JP2018159661A - Vehicle contamination inspection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rapidly and accurately monitor a contamination state of a radioactive material on surfaces of a vehicle.SOLUTION: A vehicle contamination inspection device includes a gate-shape structure where a detector group is attached, including: first detectors arranged to be vertically and horizontally movable in response to a relative position with a vehicle so as to measure a radiation dose on both side surfaces of the vehicle; a second detector arranged to be vertically, rotatably, and horizontally movable in response to a relative position with the vehicle so as to measure a radiation dose on a front surface, a rear surface, an upper surface, and a loading space surface of the vehicle; and third detectors arranged to be vertically and horizontally movable in response to a relative position with the vehicle so as to measure a radiation dose on internal side surfaces of a loading space. The gate-shape structure is fixedly set. The device also includes a control section for identifying presence/absence of a contaminated part on the basis of a detection result obtained from the detector group while moving a pedestal base where a vehicle is placed to pass through the gate-shape structure.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a vehicle contamination inspection apparatus for monitoring a contamination state of a radioactive substance on a vehicle surface of a vehicle carrying a radioactive substance.

  There is a possibility that the radioactive material adheres to the vehicle surface of the vehicle that carries the transportation work within the site of the radioactive material handling facility. Therefore, in order to prevent the radioactive material from diffusing outside a certain area, it is possible to inspect the presence of radioactive material contamination (radioactive contamination) for vehicles that have finished work in the area and are about to leave the area. An apparatus is desired.

  There is a conventional technique for determining the presence or absence of radioactive contamination using such a vehicle as an inspection target (see, for example, Patent Document 1). In this patent document 1, the presence or absence of contamination is detected by the upper surface detection unit, the right side surface detection unit, and the left side surface detection unit in the movement unit while the movement unit is stopped. Then, the presence or absence of contamination on the top surface, the right side surface, and the left side surface of the vehicle is detected by moving the moving unit and repeatedly detecting the remaining portions.

  Moreover, this patent document 1 has detected the presence or absence of the contamination of the front surface and rear surface of a vehicle by the front surface detection part and rear surface detection part provided as a mechanism different from a moving part. As a result, the presence or absence of contamination on all surfaces of the vehicle to be inspected is detected, and contamination is detected for vehicles on which no contamination is detected on all of the front, rear, right, left and top surfaces. Judge that there is no.

JP 2014-120002 A

However, the prior art has the following problems.
The conventional device according to Patent Document 1 can detect the presence or absence of contamination on all of the front surface, rear surface, right side surface, left side surface, and top surface. However, detection of the presence or absence of contamination on the top, right, and left sides of the vehicle is performed by repeatedly moving and stopping the moving part, and a certain amount of time is required for one inspection in the stopped state. It has become. In particular, in the storage and decommissioning of radioactive materials that handle a large amount of radioactive materials or pollutable materials, transportation is performed using a large number of vehicles. There may be a traffic jam in the vehicle. Therefore, an apparatus capable of detecting the contamination state of a vehicle due to radioactivity at higher speed and with higher accuracy is desired.

  The present invention has been made to solve the above-described problems, and can monitor the contamination state of the radioactive material on the vehicle surface at a high speed and with high accuracy compared to the conventional apparatus, and a pedestal drive system. It is an object of the present invention to obtain a vehicle contamination inspection apparatus that can realize a remarkable effect that cannot be obtained when the portal drive system is adopted by adopting and performing automatic inspection.

  The vehicle contamination inspection apparatus according to the present invention quantitatively determines the contamination state of a vehicle to be measured and a portal type composed of a pair of vertical columns and a horizontal column connecting the upper ends of the pair of vertical columns. In order to measure the amount of radiation on the front, rear, both sides, top, and bedside of the vehicle, the vehicle is moved relative to the group of detectors arranged in the gate shape and the fixedly installed gate shape. A vehicle contamination inspection apparatus comprising a portal unit having a control unit that detects a quantity via a detector group and identifies a contamination location based on a detection result, the detector group being disposed on both sides of the vehicle In order to measure the radiation dose using the pair of first detectors arranged in the pair of vertical columns and the inner side surface of the loading platform surface of the vehicle as the measurement subject surface. A pair of 3rd attached to the horizontal column so that it can move up and down and left and right according to the shape of the loading platform In order to measure the radiation dose with the surface of the ejector and the front, rear, top, and cargo bed surfaces other than the inner side as the measurement target surface, it can be moved up and down and left and right in conjunction with the third detector. And a second detector attached to the horizontal column so as to be able to rotate and move so as to face the surface to be measured. Measurement is performed so that the detector group can be maintained at a predetermined distance from the measurement target surface of the vehicle that is attached to the gate shape and passes through the gate shape. A distance sensor for measuring a distance from the target surface, and the control unit externally transmits movement path data related to the base and the detector group defined based on known dimension data for specifying the position of the measurement target surface of the vehicle. Drive from pedestal As a result, the vehicle is moved relative to the gate type, and the movement path data is corrected according to the measurement result of the distance sensor, while the vertical position, depth position, vertical position of the second detector, horizontal position of the second detector. By controlling the rotational position and the vertical and horizontal positions of the third detector, the first detector, the second detector, and the third detector are positioned at a predetermined distance from the measurement target surface of the vehicle. It is moved continuously while being maintained, and the contaminated part is specified based on the detection result obtained through the detector group.

