| 摘要 |
<p>A triaxial AC magnetic field analyzer/dosimeter instrument measures the field strength of three mutually orthogonal AC magnetic field components at a plurality of different frequencies in a frequency range of interest and stores corresponding data which may be processed to indicate the field strengths at each of the frequencies and/or the sum of the field strengths over the frequency range of interest. The instrument is computer controlled by a computer (LC) and has three measurement channels corresponding to respective magnetic field components. Each channel includes a sensor coil (10), a clock controlled, switched capacitor, bandpass filter (14), and a total root mean square detector (22). The passband of each filter is swept across the desired frequency range by a varying frequency clock.</p> |
