Research on Bidirectional Acceleration Calibration Method for Rail Transit Ride Adding Devices
To ensure the accuracy and traceability of measurement instrument values in the rail transit industry,pro-vide a basis for instrument performance evaluation,and improve industry quality control.Firstly,the working principle of a portable additive device was introduced.Then,a horizontal and vertical acceleration calibration device based on a standard low-frequency vibration table and a standard low-frequency accelerometer was established to measure the additive device.Finally,through experimental analysis,the amplitude frequency response and amplitude linearity were studied,and the extended uncertainty of acceleration parameters was evaluated.The experimental results show that within the acceleration range of 0.02～0.20 g and frequency range of 2～5 Hz,the absolute error of vertical and hori-zontal acceleration is within±0.01 g.As the experimental frequency and acceleration increase,the absolute error of amplitude frequency response and amplitude linearity also increases.The low-frequency acceleration calibration device has high measurement accuracy and extended uncertainty of Urel=4.8%(k=2).According to the JJG2054-2015 metro-logical verification system table,the acceleration parameters can be traced back to national standards,achieving the accuracy and traceability of measurement values for rail transit specialized measuring instruments.
add passenger devicetracklow frequency vibrationaccelerationcalibration
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