Posts in Raspberry Pi
Raspberry Pi Vibration Analysis Experiment With a Free-Free Bar
Raspberry Pi Vibration Analysis Experiment With a Free-Free Bar

Using the Euler-Bernoulli beam theory, the resonant frequencies of a beam will be measured using a thin film piezoelectric transducer and compared to the theoretical calculations. A Raspberry Pi will be used along with a high-frequency data acquisition system (Behringer UCA202, sample rate: 44.1kHz) and the Python programming language for analysis. The fast fourier transform will allow us to translate the subtle beam deflections into meaningful frequency content. This tutorial is meant to introduce Python and Raspberry Pi as formidable tools for vibration analysis by using measurements as validation against theory.

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Data Analysis, Engineering, Raspberry Pi, Python, ProgrammingJoshua HriskoEuler-Bernoulli, Beam, Raspberry Pi Engineering, Raspberry Pi, Raspberry Pi Datalogger, Behringer UCA202, Raspberry Pi Data, Raspberry Pi Vibration, Raspberry Pi Analysis, Raspberry Pi DAQ, Raspberry Pi Acquisition, Vibration, Acoustics and Vibration, Engineer, Engineering, Python, Python FFT, Python Programming, Differential, Differential Equation, Boundary Conditions, Transcendental Equation, Frequency, Frequency Analysis, Frequency Spectrum, Python Frequency Spectrum, Resonance Frequency, Modes, Bar Modes, Modes of a Bar, Experiment, Piezo, Piezoelectric, Aero-ThermalComment
Loudspeaker Analysis and Experiments: Part I
Loudspeaker Analysis and Experiments: Part I

In this tutorial, a loudspeaker will be analyzed by calculating the Thiele-Small parameters from impedance measurements using an inexpensive USB data acquisition system (minimum sampling rate of 44.1 kHz). The methods used in this project will educate the user on multiple engineering topics ranging from: data acquisition, electronics, acoustics, signal processing, and computer programming.

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Data Analysis, Electronics, Engineering, Python, Programming, Raspberry PiJoshua HriskoAcoustics, Acoustic Analysis, Acoustics and Vibration, Raspberry Pi Acoustics, Thiele-Small, Thiele-Small Parameters, Audio, Audio Engineering, Loudspeaker, Speaker, Driver, Impedance, Resonance, Frequency, FFT, Python FFt, Python Impedance, Python Programming, DC, Resistance, Impedance Phase, Sine Wave, Inductance, Loudspeaker Characterization, Efficiency, Loudspeaker Efficiency, Air, Loudspeaker Wiring, Loudspeaker Resonance, Resonance Frequency, 44.1kHz, Sampling, Sample Rate, Audio Sampling, Raspberry Pi Audio, Raspberry Pi Engineering, Engineering Acoustics, Acoustic Engineering, Acoustic Engineer, Spectrum, Python FFT, Python Frequency Spectrum, Hz, HertzComment
Audio Processing in Python Part III: Guitar String Theory and Frequency Analysis
Audio Processing in Python Part III: Guitar String Theory and Frequency Analysis

In this continuation of the audio processing in Python series, I will be discussing the live frequency spectrum and its application to tuning a guitar. I will introduce the idea of nodes and antinodes of a stringed instrument and the physical phenomena known as harmonics. This will give us a better idea of how to tune the guitar string-by-string and also discern the notes of a given chord - all calculated using the FFT function in Python.

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Data Analysis, Engineering, Programming, Python, Raspberry PiJoshua HriskoAcoustics and Vibration, Acoustics, Raspberry Pi Acoustics, Guitar, Frequency Spectrum, Frequency Analysis, Guitar String Physics, Guitar String, Audio, Raspberry Pi Audio, Raspberry Pi pyaudio, Modes of a String, String Modes, Physics, Signal Processing, Digital Signal Processing, Acoustic Guitar, Guitar Frequencies, FFT, Fast Fourier Transform, Python FFT, Python Code, Python Spectrum, Python Frequency Spectrum, Python Real-Time, Aero-Thermal, Raspberry Pi, Raspberry Pi Datalogger, raspberry piComment
Audio Processing in Python Part II: Exploring Windowing, Sound Pressure Levels, and A-Weighting Using an iPhone X
Audio Processing in Python Part II: Exploring Windowing, Sound Pressure Levels, and A-Weighting Using an iPhone X

Raspberry Pi 3B+ acoustic analysis using Python. Audio recording and signal processing with Python, beginning with a discussion of windowing and sampling, which will outline the limitations of the Fourier space representation of a signal. Discussion of the frequency spectrum, and weighting phenomenon in relation to the human auditory system will also be explored. Lastly, the significance of microphone pressure units and conversion to the decibel will be briefly introduced and explained.

