portable phased array system model : ipas-128tm · ipas-128 provides two real time rf signal for...

AcouLab www.acoulab.com

AcouLab New generation acoustic solution

Portable Phased Array SystemPortable Phased Array System

Model : IPASModel : IPAS--128128TMTM

#151 ~ 152 Chungnam Techno Park

244-19 Songkok-ri Yeomchi-uep Asan-city Chungcheongnam-do, KoreaTel : 82-41-543-8072~3, Fax : 82-41-543-8074



What is the Phased Array System?What is the Phased Array System?

Ultrasonic phased array technology has been used for ultrasonic diagnosis in Medical fields since the early 1970’s. In case of industrial NDT using ultrasonic phased array technology has been used since the early 1990's.

Phased array technology allows the generation of an ultrasonic beam with the possible of setting the beam parameters such as angle, focal distance, and focal point size through software and hardware. A single array probe can be controlled electronically to generate ultrasonic beams of many different angles and to focus at many different points on the inspected component. This capability opens possibilities for achieving improved examination coverage, accuracy and for reducing examination time.

It’s commonly used technique in Medical fields



Principles of Ultrasonic Phased ArrayPrinciples of Ultrasonic Phased Array

AcouLab IPAS-128, portable phased array system is allowed that each piezoelectric element of a probe can be individually controlled electronically. It is possible to generate acoustic beams that can be guided and focused at many angles and depths in the inspected component, called electronic beam steering, electronic focusing and electronic scanning.



- Electronic beam steering and Electronic beam focusing

To generate a beam for beam steering and focusing, various probe elements are pulsed at slightly different times. By precisely controlling the delays between the probe elements, beams of various angles, focal distances, and focal spot size can be produced, it’s called “focal law”. The superposition of the each ultrasonic wave from individual element forms a new wave front. Therefore, ultrasonic beam is steered and focused at desired point without acoustic lens and angled wedges

Electronic beam steering

cd ατ sin

=∆

Time delay of each elements for electronic beam steering



- Electronic beam steering and Electronic beam focusing

Electronic beam focusing

The echo from the desired focal point hits the various transducer elements with a computable time shift. The signals received at each transducer element are time-shifted before being summed up together. The resulting sum is an A-Scan that emphasizes the response from the desired focal point and attenuates various other echoes from other points in the material.

Time delay of each elements for electronic beam focusing

−+

−

+−

+

+=

21

221

2

sin)(2)(1sin21 ssn FdNn

FdNn

FNd

FNd

cFt θθ



- Sectorial and linear scan with dynamic focusing

Ultrasonic phased array system is provided real-time B-scan image from a single inspection point without any physical motion from the transducer. It can be represented as linear and sectorial scan with dynamic focusing.

Linear scan



One phased array probe can focus at many different depths, allowing faster and more reliable inspection of thick components with dynamic focus. When the accessible area is enough to contact the linear array transducer, linear scan can be used to inspect flat surface such as steel plates. When the transducer contact area on the surface of the test specimen is limited, sectorial scan be used to make the large sectorial shape real time B-scan image of the inside of specimen.

Linear scan Dynamic focusing

- Sectorial and linear scan with dynamic focusing



Importance Factors of Phased Array

- The beam directivity, H(θ)

H(θ) =

−

−

)sin(sinsin

)sin(sinsin

sin

)sinsin(

s

s

dN

dN

a

a

θθλπ

θθλ

π

θλπ

θλπ

Where, element width (a)inter-element space (d)number of elements (N)steering angle (θs)wavelength in target material (λ)

N=16 N=32



Importance Factors of Phased Array

- The lobe sharpness factor, q

q = )(sinsin)(sinsin 11

dNdN ssλθλθ −−+ −−



Features of AcouLab IPASFeatures of AcouLab IPAS--128128TMTM

- Most powerful 32 ch. Pulser/receiver module

AcouLab IPAS-128 has 32 ch. pulser/receiver modules that are operated upto 32 elements in phased array probe simultaneously, and weight is only 3Kg with battery.

Probe

Local DSP (8)Local DSP (8)

MasterMasterDSPDSP


Local DSP (8) Local DSP (8)


IPAS-128™ basis 32 Channel Array

MUXMUXAMPAMPADCADC



- Real time A, B, C-scan

IPAS-128 provides two real time RF signal for desired beam angle in B-scan. A-scan display window has 3 gates and FFT function, and B-scan can be represented as linear, sectorial and azimuthal scan with dynamic focusing. The gates in A-scan windows provides C-scan image and 3D that is same data format compatible with “ScanUp” software by AcouLab.



Portable size with Tablet PC (Battery)

USB Port

- Work with any type of PC

IPAS-128 has USB interface that is work with any type of PC like desk top, laptop and tablet PC. It is possible to save the unlimited CINE (video player) data and B-scan images in PC.



- PC interface : USB in PC, Notebook PC, Tablet PC- Operating system : MS Windows 98, 2000, XP- Size (width x length x height ) : 310 x 275 x 66 mm- Weight : 3kg - Number of elements : upto 128 elements- Frequency range : 2 to 15MHz- Digitizer : 8 bits, 40MHz (80MHz optional)- P/R Channel : 32 channels - Pulser Voltage: -100 ~ 100V bipolar spike pulser- Pulser width : 140nsec- Probe : Linear, Steering and azimuthal Scan- Scan mode : Real time A, B, C-Scan- Display : 3 Dimension, compatible with ScanUpTM

- Recording : Unlimited Flames - Focusing : Full digital beam former- PC interface : USB 1.0- Power supply : 100~240V and battery operation

Specification of AcouLab IPASSpecification of AcouLab IPAS--128128TMTM

portable phased array system model : ipas-128tm · ipas-128 provides two real time rf signal for...

Documents