provided with headend equipment I simultaneously, and ground installation IV is located at ground command center.
Headend equipment I mainly by the mine intrinsic safety infrared video camera 1., headset 2., the audio-video network sensor 3., 5. 4. Symmetric Digital Subscriber Line AM access module form with intrinsic safety electric source, 5. its intrinsic safety electric source uses provides the lithium power supply for oneself.The headend equipment I here can be provided with single channel or multichannel according to the concrete condition of on-the-spot disaster spot, and existing is example with 3 the tunnel: two-way is located at the different scenes of the accident respectively, and one the tunnel is located at the rescue base.Base equipment II mainly by the multiplexing AM access module of Symmetric Digital Subscriber Line 6., 5. 7. down-hole digital information terminal form with intrinsic safety electric source, 8. trunking III mainly comprises the relaying converter, ground installation IV mainly comprise data electrical-optical-electricity exchange isolation module 9., Symmetric Digital Subscriber Line AM access module 4., computer 10. with intrinsic safety electric source 5..
1. portable mine intrinsic safety infrared video camera adopts a set of equipment after the improvement, its infrared wavelength: 850nm, Lighting Distance: 〉=10m, 500 (level) * 582 (vertically) pixels, horizontal definition: 300 tv lines, it can catch the down-hole image scene automatically under complete black situation.Deliver to the audio-video network sensor 3. with capturing on-the-spot vision signal and the headset audio signal in 2., its audio-video network sensor is 3. at first with the audio frequency of simulating, vision signal converts data signal to, adopt the MPEG-4 compress mode to carry out compressed encoding then, again 4. compressed encoding is delivered to Symmetric Digital Subscriber Line AM access module, the modulation system of The data 2BIQ after 4. Symmetric Digital Subscriber Line AM access module will be compressed transmits, because of the distance between headend equipment I and the base equipment II less than 1000 meters, directly the multiplexing AM access module of Symmetric Digital Subscriber Line that sends base equipment II to the form of IP bag by mining twisted pair telephone line is 6..Be Symmetric Digital Subscriber Line AM access module 4. and the distance between the multiplexing AM access module 6. of Symmetric Digital Subscriber Line≤1 km, the modulating-coding data signal can reach the symmetrical rate of 2.3Mb/s in the distance of 1 km by the telephone wire in a pair of 0.5mm line footpath, and stable performance, noise resisting ability is strong, can reach DDN special line quality.
Base equipment II can receive the two-way video/audio signal of different scene of the accident headend equipment I and the video/audio signal in one tunnel rescue base simultaneously, and 6. the two-way video/audio signal of headend equipment I exports digital information terminal reduction voice, the picture signal in downhole rescuing base to and store data through the multiplexing AM access module of Symmetric Digital Subscriber Line.Add one road video/audio signal in rescue base self, transmit by the existing telephone line in down-hole behind synthetic one road signal of totally three road signals, because of the distance between base equipment II and the headend equipment I greater than 2000 meters, need after 8. the relaying converter amplifies signal, to export ground data electrical-optical-electricity again to and exchange isolation module 9., 9. its ground data electrical-optical-electricity exchange isolation module is sent signal after down-hole intrinsicallysafecircuit and the land circuit isolation into Symmetric Digital Subscriber Line AM access module earlier and is 4. decoded, and provide a RJ45 user side interface, with 10. observation signal or of computer by the quick Ethernet interface high-speed uploading of the 10M/100M self adaptation that provides, real-time Transmission realizes that the multiple spot of scene of the accident image monitors and the disaster scene to rescue command center, ground or national mine rescue command centre, in many ways the two-way call of base, down-hole and ground rescue center.
