CN106454699B - A RFID communication method of charging pile based on ZigBee mesh network - Google Patents

Abstract

The invention discloses charging pile RFID communication methods based on a ZigBee mesh network, which comprises the steps of forming the ZigBee mesh network by utilizing a ZigBee router in a virtual machine monitor VMM (virtual machine monitor) on a pure electric vehicle PEV and a ZigBee coordinator on a charging pile, using the ZigBee router as an RFID tag, allocating 16 dynamic addresses by the ZigBee coordinator, associating the dynamic addresses with a MAC (media access control) address of a ZigBee router , using the ZigBee coordinator as an RFID reader, and identifying the approaching or leaving of the PEV to the charging pile through the RSSI (received signal strength indicator) from the ZigBee router.

Description

A RFID communication method of charging pile based on ZigBee mesh network

technical field

The invention relates to the technical field of charging piles, in particular to a charging pile RFID communication method based on a ZigBee mesh network.

Background technique

At present, under the catalysis of multiple favorable policies such as the intensive introduction of subsidies by the central and local governments, my country's new energy vehicle market continues to be in a "blowout" state. With the continuous expansion of the scale of new energy vehicles, the current situation of insufficient "grain and grass" in the construction of charging infrastructure and difficult charging has become increasingly apparent. The imperfection of charging facilities has also seriously restricted the development of new energy vehicles. Therefore, it is necessary to speed up the construction of charging piles, so that car owners do not need to worry about whether the battery is not enough when they go out. However, how to achieve fast and convenient charging of electric vehicles restricts the development of the electric vehicle industry. The existing ordinary charging piles and background management systems are not only imperfect in structure, but also in functions. At present, there are no charging piles and pure electric vehicle PEVs. The method of communication between each other, so that the pure electric vehicle cannot be charged quickly and conveniently, which affects the speed and convenience of the charging of the pure electric vehicle, and is not enough to ensure the smooth and normal operation of the electric vehicle charging station.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a charging pile RFID communication method based on ZigBee mesh network, so as to realize the mutual communication between the charging pile and the pure electric vehicle PEV, and improve the speed and convenience of the pure electric vehicle charging.

In order to solve the above technical problems, the present invention provides a charging pile RFID communication method based on ZigBee mesh network, including:

The ZigBee mesh network is formed by using the ZigBee router in the virtual machine monitor VMM located on the pure electric vehicle PEV and the ZigBee coordinator located on the charging pile;

Taking the ZigBee router as an RFID tag, a 16-bit dynamic address is assigned by the ZigBee coordinator, and the dynamic address is associated with the unique MAC address of the ZigBee router;

The ZigBee coordinator is used as an RFID reader, and the approach or departure of the PEV to the charging pile is identified through the RSSI of the received signal strength indication from the ZigBee router.

Preferably, the VMM further includes an MSP430 microcontroller and a CC2530 radio frequency transceiver.

Preferably, the MSP430 microcontroller and the CC2530 radio frequency transceiver are used to communicate with the ZigBee coordinator.

Preferably, the method further includes:

The MAC address of the ZigBee router is retrieved, the authorized user is retrieved, and the plug-in status of the PEV is detected.

Preferably, the plug-in status of the PEV is used to identify the existence of the PEV in a charging station, and associate the ID of the PEV with a designated charging point.

Preferably, the method further includes:

Use RFID reader for charging identity authentication.

Preferably, the charging identity authentication using an RFID reader includes:

Send instructions through the server, and use the instructions sent by the server to check the newly arrived pure electric vehicle PEV within a preset time interval;

When the RFID reader is initialized, the server sends the "RGST" command to check if a new ZigBee router's MAC address is registered;

Use the "STAT" command to identify whether the newly arrived pure electric vehicle PEV in the charging station is blocked;

Use the plug-in state of the pure electric vehicle PEV in the charging station to identify the existence of the pure electric vehicle PEV in the charging station, and associate the ID of the pure electric vehicle PEV existing in the charging station with the designated charging point;

If the MAC address of the ZigBee router corresponds to the authorized user account stored in the database, the server sends an enable charging command to start the pure electric vehicle PEV existing in the charging station for charging.

