F2X70 Dual-Axis Medium Precision FOG

Strong Environmental Adaptability
High Reliability, Ultra-Long Lifetime
Fully DigitalRS-422 Electrical Interface Output

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Description

Main Features

Miniature Compact Design
All-Solid-State Design
Strong Environmental Adaptability
High Reliability, Ultra-Long Lifetime
Fully DigitalRS-422 Electrical Interface Output

Application Fields

EO Pod
Flight Control Platform
Optical/Photography Platform
Platform Stabilization Device
SatCom-on-the-Move
Inertial Measurement Unit
Lightweight UAV

Product Overview

The F2X70 is a miniaturized fiber optic gyroscope with integrated circuitry and optical paths that break from traditional designs. It serves as an ideal high-precision angular rate sensor for control applications and is widely used in inertial measurement. Built on proven designs with engineering optimizations for mass production, it delivers exceptional cost performance. Featuring compact size, light weight, low power consumption, and a simple interface, the F2X70 is the top choice for navigation and control fields.

Unique Technology

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, it ensures product reliability and consistency. The F2X70 dual-axis FOG is used in geodetic surveying, mineral/oil exploration, oil drilling guidance, and tunnel construction for positioning and path measurement, as well as dam inclination measurement.

F2X70 Dual-Axis Medium Precision FOG

F2X70 Dual-Axis FOG Performance Parameters

Parameter	A	Remarks
Bias Stability (°/hr,1σ,10s)	≤0.20	2h Continuous Test,10s avg. Result.
Stabilization Time (s)	＜100
Bias Repeatability (°/hr,1σ)	≤0.2	3 Test Runs Calculation Result.
Resolution (°/hr,1σ )	≤0.2
Angle Random Walk (°/√hr)	≤0.02
Full-Temp Bias Stability (°/hr)	≤0.5
Scale Factor Nonlinearity (ppm)	≤20	Room Temperature
Scale Factor Repeatability (ppm)	≤50	Room Temperature
Dynamic Range (°/s)	±400
Bandwidth (Hz)	≥500
Operating Temperature (℃)	-40～+65
Storage Temperature (℃)	-50～+70
Vibration Condition (g, Hz)	4.2, 20～2000
Weight (g)	300±50
Dimensions (mm)	646042

Dimensional Drawing

product-1315-706

Introduction

As a new type of all-solid-state gyro, fiber optic gyroscope has the advantages of fast startup, wide measurement range and high reliability, etc. F2X70 dual-axis medium-precision fiber optic gyro can be applied to can be applied to vehicle-mounted stabilized platforms, guide heads, sling bins, etc.

1.1 Application

This instruction manual only applies to F2X70 type products, which contains performance Index, technical conditions, external dimensions and installation and use. Among them, the technical conditions include the product's environmental range, electrical performance, and physical characteristics.

1.2 Main Parameters

1.2.1 Main Parameters:

Table 1 Product main performance index

Bias Stability °/hr (1σ,10s)	≤0.20	2h continuous testing, 10s smoothing results
Stabilization Time s	<100
Bias Repeatability °/hr (1σ)	≤0.2	Calculated results of 3 test data
Resolution °/hr (1σ)	≤0.2
Random Walk Factor °/√hr	≤0.02
Bias Repeatability at Full Temperature °/hr	≤0.5
Scale Factor Nonlinearity (ppm)	≤20	Room temperature
Scale Factor Repeatability (ppm)	≤50	Room temperature
Dynamic Range °/s	±400
Bandwidth Hz	≥500
Operating Temperature ℃	-40～+65
Storage Temperature ℃	-50～+70
Vibration Condition g, Hz	4.2,20～2000

1.2.2 Mechanical Testing

1.2.2.1 Sinusoidal Sweeping Vibration

The gyro is fixed on the vibration table through the fixture according to the direction of vibration, and the gyroscope carries out sinusoidal scanning in 3 directions, corresponding to the X-axis, Y-axis, and Z-axis directions, respectively. Vibration steps; vibration table plus excitation, to the gyroscope power, after a certain period of warm-up (gyro start-up time), test the output value of the gyroscope, about 5min; sinusoidal vibration. Vibration conditions: 20Hz-2000Hz, scanning time 5min, amplitude 4.2g. vibration process, record the gyroscope output.

