Single bus communication-based grain moisture measurement chip

Abstract

The invention discloses a single bus communication-based grain moisture measurement chip. The chip is arranged in outer measurement tubes, the outer measurement tubes comprise a first outer measurement tube and a second outer measurement tube, a cable electrically connected with the chip penetrates through the first outer measurement tube and the second outer measurement tube in sequence, the first outer measurement tube is used as an anode, the second outer measurement tube is used as a cathode, the chip comprises a core data processing unit, a power management unit, a moisture sensor core, atemperature sensor core and an EEPROM storage unit, and the core digital processing unit is respectively connected with a first register, a second register, a moisture sensor processing unit, a 64-bit chip ID, signal anti-interference and ESD. The single bus communication-based grain moisture measurement chip can measure moisture of multiple points in a bin accurately, further, the chip is smalland low-cost, integrates temperature and moisture and calibration functions, and is suitable for large-area use.

Description

technical field [0001] The invention belongs to the technical field of grain moisture detection, and in particular relates to a single-bus communication chip for measuring grain moisture. Background technique [0002] Moisture in grain is divided into free water and bound water according to its physical properties. Bound water is a molecule adsorbed in grain cells or in the molecular structure of grain. It is formed through chemical action and has nothing to do with the detection of grain moisture content. Free water refers to the moisture condensed in the capillary and molecular gap inside the grain particles, which is formed by physical adsorption. Grain moisture detection is to detect free water in grain. When the moisture content of the grain is too high, the grain becomes unstable, which can easily cause heating of the grain pile, mildew of the grain, and the breeding of bacteria and pests, which have a great impact on the quality of the grain. When the moisture conte...

AI Technical Summary

Problems solved by technology

[0003] The traditional grain moisture detection mostly removes the moisture in the grain directly through drying or chemical methods, and detects the absolute moisture content of the sample. Although the detection accuracy is high, it is time-consuming.

Traditional capacitive moisture detectors are mainly cup-type. When testing, grain needs to be poured into the interior for measurement, and it is difficult to achieve online measurement in the grain depot.

In recent years, many modular test structures have been produced based on this. Although multi-point measurement can be realized, product consistency is difficult to guarantee and the cost is high.

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