| 摘要 |
A system for electro-acoustic monitoring of main pipelines comprises zonal computer for data collection and control, linear measuring devices each of which has exchange controller, source of electric power supply, synthesizer of timing and heterodyne frequencies, receiving device for acoustic signals of damages, acoustic detector of damage signals, amplifier of damage signals, electro-acoustic transformer-receiver of acoustic power. A device of acoustic communication comprises a processor of communication and control signals, a former of analog message signals, a digit-analog transformer, a low frequency filter, an amplifier of power of message channels, reception-emission communication channels, reversing electro-acoustic transformers, a notch filter of sonic frequency of power channel, a signal switcher, an amplifier of communication signals, analog inputs of the processor of communication and control signals, a digital input-output of internal control bus. The electro-acoustic transformers-emitters of acoustic vibrations, power channel receivers, electro-acoustic inverters of communication channel are installed on component acoustic waveguide. |
