Magnetic latching penetration test device for radioactive substance transportation container

Abstract

The invention relates to a magnetic latching penetration test device for a radioactive substance transportation container. The magnetic latching penetration test device comprises a device body, a guide pipe, a magnetic latching electromagnet, a laser control module and a laser ranging probe. The device is a vertical box body, and the vertical guide pipe is used as a mechanical reference; the electromagnet is kept in a power-off state and released in a power-on state, so that the test bar is lifted, kept and controlled to be released; four sensors are arranged at four corners of the bottom for laser ranging, cooperative ranging is realized, and an impact point and a horizontal state are indicated by a cross line intersection point; the display module and the battery are cooperatively controlled to supply power. The device can be quickly leveled through the hoisting interface, and the gap between the guide pipe and the test bar is 0.25-0.75 mm, so that the device is suitable for multi-height penetration tests of 1.0 m, 1.7 m and the like, and has the advantages of being safe, accurate, universal and easy to deploy.

Description

Technical Field

[0001] This invention relates to the field of radioactive material transportation technology, and more particularly to a magnetically held penetration test device for radioactive material transportation containers. Background Technology

[0002] According to relevant national regulations and standards, some radioactive material transport containers must undergo a penetration test before being put into use. This test involves dropping a test rod, approximately 3.2 cm in diameter, hemispherical at one end, and weighing about 6 kg, from a specified height, so that it lands vertically at the center of the weakest point of the sample. This assesses the structural integrity and safety of the container under extreme mechanical impact. To achieve this goal, two methods are commonly used in current field operations.

[0003] Firstly, a test bar is suspended by a thin thread (steel wire rope, fiber rope, etc.) and lifted to a designated height by a crane or overhead crane. The height is then measured at close range using calipers, measuring tapes, or other measuring tools. During the test, the test bar is lowered by cutting the thread or releasing it as a whole using pulleys. This method requires high-strength, flexible, and abrasion-resistant wire. Friction / jamming from the cutting action or release mechanism can easily introduce lateral disturbances instantaneously, leading to deviations in the falling posture and instability in the incident direction. Furthermore, manual measurement and positioning near the target pose dual safety risks of radiation and mechanical issues, and the accuracy of height measurement relies heavily on operational experience and visual readings, resulting in poor repeatability.

[0004] Secondly, a conventional electromagnet (electric adsorption, demagnetization upon power failure) is used to adsorb the test rod. The rod is lifted using hoisting methods, and its height is measured at close range with measuring instruments. During the test, the electromagnet is demagnetized by power failure to release the test rod. This method is highly dependent on the stability of the on-site power supply. A momentary power outage or line fault could lead to accidental release, posing a significant safety hazard. Furthermore, personnel are still required to take close-range readings, resulting in the same radiation / mechanical risks and reading errors as in Method 1. In addition, the conventional electromagnet approach lacks active constraints and visual indications for the release posture and landing point of the test rod, making it susceptible to environmental wind, swaying, and hoisting swing, leading to increased incident deviation and test result dispersion.

[0005] In summary, existing penetration testing techniques generally suffer from the following problems: 1. The release process is prone to attitude disturbances, and the landing point deviation is difficult to quantify; 2. Height measurement requires close-range manual reading, resulting in insufficient safety and accuracy; 3. They are sensitive to power supply stability, posing a risk of accidental release during power outages; 4. There is a lack of rapid verification of the device's horizontal / alignment status and data redundancy validation, making it difficult to ensure the consistency and traceability of the test. These problems restrict the safe, efficient, and standardized implementation of penetration testing for radioactive material transport containers.

[0006] In view of the above problems, this invention is proposed. Summary of the Invention

[0007] This invention discloses a magnetically held penetration test device for radioactive material transport containers, aiming to solve the technical problems existing in the prior art.

