TWI455070B - Electronic detection gate - Google Patents

Description

Electronic detection door

The present invention relates to an electronic detection door. More specifically, the present invention relates to an electronic detection gate with an adjustable read range.

With the development of Radio Frequency Identification (RFID) technology becoming more and more mature, the application of various RFID technologies is becoming more and more popular. Because RFID technology has the advantages of wireless, fast and large-scale reading and identification, electronic using RFID technology The detection door has been gradually favored by merchants and enterprises, and is widely used in anti-theft, warehousing management and checkout systems.

In general, most of the electronic detection gates using RFID technology use a 13.56 MHz Near Field Communication (NFC) antenna, which has the disadvantage that the communication distance is limited to 20 cm; therefore, the width of the general store doorway It is often necessary to provide more than two sensing gates to cover a wider reading range, which will result in cost increase and inconvenience. On the other hand, a general electronic detection door cannot control and adjust the reading range of its antenna; therefore, when an item carrying an electronic tag is near the periphery of the electronic detection door, it will be detected even if it does not pass the electronic detection door. The measurement and reading cause the false alarm to be caused, which causes inconvenience in practical application.

In summary, how to provide an electronic detection door with long-distance detection capability and precise adjustment and control of the reading range is an urgent problem for the technicians in the field.

It is an object of the present invention to provide an electronic detection gate. The electronic detection door has a first side and a second side, and includes a rotation angle adjuster, a pointing antenna and a shielding surface. The directional antenna is fixed to the rotation angle adjuster and directed to the first side, and has a reading range; the shielding surface is disposed on the second side for shielding the reading range; wherein the turning angle is adjusted The device is used to adjust the read range.

The electronic detection door of the invention is configured to fix the pointing antenna to the rotation angle adjuster and the shielding surface behind the pointing antenna; thus, the pointing direction and the reading of the antenna can be adjusted through the angle adjusting device. Range, while shielding the reading range of the directional antenna by the shielding surface. Therefore, the present invention overcomes the disadvantages of the prior art that when an article carrying an electronic tag is placed close to the periphery of the electronic detection door, even if the electronic detection door is not passed, it is detected and read, resulting in a false alarm. At the same time, it has the advantages of long-distance reading range and adjustable reading range.

Other objects of the present invention, as well as the technical means and embodiments of the present invention, will be apparent to those of ordinary skill in the art.

The present invention is not limited by the embodiments, and the embodiments of the present invention are not intended to limit the invention to any specific environment, application or special mode as described in the embodiments. Therefore, the description of the embodiments is merely illustrative of the invention and is not intended to limit the invention. It should be noted that in the following embodiments and drawings, elements that are not directly related to the present invention have been omitted and are not shown, and the dimensional relationships between the elements in the drawings are merely for ease of understanding and are not intended to limit the actual ratio.

A first embodiment of the present invention is an electronic detection gate 1, the schematic of which is depicted in Figures 1A-1B. The electronic detection door 1 has a first side 1a and a second side 1b, and includes a warning device 11, a rotation angle adjuster 13, a pointing antenna 15, a reading device 17, and a shielding surface 19. The first side surface 1a and the second side surface 1b are side surfaces parallel to the yz plane. The warning device 11 is disposed on the top of the electronic detection door 1 and is electrically connected to the reading device 17 through a transmission line (not shown). The rotation angle adjuster 13 is fixed on the second side 1b of the electronic detection door 1; the directional antenna 15 is fixed to the rotation angle adjuster 13 and electrically connected to the reading device 17 through the transmission line 16; The device 17 is disposed at the bottom of the electronic detection door 1; the shielding surface 19 is disposed at the second side 1b.

The directional antenna 15 is operated in an ultra high frequency (UHF) frequency band and has a radiation field type and a reading range, the radiation field type having a directivity and pointing to the first side 1a, The reading range is determined depending on the radiation range of the directional antenna 15. The directional antenna 15 can be a planar printed antenna or any other form of antenna, and a plurality of directional antennas 15 can be disposed on the electronic detection gate 1 as needed, and the scope of the present invention is not limited by the embodiment of the antenna.

In general, conventional electronic detection doors cannot adjust and control the reading range, resulting in inconvenience and misjudgment in use. Accordingly, the electronic detection door 1 of the present invention further includes a rotation angle adjuster 13, please refer to FIG. 2, which is a top view of the electronic detection door 1. The rotation angle adjuster 13 is configured to provide a rotation angle θ so that the directional antenna 15 fixed to the rotation angle adjuster 13 can be turned to the θ angle.

