Cac loai camera CCTV: Dome vs Bullet vs PTZ
Chon dung loai camera la mot trong nhung quyet dinh quan trong nhat trong bat ky du an he thong CCTV nao. Camera dome, bullet, PTZ, fisheye va turret phuc vu cac muc dich khac nhau, va chon sai loai cho mot vi tri dan den chat luong hinh anh kem, lang phi ngan sach va lo hong phu song. Huong dan nay mo ta tung loai camera voi uu diem, nhuoc diem va ung dung thuc te.
Muc luc
Tong quan cac loai camera CCTV
He thong CCTV hien dai dua tren nam loai camera chinh: dome, bullet, PTZ, fisheye va turret. Moi loai duoc thiet ke cho cac moi truong va muc dich giam sat cu the. Camera dome hoat dong tuyet voi tren tran cua hang ban le se kem hieu qua tren hang rao chu vi. Camera bullet thiet ke cho tam xa tren bai do xe la qua muc va khong phu hop ve tham my khi lap tren quay le tan khach san.
Loai camera ban chon khong chi xac dinh chat luong hinh anh ma con tinh linh hoat lap dat, hieu suat IR, kha nang chong pha hoai, chong nuoc va muc do hien thi camera. Camera hien thi ro ran de toi pham bang su hien dien, trong khi camera kin dao ghi lai bang chung ma khong canh bao nguoi bi giam sat.
Hau het cac lap dat chuyen nghiep su dung ket hop hai hoac ba loai camera -- vi du dome ben trong, bullet tren chu vi va PTZ tren bai do xe. Huong dan nay mo ta chi tiet tung loai de ban co the dua ra quyet dinh sang suot cho moi vi tri camera trong bo tri cua minh.
Camera dome
Camera dome la loai camera duoc su dung pho bien nhat trong he thong CCTV thuong mai. Duoc dat ten tu vo hinh vom tron, chung duoc thiet ke de lap tren tran va la lua chon mac dinh cho giam sat trong nha tai cua hang, van phong, khach san, benh vien va toa nha cong cong.
Uu diem
Vo hinh vom an huong camera chinh xac, tao hieu ung ran de rong hon. Camera dome co kha nang chong pha hoai tu nhien -- lop polycarbonate bao ve ong kinh. Model IK10 chiu duoc 20 joule luc. Thiet ke nho gon va kin dao hoa vao tran nha.
Phien ban mini-dome con nho hon, ly tuong cho cua hang boutique, nha hang va cac moi truong noi thiet bi an ninh hien thi co the lam gian doan bau khong khi.
Han che
Vo dome co the gay van de phan xa IR. Khi den IR tich hop bat vao ban dem, anh sang hong ngoai co the phan xa tu ben trong vo, tao hinh anh mo. Camera dome cung co tam IR han che hon (20-30 m) so voi bullet (30-80 m).
Ung dung tot nhat
Giam sat tran nha trong nha tai cua hang, van phong, khach san, benh vien va truong hoc. Quay le tan va sanh. Hanh lang. Khu vuc cong cong can chong pha hoai. Su dung ngoai troi voi model IP66/IP67.
Camera bullet
Camera bullet co vo hinh tru dac trung. Day la lua chon hang dau cho giam sat ngoai troi va chu vi, duoc thiet ke de lap tren tuong, cot va mat tien toa nha. Thiet ke huong ro, de nhan biet phuc vu nhu phuong tien ran de manh.
Uu diem
Ly tuong cho giam sat tam xa. Khong co vo dome hap thu IR, cung cap chieu sang hong ngoai tot hon voi tam 30-80 m. Tam chan nang tich hop. Ket cau vung chac IP67. Lap tuong va cot don gian.
Han che
Huong camera hien thi ro giup ke dot nhap de tim diem mu. De bi pha hoai hon dome. Noi bat ve tham my -- khong phu hop cho noi that sang trong. Nhen va con trung dung mang tren den IR.
Ung dung tot nhat
Giam sat chu vi doc hang rao, tuong va mat tien. Bai do xe va duong vao. Khu giao hang. Loi vao toa nha. Vi tri ghi nhan bien so xe.
Camera PTZ
Camera PTZ (Pan-Tilt-Zoom) la camera co dong co co the xoay ngang (pan), doc (tilt) va phong to doi tuong xa (zoom). Day la loai camera da nang nhat nhung cung dat nhat.
