JP2000306065A - Data carrier for noncontact identification data communication - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the restrictions of a use place by setting a communication frequency different from noise by freely setting the communication frequency to a frequency different from noise. SOLUTION: Identification data are stored in an IC chip of the data carrier B. On the top surface of the disklike carrier main body 40 of the data carrier B, a transmission frequency setting dial 41a and a reception frequency setting dial 41b are provided rotatably. When one scale is selected by rotating the transmission frequency setting dial 41a, the coil and capacitance of a transmission part vary in inductance and capacitance and a resonance frequency varies to the transmission frequency corresponding to the selected scale, thereby setting the transmission frequency. When one scale is selected by rotating the reception frequency setting dial 41b, the reception frequency corresponding to the selected scale is set.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data carrier for non-contact identification data communication for non-contact communication of identification data used for physical distribution management and article management with a scanner.

[0002]

2. Description of the Related Art Conventionally, distribution management and article management are performed by communicating identification data between a data carrier and a scanner in a non-contact manner. The data carrier holds information unique to the article (object) to which it is attached as identification data. The scanner communicates with the data carrier to write and read identification data. The communication between the data carrier and the scanner is performed using electromagnetic waves including identification data.

[0003]

However, if the communication frequency is the same as the frequency of noise (environmental noise) existing in the place where the data carrier and the scanner are used, communication may not be possible due to the influence of noise, and the place where the noise is small There were restrictions on where to use, such as searching for

[0004] The present invention has been made in view of the above points, and provides a data carrier for non-contact identification data communication that can be set to a communication frequency different from that of noise and can reduce restrictions on the place of use. It is intended to do so.

[0005]

According to a first aspect of the present invention, there is provided a data carrier for non-contact identification data communication, wherein non-contact identification data communication for reading and writing identification data from a scanner by performing communication using electromagnetic waves. Data carrier B
Wherein the communication frequency is set to be freely set to a frequency different from the noise.

A data carrier B for non-contact identification data communication according to a second aspect of the present invention, in addition to the configuration of the first aspect, is characterized in that the transmission frequency can be set freely by operating a transmission frequency setting dial 41a. It is a feature.

A data carrier B for non-contact identification data communication according to a third aspect of the present invention, in addition to the configuration of the first or second aspect, is configured such that the reception frequency can be set freely by operating a reception frequency setting dial 41b. It is characterized by the following.

According to a fourth aspect of the present invention, in addition to the configuration of the first aspect, the data carrier B for non-contact identification data communication is configured such that a transmission frequency can be freely set by operating a transmission frequency setting switch 61a. It is a feature.

According to a fifth aspect of the present invention, in addition to the configuration of the first or fourth aspect, the data carrier B for contactless identification data communication is configured such that the reception frequency can be set freely by operating the reception frequency setting switch 61b. It is characterized by the following.

[0010]

Embodiments of the present invention will be described below.

FIGS. 2A and 2B show an example of the scanner A. FIG. On the upper surface of the box-shaped scanner body 20, a setting display means 9 formed by a liquid crystal screen or the like, and a pair of influence degree display means 1 formed by red and green light emitting diodes (LEDs) and the like.
0 is provided. In addition, a transmission frequency setting operation unit 5a and a reception frequency setting operation unit 5b are rotatably provided on the front surface of the scanner body 20 as dial type (channel type) operation units 5. As shown in FIG. 2B, the transmission frequency setting operation unit 5a and the reception frequency setting operation unit 5b have
Scales up to 7 are provided. Further, a noise measurement switch 7 is provided on a side surface of the scanner main body 20.

FIG. 3 is a block diagram of the scanner A shown in FIG. Reference numeral 4 denotes control means for controlling the operation of the scanner A, which is formed by a microcomputer in which the control described later is programmed. 23 is a transmission unit,
It is provided with a coil 2 having a variable inductance and a capacitor 3 having a variable capacitance. A transmission antenna 24 is connected to the transmission unit 23 via a first antenna changeover switch 27. As shown in FIG. 4, a resonance circuit in which the coil 2, the capacitor 3, and the transmission antenna 24 are connected in series is formed. ing. Reference numeral 25 denotes a receiver, which is a coil 2 having a variable inductance.
And a capacitor 3 having a variable capacitance. A reception antenna 26 is connected to the reception unit 25 via a second antenna changeover switch 28. As shown in FIG. 4, a resonance circuit in which the coil 2, the capacitor 3, and the reception antenna 26 are connected in series is formed. ing.

