Measuring system for determining the surface line of a body

A measuring system for acquiring shape and length of a surface line (21) of a body (22) in space, comprising:

• a freely movable measuring instrument (1) with a length measuring device (2) for measuring the length of a displacement path of the measuring instrument (1) along the surface line (21) and a further measuring device (3) for determining angular changes of a measuring axis (4) of the measuring instrument (1) with respect to a selected reference axis (5);
• a data transmission device for transmitting data to a computer (6);
• a computer (6) for processing path and angle measurement values of the measuring devices (2, 3) and for generating a representation of the surface line (21);
• the length measuring device (2) for the displacement path comprising a measuring wheel (15) and guide means (16) which are spaced from each other and form two contact points with the surface (21), the contact points being on the measuring axis;
• the further measuring device (3) for determining angular changes comprising two acceleration sensors (7, 9) with one measuring axis (8, 10) each, the measuring axes (8, 10) of the two acceleration sensors (7, 9) being in a common plane and the two measuring axes (8, 10) being at right angles to one another in the common plane and the measuring axis (4) of the length measuring device (2) for the displacement also being in the common plane.