  According to the present invention, a vehicle whose relative position is corrected with respect to a portal unit fixedly provided with a detector group is passed while continuously moving, and the detector group is moved according to the passing position of the vehicle. In addition, the radiation amount of the vehicle surface and the loading platform can be inspected at high speed and with high accuracy. As a result, compared to the conventional device, the contamination state of the radioactive material on the vehicle surface can be monitored at high speed and with high accuracy, and the portal drive system is adopted by performing the automatic inspection using the pedestal drive system. It is possible to obtain a vehicle contamination inspection apparatus that can realize a remarkable effect that cannot be obtained in some cases.

BRIEF DESCRIPTION OF THE DRAWINGS It is a whole block diagram for demonstrating the outline | summary of the vehicle contamination inspection apparatus in Embodiment 1 of this invention. In Embodiment 1 of this invention, it is explanatory drawing which showed the base drive procedure at the time of the automatic inspection of a radiation dose being performed when the vehicle stopped on the base passes a portal unit. It is a functional block diagram of the vehicle contamination inspection apparatus in Embodiment 1 of this invention. It is explanatory drawing regarding the structure of the detector attached to the portal unit in Embodiment 1 of this invention. It is explanatory drawing regarding the structure of the 2nd detector in Embodiment 1 of this invention. It is the figure which put together the measurement site | part by the 1st detector, 2nd detector, and 3rd detector in Embodiment 1 of this invention. It is the figure which put together the comparison of the drive mechanism number of the base drive system in Embodiment 1 of this invention, and a portal drive system, and the number of control items. It is the figure which showed the screening facility area required in order to implement | achieve the vehicle contamination inspection apparatus by a portal drive system. It is the figure which showed the screening facility area required in order to implement | achieve the vehicle contamination inspection apparatus by the pedestal drive system in Embodiment 1 of this invention. It is the flowchart which put together the series of processes regarding the detection process of the radiation dose by the vehicle contamination inspection apparatus in Embodiment 1 of this invention. It is an example of a display of the radiation measurement result displayed on the monitoring monitor in Embodiment 1 of this invention.

Hereinafter, a preferred embodiment of a vehicle contamination inspection apparatus according to the present invention will be described in detail with reference to an example with reference to the drawings.
The present invention corrects the relative position of the vehicle stopped on the pedestal, passes the vehicle while moving the pedestal to the portal unit fixedly provided with the detector group, and according to the passing position of the vehicle. The technical feature is that the detector group can be moved to inspect the surface of the vehicle and the radiation dose on the loading platform at high speed and with high accuracy.

Embodiment 1 FIG.
FIG. 1 is an overall configuration diagram for explaining an overview of a vehicle contamination inspection apparatus according to Embodiment 1 of the present invention. FIG. 2 is an explanatory diagram showing a pedestal driving procedure when the radiation dose is automatically inspected by the vehicle parked on the pedestal passing through the portal unit in the first embodiment of the present invention. FIG. 3 is a functional block diagram of the vehicle contamination inspection apparatus according to Embodiment 1 of the present invention. The configuration and function of the vehicle contamination inspection apparatus according to the first embodiment will be described with reference to FIGS.

  In the measurement room 100 in the facility, the main controller 10, the portal unit 20, the pedestal 30, and the alarm 40 are arranged. Here, the alarm device 40 includes a speaker 41 and a display 42. The measurement chamber 100 is provided with shutters 101 and 102 that are opened and closed when the vehicle 300 to be inspected enters and exits.

  On the other hand, in the general monitoring room 200 provided at a location apart from the measurement room 100, the movement route data based on the dimension data of the vehicle to be inspected is generated and the inspection is executed. A monitoring monitor 50 for monitoring the contamination state of the radioactive substance is arranged. In addition, a vehicle information reading device 60 for reading the ID of a vehicle to be inspected is installed in the vicinity of the guiding path from the outside to the measurement chamber 100 and in front of the shutter 101.

  A plurality of inspection lanes each including the portal unit 20 and the pedestal 30 may be provided in the measurement chamber 100, and the plurality of inspection lanes may be integrated and managed by one main controller 10. is there. However, each of the plurality of lanes executes the same automatic inspection, and in the following description, the automatic inspection for one lane will be described in detail.

  The main controller 10 serves as a communication repeater between the portal unit 20 and the monitoring monitor 50. Accordingly, the monitoring monitor 50 can communicate with the portal unit 20 via the main control device 10 and can directly communicate with the vehicle information reading device 60.

