| 摘要 |
An inclinometer includes a resilient optic fibre (9) which is firmly held at the top (10) in a holder (8). The held end (10) of the fibre is arranged to co-act with an LED light source (7) and its free end lies close to the surface of a quadrant detector (12) and shines a point of light onto the surface of the detector. The coordinates of the light point and hence the inclination are determined from the outputs of the detector quadrants. Vibrations may also be measured. An additional LED (22) and a lens 25 may shine a second point of light onto the underside of the detector (12) to measure the degree of bending of a bore into which the device is inserted. The LED's (7) and (22) are illuminated alternately to distinguish the measurements. <IMAGE> |
