| 摘要 |
Element consists of two transformers (6,14) with the first transformer (6) connected by its primary winding (7) with regard to exciting-sensing coil system (4) in series to the sensing channel (12) and the second transformer (14) is connected by its primary winding (15) in parallel to the sensing channel (1). The control impulse, which in sensing phase switches the load of transformers (6,14), performs decreasing of impedance on grips of primary winding (7,15) of transformers (6,14) and with them in series connected compensating capacitors (5,13) on minimum, by which is on minimum decreased the dumping of sensed signal and on maximum is increased the suppression of noise voltages penetrating from the exciting channel(1). In exciting phase there is the control impulse not generated, by means of which is provided the transmission of exciting power impulse and the protecting of sensing channel (12) against this impulse.
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