Multi-function Embedded Instrumentation System Design And Realization

With the rapid development of the modern microelectronics technology, electronic products become small and multifunctional; the popularity of computer technology make the majority of electronic product design and development process shift from the way which is focused on the hardware to giving priority to the software. We design and develop seven common measuring instruments having common using functions in one "multifunction devices embedded systems" that is, it is modular design of hardware and its software can be trimmed, small size, low power consumption, has the characteristics of measuring instruments . It can be applied to teaching, researching, experiments, producting ,testing and other fields.We analyze and compare the hardware structure of the seven universal measurement equipment (digital storage oscilloscope, digital frequency meter, spectrum analyzer, data loggers, multifunctional function generator, arbitrary waveform generators and noise generator)and common using functionsons ,and the general design requirements for the current electronic measuring equipment.On that basis ,we study and design the mode which is a kind of embedded systems equipment belonging to the collaborative work.We design the 4-channel programmable signal conditioning modules, dual-2812 - DSP integrated module, 4-channel 12-bit high-speed DAC module, SL811 embedded USB interface module, 320 * 240 monochrome LCD screen, 4 * 4 keyboard and the system motherboard components generic.On the base of this common hardware platform, programming software.we realize the data acquisition of waveform, display and storage, peak peak measurement, frequency measurement, and so on.