JP6692235B2 - Air dose rate distribution monitoring device, method and program - Google Patents

Description

  Embodiments of the present invention relate to a technique for monitoring an air dose rate distribution in an area.

  In the high dose area of a nuclear power plant, the dose rate of the atmosphere changes moment by moment due to the progress of work and shielding measures. Therefore, in order to reduce the exposure of workers, the latest air dose rate distribution is constantly grasped, and measures for shielding and decontamination and restrictions on entry are implemented. However, in a large-scale plant, since the work area is wide, the burden of management work for grasping the dose rate is large.

Therefore, in the present situation, an atmospheric dosimeter is permanently installed in the work area so that the dose rate is constantly measured. By the way, in order to detect hot spots showing a high dose rate locally without leaking, it is necessary to arrange the atmosphere dosimeters densely in the work area.
However, in order to cover the entire work area, it is necessary to install a large number of atmospheric dosimeters and to establish a communication network to collect a large amount of measurement data transmitted from these, and this is a reality from a cost perspective. Not at all.

  On the other hand, a technique is known in which a gamma camera is used to measure the air dose rate and the direction of flight information, and the dose rate distribution in the work area is displayed in a contour diagram. According to this, even when the movement of the worker is limited, it is possible to operate the single gamma camera to grasp the dose rate distribution in a wide range.

JP, 2014-071013, A

  However, in the technique using the gamma camera, it is necessary to put a worker in the high dose area only for the purpose of photographing, and the measurement frequency is limited to 1 to 2 times / day. For this reason, it is not suitable for use in monitoring the dose rate distribution that changes from moment to moment according to the progress of construction in a wide range of work areas such as the entire plant.

  The embodiment of the present invention has been made in consideration of such circumstances, and an object of the present invention is to provide a technique for highly reliable monitoring of an air dose rate distribution which varies from moment to moment in a wide area.

In the air dose rate distribution monitoring apparatus according to the embodiment of the present invention, a positioning unit attached to a worker moving in an area and a data receiving unit that receives the positioning data and the dose rate data transmitted from each of the dosimeters. A calculation unit that calculates coordinate data of the area based on the positioning data, a data holding unit that holds the coordinate data and the corresponding dose rate data in association with each other, and the dose held within a designated period. The data storage unit includes a map generation unit that generates a map that reflects numerical information of rate data based on the coordinate data, and a storage unit that stores a mesh map that divides the area in units of meshes. , The address data of the corresponding mesh instead of the coordinate data is held in association with the corresponding dose rate data, and the designation is performed. The expression of the mesh in which a plurality of the dose rate data corresponding to each other are held reflects numerical value information that is averaged from the plurality of dose rate data, and the average calculation is the positioning. It is characterized in that a weighting factor based on the speed information of the worker derived from the data is given to each of the plurality of dose rate data and then executed .

  Embodiments of the present invention provide a technique for reliably monitoring an air dose rate distribution that changes from moment to moment over a wide area.

The block diagram which shows the monitoring apparatus of air dose rate distribution which concerns on embodiment of this invention. (A) Overall view of a mesh map, (B) A diagram showing the movement trajectory of a worker. (A) A partially enlarged view of a mesh map in which a dose rate distribution in an area is converted into luminance information and (B) a partially enlarged view of a mesh map in which a dose rate in a mesh of interest is shown in different directions. 3 is a flowchart illustrating steps of a method for monitoring an air dose rate distribution and an algorithm of a monitoring program therefor according to the embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
As shown in FIG. 1, the air dose rate distribution monitoring apparatus 10 according to the embodiment includes a positioning data 26 and a dose transmitted from each of a positioning meter 22 and a dosimeter 23 attached to a worker 21 moving in an area 20. The data receiving unit 11 that receives the rate data 27, the storage unit 16 that includes the coordinate data 25 of the entire area and that stores the mesh map 30 that divides the area 20 in units of the mesh 31 (FIG. 3), and the received positioning The data holding unit 18 that holds the address data 28 of the mesh 31 corresponding to the data 26, the corresponding dose rate data 27, and the corresponding time data 29 in association with each other, and the numerical values of the dose rate data 27 held within the designated period 44. A map generator 54 that generates a mesh map 30 that reflects the information and represents the corresponding mesh 31. To have.

As a modified example of the present embodiment, the map may be generated by performing processing by associating the coordinate data 25 with the dose rate data 27 instead of the address data 28 of the mesh map.
Further, when the data holding unit 18 has a function of holding data only within the designated period 44, it is not necessary to associate the dose rate data 27 with the time data 29 .

