FOG North Finder Module for Autonomous Navigation and Inertial Alignment

FOG North Finder is an advanced north-seeking instrument that determines true north without magnetic interference. It uses a fiber optic gyroscope to measure the Earth’s rotation rate and calculate azimuth and attitude angles with exceptional stability and speed.
This all-in-one electromechanical system combines a FOG sensor, precision accelerometer, servo rotation control, and embedded computer. It achieves north-seeking accuracy of ≤0.3° (NF701A) and ≤0.5° (NF701B), with a setup time under 3 minutes.
Weighing less than 2 kg and consuming only 15 W, the unit is ideal for field applications in UAVs, land vehicles, and marine navigation. The device operates reliably from -40 °C to +70 °C, powered by DC 12–24 V, and communicates via RS-422 interface

Overall dimensions

Dimension (mm): 115 × 90 × 110

1.2 Main technical indicators

A) North seeking time: ≤ 3 min;

B) North seeking accuracy (1σ): ≤ 0.3 ° (NF701A); ≤ 0.5 ° (NF701B)

C) Horizontal accuracy: ≤ 0.05 ° (1σ);

D) Circumference: ≤ 0.5 ° (1σ)

E) Weight: ≤ 2 kg;

F) Power supply: DC 12V ~ 24V;

G) Power consumption: 15 W (peak);

H) Interface: RS422

I) Working mode: start automatic self-check after power on, control north seeking by the upper computer, and send north seeking results to the upper computer after north seeking is completed;

1.3 Environmental requirements

1) Working temperature: -40 ℃ ~ + 70 ℃;

2) Storage temperature: -55 ℃ ~ + 85 ℃.

3) Humid and hot environmental conditions: relative humidity is less than 95%.

4) Appearance: The metal surface shall be free of rust, and the coating shall be free of blistering, peeling, etc.

1.4 Electrical performance

Insulation resistance: the insulation resistance between the independent circuits of the fiber optic gyroscope north finder and between the circuit and the shell shall not be less than 10 MΩ under standard atmospheric conditions.

1.5 Reliability and maintainability

MTBF ≥ 1000 hours;

MTTR ≤30min.

1.6 External interface

1.6.1 With DC12 V ~ 24V power input.

1.6.2 With serial port output function.

1.8.3 External plug:

Interface Y50EX-0607TX2, see the table below for pin definition.

Shenzhen Fire Power Control Technology Co., Ltd. is a professional manufacturer specializing in the production of electronic products and inertial devices, and providing technical consultation and export services. The company has a strong independent team. The technical team is composed of many outstanding experts with more than 50 years of comprehensive industry experience. The company has strong technical strength in the fields of vibration acceleration sensors, MEMS gyro, Micro-nano fiber optic gyroscope , North Finder,Angle testing equipment and other products, and is able to provide users with professional design, development, production and services of inertial devices and related simulation software.

Technical Advantages

Firepower technology fully possesses independent design capabilities in vibration acceleration sensors,North Finder, MEMS gyro, IMU,Micro-nano fiber optic gyroscope , angle testing equipment and other products. We have accumulated over ten years of research and development experience in the fields of optical sensing, MEMS sensing, with strong technical strength. We have mastered multiple core technologies including MEMS gyroscope and acceleration chip design, multi-core fusion technology, silicon optical chip technology, optical sensing. With the accumulation of technology, we have the ability to scale up industries and are in a leading position worldwide. Not only can we provide customers with high-performance products, but we can also significantly reduce production costs.

Production Capacity

Firepower has four subsidiaries with production line respectively, which are MEMS inertial product production line, micro-nano integrated inertial production line,vibration acceleration sensor production line and angle test equipment production line. A total investment of 15, 000 square meters has been built for scientific research and production, including 650 square meters 10, 000-class clean rooms that meet national standards, electrical-mounting production lines and environmental testing centers.

With more than ten years development, Firepower has become a high-tech enterprise with high level of craftsmanship and comprehensive products range in China. We have complete production line from chips to finished products after all testing, providing first level products among peers in domestic and over-sea market.

Production Environment

We have built clean rooms, electrical assembly production line, and environmental testing center that comply with the national "Clean Building Design Specification". It has complete precision measuring instruments and testing equipment, angle testing systems, high and low temperature test chambers, vibration and shock test benches, precision optical indexing heads, functional centrifuges, mechanical testing rooms ,anechoic chambers, multi axis angle test equipment and other instruments and testing equipment to ensure product quality.