JP2008209256A - Contamination management system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a system capable of managing entrance and exit operations for a hazardous contamination area. <P>SOLUTION: A contamination management system has an opening/closing gate apparatus that includes an IC card for recording an accumulated amount of contamination and an entrance clock time; a memory for storing the amount of unit contamination and the amount of contamination limit; an entrance time recording means for recording the entrance clock time on the IC card; a stay period calculating means which reads the entrance clock time from the IC card and calculates the stay period, by subtracting it from the current clock time; a contamination amount calculating means which multiplies the stay period by the amount of unit contamination, thereby calculating the contamination amount; an update accumulated amount returning means which reads the accumulated amount of contamination from the IC card, adds it to the contamination amount, produces an updating accumulated amount of contamination and returns it; a determining means which compares the updated accumulated amount of contamination with the amount of contamination limit and determines whether the updated accumulated amount of contamination exceeds the amount of contamination limit; and a warning information issuing means which issues warning information, when the accumulated amount of contamination exceeds the amount of contamination limit. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a system for managing a contamination state exposed to a hazardous substance for a visitor to a contaminated area (for example, a radioactive substance contaminated facility or a hazardous substance storage).

Traditionally, when engineers and workers enter and leave areas where radiation and toxic substances exist, the amount of radiation exposure and the accumulated exposure time to toxic substances are managed to prevent health hazards. Yes.

For example, in Patent Document 1, in a facility that handles radiation (for example, a reactor demolition place), an operator carries a personal dosimeter equipped with a radiation sensor, measures the amount of exposure, and manages this measurement information. A technique for centralized management by transmitting to the network is disclosed.
JP 2004-117372 A (paragraph 0027 to paragraph 0030, FIG. 1)

By the way, in the technique of patent document 1, there existed a problem that the amount of exposure could not be measured if the operator had not carried the radiation sensor in the facility.
In addition, there is a drawback that it is possible to urge the worker who exceeds the allowable limit to leave, or when this worker tries to re-enter the facility, entry cannot be prevented.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a system capable of managing entry / exit of a hazardous contamination area.

The present invention solves the above problems by the following means. That is, the invention of claim 1 is a pollution control system using an IC card (100) and an opening / closing gate device (300),
The IC card (100) is an IC card for recording at least a cumulative contamination amount (191) and an entrance time (193), and the opening / closing gate device (300) includes at least a unit contamination amount (395) and a contamination limit. A memory for storing the amount (393), an entry time recording means (310) for recording the entry time (193) on the IC card (100), and reading the entry time (193) from the IC card (100) A stay time calculation means (310) for subtracting from the time to calculate the stay time, a contamination amount calculation means (320) for calculating the pollution amount by integrating the stay time and the unit pollution amount (395), and an IC card ( 100), the accumulated cumulative amount (191) is read, and the accumulated amount is added, and the updated accumulated amount reply unit (330) for creating and returning the updated accumulated cumulative amount (191); A determination means (340) for comparing the new contamination accumulation amount (191) and the contamination limit amount (393) to determine whether or not the contamination accumulation amount exceeds the limit amount, and the contamination accumulation amount is the limit amount And a warning information issuing means (350) for issuing warning information when the threshold is exceeded.

According to the present invention,
(1) When entering a contaminated area, the amount of contamination can be measured without carrying a contamination sensor.
(2) It is possible to prohibit re-entry into the contaminated area for workers who exceed the allowable limit of contamination.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the drawings.

FIG. 1 is a diagram illustrating an outline of a pollution management system 1 according to the present invention. The contamination management system 1 according to the present invention includes an IC card 100 and an opening / closing gate device 300. The contamination management system 1 manages entry / exit of the IC card 100 into / from an area managed by the opening / closing gate device 300 (= management area).

The gate device 300 manages entry / exit of the management area 500. The gate device 300 is a facility controlled by a computer program. The gate device 300 includes an IC card reader / writer.

The IC card 100 is a contact type or non-contact type card medium. The IC card 100 holds information used for contamination management.

The management area 500 is, for example, a contaminated facility or a hazardous substance storage. The management area 500 in FIG. 1 includes a management area A 500a (= a slightly contaminated room), a management area B 500b (= a moderately contaminated room), a (management area C 500c (= a highly contaminated room), and the like. It is configured.

