JP2002074278A - Wireless information processor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wireless information processor capable of quickly discovering the deterioration of performance or the like by making the change of the transmission output level of a transmission antenna always detectable. SOLUTION: This wireless tag reader/writer 200 for performing a prescribed information processing by performing wireless transmission and reception with a wireless tag 100 attached to an article on a belt conveyer or the like is provided with an output level detecting circuit 240 for detecting the transmission output level of a transmission antenna 250. The transmission output level detected by the output level detecting circuit 240 is transmitted to a data processing circuit 210, and whether or not the detected transmission output level is within a normal value is judged, and when this is beyond the normal value, the transmission output level is adjusted via a transmission driver 230 to a normal value by an output adjusting circuit 290, and a warning signal is transmitted to a control computer 300 since it is judged that a transmitting system is abnormal, and a staff is informed of the situation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a method of performing wireless transmission / reception with a wireless communication medium such as a batteryless wireless tag attached to an article on a belt conveyor in physical distribution management. The present invention relates to a wireless information processing apparatus such as a wireless tag reader / writer that performs predetermined information processing such as transmission of power and transmission and reception of data to a wireless tag.

[0002]

2. Description of the Related Art Recently, for example, a wireless tag reader / writer for wirelessly communicating information with a wireless tag or a wireless card reader / writer for wirelessly communicating information with a wireless card has been used for distribution management, Access control,
It is used for systems such as personal authentication.

For example, in physical distribution management, a wireless tag recording destination information and history information is attached to an article on a belt conveyor, and wireless communication is performed with a wireless tag reader / writer installed near the belt conveyor. By
It is used in systems that automatically sort delivery destinations of goods and read and write histories.

[0004]

However, the above-mentioned wireless tags are mainly battery-less because of the elimination of battery replacement work, downsizing, cost reduction, and long life. Therefore, recent wireless tags perform information communication from radio waves transmitted from a wireless tag reader / writer and generate power required for the operation of the wireless tag. Therefore, wireless tag readers
The change in the output level of the transmission radio wave of the writer is greatly affected by the communicable area (distance) of the batteryless wireless tag.

However, in the conventional wireless tag reader / writer, the control computer cannot grasp the current state of the transmission output level decrease or fluctuation due to the disconnection of the transmission antenna or the service life of the component or the failure, so that the communication quality can be quickly reduced. Response is impossible.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a wireless information processing apparatus which can constantly detect a change in the transmission output level of a transmission antenna and can quickly detect performance degradation and the like.

Another object of the present invention is to provide a wireless information processing apparatus capable of quickly detecting and confirming the transmission / reception performance of the apparatus.

[0008]

According to the present invention, there is provided a wireless information processing apparatus for performing predetermined information processing by transmitting and receiving information wirelessly to and from an external wireless communication medium. A transmission antenna for transmitting a radio wave to a communication medium, a reception antenna for receiving a radio wave transmitted from the wireless communication medium, and communication between the wireless communication medium via the transmission antenna and the reception antenna. Wireless communication means for performing wireless transmission / reception, processing means for performing predetermined information processing based on the result of transmission / reception by the wireless communication means, output level detection means for detecting an output level of the transmission antenna, and output level detection means Abnormality detecting means for detecting the presence or absence of an abnormality based on the output level detected by the control unit.

In the wireless information processing apparatus according to the present invention, the output level detecting means detects an output level of the transmitting antenna in a signal path between the transmitting antenna and the wireless communication means. .

Further, in the wireless information processing apparatus according to the present invention, the output level detecting means detects an output level of the transmitting antenna based on a signal based on a radio wave transmitted from the transmitting antenna and received by the receiving antenna. Features.

Further, in the wireless information processing apparatus according to the present invention, the output level detecting means has an antenna for detecting an output level for receiving a transmission radio wave from the transmitting antenna, and the transmitting level is determined based on an output signal of the antenna. It is characterized in that the output level of the antenna is detected.

Further, in the wireless information processing apparatus according to the present invention, when the abnormality detecting means detects an abnormality, the output level of the transmitting antenna is adjusted according to the output level detected by the output level detecting means. Means are further provided.

