Parameter setting method and system of on-board unit and apparatuses

Abstract

The application discloses a parameter setting method and system of an on-board unit (OBU) and apparatuses. Because the sensitivity or transmitting power of a calibrating device is configured based on the sensitivity or transmitting power of a simulated road-side unit (RSU) as well as the signal attenuation amount caused by the environment where the on-board unit and the calibrating device are located, successful interaction between the on-board unit and the calibrating device represents that the transmitting power or sensitivity set by the on-board unit meets the requirement and communication with the simulated road-side unit can be completed. Therefore, the successful rate of communication between the OBU and the RSU can be ensured. When the OBU is installed at a different position, the transmitting power or sensitivity of the OBU can be set by using the method, so that the OBU installation becomes flexible. Besides, the parameter setting method is simple, rapid and convenient and is suitable for large-scale popularization and application.

Description

technical field [0001] The present application relates to the field of electronic non-stop charging, and in particular, designs a method, device and system for setting parameters of a vehicle-mounted unit. Background technique [0002] Electronic Toll Collection (ETC) is a toll collection technology that does not require parking fees to pass through toll booths. The vehicle completes the charging process by installing the On-Board Unit (OBU) on the inside of the front windshield to communicate with the Road-Side Unit (RSU). Generally, the OBU has set the corresponding sensitivity and transmit power before leaving the factory. When actually passing the toll station, the OBU will communicate with the RSU with the set sensitivity and transmit power. [0003] In order to prevent excessive UV light and ensure thermal insulation, the front windshield is coated. Due to the influence of the coating, the windshield will attenuate the signal passing through it, which may cause the c...

AI Technical Summary

Problems solved by technology

Due to the influence of the coating, the windshield will attenuate the signal penetrating through it, which may cause the communication failure between the OBU and the RSU

For example, for an RSU of a specific standard, each OBU and RSU can successfully communicate within a distance of 3-7 meters. If the OBU sensitivity is too high, the OBU will trade with the RSU when the distance is greater than 7 meters. At this time, There will be a problem that the car in front has not yet traded, but the car in the back has already completed the transaction, and the car in front can pass through the toll booth without trading, that is, the following car problem; if the OBU sensitivity is too low, the transaction cannot be completed within a distance of less than 3 meters, and the vehicle will not be able to complete the transaction. Hitting the pole through the toll booth, that is, the pole collision problem

When setting the coated windshield, the coated windshield will produce blocking attenuation compared with the ordinary windshield, which is equivalent to reducing the sensitivity of the OBU, so that the transaction distance between the OBU and the RSU will be shortened, resulting in the problem of bumping

Also for the OBU transmit power, the same problem will arise

In addition, in order to ensure the successful communication between the OBU and the RSU, the OBU must be attached to the inside of the front windshield, which limits the installation position of the OBU and is not very flexible.

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