SAA (ShapeAccelArray)

SAA is a rope-like array of sensors and microprocessors that fits into a small (27 mm; 1.05" ID) casing. Any deformation that moves the casing is accurately measured as a change in shape of the SAA.

Vibrations may also be measured, at multiple points. Most SAAs are shipped on a reel, can be handled by one person, and can be 100 m (330') long.

SAA is re-useable. The same array can be used for horizontal or vertical measurements.

In brief:

• Length of segments: 30 or 50 cm (12” or ~19”)
• Each segment has three MEMS accelerometers
• Segments are connected by flexible joints
• In-array microprocessors collect and send digital data
• Two forms: “Field” and “High-speed Research” (SAAF and SAAR)
• Measurements are based on tilt, like inclinometer measurements

... But

• Arrives on a reel
• Installs in inexpensive, locally available, 27 mm (1.05”) ID PVC electrical conduit.
• Withstands huge deformations
• Unlikely to be trapped in casing
• Measures deformation at typically hundreds of locations
• The same array can be used vertically or horizontally (slope or subsidence)

About Measurand:

Products: 3D sensing arrays since 1993. Markets: human

motion capture and geotechnical applications. Located:

Eastern Canada. See also www.Measurand.com.