Since the radiation pattern and direction of the directional antenna 15 are determined according to the design of the antenna; therefore, the antenna must be redesigned to change the radiation pattern and direction of the antenna, thus increasing the difficulty of the antenna design. With cost. Accordingly, the present invention provides a rotation angle θ through the rotation angle adjuster 13 to turn the directional antenna 15 to the θ angle, thereby changing the pointing direction of the directional antenna 15 to adjust the reading range of the directional antenna 15. Where θ ranges from 10 degrees to 40 degrees, but is not limited thereto. If the electronic detection gate 1 is provided with a plurality of directional antennas 15, the rotation angle θ provided by the rotation angle adjuster 13 of each directional antenna 15 may be different angles.

On the other hand, since the radiation of the antenna has a fringing effect, the radiation range of the antenna disposed in the electronic detection gate often coincides with the rear of the electronic detection gate. In order to improve the effect, the electronic detection door 1 of the present invention further includes a shielding surface 19 disposed on the second side surface 1b behind the directional antenna 15, wherein the shielding surface 19 is a metal surface made of a metal material. The shielding range of the directional antenna 15 is shielded by the shielding effect of the metal so that the reading range of the directional antenna 15 does not reach the area behind the electronic detecting gate 1.

Next, how the electronic detection gate of the present invention operates will be described. Please refer to FIG. 3, which is a schematic diagram of the reading range of the electronic detection door. In an actual application, the electronic detection door 1 and an electronic detection door 3 can be disposed on both sides of an entrance and exit. The electronic detection door 3 includes a rotation angle adjuster 33 and a same as the electronic detection door 1. The directional antenna 35 and a shielding surface are electrically connected to the reading device 17 through a transmission line (not shown).

The directional antenna 15 and the directional antenna 35 respectively have a read range 150 and a read range 350, that is, a range surrounded by a broken line shown in FIG. When the article carrying the electronic tag enters the reading range 150 or the reading range 350, the pointing antenna 15 and the pointing antenna 35 can read the tag information of the electronic tag and transmit the tag information to the reading. The device 17, the reading device 17 generates a interpretation result based on the tag information. Further, the reading device 17 can drive the alert device 11 based on the interpretation result. The warning device 11 can be a buzzer, a warning light, or other device that can be used to issue an alert message, and combinations thereof. The present invention does not limit the implementation of the alert device 11.

Adjusting the coverage area of the reading range 150 and the reading range 350 by the rotation angle adjuster 13 and the rotation angle adjuster 33 enables the electronic detection door 1 and an electronic detection door 3 to be inside the entrance and exit (ie, the -y direction). The range of the read overflow is reduced, thereby avoiding the misjudgment caused by the excessive overflow of the electronic detection gate when the electronic tag located inside the entrance and exit is close to the electronic detection gate. In this embodiment, the readover overflow distance D of the electronic detection gate 1 and the electronic detection gate 3 on the inner side of the entrance and exit is between 5 cm and 60 cm, and the read overflow distance outside the entrance and exit is up to 1 meter to 9 meters; in other embodiments, the angle adjuster 13 and the angle adjuster 33 can be adjusted according to actual application requirements to determine the size of the read overflow distance D.

On the other hand, since the directional antenna 15 and the directional antenna 35 of the present invention operate in the UHF band, they have a large reading range. Specifically, the distance W between the electronic detection gate 1 and the electronic detection gate 3 can be between 0.5 meters and 6 meters. In practical applications, only the electronic detection gates 1 need to be disposed on both sides of the entrance and exit. And the electronic detection door 3 can cover the width of the general entrance and exit. Further, the reading range of the directional antenna 15 and the directional antenna 35 also increases as the output power of the reading device 17 increases, so that the magnitude of the output power of the reading device 17 can be adjusted depending on the actual application.

It should be particularly noted that in the embodiment, the angle adjuster 13 is an angle fixed fixture; in other embodiments, the angle adjuster 13 can also be a variable angle bracket, mechanical structure or the like. The provision of an angled device does not limit the scope of the invention by the implementation of the angle adjuster 13. In addition, the angle adjuster 13 can be made of plastic, metal, styrofoam or other materials, and the material of the angle adjuster 13 is also not limited to the scope of the present invention.

