Front beam control method based on electromagnetic shielding performance monitoring

Abstract

The invention discloses a front beam control method based on electromagnetic shielding performance monitoring, and the method comprises the steps: arranging an electromagnetic interference monitoring array in an Ek + combined front beam structure, the electromagnetic interference monitoring array is composed of a plurality of micro sensors, including a micro electromagnetic field sensor and a contact resistance sensor, and the micro sensors are arranged at the joints and joints of the front beam structure; a signal of an electromagnetic interference monitoring array is collected in real time through a front beam control unit, and the signal is composed of electromagnetic leakage signal strength collected by a miniature electromagnetic field sensor and / or conductive continuity data collected by a contact resistance sensor; the front beam control unit compares the signal with a preset threshold value and judges whether electromagnetic leakage abnormity exists or not; when it is detected that electromagnetic leakage is abnormal, a grounding calibration feedback mechanism is triggered, and the grounding state of the seam of the front beam is physically adjusted through a grounding calibration actuator; and the front beam control unit continuously monitors the signal and adjusts the grounding calibration actuator through feedback control until the signal is recovered to be below the preset threshold value.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of equipment electromagnetic shielding performance control, in particular to a front beam control method based on electromagnetic shielding performance monitoring. BACKGROUND

[0002] In modern high-performance computing equipment, communication systems and data center infrastructure, the electromagnetic compatibility and electromagnetic shielding performance of the server chassis are crucial. The chassis usually integrates a large number of high-frequency, high-speed digital circuits, which will generate significant electromagnetic radiation energy during operation. If there is no effective shielding measure, such electromagnetic radiation will escape through the physical gaps, assembly holes and other leakage points existing in the chassis structure, causing electromagnetic interference to the surrounding electronic equipment and affecting its normal working state; at the same time, electromagnetic noise in the external environment may also invade the chassis, interfering with the stable operation of the internal sensitive circuits. Therefore, ensuring that the chassis has excellent and continuous electromagnetic shielding capability is the key to guaranteeing the reliability and stability of the entire system.

[0003] The electromagnetic shielding performance of the chassis mainly depends on its structural design and manufacturing process. Especially in the splicing area, assembly interface and component connection area of the chassis, due to the inevitable physical gaps, they often become the main path of electromagnetic energy leakage. The front beam of the chassis, as a key structural part supporting the front panel, hard disk backboard, fan module and power supply unit, has complex structure and numerous interfaces, and in the long-term assembly, use or maintenance process, it is easy to cause the structure gap to expand or the electrically conductive continuity to be damaged due to screw loosening, mechanical deformation, ground connection deterioration, etc., thereby causing the electromagnetic shielding performance to decrease.

[0004] At present, there is a significant defect in the evaluation and monitoring of the electromagnetic shielding performance of the chassis in the prior art: the lack of real-time monitoring means. The traditional electromagnetic shielding performance evaluation is usually carried out by professional EMC laboratories in the product design and production stage, through offline and static testing, which cannot monitor the shielding performance change of the chassis in the actual use process in real time. Once the chassis is put into use, if the shielding performance decreases due to mechanical vibration, thermal expansion and contraction or improper maintenance, the system cannot self-perceive, thereby there is a potential electromagnetic interference risk, which is difficult to guarantee the reliability of the continuous operation of the equipment. SUMMARY

[0005] The present application provides a front beam control method based on electromagnetic shielding performance monitoring to overcome at least one technical problem in the related art.

[0006] According to the embodiments of the present application, a front beam control method based on electromagnetic shielding performance monitoring is provided, comprising: An electromagnetic interference monitoring array is arranged in the Ek+ combined front beam structure, the electromagnetic interference monitoring array is composed of a plurality of micro sensors, the micro sensors are micro electromagnetic field sensors or contact resistance sensors, and the micro sensors are arranged at the joints and connections of the front beam structure; A front beam control unit is configured to collect signals of the electromagnetic interference monitoring array in real time, the signals including electromagnetic leakage signal strength or electrically conductive continuity data; The front beam control unit compares the signals with preset thresholds to determine whether there is an electromagnetic leakage anomaly; When an electromagnetic leakage anomaly is detected, a grounding calibration feedback mechanism is triggered, and a grounding state at a joint of the front beam is physically adjusted by a grounding calibration actuator; The front beam control unit continuously monitors the signals and adjusts the grounding calibration actuator through feedback control until the signals return to below the preset thresholds.

[0007] In some optional embodiments, the Ek+ combined front beam structure is assembled by a plurality of modular beam bodies through connectors, the connectors are buckles or screws, the modular beam bodies are internally provided with spaces and channels for arranging electronic components, and the grounding calibration actuator is integrated in the Ek+ combined front beam structure.

[0008] In some optional embodiments, the micro electromagnetic field sensors are micro Hall effect sensors or three-axis magnetic field sensors based on MEMS technology, and the electromagnetic interference monitoring array is arranged at a front bumper corner, a gap between the front beam and a rack frame, and a connection point of a hard disk back plate. The front beam control unit processes the electromagnetic leakage signal strength by periodically reading magnetic field strength data at positions of the micro electromagnetic field sensors, digitally filtering the magnetic field strength data, comparing the filtered magnetic field strength with a preset magnetic field threshold, and determining that there is an electromagnetic leakage anomaly at a corresponding position if the preset magnetic field threshold is exceeded.

[0009] In some optional embodiments, the contact resistance sensor is pre-buried with an elastic conductive material at a joint to be monitored of the Ek+ combined front beam structure, the elastic conductive material is a conductive gasket or a conductive spring sheet, the contact resistance sensor is connected to the elastic conductive material through a test point to measure a resistance value, and the front beam control unit processes the electrically conductive continuity data by continuously monitoring the resistance value, comparing the resistance value with a preset resistance threshold, and determining that electrically conductive continuity at a corresponding position is invalid and there is a potential electromagnetic leakage risk if the preset resistance threshold is exceeded.

