CN202838472U

CN202838472U - Blind zone free access device for reading RFID (radio frequency identification device) tag

Info

Publication number: CN202838472U
Application number: CN 201220041409
Authority: CN
Inventors: 刘镕畅; 刘永; 邱义波
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-02-09
Filing date: 2012-02-09
Publication date: 2013-03-27
Anticipated expiration: 2022-02-09

Abstract

The utility model discloses a blind zone free access device for reading RFID tags. The device mainly comprises an RFID reading antenna, a controller, a data transmission interface, a support frame for the RFID reading antenna and a control computer. The blind zone free access device for reading the RFID taps is arranged on both sides of a channel or a gate, and by reading the data of the RFID tags sticked on goods and though the real-time communication between the data transmission interface and the control computer, obtains the informations that whether the detected goods are permitted to move in and out, thereby achieving the functions of access control and alarm. The existing access control device comprises two common installing method, one is to arrange the antenna access control channels on both sides of the door, due to the limits of the height of the access control, the installation position of antenna and the fixing position of the access control, when the detected goods are beyond a certain height, the RFID reading affected by the natural character of the antenna that the angle between the RFID reading antenna and the tags makes a big difference to the read rate of reading the RFID tags of the antenna appears usually the blind reading spot to cause the reading omission and reducing the using effect of the access control; the other is to suspend the access control above the channel door, through the method, the range of the blind zone can be reduced, but under the limit of the installation position, the reading blind zone of the tags still exists. By adjusting and combining the installation position of the RFID reading antenna, the blind zone free access device for reading the RFID tag avoids the reading omission of reading the RFID tag of the access control.

Description

A kind of RFID label reads the entrance guard device of non-blind area

Technical field

This device relates to RFID antenna, RFID control, belongs to the less radio-frequency field, and device is widely used in the entrance guard management of gate and passage.

Background technology

The RFID radio-frequency (RF) identification is a kind of contactless automatic identification technology, and it is automatically identified destination object and obtain related data by radiofrequency signal, and identification work need not manual intervention, can work in various rugged surroundings.The RFID technology can be identified high-speed moving object and can identify simultaneously a plurality of labels, and is swift and convenient to operate.Gate control system is a kind of new-modernization personnel of automatic identification technology, Simple Multicast Routing Protocol of article of utilizing, it adopts radio-frequency (RF) identification (RF ID:Radio Freqrency Identification) technology advanced on the market, it is worn personnel, article and sticks on the RFID label, read the data of RFID by RFID read-write antenna among the gate inhibition, combine with the management system of computerized control system, realize room entry/exit management and control to personnel, article.

Because the impact of gate inhibition's installation method, installation site, the design of RFID read-write antenna self, the problem that exists on particularly gate inhibition's design, the installation method, the blind area that when reading the RFID label, can exist the RFID label to read, as shown in Figure 2, because the existence of blind area, the phenomenon that skip will occur, the management of personnel, article will start a leak.This method invention by the research to RFID read-write antenna parameter, is used the method for adjusting RFID read-write aerial angle, has solved the blind zone problem that the RFID label data reads.

Summary of the invention

The present invention is the entrance guard device that a kind of RFID label reads non-blind area, and device mainly is comprised of RFID read-write antenna, controller, data transmission interface, RFID read-write antenna fixing stand and control computer.

For guaranteeing important place facility and personal security and preventing that the stolen of article from giving away secrets, each important place is all formulated safety management system and is taked certain Safety Management Measures according to own characteristic, and RFID gate inhibition's technology is widely used in the management of escape way.But because the own characteristic of RFID label read-write apparatus, as shown in Figure 2, the RFID label read-write apparatus is when reading tag data, have the blind area of reading of an angle, blind area part in Fig. 2 RFID card-reading apparatus read write tag data signals, when label in this band of position, the phenomenon of label data skip will appear, label skip blind area will appear in some zone at passage and gate in the gate inhibition who uses the RFID technology to form, as shown in Figure 1.

The present invention mainly reads existing skip blind area according to RFID label shown in Figure 2, by changing the angle of RFID tag reader, adjusts the position of blind area, solves the phenomenon of reading tag blind area.The concrete grammar of apparatus of the present invention is that entrance guard device is comprised of four RFID label reading antennas, every side door is prohibited 2 RFID labels read-writes of use antennas, four RFID antennas are unified centralized control by the RFID controller, and each antenna is carried out the data acquisition modes that polling data reads.

