Device for detecting radioactive contamination on inner surface of object

Abstract

The invention discloses an object inner surface radioactive contamination detection device, and relates to the technical field of radiation measurement equipment, the appearance of a detection assembly is designed according to the shape of an inner cavity, a gap between a detection surface and a detected surface is uniform, and the interior of a to-be-detected object can be comprehensively detected. Modularized design is adopted, maintenance is convenient, and the detection assembly can be independently used as a detection device and can also be matched with a display unit to improve man-machine interaction performance. The rapid detection of the pollution of the inner cavity of the to-be-detected object can be realized. Meanwhile, the device is simple in principle, convenient to operate, high in detection efficiency and capable of positioning the pollution position. And large-area popularization and application are worthy.

Description

Technical Field

[0001] The invention relates to the technical field of radiation measurement equipment, and in particular to a device for detecting radioactive contamination on the inner surface of an object. Background Art

[0002] Radiation monitoring refers to the process of measuring the radiation intensity of radionuclides in the environment and analyzing and evaluating the radioactive contamination status. Its purpose is to determine the level of radioactive substances in the environment and the possible harm to the environment and people, so as to take safety measures. It is generally divided into workplace monitoring, effluent monitoring, personal monitoring, emergency monitoring, pollution source monitoring and background monitoring. The measurement items include: total radioactive activity measurement, surface contamination measurement and gamma radiation dose rate measurement. According to the object of measurement, it can be divided into radionuclide measurement of water, air, soil, sediment, rock, building materials, waste residue and organisms. Commonly used measurement methods include nuclear physics method and radiochemistry method.

[0003] In the existing technology, radioactive contamination monitoring equipment mainly measures the outer surface of the contaminated object (β rays), while the contamination of the inner surface is often ignored. Although the use of portable detection instruments can realize the inner cavity measurement of some objects to be tested (direct measurement), it still cannot solve the following problems:

[0004] 1. When the inner cavity space is irregular or limited, the portable instrument may not be able to penetrate into the inner cavity for detection or there may be a detection blind area.

[0005] 2. Low detection efficiency and unreliable results. Handheld detectors are used to detect the inner cavity, which takes a long time and is prone to missing certain areas. The detection work is arduous for a large number of objects to be tested.

[0006] 3. The pollution location cannot be automatically recorded and fed back. Summary of the invention

[0007] In view of the above problems, the present invention provides a device for detecting radioactive contamination on the inner surface of an object, which is used to overcome the above problems or at least partially solve the above problems.

[0008] The present invention provides the following scheme:

[0009] A device for detecting radioactive contamination on the inner surface of an object, comprising:

[0010] A mounting frame, the mounting frame is used to carry various components;

[0011] A detection component, the detection component includes a data acquisition mainboard, a plurality of data acquisition boards, a probe housing, a probe back plate and a plurality of detection units, each of the detection units includes an end window type GM tube; the probe housing is connected to the mounting frame; the data acquisition mainboard and the plurality of data acquisition boards are connected to the rear end of the detection unit through the probe back plate; the plurality of data acquisition boards are used to convert the rays collected by the plurality of detection units into electrical signals one by one, and the data acquisition mainboard is used to process the electrical signals corresponding to the respective detection units so as to obtain the detection results corresponding to the respective detection units;

[0012] Among them, the external contour structure of the probe housing is adapted to the contour shape of the inner surface of the object to be measured; and a plurality of the detection units are arranged on the top and circumference of the probe housing so that the gap between the detection surface formed by the plurality of the detection units and the measured surface formed by the inner surface of the object to be measured is uniform.

[0013] Preferably: the detection assembly further comprises a wire shielding plate connected to the probe housing and a photoelectric sensor, the photoelectric sensor being used to detect whether the object to be detected is in place, and after the photoelectric sensor detects that the object to be detected is in place, it triggers a plurality of the detection units to perform detection.

[0014] Preferably: the end window type GM tube included in each detection unit is packaged by a steel mesh.

[0015] Preferably: it also includes a calibration source unit, which includes a source frame body, an iron core screw, a circular magnetic sheet, a double-sided tape and a radiation source; the radiation source is attached to the source frame body by the double-sided tape, and the circular magnetic sheet is connected to the source frame body by the iron core screw; the circular magnetic sheet is used to adsorb with the steel mesh to realize the calibration of each channel.

