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Ultrasonic
flaw detector UMA (ultrasonic measurement apparatus)"SCANNER"
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Compact
ultrasonic flaw detector "UMA-SCANNER"
is a portable all-purpose instrument for testing
metals, polyethylene, plastics, ceramics.
The device combines a variety of functions with
simplicity of control and small size. Good flaw-detecting
characteristics, a bright electroluminescent display,
standalone power supply, small overall dimensions and low weight make
it convenient and effective. The flaw detector
may work with any piezolectric transducers (PET)
in the operating frequency range. |
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Features
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simplicity of operation, small dimensions and weight
• measures time and coordinate values
"X", "Y"
• measure the article's thickness
• вbuilt-in clock and temperature sensor
• battery charge control and discharge warning system
• sound and optical alarm systems
• memory to store the settings for particular PET and test objects
• PET identifier, which reads the PET parameters
• possibility of "freezing" the image on the flaw detector display
• memorizing the image of pulses and other relevant information
• time corrected gain (TCG)
• indication of the instrument's consumed and remaining memory
• possibility of connecting a printer or an external computer
• possibility of using in semi-automatic and mechanized testing systems
• the methodology is approved by the RF Gosgortekhnadzor
• the instrument is certified |
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Key engineering
specifications |
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Gain
control:
Frequency range:
Scanning range:
Gate displacement:
Display:
Number of memorized settings:
Number of memorized display images
Number of TCG control points
Number of channels
Operating temperature range:
Power supply:
Duration of uninterrupted operation from batteries
Overall dimensions:
Weight:
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85
dB with a resolution of 1 Db
1,0 ... 10 MHz
0 ... 10000 mm (longitudinal waves)
horizontal and vertical
electroluminescent with adjustable brightness
256
1000
8
8
• standard -10 ... +35 °C
• extended -20 ... +50 °C
from batteries or power mains 220 V.
up to 8 hours
200 x 225 x 90 mm.
3,5 kg (batteries included)
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"Freezing" images and recording them into
the storage unit (up to 1000 images with additional relevant information)
• measures coordinate values "X","Y", thickness. |
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TCG.
• Number of TCG control points: up to 8. |
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Temperature indication
• Battery charge indication
• Volume of consumed and remaining memory
• Time and date |
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Operation
in the general-purpose flaw detection mode. |
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Manual
UT testing in the general-purpose flaw detection
mode with standard or special-purpose PET is
performed subject to general requirements, and
according to methods stipulated by the current
normative and technical documents, or other methods
approved by the RF Gosgortekhnadzor, the RF
Gosatomnadzor and other supervisory authorities.
For operation in the general-purpose flaw
detection mode, connect the piezolelectric
transducer through a connecting cable to the
flaw detector terminals on the front panel.
The associated PET is connected to any terminal
(oscillator or amplifier), semi-associated - to both
of the terminals. For a PET witout an integrated
matching circuit (generally, for PETs made in
the CIS member-states), apply a matching filter
to the operating frequency by connecting it to
the flaw detector.
Testing parameters are selected and adjusted
through a keypad and a parameter control handle.
Once the flaw detector is switched on, the main
menu is displayed, which lets an operator work
with the instrument in the dialog mode.
To enter the general-purpose flaw detection mode,
press button "1". The instrument will switch
to the manual mode, with the A type scanning displayed.
It is possible to retrieve a preset mode from the flaw
detector's memory. The instrument can memorise up to 256 settings.
The instrument's front panel features a built-in PET indentifier,
which allows automatic readout of PET parameters (for the PETs
produced by the "ALTES" company) - input angle,
time of pulse delay in the prism, number, etc., and enter
them into the instrument's storage under a pre-determined
setting number.
Switching between the operating modes (associated or separated)
is achieved by means of button "0".
On the front panel of the instrument, to the
right of the flaw detector display, there is
a column of designations, with numerical
values of the relevant parameters displayed
on screen. |
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Model
printout of a manual control echogram |
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Memorizing
and printout if the flaw detector screen image |
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The flaw detector features a function of "freezing"
an echogram at the moment of flaw detection
with subsequent entering of the "frozen"
screen image into the flaw detector's storage unit.
