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Xsens MTi Series User Manual

Xsens MTi Series
53 pages
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MTi and MTx User Manual
and Technical Documentation
Document MT0100P
Revision E, December 2
nd
2005
Xsens Technologies B.V.
Capitool 50 phone +31-(0)53-4836444
P.O. Box 545 fax +31-(0)53-4836445
7500 AM Enschede e-mail support@xsens.com
The Netherlands internet www.xsens.com

Table of Contents

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Xsens MTi Series Specifications

General IconGeneral
SeriesMTi
TypeMotion Tracker
CategoryInertial Measurement Units (IMU)
VariantsMTi-1, MTi-7, MTi-10
ApplicationsRobotics, Autonomous vehicles, Drones, Industrial automation
InterfacesUART, USB, I2C, SPI
ProtocolsNMEA
Operating Temperature-40°C to +85°C
OutputAcceleration, Angular Velocity, Magnetic Field
SensorsGyroscope, Accelerometer, Magnetometer
Update RateUp to 1 kHz
AccuracyVaries by model and conditions
Dimensions12.1 x 12.1 x 2.55 mm (MTi-1 series)
WeightVaries by model
Roll/Pitch Accuracy0.2° RMS

Summary

Introduction to MTi and MTx Systems

Product Description

Overview of the MTi and MTx miniature inertial measurement units and their features.

MTi and MTx Development Kit

Details the contents of the MTi and MTx development kit, including hardware and software components.

Typical User Scenarios

Illustrates common ways to use the MTi and MTx with different software and communication approaches.

Sensor Fusion Algorithm

Explains the sensor fusion algorithm used to calculate absolute orientation from sensor data.

Output Specification and Data Formats

Coordinate Systems

Defines the body-fixed and earth-fixed coordinate systems used for sensor readings and orientation output.

Orientation Performance Specification

Details the typical performance characteristics of the MTi/MTx orientation output, including accuracy and resolution.

Orientation Output Modes

Describes the different parameterizations for orientation output: Quaternions, Euler angles, and Rotation Matrix.

Calibrated Data Performance Specification

Specifies the performance metrics for calibrated rate of turn, acceleration, and magnetic field data.

Calibrated Data Output Mode

Explains the physical sensor model and how calibrated inertial and magnetic data are outputted.

Coordinate System Resets

Details procedures for resetting output or reference coordinate systems like Heading, Global, Object, and Alignment resets.

Timestamp Output

Describes the timestamp output functionality and its configuration options.

Analog Outputs

Explains the analog output signals for Euler angles, their conversion, and accuracy.

Basic Communication Protocols

Communication Introduction

Introduces low-level serial communication using RS-232/422 and the Xbus protocol.

Device States

Outlines the two main states of the MTi/MTx: Config State and Measurement State.

Message Structure and Usage

Details the structure of Xbus messages, fields, and how messages are used for communication.

Communication Timing

Analyzes the delays and latencies involved in data acquisition and transmission.

Internal Clock Accuracy

Specifies the accuracy and jitter characteristics of the internal clock.

Serial Connection Settings

Defines the default serial communication settings for RS-232 and RS-422 interfaces.

Physical Specifications and Interfaces

Sensor Overview

Provides a brief overview of the accelerometer, rate of turn, and magnetometer sensors used.

Physical Properties Overview

Summarizes key physical properties like interface, voltage, power consumption, and dimensions.

Power Supply

Details the nominal and operating voltage ranges and power consumption of the MTi/MTx.

Physical Interface Specifications

Covers USB-serial cables and pin/wire color definitions for various MTi/MTx models and interfaces.

Housing Mechanical Specifications

Describes the mechanical construction and materials of the MTi and MTx housings.

Operating Guidelines and Placement

Normal Operating Procedure

Outlines the standard steps for powering on, operating, and powering off the device.

Placement Considerations

Provides guidance on optimal placement of the device to minimize errors from transient accelerations, vibrations, and magnetic fields.

Important Notices and Support

Environmental Operating Conditions

Specifies recommended operating temperature, humidity, and warnings against magnetic fields.

Absolute Maximum Ratings

Lists critical stress limits (shock, voltage, temperature) that must not be exceeded to prevent damage.

Maintenance

Information on maintenance requirements and when to contact support.

Warranty and Liability

Outlines the product warranty terms, limitations, and Xsens' liability.

Customer Support

Provides contact information for Xsens customer support and details needed for inquiries.

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