IMU Sensor Modules

IMU Sensor Modules for Sports Science, Rehabilitation & OEM Integration

Validated configurations. Predictable performance. No black boxes.

Key Capabilities at a Glance

9-DoF IMU
3-axis accelerometer (±2/±4/±8/±16 g)
3-axis gyroscope (±125/±250/±500/±1000/±2000 dps)
3-axis magnetometer (±50 G)

Sampling rates
1–800 samples/s per sensor (mode-dependent)

Time synchronization
Typical ~60 µs, max <150 µs across sensor networkExtendable to external systems (e.g. EMG, force plates)

Latency (wireless)
7.5 ms at the sensor; 15 ms through the QSense wireless BLE dongle. The achievable latency depends on the wireless BLE implementation, the operating system (Windows, Android, iOS) and the application

Wireless
BLE 5.x, up to 2 Mbps, dedicated USB dongle for robust multi-sensor capture

Orientation accuracy (quaternion mode)
Static error <1°, drift <0.5° (with internal compensation)

Battery
140 mAh Li-Po≈12 h (time-sync mode), up to ≈20 h (low-latency mode)

Form factor
38.9 × 24.3 × 10.2 mm, 8 g, IP67Single button + RGB LEDs

Operating conditions
Indoor/outdoor, 5–40 °C, RH ≤85%

No mandatory cloud: capture and store locally, stream over BLE, or pipe data via the dongle to your own software stack. Perfect for privacy-sensitive research and OEM products.

---

Throughput Guidance (Per Dongle)

To ensure reliable performance, use the following validated configurations:

Sensors	Max sample rate per sensor	With two dongles
1	up to 800 Hz	2 sensors
1–2	up to 400 Hz	up to 4 sensors
3–6	up to 200 Hz	up to 12 sensors
7–12	up to 100 Hz	up to 18 sensors

These envelopes provide predictable latency and stable streaming in real-world conditions.

Designed for Sports & Rehabilitation Research

QSense is widely used in:

Gait & symmetry analysis
High-precision timing ensures left/right comparisons remain valid across trials.

Technique coaching
Low latency enables real-time feedback for cycling, running, balance training, ACL rehab, and return-to-play protocols.

Workload & coordination studies
Multi-segment synchronization allows robust phase analysis and coordination metrics.

Open analytics workflows
Ingest CSV/quaternion streams into MATLAB, Python, or R. Compute joint angles, cadence, sway, time-to-stabilization, custom metrics.

Typical Setups

Two-Foot Cycling Assessment

• 2 sensors @ 200 Hz each
• Low-latency streaming
• Quaternions + linear acceleration
• Pedal phase & pronation metrics

Six-Sensor Lower-Body Gait Analysis

• 6 sensors @ 200 Hz with time sync
• Raw IMU + fused orientation
• Spatiotemporal parameters & event detection

Twelve-Sensor Full-Body Pilot

• 12 sensors @ 100 Hz via one dongle
• External EMG trigger synchronization
• CSV export for offline modeling

Data Output Modes – Choose What Your Pipeline Needs

QSense lets you configure output per sensor:

Raw IMU
Accelerometer, gyroscope, magnetometer – full control over filtering and modeling.

Fused signals
Gravity-compensated linear acceleration, ready for quick analytics.

Quaternions (6-DoF / 9-DoF Madgwick)
Stable 3D orientation, no gimbal lock, low bandwidth, ideal for real-time visualization.

All modes are configurable from 1–800 Hz. The PC app records directly to CSV, and SDKs expose the same packets for live processing. No cloud, no lock-in.

Fast Start for Labs & Teams

QSense PC Application (Windows)
Scan & connect sensors, set sample rates and output modes, live graphs, recording, time sync control. Typically up and running in minutes.

Mobile demo apps (iOS / Android)
Quick field validation and pilot testing.

Example code
Ready-to-run samples for connecting, streaming, logging, quaternion parsing, and CSV export.

Developer Stack (OEM)

• APIs
  • QSenseDotNet DLL – sensor core interface
  • QSenseDotNet.Dongle DLL – wireless dongle & serial interface
• Targets
  • Windows 10+, Android 8+, iOS 16+
  • .NET 5+, Unity 2021.2+
• Data
  • Raw, fused, or quaternion
  • 1–800 Hz configurable per sensor

For full API documentation and integration guides, see the Developers & API section.

Custom Solutions & Modifications

Building a product or running a specialized study? We offer OEM customization across:

Hardware
Alternate sensor ranges, PCB adaptations, antenna tuning, sealed enclosures, custom connectors.

Firmware
Sampling profiles, on-device filtering, custom packets, compression, security features.

Mechanical integration
Custom mounts, textile integration, medical-grade attachments.

System integration
Time sync extensions to EMG, force plates, cameras, triggers, and external systems.

Our engineering team at 2M Engineering can also deliver algorithms (event detection, gait metrics), test fixtures, and manufacturing support.

Engagements are scoped with clear NRE, modest MOQs, and optional geography/application exclusivity.

Get Started

1. Download – User manual, PC app, SDKs & examples
2. Evaluate – Request a demo kit (sensors, dongle, straps, charger)
3. Integrate – Talk to our engineers about APIs, timing, and OEM licensing

Have a specific study or product in mind?

Tell us your sensor count, sample rates, and target platform – we’ll propose a validated configuration within 24 hours.

FAQs