[0008] To achieve the above objectives, according to the present invention, a magnetically held penetration test device for radioactive material transport containers is provided, comprising a device body, a guide tube, a laser control module, a magnetically held electromagnet, and a laser ranging probe. The main body of the device adopts a vertical box structure to house the laser control module, magnetic holding electromagnet and laser ranging probe; The guide tube is fixed to the lower frame of the device body and is detachably connected to the device body through a flange. Its axis is vertical and serves as the mechanical reference line of the device. The test rod is installed in the guide tube, and the inner diameter of the guide tube is slightly larger than the outer diameter of the test rod. The magnetic holding electromagnet is installed inside the device body and located above the guide tube. The magnetic attraction surface line of the magnetic holding electromagnet is coaxial or parallel to the axis of the guide tube. The laser control module is electrically connected to the laser ranging probe. The laser ranging probe is equipped with multiple laser sensors, which are respectively set around the magnetic holding electromagnet at the four corners of the bottom of the device body. The laser control module is set above the magnetic holding electromagnet and the laser ranging probe.

[0009] As a preferred technical solution, a control and display module is also included. The control and display module is located inside the device body and includes a main control unit, an input / output interface, a human-machine interface circuit, a power drive circuit, and a power management unit. The input terminal of the control and display module is connected to the laser control module.

[0010] As a preferred technical solution, the device body includes a front panel, and the front panel is provided with a display screen, a switch and a charging interface from top to bottom.

[0011] As a preferred technical solution, the device body is also equipped with a battery, which is connected to a switch and a charging interface respectively.

[0012] As a preferred technical solution, the device body is equipped with a bearing plate and several supporting ribs to fix the laser control module, magnetic holding electromagnet and laser ranging probe.

[0013] As a preferred technical solution, the number of multiple laser sensors is four. The intersection of the visible crosshairs of the four laser sensors is defined as the impact point. When the ranging values ​​of the four laser sensors are consistent or the difference between them is less than a preset threshold, the device is determined to be in a horizontal state and the average height is fed back. Otherwise, an audible / visual alarm is triggered and four height values ​​are fed back respectively.

[0014] As a preferred technical solution, the radial gap between the inner diameter of the guide tube and the outer diameter of the penetration test rod is 0.25-0.75 mm.

[0015] As a preferred technical solution, the rod used for the penetration test is a long rod.

[0016] As a preferred technical solution, the rod used for the penetration test is a metal rod.

[0017] As a preferred technical solution, the device body is provided with hoisting interfaces at the four corners of the top to adjust the device's posture.

[0018] The technical solution adopted in this invention can achieve at least one of the following beneficial effects: 1. This invention achieves "power-off holding and power-on release" through a magnetic holding electromagnet. It can reliably hold the penetrating test rod even in the event of abnormal power failure or interruption of external power supply, avoiding accidental release and significantly improving the inherent safety and reliability of the test process.

[0019] 2. The present invention sets four laser sensors at the four corners of the bottom of the device body and coordinates the distance measurement with the laser control module. Combined with the visual cross indicator and consistency threshold judgment, it realizes intuitive indication of landing point, rapid leveling and height data redundancy verification. Compared with single-point distance measurement, it significantly improves distance measurement accuracy, anti-interference ability and attitude control ability.

[0020] 3. This invention uses a vertical guide tube as a mechanical reference. The guide tube and the outer diameter of the test bar maintain a fitting gap of 0.25 to 0.75 mm. With the four corner hoisting interfaces and modular arrangement, the long rod-shaped metal test bar has a stable posture and consistent incident direction during lifting and release. The device is easy to quickly position on site and is applicable to tests at multiple heights (such as 1.0m, 1.7m, etc.), with better applicability and repeatability. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below, forming part of the present invention. The illustrative embodiments of the present invention and their descriptions explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings: Figure 1 This is a schematic diagram of the structure of a magnetically held penetration test device for a radioactive article transport container according to the present invention; Figure 2 This is a schematic diagram of the internal structure of a magnetically held penetration test device for a radioactive article transport container according to the present invention; Figure 3 This is a schematic diagram of the laser ranging probe and guide tube of the present invention.

