JPH06180365A - Gate monitor - Google Patents

Abstract

PURPOSE:To allow the indication of information concerning the availability of the vicinity of inlet and the progress of inspection by providing a control means for presenting information concerning the progress of inspection carried out in a measuring box on a display means. CONSTITUTION:A person 13 entering into a measuring box 12 is detected and an intrusion detection signal is delivered to a controller 10. The controller 10 controls the driving section of an inlet door 1 to open the door 1. When the person 13 to be measured enters through the door 1 into the box 12 and places his hands and feet at predetermined positions, they are detected 5 and detection signals are delivered to the controller 10. The controller 10 receives a signal from a radiation detector 3 and decides whether the body surface of the person 13 is contaminated. Upon determination that the body surface is not contaminated, the controller 10 controls the driving section of an outlet door 2 to open the door 2. When the person 13 leaves through the outlet of the box 12, a detection signal is delivered from a leave sensor 6 to the controller 10. The controller 10 then controls the driving section of the door 2 to close the door 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiation monitor used in a nuclear facility or the like, and more particularly to a gate monitor installed at the boundary of a radiation controlled area.

[0002]

2. Description of the Related Art Conventionally, in a nuclear facility, a gate monitor is installed at the boundary of the radiation control area provided in the facility, and when a person working in the radiation control area goes out of the radiation control area, an operator After passing through the gate monitor, the worker is inspected for body surface contamination. Particularly in a large-scale nuclear facility such as a nuclear power plant, a plurality of gate monitors are generally installed in order to avoid congestion at the gate monitors. FIG. 7 shows a configuration example of a conventional gate monitor.

As shown in the figure, in a general gate monitor, an entrance door 1 is provided at the entrance of a measurement box (not shown) having a volume equivalent to one person to be measured, and an exit door 2 is provided at the exit thereof. The radiation detector 3 is provided at the limb installation position in the box.

A person to be measured who enters the measurement box is detected by the intrusion detection sensor 4, and a person who goes out of the measurement box is detected by the exit detection sensor 6. Also, at the entrance of the measurement box, there is a first lamp 7 for displaying the word "available",
A second lamp 8 for displaying the character "Measuring" is installed. The operation of each of these components is controlled by the controller 9.

In the above gate monitor, when there is no person to be measured in the measurement box, the first lamp 7 is turned on to display the character "usable". When the intrusion detection sensor 4 detects that the person to be measured has entered the measurement box, the first lamp 7 is extinguished, and instead, the second lamp is turned on and the word "available" is displayed instead. Let The above lamp lighting timing is shown in FIG.

Therefore, the person who is going to go out from the radiation controlled area to the outside looks for a gate monitor in which the word "usable" is displayed when a plurality of gate monitors are installed side by side. Conduct body surface contamination inspection.

However, in the above-mentioned conventional gate monitor, only two indications of "available" and "measurement in progress" are displayed, so in a facility equipped with a plurality of gate monitors, all monitor gates are "measured". When "Medium" was displayed, it was not possible to determine which monitor gate was the fastest.

[0008]

As described above, since the conventional gate monitor has only two displays, "enabled" and "measurement in progress" (or a display showing the equivalent content), they are arranged side by side. However, depending on the location, a person who came later may start the measurement on another monitor first, and the person who came first may be kept waiting on the monitor lined up originally.

The present invention has been made in view of the above circumstances, and information about the progress of the body surface contamination inspection is sequentially displayed in accordance with the progress, as well as whether or not it can be used near the entrance of the measurement box. It is an object of the present invention to provide a gate monitor that can easily and easily determine which monitor will finish the inspection fastest when it is installed on a stand.

[0010]

In order to achieve the above object, the gate monitor of the present invention comprises a display means provided near the entrance of the measurement box and information on the progress of the inspection performed in the measurement box. And display control means for sequentially displaying on the display means according to the progress of the inspection process.

[0011]

In the gate monitor of the present invention constructed as described above, the display control means sequentially displays information on the progress of the inspection performed in the measurement box on the display means provided near the entrance of the measurement box. To be done. Therefore, the person to be subjected to the contamination inspection can easily judge whether the contamination inspection can be carried out immediately and the waiting can be carried out immediately by looking at the display contents of the display means.

[0012]

EXAMPLES Examples of the present invention will be described below.