Referring to Fig. 2: mainly finish video/audio signal collection, processing, compression and synthetic when 3. the audio-video network sensor among apparatus of the present invention headend equipment I works, its circuit comprises that video acquisition encoder (11), audio coding/decoding device (12), DSP look audio compression processor (13), Data Control, buffer memory FPGA module (14) and data and seal processor (15) up for safekeeping; The simulation video/audio signal that video acquisition encoder (11) is 1. exported infrared video camera converts data signal to, and form a data format and deliver to DSP by the parallel output terminal oral instructions and look audio compression processor (13), audio coding/decoding device (12) is finished the coding work of analogue audio frequency to DAB, outputs to DSP and looks audio compression processor (13); Described audio coding/decoding device (12) also receives the DAB of looking audio compression processor (13) from DSP simultaneously, carry out the decoding work of DAB to analogue audio frequency, DSP looks audio compression processor (13) and carries out MPEG-4 video coding, form high efficiency encoded video streams, carry out G.729 audio coding compression, form low code stream digital voice data and synchronous transfer; Buffer memory FPGA module (14) provides Data Control and data buffer memory for DSP looks the operation of audio compression processor (13) program, data are sealed the video/audio Apple talk Data Stream Protocol Apple Ta encapsulation after processor (15) will be encoded, the network data flow of packing formation standard up for safekeeping, 4. transmit through Symmetric Digital Subscriber Line AM access module.The user can from the computer of any All-China Federation of Taiwan Compatriots net browse camera acquisition to image, hear on-the-spot voice; Also can carry out parameter adjustment to the IP encoder, for example Bian Ma frame per second, code efficiency, picture quality, IP address setting etc. by the order of internet transmission.Data are sealed processor up for safekeeping needs each one of SDRAM and FLASH to be used for the program of storage running.
Referring to Fig. 3: 4. the Symmetric Digital Subscriber Line AM access module in apparatus of the present invention mainly finish symmetric digital subscriber line broadband video/audio transformation task, and its circuit mainly comprises power circuit A, bridge interface circuit B, transceiver circuit C, transceiver control circuit D and interface circuit E.
Here power circuit A is a DC power supply circuit, is the 5V voltage that is produced system works by the 12V input voltage, and the required 3.3V voltage of bridge interface circuit B and transceiver circuit C is produced through the three-terminal voltage-stabilizing circuit by 5V voltage.The data that 3. its bridge interface circuit B sends here the audio-video network sensor according to 802.3 standards are divided into groups to pack and are handled, directly send into transceiver circuit C with the lan interfaces compatibility of 10/100Mbps, transceiver circuit C real-time listening and Processing Interface circuit E are from the 2B1Q modulation signal that transmits on the described mining twisted-pair feeder, the signal that receives is carried out preliminary treatment to be amplified, the echo adaptive cancellation, digital extraction and error correction decoding are handled, according to being provided with of processor among the transceiver circuit C, outputing to bridge interface circuit B and carry out Wide Area Network and transmit recovering data processings of packing; Described transceiver control circuit D finishes the control to transceiver mode of operation, data transmit-receive form, and finishes the data transaction between symmetric digital subscriber line and the IEEE802.3 agreement; Described interface circuit E is made up of build-out resistor network and transformer, realizes the impedance matching between transmission line and bridge interface circuit B and the symmetric digital subscriber line transceiver circuit C.
Power circuit A in the multiplexing AM access module 6. of Symmetric Digital Subscriber Line in being provided with above-mentioned Symmetric Digital Subscriber Line AM access module 4., bridge interface circuit B, transceiver circuit C, transceiver control circuit D and the interface circuit E, also be provided with and adopt the power board of time-division multiplex technology synthetic one road signal of multichannel video/audio signal.
