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

An on-board unit and parameter setting technology, applied in ticketing equipment, instruments, etc., can solve the problems of OBU and RSU communication failure, collision rod, low flexibility, etc., to ensure the success rate of communication and the effect of flexible installation

Active Publication Date: 2014-05-14
SHENZHEN GENVICT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 l

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0031] Example 1:

[0032] Please refer to figure 1 , the OBU101 is installed on the inside of the front windshield 102, and the calibration device 103 is installed on the outside of the front windshield 102 through a suction cup. In order to simulate the RSU104, the calibration device 103 makes the connection line between the OBU101 and the calibration device 103 perpendicular to the front windshield 102 Of course, in other embodiments, the connection line between the OBU 101 and the calibrator 103 is not necessarily perpendicular to the front windshield 102 .

[0033] Based on the position setting of the OBU 101 and the calibrator 103, the parameter setting method of the OBU 101 in this embodiment mainly includes the following steps: figure 2 Flow shown:

[0034] Step 201, turn on the calibrator 103, and the calibrator 103 sends a command for triggering the OBU101 to enter the parameter setting mode to the OBU101. Specifically, because this step is to make the OBU101 ente...

Example Embodiment

[0040] Embodiment 2:

[0041] The main difference between this embodiment and the first embodiment is that: in the above step 202, the parameter setting signal interaction process between the OBU 101 and the calibrator 103 and the determination process of the sensitivity of the OBU 101 may be as follows:

[0042] After the OBU101 enters the parameter setting mode, the initial setting range of the sensitivity of the OBU101 (for example, between -70dbm (the highest sensitivity) to -40dbm (the lowest sensitivity)) is obtained, and the initial setting range is at the maximum setting value of the sensitivity of the OBU101 (ie -70dbm) and the minimum set value (ie -40dbm);

[0043] OBU101 uses the middle value of the initial setting range (ie -55dbm) as the sensitivity of OBU101 for parameter setting signal interaction. When the interaction fails, the middle value (ie -55dbm) is used as the minimum value and the maximum set value (ie- 70dbm) to reset the set range for the maximum v...

Example Embodiment

[0044] Embodiment three:

[0045] The main difference between this embodiment and the first embodiment is that: in the above step 202, the parameter setting signal interaction process between the OBU 101 and the calibrator 103 and the determination process of the sensitivity of the OBU 101 may be as follows:

[0046] After the OBU101 enters the parameter setting mode, a list of setting values ​​of the sensitivity of the OBU101 is obtained. Specifically, the list lists the setting values ​​of the sensitivity of the multi-level OBU101 (for example, the first level is -60dbm, and the second level is -50dbm). , the third gear is -40dbm, the fourth gear is -30dbm, etc.);

[0047] OBU101 uses an initial value indicated by the list (such as -50dbm) as the sensitivity of OBU101 for parameter setting signal interaction. When the interaction is successful, the next setting value (-40dbm) smaller than the initial value (ie -50dbm) is used as the The sensitivity of OBU101 performs parame...

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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...

Claims

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Application Information

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IPC IPC(8): G07B15/06
Inventor 肖戈陈育成
Owner SHENZHEN GENVICT TECH
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