Abstract: The extended contact strip has a first elongate strip having first and second longitudinal edges, an upper and a lower surface, a first electrically conductive strip located on the upper surface of the first elongate strip, a second elongate strip having first and second longitudinal edges, and a flexible resilient portion extending between the first and second edges, the flexible resilient portion having an upper and a lower surface, a second electrically conductive strip located on the lower surface of the second strip, the first and second strips being connectable at their respective first and second edges, and the first and second strips forming an isolating gap such that the first and second electrical conductors lie opposite and spaced apart from each other when the second strip remains un-deformed, such that the first and second electrical conductors can make contact with each other upon deformation of the second strip.

Abstract: An extended contact strip comprises: a first elongate strip having first and second longitudinal edges, an upper surface and a lower surface; a first electrically conductive strip located on said upper surface of said first elongate strip; a second elongate strip having first and second longitudinal edges, and a flexible resilient portion extending between the first and second edges, said flexible resilient portion having an upper surface and a lower surface; a second electrically conductive strip located on said lower surface of said second strip; said first and second strips being connectable at their respective first and second edges; said first and second strips forming an isolating gap such that said first and second electrical conductors lie opposite and spaced apart from each other when said second strip remains un-deformed, and such that said first and second electrical conductors can make contact with each other upon deformation of said second strip.

Abstract: Methods and apparatus for introducing a plurality of optical markers to a field of view, capturing a two-dimensional image of said field of view on an image plate comprising a pixel array, determining a set of marker origin offset values and using said offset values to establish a set of orientation values describing the relationship between the field of view and the image plate are disclosed. These orientation values are used to relate the area of image captured by each pixel in the image plate to the real world. By applying projective geometry, vector analysis and trigonometrical surveys an image analysis is conducted to establish a three-dimensional positional data set describing the three-dimensional position of regions of reflectivity in the captured two-dimensional image. From this data set a three-dimensional model of the field of view can be reconstructed.