JPH0519055A - Intelligent measurement display - Google Patents

Abstract

PURPOSE:To work information on radiation environment according to actual works of a worker and to output information with practical display modes and a variety of contents by subjecting information sent from a radiation detection means through a transmission cable to sequential arithmetic processing. CONSTITUTION:A processing arithmetic means 11 subjects information sent from each radiation detection means 6 installed at a place to undergo patrol inspection of radiation environment through a transmission cable 7 to sequential arithmetic processing. Processing operation is made every predetermined time at each place, and its results are sequentially stored into the computer RAM so as to be applied for every kind of screens displayed on an image display 9. A display control means 13 allows a display 9 to switch ON when the position of the SW symbol on a touch panel 10 is depressed, and the display 9 makes a menu screen appear. The menu screen can be watched through the overlapped transparent touch panel 10. The menu screen displays several kinds of pattern names and their screen numbers, and a screen can be displayed when the panel 10 on a number to be selected is depressed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This invention relates to radiation in nuclear power plants, reprocessing plants, radiation medicine, synchrotron radiation facilities, etc.
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intelligent measurement and display device for a radiation environment patrol inspection for recognizing the radiation environment before a patrol inspection in industries and research institutions that use radioactive materials.

[0002]

2. Description of the Related Art Techniques for collecting and displaying radiation measurement values in a concentrated manner have already been developed, but all of them only display the count values collectively in a panel form. That is, since only the dose equivalent rate is displayed, the worker needs an intellectual examination work according to his / her individual insight in order to actually use this data for judgment.

[0003]

Therefore, the worker in the radiation environment site must confirm the dose equivalent rate and then
If information processing is required and the dose equivalent rate value is different from the normal value, it will be time-consuming to check the history of information.

The present invention has been made in view of the above circumstances, and it is possible to process radiation environment information according to the actual work of an operator and output the information in a practical display form and various contents. It is an object of the present invention to provide an intelligent measurement display device for radiation environment patrol inspection.

[0005]

In order to achieve the above object, the present invention provides a radiation detecting means 6 installed at at least one place where a radiation environment inspection is to be carried out, and a pulse from the radiation detecting means 6. The detection signal is sequentially read at each of the above-mentioned locations at predetermined intervals via the transmission cable 7, and the processing and calculation means 11 for calculating the radiation dose equivalent rate and storing the data in the memory, the image display 9 and the transparent display superimposed thereon. A touch panel 10, a display pattern memory device 12 used for the display pattern of the image display 9, and a battery power source
The relay switch drive circuit 3 connected to the power supply circuit of the image display 9 via the power switch 2 of the image display device and the input signal from the touch panel 10
9. The relay switch drive circuit 3 of 9 is turned on / off, the screen to be output to the image display 9 is identified by the input signal, and the memory accumulation result by the processing operation means 11 corresponding to that is called, It is composed of a display control means 13 for selecting a display pattern from the display pattern storage memory 12 and outputting it to the image display 9.

[0006]

With the above structure, the following is obtained. It will be described with reference to FIG. In an unattended state where no workers are initially installed in the facility where the intelligent measurement display device for radiation environment inspection of the present invention is installed, the battery power source 1 of the device is a power switch 2 (normally O
N state), and is connected to all power supply circuits except the image display 9. That is, all but the image display 9 are in the operating state. Therefore, the micro computer operates as follows in an unmanned state. The information sent from each radiation detecting means 6 installed at at least one place where the radiation environment is to be inspected and checked via each transmission cable 7 is sequentially processed according to the program written in the ROM of the computer. This processing calculation is performed by each location at predetermined time intervals, and the results are sequentially accumulated in the RAM of the computer so that the processing calculation means 11 can be adapted to various screens displayed on the image display 9 later.

The display control means 13 operates as follows. When an operator comes for a patrol inspection, first, the position of the SW symbol on the touch panel 10 is pressed. An interrupt is generated by the SW signal, and it is recorded that the SW signal is input to a predetermined address of the RAM by the interrupt program. On the other hand, the main program periodically checks the address of the SW signal and recognizes it. As a result, an ON signal is sent to the image display relay switch drive circuit 3,
The image display 9 power is turned on. After a while, the menu screen appears on the image display 9. The menu screen is visible through the transparent touch panel 10 overlaid on it.
Several kinds of pattern names and their screen numbers are displayed on the menu screen. Here, if the touch panel 10 on the number to be selected is pressed, that screen is displayed. If the same screen is displayed for more than a predetermined time, it is considered as an unmanned state, and the computer sends an OFF signal to the image display relay switch drive circuit 3 to display the image display.
Turn off the power of 9.

