Maitiro Ekusarudza Kamera yeCCTV Kana Uine Mwenje Mushoma
Kusarudza kamera yeCCTV munzvimbo dzine chiedza chidiki hakusi kungotsvaga kamera "ichiri kugadzira mufananidzo unooneka." Mamiriro ekunze ane chiedza chidiki anoda musanganiswa wetekinoroji ye sensor, ma lens, kugadzirisa mifananidzo, uye mamwe mwenje (akadai se infrared) kuti uve nechokwadi chekuti mavhidhiyo akajeka uye anobatsira - kungave kwekutarisa zviitiko kana kuziva zviso kana ma license plates. Chinyorwa chino chinokurukura zvinhu zvakakosha zvekufunga nezvazvo kuti uve nechokwadi chekuti unosarudza kamera yeCCTV yakakodzera yevheranda rako, garaji, imba yekuchengetera zvinhu, nzvimbo yekupaka mota, muhoro wehofisi, kana nzvimbo yekunze husiku.
1. Nzwisisa rudzi rwemamiriro ekunze "asina chiedza" munzvimbo yako.
Usati watarisa zvinodiwa, iva nechokwadi chekuti waongorora mamiriro echiedza munzvimbo yekuisa:
– Rima rakazara: hapana mwenje zvachose (semuenzaniso, seri kwemba isina mwenje).
– Kusviba: pane chiedza chidiki chinobva pamatanda marefu, mwenje yemubindu isina kujeka, kana kupenya kwemukati memba.
– Kusiyana kukuru: kune nzvimbo dzechiedza dzakajeka (mwenje yemumugwagwa, mwenje yeneon) asi nzvimbo dzakapoteredza dzakasviba, zvingangokonzera kupenya uye nzvimbo dzakasviba.
- Zvinhu zvakawanda zvinofamba: vanhu kana mota dzinofamba; izvi zvinoda kuti kamera ikwanise kutora mifananidzo isina kujeka.
Zvinodiwa nekamera kuti "chiedza chisina kujeka" zvinogona kusiyana nezvinodiwa pa "rima rose." Murima rose, ungangoda infrared (IR) kana mamwe mwenje. Muchiedza chisina kujeka, kamera ine sensor hombe uye aperture yakafara inogona kugadzira mifananidzo yemavara yakaita seyechisikigo.
2. Sarudza sensor yakanaka yechiedza chishoma (hukuru hwesensor uye kunaka kwayo)
Kushanda kwesensa isina chiedza chakawanda kunonyanya kukanganiswa nesensa. Pfungwa yacho iri nyore: kana sensa yakakura uye tekinoroji yayo iri nani, inogona kutora chiedza chakawanda, zvichikonzera mifananidzo yakajeka uye ruzha rushoma (tsanga).
Zvinhu zvekucherechedza:
- Saizi yeSensor: masensa makuru anowanzo kuve nani husiku kupfuura masensa madiki ane resolution imwe chete.
– Tekinoroji yeSensor: mamwe makamera ane masensa ane sensori yepamusoro kana kuti anogadziriswa zvakanangana nechiedza chidiki.
Kana ukaona watarisana nesarudzo pakati pekamera ine resolution yepamusoro ine sensor diki pane kamera ine resolution yakaderera zvishoma ine sensor yakakura uye iri nani, kazhinji kana paine rima, sarudzo yechipiri ichapa mhedzisiro inoshanda zvakanyanya.
3. Nyatsoteerera kuvhura kwelenzi (aperture) uye kureba kwayo.
Kunze kwe sensor, lenzi iyi inosarudzawo kushanda kwechiedza chisina kujeka.
– Aperture (F-nhamba): f-nhamba diki (semuenzaniso f/1.6) zvinoreva gomba guru rinobvumira chiedza chakawanda kupinda. Izvi zvinobatsira kuwedzera kupenya uye kuderedza kudiwa kwekuwedzera kuwedzera (izvo zvinokonzera ruzha).
– Kureba kwefocal uye kona yekuona: Lenzi yakafara inobata nzvimbo yakakura, asi zvinhu (zviso/maplate) zvinogona kuita sezvidiki. Kuti zvizivikanwe, dzimwe nguva zviri nani kusarudza kona isina kupararira zvakanyanya kuti uwane ruzivo rwakakura mufuremu.
Kune nzvimbo dzakadai semasuo, sarudza furemu inoita kuti chiso chizadze nzvimbo yakakura zvakakwana yemufananidzo, pane kuva kure zvakanyanya uye diki.
