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Viewing the IMU Data
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2
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-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐ Data File Created By Ac1Graph Link IMU 9DOF Sensor Ac1Life v6.11.5 Firmware v1.0.0 date format M/d/yyyy at 100 Hz -‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐
Serial Number: TAS1C32140060
Start Time 09:25:59
Start Date 11/4/2014
Epoch Period (hh:mm:ss) 00:00:00
About the IMU file
Download Time 15:46:48
The IMU file will contain some or all of the following information based on the IMU selections made during
Download Date 11/4/2014
initialization. The sample rate of the IMU file is fixed at 100 Hz.
Current Memory Address: 0
Current BaYery Voltage: 4.03 Mode = 12
-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐
Timestamp
2014-‐11-‐04T09:25:59.0000000
2014-‐11-‐04T09:25:59.0100000
2014-‐11-‐04T09:25:59.0200000
2014-‐11-‐04T09:25:59.0300000
2014-‐11-‐04T09:25:59.0400000
2014-‐11-‐04T09:25:59.0500000
2014-‐11-‐04T09:25:59.0600000
2014-‐11-‐04T09:25:59.0700000
2014-‐11-‐04T09:25:59.0800000
2014-‐11-‐04T09:25:59.0900000
2014-‐11-‐04T09:25:59.1000000
2014-‐11-‐04T09:25:59.1100000
2014-‐11-‐04T09:25:59.1200000
2014-‐11-‐04T09:25:59.1300000
2014-‐11-‐04T09:25:59.1400000
2014-‐11-‐04T09:25:59.1500000
2014-‐11-‐04T09:25:59.1600000
2014-‐11-‐04T09:25:59.1700000
2014-‐11-‐04T09:25:59.1800000
Note: The accelerometer data in the IMU file is not from the primary accelerometer and is not used for scoring in ActiLife.
14
After completing the download, select File > Import/Export/Convert > IMU in the ActiLife task bar.
Select the raw (.gt3x) file from the list and click 'Open. '
A status bar will appear while ActiLife converts the raw file to CSV. Once completed, the file location window
will open and the IMU file will appear in the list.
Accelerometer X
Accelerometer Y
0.418945
0.441406
-‐0.554688
0.475586
-‐0.530273
0.48584
-‐0.477539
0.439453
-‐0.373535
0.289551
-‐0.293945
0.225098
-‐0.227539
0.270996
-‐0.169922
0.330566
-‐0.135254
0.373535
-‐0.094727
0.461426
Timestamp
0.375977
-‐0.105957
The timestamps shown in the exported .csv file are formatted to show the full date in YYYY-MM-DD
-‐0.36084
-‐0.111328
format. The "T" symbol indicates the beginning of the time element for the timestamp. The time is
-‐0.378418
-‐0.197754
-‐0.203613
-‐0.334473
formatted as hh:mm:ss.ss where the last "ss" represents the fractional portion of the timestamp. Each
0.030273
-‐0.541016
entry increments by 0.01 seconds (because of the 100Hz fixed sample rate)
0.270996
-‐0.837402
0.520508
-‐1.158691
Accelerometer X, Y, Z
Each accelerometer entry represents instantaneous acceleration for the axis indicated in units of gravity
(Gs). Device orientation is shown
The accelerometer on the IMU has a dynamic range of +/- 16Gs per axis
Gyroscope X, Y, Z
Gyroscope measurements from the IMU represent are presented in degrees/sec for each axis. Refer to
this help article
for details regarding roll/pitch/yaw orientation.
Magnetometer X, Y, Z
The IMU magnetometer readings represent the magnetic field experienced by the Link device and are
useful for discerning directional orientation (compass). These readings are in microTesla (µT)
IMU Temperature
The IMU temperature reading indicates ambient temperature inside of the Link activity monitor and is
indicated in degrees Celsius (C).
Accelerometer Z T emperature
Gyroscope X
-‐0.60791
0.327637
63.016354
0.32666
63.726211
0.333496
63.78312
0.293945
63.768144
0.26709
63.768144
0.527344
63.759158
0.425781
63.753168
0.38623
63.768144
0.400879
63.759158
0.436035
63.774134
0.037109
0.38623
63.759158
0.137695
-‐0.008789
63.750173
0.005859
0.072266
63.759158
0.587402
63.753168
0.773438
63.741187
0.708984
63.747178
0.594238
63.747178
0.657715
63.735197
0.774414
63.750173
in this help
article.
Gyroscope Y
Gyroscope Z
69.763188
-‐28.564455
13.977052
51.635745
-‐48.828128
9.216309
34.790041
-‐74.157719
3.90625
31.127932
-‐94.421392
-‐2.624512
33.447268
-‐97.10694
-‐11.413575
49.56055
-‐54.382328
-‐16.967774
83.190923
-‐15.502931
-‐2.685547
102.050787
-‐10.864258
21.240236
114.807136
1.831055
39.489749
134.948739
-‐2.563477
46.691897
161.315928
-‐18.005372
38.33008
169.494639
-‐52.917484
-‐1.708984
111.206061
-‐152.160654
-‐39.367678
56.823734
-‐177.978526
-‐14.709474
73.974614
-‐125.244148
47.66846
102.600104
-‐76.477055
118.835456
92.041021
-‐49.926761
173.034679
47.119144
-‐62.744144
197.509778
4.821778
-‐100.036627
196.777356
actigraphcorp.com
Magnetometer XMagnetometer Y Magnetometer Z
27.246092
9.667968 15.234374
27.246092
9.667968 15.234374
27.246092
9.667968 15.234374
27.246092
9.667968 15.234374
27.246092
9.667968 15.234374
27.246092
9.667968 15.234374
27.246092
9.667968 15.234374
27.246092
9.667968 15.234374
27.246092
9.667968 15.234374
27.246092
9.667968 15.234374
27.246092
9.667968 15.234374
27.246092
9.667968 15.234374
27.246092
9.667968 15.234374
22.705077
13.037109 21.240233
22.705077
13.037109 21.240233
22.705077
13.037109 21.240233
22.705077
13.037109 21.240233
22.705077
13.037109 21.240233
22.705077
13.037109 21.240233
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