Test verification method of omnidirectional inertia switch and omnidirectional inertia switch

Abstract

The invention discloses a test verification method of an omnidirectional inertia switch and the omnidirectional inertia switch. The method comprises the following steps: based on a three-dimensional structure model of the omnidirectional inertia switch, setting material parameters and boundary conditions, carrying out modal simulation analysis, and obtaining inherent frequencies and vibration modes of multiple orders of the omnidirectional inertia switch; determining a frequency band causing structural damage or false triggering by identifying a resonance frequency point with sudden amplitude increase and a response amplitude peak value in harmonic response in each direction and combining a modal simulation analysis result; and carrying out dynamic test on the omnidirectional inertia switch based on the frequency band causing structural damage or false triggering. The technical problem that the reliability and the stability of the omnidirectional inertia switch under various working conditions are poor is solved.

Description

Technical Field

[0001] The present invention relates to the field of omnidirectional inertia switches, and in particular to a testing and verification method for an omnidirectional inertia switch and the omnidirectional inertia switch. Background Art

[0002] As a key sensor device that can trigger actions under multi-directional inertial loads, the dynamic response characteristics and structural reliability of omnidirectional inertial switches directly determine their functional stability under complex working conditions (such as multi-dimensional vibration, impact, random loads, etc.). Traditional testing methods mainly rely on physical testing methods, such as applying unidirectional or simple composite vibration excitation through a vibration table, combined with an impact test bench to simulate transient loads, to verify the triggering threshold and structural tolerance of the switch in a specific direction. However, such methods have significant limitations: First, physical testing is limited by the load direction coverage capability of the equipment, and it is difficult to fully simulate the spatial random loads in the real environment, resulting in incomplete identification of potential dangerous frequency bands; second, the stress concentration points and resonant modes of the switch structure are difficult to monitor in real time during the test, which can easily cause lags in the test results and cannot effectively guide early design optimization; third, repeated physical testing cycles are long and costly, and destructive testing may lead to sample loss, affecting R&D efficiency.

[0003] In the existing technology, although some analyses have attempted to introduce finite element simulation to predict the dynamic characteristics of switches, they are mostly limited to single-direction modal analysis or static mechanical performance simulation, and fail to systematically associate the modal simulation results with the multi-directional harmonic response characteristics, resulting in an unclear mapping relationship between the resonant frequency band and the structural failure mode. In addition, traditional simulation models often ignore key boundary conditions such as material nonlinearity and contact friction, further reducing the accuracy of dangerous frequency band determination. The above defects make existing omnidirectional inertial switches prone to structural fatigue damage or false triggering due to unidentified resonance under complex working conditions, seriously restricting their application in high-reliability scenarios (such as aerospace and vehicle-mounted safety systems).

[0004] Therefore, there is an urgent need to develop an omnidirectional inertial switch verification method that can integrate multi-physics field simulation and directional dynamic testing. By accurately identifying multi-order modal response characteristics and their coupling effects with harmonic excitation, the weak frequency bands of the structure can be quickly located, and a closed-loop feedback mechanism of simulation and experimental data can be established, thereby systematically improving the robustness and environmental adaptability of the switch.

[0005] To address the above-mentioned problems, no effective solutions have been proposed so far. Summary of the Invention

[0006] The embodiments of the present invention provide a test and verification method for an omnidirectional inertial switch and an omnidirectional inertial switch, so as to at least solve the technical problem of poor reliability and stability of the omnidirectional inertial switch under various working conditions.

[0007] According to one aspect of an embodiment of the present invention, a method for testing and verifying an omnidirectional inertial switch is provided, comprising: setting material parameters and boundary conditions based on a three-dimensional structural model of the omnidirectional inertial switch, performing modal simulation analysis, and obtaining multiple orders of natural frequencies and vibration modes of the omnidirectional inertial switch; identifying resonant frequency points and response amplitude peaks with sudden increases in amplitude in harmonic responses in all directions, and determining, in combination with the results of the modal simulation analysis, frequency bands that cause structural damage or false triggering; and performing dynamic testing on the omnidirectional inertial switch based on the frequency bands that cause structural damage or false triggering.

[0008] According to another aspect of an embodiment of the present invention, an omnidirectional inertial switch is provided, which is obtained by testing using the above method.

