JP3632544B2 - ID tag and logistics container with ID tag - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an ID tag and a logistics container with an ID tag provided on an object that can be overlapped, and more particularly to an item that enables communication between ID tags.
[0002]
[Problems to be solved by the invention]
For example, conventionally, a barcode sheet is attached to a container for transporting products to a convenience store in order to indicate the type and number of products stored in the container. However, in the method of displaying the contents of a product using a barcode, the printing of the barcode and the pasting work are complicated.
Therefore, the use of ID tags has been studied. The ID tag communicates with a reader / writer (external communication device) by radio waves, writes data into the memory, or reads data from the memory and transmits it to the reader / writer.
[0003]
When such an ID tag is provided in the container, the driver of the transport truck communicates with each ID tag of the container by a hand-held reader / writer to read / write data. However, the operation of communicating with the ID tags of the containers stacked on the truck bed one by one is not only time consuming, but also requires moving hands, standing and sitting, which is a work with a high degree of fatigue. .
[0004]
The present invention has been made in view of the above circumstances, and its purpose is to communicate with an ID tag of one object as an external communication device in an ID tag provided on a stackable object. An object of the present invention is to provide an ID tag capable of communicating with all of the ID tags of a plurality of stacked objects and a logistics container with an ID tag including the ID tag.
[0005]
[Means for Solving the Problems]
According to the first aspect of the present invention, when a radio wave signal is received from an external communication device, operating power can be obtained from the radio signal and communication with the external communication device can be performed. In addition, when objects provided with ID tags are stacked, communication between ID tags of objects that overlap one another is possible via a transmission means, so the external communication device is one of the objects. By communicating with the ID tag of an object, it is possible to communicate with the ID tags of a plurality of stacked objects. In addition, since the battery of the ID tag is used as a power source only when communication is performed between the ID tags, it has a long life.
[0006]
According to the invention described in claim 2, when it is assumed that, for example, the ID tag of the uppermost object among the stacked objects obtains power from the external communication device and communicates (the same applies in the following description), then The ID tag of the object below also receives a signal for starting communication emitted from the ID tag of the object above and starts the operation using the battery as a power source. A response signal indicating that a signal for starting communication has been received is transmitted. The ID tag of the lowermost object is determined as the final object because a response signal is not transmitted even if a signal for starting communication is transmitted. When the reading signal is transmitted from the ID tag of the upper object, the ID tag of the lowermost object transmits its own data to the ID tag of the upper object via the transmission means.
[0007]
According to the third aspect of the present invention, when data is transmitted from the ID tag of the lower object via the transmission means, the data together with the data is transmitted to the ID tag of the upper object via the transmission means. To send. For this reason, the data stored in the ID tag of the target object is collected in order from the ID tag of the lowermost target object, and is sequentially transmitted to the ID tag of the upper target object. For this reason, the data transmission time can be shortened as compared with the case where the data of the ID tag is transmitted one by one from the lowest object.
[0008]
In the invention according to claim 4, the ID tag of the uppermost object transmits its own data to the external communication device by radio waves together with all the data transmitted from the ID tags of all the objects below. Therefore, the external communication device can obtain data of all ID tags at the same time instead of obtaining data one by one from the ID tags of the stacked objects. Time can be shortened.
[0009]
According to the ID tag of the fifth aspect, when the objects are stacked, the conductors provided on the upper and lower objects are opposed to each other to form a capacitor, and data is transmitted and received by this capacitor. Can send and receive data.
[0010]
According to the container for physical distribution with an ID tag according to claim 6, data can be transmitted to and received from all containers by communicating with one of the containers in a state where the containers are stacked, unlike the conventional case.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings by applying it to a container as a distribution container.
As shown in FIG. 2, a container 1 (data acquisition object) as a physical distribution container is made of, for example, plastic, and an antenna coil 2 for transmitting and receiving radio signals and a tag body 3 are provided inside one side surface portion thereof. An ID tag 4 is embedded. As shown in FIG. 1, the tag main body 3 includes a resonance capacitor 5, a control IC chip 6 as an ID tag main part, and a smoothing part 7.
[0012]
The control IC chip 6 is a chip in which semiconductor elements constituting the rectifying unit 9, the modem unit 10, the memory unit 11 and the like are formed in addition to an MPU (microprocessor unit) 8 as a control means. The smoothing unit 7 includes a smoothing capacitor and a Zener diode (not shown).