[0010] In some optional embodiments, the grounding calibration actuator includes an intelligent grounding pin and / or an adaptive grounding gasket. The intelligent grounding pin comprises a micro-actuator and a retractable metal pin, wherein the micro-actuator is a piezoelectric ceramic driver or a micro-step motor. The adaptive grounding gasket is made of a memory alloy or an electrostrictive material.

[0011] In some optional embodiments, the physical adjustment comprises at least one of the following: The front beam control unit outputs a driving signal to the micro-actuator to drive the retractable metal pin to retract or extend to change the contact pressure with the chassis frame. The front beam control unit applies a specific voltage or current to the adaptive grounding gasket to change the physical properties of the adaptive grounding gasket, so that the adaptive grounding gasket expands or changes shape to tightly fit the joint.

[0012] In some optional embodiments, the feedback control adopts a PID control algorithm, and the execution process of the PID control algorithm comprises the following steps: Step S1: The front beam control unit detects the electromagnetic leakage signal strength greater than a preset electromagnetic leakage safety threshold , or detects the joint resistance value greater than a preset resistance safety threshold , calculates the error , wherein or ; Step S2: Substitute the error into the PID control formula to calculate the control amount , wherein the PID control formula is: In the formula, the symbol represents a proportional coefficient, the symbol represents an integral coefficient, and the symbol represents a differential coefficient. Step S3: Convert the calculated control amount into a driving signal, wherein the driving signal is a driving voltage or a driving current, and apply the driving signal to the grounding calibration actuator; Step S4: The grounding calibration actuator acts according to the driving signal, if the grounding calibration actuator is an intelligent grounding pin, the micro-actuator drives the retractable metal pin to retract or extend to increase or decrease the contact pressure of the retractable metal pin with the chassis frame; if the grounding calibration actuator is an adaptive grounding gasket, the adaptive grounding gasket changes the physical properties according to the driving signal to achieve tight fitting with the joint; Step S5: The front beam control unit continuously monitors the electromagnetic leakage signal strength or a seam resistance value , repeating steps S1 to S4, adjusting the control amount according to the new error value , until and , the system reaches a steady state, and the feedback control is stopped; wherein the input of the PID control algorithm is the electromagnetic leakage signal strength or the resistance value , and the set value is the safety threshold or .

[0013] In some optional embodiments, the method further comprises an initialization step, comprising: When the system is started, the front beam control unit initializes the electromagnetic interference monitoring array and the grounding calibration actuator, and collects the baseline values of all sensors; The electromagnetic interference monitoring array performs periodic data collection at a preset frequency.

[0014] In some optional embodiments, when an electromagnetic leakage anomaly is detected, the front beam control unit generates an alarm event, records the event occurrence time, the sensor ID corresponding to the leakage path, and the abnormal value; If the signal continues to exceed the preset threshold, the front beam control unit generates a high-level alarm and sends it to the case management controller; if the signal returns to below the preset threshold, a calibration success event is recorded; The method further comprises a log recording step, comprising: storing the alarm event, high-level alarm, calibration success event, and related data in the local storage, and reporting to the external central management system through the case management controller.

[0015] In some optional embodiments, the grounding calibration feedback mechanism constitutes a closed-loop control system, and the control loop of the system includes the electromagnetic interference monitoring array, the front beam control unit, and the grounding calibration actuator; The front beam control unit continuously receives the signal feedback from the electromagnetic interference monitoring array, and according to the deviation of the signal from the preset threshold, it calculates and outputs the corresponding control amount to the grounding calibration actuator in real time, and the actuator dynamically adjusts the grounding state of the front beam seam.

[0016] The beneficial effects of the embodiments of the present specification are as follows: This technical solution utilizes a dedicated sensor array deployed in high-risk areas for electromagnetic leakage, namely the front beam joints and connections, to directly capture electromagnetic leakage intensity or conductivity continuity data characterizing shielding performance. This enables real-time, in-situ monitoring of the front beam's electromagnetic shielding performance, instantly detecting enhancements in electromagnetic leakage signals or degradation in conductivity continuity caused by mechanical vibration, thermal expansion and contraction, or loose connections. When the front beam control unit detects an anomaly based on a preset threshold, the system autonomously triggers a grounding calibration feedback mechanism, driving the actuator to dynamically adjust the physical grounding state. This changes the traditional passive mode relying on periodic manual maintenance or offline testing, forming a complete closed-loop control from perception and decision-making to execution. Furthermore, through continuous signal monitoring and feedback adjustment, the system maintains the grounding state at the front beam joints within the optimal range, significantly improving the stability and reliability of the chassis's electromagnetic shielding performance under complex operating conditions. This effectively suppresses the generation and leakage of electromagnetic interference, ensuring the normal operation of internal high-frequency circuits, while reducing the risk of system failure and maintenance costs due to shielding failure. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments or related technologies of this specification, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A flowchart illustrating a front beam control method based on electromagnetic shielding performance monitoring provided by the present invention; Figure 2 This is a schematic diagram of the front beam mechanical structure; Figure 3 A schematic diagram of the monitoring and control layout for intelligent grounding pins; Figure 4 This is a schematic diagram showing the working status of the intelligent grounding pin.

[0019] In this diagram, 1 represents the connecting fastener, 2 represents the segmentation marking line, 3 represents the integrated cavity of electronic components, 4 represents the modular beam body, 5 represents the beam splicing connection structure, and 6 represents the shell structure of the front beam control unit. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of one or more embodiments of this specification clearer, the technical solutions of one or more embodiments of this specification will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this specification, and not all of them. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of one or more embodiments of this specification.

[0021] It should be understood that although the terms first, second, third, etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another.

