|
|
|
|
|
|
|
| Mechanical A system wouldn't be complete without an enclosure to protect the internal electronics from shock, vibration, and temperature extremes. Shown below is the RF stack that is comprised of separate VHF (144-148MHz) and UHF (420-450MHz) transceivers and a diplexer. An internal shield is used to mechanically secure the modules as well as provide some RF shielding. The box is constructed of light-weight, ¼"- 90° aluminum channel. The aluminum channel is riveted together to form a strong shell. The enclosure is covered with double, ¼" foam core board. The foam core is covered with space blanket to provide additional insulation. An internal frame is added to provide a double sided mounting surfaces for the various subsystems. Velcro is used to secure the side panels to the aluminum frame. 
RF stack. Shown below is the processor section comprised of the payload computer, RS-232 driver, and pressure sensor. Modules are mounted independently to allow for easy upgrade and repair. For example, the RS-232 module can be upgraded to a Bluetooth module. For reliability, all internal connections are made with locking connectors and redundant, twisted pair wiring.
|
 |
|
Copyright © 2001-2009, KD7LMO |
|
Web space provided by ESS, Inc. for all your consulting needs. |
