High Precision FOG North Seeker

ER-FNS-02 High Precision FOG North Seeker

Introduction 

The FOG north seeker is mainly used for quickly and autonomously determining the true north direction. The Earth's rotational speed is obtained through high-precision fiber optic gyroscope. The signal of the Earth's rotational speed is calculated to determine the Angle between the gyroscope's main axis and the Earth's true north direction, providing azimuth information for the carrier. It does not rely on satellite signals and can provide accurate true north direction references in closed or complex environments.

The ER-FNS-02 series single-axis FOG north seeker is mainly composed of a high-precision single-axis fiber optic gyroscope, a high-precision rotation mechanism, a digital signal processing unit, and other mechanical components.

Applications

• High-precision geodetic surveying: Topographic mapping in remote areas (mountainous regions, deserts), terrain surveying in areas without satellite signals, orientation calibration of geodetic control points, replacing traditional optical theodolites;
• Precision equipment calibration: Installation and calibration of radar antennas and satellite receiving antennas, ensuring that the reference axis of the equipment is aligned with the true north direction;
• Precise measurement experiment: Directional reference for quantum physics and astrophysics experiments, ensuring the stability of the experimental setup and the accuracy of the data;
• Tunnel Engineering: Precise orientation of tunnel boring machines (TBM), especially for long-distance tunnels (such as high-speed rail tunnels and urban subways), controlling the excavation direction in the underground enclosed environment to avoid deviations.

Specifications

Model	ER-FNS-02A	ER-FNS-02B	ER-FNS-02C
North seeking precision	0.02°secψ	0.06°secψ	0.1°secψ
Attitude precision	0.02°	0.06°	0.1°
North seeking measurement range	0°~360°
Attitude measurement range	-15°~+15°
North seeking time	5min
Power and environment
Working temperature	5℃~+55℃
Power supply	DC12V~28V
Power consumption	≤30W
Output interface	RS422
Physical characteristics
Outline dimension (mm)	220×200×215
Weight (kg)	10Kg	10Kg	10Kg

Dimensions

Wiring definition

J30J-21ZK

No.	J30 Pin	Connecting Point	Definition	Note
1	1、3	DY-12V~28V	12V~28V	power supply
2	2、4	DY-GND6	GND
3	8	DHB-DT+	R+	422
4	9	DHB-DT-	R-
5	10	DHB-DR+	T+
6	11	DHB--DR-	T-

Usage and maintenance

During use, if it is found that the north seeker does not output serial port data, one should check whether the connection is correct, whether the serial port settings and data reception format are correct. If the checks are all correct, professional personnel should be sought for repair.

Cautions

The North Seeker should be handled with care during transportation and installation, and must not be subjected to impact.

During the process of seeking the north, the carrier must remain absolutely stationary. Otherwise, the accuracy will be affected.

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Application Techniques

1.Applicable to coal mines, tunnels, and exploration! North seeker's strength revealed

2.How important is the North Seeker in the field of oil、mining and drilling?

3.OEM customization, easy integration! The North Seeker helps operations in multiple fields to be more accurate and efficient!

4.Efficient mining, north seeker assists mining drilling operations

5.Accurate orientation, easy to deal with! North seeker helps work more efficiently

6.Not restricted by the environment, MEMS north finders help various fields achieve high-precision orientation

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