A liquid pressure monitoring system in a closed container

Abstract

The invention discloses a liquid pressure monitoring system in an airtight container, comprising: a front-end detection module composed of detection sub-modules mounted on the outer wall of each airtight container, an information transfer module composed of a plurality of intermediate rotor modules, and an information transfer module Monitoring and control terminal for short-range wireless connection. Each detection sub-module is composed of an ultrasonic sensor, a radio frequency tag and a microcontroller, which detects the real-time pressure of the liquid in the airtight container and transmits it to the information transfer module in the form of radio frequency; each middle rotor module is composed of a radio frequency reader and micro-controller The second structure of the device reads the pressure data of the radio frequency tag and sends it wirelessly to the monitoring and control terminal; the monitoring and control terminal controls the information transfer module to work, receives, stores, processes and analyzes the real-time pressure data sent by the middle rotor module, and judges the airtightness The pressure state of the container. The system can monitor the pressure change of the liquid in the airtight container in real time, for a long time or as required, and the measurement result is accurate and reliable.

Description

technical field [0001] The invention belongs to the technical field of pressure measurement, and in particular relates to a liquid pressure monitoring system in a closed container. Background technique [0002] There are two methods of measuring liquid in a closed container: invasive manometric method and non-invasive manometric method. Among them, the interventional pressure measurement method needs to open an opening on the airtight container to be tested, so that the pressure sensitive element can directly contact the liquid in the airtight container, so that the pressure value can be read directly. This kind of technology is relatively mature, and the equipment cost is relatively low, but The accuracy and reliability of pressure measurement are unpredictable; in addition, if the closed container is a high-pressure, flammable and explosive liquid, the danger of using invasive pressure measurement method is quite high. The traditional non-intrusive pressure measurement me...

AI Technical Summary

Problems solved by technology

This type of method can only measure containers with small diameters (about a dozen to tens of millimeters), thin walls (wall thickness less than 5 mm), and elastic deformation of the outer wall due to changes in internal liquid pressure above the micron level.

Large-diameter or thick-walled rigid containers have almost zero elastic deformation of the outer wall when the internal liquid pressure changes, which cannot be measured by traditional non-invasive pressure measurement methods

At present, there are also some instruments that measure pressure outside the ultrasonic tube, but they are only independent pressure measuring instruments. Each measurement requires manual installation of the instrument, which is inefficient, consumes a lot of manpower and material resources, and has high measurement costs.

[0003] Moreover, the above methods are all manually measured when needed, and real-time monitoring and long-term monitoring cannot be achieved.

For some harsh environments or some special environments, it is not suitable for long-term monitoring by staff, and cannot meet the requirements of real-time or long-term monitoring of liquids in some special environments

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