  In addition, the pedestal 30 corrects the relative position of the vehicle 300 with respect to the portal unit 20 in a state where the vehicle 300 for performing the automatic inspection is stopped and mounted, and the vehicle 300 whose relative position is corrected is the gate 30. The drive is controlled so as to pass through the mold unit 20. In order to realize such drive control, the pedestal 30 includes a rotation drive mechanism unit 31, a front and rear drive mechanism unit 32, and a left and right drive mechanism unit 33. Details will be described with reference to FIGS. .

  Next, the driving procedure of the pedestal 30 when the vehicle 300 stopped on the pedestal 30 passes through the portal unit 20 and the radiation dose is automatically inspected will be described in detail with reference to FIG. The details of the drive control of the pedestal 30 will be described later with reference to FIG. 3, but are performed by the control unit 21 in the portal unit 20.

(Pedestal drive procedure 1) The initial rotation position of the vehicle 300 is corrected.
The portal unit 20 is fixedly arranged. On the other hand, the vehicle 300 that has entered the measurement chamber 100 to inspect the radiation dose stops on the pedestal 30 moved immediately before the portal unit 20. Therefore, the control unit 21 controls the amount of rotation by the rotation drive mechanism so that the front position of the vehicle 300 faces the portal unit 20.

  The initial position and the initial angle at which the vehicle 300 that has entered the measurement chamber 100 stops on the pedestal 30 can be defined in advance according to the distance from the measurement chamber 100 to each lane (for details, refer to FIG. 9). Will be described later). Therefore, the rotation amount in the pedestal drive procedure 1 by the rotation drive mechanism can be set in advance as a fixed value for each lane.

(Pedestal drive procedure 2) The left and right initial position correction of the vehicle 300 is performed.
After the rotational position is corrected in the pedestal driving procedure 1, the control unit 21 causes the pedestal 30 on which the vehicle 300 rides to a position where the front side of the vehicle 300 can be measured by the distance sensor provided in the portal unit 20. Move forward. And the control part 21 makes the distance to the right side of the vehicle 300 by the distance sensor equal to the distance to the left side so that the center position of the vehicle coincides with the center position of the portal unit 20. Controls the position of the left and right drive mechanism.

  The control unit 21 controls the position of the left and right drive mechanism so that the distance to the right side and the distance to the left side are equal, and then the distance to the right side at another position in the longitudinal direction of the vehicle. And whether the distance to the left side is equal. And the control part 21 performs position control of a rotation drive mechanism and a left-right drive mechanism so that the distance to the right side surface and the distance to the left side surface are equal at a plurality of positions. Complete 300 center alignments.

(Pedestal drive procedure 3) The vehicle 300 is driven and controlled in the front-rear direction with respect to the portal unit 20, and the radiation dose is measured.
After the position correction by the pedestal driving procedures 1 and 2, the control unit 21 controls the drive so that the vehicle 300 passes through the portal unit 20 by moving the pedestal 30 in the front-rear direction, and automatically measures the radiation dose. To do. Note that when performing automatic measurement in accordance with the pedestal driving procedure 3, the control unit 21 uses a plurality of detectors provided in the portal unit 20 according to the relative position of the vehicle 300 in the portal unit 20. It is necessary to perform movement control, and details will be described later with reference to FIGS.

  As illustrated in FIG. 3, the portal unit 20 includes a control unit 21, a radiation detector 22, a drive mechanism unit 23, and various sensors 24. Details of the function of the portal unit 20 will be described later.

  The pedestal 30 includes a rotation drive mechanism unit 31, a front / rear drive mechanism unit 32, and a left / right drive mechanism unit 33. These drive units 31 to 33 are driven and controlled by the control unit 21.

Next, an outline of a series of flows when the contamination state of the radioactive material of the vehicle 300 is inspected will be described with reference to FIGS.
(Step 1) Movement of Vehicle 300 and Initial Positioning First, after the vehicle information reading device 60 reads the ID, the vehicle 300 to be inspected passes through the shutter 101 and is the base of the target inspection lane. Move to position 30 and stop.

  Thereafter, the vehicle 300 is subjected to the pedestal driving procedures 1 and 2 described above, whereby the relative initial alignment with the portal unit 20 is completed.

(Step 2) Inspecting the contamination state of the radioactive substance for the vehicle 300 The monitoring monitor 50 in the general monitoring room 200 is based on the reading result of the vehicle information reader 60, and the position of the symmetrical measurement surface where the radioactivity should be detected. Using the portal unit 20, the front, rear, right side, left side, and top surface of the vehicle, as well as the truck bed (inside / side and bottom of the truck bed) and the driver's back of the truck to be inspected, Inspect for contamination of radioactive material.

  At this time, the pedestal driving procedure 3 described above is performed, and the vehicle 300 whose center alignment has been completed passes through the fixed portal unit 20, so that the vehicle 300 to be measured Contamination status is checked.

