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.

Showing demo data

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

Operation	Desc.
Right part of the [(I)ID#] button	Switch IDs with each click. (Note: For continuous sample data in FIFO mode, operation with multiple IDs is not practical.
Right part [(f)SMP#] button	Change the frequency analysis size to 64, 128, or 256 with each click.
right part [[>PAUSE( )] button	aborts display update (sample acquisition is performed until the internal temporary sample buffer is full)
right part [(c)SAVE DISPLAYED DATA] button	output data in CSV format (log folder). Outputs data from the sample displayed on the rightmost side of the screen to the oldest sample in the buffer. The number of output is always 5120, and the sample displayed on the rightmost side of the screen is the last data.
Mouse drag (graph section)	Move the position of the displayed sample
Mouse drag (bottom scroll bar)	Move the position of the displayed sample (in larger steps)
Cursor→, ←	Move sample display
Cursor↑, ↓	Zoom in/out on the sample horizontal axis (Equal, 2x, 3x, 4x; for 256 analysis samples, 2x). (Equal, 2x, 3x, 4x, up to 2x if the number of samples is 256)

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).

Label	Item	Desc.
#	Sample number
T_PKT[ms]	Packet reception time	Since one packet contains multiple samples, samples with the same timestamp are lined up.
SEQ	Packet Sequence Number	Packets are assigned and if they are consecutive, there is no missing packet.
T_SMPL[ms]	Sample time (virtual or estimated)	Timestamp of each sample generated from the packet reception time. It does not match the actual time the sample was taken. (The error is large because the sample rate is estimated from the received packet interval, and the timestamp is one packet period later than the actual sample time because the sample period is calculated by adding the sample period to the received sample.
X[G]	Sample value on the X-axis	Based on the value from the sensor, the unit is [G].
Y[G]	sample value of Y axis	based on the value from the sensor, unit is [G].
Z[G]	sample value of Z-axis	based on the value from the sensor, unit is [G].
FD#	Number of the frequency analysis calculated value	If the number of frequency analysis samples is 64, they are ordered in the order of DC,1,2,...,31. ,31` if the number of frequency analysis samples is 64.
Hz	Frequency axis value of the frequency analysis calculation result	Approximate frequency. The frequency is calculated by (FD# / FD_Len) * FD_Freq.
X	Frequency analysis calculated value of X-axis
Y	Frequency analysis calculated value of Y-axis
X	X-axis frequency analysis calculated value
Label	additional information name	see table below
Info	additional information	see table below
Label	Additional Information	Refer to the table below

Additional Information

Label	Item	Desc.
ModuleSID	Serial number of the sending side
Tick[ms]	System on TWELITE STAGE app side at log file open [ms]
Date	Date when log file was opened	Time
Time	Time_Msec_part	Time when log file was opened
Time_Msec_part	Less-than-seconds portion of log file open [ms]
Samples	Valid sample data
FD_Len	Number of frequency analysis samples
FD_Start#	Frequency analysis start sample number
FD_Freq	Frequency estimate of frequency analysis range [Hz]	Estimated value from sample reception interval
		FD_Freq

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.

Label	Item	Desc.
#	Sample number
T_PKT[ms]	Packet reception time	Since one packet contains multiple samples, samples with the same timestamp are lined up.
SEQ	Packet Sequence Number	Packets are assigned and if they are consecutive, there is no missing packet.
T_SMPL[ms]	Sample time (virtual or estimated)	Timestamp of each sample generated from the packet reception time. It does not match the actual time the sample was taken. (The error is large because the sample rate is estimated from the received packet interval, and the timestamp is one packet period later than the actual sample time because the sample period is calculated by adding the sample period to the received sample.
X[G]	Sample value on the X-axis	Based on the value from the sensor, the unit is [G].
Y[G]	sample value of Y axis	based on the value from the sensor, unit is [G].
Z[G]	sample value of Z-axis	based on the value from the sensor, unit is [G].
Label	Additional information name	Refer to the following table
Info	Additional Information	Refer to the table below

Additional Information

Label	Item	Desc.
ModuleSID	Serial number of the sending side
Tick[ms]	System on TWELITE STAGE app side at log file open [ms]
Date	Date when log file was opened
Time	Time_Msec_part	Time when log file was opened
Time_Msec_part	Less-than-second part of log file open [ms]