Measurement Techniques on Distance Using a Web Browser

Abstract

The Internet provides a convenient and effective medium by which real (as opposed to simulated) experiments can be made available to students in distance learning courses. Here a laboratory exercise in measuring techniques is described. The measurements are performed on a DC-motor with a propeller. The voltage to the motor is controlled. Input power, propeller speed and force are measured. The students use an ordinary web browser to control and take readings from the instruments. Various relations are then studied 'off-line' using Excel or Matlab and vibration analyses are performed by making Fourier transforms of the force sensor signal.