| 摘要 |
<p>A measurement coil (11) is incorporated in a voltage divider circuit (14) or bridge circuit. It is wound on a carrier (28) which is a good electric insulator and is moved in relation to a measurement core (26). The carrier (28) is fixed in a stationary position on the inner wall (29) of a measurement tube (27). The inner wall (29), which is a good electrical conductor, has at the ends areas which preferably taper outwards (29a, 29c) so that the measurement coil (11) is attenuated in a different manner. The voltage recorded at the output of the circuits thus has a linear characteristic curve corresponding to the movement of the measurement coil (11) relative to the measurement tube (27). It is possible to balance out the linearity errors in the voltage divider circuit (14) or bridge circuit, as well as the measurement errors in the measurement coil (11) due to the inhomogeneous magnetic field.</p> |