One scale of the transmission frequency setting operation section 5a is associated with one transmission frequency. In other words, the transmission frequency of (f + a) Hz is on the scale of 0, the transmission frequency of (f + b) Hz is on the scale of 1, the transmission frequency of (f + c) Hz is on the scale of 2, and the transmission frequency of (f + c) Hz is on the scale of 3. f +
d) The transmission frequency of Hz is (f−d) H on the scale of 4.
The transmission frequency of z is a transmission frequency of (fc) Hz on a scale of 5, a transmission frequency of (fb) Hz on a scale of 6, and a transmission frequency of (fa) Hz on a scale of 7. The transmission frequencies correspond to each other. The set values of these transmission frequencies are stored in the control means 4 in advance. When one scale is selected by rotating the transmission frequency setting operation unit 5a, the inductance of the coil 2 of the transmission unit 23 and the capacitance of the capacitor 3 change according to a command from the control unit 4, and the transmission corresponding to the selected scale is performed. The resonance frequency changes to be the frequency. In this manner, the transmission frequency can be changed stepwise (digitally) and set by operating the transmission frequency setting operation section 5a.

One scale of the reception frequency setting operation section 5b is associated with one reception frequency. That is, the reception frequency of (f + a) Hz is 1 on the scale of 0.
The (f + b) Hz reception frequency is on the scale of (2), the (f + c) Hz reception frequency is on the scale of 2, the (f + d) Hz reception frequency is on the scale of 3, and the (f−) is on the scale of 4.
d) The reception frequency of Hz is (fc) H on the scale of 5.
The reception frequency of z corresponds to the reception frequency of (f−b) Hz on the scale of 6, and the reception frequency of (fa) Hz corresponds to the scale of 7. These set values of the reception frequency are stored in the control means 4 in advance. When one scale is selected by rotating the reception frequency setting operation section 5b, the inductance of the coil 2 of the reception section 25 and the capacitance of the capacitor 3 are changed by a command from the control means 4, and the reception corresponding to the selected scale is changed. The resonance frequency changes to be the frequency. In this manner, the reception frequency can be changed stepwise (digitally) and set by operating the reception frequency setting operation section 5b.

If the transmission frequency and the reception frequency can be set stepwise, for example, the transmission frequency and the reception frequency are set to a frequency between the frequency corresponding to the 0 scale and the frequency corresponding to the 1 scale. Can not do it. Therefore, it is necessary to continuously vary the coil 2 and the capacitance that can continuously vary the inductance so that the transmission frequency and the reception frequency can be continuously (analogly) set within a certain range. An available capacitor 3 is used, and the control means 4 holds a transmission frequency and a reception frequency in a certain continuous frequency range in advance. As described above, by continuously setting the transmission frequency and the reception frequency, the reception frequency and the transmission frequency can be finely adjusted.

Further, as shown in FIG. 5, the transmission frequency setting operation section 5a and the reception frequency setting operation section 5b may be formed by slide-movable switches which are slidably mounted on the surface of the scanner body 20. good. In this case, scales 0 to 7 are provided on the upper surface of the scanner main body 20 in the vicinity of the transmission frequency setting operation section 5a and the reception frequency setting operation section 5b, and the transmission frequency and reception scale corresponding to the scale selected by the movement are provided. The frequency can be set.

The scanner A can measure ambient noise (environmental noise). First, when the power is turned on, the first antenna changeover switch 27 and the second antenna changeover unit 28 operate according to a command from the control unit 4, and the transmission antenna 24 and the reception unit 25 are connected. In this state, noise near the currently set transmission frequency is fetched from the transmission antenna 24 and sent to the receiving unit 25, and then fetched by the control unit 4, where the noise frequency and level are determined. . The frequency and level of this noise are sent to the setting display means 9 under the control of the control means 4 and displayed.
Also, based on the measured noise frequency and level,
The available transmission frequency at which the noise can be transmitted at least at the lowest level without disturbing the noise is determined by the control means 4.
Is determined. This usable transmission frequency is controlled by the control means 4.
Is sent to the setting display means 9 to be displayed.

As described above, since the setting display means 9 displays the determination result of the noise frequency, the determination result of the noise level, and the determination result of the usable communication frequency, the user can accurately grasp the situation of the noise. Can be used as a reference for setting the transmission frequency.

