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Measurement of dimensional variations of crack
To
appreciate the change in pathological phenomena
of mechanical nature concerning an entire construction
or building, crack deformation must be measured.
The
ball deformeter, a measurement instrument perfected
by the CEBTP can be used to follow preciselythe
positive and negative dimensional variations with
time, inmaterials such as concrete, rock, masonry
and metal structures, within a range of 1.5 mm on
a measurement base of 200 mm.
MEASUREMENT
PRINCIPLE :
The measurement principle consists of comparing
the length of the measurement base with that
of the invariable standard bar.
The measurement base is formed with two 6 mm
balls glued onto the surface to be controlled,
200 mm apart, and positioned with a rode.
Readings are taken on the comparator, the instrument
placed in turn on the standard bar and on the measurement base.
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COMPARATOR
CHARACTERISTICS :
-
6 digit LCD display,
-
Reading : 0.001 mm (value of one digit : 0.001
mm), ,
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Accuracy : 0.003 mm,
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Reset with the sensor in any position,
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INC (incremental) or ABS (absolute) measurement,
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Dial turns through 360° for easy reading,
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Reversal of measurement direction (+ or -),
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Pre-selection function,
-
Data output for communication with microcomputers
via RS 232 C interface.
Powered by two SR44 batteries.
THE
WHOLE ELECTRONIC BALL DEFORMETER INCLUDING :
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-
1 Electronic ball deformeter 200mm base
DB-CE.
- 4 positioning rod 200mm for the balls
- 1 Invar standard bar 200mm
- 50 x 6mm balls crimped onto brass eyelets.
- 1 carrying case.
- 1 usuer's manual. |
<Other
CEBTP materials>
You
can obtain a complete set of documents about these new
equipments
quickly by simply placing a request at :
M.
Ludovic DENIS ou M. Frédéric BOURDET
By
Email :
l.denis@cebtp.fr
/ f.bourdet@cebtp.fr
By
Télécopie : +33 1 30 85 23
79 |
By
courrier :
CEBTP
Service matériels
Domaine de St Paul - BP 37
78470 Saint Rémy-lès-Chevreuse
France |
The texts in the present document only have an information purpose,
and neither their author nor CEBTP are committed by them.
The texts, schemes and photographs represented in the present
pages are an exclusive property of CEBTP and they cannot be
reproduced under any form without a previous written authorization
of CEBTP
Copyright © 2001, CEBTP All rights reserved.
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