Capacitivity and frequency effect index detection device and method, and explorative substance identification method

摘要

Capacitivity and frequency effect index detection device and method, the device comprising a signal generator for generating alternating current signal having at least two frequencies; a current and phase generation module for generating current and phase information corresponding to each frequency; a first and second test electrodes, the first test electrode for sending the signal to a first position in a test area; the second test electrode for providing reference voltage at a second location in the test area; the first test electrode also for generating voltage information corresponding to each frequency, the voltage information as voltage information of the first position relative to the reference voltage of the second position; and a processing unit for determining at least one type of parameter information corresponding to each frequency and determining the capacitivity and frequency effect index of the test area according to any two frequencies and the parameter information.