Further, based on the measured frequency and level of the noise, when the control means 4 determines that the degree of the influence of the noise on the transmission at the currently set transmission frequency is large, the communication environment is changed. One (for example, red) influence degree display means 10 indicating a bad condition is
On the other hand, if the control means 4 determines that the measured noise has little effect on the transmission at the currently set transmission frequency, the control means 4 indicates that the communication environment is good. For example, green) influence degree display means 1
0 lights up under the control of the control means 4. When the communication distance between the scanner A and the data carrier B is reduced by about 10% as compared with the case where the communication environment is good, the communication environment is determined to be bad. However, the criteria for this determination can be changed as appropriate.

As described above, by displaying the degree of influence of noise on transmission by the influence degree display means 10,
The user can instantly grasp the situation of the noise near the transmission frequency, and can easily and quickly measure the noise.

After measuring the noise near the transmission frequency as described above, the transmission frequency setting operation section 5a is operated as described above.
To set the transmission frequency to a frequency different from the frequency of the noise, so that the noise does not interfere with the transmission, and it is possible to transmit the electromagnetic waves to the data carrier B described below satisfactorily. Can be done.

When the transmission frequency is set, the first antenna changeover switch 27 and the second antenna changeover unit 28 operate according to a command from the control unit 4, and the reception antenna 26 and the reception unit 25 are connected. In this state, noise near the currently set reception frequency is fetched from the reception antenna 26 and sent to the reception unit 25, and then fetched by the control means 4, where the frequency and level of the noise are determined. . The frequency and level of this noise are sent to the setting display means 9 under the control of the control means 4 and displayed. Further, based on the measured frequency and level of the noise, the control means 4 determines an available reception frequency at which the noise can be received at least at the lowest level without causing any disturbance.
This usable reception frequency is sent to the setting display means 9 under the control of the control means 4 and displayed.

As described above, since the setting display means 9 displays the determination result of the noise frequency, the determination result of the noise level, and the determination result of the usable reception frequency, the user can accurately grasp the situation of the noise. This can be used as a reference for setting the reception frequency.

Further, based on the measured noise frequency and level, if the control means 4 determines that this noise has a large effect on reception at the currently set reception frequency, the communication environment is changed. On the other hand, one of the influence degree display means 10 indicating bad is turned on under the control of the control means 4, and conversely, if the degree of influence of the measured noise on the reception at the currently set reception frequency is small, the control means 4 turns on. If it is determined, the other influence level display means 10 indicating that the communication environment is good is turned on under the control of the control means 4.

As described above, the degree of influence of noise on reception is displayed by the influence degree display means 10 so that
The user can instantly grasp the state of the noise near the reception frequency, and can easily and quickly measure the noise.

After measuring the noise near the reception frequency as described above, the reception frequency setting operation section 5b is operated as described above.
Is operated to set the reception frequency to a frequency different from the frequency of the noise, so that the noise does not interfere with the reception, and the electromagnetic wave from the data carrier B described later can be satisfactorily received. Is what you can do.

It is preferable that the transmission frequency and the reception frequency are different from the frequency of the noise by 5 kHz or more, so that the transmission and the reception can be performed well without the noise becoming an obstacle. Further, even if the transmission frequency and the reception frequency are largely different from the noise frequency, the effect does not change, and the transmission frequency and the reception frequency are 5% from the lower limit.
The noise frequency is made different from 0 kHz or less. Further, when measuring the noise, the coil 2
The resonance frequency may be changed by sequentially changing the inductance of the capacitor 3 and the capacitance of the capacitor 3 under the control of the control means 4 to measure noise in a wide frequency range.
In this case, the control means 4 is programmed to measure noise at several frequencies within the range of the resonance frequency that can be changed.

In the above-described scanner A, there is a case where it is desired to measure noise during communication with the data carrier B.
At that time, the noise measurement switch 7 is operated. When the noise measurement switch 7 is operated, the communication is stopped under the control of the control means 4, and the measurement of the noise is performed under the control of the control means 4 prior to all the processing. Since the noise measurement switch 7 is provided as described above, the noise can be measured at any time.