The resonance capacitor 5 is connected in parallel with the antenna coil 2 to constitute a resonance circuit. When a predetermined high-frequency power radio signal is transmitted from the outside to the resonance circuit, the resonance circuit receives the power radio signal by the antenna coil 2 and inputs the received power radio signal to the rectifying unit 9. The rectifying unit 9 constitutes a power supply circuit as an operation power supply forming unit together with the smoothing unit 7, rectifies and smoothes the electric power radio signal, and supplies it to the MPU 8 or the like as a constant voltage DC power supply (operation power supply). To do.
[0013]
A signal such as a command or data sent from the external communication device is transmitted by being superimposed on a power radio signal, and the signal is demodulated by the modem 10 and given to the MPU 8. The MPU 8 operates in accordance with an operation program stored in the ROM of the memory unit 11, executes a process according to a signal input from the modem unit 10, and erases received data such as an EEPROM ROM of the memory unit 11. The data is written into a possible non-volatile memory, or the data is read from the memory unit 11, modulated by the modem unit 10, and transmitted as a radio wave signal from the antenna coil 2.
[0014]
As an external communication device, there is a hand-held reader / writer 12 shown in FIG. The reader / writer 12 is used for writing the type and number of products accommodated in the container 1 into the ID tag 4 and reading out from the ID tag 4, and incorporates a battery 13 shown in FIG. ing. The reader / writer 12 is provided with a head 15 at the tip of an operation unit 14 that also serves as a hand-held unit, and the operation unit 14 is provided with various keys 14a. 16 (see FIG. 11) is provided.
[0015]
Inside the reader / writer 12, as shown in FIG. 11, an MPU 17, a ROM 18, a RAM 19 and the like are provided. Upon receiving a signal from the operation unit 14 side, the MPU 17 operates according to an operation program stored in the ROM 18 and reads / writes data from / to the ID tag 4.
[0016]
The head 15 of the reader / writer 12 is provided with a transmission antenna 20 and a reception antenna 21 for communicating with the ID tag 4. When communicating with the ID tag 4, the MPU 17 first modulates only the carrier signal by the modulation unit 22 and transmits it as a power radio signal from the transmission unit 23 via the transmission antenna 20. Thereafter, the MPU 17 reads out the data to be transmitted from the RAM 19, modulates the data to be superimposed on the power radio signal by the modulation unit 22, and transmits the data from the transmission unit 23 via the transmission antenna 20.
[0017]
On the other hand, the radio wave signal transmitted from the ID tag 4 is received by the receiving unit 24 via the receiving antenna 21, demodulated by the demodulating unit 25, and discriminated as data. The MPU 17 stores the data sent from the demodulator 25 in the RAM 19, and the data stored in the RAM 19 is finally transmitted to a computer (not shown) connected to the input / output unit 26.
[0018]
Thus, the ID tag 4 can communicate not only with the reader / writer 12 but also between the ID tags 4. That is, as shown in FIG. 2, a pair of plate-like conductors 27, 28 and 29, 30 are embedded in the surface layer portions of the upper and lower end surface portions of one side surface portion of the container 1, respectively. These conductors 27 to 30 are used for signal transmission with the ID tag 4 of the other container 1. Of the two conductors 27, 28 and 29, 30 on the upper side and the lower side, one conductor 27, 29 is For signal input, the other conductors 28 and 30 are for signal output. Both input conductors 27 and 29 are connected to the input terminal of the amplifier 31, and the output terminal of the amplifier 31 is connected to the input section 32 of the tag body 3. Both output conductors 28 and 30 are connected to the output terminal of the amplifier 33, and the input terminal of the amplifier 33 is connected to the output section 34 of the tag body 3.
[0019]
The input conductors 27 and 29 and the output conductors 28 and 30 are, when the container 1 is stacked up and down, the lower output conductor 30 of the upper container 1 and the upper input conductor of the lower container 1 as shown in FIG. 27, the lower input conductor 29 of the upper container 1 and the upper output conductor 28 of the lower container 1 are opposed to each other via a plastic (dielectric material) which is a forming material of the container 1, so as to constitute a capacitor as a transmission means. It has become. In addition, plate-like connecting conductors 35 are provided on the upper and lower surfaces of each container 1 so that the conductors 27 and 30 and the conductors 28 and 29 of the two upper and lower containers 1 constituting the capacitor form a closed circuit. When the containers 1 are stacked one above the other, the connection conductors 35 of the upper and lower containers 1 are in contact with each other.