Further, the wireless information processing apparatus according to the present invention further comprises abnormality notifying means for notifying the abnormality when the abnormality detecting means detects an abnormality.

A wireless information processing apparatus according to the present invention is a wireless information processing apparatus for performing predetermined information processing by transmitting and receiving information wirelessly to and from an external wireless communication medium. A transmitting antenna for transmitting a radio wave, a receiving antenna for receiving a radio wave transmitted from the wireless communication medium, and wirelessly transmitting and receiving between the wireless communication medium via the transmitting antenna and the receiving antenna. Wireless communication means for performing, a processing means for performing predetermined information processing based on a result of transmission and reception by the wireless communication means, and having the same configuration as the external wireless communication medium, capable of communicating with the transmission antenna and the reception antenna A wireless communication medium for detecting a communication abnormality provided at a location, and the external wireless communication via the transmission antenna and the reception antenna. And a communication abnormality detection means for detecting the presence or absence of communication abnormality by transmitting and receiving wireless between the signal medium and the wireless communication medium for communication error detection.

Further, in the wireless information processing apparatus according to the present invention, the communication abnormality detecting means transmits an identification information read command of the wireless communication medium via the transmission antenna, and receives the transmitted identification information read command. The presence or absence of a communication abnormality is determined by whether or not the identification information of the wireless communication medium for detecting the communication abnormality exists in the individual identification information transmitted from the external wireless communication medium and the wireless communication medium for detecting the communication abnormality. Is detected.

According to the present invention, by detecting the output level of the transmission antenna and detecting the presence or absence of an abnormality based on the detected output level, it is possible to constantly detect a change in the transmission output level of the transmission antenna. Deterioration and the like can be found quickly.

According to the present invention, a wireless communication medium for detecting a communication abnormality having the same configuration as an external wireless communication medium is provided.
By detecting the presence / absence of a communication abnormality by performing wireless transmission / reception between the wireless communication medium for detecting the communication abnormality and an external wireless communication medium, the transmission / reception performance of the device can be quickly detected and confirmed. Can be.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

First, a first embodiment will be described.

FIG. 1 shows a battery-less wireless tag 100 as a wireless communication medium according to a first embodiment, and a wireless tag reader / writer as a wireless information processing device for communicating with the wireless tag 100 wirelessly. FIG.

The wireless tag 100 is attached to, for example, an article on a belt conveyor, and has a transmitting / receiving antenna 110 for transmitting / receiving to / from a wireless tag reader / writer 200 and an antenna input / output controlling the transmitting / receiving antenna 110. An output circuit 120, a power generation unit 130 that generates a stabilized DC voltage by rectifying and smoothing the received power wave and supplies it to each circuit as an operation voltage, and a demodulation circuit 140 that performs demodulation processing on a received signal A data processing circuit 150 for performing various data processing, a memory 160 for storing various data, a modulation circuit 170 for performing modulation processing on transmission data, and a transmission driver 180 for performing transmission processing.

The wireless tag reader / writer 200 detects the transmission level on the transmission antenna side and notifies the data processing circuit of an abnormality such as disconnection of the transmission antenna or a decrease in the transmission level, thereby notifying the control computer side as an error message and A data processing circuit 210 for automatically adjusting the output level to a normal value and performing various data processing, a modulation circuit 220 for performing modulation processing on transmission data, a transmission driver 230 for driving a transmission antenna 250 described later, An output level detection circuit 240 as an output level detecting means for detecting an output level of a transmission antenna 250 described later, a transmission antenna 250 for transmitting a radio wave to the wireless tag 100, and receiving a radio wave transmitted from the wireless tag 100 Antenna 260 for receiving Antenna input circuit 270, a demodulation circuit 280 to receive signals performs demodulation processing of and,
The output level of the transmission antenna 250 is determined by the transmission driver 230.
And an output adjustment circuit 290 as output level adjustment means for adjusting the output level via the control circuit.

