Study of Dynamic Strain Measurement System Based on Embedded Technology

Considering the disadvantages of conventional dynamic strain measurement system such as large outlines, inconvenient usage and liable to various interferences, A new dynamic strain measurement system is designed based on the modern embedded computer technology and strain measurement technology, which is the integration of signal conditioning, data acquiring and data issuing. This measurement system is built based on the advanced ARM9 processor, which is the controller of signal condition part, A/D conversion part, data memory part and others. And the data transmission and communication is realized via the Ethernet interface. Based on embedded Linux operation system, the software part of this measurement system is composed of the realization of monitor and control system in B/S mode by building embedded Web Server and the operation of the hardware part in the CGI program by calling hardware drivers. Users may access this measurement instrument for setting sample parameter, starting a sample, viewing data curve and downloading data directly by any Web Server without special application software. Based on system debugging and experiments, it is proved that the system had achieved the requirements that are put forward. The result shows that the properties of the system are superior to the existing measurement system.