SOC Robotics DOF10W Sensor

By: Soc Machines  09-12-2011
Keywords: Data Logger

Overview
The DOF10W is a sophisticated sensor platform with ten Degrees Of Freedom (DOF).  The DOF10W combines a 3-Axis Accelerometer (ADXL345), 3-Axis Rate Gyro (L3G4200D), 3-Axis Magnetometer (HMC5883) and a Barometer (BMP085) on a single PCB that can attach to a Wasp Data Logger.  All four MEMs sensors are digital with either an SPI or I2C interface.

The Accelerometer is capable of 4mG resolution over a +-16G range.   The Rate Gyro has three ranges - 250, 500 and 2000 deg/sec with a low range sensitivity of 17mdps.  The Magnetometer has eight ranges with a nominal resolution of 10mGauss.  The Barometer has an absolution accuracy of 8meters and a resolution of 80cm.

Truly a unique combination of sensors.  Source code is provided that configures all the sensors and allows the creation of a 10 DOF data logger when combined with either a Wasp, WaspARM or WaspX embedded processor.

Features
    o  10 Sensors integrated on one PCB
o  3-Axis Accelerometer ADXL345
o  3-Axis Rate Gyro L3G4200D
o  3-Axis Magnetometer HMC5883
o  Barometer BMP085 with 8m accuracy and 0.8m resolution
o  All digital sensors
o  0R resistors connect INT outputs to control processor
o  Example application included for rapid application development
o  1.8-3.6VDC power input 
o  Extremely Small form factor (1.50x1.15 in)

Description
The DOF10W is an extremely compact embedded IMU sensor platform for mobile data acquisition, instrumentation and remote monitoring applications.  The DOF10W is an all digital implements with no requirement for AD interfacing.   

3-Axis Accelerometer
The 3-Axis accelerometer is an Analog Devices ADXL345.  The ADXL345 has four programmable acceleration ranges- 2G, 4G, 8G and 16G set by the ATmega644.   The ADXL345 operates from 2.2 to 3.6Vdrawing 140uA so the Wasp should not be powered higher than 3.6V when the accelerometer is installed.  The accelerometer has a sensitivity of 4mG over the full 16G range, a bandwidth of 3500Hz (XY)  150Hz (Z), non-linearity less than 1% and a cross-axis sensitivity less than 1%.

The accelerometer is oriented with the X+ on the long axis of the PCB toward Port A connector J1, Y+ on the short axis of the PCB toward Port B connector J2 and Z+ pointing up out of the board.

                           

3-Axis Rate Gyro
The 3-Axis Rate Gyro is an STMicroelectronics L3G4200D.  The L3G4200D has three programmable gyro ranges- 250, 500 and 200dps set by the ATmega644.   The L3G4200D operates from 2.2 to 3.6Vdrawing 6mA so the Wasp should not be powered higher than 3.6V when the accelerometer is installed.  The Gyro has a sensitivity of 17mdps (250dps setting),  a bandwidth of 350Hz (XY)  150Hz (Z), non-linearity less than 1% and a cross-axis sensitivity less than 5%.

                                       

3-Axis Magnetometer
The 3-Axis Magnetometer is a Honeywell HMC5883.  The HMC5883 has eight programmable gauss ranges- 0.88G, 1.3G, 4G and 8.1G set by the ATmega644.   The HMC5883 operates from 2.2 to 3.6Vdrawing 100uA so the Wasp should not be powered higher than 3.6V when the accelerometer is installed.  The Magnetometer has a sensitivity of 2mG (1.3g setting),  a bandwidth of 350Hz (XY)  150Hz (Z), non-linearity less than 1% and a cross-axis sensitivity less than 5%.

                         

Software Tools

Related Products
The following products can be used with the DOF10W:

    Wasp           AVR Embedded Processor Data Logger
WaspARM   ARM7 version of the Wasp
USB10          USB 2.0 Peripheral based on the AT90USB162
SmartLCD   4x12 Monochrome LCD with onboard ATmega168 and optional 3-axis Accelerometer

Keywords: Data Logger

Other products and services from Soc Machines

09-12-2011

SOC Robotics Products

The family includes low cost IP controllers for embedded web server automation to high performance DSP engines optimized for real time image/video processing running uCLinux. SOC Robotics offers a family of high performance Embedded RISC/DSP engines for Image and Video processing optimized for real time vision processing, monitoring and control.


09-12-2011

SOC Robotics MC433 Stepper Motor Controller

A low current DC relay array capable of handling 24VDC at 2A or 120VAC at 0.4A, a high current relay array capable of handling 30VDC at 4A or 120VAC at 2A and a hybrid MOSFET controller that can be configured to control three small stepper motors or operate as 12 independent 2A 30V switches.


09-12-2011

SOC Robotics IMU6410 Sensor Platform

Overview The IMU6410 is a sophisticated MEMs sensor Inertial Measurement Unit platform with ten Degrees Of Freedom, onboard AVR processor, real time clock, external serial flash and USB interface. The accelerometer has a sensitivity of 4mG over the full 16G range, a bandwidth of 3500Hz 150Hz, non-linearity less than 1% and a cross-axis sensitivity less than 1%.