High Accuracy MEMS IMU
Introduction
The MEMS can measure the angular rate information of pitch, roll and heading in real time and output it to the users.
A MEMS IMU sensor, gyroscope and accelerometer composed of MEMS gyroscope, MEMS accelerometer and magnetometer constitute the core components of the inertial navigation system. Through the built-in accelerometer and gyroscope, the IMU can measure linear acceleration and rotational angular velocity in three directions, and obtain the attitude, velocity and displacement information of the carriers.
IMU is mostly used in motion control equipment, such as vehicles and robots, and can also be used on occasions that require the use of attitude calculation for accurate displacement, such as inertial navigation equipment for submarines, aircraft, missiles and spacecraft. Compared with other navigation equipment, the inertial navigation system also has the important characteristics of comprehensive information, complete autonomy, strong concealment, real-time continuous information, free from time, geographical restrictions and human factors, which make it suitable for air, water, and underground work normally in the environment.
Specifications
| Gyroscype | ||
| Measurement Range（°/s） | X | ±2880 |
| Y | ±200 | |
| Z | ±200 | |
| Zero-bias(°/s) | X | ≤0.05 |
| Y、Z | ≤0.1 | |
| Non-linearity（%FS） | X | ≤0.1 |
| Resolution（°/s） | X | ≤0.05 |
| Y、Z | ≤0.01 | |
| Bandwidth（-3dB）(Hz) | X | ＞50 |
| Y、Z | ＞50 | |
| Output noise（°/s√Hz） | X | ≤0.15 |
| Y、Z | ≤0.01 | |
| Zero-bias stability（°/s） | X | ≤0.05（1σ） |
| Y、Z | ≤0.01（1σ） | |
| Zero bias temperature drift（°/s） | X | ≤0.05 |
| Cross coupling（%FS） | _ | ≤1 |
| Accelerometer | ||
| Measurement Range (g) | X | ±100 |
| Y | ±10 | |
| Z | ±10 | |
| Zero offset (g) | X | ≤0.3 |
| Y、Z | ≤0.005 | |
| Non-linearity（%FS） | X | ≤2 |
| ≤0.2 | ||
| Y、Z | ≤0.2 | |
| Resolution（mg,rms） | X | ≤150 |
| ≤1 | ||
| Y、Z | ≤1 | |
| Bandwidth（-3dB）(Hz) | X | ＞50 |
| Y、Z | ＞50 | |
| Output noise（mg√Hz） | X | ＜20 |
| ＜1 | ||
| Y、Z | ＜1 | |
| Zero-bias stability (g) | X | ≤60 |
| ≤1 | ||
| Y、Z | ≤1 | |
| Cross coupling（%FS） | _ | ＜1 |
| Magnetometer | ||
| Measurement range（gauss） | X、Y、Z | 3 |
| Zero offset(gauss） | X、Y、Z | ≤0.4 |
| Non-linearity(%FS) | X、Y、Z | ≤1 |
| Bandwidth(-3dB)(Hz) | X、Y、Z | ＞500 |
| Output noise (mgauss/√Hz) | X、Y、Z | ≤1 |
| Zero bias tempearature drift (mgauss/℃) | X、Y、Z | ≤5 |
| Cross coupling(%FS) | _ | ≤1 |
| Interface features | |
| Interface type | RS-422 |
| Data format | 8 data bits, 1 start bit, 1stop bit, no parity |
| Baud rate | 460800bps |
| Data updating rate | ≥1000Hz |
| Operating mode | IMU active upload |
| Synchronization pulse | |
| High level | 3.3V±0.2V |
| Low level | 0V±0.2V |
| Trigger mode | Rising edge trigger |
| Environmental characteristics | |
| Operating temperature | -40℃~+70℃ |
| Storage temperature | -45℃~+80℃ |
| Vibration (g) | 10g，X/Y/Z three directions，each axis 5min |
| Impact (g) | 2000g, 0.5ms |
| Electrical specifications | |
| Input voltage | 12VDC, ripple<20mV |
| Input current | ＜100mA |
| Physical characteristics | |
| Dimensions | 55*55*29mm |
| Weight | ＜150g |
Interface definition
Connector type: J63A-232-009-161-TH
| Wire lead NO. | Signal definition | Details |
| 1 | VCC | VCC |
| 2 | GND | GND |
| 3 | Y | RS422 send + |
| 4 | Z | RS422 send – |
| 5 | A | RS422 receive + |
| 6 | B | RS422 receive – |
| 7 | SYNC | Synchronous pulse reception |
Application Techniques
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