(Step 3) Subsequent processing according to the inspection result The monitoring monitor 50 in the general monitoring room 200 displays the inspection result after completion of the contamination state inspection using the portal unit 20, and based on the inspection result. When it is determined that all surface contamination states are normal, the vehicle 300 to be inspected is allowed to move out of the area. As a result, the vehicle 300 passes through the shutter 102 and exits from the measurement chamber 100.

  On the other hand, if a contamination state is detected even at one location, the monitoring monitor 50 determines that the surface contamination state is abnormal, notifies the contamination and prompts decontamination, and Allow movement to. Such notification can be implemented by providing a speaker 41 and a display 42 for each lane. As a result, the vehicle 300 passes through the shutter 102 and exits from the measurement chamber 100.

Therefore, when the above-described steps 1 to 3 are summarized, the monitoring monitor 50 controls the speaker 41 and the display device 42 that are alarm devices to guide, stop, and exit the vehicle 300 to be inspected as follows. be able to.
Before the contamination state is measured, the monitoring monitor 50 appropriately notifies the vehicle 300 to be inspected by appropriately notifying the vehicle driver by the sound output from the speaker 41 and the display output from the display 42. Guide to the correct position and stop.
After the contamination state is measured, the monitoring monitor 50 measures the inspected vehicle 300 by appropriately notifying the driver of the vehicle by the sound output from the speaker 41 and the display output from the display 42. Leave the room 100.

  The vehicle contamination inspection apparatus according to the present invention has a plurality of inspection modes, for example, modes in which the measurement sensitivity and accuracy of surface contamination can be arbitrarily selected by selecting detector positions at arbitrary intervals from an arbitrary inspection speed and vehicle surface. Have. Details of the display contents and the inspection mode will be described later.

Next, features of the vehicle contamination inspection apparatus according to the present invention will be described. The technical features of the present invention are summarized in the following two points.
(Characteristic 1) Use of a portal unit to increase the speed and accuracy of inspection (Characteristic 2) Improvement of apparatus performance by devising a control method Therefore, these two characteristics will be described in detail below.

(Characteristic 1) High speed and high accuracy inspection by adopting a portal unit This application corrects the relative position of a vehicle stopped on the pedestal 30 and is fixedly arranged with a detector group. The structure in which the vehicle 300 is passed while the pedestal 30 is moved with respect to 20 and the detector group is moved according to the passing position of the vehicle 300 to inspect the surface of the vehicle 300 and the radiation dose on the loading platform at high speed and with high accuracy. It is a technical feature that has

  FIG. 4 is an explanatory diagram relating to the configuration of the detector group attached to the portal unit 20 according to Embodiment 1 of the present invention. As illustrated in FIG. 4, the portal unit 20 includes a pair of first detectors 25, a second detector 26, and a pair of third detectors 27.

  FIG. 5 is an explanatory diagram relating to the configuration of the second detector 26 according to Embodiment 1 of the present invention. In addition, in FIG. 5, although the mode that the 2nd detector 26 rotates is shown, although illustration is abbreviate | omitted also about the 1st detector 25 and the 3rd detector 27, as demonstrated below, It is configured to be rotatable.

  Here, the pair of first detectors 25 are detectors for detecting the contamination state of the vehicle body side surface of the vehicle 300. And a pair of 1st detector 25 is arrange | positioned inside a pair of vertical column which comprises the portal unit 20 as shown in FIG. Further, the pair of first detectors 25 are movable in order to optimize the start position of the inspection in accordance with the vehicle height of the vehicle 300. During the inspection, the first detector 25 is constant from the surface according to the vehicle shape of the vehicle 300. It has a structure that can move while maintaining the interval. Further, for example, when it is desired to detect the contamination state at the corner portion of the vehicle body side surface of the vehicle 300, it can be dealt with by rotating the detection surface of the first detector 25.

  For example, as shown in FIG. 5, the second detector 26 includes a first state in which the detection surface is directed in the 90 ° direction, a second state in which the detection surface is directed in the 0 ° direction, and a detection surface in the −90 ° direction. It is configured to be freely displaceable between the third state directed in the direction. And the 2nd detector 26 detects the contamination state of the vehicle body front surface of a vehicle 300, a vehicle body rear surface, a driver's seat ceiling surface, a driver's seat back surface, a loading platform bottom surface, and a loading platform rear surface.

  The pair of third detectors 27 are detectors for detecting a contamination state of the side surface inside the loading platform of the vehicle 300. The pair of third detectors 27, together with the second detectors 26, can move in the height direction according to the shape of the vehicle 300. During the inspection, the pair of third detectors 27 can be adjusted according to the inclination of the vehicle 300 and the vehicle shape. The structure is movable while maintaining a certain distance from the surface. Furthermore, the second detector 26 can be freely displaced according to the shape of the vehicle 300. Further, for example, when it is desired to detect the contamination state at the corner portion inside the loading platform of the vehicle 300, it can be handled by rotating the detection surface of the third detector 27.

  Further, the second detector 26 and the pair of third detectors 27 are disposed on the horizontal pillars provided between the upper ends of the pair of vertical pillars constituting the portal unit 20, and can be displaced as described above. It has a mechanism.