[0009] In an embodiment of the present invention, based on a three-dimensional structural model of an omnidirectional inertial switch, material parameters and boundary conditions are set, and modal simulation analysis is performed to obtain the natural frequencies and vibration modes of the omnidirectional inertial switch at multiple orders. The results of the modal simulation analysis are combined with the identification of resonant frequency points and peak response amplitudes in the harmonic responses in each direction to determine the frequency bands that cause structural damage or false triggering. Based on these frequency bands that cause structural damage or false triggering, the omnidirectional inertial switch is dynamically tested. This method solves the technical problem of poor reliability and stability of the omnidirectional inertial switch under various operating conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0011] Figure 1 is a flow chart of a test and verification method for an omnidirectional inertial switch according to an embodiment of the present invention;

[0012] Figure 2 is a flow chart of another method for testing and verifying an omnidirectional inertial switch according to an embodiment of the present invention;

[0013] Figure 3 is a finite element model of a new inertia switch prototype according to an embodiment of the present invention, wherein (a) is a finite element simulation model, and (b) is a model mesh division diagram;

[0014] Figure 4 is a diagram of the x-axis harmonic response result according to an embodiment of the present invention;

[0015] Figure 5 is a diagram of the y-axis harmonic response result according to an embodiment of the present invention;

[0016] Figure 6is a diagram of z-axis harmonic response results according to an embodiment of the present invention;

[0017] Figure 7 1 and 2 are first-order and second-order mode shape diagrams according to an embodiment of the present invention, wherein (a) is the first-order mode and (b) is the second-order mode;

[0018] Figure 8 3 and 4 are the vibration mode diagrams of the third and fourth order modes according to an embodiment of the present invention, wherein (a) is the third order mode and (b) is the fourth order mode;

[0019] Figure 9 5 and 6 are mode shape diagrams of the fifth and sixth orders according to an embodiment of the present invention, wherein (a) is the fifth order mode and (b) is the sixth order mode;

[0020] Figure 10 4 is a batch test diagram of an inertia switch according to an embodiment of the present invention. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0022] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0023] According to an embodiment of the present invention, a method embodiment of a test and verification method for an omnidirectional inertial switch is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0024] Figure 1This is a test and verification method for an omnidirectional inertial switch according to an embodiment of the present invention, such as Figure 1 As shown, the method includes the following steps:

[0025] Step S102: Based on the three-dimensional structural model of the omnidirectional inertial switch, material parameters and boundary conditions are set, and modal simulation analysis is performed to obtain multiple orders of natural frequencies and vibration modes of the omnidirectional inertial switch;

[0026] Material parameters and boundary conditions are set based on a three-dimensional structural model of the omnidirectional inertial switch. The three-dimensional structural model includes a base, a support beam, a limit column, and a sensitive mass block. The base and the limit column are set as fixed boundaries, and no displacement constraint is imposed on the sensitive mass block.

[0027] The modal superposition method is used, based on the free vibration equation with neglected damping, to analytically obtain the first six modal frequencies and vibration mode distributions, which correspond to axial reciprocating motion, X and Z axis rocking motion, left and right swinging motion, and in-situ rotation motion, and the key frequency segment causing false triggering is determined according to the modal response characteristics.

[0028] Step S104, by identifying the resonance frequency points and response amplitude peaks of the harmonic responses in each direction where the amplitude suddenly increases, and combining the results of the modal simulation analysis, determining the frequency band that causes structural damage or false triggering;

[0029] Based on the modal simulation analysis, multi-axial acceleration loads are applied to perform harmonic response simulation analysis to obtain amplitude-frequency response data in each direction. Based on the amplitude-frequency response data, the resonant frequency points and response amplitude peaks in each direction are identified. Combined with the results of the modal simulation analysis, the stability of the omnidirectional inertial switch in the operating frequency band is determined.

[0030] Step S106 : performing a dynamic test on the omnidirectional inertial switch based on the frequency band causing structural damage or false triggering.

[0031] Under the premise of eliminating the frequency bands that cause structural damage or false triggering, multiple omnidirectional inertial switches are dynamically tested in batches according to the acceleration step-size control strategy to determine whether each omnidirectional inertial switch meets performance requirements. The acceleration step-size control strategy includes initially applying acceleration with a step size greater than the step-size threshold. When approaching the trigger critical value, the step size is adjusted to a value less than the step-size threshold to accurately identify the switch trigger threshold. Specifically, the response status of each omnidirectional inertial switch is recorded, and the response status data is compared and analyzed to extract the performance indicators of each omnidirectional inertial switch. The performance indicators include trigger threshold acceleration, contact time, and response time. Based on the comparison of these performance indicators with preset standards, it is determined whether each omnidirectional inertial switch meets the performance requirements.

