This paper proposes a novel bidirect i o nal anti-theft alarm scheme through detecting the magnetic field.The theoretical background and analysis of the approach of anti-theft alarm are pre sented.The circuit of burgl...This paper proposes a novel bidirect i o nal anti-theft alarm scheme through detecting the magnetic field.The theoretical background and analysis of the approach of anti-theft alarm are pre sented.The circuit of burglar alarm is designed,fabricated and tested,and C language program is implemented and debugged.Feasibility of the de veloped scheme is proved by the experiments.展开更多
Produced by the Beijing Taidu Automobile Safety Equipment Manufacture Co. Ltd., the Taidu electronic anti-theft alarm system has a single key system and easy operation. The system has a cover to protect it from accide...Produced by the Beijing Taidu Automobile Safety Equipment Manufacture Co. Ltd., the Taidu electronic anti-theft alarm system has a single key system and easy operation. The system has a cover to protect it from accidental triggering. Indicators display its remote control function, controlling all the locking and unlocking actions for an automobile’s doors within a range of 50 metres. The system has a展开更多
Nowadays, image copyright protection is one of the key points of information security in the field of education. Based on the transient property of human vision, the anti-theft and copyright protection strategies are ...Nowadays, image copyright protection is one of the key points of information security in the field of education. Based on the transient property of human vision, the anti-theft and copyright protection strategies are proposed based on the idea of animation synthesis. In this paper, experiments are designed and compared from multiple perspectives. The results show that the strategy based on animation synthesis can not only ensure the browsing effect of images, but also effectively achieve the purpose of preventing interception via screenshot and protecting the legitimate rights of the original images.展开更多
The triboelectric nanogenerator （TENG）, based on the well-known triboelectric effect and electrostatic induction effect, has been proven to be a simple, cost effective approach for self-powered systems to convert am...The triboelectric nanogenerator （TENG）, based on the well-known triboelectric effect and electrostatic induction effect, has been proven to be a simple, cost effective approach for self-powered systems to convert ambient mechanical energy into electricity. We report a flexible and transparent paper-based triboelectric nanogenerator （PTENG） consisting of an indium tin oxide （ITO） film and a polyethylene terephthalate （PET） film as the triboelectric surfaces, which not only acts as an energy supply but also as a self-powered active sensor. It can harvest kinetic energy when the sheets of paper come into contact, bend or slide relative to one another by a combination of vertical contact-separation mode and lateral sliding mode. In addition, we also integrate grating-structured PTENGs into a book as a self-powered anti-theft sensor. The mechanical agitation during handling the book pages can be effectively converted into an electrical output to either drive a commercial electronic device or trigger a warning buzzer. Furthermore, different grating-structures on each page produce different numbers of output peaks by sliding relative to one another, which can accurately act as a page mark and record the number of pages turned. This work is a significant step forward in self-powered paper-based devices.展开更多
The theft prevention for cultural relics in museums,field excavation sites,and temporary exhibition events is of extreme importance.However,traditional anti-theft technologies such as infrared monitoring and radio fre...The theft prevention for cultural relics in museums,field excavation sites,and temporary exhibition events is of extreme importance.However,traditional anti-theft technologies such as infrared monitoring and radio frequency identification are highly costly,power-consuming,and easy to break.Here,a transparent,ultrathin,and flexible triboelectric sensor(TUFS)with a simple and low-cost method is proposed.With a thickness,weight,and transmittance of 92μm,0.12 g,and 89.4%,the TUFS manifests superb concealment.Benefiting from the characteristic of triboelectric nanogenerators,the TUFS responds effectively to common cultural-relic materials.Moreover,distinguished electrical responses can be obtained even for very small weights(10 g)and areas(1 cm^(2)),proving the sensitivity and wide range of use of the TUFS.Finally,we construct a concealed cultural-relic anti-theft system that enables real-time alarming and accurate positioning of cultural relics,which is expected to strengthen the security level of the existing museum anti-theft systems.展开更多
基金National Natural Science Foundation of China (No.51105267, No.91123036)China Postdoctoral Science Foundation(No.2011M500542, No.2012T50248)+2 种基金National Research Foundation for the Doctoral Program of Higher Education of China(No.20111402120007)Shanxi Provincial Foundation for Returned Scholars (No.2011x10)863 Project (No.2011AA040404, No.2013AA041109)
文摘This paper proposes a novel bidirect i o nal anti-theft alarm scheme through detecting the magnetic field.The theoretical background and analysis of the approach of anti-theft alarm are pre sented.The circuit of burglar alarm is designed,fabricated and tested,and C language program is implemented and debugged.Feasibility of the de veloped scheme is proved by the experiments.
文摘Produced by the Beijing Taidu Automobile Safety Equipment Manufacture Co. Ltd., the Taidu electronic anti-theft alarm system has a single key system and easy operation. The system has a cover to protect it from accidental triggering. Indicators display its remote control function, controlling all the locking and unlocking actions for an automobile’s doors within a range of 50 metres. The system has a
文摘Nowadays, image copyright protection is one of the key points of information security in the field of education. Based on the transient property of human vision, the anti-theft and copyright protection strategies are proposed based on the idea of animation synthesis. In this paper, experiments are designed and compared from multiple perspectives. The results show that the strategy based on animation synthesis can not only ensure the browsing effect of images, but also effectively achieve the purpose of preventing interception via screenshot and protecting the legitimate rights of the original images.
文摘The triboelectric nanogenerator （TENG）, based on the well-known triboelectric effect and electrostatic induction effect, has been proven to be a simple, cost effective approach for self-powered systems to convert ambient mechanical energy into electricity. We report a flexible and transparent paper-based triboelectric nanogenerator （PTENG） consisting of an indium tin oxide （ITO） film and a polyethylene terephthalate （PET） film as the triboelectric surfaces, which not only acts as an energy supply but also as a self-powered active sensor. It can harvest kinetic energy when the sheets of paper come into contact, bend or slide relative to one another by a combination of vertical contact-separation mode and lateral sliding mode. In addition, we also integrate grating-structured PTENGs into a book as a self-powered anti-theft sensor. The mechanical agitation during handling the book pages can be effectively converted into an electrical output to either drive a commercial electronic device or trigger a warning buzzer. Furthermore, different grating-structures on each page produce different numbers of output peaks by sliding relative to one another, which can accurately act as a page mark and record the number of pages turned. This work is a significant step forward in self-powered paper-based devices.
基金the National Natural Science Foundation of China(No.61503051).
文摘The theft prevention for cultural relics in museums,field excavation sites,and temporary exhibition events is of extreme importance.However,traditional anti-theft technologies such as infrared monitoring and radio frequency identification are highly costly,power-consuming,and easy to break.Here,a transparent,ultrathin,and flexible triboelectric sensor(TUFS)with a simple and low-cost method is proposed.With a thickness,weight,and transmittance of 92μm,0.12 g,and 89.4%,the TUFS manifests superb concealment.Benefiting from the characteristic of triboelectric nanogenerators,the TUFS responds effectively to common cultural-relic materials.Moreover,distinguished electrical responses can be obtained even for very small weights(10 g)and areas(1 cm^(2)),proving the sensitivity and wide range of use of the TUFS.Finally,we construct a concealed cultural-relic anti-theft system that enables real-time alarming and accurate positioning of cultural relics,which is expected to strengthen the security level of the existing museum anti-theft systems.
