Remote control scale device of radioactive density instrument and scale calibration method

Abstract

The invention provides a radioactive density instrument remote control scale device which comprises a driving mechanism which comprises a first workbench, a first sliding rail arranged on the first workbench, a mechanical arm arranged on the first sliding rail and an adjusting mechanism arranged opposite to the driving mechanism. The second slide rail is arranged on the second working table, the support frame is arranged on the second slide rail and is used for placing a radioactive density instrument, the placing table and the second working table are arranged at an interval, and a sample to be detected is arranged on the placing table. Scale calibration work can be completed by remotely controlling the radioactive density instrument, so that manual loading and unloading of a radioactive density source are replaced, the possibility that operators are radiated is reduced, and the purpose of protecting personal safety is achieved.

Description

Technical Field

[0001] The invention relates to the field of mine geophysics, and in particular to a remote control calibration device for a radioactive density instrument, and a calibration method. Background Art

[0002] Radioactive sources are usually colorless, odorless and invisible, but the danger they cause is greater than that of "nuclear killers". At present, radioactive sources have entered our daily lives, and a census found that their number has exceeded more than 100,000, posing a serious threat to human safety and the environment.

[0003] At present, Class I radioactive sources, such as the cesium-137 gamma source, are commonly used in the process of logging in oil field exploration and development. The half-life of the cesium-137 source is 30 years, and it kills human cells by emitting gamma rays, while density logging instruments use the cesium-137 gamma source when logging and calibrating.

[0004] According to the survey, when calibrating in the radioactive workshop, the radioactive source is usually loaded and unloaded manually. The density instrument workshop calibration is usually once every two months, and the density instrument needs to be calibrated in the workshop when overhauling the density instrument, replacing the instrument probe and sandblasting the instrument.

[0005] Usually, when calibrating in a density workshop, it is necessary to install a cesium-137 gamma source on the instrument, calibrate in a magnesium cylinder and an aluminum cylinder respectively, and insert and adjust the position of the instrument probe and the pressure of the instrument in the calibration cylinder. In the prior art, all of the above processes need to be implemented manually. However, due to the long calibration time in the workshop, the operators will be exposed to radiation for a long time, which can easily cause irreversible damage to the operators.

[0006] Therefore, it is desired in the art to provide a remote control calibration device for a radioactive density instrument to solve the above technical problems. Summary of the invention

[0007] The purpose of the present invention is to provide a remote control calibrating device for a radioactive density instrument, which can complete the calibration work by remotely controlling the radioactive density instrument, thereby replacing the manual loading and unloading of radioactive density sources, thereby reducing the possibility of radiation exposure to operators, so as to achieve the purpose of protecting personal safety.

[0008] According to a first aspect of the present invention, there is provided a remote control calibration device for a radioactive density instrument, comprising a driving mechanism, which comprises a first workbench, a first slide rail arranged on the first workbench, and a mechanical arm arranged on the first slide rail.

[0009] an adjusting mechanism arranged opposite to the driving mechanism, comprising a second workbench, a second slide rail arranged on the second workbench, and a supporting frame arranged on the second slide rail and used for placing a radioactive density instrument, and

[0010] A placement table is arranged at a distance from the second workbench, and a sample to be detected is arranged on the placement table.

[0011] In one embodiment, the driving mechanism further comprises a source tank disposed on the first workbench and spaced apart from the first slide rail, and a density source disposed in the source tank.

[0012] A source chamber extending radially inwardly and used for accommodating the density source is formed on the outer wall of the radioactive density instrument.

[0013] In one embodiment, a probe assembly is provided on a side of the radioactivity density instrument close to the placement table, and the source chamber is radially arranged in the probe assembly.

[0014] The driving mechanism also includes a positioning component that is arranged on the mechanical arm and connected to the probe assembly, and the positioning component includes a laser locator and a camera.

[0015] In one embodiment, the radioactive density instrument remote control calibration device further comprises a clamp for being arranged at the free end of the mechanical arm, and a source loading rod for being arranged at the free end of the mechanical arm.

[0016] The robot arm is configured to open the lock provided on the source tank through the adjusting gripper of the clamp, load the density source into the source bin through the source loading rod, and fasten the density source through screws.

