TWI499129B - Logistics system, rfid tag and antenna having the same - Google Patents

Description

Logistics system, radio frequency identification tag and its antenna

The disclosure relates to an antenna and a radio frequency identification (RFID) tag having the antenna.

Logistics system refers to the overall function of a certain function in a certain time and space, consisting of the materials to be transported and a number of mutually constrained dynamic elements including related equipment, transport tools, storage equipment, personnel and communication links. .

With the development of computer science and automation technology, logistics management systems have evolved from simple methods to automated management. In addition, since the main goal of the logistics system is to pursue time and space benefits, wireless communication plays an important role in the logistics system to increase the added value of the logistics system, especially the storage and transportation of the sales logistics system.

In the sales logistics system, container trucks are often used to carry containers, which are large metal boxes made of metal and used to protect and load goods, and the containers are in a sealed state during container transportation.

To effectively manage the time and space of the logistics system, the goods to be shipped are packaged in at least one box or box prior to shipping the containers, wherein the at least one box or box contains a radio frequency identification (RFID) tag. In addition, in order to effectively utilize the loading space of the container, the at least one box or box is closely stacked and placed in the container, and the refrigerating air conditioner of the container provides an ideal temperature and humidity environment inside the container to maintain the integrity of the cargo. . However, due to the At least one box or box is placed in the container in a high-density stack, plus the temperature and humidity inside the container and the metal material of the container itself. At this time, the internal environment of the container is a harsh one for wireless communication. The communication environment makes it impossible to avoid signal decay.

Therefore, in order to improve the foregoing problems, the present disclosure provides an antenna suitable for use in a harsh environment and a radio frequency identification (RFID) tag having the antenna.

An embodiment of the present disclosure discloses an antenna for a radio frequency identification (RFID) tag, the antenna including a curved metal piece, a first metal path, and a second metal path, wherein the first metal path and the second metal The path is two separate metal paths.

The first metal path is electrically coupled to the inner surface of the curved metal piece and the radio frequency identification tag, and the second metal path is configured to be electrically coupled to the curved metal piece and the wireless This internal circuit of the RFID tag.

One embodiment of the present disclosure discloses a radio frequency identification (RFID) tag including a substrate, an internal circuit on the substrate, and an antenna on the substrate. The antenna further includes a curved metal piece, a first metal path and a second metal path, wherein the first metal path and the second metal path are two separate metal paths, and the first metal path is electrically An internal circuit configured to be coupled to the curved metal piece and the RFID tag and the second metal path configured to be electrically coupled to the curved metal piece and the wireless This internal circuit of the RFID tag. One embodiment of the present disclosure discloses a logistics system in which one container has a plurality of cargo boxes, each of which has a radio frequency identification tag, and the logistics system includes at least one RFID tag reader And configured to transmit data with the radio frequency identification tag, wherein the radio frequency identification tag corresponds to one of the cargo boxes.

The radio frequency identification tag includes an antenna, the antenna further includes a curved metal piece, and the first metal path is electrically coupled to the curved metal piece and an internal circuit of the radio frequency identification tag and a first The two metal paths are configured to be electrically coupled to the curved metal piece and the internal circuit of the RFID tag, wherein the first metal path and the second metal path are two separate metal paths.

The technical features of the present disclosure have been briefly described above, so that a detailed description of the present disclosure will be better understood. Other technical features that form the subject matter of the claims of the present disclosure will be described below. It is to be understood by those of ordinary skill in the art that the present invention disclosed herein may be It is also to be understood by those of ordinary skill in the art that this invention is not limited to the spirit and scope of the disclosure disclosed in the appended claims.

The present disclosure provides an antenna and a radio frequency identification (RFID) tag having the antenna.

FIG. 1 is a schematic diagram of a radio frequency identification tag according to an embodiment of the present disclosure. As shown in FIG. 1 , the RFID tag 10 has a substrate 15 , an antenna 16 , and an internal circuit 18 . The substrate 15 can be, for example, a printed circuit board (PCB). In this embodiment, the shape of the substrate 15 may be a disk shape to correspond to the shape of the antenna 16. In one embodiment of the present disclosure, the substrate 15 can have a diameter of about 60 mm, and those skilled in the art will appreciate that the substrate 15 can be any shape or size.

The antenna 16 can be an arc-shaped distribution and is presented on the substrate 15 in the form of a printed circuit. The antenna 16 has a first end 16-1 to a second end 16-2 of a curved metal piece. On the substrate 15. In an embodiment of the present disclosure, the antenna 16 has an inner diameter of about 24 mm and a diameter other than 25 to 30 mm. In addition, the first end 16-1 and the second end 16-2 of the antenna 16 form a central angle with a center corresponding to the curved metal piece.

The angular variation of the central angle allows the antenna 16 to be of a different type. For example, a half circular antenna may have a central angle of 80 to 120 degrees, and a full circular antenna may have a central angle of 150 to 200 degrees. In the present embodiment, the central angle of the angle is about 120 degrees.

