JP3924962B2 - ID tag for dishes - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dish-shaped article ID tag that is provided on a dish-shaped article and communicates with a reader / writer by radio waves.
[0002]
[Problems to be solved by the invention]
For example, there is a remote ID system using high-frequency radio waves as a mobile object identification system. In this method, communication using a radio signal (magnetic signal) is performed between the controller and the ID tag, and data of the ID tag at a remote position is read or data is written to the ID tag.
[0003]
Such a remote ID system is considered to be applied to various systems such as a delivery system, an inventory management system, and a sales system. As an example, there is, for example, a counting system of a rotating sushi store. Introduction of this system is, in embedded ID tags to the dish to put the sushi, the kind of sushi, made the time, place to record data such as the selling price, when the customer has finished a meal, a dish eaten sushi one It collects at a place, communicates with the ID tag of those dishes, and obtains data from the ID tag to calculate the amount of money to be paid by the customer.
[0004]
When applied to such a totaling system, as shown in FIG. 17, an ID tag D is provided on a sushi plate A and an antenna for transmitting and receiving radio signals (magnetic signals) with an external reader / writer. The coil C is provided, and the eaten sushi plate A is placed on, for example, the antenna on the fixed reader / writer side, or the handheld reader / writer is held on the sushi plate A for communication. . However, since the radio wave intensity (magnetic field strength) for transmission and reception is not so strong, depending on the number of stacked sushi dishes A, if a large number of sheets are stacked, the upper dish far from the reader / writer, or This causes a problem that it becomes impossible to communicate with the lower plate.
[0005]
In that case, it seems that it is sufficient to hold the reader / writer main body in the middle of a large number of stacked plates, but the transmitting / receiving antenna of the reader / writer is composed of one coil. As shown in FIG. 18, the magnetic flux M radiated from the transmitting antenna S tends to go straight in the central portion of the transmitting antenna S. As a result, the magnetic flux interlinking with the antenna coil C on the sushi pan A side is insufficient and the reader It becomes impossible to communicate with the sushi plate A immediately adjacent to the writer body.
[0006]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a dish-shaped article ID tag that can communicate with a reader / writer even if the reader / writer antenna is placed next to the dish-shaped article. In offer.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the invention of claim 1
In the dish-shaped article ID tag including an antenna coil for transmitting and receiving radio signals to and from a reader / writer,
For a dish-shaped article having a yarn bottom at the bottom and an inclined surface portion extending upward from the yarn bottom, the antenna coil is disposed on both sides of the antenna coil opposite to each other on the yarn bottom or the inclined surface portion. Is provided so as to be separated in the vertical direction.
[0008]
According to this configuration, since the opposite side portions of the antenna coil are separated in the vertical direction, out of the magnetic flux radiated from the reader / writer antenna placed beside the dish-shaped article, the antenna of the dish-shaped article The number of magnetic fluxes linked to the coil for use increases, and communication between the ID tag and the reader / writer can be performed satisfactorily.
[0009]
The invention of claim 2
The antenna coil includes a second coil provided in a substantially horizontal state, in addition to a first coil provided so that opposite sides of the coil are vertically separated from the dish-shaped article. It is characterized by comprising.
[0010]
According to this configuration, when the reader / writer is placed on the dish-shaped article, the magnetic flux radiated from the antenna is linked to the second antenna, so even if the reader / writer is on the dish-shaped article, Communication with the ID tag becomes possible.
[0011]
The invention of claim 3
In the dish-shaped article ID tag including an antenna coil for transmitting and receiving radio signals to and from a reader / writer,
For the dish-shaped article having a yarn bottom at the bottom and an inclined surface portion extending upward from the yarn bottom, the antenna coil is composed of a continuous coil having a plurality of small coils in series, and the continuous coil is It is characterized in that the opposite side portions of the small coil are provided on the yarn bottom or the inclined surface portion of the dish-shaped article so as to be separated in the vertical direction.
[0012]
According to this configuration, when the reader / writer is placed beside the dish-shaped article, the magnetic flux radiated from the antenna is interlinked with a small coil, and when the reader / writer is placed on the dish-shaped article, Since the magnetic flux radiated from the antenna is linked to the connecting wire connecting the small coils, communication is possible even when the reader / writer is placed on the side of the dish-like article or on the dish-like article.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
The first embodiment of the present invention will be described below with reference to FIGS. This embodiment is applied to a total system of a rotating sushi store. Here, the rotating sushi store is a store having the following system.
A loop-shaped conveyor is provided in the store, and customer seats are provided along the conveyor. The sushi is placed on a plate and carried to the audience seat by a conveyor. A customer takes a plate on which a favorite sushi is placed from among the plates carried by the conveyor, and the plates after eating are sequentially stacked on the table. On the store side, the sushi is placed on a plate of a color or pattern corresponding to the selling price, so that the customer can know the approximate amount to be paid to the store from the stacked plates and the number of plates. After finishing the meal, the store clerk counts the number of dishes by color or pattern and determines the amount to be paid to the store.