Further, the setting of the transmission frequency and the reception frequency can be automatically performed under the control of the control means 4. That is, after measuring the noise as described above,
The inductance of the coil 2 of the transmission unit 23 and the capacitance of the capacitor 3, and the inductance of the coil 2 of the reception unit 25 and the capacitance of the capacitor 3 are controlled by a command from the control unit 4 so that the usable frequency is selected by the control unit 4. Change the capacitance. As described above, by automatically setting the transmission frequency and the reception frequency by the control means 4, the user does not need to set the transmission frequency and the reception frequency, so that the user's labor can be reduced. is there.

FIG. 6 shows another example of the scanner A. In this scanner A, only one dial-type operation unit 5 is provided on the front of the scanner main body 20, and a changeover switch 6 is provided on a side surface of the scanner main body 20.
The operation unit 5 is formed such that one frequency corresponds to one scale, similarly to the transmission frequency setting operation unit 5a and the reception frequency setting operation unit 5b. The block diagram of the scanner A is the same as that of FIG.

When setting the transmission frequency with the scanner A thus formed, first, the changeover switch 6 is operated to the setting side of the transmission frequency. This operation is input to the control means 4 so that the transmission frequency can be set. Next, when one of the scales is selected by rotating the operation part 5, the coil 2 of the transmission part 23 is controlled by a command from the control means 4. And the capacitance of the capacitor 3 change, and the resonance frequency changes so that the transmission frequency corresponds to the selected scale. In this manner, the transmission frequency can be changed and set stepwise by operating the operation unit 5.

In setting the receiving frequency, first, the changeover switch 6 is operated to the setting side of the receiving frequency. This operation is input to the control means 4 so that the reception frequency can be set. Next, when one of the scales is selected by rotating the operation part 5, the coil 2 of the reception part 25 is controlled by a command from the control means 4. Of the capacitor 3 and the capacitance of the capacitor 3 change, and the resonance frequency changes so that the reception frequency corresponds to the selected scale. In this manner, the reception frequency can be changed and set stepwise by operating the operation unit 5.

Since the scanner A has only one operation unit 5, the structure can be simplified and the operability can be improved as compared with that of FIG.

FIG. 7 shows another example of the scanner A. The scanner A is provided with an external device connection unit 1 which is an interface such as RS232C on the side surface of the scanner body 20. One end of a cable 30 is connected to the external device connection unit 1. The other end of the cable 30 is used to input a signal for controlling the scanner A and input / output data to / from the scanner A. It is connected to an external device 8 such as a personal computer capable of performing the operation.

In the scanner A, the control means 4 is controlled by a signal sent from an external device 8, and performs the same setting of the transmission frequency and the reception frequency, measurement of noise, and communication with a data carrier B described later. And also
The set values of the transmission frequency and the reception frequency, the result of noise measurement, the identification data obtained from the data carrier B, and the like,
The information is displayed on a monitor 31 provided in the external device 8.

FIG. 1 shows an example of the data carrier B. A transmission frequency setting dial 41a and a reception frequency setting dial 41b are rotatably provided on the upper surface of the disc-shaped carrier body 40. The transmission frequency setting dial 41a and the reception frequency setting dial 41b are scaled from 0 to 3.

FIG. 8 shows a block diagram of the data carrier B shown in FIG. Reference numeral 42 denotes an IC chip. The IC chip 42 stores identification data. Reference numeral 43 denotes a transmission unit, as shown in FIG. 9, which is formed to include a coil 52a having a variable inductance and a capacitor 53a having a variable capacitance. The coil 52a and the capacitor 53a are connected in series. The coil 52a is connected to the transmitting / receiving antenna 44, and the capacitor 53a is connected to the IC chip 42. Reference numeral 45 denotes a receiving unit, as shown in FIG. 9, which includes a coil 52b having a variable inductance and a capacitor 53b having a variable capacitance. The coil 52b and the capacitor 53b are connected in series.
The b side is the transmitting / receiving antenna 44, and the capacitor 53b side is I
Each is connected to the C chip 42. A capacitor 46 is provided between the connection between the transmission unit 43 and the transmission / reception antenna 44 and the connection between the reception unit 45 and the transmission / reception antenna 44.
Are connected to each other, and a resonance circuit including the transmission / reception antenna 44, the transmission unit 43, the reception unit 45, and the capacitor 46 is formed.

