Contact type sensing device and sensing method for water content of object

Abstract

The invention relates to a contact type sensing device and a sensing method for water content of an object. The device comprises a power unit, a sensing unit and a calculating unit. The sensing unit comprises a substrate and a copper foil that is configured on the substrate. The sensing unit is used to contact the object, the power unit is used to supply power to the copper foil, and the copper foil is electrified to form an equivalent capacitor. The equivalent capacitor has different capacitances due to water content of the object. The calculating unit is electrically connected to the sensing unit for analyzing the capacitance of the equivalent capacitor so as to calculate the water content of the object.

Description

technical field [0001] The present invention relates to a sensing device and method for moisture content of an object, in particular to a sensing device and sensing method for sensing the moisture content of the object by contacting the object. Background technique [0002] The types of the contact moisture sensor in the prior art include the following: (1) the sensing component is an insulating substrate with a circuit written on it, and a chemical substance, such as a polymer material, is arranged on the surface of the substrate to utilize the chemical substance The chemistry changes to represent the moisture content of the environment in which the sensing component is placed. (2) Use ceramic materials with circuit design to make sensing components, combine the porous water absorption characteristics of ceramics with the electric conductivity adjustment technology, and calculate the environment where the sensing components are located by using the changes in the electric c...

AI Technical Summary

Problems solved by technology

Secondly, the surface of the component is equipped with a contact water content sensor of chemical substances. It needs to sense the water content of the target object by contact, such as the water content of the land and the water content of the powder. However, these chemical substances will be exposed to the target object for a long time. Unnecessary chemical reactions are triggered, leading to the deterioration of chemical substances (deterioration of chemical substances, embrittlement, pulverization, etc.)

Similarly, ceramic sensing components are in contact with the target object for a long time and sense the moisture content of the target object around the clock. Therefore, the ceramic part of the component is also prone to deterioration, such as embrittlement or pulverization, resulting in a reduction in component life, and The component is also not stable enough when sensing moisture content

Third, contact sensors are often used to sense soil moisture content, but the low component life and component degradation make it difficult for such contact sensors to be used for long-term sensing of soil moisture content, and once the components deteriorate If the situation occurs, the sensed moisture content data must be abnormal and unavailable, so it is impossible to accurately measure the soil moisture content

Fourth, for targets such as soil, the composition of the liquid contained in it is relatively complex. However, this type of liquid also contains water, but most of the current water content sensors will exclude these non-pure water components, and the measured The moisture content is also subject to discussion

[0004] It can be seen that the above-mentioned existing contact type object moisture content sensing device and sensing method obviously still have inconvenience and defects in structure and use, and need to be further improved urgently.

In order to solve the above-mentioned problems, the relevant manufacturers have tried their best to find a solution, but for a long time no suitable design has been developed, and the general product has no suitable structure to solve the above-mentioned problems. This is obviously the relevant industry. Urgent problem

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