JP2006308551A - Wireless dosimeter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate the management of a dosimeter inside a radiation-controlled area without making the facility cost high. <P>SOLUTION: When a user acquires and retains ID information, showing an ID card to an entrance and exit management device 3, the wireless dosimeter 2 is started by any one of electromagnetic induction, infrared communication, and ultrasonic communication. The started dosimeter 2 receives and retains the ID information from the entrance and exit management device 3. The interference of radio waves is inhibited in the wireless dosimeter 2 by starting any one of electromagnetic induction, infrared communication, the ultrasonic communication. Only the wireless dosimeter 2, which the user who shows the ID card in front of the entrance and exit management device 3 possesses, is started. The wireless dosimeter 2 is made to stored this ID information of the user. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a radio dosimeter that communicates radiation dose measurement data and the like wirelessly when entering or leaving a radiation control area of a nuclear facility or a specific place in the control area.

Conventionally, when entering a radiation control area, dosimeter numbers, doses and access time alarm values, etc. are also displayed between the dosimeter and the access control device, and the dosimeter is also used for the exit time from the control area. A device that wirelessly communicates numbers and dosimeter measurement data is known.
In addition, it is known to communicate radiation dose measurement data and the like wirelessly even when working in a radiation control area. The communication with the entrance / exit management device needs to be limited to the dosimeter possessed by the person entering / exiting. For this purpose, the entrance / exit management device reads the identification information of the person in contact or non-contact manner with the card possessed by the person and writes the identification information in the dosimeter.

The entrance / exit control device calls the dosimeter that can respond in a limited form, writes the previous identification information to the responding dosimeter, reads the dosimeter number of the dosimeter, and enters the dosimeter and the entrance / exit control device The system monitoring device connected to these points associates the dosimeter number with the person identification information.
Or, dosimeters by limiting the number of dosimeters that respond to wireless calls from the entrance / exit area management device by pressing the start button provided on the dosimeter in front of the entrance / exit area management device. The dosimeter number is associated with the person identification information. Alternatively, the dosimeter number is associated with the person identification information by inputting the dosimeter number by the person.

As this type of technology, as described in Patent Document 1, when renting a dosimeter with a dosimeter lending device, the ID (Identification) card is placed over the dosimeter lending device, etc. It is read by the meter lending device, and this identification information is written in the dosimeter. When lending this dosimeter, a method of associating a dosimeter number with human identification information in advance before the entrance / exit management device has also been proposed.
In addition, Patent Documents 2 and 3 have also been proposed as similar techniques.

JP 2002-286845 A JP 2003-98253 A JP-A-2005-233806

  By the way, in the conventional wireless dosimeter, when associating the dosimeter number of the dosimeter with the ID information of the owner, the ID information is written in the dosimeter by radio by the communication device within the limited area. The dosimeter is called wirelessly from the management device, and ID information is written to the responding dosimeter. At this time, in order not to respond from a plurality of dosimeters, the transmission output is suppressed in order to make the communication area extremely narrow so that communication is possible only within a range of about 50 cm, for example.

  However, radio waves cause radio wave interference, so it is not always possible to communicate with the subject's dosimeters that exist in front of the entrance / exit control device, and the dosimeters of those in the vicinity of the subject respond. As a result, there is a problem that the ID information of the subject is written in the dosimeter of the neighbor. For this reason, when communicating with a communication device for writing ID information in the management area, since the communication area is narrow, as in the case of communication with the entrance / exit management device, the communication is not made at a position very close to the communication device. I can't. Also, with the method of pushing the operation button or holding the dosimeter, it takes time to take out the dosimeter from the pocket of the protective clothing, etc., and it takes time to operate the button. It takes extra time. In other words, there is a problem that the dosimeter cannot be easily managed in the radiation control area.

In the method of associating in advance with the dosimeter lending device disclosed in Patent Document 1, such a dosimeter lending device is required as a new facility, and there is a problem that the equipment cost increases.
This invention is made in view of such a subject, and provides the radio | wireless dosimeter which can perform the management of the dosimeter in a radiation control area easily, without making an installation cost high. It is an object.

  To achieve the above object, a wireless dosimeter according to claim 1 of the present invention acquires and stores personal identification information by communicating with an entrance / exit management device that manages entrance / exit into a radiation control area. In the wireless dosimeter that measures the exposure dose in the radiation control area after this storage and wirelessly transmits the measurement value to the monitoring device via the communication device, the electromagnetic radiation signal by electromagnetic induction from the entrance / exit control device And a means for activating the wireless means in a state where wireless communication can be performed when the wireless communication is received.

