JP4282595B2 - Vibration monitoring system, vibration monitoring method, radiation detection system, and radiation detection method - Google Patents

Description

  The present invention relates to a vibration monitoring system, a vibration monitoring method, a radiation detection system, and a radiation detection method that can be effectively used to monitor a plant that is difficult for humans to enter.

  Known techniques for detecting valve leakage include those using acoustic sensors and those detecting vibrations (see Patent Documents 1 to 3).

Many remote control valves used in plants that are difficult for humans to enter, for example, inside a reactor containment vessel that is in operation, are laid in severe environments with high temperatures and high radiation doses. It is necessary to monitor with. There is a demand for improved reliability, easy operation, and low cost of devices that monitor the periphery of such remote control valves. The remote control valve installed inside the containment vessel consists of a central control room control panel or on-site control panel that remotely controls the opening and closing of the remote control valve, and penetrations (signals to keep the inside of the container sealed) A signal line and a power line are connected via an extraction terminal.
JP 2002-296139 A JP-A-6-323945 JP 2002-130531 A

  In the conventional valve leak detection system, it is necessary to attach an accelerometer or the like to a location where measurement is desired and to wire the valve where the valve leak detection system is installed, so only limited measurement is possible.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to enable remote and simple monitoring of the vibration of a measurement object that cannot be easily approached by humans or the radiation dose in the vicinity thereof. .

In order to achieve the above object, one aspect of a vibration monitoring system according to the present invention is a vibration monitoring system for remotely monitoring vibration of a measurement object, wherein the measurement is performed at least partially fixed to the measurement object. A plurality of power generation means configured to generate an electromotive force in response to vibration of an object, and each of the power generation means are arranged at predetermined positions, and each emits light by the electromotive force generated by the plurality of power generation means a plurality of light emitting means, a television camera to monitor the flickering of the plurality of light emitting means, a pan head to set the orientation of the television cameras arbitrarily the television camera is mounted, is obtained by the television camera Yes and a monitor for displaying an image, and a camera platform operating device for controlling remotely the camera platform such that the television camera monitors the sequentially a plurality of light emitting means disposed in a predetermined position That.

Furthermore, in another aspect of the vibration monitoring system according to the present invention, in the radiation detection system for remotely detecting radiation, each is arranged at a predetermined position, and each color is detected when a radiation dose of a certain level or more is detected. A plurality of functional color materials that change, a camera that shoots the plurality of functional color materials, a pan head on which the TV camera is mounted and the posture of the camera is arbitrarily set, and acquired by the TV camera A monitor for displaying an image; and a pan / tilt head controller for remotely controlling the pan / tilt head so that the television camera sequentially monitors a plurality of light emitting units arranged at the predetermined positions. .

The vibration monitoring method according to the present invention is a vibration monitoring method for remotely monitoring the vibration of a measurement object. The piezoelectric element, the light emitting element, and the detector and the capacitor connected in series to the piezoelectric element and the light emitting element. and a conversion circuit which comprises a voltage comparator circuit for converting the electromotive force of the piezoelectric element to the blinking cycle of the light emitting element, and attaching a predetermined plurality of attachment points of the measurement object, orientation of the television cameras remotely Monitoring step of sequentially monitoring blinking of the light emitting elements at the plurality of attachment points while remotely controlling the light emitting element.

Further, the radiation detection method according to the present invention is a radiation detection method for remotely detecting radiation, wherein a functional color material that changes color when a radiation dose of a certain level or more is detected is disposed at a predetermined plurality of attachment locations ; A step of sequentially photographing the functional color material of the plurality of attachment points with the television camera while remotely controlling the posture of the television camera; and a step of remotely displaying the video of the television camera. It is characterized by.

  ADVANTAGE OF THE INVENTION According to this invention, the vibration of the measuring object which a person cannot approach easily, or the radiation dose of the vicinity of it can be easily monitored remotely using a television camera etc.

  Hereinafter, each embodiment of the present invention will be described with reference to the drawings. Here, the same or similar parts are denoted by common reference numerals, and redundant description is omitted.

