1 results about "Standard uncertainty" patented technology

The present application relates to a kind of mass range weighing apparatus metrological verification method, belong to metrological verification field.It includes: when equivalent standard weight is made by filling liquid to closed container, temperature, density and volume flow data are collected in real time, real-time equivalent mass cumulative value is calculated using temperature-density compensation model and filling flow is adjusted by closed loop control;Flow cumulative observation value and auxiliary weighing observation value are fused using Kalman filter to accurately determine filling end point;During the equivalent weight is placed in the load carrier of the weighing apparatus to be tested, weighing signal disturbance is detected in real time by sliding window variance, and the verification is automatically suspended and resumed after signal stabilization;Based on each error source component in filling process, combined standard uncertainty is calculated in real time, and if accuracy grade requirement is not met, automatic re-filling is triggered.The adaptive quality control of equivalent standard weight field production and verification whole process is realized, and the precision, reliability and automation degree of mass range weighing apparatus field verification are improved.