Research On The Receiver Development Of The ULF Data Acquisition System

The ultra low frequency communication technology which attached great attention across the world as a new research field has a broad application prospect in logging while drilling, underwater communication system, marine seismic monitoring , nuclear waste disposing and environment protection, etc.During drilling operation, the real-time information acquired from underground will deliberately decide the performance and cost of the system. The more information received, the higher efficiency the drilling system will possess and the lower the cost will be. Therefore, the information transmission system of logging while drilling has become the key technology of logging system. In order to transmit the underground information to the ground, we design a ultra low frequency wireless data acqisition system to realize the communication data transmission between underground and ground. The system scheme includes transmitter and receiver; here we mainly research on the receiving part of ultra low frequency wireless data acquisition system. Besides that, a general design scheme including both software design and hardware design is provided according to the system working principle and requirement. The hardware part contains the antenna design, signal processing circuit, monolithic computer system, power circuit and serial communication circuit. The software part of receiver is developed by C program language, and has been compiling and debugging under WH6000 environment designed by WEIFU company while the initial software of transmitter applies Visual Basic as the program language.Finally, combined with the designed software of transmitter and receiver, a design summary is made by analyzing and debugging the ultra low frequency coli antenna and signal processing circuit.