[0014]
FIG. 6 shows the main body 1 of the handheld reader / writer. The hand-held reader / writer main body 1 includes an operation unit 2 that also serves as a hand-held unit, and a head 3 provided on one end side of the operation unit 2. The head 3 includes a display unit made of, for example, liquid crystal. 4 is provided. The operation unit 2 is provided with, for example, a plurality of key switches 5. By these key switches 5, the operation content is instructed, and basic data necessary for tabulation, for example, unit price for each type of sushi plate is input. It is like that.
[0015]
The handheld reader / writer main body 1 includes a main control unit 6 and a remote control unit 7 as shown in FIG. The main control unit 6 is connected to the group of key switches 5 via a switch circuit 8, and a communication unit 9 that exchanges data between the display unit 4 and a host device (for example, a personal computer). Etc. are connected. The remote control unit 7 is connected to an antenna unit 10 that transmits and receives radio wave signals (magnetic signals) and a sound generation unit 11 such as a buzzer. The switch circuit 8 transmits a signal corresponding to the operated key switch to the main control unit 6.
[0016]
As shown in FIGS. 8 and 9, the control units 7 and 8 are respectively provided from MPUs 12 and 13, ROMs 14 and 15 that store operation programs, RAMs 16 and 17 that temporarily store data, communication units 18 and 19, and the like. The main control unit 6 and the remote control unit 7 are configured to exchange data through the respective communication units 18 and 19. The remote control unit 7 includes a transmission unit 20 and a reception unit 21, and the transmission unit 20 and the reception unit 21 are connected to the transmission antenna 22 and the reception antenna 23 of the antenna unit 10. The transmission antenna 22 and the reception antenna 23 are formed of, for example, a rectangular coil, and are concentrically disposed on the head 3 of the handheld reader / writer main body 1 as shown in FIG.
[0017]
The MPU 12 of the main control unit 6 processes data and controls peripheral devices. The MPU 12 executes processing according to a signal sent from the remote control unit 7 or the switch circuit 8 and is executing the processing. The processing content or the processing result is displayed on the display 4.
[0018]
On the other hand, the MPU 13 of the remote control unit 7 controls communication and also controls the sound generation unit 11. When performing communication, the carrier signal is first modulated by the transmission unit 20 to be a power radio signal. Then, the data to be transmitted is modulated by the transmission unit 20 so as to be superimposed on the power radio signal and transmitted from the transmission antenna 22.
[0019]
The radio signal radiated from the other party is received by the receiving antenna 23, demodulated by the receiving unit 21, and discriminated as data. Then, the MPU 13 of the remote control unit 7 temporarily stores the data demodulated by the receiving unit 21 in the RAM 17 and then transmits the data to the main control unit 6 side via the communication unit 19. Yes. The hand-held reader / writer body 1 having the above-described electrical configuration includes a battery 24 (see FIG. 5) as an operating power source.
[0020]
On the other hand, as shown in FIG. 1, a dish 25 (dish-like article) on which a sushi is placed is made of plastic such as melanin resin, and an ID tag 26 is embedded therein. As shown in FIG. 4, the ID tag 26 includes an antenna coil 27 for transmitting and receiving radio wave signals (magnetic signals), a resonance capacitor 28, a control IC 29, and a smoothing unit 30, and includes a resonance capacitor. 28, the control IC 29 and the smoothing unit 30 are mounted on the printed wiring board 31.
[0021]
The control IC 29 is a chip in which semiconductor elements constituting the rectifying unit 33, the modem unit 34, the memory unit 35, etc., in addition to the MPU (microprocessor unit) 32 as a control unit, are formed. The smoothing unit 30 includes a smoothing capacitor, a Zener diode, and the like, although not shown.
[0022]
The antenna coil 27 is connected in parallel with the resonance capacitor 28 to form a resonance circuit, and when a radio wave signal for power having a predetermined high frequency is transmitted from a reader / writer as an external device, the antenna coil 27 receives the signal. And transmitted to the rectifying unit 33. The rectification unit 33 constitutes an operation power supply circuit together with the smoothing unit 30, rectifies the electric power radio signal transmitted from the resonance circuit, smoothes it by the smoothing unit 30, and outputs a constant voltage DC power (operational power). ) And supplied to the MPU 32 or the like.
[0023]
The data signal superimposed on the power radio signal transmitted from the reader / writer is demodulated by the modem unit 34 and applied to the MPU 32. The MPU 32 operates in accordance with an operation program stored in the ROM of the memory unit 35, executes a process according to the signal input from the modem unit 34, and erases the received data from the EEPROM of the memory unit 35. The data is written in a possible non-volatile memory, or the data is read from the memory unit 35, modulated by the modem unit 34, and transmitted as a radio wave signal (magnetic signal) from the antenna coil 27.
