超高精度モーションセンシングが可能なMEMS IMU。従来の光ファイバージャイロベースユニットに対抗できる軽量、小型、高信頼性、低コストIMUです。

DMU41は、当社最新の6軸 IMU(HPIMU)です。 従来の「FOGグレード」IMUに代わり得る、画期的、ITAR規制対象外の低価格MEMS IMUです。 DMU41は、その先行機種DMU30の性能と信頼性を継承しております。それに加え、パッケージの小型化と新たなユーザ機能が追加されました。 DMU41は高いSWaP-C特性を誇るIMUで、体積は125cm^3、重さは170g未満、消費電力は2.5W未満です。



DMU41 high performance imu sensor
Supply Voltage4.75V to 32V
Angular Random Walk0.02˚/√hr
Bias Instability0.1°/hr, 0.015mg
Bandwidth (nominal)IMU>77Hz Acc sencor 250Hz Gyro sensor 150Hz
Operating Temperature-40°C to +85°C
Typ. Current Consumption125mA (at 12V)
Angular Rate Range±490˚/s
Axes of Acceleration3
Velocity Random Walk 0.05m/s/√hr
Axes of Angular Rate3
Noise Spectral Density Gyro0.05 °/s rms
Noise Spectral Density Acc0.9 mg rms
Rate SF over Temp-700ppm to +700ppm (over life)
Rate Bias Over Temperature-30°/h to +30°/h (over life)
Acc Bias over Temp-7mg to +7mg (over life)
Acc SF over Temp-1000ppm to +1000ppm (over life)
Baud Rate115200/ 230400/ 460800/ 921600
Accelerometer Bias Instability15μg 1σ to 30μg Max
Vibration Rectification ErrorAcc: ±0.006°/s/g²rms Gyro: ±0.15mg/g²rms
CAD Files

本サイトに掲載されている3Dファイルは、公称寸法を使用した表示のみのために提供されています。 当社の Web サイトに掲載されているシリコン センシング製品の実際の寸法を正確に表すものではありません。 製品(寸法を含む)が特定の用途に適しているかどうかを判断するのは、あくまでもお客様ご自身です。

Example CAD Files
Please explain DMU41's Delta Theta and Delta Velocity outputs

The basic inertial data output from DMU41 is angular rate (deg/s) and acceleration (g). Delta Theta and Delta Velocity outputs can be considered as a re-scaling of these basic data outputs. Provision and use of these values is an industry standard expected and used by many of our customers.

Delta Theta is in degrees and represents the degrees rotated over the sampling time of 5.0ms (or 1/200th of a second). For example, if the IMU axis is rotating at 200deg/s, Delta Theta will be 1 deg.

Similarly, Delta Velocity is a re-scaling from g to m/s, representing the change in velocity change over the same 5ms. The output in m/s is equal to the acceleration in g multiplied by 0.04903325 (divide by 200 and multiply by 9.80665, the latter being a universal measure of g).

What is the resolution of sensor data inside DMU41?

24-bit sigma delta analogue to digital convertors are used within DMU41. Compensation is carried out using single precision floating point mathematics. The DMU41 output message is also output as single precision floating point numbers. So, the mathematical resolution is very small indeed.

In practical terms, the minimum resolvable change is dominated by the sensor noise. With averaging, this can be improved to a point where the minimum resolvable change is dictated by the bias instability derived from Allan Deviation plots. For the gyro channels this is below 0.1 deg/hr and for the accelerometers, around 10μg.