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helmet. Due to a sharp decrease in the influence of soil on the signal, the
hodograph looping on large iron targets, such as pieces of roofing, agri-
cultural implements, crumpled buckets, partially broken cast irons, etc.,
has much greater visibility, which provides an additional identification
information for an experienced operator.
The most common variants of false signals when searching in the Deep
Program:
1.
One-sided clear color signal with arrow hodograph with no signal
during the reverse
movement of the sensor. When rechecking at 90
degrees (crosswise),
the signal is either absent or also one-way. Most
often, the fault of such
a false signal is a sharp drop in the ground, for
example, a small hill or a
large gauge, especially in wet
conditions.
2.
“Soil lens”
This is a special type of soil anomaly. It is able to give the target signal in
the Deep search mode. It is a local inclusion of a more conductive soil in
the composition of a less conductive continental layer. It can be formed
as a result of the occurrence of frost cracks and ice wedges of the ice age,
later melted and slowly replaced by red clay with a high content of fer-
rous mineral. It can also be formed as a result of the movement of part
of the soil by a glacier or landslide (mountainous areas) and as a result
of human activity. One example is the ancient pits excavated and buried
in the clay continent centuries ago. Such a ground anomaly can give an
explicit target signal, usually with an arrow hodograph and a VDI in the
range of +78 +84. That is, a signal similar to, for example, laying large
silver or copper coins. In this case, in normal mode, the device practi-
cally does not see the target (or sees very weakly). At the beginning of
digging in static mode, the device begins to clearly detect a target in the
excavation.
Based on the experience of testing DPs, the following methods for iden-
tifying such lenses are recommended.
When scanning from a height of 60-70 cm, the signal is clear and clear,
but with a decrease in scanning height (but not close to the ground), the
signal begins to “blur” and even disappear. At the same time, a metal
target, while lowering the scanning height, on the contrary amplifies its
