Standard Industrial Signal Acquisition System Based On ARM

This article is under the background of daya bay neutrino experiment. A set of generaltest and control platform is developded for the neutrino experiment gas system, whichincludes switch input collection system, switch output control system, standard industrialcurrent and voltage signal acquisition system.This set of system uses the modular designing thought.Including two parts.The first partrefers to the front field data acquisition (including current, voltage and switch input) and onecontroling (switch output) module.These four modules are all designed by one kind of philips’P89LPC935. Four modules are as follows: switch input acquisition module with eight inputchannels; switch output control module with five output channels; current acquisition modulewith four input channels; voltage acquisition module with five input channels. Of course, eachmodule has its own specific performance index, which will be introduced in the secondchapter emphatically, and these indexes are all based on gas system requirements.The second part is communication module based on ARM9core.So-calledcommunication module, the first meaning that this module connects with the front acquisitionand controling modules, using RS485serial interface to realize. About the software, ARMwill exchange date with MCU using application; the second meaning happens between thismodule and PC.The data will be transmitated through network interface. The software isreallized using BOA server based on B/S structure, in order to log in and monitor the dateusing PC. The DIM software is used to send the data to the PC, which supports TCP/IPprotocol. The most advantage of using modular designing is that we can combine differentmodules together, and then connect with ARM core controling module using RS485interface.Each module has its own address. When it is power on, the applications will readeach module address, then pass the address to the ARM to confirm which modules that thesystem cantains.The system has stably worked in the daya bay neutrino experiment environmentmonitoring system.