Double-cylinder type high-precision liquid velocity-flow meter and velocity-flow value output method

Abstract

The invention discloses a double-cylinder type high-precision liquid velocity-flow meter comprising a differential-pressure type velocity-flow signal generator, a differential-pressure high liquid-gas conversion cylinder, a differential-pressure low liquid-gas conversion cylinder, a differential pressure sensor and a micro-computer. Both the cylinders are provided with air exhaust nozzles. The differential pressure sensor detects differential pressure of compressed air in the differential-pressure high liquid-gas conversion cylinder and compressed air in the differential-pressure low liquid-gas conversion cylinder. The micro-computer converts the differential pressure signals, detected by the differential pressure sensor, into velocity and flow. The double-cylinder type high-precision liquid velocity-flow meter integrates functions of a flow meter and a velocity meter, and preferably, functions in zeroing and freely selecting velocity or flow value for digital output. The invention further discloses a method for outputting the velocity-flow values converted from voltage analog signals in the same machine. According to the method, the double-cylinder type high-precision liquid velocity-flow meter is adopted, and the function and effect that the velocity / flow value digital display is freely selected in the same machine.

Description

technical field [0001] The invention relates to the field of experimental measurement, in particular to a double-barreled high-precision liquid velocity flow meter and a method for outputting flow velocity and flow values. Background technique [0002] The small flow, small pressure difference, high-precision digital display flow rate and flow measurement device for water flow in small pipelines is currently in a blank state. Take the small desktop hydrodynamics hydraulics teaching instrument as an example, because its pipe diameter is usually less than 30mm, the flow rate is 5-300ml / s, and the flow rate is often less than 2m / s, its pressure difference signal is often very small. [0003] Take traffic as an example: [0004] Most of the flow signal pressure difference generated by its differential pressure signal generator (such as Venturi, orifice plate, etc.) is only 0.1-80 cm water column, while the existing flow meter is to connect the sensor and the pressure difference...

AI Technical Summary

Problems solved by technology

[0005] As above, the above-mentioned problems also exist in the flow velocity measurement, because in the teaching experiment, the signal of the flow velocity measurement is often obtained by using the Pitot tube flowmeter, and the use range of the Pitot tube is just below 2 meters, and the maximum pressure difference is only 20 cm water column

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