| 摘要 |
FIELD: measurement technology. ^ SUBSTANCE: moisture tester can be used for testing moisture of soil, seeds and various loose materials, for example, in agriculture or construction. Reflectometer moisture tester has high frequency branch box. First tapping of branch box is connected with input of stroboscopic reading device. Synchronizing output of the reading device is connected with first output of synchronizer and output of reading device is connected with oscillograph. Second tapping of branch box is connected with output of probing pulse oscillator. Triggering input of oscillator is connected with second output of synchronizer. Third tapping of branch box is connected with connecting cable through mating unit. Connecting cable is connected to primary converter, which is made in form of delay line with distributed parameters. Input ends of delay line are made open or closed. Delay line is made in form of section of coaxial line, which has wire spiral with isolated turns at inner rod made of isolating, dielectric or high-frequency-electromagnetic material. It also has external screen made of external rod conductors disposed symmetrically along circle relatively internal rod. Ends of rod conductors fastened to base are closed by link which link together with spiral wire forms input ends of delay line. Medium to be measured is placed between internal rod and external rod conductors. ^ EFFECT: improved precision of testing; reduced sizes. ^ 2 cl, 2 dwg
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