The antenna 16 further includes a first metal path 11 and a second metal path 12 electrically coupled to the internal circuit 18 of the RFID tag 10, wherein the first metal path and the second metal path are the substrate Two separate metal paths on 15 are respectively a feed point and a ground point, and vice versa. In this embodiment, each of the first metal path 11 and the second metal path 12 are coupled to the first end 16-1 of the curved metal piece 16 and the first One point between the two ends of 16-2.

FIG. 2 is a schematic diagram of a radio frequency identification tag 20 according to another embodiment of the disclosure. As shown in FIG. 2, the first end 26-1 of the curved metal piece 26 of the RFID tag 20 shown in FIG. 2 is compared to the radio frequency identification tag 10 shown in FIG. The two ends 26-2 are distributed on the circuit board 15, wherein the first end 26-1 and the second end 26-2 form a central angle with a center "O" corresponding to one of the curved metal pieces 26. , wherein the angle of the central angle is about 90 degrees.

The first metal path 11 and the second metal path 12 are coupled to the first end 26-1 of the curved metal piece and the second end 26-2. In this embodiment, The second metal path 12 is coupled to the second end 26-2. In other embodiments, the first metal path 11 is coupled to the first end 26-1.

3A and 3B are diagrams showing a radio frequency identification tag 30 according to an embodiment of the present invention. As shown in FIG. 3A, the front printed circuit board of the RFID tag 30 has a curved metal sheet 36, wherein the curved metal sheet 36 has a central angle of about 180 degrees.

Additionally, a battery (not shown) can be placed on the front side of the RFID tag 30 to provide a source of power for the RFID tag 30, as shown in FIG. 3B, the internal circuit (not labeled) can be placed in the The back side of the RFID tag 30 is printed on the circuit board.

4A and 4B are schematic diagrams showing two-dimensional (2D) and three-dimensional (3D) radiation patterns of an antenna according to an embodiment of the present disclosure. In the embodiment shown in FIGS. 4A and 4B, the antenna achieves a standing wave ratio (SWR) of about 2:1.

FIG. 5 is a schematic diagram of a logistics system 50 in accordance with an embodiment of the present disclosure. As shown in FIG. 5, the logistics system 50 includes a container 51 for transporting a plurality of cargo boxes 58, each of which has a radio frequency identification tag 53, each radio frequency identification tag 53. One of the RFID tags 10, 20, 30 is similar to that shown in Figures 1, 2, 3A and 3B.

The container 51, for example, is a 20-inch or 40-inch container having a refrigerating air conditioner 55 for providing a desired temperature during transport of the cargo boxes 58. surroundings. Therefore, the internal environment of the container 51 is a harsh environment for wireless signal transmission between the RFID tag reader 52 and the RFID tag 53.

In addition, the container 51 has at least one RFID tag reader 52 for reading the information of the RFID tag 53 by wireless signal transmission, wherein the information includes the name, weight, size and temperature of the cargo box 58. Or humidity.

One of the information, for example, temperature, is sensed by the RFID tag 53 and transmitted via a separate antenna of the RFID tag 53 and collected by an antenna 54 in or above the container 51. The information is transmitted to the at least one RFID tag reader 52 via wire 56.

Next, the RFID tag reader 52 transmits the information to a server (not shown) in a wired or wireless manner to analyze the information.

For a brief description of the logistics system 50 of the present disclosure, the container 51 is merely an example, and those skilled in the art should understand that the logistics system 50 can also be applied to storage spaces such as warehouses and storage rooms having harsh environments.

The technical content and the technical features of the present disclosure have been disclosed as above, but those skilled in the art should understand that the teachings and disclosures of the present disclosure are disclosed without departing from the spirit and scope of the disclosure as defined by the appended claims. Can be used for various substitutions and modifications. For example, many of the processes disclosed above may be implemented in different ways or in other processes, or a combination of the two.

Moreover, the scope of the present invention is not limited to the particular process, machine, manufacture, composition, means, method or method of the particular embodiments disclosed. It should be understood by those of ordinary skill in the art that, based on the teachings of the present disclosure, the process, the machine, the manufacture, the composition of the material, the device, the method, or the steps, whether present or future developers, The revealer performs substantially the same function in substantially the same manner, and achieves substantially the same result, and can also be used in the present disclosure. Accordingly, the scope of the following claims is intended to cover such <RTIgt; </ RTI> processes, machines, manufactures, compositions, devices, methods or steps.

