Corncob moisture content measurement device and corncob moisture content measurement method

Abstract

The invention provides a corncob moisture content measurement device and method. A measurement circuit comprises a high-frequency signal oscillating source, a transmission line, a measurement electrode, a first detection circuit, a second detection circuit and a calculation circuit; the high-frequency signal oscillating source, the transmission line and the measurement electrode are connected in sequence; one end of the first detection circuit and one end of the second detection circuit are connected to two ends of the transmission line respectively; the other ends of the first detection circuit and the first detection circuit are connected with input of the calculation circuit respectively; the measurement electrode is in contact with surfaces of corncobs and is used for outputting corresponding output resistance according to the moisture content of the corncobs, and generating a reflection signal when a high-frequency sine wave signal which is generated and transmitted by the high-frequency signal oscillating source is received and the resistance of the transmission line is not matched with the output resistance of the measurement electrode; forward and backward signals generate moving standing waves on the transmission line; alternating-current signals at two ends of the transmission line, which are detected by the two detection circuits, are converted into direct-current signals, and voltage values corresponding to the signals are transmitted to the calculation circuit; the calculation circuit is used for calculating pressure difference value output according to the voltage values. The corncob moisture content measurement device and method can realize rapid, lossless and accurate measurement.

Description

technical field [0001] The invention relates to the technical field of agriculture, in particular to a device for measuring the moisture content of corn ears and a method for measuring the moisture content of corn ears. Background technique [0002] Moisture content is an important trait parameter that needs to be obtained in the process of maize breeding. [0003] At present, corn breeding institutions adopt the method of threshing first and then measuring moisture in corn. This method cannot guarantee the timeliness of obtaining corn moisture, and cannot realize the in vivo measurement of corn moisture. At present, some researchers use pin-type probes to measure the moisture of corn kernels to a certain extent to achieve the measurement of corn ear moisture, but the measurement accuracy is low. The bigger problem is that the integrity of corn kernels is destroyed, and it is impossible to achieve non-destructive corn ear moisture. measurement, difficult to use widely in ma...

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Problems solved by technology

[0003] At present, corn breeding institutions adopt the method of threshing first and then measuring the moisture content of corn. This method cannot guarantee the timeliness of obtaining the moisture value of corn, nor can it realize the in vivo measurement of corn moisture.

At present, some researchers use pin-type probes to measure the moisture of corn kernels to a certain extent to achieve the measurement of corn ear moisture, but the measurement accuracy is low. The bigger problem is that the integrity of corn kernels is destroyed, and it is impossible to achieve non-destructive corn ear moisture. measurement, difficult to use widely in maize breeding

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