KR20080081494A - System capable of counting the quantity using inductor - Google Patents

Abstract

A system for counting objects with an inductor is provided to check and wirelessly transmit the quantity of objects included in a case by using an inductance value varied according to the property of the object put on a coil of counter board. A counter board(200) has a plurality of holes and a coil is attached on each hole. A counter is included in an RFID(Radio Frequency IDentification) tag(100) and calculates the number of objects inserted into the holes of the counter board by electrically connecting to each coil of the counter board and using a signal received from each coil. The object inserted into the hole is a metallic material and the counter calculates the number of objects inserted into the holes by using an inductance value, which is changed depending on insertion of the object. A signal measured in each coil is transferred to the counter through a connector(320) connected between the counter board and the counter.

Description

Quantification system using inductor {SYSTEM CAPABLE OF COUNTING THE QUANTITY USING INDUCTOR}

1 is a view showing the configuration of a general RFID system,

2 is a view showing a countboard of a quantity grasping system according to a first embodiment of the present invention;

3 is a view showing the configuration of a quantity grasping system according to a first embodiment of the present invention;

4 is a view for explaining the principle of the inductor,

5 is a view illustrating a form in which a count report and the quantity calculator are connected by a connector;

6 is a view showing a state in which an RFID tag is attached to the cartridge in the RFID system according to a second embodiment of the present invention,

FIG. 7 is a view showing a connection state of a count board for identifying the quantity of ammunition in the RFID system according to the second embodiment of the present invention.

8 is a view showing that the countboard and the RFID tag of FIG. 7 are connected by a connector;

9 is a view showing the configuration of an RFID tag in an RFID system according to a second embodiment of the present invention;

10 to 12 are graphs showing signal characteristics in a state where a metal material passes through one hole of the countboard and signals in a state where nothing passes.

In the drawings according to the present invention, the same reference numerals are used for components having substantially the same configuration and function.

* Description of the symbols for the main parts of the drawings *

100: RFID tag 110: chip

120: antenna 200, 200 ': countboard

210: coil 220, 220 ': signal line

310, 320: Connectors 410, 420: Quantity Calculator

The present invention relates to a quantity grasping system, and more particularly, to determine the number of objects present in the countboard by using the fact that the inductance value of the inductor made of the coil depends on the property of the material placed inside the coil. The present invention relates to a quantity detection system, and also to an RFID system for identifying a quantity using an inductance value and receiving it wirelessly.

RFID (Radio Frequency IDentification) system is a non-contact recognition system that attaches a small chip to various items and transmits and processes information of objects and surrounding environment information at radio frequency.

Barcodes, which have been used the most to identify library materials or items at large supermarkets, are cheaper, but they have a very short reading distance and are not reusable. There was a problem that could not be read. On the other hand, RFID (Radio Frequency IDentification) can read / write data wirelessly, eliminating the need for direct contact or scanning on the visible band, simultaneously recognizing multiple data and recognizing data in any direction. In addition, it has a number of semi-permanent advantages in the life of the tag is increasing its utilization.

In recent years, the standardization of RFID, lower prices, and increased reading distances have led to an increasing use in the industry. RFID systems consist of antennas, transceivers (commonly integrated in readers), and tags, also called transponders.

Here, the reader uses radio frequency propagation to transmit a signal for activating the tag. When the tag is activated, the tag transmits data to the reader through the antenna.

1 is a view showing the configuration of a general RFID system.

As shown in FIG. 1, the RFID system includes a reader 10 and an RFID tag 20 having an antenna (not shown). The reader 10 continuously radiates electromagnetic waves of a constant frequency, and the RFID When the tag 20 approaches the frequency operating range of the reader 10, it is wirelessly powered and activated. The RFID tag 20 activated by the supplied power waits for a command from the reader 10 and sends a response back to the reader 10 when a correct command is received.

If the reader 10 sends a command and there is no response from the RFID tag 20 even after a delay defined by the standard, no further communication is performed.

As described above, in the passive RFID system powered by the reader 10, the amount of power supplied is absolutely dependent on the distance between the RFID tag 20 and the reader 10. Therefore, the passive RFID system has a problem in that an error rate of a transmission / reception signal is high, a recognition distance is short, and electromagnetic waves are continuously radiated from the reader 10.

