Chidule cha TL;DR:Makina achitetezo a makamera a CCTV kwa akontrakitala amafunika kusankha mosamala mitundu ya makamera, mawonekedwe, njira zosungira, ndi zomangamanga za netiweki. Makina ozikidwa pa IP ndi omwe amalamulira msika ndipo mawonekedwe a 4K akukhala okhazikika. Zinthu zofunika kuziganizira ndi monga kuchuluka kwa makamera, zofunikira pa mawaya, kusankha NVR/VMS, komanso kutsatira malamulo oyang'anira am'deralo. Kukhazikitsa kwanthawi zonse kwamakampani kumayambira pa $500-$2,000 pa kamera iliyonse kuphatikiza kuyiyika.

Chiyambi: Ukadaulo wa CCTV wa Chitetezo cha Malonda

Televizioni yotsekedwa (CCTV) imatanthauza makina owonera makanema omwe amatumiza zizindikiro kwa owonera ena osati kuwulutsa pagulu. Msika wapadziko lonse wa CCTV udapitilira $55 biliyoni mu 2026, ndi makamera a IP omwe adatenga gawo la msika ndi 78% malinga ndiMarketsandKufufuza kwa misikaOgwira ntchito za kontrakitala ayenera kumvetsetsa zofunikira zaukadaulo, zofunikira pakukhazikitsa, ndi kutsatira malamulo akamafotokoza njira zowunikira.

Makina amakono a CCTV amapereka zambiri kuposa kungoyang'anira chitetezo. Kusanthula kwapamwamba kumathandiza anthu kuwerengera, kuzindikira ma plate a layisensi, komanso kuzindikira kulowerera kwa mlengalenga. Kuphatikiza ndi makina owongolera mwayi wolowera ndi ma alamu kumapanga njira zonse zachitetezo.

Mitundu ndi Mapulogalamu a Kamera ya CCTV

Makamera a Dome Oyang'anira M'nyumba

Makamera a dome ali ndi mpanda wozungulira womwe umabisa komwe lenzi ikupita. Makamera awa amagwirizana ndi malo ogulitsira, malo olandirira maofesi, ndi malo ogona a hotelo. Ma dome osawonongeka amatha kupirira mphamvu zokwana ma joules 50. Kapangidwe kake kamalepheretsa kusonkhanitsa fumbi ndi kuyesa kusokoneza.

Makamera a Zipolopolo Oteteza Mzere

Makamera a zipolopolo amapereka chitetezo chowoneka bwino ndi zipinda zotetezera nyengo kuti zikhazikitsidwe panja. Makamera awa nthawi zambiri amakhala ndi kutalika kwakutali kwa focal kuti azitha kuwonera patali. Ma enclosures omwe ali ndi IP67 amateteza ku fumbi ndi madzi. Ma inflators ophatikizidwa a IR amalola kuwona usiku mpaka mamita 100 kutengera zomwe zafotokozedwa.

Makamera a PTZ Oyang'anira Mwachangu

Makamera oyenda pang'onopang'ono amapereka chithunzithunzi cha madigiri 360 chokhala ndi luso lowonera zithunzi kuyambira 20 mpaka 40. Ogwira ntchito zachitetezo amawongolera momwe kamera imayikidwira kuti itsatire anthu. Zinthu zowonera zithunzi zokha zimatsatira zokha zinthu zoyenda mkati mwa madera odziwika. Makamera a PTZ amafunikira kuyika ndi kupanga mapulogalamu ovuta kwambiri kuposa makamera okhazikika.

Miyezo ya CCTV ndi Ubwino wa Zithunzi

Zofunikira pa Network Infrastructure ndi Bandwidth

Kusintha kwa PoE ndi Kutumiza Mphamvu

Mphamvu pa Ethernet (PoE) imatumiza deta ndi mphamvu zamagetsi kudzera mu chingwe chimodzi cha Cat5e/Cat6. IEEE 802.3af imapereka 15.4W pa doko lililonse, lokwanira makamera wamba. IEEE 802.3at (PoE+) imapereka 30W pamakamera a PTZ ndi ma heater.Muyezo wa IEEE 802.3btimalola 60-90W kugwiritsa ntchito mphamvu zambiri.

Kuwerengera kwa Bandwidth ndi Kusungirako

Zofunikira pa bandwidth zimadalira resolution, frame rate, ndi compression codec. Kukanikiza kwa H.265 kumachepetsa bandwidth ndi 50% poyerekeza ndi H.264. Kamera ya 4MP pa 15fps imafuna pafupifupi 4-6 Mbps. Ma switch a netiweki amafunika mphamvu yokwanira ya backplane kuti igwire ntchito yolumikizirana ya kamera popanda kutayika kwa paketi.