FIG. 1 shows a functional block of a gate monitor according to the first embodiment of the present invention. The parts having the same configurations as those of the monitor shown in FIG.

The gate monitor of this embodiment is a control device 10.
Is configured to be able to take in each detection signal from the intrusion detection sensor 4, the hand / foot setting detection sensor 5, and the exit detection sensor 6 and control the display content of the display 11 installed at the entrance of the measurement box (not shown). .

The control device 10 has a display 11 in addition to the original function of the monitor for judging the presence or absence of body surface contamination of the person to be measured based on the radiation detection signal input from the radiation detector 3.
It has a function as a display control means for switching the display contents of.

Further, the control device 10 has a memory in which each display pattern data of P1 to P6 shown in FIG. 3A is stored in relation to the function as the display control means. The display pattern data stored in that memory is
It is read at a timing described later according to the progress of the body surface contamination inspection process, and is displayed and output on the display unit 11.

Each display pattern P1 to P shown in FIG.
Reference numeral 6 represents the numbers "5" to "0", the display pattern P1 consisting of the number "5" means the longest waiting time, and the display pattern P5 consisting of the number "1" is the most. It means a short waiting time, and further means that the display pattern P6 consisting of the number "0" is currently in an empty state. The closer to 5 to 0 means that the waiting time is shorter. Next, the operation of this embodiment will be described with reference to FIGS. First, the inspection process for body surface contamination will be described with reference to FIG. Note that reference numeral 12 shown in FIG.
Is a measurement box, and reference numeral 13 is a person to be measured.

The person to be measured 13 who enters the measuring box 12 is detected by the intrusion detection sensor 4 (T1), and an intrusion detection signal is sent from the intrusion detection sensor 4 to the control device 10.
When the control device 10 receives the intrusion detection signal, it controls the drive unit (not shown) of the entrance door 1 to open the entrance door 1 (T2). When the person to be measured 13 enters the measurement box 12 through the opened entrance door 1 (T3) and places his / her hands and feet at a predetermined position (the radiation detector 3 is installed facing the position). (T4), the limb setting detection sensor 5 detects that the hands and feet are correctly placed at the predetermined positions. The detection signal is sent to the control device 10.

When the control device 10 receives the detection signal from the limb setting detection sensor 5, the control device 10 takes in the radiation detection signal detected by the radiation detector 3 and determines whether or not the body surface of the subject 13 is contaminated.

When the radiation measurement on the body surface is completed and it is confirmed that there is no contamination, the control device 10 controls the drive unit (not shown) of the exit door 2 to open the exit door 2 (T5). When the person to be measured 13 leaves the exit of the measurement box 12 (T6), this is detected by the exit detection sensor 6, and an exit detection signal is sent to the control device 10. When the control device 10 receives the exit detection signal, it controls the drive unit of the exit door 2 to close the exit door 2 (T7). T1 to T above
Step 7 is a series of inspection steps related to the inspection for contamination. Next, how the display contents of the display 11 in the steps T1 to T7 are switched by the control device 10 will be described with reference to FIG.

First, in the state of T7 in FIG. 4, that is, in the state where the person to be measured is not in the measurement box 12, the display pattern P6 of FIG. 3 (a) is read from the memory and displayed on the display 11 for output. It Therefore, the display pattern P6 is displayed on the display unit 11.

When the person to be measured 13 enters the measurement box 12 and the person to be measured 13 is detected by the intrusion detection sensor 4, the display pattern P1 is read from the memory and the display content of the display 11 is displayed. It is switched to P1.

Next, when the person in the measurement box 12 starts the measurement operation and it is detected that the limbs of the person to be measured 13 are installed at predetermined positions, the timer in the control unit 10 causes Timing starts.

The time required from the actual measurement of the radiation dose to the determination of the presence or absence of contamination is almost constant. In the present embodiment, all steps are divided into five, the period from the intrusion detection to the measurement start is the first process, and the period from the measurement start to the determination end is the second to fifth processes. Since the time from the second process to the fifth process is almost constant as described above, each process has a length obtained by dividing the time into four equal parts. The display pattern P1 is displayed in the first step, and the display pattern P2 is displayed in the second to fifth steps.
~ P5 are displayed respectively.