Accordingly, in order to enable high-speed data transmission and have a recognition distance of medium to long distances (several meters to several tens of meters), the use of an active RFID system having its own power supply in a tag is increasing.

However, the conventional RFID system can not be used to identify the quantity of objects contained in a case, for example, to determine the number of bullets in an ammunition container stored in an ammunition warehouse. There is a need for the development of an RFID system that can identify the objects contained in such a case.

The present invention was devised to solve the above problems, and an object of the present invention is to provide a quantity grasping system that can determine the number of objects contained in the case using an inductor.

In addition, another object of the present invention to provide an RFID system that can grasp the number of bullets in the ammunition using the inductance of the coil.

A configuration of the present invention for achieving the above object has a plurality of holes, the count board is attached to each of the holes; And a quantity calculator which is electrically connected to each coil of the countboard and calculates the number of objects inserted into the holes of the countboard using a signal received from each coil. The number of objects inserted into the holes of the countboard is calculated using the value of inductance that varies in each coil depending on whether or not an object is inserted into each of the holes.

In a preferred embodiment, the countboard is formed with signal lines connecting both ends of the coils, the signal lines are electrically connected to the quantity calculator, the quantity calculator is transmitted through the signal lines The signal is used to determine whether an object is inserted into the hole of the countboard.

In a preferred embodiment, the objects plugged into the countboard are metallic objects, and the quantity calculator uses the value of inductance measured differently in the coils according to the properties of the metal passing through the holes of the countboard. Differentiate the metal type of metallic objects inserted into the countboard.

In a preferred embodiment, a connector is electrically connected between the countboard and the quantity calculator so that signals measured at a coil of the countboard are transmitted to the quantity calculator through the connector.

Another configuration of the present invention for achieving the above object is a case; An RFID tag attached to the case; A connector connected to the RFID tag; A reader for transmitting and receiving data with the RFID tag; And a count board connected to the RFID tag through the connector and having a plurality of holes, each having a coil wound around the holes, wherein the RFID tag is counted using data received from the count board. And a quantity calculator for calculating the number of objects inserted into the holes of the board, wherein the RFID tag uses the quantity of inductances measured by the coils to calculate the quantity of the objects inserted into the countboard by the quantity calculator. It is characterized by calculating.

Another configuration of the present invention for achieving the above object is an ammunition container for containing ammunition; An RFID tag attached to the cartridge; A connector connected to the RFID tag; A reader for transmitting and receiving data with the RFID tag; And a count board connected to the RFID tag through the connector and having a plurality of holes through which each of the ammunition in the ammunition passes and coils wound around the holes, respectively. And a quantity calculator for calculating the number of ammunition in the cartridge using data received from the board, wherein the RFID tag uses the quantity of inductance measured in the coils to calculate the quantity of ammunition in the cartridge in the quantity calculator. Calculate

In a preferred embodiment, the count board is formed with signal lines connecting both ends of the coils, the signal lines are electrically connected to the quantity calculator through the connector, the quantity calculator through the signal lines It is determined whether the object is inserted into the hole of the countboard by using the transmitted signal.

In a preferred embodiment, the objects inserted into the countboard are metallic objects, and the quantity calculator uses the value of inductance measured differently in the coils according to the characteristics of the metal passing through the holes of the countboard. Identifies the type of metal of the metallic objects that are plugged into the countboard.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a view showing a countboard of the quantity grasping system according to a first embodiment of the present invention, Figure 3 is a view showing the configuration of a quantity grasping system according to a first embodiment of the present invention.

Referring to the drawings, the quantity grading system according to the first embodiment of the present invention is composed of a count board 200 and the quantity calculating device 410.

The countboard 200 has a plurality of holes and a coil 210 is attached to the holes.

Signal lines 220 are formed on the countboard 200 to connect both ends of the coils 210, and the quantity of signals electrically connected through the signal lines 220 according to the inductance of the respective coils is formed. It can be received by the calculation device 410.

The quantity calculator 410 determines whether an object is inserted into a hole of the countboard 200 using a signal received from the countboard 200 through the signal lines 220.

