Calibration device and method of pitot tube current meter

Abstract

The invention belongs to the technical field of measurement technical mechanisms and environment-friendly monitoring systems, and relates to a calibration device and method of a pitot tube current meter. The calibration device comprises a wind tunnel, an auxiliary control system and a measuring working table used for adjusting the position of the pitot tube current meter; a motor of the wind tunnel adopts a centrifugal frequency convertion draught fan, and the centrifugal frequency convertion draught fan is connected with the auxiliary control system; when being calibrated, the pitot tube current meter is installed on the measuring working table, and a control circuit of the pitot tube current meter is connected with the auxiliary control system; after the pitot tube current meter is installed on the measuring working table, a pressure sampling opening of the pitot tube current meter is located in a steady flow area of a wind outlet of the wind tunnel, and the pressure sampling openingof the pitot tube current meter is perpendicular to the wind outlet of the wind tunnel. The calibration device of the pitot tube current meter solves the problems that an existing looped wind tunnel-sealed wind tunnel for calibrating the current meter is complex in structure and high in manufacturing cost, is easily affected by a lot of factors, complex to operate and large in floor space.

Description

technical field [0001] The invention belongs to the technical field of metering technical institutions and environmental protection monitoring systems, and relates to a verification device and method for a pitot tube flow meter. Verification of instruments or equipment. Background technique [0002] Today, as environmental pollution continues to increase, people are looking for various methods to control or reduce pollution. In addition to fixing pollution sources, SO 2 , NO x In addition to real-time monitoring of parameters such as smoke and dust, it is also necessary to monitor the flow rate, pressure, temperature and other parameters of the flue gas in order to adjust the combustion situation of the boiler and the emission of flue gas in time. In my country, the concentration and total amount of pollutants discharged from fixed pollution sources are controlled, and the flow rate (flow rate) of exhaust gas is an important parameter to determine the total amount of pollu...

AI Technical Summary

Problems solved by technology

However, the current loop-type wind tunnel-enclosed wind tunnel used for current meter verification has problems such as complex structure, high production cost, many influencing factors, complicated operation, and large floor space.

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