  According to this configuration, since the wireless means of the wireless dosimeter is activated by electromagnetic induction, there is no interference like a radio wave, thereby allowing users in the electromagnetic radiation portion of the entrance / exit management device Only the wireless dosimeter possessed by can be activated, and the identification information of the user can be stored in this wireless dosimeter. Therefore, the conventional radio dosimeter of the person in the vicinity of the person to be moved in / out responds due to radio wave interference as in the prior art, and the problem that the identification information of the object person is written in this dosimeter is eliminated. In addition, since it can be activated by electromagnetic induction even with a wireless dosimeter placed in a protective clothing pocket, etc., there is no need to take out the dosimeter from a pocket or the like as in the past, and troublesome button operation. There is no need to spend extra time due to incorrect operations such as pressing the wrong button. For this reason, it is possible to easily manage the wireless dosimeter in the radiation control area.

A radio dosimeter according to claim 2 of the present invention is the radio dosimeter according to claim 1, wherein the identification signal of the entrance / exit area management device is included in the electromagnetic radiation signal from the entrance / exit area management device. A means for recognizing the code signal is provided.
According to this structure, when the corresponding entrance / exit management device identification code is included in the electromagnetic radiation from the entrance / exit management device, by recognizing the code, a plurality of entrance / exit management devices are arranged. Even at the place, it is possible to correlate the identification information of the user with the identification code of the radio dosimeter.

  The wireless dosimeter according to claim 3 of the present invention acquires and stores personal identification information through communication with an entrance / exit management device that manages entrance / exit into the radiation control area, and after this storage, the radiation dosimeter is stored. In a wireless dosimeter that measures the exposure dose in the management area and wirelessly transmits the measurement value to the monitoring device via the communication device, when the infrared signal is received from the entrance / exit management device, the wireless means communicates wirelessly. Means is provided for starting to a ready state.

  According to this configuration, since the wireless means of the wireless dosimeter is activated by receiving the infrared signal, there is no interference like a radio wave, thereby being in the electromagnetic radiation part of the entrance / exit management device Only the wireless dosimeter possessed by the user can be activated, and the identification information of the user can be stored in this wireless dosimeter. Therefore, the conventional radio dosimeter of the person in the vicinity of the person to be moved in / out responds due to radio wave interference as in the prior art, and the problem that the identification information of the object person is written in this dosimeter is eliminated. In addition, there is no need for troublesome button operation of the dosimeter as in the prior art, and no extra time is required due to erroneous operations such as incorrect button presses. For this reason, it is possible to easily manage the wireless dosimeter in the radiation control area.

The wireless dosimeter according to claim 4 of the present invention is the wireless dosimeter according to claim 3, wherein the identification code signal of the entrance / exit area management device is included in the infrared signal from the entrance / exit area management device. A means for recognizing a signal is provided.
According to this configuration, when the corresponding entrance / exit management device identification code is included in the infrared signal from the entrance / exit management device, a plurality of entrance / exit management devices are arranged by recognizing the code. Even at the place, it is possible to correlate the identification information of the user with the identification code of the radio dosimeter.

  The wireless dosimeter according to claim 5 of the present invention acquires and stores personal identification information through communication with an entrance / exit management device that manages entrance / exit into the radiation control area, and after this storage, the radiation dosimeter is stored. In a wireless dosimeter that measures the exposure dose in the management area and wirelessly transmits the measurement value to the monitoring device via the communication device, the wireless means is wireless when the ultrasonic signal is received from the entrance / exit management device. It is characterized by comprising means for starting up in a communicable state.

  According to this configuration, since the wireless means of the wireless dosimeter is activated by reception of the ultrasonic signal, there is no interference like a radio wave, thereby preventing the electromagnetic radiation part of the entrance / exit management device. Only a wireless dosimeter possessed by a user can be activated, and the identification information of the user can be stored in this wireless dosimeter. Therefore, the conventional radio dosimeter of the person in the vicinity of the person to be moved in / out responds due to radio wave interference as in the prior art, and the problem that the identification information of the object person is written in this dosimeter is eliminated. In addition, there is no need for troublesome button operation of the dosimeter as in the prior art, and no extra time is required due to erroneous operations such as incorrect button presses. For this reason, it is possible to easily manage the wireless dosimeter in the radiation control area.

The radio dosimeter according to claim 6 of the present invention is the radio dosimeter according to claim 5, wherein the identification signal of the entrance / exit area management device is included in the ultrasonic signal from the entrance / exit area management device. A means for recognizing the code signal is provided.
According to this structure, when the corresponding entrance / exit management device identification code is included in the ultrasonic signal from the entrance / exit management device, a plurality of entrance / exit management devices are arranged by recognizing the code. It is possible to correlate the identification information of the user and the identification code of the radio dosimeter even in any place.

