The development of video optical transceivers in China is accompanied by the development of monitoring.
Video optical transceivers are
devices that convert one to multiple analog video signals into various optical signals and transmit them through optical fiber media. They are also divided into analog optical transceivers and digital optical transceivers. .
1. Appearance, reasonable structure
The digital video transmitter and receiver has a high technical content. The appearance of the digital video transmitter and receiver should be compact and exquisite, and the overall structure must meet the requirements of the engineering installation as much as possible. In addition to the 19-inch cabinet, general indoor digital video transceivers should also be able to take into account the need for the projector to be placed on the desktop or wall in the project. In addition, digital video transmitters must also have good thermal performance and electrical contact performance.
2, rich interface, reasonable layout
In addition to requiring sufficient video interfaces, digital video transmitters may also require or may require other interface with rich functions, such as high-fidelity audio interfaces, telephone interfaces, asynchronous data interfaces, Ethernet interfaces, and digital interfaces, etc. The selected digital video optical transceiver must have system upgrade capability so that it will not completely replace the device due to network upgrade or system function change, thereby protecting the user's upfront investment.
There are many kinds of digital video optical transceiver interfaces, and there are a large number of interfaces. There may be some modes to set the dial switch. The user interface formed by all these elements should be reasonably laid out, and there should be considerable operating space between the interfaces to facilitate the installation of the project. And maintenance. For example, the video interface is too intensive, and in actual applications, an awkward situation in which a normal video connector must be removed to repair a certain video connector appears.
3, the indicator light clear, easy to open and maintain the project
In order to facilitate the opening of the project and the maintenance of the project, the digital video transmitter and receiver shall be marked with clearly defined indicators. In addition to the power indicator, the transceivers of the digital video transmitter and receiver must all have video indicators to indicate whether the corresponding video channels have input or output of video signals. Engineers and users can use the video in the engineering startup phase and project maintenance phase. The indication of the video indicator, judging the situation in the opening and maintenance, locating the fault point, and solving the possible problems as soon as possible.
In addition, for the audio and data sections, corresponding indicators should also be provided. The simple way is to refer to the telecommunication equipment's practice and provide the synchronization indicator and the loop indicator. According to this, the engineering personnel and the equipment manufacturer can judge whether the equipment system is faulty or the interface part is faulty, so as to make a correct response.
For Ethernet interfaces, connection/activity indicators, full/half duplex indicators, and 10M/100M indicators should be provided in accordance with the general requirements for data communications equipment. Digital video transmitters should also provide system indicators to indicate whether the sending device is normal and whether the receiving device is normal. This is to make it easier for engineers to distinguish between equipment failure and fiber link failure.
Lightcom is committed to optical fiber communications; research and application in the field of fiber optic monitoring, independent research and development of own-brand LC monitoring digital optical transceivers, fiber optic transceivers, telephone optical transceivers, PDH optical transceivers, and has independent intellectual property rights (including core technologies. Widely used Safe City,*, Transportation, Education, Medical, Finance, Electric Power, and other industries; Continuous innovation on the basis of in-depth understanding of the needs of industry users, to provide users with professional end-to-end optical fiber transmission solutions.
Oil Drilling Rig
With the continuous development of drilling production, the use conditions of drilling rigs have become more and more diversified, and various types of drilling rigs have appeared accordingly. Factors affecting the type and composition of drilling rigs include drilling method, drilling depth, borehole size and drilling tool size, and drilling area conditions (such as electricity or fuel, transportation, and meteorological conditions).
1. According to drilling method
(1) Impact drilling rigs, such as wire rope impact drilling rigs (drilling rigs), vibration drilling rigs, etc.
(2) Rotary drilling rigs, such as those used in rotary drilling.
(3) Downhole power drilling tools, such as rotary drilling tools, turbo drilling tools, screw drilling tools, electric drilling tools, etc.
2. Divided by drilling depth
(1) Ultra-deep well drilling rig. It adopts a drilling rig with a diameter of 114 mm drill pipe, a nominal drilling depth range of more than 7000 meters, and a maximum hook load of more than 4,500 kN.
(2) Deep well drilling rig. The drill rod is 114 mm in diameter, the nominal drilling depth is 4000-7000 meters or more, and the maximum hook load is 2250-4500 kN or more.
(3) Drilling rigs for medium and deep wells. It adopts a drilling rig with a diameter of 114 mm drill pipe, a nominal drilling depth range of 1500-4000 meters or more, and a maximum hook load of 900-2250 kN or more.
Three, according to power equipment
(1) Diesel Engine-driven drilling rigs, which use diesel engines as power through mechanical transmission or hydraulic transmission.
(2) AC driven drilling rig, suitable for use in oil fields with industrial power grids.
(3) The drilling rig is driven by direct current, and the working unit is driven by a direct current motor.
Fourth, according to the driving mode
(1) Drive alone. Each working machine is driven by generators of different sizes, which are mostly used for electric drive. The transmission is simple and easy to install, but the power utilization rate is low and the total equipment mass is large.
(2) Unified drive. The three working units of drawworks, drilling Pump and turntable are driven by the same power unit. Most drilling rigs use this scheme. The unified drive can also include only one drilling pump, and the other drilling pump is driven separately. The unified drive drilling rig has high power utilization and can be adjusted mutually when the engine fails, but the transmission is complicated, installation and adjustment are troublesome, and the transmission efficiency is low.
(3) Group drive. The combination of power is between individual drive and unified drive. There are two options for three working machines. The power utilization rate of this kind of drilling rig is higher than that of a single drive, and the transmission ratio is simple to drive in a unified manner. Two sets of working machines can also be installed on different heights and scattered sites.
Oil Drilling Rigs,Mine Drilling Rigs,Water Well Drilling Rigs,Exploration Drilling Rigs
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