Device for measuring moisture content of grain using capacitive method

By optimizing the structure of the capacitance-based grain moisture measuring device and using platinum black electrodes and AD5933 chips, the problems of large size and inconvenient operation of traditional devices have been solved, and portable high-precision measurement has been achieved.

CN224303619UActive Publication Date: 2026-05-29HENAN UNIVERSITY OF TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
HENAN UNIVERSITY OF TECHNOLOGY
Filing Date
2025-05-01
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Traditional capacitance-based grain moisture measuring devices have an unreasonable structural layout, resulting in an excessively large size that is inconvenient to operate.

Method used

A device comprising a container, electrode plates, a printed circuit board, and a temperature measuring rod is designed. A column is formed at the bottom of the container to mount the printed circuit board, and an impedance measurement circuit is formed between the electrode plates. Combined with a temperature sensing unit and a main control circuit, a high-sensitivity platinum black electrode and an AD5933 chip are used for capacitance measurement.

Benefits of technology

It achieves a more rational structural layout, reduces costs, is suitable for portable operation, and improves measurement accuracy and sensitivity.

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Abstract

The utility model discloses a device for measuring the moisture content of grain, including container, electrode plate still includes the printed circuit board for installing the control circuit of bearing, the middle part of container is provided for loading temperature sensing unit's temperature measurement stick, the downward extension of container forms a plurality of stand, each stand forms the space for placing the installation printed circuit board below the container. The utility model discloses when using, compared with traditional pin type grain moisture tester, the structure arrangement of this scheme is relatively simple, need not be limited to fixed instrument operating platform, and the layout structure is more reasonable, and the cost is reduced significantly, has good popularization prospect.
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