The opening / closing gate device A300a (opening / closing gate specifying information = “gate A”) manages entry / exit of the IC card 100 into / from the management area A500a. Similarly, the gate device B300b manages entry / exit to the management area B500b, and the gate device C300c manages entry / exit to the management area C500c.

FIG. 2 is a detailed configuration diagram of the IC card. FIG. 2 is a detailed configuration diagram of the IC card 100. The IC card 100 includes a CPU 101, a communication unit 102, and a memory 109. The CPU 101 is a dedicated microprocessor. The communication unit 102 is a connection terminal or an antenna. The connection terminal of the communication unit 102 is in contact connection with the connection terminal plate of the IC card reader / writer. The antenna of the communication unit 102 is wirelessly connected to the antenna of the IC card reader / writer. The memory 109 is a semiconductor memory. The memory 109 stores accumulated contamination amount data 191 and entry time data 193.

The IC card 100 receives the entry time data 193 from the contact-connected or wirelessly-connected IC card reader / writer and records it in the memory 109. The IC card 100 transmits the accumulated contamination amount data 191 and the entry time data 193 to the IC card reader / writer, receives the accumulated contamination amount data 191 calculated by the switching gate device, and updates the accumulated contamination amount data 191. To do.

FIG. 3 shows a format and an example of the accumulated contamination amount data 191. The item of accumulated contamination amount data 191 is composed of contaminant identification information 191a and accumulated value information 191b. The pollutant identification information 191a is pollutant name information and unit information. The accumulated value information 191b is numerical information.

FIG. 3 illustrates the accumulated contamination amount data 191. For example, the pollutant identification information 191a is exemplified by the pollutant accumulated amount data 191 in which the pollutant name information is “radiation”, the unit information is “sievert”, and the cumulative value information 191b is “vwxy”.

The pollutant identification information 191a is exemplified by the pollutant accumulated amount data 191 in which the pollutant name information is “NOx”, the unit information is “mg”, and the accumulated value information 191b is “wxyz”.

FIG. 4 is a detailed block diagram of the gate device 300 according to the present invention. The gate device 300 includes at least a CPU 301, an IC card reader / writer 302, an opening / closing door 303, a memory 309, and a dedicated application program.

The memory 309 stores limit amount data 393 and unit contamination amount data 395.

The CPU 301 is a microprocessor. The IC card reader / writer 302 includes a connection terminal plate or an antenna coil. The memory 309 is a semiconductor memory or a magnetic memory.

The dedicated application program is a computer program that is processed by the CPU 501. The dedicated application program according to the present invention includes an entrance time recording unit 310, a contamination amount calculating unit 320, a cumulative amount updating unit 330, a determining unit 340, a warning information issuing unit 350, and an opening / closing unit 360.

The entry time recording means 310 records the entry time 193 on the IC card 100. The stay time calculating means 310 reads the entrance time 193 from the IC card 100 and subtracts it from the current time to calculate the stay time. The contamination amount calculation unit 320 calculates the contamination amount by integrating the stay time and the unit contamination amount 395. The cumulative update amount reply unit 330 reads the cumulative contamination amount 191 from the IC card 100, adds the contamination amount, and creates and returns the cumulative contamination amount 191 for update.

The determination unit 340 compares the accumulated contamination amount for update 191 and the contamination limit amount 393 to determine whether or not the accumulated contamination amount exceeds the limit amount. The warning information issuing means 350 issues warning information if the determination result indicates that the accumulated contamination amount exceeds the limit amount.

The opening / closing means 360 is unlocked if the accumulated contamination amount does not exceed the limit amount, and is locked if the accumulated contamination amount exceeds the limit amount.

FIG. 5 shows a format and an example of the limit amount data 393. The items of limit amount data 393 are composed of contaminant identification information 393a and limit value information 393b. The contaminant identification information 393a is the same as the contaminant identification information 191a of FIG. The limit value information 393b is numerical information.

FIG. 5 illustrates limit amount data 393. For example, limit amount data 393 in which the contaminant identification information 393a is “radiation”, the unit information is “sievert”, and the limit value information 191b is “zyxw” is illustrated.

FIG. 6 shows the format and example of the unit contamination amount data 395.
The item of the unit contamination amount data 395 is composed of contaminant identification information 395a and a measurement reference value 395b. The contaminant identification information 395a is the same as the contaminant identification information 191a in FIG. The reference value 395b is numerical information.