The data processing circuit 210 of the wireless tag reader / writer 200 is connected to a control computer 300 as a host device. Control computer 300
Is a personal computer that controls the wireless tag reader / writer 200.

The transmission driver 230 includes, for example, a variable DC power supply 231 and a variable DC power supply 2 as shown in FIG.
A switching element (transistor) 232 that is connected to the switching element 31 and that is turned on and off by an output signal of the modulation circuit 220, and a capacitor 23 that outputs a switching signal by the on and off operations of the switching element 232
3.

The variable DC power supply 231 is
The output voltage of the transmitting antenna 250 is adjusted to an optimum value by variably controlling the output voltage by changing the output voltage to 0.

The output level detection circuit 240 includes, for example,
It is configured as shown in FIG. 2 or FIG. 3, and either of them may be used. The output level detection circuit 240 of FIG.
This is based on a detection method using resistance. That is, a fixed resistor 241 is inserted and connected to a signal path between the transmission driver 230 and the transmission antenna 250, the voltage value at both ends of the resistor 241 is digitized by the A / D converter 242, and the output is used as a transmission output level. This is sent to the data processing circuit 210.

The output level detection circuit 240 of FIG. 3 uses a detection method using a coil. That is, the primary coil 243a of the transformer 243 is inserted and connected to the signal path between the transmission driver 230 and the transmission antenna 250, and the output voltage value of the secondary coil 243b of the transformer 243 is digitized by the A / D converter 242. , And sends the output to the data processing circuit 210 as a transmission output level.

Next, the operation of the wireless tag reader / writer 200 and the wireless tag 100 in such a configuration will be described. The data processing circuit 210 of the wireless tag reader / writer 200 generates a command and data for communicating with the wireless tag 100, and modulates a carrier using the modulation circuit 220 using these commands or data, thereby transmitting a transmission signal. Generate. The generated transmission signal is amplified by the transmission driver 230 and then transmitted from the transmission antenna 250 as a transmission radio wave. At this time, the transmission output level is detected by the output level detection circuit 240.

FIG. 4 shows the processing after the detection of the output level.
This will be described with reference to the flowchart shown in FIG. When the output level detection circuit 240 detects the transmission output level (S
1), the detected output level is the data processing circuit 21
Sent to 0. The data processing circuit 210 determines whether or not the detected output level is within a preset specified value (S2).

If the result of this determination is that the output level is within the specified value, the data processing circuit 210 ends this output level detection processing.
90, the variable DC power supply 231 of the transmission driver 230
Is variably controlled to adjust the transmission output level to a normal value (S3).

After the adjustment, the data processing circuit 210 determines whether or not the detected output level is within a predetermined value (S4). If the result of this determination is within the specified value, the data processing circuit 210 ends this output level detection processing, and if the value is outside the specified value (in the case of an abnormality), the transmission system (transmission driver 230, transmission antenna 250, etc.) ), A warning signal is sent to the control computer 300 to notify the attendant of the fact (S5).

On the other hand, when the wireless tag 100 approaches the transmitting antenna 250 of the wireless tag reader / writer 200,
Transmission / reception antenna 110 and antenna input / output circuit 120
Thus, the transmission radio wave from the wireless tag reader / writer 200 is received. The received transmission radio wave is transmitted to the power generation unit 130.
Rectified and smoothed, a power source is generated, and the wireless tag 1
00 is supplied to each circuit as power required for operation.

A transmission radio wave from the wireless tag reader / writer 200 received by the transmission / reception antenna 110 is transmitted to the data processing circuit 150 after being demodulated by the demodulation circuit 140. The data processing circuit 150 performs predetermined data processing using the memory 160 based on the received data,
The processing result is sent to modulation circuit 170 as transmission data. Modulation circuit 170 generates a transmission signal by modulating the transmission data from data processing circuit 150.
After the generated transmission signal is amplified by the transmission driver 180, it is transmitted as a transmission radio wave from the transmission / reception antenna 110 via the antenna input / output circuit 120.

