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Plan of presentation

This presentation discusses the design and development of CCD cameras with USB2.0 and Gigabit interfaces for the Pi of The Sky project. It includes camera specification, prototypes, gigabit ethernet interface, final version design, and more.

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Plan of presentation

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Presentation Transcript

  1. CCD Camera with USB2.0 & GIGABIT interfaces for the Pi of The Sky ProjectGrzegorz KasprowiczPERGdr inż. Krzysztof PoźniakIn cooperation with Soltan Institute for Nuclear Studies and CFT PAN dr hab. Grzegorz Wrochnadr hab. Lech Mankiewicz

  2. Plan of presentation • Camera specification • Prototypes (test board,K1,K2) • Gigabit ethernet interface • Final version design (K31) • Ethernet controlled power switch • Summary

  3. Aim of presented work • General : building set of CCD Cameras for the Pi of The Sky project • Currently: design and development of K31 camera with gigabit interface

  4. Camera Specification: • Sensor: Fairchild CCD442A 2048x2048 pixels • USB 2.0 & Ethernet 1000T Interface • Programmable exposure and readout time • (1s-100s) • uC software and FPGA upgrade via USB • Peltier cooling of CCD • Humidity and temp. measurement inside and outside chamber (CCD, case, ambient ) • Build-in mechanical shutter • Focusing motor control

  5. Prototype : K1 (2003) Power supply board Top view Main board Side view

  6. Working K2 cameras (2004) Installed in Las Campanas in Chile

  7. K2 Camera Status • 2 cameras installed in Las Campanas in Chile • works continuously since may 2004 collecting hundreds GB of data • many optical flashes and other variable objects detected • USB2.0 : Too short maximum cable length (5m) • problems with transmission reliability • problems with PC’s redundancy

  8. Gigabit Ethernet interface prototype Gigabit Network adapter PCI connector LPF 210Ms ADC supply FPGA SDRAM ATX power connector USB connector USB2.0 interface

  9. Gigabit interface schematic USB 2.0 Microcontroller PCI Gigabit Ethernet Interface Card PLL PCI Master Registers 1000T PCI PCI Slave RX/TX Buffers SDRAM Controller DATA SDRAM FIFO 2x 1KB Main control FPGA CCD DATA

  10. New K31 camera prototype with Ethernet interface - under development Gigabit MAC+PHY FPGA Ethernet trafo CCD drivers SDRAM ADC DC/DC 3.3V Connectors USB & Eth CCD USB2.0 interface CCD supply Motor driver pre-amplifier Supply drivers Digital & supply board Analog board

  11. Ethernet controlled power switch • 2 switched circuits: 3+2 sockets • TCP/IP/UDP protocol support • 128bit encryption • Used in „Pi of the Sky” in case of emergency - hardware reebot of whole system

  12. Achieved results: Generally: • Construction and tests of K1 camera prototype and the shutter • Construction and tests of two K2 cameras Recently: • Development of K31 camera prototype with Gigabit Ethernet interface - still under development

  13. Plans for future: • Starting production of K31 cameras • Readout noise reduction to less than 10e • Implementation of more advanced algorithms like Windowing, Drift Scan, Tracking. • New cameras with 60mm diameter for telescope applications • Implementation of over-sampling techniques and “Zero noise CCD” concept

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