Acceleration realtime graph
Acceleration real-time graph
Windows macOS Linux RasPi
Used for the purpose of referencing sample data from TWELITE CUE and TWELITE MOTION SENSE PAL.
Note: The Sensor Graph Function records one packet as one sample, even when continuous measurement is performed such that multiple samples are included in one packet.
CUE mode, MOT mode, and 2525 FIFO mode.
When the number of consecutive samples exceeds a certain number (analysis window), the XYZ axis is displayed with frequency analysis. However, in 2525 FIFO mode, it is always assumed to be continuous.
When a packet is explicitly delimited (when more than 3 seconds have elapsed since the previous packet, every packet in CUE mode, or when the sequence number of packets becomes discontinuous in MOT mode), a dummy of 4 samples is (When more than 3 seconds have elapsed since the last packet.
Data is stored for up to 4 nodes in order of arrival first.
During multi-node operation, communication failures often occur due to mutual packet collisions. In particular, in FIFO mode, the transmission cycle is almost constant, and packets are attempted to be sent at almost the same time to each other, resulting in transmission failures due to interference, which may continue for a long time. In principle, one node per CHANNEL should be used.
Typical CUE Interactive settings mode settings
measure continuously at about 25 Hz. (Transmit Interval:
0, Sensor Parameter:03000000)measure continuously at about 50 Hz. (Transmit Interval:
0, Sensor Parameter:03000100)measure continuously at about 100 Hz. (Transmit Interval:
0, Sensor Parameter:03000200)measure 128 samples at about 100Hz about every 10 seconds. (Transmit Interval:
10, Sensor Parameter:03000208)measure 256 samples at about 100Hz about every 10 seconds. (Transmit Interval:
10, Sensor Parameter:03000210)measure 64 samples at about 50Hz every 10 seconds. (Transmit Interval:
10, Sensor Parameter:03000104)measure 128 samples at about 200Hz about every 10 seconds. (Transmit Interval:
10, Sensor Parameter:03000308)
Operation
Sample Rate Estimation
The sampling rate is calculated from the packet reception time. Since the reception time of multiple past samples is averaged to obtain one sample, the error will be larger if there are packet skips, etc.
After the sample rate is estimated, the graph display scrolls smoothly.
The timestamp of the related log record (T_SMPL) is also estimated in the same way, and the timestamp is after the time of packet acquisition.
Open at startup of CUE graph mode.
Specify 31 in [STAGE Common Settings→Designate Startup Application].
Log Output (Data Save)
By clicking the [Data Save] button, data for up to 512 samples will be output starting from the display position on the screen (rightmost sample). Note that the most recent sample comes last, so there may be no data at the beginning.
The log file name is
log folder/accel_{serial number}_{time stamp}.csv.The most recent sample on the right end is the 512th data (at the end of the file).
When frequency analysis is performed, the number of frequency analysis samples is the number of frequency analysis samples from the last sample.
The frequency analysis results are added to the line where the sample subject to frequency analysis is recorded (in the case of 64 samples, the 32nd line from the 449th sample is the result, from DC component to high frequency component).
Additional Information
Log output (auto save)
When this screen is opened and data is entered, a log file is automatically output.
The log file name is
log folder/accel_{serial number}_{time stamp}.csv.While the screen is open, the file is being written out. It may not be opened for reading, or even if it is opened, all data may not be read.
Additional Information
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