| 摘要 |
A system of electromagnetic sounding of earth’s crust relates to contact-less search of present heterogeneities through measurement of amplitude and phase of electromagnetic wave caused by heterogeneities of the massif that is studied, and can be used for search of liquid, gaseous and solid minerals. The system comprises two modules – transmitting and receiving ones, emitting and measuring antennae, power amplifier, frequency synthesizers, microcontrollers, GPS modules, transducer, synchronous amplitude detector, frequency former-divider, low frequency filter, analog-to-digital converter, personal computer. The transmitting module additionally comprises the first multiplier of frequency of synchro-pulses output of which is connected to the input of the reference signal of the first frequency synthesizer, and the input is connected to the output of synchro-pulses of the first GPS module. Receiving module additionally comprises the second amplifier of frequency of synchro-pulses output of which is connected to the input of the reference signal of the second frequency synthesizer and to the input of the frequency former-divider, and the input is connected to the output of synschro-pulses of the second GPS module. The control inputs of the first frequency multiplier are connected to the outputs of the first microcontroller, and the control inputs of the second frequency multiplier are connected to the outputs of the second microcontroller. The technical result is in increase of accuracy and noise immunity of measurement, this simplifies hardware realization of the device and decreases overall dimensions and power consumption. |