Uu diem
Mot camera PTZ co the phu khu vuc can 5-10 camera co dinh. Xoay ngang 360 do, nghieng 90 do, zoom quang hoc 20x-40x. Tu dong theo doi doi tuong di chuyen. Preset vi tri va tuan tra tu dong (guard tour).
Han che
Chi co the nhin mot huong tai mot thoi diem. Khong phu hop lam camera duy nhat phu khu vuc quan trong. Dat gap 3-10 lan camera co dinh. Bo phan co khi can bao tri sau 3-5 nam. Tieu thu dien nang cao hon.
Ung dung tot nhat
Khu vuc ngoai troi mo rong: bai do xe, cong truong, khuon vien truong hoc. Giam sat chu dong voi nguoi dieu hanh. Trien khai tam thoi. Co so the thao.
Camera fisheye
Camera fisheye su dung ong kinh sieu rong (1,05-1,6 mm) de ghi toan bo goc nhin panorama 360 do tu mot diem lap duy nhat.
Uu diem
Mot camera thay the 3-4 camera thong thuong. Khong co diem mu. Ly tuong cho dem nguoi va phan tich ban do nhiet. Moi diem trong phong duoc ghi lai suot thoi gian.
Han che
Mat do pixel phan bo tren toan bo 360 do. Ngay ca fisheye 12MP cung khong dam bao nhan dien khuon mat. Chat luong dewarp khac nhau giua cac nha san xuat. Do cao lap dat toi uu 3-4 m.
Ung dung tot nhat
Khong gian trong nha mo rong: quay le tan, nha kho, san ban hang, phong hop. Dem nguoi va phan tich luu luong.
Camera turret
Camera turret, con goi la camera mat cau (eyeball), la thay the hien dai cho camera dome truyen thong. Chung khong co vo dome tren ong kinh, dieu nay co y nghia quan trong doi voi hieu suat IR.
Uu diem
Hieu suat IR tot hon dome -- khong co phan xa tu vo. Hinh anh ban dem sach hon, sac net hon. Nho gon va de lap dat, dieu chinh hon. IP67 su dung ca trong nha va ngoai troi.
Han che
Ong kinh hien thi ro, tiet lo huong camera. Kha nang chong pha hoai kem hon dome. Loai tuong doi moi tren thi truong.
Ung dung tot nhat
Moi noi su dung dome nhung hieu suat IR la uu tien. Lap dat nha o va thuong mai. Moi truong noi chat luong hinh anh ban dem la then chot. Ngay cang pho bien nhu thay the truc tiep cho dome.
Bang so sanh
| Tinh nang | Dome | Bullet | PTZ | Fisheye | Turret |
|---|---|---|---|---|---|
| Goc nhin | 90-120° | 60-100° | 360° (xoay) | 360° | 90-120° |
| Tam IR | 20-30m | 30-80m | 100-250m | 10-15m | 30-50m |
| Chuan IP | IP66 | IP67 | IP66/IP67 | IP66 | IP67 |
| Lap dat | Tran / Tuong | Tuong / Cot | Tran / Cot | Tran | Tran / Tuong |
| Phu hop nhat | Trong nha, cua hang, van phong | Ngoai troi, chu vi | Khu vuc lon, giam sat chu dong | Khong gian mo, sanh | Trong/ngoai nha, ban dem |
| Khoang gia | $50-300 | $60-350 | $300-3,000 | $150-600 | $40-250 |
Cach chon loai phu hop
Buoc 1: Trong nha hay ngoai troi?
Vi tri trong nha -- dome hoac turret. Vi tri ngoai troi can IP66+ va tam IR dai hon -- bullet la lua chon mac dinh cho ngoai troi.
Buoc 2: Khu vuc phu song lon co nao?
Khu vuc nho-trung binh -- dome/turret. Khu vuc mo lon -- fisheye. Rat lon -- PTZ hoac nhieu bullet.
Buoc 3: Ngan sach la bao nhieu?
Turret mang lai gia tri tot nhat. Ket hop cac loai cho ket qua tot nhat. PTZ chi khi chuc nang xoay-nghieng-zoom thuc su can thiet.
Buoc 4: Can nhung tinh nang gi?
Chong pha hoai -- dome IK10. Tam IR xa -- bullet. Tu dong theo doi -- PTZ. 360° khong diem mu -- fisheye. Nhin dem tuyet voi -- turret. Ghi bien so -- bullet voi varifocal.