4 is a view for explaining the principle of the inductor. Referring to FIG. 4, an inductor refers to a coil in which a plurality of windings are wound, and when a current (i) flows through the inductor, the inductor flux is generated through the coil and connected in a ring like a chain. The inductance (L) value varies depending on the amount of flux linkage, and the inductance value of the inductor varies depending on whether or not a metallic material is placed inside the coil and which metal is placed among the metallic materials.

The present invention provides a system that can determine the number of objects placed on the countboard by using the point that the inductance value varies depending on the material placed inside the coil, and further distinguish the types of metal objects.

5 is a view illustrating a form in which the count walkway and the quantity calculator are connected by a connector. Referring to FIG. 5, the signal lines 220 of the count board 200 are connected to the connector 310. The connector 310 is electrically connected to the quantity calculator 410 so that the quantity calculator 410 receives from the countboard 200 through the connector 310 via the signal lines 220. Using the signal to calculate the quantity of the object is inserted into the hole of the countboard 200.

FIG. 6 is a view showing a state in which an RFID tag is attached to an ammunition box in an RFID system according to a second embodiment of the present invention. FIG. 7 is a diagram illustrating a quantity of ammunition in an RFID system according to a second embodiment of the present invention. FIG. 8 is a view illustrating a connection state of a count board, and FIG. 8 is a view illustrating a connection between a count board and an RFID tag of FIG. 7 by a connector, and FIG. 9 is an RFID tag in an RFID system according to a second embodiment of the present invention. Figure showing the configuration of the.

Referring to the drawings, the RFID system according to the second embodiment of the present invention is composed of a reader (not shown) and the RFID tag 100, the RFID tag 100 is attached to the ammunition container to count the number of bullets The countboard 200 is connected via the connector 300.

The RFID tag 100 includes a chip 110 and an antenna 120, and the chip 110 includes a controller, a memory, and a quantity calculator.

The quantity calculator is for calculating the number of bullets stored in the cartridge case to which the RFID tag 100 is attached.

 The memory stores information on an article to which a tag is attached, information on tag user authentication, and the like, and the controller controls the memory such as reading data stored in the memory or writing new data into the memory. Instead, signal processing and logic operations are performed for data communication with the reader.

The countboard 200 has a plurality of holes through which each bullet in the ammunition passes and coils are attached on the holes.

10 to 12 are graphs showing signal characteristics in a state in which a metal material passes through one hole of the countboard and a signal characteristic in a state in which nothing is passed. FIG. Fig. 11 is a graph showing signal characteristics received at both ends of the coil attached to the hole in the absence of any state, and Fig. 11 shows the coil attached to the hole in the state where a copper metal bar is passed through one hole of the countboard. 12 is a graph showing signal characteristics received at both ends, and FIG. 12 is a graph showing signal characteristics received at both ends of a coil attached to the hole in a state where an iron bar passes through one hole of the countboard.

The passage of the copper metal rod through the hole of the countboard may be regarded as a state in which a bullet is inserted into the hole of the countboard in the case of an ammunition barrel.

Referring to the drawings, the signal characteristics in the state where the copper metal rod passes through the holes of the countboard are clearly different from the signal characteristics when nothing is in the holes. That is, if there is nothing in the hole of the countboard, the signal SOUT1 received from the coil attached to the hole is slightly larger than the input signal SIN, but if the countboard has a copper metal rod, it is received from the coil. It can be seen from FIGS. 10 and 11 that the signal SOUT2 is a signal much larger than the input signal SIN.

Referring to FIG. 12, it is confirmed that the signal SOUT3 received from the coil is much smaller than the signal SOUT1 when there is nothing in the state where the iron rod other than the copper metal rod passes through the hole of the countboard. Can be. In particular, in the case of the iron rod, a smaller signal is detected than when there is nothing on the countboard. As described above, since the characteristics of the signal received from the coil of the hole are different depending on the property of the metal inserted into each hole of the countboard, the present invention utilizes such characteristics, as well as the number of objects to be plugged into the countboard. Even the distinction is possible.

FIG. 13 is a view showing the configuration of a count board of a quantity grading system according to a third embodiment of the present invention.

Referring to FIG. 13, in the water quantity grasping system according to the third exemplary embodiment of the present invention, each bullet in the cartridge has a plurality of holes through which each bullet passes, and each of the holes has a pair of contacts formed therein. The contacts include a count board 200 'to which signal lines are connected.

