In the implementation of wireless bridges, many people also call CPE, which can be used as a bridge for wireless networks. Generally, it is widely used in security monitoring and other application environments. It is often used in places such as scenic parks, station squares, port terminals, forest fire prevention, elevators, and tunnel sites.
Then, under the increasing demand and influence of wireless monitoring, how to choose a wireless bridge used as wireless monitoring transmission has become a major problem for engineering users. The variety of wireless bridges in the market, imported domestically, expensive and cheap, let users pick the eye.
How should engineering users choose the right wireless bridge?
1, the frequency band The wireless bridge can be divided into a 2.4 GHz bridge and a 5.8 GHz bridge according to the frequency band. The bridges of the two frequency bands have their own advantages and disadvantages. The 2.4GHz wireless bridge is the mainstream frequency band, and the compatibility and diffraction capability are better, but the anti-interference ability is poor. The 5.8 GHz frequency band is relatively pure, the anti-interference ability is relatively good, the transmission distance is also far, but the diffraction ability is poor.
The user selects the frequency band of the bridge according to the actual application scenario. For example, when the remote field is working, the 5.8 GHz bridge is selected, and the elevator monitoring selects the 2.4 GHz bridge. In some scenarios, a bridge with two frequency bands is also required to play the effect of Zuihao.
2, transmission rate
There are also different options for the transmission rate of the wireless bridge. From 150Mbps to 900Mbps. Specific users can choose according to engineering requirements. For example, if you need high-definition wireless video surveillance transmission, you should choose a wireless bridge with higher wireless rate.
3, the antenna
The antennas of the wireless bridge are also divided into several types, and there are omnidirectional antennas and directional antennas. The gain of the antenna is closely related to the transmission performance of the wireless bridge. Users with long-distance transmission needs to select a wireless bridge with higher gain and higher performance to ensure transmission.
4, power supply mode
The working environment of a wireless bridge usually involves some complicated outdoor environments, such as forests, ports, tunnels, etc., so power supply is a more troublesome problem. Selecting a wireless bridge that supports POE cable power supply can solve this problem well.
5, performance stability
As with all wireless network devices, the performance stability of wireless bridges is also important. If the bridge is stuck for a while, the packet is lost for a while, and the line is broken for a while, it is impossible to establish a reliable and stable monitoring transmission.
The stability of the wireless bridge is directly related to the product hardware, including the chip board, components and so on. Of course, the installation of the bridge is also very important, the installation is good, the performance of the bridge can be played normally and stably.
6, transmission distance
Users purchase wireless bridges for monitoring projects, and the target transmission distance is different. There are 3-5 kilometers in the near future and 50-100 kilometers in the far distance. Users should choose the appropriate wireless bridge according to the target transmission distance of their own projects.
The wireless bridge of Shenfang Technology Co., Ltd. has been tested in thousands of engineering projects and has high stability. It is widely used in construction sites, mining areas, tunnels, mountainous areas, no-man's land, rivers, scenic spots, oil fields. Environment, it is not convenient to wire, but it is necessary to transmit network signals, monitoring signals or other multimedia signals, temporary workplaces - large-scale event venues, convention centers, construction sites, disaster scene rescue and other temporary office space Office, monitoring and information transfer. Frequent changes to the location of the environment - such as bu dui exercises, construction sites, road and bridge construction and other needs monitoring.
Hydrogenation Reactor
Reactor Introduction:
1. Types: tubular reactor, tank reactor, solid particle bed reactor, tower reactor, jet reactor and other atypical reactor.
2. Concrete products: reactor, reaction kettle, autoclave, high-pressure kettle, high-pressure autoclave, super autoclave, synthetic tower, decomposition pan, vulcanizer, decomposition tower, polymerization kettle, transform furnace, cooking pot, steamed ball, gas furnace.
3. Materials: carbon steel, low-alloy steel, stainless steel and non-ferrous metals: titanium, nickel, copper, aluminum, molybdenum, zinc, cobalt etc and their alloy materials.
4. Pressure: low-pressure, medium-pressure and high-pressure.
5. Temperature: low-temperature, medium-temperature high-temperature.
6. Medium: not only non-flammable, non-toxic and non-corrosive medium but also flammable,toxic,corrosive medium and highly flammable,highly toxic, highly corrosive medium.
7. Processing capacity: maximum diameter:6m; maximum length:60m;maximum weight:600tons
8. Applicable Industries: petrochemical, coal chemical, precision chemical, nuclear power, metallurgical, pharmaceutical, machinery, food, pesticide, rubber, aerospace, marine, dye, new power equipment and so on.
9. Our advantages: reliable quality,codial service and great price.
Generally speaking, the hydrogenation reaction kettle can be divided into two categories: One is the traditional stirred reactor. Gas in the upper space of the vessel can not be circulated in the liquid phase, because of the miscibility and density difference of the gas and liquid. The unreacted gas accumulates in the upper space of the reactor in the reactor, which seriously affects the reaction rate.The other is the reaction kettle in which the gas is circulated in the liquid phase. Gas-liquid reaction is a kind of reaction often encountered in petrochemical, fine chemical, biological chemical and pharmaceutical chemical industries. Typical applications include catalytic hydrogenation, catalytic oxidation and fermentation. The common characteristic is that the contact area between gas and liquid significantly affects the reaction rate.
This equipment consists of a set of special components to achieve transmission requirements and shear deformation, high gas internal circulation and turbulence.When motor rotates by driving internal hollow agitator the centrifugal force produced by the circular motion of the fluid nearby under the action of the impeller makes the agitator self-priming, when negative pressure zone is formed, inner part will connected to gas through air axis,Thus, the gas on liquid surface is continuously sucked into the agitator and redispersed in liquid phase,It is especially suitable for gas-liquid and gas-liquid-solid heterogeneous reactions, such as liquid-phase catalytic hydrogenation, oxidation, amination, alkylation, fluorination, etc.
