Electricity: measuring and testing – Of geophysical surface or subsurface in situ – Using electrode arrays – circuits – structure – or supports
Patent
1997-02-10
1998-11-24
Regan, Maura K.
Electricity: measuring and testing
Of geophysical surface or subsurface in situ
Using electrode arrays, circuits, structure, or supports
324713, 324694, 111118, 111903, G01R 2726, A01C 2300
Patent
active
058412824
ABSTRACT:
Device for measuring soil conductivity is comprised of a frame adapted to be conveyed over a ground surface and plurality of soil engaging coulters insulated from each other and insulatively mounted to this frame. This device also includes means for passing a current between a first pair of coulters through the soil and means for measuring this current. It further comprises means for measuring the resulting voltage between a second pair of coulters. This device for measuring soil conductivity also is comprised of electrical contact members which provide consistent electrical contact from the coulter to the means for measuring current and voltage. An electrical signal received by a coulter travels to a mounting flange and then to a dust cap. The dust cap passes this electrical signal to the spindle by way of a spring-loaded plunger. This electrical signal travels from the fixed spindle to the means for measuring current and voltage. This device is further able to calculate soil conductivity from the voltage and current measurements. In addition, the measurements from this device may be geo-referenced so as to produce a map showing the changes in soil conductivity or topsoil depth across a field. Furthermore, this device is capable of simultaneously measuring soil conductivity of at least two different soil depths in a single pass.
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Brochure -- Prescription Farming.TM. Systems, by Crop Technology, Inc.
Christy Colin
Lund Eric
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