[0032] Figure 2 This is another test and verification method for an omnidirectional inertial switch according to an embodiment of the present invention. The method includes two parts: simulation analysis and test verification. In the simulation analysis part of the omnidirectional inertial switch prototype development, three steps are included: simulation model establishment, modal response analysis, and harmonic response analysis. These steps are intended to perform detailed performance analysis and optimization of the prototype through simulation. In the batch test and verification method part of the omnidirectional inertial switch, three steps are included: overload resistance test, trigger threshold test, and temperature cycle test. These steps are used to conduct actual performance tests on mass-produced omnidirectional inertial switches to ensure their reliability and stability under various working conditions.

[0033] like Figure 2 As shown, the method includes:

[0034] Step S202: omnidirectional inertial switch simulation analysis.

[0035] Before the prototype of the omnidirectional inertial switch is developed, simulation verification will be carried out. By simulating the theoretical model of the established omnidirectional inertial switch, the response characteristics of the structure at different frequencies and the internal stress conditions under no acceleration overload can be analyzed, thereby ensuring the dynamic characteristics of the inertial device and its stability under extreme conditions.

[0036] For overload analysis, it is necessary to simulate the response of the switch under load conditions exceeding normal working conditions. This includes applying static or transient overload forces to evaluate the maximum load-bearing capacity and deformation of the structure. Through detailed analysis of the stress distribution under different load conditions, the areas most prone to failure can be determined, and the design can be optimized accordingly, such as increasing the local thickness or using higher strength materials. In addition, combined with safety factor considerations, it is ensured that the omnidirectional switch can maintain functional integrity and safety even in the event of an accidental overload. In summary, while modal analysis is used to ensure the dynamic performance of the equipment, overload analysis is used to enhance its adaptability to extreme conditions. The two work together to achieve a more robust and reliable omnidirectional switch design. Its finite element simulation model is as follows: Figure 3 shown.

[0037] In the modal analysis, a 3D model of the omnidirectional inertial switch was first constructed. Based on the actual material properties, the simulation model was set to a density of 8900 kg / m³, a Young's modulus of 200 GPa, and a Poisson's ratio of 0.3. The material settings are shown in the table. For boundary conditions, the base, support columns, and center limit column were all fixed and constrained. Finite element software was then used to calculate the structure's natural frequencies and corresponding mode shapes, a key step in identifying potential resonance issues in the design. Understanding these modal characteristics helps avoid resonance caused by coincidence of excitation frequencies with the device's natural frequencies in the operating environment, thereby reducing unnecessary vibration and noise and improving the stability and service life of the inertial switch. Based on this information, a harmonic response analysis was performed. Acceleration loads of 100 g were applied to the inertial switch in the x, y, and z axes, respectively. The amplitude-frequency response of the omnidirectional inertial switch was obtained in the 0-10,000 Hz frequency domain.

[0038] 1) Harmonic response simulation analysis.

[0039] This method can clearly define the frequency range in which an inertia switch can effectively operate within its design parameters and understand the switch's response characteristics under different vibration conditions. The change in amplitude-frequency response under different accelerations (g values) can be used to evaluate the inertia switch's sensitivity and its response consistency over a wide range. Extracting the resonant frequency of the inertia switch can help prevent false triggering or damage caused by resonance during device development.

[0040] like Figure 4 As shown in the figure, the harmonic response results on the x-axis show that within the range of 0Hz to approximately 5000Hz, the response amplitude of the inertia switch's sensitive structure is very small, almost close to zero, proving that the inertia switch's response in the low-frequency range is very weak, with almost no displacement. At 5600Hz, 6200Hz, and 7800Hz, the displacement response amplitude of the sensitive element increases sharply and reaches peak values. These peaks are the resonant frequencies of the inertia switch, and interference from these frequencies should be avoided in actual operation.

[0041] like Figure 5 As shown, the harmonic response along the axial (Y-axis) indicates that within the frequency range of 0 Hz to approximately 10,000 Hz, the inertia switch exhibits virtually no response in the low-frequency band (0 Hz-5,000 Hz), with its displacement amplitude approaching zero. This characteristic ensures excellent stability in low-frequency vibration environments, significantly reducing the possibility of false triggering. At approximately 5,600 Hz, the displacement response amplitude of the sensing element increases significantly and reaches a peak, marking the primary resonant frequency of the inertia switch. To ensure reliability and accuracy in practical applications, operation near this resonant frequency should be avoided as much as possible.