[0022] The technical solution of this application will be described below with reference to the accompanying drawings. Figure 1 This is a flowchart illustrating a front beam control method based on electromagnetic shielding performance monitoring, provided in an embodiment of this specification. The following is based on... Figure 1 The technical solution of this application is described, and the method may include the following steps: Step 102: Deploy an electromagnetic interference monitoring array in the Ek+ combined front beam structure. The electromagnetic interference monitoring array consists of multiple micro sensors, including micro electromagnetic field sensors and contact resistance sensors, and is arranged at the joints and connections of the front beam structure.

[0023] To enable those skilled in the art to more clearly understand the technical solution of this application, the concept of "Ek+ combined front beam structure" will be explained at a macro level below. The term "Ek+ combined front beam structure" refers to a structural design scheme applied to the load-bearing and support area at the front of a chassis or cabinet. Its characteristics are modularity, scalability and functional integration. This structure is usually assembled from multiple standardized sub-beam units through connectors (such as buckles and screws). Its design reserves internal space and wiring channels, creating physical conditions for seamlessly embedding electronic functional units such as wiring harnesses, sensors or actuators into the mechanical body.

[0024] In this application's technical solution, an electromagnetic interference monitoring array is deployed in the Ek+ combined front beam structure. This array consists of multiple micro-sensors, which are either micro-electro-field sensors or contact resistance sensors, and are arranged at the joints and connections of the front beam structure. The micro-electro-field sensors can be selected from micro-Hall effect sensors or triaxial magnetic field sensors based on Micro-Electro-Mechanical Systems (MEMS) technology. These sensors are small in size, have high magnetic field sensing sensitivity, and can be precisely deployed at locations such as... Figure 2The front beam mechanical structure shown includes seams and connections such as the area around the fastener 1 at the corner of the front baffle, the gap between the front beam and the frame, the interface area of ​​the beam splicing connection structure 5, the connection point of the hard disk backplane, and the electronic component integrated cavity 3, used to capture the intensity of electromagnetic leakage signals during equipment operation. Contact resistance sensors are installed at the monitored seams of the Ek+ combined front beam, such as the splicing parts of modular beams, with pre-embedded elastic conductive material pads or conductive springs. The contact resistance sensor connects to the elastic conductive material through a test point to measure the resistance value, thereby monitoring the continuity of conductivity data at the seam.

[0025] It should be noted that since the monitoring functions of the miniature electromagnetic field sensor and the contact resistance sensor are different—that is, the miniature electromagnetic field sensor is used to collect the electromagnetic leakage signal intensity EL, and the contact resistance sensor is used to collect the joint resistance value RL—in practical applications, one of them or a combination thereof can be selected and deployed according to the monitoring requirements of the front beam structure.

[0026] Step 104: The electromagnetic interference monitoring array signals are acquired in real time by the front beam control unit. The signals consist of the electromagnetic leakage signal intensity acquired by the miniature electromagnetic field sensor and / or the conductivity continuity data acquired by the contact resistance sensor.

[0027] In this step, the front beam control unit can be considered a dedicated embedded hardware system integrating signal acquisition, data processing, logic judgment, and control output functions. In this step, the front beam control unit acquires signals from the electromagnetic interference monitoring array in real time. Through its internally integrated acquisition module, the front beam control unit continuously acquires the output information of the miniature sensors in the electromagnetic interference monitoring array according to a preset cycle. The signals may include electromagnetic leakage signal strength or conductivity continuity data. Specifically, the electromagnetic leakage signal strength is acquired by miniature electromagnetic field sensors arranged at the joints and connections. Conductivity continuity data is acquired by contact resistance sensors. These sensors embed elastic conductive material pads or conductive springs at the joints to be monitored in the Ek+ combined front beam, such as the splicing parts of modular beams. The sensors are connected to the elastic conductive material through test points to measure the resistance value, thereby obtaining the conductivity continuity information at the joint.

[0028] Step 106: The front beam control unit compares the signal with a preset threshold to determine whether there is an electromagnetic leakage anomaly.

[0029] In this step, the preset threshold for the electromagnetic leakage signal strength can be determined based on the signal characteristics of the miniature electromagnetic field sensor under normal, leak-free conditions. When the signal strength exceeds the threshold, an electromagnetic leakage anomaly can be identified. The preset threshold for conductivity continuity data can be the resistance value range under normal conductivity conditions. When the resistance value collected by the contact resistance sensor exceeds this range, it is determined that the conductivity continuity at the joint has failed, indicating a potential electromagnetic leakage risk. Through this comparison method, the front beam control unit can accurately determine whether an electromagnetic leakage anomaly exists in the Ek+ combined front beam structure.

[0030] Step 108: When an electromagnetic leakage anomaly is detected, the grounding calibration feedback mechanism is triggered, and the grounding status at the front beam joint is physically adjusted through the grounding calibration actuator.

[0031] In this step, when an electromagnetic leakage anomaly is detected, a grounding calibration feedback mechanism is triggered. This mechanism physically adjusts the grounding state at the front beam joint using grounding calibration actuators (including intelligent grounding pins and adaptive grounding pads). The intelligent grounding pin consists of a micro-actuator (piezoelectric ceramic or micro-motor) and a retractable metal pin. The front beam control unit outputs a drive signal to the micro-actuator, causing the retractable metal pin to extend or retract, changing the contact pressure with the chassis frame. The adaptive grounding pad is made of shape memory alloy or electrostrictive material. The front beam control unit applies a specific voltage or current to it, altering its physical properties to cause it to expand or change shape to tightly fit the joint, thereby restoring or enhancing the conductive continuity at the front beam joint and effectively suppressing electromagnetic leakage.

[0032] Step 110: The front beam control unit continuously monitors the signal and adjusts the ground calibration actuator through feedback control until the signal recovers to below the preset threshold.