The worker 21 who performs the work in the high-dose area 20 is managed so as not to exceed the upper limit of the exposure dose specified by law. The worker 21 wears a radiation protection suit, and also wears a positioning meter 22 and a dosimeter 23.
Further, the worker 21 is equipped with the data transmission unit 24, and the positioning data 26 measured by the positioning meter 22 and the dose rate data 27 measured by the dosimeter 23 are wirelessly transmitted from the data transmission unit 24. The positioning data 26 and the dose rate data 27 need not be synchronized with each other from the data transmitting unit 24.

Specifically, the positioning device 22 is a Global Positioning System (GPS) if the target area 20 is outdoors, and if it is indoors, autonomous navigation using an inertial sensor or broadband wireless (UWB: Ultra). A system that applies a surveying method using radio waves such as Wide Band) can be applied. However, the positioning device 22 is not limited to these, and is lightweight and small enough not to impede the degree of freedom of the limbs of the worker 21, and can detect the positioning data 26 in real time at short cycle intervals. If so, it can be appropriately adopted.
Here, the positioning data 26 includes at least the position information of the area 20, and may further include the direction information in which the positioning meter 22 is facing.

Specifically, a GM tube, a semiconductor scintillator, or the like is applied as the dosimeter 23. However, the dosimeter 23 is not limited to these, is lightweight and small enough not to interfere with the degree of freedom of the limbs of the worker 21, and can detect the dose rate data 27 in real time at short cycle intervals. If so, it can be appropriately adopted.
Here, the dose rate data 27 is a measurement of the air dose rate (Gy / h or Sv / h) which is the radiation dose per unit time of the atmosphere by detecting the radiation.

FIG. 2A shows a mesh map 30 showing map information of the area 20 that is the target of dose rate distribution management. The mesh map 30 is divided by the mesh 31 as a unit, and includes coordinate data 25 of the entire area which is guided based on the positioning data 26.
The mesh map 30 created imitating the plurality of areas 20 is data-stored in the storage unit 16, and one of them is displayed on the display unit 55 based on the operation of the operator.
Then, as shown in FIG. 3A, the color tone of each mesh 31 is changed and displayed according to the dose rate at the corresponding area position.

  Further, the area 20 may be provided with a position calibrating unit 35 (FIG. 2A) for calibrating the positioning data 26 output from the position measuring unit 22. The position calibrating unit 35 moves the work. Only when the member 21 approaches, it establishes communication with the attached positioning device 22 and calibrates the position information of the positioning data 26. Such communication is performed in a relatively close range such as RFID or BLE Beacon. A communication method suitable for the distance can be applied.

  In a positioning method such as autonomous navigation, errors may accumulate over time and the position information of the positioning data 26 may deviate from the true value. In this case, the position information of the positioning data 26 can be maintained with high accuracy by arranging the position calibrating means 35 at a position where the workers 21 in the area 20 frequently come and go.

Further, a fixed dosimeter 36 may be arranged in the area 20.
The mesh map 30 is not limited to the two-dimensional bird's-eye view as shown in FIG. 3, and an aerial photograph or a three-dimensional model may be used.

Returning to FIG. 1, the description will be continued. The monitoring device 10 is arranged outside the area 20.
The data receiving unit 11 receives the positioning data 26 and the dose rate data 27 transmitted from the worker 21 moving in the area 20. Note that the number of workers 21 moving in the area 20 is not limited to one, and a plurality of workers 21 may move to different positions.
Therefore, the data receiving unit 11 adopts a known receiving method so that the correspondence between the positioning data 26 and the dose rate data 27 transmitted from the same worker 21 is not confused with the correspondence of other workers 21.

The coordinate data calculation unit 12 calculates the corresponding coordinates of the positioning data 26 received sequentially on the mesh map 30.
FIG. 2 (B) virtually shows the coordinates 32 calculated from the received positioning data 26 on the mesh 31. The connection of the coordinates 32 forms the walking locus 33 of the worker 21.