The pair of contacts N1 and N2 formed in the upper left hole of FIG. 13 are electrically connected to each other by the ammunition when the ammunition passes through the hole, and the contacts in each hole are electrically connected by the ammunition. The number of ammunition plugged into the countboard may be determined by determining whether the RFID tag is connected through the signal lines 220 '.

In the above, the configuration and operation of the present invention has been shown in accordance with the above description and drawings, but this is merely described, for example, and various changes and modifications are possible without departing from the spirit and scope of the present invention. .

As described above, according to the present invention, the inductance value of the coil attached to the countboard is different depending on whether or not there is a metal body in the center of the coil. . In particular, there is an advantage in that it is possible to provide an RFID system that can grasp the number of bullets in the cartridge case by using the inductance of the coil.

In addition, according to the present invention, the inductance value of the coil is changed according to the type of metal passing through the coil, and thus there is an advantage in that it is possible to distinguish not only the amount of the individual inside the case but also any metal.

Claims (9)

A count board having a plurality of holes, each of which has a coil attached thereto; And And a quantity calculator which is electrically connected to each coil of the countboard and calculates the number of objects inserted into the holes of the countboard using a signal received from each coil. The quantity calculator calculates the number of objects inserted into the holes of the countboard by using the value of inductance that varies in each coil depending on whether or not an object is inserted into each of the holes. Quantity grasp system. The method of claim 1, The count board is formed with signal lines connecting both ends of each coil, The signal lines are electrically connected to the quantity calculator, and the quantity calculator determines whether an object is inserted into a hole of the countboard using a signal transmitted through the signal lines. Quantification system using The method of claim 2, The objects plugged into the countboard are metallic objects, The quantity calculator distinguishes metal types of metallic objects inserted into the countboard by using inductance values measured differently in the coils according to characteristics of the metal passing through the holes of the countboard. Quantification system using inductor. The method according to any one of claims 1 to 3, A connector is electrically connected between the countboard and the quantity calculator so that signals measured by the coil of the countboard are transmitted to the quantity calculator through the connector. case; An RFID tag attached to the case; A connector connected to the RFID tag; A reader for transmitting and receiving data with the RFID tag; And And a count board connected to the RFID tag through the connector and having a plurality of holes, each having a coil wound around the holes. The RFID tag includes a quantity calculator that calculates the number of objects inserted into the holes of the countboard by using the data received from the countboard. The RFID tag is a quantity grading system using the inductor, characterized in that for calculating the quantity of the objects inserted into the countboard by the quantity calculator using the value of the inductance measured in the coils. An ammunition to hold ammunition; An RFID tag attached to the cartridge; A connector connected to the RFID tag; A reader for transmitting and receiving data with the RFID tag; And And a count board connected to the RFID tag through the connector and having a plurality of holes through which each of the ammunition in the ammunition passes and coils wound around the holes. The RFID tag includes a quantity calculator for calculating the number of ammunition in the cartridge using the data received from the countboard, The RFID tag is a quantity grading system using an inductor, characterized in that for calculating the quantity of ammunition in the cartridge in the quantity calculator using the value of the inductance measured in the coils. The method according to claim 5 or 6, The count board is formed with signal lines connecting both ends of each coil, The signal lines are electrically connected to a quantity calculator through the connector, and the quantity calculator determines whether an object is inserted into a hole of the countboard using a signal transmitted through the signal lines. Quantification system using inductors. The method of claim 7, wherein The objects plugged into the countboard are metallic objects, The quantity calculator is configured to distinguish metal types of metallic objects inserted into the countboard by using inductance values measured differently in the coils according to the characteristics of the metal passing through the holes of the countboard. Quantification system using An ammunition to hold ammunition; An RFID tag attached to the cartridge; A connector connected to the RFID tag; A reader for transmitting and receiving data with the RFID tag; And The RFID tag is connected to the RFID tag through the connector, each of the ammunition in the cartridge has a plurality of holes therethrough, and a pair of metallic contacts are formed around the holes, and signal lines connecting the contacts. It includes a countboard; The RFID tag includes a quantity calculator for calculating the number of ammunition in the cartridge using the data received from the countboard, And the RFID tag recognizes whether the pair of contacts are electrically connected by ammunition and calculates the quantity of ammunition in the ammunition by the quantity calculator.

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