Features
Captures still images upon hardware or software commands Stores single video frames on Compact Flash and/or internal hard drive JPEG utility compresses images to save storage space and speed downloads Downloads images via Ethernet port Includes Embedded Linux
Description
The 2411 is a set of Sensoray PC/104+ boards programmed to capture single frames from composite sources such as radar, ultrasonic sources and video cameras. Frame capture may be triggered from a software command or from an external switch. Stored images may be compressed as JPEGS before they are downloaded via the unit’s Ethernet port and/or stored in internal memory.
Configurations
The simplest configuration, model 2411-1, stores captured images in the CPU’s SDRAM. Model 2411-2 adds removable compact flash and model 2411-3 uses hard disk storage in place of the compact flash. A fourth configuration, model 2411-4, includes compact flash plus hard disk storage.
Image compression
A JPEG compression function allows efficient use of internal storage and speeds downloading stored images. Typical compression factors of 20:1 yield good quality images.
Image capture
Images are captured with Sensoray’s 311 frame grabber that uses the popular BT-878A capture chip. The 311’s four-channel multiplexer allows selecting any one of four composite inputs or one S-video input and three composite signals. One of the 311’s general-purpose digital I/O lines has been programmed to initiate a frame capture upon detecting a contact closure from an external switch.
Image storage
Captured frames are initially stored in the CPU’s RAM after which they may be transferred to a RAM disk or to optional compact flash or a hard drive. The optional storage requires the addition of Sensoray’s model 340 CardBus adapter.
FTP server
The 2411 is programmed with an FTP server to facilitate image transfers to a remote computer. The FTP server may also be used to download custom application programs. The server is accessible from a command line or from a browser such as Windows Explorer or Konqueror.
Linux OS
The 2411 uses an abbreviated form of Suse Linux. The OS resides in flash memory chip soldered to the 301 CPU’s. Approximately 6 Mbytes is available for user applications. The 2411 is not available with other operating systems or other compiled Linux kernels. Programming information is detailed in an instruction manual at the 2411’s web page.
Unused resources
Model 2411 has some unsupported communication ports. The basic unit, model 2411-1, has one unused serial port. Adding model 340 to the stack for models 2411-2, 2411-2 and 2411-4 adds two unsupported USB 1.1 ports plus an additional 10/100 BaseT network port. Although these resources are not supported by the 2411, Linux drivers are available at the 340’s web page.
Power supply
The PC/104+ card stack is powered from model 207 power supply. Input voltages may be from 9 to 36 VDC. The unit can supply 5 and +/- 12 volts to external devices.
Software and Manuals
2411 Instruction Manual >> Released 9/16/05
Mechanical Drawings and Images
Configurations
| | Specifications | | | Operating temperature range | 0 to 70 C | | Number of video channels | 4 composite or 1 S-video and 2 composite | | Video formats | NTSC and PAL | | JPEG compression | Programmable file size determines ratio | | D1 image capture rate | 2 frames/s including compression | | D1 image file sizes | 20 to 80 k-bytes for JPEG 900 k-bytes for bit map | | 10/100 BaseT Ethernet port | Intel 82C599 NIC | | Number of digital I/O | 3 | | Operating system | Linux with 2.4 kernel | | Media for image storage | SDRAM, Compact flash, Hard drive | | Power supply input voltage range | 9 to 34 VDC | | Power supply input current | 250 mA without hard drive or compact flash | | |