The mesh determination unit 17 determines the corresponding mesh 31 based on the coordinates 32 of the mesh map calculated by the calculation unit 12, and outputs the address data 28 thereof.
Here, as shown in FIG. 2 (B), the coordinates (x _1, y _2), the coordinates (x _2, y ₁₎ when setting the coordinates satisfy the following equation _{(1) (x m, y} m) Are determined to belong to the mesh 31a.
_{x 1 ≦ x m ≦ x 2} || y 1 ≦ y m ≦ y 2 (1)

The correction unit 13 derives time differential information from the time series of the dose rate data 27 received so far, and corrects the value of the dose rate data 27 using the time constant τ of the delay of the response peculiar to the dosimeter 23.
As represented by the following equation (2), the dose rate data D detected by the dosimeter 23 with the time constant τ is accompanied by a transient change due to a response delay. Here, D _max represents a value (steady value) when the dose rate data 27 settles in a steady state, and t represents time.
D = D _max × (1−e ^{−t / τ} ) (2)

Then, using Equation (3) obtained by differentiating both sides of Equation (2) by t, the steady value can be derived from the dose rate data 27 detected in the transient state.
dD / dt = D _max × e ^{−t / τ} / τ (3)

The correction unit 13 causes the virtual dosimeter 23, which is considered to have a time constant of zero or a minimum value, to detect the dose rate data 27 without a transient change. This makes it possible to accurately detect the dose rate data 27 even when the worker 21 moves at high speed in the area 20 where the dose rate distribution has a large inclination.
The correction unit 13 is not an essential component, and can be omitted if the response delay of the dose rate detection by the dosimeter 23 described above does not matter.

The data holding unit 18 sequentially holds the address data 28 output from the determination unit 17 and the dose rate data 27 output from the data receiving unit 11 or the correction unit 13 in association with the corresponding time data 29.
The time data acquired by the time data acquisition unit 15 is issued from an internal timer (not shown) based on the timing when the positioning data 26 and the dose rate data 27 are received by the reception unit 11. Alternatively, the time data added to the positioning data 26 and the dose rate data 27 when transmitted from the data transmitting unit 24 can be used.

The data extraction unit 41 extracts, from the association data of the mesh address data 28, the dose rate data 27, and the time data 29 held in the holding unit 18, the time data 29 within the designated period 44. Is.
The designated period 44 is set by the operator from the input unit 42, and the lower and upper limits thereof are arbitrarily set in the range from the oldest to the latest time data 29 held in the holding unit 18. Can be set.

Alternatively, the designated period 44 can be set from the current time to a time past a fixed period (for example, 60 hours). That is, the designated period 44 is set such that the upper limit is set to the current time and the lower limit is also changed so that the difference period from the upper limit is constant.
In this way, the specified period 44 is defined as a certain period in the past from the current time, so that the dose rate data 27 detected in the past far from the specified period 44 is not reflected in the expression (color tone) of the mesh 31. become.

In an environment where the dose rate changes moment by moment, it is highly possible that the dose rate data 27 detected in the past over a certain period does not reflect the current situation, and by excluding such old data, the dose rate The reliability of distribution monitoring can be improved.
When the dose rate of the environment does not seem to change, the reliability of monitoring the dose rate distribution can be improved by making the designated period 44 sufficiently long.

The mesh allocating unit 43 sorts the association data of the address data 28, the dose rate data 27, and the time data 29 extracted by the data extracting unit 41 using the address data 28 as a key and allocates it to the corresponding mesh 31. The mesh 31 that does not have the associated dose rate data 27 is treated as a blank.
Even if the mesh 31 is treated as blank at a certain point, it is treated as non-blank when the dose rate data 27 is received and associated thereafter. On the contrary, even if the mesh 31 is treated as non-blank at a certain point in time, if the association of the corresponding dose rate data 27 is lost in the designated period 44 thereafter, it is treated as blank.

  The average calculator 51 is for averaging the numerical value information of the dose rate data 27 assigned to each mesh 31 in the mesh assigner 43. Thereby, when a plurality of dose rate data 27 are recorded in the mesh 31 of interest in the designated period 44, the average value of these dose rate data 27 is reflected in the expression (color tone) of this mesh 31.

By the way, even if the dose rate data 27 is detected in a certain past period from the current time, the certainty of the dose rate data 27 decreases as time passes from the present.
For this reason, when a plurality of dose rate data 27 is associated with the mesh 31, it may not be preferable from the viewpoint of reliability of monitoring of the dose rate distribution to treat all data having different probabilities equally.

Therefore, the weight coefficient setting unit 45 weights the highly reliable dose rate data 27 to increase the degree of influence in the subsequent average calculation.
The weighting rule can be defined by the second defining unit 47 based on the speed and the third defining unit 48 based on the calibration time, in addition to the first defining unit 46 based on the elapsed time described above.

  The first defining unit 46 uses time data corresponding to each of the plurality of dose rate data 27 linked to the mesh 31 for weighting. That is, the weighting coefficient based on the elapsed time from each time data to the current time is given to each of the corresponding plurality of dose rate data, and then the average calculation is executed.

