HDcctv proposed a high-definition video surveillance system standard that supports high-definition television (HDTV) signal digital streams that can be propagated without packing.
Todd Rockoff, executive chairman of the HDcctv Alliance, said that the new generation of HDTV equipment for video surveillance uses broadcast-quality, high-definition digital video, which is an improvement over older analog systems. He also stated that these HDTV-based monitoring systems can be easily deployed in existing closed-circuit transmission media, just as wiring is often used by companies, governments, and retailers in older analog video systems. Rockoff asserted that "IP cameras have no future and HDTV is the future."
Many companies in the security industry have become members of the HDcctv alliance, HD-DSI chip maker Gennum Corporation, video codec startup Stretch Corporation, camera maker Ovii Corporation and security system ODM manufacturer EverFocus, etc., although the member lineup has no momentum like ONVIF Great, but it does not hinder its development. Today, many manufacturers around the world have developed their own HDcctv cameras, HDSDI liquid crystal displays and their accompanying HDDVR digital devices. As the leader in the security industry, SONY pioneered HDcctv products and announced at the press conference that SONY will fully advance to HDcctv, further affirming the development direction of CCTV.
In addition to SONY, Panasonic, Hass, NEXTCHIP, and EYENIX have all introduced ICs and products for HDcctv. Whether it is from the effect, the project implementation, or the application prospect, HDcctv greatly satisfies the people's pursuit of high-definition analysis of CCTV. In 2011, HDcctv will definitely flex its muscles.
The advantages of HDcctv are easy to install: All HDcctv cameras are plug-and-play compatible.
High quality images: 720p and 1080p, respectively 1.3 million and 2 million pixels;
The screen is smooth and real real-time monitoring is realized;
Reduce the number of cameras: Compared with traditional cameras, the monitoring range of high-definition surveillance cameras is expanded, effectively reducing the number of cameras required;
Low upgrade cost and easy operation: When upgrading from an analog camera to an HDcctv camera, only the camera needs to be replaced. The HDcctv camera is used for all the infrastructure supporting the analog camera.
Short learning cycle: Since the upgrade from simulation to HD does not require changes to its basic equipment, it will not require a lot of time for engineering personnel to transition directly;
The HDcctv Alliance is the only standard for high-definition video security, which means that HDcctv products and solutions produced by all manufacturers are compatible.
HDcctv bottlenecks The current development of HDcctv cameras has two major problems:
1, the transmission distance HDcctv and analog cameras, are all using coaxial cable for transmission. However, when the coaxial cable transmits high-frequency data, the transmission distance will be significantly shortened and it will not reach the standard definition of 150m. HDcctv1.0 version pointed out that HDcctv on the RG59 coaxial transmission distance is not less than 100m. With the technical difficulties conquered, in the 2.1 version released in 2011, the distance rose from 100m to 300m. In addition, there have been large-scale video optical transmitters on the market that have been specifically targeted at security. The transmission of high-definition video can reach 1080P/30HZ, and the problem of HDcctv transmission distance can be considered as a solution.
2. Storage Issues HDcctv uses digital methods to transmit video without packaging, without compression, without signal loss and delay. The result of such a smooth and high-definition picture is massive data. Million HD IPcamera is to solve this problem through packaging. Compared with analog cameras, HDcctv cameras do not have unnecessary data such as noise, but the actual test results are still not satisfactory. HDcctv wants to get better development and solving the storage problem will be the top priority.
Flap Disc
Flap disc, commonly known as flat emery cloth wheels, emery discs, flower impellers or elastic grinding discs, are a large variety of coated abrasive conversion products, which press the cut coated abrasive sheets one by one. It is formed by sticking adhesive to the back cover plate along the circumference. The flap disc are called strong elastic grinding discs. They are made of calcined emery cloth, which uses mesh, nylon, plastic, steel paper and other materials as the base. Attached abrasive tools, evenly distributed in a fan shape to ensure the best grinding effect. The particle size is 36#-320#, 60# and 80# are the most common, and the outer diameter is 4"-7" installed on the angle grinder. Angle grinders are mainly installed on hand-held Power Tools to polish and polish welds, burrs, chamfers, surface rust removal, and surface polishing of various metal and non-metal parts.
The flat emery cloth wheel (flap wheel) is formed by sticking multiple emery cloth sheets on the tray in a fan-shaped superimposed arrangement, and the bonding angle between each emery cloth and the tray plane is 10°-30°. The emery cloth arrangement of the utility model can make When the abrasive cloth wheel grinds and polishes the workpiece to be processed, the cutting angle is optimized to ensure that the base material of the abrasive cloth wheel and the grinding are consumed simultaneously, which obviously improves the overall wear resistance and grinding efficiency of the flat abrasive cloth wheel, and prolongs the service life of the abrasive cloth wheel. Grind the surface of metallic and non-metallic materials.
product advantages:
Compared with the resin grinding wheel for fixed abrasives, it has the advantages of polishing and polishing at one time, shortening the operation time, saving the grinding cost, high efficiency, good heat dissipation, high grinding efficiency, reducing operator fatigue, increasing machine life, etc. It has strong elasticity, High tensile and bending strength and good grinding effect. The grinding speed is fast, the effect is good, and the noise during grinding is low. It is suitable for various industries or fields of manufacturing such as major metal parts factories and machinery factories. Good weather resistance, salt spray resistance and heat resistance, suitable for use in different regions.
Scope of application:
It is suitable for polishing of stainless steel, metal, metallurgy, automobile, wood, marble and other industries. It is especially suitable for the processing of stainless steel and can replace the resin-shaped grinding wheel. It has strong elasticity, high tensile and bending strength, good self-sharpening, high grinding rate, and low noise. It is suitable for welding seams in the box. Polishing of the edges.
There are different classifications of louvers according to different angles. The following are two common classifications:
According to the appearance: T27 VS T29
Flap disc generally have two shapes, curved and flat.
The flap disc type is also called the T27 type, and the curved type generally refers to the T29 type.
The flap disc type (T27) has a flat surface. It is mainly used to polish the flat surface and the external edges and corners. The flap disc and the workpiece are angled during work, which can complete the grinding and polishing at one time, reducing the work flow.
The curved surface of the curved louver (T29) has an upward arc, which makes the T29 flap disc have a better cutting ability on the plane. When working, the T29 type grinding wheel forms an angle of 15° to 25° with the grinding surface, which is mainly used to deal with the grinding of contours and edges. When there are higher requirements for speed and cutting ability, T29 flap disc is undoubtedly the best choice.
The related abrasive products we can supply is Flap Disc Adhesive, Bonded Abrasives , and Abrasive Machine such as Flap Disc Making Machine,Abrasive Belt Making Machine, Flap Wheel Machine , Polishing Machine ,Sanding Disc Machine, if you have any needs about abrasive tools, please kindly feel free to contact us.
According to the type of abrasive particles: ceramic alumina VS zirconium corundum VS alumina
According to the type of abrasive selected, the flap disc can be divided into three types: ceramic alumina, zirconium corundum and alumina.
Because ceramic alumina itself has many crystals, it has good self-sharpening, relatively neat edges, good heat dissipation, and long service life. Therefore, ceramic alumina louvers are mainly used for the grinding of stainless steel, aluminum and other hard metals.
Zirconium corundum itself is a polycrystalline crystal, with fast cutting speed, good self-sharpening, and strong resistance to high pressure and high temperature. Therefore, zirconium corundum louver blades have strong cutting ability and long service life.
Alumina: single crystal, the cutting ability begins to decline at the beginning of grinding, and the abrasive grains are not easy to break, so the alumina flap disc is suitable for the processing of common metals.
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