The transmission radio wave transmitted from the wireless tag 100 is transmitted to the receiving antenna 26 of the wireless tag reader / writer 200.
The signal is received by the antenna input circuit 270, passes only necessary radio waves by the antenna input circuit 270, is demodulated by the demodulation circuit 280, and is transmitted to the data processing circuit 210. Data processing circuit 210
Performs predetermined data processing based on the received data.

As described above, according to the first embodiment,
By detecting the transmission output level of the transmission antenna and detecting the presence or absence of an abnormality based on the detected transmission output level, it is possible to constantly detect a change in the transmission output level of the transmission antenna, and to quickly detect performance degradation and the like. be able to.

Also, by providing a transmission output level detection function on the transmission antenna side, if there is something that blocks electromagnetic waves around the wireless tag reader / writer, the detection of the transmission output level can be detected most accurately. Is possible.

Next, a second embodiment will be described.

FIG. 5 shows a configuration of a wireless tag reader / writer 200 as a wireless information processing apparatus according to the second embodiment. The difference between the second embodiment and the first embodiment is that the transmission output level is detected from the transmission antenna system in the first embodiment, whereas the transmission output level is detected in the second embodiment. The point is that the level detection is performed by the receiving antenna system, and the other points are the same as those in the first embodiment.

In FIG. 5, a transmission output detection circuit 310 as output level detection means for detecting the output level of the transmission antenna 250 is connected to the antenna input circuit 270. The output of the transmission output detection circuit 310 is a data processing circuit. Sent to 210.

The operation of the main part in such a configuration will be described. The transmission radio wave transmitted from the radio tag 100 is received by the reception antenna 260 of the radio tag reader / writer 200, passes only a necessary radio wave by the antenna input circuit 270, is demodulated by the demodulation circuit 280, and then transmitted to the data processing circuit 210. Sent. Data processing circuit 210 performs predetermined data processing based on the received data.

Here, the transmission radio wave from transmission antenna 250 is a transmission radio wave for communication with wireless tag 100, but is also received by reception antenna 260. Therefore, the transmission output detection circuit 310
The output level of the transmission antenna 250 is detected based on a reception signal obtained from the transmission antenna 250 and transmitted by the transmission antenna 250. The detected output level is stored in the data processing circuit 21.
0, and as in the case of FIG.
It is determined whether or not the transmission output level from is normal.

In this case, as an example of the configuration position of the transmission / reception antenna, for example, as shown in FIG. 6A, it is conceivable that a reception antenna 260 is arranged at the center of the transmission antenna 250. FIG. 6B shows a communicable area in the case where the transmitting / receiving antenna is configured as described above.

As described above, according to the second embodiment,
By detecting the transmission output level of the transmission antenna and detecting the presence or absence of an abnormality based on the detected transmission output level, it is possible to constantly detect a change in the transmission output level of the transmission antenna, and to quickly detect performance degradation and the like. be able to.

When the transmission output level is detected by the transmission antenna system, parts having a high withstand voltage are used.
Although there are drawbacks such as being likely to cause a failure and a short product life, providing the transmission output level detection function on the receiving antenna side as in the second embodiment avoids the above problem. You.

Next, a third embodiment will be described.

FIG. 7 shows the configuration of a wireless tag reader / writer 200 as a wireless information processing apparatus according to the third embodiment. The third embodiment is different from the second embodiment in that the transmission output level is detected from the receiving antenna system in the second embodiment, whereas the transmission output level is detected in the third embodiment. The point is that the detection of the level is performed by a dedicated receiving antenna, and the other points are the same as those of the second embodiment.

In FIG. 7, a transmission output level detection antenna 311 is a reception antenna dedicated to transmission output level detection provided separately from transmission / reception antennas 250 and 260 for communicating with wireless tag 100. 311 is connected to the transmission output detection circuit 310,
The output of the transmission output detection circuit 310 is the data processing circuit 2
Sent to 10.

The operation of the main part in such a configuration will be described. A transmission radio wave from the transmission antenna 250 is received by a transmission output level detection antenna 311 other than the transmission / reception antenna that communicates with the wireless tag 100, and a transmission output level of the transmission antenna 250 is detected by a transmission output detection circuit 310 based on the received signal. Is sent to the data processing circuit 210 to determine whether or not the transmission output level from the transmission antenna 250 is normal, as in the case of FIG.