[0022] Explanation of reference numerals in the attached figures: 1. Device body; 2. Guide tube; 3. Switch; 4. Charging interface; 5. Display screen; 6. Lifting interface; 7. Control display module; 8. Battery; 9. Laser control module; 10. Magnetic holding electromagnet; 11. Laser ranging probe; 111. First laser sensor; 112. Second laser sensor; 113. Third laser sensor; 114. Fourth laser sensor. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. In the description of this invention, it should be noted that the term "or" is generally used to include the meaning of "and / or," unless otherwise expressly indicated.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or a magnetic connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, in the description of this application, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0025] Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0026] To address the problems existing in the prior art, embodiments of the present invention provide a magnetically held penetration testing device for radioactive material transport containers, such as... Figure 1-3As shown, the device includes a main body 1, a guide tube 2, a control and display module 7, a laser control module 9, a magnetic holding electromagnet 10, and a laser ranging probe 11. The main body 1 houses and fixes the various functional components, forming an overall load-bearing and operating interface. The guide tube 2 is used to install the penetration test rod and provide guidance during release, ensuring that the incident direction and attitude are consistent. The control and display module 7 controls the on / off state of the magnetic holding electromagnet 10 and performs status acquisition and display, realizing human-machine interaction. The laser control module 9 drives and manages the operation of the laser ranging probe 11 and outputs measurement data. The magnetic holding electromagnet 10 is used to lift, hold, and release the penetration test rod. The laser ranging probe 11 is used to perform non-contact measurement of the lifting height, providing feedback for test parameters. The device has a built-in battery 8 and supports remote release and power display. The device has no special requirements for the operating site or external power supply and can independently complete the test without mains power.

[0027] like Figure 1 As shown, the main body 1 of the device adopts a vertical box structure, with four hoisting interfaces 6 at its four corners. These four hoisting interfaces 6 are identical in size and shape and are connected to the inner frame of the main body 1 via reinforcing sleeves. They are used to install lifting eye bolts to achieve hoisting, height adjustment, and leveling of the entire machine. The front panel of the main body 1, from top to bottom, features a display screen 5, a switch 3, and a charging interface 4. The display screen 5 is flush with the panel and has a transparent protective window; the switch 3 is the main power switch. Figure 2 As shown, the device body 1 also contains a battery 8. The charging interface 4 is electrically connected to the battery 8 and is equipped with a dustproof and waterproof cover. The battery 8 is connected to both the switch 3 and the charging interface 4. Figure 2 As shown, the device body 1 is equipped with a bearing plate and several supporting ribs. From top to bottom, the control display module 7, the laser control module 9 and the battery 8 are fixed in sequence, forming a compact vertical arrangement. The battery 8 and the control display module 7 are arranged in parallel in the middle of the device body 1 to adjust the center of gravity of the whole machine. The laser control module 9 is located below the battery 8.

[0028] like Figure 1 and Figure 2As shown, the guide tube 2 is fixed to the lower frame of the device body 1, with its axis vertical and serving as the mechanical reference line for the entire machine (the device). Preferably, the guide tube 2 is a metal pipe, detachably connected to the device body 1 via a flange. The inner diameter of the guide tube 2 is slightly larger than the outer diameter of the penetration test rod, allowing the penetration test rod to slide with low friction and maintain a stable posture within the guide tube 2. Preferably, the radial clearance between the inner diameter of the guide tube 2 and the outer diameter of the penetration test rod (long rod-shaped) is 0.25-0.75 mm. The outlet end of the guide tube 2 is chamfered or fitted with a replaceable wear-resistant bushing to avoid interference with the end of the penetration test rod during release. More preferably, the penetration test rod is made of metal. To address the need for controlling the falling posture of a longer test rod, the guide tube 2 provides axial constraint throughout the release process, ensuring that the falling posture is consistent with the initial posture and avoiding incident deviation caused by sudden changes in posture.

[0029] The magnetic holding electromagnet 10 is fixed above the guide tube 2 by a mounting base. Simultaneously, the magnetic holding electromagnet 10 is located inside the device body 1, positioned to the lower left of the laser control module 9 when viewed vertically. Preferably, the magnetic attraction surface line of the magnetic holding electromagnet 10 is coaxial or parallel to the axis of the guide tube 2, with a center deviation of no more than 0.3mm. The magnetic holding electromagnet 10 is equipped with a connecting part for attaching the upper end of the penetrating test rod's hanging ring. The magnetic holding electromagnet 10 retains its magnetism when power is off and loses its magnetism when power is on, thus corresponding to the holding and instantaneous release of the penetrating test rod, respectively. To improve safety, the lead wire of the magnetic holding electromagnet 10 is led to the circuit cavity via a wire groove and can be optionally equipped with a redundant coil or mechanical safety buckle to deal with abnormal conditions. Due to the magnetic holding structure, the magnetic holding electromagnet 10 maintains its attraction to the test rod in abnormal situations such as power outages or wire breaks, preventing accidental release and eliminating the need for an additional mechanical safety locking structure.