[0017] In one embodiment, the source loading rod comprises a screw portion for forming a threaded connection with the density source, and an engagement portion configured in an outer hexagonal shape for engaging with the screw.

[0018] In one embodiment, the adjustment mechanism further includes a lifter disposed below the second workbench and a third slide rail disposed at the upper end surface of the support frame.

[0019] The radioactive density instrument is fixed to the third slide rail by a locking ring, and the support structure is configured to enable the radioactive density instrument to move laterally into the sample to be tested through the third slide rail, and under the action of the lifter, the outer wall surface of the radioactive density instrument and the inner wall surface of the sample to be tested form a sealed connection.

[0020] In one embodiment, the sample to be tested includes a magnesium block and an aluminum block arranged at intervals, and a steel sheet arranged on the magnesium block and a magnesium sheet arranged on the aluminum block, wherein through holes are formed on both the magnesium block and the aluminum block to allow the radioactive density instrument to pass through.

[0021] In one embodiment, the radioactive density instrument remote control calibration device further comprises a controller respectively connected to the mechanical arm, the support frame and the lifter.

[0022] According to a second aspect of the present invention, there is provided a method for calibrating a scale using the remote control calibrating device of the radioactive density instrument as described above, comprising the following steps:

[0023] S1, controlling the mechanical arm to fix the clamp through the controller, so as to prompt the clamp to open the lock on the source tank by adjusting the gripper; the mechanical arm removes the clamp and fixes the source loading rod,

[0024] S2, loading the density source into the source compartment of the radioactive density instrument through the screw portion of the source loading rod; tightening the screw through the joint portion of the source loading rod to limit the density source,

[0025] S3. The controller causes the support frame to move horizontally or vertically and then enter into the sample to be tested to record the calibration data of the radioactive density instrument.

[0026] In one embodiment, the step S301 of calibration is also included:

[0027] First, the radioactive density instrument records data once when it enters the through hole of the magnesium block under the action of the support frame, and records data again after the controller controls the mechanical arm to remove the steel sheet;

[0028] Then, the radioactive density instrument records data once when it enters the through hole of the aluminum block under the action of the support frame, and records data again after the controller controls the mechanical arm to remove the magnesium sheet.

[0029] Compared with the prior art, the advantages of the present invention are:

[0030] First, the present invention is an intelligent device with a remote control function. Therefore, when the radioactive density instrument is calibrated, the present invention can replace the manual loading and unloading of the radioactive density source, thereby reducing the possibility of radiation exposure to the operators, so as to achieve the purpose of protecting personal safety.

[0031] Secondly, the operator can remotely control the device from a distance of 100 meters. Therefore, on the one hand, the operator can control the position and movement of the robot arm through the controller, so as to accurately load the density source in the source tank into the source bin of the radioactive density instrument. On the other hand, the operator can control the support frame and the lifter through the controller to indirectly control the position of the radioactive density instrument and the sample to be tested, so as to achieve the calibration work.

[0032] All of the above work can be remotely controlled, thereby reducing the radiation of employees from radioactive density sources and further ensuring the health of operators.

[0033] Thirdly, the present invention ensures that the cesium-137 gamma source can be in a controllable state through the cooperation of the camera and the radioactivity monitor, and enables the robot arm to accurately determine the position of the source bin and the screw hole through the cooperation of the laser locator and the camera, thereby improving the success rate and accuracy of the remote installation of the density source. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention will be described in detail below in conjunction with the accompanying drawings, in which:

[0035] Figure 1 The structure of the remote control calibration device of the radioactive density instrument according to the present invention is schematically shown;

[0036] Figure 2 It is a structural schematic diagram of a density instrument in a remote control calibration device for a radioactive density instrument according to the present invention;

[0037] Figure 3 for Figure 2 A partial schematic diagram of

[0038] Figure 4 A three-dimensional diagram of a source tank in a remote control calibration device of a radioactive density instrument according to the present invention;

[0039] Figure 5 It is a schematic diagram of the structure of the density source in the remote control calibration device of the radioactive density instrument according to the present invention;

[0040] Figure 6 A three-dimensional diagram of a holder in a remote control calibrating device of a radioactive density instrument according to the present invention;

[0041] Figure 7 It is a schematic diagram of the structure of the source rod in the remote control calibration device of the radioactive density instrument according to the present invention.