FIG. 6 illustrates unit contamination amount data 395. For example, the contaminant identification information 395a is exemplified by limit amount data 393 in which the contaminant name information is “radiation”, the unit information is “sievert”, and the reference value 395b is “wxy”.

7 and 8 are explanatory diagrams of the processing procedure of the opening / closing gate device 300. FIG.

FIG. 7 is an explanatory diagram of a processing procedure when the worker carries the IC card 100 and enters the management area A. When an operator enters the management area A while holding the IC card 100 over the gate device 300a “gate A”, the determination unit 340 reads the accumulated contamination amount data 191 from the IC card 100 and compares the contamination limit amount data 393. Then, it is determined whether or not the accumulated contamination amount exceeds the limit amount (FIG. 7 (1)).

If the accumulated amount of contamination does not exceed the limit amount, the operator is allowed to enter and the opening / closing means 360 is unlocked. The entrance time recording means 310 transmits the entrance time data 193 “12:10” to the IC card 100. The IC card 100 records the entry time data 193 “12:10” in the memory 109 ((2)).

If the accumulated amount of contamination exceeds the limit amount, entry is prohibited and the opening / closing means 360 is locked. The warning information issuing means 350 issues warning information to alert the worker ((3)).

Similarly, when the IC card 100 enters the management area B in the opening / closing gate device 300b “gate B”, if the cumulative contamination amount of the IC card 100 does not exceed the limit amount, the entrance is permitted, and the cumulative contamination amount is If the limit is exceeded, admission is prohibited. When the IC card 100 enters the management area C in the gate device 300c “gate C”, if the accumulated contamination amount of the IC card 100 does not exceed the limit amount, the admission is permitted, and the accumulated contamination amount reaches the limit amount. If it exceeds the limit, admission is prohibited.

FIG. 8 is an explanatory diagram of a processing procedure when leaving.
When the operator leaves the management area C500c while holding the IC card 100 at the gate device C300c “Gate C”, the stay time calculation means 310 reads the entrance time 193 “12:20” from the IC card 100 and the current time Subtract from “12:40” to calculate the stay time “20 minutes”. The contamination amount calculation means 320 calculates the current contamination amount by integrating the stay time “20 minutes” and the unit contamination amount 395 (FIG. 8A).

The update cumulative amount reply unit 330 reads the contamination accumulation amount 191 from the IC card 100 and adds the contamination amount calculated in FIG. 8A to calculate the contamination accumulation amount. The IC card 100 receives the accumulated contamination amount from the open / close gate device C300c, and updates the accumulated contamination amount 191 ((2)).

When the accumulated contamination amount and the limit amount are compared, and the accumulated contamination amount exceeds the limit value information, the warning information issuing means 350 issues warning information to the worker ((3)).

Regardless of whether or not the cumulative amount of contamination of the IC card 100 exceeds the limit amount, the opening / closing means 360 is unlocked. Therefore, the worker carries the IC card 100, leaves the management area C500c, and moves to the management area B500b.

Here, the current time “12:40” when leaving the management area C500c becomes the entry time 193 “12:40” when entering the management area B500b.

Note that the worker who has left the management area C500c enters the management area B500b, but the accumulated contamination amount exceeds the limit amount. Similarly, when the card is held over the opening / closing gate device B300b, warning information is issued. And unlocked. The worker leaves the management area B500b and moves to the management area A500a. Similarly, since the accumulated amount of contamination of the IC card 100 exceeds the limit amount, when an operator holds the IC card 100 over the opening / closing gate device A300a, warning information is issued, unlocked, and exited from the management area A500a. To do.

As described above, when the worker carries the IC card 100 and leaves the management area 500, the switching gate device 300 issues warning information when the cumulative amount of contamination of the IC card 100 exceeds the limit amount. Since the operator is alerted and unlocked, it is possible to reliably leave.

(Example 1)
Next, an example in which the contamination concentration information in the management area 500 is measured and the contamination amount in the management area 500 is calculated will be described.

FIG. 9 is a detailed configuration diagram of the opening / closing gate device 300 including the contamination sensor 304. The gate device 300 includes a contamination sensor 304 and the hardware shown in FIG. The contamination sensor 304 measures the amount of contamination in the management area 500.

