Patent ID: 7647838

Claim:
A sensor element, comprising: a conductive elastic member whose electrical property changes when compressed or expanded by an external force, and a plurality of electrode elements, configured to receive power supply, for measuring an electrical property from outside; wherein the plurality of electrode elements are grouped into one or more sets, each having a predetermined number of electrode elements, for measuring an electrical property, and the electrode elements grouped into a set are arranged three-dimensionally inside and on the surface of the conductive elastic member; wherein the predetermined number of electrode elements constituting a set are respectively arranged at each vertex of a virtual polyhedron and comprise mobile electrode elements whose position is capable of being displaced when an external force is received, and fixed electrode elements whose position is incapable of being displaced even when an external force is received; wherein the fixed electrode elements are provided with a support member for supporting said fixed electrodes in an immobile state; and wherein said conductive elastic member comprises: a base member formed so as to be recoverable to its original form from expansion or compression by an external force and a plurality of an conductive members having electrical conductivity mixed into the base material; wherein, a contact state among the conductive members changes when an external force acts on the position at which the conductive members are located, whereby a different internal resistance value is shown.