JP2013104825A - Estimation system and method for individual radiation exposure doses - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an individual person to estimate his/her individual radiation exposure doses without carrying a potable measuring device for radiation exposure doses with him/her.SOLUTION: An estimation system for individual radiation exposure doses inputs measured current location information of a portable terminal carried by a user and detailed location information showing details of the current location. The system calculates an estimated value of the user's radiation exposure dose by correcting a radiation exposure dose equivalent at the measured current location specified with dose distribution control information, which shows a plurality of radiation exposure dose equivalents corresponding to a plurality of locations, on the basis of the details of the current location shown by the input detailed location information. The system outputs a calculated estimated value.

Description

  The present invention relates to a technique for estimating an individual's exposure dose.

  In order to measure an individual exposure dose in an area contaminated by a nuclear disaster or the like, a portable measuring device (hereinafter referred to as a pocket dosimeter) that measures the individual exposure dose is used. Each individual carries a pocket dosimeter.

  Further, Patent Document 1 calculates the soil contamination status for each region and the radiation exposure dose predicted for each region from accident information and weather conditions at the time of the occurrence of a nuclear disaster. A method for transmitting calculation results and the like is disclosed.

Japanese Patent Application No. 10-133192

  According to the above prior art, in order to grasp the individual exposure dose, each individual needs to have a pocket dosimeter for measuring the exposure dose. For this reason, it is necessary to prepare a large amount of pocket dosimeters at the time of a large-scale nuclear disaster in which many disaster victims occur.

  Moreover, in patent document 1, although the radiation exposure dose of a resident can be predicted and transmitted from the situation at the time of a nuclear disaster, the radiation dose of a resident individual cannot be predicted.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to make it possible to estimate an individual's exposure dose without a pocket dosimeter.

  The personal exposure dose estimation system inputs position information indicating the measured current position of the portable terminal carried by the user, and inputs position detailed information which is information indicating details of the current position. The system inputs the dose equivalent equivalent of the exposure dose equivalent specified based on the dose distribution management information, which is the information representing the multiple dose equivalent doses corresponding to the multiple points. The estimated value of the exposure dose of the user is calculated by correcting the current position details indicated by the detailed position information. The system outputs the calculated estimated value.

  This system may be a mobile terminal, a server capable of communicating with the mobile terminal, or may include a mobile terminal and a server.

  Individual doses can be estimated without a pocket dosimeter.

It is the figure which showed the example of a structure of the personal exposure dose estimation system which concerns on embodiment. It is the figure which showed the structural example of the portable terminal which concerns on embodiment. It is a figure showing an example of composition of a server computer concerning an embodiment. It is a figure showing an example of composition of software concerning an embodiment. It is the figure which showed the example of the exposure reduction coefficient table which concerns on embodiment. It is the figure which showed the example of the dose distribution database which concerns on embodiment. It is the figure which showed the example of the personal exposure log | history data concerning embodiment. It is an example of the flowchart of the exposure protection setting process which concerns on embodiment. It is an example of the flowchart of the personal exposure dose estimation process which concerns on embodiment. It is an example of the flowchart of the designated point vicinity dose data acquisition process which concerns on embodiment.

  Hereinafter, embodiments will be described in detail with reference to the drawings.

  FIG. 1 is a diagram illustrating a configuration example of a personal exposure dose estimation system according to an embodiment.

  The personal exposure dose estimation system includes a portable terminal 1, a server computer 2, and a dose distribution database 3. Communication between the portable terminal 1 and the server computer 2 is performed via the wireless network 4.

  The mobile terminal 1 is a portable information communication terminal that can be carried by a user and has a GPS (Global Positioning System) function. In this embodiment, the mobile terminal 1 is a mobile phone that can install and execute an application program. However, the mobile terminal 1 is not limited to such a mobile phone, but may be another type of terminal, for example, a portable GPS device or a notebook personal computer. The mobile terminal 1 acquires position information of the mobile terminal 1 from the GPS satellite 5.

  The server computer 2 is connected to a storage device having the dose distribution database 3 (or has a built-in storage device), searches the dose distribution database 3 for data that meets the search conditions, and reads the found data.

  There may be a plurality of portable terminals 1 according to the number of persons who want to estimate the individual dose (for example, each person may own), and the server computer 2 can process requests from the plurality of portable terminals 1.

  FIG. 2 is a diagram illustrating a configuration example of the mobile terminal 1.

  The mobile terminal 1 includes an input unit 11, a display unit 12, a GPS module 13, a speaker 14, a wireless communication interface 16, a memory 17, and a calculation unit 15 connected to them.