[0020]
Data exchange between the ID tags 4 employs a frequency shift keying (FSK) system in which “0” and “1” of data to be transmitted correspond to two frequencies. In this embodiment, “0” is used. Corresponds to a pulse signal of 100 KHz, and “1” corresponds to a pulse signal of 150 KHz. When the ID tag 4 of each container 1 communicates with the ID tag 4 of another container 1, the pulse signal of the above frequency is output from the output unit 34, and the pulse signal is amplified by the amplifier 33 to be output conductors 28, 30.
[0021]
Then, charging / discharging is repeatedly performed between the input conductors 27 and 29 of the other container 1 facing the output conductors 28 and 30, and the input unit 32 of the ID tag 4 of the other container 1. Is supplied with a pulsed voltage signal. Then, the MPU 8 analyzes the signal received at the input unit 32 and executes processing according to the analysis content.
[0022]
The ID tag 4 of each container 1 includes a battery 36 as an operation power source for performing communication between the ID tags 4 as described above. The battery 36 is configured to supply power to the ID tag 4 via a relay 37 as an opening / closing means. The relay 37 is composed of a semiconductor switching element such as a transistor, and is turned on when a voltage higher than a certain value is applied.
[0023]
The relay 37 is controlled to be opened and closed by a detection unit 38 as signal detection means connected to the input conductors 27 and 29. The detection unit 38 includes an integration element, and integrates the pulse voltage applied to the input conductors 27 and 29 and applies it to the relay 37. When the integrated voltage of the detection unit 38 becomes equal to or higher than a certain value, the relay 37 is turned on, the ID tag 4 is operated using the battery 36 as a power source, and the ON signal of the relay 37 is sent to the control IC chip 6. Given.
[0024]
Next, the operation of the ID tag 4 configured as described above will be described with reference to the flowcharts shown in FIGS. As shown in FIG. 2, when data is read from the ID tags 4 of all the stacked containers 1 in a state where a plurality of containers 1 are stacked, the operator sets the reader / writer 12 to the ID of the uppermost container 1. Hold the key 4 next to it and operate the key switch to start reading. Here, for simplification of explanation, the number of stacked containers 1 is assumed to be four, which are referred to as the lowest, second, third, and uppermost containers 1 in order from the bottom, and the ID tag 4 of each container 1 Is referred to as the ID tag 4 of the lowermost container 1, but is abbreviated as the lowermost ID tag 4.
[0025]
When the reading start key switch of the reader / writer 12 is operated, as shown in FIG. 4, the MPU 17 of the reader / writer 12 determines “YES” in step S1 to determine whether or not the key switch is turned on. After transmitting the power radio signal in step S2, a stacked ID get-up command is transmitted by superimposing it on the power radio signal in step S3.
[0026]
The power radio signal and the stacked ID get-up command are received by the antenna coil 2 of the uppermost ID tag 4. The uppermost ID tag 4 obtains operating power from the power radio signal and starts its operation, and the MPU 8 executes the routine after receiving the power radio signal shown in FIG.
[0027]
When the routine shown in FIG. 5 is started, the MPU 8 of the uppermost ID tag 4 first receives a command transmitted from the reader / writer 12 in step SA1, and the command received in the next step SA2 is a stacked ID get-up command. Determine whether or not. If the received command is not a stacked ID get-up command, the MPU 8 of the ID tag 4 becomes “NO” in step SA2, and executes processing according to the received command in the next step SA3, and ends.
[0028]
If the received command is a stacked ID get-up command, the MPU 8 of the ID tag 4 becomes “YES” in step SA2, and the output unit 34 outputs the pulse-shaped battery-on signal shown in FIG. After that, the process goes to step SA5 to monitor whether or not a response signal is received within a predetermined time.
[0029]
When a battery-on signal is output from the MPU 8 of the uppermost ID tag 4, a capacitor composed of the lower output conductor 30 of the uppermost container 1 and the upper input conductor 27 of the third container 1 is charged. The discharge is repeated, and the voltage of the upper input conductor 27 of the third-stage container 1 changes as shown in FIG. 7B. The voltage of the upper input conductor 27 is input to the detection unit 38, and the detection unit 38 integrates the voltage of the upper input conductor 27 as shown in FIG. 7C and applies the integrated voltage to the relay 37. .
[0030]
When the integrated voltage of the detection unit 38 becomes equal to or higher than a certain value (at time t0 in FIG. 7), the relay 37 is turned on, operating power is supplied from the battery 36 to the ID tag 4, and the control IC chip 6 is turned on. A signal is input. Thereby, the ID tag 4 in the third stage starts operation, and the MPU 8 starts the routine after the battery is turned on shown in FIG. 6 based on the input of the ON signal from the relay 37.
