IMU-4A dual-antenna GPS/INS integrated navigation system

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Description

Introduction

The IMU-4A is a robust dual-antenna GPS/INS integrated navigation system. It delivers real-time, high-precision attitude, heading, position, and velocity data through an embedded Kalman filtering algorithm.
Ideal for demanding applications in automotive, rail, marine, and autonomous systems, it combines reliable performance with independently developed technology and lifetime support.

Application:

High-speed Train Measurement & Control System

Industrial Park Autonomous Vehicles

Surveying POS Systems

Ships and Marine Engineering

Features

1.Dual-Antenna Deep Fusion: Ensures continuous all-weather high-precision heading and positioning
2.Full-Parameter Output: Real-time attitude, heading, 3D position/velocity, and raw inertial data
3.Multi-Scenario Support: Compatible with vehicles, rails, ships, autonomous platforms, and surveying
4.Industrial Reliability: IP-rated, wide-temperature design, resistant to vibration and shock

Enclosure Dimensions: L120×W120×H55mm(4 × M5 Screws)

Antenna Dimensions: Ø152×H175mm
Strong Magnetic Base for Magnetic Mounting

Pin Definition:

Interface definition

Pin	Definition	Description	Pin	Definition	Description
1	VCC 12~36V	Power Positive	7	RS232_RXD	RTK Communication
2	GND	Power Negative	8	RS232_TXD	RTK Communication
3	RXD+	RS422 Communication	9	NC	Not Connected
4	RXD-	RS422 Communication	10	NC	Not Connected
5	TXD+	RS422 Communication	11	NC	Not Connected
6	TXD-	RS422 Communication	12	NC	Not Connected

Installation Scenario Illustration

GNSS Dual-Antenna Installation Yaw Compensation Angle Illustration

Parameter

Specification:

IMU-4A		Parameters
System	Roll / Pitch / Heading Measurement Range	Roll ±180°, Pitch ±90°, Heading ±180°
	Roll / Pitch (1σ)	0.2°
	GPS-Denied Accuracy (Vehicle CEP)	Position Drift (1km or 3min)	0.2%With Odometer Integration
		Heading Drift (1min)	0.15°
Gyroscope	Range	300°/s
	Bias Instability (Allan Variance)	10°/h
	Bias Stability (1s Smoothing)	15°/h
	Bias Repeatability	15°/h
	Full-Temperature Bias	0.1°/s
	Scale Factor Nonlinearity	200ppm
	Scale Factor Repeatability	200ppm
	Resolution	<0.01°/s
	Acceleration Sensitivity	<0.0028°/s/g，rms per axis
	Angular Random Walk	0.15°/√hr
	Bandwidth	200Hz
	Latency	<2ms
Accelerometer	Range	4g
	Bias Stability	0.2mg
	Full-Temperature Bias	1.7mg
	Scale Factor Repeatability	200ppm
	Resolution	0.1mg
	Nonlinearity	0.1%
	Bandwidth	200Hz
Navigation board/card	Position (CEP)	1.2m, 2cm+1ppm (RTK)
	Velocity (1σ)	0.03 m/s
	Heading (1σ)	0.08° (2m baseline)
	Frequency Band	GPS L1, L2, L2C, BeiDou B1, B2
Electrical interface	Input Voltage	VCC 12~36V
	Operating Current	0.55A
	Interface Type	12-pin Aviation Connector
Product list	Main Unit (1 pc)	Dimensions L120×W120×H55mm Weight ≤900g
	Main Unit Cable (1 pc)	Length ~1m Weight ≤170g
	Satellite Antennas (2 pcs)	Dimensions Ø152×H175mm Weight ≤1050g
	Antenna Cables (2 pcs)	Length ~10m Weight ≤425g
	USB-to-Serial Converter (1 pc)	Length ~1m Weight ≤70g