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Liquid level detection device and method

A technology of liquid level detection and liquid level column, which is applied in the direction of measuring device, liquid/fluid solid measurement, liquid level indicator for physical variable measurement, etc. It can solve the problems of complex measuring device, inapplicability, and low precision, and achieve overall Simple structure, low power consumption, easy installation

Active Publication Date: 2021-05-07
杭州热博科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When the direct-reading liquid level gauge is applied, it is necessary to punch a hole on the side wall of the container to be measured, and use a transparent material to seal the hole, or directly immerse the liquid level gauge vertically in the liquid level to be measured. Therefore, the direct-reading liquid level The disadvantage of the position meter is that it cannot be used in a closed but not perforated measurement environment
[0004] Non-direct-reading liquid level gauges are mostly float level gauges, ultrasonic liquid level gauges, and radar level gauges. For float level gauges, on the one hand, they are larger in size, and the float itself has a certain weight and higher accuracy. Low, it is more suitable for measuring the points to be measured with high concentration, large volume and low requirements for measurement accuracy; and ultrasonic liquid level gauge, due to its own characteristics, in the case of small range, its The measurement accuracy is difficult to guarantee; for the radar level gauge, due to the launch angle of the radar wave, it is necessary to find a suitable vertical plane when measuring, so it is not suitable for measuring the point to be measured with a gentle slope and a large amplitude
Measuring devices are complex and expensive

Method used

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  • Liquid level detection device and method
  • Liquid level detection device and method
  • Liquid level detection device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] refer to figure 1 , a liquid level detection device 1, the device includes a liquid level column 13, a liquid level detection module 11, a liquid level display module 12 and a voice broadcast module 14, wherein the liquid level column 13, the liquid level display module 12 and a voice broadcast module 14 are all connected with the liquid level detection module 11;

[0045] The liquid level column 13 includes a conductor core and an insulating layer wrapped on the side wall of the conductor core. The conductor core is immersed in the liquid to be measured and forms a capacitor with the liquid to be measured. The liquid level detection module 11 detects the inductive capacitance of the liquid level column 13 to obtain the depth of the liquid level column 13 immersed in the liquid to be measured, and then measures the liquid level of the liquid to be measured.

[0046] The liquid level display module 12 displays the liquid level value of the liquid to be tested measured b...

Embodiment 2

[0053] A liquid level detection method, such as Figure 4 shown, including the following steps:

[0054] S100, immersing the conductor core of the liquid level column in the liquid to be measured, and the conductor core is immersed in the liquid to be measured to form a capacitor with the liquid to be measured;

[0055] S200. The liquid level detection module measures the inductive capacitance value of the conductor core through the liquid level detection terminal to obtain the inductive capacitance value;

[0056] S300. Obtain the height of the liquid level column submerged in the liquid to be measured according to the sensing capacitance value.

[0057] We can approximate the calculation of the inductive capacitance of the wire to the calculation of the capacitance of a coaxial cylindrical capacitor, namely:

[0058] C=2πεL / ln(R1 / R2);

[0059] In the formula, L is the length of the overlapping part of the two cylinders; R1 is the diameter of the outer cylinder electrode; ...

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Abstract

The invention discloses a liquid level detection device and method, comprising a liquid level column and a liquid level detection module, the liquid level detection module is provided with a liquid level detection end, and the liquid level column is connected to the liquid level detection end; the liquid level The column includes a conductor core, the conductor core is immersed in the liquid to be tested to form a capacitor with the liquid to be tested, and the inductive capacitance value of the capacitor changes with the depth of the conductor core immersed in the liquid to be tested, and the liquid level detection module passes The liquid level detection end measures the inductive capacitance value of the conductor core, obtains the depth of the conductor core immersed in the liquid to be measured according to the measured inductive capacitance value, and then obtains the liquid level height of the liquid to be measured. According to the principle that the induction capacitance of the liquid level column will change accordingly when the liquid level column is immersed in the liquid to be tested, the capacitance of the liquid level detection terminal is measured by the liquid level detection module, and the height of the liquid level is obtained. The overall structure is simple, the power consumption is small and the cost is low.

Description

technical field [0001] The invention relates to liquid level measurement technology, in particular to a liquid level detection device and method. Background technique [0002] Existing liquid level detection devices are generally divided into two types: direct-reading liquid level gauges and non-direct-reading liquid level gauges. [0003] When the direct-reading liquid level gauge is applied, it is necessary to punch a hole on the side wall of the container to be measured, and use a transparent material to seal the hole, or directly immerse the liquid level gauge vertically in the liquid level to be measured. Therefore, the direct-reading liquid level The disadvantage of the potentiometer is that it cannot be used in a measurement environment that is closed but cannot be drilled. [0004] Non-direct-reading liquid level gauges are mostly float level gauges, ultrasonic liquid level gauges, and radar level gauges. For float level gauges, on the one hand, they are larger in s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F23/26
CPCG01F23/263
Inventor 汪卫军
Owner 杭州热博科技有限公司