[0042] like Figure 6As shown in the figure, the harmonic response results in the radial direction (X-axis and Z-axis) show that the response patterns of the two are highly consistent. Given the symmetry of the structure, under the same test conditions, the response characteristics of the acceleration in the radial direction remain consistent. This phenomenon not only verifies the design symmetry principle, but also reflects the consistent triggering performance of the inertia switch in the radial direction. This means that whether the same conditions of excitation are applied in the X-axis or Z-axis direction, the inertia switch can provide similar and reliable response performance, which is particularly important for application scenarios requiring multi-directional detection.

[0043] According to the preliminary harmonic response results, under clear constraints, the preliminary design of the inertial structure demonstrated high stability with almost no response in the low-frequency band (0Hz-5000Hz), effectively avoiding false triggering in daily environments. In addition, the consistent harmonic response in the radial direction (X-axis and Z-axis) verified its structural symmetry and the consistency and reliability of multi-directional triggering. These advantages collectively prove that this design not only has excellent anti-interference capabilities and stable performance, but also demonstrates high feasibility and reliability in practical applications. In the modal simulation, the role of the center limit column is ignored, and the dynamic characteristics of the inertial switch in the automatic state are obtained. Its basic principle meets the requirements. In order to analyze the frequency characteristics and motion characteristics of each order mode of the core structure of the omnidirectional inertial switch without any constraints, the modal simulation in the finite element simulation method is used to solve the vibration mode and frequency of each order of the inertial switch.

[0044] 2) Modal simulation analysis.

[0045] Modal simulation can analyze the structural dynamic characteristics of the inertia switch. According to the basic theory of modal simulation, without limiting the displacement constraint, the dynamic control equation of the entire system can be expressed as:

[0046]

[0047] In the dynamic control equation of the core sensitive structure (mass block): [M] is the global mass matrix; [C] is the global damping matrix; [K] is the global stiffness matrix, {F} is the time-varying external force load function; {a} is the equivalent node displacement vector; is the equivalent nodal velocity vector; is the equivalent node acceleration vector. In this modal simulation, if damping is ignored, the entire system of the inertial switch sensitive structure is regarded as a multi-degree-of-freedom linear vibration, and its motion equation can be expressed as:

[0048]

[0049] Modal simulation can be understood as a free state in which the system is not subjected to any load or external force. Therefore, the external force load function can be set to 0. Substituting {F} = 0 into the formula, the simplified system motion equation is:

[0050]

[0051] Combined with the simplified system motion equation in the free state, the modal superposition method is used to analyze and solve the first six modes, and the first six modal vibration shapes of the omnidirectional inertial sensitive structure (moving electrode) are obtained as follows: Figure 7 shown.

[0052] When the omnidirectional inertial switch experiences modal deformation at 1651.4Hz, the entire sensitive structure experiences significant axial motion, which affects the axial triggering of the inertial switch. This modal's natural frequency can be altered by adjusting the design of the support beam spring, or by optimizing the structure to limit axial displacement. The second-order mode shows that the inertial switch produces modal vibration at 2785.7Hz, with a rocking reciprocating motion along the x-axis, which can cause false triggering of the four key electrodes along the x-axis.

[0053] like Figure 8 As shown, the movement directions of the third-order mode and the second-order mode are perpendicular to each other, and the corresponding natural frequency is 2794.1Hz. Its main movement mode is rocking reciprocating motion along the z-axis (radial direction), which will also cause false touches on the four key electrodes along the z-axis. For this type of rocking reciprocating motion mode in a certain direction, the structure of the limit column can be optimized to limit the displacement of the inertial switch, thereby preventing accidental triggering. The main movement modes of the fourth-order and fifth-order modes are left and right rocking modes in situ, with natural frequencies of 3732.3Hz and 3735.3Hz respectively. These two modes of movement do not cause contact with the eight electrodes in the radial direction, but if the amplitude is large, it may contact the fixed electrode sheet in the axial direction. For such cases, the gap between the sensitive structural mass block and the fixed electrode can be adjusted accordingly. The limit amplitude value generated by the modal vibration is less than the gap between the two, thereby achieving precise triggering.