  FIG. 6 is a diagram summarizing the measurement sites by the first detector 25, the second detector 26, and the third detector 27 in the first embodiment of the present invention. The vehicle contamination inspection apparatus according to the first embodiment uses the portal unit 20 and continuously moves the vehicle surface by adjusting the height and direction of the detector to a predetermined interval according to the shape of the vehicle. Contamination status can be measured continuously.

  As a result, it is possible to significantly reduce the measurement time of the contamination state of the vehicle surface as compared with the conventional technique such as Patent Document 1, and further, the contamination state is accurately detected with a fine pitch resolution with a constant short side direction of the detector. Measurements can be made faster, and inspections can be made faster and more accurate.

(Characteristic 2) Improvement of apparatus performance by devising control method The vehicle contamination inspection apparatus according to the first embodiment is based on the control method based on the driving mechanism and software processing in addition to the high performance described in the characteristic 1. Compared to such conventional technology, higher speed and higher performance are realized, which will be described in detail below.

[1] Realization of high speed by continuous inspection In the present application, the vehicle 300 to be measured is limited, and the dimension data is associated with the vehicle ID and stored in advance in the storage unit of the monitoring monitor 50. ing. As a vehicle to be limited, for example, two types of vehicles, a 10t dump truck and a 10t flat body vehicle, can be considered.

  Therefore, the monitoring monitor 50 in the general monitoring room 200 specifies the surface shape of the vehicle to be measured by reading out the dimension data corresponding to the vehicle ID read by the vehicle information reading device 60 from the storage unit. Can do.

  Furthermore, although detailed illustration is abbreviate | omitted in FIGS. 1-3, the portal unit 20 is provided with the distance sensor, the safety sensor, and the vehicle position sensor as the various sensors 24. FIG.

  The vehicle position sensor is a sensor for measuring the inclination of the vehicle 300 stopped on the pedestal 30 with respect to the traveling direction. The inclination information measured by the vehicle position sensor is transmitted to the monitoring monitor 50 in the general monitoring room 200 via the main control device 10 by communication. Note that the method of measuring the tilt may be a method using a camera.

  Then, the monitoring monitor 50 moves the radiation detector 22 from the surface of the vehicle 300 stopped on the pedestal 30 so as to be a fixed distance from the dimension data and the inclination information acquired with respect to the vehicle to be measured. Generate data. The generated travel route data is transmitted to the control unit 21 in the portal unit 20 via the main control device 10.

  The distance sensor is a sensor that quantitatively measures the distance from the vehicle surface so that the radiation detector 22 can maintain a position away from the vehicle surface by a predetermined distance. Then, the control unit 21 moves the pedestal 30 on which the vehicle 300 is stopped based on the movement route data acquired from the monitoring monitor 50, and the first detector according to the relative position of the vehicle 300 and the portal unit 20. The drive mechanism unit 23 controls the position, height, depth, height of the second detector 26, left and right positions, angles, height of the third detector 27, and left and right positions.

  As a result, the control unit 21 appropriately positions the pair of first detectors 25, the second detectors 26, and the pair of third detectors 27 according to the relative positions of the vehicle 300 and the portal unit 20. Therefore, continuous inspection can be realized without stopping the radiation detector 22. Further, the pair of third detectors 27 can inspect the contamination state on the inner side surface of the loading platform, and eliminate the blind spot in the measurement direction.

  In addition, by enabling continuous inspection, it is not necessary to specify a contaminated part that spans a plurality of areas that are stopped and measured as in Patent Document 1, and the size of the contaminated part is easily specified. be able to.

  Furthermore, the control unit 21 can prevent the radiation detector 22 from coming into contact with the vehicle 300 or the like during the continuous inspection by reading the signal from the safety sensor.

[2] Merits of driving the pedestal 30 on which the portal unit is fixed and the parked vehicle is mounted. The following two methods are considered to inspect the entire surface of the vehicle 300 using the portal unit 20. It is done.
(Method 1) Portal Drive Method A method of moving the portal unit 20 while the vehicle 300 is stopped.
(Method 2) Pedestal Drive Method A method of moving the stationary vehicle 300 on the pedestal 30 while the portal unit 20 is fixed.

  In the present invention, the pedestal drive method based on the latter method 2 is adopted, and the merits thereof will be described below. In Method 2, as described in the pedestal driving procedures 1 and 2, the vehicle 300 can be initially aligned with the center of the portal unit 20 by rotating and moving the pedestal 30 on which the vehicle 300 is placed to the left and right. . From this, Method 2 can obtain the following effects 1 to 3.

<Effect 1> Since the vehicle and the bed width of the 10t dump truck are substantially constant, for the detectors 25 and 27, the vehicle between the detector and the vehicle surface, and between the detector and the inside and side surfaces of the carrier in the lateral direction. Although distance correction is necessary, lateral distance control is not necessary.
<Effect 2> The detector 26 can also be lowered to a predetermined position, and lateral position control is not necessary.
<Effect 3> A driving mechanism for portal driving is not required.

