FIELD: physics, acoustics.
SUBSTANCE: acoustic log comprises clock generator, creator of radiation program, power amplifier, acoustic antenna and receiving-indicator device. Log contains sequential circuit from trigger with two separate inlets that serve for connection of regular echometer, key circuit with two inlets, counter and decoder, outlet of which is connected to creator of radiation program. Reference frequency generator is connected to the second inlet of key circuit. Inlet of trigger controlled by probing pulse of echometer is connected to counter reset circuit, and inlet controlled by impulse reflected from bottom is connected to command inlet of decoder.
EFFECT: higher reliability and provision of automatic switching of radiation modes, as well as connection of continuous radiation mode at shallow depths underkeel.
2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| HYDROACOUSTIC LOG | 1975 |
|
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