F3X50 Three-Axis Fiber Gyro IMU

 

 

 

• Mobile survey & attitude
• Unmanned systems (ground/marine/UW)
• Surveying & north-finding
• Stabilized platforms
• SATCOM-on-the-move
• Autonomous driving & munitions

 

 

Company's F3X50 is a lightweight three-axis FOG inertial measurement unit that measures three-axis angular rates via the Sagnac effect. With a built-in low-noise three-axis MEMS accelerometer, it simultaneously outputs angular and velocity increments. Featuring an all-solid-state design with no moving parts, it delivers high precision, compact size, light weight, long service life, and high reliability, with digital interfaces for easy system integration. It is widely used in aviation, aerospace, marine, ordnance, mining, and automotive sectors for navigation, guidance, and attitude control.

 

 

Company is a high-tech enterprise with full closed-loop capabilities from fiber winding equipment and coils to FOGs, fiber/MEMS inertial products, IMU circuits, software, and test equipment. End-to-end process control improves quality and reduces costs. Operating under ISO9001 with strict processes, it ensures product reliability and consistency.

 

 

Parameter	A	B
Fiber OpticGyro
Bias Stability (°/h, 1s, 10s)	≤0.15	≤0.15
Bias Repeatability (°/h, 1s, 10s)	≤0.15	≤0.15
FT Bias Stability (°/h, 1s, 10s)	≤0.5	≤0.5
Random Walk (°/1/2)	≤0.02	≤0.02
Scale Factor Nonlinearity (ppm)	≤50	≤50
Scale Factor Asymmetry (ppm)	≤30	≤30
Scale Factor Repeatability (ppm)	≤100	≤100
FT Scale Factor Variation (ppm)	≤500	≤500
Range (°/s)	-500~+500	-500~+500
MEMSAccelerometer
0g Bias Drift (mg/°C, all axes)	0.75 (max)	0.75 (max)
Zero Stability (g, 1s)	≤1×10-4	≤1×10-4
Noise (μg/√Hz, all axes)	80	80
Range (g)	±10.24, ±20.48, ±40.96 (selectable)	±10.24, ±20.48, ±40.96 (selectable)
System
Bandwidth (Hz)	≥500	≥500
Steady-State Power (W)	≤5.0	≤5.0
Insulation Resistance (MΩ)	＞100	＞100
Weight (g)	≤280	≤300
Dimensions (mm)	67*73*49	87*74*56

 

 

 

 

Product Overview

F3X50 fiber optic gyro IMU is a compact, lightweight, high-reliability inertial measurement device featuring high accuracy, small volume, no moving parts, high reliability, and long lifetime. Its digital output enables easy system integration for aerospace, defense, marine, weapons, mining survey, and automotive electronics applications.

 

1.2 Product Functions

This product is an inertial angular rate sensor based on the Sagnac principle, measuring angular rate about its sensitive axes. It provides three-axis angular increment signals.

1.3 Product Composition

The product consists of the following components:

a) Optical path: light source, coupler, Y-branch waveguide, fiber coil, detector;

b) Circuits: main board with integrated MEMS accelerometer, light source board, preamplifier board;

c) Mechanical: housing, cover, etc.

1.4 Main Performance Specifications

F3X50 fiber optic gyro IMU achieves the following performance specifications after 5 s power-on, as shown in Table 1.

Table 1 F3X50 Fiber Optic Gyro IMU Performance Specifications

Parameter	A	B
Fiber OpticGyro
Bias Stability (°/h, 1s, 10s)	≤0.15	≤0.15
Bias Repeatability (°/h, 1s, 10s)	≤0.15	≤0.15
FT Bias Stability (°/h, 1s, 10s)	≤0.5	≤0.5
Random Walk (°/h1/2)	≤0.02	≤0.02
SF Nonlinearity (ppm)	≤50	≤50
SF Asymmetry (ppm)	≤30	≤30
SF Repeatability (ppm)	≤100	≤100
FT SF Variation (ppm)	≤500	≤500
Range (°/s)	-500~+500	-500~+500
MEMSAccelerometer
0g Bias Drift (mg/°C, all axes)	0.75 (max)	0.75 (max)
Zero Stability (g, 1s)	≤1×10-4	≤1×10-4
Noise (μg/√Hz, all axes)	80	80
Range (g)	±10.24, ±20.48, ±40.96 (selectable)	±10.24, ±20.48, ±40.96 (selectable)
System
Bandwidth (Hz)	≥500	≥500
Steady-State Power (W)	≤5.0	≤5.0
Insulation Resistance (MΩ)	＞100	＞100
Weight (g)	≤280	≤300
Dimensions (mm)	67*73*49	87*74*56

1.5 Dimensions

External and mounting dimensions are shown in Figure 1. The mounting surface serves as the fixed interface; M3 screws are used.

Housing color: black anodized.

Fig. 1 F3X50Fiber Optic Gyroscope IMU Dimensions

 

1.6 Weight

Weight: ≤280 g

1.7 Operating Environment

Operating Temperature: -40°C to +65°C

Storage Temperature: -50°C to +75°C

Vibration: 6.06 g RMS, 10 Hz to 2000 Hz.

 

 

2.1 External Power and Consumption

External power supply requirements are shown in Table 2.

