The Control Technology Research Of Wireless Distributed Test System

In order to achieve the space-time field testing of underwater explosion shock wave and bubble parameters in the blast water conditions, the paper studies a distributed control technology of underwater explosion testing based on wireless transfer mode, integrating acoustic signal transceiver system, multi-mode data acquisition and storage technology, which form a new methods of f the underwater explosion test based on more floating base stations, which will achieves fast test in the blast water and lays technical foundation of the space-time reconstruction.Having discussed the shockwave's basic characteristics of underwater explosion, the develop mental status of traditional test methods and the time unity of wireless distributed test system, on the basis of which, the author has designed a wireless distributed test system composed of a master station and several floated testing base stations which possess the testing efficacy of space-time field. First, the overall design idea and main functions of distributed test systems are introduced, focusing on the detailed functions and circuits design of control master station's wireless transceiver, synchronous timing and control, command coding, computer interface so as to master station can achieve some operations to base station's, such as synchronous timing, power control, trigger control, data transmission, parameter setting, etc. Second, the author designs control circuits and control software of the test base station's wireless transceiver, clock synchronization and calibration, command decoding, extension bus so as to achieve some functions of the test base station's data collection and transmission, control and transceiver of acoustic signal, power management of modules, time unity among the base stations,etc. In the paper, the author mainly finishes designing downlink commands and plink data back-transmission protocol format, and proposes multi-channel parallel transmission method and large-capacity data eigenvalue extraction method. These methods have achieved an efficient return data and improved the transmission efficiency of the test system. the author also researches time synchronous technology of wireless distributed test system and presents a new method of time synchronization calibration frequency measurement, which uses the GPS to generate unified time base and clock calibration technique and realizes synchronize reference signal and time frequency of the different base stations. In this way, time synchronization accuracy will be up to microsecond range.Therefore, starting the research of wireless distributed test technology in the areas as the National Defense Construction area in time and applying it to marine development and other civil construction have great social and economic value as well as profound strategic significance.