KR100967787B1 - Apparatus for Radio Frequency Identification - Google Patents

Abstract

The present invention relates to a wireless identification device and method for recognizing a tag attached to a recognition object such as a container, wherein the wireless identification device according to the present invention is attached to the recognition object, A tag storing identification information; First and second reader antennas which receive data transmitted from the tag and transmit the received data to a reader connected to each reader antenna; A first reader for transmitting a signal for waking the tag attached to the recognition object so that a reception distance can also reach a tag that does not pass through the gate; A second reader for transmitting a signal for reading identification information of the tagged object to be recognized; It characterized in that it comprises a server for controlling the operation of the first and second readers.

RFID, wireless identification, wireless identification, tags, readers

Description

Radio identification device {Apparatus for Radio Frequency Identification}

The present invention relates to a wireless identification device and method for recognizing a tag attached to an object to be recognized, such as a container. The present invention relates to a method of waking a tag before a object such as a container passes through a gate. The present invention relates to a wireless identification device and method capable of quickly recognizing a tag by pre-wake up.

In general, RF (Radio Frequency IDentification) technology refers to a technology for contactlessly reading data stored in a tag, a label, a card, etc., in which a small semiconductor chip is embedded, using a radio frequency signal. .

Such radio identification technology uses radio frequency signals to recognize the information of the article and its surroundings from the tags attached to the article, thereby collecting, storing, processing, and tracking the information of each article, thereby positioning, It provides various services such as remote processing, management and information exchange between goods.

In general, a container vehicle passes through a customs clearance process while entering and exiting at a gate, which is an entrance and exit of a cargo terminal. The identification information of each container is determined through various recognition methods such as a barcode device, a camera recognition device, and a wireless identification device. Managed.

The barcode device is a device that provides stop position information by contacting a barcode card possessed by a driver to a barcode reader. The barcode system method not only requires the driver to always carry a barcode card, but also the system's response is not immediate. There is this.

In addition, the camera recognition device is a device for inputting the vehicle number and the container number through a camera installed around the gate, the camera recognition system also has a disadvantage that the recognition rate is very different depending on the cleanliness and attachment position of the license plate of the vehicle and container. .

On the other hand, the wireless identification device solves the above problems and can exchange information without contacting the reader through radio wave transmission using a small semiconductor chip, and thus, wireless identification technology has recently been expanded to nationwide ports.

1 is a block diagram of a device for recognizing a tag attached to a conventional container (container).

Referring to FIG. 1, a device 100 for recognizing a tag attached to a conventional container may include a tag 101 attached to a container and storing recognition information, and the question of the reader 103 in the tag 101. A reader antenna 102 for receiving and transmitting a signal to be transmitted to the reader 103, and a reader 103 for modulating a question signal for transmission to the tag 101 and recognizing and processing a signal carried by the tag. And a server 104 that controls the reader 103.

The tag 101 stores identification information on a container that is a recognition object passing through a gate and is attached to the recognition object. In addition, the reader antenna 102 emits radio frequency, transmits a modulated question from the reader 103, receives a signal returned from the tag 101 for the transmitted question, and transmits the signal to the reader 103. do. In addition, the reader 103 controls the frequency transmission and decrypts the information received from the tag 101. In addition, the server 104 wakes up one or more tags 101 attached to a container present on a gate, reads and processes information from the tags 101, and distributes the readers 103 that are distributed. Manage.

However, when the container entry and exit procedure using the conventional wireless identification device as described above also wakes up the tag while passing through the gate, the container truck has to stay at the gate for at least 2.5 seconds to recognize the identification information stored in the tag, thereby delaying the transportation time. The problem is pointed out.

Therefore, in order to solve the above problem, the present invention aims to minimize the time the container stays at the gate by waking the tag in advance before passing through the gate.

An object of the present invention for solving the above problems, in the device for recognizing the tag attached to the recognition device, such as a container is added to the container in the gate by adding a pre-wake operation of the tag before the container passes through the gate. An apparatus and a method for quickly recognizing a tag are provided.

A wireless identification device according to an embodiment of the present invention for realizing the above object is attached to a recognition object, a reader storing identification information of the recognition object and a reader connected to each reader antenna by receiving data transmitted from the tag. The first and second reader antennas to transmit to the tag attached to the recognition target and the first reader to transmit a signal that wakes the tag so that the reception distance does not pass through the gate; And a server for controlling the operation of the second reader and the first and second readers for transmitting a signal for reading the identification information.