  A radio dosimeter according to claim 7 of the present invention is the radio dosimeter according to any one of claims 1 to 6, wherein the radio means performs radio communication and a metal wiring pattern is mounted on a printed circuit board. In addition, a lumped constant component for matching the antenna frequency at a desired frequency is formed by connecting to the metal wiring pattern and mounted, and the printed circuit board on which the wireless antenna is formed is formed of a radio wave transmitting material. It is characterized by being housed in a case.

  According to this configuration, since the size of the wireless antenna can be reduced, the antenna case that accommodates the wireless antenna can be small. Usually, the radio dosimeter main body is a metal casing, and a radio antenna is protruded from the casing and accommodated in an antenna case capable of transmitting radio waves, and this case is integrated with the main body. Therefore, if the antenna case is small, the entire radio dosimeter can be reduced accordingly.

  A wireless dosimeter according to claim 8 of the present invention is the wireless dosimeter according to claim 1 or 2, wherein the wireless means performs wireless communication, a metal wiring pattern is mounted on a printed circuit board, and the antenna frequency is set. A lumped constant component for matching at a desired frequency is formed by connecting to the metal wiring pattern and mounted, and an electromagnetic induction receiving antenna for receiving an electromagnetic radiation signal on the printed circuit board is formed with a coil. It is formed by connecting and mounting a capacitor with a metal wiring pattern, and the printed circuit board on which these radio antenna and electromagnetic induction receiving antenna are formed is housed in a case made of a radio wave transmitting material. To do.

  According to this configuration, since the size of the wireless antenna can be made smaller than before, when an antenna case having the same volume as the conventional case is assumed, an empty space corresponding to the reduced size of the wireless antenna is provided in the antenna case. It is possible to install an electromagnetic induction receiving antenna in this space. From this, it is possible to form a wireless antenna and an electromagnetic induction receiving antenna on the same printed circuit board as in the present invention and accommodate them in the antenna case, so that the size of the conventional antenna case is increased. In addition, an electromagnetic induction receiving antenna can also be accommodated.

A wireless dosimeter according to claim 9 of the present invention is the radio dosimeter according to claim 8, wherein the radio dosimeter is switched on the printed circuit board so that one of the radio antenna and the electromagnetic induction receiving antenna is in an operating state. A changeover switch is provided between the radio antenna and the electromagnetic induction receiving antenna, and before receiving the electromagnetic radiation signal, the changeover switch is set so that only the electromagnetic induction receiving antenna is in an operating state. Control means for controlling the switching so that when the electromagnetic radiation signal is received by the electromagnetic induction receiving antenna in this operating state, the switching switch is controlled so that only the wireless antenna is in the operating state. It is characterized by.
According to this configuration, when entering the radiation control area, it is ensured that only the electromagnetic radiation signal is received by the electromagnetic induction receiving antenna, and after this reception, that is, after entering the radiation control area, it is ensured that only the radio antenna is used for radio transmission. Can communicate.

A radio dosimeter according to claim 10 of the present invention is the radio dosimeter according to claim 8 or 9, wherein the electromagnetic induction receiving antenna receives a frequency signal of LF band or HF band, and the radio antenna receives VHF band or UHF. A frequency signal of a band is received.
According to this configuration, erroneous communication is eliminated because the communication frequency band of each antenna is different.

  As described above, according to the present invention, there is an effect that the management of the dosimeter in the radiation management area can be easily performed without increasing the equipment cost. In addition, since the size of the wireless antenna can be reduced, the antenna case can be reduced in size even if the antenna for antenna and the electromagnetic induction receiving antenna are accommodated in the antenna case. There is an effect that the size of the meter can be reduced.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, parts corresponding to each other in all the drawings in this specification are denoted by the same reference numerals, and description of the overlapping parts will be omitted as appropriate.
(First embodiment)
FIG. 1 is an external view of a charging lending apparatus and an entrance / exit area management apparatus that house a wireless dosimeter according to the first embodiment of the present invention. 1 shows the internal configuration of the wireless dosimeter 2 shown in FIG. 1, and FIG. 3 shows the external configuration of the entrance / exit area management device 3. As shown in FIG.
A charging / lending device 1 shown in FIG. 1 is for storing and charging a large number of wireless dosimeters 2.

  As shown in FIG. 2, the radio dosimeter 2 includes an antenna 2-1, an RF (Radio Frequency) unit 2-2 that transmits / receives a radio signal, and a CPU 2-3 that controls the entire radio dosimeter. A memory unit 2-4 for storing information such as a dosimeter number, person identification information, and a measurement value of exposure dose, a measurement unit 2-5 for measuring the exposure dose, a buzzer, an LED (Light emitting diode), etc. A notification unit 2-6 that outputs sound and light, and an electromagnetic induction circuit 2-7 that transmits an activation signal by electromagnetic radiation of electromagnetic induction are provided. The electromagnetic induction circuit 2-7 is an infrared circuit that transmits an activation signal using infrared rays in the case of an infrared method, and an ultrasonic circuit that transmits an activation signal using ultrasonic waves in the case of an ultrasonic method.

