digital tachometer using esp32 is a M.Tech project topic for Chemical Engineering. It gives students a clear starting point for research, implementation planning, and documentation.
digital tachometer using esp32 Project Details
| Abstract |
This project shows how to design, build, and calibrate a cheap, non‑contact digital tachometer. It uses an ESP32 microcontroller, a comparator‑based infrared (IR) reflective sensor, and an I2C character LCD. The device is meant for monitoring processes in chemical‑engineering plants. In many process industries, keeping track of the speed of rotating equipment—such as agitators, pumps, and centrifuges—is essential for stable and safe operation. The tachometer works with a single reflective marker placed on the shaft. Each time the marker passes the sensor, it creates one pulse. The ESP32 runs firmware that handles each pulse with an interrupt service routine and instantly converts the pulses into rotational speed. A hybrid estimation
algorithm is used: * At high speeds it measures the time between pulses (pulse period). * At low speeds it counts pulses inside an adaptive time window. To keep the data clean, the firmware adds several safeguards: * An adaptive lockout that ignores rapid comparator chatter. * Exponential smoothing of the speed value. * A timeout that detects when the shaft has stopped. We calibrated the system against a reference laser tachometer. The results were very accurate, with a mean absolute percentage error of **0.52 %** and a strong linear correlation. This tachometer can act as a basic edge‑sensing node for digital‑twin setups and real‑time process‑control simulations.
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| Reference Paper |
Design and Calibration of a Digital Tachometer Using ESP32 and an IR Reflective Sensor |
| Domain |
Chemical Engineering |
| Sub-Domain |
Process Systems / Process Simulation & Control / Digital Twin |
| PDF Download |
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| Get Help |
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