Research On Kev Technologv In Design Of Liquid Flow Standard Device

The liquid flow standard device,as the standard for the unity and transmission of the unit value of flow measurement,is the guarantee for the accurate transmission and traceability of the liquid flow value,and the source for the accurate and reliable measurement of the liquid flowmeter.The research shows that the main factors affecting the accuracy of the liquid flow standard device are the stability of the liquid flow,the velocity distribution and pulsation degree of the liquid flowing in the pipeline,the loss of the signal acquisition of the flow meter under test and the commutator.The research on the measurement technology and theoretical problems contained in these factors is the key to improve the measurement accuracy of the liquid flow standard device.Therefore,the liquid flow The measurement technology and theoretical research in the measurement standard device has become a hot spot in the field of international flow measurement,which belongs to the forefront of the field of international flow measurement.The liquid flow standard device is mainly used for the value transfer,traceability of liquid flowmeter and the research of new liquid flow measurement method.In this study,the key parts that affect the accuracy of the liquid flow standard device by the experimental method,including the research of the fluid state and the best measuring point position in the test section,the method of the flowmeter signal acquisition based on the independent time base,the development of the new in/out commutator with the same direction,solve the technical problems in the structural design and verification process of the high accuracy liquid flow standard device,It brings a new experimental research foundation for the design,manufacture and use of liquid flow standard device.