[0033] In this step, the front beam control unit continuously monitors the signals from the electromagnetic interference monitoring array, specifically the electromagnetic leakage signal strength or conductivity continuity data, and adjusts the grounding calibration actuator through feedback control based on these real-time signals. For the intelligent grounding pin, the front beam control unit adjusts the drive parameters of the micro-actuator in real time, accurately controlling the extension and retraction of the retractable metal pin to change the contact pressure. For the adaptive grounding pad, the applied voltage or current can be dynamically adjusted to change its physical characteristics. Throughout the process, the front beam control unit continuously compares the monitored signals with preset thresholds, constantly optimizing the actuator's adjustment until the signal recovers below the preset threshold, ensuring stable electromagnetic shielding performance at the front beam joint.

[0034] This technical solution utilizes a dedicated sensor array deployed in high-risk areas for electromagnetic leakage, namely the front beam joints and connections, to directly capture electromagnetic leakage intensity or conductivity continuity data characterizing shielding performance. This enables real-time, in-situ monitoring of the front beam's electromagnetic shielding performance, instantly detecting enhancements in electromagnetic leakage signals or degradation in conductivity continuity caused by mechanical vibration, thermal expansion and contraction, or loose connections. When the front beam control unit detects an anomaly based on a preset threshold, the system autonomously triggers a grounding calibration feedback mechanism, driving the actuator to dynamically adjust the physical grounding state. This changes the traditional passive mode relying on periodic manual maintenance or offline testing, forming a complete closed-loop control from perception and decision-making to execution. Furthermore, through continuous signal monitoring and feedback adjustment, the system maintains the grounding state at the front beam joints within the optimal range, significantly improving the stability and reliability of the chassis's electromagnetic shielding performance under complex operating conditions. This effectively suppresses the generation and leakage of electromagnetic interference, ensuring the normal operation of internal high-frequency circuits, while reducing the risk of system failure and maintenance costs due to shielding failure.

[0035] Based on the technical solutions described above, this application also provides some more specific technical solutions, which are described below.

[0036] In an optional embodiment, the Ek+ combined front beam structure is assembled from multiple modular beams that can be assembled and disassembled by connectors, which are clips or screws; the interior of the modular beams is reserved with space and channels for laying electronic components, and the grounding calibration actuator is integrated into the Ek+ combined front beam structure.

[0037] In this embodiment, the Ek+ combined front beam structure can be assembled from multiple modular beams that can be assembled and disassembled via connectors, preferably clips or screws. Figure 2 As shown in the diagram, the modular beam body 4 constitutes the functional modules of the front beam. Its geometry and dimensions are designed to ensure accurate docking with other modules. The beam splicing connection structure 5 serves as the connection point between modules, providing a reliable physical interface for the assembly of each modular beam. The connecting fasteners 1 use screw-type fasteners, which securely connect the beam splicing connection structure 5 to the modular beam body 4 through threaded connections, ensuring the overall stability of the assembled modules. This modular design allows the Ek+ combined front beam structure to be flexibly assembled or disassembled according to equipment functional requirements and maintenance scenarios. For example, during equipment upgrades, modular beams with new functions can be replaced individually; during fault repairs, only the specific problematic module needs to be disassembled, significantly improving the maintainability, scalability, and application flexibility of the structure.

[0038] Meanwhile, the modular beam structure has reserved space and channels for the installation of electronic components. Figure 2The electronic component integration cavity 3 shown is the reserved space in the design. The volume, internal shape, and wiring layout of this cavity have all been optimized to accommodate the installation and wiring requirements of electronic components such as the grounding calibration actuator. After the grounding calibration actuator is integrated into the electronic component integration cavity 3, it can directly perform dynamic calibration and optimization of the electromagnetic shielding performance of the Ek+ combined front beam structure. Furthermore, Figure 2 The segmentation marking line 2 clearly defines the physical boundaries of each modular beam, providing a reliable reference for the precise positioning of electronic components such as grounding calibration actuators during assembly, ensuring that each electronic component can accurately correspond to the preset functional area.

[0039] In the optional embodiment, the micro electromagnetic field sensor is a micro Hall effect sensor or a triaxial magnetic field sensor based on MEMS technology, and the electromagnetic interference monitoring array is deployed at the corner of the front baffle, the gap between the front beam and the frame, and the connection point of the hard disk backplane. The processing of the electromagnetic leakage signal intensity by the front beam control unit includes: periodically reading the magnetic field intensity data at the location of each micro electromagnetic field sensor, performing digital filtering on the magnetic field intensity data, comparing the filtered magnetic field intensity with a preset magnetic field threshold, and determining that there is an electromagnetic leakage anomaly at the corresponding location if the filtered magnetic field intensity exceeds the preset magnetic field threshold.

[0040] In this embodiment, when a miniature electromagnetic field sensor is used, its specific type can be a miniature Hall effect sensor or a triaxial magnetic field sensor based on MEMS technology. These sensors are small in size, have low power consumption, and high magnetic field sensing sensitivity, thus enabling them to accurately capture abnormally enhanced magnetic field signals at electromagnetic leakage points. The electromagnetic interference monitoring array is strategically deployed at key locations such as the corners of the front baffle, the gaps between the front beam and the frame, and the connection points of the hard drive backplane. Figure 2 As shown, the electronic component integration cavity 3 inside the modular beam body 4 provides integration space for sensors. By embedding sensors at the joints of the beam splicing and connection structures 5, these sensitive points of electromagnetic leakage can be directly monitored.

[0041] The front beam control unit is fixed to the front beam via its housing structure 6 and periodically reads the magnetic field strength data from each sensor at a preset frequency. Since the raw data may contain noise, the control unit first performs digital filtering to extract the valid signal. The processed data is then compared with a preset magnetic field threshold, which can be primarily determined based on electromagnetic compatibility safety standards and can be used for auxiliary verification or fine-tuning during system initialization by referring to the acquired benchmark value.