[0031]
When the MPU 8 of the third-stage ID tag 4 starts the routine of FIG. 6, first, in step SB1, a response signal for returning a battery-on signal is output to the uppermost ID tag 4. When a response signal composed of a pulse signal is output from the third stage ID tag 4, a capacitor composed of the upper output conductor 28 of the third stage container 1 and the lower input conductor 29 of the uppermost container 1. Is repeatedly charged and discharged, the voltage of the lower input conductor 29 of the uppermost container 1 changes in a pulse shape, and this pulse voltage signal is given to the MPU 8 as a response signal via the input unit 32. It becomes like this. Then, the MPU 8 of the uppermost ID tag 4 becomes “YES” in Step SA5 of FIG. 5 and proceeds to Step SA6 for determining whether or not the next stage number data has been received.
[0032]
The MPU 8 of the third stage ID tag 4 outputs a response signal in step SB1, then outputs a battery-on signal in the second step SB2, and monitors whether or not the response signal is received within a predetermined time. ("NO" in step SB3 and "NO" in step SB4).
[0033]
When a battery-on signal is output from the third-stage ID tag 4, the second-stage ID tag 4 obtains operating power from the battery 36 and starts operating in the same manner as described above. After the response signal is output to 4 and the battery-on signal is sequentially output to the ID tag 4 in the second stage, whether or not the response signal is received within a predetermined time is monitored. Thereafter, the ID tag 4 in the second stage and the lowermost stage obtains operating power from the battery 36 by the battery-on signal transmitted from the ID tag 4 in the upper stage, starts operation, and outputs a response signal ( Along with step SB1), a battery-on signal is output (step SB2), and whether or not a response signal is received within a predetermined time is set (NO in step SB3, “NO” in step SB4). repetition).
[0034]
By the way, the ID tag 4 in the third, second, and lowermost stages immediately starts operation and outputs a response signal when a battery-on signal is transmitted, so the uppermost, third, and second stages. Each of the ID tags 4 becomes “YES” in step SB3 of the routine of FIG. 6 and shifts to next step SB5 to monitor whether or not the stage number data has been received.
[0035]
However, the container 1 does not exist under the lowermost container 1, and therefore, no response signal is returned to the lowermost ID tag 4. For this reason, the MPU 8 of the lowest ID tag 4 determines “YES” in step SB4 when a predetermined time has elapsed, creates the stage number (initial stage) data in the next step SB14, and outputs the stage number data in step SB15. Thereafter, the process proceeds to step SB16 where it is determined whether or not a data read command has been received.
[0036]
The format of the above-mentioned column number data is shown in FIG. The text part is composed of a stage number information part indicating how many containers 1 exist below including its own container 1, and “FCX” next to the text part is a frame check sequence such as CRC, and the last “ETX”. Indicates the end of the text.
[0037]
When the number of stages (first stage) data is output from the lowermost ID tag 4, the upper output conductor 28 of the lowermost container 1 and the lower input conductor 29 of the second stage container 1, as in the case of the response signal. Since the capacitor constituted by the above-described capacitor repeatedly charges and discharges, the voltage of the second-stage lower input conductor 29 changes, and the voltage signal is input to the second-stage ID tag 4 as the stage number data. Then, the MPU 8 of the second-stage ID tag 4 determines “YES” in step SB5 of FIG. 6, and edits the stage number data in the next step SB6. The stage number data edited by the MPU 8 of the second stage ID tag 4 is shown in FIG. 8B, and the text part shows the stage number data transmitted from the lower (lowermost) stage ID tag 4. A value obtained by adding “1” to the number of stages, that is, “2” is described.
[0038]
Thereafter, the MPU 8 of the second stage ID tag 4 outputs the edited stage number data from the input / output unit 34 which should be transmitted to the MPU 8 of the upper third stage ID tag 4. The number-of-stage data output from the second-stage ID tag 4 is input to the third-stage ID tag 4 in the same manner as described above. “YES” is determined, and the step number data is edited and transmitted to the uppermost ID tag 4 in the next step SB6.
[0039]
Thus, the stage number data created by the lowermost ID tag 4 is sequentially transmitted to the upper stage ID tag 4 and edited in sequence, and when the uppermost ID tag 4 receives the stage number data, the ID tag 4 determines “YES” at step SA6 in FIG. 5 and edits the stage number data at the next step SA7. The stage number data edited by the uppermost ID tag 4 is described as “4” indicating the total stage of the container 1 in which the text portions are stacked as shown in FIG. 8C.
