CN102707303A - Vehicle positioning device based on radio frequency identification (RFID) and global positioning system (GPS) - Google Patents

Abstract

The invention relates to a vehicle positioning device based on RFID and GPS. The device consists of an electronic tag and a vehicle locator. The electronic tag and the vehicle locator communicate through UHF signals. The vehicle locator consists of an RFID reader, a GPS receiver, a short-range wireless transceiver, a GPRS communication module and a microprocessor. , RFID reader, GPS receiver, short-distance wireless transceiver and GPRS communication module are respectively connected with the microprocessor, the vehicle calculates the error of GPS by reading the accurate position information stored in the electronic tag, and sends it through the short-distance wireless The transceiver broadcasts to adjacent vehicles to achieve accurate positioning of vehicles in the road network. The beneficial effects of the present invention can realize accurate positioning of vehicles, and can broadcast the position information, so that adjacent vehicles can update the position information synchronously.

Description

A vehicle positioning device based on RFID and GPS

technical field

The invention relates to the field of vehicle positioning, in particular to a vehicle positioning device based on RFID and GPS.

Background technique

With the increasing number of motor vehicles, problems such as vehicle management and vehicle operation safety have become increasingly prominent. How to solve such problems has become the focus of information construction. People expect to have a technology that can know the location information of vehicles in real time and provide them with security and guidance services throughout the whole process. The process of obtaining vehicle location information is called vehicle positioning. Global Positioning System (GPS) is currently the most widely used vehicle positioning technology. The vehicle positioning equipment and positioning method of the patent application with the application number of 201110169738.7 adopts GPS receiving module, GPRS wireless communication module, LCD and analog quantity, switch quantity data acquisition module respectively connected to the embedded processor to realize remote vehicle monitoring and collection of important parameters. However, there are some problems in the application of GPS: such as inaccurate positioning, GPS normal plane positioning error is 10-20 meters, if affected by many factors such as weather, US GPS policy, etc., sometimes it will be even larger; secondly, the coverage of GPS satellites The problem leads to the existence of receiving blind spots; in addition, GPS works in conjunction with maps, often resulting in huge errors in positioning and guidance due to untimely map updates. In order to solve the above problems, various auxiliary methods and devices based on GPS positioning have been proposed and implemented one by one. For example, the urban vehicle positioning road sign sensor of the patent application No. "Blind spot" positioning and navigation are accurate and reliable, but require the deployment of more sensors and higher costs.

Contents of the invention

The invention provides a vehicle positioning device based on RFID and GPS, which can overcome the existing problems in vehicle positioning and has the advantages of high precision and low cost.

The technical scheme adopted for realizing the object of the present invention is:

A vehicle positioning device based on RFID and GPS consists of an electronic tag and a vehicle locator. The electronic tag and the vehicle locator communicate through UHF signals. The vehicle locator consists of an RFID reader, a GPS receiver, and a short-range wireless transceiver. , GPRS communication module and microprocessor, RFID reader, GPS receiver, short-distance wireless transceiver and GPRS communication module are respectively connected with the microprocessor, and the vehicle within the communication range with the electronic tag can read the electronic tag The stored accurate location information calculates the GPS error and broadcasts it to adjacent vehicles through short-range wireless transceivers to achieve accurate positioning of vehicles in the road network.

The electronic label is installed on the road traffic information board.

The electronic tag is a passive electronic tag.

The short-distance wireless transceiver adopts the 802.11p communication protocol widely used in vehicle ad hoc networks.

The GPRS communication module is used to send the location information of the vehicle itself to the management/dispatching center, and at the same time receive the query from the management/dispatching center.

The beneficial effect of the invention is that it can realize accurate positioning of the vehicle, broadcast the position information, and enable adjacent vehicles to update the position information synchronously. The results can be used in the management and scheduling of public transport vehicles and transport fleets, the safety protection of vehicles, and even the route guidance and planning of private vehicles.

Description of drawings

Fig. 1 is the structural block diagram of vehicle-mounted locator of the present invention;

Fig. 2 is a schematic diagram of an application embodiment of the present invention.

Detailed ways

Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

In Fig. 1, 101 is a microprocessor; 102 is an RFID reader; 103 is a GPS receiver; 104 is a short-distance wireless transceiver; 105 is a GPRS communication module. The RFID reader (102), the GPS receiver (103), the short-distance wireless transceiver (104) and the GPRS communication module (105) are respectively connected with the microprocessor (101).

In Fig. 2, 201 is a GPS satellite; 202 is an electronic label installed on a traffic information board; 203 and 204 are vehicles equipped with vehicle locators, wherein the vehicle (203) is within the communication range with the electronic label, and the vehicle ( 204) It is outside the communication range with the electronic tag; S1-S3 are three consecutive steps to realize vehicle positioning. In step S1, the vehicle (203) receives GPS location information; in step S2, the vehicle (203) is within the communication range with the electronic tag, reads the accurate location information stored in the electronic tag, and compares it with the GPS location received in step S1 The information is compared to calculate the GPS reception error; in step S3, the vehicle (203) broadcasts the GPS reception error calculated in step S2 through the short-distance wireless transceiver, and the vehicle (204) is in the short-distance distance of the vehicle (203) Within the wireless coverage range, use the GPS reception error sent by the vehicle (203) to correct its own position information.

Claims (5)

1. vehicle locating device based on RFID and GPS; It is characterized in that: device is made up of electronic tag and vehicle positioning device; Electronic tag and vehicle positioning device communicate through ultra-high frequency signal; The vehicle positioning device is made up of RFID reader, gps receiver, short-range wireless transceiver and GPRS communication module and microprocessor, and RFID reader, gps receiver, short-range wireless transceiver and GPRS communication module link to each other with microprocessor respectively.

2. a kind of vehicle locating device based on RFID and GPS according to claim 1 is characterized in that electronic tag is installed on the Traffic Information board.

3. a kind of vehicle locating device based on RFID and GPS according to claim 1 is characterized in that electronic tag is a passive electronic label.

4. a kind of vehicle locating device based on RFID and GPS according to claim 1 is characterized in that short-range wireless transceiver adopts the 802.11p communication protocol that is widely used in car self-organization network.

5. a kind of vehicle locating device based on RFID and GPS according to claim 1 is characterized in that the GPRS communication module is used for the positional information of vehicle self is sent to management/dispatching center, simultaneously the inquiry of receiving management/dispatching center.

Images