This webpage contains an introduction to sensor data and sensor processing including a bunch of interactive sensor processing examples. It is primarily intended for students on the COMP4014 Designing Sensor-Based Systems course at Nottingham University School of Computer Science.
Any questions, email Joe Marshall.
Introduction to Web Python
The sensor processing examples on here use web based python scripts. These run in your web browser thanks to the pyodide project. In this section we will discuss this stuff, the coursework, and how you should use web python in your coursework.
The GrovePI board and sensors
We use the grovepi board with custom software in the labs (and to do coursework 2). This section introduces the grovepi and the various sensors we have for it.
Lab Worksheet - Introduction to Grovepi
What is a Sensor
These pages introduce you to what a sensor is, you need to know this before you can work with them in any principled way.
Characterizing Sensors
In the previous section we learnt that sensors respond to physical properties in the real world, rather than simply giving you the value of that property. In this section, we will look at how we can understand and characterize that response.
Limitations of analog to digital conversion
Filtering and processing sensor data
Sensor data is dirrrty. How do we get a cleaner measurement of what we want to understand about the world? Find out in this exciting multi-part series on data filtering!
Approaches to making sensor data usable
Linear filtering of numerical data
The delights of non-linear filters
Combining Sensors
Each type or placement of sensor has advantages and disadvantages over the range of possible situations we are sensing. By combining two or more sensors it may be possible to get improved results, as each sensor compensates for weaknesses in the other sensors.
Combining Sensors and making inferences - Intro
Why we might combine multiple sensors
Testing Sensor Algorithms
How well does my system work? Did the change I made to my algorithm improve it or make it worse? Is my system better than your system? In this section, we will talk through ways to answer these questions through testing. Do make sure you read this section, it is really important in terms of how you actually build things…
The role of testing in a sensor development workflow
Machine learning for sensor processing
Why use machine learning for sensor processing?
Types of Machine Learning for Sensor Processing
Some sensor processing using machine learning