Coupling ele ctronic seal

Abstract

The present invention includes a plug bolt (A) and a bolt seat ( B). The plug bolt (A) includes a bolt pin (10) having a receiving hole (13) that receives a circuit device (20) including an RFID chip (24) electrically connected with a main circuit (22) and a radiation unit (23). The receiving hole (13) defines a hole body (133) arranged in an axial direction, and an open hole bottom (132) at a bottom of the hole body (133). The main circuit (22) includes a lower contact point ( 221). The radiation unit (23) induces an effect of coupling feed with respect to the hold body to make the bolt pin (10) forming an upper monopole antenna. The bolt seat ( includes a lower monopole antenna (60) and a locking hole (32) into which the bolt pin (10) is insertable. When the lower monopole antenna (60) is electrically connected with the lower contact point ( 221), the upper and lower monopole antennas (60) jointly form a standard dipole antenna to emit a signal that is monitorable.