KONGSBERG DPS112

Description

Material Composition

• Outer rack housing: Aerospace-grade lightweight aluminum alloy sheet metal with anti-salt-fog anodic oxidation coating
• Internal satellite receiving circuit: Low-noise RF ceramic PCB
• Built-in operation display: Industrial monochrome LCD screen with backlight
• Control keypad: Silicone rubber anti-corrosion membrane keypad
• Communication interface connectors: Marine-grade gold-plated stainless steel circular connectors
• Thermal compensation components: PTC constant-temperature heating film for low-temperature marine environment operation

Structural Features

1. Standard 19-inch 1U rack-mount integrated unit form factor for marine control room cabinet installation
2. Front panel integrated built-in LCD status display and membrane operation keypad for on-site parameter configuration
3. Independent L-band correction signal antenna port, GNSS antenna input port, multi-channel data communication connectors
4. Internal closed-loop thermal heating circuit for stable receiver operation under low seawater ambient temperature
5. Multi-layer EMI shielding internal cavity isolates RF satellite receiving circuit and digital signal processing circuit
6. Rear panel ventilation grille with dust-proof filter cotton for passive heat dissipation in marine salt fog environments

Technical Specifications

• Model Identifier: DPS112
• Supported Satellite Constellations: GPS L1/L2, GLONASS L1/L2, SBAS regional augmentation satellites
• Differential Correction Signal Support: Fugro Seastar G2 global L-band correction, IALA marine beacon correction, standard RTCM differential data input
• Positioning Accuracy Performance: Base DGNSS mode: Sub-meter horizontal positioning accuracy Seastar G2 service activated: Decimeter-level global horizontal positioning accuracy
• Built-in User Interface: Monochrome LCD display + 6-key membrane operation keypad
• Standard Communication Interfaces: 1 × 10/100 Mbps Ethernet port 2 × CAN bus marine standard communication channels 2 × RS232/RS422 serial data output ports 1 × USB 2.0 firmware upgrade port
• Operating Temperature Range: -20 ℃ ~ +65 ℃
• Storage Temperature Range: -40 ℃ ~ +85 ℃
• Marine Environmental Humidity Tolerance: 5% ~ 98% RH, salt fog corrosion resistance compliant with IEC 60068-2-52
• Vibration Resistance Standard: DNV marine vibration certification for shipboard hull continuous vibration
• Power Supply Rating: 24 VDC marine stabilized power supply, input tolerance ±20%
• Unit Dimension: 483 mm (W, standard 19-inch rack) × 44 mm (H, 1U) × 320 mm (D)
• Net Weight: 4.8 kg
• MTBF Marine Service Life: ≥ 150,000 operating hours

Function Features

1. Dual GPS+GLONASS multi-constellation signal reception improves satellite tracking availability under sheltered offshore signal occlusion environments
2. Built-in L-band receiver module directly receives Fugro Seastar G2 global differential correction signals without external correction radio equipment
3. Real-time vessel position, velocity, satellite tracking status and differential correction quality displayed on front built-in LCD screen
4. Multi-channel simultaneous data output via Ethernet, CAN and serial ports to connect vessel DP controller, navigation monitoring system and ship data recorder
5. USB port supports offline firmware upgrade and positioning historical data export to storage media
6. Configurable RTCM differential data input interface compatible with shore-based marine beacon correction stations
7. Automatic satellite signal fault diagnosis function; alarms for weak signal, correction signal loss and antenna open/short circuit
8. Optional external graphical display terminal dedicated for dynamic positioning operator real-time position monitoring

Working Principle

Dual GNSS antennas transmit GPS and GLONASS satellite RF signals to DPS112 internal low-noise RF receiving circuit, which demodulates satellite navigation ephemeris and pseudo-range measurement data. The built-in L-band receiver continuously receives Fugro Seastar G2 global differential correction data via dedicated L-band antenna, transmitting correction parameters to the positioning calculation processor. The main computing chip combines raw satellite observation data and differential correction data to resolve vessel three-dimensional coordinates, velocity and heading at fixed 1 Hz update frequency. Calculated positioning data is simultaneously output to multiple communication interfaces for transmission to ship DP control system and navigation monitoring equipment. Front-panel LCD and keypad circuit realize local parameter configuration and real-time state query, while internal PTC heating film activates automatically when ambient temperature drops below 0 ℃ to maintain RF circuit operating temperature stability. The aluminum rack housing with anti-salt-fog coating and internal EMI shielding cavity suppress marine electromagnetic interference and salt fog corrosion damage.

Advantage Highlights

1. Global decimeter-level positioning accuracy via Seastar G2 service, independent of regional SBAS signal coverage limitations
2. Dual GPS+GLONASS multi-constellation reception ensures reliable positioning under offshore platform hull signal occlusion conditions
3. Complete marine environmental certification (DNV) for permanent installation on all types of offshore and coastal vessels
4. Integrated L-band differential correction receiver eliminates external separate correction radio hardware cost
5. Standard 19-inch 1U rack form factor compatible with universal marine control room cabinet layout
6. Multi-channel redundant communication interfaces avoid single data transmission path failure risk for critical DP control systems
7. Built-in display and keypad enable on-site calibration without external laptop configuration equipment

Applicable Industries

Offshore oil & gas platform supply vessels, marine dynamic positioning (DP) drillships, dredging engineering ships, ROV/AUV underwater operation support vessels, coastal search & rescue vessels, offshore wind farm installation vessels, marine survey mapping ships

Installation Requirements

1. Install the DPS112 unit inside ship control room standard 19-inch marine rack cabinet, fix with matched rack mounting ears and M6 stainless steel screws
2. GNSS antenna and L-band correction antenna must be mounted on vessel open deck without overhead structural signal occlusion
3. All antenna signal cables use marine-grade shielded coaxial cable with anti-salt-fog outer sheath, cable connectors coated with waterproof anti-corrosion grease
4. Control cabinet must be equipped with dehumidification heating equipment to maintain internal relative humidity below 80% RH
5. DC24V power supply connected to vessel marine isolated power distribution bus, separated from high-power propulsion equipment power circuit

Usage Precautions

1. Regularly clean front panel LCD display ventilation filter cotton every 30 days to prevent salt fog dust blockage of heat dissipation grille
2. Execute annual antenna cable insulation resistance test to avoid seawater infiltration-induced signal attenuation
3. Renew Fugro Seastar G2 differential correction service subscription to maintain decimeter positioning accuracy
4. Do not cut off DC24V power supply during firmware upgrade via USB port; power interruption causes receiver program corruption
5. Avoid installing the unit adjacent to ship radar and high-power VHF radio equipment to prevent RF signal interference
6. Replace built-in PTC heating film assembly every 5 years to guarantee low-temperature stable operation in polar offshore marine environments