價格：免費
更新日期：2017-10-28
檔案大小：831k
目前版本：1.00
版本需求：Android 3.0 以上版本
官方網站：http://www.keuwl.com/apps.html
Email：developer@keuwl.com
聯絡地址：隱私權政策
Measures displacement by double integrating the acceleration from your device's linear acceleration sensor.
Any drift or error in the accelerometer and/or other sensor readings is quickly magnified in the double integral, such that even a stationary device will quickly show displacement readings going wild. Therefore this App is for measuring alternating displacements. i.e we apply a drift reduction algorithm to remove any DC component and then measure the AC displacement by means of a Root Mean Square (RMS) value, or perform a Fast Fourier Transform (FFT) to obtain the frequency spectrum.
• Gauge to show the RMS displacement in the X,Y or Z directions, or its magnitude.
• RMS graph to show the gauge readings over time.
• Lower display shows time series data or a FFT from it.
• Peak indicators for the frequency spectrum.
• Save graph data to file.
• Units of cm, mm, m, inches or feet.
An example: Move the device in a circle along two of its axis. You should see two sinusoidal traces 90 degrees out of phase in the time series graph, determine the rotation frequency in the frequency spectrum and obtain an estimate of the diameter of the circle from the gauge or its corresponding graph (when set to peak to peak mode in settings).
Linear acceleration sensors will vary in sampling speed, resolution and accuracy from one device to the next. For indication only.
