Smart Logger 10DOF IMU

Concept

The Smart-Logger is a lightweight, wireless (optional), low-power data-logging with a Real-Time Clock (RTC), integrated 6DoF inertial sensors, a 3-axis magnetometer, thermometer, high-sensitivity barometer, and an auxiliary analog input. It is suitable for both academic research and home use. With a power consumption low enough to last up to a month on a 240mAh LiPo battery, its actual operating time varies based on sensor activity, sampling rates, and data compression settings. The Smart-Logger can function as a data logger or as an real-tome Inertial Measurement Unit (IMU).

Storage Options

• 2 MB FLASH

• 4 MB FLASH

• 8 MB FLASH

Communication

Smart-Logger uses Bluetooth for communication (standard COM profile); an optional BLE version is available.

The Smart-Logger supports:

• • Real-time telemetry transmission

  • Log downloads

  • Configuration of sampling rates, data compression, active sensors, and power settings

  • Firmware updates

Communication Range

• Up to 25m in open areas with a laptop. Range may vary.

• Wired version is also available (UART-TTL or UART-USB).

Measurement Modes

• Continuous: Configurable sampling rate of 0.05 to 20 Hz

• On-Change Detect: Activates only upon sensor change. This saves power and log memory

Data Compression Formats

• Raw 16-bit (uncompressed)

• Raw 8-bit (Lossy compression by linear down scaling)

• MuLaw 16-bit to 8-bit (Lossy compression by logarithmic down scaling)

Operating Modes

1. OFF (Standby)

2. Real-time Transmission

3. Logging

4. Log Downloading

5. Real-Time Transmission + Logging

6. Log Downloading + Logging

7. Real-Time Transmission + Logging + Log Download

Specifications

• Sensor options: Up to 3-axis accelerometers, 3-axis gyros, temperature, barometer, and 3-axis magnetometer.

• Auxiliary Analog Input: 0 to 3V, 10-bit resolution (~3mV).

• Sampling Period: 30 seconds to 50 milliseconds with 5ms resolution.

• Maximum Sampling Rate:

  • All sensors: 9 Hz

  • Single sensor: 20 Hz

• Dimensions: 30 x 25 x 14 mm

• Weight: 

  • 10DoF version: 8g (without battery)

  • 3DoF version: 5.5g

• Battery: Options of 240mAh (6g) and 350mAh (9.5g).

• Battery life: Over one month (with 3 accelerometers at 1 Hz sampling).

• Power consumption: 540 µW for typical settings.

Auxiliary Analog Input

The Smart-Logger includes a single analog input capable of measuring internal battery voltage when not connected to a source. It has a ground and 3.3V/100 mA output, suitable for various sensors such as:

• Pitot Tube (air velocity)

• Load Cell (weight/force)

• Remote temperature sensors

• Light intensity sensors

• Motion sensors

• Current/Voltage sensors

• Sound intensity sensors

Firmware Specifications

The Smart-Logger operates over the GS-Real-Time-Operating-System with the below key features:

1. Designed for optimal performance across Microchip's PIC series (8-bit, 16-bit, and 32-bit).

2. GS-Device-Control-Network Protocols Stack (DCN): Enables point-to-point or half-duplex communication.

3. GS-System-Monitor-Application (SMA): Provides remote access and monitoring.

4. GS-Virtual-RPN-Machine (VRM): A virtual processor for executing user-defined scripts or control loops.

User Application

Smart-Logger offers a user-friendly Python-based GUI for operation and configuration.

GUI

POWER CONSUMPTION

MEMORY STORAGE