| 摘要 |
FIELD: technology for recognizing seismic signals with low signal/noise ratio, possible use during engineering of devices for alarm signaling based on seismic principle. ^ SUBSTANCE: device contains input synchronizing amplifier, band filter and two signal processing channels. First channel performs selection of signals on basis of amplitude-frequency signs. Second channel performs estimation of decrease gradient of spectral characteristic in whole selected frequency range, by splitting it on several sub-ranges and measuring relations of signal energies between them. By using analog and digital means, signal for forbidding passage of impulse through first channel is formed, if decrease gradient of spectral characteristic is greater than decrease gradient of experimentally determined boundary curve. ^ EFFECT: increased trustworthiness of recognition of seismic signals on background of intensive interferences from remote sources. ^ 2 dwg |