Display 1 after a lapse of a predetermined time from the start of measurement
The display content of 1 is switched from P1 to P2. After that, the display contents of the display 11 are similarly set to P2 according to the timing of the timer.
Switch to P5. When the fifth step is completed and the exit detection signal is received, the display content of the display 11 is switched from P5 to P6. After that, it waits until the next person to be measured enters.

As described above, according to the present embodiment, the variable display contents display 11 is provided at the entrance of the measurement box 12, and six kinds of display patterns P1 to P6 indicating the progress of the contamination inspection process are displayed in the contamination inspection process. Since the switching is made according to the progress, the person to be measured who will enter the gate monitor from now on is the display 11
With a glance, it is possible to easily know to what extent the previous inspection process of the person to be measured has advanced. In addition, modified examples of the display patterns P1 to P6 indicating the progress of the contamination inspection process are shown in FIGS. The display pattern shown in FIG. 3B is an example in which the progress of the contamination inspection process is represented by a bar graph. The shorter the bar graph, the more advanced the process. The display pattern shown in FIG. 3C is composed of striped patterns drawn at regular intervals, and the display angle of the striped patterns is changed to indicate the progress of the contamination inspection process.

The display pattern shown in FIG. 3D is an example of a bar graph group in which the height changes stepwise, and each bar graph displayed by color is changed according to the progress of the contamination inspection process. The display pattern shown in FIG. 3E is an example in which the regions to be displayed by color are gradually reduced in accordance with the progress of the contamination inspection process. The display pattern shown in FIG. 3F shows the progress by the size of the number, and the value of the number is gradually increased according to the progress of the contamination inspection process.

In addition to the above display pattern, the progress of the contamination inspection process may be represented by the flushing speed. Further, the remaining time of the contamination inspection may be displayed.

FIGS. 5 and 6 show an embodiment in which a plurality of gate monitors are provided side by side. In this embodiment, a plurality of gate monitors 10A to 10F having the same configuration as the above-described first embodiment are provided with indicators 20A to 20F for displaying the relative inspection end order, and the gate monitors 10A to 10F are provided. Are connected via a data transmission line 21.

Each of the gate monitors 10A to 10F sends out the remaining test time information to the data transmission line 21, and takes in the remaining test time of each monitor from another monitor via the data transmission line 21. Then, the inspection end order of the own monitor in the entire monitor is obtained, and the inspection end order of the own monitor is displayed on the display devices 20A to 20F. It should be noted that the other functions of the original monitor for inspecting the presence or absence of contamination, the display control function described above, and the like are the same as those in the first embodiment.

According to the present embodiment as described above, since the inspection completion order is displayed on each of the gate monitors 10A to 10F provided side by side, the person to be measured who is going to measure is extremely sensitive to which monitor is the fastest. It can be easily judged. The present invention is not limited to the above embodiments, and various modifications can be made without departing from the gist of the present invention.

[0032]

As described above in detail, according to the present invention, information about the progress of the body surface contamination inspection is sequentially displayed according to the progress as well as whether or not it can be used near the entrance of the measurement box, and a plurality of units are installed side by side. In such a case, it is possible to provide a gate monitor that can easily and easily determine which monitor finishes the inspection fastest.

[Brief description of drawings]

FIG. 1 is a functional block diagram of a gate monitor according to a first embodiment of the present invention.

FIG. 2 is a flowchart of the gate monitor shown in FIG.

FIG. 3 is a diagram showing various display examples of display patterns.

FIG. 4 is a diagram showing a measurement process.

FIG. 5 is a schematic diagram of a second embodiment.

FIG. 6 is a front view of the second embodiment.

FIG. 7 is a functional block diagram of a conventional gate monitor.

8 is a timing chart for explaining a display operation in the gate monitor shown in FIG.

[Explanation of symbols]

1 ... Entrance door, 2 ... Exit door, 3 ... Radiation detector, 4 ... Intrusion detection sensor, 5 ... Limb setting detection sensor, 6 ... Exit detection sensor, 10 ... Control device, 11 ... Indicator.

Claims (1)

[Claims] 1. A gate monitor for inspecting body surface contamination of a subject according to a series of steps when the subject enters the measurement box, and display means provided near the entrance of the measurement box, and inside the measurement box. 2. A gate monitor, comprising: display control means for sequentially displaying information on the progress of the inspection performed in 1. on the display means according to the progress of the process.