| 摘要 |
<p>The "optoelectronic dynamometer" chiefly serves the electrical detection of very small forces with the aid of approach flow or acceleration. In this case, it is possible to obtain a plurality of components of the measured quantity simultaneously, so that modulus and direction are detected. The basic principle is based on the elastic bending of an optical fibre clamped at one end. x and y components of the force acting perpendicular to the fibre, and thus also the corresponding bending, can be converted into signals optoelectrically using a reflected radiation principle. In this case, the deflection of the free fibre end, e.g. with respect to other optical fibre ends, leads to variations in the light intensities transmitted and received by photosensors. Possible measured quantities are flow velocity, sound, acceleration (gravity, oscillations), weight and forces or displacements otherwise impressed. Small and cost- effective embodiments are possible, which can supply signals proportional to the measured quantities. Effects of ageing and temperature and other interference effects can be effectively compensated. <IMAGE></p> |
