Source-linked AI summary
Advanced tools for smartphone-based experiments: phyphox
Sebastian Staacks, Simon Hütz, Heidrun Heinke, Christoph Stampfer
TL;DR
Smartphone experiments offer cost-effective tools for physics education but can hide measurements and shift difficult data analysis onto computers. phyphox addresses these problems with remote access, in-app analysis, and teacher-customizable procedures. The app can make experiments more accessible while tailoring mathematical demands to different classes and learning situations.
Problem
Smartphone experiments can leave phones inaccessible during measurement and data incomprehensible until computer-based analysis, limiting their classroom potential.
Method
phyphox combines browser-based remote control and real-time data observation with customizable data analysis performed inside the app.
Results
phyphox provides real-time analyzed graphs and can support experiments focused on physical understanding without requiring computer access or advanced mathematical knowledge.
Takeaways & Limitations
Teachers can remove or tailor analysis requirements to the needs of a specific class and learning situation.
Takeaways & Limitations
Android and iOS cannot always provide identical functionality because certain sensors differ in availability and accessibility.
Abstract
from arXiv · showhide
The sensors in modern smartphones are a promising and cost-effective tool for experimentation in physics education, but many experiments face practical problems. Often the phone is inaccessible during the experiment and the data usually needs to be analyzed subsequently on a computer. We address both problems by introducing a new app, called "phyphox", which is specifically designed for utilizing experiments in physics teaching. The app is free and designed to offer the same set of features on Android and iOS.
1. Introduction
Smartphone experiments can motivate physics learning but face two practical obstacles: the phone may be inaccessible during measurement, and the data may require difficult computer-based analysis afterward.
- The phone is often inaccessible during experiments, so students cannot observe data in real time or connect plot features to experimental stages.
- Data may remain incomprehensible until exported to a computer for tasks such as identifying event times or performing numerical integration.
- Either obstacle can reduce the motivation and comprehension gained from smartphone-based experimentation.
- In extreme cases, experiments may become introductions to data analysis rather than ways to discover physical phenomena.
2. The app phyphox
phyphox addresses inaccessible measurements and post-experiment analysis through remote access and in-app analysis, while making the analysis customizable for teachers.
- phyphox provides remote control and observation of real-time experimental data from a second device, while including data analysis within the app.
- Teachers can review and modify each analysis step instead of using a black-box procedure that only generates a result.
- Customizable analysis allows teachers to adjust how much analysis students perform to the needs of a class or learning situation.
- The app is intended to be free, advertisement-free, and functionally consistent across Android and iOS, although sensor availability creates technical limitations.
- phyphox was released in September 2016 with an accompanying website offering instructions, demonstration videos, and technical information.
3. Remote access
phyphox enables students to monitor and control smartphone experiments remotely through a web browser, avoiding the need to access the phone during measurement and reducing network demands compared with video streaming.
- Pendulum, rotating-phone, and roll experiments can prevent students from continuously seeing measurement results during the experiment.
- In a roll experiment, the gyroscope measures angular velocity and the phone’s radius is used to calculate the roll’s speed.
- Common acquisition apps produce handling artifacts and require computer analysis, while students must remove the phone to inspect data or repeat runs.
- The remote-access setup requires phyphox only on the host phone; other devices, including tablets, computers, and a Playstation 4, access it through browsers.
- A second device on the same network can enter the displayed URL to start or stop the experiment and plot collected data in real time.
- phyphox transmits experimental data through a web server and browser polling rather than streaming video, allowing barely noticeable graph latency on a good connection.
4. Data analysis
phyphox performs and exposes customizable sensor-data analysis, allowing experiments to emphasize kinematics or accessibility rather than requiring all processing on a computer.
- In the elevator experiment, pressure data yields height differences, numerical differentiation yields vertical speed, and the accelerometer provides vertical acceleration.
- phyphox displays altitude, vertical speed, and acceleration as functions of time after performing the analysis in the app.
- The Android interface presents raw sensor data and a collection of categorized experiments with data analysis.
- Real-time plots connect students’ experienced acceleration with the acceleration graph, and the experiment requires neither additional knowledge nor computer access.
- Automated in-app analysis can shift an experiment toward kinematics and support learners without the mathematical skills required for raw-data analysis.
- The app’s experiment files define sensor sources, mathematical operations, and visualization methods, enabling users to customize experiments.
- A web-based editor lets teachers modify existing experiments visually and distribute the resulting files to phones through several transfer methods.
5. Conclusions
phyphox makes smartphone-based physics experiments more accessible by providing remote control and data analysis in the field. Its data-analysis requirements can be removed or tailored to specific classes and learning situations.
- phyphox extends students’ experimental tools with remote control and data analysis in the field.
- Data-analysis requirements can be removed entirely or tailored to a specific class and learning situation.