Water well drilling rig is a efficient,multi-function full hydraulic water well drilling rig.It is high efficiency because of having a larger torque of the turntable and is mainly used for water well in industry and agriculture, national defense building foundation, geological exploration, geothermic well and other foundation working, it is popular at home and abroad. Water Well Drilling Rig,Borehole Drilling Machine,Water Drilling Machine,Water Well Drilling Equipment JIANGSU XI TEC ENVIRONMENTAL&DRILLING EQUIPMENT COMPANY CO.LTD , https://www.xitecdrillingwx.com
Crawler mounted drilling rig can drilling in all kinds formations by mud drilling in soft formation and air DTH hammer in rock drilling,DTH Hammer is applied in rock drilling, slag is discharged by air pressure and the offstage efficiency is ten times than traditional rotary drilling.
Deep water well drilling rigs, in cutting drilling or rotary drilling can be operated in unconsolidated layer, and the slag can be discharged under by mud, the impact drilling operation can also be adopted and slag can be discharged by pressure air, the hydraulic water well drilling rig suitable for drilling complicated geological conditions.
Optical transceiver - the system principle you don't know
The optical transceiver is the terminal device for optical signal transmission. Due to the improvement of the current technology, the reduction of the price of optical fiber has made it a good application in various fields (mainly in security monitoring), so the manufacturers of optical transceivers are like mushrooming.
The optical transmission system consists of three parts: a light source (optical transmitter), a transmission medium, and a detector (optical receiver). Divided by transmission signal, it can be divided into digital transmission system and analog transmission system.
In an analog transmission system, the input signal is changed to a continuous change in amplitude (frequency or phase) of the transmission signal. The analog transmission system of optical fiber is analog modulation of the light intensity, and the modulation power of the light source changes with the amplitude of the modulation signal. However, due to the serious nonlinearity of the light source, its signal-to-noise ratio, transmission distance and transmission frequency are very limited.
The digital transmission system converts the input signal into a pulse signal represented by "1", "0", and uses it as a transmission signal. At the receiving end, restore it to the original information. In this way, the nonlinearity of the light source has little influence on the digital code stream. In addition, digital communication can adopt some methods of coding error correction, and it is easy to implement multiplexing. Therefore, the digital transmission system has great advantages and is obtained in many places. A wide range of applications.