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Data Analysis, Engineering, Python, Programming, Raspberry PiJoshua HriskoRaspberry Pi, Acoustics, Acoustics and Vibration, Raspberry Pi Audio, Raspberry Pi Acoustics, Signal Processing, Digital Signal Processing, Audio, Raspberry Pi pyaudio, Python Audio, pyaudio, Python pyaudio, Nyquist, Sample Rate, Sampling, Spectrum, Frequency Spectrum, FFT, Fast Fourier Transform, Decibel, Decibels, Logarithm, A-Weighting, SPL, Sound Pressure Level, Sound Level Meter, Sound, iPhone, iPhone X Sound, Aero-Thermal Comments
Heat Transfer of the Raspberry Pi Using Arduino, An Infrared Thermometer, and Type-K Thermocouple
Heat Transfer of the Raspberry Pi Using Arduino, An Infrared Thermometer, and Type-K Thermocouple
Arduino, Data Analysis, Engineering, Editor's Picks, Raspberry Pi, Programming, PythonJoshua HriskoHeat Transfer, Broadcom, heat, CPU, Arduino Uno, Arduino, Thermocouple, MLX90614, MAX6675, IR, Infrared, Wiring, Temperature, GitHub, Ceramic, Aluminum, Sparkfun, Adafruit, Python, Serial Port, Serial, pySerial, Loop, Stress, Convection, Conduction, Nusselt Number, Empirical, Heat Sink, Aero-Thermal, Raspberry Pi, Heat Transfer Arduino, Arduino Heat, Arduino Heat Engineer, Arduino Heat Transfer, Arduino Engineering Heat Transfer, Engineer, EngineeringComment
Heat Mapping with a 64-Pixel Infrared Detector (AMG8833), Raspberry Pi, and Python
Heat Mapping with a 64-Pixel Infrared Detector (AMG8833), Raspberry Pi, and Python
Electronics, Most Popular, Data Analysis, Python, Raspberry Pi, Programming, Editor's PicksJoshua HriskoRaspberry Pi, AMG8833, Grid-eye, 8x8 IR, Infrared, IR sensor, Arduino IR, Arduino IR Array, Arduino AMG8833, Radiation, Stefan-Boltzmann, Raspberry Pi AMG8833, Raspberry Pi Zero W, Raspberry Pi Zero, Adafruit AMG8833, Raspberry Pi Adafruit, Python AMG8833, Python Raspberry Pi, Python, Heat Map, IR detector, Mapping Python, Python heat map, 2018 #5 Comments
A Heat Transfer Experiment with Coffee
A Heat Transfer Experiment with Coffee
Engineering, Python, Raspberry Pi, ArduinoJoshua HriskoHeat Transfer, Nespresso, Newton, Newton's Law of Cooling, Thermodynamics, Calculus, Differential, Temperature, Logarithm, Arduino Experiment, Raspberry Pi Datalogger, Thermocouple, MAX6675, Experiment, GitHub, Data Acquisition, Data Analysis, Aero-Thermal, ENGR101, Heat Transfer Arduino, Arduino Heat Transfer, Arduino MAX6675, Arduino Temperature, Arduino Thermocouple, Arduino Thermocouple Project, Thermocouple Arduino, MAX6675 Arduino, MAX6675 Project, MAX6675 Thermocouple, MAX6675 Arduino Project, Arduino Thermocouple MAX6675, Arduino Thermocouple Experiment, Arduino Engineering, Arduino Engineering Heat Transfer, Arduino Heat, Arduino Engineer, Arduino Heat Engineer, Arduino Engineering Tutorial, Arduino Project, Raspberry Pi, Differential Equation, Engineer, Engineering