[First Embodiment]
The first embodiment will be described with reference to FIGS. Here, FIG. 1 is an overall perspective view of the vibration monitoring system of this embodiment on the site (inside the reactor containment vessel) side. 2 is a plan view of the vibration state indicator of FIG. 1, FIG. 3 is a circuit diagram of the vibration state indicator of FIG. 2, and FIG. 4 is a cross-sectional view of the vibration state indicator of FIG. FIG. 5 is an elevational view in the vicinity of the state detection device of FIG. 1, and FIG. 6 is a block diagram of the configuration of the valve state monitoring device on the control room side of the vibration monitoring system of the first embodiment.

  As shown in FIG. 1, a remote control valve 2, a manual valve 3 for a measurement (monitoring) object, and a pipe 4 connecting them are arranged in the reactor containment vessel. A plurality of vibration state indicators 7 are attached to the surfaces of these measurement objects, and the vibration state indicators 7 can be monitored by the state detection device 5.

  As shown in FIGS. 2 to 4, the vibration state indicator 7 includes a piezoelectric element 8 having a thin plate shape, a conversion circuit 10 attached to the piezoelectric element 8, and a light emitting element 9. The vibration state indicator 7 constitutes a closed circuit shown in FIG.

  As shown in FIG. 4, one end of the piezoelectric element 8 having a thin plate shape is attached to the measurement object 25, and the detector 17, the capacitor 18, the voltage comparison circuit 19, and the light emitting element 9 such as an LED are connected to the other end of the piezoelectric element 8. It is attached to the top surface. When the measurement object 25 vibrates, the piezoelectric element 8 having a thin plate shape is in a cantilever state, so that the piezoelectric element 8 is bent and a voltage is generated. This voltage is set to only the positive voltage using the detector 17, and charges are accumulated in the capacitor 18. The voltage comparison circuit 19 checks whether or not the voltage accumulated in the capacitor 18 exceeds a certain value, and discharges when the voltage exceeds a certain value. The light emitting element 9 is caused to emit light by the discharged electricity.

  As shown in FIGS. 1 and 5, the state detection device 5 is installed on, for example, the remote control valve 2 by a mounting jig 6, and includes a CCD camera (TV camera) 11, a microphone 12, and an accelerometer 13. Further, a signal transmitter 14 is provided for transmitting the output signals of the CCD camera 11, the microphone 12 and the accelerometer 13 to the control panel of the central control room or the on-site control panel and conversely receiving the control signals. Furthermore, the CCD camera 11 and the like are placed on the camera platform 15 so that the direction can be changed. In addition, a signal outlet 16 is provided in the pan head 15 or the like in order to output a signal line from the signal transmitter 14 to the outside.

  With the above configuration, the light emitting element 9 blinks according to the vibration of the vibration state indicator 7, and this blinking cycle can be monitored by the state detection device 5. The blinking cycle of the light emitting element 9 is shortened according to the strength of vibration. Conventionally, the sound of a microphone is generated according to the intensity of light or voltage, but if the blinking cycle of the light emitting element 9 of this embodiment is monitored, it will not be subject to aging or environmental changes. In addition, there is no inconvenience of mixed sound that occurs when the voltage is set to the loudness. Therefore, the vibration measurement is highly reliable. Further, since it is an inexpensive vibration state indicator that does not require the signal line of the vibration sensor, the state around the valve can be obtained by pasting the vibration state indicator 7 at many positions and monitoring the blinking cycle with the CCD camera 11. Can be monitored collectively.

  FIG. 6 shows a valve state monitoring device 90, a coupler 98, and a remote control valve control panel 99 arranged in a central control room or a field control panel outside the reactor containment vessel. The signal line from the signal transmitter 14 (FIG. 5) of the state detection device 5 passes through the signal outlet 16 and is connected to the receiver 91 of the valve state monitoring device 90 via the coupler 98 outside the reactor containment vessel. Has been. The coupler 98 is also in communication with a remote control valve control panel 99. The valve state monitoring device 90 includes a monitor 92, a speaker 93, an acceleration signal display 94, a pan head operating unit 95, an image processing unit 96, and a monitoring controller 97, by which an operator monitors a remote control valve and the like.・ It can be controlled.