[0024]
Incidentally, as shown in FIG. 2, the antenna coil 27 of the ID tag 26 is formed flat so that the opposite side portions 27a and 27b are close to each other, and is bent in a substantially cylindrical shape as a whole. . As shown in FIG. 1, the antenna coil 27 is disposed on the yarn bottom 25a of the dish 25 so that the opposing side portions 27a and 27b are separated in the vertical direction.
[0025]
In the above configuration, when totaling the payment amount of customers who have eaten, as shown in FIG. 5, hold the operation unit 2 of the main body 1 of the handheld reader / writer and hold the reading switch ( Select and operate the aggregation switch. Then, the MPU 12 of the main control unit 6 transmits a totaling command to the remote control unit 18, and by this totaling command, the MPU 13 of the remote control unit 7 modulates the carrier signal by the transmission unit 20 and transmits it as a power radio signal to the transmission antenna 22. The data to be transmitted is modulated by the transmission unit 20 so as to be superimposed on the power radio signal and transmitted from the transmission antenna 22.
[0026]
In this state, the hand-held reader / writer main body 1 is held beside the trays 25 stacked on the table so that the head 3 faces sideways, and the top plate 25 to the bottom plate. Move down to 25. Then, on the ID tag 26 side of the dish 25, the transmitted radio wave signal is received by the antenna coil 27, and the radio wave signal is rectified and smoothed by the rectifying unit 33 and the smoothing unit 30 to be converted into DC power having a constant power. Supply power for operation.
[0027]
By supplying power for operation, the MPU 32 of the ID tag 26 of each plate 25 starts operation, and in accordance with the content of the transmitted signal, in this case, the ID number of the plate 25 from the memory unit 35, the plate Data such as 25 types are read out, modulated by the modem unit 34, and transmitted from the antenna coil 27. The radio wave signal transmitted from the ID tag 26 of each dish 25 is received by the receiving antenna 23 of the handheld reader / writer body 1, the received signal is demodulated by the receiving unit 21, and the demodulated data is stored in the RAM 26. .
[0028]
Here, a radio wave signal transmitted from the transmission antenna 22 of the handheld reader / writer body 1, that is, a magnetic flux as a magnetic signal, is radiated straight at the central portion of the coil constituting the transmission antenna 22. In this case, since the antenna coil 27 on the tray 25 side is disposed around the yarn bottom 25a and the opposite side portions 27a and 27b are positioned above and below, as shown in FIG. Of the magnetic flux M radiated from the transmitting antenna 22, the magnetic flux interlinking with the antenna coil 27 on the dish 25 side increases. For this reason, there is no fear that the ID tag 2 of the plate 25 immediately adjacent to the handheld reader / writer main body 12 will be in a state of insufficient power, and communication with the handheld reader / writer main body 12 can be made satisfactorily.
[0029]
The electromotive force generated in the antenna coil 27 by the magnetic flux interlinking with the antenna coil 27 is in the opposite direction between the handheld reader / writer body 12 and the opposite side, but on the handheld reader / writer body 12 side. However, since the magnetic flux density is higher than that on the opposite side, sufficient electric power can be obtained.
[0030]
In this way, the handheld reader / writer main body 1 can be communicated with the ID tags 26 of all the dishes 25 by moving along the dishes 25 group stacked on the table, and then the main control. The MPU 12 of the unit 6 calculates the amount to be paid by the customer from the type (price) and the number of each dish 25 stored in the RAM 16.
[0031]
FIG. 10 shows a second embodiment of the present invention. In this embodiment, the antenna coil 36 on the dish 25 side is formed in a flat shape so that the opposing side portions 37a and 37b are close to each other, and is circularly formed with a first coil 37 bent in an arc shape. It is characterized by the fact that it is composed of the formed second coil 38. The first coil 37 is disposed on the yarn bottom 25a of the tray 25 so that the opposite side portions 37a and 37b are up and down like the antenna coil 27 of the first embodiment. The coil 38 is disposed substantially horizontally at the bottom of the dish 25. The first and second coils 37 and 38 are connected in series.
[0032]
In such a configuration, when the handheld reader / writer main body 1 is held on the plate 25 with the head 3 facing downward and the totaling operation is performed, the first coil 37 has a handheld reader / writer. both side portions 37a by the magnetic flux emanating from the writer main body 1, but the electromotive force generated by 37b is intends if cancel is opposite to each other, the electromotive force generated in the second coil 38 and the magnetic flux linking that is disposed horizontally Thus, power for operation can be obtained. Therefore, in the dish 25 of the present embodiment, the handheld reader / writer body 1 can communicate with the handheld reader / writer body 1 regardless of whether the handheld reader / writer body 1 is held on the dish 25 or held sideways.
