| 摘要 |
Device for search of heterogeneities in earth crust, in massifs of rocks, has emitting and measuring antennae, transformer connected with first input to measuring antenna, block for formation of two signals with constant frequency difference that includes generator of support frequency and connected with first output to emitting antenna through power amplifier and with second output to second input of transformer, at that output of transformer is connected to selective amplifier. Block for formation of two signals with constant frequency difference has first and second frequency synthesizers inputs of which are connected to output of generator of support frequency and to microcontroller, outputs of those are outputs of block for formation of two signals with constant frequency difference, respectively, at that second frequency synthesizer is arranged with possibility of change of initial phase of output signal, besides that additionally are included analog-digital transformer, frequency divider, low frequency filter, synchronous amplitude detector one input of which is connected to output of selective amplifier and second input is connected to output of frequency divider with constant division coefficient input of which is connected to generator of support frequency of block for formation of signal with constant frequency difference, at that outputs of analog-digital transformer are connected to micro-controller, control input of analog-digital transformer is connected to micro-controller, and input of analog-digital transformer is connected to output of synchronous amplitude detector through low frequency filter. |
