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Ultrasonic Testing Box
OPBOX- USB 2.0 |
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Ultrasonic box with
integrated pulser and receiver rev. 3
OPBOX - USB 2.0 is a
complete ultrasonic testing device, suitable for all ultrasonic
measurements, and due to many additional inputs and outputs, it can be
used as a controller for more complicated devices.
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The box can work together with following devices:
- 2 - 32 channel multiplexer - the
OPBOX can control it directly
- Scanner - it has input for
incremental encoders;
The box contains one channel pulser
& receiver and can be used with one transducer or with two (one is
sending and the second receiving) for pulse-echo and through
transmission measurements.
Size: 164mm x 138mm x 34 mm
Power Supply: 9V DC / 2A
Weight: 590g
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Technical data |
| A/D
converter: |
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Resolution: |
8 bits (internal
10 bits) |
| - Sampling
frequency: |
12.5, 25, 50 or
100MHz 1 |
| Delay
time: |
Post
trigger 255 us |
| Data
buffer: |
up to
128kB 1 |
| Analog
parameters: |
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Input amplifier gain: |
from
-28dB to 68dB |
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Input preamplifier |
0dB
or +24dB |
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Sensitivity: |
+/-
0.275V or 2Vpp |
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Bandwidth: |
0.5
MHz - 25 MHz (-3dB) |
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Input impedance |
50Ohm,
10pF |
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Filters switchable: |
0.5 -
6MHz1, 0.5 - 10MHz1, 0.5 - 15MHz1, 0.5 -
25MHz1, 1 - 6MHz1, 1 - 10MHz1, 1 - 15MHz1,
1 - 25MHz1, 2 - 6MHz1, 2 - 10MHz1, 2 -
15MHz1, 2 - 25MHz1, 4 - 6MHz1, 4 - 10MHz1,
4 - 15MHz1, 4 - 25MHz1
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| DAC (TGC) with arbitrary
waveform generator |
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Resolution of time step |
10ns |
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Resolution |
8bit |
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Max. Gain changing |
48dB
pro step |
| Counters.Input
for incremental encoder: |
2
channels 8bit |
| Trigger |
| - Internal
trigger rate |
software |
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External trigger rate |
TTL
Signal |
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Multiplexer |
TTL |
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Trigger output signal |
TTL
Signal |
| Additional
inputs: |
| - 2
digital lines |
for
external trigger feature |
| - 2
digital lines |
TTL
Signal |
| Output: |
| - 6
digital lines |
TTL
Signal (Multiplexer control up to 64 channels) |
| DATA
BUS |
USB
2.0 (48MHz bulk transfer) |
| Pulser |
| - Pulse
Voltage |
off -
360V (positive pulse, Short circuit step pulser)in 13 levels |
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Pulse lenght (loading time) |
from
0 - 3.1us with resolution 0.1us |
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Fall Time |
<=20ns |
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Pulse duration |
Short
circuit, bandwidth up to about 50MHz |
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Output impedance |
<
1Ohm |
| Characteristic
of the pulser on board: |
Pulser circuit
waveforms: The rising edge of the Trigger signal (described as Trigger)
initiates the transducer charging process. After this time (form 0.1 to
3.1us) a transistor switch which discharges the transducer is turned on
(discharge time is about 20ns, but it can be longer, if the capacitance
of the transducer is too large; the limit is reached, if the transducer
is made from the standard ceramics, is 0.1 mm thick and has 8 mm
diameter).
Because of the very low output impedance of the device (<1 Ohm) and
short discharge time the pulse generated with this device could be
concerned as a real pulse answer for the most transducers. Transducers
with a parallel matching inductance should not be used, since they do
not allow the transducer to be pre-charged (the inductance causes a
short-circuit).
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| Software
Package |
The OPBOX - USB 2.0
software (for Windows 95,98/NT 4.0/2000/XP/Vista) includes all necessary
functions for ultrasonic measurements.
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Technical description of the OPBOX device
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