This diploma thesis illustrates the design and production of a measurement system which measures temperature, heart rate, skin conductivity, hand squeeze force, and the production of the handle with integrated sensors that measure these parameters. Furthermore, this diploma thesis presents also the structure of sensors and principles of sensor operation as well as data capturing and display of acquired data through program code.
At the beginning, we presented the task and capability of the Raspberry Pi, Raspberry Pi to Arduino shield connection bridge and e-Health Platform that play a key role in data capturing and data display. Raspberry Pi is described in most detail because it acts as an ordinary computer but is small in size, consumes little energy and at the same time it can capture and display data and manage program code.
Then it is described how one can connect Raspberry Pi with a personal computer which enables manipulation of the Raspberry Pi by means of a personal computer. One learns also how programs can be started automatically.
What follows is a description of measurement system sensor technology. First, we described the construction and function of the skin conductivity sensor, skin characteristics and facts how emotions reflect on the skin. Then the operation of the skin conductivity sensor is described.
As regards the heart rate sensor, one learns here how heart rate can be measured and what the measurement tells us. The used photoplethysmography method is presented in more detail. This presentation is followed by the presentation of the sensor used – Pulse sensor, its function and structure, and explanation of sensor’s program code.
The subsection on temperature measurement contains description of the methods of temperature measurement, detailed functions and structure of the sensor as well as description of the program code that returns temperature value.
The subsection on force measurement presents the method of hand squeeze force measurement and a detailed function of the sensor.
The whole measurement system is integrated into a 3D printed handle that consists of two cylinder-shaped parts.
In the end there’s a section on handle production which is followed by the conclusion describing system testing and its possible upgrades.