BriGuard: a lightweight indoor intrusion detection system based on infrared light spot displacement. Issue 3 (1st May 2015)

• Record Type: Journal Article
• Authors: Liu, Leibo; Zhang, Weilong; Deng, Chenchen; Yin, Shouyi; Wei, Shaojun
• Is Part Of: IET science, measurement & technology. Volume 9:Issue 3(2015)
• Page Start: 306
• Page End: 314
• Publication Date: 2015-05-01
• Subjects: infrared detectors -- CMOS image sensors -- diffraction gratings -- security of data -- video surveillance -- optical modulation -- infrared imaging; lightweight indoor intrusion detection system -- infrared light spot displacement‐based surveillance system -- BriGuard -- radar -- optical diffraction grating -- light spot matrix image generation -- complementary metal oxide semiconductor image sensor -- light spots coordinates extraction -- light beam modulation -- lightweight algorithm -- zero false detection rate -- form factor -- wavelength 940 nm; Measurement -- Periodicals; Electrical engineering -- Periodicals; Electronics -- Periodicals; Nanotechnology -- Periodicals; Electromagnetism -- Periodicals; Medical instruments and apparatus -- Periodicals; 621.3
• DOI: 10.1049/iet-smt.2013.0171
• Languages: English
• ISSNs: 1751-8822

Abstract

Abstract : Indoor intrusion detection systems are widely implemented in many special departments and environments. Owing to the special target market, several specific features of such systems are required including high accuracy, high performance, high concealment and ease of deployment. In this study, the authors proposed an infrared light spot displacement‐based surveillance system for indoor intrusion detection. This system, named BriGuard, shares a similar idea with radar. A 940 nm infrared light beam goes through an optical diffraction grating to generate light spot matrix imagery in the view of a complementary metal oxide semiconductor image sensor. The coordinates of the light spots are extracted and recorded. When someone enters the monitored area, the imaging plane changes and leads to a variation of the pre‐recorded light spots coordinates. The light beam is modulated in order to be distinguished from the light in the environment. The lightweight algorithms require little computation power and data storage. BriGuard achieves a nearly zero false detection rate while covering a distance up to 10 m. It can process 30 full HD (1920 × 1080) frames per second. More importantly, because of unnoticeable infrared lights and very small form factor, the whole detection equipment is very hard to observe.