Random Vibration

Vibration Frequency: 20Hz~2000Hz

Vibration Time: 5min for each axis

Vibration Direction: X, Y, Z axis

Vibration Spectrum: see Figure 1

product-1349-635

Index requirements:

Fiber optic gyro shall be no resonance with sinusoidal scanning in the range of 20 HZ to 2000 Hz;

Random vibration: the absolute value of the bias in the vibration and the average bias before and after the vibration shall be less than 0.2º/h.

1.2.2.2 Mechanical impacts are as required by Table 2.

Table 2 Impact Conditions

Peak Acceleration (g)	30
Duration (ms)	10
Times of Impacts	3 times in each direction
Waveform	half-sine wave
Directions	X, Y, Z
Directions	Note: The interval between two impacts is not less than 1.5s.

Impact process, the product should be able to work normally after mechanical impacts in the state of electricity, the bias should be less than 0.2º/h before and after the impact.

2 Communication Protocol

2.1 RS-422 Method

Baud rate: 460.8K;

Communication frame format

Per frame contains 10 bytes, the first byte is 0x80. Byte 1, 2, 3 are the high, medium and low 8-bit data of the gyro in horizontal direction. Byte 5, 6, 7 are the high, medium and low 8-bit data of the gyro in vertical direction. Byte 8, 9 are for the temperature, Byte 10 is the sum of byte 2-9, takes the lower 8 bits.

The format is shown in Table 3, 11 bits per byte, in the following order: Start from 1 bit

Data bit is 8 bits (send low first, then high), even parity is 1 bit, stop bit is 1 bit

Communication Rule

The gyro starts to send data after it detects falling of the external trigger signal, 2000Hz supported.

Table 3 Format of Each Byte of The Output Data Frame

Byte	Significance	Bit 7	Bit 6	Bit 5	Bit 4	Bit 3	Bit 2	Bit 1	Bit 0
1	Header	1	0	0	0	0	0	0	0
2	Horizontal gyro high 8 bits	PD23	PD22	PD21	PD20	PD19	PD18	PD17	PD16
3	Horizontal gyro medium 8 bits	PD15	PD14	PD13	PD12	PD11	PD10	PD9	PD8
4	Horizontal gyro low 8 bits	PD7	PD6	PD5	PD4	PD3	PD2	PD1	PD0
5	Vertical gyro high 8 bits	CD23	CD22	CD21	CD20	CD19	CD18	CD17	CD16
6	Vertical gyro medium 8 bits	CD15	CD14	CD13	CD12	CD11	CD10	CD9	CD8
7	Vertical gyro low 8 bits	CD7	CD6	CD5	CD4	CD3	CD2	CD1	CD0
8	Temperature	X	X	T13	T12	T11	T10	T9	T8
9	Temperature	T7	T6	T5	T4	T3	T2	T1	T0
10	Verification frame	Sum of byte 2 to 9 take the lower 8 bits.

3 Connection Definition

The gyroscope electrical interface uses a J30-15ZK connector, defined in Table 4.

Number	Definition	Mark	Color
1	Serial T+	TX+	Yellow
2	Serial T-	TX-	Orange
3	Serial port R+	RX+	Blue
4	Serial port R-	RX-	Green
5, 13	Power supply +5V	+5V	Red
6, 7	POWER GROUND	GND	Black

4 Dimensions

Horizontal dual-axis fiber-optic gyroscope external dimensions: 70mm × 70mm × 43mm, mounting dimensions: four holes 62mm × 62 mm, mounting screws: 4 M3 screws, the shape and mounting dimensions shown in Figure 2.

product-450-242