Accordingly, the role of the reader is classified, and the first reader and the second reader are respectively installed, and the first reader serves to wake up the tag in advance according to a command signal from the server, and the second reader reads the information stored in the tag. Since the first reader transmits a wake-up signal to a tag that does not pass through the gate so that the tag wakes up before the recognition object passes through the gate, the identification of the tag is not required on the gate. Since information can be recognized, the speed of recognizing a tag can be improved.

In addition, the first reader antenna and the first reader is preferably installed in the position before passing through the gate.

Accordingly, the first reader antenna and the first reader are installed at a position before passing through the gate to transmit a wake up signal to wake up the tag, so that the receiving distance of the wake up signal is not far from the tag before passing through the gate. There is an advantage that the tag can be woken up before it passes through the gate without requiring relatively large.

In addition, it is preferable that the second reader includes a plurality of readers.

Accordingly, the reader sets the reader to read the tag even when a plurality of tagged objects to be tagged are passed by using the second reader group composed of the plurality of readers. When the plurality of readers process the information stored in the plurality of tags, respectively, there is an advantage in that the plurality of tags can be processed quickly in the logistic passing process.

In addition, it is preferable that the tag, the first and second reader antennas, and the first and second readers use microwaves of 433 MHz.

Accordingly, the 433MHz band wireless identification technology is a frequency technology defined to allow for convenient customs clearance in international transportation of large logistics such as containers, and the tag, the first and second reader antennas, and the first and second readers use 433 MHz microwaves. Since communication is possible within about 100m, there is an advantage that it can be conveniently used for the transport and storage of large logistics such as ports and docks.

In addition, the server transmits a wake command signal for waking the tag in advance to the first reader at intervals of 20 seconds or more and 30 seconds or less, and after the wake command signal is transmitted, stored in a tag attached to the recognition target. Preferably, a read command signal for reading information is transmitted to the second reader.

Accordingly, the server periodically sends a wake-up command signal to the first reader, and the object to be recognized passes through the gate with the tag awake. Since the tag that has been woken up by the first reader keeps awake for about 25 seconds and falls asleep again, the first reader periodically sends a wake command signal to wake up the tag at intervals of 20 seconds or more and 30 seconds or less. The tag may be set so that the recognition object wakes up the tag again before passing through the gate even when the tag is wakened up. In addition, when the recognition object passes through the gate, the read command signal is transmitted to the second reader to read the information stored in the tag so that the identification information stored in the tag can be recognized without the need to wake up a separate tag on the gate. The speed of recognizing the tag is improved.

In addition, the server transmits a wake command signal for waking the tag in advance to the first reader at intervals of 20 seconds or more and 30 seconds or less, and after the wake command signal is transmitted, stored in a tag attached to the recognition target. A read command signal for reading the information is transmitted to a second reader, and when the information stored in the tag is input to the server, the second reader transmits the information stored in the tag to the server. Is preferably sent to a second reader.

Accordingly, the server sends a wake-up command signal for resuming the waked up tag to the second reader to resuspend the tag that has transmitted the identification information, thereby reducing power consumption compared to the case where the tag continues to wake up. There is an advantage to this. Further, by reading the identification information, the tag can be quickly silenced to prevent the second reader from unnecessarily reading the identification information once again by keeping the tag awake. There is this.

In addition, the wireless identification method according to an embodiment of the present invention for realizing the above problem, after the server transmits a wake command signal for waking the tag attached to the recognition target in advance to the first reader, and after transmitting the wake command signal The first step of transmitting a read command signal for reading the information stored in the tag to a second reader, the first reader receiving the wake command signal to receive the signal to wake up the tag even if the tag does not pass through the gate And a third step of transmitting to the tag a signal for reading the information stored in the tag by the second reader receiving the read command signal.

Accordingly, the server controls the operation of the first and second readers so that the first reader wakes up the tag attached to the recognition target that does not pass through the gate, thereby eliminating the need to wake up a separate tag on the gate. The information can be recognized, so that the speed of recognizing the tag is improved.

The wireless identification method may further include, when the second reader reads the information stored in the tag and transmits the information to the server, the server transmits a wake-up command signal to the second reader to a second reader. And sending, by the second reader, the signal for receiving the sleep command signal, to the tag.

Accordingly, by controlling the second reader so that the server can resuspend the waked up tag, power consumption can be reduced as compared to the case where the tag continues to be woken up, and the tag whose identification information has been read once is read again. There is an advantage that can be prevented.

In addition, the first reader antenna and the first reader is preferably installed in the position before passing through the gate.

Accordingly, the first reader antenna and the first reader are installed at a position before passing through the gate to transmit a wake up signal to wake up the tag, thereby receiving the wake up command signal because the distance from the tag that has not passed through the gate is not far. The advantage is that the tag can be woken up before it passes through the gate without requiring a relatively large distance.

