PORTLAND, Ore. Inertial measurement units are used to track both linear and rotational motion in devices like gaming or remote controls.
MEMS chip maker InvenSense Inc. said it has integrated an IMU on a chip using a digital motion processor (DMP) that performs 6-axis sensor fusion of an internal 3-axis gyroscope and an external 3-axis accelerometer.
IMUs enables motion processing without adding system processing overhead, said Michael Maia, vice president of InvenSense's Gaming and 3-D User Interface Business Unit. He said its IMU-3000 reduces power consumption whie easing integration into gaming controllers and 3-D remote controls.
According to the company, Nintendo's use of inertial sensors in its Wii game controller gave it a 43 percent share of the game console market in 2009. The advance prompted Sony and Microsoft to add similar motion sensors to their platforms.
A secondary I2C port was used as an interface to third-party digital accelerometers. The on-chip DMP fuses the data stream with the stream generated by internal gyroscopes, then deliver a complete 6-axis quaternion output to a primary I2C port.
Handheld controllers can then use the inertial information in the fused data stream to move on-screen cursors, make menu selections and emulate physical objects like swinging a baseball bat.