BATuses_frame

The many possible uses for BAT^® transducers can be broken into two general categories ...

1. in-air & reflection applications - in this category, ultrasound does not cross any gas/solid or gas/liquid interfaces. Instead, simple propagation through the gas (left figure below) or reflections from solid or liquid surfaces (right figure below) are of interest.

Schematic diagram showing "in-air" applications for BAT transducers in which simple propagation through a gas is of interest.

Schematic diagram showing reflection applications for BAT transducers in which reflections and interactions from solid and liquid surfaces is of interest.

examples of use:

measurement of gas properties (e.g., temperature, pressure, flow-velocity)
imaging of temperature and flow-fields in gases
characterization of suspended particulates in gases
other environmental & gas-analysis sensors

object detection and ranging
object motion detection
level-detection of liquid-surfaces
robotic imaging and room surveillance
imaging & gauging of parts for quality and process control in manufacturing industries
surface roughness measurements

2. non-contact NDT applications - in this category of application, ultrasound is generated and received in solid or liquid materials through an intervening air- or gas-layer (as shown in figure below-right). This has three significant advantages over conventional ultrasonic Non-Destructive Testing (NDT) methods. First, it allows the internal portion of solid & liquid materials to be inspected without contact. Second, it eliminates the need for liquid couplants in situations where they are either damaging to materials or impractical to maintain on large structures. And finally, it provides the potential for rapid scanning due to the elimination of the liquid couplant.

examples of use:

non-contact imaging of defects in materials (e.g., to detect delaminations or inclusions)
non-contact monitoring of thickness variations
non-contact measurements of the elastic constants of materials
non-contact materials characterization
quality and process control in manufacturing industries

Schematic diagram showing non-contact Non-Destructive Testing applications for BAT transducers in which ultrasound is coupled into solid and liquid materials through air- or gas- layers.

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