High-precision Multi-channel Strain Signal Acquisition Module with Voltage Self-calibration
In view of the existing problems in the strain acquisition system,such as low acquisition accuracy,narrow measur-ing range,fewer channels and cumbersome calibration,a high-precision multi-channel strain signal acquisition module with voltage self-calibration was designed.The module was based on the high-precision analog conditioning conversion circuit as the core,com-bined with the theoretical simulation and analysis of electronic line noise,and the acquisition channel was calibrated by the self-calibration circuit.By compensating the excitation voltage of the remote transmission line,the high precision measurement of 48-channel large strain signal and differential voltage signal was realized.The practical test results show that the measuring range of strain signal can reach±100 000 με,and the measuring accuracy is better than 0.05%FS.The voltage signal measurement range can reach±15 V,the measurement accuracy is better than±(0.025%RD+500 μV),and the accuracy is high,with good stabili-ty and versatility.
strain signal acquisitionself-calibrationhigh precisionmulti-channelcompensation for remote excitation
NETL
NSTL
万方数据
维普
