Multi-stress sensor

Alfaro JE (2007) A multi axial bioimplantable MEMS array bone stress sensor. PhD thesis Carnegie Mellon University. http //www.ri.cmu.edu/publication view.html pub id=5975... 

Fig. 2.9. Schematic of the setup of multi-beam optical stress sensor.

A limitation of the serial and parallel laser scanning methods and multi-beam optical stress sensor is that they employ monochromatic beams, which would lead to difficulties in measuring the curvature of transparent films with thicknesses of one-fourth the wavelength. These optical methods also require reflective surfaces for curvature determination. 

Since substrate curvature can be accurately measured, even in the presence of rigid body motion or vibration, by use of the multi-beam optical stress sensor or the coherent gradient sensor techniques de-... 

Stress measurement 20 channels, multi-channel data acquisition card of high speed, piezoresistive and piezoelectric sensors. 

During the cable erection and cable-stayed buckle construction process of main arch ring, through the multi-point extensometer, steel bar stress test instrument, cable force sensors and other monitoring instrument, obtained more accurate monitoring data, provides the construction security guarantees. 

Alfaro JE, Weiss E, Campbell P et al (2009) Design of a multi-axis implantable MEMS sensor for intraosseous bone stress monitoring. J Micromech Micromeng 19 085016. http // iopscience.iop.org/0960-1317/19/8/085016... 

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