  In order to collect images of the vibration state indicator 7 attached to the monitoring target location such as the remote control valve 2, the manual valve 3 and the surrounding piping 4, the operator uses the pan head operating unit 95 to make the posture of the pan head. If this is performed with constant adjustment, it will be a heavy burden on the operator. In this embodiment, the panorama posture data of the viewpoint to be monitored in advance is set using the monitoring controller 97, and the TV camera 11 is automatically directed to the valve and the plurality of vibration state indicators 7 around it automatically. That state can be detected.

  According to this embodiment, it is realizable with a highly reliable and simple structure. Moreover, it is easy to attach the vibration status indicator 7 to the object to be monitored, and it is not necessary to supply power to the vibration status indicator 7 or to wire a cable for inputting a signal. it can. In addition, it is possible to easily realize continuous monitoring by automatically controlling the posture of the camera platform.

[Second Embodiment]
The second embodiment will be described with reference to FIG. In this embodiment, the piezoelectric element is formed into a tape shape to form a piezoelectric tape display element 30, which is attached to a site to be monitored. One end of the piezoelectric tape display element 30 has a circuit similar to the conversion circuit 10 (FIG. 3) of the vibration state indicator 7 of the first embodiment. Thereby, the vibration of the piezoelectric tape display element 30 can be detected, the light emitting element 3 can be blinked, and the vibration can be converted into a blinking period. The configuration of the state monitoring device 5 is the same as that of the first embodiment (FIG. 5). By monitoring the blinking cycle of the light emitting element 3 with the CCD camera 11 of the state monitoring device 5, the area around the operation valve can be monitored.

  This system is suitable when it is desired to monitor a portion that cannot be directly seen by the monitoring camera or a wide vibration region. Alternatively, the blinking period can be automatically calculated by image processing of a television camera image, and a caution signal can be generated when a certain threshold value is exceeded.

  If it is a still video signal, the difference from the previous video signal is taken and the number exceeding a certain threshold is counted for a certain time. Since the video signal can indicate the location of the measurement position together with the scanning line voltage, it is easy to count the number of blinks of the light emitting element at the same location. In addition, a warning signal can be issued when the number of blinks exceeds the total screen. In the case of a television camera operated on a pan head, the number of blinks can be monitored in the same manner with reference to the pan head monitoring direction signal. In this way, a wide area can be automatically monitored.

[Third Embodiment]
A third embodiment will be described with reference to FIGS. 8 and 9. In this embodiment, the radiation dose distribution around the valve is monitored, and the abnormality of the valve is detected from the abnormal change of the distribution. In this embodiment, a material that changes color when the radiation dose exceeds a certain level is attached to the valve and its surroundings, and images are collected by the CCD camera 11 (FIG. 5) of the remote control valve periphery monitoring device 5 to monitor the color change. By doing so, the abnormality of the valve is detected.

  As shown in FIG. 8, a radiation dose detection indicator 20 is attached to the remote control valve 2, the manual valve 3, the surrounding piping 4 and the floor surface in the reactor containment vessel. The radiation dose detection indicator 20 is obtained by processing a material that changes color when the radiation dose exceeds a certain level into a sheet shape. As shown in FIG. 9, the radiation dose detection indicator 20 includes a set of a plurality of materials 31 to 34 that change color at different radiation levels. The radiation dose detection indicator 20 is solidified with a functional dye obtained by combining a material (for example, fluoran dye, N-tosyloxyphthalimide, etc.) having high sensitivity to radiation irradiation in accordance with an arbitrary sensitivity. These functional color materials are usually transparent and colorless, and change color to red, blue, etc. when irradiated with radiation.

  To detect the valve abnormality, the CCD camera 11 of the state detection device 5 collects a video signal showing the radiation dose detection indicator 20, and the transmitter transmits the ground station (central control room control panel or field control panel) side. This is done by receiving the signal at the receiver and displaying it on the monitor for monitoring.

