The accuracy of measured quantity values of the temperature measurement system in the machine for bear-ing running-in of the truck and the machine for unloading axle box bearing of the passenger car is related to the qual-ity of wheel axle maintenance.At present,there is no metrological technical specification for traceability of quantity values of the temperature measurement system,nor is there a metrological standard established.In order to ensure the accuracy and reliability of quantity values measured by the temperature measurement system,research was conducted on the value assurance of the temperature measurement systems in the machine for bearing running-in of the truck and the machine for unloading axle box bearing of the passenger car.A calibration method for the temperature mea-surement system was proposed,the calibration process was introduced,and the uncertainty of the temperature mea-surement system is evaluated.The evaluation results indicate that the expanded uncertainty of the indication error of the temperature measurement system is not greater than 1/3 of the maximum allowable error interval of the tempera-ture measurement system,which meets the requirements for traceability of measurement values,the measured tem-perature values are accurate and reliable.
Machine for Bearing Running-inMachine for Unloading BearingTemperature Measurement SystemIn-dication ErrorUncertaintyCalibration Method
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