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The UM6 ultra-miniature orientation sensor from CH Robotics uses rate gyros, accelerometers, magnetic sensors, and an onboard 32-bit ARM Cortex processor to compute sensor orientation 1000 times per second. Sensor orientation is reported using either quaternions or Euler angles over a TTL serial interface at user-customizable rates. The UM6 was designed specifically to be easy to use — an external enclosure protects sensitive electronics, and connectors make it easy to interface with the sensor without making solder connections to the sensor itself.
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The UM6 ultra-miniature orientation sensor—also known as an Attitude and Heading Reference System, or AHRS—from CH Robotics is much more than an IMU. It uses rate gyros, accelerometers, magnetic sensors, and an onboard 32-bit ARM Cortex processor to estimate the absolute sensor orientation 1000 times per second. Sensor orientation is reported using either quaternions or Euler angles over a TTL serial interface at user-customizable rates. A USB-to-serial adapter can be used to connect the IMU to a computer running the free CH Robotics Serial Interface PC application, which allows for easy data visualization, board calibration, and UM6 settings configuration.
The CHR-UM6 was designed specifically to be simple to use: an external enclosure protects sensitive electronics, its small size (1.1"×1.4"×0.5") makes it easier to fit into the end system, and connectors mean no soldering to the sensor itself is required. A polarized four-pin male connector on the side of the UM6 matches an included 7.5" cable and provides the lines necessary to power the board and use the main TTL serial interface. Two 12-pin female connectors on the underside of the UM6 provide access to these same pins along with additional, unused Cortex pins and allow the sensor to be plugged directly into a host system, removing the need to run wires to enable the sensor to communicate. (Note: a version of this sensor is also available without the enclosure or connectors.)
The UM6 can be configured to automatically transmit raw sensor data, processed sensor data, and angle estimates at user configurable rates ranging from 20 Hz to 300 Hz in roughly 1 Hz increments. Alternatively, the UM6 can operate in “silent mode,” where data is transmitted only when specific requests are received over the UART. Regardless of the transmission mode and rate, internal angle estimates are updated at 1000 Hz to improve accuracy.
The UM6 simplifies integration by providing a number of automatic calibration routines, including rate gyro bias calibration, magnetometer hard and soft iron calibration, and accelerometer “zeroing” to compensate for sensor-platform misalignment. All calibration routines are triggered by sending simple commands over the serial interface.
The UM6 comes factory-calibrated to remove soft and hard iron distortions present in the enclosure. When integrated into the end-user system, additional calibration may be necessary to correct other magnetic field distortions. Magnetometer calibration can be performed using the CH Robotics Serial Interface software.
As of firmware revision UM2B, the UM6 has the ability to interface with an external GPS module to provide position, altitude, speed, and course outputs. Any GPS module that communicates using industry-standard NMEA sentences, such as our LS20031 GPS receiver module, can be used with the UM6.
June 1, 2012 Update: We are now shipping CHR-UM6 sensors with the latest firmware version (UM2B), which supports a direct interface with GPS modules; if you have a sensor with the previous firmware version, you can update the firmware using the CH Robotics Serial Interface or with this process described on the CH Robotics forum.
We carry several inertial measurement and orientation sensors. The table below compares their capabilities:
Product Name | Sensors | Estimation | Other | |||||
Gyros (3x) | Accels (3x) | Mag (3x) | Roll | Pitch | Yaw | Quaternion | Enclosure | |
Pololu MinIMU-9 v2 |
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CHR-UM6-LT Orientation Sensor |
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CHR-UM6 Orientation Sensor |
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Graph of all three Euler angles displayed by the CH Robotics Serial Interface connected to a CHR-UM6 orientation sensor. |
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Cable included with the CHR-UM6 orientation sensor. |
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The CHR-UM6 can be used in applications where a compact attitude and heading reference system is needed:
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Pololu USB-to-Serial Adapter |
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USB Cable A to Mini-B 6 ft. |
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66-Channel LS20031 GPS Receiver Module |
Manufacturer BTC Korporacja sp. z o. o. Lwowska 5 05-120 Legionowo Poland sprzedaz@kamami.pl 22 767 36 20
Responsible person BTC Korporacja sp. z o. o. Lwowska 5 05-120 Legionowo Poland sprzedaz@kamami.pl 22 767 36 20
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Black and white e-Paper display with a diagonal of 7.5" and a resolution of 880x528 px. SPI interface. Without PCB. Waveshare 7.5inch HD e-Paper
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Li-Ion battery charger dedicated for Yato 18V systems. It is perfectly matched to batteries with capacities from 2000 mAh to an impressive 6000 mAh, ensuring a full charge in just 1 to 3 hours. Yato YT-82848
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Brushless motor Turnigy L2210-1400 (210 W) (HK18544)
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Inspired by the art of Celtic and Scandinavian medieval craftsmen, as translated through intelligent 21st century engineering, Ugears is proud to introduce the Hurdy-Gurdy—the world’s first (as far as we know!) mechanical model for self-assembly that is also a musical instrument. This extraordinary mechanical model kit is truly one of the gems of our catalogue. This isn\'t just a toy, it\'s a full-fledged musical instrument that you build yourself. The Hurdy-Gurdy has a sound that\'s perfect for folk melodies or dancing, bringing medieval times into the present day. When you purchase the Hurdy-Gurdy you will experience a unique combination: the fun and challenge of building, the appreciation of outstanding engineering and design, and the joy of music. UGears 70030
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