  As shown in FIG. 3, the entrance / exit management device 3 is provided with a display device 3-1 for displaying information, an operation switch 3-2, a human ID card, and an ID card reading for reading human identification information. It comprises a section 3-3, an antenna 3-4 for transmitting and receiving radio signals, and an electromagnetic induction section 3-5 for sending an activation signal. The electromagnetic induction unit 3-5 is an infrared circuit that transmits an activation signal using infrared rays in the case of an infrared method, and an ultrasonic circuit that transmits an activation signal using ultrasonic waves in the case of an ultrasonic method.

  As shown in FIG. 4, this entrance / exit management device 3 is connected to a system monitoring device 6 through a communication network 5 together with a wireless transmission / reception device 4 arranged in the radiation management area 10. Thereby, a radiation management system is constructed. The wireless transmission / reception device 4 transmits and receives signals to and from the wireless dosimeter 2 by wireless communication. The entrance / exit management device 3 may be a stand-alone device installed alone.

Next, the management processing operation of the wireless dosimeter 2 in the radiation management system shown in FIG. 4 will be described with reference to the sequence diagram shown in FIG.
The wireless dosimeter 2 holds information of only the dosimeter number (dosimeter identification code) when stored in the charging and lending device 1. That is, information other than the dosimeter number is not held and is in a standby state. Then, when the wireless dosimeter 2 is taken out from the charging / lending device 1, it enters a start-up waiting state (S2-1).

  On the other hand, in the entrance / exit management device 3, when an ID card owned by a person is presented to the ID card reading unit 3-3, identification information (ID information) in the ID card is read and the ID information is held ( S3-1). Next, the entrance / exit area management device 3 activates the electromagnetic induction unit 3-5 and transmits an activation signal by electromagnetic radiation in order to call the nearby wireless dosimeter 2 (S3-2). The activation signal is an infrared signal in the case of an infrared system, and an ultrasonic signal in the case of an ultrasonic wave.

Furthermore, the activation signal may be a simple carrier signal that does not include data, or may be a signal A that includes an entry / exit management device identification code a2 as shown in FIG. The signal A includes a synchronization signal a1 and an error detection code a3, but may be an error correction code instead of the error detection code a3, and the code itself may be omitted. .
The wireless dosimeter 2 that has received the activation signal wirelessly transmits the signal B carrying the dosimeter identification code b1 shown in FIG. 6B of the wireless dosimeter itself to the entrance / exit management device 3 (S2). -2). The signal B is composed of the synchronization signal a1, the transmission source dosimeter identification code b1, the transmission destination entrance / exit management device identification code a2, and the error detection code a3, but the error B instead of the error detection code a3. A correction code may be used, and the code itself may be omitted.

  The entrance / exit area management device 3 that has received the signal B, which is a message addressed to the entrance / exit management device, retains the dosimeter identification code b1 (S3-3) and has already read and retained it as shown in FIG. 6 (c). The signal C carrying the human ID information c1 is wirelessly transmitted to the corresponding wireless dosimeter 2 (S3-4). The signal C is composed of the synchronization signal a1, the transmission / reception area management device identification code a2, the transmission dosimeter identification code b1, the ID information c1, and the error detection code a3, but the error detection code a3. Instead of the error correction code, the code itself may be omitted.

  The radio dosimeter 2 receives this signal C from the entrance / exit management device 3, stores the ID information c1 of the owner of the radio dosimeter 2 in the internal memory unit 2-4 (S2-3), This response is wirelessly transmitted to the entry / exit management device 3 (S2-4), and communication is terminated (S2-5). The end of communication may be ended by receiving end communication from the entry / exit management device 3 in addition to the method of end communication in this example. Moreover, although transmission in steps S2-2, S2-4, and S3-4 is wireless, any of electromagnetic induction, infrared rays, and ultrasonic waves may be used.

The entrance / exit management device 3 confirms the response in step S2-4 (S3-5), displays the information on the result on the display device 3-1, and transfers it to the system monitoring device 6 (S3-7). ). The display on the display device 3-1 and the transfer to the system monitoring device 6 may be performed after the end of communication as described above, or may be performed as appropriate for each communication.
Since the wireless dosimeter 2 that has completed the communication stores the user ID information c1, the wireless dosimeter 2 waits for wireless reception in this state (S2-6). In a system that does not perform communication in the radiation management area 10, the wireless dosimeter 2 is not on standby but is on standby.