[0040]
The ID tag 4 at the uppermost stage edits the stage number data, transmits the stage number data from the antenna coil 2 (step SA8), and then monitors whether or not a data read command has been received (step S8). SA9).
[0041]
The stage number data transmitted from the uppermost ID tag 4 by the radio wave signal is received by the reader / writer 12. Then, the MPU 17 of the reader / writer 12 determines “YES” in step S4 of FIG. 4, transmits a stacked ID data read command in the next step S5, and then monitors whether or not data is received in step S6. Migrate to
[0042]
When the stacked ID data read command is transmitted from the reader / writer 12, the MPU 8 of the uppermost ID tag 4 determines “YES” in step SA9, outputs the data read command in the next step SA10, and responds as a response. It becomes a state to monitor whether or not the data is received. The data read command output from the uppermost ID tag 4 is received by the third ID tag 4. The third-stage ID tag 4 that has received the data command determines “YES” in step SB8, and outputs the data command to the second-stage ID tag 4 in the next step SB9. Whether or not data has been received is monitored (step SB10 in FIG. 6).
[0043]
As described above, the data read command is sequentially transmitted to the lower ID tag 4 in the same manner as the battery-on signal described above, and the ID tag 4 at each stage monitors whether or not data as a response has been received. It becomes a state to do. When receiving the data read command, the MPU 8 of the lowest ID tag 4 determines “YES” in step SB16, reads out the data stored in the memory unit 11 and transmits it from the output unit 34 in the next step SB17. And end. The data transmitted by the MPU 8 of the ID tag 4 at the lowest level is shown in FIG. 9A. In the text portion, the stage number data and the data read from the memory unit 11 are described.
[0044]
The data output from the lowest ID tag 4 is received by the MPU 8 of the second ID tag 4 in the same manner as described above. Then, the MPU 8 of the second-stage ID tag 4 determines “YES” in step SB10 of FIG. 6, reads the data in the memory unit 11 in the next step SB11, and performs data editing in step SB12. As a result of this data editing, the transmission data created by the MPU 8 of the second stage ID tag 4 is modified and added to the data transmitted from the MPU 8 of the lowermost ID tag 4 as shown in FIG. 9B. In this form, the part indicating the number of stages is corrected to “2” which is the total number of stages of the container 1 below including its own container 1 as described above, and the part indicating the read data is read at the bottom stage. The data read from the second-stage memory unit 11 is added to the data.
[0045]
The MPU 8 of the second-stage ID tag 4 transmits the edited data from the output unit 34 and becomes the end. The data transmitted from the second-stage ID tag 4 is received by the third-stage ID tag 4 in the same manner as described above. Then, the MPU 8 of the third-stage ID tag 4 reads the data in the memory unit 11 (step SB11) and performs data editing (step SB12). In the transmission data edited by the MPU 8 of the second-stage ID tag 4, the part indicating the number of stages is corrected to “3” as shown in FIG. 9B, and the read data part is changed to the data in the lowest and second stages. The data read from the memory unit 11 of the third-stage ID tag 4 is added.
[0046]
The data created by the MPU 8 of the third stage ID tag 4 is received by the MPU 8 of the uppermost stage ID tag 4 in the same manner as described above. Then, the MPU 8 of the uppermost ID tag 4 determines “YES” in step SA11 in FIG. 5, reads data in the memory unit 11 in step SA12, and then performs data editing in step SA13. As a result of this data editing, the transmission data created by the MPU 8 of the uppermost ID tag 4 is “4” in which the part indicating the number of stages is the total number of stages of the container 1 as shown in FIG. All the data read from the memory part 11 of each ID tag 4 of the lowest level, the 2nd level, the 3rd level, and the top level are described.
[0047]
After the data editing, the MPU 8 of the uppermost ID tag 4 moves to step SA14 to transmit the edited data from the antenna coil 2 and becomes the end. This data is received by the reader / writer 12, and the MPU 17 of the reader / writer 12 determines “YES” in step S6 of FIG. 4 and ends.
Note that data can be written to the ID tag 4 of each stacked container 1 in the same manner as in the above-described reading.