Specifically, a method of using the reciprocal of the elapsed time as a weighting coefficient, a method of using a weighting coefficient set in a stepwise manner according to the elapsed time, and the like are mentioned, but there is no particular limitation.
The weighting factor defined by the first defining unit 46 is set according to a rule that is set to be larger as the dose rate data 27 having a shorter elapsed time after being detected in the area 20 (that is, newer), according to a rule. The method is not particularly limited.
As a result, it is possible to reduce the contribution of the dose rate data 27, the uncertainty of which increases with the passage of time, to the averaging operation, and to accurately monitor the air dose rate distribution that changes from moment to moment.

  The second defining unit 47 uses the speed information of the worker derived from the positioning data 26 and time data corresponding to each of the plurality of dose rate data 27 linked to the mesh 31 for weighting. That is, the weighting coefficient based on the velocity information obtained by differentiating the time-series positioning data 26 with respect to the time data is given to each of the corresponding plurality of dose rate data, and then the average calculation is executed.

The rule in the second defining unit 47 takes into consideration the influence of the time constant τ of the response delay of the dosimeter 23 described above. That is, the time constant τ of the dosimeter 23 is about several seconds to ten and several seconds, and when the worker 21 passes in the vicinity of a local high dose area, the average calculation of the dose rate data 27 that cannot reach the steady value. Reduce its contribution to. On the contrary, the contribution of the dose rate data 27 reaching the steady value to the averaging is improved.
The method of deriving the speed information of the worker 21 used in the second defining unit 47 is not particularly limited and may be measured.

  The weighting factor defined by the second defining unit 47 is set to a large value because the dose rate data 27 with slower corresponding velocity information has higher reliability. Conversely, the faster the speed information, the smaller the speed information is set. Specifically, a method of using the reciprocal of the speed as a weighting coefficient, a method of using a weighting coefficient set stepwise according to the speed, and the like, are not particularly limited.

  The third defining unit 48 uses the elapsed time from the calibration time of the positioning meter 22 by the position calibration means 35 installed in the area 20 (see FIG. 2) for weighting. That is, the weighting factor based on the elapsed time from the calibration execution time to the current time is given to each of the corresponding plurality of dose rate data, and then the average calculation is executed.

The weighting factor defined by the third defining unit 48 is set to a large value because the reliability is higher as the elapsed time from the calibration is shorter. Conversely, the longer the elapsed time, the smaller the setting. Specifically, a method of using the reciprocal of the elapsed time as a weighting coefficient, a method of using a weighting coefficient set in a stepwise manner according to the elapsed time, and the like are mentioned, but there is no particular limitation.
When operating the third stipulation unit 48, it is necessary to transmit the data of the calibration time of the position finder 22 by the position calibrating unit 35 to the data receiving unit 11.

The interpolation calculation unit 52 is a process performed for the mesh 31 to which the corresponding dose rate data 27 is not associated during the designated period 44. With respect to such a mesh 31 that is originally treated as a blank, numerical value information can be obtained by interpolation calculation using the dose rate data 27 corresponding to a plurality of adjacent meshes and reflected in the expression (color tone). it can.
For such interpolation calculation, a general method such as two-dimensional spline interpolation or contour line drawing method can be applied.
Note interpolation operation unit 52 is not an essential element, to directly blank displayed to the mesh 31 there is no linking is Ru unnecessary der.

  The number counting unit 53 outputs number information that counts the number of dose rate data assigned to each mesh 31 within the designated period 44. The number information is reflected on the mesh 31 (FIG. 3 (A)) by displaying numbers. Alternatively, the mesh 31 may be reflected by a color tone corresponding to the number information.

Here, the number information of the dose rate data assigned to each mesh 31 corresponds to the staying time of the worker 21 in the corresponding mesh 31. Therefore, the exposure dose of the worker 21 can be estimated by multiplying the number information by the dose rate data 27.
Further, the mesh 31 having a large number of pieces of information indicates that the frequency of passage of the worker 21 is high. Thereby, the priority point of the decontamination / shielding measures in the area 20 for reducing the exposure of the worker 21 becomes clear.

  The map generation unit 54 represents the non-blank mesh 31 with a color tone that reflects the numerical information of the dose rate data 27 held within the designated period 44, and further displays the number information aggregated by the number aggregation unit 53. To reflect. Further, the blank mesh 31 is expressed by a color tone that reflects the numerical information derived by the interpolation calculation unit 52. As described above, all the meshes 31 are represented by the color tones, so that the mesh map 30 representing the dose rate distribution of the area 20 is displayed on the display unit 55.

