Magnetic shielding barrel adaptive test system and method

Abstract

The invention relates to the technical field of electromagnetic shielding testing, in particular to a self-adaptive testing system and method for a magnetic shielding barrel, the magnetic shielding barrel serves as a key electromagnetic shielding part and is widely applied to the fields of nuclear power, medical equipment, precise instruments and the like, and the accurate testing of the shielding performance of the magnetic shielding barrel is directly related to the reliability of equipment operation. In the prior art, a test system of a magnetic shielding barrel generally has many problems such as poor compatibility of test equipment, high manual dependency and low system integration, and different models of magnetic shielding barrels need to be equipped with test coils and fixing brackets with specific sizes, so that the equipment is repeatedly purchased, materials are wasted and the maintenance cost is high. For example, when a barrel body with a large diameter difference is tested, a coil and a support need to be replaced frequently, and the test efficiency is seriously influenced, the invention aims to solve the existing problems, and provides a self-adaptive test system and method for a magnetic shielding barrel. The device has the advantages of being adaptive to magnetic shielding barrels of different sizes, achieving full-process automatic testing and improving testing efficiency and accuracy.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic shielding testing technology, specifically to an adaptive testing system and method for magnetic shielding barrels. Background Technology

[0002] Magnetic shielding barrels, as key electromagnetic shielding components, are widely used in nuclear power, medical equipment, and precision instruments. Accurate testing of their shielding performance directly affects the reliability of equipment operation. Current testing systems for magnetic shielding barrels generally suffer from numerous problems, such as poor compatibility of testing equipment, high reliance on manual labor, and low system integration. Different models of magnetic shielding barrels require specific-sized test coils and mounting brackets, leading to redundant equipment purchases, material waste, and high maintenance costs. For example, when testing barrels with significantly different diameters, frequent replacement of coils and brackets is necessary, severely impacting testing efficiency. Existing testing processes require manual adjustment of the barrel position and sensor height, as well as connection of multiple testing devices. This is complex and prone to human error. Furthermore, the testing equipment is scattered and independent, lacking a unified control platform, and data acquisition and analysis require multiple steps. While recent research has attempted to improve testing systems, it has failed to achieve full automation and exhibits significant shortcomings in adaptive adjustment accuracy and multi-physics integrated testing. Therefore, there is an urgent need for a solution that can adapt to magnetic shielding barrels of various sizes, achieve fully automated testing, and integrate multiple functions to improve testing efficiency and accuracy while reducing overall costs. Summary of the Invention

[0003] The purpose of this invention is to solve the existing problems by providing an adaptive testing system and method for magnetic shielding barrels, which has the advantages of adapting to magnetic shielding barrels of different sizes, realizing fully automated testing, and improving testing efficiency and accuracy.

[0004] The technical solution of the present invention is as follows: An adaptive testing system for a magnetically shielded barrel includes: a conveyor belt, an adaptive frame, and an integrated testing module. The conveyor belt is equipped with replaceable magnetically shielded barrel transport supports. The adaptive frame has a built-in adjustable coil array for dynamically generating a uniform magnetic field based on the barrel's dimensions. The integrated testing module includes a host computer, a signal generator, a power amplifier, and a data acquisition unit. The adaptive frame employs a multi-level nested telescopic structure, comprising at least three concentric nested rods. The rods are segmented and fixed by electromagnetic locking devices with a locking interval of 1-10mm. Cooling channels are integrated within the nested rods to circulate cooling media. The conveyor belt is driven by a servo motor controlled by the host computer, and a laser positioning sensor precisely positions the magnetically shielded barrel to the center of the frame with an error range ≤ ±0.5mm. An adjustable probe is also installed within the adaptive frame. The front of the adaptive frame has an automatically opening and closing frame door, which, when closed, forms a complete electromagnetic shielding layer with a shielding effectiveness ≥60dB.

[0005] As a preferred technical solution, the surface of the nested rod is coated with a ceramic wear-resistant layer with a thickness of 0.1-0.3mm, and the cooling channel is linked with the external semiconductor cooling chip to adjust the cooling intensity according to the coil temperature.

[0006] As a preferred technical solution, the signal generator outputs an adjustable sine wave signal with a frequency range of 10Hz-10MHz; the power amplifier amplifies the signal power to an adjustable range of 10W-1kW; the data acquisition unit captures oscilloscope data in real time at a sampling rate of not less than 1MS / s; the above modules communicate synchronously with the host computer via a bus protocol.

[0007] As a preferred technical solution, the adjustable coil array is composed of magnetically attached modular units, which supports the dynamic splicing of circular, rectangular and sector-shaped coils. The host computer automatically generates the optimal magnetic field distribution model according to the size of the barrel.

