| 摘要 |
A fluid seal (16) is joined to a seal carrier (14), and a magnetoresponsive sensor (18) is coupled to a carrier to sense the polarities of a magnet (24) borne on a rotatable shaft (22). The seal carrier (14), with the incorporated sensor (18), is arranged about the shaft, and leads (20) from the sensor (18) transmit an output signal voltage which corresponds to, or is proportional to the speed of rotation of the shaft. Depending upon the type of sensor employed, the signal voltage will be of repeatedly changing amplitude (i.e., pulsed or sine wave), or of given amplitude, in which the signal goes from zero to the given amplitude, to zero cyclically, or the sine wave amplitude/voltage increases with increasing speed, or pulse widths which diminish with speed acceleration. |
