KEYWORDS: Video surveillance, Sensors, Cameras, Capacitors, Transmitters, Imaging systems, Data conversion, Image processing, Data transmission, Data processing
The passive video surveillance system is designed in this paper. At first, it captures images through the camera sensor and displays the image in the client program without battery and complicated wiring. This system consists of three modules: energy harvesting, data transmission, and data processing. Firstly, the system transmits UHF radio frequency signals to the environment through a signal transmitter, then the system converts the received radio frequency signal into an electrical signal and stores it in a on-board supercapacitor to supply power to each device in the system. The system dispatches the image capture task through a low-power microprocessor, and transmits the data to the host under the same local network through a Wi-Fi module.
Spacecraft cluster flight, which is a novel multi-spacecraft flight mode, has become an important research direction of distributed space system for the future, especially has unique advantage in continuous detection on area. Aiming at the satellite group formed by several satellite clusters, an orbit design method satisfying the long-term continuous and stable area-coverage is proposed. The basic dynamic model is built under the influence of J2 perturbation, the calculation method of "node period" and "node day" is put forward and then the long-term continuous stable group orbit initialization design conditions are built. Validation of orbit design is made under the typical scenario and through the STK simulation, the simulation results show that this design method can realize the fixed time revisiting and long-term stability of coverage of the target area.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.