Claims (6)
1, a kind of visual command equipment for mine rescue is characterized in that the mining twisted pair telephone line that it comprises headend equipment I, base equipment II, trunking III, ground installation IV and can realize the transmission of bi-directional symmetrical high-speed digital signal; Described headend equipment I mainly by the intrinsic safety infrared video camera 1., headset 2., the audio-video network sensor 3., 5. 4. Symmetric Digital Subscriber Line AM access module form with intrinsic safety electric source, described base equipment II mainly by the multiplexing AM access module of Symmetric Digital Subscriber Line 6., 5. 7. down-hole digital information terminal form with intrinsic safety electric source, 8. described trunking III mainly comprises the relaying converter, described ground installation IV mainly comprise data electrical-optical-electricity exchange isolation module 9., Symmetric Digital Subscriber Line AM access module 4., computer 10. with intrinsic safety electric source 5.; 3. 2. 1. described intrinsic safety infrared video camera deliver to the audio-video network sensor with the video and the audio signal that capture together with headset, described audio-video network sensor is 3. with the audio frequency of simulating, 4. vision signal delivers to Symmetric Digital Subscriber Line AM access module with compressed encoding after converting data signal to, data after 4. described Symmetric Digital Subscriber Line AM access module will be compressed are modulated, the multiplexing AM access module of Symmetric Digital Subscriber Line that its modulation signal sends base equipment II to the form of network packet by described mining twisted pair telephone line 6., the video/audio signal in the video/audio signal of base equipment II receiving front-end equipment I or the base of reception rescue simultaneously, 6. the video/audio signal of headend equipment I exports down-hole digital information terminal reduction voice to through the multiplexing AM access module of Symmetric Digital Subscriber Line, picture signal is also stored data or is passed through existing telephone line in down-hole or described mining pair of hinge telephone wire with the video/audio signal of giving first aid to the base simultaneously, after 8. the relaying converter amplifies signal, export ground data electrical-optical-electricity to and exchange isolation module 9., 9. its ground data electrical-optical-electricity exchange isolation module is sent signal after down-hole intrinsicallysafecircuit and the land circuit isolation into Symmetric Digital Subscriber Line AM access module and is 4. decoded, and a user side interface is provided, with 10. observation signal or of computer by the quick Ethernet interface high-speed uploading of self adaptation.
2, a kind of visual command equipment for mine rescue according to claim 1 is characterized in that 3. described audio-video network sensor comprises that video acquisition encoder (11), audio coding/decoding device (12), DSP look audio compression processor (13), Data Control, buffer memory FPGA module (14) and data and seal processor (15) up for safekeeping; The simulation video/audio signal that video acquisition encoder (11) is 1. exported infrared video camera converts data signal to, deliver to DSP by the parallel output terminal oral instructions and look audio compression processor (13), audio coding/decoding device (12) is finished the coding work of analogue audio frequency to DAB, outputs to DSP and looks audio compression processor (13); Described audio coding/decoding device (12) also receives the DAB of looking audio compression processor (13) from DSP simultaneously, carry out the decoding work of DAB to analogue audio frequency, DSP looks audio compression processor (13) and carries out the video coding, form high efficiency encoded video streams, carry out the audio coding compression, form low code stream digital voice data and synchronous transfer; Buffer memory FPGA module (14) provides Data Control and data buffer memory for DSP looks the operation of audio compression processor (13) program, data are sealed the video/audio data flow encapsulation after processor (15) will be encoded, the network data flow of packing formation standard up for safekeeping, 4. transmit through Symmetric Digital Subscriber Line AM access module.
3, a kind of visual command equipment for mine rescue according to claim 1 is characterized in that 4. described Symmetric Digital Subscriber Line AM access module comprise power circuit A, bridge interface circuit B, transceiver circuit C, transceiver control circuit D and interface circuit E; The data that 3. described bridge interface circuit B sends here the audio-video network sensor are divided into groups to pack and are handled, directly send into transceiver circuit C with the lan interfaces compatibility, transceiver circuit C real-time listening and Processing Interface circuit E are from the modulation signal that transmits on the described mining twisted-pair feeder, the signal that receives is carried out preliminary treatment amplification, echo adaptive cancellation, digital extraction and error correction decoding to be handled, according to being provided with of processor among the transceiver circuit C, outputing to bridge interface circuit B and carry out network and transmit recovering data processings of packing; Described transceiver control circuit D finishes the control to transceiver mode of operation, data transmit-receive form, and finishes the data transaction between symmetric digital subscriber line and the communication network protocol; Described interface circuit E is made up of build-out resistor network and transformer, realizes the impedance matching between transmission line and bridge interface circuit B and the symmetric digital subscriber line transceiver circuit C.
4, a kind of visual command equipment for mine rescue according to claim 1, it is characterized in that the power circuit A in being provided with described Symmetric Digital Subscriber Line AM access module 4. in the multiplexing AM access module 6. of described Symmetric Digital Subscriber Line, bridge interface circuit B, transceiver circuit C, transceiver control circuit D and the interface circuit E, also be provided with and adopt the power board of time-division multiplex technology synthetic one road signal of multichannel video/audio signal.
