Measuring instrument and measuring method based on dielectric method for water content of flour or similar substance

Abstract

The invention discloses a measuring instrument and a measuring method for the water content based on a dielectric method to measure the water content of the flour or the similar substance. The measuring instrument for water content comprises a test circuit and a display circuit. The test circuit mainly comprises a signal source circuit, a parallel double rod probe, and a phase difference detectioncircuit using an AD8302. The display circuit comprises an ARM processor circuit and an LCD display screen. The measuring method comprises the steps: that parallel double rod probe is placed in the flour or the similar substance; a signal is generated by an oscillator employed by the signal source circuit; the signal is transmitted in a sample of the flour or the similar substance through the parallel double rod probe; the signal generated by the signal source and the signal transmitted by the probe are respectively detected by the phase difference detecting circuit; the phase difference is obtained; a calibration curve is drawn; and the water content value corresponding to the VPHS value on the calibration curve is calculated. According to the measuring instrument and the measuring methodbased on dielectric method for the water content of the flour or the similar substance, the rapid non-destructive detection of water content can be realized, the measuring instrument and the measuring method are not only economical and efficient, have high application value, and are worthy of popularization and application.

Description

Technical field [0001] The invention belongs to the technical field of measuring the moisture content of crops, and relates to a technique for measuring the moisture content of flour or similar substances, in particular to a moisture content measuring instrument and measuring method for flour or similar substances based on a dielectric method. Background technique [0002] Crop water content measurement technology, especially the measurement of water content of flour or similar substances, is widely used and has high application and economic value. For example, the measurement of the moisture content of flour plays an important role in the flour processing factory. The difference in water content of flour will affect the activity of yeast. The fermentation speed of dough with less water content is lower than that of dough with proper water content. In the same fermentation time, too little water content will result in insufficient gas production, and it will take a longer time. ...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies of the above-mentioned technologies, the present invention provides a method for measuring water content based on the dielectric constant of the medium and a water content measuring instrument based on the dielectric method, which are used to solve the problems in the existing traditional water content measurement methods and new water content measurement methods. Time-consuming, complex detection process, expensive measuring instruments, high requirements for measurement samples, etc.

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