Microfluidic chip, testing apparatus and control method therefor

A microfluidic chip configured to move a microdroplet along a predetermined path, comprising:

• a first plate having a first surface;
• a second plate having a first surface opposing the first surface of the first plate, wherein the first surface of the first plate is arranged so as to face the first surface of the second plate, the first and second plates each having an associated two-dimensional array of probe electrode groups provided on their respective first surfaces;
• wherein:
• each probe electrode group is paired with an associated opposing probe electrode group, and is spaced apart so as to define a predetermined path describing a desired path of a particular microdroplet;
• each of the plurality of probe electrode groups includes a first probe electrode and a second probe electrode spaced apart from each other;
• the first probe electrode and the second probe electrode among a plurality of first probe electrodes and a plurality of second probe electrodes are configured to form an electrical loop with the microdroplet to thereby facilitate determining a position of the microdroplet;
• and
• when a driving force is insufficient for the microdroplet to overcome an obstacle, the microfluidic chip is configured to turn on different drive electrodes such that a direction of the driving force on the microdroplet is changed, to thereby drive the microdroplet to flow through an alternate predetermined path;
• wherein at least one of the different drive electrodes and at least one of the plurality of first probe electrodes and the plurality of second probe electrodes have an overlapping projection.