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BAT-1 unfocussed 10mm Ř circular BAT®
Description:
The BAT-1 is the original BAT® transducer which overcame the past limitations in gas-coupled ultrasound and opened up a wide range of new applications. It is an unfocussed design with a 10mm Ř planar aperture. Its well-damped transient response eliminates transducer “ringing”, provides dead-times as short as 5µsec, and allows measurements at <2mm distance from the aperture. The BAT-1 is so highly sensitive in gases that it can inspect a host of solid materials through an intervening air-layer i.e., without contact. As a result of its broad bandwidth, the BAT-1 source accurately generates any wave shape in a gas (e.g., pulses, tonebursts, chirps) whereas the receiver provides an output voltage proportional to any pressure wave arriving at the transducer aperture. The BAT-1 is the most popular of MicroAcoustic's BAT® species and it is usually the best choice for initial explorations of any new gas-coupled application.
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- type: unfocussed planar transducer with circular aperture
- aperture area: 10mm Ř
- ultrasonic bandwidth in air: 40kHz-2.25MHz (receiver), 40kHz-1.7MHz (source)
- housing dimensions: cylindrical, 34mm Ř x L 26mm
- electrical connector: gold SMB on rear of housing
- mounting: axial or transverse mounting via two 1/4"-20 threaded housing mounts
- transducer cap: adjustable iris diaphragm
Typical beam profile:
axial direction =>
This beam profile
of a BAT-1 source was obtained experimentally under
pulsed excitation, and follows closely the predictions of plane-piston
theory. The ultrasonic beam emerges from the transducer at
left, focuses somewhat within the near-field ( below ~30mm), and then
exhibits the expected behaviour throughout the far-field (or Fraunhofer)
zone. [Note: this field image was obtained using MicroAcoustic's
proprietary miniaturized scanning
receivers.]
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