A Three-Dimensional Strain Rosette Sensor Based on Graphene Composite with Piezoresistive Effect

Table 3

The directional cosines of the six sensing elements.

Sensing element
E1	90	0	1	0	0
E2	90	90	0	1	0
E3	0	0	0	0	1
E4	90	45	0.707	0.707	0
E5	45	90	0	0.707	0.707
E6	45	0	0.707	0	0.707