[0042] To ensure system reliability and stability, the control logic in this embodiment incorporates the following mechanism: when the filtered magnetic field strength at a certain location continuously exceeds a preset threshold for a set duration, it is confirmed as a persistent leak, and the front beam control unit triggers a grounding calibration mechanism to physically adjust that location. After the calibration is performed, the system waits for a preset stabilization period before re-collecting the magnetic field strength data at that location for effect evaluation, thus forming a stable and interference-resistant closed-loop control to avoid misjudgments and oscillations caused by transient interference or system inertia.

[0043] In this embodiment, through the segmented design of the modular beam body 4, the space guarantee of the electronic component integrated cavity 3, the interface optimization of the beam splicing connection structure 5, and the reliable fixing of the connecting fasteners 1, the entire system can achieve comprehensive coverage and intelligent monitoring of key leakage points.

[0044] In an optional embodiment, the contact resistance sensor embeds an elastic conductive material at the joint to be monitored in the Ek+ combined front beam structure. The elastic conductive material is a conductive pad or a conductive spring. The contact resistance sensor is connected to the elastic conductive material through a test point to measure the resistance value. The processing of the conductive continuity data by the front beam control unit includes: continuously monitoring the resistance value, comparing the resistance value with a preset resistance threshold, and if the resistance value exceeds the preset resistance threshold, determining that the conductive continuity at the corresponding location has failed and there is a potential risk of electromagnetic leakage.

[0045] In this embodiment, the contact resistance sensor is used to monitor the conductive continuity of the Ek+ combined front beam structure. An elastic conductive material, such as a conductive gasket or conductive spring, is pre-embedded at the joint to be monitored in the front beam structure. This type of elastic conductive material possesses both good conductivity and elastic deformation capability, allowing it to tightly fill the gaps in the beam splicing connection structure of the Ek+ combined front beam. Since the Ek+ combined front beam adopts a modular construction, the joint to be monitored corresponds to the splicing part between multiple modular beams. The elastic conductive material can remain in contact with the beam's minute deformation at this location, thereby constructing a stable resistance measurement circuit for the contact resistance sensor.

[0046] The contact resistance sensor is connected to a measurement circuit formed by a pre-embedded elastic conductive material through test points. These test points are located on the surface or internal conductive path of the modular beam near the elastic conductive material, thereby accurately acquiring contact resistance data characterizing the conductivity of the joints. Based on the modular design of the Ek+ combined front beam, the contact resistance sensor can be precisely positioned at the monitoring points of each module joint, thus achieving synchronous monitoring of multiple joints.

[0047] Meanwhile, in this embodiment, the front beam control unit's processing flow for conductive continuity data includes: its internal data acquisition module continuously reads the resistance values ​​of each contact resistance sensor at a preset cycle, for example, once every 50 milliseconds. Subsequently, the analysis module compares the real-time acquired resistance values ​​with a preset resistance threshold. This preset resistance threshold is determined experimentally or through simulation based on the resistance characteristics of the Ek+ combined front beam under normal conductive continuity conditions, and accurately reflects the normal range of conductivity at the joints. If the resistance value at a certain joint exceeds the preset resistance threshold, the front beam control unit will determine that the conductive continuity at the corresponding location has failed. Considering that conductive continuity is crucial for ensuring electromagnetic shielding effectiveness, this failure state can be identified as a potential electromagnetic leakage risk at that location.

[0048] In an optional embodiment, the grounding calibration actuator may include a smart grounding pin and / or an adaptive grounding pad; The intelligent grounding pin includes a micro actuator and a retractable metal pin, wherein the micro actuator is a piezoelectric ceramic driver or a micro stepper motor; The adaptive grounding pad is made of shape memory alloy or electrostrictive material.

[0049] In this embodiment, the grounding calibration actuator can mainly include two types: intelligent grounding pins and adaptive grounding pads. Both types of actuators are used to physically adjust the grounding state at the front beam joint when an electromagnetic leakage anomaly is detected, so as to restore or enhance the conductivity continuity and thus effectively suppress electromagnetic leakage.

[0050] The following is combined with Figure 3 and Figure 4 This paper details the structure and working principle of the intelligent grounding pin device, which mainly consists of a micro actuator and a retractable metal pin. The micro actuator can be a piezoelectric ceramic driver or a micro stepper motor; both of these driving methods offer advantages such as high precision and fast response, making them suitable for precise displacement control within confined spaces. The retractable metal pin is typically made of a metal material with good electrical conductivity; one end is fixed to the front beam structure, while the other end can extend and retract under the drive of the micro actuator. Figure 3 This diagram illustrates the monitoring and control layout of the intelligent grounding pin. Figure 3 As can be seen, the control circuitry is integrated within the housing structure 6 of the front beam control unit, and is connected to the miniature actuator of the intelligent grounding pin via wiring. Simultaneously, miniature electromagnetic field sensors are positioned at key corners of the front beam to monitor electromagnetic leakage in that area in real time and transmit signals to the front beam control unit. When the electromagnetic interference monitoring array detects an abnormal electromagnetic leakage at a joint, the front beam control unit immediately sends a control signal to the miniature actuator.

[0051] Combination Figure 4 In the leakage state, a gap exists at the front beam joint, allowing electromagnetic signals to leak. Upon receiving a control signal, for the intelligent grounding pin using a piezoelectric ceramic actuator, the control unit applies a specific voltage to cause a slight deformation of the piezoelectric ceramic, thereby pushing the retractable metal pin out. For pins using a micro stepper motor, the pin extension and retraction are driven by precisely controlling the step angle. In the calibration state, the end of the retractable metal pin is in close contact with the chassis frame surface, increasing the contact pressure and restoring the conductivity continuity at the joint, effectively blocking the electromagnetic leakage path. Throughout the process, the front beam control unit continuously receives feedback signals from the micro electromagnetic field sensor, adjusting the actuator's drive parameters in real time to form a closed-loop control. Simultaneously, the adaptive grounding pad, as another grounding calibration actuator, can be made of materials with special properties, including shape memory alloys or electrostrictive materials. These materials undergo controllable changes in physical properties under external excitation. When using shape memory alloys, the pad can recover a preset shape under specific temperature conditions; when using electrostrictive materials, the pad expands in volume or changes shape after applying voltage or current.

