Technical Specifications

This document provides the complete technical specifications of the Alius Motion Capture System, including sensor parameters, communication performance, battery life, and other detailed information.

Sensor Specifications

IMU Sensors

  • Model: ICM-45686 or LSM6DSV
  • Type: 6-axis Inertial Measurement Unit (3-axis accelerometer + 3-axis gyroscope)
  • Accelerometer Range: ±2g / ±4g / ±8g / ±16g (configurable)
  • Gyroscope Range: ±125dps / ±250dps / ±500dps / ±1000dps / ±2000dps (configurable)
  • Accelerometer Noise Density: 120 μg/√Hz
  • Gyroscope Noise Density: 10 mdps/√Hz
  • Data Output Rate: Up to 1000 Hz
  • Sensor Fusion: Built-in sensor fusion algorithm

Sensor Accuracy

  • Attitude Angle Accuracy: < 1° (static), < 2° (dynamic)
  • Heading Drift: < 1°/minute (without magnetometer assistance)
  • Tilt Angle Error: < 0.5°

Tracking Performance

6-DOF Tracking

  • Position Tracking: Through forward kinematics solving
  • Orientation Tracking: Quaternion output, globally continuous without singularities
  • Tracking Frequency: 60 Hz / 90 Hz / 120 Hz (configurable)
  • Latency: End-to-end < 20ms (from sensor to application)

Configurable Tracking Points

The system supports flexible tracking point configurations:

  • 5 points: Head + hands + feet (basic configuration)
  • 6 points: 5 points + pelvis
  • 8 points: 6 points + elbows
  • 10 points: 8 points + knees
  • 16 points: All major body joints (full configuration)

Wireless Communication

WiFi Specifications

  • Standard: IEEE 802.11 b/g/n
  • Frequency: 2.4 GHz
  • Transmission Power: Up to 20 dBm
  • Receiver Sensitivity: -98 dBm
  • Antenna: Built-in PCB antenna
  • Coverage Range: Approximately 30 meters in open space

Data Transmission

  • Transmission Protocol: Custom UDP protocol with packet loss retransmission support
  • Data Format: Binary compressed format
  • Bandwidth Usage: Approximately 500 Kbps (16-point configuration)
  • Multi-device Support: Single receiver base station supports up to 16 trackers

Battery and Runtime

Battery Specifications

  • Battery Type: Lithium Polymer Battery (LiPo)
  • Capacity: 500 mAh
  • Voltage: 3.7V
  • Charging Current: 500 mA (standard), 1A (fast)
  • Charging Time: Approximately 1.5-2 hours (from 0% to 100%)

Battery Life

  • Typical Use: 8-12 hours
  • Standby Time: Approximately 30 days
  • Low Battery Warning: Indicator flashes when battery drops below 10%
  • Auto Shutdown: Automatically saves data and shuts down before battery depletion

Physical Specifications

Tracker Dimensions and Weight

  • Dimensions: 45mm × 35mm × 15mm
  • Weight: Approximately 25g (including battery and casing)
  • Casing Material: ABS + PC composite material
  • Color: Black (standard), customizable
  • Protection Rating: IP30 (dust protection, not waterproof)

Receiver Base Station

  • Dimensions: 100mm × 80mm × 25mm
  • Weight: Approximately 80g
  • Interface: USB-C (data transmission and power supply)
  • Indicators: Power indicator, connection status light

Software and Compatibility

Supported Platforms

  • Operating Systems: Windows 10/11, macOS 12+, Linux (Ubuntu 20.04+)
  • VR Platforms: SteamVR, OpenXR
  • Application Compatibility: VRChat, Blender, Unity, Unreal Engine

Data Output Formats

  • Real-time Streaming: WebSocket, UDP, TCP
  • File Formats: CSV, BVH, FBX
  • Coordinate Systems: Supports multiple coordinate system conversions (Y-up, Z-up, etc.)

Environmental Requirements

Operating Conditions

  • Temperature: 0°C to 40°C
  • Humidity: 10% to 80% RH (non-condensing)
  • Altitude: Up to 2000 meters

Storage Conditions

  • Temperature: -20°C to 60°C
  • Humidity: 5% to 90% RH (non-condensing)

Certifications and Compliance

  • FCC: Part 15 Class B
  • CE: RED Directive 2014/53/EU
  • RoHS: 2011/65/EU
  • WEEE: 2012/19/EU

Package Contents

Depending on the configuration, the package may include:

  • Alius wireless trackers × N (N = 5/6/8/10/16)
  • WiFi receiver base station × 1
  • USB-C cable × 1
  • Tracker straps × N
  • Quick start guide × 1
  • Warranty card × 1

Ordering Information

Please provide your configuration requirements, and we will recommend the most suitable solution for you. For customized services (such as special colors, logo printing, etc.), please contact our sales team.