Control method and device of esam, obu

A control method and controller technology, applied in the field of intelligent transportation, can solve problems such as long initialization process, low instruction efficiency, and inapplicability of OBU, and achieve the effect of saving initialization operation time and improving instruction efficiency

A control method and controller technology, applied in the field of intelligent transportation, can solve problems such as long initialization process, low instruction efficiency, and inapplicability of OBU, and achieve the effect of saving initialization operation time and improving instruction efficiency

CN104463986BActive Publication Date: 2017-01-25SHENZHEN GENVICT TECH
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  • Control method and device of esam, obu
  • Control method and device of esam, obu
  • Control method and device of esam, obu

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0063] Such as figure 2 As shown, the present invention provides the first embodiment of the ESAM control method, including:

[0064] Step S101: In this OBU transaction, power on after receiving the power on command from the OBU controller;

[0065] A transaction starts when the vehicle passes the RSU at high speed. In this transaction, the OBU controller first wakes itself up, and then sends a power-on command to the ESAM through the DATA pin of the ESAM, and the ESAM receives the power-on command sent by the OBU controller. After the command, power on itself.

[0066] Step S102: If the de-initialization flag is valid, then automatically complete its own initialization operation. The de-initialization flag is set after receiving the de-initialization instruction sent by the OBU controller after the last OBU transaction ends;

[0067] After the last transaction before this transaction is over, if the OBU controller wants the ESAM to complete the initialization operation whe...

no. 2 example

[0076] Such as image 3 As shown, the present invention provides a second embodiment of the ESAM control method, including:

[0077] Step S201: ESAM receives the power-on command of the OBU controller and then powers on;

[0078] Step S202: If the de-initialization flag is valid, it will automatically complete its own initialization operation. The de-initialization flag is set after receiving the de-initialization instruction sent by the OBU controller after the last OBU transaction ends;

[0079] Step S203: After the initialization operation is completed, the ESAM sends an initialization success signal to the OBU controller;

[0080] Step S204: ESAM interacts with the OBU controller;

[0081] Step S205: The OBU controller judges whether the power consumption of the ESAM is less than the preset threshold, if it is greater, enter step S206, and if it is less, enter step S207;

[0082] In general, in order to reduce the power consumption of the OBU, after the end of the trans...

no. 3 example

[0094] Above embodiment is all the method that is carried out for ESAM end, introduces the method that OBU controller end carries out below, as Figure 5 As shown, the present invention also provides a third embodiment of an ESAM control method, including:

[0095] Step S301: In this OBU transaction, send a power-on instruction to ESAM;

[0096] In this OBU transaction, the OBU controller sends a power-on command to the ESAM, and after the OBU controller wakes up, it sends a power-on command to the ESAM to make the ESAM power on.

[0097] Step S302: After the ESAM receives the power-on command to power on and completes the initialization operation, receive the initialization success signal sent by the ESAM;

[0098] After ESAM receives the power-on command and powers on, it judges whether its internal de-initialization flag is valid, and if it is valid, it automatically completes its own initialization operation, and after completing the initialization operation, sends an ini...

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Abstract

The invention provides an ESAM control method and device and an OBU. The method comprises the steps that an OBU controller sends an initialization instruction to an ESAM in advance; the ESAM sets an initialization flag of its own after receiving the initialization instruction; the ESAM judges whether the initialization flag is valid after being energized, and if the initialization flag is valid, the ESAM completes the initialization process of its own. According to the method, the ESAM is adopted to complete initialization operation of its own, and there is no need to adopt the OBU controller to send a series of initialization instructions to the ESAM to conduct initialization operation on the ESAM; the OBU controller can conduct initialization operation on other electronic devices of its own when the ESAM conducts initialization operation, so the time for initialization operation of the OBU is not occupied, the instruction efficiency of the OBU is improved, and the OBU can adapt to an ETC system with a high requirement for the passing speed.

Description

technical field [0001] The invention relates to the field of intelligent transportation, in particular to an ESAM control method and device, and an OBU. Background technique [0002] In the 21st century, the intelligent transportation industry continues to develop rapidly, and the electronic toll collection (Electronic Toll Collection, ETC) system is increasingly widely used. The ETC system includes electronic tags (On Board Unit, OBU), road side units (Road Side Unit, RSU) and moving vehicles. One of the electronic components of the OBU is an Embedded Secure Access Module (ESAM). As a secure storage module, the ESAM is mainly used to store individual information of the OBU, such as vehicle information and transaction records. [0003] In the ETC system, the OBU is placed in the driving vehicle. When the vehicle passes the RSU at high speed, microwave communication is used between the OBU and the RSU erected on the roadside, and combined with the stored information inside t...

Claims

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Application Information

Patent Timeline
25 Jan 2017
Publication
CN104463986B
IPC
G07B15/06
CPC
G07B15/063
Inventors
郭云峰; 向涛