Online monitoring and early warning system based on liquid level sensor

Abstract

The invention discloses an online monitoring and early warning system based on a liquid level sensor, which comprises a control system. The control system comprises a liquid level monitoring unit, a central processing unit, a data processing unit, a numerical value generation unit, a comparison value setting unit, a numerical value comparison unit, a difference value generation unit, a data feedback unit, an alarm unit, a data storage unit and a liquid level display unit, wherein the output end of the liquid level monitoring unit is electrically connected with the input end of the central processing unit. The invention relates to the technical field of online monitoring. According to the online monitoring and early warning system based on the liquid level sensor, through cooperation of thefirst-level alarm module, the second-level alarm module, the third-level alarm module, the first difference module, the second difference module and the third difference module, when the water levelis monitored, three different types of alarms can be sent out according to the situation that the water level exceeds a warning value; therefore, the specific water level situation can be distinguished more easily, the water level can be monitored in a graded mode, and monitoring limitation is small.

Description

technical field [0001] The invention relates to the technical field of on-line monitoring, in particular to an on-line monitoring and early warning system based on a liquid level sensor. Background technique [0002] Liquid level sensor (static pressure liquid level gauge / liquid level transmitter / liquid level sensor / water level sensor) is a pressure sensor for measuring liquid level. The static pressure input liquid level transmitter (liquid level gauge) is based on the principle that the measured liquid static pressure is proportional to the height of the liquid. It adopts foreign advanced isolated diffused silicon sensitive elements or ceramic capacitor pressure sensitive sensors to convert the static pressure The voltage is converted into an electrical signal, and then converted into a standard electrical signal (generally 4-20mA / 1-5VDC) after temperature compensation and linearity correction. It is divided into two categories: one is contact type, including single flang...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides an online monitoring and early warning system based on a liquid level sensor, which solves the problem that the water level cannot be monitored in stages. The limitations are large, and when testing, the water surface is generally affected by the wind and will fluctuate, which will cause large errors and affect the accuracy of the measurement.

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