Abstract:

In order to overcome shortcomings of the narrow range to measure, the big error and the low accuracy in measurement techniques of the motional electromotive force, an intelligent electromotive force measuring device in electromagnetic environment is designed to accomplish this task. This device is equipped with the SPDT relay with an inverter and five pins, which enables us to measure motional electromotive force generated by the forward and reverse movement of the coil, and the moving speed of the rectangular coil is automated controlled as well. The data is displayed directly by the digital tubes, creating an intelligent measurement system. This device thus is capable of measuring the millivolt of motional EMF, with advantages of the large measuring range, intelligence, visualization, smaller error and high precision, so it makes up the existing motional EMF measuring device deficiencies.

Key words: Motional electromotive force, electromotive force measuring, measuring device