Izindaba Zemboni

Inkomba ejwayelekile yekhebula le-CCTV

2021-03-03

Inkomba ejwayelekile yekhebula le-CCTV

 

 

 

 

 

Ukukhethwa kwekhebula lokuqapha
Ukukhethwa kwekhebula

 

1,I-CCTV Cuyakwazi

 

Ibanga phakathi kwekhamera nomphathi wokuqapha lingaphansi noma lilingana namamitha ayi-200, kusetshenziswaRG59 cuyakwazi.

 

The distance between the camera and the monitoring host is more than 200 meters, using SYV75-5 video cuyakwazi.

 

2, PTZ control cuyakwazi

Ibanga phakathi kwepani / ukutsheka nesilawuli100m, bese usebenzisa i-RVV6×0.5 ishisiwecuyakwazi.

 

Ibanga phakathi kwepani / ukutsheka nesilawulimore than 100 meters, using RVV6×Kukhishwe u-0.75cuyakwazi.

 

3, Lens control cuyakwazi

 

Sebenzisa i-RVV4×Ucingo olungu-0.5.

 

4, Decoder communication cuyakwazi

 

kufanele isebenzise i-RVV2×1 i-pair evikelekile esontekile

 

5, intambo yamandla wekhamera

 

If the system has 20 ordinary cameras, and the average distance between the camera and the monitoring host is 50 meters, the BVV6m2 copper core double plastic wire should be used as the main power cuyakwazi. The power cuyakwazis used at different distances are shown in the following tuyakwazi:

 

Ibanga elijwayelekile phakathi kwekhamera nomphathi wokuqapha ngama-34 ~ 50m 21 ~ 33m20m

 

Power cord specifications (2 cuyakwazis) 6m24m22.5m2

 

Monitoring system Cuyakwazi laying

 

1. Cautions for laying the video cuyakwazi

 

1.1. If the distance between the camera and the monitoring host (image processor, matrix control host or digital video recorder) is less than 200 meters, the RG59 video cuyakwazi can be used. If it exceeds 200 meters, the SWY-75-5 video cuyakwazi should be used to ensure the monitoring image the quality of.

 

1.2. Kumakhamera afakwe kumakheshi, imigwaqo yensimbi ehlanganisiwe kufanele isetshenziselwe ukuhlanganisa izintambo kusikhaftini sekheshi futhi ibekelwe ukunciphisa ukuphazamiseka kwesiginali yevidiyo lapho i-elevator motor iqala.

 

1.3. If the camera is installed outdoors (such as the entrance of a compound or a parking lot, etc.), the cuyakwazi needs to be routed outdoors or through overhead steel cuyakwazis. If conditions permit, video arresters should be installed (because the installation of lightning protection equipment will cause The total project cost increases), that is, one video arrester is installed on the camera side and the monitoring host side respectively, and each video arrester must be grounded (outdoor cameras must be grounded separately, and the video arresters in the monitoring room can be grounded uniformly), To prevent damage to the equipment caused by induction lightning.

 

2. Izinyathelo zokuphepha zokubeka izintambo zokulawula

 

2.1. In the analog monitoring system, if a camera equipped with a pan/tilt zoom lens is installed and controlled by a pan/tilt lens controller, the control cuyakwazi should be selected according to the distance between the camera and the pan/tilt lens controller. When the distance is less than 100 meters, the pan/tilt control cuyakwazi can use RVV6×0.5 ishisiwecuyakwazi; when the distance is greater than 100 meters, the pan/tilt control cuyakwazi should use RVV6×Kukhishwe u-0.75cuyakwazi, and the lens control cuyakwazi uses RVV4×0.5 Sheathed cuyakwazi.

 

Uma isistimu yokuqapha i-analog ilawula i-pan / sitsheke nelensi ngesilawuli se-matrix control, i-decoder ngokuvamile iyadingeka. Ngokuhleleka kwesekethe yokulawula, sicela ubheke izidingo zobuchwepheshe besilawuli se-matrix esetshenzisiwe.

 

2.2. Kuhlelo lokubhekwa kwedijithali, uma ngabe ikhamera ene-lens / zoil zoom lens ifakiwe, i-pan / sitsheke nelensi kumele zilawulwe nge-decoder. Idekhoda ivamise ukufakwa eceleni kwekhamera, kuthi idikhoda nerekhoda yedijithali basebenzise ibhasi le-RS485 ukuxhumana. Izintambo kufanele zisebenzise i-RVVP2×1 shielded twisted-pair cuyakwazi from the digital video recorder to the nearest decoder 1, and then from decoder 1 to decoder 2... The current 16-channel digital video recorder can connect up to 16 decoders. The total length of RS485 communication cuyakwazi can be up to 1200 meters. The wiring diagram is as follows: see the relevant posts in the basic knowledge.

 

Idikhoda inezinhlobo ezimbili zokuphakelwa kukagesi: i-AC220V ne-AC24V. Uma kukhethwe i-AC24V decoder, ngokuvamile ihlinzekwa i-AC24V transformer. Kubaluleke kakhulu ukuthi wazi ukuthi ngenxa yokuphazamiseka kokukhishwa kwamandla kagesi we-DC12V ngamanye ama-decoder, kuzoba nomthelela othile esithombeni lapho sisetshenziselwa ukunikezwa kwamandla ekhamera, ngakho-ke kuyadingeka ukuthi unikeze ngokufanayo ikhamera (12V).

 

3. Izinyathelo zokuphepha zokubeka intambo yamandla yekhamera

 

Ukusebenza kwamakhamera ajwayelekile emakethe asebenzisa ugesi we-DC12V cishe kungama-200 ~ 300mA, futhi amakhamera ahlanganisiwe angama-350 ~ 400mA. Uma inani lamakhamera lincane (ngaphansi kuka-5) futhi ibanga phakathi kwekhamera nomphathi wokuqapha lisondele (ngaphansi kwamamitha angu-50), ikhamera ngayinye ingafakwa izintambo ngazinye nge-RVV2×Intambo yamandla engu-0.5 egumbini lokuqapha futhi inikwe amandla yi-transformer encane. Uma inani lamakhamera likhulu, amandla kagesi aphezulu alawulwa nge-12V DC kufanele asetshenziselwe ukunikezwa kwamandla okuphakathi.

 

In the program design and construction process, it is necessary to consider the total power of all cameras and the voltage drop caused by the transmission cuyakwazi (commonly known as "cuyakwazi loss", the resistance of 1m2 copper wire per 100m is 1.8Ω). Okweqapha isakhiwo, izintambo zepulasitiki ezimbili eziyizi-2.5-6m2 ngokuvamile zisetshenziswa njengamandla amakhulu okuhola ukusuka egumbini lokuqapha kuyacuyakwazi well, and walk along the cuyakwazi well to the cuyakwazi well on the floor where each camera is located. For the power supply of each camera on the floor, one RVV2×1 noma i-RVV2×1.5 (uma inani lamakhamera kuleli phansi lidlula u-6) izintambo zikagesi zingasetshenziswa ukunikezela amandla kumakhamera, noma ukusebenzisa i-RVV2×Izintambo ze-sheath ze-sheath zokuxhumana okuya kokukodwa zinikwe amandla yi