Table 2 External Power Requirements

Voltage	Voltage Range	Ripple	Current
+5V	±5%	≤50mV	≤2.0 A(startup transient)
			≤1.2A(steady)

Steady-state power: <4 W at RT, <6 W full temp; transient: <10 W (startup).

 

2.2 Electrical Interface

F3X50 fiber optic gyro IMU uses pigtail wiring for external electrical connections. Cable length is customizable; wire diameter: Ф0.14 mm. Pinout shown in Table 3.

Table 3 J30J-15ZK 15-Pin Connector Pinout

Connector (J30-15ZK)	Pin	Signal ID	Signal Name	Direction
	1,9	+5V	Power +	IN
	2,10	GND	GND	IN
	4	R+	RS422 RX+	IN
	12	R-	RS422 RX-	IN
	3	T+	RS422 TX+	OUT
	11	T-	RS422 TX-	OUT
	5	COM_GND	422 GND	OUT
	13	PPSin	PPS Input	Reserved
	6	Synclkin	Clock Input	Reserved
	14	Pulse1in	Camera Pulse 1	Reserved
	7	Pulse2in	Camera Pulse 1	Reserved
	15	Synclkout	Clock Output	Reserved
	8	PPSout	PPS Output	Reserved

When connecting or contacting the product's connector terminals, ESD precautions must be taken per GJB 1649-1993.

 

2.3 Output Signal Format

Output format: RS-422;

Baud rate: 921600 bps;

Checksum: cumulative sum (bytes 3-61);

Detailed definition below:

Bytes	Format	Description
0	Uint8	0x55
1	Uint8	0xAA
2	Uint8	Checksum (3~61byte sum)
3	Uint8	PPS(1~10,5mswhich slot0.5msreceivedPPSsignal)
4~5	Uint16	Status Word (bit0andbit2both at1flagPPSreceived;bit3is camera pulse1flag)
6~9	Uint32	IMU Time(5mscounter)
10~13	Float32	Gx(5msang. inc., LSB: rad)
14~17	Float32	Gy(5msang. inc., LSB: rad)
18~21	Float32	Gz(5msang. inc., LSB: rad)
22~25	Float32	Ax(5msvel. inc.,m/s)
26~29	Float32	Ay(5msvel. inc.,m/s)
30~33	Float32	Az(5msvel. inc.,m/s)
34~35	int16	xGyro Temp (value/350 = Gyro temp ℃)
36~37	int16	yGyro Temp (value/350 = Gyro temp ℃)
38~39	int16	zGyro Temp (value/350 = Gyro temp ℃)
40~41	int16	MEMSAccel Temp (value/350 = Accel temp ℃)
42~43	int16	Reserved
44~45	int16	Reserved
46	Uint8	Camera Pulse1(1~10,5mswhich slot0.5msreceived signal)
47~48	Uint16	Camera Pulse Time1(unit:1/40M, each count =25ns)
49	Uint8	Reserved
50~51	Uint16	Reserved
52	Uint8	Reserved
53~54	Uint16	Reserved
55	Uint8	Reserved
56~57	Uint16	Reserved
58~59	Uint16	2kCycle Count (unit:1/40M, each count =25ns)
60	Uint8	Reserved
61	Uint8	Reserved
62	Uint8	0xC0
63	Uint8	0xFF

 

2.4 Installation

Installation Requirements

The user is responsible for installation and removal. The product must not be subjected to impacts or mechanical processing of its external surfaces during these procedures.

Pre-Installation Inspection

Inspect product exterior for physical damage such as dents;

At room temperature, verify insulation resistance ≥60 MΩ between all output connector pins and housing using a megohmmeter;

Check all electrical parameters under power if necessary;

Mounting surface flatness: better than 0.02 mm;

Post-Installation Inspection

Verify all mounting screws are securely tightened.

 

2.5 Maintenance

Before installation: power on at least once per year for 3600 s each; parameter monitoring is not required during this check;

After installation: power on at least once per year for 3600 s; parameter monitoring not required;

Recalibrate every 8 years (performed by the manufacturer).

 

2.6 Troubleshooting

This product is fully sealed and cannot be repaired on-site. Any fault must be returned to the manufacturer for repair.

The following lists potential non-product faults (see Table 4). For other technical issues, please contact the manufacturer.

Table 4 Common Faults and Troubleshooting

No.	Symptom	Root Cause	Solution
1	Powered on, +5V ammeter reads ~0	No power or insufficient supply current	Check power supply and circuit; restore power
2	Powered on, +5V current normal but acquisition software not functioning	Test equipment acquisition system fault	Check connection cables and equipment power
		Software conflict	Restart test computer
3	Powered on, +5V current abnormal	Possible internal short in test equipment	Inspect test equipment

 

2.7 Transport and Storage

• Transport Precautions
• Orient the product per packaging markings;
• Transport by road, rail, air, or water is permitted within -45°C to +75°C;
• Ensure packaging is firmly secured and will not shift during transport.
• Storage Precautions
• Products in packaging should be stored under standard atmospheric pressure in air-conditioned warehouses at 15°C to 35°C with 20%-80% relative humidity;
• Storage life: 15 years.

 

2.8 Unpacking and Inspection

• Unpacking Inspection
• Inspect packaging for physical damage;
• Use ESD protection when removing the product.
• Delivered Documents Checklist
• Product Certificate of Conformance;
• Product Acceptance Report;
• User & Maintenance Manual (one per batch).

 

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