[0042] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0043] In order to make the technical solutions and advantages of the present invention more clearly understood, the exemplary embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than an exhaustive list of all the embodiments. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0044] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0045] In the present invention, unless otherwise clearly stipulated and limited, terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements.

[0046] For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] The present invention will be further described below in conjunction with the accompanying drawings.

[0048] Figure 1 The structure of the remote control calibration device of the radioactive density instrument according to the present invention is schematically shown;

[0049] Figure 2 It is a structural schematic diagram of a density instrument in a radioactive density instrument remote control calibration device 100 according to the present invention;

[0050] Figure 3 for Figure 2 A partial schematic diagram of

[0051] Figure 4 A perspective view of a source tank 14 in a remote control calibration device 100 for a radioactive density instrument according to the present invention;

[0052] Figure 5 It is a structural schematic diagram of the density source 15 in the remote control calibration device 100 of the radioactive density instrument according to the present invention;

[0053] Figure 6 A perspective view of a holder 40 in a remote control calibrating device 100 for a radioactive density instrument according to the present invention;

[0054] Figure 7 Schematic diagram of the structure of the source rod 50 in the remote control calibration device 100 of the radioactive density instrument according to the present invention.

[0055] like Figure 1 As shown, according to a first aspect of the present invention, a radioactive density instrument remote control calibration device 100 is provided, which includes a driving mechanism. The driving mechanism includes a first workbench 11, a first slide rail 12 and a mechanical arm 13.

[0056] Preferably, the first workbench 11 is configured in a plate-like form, and the first slide rail 12 is disposed on the first workbench 11. Preferably, the first slide rail 12 is arranged laterally on the first workbench 11. The robot arm 13 is disposed on the first slide rail 12, and can form a sliding connection with the first workbench 11 through the first slide rail 12, thereby enabling the robot arm 13 to move laterally under the action of the first slide rail 12.

[0057] In a preferred embodiment, a torque sensor (not shown) is provided on the robot arm 13 to limit the maximum torque of the robot arm 13 to within 50 pounds.

[0058] According to the present invention, the radioactive density instrument remote control calibration device 100 further includes an adjustment mechanism. Figure 1 As shown, the adjustment mechanism includes a second workbench 21 , a second slide rail 22 and a support frame 23 .

[0059] Preferably, the second workbench 21 is configured in a plate-like form and is arranged opposite to the first workbench 11, and the second slide rail 22 is arranged on the second workbench 21. Preferably, there are two second slide rails 22, which are respectively arranged longitudinally on both sides of the upper end surface of the second workbench 21. The support frame 23 is arranged on the two second slide rails 22 in the transverse direction, and can form a sliding connection with the second workbench 21 through the second slide rails 22, thereby enabling the support frame 23 to move longitudinally under the action of the second slide rails 22.

[0060] In one embodiment, Figure 1 As shown, a radioactive density instrument 60 is also installed on the support frame 23 to ensure that the subsequent calibration process can proceed smoothly.

[0061] In one embodiment, Figure 1 As shown, the radioactive density instrument remote control calibration device 100 further includes a placement table 30 spaced apart from the second workbench 21. Preferably, a sample to be detected is placed on the placement table 30.

[0062] In one embodiment, Figure 1As shown, the driving mechanism further includes a source tank 14 and a density source 15. The source tank 14 is arranged on the first workbench 11 and is spaced apart from the first slide rail 12. Preferably, the source tank 14 can be temporarily and firmly mounted on the first workbench 11 through a through slot 111 (described below). Accordingly, the density source 15 is mounted in the source tank 14 for extraction by the robot arm 13.

[0063] Preferably, if Figure 1 As shown, a radially inward through groove 111 is formed at the joint between the first workbench 11 and the source tank 14. Thus, the source tank 14 can be fixedly mounted on the first workbench 11 through the through groove 111.

[0064] In this way, on the one hand, the source tank 14 can be firmly installed on the first workbench 11 under the action of the through groove 111, thereby ensuring the stability of the source tank 14 in subsequent work to prevent the source tank 14 from moving; on the other hand, because the source tank 14 has a fixed position under the action of the through groove 111, it is helpful for the subsequent robotic arm 13 to align with the source tank 14 to achieve the purpose of smoothly extracting the density source 15.

