I2M Motion Tracking Product Line

Our I2M (IMUs to Motion) family of products provides a combination of leading edge IMU (inertial sensors) technology with a powerfully but easy to use motion analysis software solution HM-Analyzer (HM = Human Motion).

The IMUs each contain 8GB of storage allowing them to be used offline or real-time with the data being backed up while transmitting also to a PC. All sensors are synchronized when in wireless mode. Each IMU contains an accelerometer selectable to 16g.

Our solutions include a variety of sensor configurations with our application software. Our kits and options include docking stations to charge the IMUs and download data as well as the hardware to control the wireless transmission of the sensors.

A variety of mounting accessories are available and several are included in the kit configurations.

Applications

Human motion applications include biomechanics research. gait analysis, ergonomics. neurology, sports, and more.

Other applications include vibration analysis, inertial guidance, virtual reality, robotics, gaming industry, training, and more.

HM-Analyzer (Human Motion Analyzer)

Our HM-Analyzer maps from one to 15 inertial sensors to various segments of the body (such as trunk, pelvis, arms, etc.) in order to obtain joint angles according to ISB - International Society of Biomechanics (ISB angles are also anatomical angles) or according to AAOS. The software and system are totally scalable allowing you to use any number of sensors as required. The skeleton which is used for visualization can be adjusted according to the subject's anthropometry.



The software takes care of joint definitions and conversions. The user simply needs to identify the segment that is mapped to the specified sensor.

The application synchronizes the data automatically. The user can then perform various analyses within HM-Analyzer or export data.

The calibration procedure consists of the user selecting either the T-pose or I-pose (posture) and clicking "Calibrate" or using the auto-calibration option.

Animation allows you to replay a recording. You can zoom in and out on the graphs using the mouse wheel.

Recording duration time can be set manually or automatically by specifying the start and end recording time.

HM-Analyzer includes synchronization capability (requires optional hardware Synch kit) with the Biometrics DataLOG (as slave or master) with EMG, force plates as well as other sensors and accessories. As well, there is an option to synch with a webcam.

DATS (Data Analysis Tool Set) Module

The DATS (Data Analysis Tool Set) module is included and performs a variety of joint angle analysis, filtering and data export. The DATS module provides a graphical user interface (GUI) to perform data analysis. The analysis can be done with streaming (real-time) data or with data that was previously recorded.

The interface uses a graph layout to create various analyses. Tools are available to easily connect the graphical blocks. Data processing block layouts can be saved for reuse.

The DATS module includes various filtering options, biomechanical tools to calculate joint angles (according to the ISB or AAOS) as well as various signal processing tools.

DATS also includes a variety of data filtering options that can be applied which include Butterworth, Chebyshev (1 & 2) and Bessel.

Graphical displays can include raw data such as acceleration or gyro data or computed joint angles according to the AAOS or ISB.

Saved analysis can be saved for reuse or future modifications.

Ergo-Analyzer Module

Ergo-Analyzer is an optional HM-Analyzer module that includes the RULA (Rapid Upper Limb Assessment) and OWAS (Ovako Working Posture Analysis System) ergonomic methods.

RULA Analysis

RULA (rapid upper limb assessment) is a survey method developed for use in ergonomics investigations of workplaces where work-related upper limb disorders are reported. The RULA method can be used to analyze right and/or left upper limbs, neck, trunk and legs postures at selected instants or continuously at a predefined frequency by the users.

The results of the RULA analysis can be saved as .odt or .html files.


RULA Screen Examples



RULA Report Excerpt



RULA Summary Results Screen

The Summary Results screen displays the Left and Right sides results as well as those for the Neck, Trunk and Legs as well as their RULA scores. The forces and weights applied on each chain (right side, left side and Neck-Trunk chain) are also displayed in combo boxes. The RULA grand scores are displayed as colored bars with values.

OWAS Analysis

OWAS (Ovaka Working Posture Assessment System) was developed in Finland in a steel industry company, Ovako Oy, in 1973 to describe the workload in the overhauling of iron smelting ovens (Karhu 1977). It identifies the most common work postures for the back (4 postures), arms (3 postures) and legs (7 postures), and weight of the load handled (3 categories). Whole body posture is described by these body parts with a four digit-code. These 252 postures have been classified to four action categories indicating needs for ergonomic changes. The observations are made as "snapshots" and sampling has usually been with constant time intervals.

The OWAS method can also be used to analyze a global task through its duration by setting the percentages of the postures held by the subject over the task duration and for every body part.

The results of the OWAS analysis can be saved as .odt or .html files.


OWAS Screen Examples


The obtained results are categorized according to their severity (moderate, severe and extreme). The users can include all results and/or each category of results. Based on the number of critical events contained in the analysis, a number of reports will be generated.


OWAS Report Excerpt


Main Features

Key Hardware Features

IMU (SXT2) Specifications

  Accelerometer 1 Accelerometer 2 Gyroscope Magnetometer Barometer
Axes 3 3 3 3 3
Range ± 16g ± 200g ± 2000 °/s ± 8 Gauss 300-1100 hPa
Noise Density 120 μg/√Hz 5 mg/√Hz 0.025 °/s/√Hz 2 mGauss/√Hz 1.3 Pa
Sample Rate < 3.2 kHz ≤ 2.0 kHz ≤ 10 kHz ≤ 75 kHz ≤ 182 kHz
Output Rate 20-200 Hz 20-200 Hz 20-200 Hz 20-200 Hz 20-200 Hz
Bandwidth 50 Hz 50 Hz 50 Hz 32.5 Hz 75 Hz
Resolution 17.5 bit 14 bit 16 bit 12 bit 20 bit

Device Characteristics

Mounting Accessories

There are a number of options for securing the sensors on subjects using a selection of latex-free straps.

  1. Multi-length straps are suitable for universal use including hand, wrist, arm, head, thigh, shank, ankle, and foot.
  2. Sternum strap
  3. Lumbar strap

Minimum System Requirements

HM-Analyzer is a trademark of NexGen Ergonomics Inc.