  The input unit 11 is an element that receives input from the user, and is, for example, a plurality of buttons or a touch panel display (in the latter case, the input unit 11 and the display unit 12 may be integrated). The input unit 11 inputs information related to estimation of an individual exposure dose.

  The display unit 12 is a display device having a display screen such as a liquid crystal display, and may be a touch panel type display device. The display unit 12 displays the estimation result of the individual exposure dose.

  The GPS module 13 receives radio waves from GPS satellites and measures the current location of the mobile terminal 1.

  The speaker 14 emits a sound such as an alarm sound. In this embodiment, the alarm sound is emitted when the calculated integrated exposure dose exceeds a preset upper limit value.

  The arithmetic unit 15 is, for example, a microprocessor (typically a CPU (Central Processing Unit)) or a circuit including the processor. Input / output processing for at least one of the speaker 14, the input unit 11, the display unit 12, the GPS module 13, the speaker 14, the wireless communication interface 16, and the memory 17 and arithmetic processing based on the input / output are performed.

  The wireless communication interface 16 communicates with the server computer 2.

  The memory 17 stores information related to estimation of an individual exposure dose (an exposure reduction coefficient table 102 and protection setting data 103 (see FIG. 4) described later) and personal exposure history data 115 (see FIG. 4). The memory 17 may be a non-volatile memory. Instead of the memory 17, another type of storage device may be provided as a storage unit.

  FIG. 3 is a diagram showing a configuration example of the server computer 2.

  The server computer 2 includes a main memory 22, an auxiliary storage device 23, a wireless communication interface 24, a database access interface 25, and a computing unit 21 connected thereto.

  The main memory 22 is a main storage device, for example, a memory such as a DRAM. The main memory 22 temporarily stores data necessary for executing the computer program.

  The auxiliary storage device 23 is a non-volatile storage device such as an HDD. The auxiliary storage device 23 stores a computer program.

  The wireless communication interface 24 communicates with the mobile terminal 1.

  The database access interface 25 is an interface for accessing the dose distribution database 3, and is, for example, an HBA (Host Bus Adapter) for communicating with an external device such as a storage device.

  FIG. 4 is a diagram showing an example of the software configuration of the individual exposure dose estimation system.

The mobile terminal 1 has the following elements:
(*) An exposure protection setting unit 101 that writes the current position situation and the integrated personal exposure dose upper limit value input by the input unit 11 to the exposure protection setting data 103 on the memory 17;
(*) An exposure reduction coefficient table 102 in which an exposure reduction coefficient according to the current location situation is written;
(*) A GPS positioning unit 111 that measures the current position based on radio waves received from GPS satellites;
(*) A dose inquiry unit 112 that acquires a dose equivalent of the current position from the server computer 2 by transmitting an inquiry including the positioning data of the current position to the server computer 2;
(*) An exposure reduction coefficient corresponding to the current situation written in the exposure protection setting data 102 is acquired from the exposure reduction coefficient table 102, and the individual exposure dose is obtained by multiplying the dose equivalent acquired from the server computer 2 and the exposure reduction coefficient. Exposure dose estimation calculation unit 113 that estimates and calculates
(*) A history data storage unit 114 that writes the individual exposure dose obtained by the exposure dose estimation calculation unit 113 to the exposure history data 115 constructed on the memory 17;
(*) An exposure dose display processing unit 116 for displaying the individual exposure dose on the display unit 12;
(*) A high-dose warning processing unit 117 that outputs an alarm sound to the speaker 14 when the accumulated individual exposure dose exceeds the exposure dose upper limit set in the exposure protection setting data 103;

The server computer 2 includes the following elements:
(*) A dose inquiry processing unit 201 that receives and responds to a request from the dose inquiry unit 112 in the mobile terminal 1;
(*) A designated point vicinity dose search unit 202 that searches the dose distribution database 3 for a dose equivalent near the position based on the position data included in the inquiry received by the dose inquiry unit 112;
(*) It has the designated point occupation estimation calculation part 203 which estimates and calculates the dose equivalent of the point which the said position data show based on the dose equivalent searched by the designated point vicinity dose search part 202. FIG.

  Here, for example, as shown in FIG. 5, the exposure coefficient table 102 includes a code, a setting of the current location, and an exposure reduction coefficient. According to the example of FIG. 5, the maximum value of the exposure coefficient is 1, but the maximum value is not limited to 1. The exposure coefficient may be a relative coefficient according to the setting of the current location situation with reference to a certain current location situation.

  As shown in FIG. 6, for example, the dose distribution database 3 includes data including a point (for example, a point expressed by a combination of latitude and longitude) and a dose equivalent at that position. The dose equivalent is a value based on the result of actual measurement at each point, and may be updated at each measurement.