[0065] It is easy to understand that the density source 15 in the present invention is, for example, a cesium-137 gamma source (radioactive source).

[0066] In one embodiment, Figure 2 and 3 As shown, a source chamber 16 extending radially inward is formed on the outer wall of the radioactive density instrument 60. Preferably, the source chamber 16 can accommodate the density source 15. It is easy to understand that after the density source 15 is installed in the radioactive density instrument 60 through the source chamber 16, the calibration process can be smoothly performed.

[0067] According to the present invention, Figure 1 and 6 As shown, the radioactive density instrument remote control calibration device 100 further includes a holder 40. Preferably, the holder 40 is configured to be mounted at the free end of the mechanical arm 13.

[0068] Easy to understand, such as Figure 4 As shown, after the clamp 40 is installed at the free end of the robot arm 13 , the robot arm 13 can open the lock 141 set on the source tank 14 through the adjustment gripper 41 of the clamp 40 .

[0069] In a specific embodiment, the clamp 40 includes a connecting slot 42 for connecting to the free end of the robot arm 13, and an adjusting gripper 41 arranged on a side away from the connecting slot 42, wherein two adjusting grippers 41 are provided and the two adjusting grippers 41 are arranged at intervals.

[0070] In a preferred embodiment, the robot arm 13 can not only selectively connect or remove the clamp 40 through the connecting slot 42, but also after the clamp 40 is connected through the connecting slot 42, it can change the distance between the two adjustment grippers 41 to achieve the purpose of opening the lock 141 set on the source tank 14.

[0071] According to the present invention, Figure 1 and 7 As shown, the radioactive density instrument remote control calibration device 100 further includes a source loading rod 50. Preferably, the source loading rod 50 is configured to be mounted at the free end of the mechanical arm 13.

[0072] It is easy to understand that after the source loading rod 50 is installed at the free end of the robotic arm 13, the robotic arm 13 can first take out the density source 15 from the source tank 14 through the source loading rod 50, and then after loading the density source 15 into the source compartment 16, tighten the screws to fasten the density source 15 to the radioactive density instrument 60.

[0073] In a specific embodiment, Figure 7 As shown, the source loading rod 50 includes a screw portion 51 for forming a threaded connection with the density source 15, and a coupling portion 52 configured in an outer hexagonal shape for coupling with the screw.

[0074] The following specifically describes the process of taking the density source 15 out of the source tank 14 and fixing it into the source bin 16:

[0075] Stage 1: First, the free end of the robotic arm 13 fixes the joint 52 of the source rod 50; then, the screw portion 51 of the source rod 50 is connected to the density source 15 in the source tank 14 under the action of the robotic arm 13; finally, the position of the robotic arm 13 is adjusted through the positioning assembly (introduced below) to align with the source compartment 16 of the radioactive density instrument 60, and the density source 15 is accurately placed into the source compartment 16 under the action of the robotic arm 13.

[0076] The second stage: First, the position of the source rod 50 is turned so that the free end of the robot arm 13 fixes the screw portion 51 of the source rod 50; then, the position of the robot arm 13 is adjusted by the positioning assembly (described below) to align the screw on the joint portion 52 of the source rod 50. Figure 5 The screw hole 151 on the density source 15 is shown; finally, the density source 15 is fastened in the radioactive density instrument 60 by rotating the source rod 50 and tightening the screw.

[0077] In one embodiment, Figure 1 and 3As shown, a probe assembly 61 is provided on one side of the radioactive density instrument 60 close to the placement table 30. Preferably, the source chamber 16 is radially arranged in the probe assembly 61. In addition, the driving mechanism further includes a positioning assembly arranged on the mechanical arm 13 and connected to the probe assembly 61.

[0078] Preferably, the positioning assembly includes a laser positioner 131 and a camera 132. The camera 132 is preferably a high-definition camera, and can monitor the operating status of the equipment in real time, and cooperate with a radioactivity monitor (not shown) to ensure that the cesium-137 gamma source can be in a controllable state. The laser positioner 131 cooperates with the camera 132 to enable the robot arm 13 to accurately determine the position of the source bin 16 and the screw hole 151, thereby improving the success rate and accuracy of the remote installation of the density source 15.