A memorized echogram may be printed. Here, printed
is the echogram itself, as well as settings and
coordinates of the flaw location.
The flaw detector's allows
memorizing up to 1000 screen images with additional relevant information.
To make a print, connect the printer to the flaw detector,
select the required echogram from the list kept in the
storage unit and press the relevant key on the keypad.
After that, the printer would print a report with the stored echogram and testing parameters.
The operator is to supplement the printout by hand with required information
and put his signature. |
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Other
functions |
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The flaw detector provides for a possibility of leveling the depth gain.
To this effect, enable the TCG mode. The gain may be levelled for
eight points.
The instrument may be used as a manual thickness meter. To this effect, one has to connect a P112 (P111) PET.
Thickness is measured up to the accuracy of 0.1 mm.
The flaw detector has eight channels. It may be used in automated and
mechanized plants for flaw detection and thickness metering of various articles. |
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Ultrasonic measurement
apparatus of the "Scanner" series - model "SCARUCH"
(derived from Russian words SCAnner RUCHnoy - Portable Scanner)
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Purpose
and overview: |
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Compact
ultrasonic measuring apparatus "Scanner" –
the "SCARUCH" model (UMA "SCARUCH") is designed
for prompt detection and determination of characteristics
of flaws in welded joints and the base metal of pipelines,
vessels and metal structures with the wall thickness at 4 ...60 mm,
and for thickness metering of articles up to 100mm thick.
The apparatus is used for manual and mechanized ultrasonic
quality testing of welded joints and the base metal, with
the longitudinal scanning rate being 0.5 ...1.0 m/min along
the welded seam or a section of the base metal.
UMA "SCARUCH" operates in the mode of automated
registration and decoding of testing results
(AR & DTR), with manual scanning performed by a
system of transducers, as well as in the manual
general-purpose flaw detection (thickness meter)
mode. Testing may be performed both in workshop and
assembling conditions.
The instrument has passed state testing and has positive
references from enterprises of various industries.
UMA "SCARUCH" is certified by the RF Gosstandart, registered
in the State Register of Measuring Devices (No.15723 96)
and approved for application in the Russian Federation.
The methods of application of UMA "SCARUCH" are
approved by the RF GOSGORTEKHNADZOR
and permitted for application on facilities under its supervision. |
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Functional
features:
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implements 16 various scanning schemes on each millimeter of tested material
• detects internal flaws (voids, slag shots, lacks of fusion,cracks, etc.)
• identifies flaws according to their nature (volume, volume-plane, plane)
• assesses parameters of flaws (length and penetration depth)
• performs thickness mesurements of the base metal along the
surface being scanned, with the section width of 65 mm
• automatically tracks the level of acoustic contact with the article
• automatically determines and adjusts UT parameters, with a roughness correction
taken into account
• performs self-diagnostics of electronic and acoustic systems
• automatically registers, memorizes and decodes flaw detection results
• transfers the testing results to the storage device of the computer it is connected to
• prints out testing results by means of the printer it is connected to
• features standalone power supply |
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Key
engineering specifications |
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registration resolution: |
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of travel sensor 1 mm
of flaw parameters 1 mm
of thickess 0.1 mm
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inaccuracy of measurements of the welding joint flaw parameters: |
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by length ±1 mm
by penetration depth ±0,5 mm
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inaccuracy of determination of the flaw coordinates along the seam |
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of the value of scanned distance; within 1 %
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minimum size of detectable flaw 0.8 ...1.0 mm
• UT rate up to 1 m/min
• number of channels 8
• number of scanning schemes 16
• frequency range, MHz 1.0 ...10.0
• maximum gain for each channel, dB 90
• gain adjustment range, dB 85
• maximum scanning depth (longitudinal waves), mm 10000
• duration of continuous operation from storage batteries (6 x 1.2V ), h 8
• operating temperature range: |
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standard,°С 10 ...+35
extended,°С 20 ...+50
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time of operating mode settlement, min 1
• flaw detector overall dimensions 200 х 225 х 90 mm
• flaw detector weight (with storage batteries) 3.5 kg |
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Scope
of "SCARUCH" apparatus: |
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UMA
"SCARUCH"comprises the following units:
•compact 8-channel flaw detector UMA "SCANNER"
•multicomponent acoustic unit (AU)
•mechanical device (MD) with a sensor for measuring the scanned distance
•data cable (DC) |
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The flaw
detector is designed for formation of electric signals and PET
actuation in acoustic units, receiving and processing of signals
coming from acoustic units subject to a determined algorithm,
issuing information on availability of flaws, their coordinates,
type and size.