[0030] like Figure 2 As shown, a laser ranging probe 11 is installed inside the device body 1, and the laser ranging probe 11 is parallel to the magnetically held electromagnet 10. Figure 2 and Figure 3As shown, the laser ranging probe 11 is equipped with multiple laser sensors to form a multi-sensor collaborative ranging system, namely, the first laser sensor 111, the second laser sensor 112, the third laser sensor 113, and the fourth laser sensor 114. The emission / reception optical axes of the four laser sensors are basically parallel to the axis of the guide tube 2 and point to the target surface together, forming a rectangular array to perform non-contact ranging on the measured surface. Each laser sensor has a visible crosshair indicator line. The intersection of the crosshair indicator lines of the four sensors is defined as the impact point and coincides with the axis of the guide tube 2, used to visually indicate the impact point position. The control display module 7 synchronously collects and filters the four-channel distance data, calculates the average value as the real-time height reading of the display screen 5; when the four-channel ranging values ​​are consistent (or the difference is less than the preset threshold), it is determined that the device has reached a horizontal state; if the difference between any two channels exceeds the threshold, an audible (or visual) alarm is triggered and the four height values ​​are displayed on the display screen 5 respectively, guiding the operator to adjust the device posture through the hoisting interfaces 6 at the four corners of the top plate until it is restored to a horizontal state. The aforementioned four laser sensors work together to achieve both visual indication of the landing point and improved accuracy and robustness of height measurement through redundancy and consistency checks. The multiple laser sensors are respectively arranged around the magnetically held electromagnet 10, forming a ring around it, and are positioned at the four bottom corners of the device body 1. Simultaneously, the transmitting / receiving optical axis of the laser ranging probe 11 is substantially parallel to the axis of the guide tube 2 and aligned with the reflective surface being measured. The reflective surface being measured can be placed on the upper cap or follower baffle of the test rod. The output end of the laser ranging probe 11 is electrically connected to the laser control module 9, used to transmit real-time distance data to the control display module 7.

[0031] The control and display module 7 is located within the device body 1, parallel to the battery 8, and includes a main control unit, input / output interface, human-machine interface circuit, power drive circuit, and power management unit. The input terminals of the control and display module 7 are connected to the battery power detection circuit of the battery 8 and the laser control module 9, respectively, for collecting battery power and measurement data from the laser ranging probe 11. The output terminal of the control and display module 7 is connected to the display screen 5 to display device status information, which includes at least battery power and lifting height. The control and display module 7 is also electrically connected to the drive circuit of the magnetic holding electromagnet 10, for outputting on / off commands to the magnetic holding electromagnet 10, so that the magnetic holding electromagnet 10 retains its magnetism when de-energized and loses its magnetism when energized, thereby achieving a controlled "lift-hold-release" action on the penetrating test rod. Preferably, the control and display module 7 also provides a remote trigger interface or wireless communication module, and forms an interlock logic with the switch 3, allowing remote release only after the switch 3 is turned on and unlocked via the interface. Remote release is performed under the premise of meeting the interlock conditions and attitude threshold, improving the safety and convenience of remote operation.

[0032] The laser control module 9 is electrically connected to the laser ranging probe 11, used for power supply, triggering, and signal conditioning. It communicates with the control display module 7 via a serial bus or I / O port, uploading filtered / averaged ranging data. The laser control module 9 is located inside the device body 1, above the laser ranging probe and the magnetically held electromagnet. The control display module 7 calculates the current lifting height based on the zero-point calibration data and displays it on the display screen 5 in numerical or graphical form. Preferably, the control display module 7 has a built-in data storage unit for recording parameters such as test height and release timestamp, which can be exported via a wired / wireless interface.

[0033] In terms of assembly, the support plate of the device body 1 serves as the reference plane, the axis of the guide tube 2 serves as the reference line of the whole machine, and the center of the magnetic attraction surface of the magnetic holding electromagnet 10 is coaxially positioned with the reference line; the laser ranging probe 11 is set parallel to the magnetic holding electromagnet 10; the display screen 5, switch 3 and charging interface 4 are all installed flush with the front panel and are equipped with sealing rings to improve the environmental protection level.