One scale of the transmission frequency setting dial 41a corresponds to one transmission frequency. That is,
A scale of 0 has a transmission frequency of (f + m) Hz, a scale of 1 has a transmission frequency of (f + n) Hz, a scale of 2 has a transmission frequency of (f-n) Hz, and a scale of 3 has ( f
-M) The transmission frequencies of Hz correspond to each other. Then, when one scale is selected by rotating the transmission frequency setting dial 41a, the inductance of the coil 52a of the transmission unit 43 and the capacitance of the capacitor 53a change, and the resonance frequency is adjusted so that the transmission frequency corresponds to the selected scale. Change. In this way, the transmission frequency can be changed stepwise (digitally) and set by operating the transmission frequency setting dial 41a.

One scale of the reception frequency setting dial 41b is associated with one reception frequency. That is, the reception frequency of (f + m) Hz is on the scale of 0,
A scale of 1 corresponds to a reception frequency of (f + n) Hz, a scale of 2 corresponds to a reception frequency of (f-n) Hz, and a scale of 3 corresponds to a reception frequency of (fm) Hz. . Then, when one scale is selected by rotating the receiving frequency setting dial 41b, the coil 52 of the receiving unit 45 is selected.
The inductance b and the capacitance of the capacitor 53b change, and the resonance frequency changes so that the reception frequency corresponds to the selected scale. In this manner, the reception frequency can be changed stepwise (digitally) and set by operating the reception frequency setting dial 41b.

If the transmission frequency and the reception frequency can be set stepwise, for example, the transmission frequency and the reception frequency are set to a frequency between the frequency corresponding to the 0 scale and the frequency corresponding to the 1 scale. Can not do it. Therefore, the coils 52a and 52b and the capacitance that can continuously vary the inductance are continuously varied so that the transmission frequency and the reception frequency can be continuously (analogly) set within a certain range. Capacitors 53a and 53b that can be used. As described above, by continuously setting the transmission frequency and the reception frequency, the reception frequency and the transmission frequency can be finely adjusted.

FIG. 10 shows another example of the data carrier B.
In the data carrier B, only one dial setting unit 41 is provided on the upper surface of the carrier body 40, and
A changeover switch 49 is provided on the upper surface of the carrier body 40. The dial setting unit 41 is formed so that one scale corresponds to one frequency, similarly to the transmission frequency setting dial 41a and the reception frequency setting dial 41b. The block diagram of the data carrier B is the same as that of FIG.

In setting the transmission frequency with the data carrier B formed as described above, first, the changeover switch 49 is operated to the transmission frequency setting side. With this operation, the transmission frequency can be set. Next, when one dial is selected by rotating the dial setting unit 41, the inductance of the coil 52a of the transmission unit 43 and the capacitance of the capacitor 53a change, and the selected frequency is selected. The resonance frequency changes so that the transmission frequency corresponds to the scale. In this way, the transmission frequency can be changed and set stepwise by operating the dial setting unit 41.

In setting the receiving frequency, first, the changeover switch 49 is operated to the setting side of the receiving frequency. With this operation, the receiving frequency can be set. Next, when one dial is selected by rotating the dial setting unit 41, the inductance of the coil 52b of the receiving unit 45 and the capacitance of the capacitor 53b change. The resonance frequency changes so that the reception frequency corresponds to the scale. Thus, the reception frequency can be changed and set stepwise by operating the dial setting unit 41.

In this data carrier B, the transmission frequency and the reception frequency are set by one dial setting unit 41, so that the structure can be simplified and the operability can be improved as compared with that of FIG. It is.

FIGS. 11A and 11B show another example of the data carrier B. FIG. On the upper surface of the disc-shaped carrier body 40, a linear slide-movable transmission frequency setting switch 61a is provided.
And a reception frequency setting switch 61b. As shown in FIG. 11B, the upper surface of the carrier main body 40 is scaled from 1 to 3 near the transmission frequency setting switch 61a and the reception frequency setting switch 61b.
The block diagram of the data carrier B is the same as that of FIG. 8, but as shown in FIG. 12, the transmitting unit 43 includes a plurality of coils 52c, 52d, and 52e having different inductances and a plurality of capacitors 53c and 53 having different capacitances.
d, 53e and the transmission frequency setting switch 61a. Coil 52c and capacitor 53
c, the coil 52d and the capacitor 53d, and the coil 52e and the capacitor 53e are respectively connected in series, and the coils 52c to 52e are connected to the transmission frequency setting switch 61a.
Are connected to the transmitting / receiving antenna 44 via the capacitors 53c to 5c.
The 3e side is connected to the IC chip 42, respectively.