The memory 309 stores unit contamination amount transition data 397 and limit amount data 393. The positional contamination amount transition data 397 is data in which the measurement time information is associated with the measurement reference value. The limit amount data 393 is the same as the limit amount data 393 in FIG.

The dedicated application program includes unit contamination amount data calculation means 370 and the means shown in FIG. The unit contamination amount transition data creation unit 370 reads the value of the contamination amount measured by the contamination sensor 304, uses this as a measurement reference value, and creates unit contamination amount transition data by associating the measurement reference value with the measurement time. The contamination amount calculation means 320 calculates the contamination amount by integrating the measurement reference value in the corresponding time range using the unit contamination amount transition data 397, the entry time data 193, and the current time.

FIG. 10 shows a format and an example of the unit contamination amount transition data 397. The item of the unit contamination amount transition data 397 includes contaminant identification information 397a, measurement time information 397b, and a measurement reference value 397c. The measurement time information 397b and the measurement reference value 397c are associated with each other. As many pairs as the measurement time information 397b and the measurement reference value 397c are measured. The contaminant identification information 397a is the same as the contaminant identification information 395a of FIG. The measurement time information 397b is a date and time. The measurement reference value 397c is the same as the reference value 395b in FIG.

FIG. 10 illustrates unit contamination amount transition data 397. For example, the contaminant identification information 397a is “radiation”, the unit information is “sievert”, and the pair of the measurement time information 397b and the measurement reference value 397c is “2007/02/01/09: 30” and “xyzyzx”. Unit pollution amount transition data 397 such as a pair of “2007/02/01/10: 30” and “vzvyvx” is illustrated.

FIG. 11 is an explanatory diagram for calculating the contamination amount. FIG. 11A is a bar graph of unit contamination amount transition data with the vertical axis representing the measurement reference value and the horizontal axis representing the time. (B) of FIG. 11 shows that the area of the bar graph corresponds to the current contamination amount when the entrance time data 193 is “9:30” and the exit time is “12:30”. .

Next, a modified example will be described.
(Modification 1)
The warning information may be transmitted to a predetermined destination using electronic mail.

(Modification 2)
When entering the management area, the accumulated amount of contamination and the unit contamination amount may be used to predict the time for reaching the limit amount and notify the stayable time.

As explained in detail above, according to the present invention,
(1) When entering a contaminated area, it becomes possible to measure the amount of contamination without carrying a contamination sensor.
(2) It has become possible to prohibit re-entry into the contaminated area for workers who have exceeded the allowable limit of contamination.

Pollution control system according to the present invention Detailed configuration diagram of IC card Accumulated contamination data 191 Detailed configuration diagram of the gate device according to the present invention Limit amount data 393 Unit pollution data 395 Explanatory diagram of processing procedure when entering Explanatory diagram of processing procedure when leaving Detailed configuration diagram of the open / close gate device 300 including the contamination sensor 304 Format and example of unit pollution data transition data 397 Illustration of pollution amount calculation

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Contamination management system 100 IC card 191 Accumulated contamination amount 193 Entrance time 300 Switching gate device 310 Stay time calculation means 320 Contamination amount calculation means 330 Update cumulative amount reply means 340 Determination means 350 Warning information issue means 370 Unit contamination amount transition data creation Means 393 Contamination limit amount 395 Unit contamination amount 500 Control region

Claims (1)

A pollution control system using an IC card and a gate device,
The IC card is
Record at least the cumulative amount of contamination and entry time,
An IC card,
The gate device is
A memory for storing at least a unit contamination amount and a contamination limit amount;
An entry time recording means for recording the entry time on the IC card;
A stay time calculating means for reading the admission time from the IC card and subtracting from the current time to calculate the stay time;
A contamination amount calculation means for calculating the amount of contamination by integrating the stay time and the unit contamination amount,
An update cumulative amount reply means for reading the cumulative contamination amount from the IC card, adding the contamination amount, and creating and returning the cumulative contamination amount for update;
A determination means for comparing the updated contamination accumulation amount and the contamination limit amount to determine whether or not the contamination accumulation amount exceeds the limit amount;
Warning information issuing means for issuing warning information when the accumulated contamination amount exceeds the limit amount,
An opening and closing gate device comprising:
A pollution control system characterized by that.

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