[0016] Preferably, the data acquisition mainboard and the data acquisition board are both connected to the probe back plate via board mounting studs.

[0017] Preferably, it also includes a sheath pressing frame and a dustproof sheath, wherein the sheath pressing frame is connected to the mounting frame in a magnetic manner so as to press the dustproof sheath onto the surface of the detection assembly.

[0018] Preferably: it also includes a flip limit assembly, which is hinged to the mounting frame through a damping hinge; the object to be detected includes a safety helmet, and the flip limit assembly is used to press the brim of the safety helmet, and the safety helmet is fixed to the detection assembly by relying on the damping hinge.

[0019] Preferably, the mounting frame has a wedge structure, and after the mounting frame is connected to the vertical wall, the hanging surface of the detection assembly connected to the object to be detected is in an inclined state.

[0020] Preferably: it also includes a display unit, which is communicably connected to the data acquisition mainboard, and the display unit can display the detection results corresponding to each of the detection units. A connector is provided on the mounting frame, and the connector is used to realize the communicative connection between the data acquisition mainboard and the display unit and the connection with the power supply.

[0021] Preferably: a speaker and an alarm light are provided on the mounting frame. When the display unit is not in use or not configured, the speaker is used to provide operation reminders to the user, and the speaker and the alarm light can provide sound and light alarm reminders.

[0022] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0023] The embodiment of the present application provides a device for detecting radioactive contamination on the inner surface of an object. The shape of the detection component is designed according to the shape of the inner cavity. The gap between the detection surface and the detected surface is uniform, and the inside of the object to be detected can be fully detected. The modular design is adopted, which is convenient for maintenance. The detection component can be used as a detection device alone, and can also be used with a display unit to improve the human-computer interaction performance. It can realize rapid detection of contamination in the inner cavity of the object to be detected. At the same time, the device has a simple principle, is easy to operate, has high detection efficiency and can locate the contamination position. It is worthy of large-scale promotion and use.

[0024] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is a schematic structural diagram of a device for detecting radioactive contamination on the inner surface of an object provided by an embodiment of the present invention;

[0027] Figure 2 is a side view of a device for detecting radioactive contamination on the inner surface of an object provided by an embodiment of the present invention;

[0028] Figure 3 is a front view of a detection assembly provided by an embodiment of the present invention;

[0029] Figure 4is a cross-sectional view of the WW surface of the detection assembly provided by an embodiment of the present invention;

[0030] Figure 5 is a schematic structural diagram of a calibration source unit provided by an embodiment of the present invention;

[0031] Figure 6 is a partial enlarged schematic diagram of I provided in an embodiment of the present invention;

[0032] Figure 7 It is an electrical control block diagram provided by an embodiment of the present invention.

[0033] In the figure: mounting frame 1, detection component 2, data acquisition mainboard 21, data acquisition board 22, probe housing 23, probe back plate 24, detection unit 25, wire shielding plate 26, photoelectric sensor 27, steel mesh 28, board mounting studs 29, calibration source unit 3, source frame body 31, iron core screw 32, circular magnetic sheet 33, double-sided tape 34, radiation source 35, sheath pressure frame 4, dustproof sheath 5, flip limit assembly 6, display unit 7. DETAILED DESCRIPTION

[0034] The technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0035] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , is a device for detecting radioactive contamination on the inner surface of an object provided by an embodiment of the present invention, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the device may include:

[0036] A mounting frame 1, the mounting frame 1 is used to carry various components;

[0037] A detection component 2, the detection component 2 includes a data acquisition mainboard 21, a plurality of data acquisition boards 22, a probe housing 23, a probe back plate 24 and a plurality of detection units 25, each of the detection units 25 includes an end window type GM tube; the probe housing 23 is connected to the mounting frame 1 through the probe back plate 24; the data acquisition mainboard 21 and the plurality of data acquisition boards 22 are connected to the rear end of the detection unit 25 through the probe back plate 24; the plurality of data acquisition boards 22 are used to convert the rays collected by the plurality of detection units 25 into electrical signals one by one, and the data acquisition mainboard 21 is used to process the electrical signals corresponding to the respective detection units 25, so as to obtain the detection results of the corresponding positions of the respective detection units 25;

[0038] Among them, the external contour structure of the probe housing 23 is adapted to the contour shape of the inner surface of the object to be measured; a plurality of the detection units 25 are arranged on the top and circumference of the probe housing 23 so that the gap between the detection surface formed by the plurality of the detection units 25 and the measured surface formed by the inner surface of the object to be measured is uniform.