Njira Zosungira Makanema ndi Kusunga Makanema

Makina ojambulira makanema apa netiweki (NVR) ndi makina owongolera makanema (VMS) amasunga zithunzi zowunikira kuti apeze umboni. Nthawi zambiri zimakhala kuyambira masiku 30-90 kutengera zofunikira pamalamulo ndi kuwunika zoopsa. Kusunga m'mphepete mwa makadi a SD kumapereka chosungira nthawi yotseka netiweki. Kusunga mitambo kumapereka mwayi wowonjezera nthawi yotumizira mauthenga kunja kwa malo koma kumafuna bandwidth yayikulu yotumizira mauthenga.

Njira Zabwino Zokhazikitsira Ma Kontrakitala

Kuyika kamera kumatsatira lamulo la mamita 20: kuyika makamera mkati mwa mamita 20 kuchokera ku malo owunikidwa kuti muwone nkhope.Nkhani ya NEC 725imayang'anira kukhazikitsa mawaya otsika mphamvu zamagetsi pamakina achitetezo. Ziŵerengero za kudzaza kwa ngalande siziyenera kupitirira 40% kuti kutentha kutayike bwino. Kuteteza pansi ndi kukwera kwa madzi kumateteza zida kuwonongeka ndi mphepo yamkuntho.

Mafunso Ofunsidwa Kawirikawiri

Kodi kusiyana pakati pa makina a NVR ndi DVR ndi kotani?

NVR (Network Video Recorder) imagwiritsa ntchito makamera a digito a IP kudzera pa netiweki. DVR (Digital Video Recorder) imasintha zizindikiro za kamera ya analog kukhala mtundu wa digito. Makina a NVR amapereka mphamvu zapamwamba kwambiri, kusinthasintha kosavuta, komanso mwayi wofikira patali. Makina amakono amagwiritsa ntchito kwambiri ukadaulo wa NVR.

Kodi makina a CCTV amafunikira malo osungira zinthu angati?

Zofunikira posungira zimawerengedwa pogwiritsa ntchito njira iyi: Kuchuluka kwa Kamera × Bitrate × Maola Ojambulira × Masiku Osungira. Kamera ya 4MP yojambulira mosalekeza pa 4Mbps imafuna pafupifupi 42GB patsiku. Kusunga kwa masiku makumi atatu kwa makamera 16 kumafuna mphamvu yosungira ya 20TB. Kujambula kogwiritsa ntchito mayendedwe kumachepetsa zosowa zosungira ndi 40-60%.

Ndi ma waya ati omwe amalimbikitsidwa poyika makamera a IP?

Chingwe cha Cat5e chimathandizira kuyendetsa kamera mpaka mamita 100 pa 100Mbps. Chingwe cha Cat6 chimalola kulumikizana kwa 1Gbps kwa makamera okhala ndi masensa ambiri ndi makamera a 4K. Kukhazikitsa kwakunja kumafuna chingwe choyesedwa ndi UV kapena choikidwa mwachindunji chokhala ndi chitetezo choyenera.Muyezo wa TIA-568imatchula zofunikira zokhazikika pakupanga mawaya amagetsi pamakampani.

Kodi makamera a CCTV amagwira ntchito popanda intaneti?

Makina a NVR am'deralo amagwira ntchito pawokha popanda intaneti. Kulumikizana kwa intaneti kumathandiza kuti muwonere patali, machenjezo a pafoni, komanso ntchito zosungira deta mumtambo. Makina odziyimira pawokha amapitiliza kujambula intaneti ikazima. Kuyang'anira kunja kwa malo ndi zidziwitso zotumizidwa kumafuna kulumikizana kwa netiweki.

Kodi ndi zinthu ziti zomwe zimakhudza momwe kamera imagwirira ntchito?

Zowunikira zochepa zimasonyeza kuchuluka kwa kuwala komwe kumafunika pazithunzi zomwe zingagwiritsidwe ntchito. Makamera amitundu nthawi zambiri amafunikira 0.1-0.5 lux kuti agwire ntchito usiku. Ma insulation a IR amapereka kuwala kosaoneka kwa infrared kuti azitha kuwona bwino usiku. Ukadaulo wa Wide dynamic range (WDR) umathandizira kuwunikira kumbuyo komwe kumakhala kovuta. Makamera a Starlight amajambula zithunzi zamitundu mumdima wochepa (0.001 lux).

Kutsiliza: Kufotokoza Machitidwe Ogwira Ntchito a CCTV

Mafotokozedwe a makina a CCTV amafunika kumvetsetsa ukadaulo wa makamera, zomangamanga za netiweki, ndi zofunikira zosungira. Makina okhala ndi IP okhala ndi resolution ya 4MP kapena yapamwamba amapereka umboni wabwino kwambiri pazochitika zachitetezo. Kapangidwe ka netiweki koyenera kamatsimikizira kutumiza makanema odalirika popanda zopinga za bandwidth. Opanga makontrakitala ayenera kulinganiza zoletsa za bajeti ya makasitomala ndi zofunikira pakugwira ntchito pomwe akuwonetsetsa kuti akutsatira malamulo oyang'anira am'deralo komanso malamulo achinsinsi.