Advanced Scanning: Dimensioning with the Ultrasonic Radar

Standard Arduino "Radar" projects involve sweeping an HC-SR04 Ultrasonic Sensor using a servo motor to map distances. The Image Scaler for Arduino Object Radar takes this a step further by introducing Object Dimensioning. Instead of just identifying "There is an object at 10cm," this system calculates approximately how wide that object is, providing critical data for collision avoidance in autonomous vehicles or underwater drones (submarines).

The Geometry of Ultrasonic Scaling

The "Scaling" logic relies on the relationship between sweep angle and distance:

• Angular Width: As the servo sweeps (usually 0-180 degrees), the Arduino monitors the pulseIn() duration. By recording the exact angle where an object is first detected and where the signal is lost, the software determines the "Angular Width" of the object.
• Trigonometric Calculation: Using basic trigonometry (the Sine rule), the system calculates the physical width of the object based on its distance from the sensor. An object that spans 5 degrees at 10cm is much smaller than an object spanning 5 degrees at 1 meter.
• Resolution Limits: The accuracy of the "Image Scaler" depends on the sweep step (usually set to 1 degree) and the beam-width of the HC-SR04, which is approximately 15 degrees.

Visualization with Processing

While the Arduino handles the trigonometry, Processing (the visual programming language) handles the display:

1. Radar Map: A 2D "Polar Map" is rendered on the screen, showing the sweeping green line representing the sensor's current heading.
2. Size Rendering: When an object is detected, Processing draws a "Bar" or a colored arc that reflects not just the distance (radial position) but also the calculated size (arc width).
3. Collision Alert: If an object of a specific size appears within a critical range, the UI can trigger a visual alarm, mimicking the SONAR systems used in naval navigation.

Real-World Marine Application

The author specifically notes that this project is designed for Underwater Submarines and Ships. In murky water, optical cameras fail, but ultrasonic (SONAR) imaging provides a reliable way to differentiate between a small piece of debris and a large underwater obstacle, ensuring a safe path for autonomous maritime drones.

Modified #image_scaling_with_Arduino.🤞 Now scale the exact size of objects and also get the range and angle of objects on your screen...✌️😎

Image scaler and Arduino object Radar will help the vehicle to get the exact location size and angle of the object that will help the underwater submarines and ships to avoid the Collision.✌️😎👨‍💻

As per my last project...

There we can only get the information like angle and distance of the object. But now in this project you can also get the size of the object.

With the help of image scalar we can get the approx size log of an object and avoid the obstacle while the time of collision.

Such type of scalars can help the under water vehicles to move safely under water.