[0034] Through the above structural design, this invention uses the axis of the guide tube 2 as a unified mechanical reference to integrate the magnetic holding electromagnet 10, the laser ranging probe 11, the control and display module 7, and the laser control module 9 into an integrated measurement and control release system. During the standby and lifting phases, the magnetic holding electromagnet 10 is kept de-energized to prevent accidental fall of the test rod and to reduce energy consumption. The laser ranging probe 11, parallel to the magnetic holding electromagnet 10, performs non-contact synchronous height measurement. The laser control module 9 triggers and conditions the ranging signal, and the control and display module 7 filters, calibrates, and performs difference judgment on the dual-channel data to monitor attitude deviation. The display screen 5 outputs real-time status information such as battery power and lifting height. When the height reaches the set value and the safety conditions are confirmed by the interlocking logic of switch 3 and control display module 7, control display module 7 sends a power-on release command to electromagnet 10, causing it to instantly demagnetize. The test rod is then perpendicularly incident along the axis under the constraint of guide tube 2 to complete the test. During and after the test, relevant parameters are stored by control display module 7 and can be exported via charging interface 4 (which can also serve as an external power supply / data port in this embodiment). The device body 1 adopts a vertical box and has four-point hoisting interface 6 on the top plate for quick positioning and leveling. Battery 8 and control display module 7 are arranged parallel in the middle of the housing to form a low center of gravity. The modular structure of guide tube 2 with wear-resistant bushings is adapted to test rods of different specifications. Thus, the device simultaneously achieves safe release (power-off self-protection), high-definition and anti-attitude deviation measurement, rapid deployment and traceable recording, effectively solving the problems of unsafe release, inaccurate height measurement and difficulty in guaranteeing the incident attitude in the prior art. In addition, the lifting height of this device can be freely set as needed, and it supports lifting to a specified height by overhead cranes, truck cranes, etc. It is compatible with the 1.0m penetration test and 1.7m penetration test specified in GB11806, and can also be used for other height situations, realizing multiple test objectives of "one device for multiple purposes".

[0035] In some preferred embodiments, the power system is powered by a battery 8, which is preferably a rechargeable lithium battery pack equipped with overcharge, over-discharge, overcurrent, and short-circuit protection functions.

[0036] In some preferred embodiments, the charging interface 4 is connected to the battery 8 to enable external charging. The charging interface 4 can also serve as an external DC power input terminal to achieve "charging while using".

[0037] In some preferred embodiments, switch 3 is connected in series between battery 8 and each power-consuming unit as a main power control element.

[0038] This invention also provides a test method for the above-mentioned penetration test device, comprising the following steps: S1: Arrival and sample confirmation; Transport the radioactive material to be tested in its transport container (package) to the test site, complete the site isolation and warning setup according to the operating procedures; inspect the appearance of the package and identify the sample, and record the number and appearance condition; S2: Equipment placement and hoisting; Prepare the test device. Install lifting eye bolts on the lifting interfaces 6 at the four corners of the top plate of the device body 1. Use 4 slings to connect to the crane (or lifting mechanism) to keep the device horizontal and securely fixed. S3: Power-on self-test; When switch 3 is closed, the control display module 7 completes the online self-test of battery 8, laser control module 9 and laser ranging probe 11, and the display screen 5 displays the device status and power. S4: Install the test rod; Insert the test rod into the guide tube 2 from top to bottom, and ensure that the upper end of the rod is reliably attracted to the connection between the upper end of the rod and the magnetic holding electromagnet 10 (with the electromagnet 10 in a de-energized holding state). Confirm that the attraction force meets the standard. S5: Alignment and zero setting; Fine-tune the device's posture to ensure that the lowest point of the penetrating test rod accurately coincides with the predetermined test point on the container; then, use the control display module 7 to set the device's displayed height to zero, thus completing the zero-position calibration of the distance measurement. S6: Raise to the target height; The lifting mechanism lifts the entire device, and the guide tube 2 provides axial guidance for the test bar. The lifting stops when the height reading on the display screen 5 reaches 1.0 m (preferably determined by the average value of the dual probes 11, and an alarm is given if the difference exceeds the limit). Alternatively, the target height can be set to 1.7 m or other specified values ​​according to the test plan to meet different penetration conditions of standards such as GB11806. S7: Controlled release; When the interlocking conditions are met (switch 3 is turned on, authorization is unlocked, power and sensor status are normal, and attitude deviation is within the threshold), the remote control device sends an energizing command to the electromagnet 10 through the control display module 7, causing it to instantly lose its magnetism. The penetration test rod is then perpendicularly incident on the test point of the container along the axis of the guide tube 2 to complete the penetration test. S8: Inspection and Recording; The deformation, penetration, and surrounding conditions of the cargo package are inspected and recorded, and photos / measurements are taken when necessary. The control display module 7 automatically stores data such as target height, measured height, and timestamp, which can be exported via the charging interface 4 (an embodiment that can also be used as a data port). S9: Finishing and resetting; Clean up the site, turn off switch 3, remove the test bar and check the integrity of guide tube 2 and wear-resistant bushing; if the test needs to continue, the specification of guide tube 2 can be changed or the target height can be reset; remove the slings and transfer or store the device. S10: Judgment and Retention (optional); The test results are assessed for compliance with applicable standards / procedures (such as penetration depth, deformation threshold, etc.), and test records and reports are generated and archived for future reference.

