On-line liquid detection device and density calibration system and density calibration method thereof

Abstract

The invention provides an on-line liquid detection device and a density calibration system and a density calibration method thereof. The on-line liquid detection device comprises a composite sensor, a data output system, an electronic warehouse connected with one end of the measuring rod, a liquid level floater, a density floater and a temperature sensor. The composite sensor comprises a measuring rod, a permanent magnetic ring is fixed in the liquid level floater, the level liquid floater is sleeved on an outer pipe of the measuring rod freely, the density floater is arranged below the liquid level floater and sleeved on the outer pipe of the measuring rod freely, a permanent magnetic ring is fixed in the density floater, the temperature sensor is arranged in the measuring rod and installed on a protection sleeve, and the temperature sensor is electrically connected with the electronic warehouse. The density calibration system comprises an upper computer, a composite sensor and a calibration barrel. The on-line liquid detection device can achieve on-line detection on various parameters of liquid, the on-line detection is low in cost, high in accuracy and high in resolution, and the on-line liquid detection device can be used in the fields of gas stations, petrochemical engineering, medicine, food and beverage processing and the like.

Description

technical field [0001] The invention relates to the field of liquid multi-parameter detection, in particular to a high-precision on-line liquid detection device for on-line detection of liquid (such as oil) liquid level, density and temperature and its density calibration system and method. Background technique [0002] In the refined oil transportation and distribution industry, situations such as running, leaking, dripping, leaking, and stealing occur from time to time, causing great economic losses to the relevant companies. In order to reduce man-made loss during transportation and monitor the quality and quantity of oil products in real time, it is urgent to install special sensors and on-board monitoring systems on tank trucks to detect oil level, density and temperature online, and process data in time to effectively monitor Changes in the total amount of oil products during transportation, alarm for abnormal situations, and strengthen the supervision of oil product t...

AI Technical Summary

Problems solved by technology

Obviously, the liquid density and the change of the float spacing are approximately inversely proportional (because the immersion depth of the liquid level float also changes with the liquid density, so it is only an approximation), only a simple coefficient K is used to calculate the instantaneous density, and the relationship is linear by default. Proportional, will lead to obvious nonlinear error, can not guarantee high-precision measurement

[0006] In addition, the patent number is "ZL201020171364.3", and the Chinese invention patent named "Digital Magnetostrictive Liquid Level Sensor" can only measure liquid level and temperature , the density of the liquid cannot be measured simultaneously

Therefore, the liquid level, density and temperature measurement methods based on the principle of magnetostriction in the prior art have some shortcomings in terms of structural design and density calculation, which is not conducive to the realization of high-precision liquid level and density measurement.

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