The present invention provides a charging pile RFID communication method based on ZigBee mesh network, which utilizes the ZigBee router in the virtual machine monitor VMM located on the pure electric vehicle PEV and the ZigBee coordinator located on the charging pile to form a ZigBee mesh network ; The ZigBee router is used as an RFID tag, and a 16-bit dynamic address is assigned by the ZigBee coordinator, and the dynamic address is associated with the unique MAC address of the ZigBee router; the ZigBee coordinator is used as an RFID reader. The received signal strength indicates RSSI to identify the approach or departure of the PEV to the charging pile. It can be seen that this method establishes a ZigBee mesh network, which consists of a ZigBee router located on a pure electric vehicle PEV and a ZigBee coordinator located on a charging pile to form a ZigBee mesh network, and the ZigBee router is used as an RFID tag. The tag, using the ZigBee coordinator as an RFID reader, identifies the approach or departure of the PEV to the charging pile through the RSSI from the ZigBee router, that is, it can identify the approach or departure of the PEV to the charging pile. In this way, the ZigBee mesh network and RFID identification and verification methods are used to provide a robust connection between pure electric vehicle PEVs and charging piles, complete the communication of charging piles, realize mutual communication between charging piles and pure electric vehicle PEVs, and improve pure electric vehicles. The speed and ease of charging.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to the provided drawings without creative work.

FIG. 1 is a flow chart of a charging pile RFID communication method based on a ZigBee mesh network provided by the present invention.

Detailed ways

The core of the present invention is to provide a charging pile RFID communication method based on ZigBee mesh network, so as to realize mutual communication between the charging pile and the pure electric vehicle PEV, and improve the charging speed and convenience of the pure electric vehicle.

In order to make those skilled in the art better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Please refer to FIG. 1. FIG. 1 is a flowchart of a ZigBee mesh network-based charging pile RFID communication method provided by the present invention. The method includes:

S11: Use the ZigBee router in the virtual machine monitor VMM on the pure electric vehicle PEV and the ZigBee coordinator on the charging pile to form a ZigBee mesh network;

S12: The ZigBee router is used as an RFID tag, a 16-bit dynamic address is assigned by the ZigBee coordinator, and the dynamic address is associated with the unique MAC address of the ZigBee router;

S13: The ZigBee coordinator is used as an RFID reader, and the approach or departure of the PEV to the charging pile is identified by the received signal strength indication RSSI from the ZigBee router.

It can be seen that this method establishes a ZigBee mesh network, which consists of a ZigBee router located on a pure electric vehicle PEV and a ZigBee coordinator located on a charging pile to form a ZigBee mesh network, and the ZigBee router is used as an RFID tag. The tag, and the ZigBee coordinator is used as an RFID reader, and the RSSI from the ZigBee router is used to identify the approach or departure of the pure electric vehicle PEV to the charging pile, that is, the approach or departure of the pure electric vehicle PEV to the charging pile can be identified. In this way, the ZigBee mesh network and RFID identification and verification methods are used to provide a robust connection between the pure electric vehicle PEV and the charging pile, complete the charging pile communication, realize the mutual communication between the charging pile and the pure electric vehicle PEV, and improve the pure electric vehicle PEV. The speed and ease of charging your car.

Based on the above method, specifically, the VMM further includes an MSP430 microcontroller and a CC2530 radio frequency transceiver.

Among them, MSP430 microcontroller and CC2530 RF transceiver are used to communicate with ZigBee coordinator.

Among them, associating the dynamic address with the unique MAC address of the ZigBee router is to bind the dynamic address with the unique MAC address of the ZigBee router to establish an association relationship.

Further, the above method further includes: retrieving the MAC address of the ZigBee router, retrieving the authorized user, and detecting the plug-in state of the PEV. The MAC address of the ZigBee router is the tag ID.

Among them, the plug-in state of the PEV is used to identify the existence of the PEV in the charging station, and associate the ID of the PEV with the designated charging point. Among them, associating the ID of the PEV with the specified charging point is to bind the ID of the PEV with the specified charging point to establish an association relationship.

Further, the above method further includes: using an RFID reader to perform charging identity authentication.

Among them, the process of using the RFID reader for charging identity authentication specifically includes:

S1: Send an instruction through the server, and use the instruction sent by the server to check the newly arrived pure electric vehicle PEV within a preset time interval;

S2: When the RFID reader is initialized, the server sends the "RGST" command to check whether a new ZigBee router's MAC address is registered;

S3: Use the "STAT" command to identify whether the newly arrived pure electric vehicle PEV in the charging station is blocked;

S4: Use the plug-in state of the pure electric vehicle PEV in the charging station to identify the existence of the pure electric vehicle PEV in the charging station, and associate the ID of the pure electric vehicle PEV existing in the charging station with the designated charging point;

S5: If the MAC address of the ZigBee router corresponds to the authorized user account stored in the database, the server sends an enable charging command to start the pure electric vehicle PEV existing in the charging station for charging.

Among them, the format of the server command to the charging pile is: COMD[command][channel][parameter].