The electronic detection gate of the present invention can be combined with a Radio Frequency Identification (RFID) tag to establish an anti-theft system. A specific example will be described below. When applied to a store, the electronic detection door 1 and the electronic detection door 3 of the present invention can be disposed at the door of the store, and an RFID tag is attached to each product, and each RFID tag has a tag information. For example, the tag information is a 16-digit code, ranging from "00000000" to "FFFFFFFF". If a product belongs to an unpaid or unlicensed item, the tag information is The 3rd digit and the 4th digit are preset to 9, for example, "00991234".

When a product enters the reading range of the directional antenna 15 or the directional antenna 35, the directional antenna 15 and the directional antenna 35 can read a tag information in the RFID tag on the product, and transmit the tag information to The device 17 is read. Next, the reading device 17 determines whether the third digit and the fourth digit are both 9 based on the tag information. If not, it means that the product has been checked out or can be carried out of the store, the reading device 17 does not drive the warning device 11; if so, it indicates that the product is not checked out or cannot be taken out of the store, the reading device 17 drives the warning Device 11.

In addition to the application of the above anti-theft system, the electronic detection door of the present invention is more applicable to, for example, a storage system. Similarly, the electronic detection door 1 and the electronic detection door 3 of the present invention can be arranged at a warehouse entrance and exit, and the RFID tags carried on the goods can be used for the control and detection of the goods in and out. In addition, the electronic detection door of the present invention can be used in conjunction with a checkout system, and the checkout system transmits the checked goods information to the electronic detection door, and the electronic detection door can be judged according to the information of the checkout system. Whether a product can carry an electronic detection door.

In summary, the present invention provides an antenna for operating in the UHF band in the electronic detection gate, and the antenna is fixed to the angle adjuster, and a shielding surface is disposed behind the antenna; thus, it is transparent. The angle adjuster adjusts the pointing direction and the reading range of the antenna, and avoids the reading range and the rear of the electronic detecting door by the shielding surface. Therefore, the present invention overcomes the disadvantages of the prior art that when an article carrying an electronic tag is placed close to the periphery of the electronic detection door, even if the electronic detection door is not passed, it is detected and read, resulting in a false alarm. At the same time, it has the advantages of long-distance reading range and adjustable reading range.

The embodiments described above are only intended to illustrate the embodiments of the present invention, and to explain the technical features of the present invention, and are not intended to limit the scope of protection of the present invention. Any changes or equivalents that can be easily made by those skilled in the art are within the scope of the invention. The scope of the invention should be determined by the scope of the claims.

1. . . Electronic detection door

1a. . . First side

1b. . . Second side

11. . . Warning device

13. . . Angle adjuster

15. . . Point antenna

150. . . Reading range

16. . . Transmission line

17. . . Reading device

19. . . Shielding surface

3. . . Electronic detection door

33. . . Angle adjuster

35. . . Point antenna

350. . . Reading range

1A-1B is a schematic view of a first embodiment of the present invention;

Figure 2 is a plan view of a first embodiment of the present invention;

Fig. 3 is a schematic view showing the reading range of the first embodiment of the present invention.

1. . . Electronic detection door

1a. . . First side

1b. . . Second side

11. . . Warning device

13. . . Angle adjuster

15. . . Point antenna

16. . . Transmission line

17. . . Reading device

Claims (7)

An electronic detection door has a first side and a second side, and includes:
One turn angle adjuster;
a directional antenna fixed to the angle adjuster and directed to the first side and having a reading range; and a shielding surface disposed on the second side for shielding the reading range;
Wherein, the angle adjuster is used to adjust the reading range. The electronic detection gate of claim 1, wherein the directional antenna is operated in an Ultra High Frequency (UHF) frequency band. The electronic detection door of claim 1, wherein the angle adjuster has an angle that causes the directional antenna to adjust the reading range according to the angle. The electronic detection door of claim 1, wherein the angle adjuster is fixed to the second side. The electronic detection door of claim 1, wherein the shielding surface is a metal surface. The electronic detection device of claim 1, further comprising a reading device, wherein the pointing antenna is configured to receive a tag information, and the reading device is electrically connected to the pointing antenna for generating information according to the tag information. One judged the result. The electronic detection device of claim 6, further comprising an alerting unit electrically connected to the reading device, wherein the reading device is further configured to drive the alerting unit according to the interpretation result.