[0079] According to the present invention, Figure 1 As shown, the adjustment mechanism further includes a lifter 17 and a third slide rail 18 .

[0080] Preferably, the lifter 17 is disposed below the second workbench 21; the third slide rail 18 is disposed at the upper end surface of the support frame 23, specifically, the third slide rail 18 is arranged transversely on the support frame 23. Accordingly, the radioactive density instrument 60 can be mounted on the third slide rail 18, so that a sliding connection can be formed with the support frame 23 through the third slide rail 18.

[0081] In addition, combined with the above content, it can be known that the radioactive density instrument 60 can not only move longitudinally under the action of the second slide rail 22, but also move laterally under the action of the third slide rail 18, thereby improving the flexibility of the radioactive density instrument 60.

[0082] In one embodiment, Figure 1 As shown, the radioactive density instrument 60 is fixed on the third slide rail 18 by a locking ring 19. Preferably, the locking ring 19 is partially sleeved outside the radioactive density instrument 60 to control the rotation angle of the radioactive density instrument 60, thereby preventing the instrument from rotating.

[0083] Preferably, the locking ring 19 is made of polytetrafluoroethylene. The locking force of the locking ring 19 is controllable, usually around 200 pounds.

[0084] After the radioactive density instrument 60 is fixed on the third slide rail 18 by the locking ring 19, the support frame 23 can enable the radioactive density instrument 60 to move laterally into the sample to be tested through the third slide rail 18; and under the action of the lifter 17, the outer wall surface of the radioactive density instrument 60 can form a sealed connection with the inner wall surface of the sample to be tested, thereby effectively improving the accuracy of the test data.

[0085] It is easy to understand that when the present invention is calibrating, the radioactive density instrument 60 needs to be in close contact with the sample to be tested in order to obtain accurate calibration data. The height of the radioactive density instrument 60 can be changed by the lifter 17, thereby changing the pressure applied to the probe assembly 61 to achieve a better simulation of the stress of the instrument in the well, further ensuring the accuracy of the calibration.

[0086] Preferably, the pressure applied by the lifter 17 when the outer wall surface of the radioactivity density instrument 60 is in close contact with the inner wall surface of the sample to be tested is no greater than 500 pounds.

[0087] In one embodiment, Figure 1 As shown, the sample to be tested includes a magnesium block 31 and an aluminum block 32 arranged at intervals on the first workbench 11 , and a steel sheet 311 disposed on the magnesium block 31 and a magnesium sheet 321 disposed on the aluminum block 32 .

[0088] It is easy to understand that the magnesium block 31 and the steel sheet 311 are a group; the aluminum block 32 and the magnesium sheet 321 are a group.

[0089] Preferably, if Figure 1 As shown, a through hole 33 is formed on each of the magnesium block 31 and the aluminum block 32, and the through hole 33 can allow the radioactive density instrument 60 to pass through. Under the action of the lifter 17, the radioactive density instrument 60 can more easily form a close contact with the inner wall of the magnesium block 31 or the aluminum block 32, thereby improving the accuracy of obtaining the scale data.

[0090] In a specific embodiment, the present invention determines the density value through the magnesium block 31 and the aluminum block 32, calibrates the engineering value of the radioactive density instrument 60, and completes the calibration process of the radioactive density instrument 60 in an automated manner to reduce the harm of radioactive substances to personnel. In addition, the magnesium block 31, the aluminum block 32, the steel sheet 311 and the magnesium sheet 321 are standard devices for calibrating the radioactive density instrument 60, so the engineering value of the radioactive density instrument 60 can be calculated by calibrating them.

[0091] In a preferred embodiment, the radioactive density instrument remote control calibration device 100 further includes a controller (not shown) connected to the mechanical arm 13, the support frame 23 and the lifter 17 respectively.

[0092] According to a second aspect of the present invention, there is provided a method for calibrating a scale using the radioactive density instrument remote control calibrator 100 as described above, comprising the following steps:

[0093] First, the controller controls the robot arm 13 to fix the clamp 40, so as to enable the clamp 40 to open the lock 141 on the source tank 14 by adjusting the gripper 41;

[0094] Then, the robot arm 13 removes the clamp 40 and fixes the joint 52 of the source rod 50;

[0095] Afterwards, the density source 15 is fixed by the screw portion 51 of the source rod 50, so that the density source 15 is taken out from the source tank 14 and installed in the source compartment 16 of the radioactive density instrument 60;

[0096] Afterwards, the source rod 50 is turned so that the mechanical arm 13 fixes the screw portion 51 of the source rod 50;

[0097] Afterwards, the screws are tightened through the joint 52 of the source rod 50 to fix the density source 15 in the source chamber 16 .