[0008] As a preferred technical solution, the adaptive frame is made of carbon fiber-basalt fiber hybrid composite material with an embedded graphene conductive layer. The resistivity is ≤10^-4 Ω·m, and the key connection parts use shape memory polymer, which can restore the initial shape at temperatures above 80°C.

[0009] As a preferred technical solution, the host computer integrates AI optimization algorithms, analyzes historical test data through convolutional neural networks, and adjusts the probe scanning path and magnetic field strength in real time, thereby improving test efficiency by more than 30%.

[0010] As a preferred technical solution, the automatic opening and closing frame door is equipped with an infrared proximity sensor and a pressure feedback unit. When a foreign object is detected blocking the door, the closing is automatically interrupted and an audible and visual alarm is triggered.

[0011] As a preferred technical solution, the adjustable probe further integrates a temperature and humidity sensor (accuracy ±0.5℃ / ±3%RH) and a triaxial vibration sensor (bandwidth 0-5kHz) to form a multi-physics field integrated testing platform, which is suitable for extreme environment verification of nuclear power plant shielding containers.

[0012] Furthermore, this application also proposes an adaptive testing method for magnetically shielded barrels, comprising the following steps: S1: The magnetic shielding barrel is transported to the center of the frame via a conveyor belt, and the laser positioning sensor sends the coordinates back to the host computer. S2: The host computer calculates the optimal frame extension ratio or folding angle based on the barrel size and drives the electromagnetic locking device or linkage mechanism to complete the adaptation. S3: Close the frame door and start the shielding effectiveness test. If the shielding layer integrity meets the standard (mesh density > 95%), then proceed to the testing phase. S4: The probe scans the barrel along a preset spiral path, simultaneously applying a stepped increasing magnetic field (10-1000A / m), and the data acquisition unit records the shielding attenuation curve; S5: Based on the least squares method to fit the data, generate a shielding efficiency report and anomaly heatmap.

[0013] Furthermore, this application also proposes to compare the current data with the historical database in real time during the test, and to dynamically correct the probe's motion trajectory through a fuzzy PID algorithm.

[0014] The beneficial effects of this invention are as follows: Significantly improves equipment compatibility and cost-effectiveness, solves the problem of poor compatibility of testing equipment, adopts nested, foldable or pneumatically driven adaptive frames, can adapt to different models of magnetic shielding barrels with diameter differences of up to 200%, without the need to replace special coils or brackets, saving about 60% of equipment purchase costs.

[0015] The entire process is automated, solving the problem of low efficiency due to manual adjustment. Through the upper computer-controlled conveyor belt and multi-axis robotic arm probe, the entire process of barrel positioning, probe adjustment and test execution is automated, reducing manual intervention by more than 80% and improving test efficiency by 3-5 times.

[0016] High integration and multi-functional expansion solve the problem of low system integration. It integrates a signal generator, power amplifier, data acquisition unit and temperature / humidity / vibration sensor, and realizes one-click testing through a unified bus protocol. The complexity of device connection is reduced by 70% and the operation time is shortened by 50%. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is a front view of the present invention; Figure 3 This is a schematic diagram of the internal nested rods of the adaptive frame of the present invention; Figure 4 This is a schematic diagram of the internal components of the present invention; In the attached diagram: 1. Conveyor belt; 2. Adaptive frame; 3. Integrated test module; 4. Magnetic shielded barrel conveyor support; 5. Adjustable coil array; 6. Host computer; 7. Signal generator; 8. Power amplifier; 9. Data acquisition unit; 10. Nested rod; 11. Adjustable probe; 12. Automatic opening and closing frame door. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] like Figure 1-4 As shown, an adaptive testing system for a magnetic shielding barrel includes: a conveyor belt 1, an adaptive frame 2, and an integrated testing module 3. The conveyor belt is equipped with a replaceable magnetic shielding barrel transport bracket 4. The adaptive frame has a built-in adjustable coil array 5 for dynamically generating a uniform magnetic field according to the barrel's size. The integrated testing module includes a host computer 6, a signal generator 7, a power amplifier 8, and a data acquisition unit 9. The adaptive frame adopts a multi-level nested telescopic structure, which includes at least three concentric nested rods 10. The rods are segmented and fixed by an electromagnetic locking device with a locking interval of 1-10mm. Cooling channels are integrated within the nested rods to circulate cooling media. The conveyor belt is driven by a servo motor controlled by the host computer 6, and a laser positioning sensor precisely positions the magnetic shielding barrel to the center of the frame with an error range ≤ ±0.5mm. The adaptive frame 2 also includes an adjustable probe 11, and an automatically opening and closing frame door 12 at the front. When closed, it forms a complete electromagnetic shielding layer with a shielding effectiveness ≥60dB.