  In addition, about the detectors 26 and 27, the distance control function with a loading platform bottom face (up-down direction) is required. The “lateral direction” and “vertical direction” in the above description are shown as double arrows in FIG.

  On the other hand, by adopting the pedestal driving method of Method 2, in order to place the vehicle 300 in a straight center with respect to the portal unit 20, left and right and rotation angle control of the pedestal 30 is required. Furthermore, traveling control of the pedestal 30 according to the vertical drive of each detector is required.

FIG. 7 is a table summarizing a comparison of the number of drive mechanisms and the number of control items between the pedestal drive method and the portal drive method according to Embodiment 1 of the present invention. In FIG. 7, “◯”, “X”, and “Δ” indicate the following meanings.
○: Required items for drive mechanism or distance (or position) control ×: Items not required for drive mechanism or distance (or position) control Δ: Items that can be optionally added as drive mechanism or distance (or position) control

  When the effects 1 to 3 described above are summarized, as shown in FIG. 7, when the portal drive system is changed to the pedestal drive system, the number of drive mechanisms is reduced from 9 to 8, and the number of distance controls is also increased from 9 to 6. It turns out that it reduces to Formula.

  As another effect, by adopting the pedestal drive system, it is possible to realize a reduction in the screening facility area as compared with the case where the portal drive system is employed. FIG. 8 is a diagram showing a screening facility area necessary for realizing a vehicle contamination inspection apparatus using a portal drive system. On the other hand, FIG. 9 is a diagram showing a screening facility area necessary for realizing the vehicle contamination inspection apparatus based on the pedestal drive system according to the first embodiment of the present invention.

  In order to allow the vehicle to enter straight into the vehicle screening facility using the portal drive system, it is necessary to secure a certain vehicle turning radius. Here, when the portal drive system is adopted, as shown in FIG. 8, it is necessary to secure a vehicle turning radius in order to guide the vehicle 300 straight to the portal unit 20.

  On the other hand, when the pedestal driving method according to the first embodiment is adopted, as shown in FIG. 9, in order to guide the vehicle 300 straight with respect to the portal unit 20, The rotation mechanism can be used effectively, and it is not necessary to secure the vehicle rotation radius required in the portal drive system. As a result, the area of the screening facility can be reduced.

  The travel span of the pedestal 30 on which the vehicle 300 is placed is extended to the exit side, and the pedestal 30 can be rotationally driven even after the inspection, thereby reducing the area of the screening facility even with respect to the exit area on the exit side. be able to.

[3] Arbitrary setting of inspection accuracy (detection limit) The vehicle contamination inspection apparatus of the present embodiment can freely set the scanning speed of the detector and the distance between the detector and the detection target, and thereby the inspection accuracy of the system ( Detection limit) can be set.

  Next, a series of processes for automatic inspection by the pedestal drive method will be specifically described with reference to a flowchart. FIG. 10 is a flowchart summarizing a series of processes related to a radiation dose detection process performed by the vehicle contamination inspection apparatus according to the first embodiment of the present invention. First, in step S <b> 1001, the monitoring monitor 50 reads the ID of the vehicle 300 to be measured, acquired from the vehicle information reading device 60 via communication.

  Next, in step S1002, the monitoring monitor 50 determines whether or not the vehicle 300 to be measured is an inspectable vehicle in which dimension data is registered in advance based on the read ID. If the monitoring monitor 50 determines that the vehicle is not inspectable, it proceeds to step S1003 to notify that it is necessary to manually measure the radiation dose, and ends the series of processes.

  On the other hand, if the monitoring monitor 50 determines that the vehicle is an inspectable vehicle, the process proceeds to step S1004 to notify the vehicle 300 to the measurement chamber 100, and the vehicle 300 enters the measurement chamber 100 to respond. Stop in front of the inspection lane. On the other hand, the control unit 21 performs initial positioning of the vehicle 300 with respect to the portal unit 20 by executing the pedestal driving procedures 1 and 2 described above.

  Further, in step S1005, the monitoring monitor 50 transmits the movement route data generated by the monitoring monitor 50 to the portal unit 20, and instructs the measurement of the radiation dose of the vehicle 300. On the other hand, the control unit 21 executes the pedestal driving procedure 3 described above, thereby performing position control of the radiation detector 22 while controlling the vehicle 300 to be driven in the front-rear direction with respect to the portal unit 20. Measure quantity.

  In step S1005, as an example of a desired inspection mode, one of the following two types of inspection modes, high-speed inspection and high-precision inspection, may be selected.

For example, when executing a high-speed inspection in step S1005, the control unit 21 moves the radiation detector 22 at a speed and a position from the vehicle surface that can reliably measure surface contamination of 40 Bq / cm ² or more. However, continuous inspection will be performed. On the other hand, when executing the high-accuracy inspection, the control unit 21 has, for example, sensitivity and accuracy capable of measuring surface contamination of ⁴ Bq / cm ² or more, at a lower speed than the previous high-speed inspection mode, and The continuous inspection is performed while moving the radiation detector 22 at the approached position.

