CN203623562U

CN203623562U - Electric vehicle license plate based on ultrahigh frequency RFID remote reading

Info

Publication number: CN203623562U
Application number: CN201320658125.4U
Authority: CN
Inventors: 不公告发明人
Original assignee: SHANGHAI MERITAG INTELLIGENT RECOGNITION SYSTEM CO Ltd
Current assignee: SHANGHAI MERITAG INTELLIGENT RECOGNITION SYSTEM CO Ltd
Priority date: 2013-10-23
Filing date: 2013-10-23
Publication date: 2014-06-04
Anticipated expiration: 2023-10-23

Abstract

An electric vehicle license plate based on ultrahigh frequency RFID remote reading comprises a composite layer coated with reflecting materials, an antenna radiating surface, an FR4 base material, an antenna ground plane, an ultrahigh frequency RFID chip and epoxy resin protecting the ultrahigh frequency RFID chip. A positive electrode and a negative electrode of the ultrahigh frequency RFID chip are connected with the antenna radiating surface through feeder lines, the antenna radiating surface is connected with the antenna ground plane isolated from the antenna radiating surface by the base material through one or a row of feed holes, the composite layer coated with the reflecting materials and the antenna radiating surface are overlapped, people and equipment can achieve optical identification through the reflecting materials when light is insufficient, and therefore the electric vehicle license plate based on ultrahigh frequency RFID remote reading is formed.

Description

The electric vehicle license plate reading at a distance based on ultrahigh frequency RFID

Technical field

The utility model relates to a kind of ultrahigh frequency electronic tag, the electric vehicle license plate specifically reading at a distance based on ultrahigh frequency RFID.

Background technology

RFID is English (the Radio Frequency Identification of REID, RFID) abbreviation, claim again electronic tag, REID is to start a kind of automatic identification technology of rising the nineties in 20th century, and REID is one and utilizes radiofrequency signal to pass through Space Coupling (alternating magnetic field or electromagnetic field) to realize the transmission of no touch information and pass through transmitted information the technology that reaches identifying purpose.

Radio RF recognition technology (RFID) has become the topic of an awfully hot door.Prediction according to the insiders, the business opportunity of 30 to 10,000,000,000 U.S. dollars will be brought in RFID technical market in the coming five years in new product and service, the thing followed also has server, data storage system, data bank program, business management software, consulting services, and the huge demand of other computer basics construction.Perhaps these predictions are too optimistic, but RFID will become following great market, there is no question about.The special software and hardware of RFID is being stepped up to develop in many high-tech companies, these companies comprise Intel, Microsoft, the inscriptions on bones or tortoise shells, SAP and SUN, and the maximum retailer Wal-Mart in the whole world was just used this technology on single-piece commodity as far back as 2006, therefore can say that radio RF recognition technology (RFID) is becoming global popular new science and technology.

RFID also obtains practical application in a lot of fields of China, comprises logistics, tobacco, medicine, cermet of identification, Olympic Games admission ticket, Expo admission ticket, pet management etc., but with regard to our daily life impression, as RFID or far from us.Except China second-generation identity card, we are also difficult to often experience the existence of RFID in our life.This is that reason is very simple in fact for what reason on earth, although RFID obtains practical application in every field just fast, but with respect to the cost-saving scale of our country, its field of application also reaches far away degree widely, even if apply many communication and logistics industries at RFID, the state in a distribution yet, and could not reach the state of face.Leader enterprise in industry attempts adopting this up-to-date technology for keeping its competitive position to take the lead in often, and more enterprise also has the attitude of looking around and hesitating in arms.Or take material flow industry as example, applying RFID technology can significantly improve Logistics Operation efficiency, go out entry time as accelerated goods, reduce site operation personnel, realize quick and accurate stock-taking, realize goods and accurately locate tracking etc.Premier Wen Jiabao has clearly proposed in 11 National People's Congress do State Council's government work report will be using Internet of Things industry as following new growth engines, and the core technology background of Internet of Things is RFID technology

Electric vehicle license plate is because size is smaller, public security traffic control department is difficult for following the trail of for the equipment of automobile control at present, cause current battery-driven car to be stolen and rob seriously, case-solving rate is lower. and this utility model can help public security department's actv. to carry out management and control to battery-driven car, make public security department obtain providing powerful support for of Intelligent traffic management systems, really realize digitalisation, intelligentized traffic and security administration.

Utility model content

Content of the present utility model, exactly in order to solve technical barrier above, for the application of electric motor intelligent monitoring under round-the-clock environment provides a kind of small-sized passive ultrahigh frequency electronic electric vehicle license plate economical and practical simple in structure of high reliability.

