METHOD AND APPARATUS FOR DETECTING AN ELECTRIC CODE

摘要

This publication discloses an apparatus and method for reading an electronic code. The apparatus comprises means for generating an alternating-electricity signal (2), electrodes (4, 5) connected to the alternating-electricity signal generating means (2) for bringing the alternating-electricity signal to the code (11) being read, and means for measuring the current travelling through the electrodes (4, 5) or the voltage between them. According to the invention, the electrodes (4, 5) are open, without an insulator layer, and the means for generating an alternating-electricity signal (2) are such that they generate an alternating-electricity signal of at least 1 MHz.