Rev 964 | Only display areas with differences | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed
| Rev 964 | Rev 965 | ||
|---|---|---|---|
| 1 | LoCoHead - The low-cost head tracker project |
1 | LoCoHead - The low-cost head tracker project |
| 2 | Mathias Kreider, 2011 |
2 | Mathias Kreider, 2011 |
| 3 | 3 | ||
| 4 | LocoHead modules are approved for private and commercial use. |
4 | LocoHead modules are approved for private and commercial use. |
| 5 | 5 | ||
| 6 | LocoHead source code and hardware designs are for private use only, |
6 | LocoHead source code and hardware designs are for private use only, |
| 7 | they may NOT be used in commercial software or designs. |
7 | they may NOT be used in commercial software or designs. |
| 8 | 8 | ||
| 9 | The purpose of this project |
9 | The purpose of this project |
| 10 | The goal of LoCoHead is the realisation of a lean head tracking solution in |
10 | The goal of LoCoHead is the realisation of a lean head tracking solution in |
| 11 | software and hardware. It was based on the 3-axis LSM303DLH |
11 | software and hardware. It was based on the 3-axis LSM303DLH |
| 12 | Magnetormeter / Accelerometer, including data processing and |
12 | Magnetormeter / Accelerometer, including data processing and |
| 13 | Output as a PPM or serial channel in order to control the actuators of camera mounts/gimbals. |
13 | Output as a PPM or serial channel in order to control the actuators of camera mounts/gimbals. |
| 14 | 14 | ||
| 15 | 15 | ||
| 16 | 16 | ||
| 17 | Version 0.1 utilises the Polulu breakout board with ATMEGA32L |
17 | Version 0.1 utilises the Polulu breakout board with ATMEGA32L |
| 18 | 18 | ||
| 19 | LoCoHEad - Pros |
19 | LoCoHEad - Pros |
| 20 | - Very low price in comparing two of gyro-based systems there |
20 | - Very low price, especially compared to gyro-based systems |
| 21 | - No Drift |
21 | - No Drift |
| 22 | - pitch, roll and yaw axis, ie. all-natural movement of the head is covered |
22 | - pitch, roll and yaw axis, ie. all-natural movement of the head is covered |
| 23 | - All sensor functions in one chip, no mechanical alignment / vertical boards needed |
23 | - All sensor functions in one chip, no mechanical alignment / vertical boards needed |
| 24 | - Simple interface |
24 | - Simple interface |
| 25 | - Easy sensor calibration |
25 | - Easy sensor calibration |
| 26 | - Open source software |
26 | - Open source software |
| 27 | 27 | ||
| 28 | LoCoHead - Contra |
28 | LoCoHead - Contra |
| 29 | - influenced by magnetic interference |
29 | - influenced by magnetic interference |
| 30 | - influenced by strong dynamic acceleration, esp Axial |
30 | - influenced by strong dynamic acceleration, esp Axial |
| 31 | - Lower resolution of the yaw axis (+ / - 0.5%) than that of roll and pitch (+ / - 0.05%) |
31 | - Lower resolution of the yaw axis (+ / - 0.5%) than that of roll and pitch (+ / - 0.05%) |
| 32 | 32 | ||
| 33 | Part of LoCoHead's code is based on the polulu example |
33 | Part of LoCoHead's code is based on the polulu example |
| 34 | (see polulu_LICENCE.txt) |
34 | (see polulu_LICENCE.txt) |