[0052] In practical applications, the adaptive grounding pads in this embodiment can be pre-installed at critical joints of the front beam structure. When the front beam control unit detects an electromagnetic leakage anomaly, it applies a specific voltage or current signal to the adaptive grounding pads. For shape memory alloy pads, heating with current causes a phase change, generating a shape memory effect, and the pad expands in volume to form a tighter fit with the joint surface. For electrostrictive material pads, their molecular structure changes under the influence of an electric field, leading to an increase in pad thickness or a change in surface morphology, thereby enhancing the conductive connection with the contact surface.

[0053] The combined use of these two grounding calibration actuators in this embodiment allows the system to select the most suitable calibration method for different electromagnetic leakage conditions and structural characteristics. Specifically, the intelligent grounding pin is suitable for joint calibration requiring higher contact pressure, while the adaptive grounding pad is more suitable for applications with limited space or high surface flatness requirements.

[0054] In optional embodiments, the physical adjustment may include at least one of the following methods: The front beam control unit outputs a drive signal to the micro actuator to drive the retractable metal pin to extend and retract to change the contact pressure with the chassis frame. The front beam control unit applies a specific voltage or current to the adaptive grounding pad, changing the physical properties of the adaptive grounding pad to cause it to expand or change shape to fit tightly against the seam.

[0055] In this embodiment, the physical adjustment process can be achieved mainly through two typical methods, depending on the type of grounding calibration actuator used.

[0056] The first physical adjustment method targets the intelligent grounding pin structure. When the front beam control unit detects an electromagnetic leakage anomaly at a specific joint through the electromagnetic interference monitoring array, it immediately outputs a corresponding drive signal to the micro-actuator. This drive signal can be calculated based on the control algorithm, specifically manifested as a drive voltage or drive current of a certain magnitude. When the micro-actuator uses a piezoelectric ceramic actuator, the drive voltage output by the front beam control unit causes precise micro-deformation of the piezoelectric material. This deformation is converted into linear displacement of the retractable metal pin through a mechanical transmission mechanism. When the micro-actuator uses a micro-stepper motor, the drive pulse signal output by the front beam control unit controls the motor to rotate by a specific angle, and the rotational motion is converted into linear motion of the retractable metal pin through a lead screw and nut mechanism. Under the drive action, the retractable metal pin generates axial displacement, and the contact state between its end and the chassis frame changes accordingly. As the pin extension length increases, the contact pressure between it and the chassis frame gradually increases, improving the conductivity continuity at the joint and effectively suppressing the electromagnetic leakage path.

[0057] The second physical adjustment method targets the adaptive grounding pad structure. Specifically, when the front beam control unit detects an electromagnetic leakage anomaly, it applies a precisely calculated specific voltage or current signal to the adaptive grounding pad. When the adaptive grounding pad uses a shape memory alloy material, the current signal applied by the front beam control unit causes the pad temperature to rise, triggering the material's phase change behavior and resulting in controlled expansion of the pad's volume, thereby enhancing the tightness of contact with the joint surface. When the adaptive grounding pad uses an electrostrictive material, the voltage signal applied by the front beam control unit changes the molecular arrangement of the material, causing changes in the pad's physical properties, manifested as shape changes or increased thickness, allowing it to better conform to the joint surface. This change in physical properties results in a more reliable electrical connection between the pad and the metal contact surface, effectively restoring the electromagnetic shielding performance at the joint.

[0058] Throughout the physical adjustment process, the front beam control unit continuously monitors the electromagnetic leakage signal strength or conductivity continuity data, and adjusts the parameters of the output drive signal based on real-time feedback until the monitored signal returns to a safe threshold range. This dynamic adjustment mechanism in this embodiment ensures continuous optimization of electromagnetic shielding performance, achieving complete closed-loop control from detection to calibration. Both physical adjustment methods can operate independently or be used in combination as needed for specific application scenarios.

[0059] In an optional embodiment, the feedback control may employ a PID control algorithm, and the execution process of the PID control algorithm may include the following steps: Step S1: The front beam control unit detects the electromagnetic leakage signal strength. Greater than the preset electromagnetic leakage safety threshold Or detect the joint resistance value Greater than the preset resistance safety threshold Calculation error ,in or .

[0060] Step S2: Calculate the error Substitute into the PID control formula to calculate the control quantity. The PID control formula is: In the formula, the symbol Represents the proportionality coefficient, symbol Represents the integral coefficient, symbol This represents the differential coefficient.

[0061] Control quantity in this step This can refer to things like the expansion and contraction of a smart grounding pin, or the driving voltage of an adaptive grounding pad, used to adjust the grounding status of the joint.

[0062] Step S3: Calculate the control quantity It is converted into a drive signal, which is a drive voltage or a drive current, and the drive signal is applied to the ground calibration actuator.

[0063] Due to control quantity These are abstract control commands calculated through control algorithms, such as the intelligent grounding pin needing to extend or retract by 2mm and the adaptive grounding pad needing to deform by 0.5mm. However, the hardware cannot directly recognize these abstract commands, so they need to be converted into drive voltage or drive current, which are physical signals that hardware actuators such as motors and piezoelectric elements can directly respond to. Drive signals can be divided into drive voltage and drive current, and the specific choice can be determined by the hardware type of the grounding calibration actuator.

