Study On Wireless Data Acquisition System Of Three Dimension Geoelectric Field For Mine-ground

The well to ground three-dimensional electric field wireless data acquisition system uses the comprehensive exploration methods made up of the electric logging method and surface direct current method, its basic principle is only to place the power supplying electrodes under a well in a certain deep, in the process of power supplying, completing the acquisition of the current (I) in power supplying circuits and the potential (U) of collecting electrode on surface, by calculating resistivity to reflect the scope and abnormal situation of detecting target underground, this method has enhanced the lateral capacity in terms of detection.First of all, the studied well to ground three-dimensional wireless data acquisition system is belonged to high density distributed parallel data acquisition system; The paper content is chosen a radio frequency module based on JN5148microcontroller to complete the design of collecting single point of electrode to electrical signal, processing and transmitting auxiliary circuit, power supply electrode. The microcontroller takes a32-bit RISC processor as the core; in order to achieve high precision data acquisition,the system is adopted differential signal as the signal source, then through A series of amplification circuit and power frequency trap circuit, the connected datas are brought into AD7710with24bits for processing, and take JN5148controller for controlling to achieve the real-time and stability of data acquisition.Secondly; The paper choose the ZigBee wireless communication technology as a wireless data acquisition system; Adopting the wireless technology has overcome such difficulties as the traditional acquisition system is troublesome, has big workload and so on, each electrode here is a single measurement electrodes, so that we can achieve simple high-density distribution arrangement of the system and the parallel data acquisition and sending; The distributed arrangement way is that the coordinator is a substation, take the16child nodes on each side of coordinator as the measuring electrode to built a star network in the shape of straight line.At last; after completing the hardware design of the overall well to ground three-dimensional electric field wireless data acquisition system, in the hardware and software debugging, the hardware debugging is divided into three modules, the software debugging mainly does the debugging on the network, the net electricity restructuring and sleep wake up function, the results show the performance has achieved the desired effect.