The acoustic units is intended for
generation of ultrasonic vibrations and subsequent
reception of reflected vibrations. The acoustic unit
comprises 8 ...14 transducers (4 ...7 on each side of the seam).
Transducers have different input angles
and scan the entire section of the welding joint
simultaneously from two sides of the seam through
various schemes: associated,"tandem","duo"etc. On
each millimiter of scanned distance, amplitudes are
registered for all the preset UT schemes, which are
processed in the flaw detector subject to a predetermined algorithm.
The acoustic unit features a wear-resistant
layer to protect the working surface from abrasion.
The versatile mechanical device serves
to accomodation and connection of acoustic units, ensuring
pressing an acoustic unit against the article. On the
mechanical device, there is a sensor of scanned distance
(travel sensors), as well as indicators of disruiption
of acoustic contact and availability of a flaw. The
travel sensor allows measuring the length of the tested
section and the length of detected flaws.
The data cable is intended
for data communication between the acoustic
unit and the flaw detector. The data cable
is connected to the flaw detector's rear panel. |
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Operation
in the general-purpose flaw detection mode. |
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Manual
UT testing in the general-purpose flaw detection mode
with standard or special-purpose PET is performed
subject to general requirements, and according to
methods stipulated by the current normative and
technical documents, or other methods approved by
the RF Gosgortekhnadzor, the RF Gosatomnadzor and
other supervisory authorities.
For operation in the general-purpose
flaw detection mode, connect the piezolelectric transducer
through a connecting cable to the flaw detector terminals
on the front panel. The associated PET is connected to any
terminal (oscillator or amplifier), semi-associated - to both
of the terminals. For a PET witout an integrated matching
circuit (generally, for PETs made in the CIS member-states),
apply a matching filter to the operating frequency through
connecting it to the flaw detector.
Testing parameters are selected and
adjusted through a keypad and a parameter control handle.
Once the flaw detector is switched on,
the main menu is displayed, which lets an operator work
with the instrument in the dialog mode.
To enter the general-purpose flaw
detection mode, press button "1". The instrument
will switch to the manual mode, with the A type
scanning displayed. It is possible to retrieve
a preset mode from the flaw detector's memory.
The instrument can memorise up to 256 settings.
The instrument's front panel
features a built-in PET indentifier, which
allows automatic readout of PET parameters
(for the PETs produced by the "ALTES" company)
- input angle, time of pulse delay in the prism,
number, etc., and enter them into the instrument's
storage unit under a pre-determined setting number.
Switching between the operating modes
(matched or separated) is achieved by means of button "0".
