ER-AHRS-7 High Cost Performance AHRS
Introduction
ER-AHRS-7 is a highly reliable and cost-effective 10-axis small attitude reference system/inertial measurement unit. The inertial sensing system integrates industrial grade MEMS three-axis gyroscope, three-axis accelerometer, and three-axis magnetometer and barometer, with excellent filtering and data fusion algorithms. In addition, by calibrating all sensors and configuring special dynamic compensation algorithms, the ER-AHRS-7 is guaranteed to provide accurate attitude and inertial data respectively under demanding conditions.
The ER-AHRS-7 offers a variety of optional configurations of industry standard communication interfaces and a wide input voltage range for easy integration into a variety of systems, while offering small size, low power consumption, and high accuracy. It is the ideal choice for attitude measurement and navigation in most Marine UAV vehicle fields.
Feature
1.High performance MEMS gyroscope with gyroscope bias instability <3°/h.
2.Built-in ultra-low-power, high-performance three-axis digital magnetic sensor with a dynamic field range of ±50 gauss.
3.A new generation of high-resolution altimeter sensors including a high linear pressure sensor and an ultra-low power 24-bit ADC with a height resolution of 10 cm.
4.A variety of data interfaces, easier to install and use, optional configuration RS422/RS232 and CAN.
5.Precision aluminum alloy shell, high reliability, can be widely used in land, aviation, robot control.
Application
Land, sea, drones, robot control and positioning, ships, vehicles, human motion detection, etc.
Product model information
| Item | ER-AHRS-7U | ER-AHRS-7A |
| Angular velocity, acceleration | √ | √ |
| Attitude angle | √ | |
| Relative heading angle | √ | |
| Absolute heading angle | √ |
Technical specification
| Attitude orientation performance | |
| Pitch angle and roll angle accuracy | 1° |
| Absolute heading accuracy | <2° |
| (Roll angle/pitch angle) static drift | 1°/min |
| (Pitch angle/roll angle) measuring range | ±85° |
Sensor parameters
| Gyroscope | ||
| Item | Value | Unit |
| Range | ±125,±500,±1000,±2000 | deg/s |
| Random walk | ≤0.21 | °/ √h |
| Bias instability | ≤3 | °/h |
| Temperature coefficient of angular rate sensitivity | ±70 | ppm/°C |
| Rate noise density | 5 | mdps/√Hz |
| Bandwidth | >100 | Hz |
| Accelerometer | ||
| Item | Value | Unit |
| Range | ±2,±4,±8,±16 | g |
| Linear acceleration sensitivity temperature coefficient | ±100 | ppm/°C |
| Bias | ±80 | mg |
| Bias temperature coefficient | ±0.10 | mg/°C |
| Acceleration noise density | 60 | μg/√Hz |
| Bandwidth | >100 | Hz |
| Barometer | ||
| Item | Value | Unit |
| Range | 10~1200 | mbar |
| Precision(25℃,750mbar) | ±1.5 | mbar |
| Error band,-20℃~+85℃,450~1100mabr | ±2.5 | mbar |
| Operating temperature | -40~+85 | ℃ |
| Long-term stability | ±1 | mbar/year |
| Magnetometer | ||
| Range | ±49.152 | gauss |
| Sensitivity | ±7% | mgauss/ LSB |
| Sensitivity changes with temperature | ±0.03 | %/°C |
| Magnetic sensor varies with temperature shift | ±0.3 | mgauss/ °C |
| Root-mean-square noise | 3 | mgauss (RMS) |
| Operating temperature range | -40~+85 | °C |
| Power supply and interface | ||
| Supply voltage | 5~12V | |
| Power consumption | ≤0.5W | |
| Interface protocol | RS422 or RS232, CAN | |
| Operating temperature | -40℃~+80℃ | |
| Size | 40mm*40mm*24mm | |
| Output data rate | 200HZ | |
Application Techniques
1.Basic Knowledge of Bias Stability of MEMS Gyroscope
2.Classification And Performance Improvement Of MEMS Gyroscope
3.Comparison Of Technical Specifications Of Navigation Grade MEMS Gyroscope
4.MEMS Gyroscope: The Third Generation Of Gyroscopes Is Leading The Way
5.MEMS Gyroscope: Sensitive Structure | Detection Circuit | Integrated Package
6.Research On Segmented North Seeking Orientation Based On MEMS Gyroscope
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