In addition, it is preferable that the second reader includes a plurality of readers.

Accordingly, there is an advantage in that the second reader including the plurality of readers processes the tags attached to the plurality of identification objects passing through the gate, thereby improving the speed of recognizing the tags.

In addition, it is preferable that the tag, the first and second readers and the first and second reader antennas use microwaves of 433 MHz.

Accordingly, the 433MHz band wireless identification technology is a frequency technology defined to allow for convenient customs clearance in international transportation of large logistics such as containers, and the tag, the first and second reader antennas, and the first and second readers use 433 MHz microwaves. Since communication is possible within about 100m, there is an advantage that it can be conveniently used for the transport and storage of large logistics such as ports and docks.

According to the tag recognition apparatus and tag recognition method using the same according to the present invention configured as described above, compared with the case of waking up a tag attached to a recognition object such as a container on a gate and receiving identification information stored in the tag, By waking the tag in advance before passing through, the tag can be recognized even if the recognition target does not stay over 2.5 seconds on the gate, thereby improving the speed of recognizing the tag.

DETAILED DESCRIPTION Hereinafter, a detailed description of a preferred embodiment of the present invention will be described with reference to the accompanying drawings. It should be noted that the same reference numerals and the same elements among the drawings are denoted by the same reference numerals and symbols as much as possible even though they are shown in different drawings. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

2 is a block diagram of a wireless identification device according to an embodiment of the present invention.

Referring to FIG. 2, the apparatus 200 for wireless identification according to an embodiment of the present invention may include a tag 201, a first and second reader antenna 202, a first reader 203, a second reader 204, and a server. 205.

The tag 201 refers to a device that can transmit and receive various data in a wireless manner by using a predetermined frequency band, and stores identification information about a recognition object passing through a reader, and is attached to the recognition object and passes through a gate. Done.

In addition, the first reader antenna 202 is attached to the first reader 203, the second reader antenna 202 is attached to the second reader 204 to emit a radio frequency. The first and second reader antennas 202 receive data transmitted from the tag 201 and transmit the received data to the first and second readers 203 and 204.

In addition, the first reader 203 receives a wake up command signal from the server 205 and periodically sends a wake up signal to the tag 201. The reception distance of the wake-up signal may reach a tag that does not pass through the gate so that the tag 201 wakes up even before the object to which the tag 201 is attached passes through the gate. The first reader 203 is installed in the front in the direction in which the identification object to which the tag 201 is attached enters.

In addition, the second reader 204 receives a read command signal from the server 205, reads identification information stored in the tag 201, transmits the identification information to the server, and sends a reload command signal from the server 205. Takes the function of re-wakeing the tag 201 waking up. The second reader 204 is installed at the rear in the direction in which the identification object to which the tag 201 is attached enters, and after the first reader 203 first wakes up the tag 201 attached to the identification object, A read command signal is sent to read the information stored in tag 201.

In addition, the server 205 performs a function of controlling the operations of the first and second readers, and processes information read from one or a plurality of tags 201.

Specifically, the server 205 transmits a wake-up command signal for waking the tag 201 to the first reader 203 at intervals of 20 seconds or more and 30 seconds or less, so that the first reader 203 receives the tag. The tag 201 is controlled to wake up. After transmitting the wake command signal, the server 205 transmits a read command signal to read the information stored in the tag 201 attached to the recognition object to the second reader 204, and the second The reader 204 controls to read the identification information stored in the tag 201. The second reader 204 reads the identification information stored in the tag 201 and transmits the identification information to the server 205, and when the identification information is input to the server 205, the server 205 reads the waking tag. A sleep command signal for shutting down 201 is transmitted to the second reader 204 to control the second reader 204 to suspend the waking tag 201 again.

The tag wakes up once receiving the tag wake-up signal from the first reader, and stays awake for about 25 seconds before falling asleep again. When congestion or the like occurs during transportation of the object through the gate, even if the first reader wakes up the tag in advance, the object becomes asleep when the object passes through the gate. The tag may control the first reader to continuously transmit the wake-up signal at intervals of about 20 seconds to 30 seconds so that the tag may be kept awake when the object to be recognized passes the gate.

3 is a configuration diagram of a wireless identification device having different positions where a first reader antenna and a first reader are installed according to another embodiment of the present invention.

Referring to FIG. 3, an apparatus 300 for recognizing a tag according to another exemplary embodiment may include a tag 301, a first and second reader antennas 302, a first reader 303, and a second reader 304. ) And server 305.

The first reader antenna 303 and the first reader 304 according to another embodiment are installed at a position before passing through the gate.

