The Research And Design Of The Intelligent Instrument Of Vibration Measurement Based On FPGA

Intelligent instrument have undergone tremendous changes by the force of electronic information techniques in the past decades. Nowadays, the technique of intelligent instrument is broadly applied in the field of industry field, communications, radar, sonar, voice and image processing. Instead of the combination of various chips, system design on one chip -SOC is proceeding in the hardware implementation of intelligent instrument. With the development of micro-electronics technology, Field Programmable Gate Array - FPGA is increasingly applied to single chip solutions of system integration with grand capability on single chip and high speed parallel calculation ability.Vibration, a common phenomenon in the industry field, is one of the important information sources in the equipment faults diagnose, and the amplitude which is one of basic characters of vibration, is significant in the vibration systems analysis. Aimed at the amplitude, one intelligent measurement model based on FPGA is discussed and framed in the thesis.After the analysis of one special vibratory style in the industry field, onenon-contact amplitude measurement method based upon the relativedisplacement of the sensor is proposed in the first, which achieved theamplitude with approaching the movement of the object vibration by therelatively displacement change of controllable sensor. According to thenovel measurement, the strict request reliant on the linearity of the sensorin the traditional instrument is reduced, the anti-jamming performance ofthe environment is enhanced, and the field usability in the industry area isbroadly. Secondly, the hardware realization of FIR digital filter, which isthe front digital signal conditioning method of the instrument, isoptimized by the combination mode of the distribution algorithm withFPGA chips structure feature. Finally, the implementation procedure ofthe intelligent vibration instrument based on FPGA is emphasized indetail. The master design of the system is focus on the FPGA chip, and ahigh precision AD data acquisition card is designed specially as its inputsources. According to the hierarchical digital system design method, thedata processing core on FPGA is designed and composed by the ADinterface mode, data processing mode and the display mode, which havebeen debugged successfully on UP3 development board, and satisfied theexpected experiment requirement.The implement of the intelligent instrument based on FPGA highly integrates various functional modes and greatly increases the computedspeed n stability and anti-jamming ability of the system. And the hardware structure of the system on FPGA can be real-time updated by the inosculated design with software and hardware conveniently, which greatly reinforces the design agility and functions extensibility, reduces the update cycle and cost of the system, and promotes the rapid hardware realization of the intelligent algorithm.Yang Lijie (Control Theory and Control Engineering)Supervised by ________________...