The map generation unit 54 can use the numerical information obtained by averaging at least one of the first defining unit 46, the second defining unit 47, and the third defining unit 48 in setting the weighting factor. Alternatively, it is also possible to use numerical information obtained by averaging all dose rate data 27 associated with the mesh 31 and averaging them without setting weighting factors.
Furthermore, the latest dose rate data 27 or the dose rate data 27 showing the maximum value is represented from among the plurality of dose rate data 27 linked to the mesh 31 without operating the averaging unit 51. , Numerical information of the corresponding mesh 31 can also be used. In this case, the map may be overwritten as soon as new data is obtained, and the time data corresponding to each dose rate data 27 may not be stored.

  The map generation unit 54 may display the blank mesh 31 as it is as a blank without operating the interpolation calculation unit 52. The number counting unit 53 may not be operated, and the number information may not be added to the mesh 31.

In the mesh map 30 of FIG. 3B, an index 38 that represents the dose rate in the mesh 31b of interest in different directions is shown.
As described above, in order to distinguish the directions and represent the dose rate distribution, the positioning data 26 needs to include the data for guiding the direction information of the dosimeter 23 in addition to the coordinate data.
Then, the data holding unit 18 sequentially holds the direction information in addition to the address data 28 and the time data 29 of the mesh 31 in association with the dose rate data 27.
Further, the mesh allocating unit 43 sorts the association data of the direction information, the address data 28, the dose rate data 27, and the time data 29 using the direction information and the address data 28 as keys, and allocates the associated data to the index 38 of the corresponding mesh 31.

Then, the map generation unit 54 is provided with a unit (not shown) that displays an index 38 that distinguishes at least two directions (four directions in the drawing) based on this direction information for the specified mesh 31b.
Further, in order to guide the direction information of the dosimeter 23, the positioning meter 22 is specifically incorporated with an electronic compass and a gyro sensor.

When the dosimeter 23 is attached to the body of the worker 21 for measurement, since the human body serves as a radiation shield, the measured value of the dose rate data 27 changes depending on the orientation of the body.
Therefore, the directions of the dosimeter 23 are distinguished, and the dose rate data 27 is aggregated for each direction.
The index 38 indicates the radiation measurement direction, and the color tone represents the dose rate measured in that direction. Although the index 38 indicating the four directions is described for convenience in the drawing, it is also possible to increase the number to improve the directional resolution, or to draw in a pie chart shape for continuous display. As the color tone of the mesh 31b, the highest value of the dose rates in each direction of the index 38 may be adopted, or the average value of the dose rates of all the indexes 38 may be adopted.

In the above description, as the dose rate data 27, the embodiment in which the dosimeter 23 attached to the worker 21 transmits is used, but the dosimeter 36 fixed in the area 20 (see FIG. )) Is also available. In this case, the positioning data 26 of the dosimeter 36 which is fixedly arranged does not need to be transmitted and received because it is fixed and known.
The dose rate data 27 derived from the fixedly placed dosimeter 36 is reflected in the expression (color tone) of the mesh 31 at the corresponding position and can always be treated as non-blank.
As a result, the non-blank mesh 31 is stably secured even when the number of traffic of the workers 21 is reduced, and the reliability of monitoring the dose rate distribution can be improved.

The steps of the method for monitoring the air dose rate distribution according to the embodiment and the algorithm of the monitoring program thereof will be described based on the flowchart of FIG. 4 (see FIG. 1 as appropriate).
The positioning data 26 and the dose rate data 27 transmitted from each of the positioning meter 22 and the dosimeter 23 attached to the worker 21 moving in the area 20 are received (S11).

The coordinate data 25 of the area 20 is calculated from the received positioning data 26 (S12). The address data 28 of the mesh 31 corresponding to the coordinate data 25 is acquired from the mesh map 30 stored as data (S13).
The address data of the mesh, the corresponding dose rate data 27 and the corresponding time data 29 are associated with each other (S14) and stored in the data storage unit 18 (S15).

Of the data held in the data holding unit 18, the time data 29 is referenced to extract the associated data within the designated period 44 (S16).
From the extracted related data, the address data is referred to, and the mesh 31 that is not associated with the dose rate data 27 is regarded as a blank (S17 No). When a plurality of dose rate data 27 are associated with the non-blank mesh 31 (S17 Yes, S18 Yes), a weighting factor is set for each dose rate data 27 (S19).