[0039] The device for detecting radioactive contamination on the inner surface of an object provided in the embodiment of the present application can realize rapid detection of inner surface contamination. It adopts modular design and is easy to maintain. The detection component 2 can be used alone as a detection device, and can also be used with the display unit 7 to improve the human-computer interaction performance; the appearance of the detection component 2 is designed according to the shape of the inner cavity, and the gap between the detection surface and the detected surface is uniform. Each channel has an independent scale, which can display the location of contamination; fault location, description, and analysis can be performed; and pollution alarm classification can also be achieved. In addition, log files can be stored, including measurement records, fault records, alarm records, regular test reports, etc.

[0040] It can be understood that when the device provided in the embodiment of the present application is in use, the detection component 2 can start to be detected after being connected to the object to be detected. In order to detect whether the detection component 2 is connected to the object to be detected, the embodiment of the present application can provide that the detection component 2 also includes a wire shielding plate 26 connected to the probe housing 23 and a photoelectric sensor 27. The photoelectric sensor 27 is used to detect whether the detection component 2 is connected to the object to be detected, so as to trigger a plurality of the detection units 25 to perform detection after the photoelectric sensor 27 detects that the detection component 2 is connected to the object to be detected.

[0041] The detection assembly 2 provided in the embodiment of the present application includes a plurality of independent detection units 25, each detection unit 25 includes an end window type GM tube. In order to facilitate the installation of the end window type GM tube, the embodiment of the present application can also provide that each of the end window type GM tubes contained in each of the detection units 25 is respectively encapsulated by a steel mesh 28.

[0042] In order to facilitate the calibration of the detection component 2, the embodiment of the present application can also provide a calibration source unit 3, which includes a source frame body 31, an iron core screw 32, a circular magnetic piece 33, a double-sided tape 34 and a radiation source 35; the radiation source 35 is adhered to the source frame body 31 through the double-sided tape 34, and the circular magnetic piece 33 is connected to the source frame body 31 through the iron core screw 32; the circular magnetic piece 33 is used to adsorb with the steel mesh 28 to realize the calibration of each channel.

[0043] The device provided by the present application uses a plurality of data acquisition boards 22 to collect data from each detection unit 25 in a one-to-one correspondence, so that the data acquisition mainboard 21 can analyze the data obtained by each data acquisition board 22, and finally obtain the detection result of each detection unit 25. In order to realize the quick and stable installation of the data acquisition mainboard 21 and the data acquisition board 22, the embodiment of the present application can provide that the data acquisition mainboard 21 and the data acquisition board 22 are connected to the probe back plate 24 through the board installation studs 29.

[0044] In order to protect the detection component 2, the embodiment of the present application may provide a sleeve pressing frame 4 and a dustproof sleeve 5. The sleeve pressing frame 4 is connected to the mounting frame 1 by magnetic attraction so as to press the dustproof sleeve 5 against the surface of the detection component 2.

[0045] It is understandable that the device provided in the embodiment of the present application can be used to detect the inner surfaces of various different objects to be tested. When manufacturing the detection component 2, it is only necessary to set the outer contour of the detection component 2 according to the structure of the inner surface of the object to be tested. In order to facilitate the connection of the probe housing 23 with the object to be tested, the embodiment of the present application can provide a flip limit component 6, and the flip limit component 6 is hinged to the mounting frame 1 through a damping hinge; the object to be tested includes a helmet, and the flip limit component 6 is used to press the brim of the helmet, and the helmet is fixed to the detection component 2 by the damping hinge. When the device needs to be connected to other objects to be tested, the corresponding limit component can be set according to the structure and shape of the object to be tested.

[0046] In order to facilitate the use of the device for detection by hanging it on the wall, the mounting frame 1 provided in the embodiment of the present application can be set to a wedge-shaped structure. After the mounting frame 1 is connected to the vertical wall, the hanging surface where the detection component 2 is connected to the object to be detected is in an inclined state. The hanging surface in an inclined state can facilitate the user to connect the object to be detected such as a helmet to the detection component 2.

[0047] In order to display the detection results in real time, the embodiment of the present application may further provide a display unit 7, which is communicably connected to the data acquisition mainboard 21, and the display unit 7 may display the detection results corresponding to each of the detection units 25. Furthermore, a connector is provided on the mounting frame 1, and the connector is used to realize the communicative connection between the data acquisition mainboard 21 and the display unit 7 and the power supply.

