The transmission standard often uses 802.11b/g/n (2.4G11/54/300M respectively) and 802.11a/n (representing 5.8G54/300M respectively) standards. The wireless bridge has four working modes: wireless coverage, point-to-point, Point-to-multipoint, trunk connection. Especially suitable for close distance and long distance communication in cities. It has two kinds of access methods, IP interface access, IP + E1 dual interface access.
Network transmission under the condition of no big obstacles (mountains, buildings, trees). Its working distance depends on the environment and the antenna. Data transmission over 10 kilometers is transmitted via a point-to-point bridge with built-in high-gain or external high-gain antenna. A bridge with internal antenna can be used as a client (emission) in a range of approximately 5 kilometers. , use the built-in or plug-in large-angle antenna as a base station to receive.
Wireless bridges are usually used outdoors and are mainly used to connect two networks. Wireless bridges need to be used in pairs. The AP can be used alone, the wireless bridge modulation and receiver sensitivity can be transmitted to the distance of up to 50km, 5.8G channel contrast 2.4G channel bridge, 5.8G channel carrier frequency is higher, the stronger the anti-interference ability, farther from the transmission, The higher the acquisition rate. (In theory, a 5.8G device is twice as high as a 2.4G channel device. If the same gain antenna, transmission power, and transmission distance are used, the 5G device transmission rate will be double that of the 2.4G device.)
The operating bandwidth of each channel of 802.11ac is increased from 40MHz of 802.11n to 80MHz, the bandwidth is doubled, and the corresponding transmission rate reaches 600Mbps. Of course, the actual transmission rate may be between 300 Mbps and 400 Mbps, which is close to 3 times the actual transmission rate of the current 802.11n (the actual transmission rate of the current 802.11n wireless router is between 75 Mbps and 150 Mbps), and it is completely enough to transmit more on one channel at the same time. Road compressed video stream.
The article is based on the concept of wireless network bridge in wireless monitoring system. . Com, please indicate, thank you!
DUPLEX STAINLESS STEEL
Duplex Stainless Steels Available
Yuhong Group supplies LDX2101, 2205, Ferralium 255, Zeron 100 and LDX2507 in the form of plate, sheet, strip, bar, pipe, tubing, pipe fittings, flanges and weld wire.
Duplex Stainless Steel Overview
Duplex Stainless Steels, also referred to as austenitic-ferritic stainless steels, are a family of grades with about equal proportions of ferrite and austenite. These steels have a duplex microstructure which contributes to their high strength and high resistance to stress corrosion cracking. Due to their high content of chromium, nitrogen and molybdenum, duplex steels offer good resistance to local and uniform corrosion. Duplex stainless steels have good weldability.
Today, modern duplex stainless steels can be divided into three groups:
Lean Duplex such as LDX2101
Standard Duplex such as 2205, the work-horse grade accounting for more than 80% of duplex usage
Super Duplex such as Ferralium 255 and Zeron 100 and LDX2507
Of the duplex grades, duplex 2205 is the most widely used. However, the super duplex steels like Zeron® 100 and LDX2507 are excellent for servicing severe corrosive environments, such as offshore and marine applications. Lean duplex 2101 is available as an economic alternative to 300 series stainless steels.
What are the Characteristics of Duplex Stainless Steels ?
Very good resistance to uniform corrosion
Very good resistance to pitting and crevice corrosion
High resistance to stress corrosion cracking and corrosion fatigue
High mechanical strength
Good sulfide stress corrosion resistance
Good abrasion and erosion resistance
Good fatigue resistance high energy absorption
Low thermal expansion
Good weldability
In what Applications are Duplex Stainless Steels® used ?
Oil and gas equipment
Offshore technology
Seawater desalination plants
Chemical industry, especially when handling chlorides
Flue-gas cleaning
Desalination plants and seawater systems
Pulp and paper industry
Cargo tanks and pipe systems in chemical tankers
Firewalls and blast walls on offshore platforms
Bridges
Storage tanks
Pressure vessels, reactor tanks, and heat exchangers
Rotors, impellers and shafts
Duplex Stainless Steel Heat Exchanger Tube
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