Research And Development Of The Portable Data Acquisition And Analysis Instrument Based On SoC And RTOS

The users expect higher dependability of mechanical equipments in the modernindustry. The status monitoring and fault diagnosis system of the mechanicalequipment could be used to monitor the status of the machines run on line or off linein order to find fault or make early forecast to the trend of the fault, then you couldtake action to maintaining the machine or repair it lest the fault should make muchloss.Being the important front-end of status monitoring and their related faultdiagnosis, the instruments of data acquisition and analysis are developing towardsportable, modularization and low power consumption. We use a high integrated SoC,on which we transplant embed RTOS, to development a set of data acquisition andanalyse instrument which is portable and having high cost performance.Firstly, the thesis summarizes the present developing condition of intelligentinstruments which are used in fault diagnosis, after that, we build a hardware structureof our system, and establish a kind of modularized design method.Secondly, the paper makes a detailed introduction of C8051F124's models thatare used in the system, these models include CIP-51 microcontroller core, on-chipmemory, oscillator and specific programmable digital I/O. I configurate these modelsin response to the demand of the system. ADC model is a core of this system, so thethesis makes detailed expound of its content. In the AD conversion process, we usedigital filter algorithm when sampling in order to weaken or filter disturbance. Thethesis introduces the design of memory model, real-time clock model, transport modelof the system. Besides these, the paper focuses on the design of system'sman-machine interface, including introduction of the related chip and design ofsoftware.Then, the paper illustrates the process that transplanting μC/OS-II to C8051F124based on the introduction of primary coverage of μC/OS-II in advance. The systemcould become more stable and also meet the requirement of real time afterimplementing RTOS.Finally, I program a relative simple code to test the system, which is transplantedμC/OS-II. After this, I verify frequency of sampling of the instrument embed RTOS.