DDM350B/DDM360B Dynamic Electronic Compass with 9-Axis IMU Attitude and Heading Reference Sensor for GPS Integrated Navigation
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The DDM350B/DDM360B is a three-dimensional dynamic electronic compass that integrates a 9-axis inertial measurement unit, including a three-axis accelerometer, three-axis gyroscope, and three-axis fluxgate. Utilizing the high dynamic angle characteristics of the gyroscope and the highly stable attitude characteristics of the accelerometer, the system obtains pitch and roll angles that follow complex attitude changes through dynamic inertial navigation algorithms.
The geomagnetic azimuth angle employs hard magnetic and soft magnetic calibration algorithms, enabling the compass to eliminate magnetic field interference through calibration even in environments with magnetic field disturbances. The heading is calculated in real-time by the central processor, with dynamic pitch and roll angles used for dynamic heading compensation across a wide range of magnetic azimuths. This ensures the compass provides high-precision heading data even at tilt angles up to ±85°.
The electronic compass integrates a high-level DSP arithmetic processor with diversified output modes. Standard interfaces include RS232/RS485/TTL, with other high-vibration communication interfaces available as custom options. The DDM350B/DDM360B features compact dimensions and low power consumption, making it suitable for marine vessels, antennas and satellites, commercial drones, and other extremely harsh environments. It is particularly well-suited for today's various high-precision measurement integrated control systems.
Key Features
- Inclination angle measurement range: pitch ±85°, roll angle ±180°
- Hard magnetic, soft magnetic and tilt angle compensation
- Standard RS232/RS485/TTL output interfaces
- Wide temperature range: -40℃ to +85℃
- Inclination resolution: 0.1°
- Inclination accuracy: 0.2°
- Azimuth angle accuracy: 0.8°
- DC 5V power supply
- IP67 waterproof rating
- Dimensions: L55*W37*H24mm
Applications
- Satellite antenna search
- Antenna servo control
- Marine surveying and mapping
- Infrared imager
- Special occasion robots
- GPS integrated navigation
- Laser rangefinder
- ROV underwater robot navigation
Technical Specifications
| Parameter Category | Parameter | Specification |
| Compass Heading | Heading Accuracy | 0.8° |
| Resolution | 0.1° |
| Pitch Range | ±90° |
| Roll Range | ±180° |
| Inclination Accuracy | Static: 0.2°, Dynamic: 0.5° |
| Inclination | Resolution | 0.1° |
| Tilt Compensation | Angle Range | Roll ±180°, Pitch <85° |
| Calibration | Hard Iron Calibration | Yes |
| Soft Iron Calibration | Yes |
| Magnetic Field Interference Calibration | One rotation of the plane (two-dimensional calibration) |
| Physical Features | Size | Shell: L55*W37*H24mm, PCBA: L33*W27*H9mm |
| Interface Connection | Shell: 4PIN 1m direct lead, Single-board: 4 PIN 30cm terminal wire |
| Weight | Single board: ≤25g, Enclosure: ≤135g (including 1 meter cable) |
| Interface | Startup Delay | <50ms |
| Output Rate | 5~100Hz (settable) |
| Baud Rate | 4800 to 115200 baud |
| Output Format | Binary high performance protocol |
| Power Supply | Default: DC +5V, Customized: DC 9-36V |
| Power | Current (MAX) | 45mA |
| Ideal Model | 35mA |
| Environment | Operating Range | -40℃ to +85℃ |
| Storage Temperature | -40℃ to +85℃ |
| Vibration Resistance | 2500g |
| EMC | According to EN61000 and GBT17626 |
| MTBF | ≥98000 hours/time |
| Insulation Resistance | ≥100 megohm |
| Impact Resistance | 100g@11ms, 3 Axial Direction (Half Sinusoid) |
| Anti-vibration | 10grms, 10-1000Hz | |