The utility model in order to achieve the above object; the technical scheme adopting is to provide a kind of electric vehicle license plate reading at a distance based on ultrahigh frequency RFID; comprise the composite bed 1 of attached reflex-reflective material; aerial radiation face 2, connection of antenna ground 4, is placed in the superhigh frequency chip 6 of aerial radiation face; FR4 base material 3; the epoxy resin 5 of protection chip, via 8, rivet hole 7.Superhigh frequency chip 6 both positive and negative polarities are connected with aerial radiation face 2 by feeder line; Aerial radiation face 2 is arranged via 8 by one or one and is connected with the connection of antenna ground 4 being isolated by FR4 base material 3; On aerial radiation face 2, cover attached reflex-reflective material composite bed 1, reach intelligent and visual unification.

RFID car plate label of the present utility model structure described above, according to the principle of work of microstrip antenna, the ultra-high frequency signal that aerial radiation face receives external reader transmitting activates ultrahigh frequency RFID chip, according to determining of the frequency of operation 915MHz of electronic tag, the length of the radiating surface of microstrip antenna is limited by its wavelength, and the area of the aerial radiation face of so last design reduces greatly.Can find out from the structure of the RFID car plate label of above-mentioned utility model, it is simple in structure, and production technology is basic similar with ripe at present multilayer printed circuit board (PCB) manufacture craft, and this has brought facility for follow-up production in enormous quantities.

Accompanying drawing explanation

Fig. 1 is the External view of the utility model RFID car plate label one embodiment;

Fig. 2 is the sectional structure chart of the utility model RFID car plate label one embodiment;

Fig. 3 is the utility model RFID car plate label one embodiment aerial radiation surface antenna design drawing.

The specific embodiment

Illustrate further the architectural feature of the utility model RFID car plate label below in conjunction with accompanying drawing.

As Fig. 1, Fig. 2, shown in Fig. 3, RFID label of the present utility model comprises: the composite bed 1 of attached reflex-reflective material; aerial radiation face 2, connection of antenna ground 4, is placed in the superhigh frequency chip 6 of aerial radiation face, FR4 base material 3; the epoxy resin 5 of protection chip, via 8, rivet hole 7.

In the present embodiment, the aerial radiation face 2 of microstrip antenna, connection of antenna ground 4 form by Copper Foil, are conductor sheet.It between aerial radiation face and connection of antenna ground, has encouraged radio frequency electromagnetic field by via, and by aerial radiation towards external irradiation electromagnetic wave.

This antenna (as Fig. 1,2,3) in the utility model, finds according to experimental result, the thickness of FR4 base material 3 is greater than 2.5mm at least,, could reduce as much as possible like this loss of antenna energy.Copper is covered on two sides at base material simultaneously, the aerial radiation face that one side is the microstrip antenna that designs, and another side is seated in whole the ground plane as microstrip antenna above the base material of aerial radiation, forms final antenna.

In the present embodiment, feed is completed by row's via 8, the position of through hole, and size depends on graph position and the size of aerial radiation face, and has direct associated with the input impedance of superhigh frequency chip.In the time that the radio frequency signal frequency on feeder line changes, the resistance value of whole antenna also changes thereupon, therefore, suitable signal feed-in mode and the consideration of impedance match can make whole antenna in the time of resonance frequency, all projectile energies can as much as possiblely radiate, and whole Antenna Design carries out simulation calculation and simplation verification by Ansoft HFSS simulation software.

In the present embodiment, can pass through rivet hole 7 by the electric vehicle license plate reading at a distance based on ultrahigh frequency RFID, use spiral nail, rivet, magnet is fixed, and also can use strong adhesive or double faced adhesive tape to be fixed.

Claims

1. the electric vehicle license plate reading at a distance based on ultrahigh frequency RFID, is characterized in that:

By composite bed, aerial radiation face, FR4 base material, the connection of antenna ground of attached reflex-reflective material, the epoxy resin of superhigh frequency chip and protection chip forms; Chip is connected with aerial radiation face, is seated in above base material; Connection of antenna ground is positioned at the another side of base material, and as the back side of electronic tag, directly contact is used the surface of the metallic material of electronic tag; Via is arranged on base material, and aerial radiation face is connected with connection of antenna ground by this via.

2. the electric vehicle license plate reading at a distance based on ultrahigh frequency RFID according to claim 1, is characterized in that superhigh frequency chip 0.5mm under radiating surface, and there is epoxy resin protection outside, in use can play the effect of protection chip.