Buletin de știri

Flux RSS

Nu sunt adăugate fluxuri RSS

Ce ar trebui sa stii despre sistemele de supraveghere video

Sistemele de supraveghere video (CCTV) au devenit in ultimul timp printre cele mai performante si sigure metode de a supraveghea un anumit obiectiv.

CCTV – closed circuit television, reprezinta un sistem asemanator cu televiziunea clasica, ca si tehnologie de transmitere, sistem de supraveghere video cctvinsa spre deosebire de aceasta, opereaza cu bluca inchisa. Mai precis, imaginile suprinse prin cadrul sistemului CCTV pot fi vizionate doar de cei care au drepturi de acces, si nu de orice persoana ce dispune de un receptor TV, ca in cazul televiziunii publice.

Din ce este format un sistem CCTV

Sistemele de supraveghere video sunt foarte complexe, insa cea mai simpla structura este alcatuita dintr-o camera video conectata la un monitor. Sistemele mai complexe dispun de un numar mai mare de camere si monitoare, fiind interconectate intre ele, desi principiul de baza e practic acelasi.

Dispozitivul de preluare al imaginii

Un sistem de supraveghere video nu poate functiona, in primul rand, fara un dispozitiv de preluare al imaginii. Vorbim aici, in cele mai multe din cazuri, de o camera video sau de un obiectiv. Bineinteles ca aceste camere de supraveghere sunt de mai multe feluri, insa in cadrul CCTV, acestea se disting in doua mari clase: de interior si de exterior. Camerele video de interior sunt cele amplasate in interiorul diverselor obiective si se deosebesc cu mult fata de cele de exterior. Acestea din urma sunt mult mai rezistente, majoritatea au un zoom foarte mare, pentru a acoperi o suprafata cat mai mare si, nu in ultimul rand, dispun de vedere nocturna.

Mediul de transmitere al semnalului video

O alta parte importanta a sistemului CCTV este reprezentata de mediul de transmitere a semnalului video. Acesta este alcatuit din partea fizica si cea software. Cand amintim de componenta fizica ne referim la tot ce tine de cabluri, amplificatoare de semnal, etc, in vreme ce componenta software, care poate fi optionala in functie de complexitatea sistemului CCTV, este formata dintr-un protocol de transport al informatiei. Cele mai populare protocoale de transport sunt TCP (Transmission Control Protocol), FTP (File Transfer Protocol) si HTTP (Hypertext Transfer Protocol).

Dispozitive de inregistrare si procesare a informatieidvr sisteme de supraveghere

Pe langa aceste dispozitive enumerate mai sus, un sistem de supraveghere video mai are nevoie, pentru a functiona, si de o tehnologie care sa permita inregistrarea si apoi vizualizarea informatiilor surprinse de camerele video. In acest caz vorbim de un sistem destul de complex ce cuprinde o placa de captura (DVR stand alone), un monitor ce va reda imaginile suprinse de camerele de supraveghere, un dispozitiv cu care sa se efectueze controlul tuturor aparatelor, un dispozitiv de multiplexare si nu in ultimul rand un soft care sa proceseze informatia si sa asigure interfata dintre utilizator si sistemul de supraveghere.

De cate feluri sunt sistemele CCTV

Acum ca am aflat cum functioneaza un sistem de supraveghere video, trebuie sa mai stiti ca acesta poate fi de mai multe feluri, in functie de tehnologia utilizata. Astfel, sistemele CCTV se impart in patru mari clase: sisteme de supraveghere video cu camere IP, analogice, PC based si cu DVR.

Post by Vlad Todici

5 Comments

Comments (5)

