EG-83 Dual Ultrasonic Measurement System-IBM
EG-93 Dual Ultrasonic Measurement System-Macintosh
In this dual measurement system, transducers at each end of the Air Track transmit ultrasonic pulses alternately, enabling the user to track two objects independently. Designed by Professor David Garelick and Eugene Gobby of the Northeastern University Physics Department, the dual transducer system avoids the unreliability of a single transducer looking for two echoes.
The software displays a real-time graph of distance vs time for both objects. After the measurements have been made, a portion of the display can be magnified for close-up examination. A comprehensive graphing routine with scaling plots average time, average position, velocity, velocity squared or acceleration in any order. An extensive regression analysis program is also included which will fit the data to a first, second or third degree polynomial.