Liquid flow monitoring system
The proposed technical solution relates to measuring technology and is intended for measuring levels of measured medium in various branches of industry. The technical problem solved by the claimed invention is the production of a capacitive level sensor which demonstrates high operational reliability and provides highly accurate measurements. The technical result achieved by using the claimed invention consists in overcoming the disadvantages of the prior art, increasing the reliability and manufacturability of the design and thus increasing the accuracy of interface level measurements.
1. A liquid flow monitoring system comprising one or more capacitive level sensors, wherein the sensors are configured to communicate with a server to provide user information about the liquid flow through a reservoir in which said sensor is installed, and wherein each said capacitive level sensor comprising:
a base;
a sensitive element;
therewith the base comprises at least:
first part having a recess with a cover to hermetically house a computing unit, as well as a hole for the computing unit's output cable;
second part having
holes for expansion sleeves mostly in the center, in the area of the first part,
holes for fasteners in the side,
vent holes in the lateral side;
therewith the sensitive element is an electrode housing, which is a metal section formed by at least two tubes that are connected to each other at least partially along the length of said metal section, which comprises at least one stiffener connecting at least the two adjacent tubes of the section;
therewith each tube of the section has a slit aligned axially with the corresponding vent hole in the lateral side and arranged at least partially lengthwise at least in one side adjacent to the measured medium;
therewith the electrode housing contains electrodes rigidly fixed in each tube of the section, and these electrodes are metal tubes having the same unit-length capacitance but differing in their length, and the main electrode is mostly as long as the electrode housing, and each compensation electrode is shorter than the main electrode;
therewith the sensitive element is connected to the base through holes for fasteners;
therewith the main electrode and each compensation electrode are connected to the computing unit by means of metal rods connected to expansion sleeves, which are connected to holes for expansion sleeves.
2. The system of claim 1 , wherein the base is made of a metal or copolymer or combinations thereof.
3. The system of claim 1 , wherein the connection between the metal rods and expansion sleeves is a thread joint.
4. The system of claim 1 , wherein the expansion sleeves are made of a dielectric material.
5. The system of claim 4 , wherein the connection between the expansion sleeves and holes for expansion sleeves is a thread joint.
6. The system of claim 5 , wherein the thread joint between the expansion sleeves and holes for expansion sleeves contains a sealant.
7. The system of claim 4 , wherein the expansion sleeves have sealing rings.
8. The system of claim 1 , wherein the hole located in the recess and intended for the output cable of the computing unit contains a sealant.
9. The system of claim 1 , wherein the vent holes are further arranged asymmetrically in terms of their vicinity to the base.
10. The system of claim 1 , wherein the main electrode and each compensation electrode are covered with an insulation wrap.
11. The system of claim 1 , wherein the main electrode and each compensation electrode and the electrode housing are made of the same material.
12. The system of claim 1 , wherein each tube of the section has a slit along its entire length at least in one side adjacent to the measured medium.