Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.apo.nmsu.edu/arc35m/Instruments/ARCTIC/Development/ImagerPDR/imager-sw.pdf Дата изменения: Thu Dec 5 20:44:30 2013 Дата индексирования: Thu Feb 27 21:02:28 2014 Кодировка: Поисковые слова: mercury

ICC/Hub Software Overview
Requirements
· · · · Monitor and control the instrument's robotics. Acquire and save camera data. Create the logical representation of an instrument that plugs into the APO observing control system. Telemetry data interfaces to APO monitoring system.

Design
· · Computer and software is in the computer room, named the ICC, which means Instrument Control Computer. Instrument's robotics and telemetry uses smart Ethernet I/O devices.


Instrument Control Computer Requirements
· · · · · PCI fiber interface card for the camera. CCD readout is 1 MHz, 4 amplifiers, and reads out at 4 megapixels/sec Software for simple windowing and binning and acquisition. Software to operate the imager instrument with APO's instrument protocol, http://www.apo.nmsu.edu/35m_operations/ICCDesign/. Software to interface to APO's telemetry archive, http://www.apo.nmsu.edu/35m_operations/35m_Telemetry.html.


Instrument Control Computer Design
· · · Scientific Linux on a 3U server with a suitable PCI slot. Latest Leach Linux drivers and library that work with the camera. Modest computer loading - can be implemented on a computer shared with other ICCs.


Imager Control Computer Features
· Configurable gain and clocking for three readout speeds: 100 KHz, 450 KHz, and 900 KHz. · Windowing - single window binning and subframes · Exposures with feedback on flush, integration and readout status. · Ability to pause and abort exposures. · Filter wheel changes for a variety of different wheel types (mix of filter sizes and number of filters in a wheel). · Shutter control (open/close).


Imager Robotics and Telemetry Requirements

· · · · · ·

Stepper motor for filter wheel. Digital I/O. RS232 for Lakeshore. Analog input for airline pressure. Temperature range -25C to 70C. Low power - 20W.


Imager Robotics and Telemetry Solutions
·Ethernet modules for each function, or ·USB modules and an embedded linux system, or ·An embedded PC104 with interface cards necessary for time-critical response. For now, no decision has been made on this.