High-precision liquid level, temperature, density multifunctional measuring system

Abstract

A high-precision liquid level, temperature, density multifunctional measuring system comprises a liquid level transducer, wherein the output signal of the liquid level transducer is transmitted to a signal processing and displaying circuit; a liquid level transducer shell is connected with a connection rod; the connection rod is connected with an anti-explosion junction box by an adapter; the signal processing and displaying circuit is fixed in the anti-explosion junction box; a contrast measurement sensor and a main liquid level measurement sensor, which are distributed up and down and are vertical to the liquid level, are packaged in the liquid level transducer shell; the back surface of the main liquid level measurement sensor is further provided with a temperature sensor; the signal processing and displaying circuit comprises two signal transducer units and is respectively connected with the main liquid level measurement sensor and the contrast measurement sensor; the two signal transducer units are connected with a main processor unit; the temperature sensor is connected with the main processor unit; and the main processor unit is connected with an LED (light emitting diode) display unit. The multifunctional measuring system is capable of synchronously measuring the liquid level, the density and the temperature of the liquid, and has the characteristics of high precision, high sensitivity and good linearity.

Description

technical field [0001] The invention belongs to the technical field of liquid level measurement, and in particular relates to a high-precision liquid level, temperature and density multifunctional measurement system. Background technique [0002] Liquid level measurement is an important detection index for enterprise automation. During the production process, the detection and control of the liquid level and interface of tanks, kettles, towers, etc. is of great significance to automated production. There are many types of liquid level measuring instruments on the market, and the differential pressure liquid level gauge is one of the most widely used types. It obtains liquid level information by measuring the hydrostatic pressure, and has the characteristics of simple structure, accurate measurement, and convenient installation and maintenance. , Widely used in chemical industry, metallurgy, power station, water conservancy, urban water supply and industrial wastewater and ot...

AI Technical Summary

Problems solved by technology

[0003] However, in the existing differential pressure level gauge liquid level calculation formula, a fixed liquid density is used. Generally, the density of the measured liquid is greatly affected by factors such as temperature, pressure, composition, etc., resulting in uncertain pressure measured by the pressure sensor. degree is relatively large

In occasions where high-precision measurement of liquid level is required, such as small tanks for diesel and gasoline, ordinary differential pressure liquid level gauges on the market cannot meet the requirements, and the existing liquid level gauges have single functions and cannot measure the density and temperature of liquids. and other information, it is impossible to give a comprehensive feedback on the liquid information

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