Non-contact liquid level sensor and intelligent water cup comprising the same

Abstract

The invention discloses a non-contact liquid level sensor. The non-contact liquid level sensor comprises at least one capacitor sensor. Each capacitor sensor comprises a first electrode plate, a second electrode plate and a dielectric medium arranged between the first electrode plate and second electrode plate, wherein the outer side of the second electrode plate is covered with the first electrode plate, the second electrode plate is attached to the side wall of a container, and the length of the first electrode plate in the transverse measuring direction is larger than that of the second electrode plate in the transverse measuring direction. The invention further discloses an intelligent water cup. The intelligent water cup comprises a cup shell, an inner container arranged in a cup body and the liquid level sensor. The liquid level sensor is attached to the side wall of the inner container. The novel capacitor electrode plates are adopted in the liquid level sensor, liquid level measuring can be achieved when the sensor is attached to the cup wall, the structure is simple, installation is convenient, and an original structure of the water cup will not be affected. The intelligent water cup is compact in overall structure, and the water level of the water cup can be accurately measured.

Description

technical field [0001] The invention relates to a sensor, in particular to a non-contact liquid level sensor. [0002] The invention also relates to an intelligent water cup. Background technique [0003] Common liquid level sensors such as figure 1 As shown, inside the container, a capacitor is formed by the inner electrode 100 and the container wall 200 made of conductive material. When a measuring voltage with a fixed frequency is applied to the internal electrode 100, the distribution of the internal electric field lines is as follows: figure 2 As shown, the current flowing through the capacitor at this time depends on the height of the liquid medium between the capacitor electrodes and is proportional to it, that is, based on the change of the dielectric constant of the dielectric, the capacitance changes, and then the liquid level is measured. [0004] This kind of liquid level sensor is generally used to measure the liquid level of large containers, but because of...

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Problems solved by technology

[0004] This kind of liquid level sensor is generally used to measure the liquid level of large containers, but because of its large volume, it is difficult to integrate with the structure of the water cup, so it cannot be used for the measurement of the liquid level of the water cup, and because this kind of sensor is a contact sensor, If it is applied to the inside of the water cup, the liner of the water cup will be very inconvenient to clean

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