The GDM355/GDM365 is a three-dimensional dynamic electronic compass integrating a 12-axis inertial measurement unit, encompassing three-axis attitude angle measurement, three-axis accelerometer, three-axis gyroscope, and three-axis magnetometer. Utilizing the high dynamic angle response of the gyroscope and the stable attitude output capability of the accelerometer under static conditions, combined with dynamic inertial navigation algorithms, it can calculate the pitch and roll angles in real time during complex attitude changes. For geomagnetic azimuth, the product incorporates hard and soft magnetic calibration algorithms to effectively suppress geomagnetic interference in environments with magnetic field disturbances. The central processing unit calculates the heading in real time and uses dynamic pitch and roll angles to perform dynamic heading compensation for a wide range of magnetic azimuth, ensuring reliable heading output even at tilt angles of ±85°. The compass is equipped with a high-performance DSP processor, supporting standard interfaces such as RS232, RS485, and TTL, and other interfaces can be customized upon request.
The GDM355/GDM365 features a compact size and low power consumption, making it suitable for applications with high vibration tolerance, such as marine vessels and antenna satellite search. It can also operate stably under harsh environmental conditions, making it suitable for various systems that require high precision in measurement, integration, and control.
Technical Characteristics
❖ Tilt resolution: 0.1°
❖ Static tilt accuracy: 0.2°, dynamic accuracy: 0.5°
❖ DC 5V power supply
❖ Standard RS232/RS485/TTL output interface
❖ With hard magnet, soft magnet and tilt compensation
Application Field
❖ Marine Navigation and Surveying ❖ GPS Integrated Navigation System
❖ Antenna Servo Control ❖ Infrared Imager Integration
❖ Laser Ranging Equipment Collaboration ❖ Map Completion System Support
❖ ROV Underwater Robot Navigation ❖ Marine Survey Instrument Support
❖ Remote Intelligent Systems
Specifications
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GDM355/365
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Parameter Indicator
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Compass heading parameters
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Heading accuracy
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1°
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Resolution
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0.1°
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Pitch measurement range
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±90°
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Roll measurement range
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±180°
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Tilt accuracy
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Static 0.2°
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Dynamic 0.5°
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Resolution
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0.1°
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Tilt compensation angle range
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Roll ±180°
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Pitch＜85°
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Three-axis magnetic field
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Measurement range
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±800uT
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Calibration
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Hard iron calibration
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Yes
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Soft iron calibration
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Yes
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Magnetic field interference calibration method
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Planar rotation (2D calibration)
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Interface characteristics
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Startup delay
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<50 ms
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Output rate
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5~100Hz(adjustable)
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Baud rate
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4800 to 115200baud
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Output format
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Binary high-performance protocol
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Power supply
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Supply voltage
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(Default)DC +5V
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(Custom)DC 9~36V
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Current (MAX)
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45mA
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Ideal mode
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35mA
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Sleep mode
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TBD
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Environment
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Operating range
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-40℃~+85℃
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Storage temperature
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-40℃~+85℃
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Vibration resistance
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2500g
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Electromagnetic compatibility
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Compliant with EN61000 and GBT17626
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Insulation resistance
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≥100 megohms
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Shock resistance
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100g@11ms, triaxial (half-sine wave)
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Vibration resistance
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10grms / 10~1000Hz
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Dimensions
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PCBA dimensions: L33×W27×H9mm
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Case dimensions: L55.5×W37×H24mm
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Cable length/weight
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PCBA trace length: 20cm±3cm
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Case trace length: 200cm±10cm
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Weight
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PCBA weight: ≤25g
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Case package weight: ≤117g (excluding cables)
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PIN Definition
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Pin/Thread Color
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PCBA Definition
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Description
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Black
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GND
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Negative power supply terminal
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Red
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DC 5V
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Positive power supply terminal
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Yellow
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TTL/RS232_RXD/RS485_D-
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Receive data
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Green
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TTL/RS232_RXD/RS485_D+
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Transmit data
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Pin/Thread Color
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Enclosure package definition
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Description
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PIN1/Red
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DC 5V
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Power supply positive terminal
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PIN2/Yellow
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TTL/RS232_RXD/RS485_D+
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Receive data
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PIN3/Green
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TTL/RS232_RXD/RS485_D-
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Transmit data
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PIN4/Black
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GND
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Power supply negative terminal
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Product Dimensions
PCBA Dimensions: L33×W27×H9mm
Mounting Dimensions: L28.5×W22.6×H2mm
Recommended Screws: 4 M3 screws(copper screws)
Product Tags:
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GDM355 / GDM365 Dynamic 3D Electronic Compass Sensor For Antenna Servo Control Images
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