[0048] The following takes the inner cavity contamination detection of a safety helmet as an example to introduce the device provided in the present application in detail.

[0049] The device may include a detection component 2, a display unit 7, a jacket pressing frame 4, a mounting frame 1, a limit component, and a dustproof jacket 5. The device is composed of Figure 1 and Figure 2 As shown, a circle of magnetic patches is pasted on one side of the sheath pressing frame 4, and the dustproof sheath 5 (transparent film) is pressed tightly against the surface of the detection component 2 through the magnetic attraction with the mounting frame 1, so as to protect the detection component 2 from pollution, and the dustproof sheath 5 is easy to replace.

[0050] When in use, put the helmet on the detection component 2, turn over the limit component 6, press the brim of the helmet, and fix the helmet on the detection component 2 by the damping hinge, and then start measuring the pollution inside the helmet. When not wall-mounted, the limit component is not needed.

[0051] The display unit 7 is an external device of the detection component 2, which can display the detection data and perform operations such as modifying and initializing the detection device system parameters. The mounting frame 1 is provided with a connector, which can realize external power supply and communicate with the display unit 7. The wedge-shaped structure of the mounting frame 1 makes the helmet hanging surface at a certain angle to the vertical wall, which conforms to the ergonomic design.

[0052] The device uses an end-window GM tube to detect β contamination on the inner surface. The shape of the outer shell of the detection component 2 is designed according to the inner cavity space of the safety helmet. The end-window GM tube is compactly arranged on the top and circumference of the detector component outer shell to ensure that the gap between the detection surface and the detected surface of the end-window GM tube is uniform, so as to fully detect the inside of the safety helmet.

[0053] Detection component 2 Figure 3 and Figure 4 The detection assembly 2 includes a data acquisition mainboard 21, a plurality of data acquisition boards 22, a probe housing 23, a probe back plate 24, a steel mesh 28, board mounting studs 29, a wire shielding plate 26, a photoelectric sensor 27, and a plurality of detection units 25, each of which includes an end window type GM tube.

[0054] The end window type GM tube of each detection unit 25 is individually encapsulated by a steel mesh 28 for easy maintenance and replacement. The photoelectric sensor 27 automatically senses the helmet and triggers the detector to detect radioactive contamination on the inner surface of the helmet. The data acquisition board 22 is used to convert the rays collected by the end window type GM tube contained in each detection unit 25 into electrical signals. Multiple detection units 25 are counted by a single data acquisition board 22, and the data acquisition main card further processes the electrical signals and displays them visually.

[0055] like Figure 5 , Figure 6 As shown, the calibration source unit 3 includes a source frame body 31, an iron core screw 32, a circular magnetic sheet 33, a double-sided adhesive tape 34, and a radioactive source 35. The outer diameter of the calibration source frame is equivalent to that of the end window type GM tube. The radioactive source 35 is attached to the source frame body 31 by means of the double-sided adhesive tape 34. The calibration source frame is adsorbed on the surface of the steel mesh 28 by the magnetic force of the circular magnetic sheet 33 and the steel mesh 28 (the iron core screw 32 is a carbon steel screw, which not only plays the role of installing the magnetic sheet, but also can enhance the magnetism of the magnet), so that the calibration work of each channel can be easily realized.

[0056] The display unit 7 uses a high-definition LCD screen and is equipped with a touch screen, which can visualize the working status of the equipment. The detection results of each end window type GM tube will also be fed back to the display interface, indirectly exposing the pollution location. The electrical control block diagram of the pollution monitoring equipment inside the helmet is as follows Figure 7 shown.

[0057] The contamination monitoring device inside the helmet has two working modes:

[0058] 1. After the detection component 2 is connected to an external power supply, it can independently measure the safety helmet to be inspected and broadcast the measurement results through voice.

[0059] 2. The detection component 2 is connected to the display unit 7 for use. The working data of the safety helmet can be read through the display unit 7, and the system parameters of the equipment and the system upgrade can be adjusted according to user needs.

