Inertial navigation peripheral/System design

System schematics

note: Greg fails at typing "inertial"

Software Systems

Microcontroller

The PIC device will connect to the laptop via USB and provide position/bearing values when requested. It will perform onboard numeric integration, and return values in meters and percent of circles.

Python "Driver" Class

The driver class for the Locograph will be a Python class called "Locograph". Locograph will handle connecting to the USB device using libusb, meaning a user of this class merely needs to instantiate one and start asking it for values.

Here is something like a UML diagram for Locograph:

Locograph

A Locograph has the following attributes:

• position: A tuple of length three - (x, y, z) - expressing coordinate change relative to the laptop in the global Cartesian space.
• bearing: A number - 0 to 1 - expressing how much of a rotation the laptop has completed in the global Cartesian space.

A Locograph offers the following methods:

• getPosition(): returns self.position
• getBearing(): returns self.bearing
• _updateFromDevice(): polls the USB device for new values.
• _mapDevice(): sets up the USB device originally.
• reset(): client asks for coordinate reset.
• _reset(): ask USB device for coordinate reset.

Form factor

(insert sketches)

(include sketch model picture)