Accession Number : AD0472159


Title :   Railroad Sabatoge Detection Research


Descriptive Note : Final technical rept. 18 Jun 1964-15 Oct 1965


Corporate Author : TEXAS INSTRUMENTS INC DALLAS SCIENCE SERVICE DIV


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/472159.pdf


Report Date : 15 Oct 1965


Pagination or Media Count : 79


Abstract : A workable detection system is designed to record sabotage activity on a one-mile section of railroad and discriminate against noise in the rail and pedestrian traffic. Elimination of false alarms and conservation of power in an RF data link at important considerations. The four features of discrimination logic are frequency filtering, amplitude threshold, pulse repetition rate, and aural monitoring. Preliminary conclusions and recommendations in First Interim Technical Report are reviewed and substantiated with specific data and appropriate changes in details. Field experiments were conducted on railroads with 5- and 6-in. rails. Electromechanical instrumentation capable of detecting seismic and acoustic waves was utilized. A third method of detection was the subject of a classified report submitted separately with First Interim Technical Report.


Descriptors :   *ACOUSTIC DETECTORS , *RAILROADS , *SABOTAGE , ATTENUATION , BROADBAND , DETECTION , DISCRIMINATORS , ELECTROMAGNETIC RADIATION , ELECTROMAGNETIC WAVE FILTERS , MONITORS , NARROWBAND , NOISE , PULSE MODULATION , RAILROAD TRACKS , SEISMOLOGY , SIMULATION , WARNING SYSTEMS , WAVE EQUATIONS


Subject Categories : Surface Transportation and Equipment
      Military Operations, Strategy and Tactics


Distribution Statement : APPROVED FOR PUBLIC RELEASE