Method for preventing false awakening of electronic tags

Abstract

The invention discloses a method for preventing false awakening of electronic tags. A 5.8G communication module is applied to the method, and comprises a 5.8G chip transmitting circuit, an awakening circuit, an RSSI (received signal strength indicator) detection circuit and a 5.8G chip receiving circuit. The RSSI detection circuit and the 5.8G chip receiving circuit are electrically connected in series. The RSSI detection circuit and the 5.8G chip transmitting circuit are electrically connected in series. The awakening circuit is electrically connected with an interruption detection module inseries. The interruption detection module is electrically connected with an awakening pulse period detection module in series. The awakening pulse period detection module is electrically connected with the RSSI detection circuit in series. The 5.8G chip receiving circuit is electrically connected with an RSSI sampling gap module in series. The method for preventing false awakening of the electronic tags has the advantages that start and stop of the RSSI detection module are controlled by the RSSI sampling gap module, low power consumption is achieved, and accordingly, stable equipment operation is realized.

Description

technical field [0001] The invention relates to the technical field of intelligent transportation, in particular to a method for preventing false wake-up of an electronic tag. Background technique [0002] ETC (Electronic Toll Collection, electronic toll collection system) refers to an electronic toll collection system that can realize vehicle identification, information writing and automatic deduction of corresponding funds from the IC card through the on-board unit OBU when the vehicle passes the toll station. ETC mainly includes OBU and RSU. The RSU sends out radio frequency signals through the microwave antenna. When the OBU receives the radio frequency wake-up signal emitted by the RSU, it starts receiving and completes the vehicle information writing and deduction operations. [0003] With the development of mobile Internet, 3G and 4G networks are developing at a speed beyond everyone's imagination. In order to meet the application scenarios, operators have increased t...

AI Technical Summary

Problems solved by technology

[0003] With the development of mobile Internet, 3G and 4G networks are developing at a speed beyond everyone's imagination. In order to meet the application scenarios, operators have increased the coverage of 3G and 4G networks. There may be different frequency bands in the actual application environment of the ETC system. , wake-up sources with different signal strengths, these wake-up sources continuously transmit radio frequency signals to the outside; however, these radio frequency signals are not emitted by the RSU, and do not belong to the wake-up signals of the OBU (also called false wake-up signals). Frequent false wake-ups will be carried out under the action of the vehicle, causing the OBU power to be consumed sharply until it is exhausted, which will greatly reduce the service life of the OBU; Especially serious, so we propose a method to prevent false wake-up of electronic tags

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