  For example, as shown in FIG. 7, the exposure history data 115 includes a time at which an individual exposure dose is estimated, a point (latitude and longitude) corresponding to the estimated individual exposure dose, and an exposure protection setting code (illustrated in FIG. 5). , A code corresponding to the current position situation) and estimated personal exposure dose. A valid row (a row in which a value is written) of the data 115 is added each time an individual exposure dose is estimated by the exposure dose estimation calculation unit 113.

  FIG. 8 is an example of a flowchart of the exposure protection setting process in the mobile terminal 1.

  An exposure protection setting composed of the current situation and the integrated exposure dose upper limit value is input from the input unit 11 of the portable terminal 1 (step 101). At this time, the current location status is input by the user at the timing when the current location status changes as shown in FIG. The input current location situation may be, for example, a current location situation selected by the user from a plurality of types of current location situations shown in the exposure coefficient reduction table 102 shown in FIG. Specifically, for example, when the user moves from the outside to a “one-story or two-story block or brick house”, the mobile terminal 1 starts a predetermined application program installed on the mobile terminal 1. According to the guidance of the application program, “one-story or two-story block or brick house” is input from a plurality of types of current location states indicated by the exposure coefficient reduction table 102 shown in FIG. Thereby, the portable terminal 1 can memorize | store a user's present location condition. Note that the current location status may be detected automatically instead of manually, for example. For example, based on the map information of the external site and the current position detected by the GPS positioning unit 111, when the current position is included in a building area, it may be detected that the current location of the user is indoor. Further, the upper limit value of the integrated exposure dose may be a value set in an arbitrary period such as an integrated value for one day or an integrated value for one year.

  Next, the exposure protection setting unit 101 writes the input exposure protection settings (current position and integrated exposure dose upper limit value) in the exposure protection setting data 103 (step 102).

  FIG. 9 is an example of a flowchart of processing for estimating the individual exposure dose in the mobile terminal 1.

  First, the GPS positioning unit 111 measures the current position of the mobile terminal 1 based on the radio wave received by the GPS module 13 from the GPS satellite (step 111).

  Next, the dose inquiry unit 112 transmits a dose equivalent inquiry including the current position data obtained in step 111 to the server computer 2 via the wireless communication interface 16, and in response to the inquiry, the dose inquiry from the server computer 2. The equivalent is received via the wireless communication interface 16 (step 112).

  Next, the exposure dose estimation calculation unit 113 acquires the integrated exposure dose upper limit value and the current location situation set in the exposure protection setting data 103, and acquires the exposure reduction coefficient corresponding to the current location situation from the exposure reduction factor table 102. (Step 113).

  Next, based on the dose equivalent (dose equivalent at the current position) represented by the information received in Step 112 and the exposure reduction coefficient obtained in Step 113 (for example, multiplying these values) To calculate the individual exposure dose (step 114).

  Next, the history data storage unit 114 stores the individual exposure dose and time calculated in step 114 in the exposure history data 115 (step 115).

  Next, the exposure dose estimation calculation unit 113 calculates the accumulated individual exposure dose by integrating past individual exposure doses stored in the individual exposure history data 115. The period of integration is the period of the integrated exposure dose upper limit set in step 102. In parallel with this, for example, a request for an integration period such as a daily exposure dose or a one-year exposure dose is made. You may receive from the input part 11 and may accumulate | accumulate based on it (step 116).

  Next, the exposure dose display processing unit 116 displays the individual exposure dose calculated in step 114 and the accumulated individual exposure dose calculated in step 116 on the display unit 12 of the portable terminal 1 (step 117).

  Next, the exposure dose estimation calculation unit 113 compares the integrated individual exposure dose obtained in step 116 with the integrated exposure dose upper limit acquired in step 113. When the integrated personal exposure dose exceeds the integrated exposure dose upper limit, the warning processing unit 117 outputs an alarm sound to the speaker 14 and / or displays a warning on the display processing unit 116 (step 118).

  FIG. 10 is an example of a flowchart of dose equivalent acquisition processing in the server computer 2.

  First, the dose inquiry processing unit 201 receives a dose equivalent inquiry from the mobile terminal 1 (step 201).

  In response to this inquiry, the dose equivalent corresponding to the position represented by the position data included in the inquiry is specified based on the dose distribution database 3, and the specified dose equivalent is notified to the portable terminal 1. A specific example of this processing is as shown in steps 202 to 204.

  That is, the designated point vicinity dose search unit 202 searches the dose distribution database 2 for three dose equivalents in order from the point closest to the position data included in the inquiry received in step 201 (step 202).

