Design and analysis of intelligent temperature control and temperature compensating system of CAT for hydrogen clock

Details Design and analysis of intelligent temperature control and temperature compensating system of CAT for hydrogen clock Design and analysis of intelligent temperature control and temperature compensating system of CAT for hydrogen clock

Mar 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006pabei..24...73l&link_type=abstract

Progress in Astronomy (ISSN 1000-8349), Vol. 24, No. 1, p. 73 - 80 (2006)

Astronomy and Astrophysics

Astronomy

Astronomical Facilities And Technique, Hydrogen Clock, Cat (Cavity Auto Tuning), Temperature Control, Arm (Advanced Risc Machine), Ucos-Ii (Micro Controller Operation System)

Scientific paper

This paper presents a new design of temperature control system of hydrogen clock. By integrating three temperature control units into one system, the design can reduce size of circuit and simplify temperature control. This design includes two parts: hardware and software. In the hardware design, we select 32 bits ARM (Advanced Risc Machine) processor LPC2132, which is powerful and helpful to reduce the complexity of circuit board. In the software design, we introduce real time operation system UCOS-II (Micro Controller Operation System). By using it, we can enhance real time performance of the temperature control system. In addition, voltage of varactor which controls CAT (cavity auto tuning) in hydrogen clock may drift out of normal range, and the voltage drift will influence frequency stability and drift rate of hydrogen clock directly. Therefore, we bring forward an idea of temperature compensating for CAT, which based on the new temperature control system.

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