What is Ardu-IMU

What is Ardu-IMU ?

ArduIMU is an Inertial Measure Unit (sensors and hardware filter circuitry) plus an Arduino-compatible processor that can run our Attitude Heading Reference System (AHRS) code, based on Bill Premerlani's DCM algorithm. This hardware consists of a 3 axis accelerometer and three gyro sensors, dual power regulator (3.3v and 5v), GPS port, an Atmega328@16mhz and a lot of status LED's. It's the cheapest IMU-AHRS on the market!

IMU (Inertial Measure Unit):

An inertial measurement unit, or IMU, is an electronic device that measures and reports on a craft's velocity, orientation, and gravitational forces, using a combination of accelerometers and gyroscopes. IMUs are typically used to maneuver aircraft, including UAVs, among many others, and spacecraft, including shuttles, satellites and Landers.

The IMU is the main component of inertial navigation systems used in aircraft, spacecraft, watercraft, and guided missiles among others. In this capacity, the data collected from the IMU's sensors allows a computer to track a craft's position, using a method known as dead reckoning.

AHRS (Attitude Heading Reference System):

An Attitude Heading Reference System consists of sensors on three axes that provide heading, attitude and yaw information for aircraft. They are designed to replace traditional mechanical gyroscopic flight instruments and provide superior reliability and accuracy.

AHRS consist of either solid-state or MEMS gyroscopes, accelerometers and magnetometers on all three axes. The key difference between an IMU and an AHRS is the addition of an on-board processing system in an AHRS which provides solved attitude and heading solutions versus an IMU which just delivers sensor data to an additional device that solves the attitude solution.

AHRS have proven themselves to be highly reliable and are in common use in commercial and business aircraft. AHRS are typically integrated with Electronic Flight Information Systems (EFIS) (which are the central part of so-called glass cockpits) to form the Primary Flight Display. AHRS can be combined with air data computers to form an "air data, attitude and heading reference systems" (ADAHRS), which provide additional information such as airspeed, altitude and outside air temperature

Features of Ardu-IMU :

   

• Flat Design.
• Low cost.
• 3 Axis Accelerometer.
• 3 Axis Gyroscopes.
• Arduino Compatible.
• Source Code included and Open Source!
• Power LED (Green).
• Status LEDs (Red, Blue, Yellow).
• 1 SPI port.
• 1 I2C port (possible expansion shield with magnetometers).
• Two PWM outputs (for servos).
• GPS port.
• Protection diode.
• Serial port output with servo standard connector for easy interface with any device (Ground, 5V, TX-OUT).

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