A system and method for electronic non-parking toll collection

Abstract

The present invention relates to an electronic toll collection system and method. The system includes: a signal detection unit whose detection range is the first communication range, a roadside unit whose detection range is the second communication range; the first communication range and the second communication range The projections on the road partially overlap, and the projection of the second communication range on the road includes a part that does not overlap with the projection of the first communication range on the road on the side away from the incoming vehicle; wherein, the signal detection unit is configured to receive The vehicle-mounted unit signal carried by the vehicle entering the first communication range to obtain the first identification number; the roadside unit is used to receive the vehicle-mounted unit signal carried by the vehicle entering the second communication range so as to obtain the second identification number, and When the first identification number and the second identification number obtained from the signal of the vehicle-mounted unit received at the same time are different, a charge-deduction transaction is generated with the vehicle-mounted unit within the second communication range. The invention has a simple structure and can effectively prevent interference from following vehicles.

Description

technical field [0001] The invention relates to the technical field of intelligent transportation, in particular to an electronic non-stop charging system and method. Background technique [0002] Electronic Toll Collection (hereinafter referred to as ETC) has developed rapidly in the field of intelligent transportation. In the prior art, ETC consists of roadside units (RSU: Road-Side Units) and on-board units (On-Board Unit, hereinafter referred to as OBU, also known as electronic tags), and charges are deducted for vehicles equipped with OBU, monitoring or management. [0003] Usually, the RSU and the OBU use dedicated short-range communication technology (Dedicated Short Range Communications, hereinafter referred to as DSRC) for communication, and are determined by the direction and power of the antenna used by the RSU. In practical applications, the distribution range and intensity of electromagnetic waves emitted by the RSU 101 are not strictly controllable due to the...

AI Technical Summary

Problems solved by technology

In addition, different car windows and car film materials have varying degrees of influence on the sensitivity of the OBU, which increases the uncertainty of the fuzzy communication area 104, which is likely to cause car-following interference and the occurrence of missed and wrong deductions.

[0004] Car-following interference means that the vehicle behind trades before the vehicle in front, resulting in the vehicle in front being released without a transaction, while the vehicle behind completes the transaction (deduction) but cannot pass

Specifically, the following situations mainly include: (1) Both the front car and the rear car are equipped with OBUs (both OBU sensitivities meet the national standard), and the rear car completes the transaction before the front car due to its higher OBU sensitivity. As a result, the vehicle in front was released without a transaction, but the vehicle in the rear was intercepted after completing the transaction; (2) In the ETC channel and MTC (manual semi-automatic toll collection) / ETC mixed channel, the vehicle in front is not equipped with OBU while the vehicle in the rear is equipped with OBU, and the vehicle in front has not yet When manual or semi-automatic operations (such as payment, card withdrawal, etc.) are completed, the OBU and RSU of the following vehicle have completed the transaction. At this time, the vehicle in front that has not paid the fee will be released, while the vehicle behind that has completed the transaction will be intercepted; (3) in ETC In the dedicated channel, both the front car and the rear car are equipped with OBUs, but the sensitivity of the rear car’s OBU meets the national standard, while the front car’s OBU sensitivity is lower or even lower than the national standard threshold (it may be affected by the body material or car film). At this time, the rear car The transaction may be completed before the vehicle in front, so that the vehicle in front is released without completing the transaction, and the vehicle behind completes the transaction but is intercepted or requires multiple transactions

[0005] Different methods of preventing car-following interference are disclosed in the prior art. Although the communication between the RSU and the low-sensitivity OBU is realized by using a larger RSU signal transmission power, it has a certain effect on the first or second type of car-following interference mentioned above. , but while increasing the RSU signal strength, it also increases the RSU's effective communication area and fuzzy communication area (such as covering the position of the rear car), which increases the probability of car-following interference, so it cannot effectively solve the third type of follow-up car interference

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