The label data that entrance guard device of the present invention reads is realized interactive communication and the instruction judgement of data by data transmission interface and control computer.RFID label read-write antenna in the entrance guard device, fixing is installed in the antenna fixing stand, fixed installation RFID read-write antenna, can can carry out around the axis of antenna the rotation adjustment of certain angle, such as Fig. 3 without shown in the RFID entrance guard device schematic diagram that receives the blind area, A and B are that RFID label read-write antenna installation fixing position is put, A and B antenna are fixed on gate inhibition's support, the A1A2 axis of A antenna can be around support bracket fastened vertical direction, the angle of A antenna can be adjusted around the rotation of A1A1 axle, shown in the A1A2 axle of A antenna among Fig. 3, the B1B2 axis of B antenna can be around support bracket fastened horizontal direction, the angle of B antenna can be adjusted around the B1B2 middle shaft rotation, shown in the B1B2 axle of B antenna among Fig. 3.

After entrance guard device support of the present invention is installed and fixed, by adjusting the orientation angle of A antenna and B antenna, just can stop the blind area of reading of RFID label read-write antenna excessively fully.　　　

Description of drawings

Fig. 1, gate inhibition's structure installation site schematic diagram.

Fig. 2, the signal of RFID card-reading apparatus read write tag data.

Fig. 3, nothing receive the RFID entrance guard device schematic diagram of blind area.

Embodiment

Concrete typical an application is installed gate inhibition's gate or the suitable antenna holder fixed position of channel selecting at needs, fixedly gate inhibition's antenna holder is installed RFID label read-write antenna, and concrete installation method as shown in Figure 3.Behind mounting and fixing bracket and the RFID label read-write antenna, as shown in Figure 3, at first adjust the RFID label read-write antenna of bottom, the method of adjusting is according to the B1B2 axle, adjust the level angle of RFID read-write antenna, actual reading tag data is eliminated the blind area of gate inhibition bottom, as shown in Figure 1, eliminate the blind area of reading of bottom, gate among Fig. 1.After bottom RFID read-write aerial angle is adjusted, after the same method, adjust the RFID label read-write antenna on top, the same vertical angle of adjusting top RFID label read-write antenna, the method of using physical tags to read, the blind area is read on top shown in Fig. 1 eliminate, finish the Installation and Debugging of whole device.The present invention's dress can be applied in the occasion of all suitable access control management widely.　　　

Claims

1. a RFID label reads the entrance guard device of non-blind area, mainly formed by RFID read-write antenna, RFID read-write controller, data transmission interface, RFID read-write antenna fixing stand and control computer, it is characterized in that: this device uses the RFID read-write controller of four-way to connect and controls four RFID read-write antennas, RFID read-write antenna divides two groups to be installed on a pair of gate inhibition by RFID read-write antenna fixing stand, and two RFID read-write antennas are installed among each gate inhibition.

2. a kind of RFID label according to claim 1 reads the entrance guard device of non-blind area, it is characterized in that having adopted four-way RFID read-write controller, realization is to the data transmit-receive of four RFID read-write antennas, and the RFID read-write controller adopts poll to read successively the mode of RFID read-write antenna.

3. a kind of RFID label according to claim 1 reads the entrance guard device of non-blind area, it is characterized in that having four RFID read-write antennas, be installed in respectively on the gate inhibition of both sides by RFID read-write antenna fixing stand, each side door is prohibited two RFID read-writes of installation antennas in the support, antenna is instantaneous can only have a RFID antenna in running order for RFID read-write, and its state is by the control of RFID read-write controller.

4. a kind of RFID label according to claim 1 reads the entrance guard device of non-blind area, certain effective read range is arranged when it is characterized in that RFID read-write antenna read-write RFID label, the size of value range, to obtain according to concrete RFID antenna actual measurement, the installation site of RFID read-write antenna, angle directly affects to be read and write the RFID label.

5. a kind of RFID label according to claim 1 reads the entrance guard device of non-blind area, it is characterized in that two RFID read-write antennas that each side door is prohibited, setting angle on RFID gate inhibition's fixed support is mutually vertical, direction is respectively and gate inhibition's channel direction horizontal and vertical, the RFID reading antenna lays angle according to the actual conditions of gate and passage simultaneously, can regulate around the axis of antenna, avoid the blind area of RFID read-write antenna read write tag.