On-line grain moisture measuring instrument

Abstract

The invention discloses an on-line grain moisture measuring instrument in the field of grain moisture measuring devices. The measuring instrument comprises a detection circuit and a rotary driving device, wherein an output end of the rotary driving device is connected with a spiral shaft; a threaded sleeve is arranged outside the spiral shaft in a matching manner; the two ends of the threaded sleeve are connected with the rotary driving device and an annular electrode respectively; the spiral shaft comprises a hole shrinkage section, a screw section and a plain shaft section which are sequentially connected into a whole; the threaded sleeve is coated outside the screw section and the plain shaft section; the inner side of the threaded sleeve is connected with a carbon brush in an insulating manner; a hopper is arranged on the upper side of the threaded sleeve; the hole shrinkage section is inserted into a circular hole formed in the center of the annular electrode; an annular discharge channel is reserved between the hole shrinkage section and the circular hole; the annular electrode and the spiral shaft serve as two electrodes of a measuring resistor and are connected with the detection circuit; and a temperature sensor is arranged on the threaded sleeve. The measuring instrument sufficiently extrudes grain, so that the grain is uniformly distributed between the electrodes, an acquired measuring signal is more scientific and actual, and the moisture of the grain can be quickly and accurately measured in real time.

Description

technical field [0001] The invention relates to a grain moisture measuring device, in particular to an online grain moisture measuring instrument. Background technique [0002] Grain drying is an important link in the processing of agricultural products. According to statistics, the annual crop mold and rot loss in my country reaches 5 million to 10 million tons, which is estimated to account for 1.5% to 3% of the total grain output. In southern provinces such as Jiangsu, Zhejiang, Anhui, and Hubei, where the rainy season is long, the annual loss of grain mold and rot is as high as about 10%. But so far, grain drying is still a relatively weak link in my country's agricultural production. The main problems are: insufficient drying capacity, low efficiency and poor quality of dried material. The well-developed automatic control equipment is of great significance to ensure the quality of grain after drying, reduce operating costs and increase productivity. Therefore, fast,...

AI Technical Summary

Problems solved by technology

The main problems are: Insufficient drying capacity, low efficiency and poor quality of dried material

This technology uses the signal processing algorithm and the method of averaging temperature values ​​to eliminate the impact of impurities and temperature on grain moisture, but this method of rolling and rolling the cylindrical electrodes inwards at the same time will cause the grain to measure the channel between the cylindrical electrodes. Problems such as uneven distribution of grains, incomplete rolling of grains, and unsteady and orderly measurement process eventually lead to errors and inaccuracies in the collected resistance signals, which have a great impact on the measurement results of grain moisture content.

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