On the other hand, when the wireless transmission / reception device 4 in the radiation management area 10 receives an instruction from the system management device 6 via the communication network 5 (S4-1), a request according to the instruction is addressed to the wireless dosimeter 2. (S4-2).
When the wireless dosimeter 2 receives a message addressed to itself, it transmits a response according to the instruction (S2-7). Then, it returns to the reception waiting state (S2-6). On the other hand, the wireless transmission / reception device 4 that has received the response from the wireless dosimeter 2 (S4-3) transmits the response content to the system monitoring device 6 (S4-4) and waits for an instruction from the system monitoring device 6. Return.

  In communication within the radiation management area 10, for example, communication in all areas of the radiation management area 10 is possible, and the wireless dosimeter 2 and the wireless transmission / reception device 4 perform communication while designating the other party. No communication with other wireless dosimeters. Thereafter, the wireless dosimeter 2 and the wireless transmission / reception device 4 repeat the operations of steps S2-6 to S2-7 and S4-1 to S4-4.

When the wireless dosimeter 2 is returned to the charging / lending device 1, information other than the dosimeter identification code b1 is erased and enters a standby state. Therefore, in step S2-1, the ID information c1 is stored. It is never recognized that
As described above, according to the wireless dosimeter of the first embodiment, the user tricks the ID card reading unit 3-3 of the entrance / exit management device 3 into the ID card reading unit 3-3 to acquire and hold the ID information c1. At this time, the wireless dosimeter 2 is activated by any one of electromagnetic induction, infrared communication, and ultrasonic communication, and ID information c1 is transmitted to the activated wireless dosimeter 2 from the entrance / exit management device 3 and held. I did it.

In other words, since the wireless dosimeter 2 is activated by any one of electromagnetic induction, infrared communication, and ultrasonic communication, there is no interference like radio waves, and thus, in front of the entrance / exit management device 3. Only the wireless dosimeter 2 possessed by the user who wears the ID card can be activated, and the ID information c1 of the user can be stored in the wireless dosimeter 2.
Therefore, the conventional radio dosimeter of the person in the vicinity of the entry / exit target responds due to radio wave interference, and the problem that the ID information of the target person is written in this dosimeter is eliminated.

In addition, since it can be activated by electromagnetic induction even with the wireless dosimeter 2 in the protective clothing pocket, etc., there is no need to take out the dosimeter from the pocket etc. Furthermore, it does not take extra time due to erroneous operations such as incorrect button presses. For this reason, it is possible to easily manage the radio dosimeter 2 in the radiation management area.
By including the corresponding entrance / exit management device identification code a2 in the activation signal from the entrance / exit management device 3, the user's ID is surely placed even in a place where a plurality of entrance / exit management devices 3 are arranged. The information c1 and the dosimeter identification code b1 can be associated with each other.

Separate start-up means (electromagnetic induction circuit 2-7, electromagnetic induction section 3-5) of wireless dosimeter 2 and communication means (RF section 2-2 for communication with wireless transmission / reception device 4 and antenna 3-4) By doing so, the radio dosimeter 2 is activated by any one of electromagnetic induction, infrared rays, and ultrasonic waves that do not cause radio wave interference for communication when the other party cannot be specified, and communicates with the activated dosimeter 2 to obtain the ID. Information c1 is associated. Since the communication after this association is completed can be communicated so as not to make a mistake by specifying the communication partner using the ID information c1, it is possible to communicate in a wide range. As described above, after associating the user ID information with the wireless dosimeter 2, it is possible to communicate with the wireless dosimeter 2 in a wide area in the radiation management area 10. Since this function does not require a dosimeter lending device which is a new facility as in the prior art, the facility cost does not increase.
That is, it is possible to easily manage the dosimeter in the radiation management area without increasing the equipment cost.

(Second Embodiment)
FIG. 7 is a diagram showing the configuration of the antenna of the wireless dosimeter according to the second embodiment of the present invention.
The wireless dosimeter 2 described in the first embodiment includes, as an antenna, a radio antenna 2-1a connected to the RF unit 2-2 and an electromagnetic induction connected to the electromagnetic induction circuit 2-7. And a receiving antenna 2-1b. These antennas 2-1a and 2-1b are accommodated in an antenna case 2-10 made of a material such as resin that can transmit radio waves.

  The antennas 2-1a and 2-1b are the main body of the wireless dosimeter 2, as shown in the external view of the wireless dosimeter 2 in FIG. It is incorporated in a metal casing 2-11 housed in a sealed state. In this case, a concave portion having a size in which an elongated rectangular parallelepiped antenna case 2-10 is just fitted is formed on one side portion of the metal casing 2-11, and is incorporated into the concave portion.

