The basic architecture of the human activity monitoring
system can be represented with the help of a block diagram;
the simplest one is shown in Figure 1. Depending on the task
of monitoring, different types of sensors are used. The raw
data from sensors are collected by a processor. The data are
processed and then displayed on a display. These types of
simple wearable devices are used by normal people while
jogging, running and other applications where the users look
at the display to notice the measured values of the sensors.
If the device has the feature of wireless data transmitting
capability, the data can be sent to a central station through
a transceiver. The block diagram representation of a simple
wearable wireless device is shown in Figure 2. The data
may or may not be completely processed at the sensing end
but most of the data are stored, processed in the computer