Isishwankathelo se-TL;DR:Iinkqubo zeekhamera zokhuseleko zeCCTV zabathengisi zifuna ukukhethwa ngononophelo kweentlobo zeekhamera, isisombululo, izisombululo zokugcina, kunye neziseko zenethiwekhi. Iinkqubo ezisekelwe kwi-IP zilawula imarike kwaye isisombululo se-4K siba yinto eqhelekileyo. Izinto ezibalulekileyo ekufuneka ziqwalaselwe ziquka inani leekhamera, iimfuno zeentambo, ukukhethwa kwe-NVR/VMS, kunye nokuthobela imigaqo yokubeka esweni yendawo. Ukufakelwa okuqhelekileyo kwezorhwebo kususela kwi-$500-$2,000 ngekhamera nganye kubandakanya nokufakwa.

Intshayelelo: Itekhnoloji yeCCTV yoKhuseleko lwezoRhwebo

I-Closed-circuit TV (CCTV) ibhekisa kwiinkqubo zokujonga ividiyo ezithumela imiqondiso kwiimonitha ezithile endaweni yokusasaza esidlangalaleni. Imarike yeCCTV yehlabathi idlule kwi-$55 yeebhiliyoni ngo-2026, kunye neekhamera ze-IP ezithatha isabelo semarike se-78% ngokutsho kwe-Uphando lweMarketsAbakhi kufuneka baqonde iinkcukacha zobugcisa, iimfuno zokufakelwa, kunye nokuthotyelwa kwemithetho xa bechaza iinkqubo zokubeka esweni.

Iinkqubo zeCCTV zanamhlanje zibonelela ngokungaphezulu nje kokujonga ukhuseleko. Uhlalutyo oluphambili luvumela ukuba abantu babale, baqaphele iipleyiti zelayisensi, kwaye bafumane ukungena kwemingcele. Ukudibanisa nolawulo lokufikelela kunye neenkqubo zealamu kudala iinkqubo zokhuseleko ezibanzi.

Iintlobo zeeKhamera zeCCTV kunye nezicelo

Iikhamera zeDome zokujonga ngaphakathi

Iikhamera zeDome zinendawo ebiyelweyo efihla icala lelensi. Ezi khamera zilungele iindawo zokuthengisa, ii-lobbies zeeofisi, kunye neepaseji zeehotele. Iidome ezimelana nokonakaliswa zimelana namandla okutshayiswa ukuya kuthi ga kwi-50 joules. Uyilo oluvaliweyo luthintela ukuqokelelana kothuli kunye nemizamo yokuphazanyiswa.

Iikhamera zeBullet zoKhuseleko lwePerimeter

Iikhamera ze-bullet zibonelela ngokuthintela okubonakalayo ngeendawo zokuhlala ezingangenisi mozulu ukuze zifakelwe ngaphandle. Ezi khamera zihlala zineendawo ezinde zokujonga kude. Izivalo ezine-IP67 zikhusela uthuli kunye nokuntywiliselwa emanzini. Izikhanyiso ze-IR ezidibeneyo zivumela umbono wasebusuku ukuya kuthi ga kwiimitha ezili-100 kuxhomekeke kwiinkcukacha zemodeli.

Iikhamera zePTZ zokubeka esweni okusebenzayo

Iikhamera ze-Pan-tilt-zoom zibonelela nge-360-degree coverage kunye ne-optical zoom ability eziqala kwi-20x ukuya kwi-40x. Abaqhubi bezokhuseleko balawula ngokukhutheleyo indawo yekhamera ukuze balandelele abantu. Iimpawu zokulandelela ngokuzenzekelayo zilandela ngokuzenzekelayo izinto ezihambayo ngaphakathi kweendawo ezichaziweyo. Iikhamera ze-PTZ zifuna ukufakwa kunye nenkqubo enzima ngakumbi kuneekhamera ezisisigxina.

Imigangatho ye-CCTV yokusombulula kunye nomgangatho womfanekiso

Iimfuno zeZiseko zoThungelwano kunye neBandwidth

Ukutshintsha kwePoE kunye nokuhanjiswa kwamandla

Amandla phezu kwe-Ethernet (PoE) athumela idatha kunye namandla ombane ngeentambo zeCat5e/Cat6 enye. I-IEEE 802.3af inika i-15.4W ngezibuko ngalinye, elaneleyo kwiikhamera eziqhelekileyo. I-IEEE 802.3at (PoE+) inika i-30W kwiikhamera ze-PTZ kunye nezifudumezi.Umgangatho we-IEEE 802.3btivumela i-60-90W kwizicelo ezinamandla aphezulu.

Ubalo lweBandwidth kunye noGcino

Iimfuneko ze-bandwidth zixhomekeke kwisisombululo, isantya sesakhelo, kunye ne-compression codec. Uxinzelelo lwe-H.265 lunciphisa i-bandwidth nge-50% xa kuthelekiswa ne-H.264. Ikhamera ye-4MP kwi-15fps ifuna malunga ne-4-6 Mbps. Utshintsho lwenethiwekhi lufuna amandla aneleyo e-backplane ukuphatha imisinga yekhamera eqokelelweyo ngaphandle kokulahleka kwepakethe.

