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NEW!
Version 4.2 NTR AIMS Scanning System Software
NTR AIMS 4.2 Software Features Table [PDF][220kB]
NTR Systems Inc.
Acoustic Intensity Measurement System (AIMS)
AIMS is a precision scanning system mounted on a tank that allows measuring and
mapping of acoustic fields in liquids. It is the heart of any ultrasound
measurement system, suitable for medical imaging, pulsed and CW Doppler,
theraputic devices and industrial ultrasound between 0.25 and 60 MHz(*).
(*) Note: System may be applicable for some measurements outside this
range - consult Onda about your application.
Tank Sizes:
- ASTS01:Inside dim: 0.73m X 0.36m X 0.44m
(29" x 14" x 17" tall)
- ASTS03:iInsideDim: 0.89m X 0.51m X 0.58m
(35" x 20" x 23" tall)
Data Sheet [PDF][358kB]
Applications
Engineering/Product Development:
Evaluate prototype transducers and excitation systems from measurements such as
- Beam Dimensions
- Focal Zone Location and Size
- Pulse Amplitude, Spectrum, Center Frequency and Bandwidth
- Pitch-Catch or Pulse Echo Measurement Modes
Government Compliance Testing:
Gather data needed for diagnostic device compliance submittals.
Measure, calculate and plot
- Pulse waveform and pulse intensity integral plots
- Intensity: pulse average(Isppa), temporal peak(Isptp),
temporal average(Ispta), pulse duration
- Mechanical Index
- In-water and derated intensity values
- Pressure: positive and negative peak values
- Acoustic power by planar integration
- Beam dimensions (1 and 2 dimensions)
- Center frequency and bandwidth
Therapeutic devices: Compute
- Effective Radiated Area (ERA)
- Beam Non-Uniformity Ratio (BNR)
Production Testing
With data acquisition typically at 2 points per second, production line
measurements are one common application for this system. Built-in scripting
allows automation of repetitive measurement tasks, pass/fail checks, and
message-based control of programs written by the user.
AIMS Capabilities
- Precise 3-axis scan, repeatable within 12µm and absolute accuracy of
25µm over 30 cm.
- Travel: 610mm x 360mm x 380mm vertical (AST01);
800mm x 510mm x 510mm vertical (AST03).
- Digitized and stored waveforms, 1- and 2-dimensional spatial scans.
The software gathers, displays and stores the data.
- Automatic computation of most relevant acoustic parameters (see above).
- Computer-controlled adjustment of either the hydrophone or the
transmitting transducer for beam alignment using the optional two axes
Angular Positioner.
- Frequency scans, where the response is measured as a signal generator
is stepped in frequency, is done with minimal additional hardware. This
is valuable in transducer evaluation and hydrophone calibrations.
- All measurement and reporting features can be verified by using standard
data files (provided) and then comparing the resulting outputs with the
expected results. While not required as the executable software
has been thoroughly validated at the factory, verification is helpful because:
- It builds confidence by showing the operator typical, expected results.
- It verifies system functionality for users who wish to modify the source code.
The AIMS basic package
Options
- Angular positioner (includes upgrade from 3 to 6-axes controller and cable)
- On-site installation and training (available in most locations)
- Water conditioning system for degassing, filtering and temperature control
Other required components
System Controller
- A PC compatible computer running Windows 2000 Pro or XP is needed, with
one empty PCI slots.
- Onda offers a PC with all software and hardware installed.
Waveform Digitizer
- A digitizing oscilloscope is a necessary component. Many models are
compatible with the AIMS software.
- Onda offers the Agilent DSO6012A Oscilloscope.
Hydrophone
- Onda offers a complete line of hydrophones for acoustic measurements.
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