High precision MEMS Terminal | B684-D_Terminal_Inertial Combination_Product Center

High precision MEMS Terminal | B684-D

Full constellation multi-frequency high-precision integrated navigation

High-precisionHigh dynamicHigh integrityHigh scalability

B684-D high-precision MEMS integrated navigation system, built-in constellation multi-frequency GNSS module, high-performance gyroscope and accelerometer, adopts the latest self-developed algorithm engine and IMU array technology (IMU Array) to provide high-precision carrier pose information in real time. Support single-antenna positioning, dual-antenna positioning and orientation, support odometer data external assistance, support receiver autonomous integrity early warning function (RAIM), calmly cope with satellite signal occlusion challenges, and well meet the needs of long-term, high-precision, and high-trust navigation applications in complex environments such as urban canyons, overpass tunnels, and underground parking lots.

Features

Integrated 4G full Netcom module, supports single-antenna positioning, dual-antenna positioning and orientation, supports odometer external assistance, easy to use and high work efficiency
Adopt 12nm advanced process full constellation dual-frequency SoC chip, built-in high-performance integrated navigation algorithm and IMU array technology
The design is equipped with the receiver's autonomous integrity early warning function (RAIM), which can warn in time when the error exceeds the limit to ensure the stability and reliability of the positioning results
Support 100Hz data output to meet the needs of high-speed motion carriers such as vehicles and drones
BDS、GPS、Galileo、GLONASS、QZSS，L1、L5 full range signal reception

Product Parameters

Performance		Indicator
Constellations	GPS/BDS/Galileo/GLONASS/QZSS/SBAS
Receive signal	GPS/QZSS: L1C/A, L5 BDS: B1I, B2a Galileo: E1, E5a GLONASS: L1
Sensitivity	Capture: -147dBm Track: -165dBm Re-capture: -159dBm
Positioning accuracy	Single-point positioning（RMS）	Plane: 1.5m Elevation: 2.5m
Positioning accuracy	RTK（RMS）	Plane: 0.8cm + 1ppm Elevation: 1.5cm + 1ppm
Speed accuracy	0.03m/s
1PPS accuracy	20ns
Heading accuracy	0.1°(baseline 1m)
Positioning time	Cold start	12s
	Warm start	5s
	Hot start	1s
Dynamic performance	Height limit	1000m
	Speed limit	300m/s
	Acceleration limit	4g
Output frequency	1 Hz, 10 Hz, 100Hz
Agreement	NMEA0183, RTCM3.X
Interface	RS232×1, CAN×1, 1PPS×1, EVENT×1
Voltage	DC 12V~36V
Power consumption	500mW（12V Typical value）
Working environment	Operating temperature：-40℃~85℃ Storage temperature：-55℃~95℃
Performance of integrated navigation
GNSS signal interruption time	Location mode (Wheelless Speed）	location accuracy（m）		speed accuracy(m/s)
GNSS signal interruption time	Location mode (Wheelless Speed）	Horizontal	vertical	Horizontal	vertical
0s	RTK	0.02	0.03	0.03	0.02
10s	RTK	0.35	0.20	0.05	0.03
60s	RTK	3.50	1.50	0.20	0.10
Internal IMU performance
Device	Parameters	Numerical value	Unit
Gyroscope	Measuring range	±2000	°/s
	Angle random walk	0.4	°/sqrt(hr)
	Zero bias stability	4	°/hr
Accelerometer	Measuring range	±16	g
	Velocity random walk	80	μg/sqrt(hz)
	Zero bias stability	20	μg

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