The receiving section 45 includes a plurality of coils 52f, 52g, 52h having different inductances and a plurality of capacitors 53f, 53g, 53 having different capacitances.
h and the reception frequency setting switch 61b described above. The coil 52f and the capacitor 53f, the coil 52g and the capacitor 53g, and the coil 52h and the capacitor 53h are connected in series, respectively.
The f-52h side is connected to the transmission / reception antenna 44 via the reception frequency setting switch 61b, and the capacitors 53f-53h side are connected to the IC chip 42, respectively. Further, a connecting portion between the transmitting unit 43 and the transmitting / receiving antenna 44, and a receiving unit 45
A capacitor 4 is connected between the transmitting and receiving antenna 44 and the connecting portion.
6 are connected to each other, and a resonance circuit including a transmitting / receiving antenna 44, a transmitting unit 43, a receiving unit 45, and a capacitor 46 is formed.

One scale of the transmission frequency setting switch 61a corresponds to one transmission frequency. That is,
A scale of 1 corresponds to a transmission frequency of (f + m) Hz, a scale of 2 corresponds to a transmission frequency of (f) Hz, and a scale of 3 corresponds to a transmission frequency of (fm) Hz.
When one scale is selected by sliding the transmission frequency setting switch 61a, the transmission frequency setting switch 61a is connected to any one of the coils 52c to 52e of the transmission unit 43, and a set including the coil 52c and the capacitor 53c is formed. Or one of a set consisting of a coil 52d and a capacitor 53d or a set consisting of a coil 52e and a capacitor 53e is selected and brought into a conductive state,
The resonance frequency changes so as to be a transmission frequency corresponding to the selected scale. In this manner, the transmission frequency can be changed stepwise (digitally) and set by operating the transmission frequency setting switch 61a.

One scale of the reception frequency setting switch 61b is associated with one reception frequency. That is, the reception frequency of (f + m) Hz is shown on the scale of 1,
The scale of 2 corresponds to the reception frequency of (f) Hz, and the scale of 3 corresponds to the reception frequency of (fm) Hz. When one scale is selected by sliding the reception frequency setting switch 61b, the reception frequency setting switch 61b is connected to any one of the coils 52f to 52h of the reception unit 45, and the coil 52f and the capacitor 53 are connected.
f, or a coil 52g and a capacitor 53
g, or a coil 52h and a capacitor 53
h, one of the sets of h is selected to be in a conductive state, and the resonance frequency changes so as to be a reception frequency corresponding to the selected scale. In this way, the reception frequency can be changed stepwise (digitally) and set by operating the reception frequency setting switch 61b.

Note that only one of the transmission frequency setting switch 61a and the reception frequency setting switch 61b may be provided.

Next, communication between the scanner A and the data carrier B will be described. First, the transmission frequency and the reception frequency of the scanner A are set to different frequencies from the noise. Next, the reception frequency of the data carrier B is set to a frequency at which the electromagnetic wave corresponding to the transmission frequency of the scanner A is easily received. The transmission frequency of the data carrier B is set to a frequency at which the electromagnetic wave corresponding to the reception frequency is easily transmitted. The transmission frequency of the scanner A and the reception frequency of the data carrier B, and the reception frequency of the scanner A and the transmission frequency of the data carrier B are preferably the same, but may not be intentionally made to match. When the transmission frequency of the scanner A and the reception frequency of the data carrier B are not the same, and when the reception frequency of the scanner A and the transmission frequency of the data carrier B are not made to coincide with each other, it is adopted when it is desired to shorten the communication distance. Is used as an entry / exit management card, the scanner A may read the identification data of two or more persons having this card together, and a person who does not have entry / exit permission may be mistakenly entered / exited. There is. In order to prevent such a malfunction, the communication distance is shortened without matching the transmission frequency of the scanner A with the reception frequency of the data carrier B and the reception frequency of the scanner A with the transmission frequency of the data carrier B.

Then, the data carrier I
When writing the identification data to the C chip 42, the control unit 4 of the scanner A sends a transmission signal including the identification data to the transmission antenna 24 via the transmission unit 23, and outputs an electromagnetic wave from the transmission antenna 24 of the scanner A. This electromagnetic wave is received by the transmitting / receiving antenna 44 of the data carrier B, and the identification data included in the received signal received via the receiving unit 25 is stored in the IC chip 42.