[0064] Step S4: The grounding calibration actuator operates according to the drive signal. If the grounding calibration actuator is an intelligent grounding pin, the micro actuator drives the retractable metal pin to extend or retract, thereby increasing or decreasing the contact pressure between the retractable metal pin and the chassis frame. If the grounding calibration actuator is an adaptive grounding pad, the adaptive grounding pad changes its physical properties according to the drive signal to achieve a tight fit with the joint.

[0065] Step S5: The front beam control unit continuously monitors the electromagnetic leakage signal strength at the corresponding location. Or joint resistance value Repeat steps S1 to S4, adjusting the control quantity according to the new error value. until and Once the system reaches a stable state, feedback control ceases. This embodiment addresses the mixed arrangement scenario described above. The input to the PID control algorithm is the electromagnetic leakage signal strength. or resistance value The set value is a safety threshold. or .

[0066] In an optional embodiment, the method may further include an initialization step, comprising: When the system starts up, the front beam control unit initializes the electromagnetic interference monitoring array and the grounding calibration actuator, and collects reference values ​​from all sensors; The electromagnetic interference monitoring array periodically collects data at a preset frequency.

[0067] In this embodiment, when the system starts up, the front beam control unit performs an initialization operation. This operation is carried out on the electromagnetic interference monitoring array and the grounding calibration actuator to ensure that the two switch from the initial state to the normal working ready state. At the same time, the front beam control unit collects reference values ​​from all the micro sensors arranged in the electromagnetic interference monitoring array at the joints and connections of the front beam structure. These micro sensors include micro electromagnetic field sensors or contact resistance sensors. The collected reference values ​​will serve as the basic reference standard for subsequent judgment of whether electromagnetic leakage is abnormal.

[0068] After initialization and baseline value acquisition, the electromagnetic interference monitoring array will periodically acquire data at a preset frequency, continuously capturing electromagnetic leakage signal strength or conductivity continuity data at key monitoring locations of the front beam structure. This provides continuous and stable data input for subsequent signal comparison analysis and electromagnetic leakage anomaly judgment by the front beam control unit, ensuring the orderly startup and continuous operation of the entire front beam control process based on electromagnetic shielding performance monitoring. Upon system startup, the front beam control unit will initialize the electromagnetic interference monitoring array and grounding calibration actuator to ensure these components are in normal working condition. Simultaneously, it will acquire baseline values ​​for all miniature sensors located at the joints and connections of the front beam structure within the electromagnetic interference monitoring array. These miniature sensors can be miniature electromagnetic field sensors or contact resistance sensors; the acquired baseline values ​​will serve as a reference for subsequent signal analysis and anomaly judgment.

[0069] After initialization and baseline value acquisition, the electromagnetic interference monitoring array will carry out periodic data acquisition at a preset frequency, continuously acquiring electromagnetic leakage signal strength or conductivity continuity data at key monitoring points of the front beam structure. This provides continuous and stable data support for the front beam control unit to compare signals with preset thresholds and determine the electromagnetic leakage status in real time.

[0070] In an optional embodiment, when an electromagnetic leakage anomaly is detected, the front beam control unit can generate an alarm event and record the event occurrence time, the sensor ID corresponding to the leakage path, and the abnormal value. If the signal continues to exceed the preset threshold, the front beam control unit generates a high-level alarm and sends it to the chassis management controller; if the signal recovers to below the preset threshold, a calibration success event is recorded. The method also includes a logging step, which includes storing alarm events, high-level alarms, calibration success events and related data in local storage, and reporting them to an external central management system through the chassis management controller.

[0071] In this embodiment, "constantly exceeding" can refer to a signal consistently exceeding a threshold for a preset duration, such as 10 seconds or 30 seconds, thus eliminating transient fluctuations, such as brief electromagnetic shocks during equipment startup, and confirming a persistent fault, such as a detached conductive pad or a stuck intelligent grounding pin. The preset duration can be set according to the actual operating conditions of the equipment. Based on this, if the signal continuously exceeds the preset threshold, the front beam control unit must generate a high-level alarm and send it to the chassis management controller. This high-level alarm can indicate that the fault has affected the stability of electromagnetic shielding performance, requiring emergency intervention or escalation to a higher-level control unit. Upon receiving the high-level alarm, the chassis management controller can perform more complex operations, such as sending notifications to maintenance personnel, through pop-ups in the equipment management interface, SMS messages, or linking with other systems, such as temporarily reducing the operating power of high-frequency circuits within the chassis to reduce the intensity of electromagnetic radiation sources and prevent interference propagation.

[0072] In the technical solution of this application, the grounding calibration feedback mechanism constitutes a closed-loop control system, and the control loop of the system includes the electromagnetic interference monitoring array, the front beam control unit and the grounding calibration actuator; The front beam control unit continuously receives signals from the electromagnetic interference monitoring array and calculates and outputs corresponding control quantities to the grounding calibration actuator in real time based on the deviation of the signal from the preset threshold. The actuator then dynamically adjusts the grounding status at the front beam joint.

[0073] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A front beam control method based on electromagnetic shielding performance monitoring, characterized in that, include: An electromagnetic interference monitoring array is deployed in the Ek+ combined front beam structure. The electromagnetic interference monitoring array consists of multiple micro sensors, including micro electromagnetic field sensors and contact resistance sensors, and is arranged at the joints and connections of the front beam structure. The electromagnetic interference monitoring array signals are collected in real time by the front beam control unit. The signals consist of the electromagnetic leakage signal intensity collected by the miniature electromagnetic field sensor and / or the conductivity continuity data collected by the contact resistance sensor. The front beam control unit compares the signal with a preset threshold to determine whether there is an electromagnetic leakage anomaly. When an electromagnetic leakage anomaly is detected, the grounding calibration feedback mechanism is triggered, and the grounding status at the front beam joint is physically adjusted through the grounding calibration actuator. The front beam control unit continuously monitors the signal and adjusts the ground calibration actuator through feedback control until the signal recovers to below the preset threshold.

