| 摘要 |
<p>PURPOSE:To intend reduction of coil voltage by dividing a transmission coil plurally and by connecting the divided parts with condensers. CONSTITUTION:Radio frequency wave from a generator 1 and rectangular pulses from a generator 2 are fed to an amplifier 3 to produce a row of radio frequency pulses, the row of radio frequency pulses is fed into a transmitting/ receiving coil 5 through a tuning circuit 4 and a detection object 6 housing an object substance, is irradiated by pulse shaped radio frequency magnetic field. The coil 5 is a solenoid coil divided into segments 15 and connecting the segments 15 with capacitors 16 of the same electrostatic capacitance and being put in series among the segments 15. With this procedure, inductance of each coil decreases and also voltage across each coil can be reduced. Electromagnetic wave induced at the substance 7 is processed into Fourier transformation by a processor 12 through the coil 5, the circuit 4, an amplifier 8, a phase detector 9, an amplifier 10 and an accumulator 11, and finally NQR signals from the substance 7 are detected being discriminated obviously from noise.</p> |