Specifically, in the method, the method further includes: using the ZigBee coordinator as an RFID reader, and identifying the approach or departure of the PEV through the RSSI of the received signal strength indication from the ZigBee terminal device.

The invention can accurately and effectively realize the communication of charging piles, adopts ZigBee mesh network and RFID authentication and authorization methods, on the one hand, it has the advantage of using existing hardware without extra cost, and on the other hand, it provides electric vehicles and charging piles. robust connection. ZigBee routers, also known as ZigBee devices, associate the dynamic address with the unique MAC address of the ZigBee router, that is, associate the dynamic address with the unique MAC address of the ZigBee device.

The Virtual Machine Monitor VMM is a vehicle monitoring/identification module equipped with an MSP430 microcontroller and CC2530 RF transceiver for communication with the network coordinator node. The RFID tag is processed by a vehicle monitoring/identification module or VMM located in the PEV, called VMM processing, and the RFID tag is used together with the MAC address of the ZigBee device as a unique identifier. In addition, the VMM can be converted into a remote sensor whose status can be monitored via the PEV's CAN bus.

In summary, the present invention provides a ZigBee mesh network-based charging pile RFID communication method, which utilizes the ZigBee router in the virtual machine monitor VMM located on the pure electric vehicle PEV and the ZigBee coordinator located on the charging pile to form ZigBee Mesh network; use the ZigBee router as an RFID tag, and assign a 16-bit dynamic address by the ZigBee coordinator, and associate the dynamic address with the ZigBee router's unique MAC address; use the ZigBee coordinator as an RFID reader, through the ZigBee router The received signal strength indicates RSSI to identify the approach or departure of the PEV to the charging pile. It can be seen that this method establishes a ZigBee mesh network, which consists of a ZigBee router located on a pure electric vehicle PEV and a ZigBee coordinator located on a charging pile to form a ZigBee mesh network, and the ZigBee router is used as an RFID tag. The tag, using the ZigBee coordinator as an RFID reader, identifies the approach or departure of the PEV to the charging pile through the RSSI from the ZigBee router, that is, it can identify the approach or departure of the PEV to the charging pile. In this way, the ZigBee mesh network and RFID identification and verification methods are used to provide a robust connection between pure electric vehicle PEVs and charging piles, complete the communication of charging piles, realize mutual communication between charging piles and pure electric vehicle PEVs, and improve pure electric vehicles. The speed and ease of charging.

A ZigBee mesh network-based RFID communication method for charging piles provided by the present invention is described above in detail. The principles and implementations of the present invention are described herein by using specific examples, and the descriptions of the above embodiments are only used to help understand the method and the core idea of the present invention. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can also be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims (6)

1. a charging pile RFID communication method based on ZigBee mesh network, is characterized in that, comprises: The ZigBee mesh network is formed by using the ZigBee router in the virtual machine monitor VMM located on the pure electric vehicle PEV and the ZigBee coordinator located on the charging pile; Taking the ZigBee router as an RFID tag, a 16-bit dynamic address is assigned by the ZigBee coordinator, and the dynamic address is associated with the unique MAC address of the ZigBee router; The ZigBee coordinator is used as an RFID reader to identify the approach or departure of the PEV to the charging pile through the RSSI of the received signal strength indication from the ZigBee router; The MAC address of the ZigBee router is retrieved, the authorized user is retrieved, and the plug-in status of the PEV is detected. 2. The method of claim 1, wherein the VMM further comprises an MSP430 microcontroller and a CC2530 radio frequency transceiver. 3. The method of claim 2, wherein the MSP430 microcontroller and the CC2530 radio frequency transceiver are used to communicate with a ZigBee coordinator. 4. The method of claim 1, wherein the plug-in status of the PEV is used to identify the presence of the PEV in a charging station and to associate the ID of the PEV with a designated charging point. 5. The method of claim 1, further comprising: Use RFID reader for charging identity authentication. 6. The method of claim 5, wherein the charging identity authentication using an RFID reader comprises: Send instructions through the server, and use the instructions sent by the server to check the newly arrived pure electric vehicle PEV within a preset time interval; When the RFID reader is initialized, the server sends the "RGST" command to check if a new ZigBee router's MAC address is registered; Use the "STAT" command to identify whether the newly arrived pure electric vehicle PEV in the charging station is blocked; Use the plug-in state of the pure electric vehicle PEV in the charging station to identify the existence of the pure electric vehicle PEV in the charging station, and associate the ID of the pure electric vehicle PEV existing in the charging station with the designated charging point; If the MAC address of the ZigBee router corresponds to the authorized user account stored in the database, the server sends an enable charging command to start the pure electric vehicle PEV existing in the charging station for charging.

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