To meet the on-site in-situ calibration requirements of precision data collectors used in aircraft engine test benches,a comprehensive in-situ calibration system for data collectors has been developed.A low thermoelectric poten-tial scanning switch was designed,and the data collector calibration software was developed for controlling multifunc-tional calibration sources,low thermoelectric potential scanning switches,and precision data collectors to achieve on-site in-situ calibration.The low thermoelectric potential path switching technology was used to automatically convert and col-lect multiple signals.Automated and parallelized execution of calibration programs was realized through multi-threaded calibration technology.The application effect of the in-situ comprehensive calibration system for aircraft engine test bench data collectors was verified through experiments.The results showed that the accuracy of the system met the re-quirements,and the time required to calibrate a single data collector using the system was only 3 hours,which was more than 6 times more efficient than traditional manual calibration methods.This system provides strong support for achieving efficient,convenient,and on-site calibration of multi-channel data collectors,and provides important reference for the re-search of in-situ automation calibration technology for other measuring equipment.
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