[0098] Finally, the controller causes the support frame 23 to move horizontally or vertically and then enter the sample to be tested to record the calibration data of the radioactive density instrument 60 (described in detail below).

[0099] It is easy to understand that before performing the above steps, the remote control software needs to be implanted in the controller, the radioactive density instrument 60 needs to be fixed on the third slide rail 18 through the locking ring 19 with the probe assembly 61 facing upward, the source tank 14 needs to be installed on the first workbench 11 through the through groove 111, and the radioactive density instrument 60 needs to be connected to the bridle (not shown) and powered.

[0100] In one embodiment, the step S301 of calibration is also included:

[0101] First, under the action of the third slide rail 18, the radioactive density instrument 60 enters the through hole 33 of the magnesium block 31 in the horizontal direction, and when the radioactive density instrument 60 is in close contact with the inner wall of the through hole 33 under the action of the lifter 17, the first calibration data is recorded.

[0102] Then, the above position is kept unchanged, and the controller controls the mechanical arm 13 to remove the steel sheet 311 and record the scale data again.

[0103] Afterwards, the radioactive density instrument 60 is reset under the action of the lifter 17 and the third slide rail 18 .

[0104] Afterwards, under the joint action of the second slide rail 22 and the third slide rail 18, the radioactive density instrument 60 first moves longitudinally and then transversely into the through hole 33 of the aluminum block 32, and when the radioactive density instrument 60 is in close contact with the inner wall of the through hole 33 under the action of the lifter 17, the first calibration data is recorded.

[0105] Finally, the above position is kept unchanged, and the controller controls the mechanical arm 13 to remove the magnesium sheet 321 and record the scale data again.

[0106] It is easy to understand that the calibration site environment meets the radiation protection standards, the site is shielded by high-density materials, and the shielding room or shielding wall built with high-density materials protects the operators. Operators are required to wear labor protection equipment that meets the requirements for radioactive personnel to dismantle sources.

[0107] Compared with the prior art, the present invention has the following advantages:

[0108] First, the present invention is an intelligent device with a remote control function. Therefore, when the radioactive density instrument 60 is calibrated, the present invention can replace the manual loading and unloading of the radioactive density source 15, thereby reducing the possibility of radiation exposure to the operators, so as to achieve the purpose of protecting personal safety.

[0109] Second, the operator can remotely control the device from a distance of 100 meters. Therefore, on the one hand, the operator can control the position and movement of the mechanical arm 13 through the controller, so as to accurately load the density source 15 in the source tank 14 into the source chamber 16 of the radioactive density instrument 60. On the other hand, the operator can control the support frame 23 and the lifter 17 through the controller to indirectly control the position of the radioactive density instrument 60 and the sample to be tested, so as to achieve the calibration work.

[0110] The above work can all be remotely controlled, thereby reducing the radiation of the radioactive density source 15 to the employees, and further ensuring the health of the operators.

[0111] Third, the present invention ensures that the cesium-137 gamma source can be in a controllable state through the cooperation of the camera 132 and the radioactivity monitor, and enables the robot arm 13 to accurately determine the position of the source bin 16 and the screw hole 151 through the cooperation of the laser locator 131 and the camera 132, thereby improving the success rate and accuracy of the remote installation of the density source 15.

[0112] The above are only preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art can easily make changes or modifications within the disclosure scope of the present invention, and such changes or modifications should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A remote control calibration device for a radioactive density instrument, comprising: A driving mechanism, comprising a first workbench (11), a first slide rail (12) arranged on the first workbench (11), and a mechanical arm (13) arranged on the first slide rail (12), an adjusting mechanism arranged opposite to the driving mechanism, comprising a second workbench (21), a second slide rail (22) arranged on the second workbench (21), and a support frame (23) arranged on the second slide rail (22) and used for placing a radioactive density instrument (60); and A placement table (30) is arranged at a distance from the second workbench (21), and a sample to be tested is arranged on the placement table (30).