4. IR Night Vision: iva nechokwadi chekuti IR range ndeyechokwadi, kwete nhamba yekushambadza chete.
Murima rakazara, makamera anowanzo shandisa infrared (IR) kugadzira mifananidzo mitema nechena. Izvi zvakajairika uye zvinowanzo nzwisisika pane kumanikidza mavara murima.
Zvaunofanira kutarisa:
– Kureba kweIR kunoshanda: Chiverengero che "IR 30 m" chinogona kusiyana mumamiriro ezvinhu chaiwo zvichienderana nekuratidzwa kwemadziro, mamiriro ekunze, uye dhizaini yeIR LED. Funga nezvedaro iri sefungidziro yakanakisisa mumamiriro ezvinhu akanaka.
– Kupararira kweIR: kune makamera ane IR yakasimba pakati asi mipendero yakasviba (vignetting), kana kuti zvinopesana.
- IR cut filter (ICR): iyi ficha inoita kuti kamera ichinje kubva pamasikati (ruvara) kuenda pahusiku (IR) mode zviri nani.
Kana uri kutarisa nzvimbo yakakura, funga nezvekushandisa makamera akawanda ane IR yepakati pane kamera imwe chete ine IR refu asi zvinhu zviri kumucheto hazvigone kuverengwa.
5. Funga nezve "nyeredzi" kana kamera yekuona husiku isina chiedza chakawanda.
Kana uchida kuti mavhidhiyo ako arambe aine ruvara husiku (zvinobatsira pakuziva mbatya kana mota), tsvaga kamera yakagadzirirwa chinangwa ichi, inowanzo kutengeswa nemashoko akadai sekuti "nyeredzi" kana kuti "usiku hwemavara." Makamera aya anoshandisa masensa anonzwa uye malenzi akajeka, dzimwe nguva achibatsirwa nechiedza chichena.
Asi pane kubvumirana:
– Ruvara rusina chiedza rwakawanda runogona kukonzera ruzha kana chiedza chakaderera zvakanyanya.
- Kana kamera ikabatidza chiedza chichena, izvi zvinobatsira neruvara asi zvinogona kukanganisa vanhu varipo, kukwezva kutarisisa, kana kuratidza zvimwe zvinhu.
Kune nzvimbo dzekugara, mwenje michena inogona kushanda zvakanaka pamaveranda nemagaraji. Kune nzvimbo dzinoda kucheneswa zvakanyanya, IR inogona kunge yakakodzera.
6. WDR uye mashandiro ayo pakurwisa kupenya
Chiedza chisina kujeka chinowanzosangana nemamiriro emwenje wekumashure: chinhu chacho chakasviba asi kune chiedza chakajeka kumashure kwacho. Apa ndipo panopinda WDR (Wide Dynamic Range).
– WDR chaiyo (inowanzonzi 120 dB) inowanzova nani pane "digital WDR" nekuda kwenzira dzekubatanidza dandemutande dzakakura.
- WDR inobatsira kuchengetedza zviso zvevanhu vari kufamba kubva munzvimbo dzine chiedza kuenda kune dzine rima zvichionekwa, uye nzvimbo dziri pedyo nemwenje yemumugwagwa dzichibva "dzachena" zvichena.
Kana nzvimbo yako yakatarisana negedhi rine mwenje wakasimba kana kuti kamera ichiwanzobata mwenje yemotokari, WDR chinhu chakakosha zvikuru.
7. Kumhanya kwefuremu, shutter, uye njodzi yekusajeka kwekufamba
Murima, makamera anowanzo deredza kumhanya kwe shutter kuti atore chiedza chakawanda. Mugumisiro wacho: zvinhu zvinofamba zvinova zvisina kujeka.
Mhinduro dzaunogona kufunga nezvadzo:
- Sarudza kamera inogona kuramba yakagadzikana ne frame rate yakakwana (semuenzaniso 20–25 fps) ine light processing yakanaka.
– Shandisa mamwe mwenje (IR kana mwenje) kuitira kuti kamera isade shutter inononoka.
– Kune zvinodiwa zvakakosha zvakaita sekuverenga ma "license plate", unowanzo da magadzirirwo akasiyana (speed shutter speed, lighting yakakwana, uye ma "angles" akakodzera). Kamera yakajairika ine chiedza chidiki haizoshandi paLPR/ANPR.
Muchidimbu, chiedza chidiki hachisi chekungoonekwa chete, asiwo nezvekuonekwa zvakajeka paunenge uchifamba.
8. Kugadzirisa: usangotevera ma megapixels chete
Resolution yepamusoro (4MP, 5MP, 8MP/4K) inopa rumwe ruzivo, asi kana chiedza chishoma inogona kuva bakatwa rinocheka nemativi maviri:
- Pamasensa madiki, resolution yakakwira, saizi yepikiseli inogona kuva diki zvekuti mashandiro ehusiku dzimwe nguva anoderera (ruzha rwakawanda).
