Ultrasonic detector

Project  / Project number: SO39/05 2007  /  Status:


The challenge

Ultrasonic detectorThe 60 year old deaf/blind client requested a device that would warn him of head height obstructions when walking.

An ultrasonic proximity detector was mounted on a shoulder saddle and connected to a vibrator fastened to the client’s wrist. Electronic circuitry converts the signal from the sensor to a pulsating voltage that operates the vibrator.

The client is very pleased with the result and is learning how best to take avoiding action when the vibrator indicates that there is an obstruction about a metre from his face.