Each of the components 2-2 to 2-7 is housed in a substantially hermetically sealed state inside the metal casing 2-11 in order to eliminate the influence of electromagnetic waves from the outside, but each of the antennas 2-1a and 2-1b. Since it is necessary to communicate with the outside, it protrudes from the through hole of the metal casing 2-11 and is accommodated in the antenna case 2-10.
As shown in FIG. 8, a display unit 2-12 made of liquid crystal or the like and a measurement window 2-13 for measuring radiation dose are arranged on the surface of the metal casing 2-11.

As shown in FIG. 9, the radio antenna 2-1a is formed by depositing, trimming, etc. a metal wiring pattern (also referred to as an antenna pattern or a wiring pattern) such as aluminum or copper on the printed circuit board 11 in the antenna case 2-10. It is comprised by forming by the general method of.
At this time, in order to reduce the size of the radio antenna 2-1a and match the antenna frequency at a desired frequency, the inductor 12 and the capacitor 13 that are lumped constant components are connected to the antenna pattern and mounted. That is, the inductor 12 is a lumped constant component for the purpose of shortening the wavelength of the radio signal, and the capacitor 13 is a lumped constant component for matching at a desired frequency.

As the antenna pattern, the antenna element length may be increased by forming a pattern using only one side of the printed circuit board 11 or forming a pattern on both sides of the printed circuit board 11 so that the both surfaces are connected.
The electromagnetic induction receiving antenna 2-1b is formed by a coil, and the coil 2-1b is connected to the capacitor 14 by a wiring pattern. The capacitor 14 resonates with the coil 2-1b at a desired frequency. In this example, the capacitor 14 is arranged in the antenna case 2-10 as shown in FIG. You may arrange.

Next, refer to the sequence diagram shown in FIG. 10 for the operation of the management process of the radio dosimeter 2 in which the radio antenna 2-1a and the electromagnetic induction receiving antenna 2-1b are mounted in the antenna case 2-10. To explain.
The wireless dosimeter 2 does not hold information other than the dosimeter number at first, and is waiting for activation (S2-1a).
On the other hand, when the ID card owned by a person is presented to the ID card reading unit 3-3, the entrance / exit management device 3 reads the identification information (ID information) in the ID card and holds the ID information ( S3-1a). Next, the entrance / exit area management device 3 transmits an activation signal by the electromagnetic induction unit 3-5 to call a nearby dosimeter (S3-2a).

  When the radio dosimeter 2 receives the activation signal by the electromagnetic induction receiving antenna 2-1b, the radio dosimeter 2 enters an activated state, and information including the dosimeter identification code of the own radio dosimeter 2 is entered. Wirelessly transmitted from the wireless antenna 2-1a (S2-2a). The entrance / exit management device 3 that has received the message addressed to the entrance / exit management device retains the dosimeter identification code b1 (S3-3a), and the wireless dosimeter 2 to be retained is communicated wirelessly from now on. A request or setting data is wirelessly transmitted to the recognized wireless dosimeter 2 (S3-4a).

This information is received by the wireless dosimeter 2 by the wireless antenna 2-1a (S2-3a), and a response to this reception is transmitted wirelessly from the wireless antenna 2-1a to the entrance / exit management device 3 (S2- 4a) The communication is terminated. Note that the communication end of the wireless dosimeter 2 may be performed as in this example, or may be ended by end communication from the entrance / exit area management device 3.
On the other hand, when the entrance / exit management device 3 confirms the response from the wireless dosimeter 2 in step S2-4a (S3-5a), the communication ends. Here, if there is data to be transmitted to the wireless dosimeter 2 continuously, the entrance / exit management device 3 does not end the communication but wirelessly transmits it.

As in this communication sequence, the wireless dosimeter 2 is not initially subjected to electromagnetic induction reception and wireless communication, such as waiting for activation by electromagnetic induction and performing wireless communication after activation.
Therefore, the LF (Low Frequency) band or HF (High Frequency) band electromagnetic induction receiving antenna and the VHF (Very High Frequency) band or UHF (Ultra High Frequency) band wireless antenna are shared and switched. It can be configured to use. An example of the circuit configuration common to the antenna will be described with reference to FIG.