[0060] In summary, the device for detecting radioactive contamination on the inner surface of an object provided by the present application has a detection component whose outer shape is designed according to the shape of the inner cavity, and a uniform gap between the detection surface and the detected surface, so that a comprehensive detection can be performed on the inside of the object to be detected. The device adopts a modular design and is easy to maintain. The detection component can be used alone as a detection device, or it can be used in conjunction with a display unit to improve the human-computer interaction performance. It can realize rapid detection of contamination in the inner cavity of the object to be detected. At the same time, the device has a simple principle, is easy to operate, has high detection efficiency, and can locate the contamination position. It is worthy of large-scale promotion and use.

[0061] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0062] It can be known from the description of the above implementation methods that those skilled in the art can clearly understand that the present application can be implemented by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product can be stored in a storage medium such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in the various embodiments of the present application or certain parts of the embodiments.

[0063] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can refer to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system or system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiment. The system and system embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without creative work.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A device for detecting radioactive contamination on the inner surface of an object, characterized in that: include: A mounting frame, the mounting frame is used to carry various components; A detection component, the detection component includes a data acquisition mainboard, a plurality of data acquisition boards, a probe housing, a probe back plate and a plurality of detection units, each of the detection units includes an end window type GM tube; the probe housing is connected to the mounting frame; the data acquisition mainboard and the plurality of data acquisition boards are connected to the rear end of the detection unit through the probe back plate; the plurality of data acquisition boards are used to convert the rays collected by the plurality of detection units into electrical signals one by one, and the data acquisition mainboard is used to process the electrical signals corresponding to the respective detection units so as to obtain the detection results corresponding to the respective detection units; Among them, the external contour structure of the probe housing is adapted to the contour shape of the inner surface of the object to be measured; and a plurality of the detection units are arranged on the top and circumference of the probe housing so that the gap between the detection surface formed by the plurality of the detection units and the measured surface formed by the inner surface of the object to be measured is uniform.

2. The device for detecting radioactive contamination on the inner surface of an object according to claim 1, characterized in that: The detection assembly also includes a wire shielding plate and a photoelectric sensor connected to the probe housing. The photoelectric sensor is used to detect whether the object to be detected is in place. After the photoelectric sensor detects that the object to be detected is in place, it triggers several detection units to perform detection.

3. The device for detecting radioactive contamination on the inner surface of an object according to claim 1, characterized in that: The end window type GM tube included in each detection unit is packaged by a steel mesh.

4. The device for detecting radioactive contamination on the inner surface of an object according to claim 3, characterized in that: It also includes a calibration source unit, which includes a source frame body, an iron core screw, a circular magnetic sheet, a double-sided tape and a radiation source; the radiation source is attached to the source frame body by the double-sided tape, and the circular magnetic sheet is connected to the source frame body by the iron core screw; the circular magnetic sheet is used to adsorb with the steel mesh to realize the calibration of each channel.

5. The device for detecting radioactive contamination on the inner surface of an object according to claim 1, characterized in that: The data acquisition main board and the data acquisition board are both connected to the probe back plate via board installation studs.

6. The device for detecting radioactive contamination on the inner surface of an object according to claim 1, characterized in that: It also includes a sheath pressing frame and a dustproof sheath. The sheath pressing frame is connected to the mounting frame in a magnetic way so as to press the dustproof sheath onto the surface of the detection component.

7. The device for detecting radioactive contamination on the inner surface of an object according to claim 1, characterized in that: It also includes a flip limit assembly, which is hinged to the mounting frame through a damping hinge; the object to be detected includes a safety helmet, and the flip limit assembly is used to press the brim of the safety helmet, and the safety helmet is fixed to the detection assembly by relying on the damping hinge.

8. The device for detecting radioactive contamination on the inner surface of an object according to claim 1, characterized in that: The mounting frame has a wedge structure. After the mounting frame is connected to the vertical wall, the hanging surface of the detection assembly connected to the object to be detected is in an inclined state.

9. The device for detecting radioactive contamination on the inner surface of an object according to claim 1, characterized in that: It also includes a display unit, which is communicably connected to the data acquisition mainboard. The display unit can display the detection results corresponding to each of the detection units. A connector is provided on the mounting frame, and the connector is used to realize the communicative connection between the data acquisition mainboard and the display unit and the connection with the power supply.

10. The device for detecting radioactive contamination on the inner surface of an object according to claim 9, characterized in that: The mounting frame is provided with a speaker and an alarm light. When the display unit is not in use or configured, the speaker is used to provide operation reminders to the user, and the speaker and the alarm light can provide sound and light alarm reminders.

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