Amaqhinga okugcina iividiyo kunye nokugcina

Iirekhoda zevidiyo zenethiwekhi (i-NVR) kunye neenkqubo zolawulo lwevidiyo (i-VMS) zigcina imifanekiso yokujonga ukuze kufunyanwe ubungqina. Amaxesha okugcina adla ngokuba ziintsuku ezingama-30-90 kuxhomekeke kwiimfuno zomthetho kunye novavanyo lomngcipheko. Ukugcinwa komda kumakhadi e-SD kubonelela ngenkxaso ngexesha lokucima kwenethiwekhi. Ukugcinwa kwelifu kubonelela ngokungafunekiyo kwindawo kodwa kufuna i-bandwidth enkulu yokulayisha.

Ukufakela Iindlela Ezilungileyo Zokusebenza Kwabakhi

Ukubekwa kwekhamera kulandela umgaqo weemitha ezingama-20: faka iikhamera ngaphakathi kweemitha ezingama-20 ukusuka kwiindawo ezijongiweyo ukuze kubonakale ubuso.Inqaku le-NEC 725ilawula ukufakwa kweentambo ze-voltage eziphantsi kwiinkqubo zokhuseleko. Umlinganiselo wokuzaliswa kombane akufuneki udlule kwi-40% ukuze kususwe ubushushu ngokufanelekileyo. Ukukhusela umhlaba kunye nokunyuka kwamanzi kuthintela umonakalo wezixhobo ezivela kwiziphango zombane.

Imibuzo ebuzwa qho

Yintoni umahluko phakathi kweenkqubo ze-NVR kunye ne-DVR?

I-NVR (Network Video Recorder) isebenza nge-digital IP camera streams ngokusebenzisa uqhagamshelo lwenethiwekhi. I-DVR (Digital Video Recorder) iguqula imiqondiso yekhamera ye-analog ibe yifomathi yedijithali. Iinkqubo ze-NVR zibonelela ngezakhono eziphezulu zokusombulula ingxaki, kulula ukuyikhulisa, kunye neenzuzo zokufikelela kude. Ufakelo lwanamhlanje lusebenzisa kakhulu itekhnoloji ye-NVR.

Ingakanani indawo yokugcina izinto efunekayo kwiinkqubo zeCCTV?

Iimfuneko zokugcina zibalwa kusetyenziswa le fomyula: Inani leeKhamera × I-Bitrate × IiYure zokurekhoda × Iintsuku zokugcinwa. Ikhamera ye-4MP erekhoda rhoqo kwi-4Mbps ifuna malunga ne-42GB ngosuku. Ukugcinwa kweentsuku ezingamashumi amathathu kwiikhamera ezili-16 kufuna umthamo wokugcina we-20TB. Ukurekhoda okusekelwe kwintshukumo kunciphisa iimfuno zokugcina nge-40-60%.

Zeziphi iintambo ezicetyiswayo xa kufakwa iikhamera ze-IP?

Intambo yeCat5e ixhasa ukubaleka kwekhamera ukuya kuthi ga kwiimitha ezili-100 kwi-100Mbps. Intambo yeCat6 ivumela uqhagamshelo lwe-1Gbps kwiikhamera ezineenzwa ezininzi kunye ne-4K. Ukufakelwa kwangaphandle kufuna intambo elinganiswe yi-UV okanye egqunywe ngqo enesiciko esifanelekileyo.Umgangatho we-TIA-568icacisa iimfuno zekhebula ezicwangcisiweyo zokufakelwa kwezorhwebo.

Ngaba iikhamera zeCCTV ziyasebenza ngaphandle konxibelelwano lwe-intanethi?

Iinkqubo ze-NVR zasekuhlaleni zisebenza ngokuzimeleyo ngaphandle kokufikelela kwi-intanethi. Uqhagamshelo lwe-intanethi luvumela ukubukela kude, izaziso zeselula, kunye nemisebenzi yokugcina idatha kwilifu. Iinkqubo ezizimeleyo ziyaqhubeka nokurekhoda ngexesha lokungasebenzi kwe-intanethi. Ukubeka esweni ngaphandle kwendawo kunye nezaziso ezityhalwayo kufuna uqhagamshelo lwenethiwekhi.

Zeziphi iimeko zokukhanya ezichaphazela ukusebenza kwekhamera?

Ubuncinci beenkcukacha zokukhanya zibonisa amanqanaba okukhanya afunekayo kwimifanekiso enokusebenziseka. Iikhamera ezinemibala zihlala zifuna i-0.1-0.5 lux ukuze zisebenze ebusuku. Izikhanyiso ze-IR zibonelela ngokukhanya okungabonakaliyo kwe-infrared ukuze kubonwe ubusuku obunye. Itekhnoloji ye-Wide dynamic range (WDR) ijongana neemeko ezinzima zokukhanya kwangasemva. Iikhamera zeenkwenkwezi zifumana imifanekiso enemibala ebumnyameni obuphantse bube bubonke (0.001 lux).

Isiphelo: Ukucacisa iiNkqubo zeCCTV ezisebenzayo

Iinkcukacha zenkqubo yeCCTV zifuna ukuqonda iitekhnoloji zekhamera, iziseko zophuhliso lwenethiwekhi, kunye neemfuno zokugcina. Iinkqubo ezisekwe kwi-IP ezinesisombululo se-4MP okanye ngaphezulu zibonelela ngobungqina obusemgangathweni wezobunhloli kwiziganeko zokhuseleko. Uyilo olufanelekileyo lwenethiwekhi luqinisekisa ukusasazwa kwevidiyo okuthembekileyo ngaphandle kwemida ye-bandwidth. Abakhi kufuneka balinganisele imida yohlahlo-lwabiwo mali lwabathengi kunye neemfuno zokusebenza ngelixa beqinisekisa ukuthotyelwa kwemigaqo yokubeka esweni yendawo kunye nemithetho yobumfihlo.