High Precision Vibration Acquisition and Transmission System Based on FPGA
In order to meet the needs of vibration monitoring in different parts of an aircraft during flight and complete re-al-time acquisition of multi-channel vibration signals,this paper proposes a design scheme of high-precision vibration acquisition and transmission system based on FPGA.First,the conditioning circuit is designed to regulate the charge signal output by the sensor to the acquisition range.Secondly,the analog switch is used to switch the 12 acquisition channels,and the 16-bit high-precision ADC is used to realize the analog-to-digital conversion.Finally,FPGA is used to control the whole acquisition and transmission pro-cess.The digital data is framed,packaged,cached and sent to the protection memory through the Ethernet interface for data storage.The test shows that the data reliability is high.When the single sampling rate is 20 kSPS and the measurement range is±2000g,the acquisition accuracy of the vibration signal can reach±0.5%.
vibration signalFPGAanalog to digital conversionethernet
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