On the front panel of the instrument, to the right of
the flaw detector display, there is a column of designations,
with numerical values of the relevant parameters displayed on screen. |
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Operation
of the apparatus in the automatic mode: |
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The apparatus operates in the 16-stroke mode. Every stroke implements a preset testing scheme. Each stroke has the following parameters preset and kept in the instrument's memory: sensitivity (gain) level (subject to requirements of the current regulatory documents); the gate location and duration (subject to the thickness tested and the distance to the seam); amplitude thresholds for registration of a flaw and determination of its dimensions by section. On each millimiter of the scanned distance, amplitudes are registered in all the 16 strokes, which are thereupon processed in the flaw detector. On each millimeter, scanning is performed of the entire section of the metal under test, simultaneously from two sides of the seam (for butt and overlapping joints with an access from two sides), and with the operator moving the mechanical device with an acoustic unit - of the entire section under test (both the welded joint and the base metal). The time-controlled gating system and processing pf each of the signals received from the PETs with a microprocessor make it possible to identify the type of defect (volume, plane, volume-plane)
The flaw parameters are determined through comparing all the signals received from it and determination of the cycle's strokes of the maximum amplitudes (for the echo-method) and minimum amplitudes (for the reflecting-shadowing method) on each millimiter of the scanned distance.
Thickness metering involves measuring the values of thickness by each of four PETs of an acoustic unit. Thickness metering is performed through scanning the section being tested with an acoustic unit.
The results of testing are displayed on the screen of the flaw detector and may also be printed (with a printer connected to the flaw detector). Following the testing results, the quality of the entire weldig joint is assessed subject to the regulatory documents, or according to the "Method of application of UMA of the "SCANNER" series for UT of welded joints and the base metal of pipelines, vessels, metal structures SCAN 2.00.00.000.М" approved by the RF Gosgortekhnadzor. |
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The procedure
of UT in the automatic mode |
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The process
of testing welded seams or the base metal in the mode of automatic
registration and decoding of testing results comprises the following
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•typing
through the keypad of the number of joint to be tested, the
number of acoustic unit, the article's parameters: diameter
(for cylindrical surfaces) and thickness; |
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•manual scanning performed by the operator with a mechanical device along the surface of the object under test at a travel rate of at most 1 m/min. Testing may involve stops and gradual variation of rate within 1 m/min, as well as adjustment of location of the mechanical device relative to the axis of the welded joint.
The instrument's storage unit allows memorizing the results of UT over 500 meters of flawed seams. |
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•viewing
the UT results displayed on the screen of the flaw detector
•assessment of detected flaws for compliance with the standards
•if necessary, specification of the flaw parameters with manual
PETs (to this effect, the instrument is to be switched to the
general-purpose flaw detection mode)
•printout of a report with the testing results
•execution of a conclusion on the qulaity of the welded joint
•submission of the testing results to the head of the compliance assessment department |
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Ultrasonic
multi-channel flaw detector AUMA (automated ultrasonic measurement apparatus)"SCANNER"
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Ultrasonic
multi-channel
flaw detector
"AUMA-SCANNER"-
options: 8; 16; 32 channels.
Intended
for automated high-speed (up to 3 m/s)
testing - flaw detection, thickness measurements,
structuroscopy - in the process of manufacture of various articles: pipes, rollers, sheets;
bodies of revolution: disks, rings, shafts, pistons, etc.
billets of metal structures: profiles and other articles. |
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Engineering
specifications |
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Oscillator
of shock pulses
• pulse voltage - 200 V
• pulse duration -100 ns
• output resistance 1 Ohm
Gate generation unit
• resolution of gate formation - 50 ns
• gate duration -100 ns...800 mks Timing unit
• timing resolution - 50 ns
• measured time -100 ns...1 ms
Time-cotrolled gain unit
• gain control range - 60 Db
• gain control period - 2 mks...800 mks
Amplifier
• gain - 90 Db
• gain control range - 75 Db
• bandwidth by level 0.7 -1.5...10 MHz |
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Analog-to-digital
converter (ADC)
• ADC digit capacity -10
• inaccuracy ± 1 digit
• sampling rate - 50 MHz
Microcontroller
• digit capacity -16
• clock frequency - 20MHz
• flash - memory - 256 kB + 64 MB
Display - Electroluminescent, size: 117 x 88 mm
Keypad - membrane type, water-proof, 12 keys
Overall dimensions - 215 x 600 x 210 mm
Power supply voltage - 220 V
The flaw detector may be connected to
• an external PC
• flash cards
• distance sensors
• travel angle indicator
• flaw marker |
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