[0020] Furthermore, the surface of the nested rod 10 is coated with a ceramic wear-resistant layer with a thickness of 0.1-0.3mm, and the cooling channel is linked with the external semiconductor cooling chip to adjust the cooling intensity according to the coil temperature. The ceramic wear-resistant layer refers to an aluminum oxide-based composite coating formed on the surface of the metal rod through a thermal spraying process, which can be achieved by plasma spraying technology, to reduce frictional loss between the rods during telescopic movement.

[0021] Furthermore, signal generator 6 outputs an adjustable sine wave signal with a frequency range of 10Hz-10MHz; power amplifier 8 amplifies the signal power to an adjustable 10W-1kW; data acquisition unit 9 captures oscilloscope data in real time at a sampling rate of no less than 1MS / s. These modules communicate synchronously with the host computer 6 via a bus protocol. Signal generator 7 outputs a wide-band adjustable sine wave signal, which is then amplified to the target power by power amplifier 8 and applied to the test coil to generate a standardized excitation magnetic field. Data acquisition unit 9 captures the response signal of the shielded barrel at a high sampling rate and transmits the test data to the host computer in real time via the bus protocol. Because signal generator 7, power amplifier 8, and data acquisition unit 9 communicate synchronously via the bus protocol, the host computer 6 can uniformly coordinate the operating parameters of each module, avoiding test deviations caused by manual asynchronous adjustments in traditional distributed equipment.

[0022] Furthermore, the adjustable coil array 5 is composed of magnetically attached modular units, supporting the dynamic splicing of circular, rectangular, and fan-shaped coils. The host computer 6 automatically generates an optimal magnetic field distribution model based on the barrel size. When magnetically shielded barrels of different sizes enter the test area, the magnetically attached modular units quickly adsorb and combine under magnetic force. Based on the three-dimensional data of the barrel obtained by the laser positioning sensor, the host computer 6 calls a preset coil shape database to match geometric parameters and drives the modular units to move along a preset track to the target position.

[0023] Furthermore, the adaptive frame 2 is made of carbon fiber-basalt fiber hybrid composite material with an embedded graphene conductive layer. The resistivity is ≤10^-4 Ω·m, and the key connection parts use shape memory polymer, which can restore the initial shape at temperatures above 80°C.

[0024] Furthermore, the host computer 6 integrates AI optimization algorithms, analyzes historical test data through convolutional neural networks, and adjusts the probe scanning path and magnetic field strength in real time, thereby improving test efficiency by more than 30%.

[0025] Furthermore, the automatic opening and closing frame door 12 is equipped with an infrared proximity sensor and a pressure feedback unit. When a foreign object is detected blocking the door, the closing is automatically interrupted and an audible and visual alarm is triggered.

[0026] Furthermore, the adjustable probe 11 integrates a temperature and humidity sensor (accuracy ±0.5℃ / ±3%RH) and a triaxial vibration sensor (bandwidth 0-5kHz), forming a multi-physics integrated testing platform suitable for extreme environment verification of nuclear power plant shielding containers. Building upon its existing electromagnetic shielding testing capabilities, the adjustable probe 11, by embedding the temperature and humidity sensor and the triaxial vibration sensor, enables simultaneous acquisition of multiple parameters. In the nuclear power plant shielding container testing scenario, the probe captures environmental temperature and humidity data and container vibration signals in real time during scanning and correlates them with electromagnetic shielding attenuation data for analysis.

[0027] Furthermore, this application also proposes an adaptive testing method for magnetically shielded barrels, comprising the following steps: S1: The magnetic shielding barrel is transported to the center of the frame via a conveyor belt, and the laser positioning sensor sends the coordinates back to the host computer. S2: The host computer calculates the optimal frame extension ratio or folding angle based on the barrel size and drives the electromagnetic locking device or linkage mechanism to complete the adaptation. S3: Close the frame door and start the shielding effectiveness test. If the shielding layer integrity meets the standard (mesh density > 95%), then proceed to the testing phase. S4: The probe scans the barrel along a preset spiral path, simultaneously applying a stepped increasing magnetic field (10-1000A / m), and the data acquisition unit records the shielding attenuation curve; S5: Based on the least squares method to fit the data, generate a shielding efficiency report and anomaly heatmap.

[0028] Furthermore, this application also proposes to compare the current data with the historical database in real time during the test, and to dynamically correct the probe's motion trajectory through a fuzzy PID algorithm.