[0048]
As described above, according to the present embodiment, data can be transmitted and received between the MPUs 8 of the ID tag 4 of the container 1 that are stacked one above the other. Therefore, the reader / writer 12 is stacked only by communicating with the MPU 8 of the uppermost ID tag 4. It is possible to communicate with all the ID tags 4 of the container 1 and write data to these ID tags 4 or read data from these ID tags 4. For this reason, it is not necessary to move the reader / writer 12 to communicate with each one of the MPUs 8 of the ID tag 4 of the container 1 at each stage, and it is possible to easily read and write in a short time.
Further, in the present embodiment, the battery 36 of the MPU 8 of the ID tag 4 is used as an operation power source only when communicating with the MPU 8 of the ID tag 4, so that power consumption can be minimized. The lifetime can be extended.
[0049]
The present invention is not limited to the embodiments described above and shown in the drawings, and can be expanded or changed as follows.
The object is not limited to the container 1.
The transmission means is not limited to constituting a capacitor with the conductors 27 to 30 but may be constituted by a transmission line connected by a jack and a plug.
The ID tag 4 that communicates with the reader / writer 12 by radio waves is not limited to that of the uppermost container 1, but may be that of the lowermost container 1 or the container 1 in the middle. However, when communicating with the ID tag 4 of the middle container 1 among the containers 1 in which the reader / writer 12 is stacked, two MPUs 8 are provided in each ID tag 4 and one MPU is provided in the upper container 1. The MPU that controls communication with the ID tag 4 and the other MPU must be the MPU that controls communication with the ID tag 4 of the container 1 at the lower stage.
[Brief description of the drawings]
FIG. 1 is an electrical circuit configuration diagram of an ID tag showing an embodiment of the present invention.
FIG. 2 is a perspective view showing a state in which containers are stacked.
3 is a cross-sectional view taken along line II-II in FIG.
FIG. 4 is a flowchart showing control contents of a reader / writer.
FIG. 5 is a flowchart showing control contents of the uppermost ID tag.
FIG. 6 is a flowchart showing the control contents of other ID tags except the uppermost ID tag.
FIG. 7 is a diagram illustrating the voltage of each unit and the relay-on timing when a battery-on signal is transmitted.
FIG. 8 is a diagram showing the contents of stage number data
FIG. 9 is a diagram showing the contents of read data
FIG. 10 is a side view of a reader / writer.
FIG. 11 is a block diagram showing an electrical configuration of the reader / writer.
[Explanation of symbols]
In the figure, 1 is a container (distribution container), 2 is an antenna coil, 3 is a tag body, 4 is an ID tag, 6 is a control IC (ID tag main part), 12 is a reader / writer (external communication device), 27 Is an upper input conductor plate (transmission means), 28 is an upper output conductor plate (transmission means), 29 is a lower input conductor plate (transmission means), 30 is a lower input conductor plate (transmission means), 36 is a battery, and 37 is a relay. , 38 are detection units (signal detection means).

Claims (6)

In ID tags provided on stackable objects,
An ID tag main part that obtains operating power by receiving a radio signal from an external communication device and performs radio wave communication with the external communication device;
Transmission means for communicating with the main part of the ID tag of other objects located above and below in a state where the objects are stacked;
A signal detection means for detecting a signal for starting communication transmitted from the ID tag main part of the other object via the transmission means;
An ID tag comprising: a battery for supplying operating power to the main part of the ID tag when the signal detecting means detects a signal for starting communication. When a signal for starting communication is received from the other object, response signal generating means for transmitting a response signal to the object that has issued the signal for starting communication via the transmission means is provided.
When the ID tag main part transmits a signal for starting communication to the other object located above or below, the response signal generation means of the other object does not transmit the response signal. 2. The ID tag according to claim 1, wherein the ID tag is determined to be a final target object, and its own data is transmitted to the target object that has transmitted a signal for starting communication via the transmission unit. When data is transmitted from the other object via the transmission means, the data together with the transmitted data is transferred to another object on the opposite side of the other object. 3. The ID tag according to claim 1, wherein the ID tag is transmitted via a transmission means. When the ID tag main unit obtains operating power from a radio wave signal from the external communication device, and when data is transmitted from the other object via the transmission means, the ID tag main unit The ID tag according to claim 1, wherein the data is transmitted to the external communication device by radio waves. The transmission means includes conductors disposed on both sides of the object in the stacking direction, and when the objects are stacked, the conductors of the objects positioned above and below constitute a capacitor so as to face each other. Item 5. The ID tag according to any one of Items 1 to 4. A logistics container with an ID tag, comprising the ID tag according to claim 1.

Images