  Then, the plurality of dose rate data 27 to which the weighting factors have been added are averaged to determine the numerical information of the corresponding mesh 31 (S20). When a single dose rate data 27 is associated with the non-blank mesh 31 (No in S17), the numerical information of the corresponding mesh 31 is determined without the need for averaging (S20).

On the other hand, the mesh 31 treated as a blank can determine the corresponding numerical information by interpolation calculation based on the numerical information of the surrounding non-blank mesh 31 (S21). The mesh map 30 in which the color tone of each mesh 31 is set corresponding to the numerical information is displayed (S22).
Then, until the monitoring is completed (No in S23), the flow of (S16) to (S23) is repeated every time the display of the mesh map 30 is updated in consideration of the newly held association data. Yes No).

According to the air dose rate distribution monitoring apparatus of at least one embodiment described above, the mesh map created based on the positioning data and the dose rate data transmitted from the worker moving in the area is sequentially updated. As a result, it is possible to provide a technique for highly reliably monitoring the air dose rate distribution that changes from moment to moment in a wide area.
Further, the components of the device for monitoring the air dose rate distribution can be realized by a processor of a computer, and can be operated by a program for monitoring the air dose rate distribution.

Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, changes, and combinations can be made without departing from the spirit of the invention. The embodiments and their modifications are included in the scope of the invention and the scope thereof, and are included in the invention described in the claims and the scope of equivalents thereof.
For example, although the embodiment has been described as using a mesh map, the dose rate is calculated for each room on the floor map (that is, not divided at equal intervals like a mesh, but separated by walls or the like. A method of visualizing each area at intervals), a method of displaying a map by calculating a dose rate in dot units when displaying an image of the map, and the like may be used.

  The air dose rate distribution monitoring device 10 described above is a control device in which a processor such as a dedicated chip, an FPGA (Field Programmable Gate Array), a GPU (Graphics Processing Unit), or a CPU (Central Processing Unit) is highly integrated. A storage device such as a ROM (Read Only Memory) or a RAM (Random Access Memory); an external storage device such as an HDD (Hard Disk Drive) or an SSD (Solid State Drive); a display device such as a display; It is equipped with an input device such as a keyboard and a communication I / F, and can be realized by a hardware configuration using a normal computer.

  The program executed by the air dose rate distribution monitoring device 10 is provided by being pre-installed in a ROM or the like. Alternatively, this program is provided as an installable or executable file stored in a computer-readable storage medium such as a CD-ROM, a CD-R, a memory card, a DVD, and a flexible disk (FD). You may do so.

The program executed by the air dose rate distribution monitoring device 10 according to the present embodiment may be stored in a computer connected to a network such as the Internet, and may be provided by being downloaded via the network.
The device 10 can also be configured by combining different modules that independently exhibit the respective functions of the constituent elements with each other through a network or a dedicated line and combining them.

  10 ... Air dose rate distribution monitoring device, 11 ... Data receiving unit, 12 ... Coordinate data calculation unit (calculation unit), 13 ... Dose rate data correction unit (correction unit), 15 ... Time data acquisition unit (correction unit), 16 ... Mesh map storage unit (storage unit), 17 ... Mesh determination unit (determination unit), 18 ... Association data storage unit (storage unit), 20 ... Area, 21 ... Worker, 22 ... Positioning device, 23 ... Dosimeter , 24 ... Data transmission unit, 25 ... Coordinate data, 26 ... Positioning data, 27 ... Dose rate data, 28 ... Address data, 29 ... Time data, 30 ... Mesh map, 31, 31a, 31b ... Mesh, 32 ... Coordinates, 33 ... Walking locus, 35 ... Position calibration means, 36 ... Dosimeter, 38 ... Index, 41 ... Data extraction section, 42 ... Input section, 43 ... Mesh allocation section, 44 ... Designated period, 45 ... Weighting coefficient setting section, 6 ... first specified portion, 47 ... second specified portion, 48 ... third defining portion, 51 ... average computing unit, 52 ... interpolation operation unit, 53 ... number counting unit, 54 ... map generation unit, 55 ... display unit.

