JIK intelligent industry
ULTRASONIC SCIENCES LTD
ULTRASONIC SQUIRTER C SCANNING SYSTEM FOR
SANAT HOUSHMAND JIK
1. Basis of Quotation
A C scan “flat bed” squirter system for inspection of composite tubes using the through
transmission technique and Pulse-Echo. The system is designed for scanning up to 15
panels approximately 1000 mms long x 250 to 500mms Diameter. This system is
dedicated to the scanning of these parts, although it can also be used for any other
products which will fit within the scan area.
The ultrasonic system proposed is based on the latest technology Pulser Receiver, which
has both logarithmic and linear receivers. This system is used for composite inspection by
many companies in UK and elsewhere, including BAE SYSTEMS, Stork Fokker, Airbus
and suppliers to these companies. With this system it is possible to inspect panels in a
single pass using two channels for displaying the data.
2. Mechanical scanning system
Support framework fabricated from square section steel tube.
Stainless tank in base of system with water circulation pump and drain.
X-Y scanning system using precision linear bearings with recirculating ball slides.
Stepper motor driven via precision belt drive – the long axis has belts on both sides
driven by a single motor.
Manually adjusted squirter manipulators for initial aligment of squirters.
Z axis adjustment 200mm manual
Axis resolution 0.1mm or better
Axis repeatability 0.2mm or better
Scanning speed Approx 750mm/second maximum
Two squirter nozzles are included with 6mm diameter orifice. Other orifice diameters are
available and can be changed easily. The nozzles are designed for standard 1” diameter
probes.
By S.SOBH SHENASAEE
JIK intelligent industry
3. Motion control system
Two axis stepper motor drive system with filter system to eliminate the possibility of
noise pickup.
Computer control of axes.
4. Computer system
Industrial computer – 19" rack mount – with Pentium processor – 3GHz+
160 Gbyte (minimum) HDU
Rewriteable CD/DVD drive
USB, parallel, network ports
Windows 2000 Professional
Expansion slots for USL ultrasonic and data acquisition boards
21/22" LCD flat screen monitor
5. Ultrasonic system
PC based ultrasonic and data acquisition system housed in computer expansion slots and
remote Pulser Preamplifier mounted on Z axis.
PR30 Pulser Receiver
Programmable square wave pulser
Pulse voltage 0 – 400V
Pulse rise time <4 nanosecs
Pulse width 10 – 250 nanosecs
PRF 20kHz
Linear and logarithmic amplifiers
Preamp gain 0,10,20,30dB
Main gain (linear) 0 – 100dB
Main gain (log) 0 – 20dB
Frequency range 0.2 – 30MHz (-3dB)
Dynamic range 90dB in log mode (instantaneous)
Filters- Tunable band pass filters in 10 ranges with 64 settings in
each range.
Pre and post rectification filters
Wideband setting
DAC – 60dB range – 1024 points
Main bang and interface triggered with variable thresholds
By S.SOBH SHENASAEE
JIK intelligent industry
6. Software
Windows 2000 software package for full system control.
Main screen displays digital A scan with 30Hz minimum update rate – data acquisition is
not limited by the screen update but occurs at the full PRF rate. Axis positions shown in
real time.
Selectable menus for Ultrasonics, Scan settings, View options etc.
Storage and recall of scan and ultrasonic setups.
Scan size and resolution variable in 0.1mm steps.
Scan area can be square, trapezoidal or other selected by mouse.
Full waveform storage when required (Volume Scan), with waveform processing
functions.
Real time C scan imaging, amplitude and time of flight.
Zoom, Pan and scroll of C scan images.
Probe move to point on C scan, selected by mouse.
Sequential, automated scans on individual panels if required.
Probe characterisation function.
Multiple image display, each with operator selected display palettes.
Text entry on images.
User edited Report formats for printing.
Image processing – on screen measurements, auto-defect analysis according to operator
programmed criteria, histogram functions, FFT frequency analysis and probe
characterisation functions, palette selection and editing.
Typical screen displays are shown in Figs 3.
7. Miscellaneous
5 MHz focussed transducers
Installation, commissioning and training is included (3 days total).
Operation and maintenance manuals.
One year warranty (except transducers which are covered by the manufacturers
warranty).
By S.SOBH SHENASAEE
JIK
intelligent industry
Fig 1
Flat bed squirter C scan
system for composites.
(AIM Composites,
Cambridge). This is only to
show the level of design
sophistication and not the
actual proposed system.
By S.SOBH SHENASAEE
JIK
intelligent industry
Figs 2 a,b,c C scans on test panels (reflector plate and TT)
By S.SOBH SHENASAEE
JIK
intelligent industry
Figs 2 d,e,f Pulse echo scans on composite panels – top two images are
amplitude C scans, lower image is time of flight (thickness) c scan
By S.SOBH SHENASAEE
JIK
intelligent industry
TYPICAL SCREEN DISPLAY
Fig 3 Ultrasonic setup menu
By S.SOBH SHENASAEE