By the way, in order to expand the communicable area,
When the transmission radio wave from the transmission antenna goes around to the reception antenna side, the radio tag reader / writer is an unnecessary radio wave for the reception antenna, and becomes a noise for a weak transmission radio wave from the radio tag. Therefore, there is a case where both antenna arrangement and shape are devised so that the transmission antenna and the reception antenna do not interfere with each other, and the transmission output level detection antenna 311 is effective at the time of such a wireless tag reader / writer. .

As an example, the interference removing and transmitting antenna shown in FIG. 8 will be described.

FIG. 8A shows an arrangement and connection diagram of the transmitting and receiving antennas, and FIG. 8B shows an equivalent circuit thereof. A second antenna 2602 constituting the receiving antenna 260 is disposed substantially at the center of the loop-shaped transmitting antenna 250, and the receiving antenna 260 is provided in a gap between the second receiving antenna 2602 and the transmitting antenna 250. The first receiving antenna 2601 to be configured is provided.

Induced currents I2602-250 and I2601-250 induced in the second and first antennas 2602 and 2601 flow by the transmission radio wave transmitted from the transmission antenna 250.
Here, one end C of the second antenna 2602 and one end E of the first antenna 2601 are generated in such a manner that induced currents induced in the second and first antennas 2602 and 2601 cancel each other.
And are differentially connected. Thereby, the second antenna 260
IDF = [I2602-250] − [I2601-250] ≒ 0 between the other end D of the second antenna D and the other end F of the first antenna 2601, and interference from the transmitting antenna 250 can be reduced.

FIG. 9A shows the configuration of a transmitting / receiving antenna, and FIG. 9B shows a communicable area in that case.

In the present embodiment, as shown in FIG. 10A, a transmission output level detection antenna 311 is provided at a place where transmission radio waves can be received from transmission antenna 250, for example, near transmission antenna 250. I have. FIG.
0 (b) indicates a communicable area in that case.

As described above, according to the third embodiment,
By detecting the transmission output level of the transmission antenna and detecting the presence or absence of an abnormality based on the detected transmission output level, it is possible to constantly detect a change in the transmission output level of the transmission antenna, and to quickly detect performance degradation and the like. be able to.

Also, in order to expand the communicable area, the radio tag reader / writer is a radio wave unnecessary for the receiving antenna when the radio wave transmitted from the transmitting antenna goes to the receiving antenna side. Noise. For this reason, the antenna arrangement and shape of the transmitting antenna and the receiving antenna may be devised so as not to interfere with each other. In such a case, it becomes difficult to detect the transmission output level in the receiving antenna system. Therefore, by providing a reception antenna and a transmission output detection circuit dedicated to transmission output level detection in addition to the transmission and reception antennas that communicate with the wireless tag, the transmission output level can be detected.

Next, a fourth embodiment will be described.

FIG. 11 shows the configuration of a wireless tag reader / writer 200 as a wireless information processing apparatus according to the fourth embodiment. The difference between the fourth embodiment and the first embodiment is that the output level detection circuit 240 and the output adjustment circuit 290 are eliminated, and the wireless tag 101 for communication abnormality detection is always incorporated instead. The rest is the same as in the first embodiment.

The wireless tag 101 for detecting a communication abnormality has the same configuration as that of the external wireless tag 100 and is installed at a place where communication with the transmitting antenna 250 and the receiving antenna 260 is possible.

In this embodiment, it is assumed that the wireless tag reader / writer 200 can communicate simultaneously with a plurality of wireless tags.

FIG. 12 shows a wireless tag 10 for detecting a communication error.
1 shows an installation example. Normally, a wireless tag 100 that performs communication
The antenna unit 3 in which the transmitting and receiving antennas 250 and 260 are housed so that they can be unconsciously seen from the outside.
The wireless tag 101 for communication abnormality detection is located inside the wireless communication device 12 and at a position where communication with the transmitting / receiving antennas 250 and 260 can be performed.
Is installed.

