JRC NJJ-105 Handy Search, Руководство пользователя, Страница: 12 / 37

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1 Description of Equipment
This product is indispensable for repairing/rebuilding and maintaining reinforced
concrete structures using its accurate and speedy diagnostic technology.
This product (concrete internal probe vehicle) radiates electromagnetic waves
through the surface of concrete and receives reflected signals from objects found
inside such as reinforcing steel bars, cavities, or other objects that have different
electrical characteristics from concrete. Object position and depth are then displayed
and recorded as image data.
CAUTION
Judge the scan result with considering the depth sensing capability of this
product. Since the depth sensing capability of this product is subject to the
conditions of the object of investigation, judging the scan result with no
consideration of the depth sensing capability may cause the accidental cutting
of rebar.
1.1 Function
Table 1-1 shows functions and performances of this product.
Table 1-1 Functions and Performances of this product
No.
item Functions and Performances
1 Search method Electromagnetic wave radar method
2 Search object
Rebar (reinforcing steel bar), Polyvinyl-chloride pipe,
Cavity, etc.
3 Search depth
5 to 300mm for concrete having a relative dielectric
constant
＝
6.2 and the top rebar of diameter
≧
6mm
4 Depth resolution
Approx. 1 mm at the display range setting of Shallow
Approx. 2 mm at the display range setting of Deep
5
Horizontal
discrimination
resolution
≧
75mm for the scanned object located at depth < 75mm
≧
Depth of the scanned object for the object located at
depth
≧
75mm
※
Typical performance for the reference concrete:
This product allows the user to discriminate between two
rebars located respectively at depth 75mm and 175mm and
at the interval of 40 mm.