  This embodiment is performed by the occurrence of radiation dose distribution abnormality as means for detecting valve abnormality, and can be realized with a simple configuration. In addition, only the work of attaching the radiation dose detection indicator 20 to the monitoring object does not require power supply to the radiation dose detection indicator 20 or cable wiring for inputting a signal, and can be realized at low cost. .

[Fourth Embodiment]
The fourth embodiment will be described with reference to FIG. As in the third embodiment, this embodiment monitors the radiation dose distribution around the valve and detects a valve abnormality from the abnormal change in distribution. A material that changes color when the radiation dose exceeds a certain level is used. It is attached to the valve and its surroundings, and images are collected by a CCD camera of a remote-operated valve periphery monitoring device, the state of discoloration is monitored, and abnormality of the valve is detected.

  As shown in FIG. 10, a radiation dose detection indicator 40 is attached to the remote control valve 2, the manual valve 3 and the surrounding piping 4 in the reactor containment vessel. The radiation dose detection indicator 40 liquefies a material that changes color when the radiation dose exceeds a certain level, and is sealed in a transparent tube sheet that does not change color due to radiation or heat. The radiation dose detection indicator 40 is a set of a plurality of elements that discolor at different radiation levels. The radiation dose detection indicator 40 liquefies a functional dye obtained by combining materials having high sensitivity to radiation irradiation (for example, fluorane dye, 2 propanol solvent, N-tosyloxyphthalimide, etc.) according to an arbitrary sensitivity. It is.

  For detecting the valve abnormality, the CCD camera 11 (FIG. 5) of the state detection device 5 collects a video signal showing the radiation dose detection indicator 40 and receives it with a receiver on the ground station side using a transmitter. This is done by displaying on the monitor and monitoring.

  This embodiment is performed by the occurrence of radiation dose distribution abnormality as means for detecting valve abnormality, and can be realized with a simple configuration. Moreover, the work of attaching the radiation dose detection indicator 20 to the monitoring object is simple, and it is not necessary to supply power to the radiation dose detection indicator 20 or to wire a cable for inputting a signal. Can be realized.

[Fifth Embodiment]
A fifth embodiment will be described with reference to FIGS. 11 and 12. As in the fourth embodiment, this embodiment monitors the radiation dose distribution around the valve and detects an abnormality of the valve from the abnormal change in distribution. A material that changes color when the radiation dose exceeds a certain level is used. It is attached to the valve and its surroundings, and images are collected by a CCD camera of a remote-operated valve periphery monitoring device, the state of discoloration is monitored, and abnormality of the valve is detected.

  In this embodiment, a radiation dose detection tape 50 in which a plurality of functional color materials 51 to 54 encapsulated in a transparent tube that is not discolored by radiation or heat shown in the fourth embodiment is bundled into a tape structure (band shape) is remotely It is wound and fixed around the monitoring target portion such as the operation valve 2, the manual valve 3 and the surrounding piping 4. The radiation dose detection indicator 50 attached to the monitoring target portion has a configuration in which a plurality of devices that change color at different radiation levels are arranged.

  The CCD camera 11 (FIG. 5) of the state detection device 5 collects video signals showing the monitoring target locations where a plurality of discoloration at different radiation levels are arranged, and displays them on the monitor for monitoring. Therefore, it is possible to monitor the change distribution of various discoloration and improve the reliability.

  Further, as shown in FIG. 12, color marker materials 60 and 61 coated with an arbitrary color are provided on the outside of the radiation dose detection tape 50 in which the functional color material is bundled in a band shape, and the color marker materials 60 and 61 are wound around the monitoring target portion. Fix it. Collecting the image of the radiation dose detection tape 50 provided with the color marker materials 60, 61, taking it in the image processing device 96 provided on the ground station side, performing color calibration of the collected image with the image of the color marker material, and the functional color material It becomes possible to automatically and quantitatively measure the radiation dose. Applying paint of any color that does not change color due to radiation or temperature on the outside of the functional color material configured in this way and attaching it to the monitoring target location, it becomes a means to shoot images of the monitoring target location with a TV camera As a result, the reliability can be further improved.