[0033]
11 to 13 show a third embodiment of the present invention. The feature of this embodiment is that the antenna coil 39 on the dish 25 side is composed of a continuous coil having a plurality of small coils 40 formed in series by winding with the same number of turns in the same direction as shown in FIG. By the way. As shown in FIG. 12, the continuous coil 39 is formed in a cylindrical shape as a whole, and is arranged around the yarn bottom 25a of the tray 25 so that the opposite side portions 40a, 40b of the small coil 40 are vertically positioned. It is arranged.
[0034]
When configured in this way, the same effect as in the first embodiment can be obtained, and the connecting wire 41 connecting the small coils 40 is arranged almost horizontally. 41 functions in the same manner as the second coil 38 in the second embodiment, and even if the handheld reader / writer main body 1 is held on the plate 25, good communication can be performed.
[0035]
14 and 15 show a fourth embodiment of the present invention. The difference from the third embodiment is an electromotive force generated by magnetic flux radiated from the handheld reader / writer main body 1 held on the plate 25. FIG. In order to increase the size, the coil 42 wound in a circle is disposed almost horizontally on the bottom of the dish 25.
[0036]
FIG. 16 shows a fifth embodiment of the present invention. The difference from the third embodiment is that the continuous coil 39 is arranged not on the yarn bottom 25a but on the inclined surface 25b portion of the tray 25. FIG.
In this case, since the small coil 40 is disposed in an inclined state, the handheld reader / writer main body 1 is held on the plate 25 or on the plate 25, Among the magnetic fluxes radiated from the transmitting antenna 22, there are many magnetic fluxes interlinking with the small coil 40, and communication can be performed satisfactorily.
The present invention is not limited to the embodiment described above and shown in the drawings. For example, the dish-like article provided with the ID tag 26 is not limited to the dish 25 of the rotating sushi store. Various modifications can be made.
[Brief description of the drawings]
FIG. 1 is a perspective view of a dish showing a first embodiment of the present invention. FIG. 2 is a perspective view of an antenna coil. FIG. 3 is a magnetic field diagram showing a state of magnetic flux interlinking with the antenna coil. FIG. 5 is a perspective view when performing aggregation processing. FIG. 6 is a front view of a handheld reader / writer. FIG. 7 is a block diagram showing an electrical configuration of the handheld reader / writer. 8 is a block diagram showing an electrical configuration of a main control unit. FIG. 9 is a block diagram showing an electrical configuration of a remote control unit. FIG. 10 is a diagram corresponding to FIG. 1 showing a second embodiment of the invention. FIG. 12 is a perspective view of an antenna coil according to a third embodiment of the present invention. FIG. 13 is a development view of the antenna coil. FIG. 14 is an equivalent view of FIG. 12 illustrating a fourth embodiment of the present invention. FIG. 15 is a diagram corresponding to FIG. 13. FIG. 16 is a diagram corresponding to FIG. 17] Figure 1 corresponds diagram showing a conventional example [Fig. 18] Fig. 3 corresponding to FIG EXPLANATION OF REFERENCE NUMERALS
In the figure, 1 is a handheld reader / writer, 22 is a transmission antenna, 23 is a reception antenna, 25 is a dish (dish-shaped article), 26 is an ID tag, 27 and 36 are antenna coils, 37 is a first coil, 38 Is a second coil, 39 is an antenna coil, 40 is a small coil, 41 is a crossover, and 42 is a coil.

Claims (3)

In the dish-shaped article ID tag including an antenna coil for transmitting and receiving radio signals to and from a reader / writer,
For a dish-shaped article having a yarn bottom at the bottom and an inclined surface portion extending upward from the yarn bottom, the antenna coil is disposed on both sides of the antenna coil opposite to each other on the yarn bottom or the inclined surface portion. An ID tag for a dish-shaped article, wherein the ID tag is provided so as to be separated in the vertical direction. The antenna coil, the relative dish-like article, in addition to the first coil in which both side portions facing each other of the coil is provided as spaced in the vertical direction and the second provided in a substantially horizontal state The dish-shaped article ID tag according to claim 1, comprising a coil. In the dish-shaped article ID tag including an antenna coil for transmitting and receiving radio signals to and from a reader / writer,
For the dish-shaped article having a yarn bottom at the bottom and an inclined surface portion extending upward from the yarn bottom, the antenna coil is composed of a continuous coil having a plurality of small coils in series, and the continuous coil is An ID tag for a dish-shaped article, wherein both sides of the small coil facing each other are provided on the yarn bottom or the inclined surface of the dish-shaped article so as to be separated in the vertical direction.

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