HD-CCTV was proposed by several chip and system suppliers in 2009 for the application of High Definition Surveillance Systems to jointly develop a new standard. Its horizontal resolution and vertical resolution are about twice that of current analog color television systems, and the 16:9 aspect ratio digital television system has a resolution of about 800 television lines or more, and a resolution of at least 1280x720.
HDCCTV market is also known as closed-circuit high-definition (in its form) or digital high-definition (in its bones), but the latter is easily confused with the network HD, because some users in the past have been accustomed to analog / The numbers are different, so based on this point and considering the application as the starting point, HDCCTV will be used to make a distinction with analog/network.
What is the core technology of HD-CCTV?
HD-CCTV utilizes the SDI (Serial digital interface) link originally developed for the professional broadcast market, that is, the transmission line from the camera-DVR in the analog security system that is now widely used. A handshake protocol that defines information such as video resolution and frame rate for high-definition video transmission. Such a digital HD video transmission mode (HD-SDI) is the most important basic core technology in HD-CCTV.
Currently, the mainstream HD-SDI resolution on the market is 720p (1280x720)/1080p (1920x1080). Most of the interfaces use the BNC interface to output the video line, but there are also direct fiber interfaces. The application of optical fiber is expected to be significant in the high-definition era. Grow, its frequency bandwidth, low loss, anti-interference, light weight and high scalability, this trend is worth attention.
What are the transmission interfaces of HD-CCTV?
The HD interface in the real sense includes HD-SDI, YPbPr, HDMI, and DVI. From the figure below, you can clearly see the advantages of the HD-SDI interface in the current high-definition digital interface. The HD-SDI interface is currently a better HD interface. At the same time, the HD-SDI interface is also the current high-definition industry standard HD interface.
HD-SDI Glossary
HD-SDI is a broadcast-grade HD digital input and output port. SID (Serial Digital Input) is a serial digital interface that is used to transmit uncompressed digital video signals; HD (High Definition) is a high-definition signal. HD-SDI is an interface specification transmitted under the condition of a signal rate of 1.485 Gb/s or 1.485/1.001 Gb/s according to SMPTE292M. This specification specifies data formats, channel coding methods, signal specifications for coaxial cable interfaces, connectors and cable types, and fiber interfaces. HD-SDI interface uses coaxial cable and BNC interface as cable standard. Effective distance 100 meters
HDMI Glossary
High Definition Multimedia Interface (English: High Definition Multimedia Interface, HDMI) is a digital video/audio interface technology. It is a dedicated digital interface suitable for image transmission. It can simultaneously transmit audio and video signals. The maximum data transmission speed is 5 Gbps. At the same time, it is not necessary to perform digital/analog or analog/digital conversion before signal transmission. HDMI can be combined with Wideband Digital Content Protection (HDCP) to prevent unauthorized copying of copyrighted audio and video content. The additional space provided by HDMI can be used in future audio and video formats. And because the demand for a 1080p video and an 8-channel audio signal is less than 4 Gbps, HDMI has a large margin. This allows it to use one cable to connect the DVD player, receiver and PRR, respectively.
About high speed Door Accessories:
1.Driving system: High Speed Door Servo System motor and control, motor SNMA / SEJ +reducer+flang+encoder+control box
2.Other accessories: Middle aluminium bar, bottom aluminium bar, aluminium vertical track, stainless steel vertical track, brushes,round nylon strip, PVC roll, rolling steel tube complete, drum be;;s for rolling tube, side end covers, stainless steel cover, steel tubes, air bag sensor system, safety light beam, Microwave sensor 24 Gigahertz,PVC welding machine, smoke and fire sensors, PVC transparent window, magnetic loop, photocell, remote control, manual push button, sound warning alarm Led lamp traffic light
For some main accessories, here is detain introduction:
1).24G radar sensor:
Brand: Hofic
Technology: Microwave processor
Maintain time: 0.5s
Protection: IP54
Transmitting frequency: 24.125GHz
Maximum installation height: <5meter
Transmitting power density: <5mw/cm2
Power consumption: <1W(VA)
Installation angle: 0-90°(lengthways) -30-30°(crosswise)
Supply voltage: AC&DC 12V-30V
2).Photocell:
Approval CE & ISO9001
Power supply AC/DC 12-30V
Static current 25A
Action current 40mA
Mounting distance Max 10m
NO or NC contact Done by NO./NC. contact selection
Working environment temperature -42℃ to +45℃
Working environment humidity 10 to 90%RH
Appearance dimensions( controller) 123*50*32mm(L*W*H)
Appearance dimensions(Magic eye head) 19*13mm(L*D)
3). Remote control
Operating Voltage: AC220V/50HZ+-20%
Transmit power:≤100mW;Super regenerative module, strong anti-interference
Operating temperature:-30℃-+70℃
Working frequency: 433MHZ;transmitter 1527, millions of encoding chip
Accept sensitivity:≤110dB
Manipulation method: electric remote control
Configure the quantity: Wireless number; factory configuration transmitter two. Can be equipped with PT2272 digital decoder chip
Configure the function: Up, down, stop, anti-lock full-featured reproduction
4). Magnetic loop
Voltage: 12V AC/DC +-10% 24V 115V AC+-10% 230V
Power: <2VA
Continued electrical output: 7A / 250V AC
Frequency range: 20 to 200K Hz
Response time: infinity (factory setting) or adjust maintain time
Sensitivity: 0.01% to 0.1% divided into 3 levels
Protection level: IP30
Electromagnetic compatibility (EMC) Complies with EM50081-1 and EN50082-2
Detection loop inductance: the limit of 40uH to 100uH ideal value 80uH to 300uH
Operating temperature: -25 ℃ to 70 ℃
Storage temperature: -40 ℃ to 85 ℃
Relative humidity: <90% non-condensing
Temperature compensation: automatic compensation up to 50 ℃ / h
Connection type: 11 pin DIN rail socket
Dimensions: 41 * 78 * 85 mm (width * height * length)
Weight: 250 grams
5). manual push button
This exit switch button is made of ABS and has built-in indicator light make it looks more elegant and fashionbale. It can be widely used in public entrance gates, public door, home, office, hotel, etc.
Door Exit Button Push To Exit Switch Door Opener For Access Control Security
Main Feature
Fashionable appearance
Made of ABS Plastic
Easy to install and operate
Used for access control
Specification
Mechanical Life: 500,000 test
Material: Plastic
6). Limit switch encoder
Voltage: DC5V-24V
Output voltage: high voltage≥85%Vcc, low voltage≤0.5V
Maximum mechanical speed:6000rpm
Anti-vibration: 50m/s,10-200HZ,XYZeach way 2 times.
Current consumption:≤30mA
Response frequency: 0-100KHZ
Protection: waterproof,oil proof,dust prevention, IP54
The output code system: binary code
Operating life: MTBF≥30000(+25℃,2000rpm)
Rotational inertia:4.0x10-8kgm²
Maximum load:radial direction20N
Axial direction:10N
Weight: about 0.4kg
,Electronic High Speed Door Accessories
Shenzhen Hongfa Automatic Door Co., Ltd. , http://www.hffreezerdoor.com