The Design Of Many Sets Of Series Electromagnetic Flowmeter Calibration System

With the deep development of oilfield enterprises,continue to improve the water rate,water metering and more attention,water meter need verification amount significantly improve,especially electromagnetic flowmeter in the various fields of Engineering accounted for a large proportion.At present except the water table can realize series multiple verification,verification of electromagnetic flowmeter generally use the static volumetric method and the static weight method,these two verification device in the design of general a check with a,electromagnetic flowmeter,according to the national metrological verification regulations verification in general verification 5 points each inspection set 3 times,thus completing the consumed a electromagnetic flowmeter verification time is very long,so as to improve the efficiency of the verification of electromagnetic flowmeter is particularly important.In order to improve the current situation of the calibration device for low efficiency,this paper from the working principle of electromagnetic flowmeter and the internal structure of according to of national regulation of verification by static volumetric method verification device as the foundation,the design of the electromagnetic flowmeter series verification scheme.Hardware mainly by the pump and transducer,pressure stabilizing tank,test pipe section,the table clamp device,standard flow meter,flow control valve,commutator,gauges working group,control system,a pool.Software measurement and control system(hereinafter referred to as the system)using NI Lab VIEW development can be realized in the process of temperature transmitter,pressure transmitter,tank value measurement data automatic collection and calculation;realize the automatic control of water pumps,valves,converter and weighing system commutator,a drain valve,meet the pressure regulating and flow switch,thus completing the verification process data calculation,test results showed that,storage,printing,transfer and the working state of the process and measurement data on the screen display in real time.This paper from the hardware design and software design to the system step by step to achieve the multiple electromagnetic flowmeter series calibration and verification results and single test results fully verify the feasibility of the design scheme,stability,utility of debugging.