Radio frequency gasket, screw fastener and positioning and tightness detection method of screw fastener

Abstract

The invention relates to a radio frequency gasket, a screw fastener and a positioning and tightness detection method of the screw fastener. The radio frequency gasket comprises a gasket part and a passive radio frequency transponder part, the gasket part is provided with a through hole, the passive radio frequency transponder part comprises an RFID chip, a radio frequency antenna circuit and a switch detection circuit, and the radio frequency antenna circuit and the switch detection circuit are electrically connected with the RFID chip. The switch detection circuit extends to the gasket part and is disconnected to form two contact terminals, and when the gasket part is pressed tightly, the two contact terminals are conducted to enable the switch detection circuit to form a conduction loop. The screw fastener comprises a bolt, a nut and the radio frequency gasket. The detection method comprises the step of reading a position signal of the screw fastener and an on-off signal of the switch detection circuit by using a reader so as to judge whether the screw fastener is fastened or loosened. The radio frequency gasket, the screw fastener and the positioning and tightness detection method of the screw fastener have the advantages that a position signal and a switch detection circuit connection or disconnection signal are obtained at the same time, detection is convenient, and the maintenance efficiency is improved; a passive wireless radio frequency technology is adopted, so that the service time is not limited by electric quantity; and the radio frequency gasket can be used repeatedly.

Description

technical field [0001] The invention relates to the technical field of radio frequency (RFID) identification, in particular to a radio frequency gasket, a screw fastener and a positioning and tightness detection method thereof. Background technique [0002] In industrial activities, many screws and fasteners used in vibration environments will loosen or even fall off after long-term use and cause accidents. Therefore, maintenance personnel are required to maintain and check frequently. However, this kind of regular maintenance inspection, on the one hand, has a large amount of labor, high labor costs, and low efficiency. On the other hand, the working environment is usually harsh (such as the maintenance of high-altitude fasteners at the top of the power tower). Occasionally, there will be accidents such as falling from high altitude, electric shock, mechanical extrusion, etc. At the same time, due to manual maintenance, missed inspections are prone to occur, and the loosen...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a radio frequency gasket, a screw fastener and its positioning and tightness detection method, aiming to overcome many shortcomings in the prior art that the tightness of the screw fastener usually requires manual maintenance.

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