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Strain Electrical Measurement Technology in the course of more than half a century of development, has been widely used in various engineering structures, machinery and equipment, and its model of stress and strain, force and deformation measurement and analysis. Kinds of strain sensors are also gradually used in various engineering and other departments. With the development of electronic technology, strain test instruments by manual operation, figures show that the development of the automatic data acquisition - display, print, disk recording, data transfer and processing of the complete measurement system. The strain test system development toward portable, multi-channel, high-precision direction strain testing software gradually specialization. The paper design and development of a common strain of multi-channel digital test system. The system consists of a bridge conditioning circuit box and master chassis in two parts, comprising among hardware board and software system development. Signal conditioning circuit board hardware, including the bridge conditioning circuit box mode control board, as well as analog - digital signal acquisition board and the main control system in which the master chassis motherboard. 32-channel strain test system can be used to achieve the universal static, dynamic strain measurements, and the ability to select the bridge mode, auto-zero, auto-select the magnification. Strain test system provides basic strain data acquisition, display, storage and other functions. Dual SRAM mode capable of continuous sampling mode - the number of acquisition board through the system bus to transfer data, allows data to be able to quickly transfer and store data. The papers the common strain software system developed, in addition to the basic strain measurements, real-time display, data storage function, increasing the basic data processing and analysis module, so that the strain tested on the basis of stress size, structural strength check dynamic strain signal analysis. Stresses for static strain, the software offers a variety of strain rosette measurements, based on the structure of four strength theory checksum. The software for the cyclical dynamic strain spectrum analysis, power spectrum analysis method for resourcefulness signal provided. Knowledge of the software help module system instructions strain test system users, and strain the help of the knowledge of the test method. The paper designed to produce static, dynamic strain of the cantilever beam experimental setup, testing the development of a common strain test system. The experiments successfully measured had multiple bridged mode for static strain curve as well as a variety of eccentric mass of the dynamic strain curve, and dynamic strain of experimental data transform FFT results were analyzed to give a member of the first and second natural frequency ANSYS finite element analysis results consistent.
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