Non-contact multi-gear liquid level switch and liquid level detection method

Through the non-contact multi-level level switch, the combination of the sensing surface, sensing chip, capacitance gear module and control module is used to solve the problem of failure of the level detection of the dewax agent, and the sensitivity adjustment and multi-level detection are realized, which improves the detection range and practicality of the level switch.

CN119714469APending Publication Date: 2025-03-28WUHAN YZY MEDICAL SCI & TECH
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Patent Information

Application Number
CN202411646930.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-18
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

In the prior art, the relative dielectric constant of the dewax agent is difficult to reach the detection threshold of conventional capacitive liquid level switches, resulting in the problem of detection failure.

Method used

A non-contact multi-speed liquid level switch is provided, including a sensing surface, a sensing chip, a capacitance gear module and a control module. By adjusting the capacitance of the capacitance gear module connected to the sensing chip, adjusting the sensitivity of the liquid level switch, and achieving multi-speed adjustment through a parallel capacitor path.

Benefits of technology

It effectively solves the problem of liquid level detection failure in the prior art, improves the detection range and practicality of the liquid level switch, and can be suitable for different types of liquid detection.

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Abstract

The invention relates to a non-contact type multi-gear liquid level switch and a liquid level detection method, and belongs to the technical field of liquid level detection.The non-contact type multi-gear liquid level switch comprises a sensing face used for generating a detection signal according to the liquid level; the sensing input end of the sensing chip is electrically connected with the sensing surface; the capacitance gear module comprises a plurality of capacitance paths which are connected in parallel and have different capacitance values, one end of the capacitance gear module is electrically connected with the sensing input end of the sensing chip, and the capacitance gear module is used for connecting a capacitor into the sensing chip so as to adjust the sensitivity of the non-contact multi-gear liquid level switch; the ADC pin of the control module is electrically connected with the other end of the capacitance gear module and used for adjusting capacitance, connected into the sensing chip, of the capacitance gear module, and the receiving pin of the control module is electrically connected with the output pin of the sensing chip and used for receiving a detection signal to achieve liquid level detection. The invention effectively solves the problem that the relative dielectric constant of the dewaxing agent in the prior art is difficult to reach the detection threshold value of the conventional capacitive liquid level switch, so that the detection fails.
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