Further, the IC of the data carrier B is transmitted by communication.
When reading the identification data held in the chip 42, the control unit 4 of the scanner A sends a transmission signal including the question data to the transmission antenna 24 via the transmission unit 23,
An electromagnetic wave is output from the transmitting antenna 24 of the scanner A, the electromagnetic wave is received by the transmitting / receiving antenna 44 of the data carrier B, and the identification data is transmitted to the IC chip 42 according to the question data included in the received signal received via the receiving unit 45. The transmission signal including the identification data extracted through the transmission unit 43 is sent to the transmission / reception antenna 44, output as an electromagnetic wave from the transmission / reception antenna 44, and the electromagnetic wave is received by the reception antenna 26 of the scanner A. The identification data included in the reception signal received via the control unit 4 is sent to the control unit 4. Thereafter, the identification data is arbitrarily processed, for example, sent to a personal computer or the like.

During the communication as described above, the control means 4 of the scanner A measures the intensity of the electromagnetic wave and determines whether or not the communication with the data carrier B is performed well. Setting and displaying means 9 and external device 8
Output to

[0054]

As described above, according to the first aspect of the present invention, there is provided a non-contact identification data communication scanner for reading and writing identification data by performing communication by electromagnetic waves with respect to a data carrier holding identification data. Since the communication frequency can be set freely to a frequency different from the noise, the communication frequency can be set to a different frequency from the noise so that the noise does not interfere with the communication with the scanner. You can do it.

In the invention according to claim 2 of the present invention, the transmission frequency can be set freely by operating the transmission frequency setting dial, so that the desired transmission frequency can be set with a simple configuration by rotating the transmission frequency setting dial. Is what you can do.

In the invention according to claim 3 of the present invention, the transmission frequency can be set freely by operating the reception frequency setting dial, so that the desired reception frequency can be set with a simple configuration by rotating the reception frequency setting dial. Is what you can do.

In the invention according to claim 4 of the present invention, the transmission frequency can be set freely by operating the transmission frequency setting switch, so that the desired transmission frequency can be set with a simple configuration by switching the transmission frequency setting switch. Is what you can do.

In the invention according to claim 5 of the present invention, the transmission frequency can be set freely by operating the reception frequency setting switch, so that the desired reception frequency can be set with a simple configuration by switching the reception frequency setting switch. Is what you can do.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of an embodiment of the present invention.

FIG. 2A is a perspective view illustrating an example of a scanner, and FIG.
Is a partial perspective view.

FIG. 3 is a block diagram of the scanner according to the first embodiment;

FIG. 4 is a schematic diagram of a circuit of the scanner according to the first embodiment;

FIG. 5 is a partial side view showing an example of another embodiment of the scanner of the above.

FIG. 6 is a perspective view showing an example of another embodiment of the scanner of the above.

FIG. 7 is a perspective view showing an example of another embodiment of the scanner of the above.

FIG. 8 is a block diagram of a data carrier according to the embodiment.

FIG. 9 is a schematic diagram of a circuit of the data carrier of the above.

FIG. 10 is a perspective view showing another example of the above data carrier.

FIG. 11A is a perspective view showing another example of the data carrier of the above, and FIG. 11B is a partial plan view.

FIG. 12 is a schematic diagram of a circuit of the data carrier of the above.

[Explanation of symbols]

 41a Transmission frequency setting dial 41b Receiving frequency setting dial 61a Transmission frequency setting switch 61b Receiving frequency setting switch A Scanner B Data carrier

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tomoki Takazoe 1048 Kazuma Kadoma, Kadoma-shi, Osaka F-term in Matsushita Electric Works, Ltd. (Reference) 5B035 AA11 BB09 BC04 CA23

Claims (5)

[Claims] 1. A non-contact identification data communication data carrier in which identification data is read and written from a scanner by performing communication using electromagnetic waves, wherein a communication frequency different from noise is set to be freely set. Data carrier for contactless identification data communication. 2. The data carrier for contactless identification data communication according to claim 1, wherein the transmission frequency can be set freely by operating a transmission frequency setting dial. 3. The data carrier for contactless identification data communication according to claim 1, wherein a reception frequency can be set freely by operating a reception frequency setting dial. 4. The data carrier for contactless identification data communication according to claim 1, wherein the transmission frequency can be set freely by operating a transmission frequency setting switch. 5. The data carrier for contactless identification data communication according to claim 1, wherein a reception frequency can be set freely by operating a reception frequency setting switch.