Claims (17)

A data receiving unit that receives the positioning data and the dose rate data transmitted from each of the positioning meter and the dosimeter attached to the worker who moves in the area,
A computing unit for computing coordinate data of the area based on the positioning data,
A data holding unit that holds the coordinate data and the corresponding dose rate data in association with each other;
A map generation unit that generates a map reflecting the numerical information of the dose rate data held within a designated period based on the coordinate data;
A storage unit for storing data of a mesh map that divides the area in units of meshes,
The data holding unit holds address data of the corresponding mesh instead of the coordinate data in association with the corresponding dose rate data,
The expression of the mesh, in which a plurality of the dose rate data corresponding to the designated period are held, reflects numerical information that is averaged from the plurality of dose rate data,
The average calculation is performed after assigning a weighting factor based on speed information of the worker derived from the positioning data to each of the plurality of dose rate data. Monitoring equipment. A data receiving unit that receives the positioning data and the dose rate data transmitted from each of the positioning meter and the dosimeter attached to the worker who moves in the area,
A computing unit for computing coordinate data of the area based on the positioning data,
A data holding unit that holds the coordinate data and the corresponding dose rate data in association with each other;
A map generation unit that generates a map reflecting the numerical information of the dose rate data held within a designated period based on the coordinate data;
A storage unit for storing data of a mesh map that divides the area in units of meshes,
The data holding unit holds address data of the corresponding mesh instead of the coordinate data in association with the corresponding dose rate data,
The expression of the mesh in which a plurality of the dose rate data corresponding to the specified period is held reflects numerical value information that is averaged from the plurality of dose rate data,
The averaging operation is executed after assigning a weighting factor to each of the plurality of dose rate data based on the elapsed time from the calibration time of the positioning meter by the position calibrating means installed in the area. Characteristic air dose rate distribution monitoring device. A data receiving unit that receives the positioning data and the dose rate data transmitted from each of the positioning meter and the dosimeter attached to the worker who moves in the area,
A computing unit for computing coordinate data of the area based on the positioning data,
A data holding unit that holds the coordinate data and the corresponding dose rate data in association with each other;
A map generation unit that generates a map reflecting the numerical information of the dose rate data held within a designated period based on the coordinate data;
A storage unit for storing data of a mesh map that divides the area in units of meshes,
The data holding unit holds address data of the corresponding mesh instead of the coordinate data in association with the corresponding dose rate data,
The positioning data includes, in addition to the coordinate data, data for guiding direction information of the dosimeter,
The air dose rate distribution monitoring device is characterized in that the mesh constituting the mesh map reflects at least two directions based on the direction information and reflects the numerical information of the dose rate data. The monitoring device for air dose rate distribution according to any one of claims 1 to 3,
The data holding unit holds time data corresponding to the dose rate data in association with each other, and holds the data. The monitoring device for air dose rate distribution according to any one of claims 1 to 4,
The expression of the mesh in which the dose rate data corresponding to the specified period is not held is
A spatial dose rate distribution monitoring device, wherein numerical value information interpolated based on the dose rate data corresponding to adjacent meshes is reflected. In the monitoring device for air dose rate distribution according to claim 1 or 2,
The data holding unit holds time data corresponding to the dose rate data in association with each other,
The air dose rate distribution monitoring device, wherein the averaging operation is executed after assigning a weighting factor based on the elapsed time from the corresponding time data to each of the plurality of dose rate data. The monitoring device for air dose rate distribution according to any one of claims 1 to 6,
The air dose rate distribution monitoring device, wherein the mesh constituting the mesh map further reflects the number information of the corresponding dose rate data. In the monitoring device for air dose rate distribution according to any one of claims 1 to 7,
A device for monitoring an air dose rate distribution, which also receives dose rate data transmitted from a dosimeter fixedly arranged in the area and reflects the numerical information in the expression of the corresponding mesh. In the device for monitoring the air dose rate distribution according to any one of claims 1 to 8,
A device for monitoring the spatial dose rate distribution, which employs means for calculating the dose rate in dot units when displaying the image in place of the mesh map and displaying the map. Receiving positioning data and dose rate data transmitted from each of the position measuring instrument and the dosimeter attached to the worker moving in the area,
Calculating coordinate data of the area based on the positioning data,
Holding the coordinate data and the corresponding dose rate data in association with each other;
Generating a map reflecting the numerical information of the dose rate data held within a designated period based on the coordinate data;
Storing data of a mesh map that divides the area in units of meshes,
In the step of retaining, the address data of the corresponding mesh instead of the coordinate data is retained in association with the corresponding dose rate data,
The expression of the mesh in which a plurality of the dose rate data corresponding to the specified period is held reflects numerical value information that is averaged from the plurality of dose rate data,