[0029] Working Principle: During the testing process, the magnetic shielding barrel is first automatically transported to the testing station via a conveyor belt. A laser positioning sensor provides real-time feedback of the barrel's position coordinates. Based on this coordinate data, the host computer drives an electromagnetic locking device to adjust the frame dimensions, ensuring a precise match between the testing area and the barrel's geometry. After the frame door closes, the integrity of the shielding layer is determined by detecting the mesh density. Once the conditions are met, a magnetic field is applied and the probe scans. The probe moves along a pre-generated spiral path, while a signal generator outputs a stepped-intensified magnetic field signal. The data acquisition unit simultaneously records the shielding attenuation data at each stage. After the test is completed, the least squares method is used to perform curve fitting on the discrete test points, generating a quantitative shielding efficiency report and marking the coordinates of any abnormal areas.

[0030] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An adaptive testing system for a magnetically shielded barrel, characterized in that, include: The system comprises a conveyor belt (1), an adaptive frame (2), and an integrated testing module (3). The conveyor belt (1) is equipped with a replaceable magnetic shielding barrel conveyor support (4). The adaptive frame (2) has a built-in adjustable coil array (5) for dynamically generating a uniform magnetic field according to the barrel size. The integrated testing module (3) includes a host computer (6), a signal generator (7), a power amplifier (8), and a data acquisition unit (9). The adaptive frame (2) adopts a multi-level nested telescopic structure, which includes at least three concentric nested rods (1). 0), the rods are fixed in sections by electromagnetic locking devices with a locking interval of 1-10mm. The nested rod (10) integrates a cooling channel to circulate the cooling medium. The conveyor belt (1) is driven by a servo motor controlled by a host computer (6) and, together with a laser positioning sensor, accurately positions the magnetic shielding barrel to the center of the frame with an error range of ≤±0.5mm. An adjustable probe (11) is also provided in the adaptive frame (2). An automatic opening and closing frame door (12) is provided at the front of the adaptive frame (2). After closing, a complete electromagnetic shielding layer is formed with a shielding effectiveness ≥60dB.

2. The adaptive testing system for a magnetically shielded barrel according to claim 1, characterized in that: The surface of the nested rod (10) is coated with a ceramic wear-resistant layer with a thickness of 0.1-0.3 mm, and the cooling channel is linked with the external semiconductor cooling chip to adjust the cooling intensity according to the coil temperature.

3. The adaptive testing system for a magnetically shielded barrel according to claim 1, characterized in that: The signal generator (7) outputs an adjustable sine wave signal with a frequency range of 10Hz-10MHz; the power amplifier (8) amplifies the signal power to an adjustable range of 10W-1kW; the data acquisition unit (9) captures oscilloscope data in real time at a sampling rate of not less than 1MS / s; the above modules communicate synchronously with the host computer (6) through a bus protocol.

4. The adaptive testing system for a magnetically shielded barrel according to claim 1, characterized in that: The adjustable coil array is composed of magnetically attached modular units, which supports the dynamic splicing of circular, rectangular and fan-shaped coils. The host computer (6) automatically generates the optimal magnetic field distribution model according to the barrel size.

5. The adaptive testing system for a magnetically shielded barrel according to claim 1, characterized in that: The adaptive frame (2) is made of carbon fiber-basalt fiber hybrid composite material with an embedded graphene conductive layer and a resistivity of ≤10^-4Ω·m.

6. The adaptive testing system for a magnetically shielded barrel according to claim 1, characterized in that: The host computer (6) integrates AI optimization algorithms, analyzes historical test data through convolutional neural networks, and adjusts the probe scanning path and magnetic field strength in real time.

7. The adaptive testing system for a magnetically shielded barrel according to claim 1, characterized in that: The automatic opening and closing frame door (12) is equipped with an infrared proximity sensor and a pressure feedback unit.

8. The adaptive testing system for a magnetically shielded barrel according to claim 1, characterized in that: The adjustable probe (11) further integrates a temperature and humidity sensor and a triaxial vibration sensor.

9. An adaptive testing method for a magnetically shielded barrel, characterized in that, Includes the following steps: S1: The magnetic shielding barrel is transported to the center of the frame via a conveyor belt, and the laser positioning sensor sends the coordinates back to the host computer. S2: The host computer calculates the optimal frame extension ratio or folding angle based on the barrel size and drives the electromagnetic locking device or linkage mechanism to complete the adaptation. S3: Close the frame door and start the shielding effectiveness test. If the shielding layer integrity meets the standard (mesh density > 95%), then proceed to the testing phase. S4: The probe scans the barrel along a preset spiral path, simultaneously applying a stepped increasing magnetic field (10-1000A / m), and the data acquisition unit records the shielding attenuation curve; S5: Based on the least squares method to fit the data, generate a shielding efficiency report and anomaly heatmap.

10. The combined use of the adaptive testing system for a magnetic shielded barrel according to claim 1 and the adaptive testing method for a magnetic shielded barrel according to claim 9, characterized in that: During the test, the current data is compared with the historical database in real time, and the probe's motion trajectory is dynamically corrected through a fuzzy PID algorithm.

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