Mechanical design of alarm system for vehicles

This device will consist of two separate packages connected to each other by a cable and to the vehicles power supply (battery). One package is to be located in the passenger compartment in view of the driver. The other is to be mounted on the lower rear of the car for an unobstructed view to the rear. They are separate units with a cable that is not attached to the electronic units until after installation. Environmentally the electronics will see a large range of temperature and humidity as well as shock and vibration. The outside package must also withstand direct water and dirt from almost all angles as well as direct shock. The cable must also be able to withstand some abrasion due to constant vibration. The interior package must be mounted in view of the driver but not block the view. In addition it must be visually pleasing, must be able to mount on various types of surface materials and on anything from horizontal to vertical surfaces. The cable to the dash unit must be able to be routed either through a hole in the dash or under molding with minimum exposure. Using these general criteria a preliminary set of drawings was prepared on a CAD system and sent via E mail to the other engineering groups for comments. When the comments were received the drawings were revised and awaited the final design of the circuit boards as well as the final hardware choices. At this point final drawings were made and sent to the shop for prototypes.