and extensive display is possible either in a graphical format
and/or as a numerical value. Depending on the complexity, the
results may be available through an access of a website from
a remote place. The block diagram representation of a devel-
oped physiological monitoring system is shown in figure 3.
The monitoring system may consists of many sensors to
measure physiological parameters such as body temperature,
heart-rate etc. The picture of the actual developed wearable
physiological monitoring system is shown in figure 4 [4], [18].
The system consists of temperature sensor to measure the skin
temperature, heart-rate sensor as well as accelerometers to
detect any fall that may occur. All the measured physiological
data are collected by a microcontroller to process and analyze.
Based on the processed data the central controller may either
generate a warning message to the caregiver based on the
current physiological situation of the person being monitored
and/or may help to detect early disease and any possible health
threat [19].
III. SENSORS FOR HUMAN ACTIVITY MONITORING
In this section we will review a few sensors which are
commonly used for monitoring different human activities.
Sensors are fundamental elements of the whole monitoring
system and should measure the physiological parameters
of interest accurately and reliably over a long duration.
The rapid development of microelectronics, micromechanics,
integrated optics and other related technologies has enabled
the development of various kinds of smart sensors to sense
and measure data more efficiently and faster, with lower
energy consumption and less processing resources.
Body temperature is one of the common physiological
parameters measured by wearable sensors for human activity