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Introduction FSS-IMU618 is a 6-DOF MEMS Inertial Sensor module made by Forsense.
Volume 23.7 x 23.7 x 9.9mm
Weight 10g
Application field Automatic driving,Precision measurement,Stable platform,Automatic control
Product features High precision, High resolution,Temperature compensation and Independent calibration
Software interface I²C、SPI、Serial port、CAN
Hardware interface 2x10 Double rows of pins
86-15148215714
DetailTechnical IndexDownloadHardware and Structu

1、Product Description

FSS-IMU618 is a MEMS inertial measurement unit (IMU) module with 6 degrees of freedom (DOF) developed by Forsense (Shanghai) Technology Co., Ltd.


It features 3-axis Gyroscopes and 3-axis Accelerometers, measuring angular velocity, linear acceleration, and high-precision attitude angles respectively.


High precision and high resolution combine to help capture subtle vibration and tilt. A large number of output parameters enable the perception of motion despite intense shaking. All IMU modules are calibrated independently on a rotary table and adjusted precisely over an ultra-wide temperature range in a temperature chamber before leaving the factory, so that they can deliver stable and consistent performance in most extreme conditions.


Applications

Autonomous Driving: Vehicle-mounted, Robot, Engineering Vehicle, Underwater.
Precision Measurement: Underground, Tunnel, Vibration, Inclination.
Stable Platforms: Pan-Tilt, Mobile SATCOM with Stable Platform.
Navigation and Control: Auto-Control System, Fixed-Wing Drone


2、Characteristic

Tactical Grade MEMS Gyroscope

Bias Instability: 1.5°/hr

Angle Random Walk: 0.2°/√hr

Temperature Drift: 0.02°/s (-40℃ ~ 85℃, ≤1℃/min @1σ)


Tactical Grade MEMS Accelerometer

Bias Instability: 20μg

Velocity Random Walk: 0.03 m/s/√hr

Temperature Drift: 0.3mg (-40 ~ 85℃, ≤1℃/min @1σ)


Refined temperature compensation

Wide Temperature Range: -40℃ to 85℃

Precise Temperature Calibration


Independent Rotary Table Calibration

Sensitivity, Bias instability, and Misalignment


High-intensity Tolerance

Ultra Shock Resistance: 2000g(0.5ms, Half-sine shock pulse, 3 axis)

Superb Vibration Resistance: 10g(10~2KHz, 3-axis)

Ultra-wide Operating Temperature Range: -40℃ to 85℃

100% Magnetic Shielding


Benefits

Real-time and Flexibility: Configurable output sampling rate up to 1KHz

Digital Interfaces: Serial ports, I²C and SPI

Small Size and Low Weight: 23.7×23.7×9.9 mm, about 10g


Apart from standard performance and output parameters, Forsense also provides customized services, including software development and LOGO design, to improve your products!

Key indicators of Gyroscope

ParametersTest Conditions / RemarksTyp.Unit
Measurement Range
±500°/s
Bias instability@25℃, Allan Variance, 1σ

XY: 2.0

Z: 1.5

°/hr
Bias stabilityGJB, 10s smoothing4.5°/hr
Bias Repeatability
GJB9°/hr
Resolution
0.0054°/s
Misalignment
0.02deg
Internal Low-pass Cutoff FrequencyAdjustable Software47Hz
ODR
400Hz
Measure Delay
7.0ms
Offset Error over Temperature

-40℃~85℃,

≤1℃/min@1σ

0.02°/s
Random Walk X-axis@25℃, Allan Variance, 1σ0.3°/√hr
Random Walk Y-axis0.2°/√hr
Random Walk Z-axis0.2°/√hr
Scale Coefficient Error
2.0
Scale Factor Nonlinear
200ppm

Key indicators of Accelerometer

ParametersTest Conditions / RemarksTyp.Unit
Measurement Range
±6g
Bias instability@25℃, Allan Variance, 1σ20μg
Bias stabilityGJB, 10s smoothing40μg
Bias RepeatabilityGJB0.2mg
Resolution
0.0648mg
Misalignment
0.02deg
Internal Low-pass Cutoff FrequencyAdjustable Software47Hz
ODR
400Hz
Measure Delay
7ms
Offset Error over Temperature

-40℃~85℃,

≤1℃/min@1σ

XY: 0.6

Z: 0.3

mg
Random Walk X-axis@25℃, Allan Variance, 1σ0.03m/s/√hr
Random Walk Y-axis0.03m/s/√hr
Random Walk Z-axis0.04m/s/√hr
Scale Coefficient Error
1.0
Scale Factor Nonlinear
200ppm



FSS-IMU618_V1.0-221013


Mechanical Dimensions (unit: mm)
ch2 图4 IMU 测量中心位置.jpg