Note that the inclination of the wireless tag capable of communicating with the transmitting / receiving antennas 250 and 260 is represented by the transmitting / receiving antenna 2
Wireless tag 1 for detecting communication abnormality in parallel with the planes 50 and 260
It is also effective to arrange 01.

The operation of the main part in such a configuration is shown in FIG.
This will be described with reference to the flowchart shown in FIG. In the wireless tag reader / writer 200, the data processing circuit 210
Generates an ID read command for reading an ID as identification information for identifying the wireless tag, and transmits the generated ID read command from the transmitting antenna 250 (S11).

Then, from the respective wireless tags 100 in the communicable area of the wireless tag reader / writer 200 and the wireless tag 101 for communication abnormality detection permanently provided in the wireless tag reader / writer 200, respective IDs are respectively obtained.
Is transmitted, and the data processing circuit 210 of the wireless tag reader / writer 200 receives (acquires) IDs from the wireless tags 100 and 101 via the receiving antenna 260 (S1).
2).

Here, the data processing circuit 210 checks whether or not the ID of the wireless tag 101 for detecting a communication abnormality exists in each ID acquired (received) from each wireless tag (S13). In this case, predetermined data read and write processing is performed on the wireless tag 100 of each ID except for the ID of the wireless tag 101 for communication abnormality detection from all the acquired IDs (S14).

If it is determined in step S13 that the ID of the wireless tag 101 for detecting a communication error does not exist,
Since there is an abnormality in the transmission system or the reception system of the wireless tag reader / writer 200, the data processing circuit 210 sends a warning signal of a communication abnormality to the control computer 300, and notifies a staff member of that (S15).

As described above, according to the fourth embodiment,
The transmission / reception performance of the wireless tag reader / writer can be quickly checked only by leaving one wireless tag for communication abnormality detection in the wireless tag reader / writer. Since there is almost no improvement in the circuit of the conventional wireless tag reader / writer, it is considered that the configuration is very simple and the effect is large.

In the above embodiment, the case where the present invention is applied to a wireless tag reader / writer that processes wireless tags has been described. However, the present invention is not limited to this.
For example, the wireless tag and the wireless card differ only in the appearance and shape, but have almost the same functions. Therefore, the wireless tag and the wireless card can be similarly applied to a wireless card reader / writer that processes a wireless card.

As described above in detail, according to the present invention, it is possible to provide a wireless information processing apparatus capable of constantly detecting a change in the transmission output level of a transmission antenna and quickly finding performance degradation and the like.

Further, according to the present invention, it is possible to provide a wireless information processing apparatus capable of quickly detecting and confirming the transmission / reception performance of the apparatus.

[Brief description of the drawings]

FIG. 1 is a block diagram schematically showing a configuration of a wireless tag and a wireless tag reader / writer according to a first embodiment.

FIG. 2 is a block diagram schematically showing a configuration of an output level detection circuit according to the first embodiment.

FIG. 3 is a block diagram schematically showing another configuration of the output level detection circuit according to the first embodiment.

FIG. 4 is a flowchart for explaining processing after detection of a transmission output level according to the first embodiment;

FIG. 5 is a block diagram schematically showing a configuration of a wireless tag reader / writer according to a second embodiment.

FIG. 6 is a diagram showing a configuration of a transmitting / receiving antenna and a communicable area according to a second embodiment.

FIG. 7 is a block diagram schematically showing a configuration of a wireless tag reader / writer according to a third embodiment.

FIG. 8 is a diagram illustrating an interference canceling transmission / reception antenna according to a fourth embodiment.

FIG. 9 is a diagram showing a configuration and a communicable area of an interference canceling transmission / reception antenna according to a third embodiment.

FIG. 10 is a diagram illustrating a configuration and a communicable area when a transmission output level detection antenna is added to the interference cancellation transmission / reception antenna according to the third embodiment.

FIG. 11 is a block diagram schematically showing a configuration of a wireless tag reader / writer according to a fourth embodiment.