  That is, the antenna sharing circuit has an LF band or HF band electromagnetic induction receiving antenna 21 formed by a coil on a printed board 11, and a terminal 23a connected to the antenna 21 via a wiring pattern. And a first changeover switch 23 connected to the terminal 23b via the capacitor 22, a second changeover switch 24 connected to the movable part 24a via the wiring pattern to the electromagnetic induction receiving antenna 21 and the capacitor 22, An antenna terminal 26 of the VHF band or UHF band connected to the terminal 24b of the second changeover switch 24 via a lumped constant component 25 of a capacitor or inductance, a terminal 23c of the first changeover switch 23, and a concentration. A ground terminal 27 connected to the constant component 25 with a wiring pattern, and the second changeover switch 2 The LF band or HF band antenna terminal 28 connected to the terminal 24c of the first switch 23 and the movable part 23d of the first changeover switch 23 and the switch connected to the movable part 24a of the second changeover switch 24 by the wiring pattern And a control terminal 29.

The capacitor 22 resonates with the electromagnetic induction receiving antenna 21 at a desired frequency. The lumped constant component 25 is for antenna matching in the VHF band or the UHF band. Each change-over switch 23 and 24 switches antennas, and is composed of an active circuit such as a transistor circuit, an FET (Field Effect Transistor) circuit, or a diode circuit.
The VHF band or UHF band antenna terminal 26 is connected to the RF section 2-2, and the LF band or HF band antenna terminal is connected to the electromagnetic induction circuit 2-7. The switch control terminal 29 is connected to the CPU 2-3.

FIG. 12 shows connections when the antenna sharing circuit having such a configuration is used as an antenna for the LF band or the HF band, and the operation thereof will be described.
When an LF band or HF band switch control signal is input to the switch control terminal 29 in accordance with the control of the CPU 2-3, the movable portion 23d of the first changeover switch 23 has three terminals 23a in response to the control signal. , 23b, 23c are connected, and the movable portion 24a of the second changeover switch 24 is connected to the terminal 24c.

  As a result, the electromagnetic induction receiving antenna 21 in the LF band or HF band is connected in parallel with the capacitor 22 between the ground terminal 27 and the antenna terminal 28 in the LF band or HF band, so that a resonance circuit is formed. As a result, a reception signal in the LF band or the HF band appears between the antenna terminal 28 in the LF band or the HF band and the ground terminal 27. This received signal is output to the electromagnetic induction circuit 2-7.

  Next, when a reception signal of LF band or HF band is input to the electromagnetic induction circuit 2-7, a switch control signal of VHF band or UHF band is input to the switch control terminal 29 in accordance with the control of the CPU 2-3. . In response to this control signal, as shown in FIG. 13, the movable portion 23d of the first changeover switch 23 is separated from the three terminals 23a, 23b, and 23c, and the movable portion 24a of the second changeover switch 24 is connected to the terminal 24b. Connected.

  As a result, the electromagnetic induction receiving antenna 21 is connected to the VHF band or UHF band antenna terminal 26 via the second changeover switch 24 and the lumped constant component 25, so that the electromagnetic induction receiving antenna 21 becomes the wavelength shortening antenna. Thus, matching is achieved at a desired frequency by the matching circuit using the lumped constant component 25, and a reception signal in the VHF band or UHF band appears between the ground terminal 27 and the antenna terminal 26 in the VHF band or UHF band. This received signal is output to the RF unit 2-2.

As described above, according to the radio dosimeter 2 equipped with the antenna of the second embodiment, the radio antenna 2-1a includes the antenna pattern of the printed circuit board 11 and the lumped constant components of the inductor 12 and the capacitor 13. By configuring in combination, the size of the wireless antenna 2-1a can be reduced.
Thus, a space for installing the coil as the electromagnetic induction receiving antenna 2-1b and the resonance capacitor 14 can be secured in the antenna case 2-10. Therefore, the size of the antenna case 2-10 can be reduced. As a result, the size of the wireless dosimeter 2 can be reduced.
In addition, even when the electromagnetic induction receiving antenna in the LF band or the HF band and the wireless antenna in the VHF band or the UHF band are shared, the size of the antenna case 2-10 can be kept small. The size of the wireless dosimeter 2 can be reduced.

It is an external view of the charge rental apparatus and the entrance / exit area management apparatus which accommodate the radio | wireless dosimeter which concerns on the 1st Embodiment of this invention. It is a block diagram which shows the internal structure of the radio | wireless dosimeter which concerns on 1st Embodiment. It is a figure which shows the external structure of the said entrance / exit management apparatus. It is a block diagram of the radiation management system which manages the radio | wireless dosimeter which concerns on 1st Embodiment. It is a sequence diagram for demonstrating operation | movement of the management process of this radio | wireless dosimeter in the said radiation management system. It is a figure which shows the structure of the information signal transmitted / received with the radio | wireless dosimeter which concerns on 1st Embodiment, and an entrance / exit area management apparatus. It is a figure which shows the structure of the antenna of the radio | wireless dosimeter which concerns on the 2nd Embodiment of this invention. It is an external view of a wireless dosimeter. It is a figure which shows the structure of the radio | wireless antenna and electromagnetic induction receiving antenna on the printed circuit board in the antenna case of the radio | wireless dosimeter which concerns on 2nd Embodiment. It is a sequence diagram for demonstrating operation | movement of the management process of the radio | wireless dosimeter of 2nd Embodiment. It is a figure which shows the structural example of the antenna shared circuit by the electromagnetic induction receiving antenna of LF band or HF band, and the radio | wireless antenna of VHF band or UHF band. It is a figure which shows the connection state in the case of using the said antenna shared circuit as an electromagnetic induction receiving antenna of LF band or HF band. It is a figure which shows the connection state in the case of using the said antenna shared circuit as a radio | wireless antenna of a VHF band or a UHF band.