The display pattern memory device 12 stores a map / perspective view of a room or area to be inspected and a route for inspection inspection sequence, and various output formats for radiation information. The screen output by the menu screen is the display pattern and the processing calculation means 11
The radiation environment information stored in the RAM is synthesized. It outputs a patrol inspection route map, a real-time table of dose equivalent rates by location, a history table of dose equivalent rates by location, and a radiation intensity distribution map. Also, from the menu screen, select
The request to turn off the power is also accepted.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The operation of the following embodiment of the measurement display device for inspection of the radiation environment of the present invention will be described with reference to FIG. Here, 44 is a part of the apparatus main body of one embodiment of the present invention, and shows the part of the apparatus excluding the radiation detection circuit. This part is put together in one compact rack and installed inside or outside the entrance of the room to be patroled. 20 is the basic part of the Microcomputer,
It is composed of a CPU 21, a RAM 22, and a ROM 23. RO
M23 is a program that controls the micro computer Figure 3
To 5 (described later), the CPU 21 operates according to this program. At first, I am unmanned and do the following work. The pulse signals from the radiation detection circuits 48, 49, ..., 50 installed at multiple locations to be inspected for radiation environment are respectively transmitted via the respective transmission cables 45, 46, ..., 47. Are input to the pulse counters 38, 39, ... C
The PU 21 sequentially reads the pulse numbers through the interface circuits 28, 29, ..., 30 and resets the pulse counter to 0 each time. Now here, the detection times i at location m
Represent times th detection time and T _im, representing the T _im and the detection time T _(i-1) one time before detection time between _m Delta] t _im, the number of radiation detection pulse during which the n _im. That is, the reading of the i-th pulse number of detection times at the place m is performed at time T _im , and the detection time interval, that is, the detection time, is Δt _im , and the pulse number at that time is n _im . Here, the detection time Δt
_im is equal to or larger than the predetermined time Δt ₀ . Here, Δt ₀ is set in the order of minutes. From the pulse number n _im for each detection at each place, α n _im / Δt _im
The radiation dose equivalent rate r _im is calculated by Here, α is a coefficient for converting the number of output pulses into a dose equivalent rate. The value of r _im is processed so as to be convenient for the screen output of the screen display 32 later, and is sequentially stored in the RAM 22 at each detection time.

Here, the worker enters the room and touches the touch panel 31.
When the SW position is touched, the interrupt program rewrites the recognition code to a predetermined address in the RAM 22. On the other hand, since there is a routine for checking this address in the main program, the change in the code will inform the power-on request of the image display 32, send a set signal to the flip-flop circuit 34 through the interface circuit 27, and relay switch. The drive circuit 33 is turned on, and the image display 32 is turned on from the battery power source 36 through the power switch 35 (always on).
After a while, a menu screen as shown in Table 1 appears on the image display 32.

[0011]

[Table 1]

The above menu screen can be seen through the transparent touch panel 31 which is overlapped with the liquid crystal image display 32. If you press the position of the screen number on the surface of the touch panel 31, that screen will be selected and appear. Further, in the case of screen numbers 2 to 5, it is possible to select whether to display the numerical value of the dose equivalent rate at the position of the radiation detection circuit installation place in the inspection inspection route diagram, or to display it in a table or graph. To display it on the route map, touch the touch panel 31 above the Y position. Press N to display in a table or graph. 1. FIG. 6 shows an example of the inspection inspection route map of FIG. Here, a device main body 44 having the touch panel 31 and the image display 32 in the front is installed on the wall immediately near the entrance 62. These devices are connected to the radiation detection circuit through the transmission cable from the device main body 44, but they are not shown. Radiation detection circuit 48,49, ..., 50
The installation position 61 of is marked with Δ. The dotted line indicates the route that the worker should follow along the Δ mark to go up from the entrance 62 to the second floor. The numerical value in the Δ mark corresponds to the place number. “Xx.x” displayed on the side of Δ indicates the display position of the numerical value of the dose equivalent rate. However, this numerical value is displayed when Y is further pressed in the screen selection numbers 2 to 5. In FIG. 6, R / V of 63 is a reactor vessel, 64 is radiation shielding concrete, 65 is a primary cooling water pipe, 66 is a steam generator, 67 is a primary cooling water pump, 68 is piping, and 69 is a cock. 2. Then, the latest detection data is displayed for each place.
The data before the latest detection may be put in the table at the same time. An example is shown in Table 2. However, Table 2 shows a case where N is pressed after selection number 2. If Y is pressed, the dose equivalent rate is displayed at the detection circuit installation location on the route diagram of FIG. 6 as described above.

