Digital Single Channel Optical Surveillance System (DSOS)

The Digital Single Channel Optical Surveillance System (DSOS) is designed for unattended one-camera surveillance for safeguards. For remote applications, the camera and control/recording unit can be installed at separate locations (up to 1200 meters). The system is ready for remote connections with or without an additional server. The functions of the DSOS are almost identical to those of the All In One System (ALIS).

The DSOS has been developed for safeguards surveillance applications requiring the camera and the control/recording console to be separated. DSOS consists of two units: the camera unit (on top) and the control and recording unit (bottom part). The camera unit includes a CCD camera and a Digital Camera Module DCM-14. The control and recording unit is equipped with a second DCM-14 that serves as the recording device, the monitor DCMVT 100, and a universal power supply. The DSOS is designed to fit into a MIVS console; however, other mechanical arrangements are possible. If a redundant DSOS is needed, two totally independent systems can be mounted next to each other.

The DSOS is a one-channel digital image surveillance system using VDIS components. DSOS enables the user to perform a quick setup of the system as well as easy retrieval of the recorded data without the need for additional equipment (e.g. no monitor or keyboard). The setup menus appear on the DCMVT 100 screen, and the different selections can be made using the built-in jog dial (pointing device) on the right hand side of the module. The CCD camera view can also be controlled by the DCMVT 100 monitor when switched to “live video”. In addition, the monitor displays summary event data at the end of the surveillance period.

NORMAL OPERATION

Normally the DSOS is powered by mains. In the event mains is lost, the DCM-14 inside both the camera and recording/control units are powered by Lithium-Ion batteries. The backup is sufficient for storing 1500 images in each DCM-14. This is equivalent to five days at 5-minute intervals. Each DCM-14 requires a PC-Card; the one in the recording unit stores the images and related data and the one in the camera unit serves as a backup. The required capacity of the PC-Card per inspection interval depends on the picture-taking interval set by the user (five seconds to a maximum of 18 hours), as well as the complexity of the image information. An image with low granularity will require substantially less storage capacity (e.g. 9 KB/image) than an image with high granularity (up to 20 KB/image). The image data compression algorithm implemented into the DCM-14 permits the storage of approximately 60 images per megabyte of PC-Card storage. Front-end scene change detection is also available in the DSOS. The DSOS system offers a variety of operational modes, e.g. different parameters can be set for day and night surveillance. Another highlight is the delayed start feature. This feature allows the user to preset a date in the future to start the system without a second visit to the facility. When using front-end scene change detection, the “history” of an event can be recorded at predetermined sequences before and after the event (or trigger) occurred.

In the event of a mains loss, the Lithium-Ion battery guarantees a reliable operation without loss of surveillance. The review of recorded images is possible with any PC, laptop, or desktop running Windows^® 98, Windows NT^®, Windows 2000, or Windows XP.

CCD – CAMERA FEATURES

The CCD camera used in the DSOS is a highly compact, low power camera manufactured by Sony with high sensitivity and an auto iris lens (Sony^® OEM product). A range of auto iris lenses and two different video standards (CCIR and EIA) make this camera very flexible. Because of its compactness and how easily the camera can be installed, the complete camera can be changed to adapt to a specific angle of view rather than changing the lens.