| 摘要 |
1. Reflectrometric humidity meter for capillary-porous matter, in particular soil, consisting of a sensor containing a waveguide, connected to the sampling head via a feeder, the head being supplied with pin-type pulses from a pin-type pulse generator and delayed pin-type pulses from a delayed pin-type pulse generator, these being activated by pulses from a control circuit, whose output is connected to the input of the pin-type pulse generator and - via a delaying circuit - to the input of the delayed pin-type pulse generator, and the second output of the control circuit is connected to the cancelling input of the sampling head, according to patent no. 154 440, characterized in that the control circuit consists of a microprocessor controller (5) coordinating the cooperation of the sampling head (2) and both pin-type pulse generators (3) and (4), while the triggering input (11) of the pin-type pulse generator (3) is connected to the controller (5) via a delaying line (12), the triggering input (13) of the delayed pin-type pulse generator (4) being connected to the controller (5) via a delaying circuit (14), whose input (15) controlling the delay brought about by that circuit is connected to the controller (5) via a digital-analogue converter (16), the sampling head (2) being connected...<IMAGE>
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