The first reader antenna 303 is installed at a position before passing through the gate, and receives the data transmitted from the tag 301 and transmits the data to the first reader 303 connected to the first reader antenna 303. .

The first reader 303 is installed at a position before passing through the gate, thereby reducing the distance to the tag 301 not passing through the gate. The first reader 303 receives a wake command signal for waking the tag from the server 305 and periodically wakes up the tag 301 before the recognition object passes through the gate.

RFID technology recognizes the identification information stored in the tag through the reader using the frequency. Currently, the International Standardization Organization's radio frequency identification technology includes 13.56MHz and 433MHz bands, which are weak radio waves. The 433 MHz band is used for container management. Since the microwave at 433 MHz can be recognized up to a distance of about 50 m or more and 100 m or less, the tag 201, the first and second reader antennas 202, and the first reader 203 used in the wireless identification device 200. When the second reader 204 uses the microwave at 433 MHz, the identification information of the object to be recognized may be exchanged even when transporting and storing large logistics such as a port and a pier.

Hereinafter, a wireless identification method according to the present invention will be described.

The server controlling the first and second readers transmits a wake command signal to wake up the tag in which the identification information is stored periodically at intervals of about 20 seconds to 30 seconds to the first reader, and after transmitting the wake command, the second reader The read command signal for reading the identification information stored in the tag is transmitted to the. The first reader receiving the wake command signal sends the tag wake-up signal to the tag so that a reception distance can reach a tag that does not pass through the gate, so that the recognition target can pass the tag before passing through the gate. Wake up. The second reader receiving the read command signal reads identification information of a tag attached to the recognition object and transmits the identification information to the server. When the identification information of the tag is input to the server, the server transmits a wake-up command signal to the second reader so that the tag, which is awake, can be woken up again. The reader receiving the sleep command signal sends a sleep signal to the tag in the awake state to sleep the tag again.

4 is a diagram illustrating a wireless identification process using a method of waking a tag in advance according to an exemplary embodiment of the present invention.

Referring to FIG. 4, the server transmits a wake command signal to wake the tag to the first reader (S310). The first reader receiving the wake command signal may reach the tag even before the gate passes the gate through the receiving distance of the wake up signal, and wakes up the tag before the recognition object passes through the gate (S320). If the recognition object does not pass through the gate while the tag wakes up due to congestion or the like during the transport of the object to be recognized, such as a container, the tag sleeps again after about 25 seconds. In response to the wake command signal, the first reader wakes up the tag again (S330). After transmitting the wake command signal, the server transmits a read command signal for reading identification information of the tag to the second reader (S340). When the tag enters within the recognition distance of the second reader receiving the read command signal, the identification information stored in the tag is read, and the identification information is transmitted to the server (S350). The server continuously transmits a read command signal to the second reader until identification information of the tag is input (S360). The reader reads the identification information of the tag and transmits the identification information to the server, and when the identification information of the tag is input to the server, the server transmits a sleep command signal to the second reader so that the tag can be silenced (S370). The second reader receiving the sleep command signal suspends the tag that is awake (S380). Thereafter, the process is repeated if there are more objects to be recognized, such as a container that has not passed through the gate, and the radio recognition process is terminated when all objects to be recognized have passed through the gate. (S380).

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the appended claims as well as the equivalent scope of the claims.

1 is a block diagram of a device for recognizing a tag attached to a conventional container (container).

2 is a block diagram of a wireless identification device according to an embodiment of the present invention.

3 is a block diagram of a wireless identification device according to another embodiment of the present invention.

4 is a diagram illustrating a wireless identification process according to an embodiment of the present invention.

Claims (11)

A tag attached to a recognition object and storing identification information of the recognition object; First and second reader antennas which receive data transmitted from the tag and transmit the received data to a reader connected to each reader antenna; A first reader for transmitting a signal for waking the tag attached to the recognition object so that a reception distance can also reach a tag that does not pass through the gate; A second reader for transmitting a signal for reading identification information of the tagged object to be recognized; A server for controlling the operation of the first and second readers, The server periodically sends a wakeup command signal to wake up the tag in advance to the first reader, and after sending the wakeup command signal to a second read command signal for reading information stored in a tag attached to the recognition target. And transmitting to the second reader a wake-up command signal to shut down the tag when the information stored in the tag is input. The method of claim 1, And the first reader antenna and the first reader are installed at a position before passing through the gate. The method of claim 1, The second reader A wireless identification device comprising a plurality of readers. The method of claim 1, The tag, the first and second reader antenna, the first and second reader A wireless identification device using microwaves of 433 MHz. delete delete delete delete delete delete delete

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