  This embodiment can be realized with high reliability and a simple configuration by detecting valve abnormality from occurrence of radiation dose distribution abnormality and measuring quantitative radiation dose. Moreover, it is easy to attach the radiation dose detection indicator 50 to the object to be monitored, and it is not necessary to supply power to the radiation dose detection indicator 50 or to wire a cable for inputting a signal. Can be realized.

[Sixth Embodiment]
A sixth embodiment will be described with reference to FIGS. 13 and 14. In the present embodiment, the radiation amount detection indicator 70 in which the functional color material is formed into a sheet shape as in the third embodiment is used as a monitoring target location such as the remote control valve 2, the manual valve 3, and the surrounding piping 4. Mounting, monitoring the radiation dose distribution around the valve, and detecting valve abnormality from abnormal changes in distribution. In the present embodiment, color marker materials 81 to 84 coated with an arbitrary color are provided on the outside of the radiation dose detection indicator 70 attached to the monitoring target location, as in the fourth embodiment, and are attached to the monitoring target location. Collects the image of the radiation dose detection tape 70 provided with the color marker materials 81 to 84, loads it into the image processing device 96 provided on the ground station side, performs color calibration of the collected image with the image of the color marker material, and the functional color material It becomes possible to automatically and quantitatively measure the radiation dose.

  This embodiment can be realized with a highly reliable and simple configuration by detecting valve abnormality from occurrence of radiation dose distribution abnormality and measuring quantitative radiation dose, and radiation dose detection indicator The operation of attaching 20 to the object to be monitored is simple, and it is not necessary to supply power to the radiation dose detection display 20 or to wire a cable for inputting a signal.

[Other Embodiments]
As mentioned above, although embodiment of this invention was described concretely, this invention is not limited to these. For example, in the first or second embodiment, instead of the piezoelectric element 8, other power generating means that generates an electromotive force by receiving vibration can be used. In addition, light emitting elements having different emission colors can emit light according to the electromotive force generated by the vibration.

The field side whole perspective view of the vibration monitoring system of a 1st embodiment of the present invention. The top view of the vibration status indicator of FIG. FIG. 3 is a circuit diagram of the vibration state indicator of FIG. 2. Sectional drawing of the vibration status indicator of FIG. FIG. 2 is an elevation view near the state detection device of FIG. 1. 1 is a block diagram of a configuration of a valve state monitoring device and the like on the control room side of a vibration monitoring system according to a first embodiment of the present invention. The field side whole perspective view of the vibration monitoring system of the 2nd Embodiment of this invention. The field side whole perspective view of the radiation detection system of the 3rd Embodiment of this invention. The top view of the radiation dose detection indicator of FIG. The field side whole perspective view of the radiation detection system of the 4th Embodiment of this invention. The site side whole perspective view of the radiation detection system of the 5th Embodiment of this invention. FIG. 12 is a schematic perspective sectional view of the radiation dose detection tape of FIG. 11. The field side whole perspective view of the radiation detection system of the 6th Embodiment of this invention. The top view of the radiation dose detection indicator of FIG.

Explanation of symbols

2 ... Remote control valve, 3 ... Manual valve, 4 ... Piping, 5 ... State detection device, 6 ... Mounting jig, 7 ... Vibration state indicator, 8 ... Piezoelectric element, 9 ... Light emitting element, 10 ... Conversion circuit, 11 DESCRIPTION OF SYMBOLS ... TV camera (CCD camera) 12 ... Microphone 13 ... Accelerometer 14 ... Signal transmitter 15 ... Pick head 16 ... Signal outlet 17 ... Detector 18 ... Condenser 19 ... Voltage comparison circuit 25 ... object to be measured, 30 ... piezoelectric tape display element, 40 ... radiation dose detection tape, 50 ... radiation dose detection tape, 60, 61 ... color marker material, 70 ... radiation dose detection indicator, 71-74 ... functional color material, 81-84 ... Color marker material, 90 ... Valve state monitoring device, 91 ... Receiver, 92 ... Monitor, 93 ... Speaker, 94 ... Acceleration signal indicator, 95 ... Pan head operation unit, 96 ... Image processing device, 97 ... Surveillance controller La, 98 ... Coupler, 99 ... Remote control valve control panel

