Patent ID: 9737802
Date: 2017-08-22
CPC Classifications: A63F,A63H,G06K,G09B

Claim:
1. A system for recognizing objects that are placed together, comprising: a plurality of objects, each object comprising a structure that is made with a material of high dielectric constant and is fully embedded in the object and near a surface of the object, and an RFID tag that comprises a unique identification code (UID) of the object, wherein the structure assumes a three dimensional shape of two parallel flat metal discs connected by a single electric wire, and wherein one disc is placed near a surface of the object, and the other disc is placed near the opposite surface of the object, a processor, a memory unit operatively linked to the processor, a capacitance sensor that is operatively linked to the processor and is configured to measure a capacitance change each time an object is placed on or in close proximity to the capacitance sensor, and each time an object is placed on another object that is placed on or in close proximity to the capacitance sensor, an RF antenna that is operatively linked to the processor, wherein, upon an object being placed on the sensor, the processor is configured to receive, from the sensor, a first change in capacitance, and from the RF antenna, the UID of the object, and to record the information that a first object of a particular UID has been placed on the sensor, and wherein, upon a second object being placed on top of the first object, the processor is configured to receive a second change in capacitance, and the UID of the second object, and to record the information that a second object of a particular UID has been placed on top of the first object.