3DM-CV7-AHRS

The 3DM-CV7-AHRS Inertial Measurement Unit (IMU) and Attitude and Heading Reference System (AHRS) offers tactical grade performance in the smallest and lightest OEM package yet. Each sensor is individually calibrated for optimal performance over a wide range of operating conditions.

Our Auto-Adaptive Extended Kalman Filter has been designed from the ground up to deliver consistently reliable measurements in even the most challenging environments. Cutting-edge orientation algorithms, advanced internal time management, and a flexible event triggering system put the 3DM-CV7-AHRS in a league of its own when it comes to price and performance.

3DM-CV7-AHRS

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Sensor

Tactical grade gyro (1.5°/hr bias instability)
Fully calibrated over entire temperature range
Roll/pitch static accuracy: 0.25°, dynamic accuracy: 0.5°
Integrated magnetometer for absolute heading tracking

Operation

Onboard Extended Kalman Filter for attitude estimation
User-selectable accelerometer and gyroscope range
1 KHz output data rate for all channels
Factory supported ROS1 and ROS2 driver
PX4 Autopilot driver for drones, rovers, robots, and more
SensorConnect software for configuration, control, display, and logging
MSCL open source API for easy integration

Package

Anodized aluminum mounting base
Precision alignment features
Compact and low profile
- 38mm x 24mm x 8.6mm
- 8.3 grams
- 18% thinner than the 3DM-CV5 series
- 20% lighter than the 3DM-CV5 series
USB and UART (TTL) interface
Identical footprint to 3DM-CV5 series makes for easy upgrades
–40 to +85°C operating temperature range

3DM-CV7 Series Data Sheet	Data Sheets	English
Micro-D to RS232 Communication and Power Cable	Accessory Guide	English
6212-3010 DEVELOPMENT KIT, RS232, INERTIAL C-SERIES	Accessory Guide	English
6212-3009 DEVELOPMENT KIT, USB, INERTIAL C-SERIES	Accessory Guide	English
Craft Cable with Micro DB9 and Flying Leads	Accessory Guide	English
Micro D-to-USB Communication and Power Cable	Accessory Guide	English
C-Series Connectivity Board Interface Control Document	Mounting Instructions	English

Certificates and Approvals

3DM-CV7 Declaration of Conformity (EU)	Declaration of Conformity	English
3DM-CV7 Declaration of Conformity (UK)	Declaration of Conformity	English
MicroStrain REACH-SVHC Compliance Declaration	Declaration of Conformity	English

3DM-CV7 CAD Model	CAD Step Files
MicroStrain 7-Series Inertial Sensor Firmware	Firmware

3DM-CV7-AHRS
Performance Grade	Tactical Grade
Features	Accelerometer, Gyroscope, Magnetometer
Random Walk	Accel: 20 µg/√Hz, Gyro: 0.3 °/√hr
Bias Instability (Gyroscope)	1.5 °/hr
Bias Instability (Accelerometer)	18 μg
Hysteresis	Accel bias: 0.6 mg, Accel gain: 125 PPM, Gyro bias: 0.04 °/s, Gyro gain: 1000 PPM
Communication Port Type	Samtec FTSH series
Communication Interface	TTL serial, USB
Update Rate	IMU: 1000 Hz, EKF: 1000 Hz
Inputs/Outputs	4xGPIO
Weight	8.3 g
Weight	0.293 oz
Size	38 mm x 24 mm x 8.6 mm
Size	1.50 in x 0.94 in x 0.34 in
Power Consumption	0.23 W
Input Voltage	3.2 V to 5.2 V
Minimum Operating Temperature	-40 °C
Maximum Operating Temperature	85 °C
Minimum Operating Temperature	-40 °F
Maximum Operating Temperature	185 °F
MTBF	2002026 h
Sensing Range (Accelerometer)	4 g
Sensing Range (Gyroscope)	250 °/s
Sensing Range (Magnetometer)	8 Gauss
Sensing Range (Pressure)	1260 mbar
Accuracy	Roll/Pitch (dynamic): 0.5 °, Roll/Pitch (static): 0.25 °, Heading (static): 0.5 °, Heading (dynamic): 2 °
Ingress Protection Rating	Not Rated
Housing Material	Aluminum
Software	MSCL, ROS, SensorConnect
Mounting Style	Embeddable, Screw Down, Precision Alignment

Product Code	Description
6212-3006	OEM CABLE KIT FOR INERTIAL SENSORS
6212-3009	C-Series Development Kit, USB
6212-3010	C-Series Development Kit, RS232

Everything you need to get started

Access your sensor's comprehensive online user manual. Find detailed setup instructions, calibration procedures, troubleshooting guides, and technical specifications all in one convenient location.

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Software

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InertialConnect
SensorConnect
SensorCloud
MSCL and MIP SDK

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InertialConnect Screenshot - GNSS Statuses

InertialConnect is the preferred software solution for MicroStrain inertial sensors. With InertialConnect, you can easily configure your sensors, adjust parameters, upgrade firmware, and deploy preconfigured parameter files. You can also verify sensor outputs with intuitive visualizations, including times eries data, position data, and statuses.

InertialConnect is compatible with both PC desktop and Linux operating systems, making it your go-to solution for precision and efficiency in inertial sensor management.

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SensorConnect is the next generation in desktop sensing software.

From configuration of nodes and starting networks, to collecting and analyzing data in real-time, SensorConnect provides a modern, powerful experience with our Wireless, Inertial, and Displacement products.

Using our intelligent data collection and graphing algorithms, you are able to visualize massive amounts of data instantly, and then zoom in on points of interest just as fast.

Built in MathEngine functionality allows for both real-time and post-processed math, such as generating FFTs, averages, RMS, etc.

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SensorCloud is a unique sensor data storage, visualization, and remote management platform that leverages powerful Cloud computing technologies to provide excellent data scalability, rapid visualization, and user programmable analysis.

MicroStrain sensors can instantly upload their data to SensorCloud via an ethernet-connected WSDA-2000. Once uploaded, your data is securely stored in the Cloud and can be accessed from anywhere, or downloaded for offline use.

Configurable alerts can be set to help notify you of real-time event in your data.

MathEngine allows you to perform analytics on your data, all in the Cloud. Pre-built functions are available for ease of use, while IPython Notebooks allow advanced users to write custom scripts to be run on their data once, or on a schedule.

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The MicroStrain Communication Library (MSCL) is our open-sourced API that simplifies writing code to interact with our sensors. MIP SDK is a lightweight C/C++ library for interacting with MicroStrain G and C-series products via baremetal and resource constrained microcontrollers.

Both APIs are readily available and fully-documented on GitHub, featuring valuable tools such as full documentation, example code, and a quick start guide.

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Built for ROS

Robot Operating System (ROS) is an open-source, meta-operating system for your robot. It provides the services you would expect from an operating system, including hardware abstraction, low-level device control, implementation of commonly-used functionality, message-passing between processes, and package management. ROS can be used in building and simulating robotics applications, as well as unmanned ground vehicles and simultaneous localization and mapping (SLAM). MicroStrain has an open source License free (MIT License) series of drivers specifically designed and tested for ROS.

Integrated PX4 Support

PX4 is an open source flight control software for drones and other unmanned vehicles. The project provides a flexible set of tools for drone developers to share technologies to create tailored solutions for drone applications. PX4 provides a standard to deliver drone hardware support and software stack, allowing an ecosystem to build and maintain hardware and software in a scalable way. PX4 is fully supported on MicroStrain’s 3DM-CV7 family of inertial sensors.