The average calculation is performed after assigning a weighting factor based on speed information of the worker derived from the positioning data to each of the plurality of dose rate data. Monitoring method. Receiving positioning data and dose rate data transmitted from each of the position measuring instrument and the dosimeter attached to the worker moving in the area,
Calculating coordinate data of the area based on the positioning data,
Holding the coordinate data and the corresponding dose rate data in association with each other;
Generating a map reflecting the numerical information of the dose rate data held within a designated period based on the coordinate data;
Storing data of a mesh map that divides the area in units of meshes,
In the step of retaining, the address data of the corresponding mesh instead of the coordinate data is retained in association with the corresponding dose rate data,
The expression of the mesh in which a plurality of the dose rate data corresponding to the specified period is held reflects numerical value information that is averaged from the plurality of dose rate data,
The averaging operation is executed after assigning a weighting factor to each of the plurality of dose rate data based on the elapsed time from the calibration time of the positioning meter by the position calibrating means installed in the area. A characteristic method of monitoring the air dose rate distribution. Receiving positioning data and dose rate data transmitted from each of the position measuring instrument and the dosimeter attached to the worker moving in the area,
Calculating coordinate data of the area based on the positioning data,
Holding the coordinate data and the corresponding dose rate data in association with each other;
Generating a map reflecting the numerical information of the dose rate data held within a designated period based on the coordinate data;
Storing data of a mesh map that divides the area in units of meshes,
In the step of retaining, the address data of the corresponding mesh instead of the coordinate data is retained in association with the corresponding dose rate data,
The positioning data includes, in addition to the coordinate data, data for guiding direction information of the dosimeter,
A method for monitoring an air dose rate distribution, wherein the mesh constituting the mesh map reflects at least two directions based on the direction information and reflects the numerical information of the dose rate data. The method for monitoring the air dose rate distribution according to any one of claims 10 to 12,
A method for monitoring the spatial dose rate distribution, wherein means for calculating the dose rate in dot units when displaying the image in place of the mesh map and displaying the map is adopted. On the computer,
A function of receiving the positioning data and the dose rate data transmitted from each of the positioning meter and the dosimeter attached to the worker moving in the area,
A function of calculating coordinate data of the area based on the positioning data,
A function of associating and holding the coordinate data and the corresponding dose rate data,
A function for generating a map reflecting the numerical information of the dose rate data held within a designated period based on the coordinate data,
Implement a function to save the mesh map data that divides the area in units of mesh,
The function of holding, the address data of the corresponding mesh in place of the coordinate data, is held in association with the corresponding dose rate data,
The expression of the mesh, in which a plurality of the dose rate data corresponding to the designated period are held, reflects numerical information that is averaged from the plurality of dose rate data,
The average calculation is performed after assigning a weighting factor based on the velocity information of the worker derived from the positioning data to each of the plurality of dose rate data, which is a spatial dose rate distribution. Surveillance program. On the computer,
A function of receiving the positioning data and the dose rate data transmitted from each of the positioning meter and the dosimeter attached to the worker moving in the area,
A function of calculating coordinate data of the area based on the positioning data,
A function of associating and holding the coordinate data and the corresponding dose rate data,
A function of generating a map reflecting the numerical information of the dose rate data held within the designated period based on the coordinate data,
Implement a function to save the mesh map data that divides the area in units of mesh,
The function of holding, the address data of the corresponding mesh in place of the coordinate data, is held in association with the corresponding dose rate data,
The expression of the mesh in which a plurality of the dose rate data corresponding to the specified period is held reflects numerical value information that is averaged from the plurality of dose rate data,
The averaging operation is executed after assigning a weighting factor to each of the plurality of dose rate data based on the elapsed time from the calibration time of the positioning meter by the position calibrating means installed in the area. A program for monitoring the characteristic air dose rate distribution. On the computer,
A function of receiving the positioning data and the dose rate data transmitted from each of the positioning meter and the dosimeter attached to the worker moving in the area,
A function of calculating coordinate data of the area based on the positioning data,
A function of associating and holding the coordinate data and the corresponding dose rate data,
A function of generating a map reflecting the numerical information of the dose rate data held within the designated period based on the coordinate data,
Implement a function to save the mesh map data that divides the area in units of mesh,
The function of holding, the address data of the corresponding mesh in place of the coordinate data, is held in association with the corresponding dose rate data,
The positioning data includes, in addition to the coordinate data, data for guiding direction information of the dosimeter,
A program for monitoring an air dose rate distribution, wherein the mesh forming the mesh map reflects at least two directions based on the direction information and reflects the numerical information of the dose rate data. In the monitoring program of the air dose rate distribution according to any one of claims 14 to 16,
A program for monitoring the spatial dose rate distribution, which employs means for calculating the dose rate in dot units when displaying the image in place of the mesh map and displaying the map.

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