- Kuwedzera kwebandwidth uye kuchengetedza, izvo zvinogona kumanikidza kudzvanywa kwakanyanya uye kuderedza kunaka kwechinhu.
Vazhinji vanoshandisa kamera ye4MP kana 5MP ine sensor/lenzi yakanaka inogutsa kupfuura kamera ye4K "yakachipa" isina mifananidzo yakajeka yehusiku.
9. Kudzvanya mavhidhiyo uye bitrate: H.265 inobatsira, asi usaderere zvakanyanya.
Pamarekodhi ehusiku, zvinhu zvidiki zvinowanzova zvakaoma kuchengetedza—kunyanya kana kudzvanywa kwacho kwakanyanya. Cherechedza:
– H.265/H.265+ rutsigiro runogona kuchengetedza nzvimbo yekuchengetera, asi iva nechokwadi chekuti bitrate haina kuiswa pasi zvakanyanya.
– Kana mifananidzo yako yehusiku ichiratidzika se "yakapfava" kana kuti zviso zvisipo, zvinogona kunge zviri kuti dambudziko harisi rekamera chete, asi kuti rinokonzerwa ne bitrate, resolution, uye frame rate settings paNVR/DVR yako.
Kunyangwe kamera yakanaka inogona kutaridzika zvakaipa kana magadzirirwo ekurekodha asina kunaka.
10. Nzvimbo yekamera nenzvimbo: chinhu chikuru chinowanzo furatirwa
Matambudziko mazhinji echiedza chisina kudzika anobva pakuiswa:
- Dzivisa kutarisa zvakananga panzvimbo dzine chiedza (magirazi ekunze, mwenje yemumugwagwa) pese pazvinogoneka.
- Ita shuwa kuti lenzi yakachena, imba yekamera haina kuvharwa nedandemutande, uye hapana kupenya kubva pamadziro ari pedyo nelenzi.
- Kune makamera ekunze, sarudza imwe ine chiyero chekudzivirira mamiriro ekunze senge IP66/IP67.
– Funga nezvekukwirira kwekuisa: kukwirira zvakanyanya kunoita kuti chiso chiome kuona; kuderera zvakanyanya kunoita kuti chive nyore kukuvadzwa. Kune vanopinda, kureba kwepakati nepakati kune kona yakapfava kazhinji ndiko kwakanyanya kunaka.
Kana paine sarudzo, kuwedzera mwenje mudiki, wakadzikama munzvimbo (semuenzaniso, mwenje wepaveranda) kunowanzo wedzera kunaka zvakanyanya pane kutsiva kamera.
11. Bvunzo chaiyo: kumbira muenzaniso wekurekodha husiku kana kuti edza
Zvakanyorwa hazviwanzoratidza mhedzisiro chaiyo. Kana uri kutenga chinhu chakakosha, ita zvinotevera:
- Kumbira mienzaniso yemavhidhiyo ehusiku kubva kumhando imwe chete yekamera.
– Edzai panzvimbo iyi panguva dzine rima guru (semuenzaniso 02.00–04.00).
- Ongorora kana uchikwanisa kuona zviso zviri padaro raunoda, kwete kungoona kuti "pane munhu".
Mhedziso
Kuti usarudze kamera yeCCTV yemamiriro ekunze asina chiedza chakawanda, tarisa musanganiswa we sensor yakanaka, lenzi yakajeka (small aperture), IR night vision inoshanda, uye maficha eWDR uye kugona kubata mafambiro pasina kujeka. Usatarise chete pa megapixels - hunhu hwechiedza chisina chiedza hunonyanya kutsanangurwa nekuti kamera inobata sei uye inogadzirisa chiedza. Chekupedzisira, yeuka kuti kuiswa kwekamera uye mwenje we ambient kazhinji ndiwo musiyano mukuru pakati pemavhidhiyo anongo "taridzika" uye mavhidhiyo anonyatso shandiswa pakuzivikanwa.
Kana muchida, ndapota taurai nzvimbo yekuisa (mukati/kunze), daro ramunoda kuona zvinhu (semuenzaniso, 3 m, 10 m, 20 m), kungave nechiedza kana rima guru, uye zvamunoda (kutarisa chete kana kuti chiratidzo che face/recense plate). Ndinogona kubatsira kukurudzirai mamwe matsanangudzo chaiwo, kusanganisira huwandu hwemakamera nenzvimbo dzawo dzekuisa.