[0013]

[Table 2]

3. Shows a graph in which the horizontal axis represents time or detection times and the vertical axis represents radiation dose equivalent rate. The parameter of the graph is represented by a location m, and the radiation dose equivalent rate is represented by a location as a function of time. If the horizontal axis is time,
The current value is set to 0 and the elapsed time from the detection time is set. For example, the data of the radiation dose equivalent rate r _im is recalculated to the radiation dose equivalent rate at every detection time interval of about 1 hour. The dose equivalent rate is represented by a logarithmic graph. This embodiment is shown in FIG. However, this is the case where N is pressed after the screen selection number 3. When Y is pressed, the data is sequentially output and displayed at each place on the route diagram of FIG. 4. Then, the average value / maximum value of r _im up to the present by location
Indicates the minimum value. When N is pressed after the screen selection number 4, the same pattern as in Table 2 is displayed on the screen. When Y is pressed, the value is displayed on the route diagram of FIG. 5. Then, it is a screen in which the same level value of the radiation dose equivalent rate in the room of the menu 1 patrol inspection route diagram is connected by a curve. It is a figure in which the intensity distribution of a radiation dose equivalent rate can be understood at a glance. This is the case where Y is pressed after the screen selection number 5, but when N is pressed, it is represented by a numerical table showing the two-dimensional position coordinates of the room and the intensity thereof. It should be _noted that the intensity distribution is calculated from the radiation dose equivalent rate r _{im at the} detection location a at the i-th detection time. In this case, the two-dimensional position coordinates of each detection location a must be recorded in advance in the ROM or the like. There is.

The display pattern of each screen including the menu screen displayed on the image display 32 is stored in the display pattern memory device 25. In accordance with the program, the required screen is called and displayed from the display pattern memory device 25 each time. In the case of screens 2 to 5, the calculation result relating to the radiation dose equivalent rate necessary for the screen and the display pattern of the screen are combined and output to the image display 32.

The above circuits of the micro computer are connected by a bus 37 of data, address and control lines. Since the micro computer is always ON, it is of the floating type as well as the battery power source. Further, as the number of times of detection i increases, the data is gradually accumulated in the RAM 22, so that the memory area becomes insufficient. Therefore, when the remaining memory capacity is appropriate, the average value and the maximum value are calculated, and then the detection times are aggregated, for example, several tens of times and the average is taken, and the data is compressed, or the data of the radiation dose equivalent rate r _im is calculated. It is stored in the external memory device 26 as it is.

Next, the programs shown in FIGS. 3 to 5 will be described. When the power of the computer is turned on, first, all circuits including the interface circuit are initialized. In step (a), the interface circuit 27 of the image display 32
Through, the relay switch drive circuit 33 of the power supply is turned on.
A reset signal is sent to the flip-flop circuit 34 so that As a result, the image display 32 is turned off. In step (a), a pulse counter 38, 39, which reads the internal timer time T _O of the computer and counts the pulses sent from all the radiation detection circuits 48, 49, ..., 50 by the respective transmission cables. ..., Reset all 40 to 0. In step (c), the predetermined minimum value Δt _o of the radiation detection time for each time, that is, the minimum interval Δt _o of the detection times (set in minutes) is set from the predetermined address of the ROM 23 to the CPU 21. Read into register. The check address of the detection time i of the RAM 22 is set to 1 as the first time. In step (d), the number of radiation detection circuits, that is, the total number a of installation locations is read from the ROM 23, and the detection circuit or location number m is set to 1.

In step (e), the i-th detection time T _im is read from the computer internal timer through the interface circuit connected to the location number m. When the series of work related to one radiation detection up to FIG. 5 is completed, the detection number i is incremented by one and the process returns to the beginning of step (e). In step (f), the time Δ from the previous detection time T _{(i-1) m}
If t _im , that is, (T _im −T _{(i-1) m} ) is less than Δt _o , return to the beginning of step (e), and if Δt _o time is exceeded, T _im time and Δt _im time are fixed, Go to the next step.

In step (g), the interface circuit connected to the detection location number m is selected, and the radiation detection number n _im during Δt _im time is read from the pulse counter through the interface circuit and reset to 0. To do. The following calculation for the i-th radiation detection is performed. Here, α is a coefficient for converting the number of output pulses into a dose equivalent rate. 1. Number of radiation detections per unit time n _im / Δt _im 2. Radiation dose equivalent rate r _im = αn _im / Δ
The result of t _im or more is saved in the RAM 22 as data of T _im time.

In step (h), m is incremented by 1 and the process returns to step (e). If m is larger than a, the process proceeds to the next step (K).

In step (k), the average of r _im from the detection number i = 1 to the latest detection number, the maximum / minimum value and the time r _{im in} each period are stored in another address of the RAM 22 for each m. In addition, the dose equivalent rate is recalculated for each predetermined time interval from the start of detection for each m for each location and accumulated separately. Usually the data is compressed. Further, all the input data of r _im are stored in the RAM 22.
The memory capacity occupying the area is checked, and if it exceeds a predetermined capacity, the data of the old detection time is transferred to the external memory device 26.