Explanation of symbols

1 Charging / lending device 2 Wireless dosimeter 2-1 Antenna 2-2 RF unit 2-3 CPU
2-4 Memory unit 2-5 Measuring unit 2-6 Notification unit 2-7 Electromagnetic induction circuit 3 Entrance / exit area management device 3-1 Display device 3-2 Operation switch 3-3 ID card reading unit 3-4 Antenna 3- 5 Electromagnetic induction unit 4 Wireless transmission / reception device 5 Communication network 6 System monitoring device

Claims (10)

Personal identification information is acquired and stored through communication with an entrance / exit management device that manages entry / exit into the radiation control area. After this storage, the radiation dose is measured in the radiation control area and the measured value is communicated. In a wireless dosimeter that wirelessly transmits to the monitoring device through the device,
A wireless dosimeter comprising: means for activating wireless means so that wireless communication is possible when receiving an electromagnetic radiation signal by electromagnetic induction from the entrance / exit management device. The means according to claim 1, further comprising means for recognizing the identification code signal when the electromagnetic radiation signal from the entry / exit management device includes the identification code signal of the entrance / exit management device. Wireless dosimeter. Personal identification information is acquired and stored through communication with an entrance / exit management device that manages entry / exit into the radiation control area. After this storage, the radiation dose is measured in the radiation control area and the measured value is communicated. In a wireless dosimeter that wirelessly transmits to the monitoring device through the device,
A wireless dosimeter comprising means for activating wireless means so that wireless communication can be performed when receiving an infrared signal from the entrance / exit management device. The radio according to claim 3, further comprising means for recognizing the identification code signal when the infrared code signal from the entry / exit management device includes the identification code signal of the entry / exit management device. Dosimeter. Personal identification information is acquired and stored through communication with an entrance / exit management device that manages entry / exit into the radiation control area. After this storage, the radiation dose is measured in the radiation control area and the measured value is communicated. In a wireless dosimeter that wirelessly transmits to the monitoring device through the device,
A wireless dosimeter comprising means for activating wireless means in a state where wireless communication is possible when an ultrasonic signal is received from the entrance / exit management device. 6. The means according to claim 5, further comprising means for recognizing the identification code signal when the ultrasonic signal from the entry / exit management device includes the identification code signal of the entry / exit management device. Wireless dosimeter. A wireless antenna for performing wireless communication by the wireless means is mounted by mounting a metal wiring pattern on a printed circuit board and connecting a lumped constant component for matching the antenna frequency at a desired frequency to the metal wiring pattern. The radio dosimeter according to claim 1, wherein the printed circuit board on which the radio antenna is formed is accommodated in a case made of a radio wave transmitting material. . A wireless antenna for performing wireless communication by the wireless means is mounted by mounting a metal wiring pattern on a printed circuit board and connecting a lumped constant component for matching the antenna frequency at a desired frequency to the metal wiring pattern. In addition, an electromagnetic induction receiving antenna for receiving electromagnetic radiation signals is formed on the printed circuit board by connecting a coil and a capacitor with a metal wiring pattern and mounting them. The radio dosimeter according to claim 1 or 2, wherein the printed circuit board on which the antenna for electromagnetic induction reception is formed is accommodated in a case formed of a radio wave transmitting material. On the printed circuit board, a changeover switch for switching between the radio antenna and the electromagnetic induction receiving antenna is connected between the radio antenna and the electromagnetic induction receiving antenna. Ready,
Before receiving the electromagnetic radiation signal, the changeover switch is controlled so that only the electromagnetic induction receiving antenna is in an operational state, and when the electromagnetic radiation signal is received by the electromagnetic induction receiving antenna in the operational state. 9. The wireless dosimeter according to claim 8, further comprising control means for controlling the changeover switch so that only the radio antenna is in an operating state.   10. The wireless system according to claim 8, wherein the electromagnetic induction receiving antenna receives a frequency signal in an LF band or an HF band, and the wireless antenna receives a frequency signal in a VHF band or a UHF band. Dosimeter.

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