  In step S1006, the monitoring monitor 50 relays the main control device 10, receives the inspection result from the portal unit 20, and proceeds to step S1007 when determining that the surface contamination state is normal. A notification for guiding 300 to the outside of the measurement chamber 100 is performed, and a series of processing is completed.

  On the other hand, if the monitoring monitor 50 determines in step S1006 that the surface contamination state is abnormal from the received inspection result, the monitoring monitor 50 proceeds to step S1008 to display the contaminated portion on the monitoring monitor 50, as well as the speaker 41 and the display device. At 42, a notification of contamination and a notification of prompting decontamination are performed. Then, it progresses to step S1007, the alerting | reporting which guides the vehicle 300 out of the measurement chamber 100 is performed, and a series of processes are complete | finished.

  In this way, by selecting a desired inspection mode in a timely manner, it is possible to inspect the entire surface at high speed and with high accuracy and to determine the contamination state. As a result, it is possible to reliably prevent a vehicle contaminated with a radioactive material exceeding the reference value from going out of the area.

  Furthermore, by performing the automatic inspection by the pedestal drive method, as described above, it is possible to realize an excellent effect compared to the automatic inspection by the portal drive method.

  FIG. 11 is a display example of the radiation measurement result displayed on the monitor 50 according to Embodiment 1 of the present invention. On the monitoring monitor 50, six pieces of information of the first display area 51 to the sixth display area 56 as illustrated in FIG. 11 can be displayed.

(1) First display area 51
This is an area for displaying ID information of the vehicle 300 to be measured. Based on this display content, the operator and the monitor 50 can identify the vehicle to be measured.

(2) Second display area 52
This is an area for displaying whether the communication state of each of the portal unit 20 and the main controller 10 in Embodiment 1 of the present invention is normal or abnormal. From this display content, the operator can easily grasp the communication state for each part.

(3) Third display area 53
As a result of the contamination state of the vehicle 300, the short side direction of the detector is an area where the presence / absence of a contaminated portion is displayed with a constant and fine pitch resolution. From this display content, the operator and the monitor 50 can surely grasp whether or not there is a contaminated portion as a whole vehicle.

(4) Fourth display area 54
This is an area where the position of the measurement location is displayed as a serial number. With this display content, the operator can easily grasp the correspondence relationship with the display content of the fifth display area 55 and the sixth display area 56 described later.

(5) Fifth display area 55
This is an area for graphically displaying inspection results relating to the vehicle surface. With this display content, the operator can easily specify the portion determined as the contaminated portion by the surface inspection, and can efficiently perform the decontamination work. In the example of FIG. 11, in the fifth display area 55, a black-filled rectangular portion corresponds to a portion detected as a contaminated portion.
(6) Sixth display area 56
This is an area for graphically displaying the inspection result relating to the inside of the cargo bed. With this display content, the operator can easily identify the portion determined as a contaminated location in the loading platform inspection, and can efficiently perform the decontamination work. In the example of FIG. 11, a black-filled rectangular portion in the sixth display area 56 corresponds to a portion detected as a contaminated portion.

  In the specific example shown in FIG. 11, the fourth display area 54 displays a perspective view of the vehicle to be inspected as viewed from the front and rear, and the serial numbers of the positions of the measurement points are overlapped. It is displayed. Further, in the fifth display area 55 and the sixth display area 56, the vehicle to be inspected is displayed in an orthographic view (or a diagram obtained by the third trigonometric method), and a contaminated portion based on the inspection result is overlapped. Is displayed.

  And such a perspective view and an orthographic projection figure are matched with vehicle ID, and can be memorize | stored beforehand with the dimension data in the memory | storage part which the monitoring monitor 50 has. Accordingly, the monitoring monitor 50 reads out a perspective view and an orthographic projection corresponding to the vehicle ID information read by the vehicle information reading device from the storage unit and displays them in the respective display areas, and further, contamination based on the inspection results. The location can be displayed in an overlapping manner.

  As a result, the operator can quickly identify the contaminated portion by looking at the display contents of the fourth display area 54, the fifth display area 55, and the sixth display area 56.

  The orthographic views displayed in the fifth display area 55 and the sixth display area 56 are two-dimensional representations such as a front view, a top view, and a side view, but three-dimensional representations viewed from a plurality of viewpoints. It is also possible to adopt and display in the fifth display area 55 and the sixth display area 56.

  As described above, according to the first embodiment, the surface of the vehicle and the loading platform are moved while the detector is continuously moved by improving the hardware performance of the radiation detector and devising the control method using the drive mechanism and software processing. Can be inspected at high speed and with high accuracy, and the contaminated part can be identified.

