High Accuracy FOG IMU

ER-FIMU-40:
1.No wearing parts, long service life and high reliability
2. Small in size, light in weight, and easy to integrate
3. Fast dynamic response, suitable for complex motion scenarios

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Introduction

ER-FIMU-40 High Accuracy FOG IMU

ER-FIMU-40 FOG inertial measurement unit is specially developed for tactical system applications. The product consists of all solid-state three-axis fiber optic gyroscope, three-axis quartz flexible accelerometer, body structure, data interface board and other components.

Features

It does not rely on external signals such as GPS/BDS and base stations. It can work independently in underground, underwaterand GPS-denied environments, providing continuous angular velocity and linear velocity data.
No wearing parts, long service life and high reliability
Fast dynamic response, suitable for complex motion scenarios
Wide temperature range operation: -50℃ to +80℃. Suitable for extreme temperature and humidity scenarios such as polar regions, upper air, and deserts, without performance degradation
Small in size, light in weight, and easy to integrate

Applications

Communication satellite antenna pointing
Underwater robots (ROV/AUV), underwater cleaning equipment
The primary/backup inertial navigation systems for helicopters (rescue, mapping, transportation types), suitable for low-altitude flights and mountain rescue scenarios
Coal seam mining, underground mining equipment for non-ferrous metal mines
Geographic information mapping, such as urban topographic mapping and farmland water conservancy mapping
Subway tunnel boring machine (TBM)
Medium and large-sized civilian unmanned aircraft

Specifications

Gyroscope:

No.	Item	Unit	Parameter
1	Measuring range	º/s	-500~+500
2	Bias stability (1σ 10s)	º/h	≤0.1
3	Bias stability(1σ 100s)	º/h	≤0.035
4	Bias repeatability	º/h	≤0.1
5	Random walk coefficient	º/√h	≤ 0.01
6	Scale factor non-linearity	ppm	≤50
7	Scale factor repeatability	ppm	≤ 50
8	Scale factor asymmetry	ppm	≤ 50
9	Bandwidth	Hz	≥500

Accelerometer:

No.	Item	Unit	Parameter
1	Range	g	±50
2	Threshold/Resolution	μg	5
3	Bias	mg	≤ (±5)
4	0g 4 Hours short time stability	μg	≤30
5	1g 4Hours short time stability	μg	≤30
6	Bias repeatability	μg	≤40
7	Scale factor	mA/g	1.3±0.2
8	Class II non-linearity	μg /g²	≤ (±30)
9	Scale factor repeatability	ppm	≤50
10	Class II non-linearity repeatability	μg /g²	≤ (±30)
11	Noise (840ΩSampling resistor)	mv	≤8.4
12	Bandwidth	Hz	800~2500Hz

IMU:

No.	Item	Unit	Parameter
1	Dimensions	mm	100×100×75
2	Operating temperature	℃	-50~+80
3	Data output rate	Hz	200
4	Data update rate	Hz	1~1000 （Adjustable）
5	Weight	Kg	1.0±0.06
6	Power supply	V	28
7	Communication interface	/	RS-422 (Customizable)

Data update frequency: Adjustable from 1 to 1000Hz

Byte	Data Content	Supplementary explanation
1~4	Head	0X EB8055AA
5~8	X Gyro data	Low first, then high, dimensionless numerical quantity
9~12	Y Gyro data	Low first, then high, dimensionless numerical quantity
13~16	Z Gyro data	Low first, then high, dimensionless numerical quantity
17~20	X Accl data	Low first, then high, dimensionless numerical quantity
21~24	Y Accl data	Low first, then high, dimensionless numerical quantity
25~28	Z Accl data	Low first, then high, dimensionless numerical quantity
29~30	Temperature	Low first, then high
31~33	End	0X 00FF34