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accurate-speed-measurement-using-the-ultrasonic-sensor-723dfc-en.md

To make certain functions, we need accurate speed measurements, however while working on a small scale, such sensors like speed encoders cannot fit. This is why I have used a small formula to take advantage of a very popular sensor the ultrasonic HCSR04

EXPANDED TECHNICAL DETAILS

Delta-Distance Velocity Analytics

This project provides a precise way to measure the speed of a moving object (like a toy car) using a single ultrasonic sensor and high-speed temporal calculation.

  • $\Delta T / \Delta D$ Calculation Engine: The Arduino take two ultrasonic distance readings $D_1$ and $D_2$ with a precisely timed interval $T$ (e.g., 100ms) between them. The velocity is calculated as $(D_2 - D_1) / T$.
  • High-Resolution Timer Integration: Uses the micros() function to ensure the time interval is accurate to the microsecond, which is essential for measuring high speeds over short distances.

Accuracy

  • Noise Rejection Logic: (Features) Includes a median filter that ignores "Jumps" in distance data caused by multi-path sonic reflections, ensuring the calculated speed is stable and reliable.

ข้อมูล Frontmatter ดั้งเดิม 

title: "Accurate Speed measurement using the UltraSonic sensor"
description: "Using HCSR04 and basic maths !"
author: "Aouadja"
category: ""
tags:
  - "tracking"
  - "cars"
  - "communication"
views: 6724
likes: 1
price: 870
difficulty: "Intermediate"
components:
  - "1x Jumper wires (generic)"
  - "1x Ultrasonic Sensor - HC-SR04 (Generic)"
  - "1x Arduino UNO"
tools: []
apps:
  - "1x Arduino IDE"
downloadableFiles: []
documentationLinks: []
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seoDescription: "Accurate Speed measurement project using UltraSonic sensor HCSR04, Arduino, and basic maths calculations."
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