[0039] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of the present invention.

Claims

1. A magnetically held penetration testing device for a radioactive material transport container, characterized in that, It includes the device body, guide tube, laser control module, magnetic holding electromagnet and laser ranging probe; The main body of the device adopts a vertical box structure to house the laser control module, the magnetic holding electromagnet, and the laser ranging probe. The guide tube is fixed to the lower frame of the device body and is detachably connected to the device body through a flange. Its axis is vertical and serves as the mechanical reference line of the device. The penetrating test rod is installed in the guide tube, and the inner diameter of the guide tube is slightly larger than the outer diameter of the penetrating test rod. The magnetic holding electromagnet is disposed inside the device body and located above the guide tube. The magnetic attraction surface line of the magnetic holding electromagnet is coaxial or parallel to the axis of the guide tube. The laser control module is electrically connected to the laser ranging probe. The laser ranging probe is equipped with multiple laser sensors, which are respectively arranged around the magnetically held electromagnet at the four corners of the bottom of the device body. The laser control module is located above the magnetically held electromagnet and the laser ranging probe.

2. The penetration testing apparatus according to claim 1, characterized in that, It also includes a control and display module, which is located inside the device body and includes a main control unit, an input / output interface, a human-machine interface circuit, a power drive circuit, and a power management unit. The input terminal of the control and display module is connected to the laser control module.

3. The penetration testing apparatus according to claim 1, characterized in that, The device body includes a front panel, which has a display screen, a switch and a charging interface arranged from top to bottom.

4. The penetration testing apparatus according to claim 3, characterized in that, The device body is also equipped with a battery, which is connected to the switch and the charging interface respectively.

5. The penetration testing apparatus according to claim 1, characterized in that, The device body is equipped with a bearing plate and several supporting ribs to fix the laser control module, magnetic holding electromagnet and laser ranging probe.

6. The penetration testing apparatus according to claim 1, characterized in that, The number of laser sensors is four. The intersection of the visible crosshairs of the four laser sensors is defined as the impact point. When the distance measurement values ​​of the four laser sensors are consistent or the difference is less than a preset threshold, the device is determined to be in a horizontal state and the average height is fed back. Otherwise, an audible / visual alarm is triggered and four height values ​​are fed back respectively.

7. The penetration testing apparatus according to claim 1, characterized in that, The radial gap between the inner diameter of the guide tube and the outer diameter of the penetration test rod is 0.25-0.75 mm.

8. The penetration testing apparatus according to claim 1, characterized in that, The rod used for the penetration test is a long rod.

9. The penetration testing apparatus according to claim 8, characterized in that, The rod used for the penetration test is a metal rod.

10. The penetration testing apparatus according to any one of claims 1-8, characterized in that, The device body is equipped with hoisting interfaces at the four corners of its top to adjust the device's posture.

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