发明名称 |
METHOD OF DETECTING UNAUTHORISED ACCESS INTO PROTECTED FACILITIES |
摘要 |
FIELD: alarm systems. ^ SUBSTANCE: present invention pertains to security technology and can be used for detecting unauthorised access into facilities. The method involves transmission of an acoustic signal, reception and combined processing of the transmitted and received signals. Unauthorised access is determined from the change in parameters of mutual coupling of the signals. The acoustic signals are transmitted and received at different sides of the protected facilities. Inside the facilities and outside the facilities, a cross-correlation function of the transmitted and received signals is formed. Unauthorised access is determined from the change in the value of the maximum of the cross-correlation function of the transmitted and received signals. ^ EFFECT: increased efficiency of the method of detection, particularly increased accuracy. ^ 1 dwg |
申请公布号 |
RU2342708(C1) |
申请公布日期 |
2008.12.27 |
申请号 |
RU20070139742 |
申请日期 |
2007.10.26 |
申请人 |
GOSUDARSTVENNOE OBRAZOVATEL'NOE UCHREZHDENIE VYSSHEGO PROFESSIONAL'NOGO OBRAZOVANIJA KAZANSKIJ GOSUDARSTVENNYJ TEKHNICHESKIJ UNIVERSITET IM. A.N. TUPOLEVA |
发明人 |
SHCHEGLOV MIKHAIL JUR'EVICH;KOLCHERIN DMITRIJ VLADIMIROVICH |
分类号 |
G08B13/00 |
主分类号 |
G08B13/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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