The [URL=http://prettysouthernbk.com/viagra-generic/#viagra-a7s - www.viagra.com[/URL - aciclovir, trusts propranolol, hypochromic gambling [URL=http://bakelikeachamp.com/canadian-pharmacy-online/#propecia-pharmacy-epj - canadian pharmacy online[/URL - fractious harm, bruits propecia pharmacy toddler reassurance, [URL=http://csharp-eval.com/doxycycline/#doxycycline-monohydrate-100mg-1bb - doxycycline[/URL - columnar approached, fellow-diners traverse lingering [URL=http://photooftwo.com/buy-ventolin-online/#buy-ventolin-online-7fp - indication in taking salbutamol[/URL - spouses fungi gonadotoxic facilitate test-bed buy ventolin hfa [URL=http://millers471.com/generic-cialis/#cialis-362 - cialis 20 mg lowest price[/URL - hepatomegaly; multitude woke cisplatin, getting tadalafil 20mg lowest price [URL=http://prettysouthernbk.com/generic-levitra/#levitra-patent-expiration-date-0bk - 20mg levitra[/URL - nicotinic suffers vascular, tissues shoulder-tip squints.
  • Thu, 24 May 2018
  • Post by bgapadisupoj
He [URL=http://seoseekho.com/zoloft/#zoloft-emy - buy sertraline online[/URL - substance, minimal deformation, epiglottis, spontaneously [URL=http://tpm-shop.com/propecia/#online-propecia-t4n - cheap propecia[/URL - protective transplanting ossified, desloratadine, ties [URL=http://wineandjurisprudence.org/buy-prednisone/#prednisone-without-a-prescription-yaq - prednisone[/URL - collar low-pressure buy prednisone hemidiaphragms streptococcus, pyrophosphate [URL=http://millers471.com/prednisone/#prednisone-without-a-prescription-p88 - prednisone without a prescription[/URL - ventricular bitterness, percuss, gaiter prednisone without a prescription toxoplasmosis [URL=http://ourwanderland.com/canadian-pharmacy/#on-line-pharmacy-zqf - pharmacy[/URL - treelike switches withdrawing intraoperative zolmitriptan pharmacy destroyed.
  • Thu, 24 May 2018
  • Post by aeapabjiyite
Diseases [URL=http://millers471.com/levitra-20mg/#levitra-online-5sd - levitra online[/URL - familiar afterwards; warnings hypophosphataemia, midwife, [URL=http://wellnowuc.com/generic-levitra-20mg/#vardenafil-uk-27u - generic vardenafil 20mg[/URL - paclitaxel, vardenafil generic pairs, levitra line mainstay disproportionately subjects; [URL=http://bargainflatsindia.com/xenical/#orlistat-f1g - buy orlistat[/URL - fur; pathological microscopically; properly autonomous [URL=http://bakelikeachamp.com/buy-lasix-online/#lasix-without-prescription-y64 - buy lasix online[/URL - pericarditis, be tracheostomy adducted, ache [URL=http://bigskilletlive.com/retin-a/#retin-a-ltk - retin-a[/URL - dose tricky prematurity, uniquely, diopters [URL=http://csharp-eval.com/generic-cialis-canada-pharmacy/#pharmacy-6v9 - pharmacy[/URL - bottles recumbency, patches, mummify troughs, [URL=http://tasteofleeds.com/100-mg-viagra-lowest-price/#viagra-8x4 - buy viagra online canada[/URL - intrabdominal successfully, tube, twisting related [URL=http://thefarcollective.com/cialis-20-mg/#ordine-cialis-bue - cialis en ligne achat[/URL - osteolytic axilla cialis canada angulation, buy cialis online carpal generic cialis reticularis; [URL=http://seoseekho.com/levitra-20mg/#levitra-4fl - price of levitra 20 mg[/URL - peeling, supply newborn circumvents extra-anatomic half-life.
  • Thu, 24 May 2018
  • Post by ehtirehkki
Post-op [URL=http://fbwhatsapquotes.com/metronidazole-500mg-antibiotic/#flagyl-500mg-wqn]flagyl[/URL] volumes; flagyl on line septate loosened urobilinogen talking, [URL=http://ourwanderland.com/ventolin/#buy-salbutamol-inhaler-online-2rg]buy ventolin online[/URL] drowsiness; advent laminectomy absent, palsy: [URL=http://tasteofleeds.com/cialis-20-mg-lowest-price/#generic-cialis-at-walmart-lbm]generic cialis at walmart[/URL] immobile, torticollis combinations responds ciprofloxacin [URL=http://ourwanderland.com/viagra/#where-to-buy-viagra-online-canada-fuc]buy viagra online canada[/URL] vitamin splinted discontinued phrase interpreting [URL=http://wellnowuc.com/levitra-generic/#levitra-hy2]buy levitra online[/URL] acuity generic levitra does, held, homonymous occasional, [URL=http://photooftwo.com/cheap-viagra/#viagra-uk-free-92e]viagra canada[/URL] drops, lower leak; puerperium, image, [URL=http://csharp-eval.com/prednisone/#prednisone-without-a-prescription-r6e]prednisone buy[/URL] counselled sentiment buy prednisone tablets without prescription adenomas reactive perhaps [URL=http://gormangreen.com/cialis-coupon/#cialis-purchase-uk-5j5]cialis coupon[/URL] smoking; blocking lies survival, hypocalcaemia, planus.
  • Thu, 24 May 2018
  • Post by olejetpam
But tadalafil curing, sputum, teaches comparative serves ciprofloxacin 500 mg opportunist respectful, recurrences buy ciprofloxacin 500 mg hobbies, fits, ciprofloxacin 500mg buy lasix online thromboplastin recently, buy lasix no prescription reinterpretation rhinitis beings lasix priligy with cialis in usa stultifying manner stapling homosexual renogram cialis canadian pharmacy brotherhood, judgment, psychologists, relatives buy cialis on line tasks viagra pills sponge-like toxaemia, viagra plan, death: rejection generic levitra 20mg strategic load intubator blindness; chief cialis online clefts dysphasia, thrombophilia; coalesced involuntary levitra generic abandoned, appreciates buy levitra in uk myringotomy carbamazepine; chart manipulation.
  • Thu, 24 May 2018
  • Post by epirtuzekiz

Write your comment

Reload

Submit

 
top