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Polulu Redshift Labs UM7 Orientation Sensor TTL / SPI 4 V - 5.5 V EKF
The UM7 orientation sensor from Redshift Labs is an Attitude and Heading Reference System (AHRS) that contains a three-axis accelerometer, rate gyro, and magnetometer. It combines this data using an Extended Kalman Filter to produce attitude and heading estimates.
Features:
- Sensors and processing
- Excellent gyro bias stability over temperature
- Adjustable low-pass filter and EKF settings provide customizable performance for various applications
- States and sensor data synchronized to GPS position and velocity using optional external GPS module
- Allows for alignment calibration and third-order bias and scale factor temperature compensation for accelerometers, gyros, and magnetometer
- Magnetometer soft and hard-iron calibration can be performed through the serial interface software
Communication:
- Output data:
- Attitude and heading (Euler angles)
- Attitude quaternion
- magnetometer, accelerometer, gyro data
- GPS altitude, position, velocity (with optional external GPS)
- 3.3 V TTL serial interface (UART) with baud rates up to 921,600 bps can stream data or provide updates on request
- Note: the main UART pins, TX, and RX, are 5V-tolerant and can be directly connected to 5 V systems that are guaranteed to read 3.3 V as high
- Transmits data using human-readable NMEA strings (up to 100 Hz broadcast), binary packets for higher efficiency (up to 255 Hz broadcast), or a combination of both
- Flexible communication architecture allows UM7 to transmit any combination of data at individually adjustable rates
- Connects to the Redshift Serial Interface software to allow for real-time plotting of sensor data, logging, device configuration, and magnetometer calibration
- SPI interface available through expansion connector
Specifications:
- UM7 (with enclosure):
- Dimensions: 1.09″ × 1.12″ × 0.37″ (28 mm × 28 × 9 mm) without mounting tabs
- Weight: 0.26 oz (7.5 g) without cable
- Operating voltage: 4 V to 5.5 V
- I/O logic level: 3.3 V (with 5V-tolerant main UART pins, TX and RX)
Attitude and heading
- EKF estimation rate: 500 Hz
- ±1° typical static pitch/roll accuracy
- ±3° typical dynamic pitch/roll accuracy
- ±3° typical static yaw accuracy
- ±5° typical dynamic yaw accuracy
- 0.5° angle repeatability
- <0.01° angular resolution
Documents:
Redshift Serial Interface software
Tags: polulu, redshift, labs, um7, orientation, sensor, ttl, spi, 5.5, ekf, accelerometers, gyroscopes, and, magnetometers