10‧‧‧RF tags

11‧‧‧First metal path

12‧‧‧Second metal path

15‧‧‧Substrate

16‧‧‧Antenna

16-1‧‧‧ first end

16-2‧‧‧ second end

18‧‧‧ Center

20‧‧‧RF tags

26‧‧‧Antenna

26-1‧‧‧ first end

26-2‧‧‧ second end

30‧‧‧RF tags

36‧‧‧Shaped metal sheets

50‧‧‧Logistics system

51‧‧‧ Containers

52‧‧‧Radio Frequency Identification Tag Reader

53‧‧‧RF tags

54‧‧‧Antenna

55‧‧‧Refrigeration air conditioner

56‧‧‧Wire

58‧‧‧Cargo box

1 is a schematic diagram of a radio frequency identification tag according to an embodiment of the present invention; FIG. 2 is a schematic diagram of a radio frequency identification tag according to another embodiment of the present disclosure; FIG. 3A and FIG. 3B are diagrams of an embodiment of the present invention; FIG. 4A and FIG. 4B are respectively a schematic diagram of a two-dimensional (2D) and three-dimensional (3D) radiation field of an antenna according to an embodiment of the present disclosure; FIG. 5 is a schematic diagram of a logistics system according to an embodiment of the present disclosure.

10‧‧‧RF tags

11‧‧‧First metal path

12‧‧‧Second metal path

15‧‧‧Substrate

16‧‧‧Antenna

16-1‧‧‧ first end

16-2‧‧‧ second end

18‧‧‧ Center

Claims (18)

An antenna for a radio frequency identification (RFID) tag, the antenna comprising: a curved metal piece; a first metal path configured to be electrically coupled to the curved metal piece and an internal circuit of the radio frequency identification tag And a second metal path configured to be electrically coupled to the curved metal piece and the internal circuit of the radio frequency identification tag; wherein the first metal path and the second metal path are separately independent a metal path, and the first metal path and the second metal path are respectively a feed point and a ground point. The antenna of the radio frequency identification tag of claim 1, wherein the curved metal piece has a first end and a second end, and the first end and the second end correspond to the curved metal One of the centroids forms a central angle, wherein the central angle of the central angle ranges from 80 to 200 degrees. The antenna of the radio frequency identification tag of claim 2, wherein the central angle of the central angle ranges from 80 to 120 degrees. The antenna of the radio frequency identification tag according to claim 2, wherein the central angle of the central angle ranges from 150 to 200 degrees. The antenna of the radio frequency identification tag of claim 2, wherein each of the first metal path and the second metal path are coupled to the first end and the second end of the curved metal piece One point between the ends. The antenna of the radio frequency identification tag of claim 2, wherein one of the first metal path and the second metal path is coupled to the first end and the second end of the curved metal piece . A radio frequency identification (RFID) tag comprising: a substrate; an internal circuit on the substrate; and an antenna on the substrate, the antenna comprising: a curved metal piece; a first metal path electrically coupled An internal circuit connected to the curved metal piece and the radio frequency tag; and a second metal path electrically coupled to the curved metal piece and the internal circuit of the radio frequency tag; wherein the first metal path is The second metal path is a separate metal path, and the first metal path and the second metal path are respectively a feed point and a ground point. The radio frequency identification tag of claim 7, wherein the curved metal piece has a first end and a second end, and the first end and the second end are corresponding to the curved metal piece. A center of the circle forms a central angle, wherein the angle of the central angle ranges from 80 to 200 degrees. The radio frequency identification tag of claim 8, wherein the central angle of the central angle ranges from 80 to 120 degrees. The antenna of the radio frequency identification tag of claim 8, wherein the central angle of the central angle ranges from 150 to 200 degrees. The antenna of the radio frequency identification tag of claim 8, wherein each of the first metal path and the second metal path are coupled to the first end and the second end of the curved metal piece One point between the ends. An antenna for a radio frequency identification tag as described in claim 8 of the patent scope, One of the first metal path and the second metal path is coupled to the first end and the second end of the curved metal piece. A logistics system having a plurality of cargo boxes, each of the cargo boxes having a radio frequency identification tag, the logistics system comprising: at least one radio frequency identification tag reader configured to transmit data with the radio frequency identification tag The radio frequency identification tag corresponds to one of the cargo boxes; wherein the radio frequency identification tag comprises an antenna, the antenna further comprises: a curved metal piece; a first metal path configured to be electrically coupled An internal circuit connected to the curved metal piece and the RFID tag; and a second metal path configured to be electrically coupled to the curved metal piece and the internal circuit of the RFID tag; The first metal path and the second metal path are two separate metal paths, and the first metal path and the second metal path are respectively a feeding point and a grounding point. The logistics system of claim 13, wherein the curved metal piece has a first end and a second end, and the first end and the second end are corresponding to a center of the curved metal piece A central angle is formed, wherein the central angle of the central angle ranges from 80 to 200 degrees. The logistics system of claim 14, wherein the central angle of the central angle ranges from 80 to 120 degrees. The logistics system of claim 14, wherein the central angle of the central angle ranges from 150 to 200 degrees. An antenna for a radio frequency identification tag as described in claim 14 Each of the first metal path and the second metal path is coupled to a point between the first end and the second end of the curved metal piece. The antenna of the radio frequency identification tag of claim 14, wherein one of the first metal path and the second metal path is coupled to the first end and the second end of the curved metal piece .