5, a kind of visual command equipment for mine rescue according to claim 1 is characterized in that described headend equipment I can be provided with single channel or multichannel as required.
6, a kind of according to claim 1 or 5 visual command equipment for mine rescue is characterized in that 1. the intrinsic safety infrared video camera among the described headend equipment I is portable mine intrinsic safety infrared video camera, and intrinsic safety electric source is 5. for providing the lithium power supply for oneself.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100732951A CN100507215C (en) | 2004-11-19 | 2004-11-19 | Visual command equipment for mine rescue |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100732951A CN100507215C (en) | 2004-11-19 | 2004-11-19 | Visual command equipment for mine rescue |
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| CN1618484A true CN1618484A (en) | 2005-05-25 |
| CN100507215C CN100507215C (en) | 2009-07-01 |
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| CNB2004100732951A Expired - Fee Related CN100507215C (en) | 2004-11-19 | 2004-11-19 | Visual command equipment for mine rescue |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101394544B (en) * | 2007-09-21 | 2011-02-16 | 中电广通股份有限公司 | Network camera for mining |
| CN102061935A (en) * | 2011-01-10 | 2011-05-18 | 西安森兰科贸有限责任公司 | Wireless multimedia command system for mine rescue |
| CN102251806A (en) * | 2011-03-24 | 2011-11-23 | 宋德利 | Safety emergency rescue alarm command system of coal mine |
| CN102300078A (en) * | 2011-05-18 | 2011-12-28 | 北京伊格赛德救援装备有限公司 | Emergency rescue integrated communication audio and video command system |
| CN101710870B (en) * | 2009-12-01 | 2012-05-23 | 西安终南信息技术有限公司 | Access and data transmission method for mineral long reach Ethernet |
| CN103297744A (en) * | 2012-03-02 | 2013-09-11 | 江阴中科矿业安全科技有限公司 | Drill carriage working face digital video capture system based on DSP and FPGA |
| CN103686091A (en) * | 2013-12-23 | 2014-03-26 | 张兴玉 | Motorized multimedia communication emergency rescue command system |
| CN105100694A (en) * | 2014-05-20 | 2015-11-25 | 天津华宁电子有限公司 | Multifunctional mining combined sound-amplifying communication control device |
| CN117039645A (en) * | 2023-10-08 | 2023-11-10 | 常州常迪机电科技有限公司 | Protective type switch cabinet |
-
2004
- 2004-11-19 CN CNB2004100732951A patent/CN100507215C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101394544B (en) * | 2007-09-21 | 2011-02-16 | 中电广通股份有限公司 | Network camera for mining |
| CN101710870B (en) * | 2009-12-01 | 2012-05-23 | 西安终南信息技术有限公司 | Access and data transmission method for mineral long reach Ethernet |
| CN102061935A (en) * | 2011-01-10 | 2011-05-18 | 西安森兰科贸有限责任公司 | Wireless multimedia command system for mine rescue |
| CN102061935B (en) * | 2011-01-10 | 2012-09-05 | 西安森兰科贸有限责任公司 | Wireless multimedia command system for mine rescue |
| CN102251806A (en) * | 2011-03-24 | 2011-11-23 | 宋德利 | Safety emergency rescue alarm command system of coal mine |
| CN102300078A (en) * | 2011-05-18 | 2011-12-28 | 北京伊格赛德救援装备有限公司 | Emergency rescue integrated communication audio and video command system |
| CN103297744A (en) * | 2012-03-02 | 2013-09-11 | 江阴中科矿业安全科技有限公司 | Drill carriage working face digital video capture system based on DSP and FPGA |
| CN103686091A (en) * | 2013-12-23 | 2014-03-26 | 张兴玉 | Motorized multimedia communication emergency rescue command system |
| CN105100694A (en) * | 2014-05-20 | 2015-11-25 | 天津华宁电子有限公司 | Multifunctional mining combined sound-amplifying communication control device |
| CN117039645A (en) * | 2023-10-08 | 2023-11-10 | 常州常迪机电科技有限公司 | Protective type switch cabinet |
| CN117039645B (en) * | 2023-10-08 | 2023-12-05 | 常州常迪机电科技有限公司 | Protective type switch cabinet |
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| CN100507215C (en) | 2009-07-01 |
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