FIG. 12 is a perspective view showing an example of installation of a wireless tag for communication abnormality detection according to a fourth embodiment.

FIG. 13 is a flowchart for explaining processing of a wireless tag reader / writer according to a fourth embodiment;

[Explanation of symbols]

100: Wireless tag (wireless communication medium) 101: Wireless tag (wireless communication medium) for detecting communication abnormality 110: Transmission / reception antenna 120: Antenna input / output circuit 130: Power generation unit 140: Demodulation circuit 150: … Data processing circuit 160… memory 170… modulation circuit 180… transmission driver 200… wireless tag reader / writer (wireless information processing device) 210… data processing circuit 220… modulation circuit 230… transmission driver 240… ... output level detection circuit (output level detection means) 250 ... transmission antenna 260 ... reception antenna 2601 ... first antenna 2602 ... second antenna 270 ... ... antenna input circuit 280 ... ... demodulation circuit 290 ... output Adjustment circuit 300 Control computer 310 Transmission output detection circuit (output level detection circuit) Means) 311 ...... transmission output level detection antenna 312 ...... antenna unit

Claims (8)

[Claims] 1. A wireless information processing apparatus for performing predetermined information processing by wirelessly transmitting and receiving information to and from an external wireless communication medium, wherein: a transmission antenna for transmitting a radio wave to said wireless communication medium A receiving antenna for receiving a radio wave transmitted from the wireless communication medium; a wireless communication unit for performing wireless transmission and reception with the wireless communication medium via the transmitting antenna and the receiving antenna; Processing means for performing predetermined information processing based on the result of transmission and reception by the means; output level detection means for detecting the output level of the transmitting antenna; and detection of the presence or absence of an abnormality based on the output level detected by the output level detection means A wireless information processing apparatus comprising: 2. The wireless information processing apparatus according to claim 1, wherein said output level detection means detects an output level of said transmission antenna in a signal path between said transmission antenna and said wireless communication means. . 3. The wireless device according to claim 1, wherein said output level detecting means detects an output level of said transmitting antenna based on a signal of a transmitting radio wave from said transmitting antenna received by said receiving antenna. Information processing device. 4. The output level detecting means includes an antenna for detecting an output level for receiving a transmission radio wave from the transmission antenna, and detecting an output level of the transmission antenna based on an output signal of the antenna. The wireless information processing apparatus according to claim 1, wherein: 5. When the abnormality detecting means detects an abnormality,
2. The wireless information processing apparatus according to claim 1, further comprising an output level adjusting unit that adjusts an output level of the transmitting antenna according to the output level detected by the output level detecting unit. 6. When the abnormality detecting means detects an abnormality,
2. The wireless information processing apparatus according to claim 1, further comprising abnormality notification means for notifying the user. 7. A wireless information processing apparatus for performing predetermined information processing by wirelessly transmitting and receiving information to and from an external wireless communication medium, comprising: a transmission antenna for transmitting a radio wave to said wireless communication medium. A receiving antenna for receiving a radio wave transmitted from the wireless communication medium; a wireless communication unit for performing wireless transmission and reception with the wireless communication medium via the transmitting antenna and the receiving antenna; Processing means for performing predetermined information processing based on the result of transmission / reception by the means; and a communication abnormality detecting unit which is configured identically to the external wireless communication medium and is provided at a location where the transmitting antenna and the receiving antenna can communicate. And the external wireless communication medium and the communication abnormality detection via the transmission antenna and the reception antenna. A communication abnormality detecting means for detecting the presence or absence of a communication abnormality by performing wireless transmission / reception with a wireless communication medium for communication. 8. The communication abnormality detecting means transmits an identification information read command of the wireless communication medium via the transmission antenna, and receives the transmitted identification information read command and the external wireless communication medium and the communication. The presence or absence of a communication abnormality is detected based on whether or not the identification information of the wireless communication medium for communication abnormality detection exists in individual identification information transmitted from the wireless communication medium for abnormality detection. Item 8. The wireless information processing device according to Item 7.