  Next, the designated point dose estimation calculation unit 203 obtains a distance between each of the three dose equivalent measurement positions searched in Step 202 and the position data in the inquiry in Step 201. Further, the designated point dose estimation calculation unit 203 obtains a ratio of the distances of the remaining two points when the distance to the nearest dose equivalent measurement position is 1, and performs weighted averaging with a numerical value of one of the values as a weight. The dose equivalent at the inquiry position is estimated and calculated (step 203).

  Next, the designated point dose estimation calculation unit 203 transmits the dose equivalent obtained in step 203 to the mobile terminal 1. (Step 204)

  As described above, according to the present embodiment, the user can grasp from the mobile terminal 1 the individual exposure dose estimated by using the actual measurement data stored in the dose distribution database 3 without having a pocket dosimeter. . In addition, the user can know changes such as the cumulative individual exposure dose exceeding the upper limit value from the alarm sound and display of the mobile terminal 1.

  Although one embodiment has been described above, the present invention is not limited to that embodiment.

  For example, detection of the current position of the mobile terminal is not limited to a method using GPS, but other types of methods may be used.

  In addition, the current location status of outdoor or indoor may be automatically specified. For example, the current location status of whether the mobile terminal 1 is outdoors or indoors may be specified based on the intensity of the received radio wave or the detected position and map information. Alternatively, it may be possible to select a mode in which the current location state is set to manual input or automatic detection.

  Further, the function as the exposure dose estimation calculation unit 113 may exist in an external device (for example, the server computer 2) of the mobile terminal 1. Information indicating the processing result of the calculation unit 113 may be transmitted to the mobile terminal 1, information according to the processing result may be displayed on the display unit 12, or a warning sound according to the processing result may be output from the speaker 14. good.

  The method of correcting the dose corresponding to the current location based on the current location is not limited to the method of using the product of the exposure reduction coefficient corresponding to the current location and the dose corresponding to the current location as the exposure dose.

1 ... mobile terminal, 2 ... server computer, 3 ... dose distribution database

Claims (7)

A position information input unit for inputting position information indicating a current position of a portable terminal which is a portable information communication terminal carried by a user;
A position detail input unit for inputting position detail information which is information representing details of the current position;
It is an exposure dose equivalent specified based on dose distribution management information which is information representing a plurality of exposure dose equivalents corresponding to a plurality of points, and an exposure dose equivalent at the current position represented by the input position information, A calculation unit that calculates an estimated value of the exposure dose of the user by correcting based on the current position details represented by the input detailed position information;
An individual exposure dose estimation system including an output unit that outputs information representing the estimated exposure dose. An individual dose estimation system according to claim 1,
The estimated value is calculated at a plurality of points in time,
A history storage unit that stores history information including a combination with the estimated value calculated at each time point;
The calculation unit calculates an integrated value of an estimated value represented by a plurality of pieces of history information,
The output unit outputs the integrated value;
Personal dose estimation system. An individual dose estimation system according to claim 2,
The output unit outputs a warning when the integrated value exceeds a predetermined upper limit;
Personal dose estimation system. An individual exposure dose estimation system according to claim 3,
The history information includes the time at which the estimated value was calculated for each estimated value,
The integrated value is an integrated value of an estimated value from a certain time to a certain time.
Personal dose estimation system. The personal exposure dose estimation system according to any one of claims 1 to 4,
The mobile terminal and a server capable of communicating with the mobile terminal,
The portable terminal includes the position information input unit, the position detail input unit, the calculation unit, and the output unit, and further, the dose equivalent dose at the current position represented by the input position information. A dose equivalent inquiry section for sending an inquiry to the server;
In response to the inquiry, the server specifies an exposure dose equivalent at the current position based on dose distribution management information that is information representing a plurality of exposure dose equivalents corresponding to a plurality of points, and specifies the specified exposure dose. Having a dose equivalent specifying part for notifying the mobile terminal of the equivalent,
Personal dose estimation system. The personal exposure dose estimation system according to any one of claims 1 to 4,
The mobile terminal and a server capable of communicating with the mobile terminal,
The portable terminal has the position information input unit, the position detail input unit, and the output unit,
The server includes the computing unit;
Personal dose estimation system.
(A) Input position information indicating the measured current position of a portable terminal that is a portable information communication terminal carried by the user,
(B) Enter location details information that is information representing details of the current location,
(C) A current position that is an exposure dose equivalent specified based on dose distribution management information that is information representing a plurality of exposure dose equivalents corresponding to a plurality of points, and that is represented by the position information input in (A). By correcting the exposure dose equivalent at the current position details represented by the position detailed information input in (B), an estimated value of the user's exposure dose is calculated,
(D) outputting the estimated value sent in (C),
Personal dose estimation method.

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