Communications: directive radio wave systems and devices (e.g. – Determining distance – Material level within container
Reissue Patent
2003-10-07
2008-03-04
Sotomayor, John B (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Determining distance
Material level within container
C342S135000, C342S082000, C342S084000, C342S087000, C342S085000
Reissue Patent
active
RE040128
ABSTRACT:
A radar gauge adapted to sense fluid level in a tank and including a radar gauge circuit in which radar transmission and level sampling are controlled by a transmit frequency and a sample frequency respectively. A first frequency separation between first and second frequencies is controlled by a control input. The first and second frequencies can be divided to generate the transmit and sample frequencies, separated by a second frequency separation. At least one frequency difference is evaluated and the evaluation used to generate the control input, stabilizing the first frequency difference, and to correct the gauge output.
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Rosemount Inc.
Sotomayor John B
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