  Furthermore, by adopting the pedestal drive method, it is possible to reduce the number of drive mechanisms and the number of control items as compared to the case of adopting the portal drive method, and it is possible to reduce the screen facility area .

  DESCRIPTION OF SYMBOLS 10 Main controller, 20 Portal unit, 21 Control part, 22 Radiation detector, 23 Drive mechanism part, 24 Various sensors, 25 1st detector, 26 2nd detector, 27 3rd detector, 30 base, 31 Rotation drive mechanism, 32 Front / rear drive mechanism, 33 Left / right drive mechanism, 40 Alarm, 41 Speaker, 42 Display, 50 Monitor, 51 First display area, 52 Second display area, 53 Third display area, 54 4th display area, 55 5th display area, 56 6th display area, 60 Vehicle information reader, 100 Measurement room, 101, 102 Shutter, 200 General monitoring room, 300 Vehicle.

Claims (6)

A gate type composed of a pair of vertical columns and a horizontal column connecting the upper ends of the pair of vertical columns;
In order to quantitatively measure the pollution state of the vehicle to be measured, a group of detectors arranged in the gate shape,
By moving the vehicle with respect to the gate type fixedly installed, the radiation amount of the front surface, rear surface, both side surfaces, the upper surface, and the loading platform surface of the vehicle is detected via the detector group and detected. A vehicle contamination inspection device comprising a portal unit having a control unit for identifying a contamination location based on a result,
The detector group is:
A pair of first detectors disposed on the pair of vertical columns in order to measure the radiation dose with both side surfaces of the vehicle as measurement target surfaces;
A pair of third detectors attached to the horizontal column so as to be movable up and down and left and right in accordance with the shape of the platform of the vehicle, in order to measure the radiation dose with the inner side surface of the platform surface of the vehicle as a measurement target surface; ,
In order to measure the radiation dose with the surface other than the inner side surface among the front surface, the rear surface, the upper surface, and the loading platform surface of the vehicle as a measurement target surface, it can be moved up and down and left and right in conjunction with the third detector. And a second detector attached to the horizontal column so as to be rotationally movable so as to face the measurement target surface.
A pedestal provided with a drive mechanism for moving the vehicle relative to the gate type fixedly installed in a state where the stopped vehicle is on board;
A distance that is attached to the gate shape and measures a distance from the measurement target surface so that the detector group can maintain a predetermined distance from the measurement target surface of the vehicle that passes through the gate shape. A sensor and
The control unit obtains from the outside movement path data related to the pedestal and the detector group that are defined based on known dimension data that specifies the position of the measurement target surface of the vehicle, and drives and controls the pedestal. While moving the vehicle relative to the portal shape and correcting the movement path data according to the measurement result of the distance sensor, the vertical position, depth position, and vertical position of the second detector The first detector, the second detector, and the third detector are placed on the measurement target surface of the vehicle by controlling the left and right positions, the rotation position, and the vertical and horizontal positions of the third detector. A vehicle contamination inspection device that continuously moves while maintaining a position away from the predetermined distance, and identifies the contamination location based on a detection result obtained through the detector group. It further comprises a monitoring monitor for overall control of the control unit in the portal unit,
The monitoring monitor transmits the movement route data to the portal unit, outputs a radiation dose detection command to the control unit, and from a detection result received from the control unit as a response to the detection command. The vehicle contamination inspection apparatus according to claim 1, wherein a contamination location of the vehicle is specified. 3. The vehicle contamination according to claim 2, wherein when the detection result includes data indicating the contaminated portion, the monitoring monitor has a notification function for displaying the contaminated portion on a screen and prompting decontamination. Inspection device. A vehicle information reader for reading ID information of the vehicle to be measured;
A storage unit that stores in advance vehicle dimension data associated with the ID information;
The monitoring monitor acquires the dimension data of the vehicle to be measured by taking out the dimension data corresponding to the ID information read by the vehicle information reading device from the storage unit, and the movement route data is obtained. The vehicle contamination inspection device according to claim 2 or 3. A vehicle information reader for reading ID information of the vehicle to be measured;
A storage unit that stores in advance an orthographic view of the vehicle associated with the ID information;
The monitoring monitor takes out the orthographic projection of the vehicle corresponding to the ID information read by the vehicle information reading device from the storage unit, displays it on the screen, and superimposes the contaminated portion on the orthographic projection. The vehicle contamination inspection device according to claim 3, wherein the position of the contaminated portion is visually identified by displaying the same together. A vehicle information reader for reading ID information of the vehicle to be measured;
A storage unit that stores in advance a diagram of a three-dimensional representation of the vehicle viewed from a plurality of viewpoints, which is associated with the ID information;
The monitoring monitor takes out a diagram of a three-dimensional representation of the vehicle corresponding to the ID information read by the vehicle information reading device from the storage unit, displays the figure on the screen, and displays the contaminated portion in the three-dimensional representation. The vehicle contamination inspection apparatus according to claim 3, wherein the position of the contaminated portion is visually identified by displaying the image in a superimposed manner.

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