2. The radioactive density instrument remote control calibration device according to claim 1, characterized in that: The driving mechanism further comprises a source tank (14) arranged on the first workbench (11) and spaced apart from the first slide rail (12), and a density source (15) arranged in the source tank (14). A source chamber (16) extending radially inward and used to accommodate the density source (15) is formed on the outer wall of the radioactive density instrument (60).

3. The radioactive density instrument remote control calibration device according to claim 2, characterized in that: A probe assembly (61) is provided on one side of the radioactivity density instrument (60) close to the placement table (30), and the source chamber (16) is radially arranged in the probe assembly (61). The driving mechanism further comprises a positioning component arranged on the mechanical arm (13) and connected to the probe assembly (61), wherein the positioning component comprises a laser positioner (131) and a camera (132).

4. The radioactive density instrument remote control calibration device according to claim 2, characterized in that: The radioactive density instrument remote control calibrating device further comprises a clamp (40) for being arranged at the free end of the mechanical arm (13), and a source loading rod (50) for being arranged at the free end of the mechanical arm (13). The robot arm (13) is configured to open a lock (141) provided on the source tank (14) through an adjustment gripper (41) of the clamp (40), and to load the density source (15) into the source bin (16) through the source loading rod (50) and to fasten the density source (15) through screws.

5. The radioactive density instrument remote control calibration device according to claim 4, characterized in that: The source loading rod (50) comprises a screw portion (51) for forming a threaded connection with the density source (15), and a joint portion (52) configured in an outer hexagonal shape for forming a joint with the screw.

6. The radioactive density instrument remote control calibration device according to claim 5, characterized in that: The adjustment mechanism further comprises a lifter (17) arranged below the second workbench (21), and a third slide rail (18) arranged at the upper end surface of the support frame (23). The radioactive density instrument (60) is fixed to the third slide rail (18) by a locking ring (19), and the support frame (23) is configured to enable the radioactive density instrument (60) to move laterally into the sample to be tested through the third slide rail (18), and to form a sealed connection between the outer wall surface of the radioactive density instrument (60) and the inner wall surface of the sample to be tested under the action of the lifter (17).

7. The radioactive density instrument remote control calibration device according to claim 6, characterized in that: The sample to be tested comprises a magnesium block (31) and an aluminum block (32) arranged at intervals, and a steel sheet (311) arranged on the magnesium block (31) and a magnesium sheet (321) arranged on the aluminum block (32), wherein a through hole (33) is formed on each of the magnesium block (31) and the aluminum block (32) to allow the radioactive density instrument (60) to pass through.

8. The radioactive density instrument remote control calibration device according to claim 7, characterized in that: The radioactive density instrument remote control calibrating device further comprises a controller connected to the mechanical arm (13), the support frame (23) and the lifter (17) respectively.

9. A method for calibrating a radioactive density instrument using a remote control calibrator according to any one of claims 1 to 8, comprising the following steps: S1, controlling the mechanical arm (13) to fix the clamp (40) through the controller, so as to prompt the clamp (40) to open the lock (141) on the source tank (14) by adjusting the gripper (41); the mechanical arm (13) removes the clamp (40) and fixes the source loading rod (50), S2, loading the density source (15) into the source compartment (16) of the radioactive density instrument (60) through the screw portion (51) of the source loading rod (50); tightening the screw through the joint portion (52) of the source loading rod (50) to limit the position of the density source (15), S3, the controller causes the support frame (23) to move in the horizontal or vertical direction and then enter the sample to be tested to record the calibration data of the radioactive density instrument (60).

10. The method for calibrating the radioactive density instrument by remotely controlling the calibrating device according to claim 9, characterized in that: The step S301 of calibration is also included: First, the radioactive density instrument (60) records data once when it enters the through hole (33) of the magnesium block (31) under the action of the support frame (23), and records data again after the controller controls the mechanical arm (13) to remove the steel sheet (311); Then, the radioactive density instrument (60) records data once when it enters the through hole (33) of the aluminum block (32) under the action of the support frame (23), and records data again after the controller controls the mechanical arm (13) to remove the magnesium sheet (321).

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