Activinsights GENEActiv Kullanım Kılavuzu - Sayfa 15

Fitness Ekipmanları Activinsights GENEActiv için çevrimiçi göz atın veya pdf Kullanım Kılavuzu indirin. Activinsights GENEActiv 20 sayfaları.

ii). Understanding .bin files

The .bin file output when opened will display as the following:

Main header (lines 1 to 59)

Pages of 300 measurements (lines 60 to 72, 73 to 85 etc)

Each page will have a sub header (e.g. lines 61 to 68)

Data block (e.g. lines 69 to 72)

The time span of a page is dependent on the measurement frequency. Each measurement consists

of 3 axis of acceleration, a light measurement, and the button status. In the page header, the battery

voltage and the temperature are recorded as well as some of the basic set-up information.

The time stamp of the page corresponds to the first measurement of the page. The first 300

measurements block of the hexadecimal data starts on line 69 of the file. This is a sequential stream

of 6-byte data blocks, starting at the timestamp in the page header.

a 12 bits

accelerometer x axis (+/- 2048)*

b 12 bits

accelerometer y axis (+/- 2048)*

c 12 bits

accelerometer z axis (+/- 2048)*

d 10 bits

light meter (0-1024)*

e 1 bit

button status (1 on / 0 off)

f 1 bit

reserved (set to zero)

The GENEActiv device stores raw data to allow all processing to be completed off-line. Calibration data

is created in production and recorded to be applied in post-processing.

Accelerometer x, y & z axis: calibrated measurement = (output*100 - offset) / gain (g)

Light meter: calibrated measurement = output * lux / volts (lux)

2-3

7 6 5 4 3 2 1 0

5-100