2. The front beam control method based on electromagnetic shielding performance monitoring according to claim 1, characterized in that, The Ek+ combined front beam structure is assembled from multiple modular beams that can be assembled and disassembled, and the connectors are clips or screws. The interior of the modular beams is reserved with space and channels for laying electronic components, and the grounding calibration actuator is integrated into the Ek+ combined front beam structure.

3. The front beam control method based on electromagnetic shielding performance monitoring according to claim 1, characterized in that, The miniature electromagnetic field sensor is a miniature Hall effect sensor or a triaxial magnetic field sensor based on MEMS technology. The electromagnetic interference monitoring array is deployed at the corner of the front baffle, the gap between the front beam and the frame, and the connection point of the hard disk backplane. The processing of the electromagnetic leakage signal intensity by the front beam control unit includes: periodically reading the magnetic field intensity data at the location of each micro electromagnetic field sensor, performing digital filtering on the magnetic field intensity data, comparing the filtered magnetic field intensity with a preset magnetic field threshold, and determining that there is an electromagnetic leakage anomaly at the corresponding location if the filtered magnetic field intensity exceeds the preset magnetic field threshold.

4. The front beam control method based on electromagnetic shielding performance monitoring according to claim 3, characterized in that, The contact resistance sensor is pre-embedded with elastic conductive material at the joint to be monitored in the Ek+ combined front beam structure. The elastic conductive material is a conductive pad or a conductive spring sheet. The contact resistance sensor is connected to the elastic conductive material through a test point to measure the resistance value. The front beam control unit processes the conductive continuity data by continuously monitoring the resistance value and comparing it with a preset resistance threshold. If the resistance value exceeds the preset resistance threshold, it determines that the conductive continuity at the corresponding location has failed, indicating a potential risk of electromagnetic leakage.

5. The front beam control method based on electromagnetic shielding performance monitoring according to claim 1, characterized in that, The grounding calibration actuator includes a smart grounding pin and / or an adaptive grounding pad; The intelligent grounding pin includes a micro actuator and a retractable metal pin, wherein the micro actuator is a piezoelectric ceramic driver or a micro stepper motor; The adaptive grounding pad is made of shape memory alloy or electrostrictive material.

6. The front beam control method based on electromagnetic shielding performance monitoring according to claim 5, characterized in that, The physical adjustment includes at least one of the following methods: The front beam control unit outputs a drive signal to the micro actuator to drive the retractable metal pin to extend and retract to change the contact pressure with the chassis frame. The front beam control unit applies a specific voltage or current to the adaptive grounding pad, changing the physical properties of the adaptive grounding pad to cause it to expand or change shape to fit tightly against the seam.

7. The front beam control method based on electromagnetic shielding performance monitoring according to claim 1, characterized in that, The feedback control employs a PID control algorithm, and the execution process of the PID control algorithm includes the following steps: Step S1: The front beam control unit detects the electromagnetic leakage signal strength. Greater than the preset electromagnetic leakage safety threshold Or detect the joint resistance value Greater than the preset resistance safety threshold Calculation error ,in or ; Step S2: Calculate the error Substitute into the PID control formula to calculate the control quantity. The PID control formula is: In the formula, the symbol Represents the proportionality coefficient, symbol Represents the integral coefficient, symbol Represents the differential coefficient; Step S3: Calculate the control quantity The signal is converted into a drive signal, which is a drive voltage or a drive current, and the drive signal is applied to the ground calibration actuator. Step S4: The grounding calibration actuator operates according to the drive signal. If the grounding calibration actuator is an intelligent grounding pin, the micro actuator drives the retractable metal pin to extend or retract, thereby increasing or decreasing the contact pressure between the retractable metal pin and the chassis frame. If the grounding calibration actuator is an adaptive grounding pad, the adaptive grounding pad changes its physical properties according to the drive signal to achieve a tight fit with the joint. Step S5: The front beam control unit continuously monitors the electromagnetic leakage signal strength at the corresponding location. Or joint resistance value Repeat steps S1 to S4, adjusting the control quantity according to the new error value. until and Once the system reaches a stable state, feedback control ceases. The input to the PID control algorithm is the electromagnetic leakage signal strength. or resistance value The set value is a safety threshold. or .

8. The front beam control method based on electromagnetic shielding performance monitoring according to claim 1, characterized in that, The method further includes an initialization step, comprising: When the system starts up, the front beam control unit initializes the electromagnetic interference monitoring array and the grounding calibration actuator, and collects reference values ​​from all sensors; The electromagnetic interference monitoring array periodically collects data at a preset frequency.

9. The front beam control method based on electromagnetic shielding performance monitoring according to claim 1, characterized in that, When an electromagnetic leakage anomaly is detected, the front beam control unit generates an alarm event and records the event occurrence time, the sensor ID corresponding to the leakage path, and the abnormal value. If the signal continues to exceed the preset threshold, the front beam control unit generates a high-level alarm and sends it to the chassis management controller. If the signal recovers to below the preset threshold, a calibration success event is recorded. The method also includes a logging step, which includes storing alarm events, high-level alarms, calibration success events and related data in local storage, and reporting them to an external central management system through the chassis management controller.

10. The front beam control method based on electromagnetic shielding performance monitoring according to claim 1, characterized in that, The grounding calibration feedback mechanism constitutes a closed-loop control system, the control loop of which includes the electromagnetic interference monitoring array, the front beam control unit and the grounding calibration actuator. The front beam control unit continuously receives signals from the electromagnetic interference monitoring array and calculates and outputs corresponding control quantities to the grounding calibration actuator in real time based on the deviation of the signal from the preset threshold. The actuator then dynamically adjusts the grounding status at the front beam joint.

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