Method for obtaining liquid level data from capacitance level transducer and device

A liquid level sensor, capacitive technology, applied in the field of liquid level sensors, can solve the problems of complex calibration operation and poor measurement accuracy, and achieve the effect of simple calibration operation and high measurement accuracy

Inactive Publication Date: 2017-12-15
深圳市鼎丰泰达科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a capacitive liquid level sensor with high measurement accuracy and relatively simple correction operation for the defects of the prior art, such as poor measurement accuracy and complicated correction operation. Method and device for liquid level data

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  • Method for obtaining liquid level data from capacitance level transducer and device
  • Method for obtaining liquid level data from capacitance level transducer and device
  • Method for obtaining liquid level data from capacitance level transducer and device

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Embodiment Construction

[0036] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0037] like figure 1 As shown, in a method and an embodiment of the device for obtaining liquid level data in a capacitive liquid level sensor of the present invention, the method includes the following steps:

[0038] Step S11 obtains the initial capacitance value, including zero value and full value: In this embodiment, the method is applicable to a capacitive liquid level sensor with the following structure, the sensing part of the sensor has a concentric structure with the same The outer shell is used as an electrode, while the inner core is divided into two sections, and the two sections are connected together by a connector made of insulating material. The two sections have the same size and are used as lead-out wires respectively. One electrode on the two outer sides, so that the two sections of the inner core and the outer shell respectively for...

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Abstract

The invention relates to a method for obtaining liquid level data from a capacitance level transducer. The method includes the following steps of measuring the capacitance values, including the first capacitance value and the second capacitance value, of the liquid level sensor put in to-be-measured liquid, judging whether the obtained first capacitance value is larger than a set first threshold or not, if yes, executing the next step, if not, comparing a current full-level capacitance value with the obtained second capacitance value and calculating the current liquid level value of the liquid, and comparing the obtained second capacitance value as the current full-level capacitance value with the sum of the first capacitance value and the second capacitance value to obtain the calibrated current liquid level value. The invention further relates to a device for implementing the method. The method and device have the advantages that the measurement accuracy is high and correction operation is simple.

Description

technical field [0001] The invention relates to a liquid level sensor, more specifically, to a method and device for obtaining liquid level data in a capacitive liquid level sensor. Background technique [0002] For the existing capacitive liquid level sensor, because it usually adopts a continuous inner core structure, that is to say, the inner core of the existing capacitive liquid level sensor is not segmented, a whole The inner core and the outer shell form a capacitor, and the liquid level is measured from zero to full by this capacitor, based on the current capacitance value of the capacitor and the pre-written full level (that is, the liquid completely submerges the sensing part of the sensor) capacitance Value comparison to get the current liquid level value. But in this case, due to the variability of the added liquid and some changes brought about by long-term use, for example, the copper foil wrapped on the outer surface of the insulating rod is corroded, oxidize...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F23/26
CPCG01F23/263
Inventor 田方敏朱金苹
Owner 深圳市鼎丰泰达科技有限公司
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