Electronic compass GDM series

3Dtilt-compensated

Product Introduction
The GDM350 / 360 is a high-performance 3D dynamic electronic compass with a built-in 9-axis inertial measurement unit (IMU), integrating a three-axis accelerometer, a three-axis gyroscope, and a three-axis magnetometer. By combining the high dynamic angle measurement capability of the gyroscope with the high stability attitude detection characteristics of the accelerometer, and using advanced dynamic inertial navigation algorithms, it can calculate pitch and roll angles in real time under complex motion conditions. This product employs hard and soft magnetic intelligent calibration technology, which can effectively suppress environmental magnetic field interference and improve the measurement accuracy of geomagnetic azimuth. The central processing unit calculates heading data in real time and performs full-range magnetic azimuth compensation based on dynamic pitch and roll angles, maintaining reliable heading output even under large tilt angles of ±85°.

The electronic compass is equipped with a high-performance DSP processor and supports standard communication interfaces such as RS232/RS485/TTL. Other communication protocols can also be customized according to requirements. Its compact design combines low power consumption characteristics and is suitable for high-precision measurement and integrated control scenarios such as ship navigation, antenna stability control, and model systems. It performs stably under strong vibration and harsh environmental conditions.

Key features

• Tilt resolution: 0.1°
• Static tilt accuracy: <0.2°
• Dynamic accuracy: <0.5°

Performance Parameters (table)
GDM350/360 | Parameter Indicators
Compass heading parameters: Heading accuracy: 0.8°
Compass heading parameters: Resolution: 0.1°
Pitch measurement range: ±90°
Roll measurement range: ±180°
Tilt accuracy: Static 0.2° | Dynamic 0.5°
Tilt resolution: 0.1°
Tilt compensation angle range: Roll ±180° | Pitch <85°
Gyroscope: Range 500°/s
Accelerometer: Range 4g
Calibration: Hard iron calibration: Yes | Soft iron calibration: Yes | Magnetic field interference calibration method: One full rotation (2D calibration)
Physical characteristics: Dimensions Shell: L55×W37×H24mm | PCBA: L33×W27×H9.7mm
Interface connector: RS232 / RS485 / TTL (Aerospace connector or 4PIN 30cm terminal wire for board connection)
Interface characteristics: Startup delay <50ms | Output rate 5~100Hz (configurable) | Baud rate 4800 to 115200 baud | Output format: Binary high-performance protocol
Power supply: (Default) DC +5V | (Custom) DC 9~36V | Current (MAX) 45mA | Ideal mode 35mA | Sleep mode: TBD
Environment: Operating range -40℃~+85℃ | Storage temperature -40℃~+85℃ | Vibration resistance 2500g
Electromagnetic compatibility: Complies with EN61000 and GBT17626
MTBF: ≥98000 hours
Insulation resistance: ≥100 megohms
Shock resistance: 100g@11ms, triaxial (half-sine wave)
Vibration resistance: 10grms/10~1000Hz
Weight: PCBA ≤25g | Shell ≤135g (excluding cable)

Caractéristiques / spécifications techniques

• Model family: GDM series (GDM350 / GDM360)
• Built-in sensors: 3-axis accelerometer, 3-axis gyroscope, 3-axis magnetometer (9-axis IMU)
• Heading accuracy: 0.8°
• Heading resolution: 0.1°
• Pitch measurement range: ±90°
• Roll measurement range: ±180°
• Tilt accuracy: Static 0.2°, Dynamic 0.5°
• Tilt resolution: 0.1°
• Tilt compensation: Roll ±180°, Pitch <85°
• Gyroscope range: 500°/s
• Accelerometer range: 4g
• Calibration: Hard iron and soft iron calibration supported; magnetic interference calibration via one full rotation (2D calibration)
• Dimensions: Shell L55×W37×H24mm; PCBA L33×W27×H9.7mm
• Interfaces: RS232 / RS485 / TTL (aerospace connector option); board connection via 4PIN 30cm terminal wire
• Startup delay: <50ms
• Output rate: 5~100Hz (configurable)
• Baud rate: 4800–115200
• Output format: Binary high-performance protocol
• Supply voltage: Default DC +5V (custom DC 9~36V available)
• Current consumption: Max 45mA; typical 35mA
• Operating temperature: -40℃ to +85℃
• Storage temperature: -40℃ to +85℃
• Vibration & shock: Vibration resistance 10grms/10~1000Hz; shock resistance 100g@11ms triaxial; additional spec 2500g noted
• EMC: Complies with EN61000 and GBT17626
• MTBF: ≥98,000 hours
• Insulation resistance: ≥100 megohms
• Weight: PCBA ≤25g; Shell ≤135g (excluding cable)