North Seeking MEMS Inertial Measurement Unit

ER-MIMU-181
1.Gyro bias instability: <0.02 deg/hr;
2.Gyro bias stability(10s 1σ): <0.1 deg/hr;
3.Low cost.

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Introduction

North Seeking MEMS Inertial Measurement Unit

Introduction
IMU (Inertial Measurement Unit, Short for IMU) is a device that measures the three-axis attitude angle (or angular velocity) and acceleration of an object. Gyroscope and accelerometer are the core equipment of inertial navigation system (INS).Through the built-in accelerometer and gyroscope, the IMU can measure the linear acceleration and rotational angular velocity from three directions, and obtain the attitude, velocity and displacement information of the carrier through analysis.

The ER-MIMU-181 uses high-quality, highly reliable MEMS accelerometers and gyroscopes. It features high-precision gyroscopes in X, Y, and Z axes, and high-precision accelerometers in X, Y, and Z axes.

Feature
Gyro bias instability: <0.02 deg/hr
Gyro bias stability(10s 1σ): <0.1 deg/hr
Gyro angle random walk: <0.005 °/√h
Accelerometer bias repeatability: 100ug
Accelerometer bias stability(10s)(1σ): <50ug
Accelerometer Class II non-linearity: <100ug/g²

Application
High precision north finder
Direction pointing and tracking in satellite antennas and target tracking systems
North finder in logging/geodetic tools
Pointing, steering and guidance in advanced mining/drilling equipment
Initial alignment in a drone launch system
Precision platform attitude measurement and control
Accurate attitude and position measurement for navigation-grade MEMS IMU/INS
North finding and positioning in Land surveying/Land moving mapping systems

Specification

Project	Parameter			Unit
Gyroscopic performance	A	B	C	/
Range	50	100	200	deg/s
Scale factor(25°C)	160000	80000	40000	LSB/deg/s
Scale factor repeatability (1σ)	<50	<50	<100	ppm
Scale factor temperature drift (1σ)	±300	±300	±300	ppm
Scale factor non-linearity (1σ)	<200	<200	<300	ppm
Bias instability (1σ at 25°C)	<0.01	<0.02	<0.02	deg/hr
Bias stability (10s at 1σ)	<0.05	<0.1	<0.1	deg/hr
Angle random walk	<0.0025	<0.005	<0.005	°/√h
Bias repeatability (1σ at 25°C)	<0.1	<0.1	<0.1	deg/hr
Accelerometer
Range	30			g
Bias stability (10s 1σ)	<50			ug
Bias monthly repeatability (1σ)	100			ug
Bias temperature coefficient	<20			ug/℃
Bias temperature hysteresis	<1.5			mg
Scale factor non-linearity	<500			ppm
Scale factor monthly repeatability	<30			ppm
Scale factor temperature coefficient	10			ppm/℃
Scale factor Class Ⅱ non-linearity coefficient	<100			ug/g²
Scale factor	250000			Lsb/g