In step (C), it is checked whether there is a switch ON request from the touch panel 31. (If there is a switch ON request from the touch panel 31, it is recorded at a predetermined address in the RAM by the interrupt program.) If there is no request, the process returns to step (e) to perform the next detection operation. If requested, proceed to the next step. RAM that holds the selection number of the screen menu
The address is checked to see if its number is 0 (0 for unselected, 0 for initial setting), that is, unselected. If the number is already selected, jump to B. If it is 0, proceed to the next step.

In step (S), a set signal is sent to the flip-flop circuit 34 to turn on the relay switch drive circuit 33 of the image display 32. (Here, the menu screen of the image display 32 appears, and if there is an input signal from the touch panel 31, the interrupt program causes the selection number and route diagram Ye.
s / No is held in the RAM address. )

In step (s), the selection number of the RAM address and Yes / No of the route diagram are checked and the corresponding screen is displayed. (However, the determination of Yes / No in the route diagram is omitted in FIG. 5.) If not selected and the number is 0, the predetermined time is checked until the number changes. If the predetermined time is exceeded, the SW RAM address of the touch panel 31 is changed to the OFF sign, a reset signal is sent to the flip-flop circuit 34, and the relay switch drive circuit 33 of the image display 32 is turned off.
Then, return to step (e). When the screen is displayed, when the predetermined time is exceeded, the RAM address is similarly changed to the OFF sign, the relay switch drive circuit 33 is turned off, and the process returns to step (e). If it does not exceed, return to step (e). Therefore, if the continuous display time of the screen is set longer than the detection time interval of each detection time, the screen is replaced with the calculation result of new data every time the detection time is changed.

[0025]

As described above, according to the intelligent measurement display device for inspection of radiation environment of the present invention, the following effects can be obtained. A large number of locations to be inspected for radiation environment are recorded unattended for 24 hours continuously, and the radiation environment information is processed according to the actual work of the operator, which enables the operator to perform on-site inspection. It becomes possible to display necessary information with more practical contents at any time when necessary. In addition, it is a lightweight, compact and inexpensive device that employs a liquid crystal display and is capable of color display and effectively alerts the operator.

[Brief description of drawings]

FIG. 1 is a diagram corresponding to a claim of the present invention.

FIG. 2 is an example of the present invention.

FIG. 3 is a program written in a RAM according to an embodiment of the present invention.

4 is a continuation of the program of FIG.

5 is a continuation of the program of FIG.

FIG. 6 is an example of a screen output to an image display device and a patrol inspection route diagram in the present invention.

FIG. 7 is a history graph diagram of an example of a screen and a place-by-place r _im output to the image display device in the present invention.

[Explanation of symbols]

1,36 Battery power supply 2,35 Power supply switch 3,33 Relay switch drive circuit 6 Radiation detection means 7,45-47 Transmission cable 9,32 Image display device 10,31 Touch panel 11 Processing calculation means 12 Display pattern memory device 13 Display Control means 20 Microcomputer basic part 21 CPU 22 RAM 23 ROM 25 Display pattern memory device 26 Memory device for dose equivalent rate r _im 27 to 30 Interface circuit 34 Flip-flop circuit 37 Data, address and control line Bus 38-40 Pulse counter 44 Part of the apparatus main body of the embodiment (excluding radiation detection circuit) 48-50 Radiation detection circuit 60 Inspection inspection route diagram 61 Installation position of radiation detection circuit 62 Entrance 63 R / V, reactor vessel 64 Radiation shielding concrete 65 Primary cooling water pipe 6 SG, steam generator 67 RCP, primary cooling water pump 68 pipe 69 Cook

Claims (1)

What is claimed is: 1. At least 1 to be inspected for radiation environment.
Radiation detection means (6) installed in one place, and the pulse detection signal from the radiation detection means (6) is sequentially read at each of the locations via the transmission cable (7) at a predetermined time and the radiation dose equivalent rate Processing means (11) for performing calculations and storing the data in the memory, an image display (9) and a transparent touch panel (1
0) and the display pattern memory device (12) used for the display pattern of the image display (9) and the power switch (2) of the battery power supply (1), and the power supply circuit of the image display (9). ON of the relay switch drive circuit (3) of the image display (9) according to the input signal from the touch panel (10) and the relay switch drive circuit (3) connected to
-The display pattern storage memory is turned off and the screen to be output to the image display (9) is identified by the input signal, and the corresponding memory accumulation result by the processing operation means (11) is called up. An intelligent measurement display device for a radiation environment inspection, comprising a display control means (13) for selecting a display pattern from (12) and outputting it to the image display (9).