Claims (15)

In the vibration monitoring system that remotely monitors the vibration of the measurement object,
A plurality of power generation means configured to be fixed at least partially to the measurement object and to generate an electromotive force when the measurement object vibrates.
Each is positioned at a predetermined position, a plurality of light emitting means for emitting respectively the electromotive force generated by the plurality of power generating means,
A television camera to monitor the flickering of the plurality of light emitting means,
A pan head on which the television camera is placed and the posture of the television camera is arbitrarily set;
A monitor for displaying video acquired by the television camera;
A pan head controller for remotely controlling the pan head so that the TV camera sequentially monitors a plurality of light emitting means arranged at the predetermined position;
A vibration monitoring system.   The vibration monitoring system according to claim 1, wherein the light emitting unit emits light emitting elements having different emission colors by electromotive force generated by the power generation unit. The vibration monitoring system according to claim 1, wherein the power generation means is a piezoelectric element . The piezoelectric element has a thin plate shape, and a part of the piezoelectric element is fixed to an object to be measured.
At least a part of the conversion circuit and the light emitting means is attached at a position away from a portion of the piezoelectric element fixed to the measurement object;
The vibration monitoring system according to claim 3 . The vibration monitoring system according to claim 4, wherein the piezoelectric element has a tape shape and is attached to a measurement object . 2. The apparatus according to claim 1, further comprising means for processing an image of the camera to calculate a blinking cycle of the light emitting unit and outputting a caution signal when the blinking cycle exceeds a predetermined threshold value. 6. The vibration monitoring system according to any one of items 5 . The vibration monitoring system according to claim 1, wherein the measurement object includes a remote control valve . In a radiation detection system that detects radiation remotely,
A plurality of functional color materials, each of which is arranged in a predetermined position, each of which changes color when detecting a radiation dose above a certain level,
A camera for photographing the plurality of functional color materials;
A pan head on which the TV camera is mounted and the posture of the camera is arbitrarily set;
A monitor for displaying video acquired by the television camera;
A pan head controller for remotely controlling the pan head so that the TV camera sequentially monitors a plurality of light emitting means arranged at the predetermined position;
A radiation detection system comprising: The radiation detection system according to claim 8, wherein the functional color material is in a sheet form and is attached to a measurement object . The radiation detection system according to claim 8, wherein the functional color material is in a tube shape and is wound around a measurement object . 11. The radiation detection system according to claim 8, wherein the functional color material includes a plurality of types of functional color materials that are changed in color at different radiation dose levels. . A standard color display unit that is arranged in the vicinity of the functional color material, is photographed by the television camera, and displays at least one standard color that does not change color depending on radiation dose;
Color calibration means for performing color calibration of the image of the functional color material by comparing video signals obtained by photographing the color of the functional color material and the standard color display unit with the television camera;
The radiation detection system according to claim 9, further comprising: The radiation detection system according to claim 12, further comprising means for calculating a radiation dose based on a result of the color calibration . In the vibration monitoring method for remotely monitoring the vibration of the measurement object,
A piezoelectric element; a light emitting element; a converter circuit comprising a detector, a capacitor, and a voltage comparison circuit connected in series to the piezoelectric element and the light emitting element, and converting an electromotive force of the piezoelectric element into a blinking cycle of the light emitting element; Attaching to a predetermined plurality of attachment locations of the measurement object;
A monitoring step of sequentially monitoring the blinking of the light emitting elements at the plurality of attachment points while remotely controlling the attitude of the TV camera remotely;
A vibration monitoring method . In a radiation detection method for detecting radiation remotely,
Placing a functional color material that changes color upon detection of a radiation dose above a certain level at a plurality of predetermined mounting locations;
The step of sequentially shooting the functional color material of the plurality of attachment points with the TV camera while remotely controlling the attitude of the TV camera remotely,
Remotely displaying the video of the television camera;
A radiation detection method comprising:

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