In this, is the latest iteration of the hand-wash logging prototype, I have added four switches. As a registered nurse and ambulance officer I know from first-hand experience how we all hate filling in paperwork. This embedded logger records the date time and duration of a hand-wash event. Although it works very well, I realised I don’t know who is doing the hand-washing. To remedy this I have fitted four switches to the prototype. Each switch represents a category of health worker, namely: nurse, allied health, doctor and other. I will have a stick-on membrane matrix switch strip on the sink for the health worker to push before or during a hand-wash event.
A video of the upgraded logger can be found here: https://youtu.be/mCwyqt1lMmo
The picture below is a mock-up of a hand wash sink at our local hospital with the water proof membrane switch and piezo electric transducer in place.
The logger generates a .csv file that can be imported into Excel.
Here is a short movie which demonstrates the operation of the hand-washing logger.
Bumps at the sink (false positives) show up on the LCD but are not written to the SD card. The Arduino can differentiate between a bump and a hand-washing event.
Here is a picture of the basic operation of the logger.
Hi, my hand washing event logger is now a working prototype. When I worked as a nurse in a medical unit a person was employed to stand and record hand washing events with a clip board. My device uses a piezo-electric transducer to provide ‘1s and 0s’ to an Arduino micro processor while water is flowing. The Arduino logs the date/time and duration of the hand wash event on an SD card.
The LCD shows the last hand wash logged time and duration. The picture below is a screen shot of the time, day, month and duration being logged on the SD card.
The aim of the project is to provide hand washing data collection using embedded technology. It doesn’t look very embedded at the moment! It is sitting on our kitchen bench logging sink events. Hopefully it will form the basis of a study in a hospital.