A tuning fork density meter and its coefficient calibration method

Abstract

The invention discloses a tuning fork density meter and its coefficient calibration method. The tuning fork density meter includes a transmitter, a tuning fork sensing device, a connecting column connecting the transmitter and the tuning fork sensing device, and a bubble eliminating device. The tuning fork sensing device includes a tuning fork seat fixed on the quick-connect flange of the connecting column, a tuning fork body integrally connected with the tuning fork body, a strain gauge arranged at the inner end of the bottom hole at the root of the tuning fork body, and A temperature sensor, the tuning fork sensing device is arranged inside the air bubble eliminating device. Compared with the prior art, the strain gauge is closely attached to the root of the tuning fork fork body, which can more sensitively capture the change signal of the resonant frequency of the tuning fork fork body, and improves the accuracy and stability of density measurement. Calibrate the coefficient of the tuning fork density meter, eliminate the interference of external factors (such as temperature, current, etc.) on the density meter, and improve the accuracy of measurement.

Description

technical field [0001] The invention relates to the technical field of fluid density measurement, in particular to a tuning fork type density meter and a coefficient calibration method thereof. Background technique [0002] The tuning fork density meter is a density meter designed using the principle of vibration. Its working principle is to use two piezoelectric crystals, one of which produces a fixed vibration frequency. When the fluid passes through the tuning fork fork, the vibration frequency changes, and the other The piezoelectric crystal detects the current vibration frequency, so that the density of the medium can be calculated through circuit operations. However, when the fluid passes through the tuning fork body, the generated air bubbles and fluid turbulence will interfere with the resonant frequency of the tuning fork body, resulting in insufficient measurement accuracy and stability. The existing tuning fork density meter is not sensitive enough to capture the...

AI Technical Summary

Problems solved by technology

However, when the fluid flows through the tuning fork body, the generated air bubbles and fluid turbulence will interfere with the resonance frequency of the tuning fork body, resulting in insufficient measurement accuracy and stability

Due to the improper setting position of the piezoelectric crystal in the existing tuning fork density meter, it is not sensitive enough to capture the change signal of the resonance frequency of the tuning fork body

And the number of times the density meter is used, the change of the measuring liquid, the change of the external temperature, and the change of the circuit of the density meter itself may cause the change of the measurement accuracy.

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