[0054] like Figure 9 As shown in Figure 1, during the sixth-stage modal vibration, the core trigger structure of the omnidirectional inertial switch exhibits in-situ reciprocating spin motion. Without any directional constraints, no radial or axial displacement components are generated. Therefore, the modal vibration generated at a natural frequency of 4028 Hz does not materially affect the effective triggering of the inertial switch. Based on the modal simulation results, the natural frequencies and frequency modes corresponding to the first six modes of the omnidirectional inertial switch are summarized, as shown in Table 1.

[0055] Table 1 Correspondence between natural frequency and frequency mode

[0056]

[0057] Step S204: batch testing and verification.

[0058] Inertia switches, especially omnidirectional ones, can only be tested in one direction or for one group of devices at a time. This results in significant time wasted replacing switches and setting initial device values. To improve testing efficiency, a batch testing method was explored and the corresponding hardware and software were designed. By placing a batch of inertia switches into the equipment, each one is tested individually through software and hardware control. This significantly improves testing efficiency and enables rapid testing of inertia switches.

[0059] The purpose of inertia switch testing is to verify the switch's overload resistance, trigger threshold, and other indicators. This process often requires multiple repetitive tests for a single inertia switch, such as resetting the acceleration step size and initial value. Testing a batch of switches significantly increases the time required, significantly impacting the experimental process. Therefore, testing a batch of switches simultaneously can greatly simplify the testing and debugging process, saving significant time during component assembly and disassembly. Therefore, a test system is needed for batch testing of inertia switches. This system utilizes the switch's signal interface to monitor the measurement results on a computer or a signal receiving device, such as an oscilloscope, to determine whether the switch performance meets the specified specifications.

[0060] Because each switch receives the same instructions, batch testing can be performed with only one inertia switch operating while the others remain inoperative. The host computer sequentially obtains the measurement results of each switch and determines whether the performance meets the requirements. Once the entire batch is tested, the entire group of inertia switches is tested.

[0061] During testing, the number of prototypes is set to 64, meaning that 64 inertia switches can be tested in a single test. Vibration is applied in each of the X, Y, and Z directions for 5 minutes. During the vibration test, the product's performance is tested, ensuring that it meets the requirements of the technical documentation. After the test, a visual inspection is performed. The vibration control point should be located on the fixture or vibration table, near the area with the greatest stiffness. For large equipment, multi-point averaging control can be used.

[0062] Temperature Cycle Test: Each temperature cycle is tested once. Power is turned on before the low-temperature hold ends. Power is turned on to ensure that functional performance tests are completed in a low-temperature environment. After the low-temperature test is completed, the product remains powered on until the high-temperature hold ends. Carefully observe the product's operating status during the heating and high-temperature hold processes.

[0063] During the test, the device test pictures are as follows: Figure 10 shown.

[0064] In the dynamic test of inertia switches, the indicators that need to be measured are often different depending on the switch material and structure, but the common test indicators include the switch's overload resistance, trigger threshold, contact time and response time.

[0065] An inertia switch's overload resistance refers to its ability to operate normally or withstand loads exceeding its rated value or mechanical shock. This typically involves determining whether the switch can maintain functionality without damage when subjected to forces, pressures, or currents exceeding normal operating conditions for a short period of time. Specifically, overload resistance can include the following aspects: current carrying capacity, mechanical strength, thermal stability, and operational reliability.

[0066] When designing and using an inertia switch, it is crucial to understand its overload resistance to ensure safe and reliable operation in practical applications. Methods and devices for testing the overload resistance of switches include the Machete hammer, Hopkinson bar, air cannon, and drop hammer tester.

[0067] When the inertial switch is bistable and is used in a low-g environment, a standard acceleration for positive closure is set for the designed MEMS inertial switch. Therefore, during the initial acceleration test, an acceleration value less than this standard value is used as the starting point, and the step size is set to 1g. When the acceleration reaches the critical range that may trigger the inertial switch to close, the step size is adjusted to 0.5g until the inertial switch achieves the second-stage bistable transition and closes the switch, completing an acceleration excitation. An optical microscope is used to observe whether the inertial switch is closed, and the acceleration excitation applied at this time is recorded. This acceleration is the triggering threshold acceleration.

[0068] After completing the development and production of the MEMS inertial switch, the designed switch needs to be packaged and tested. When packaging the device, the main purpose of the package is to protect the switch device and prevent damage to the switch structure during subsequent testing and verification. In actual applications, inertial switches usually need to be packaged in ceramic or plastic. However, in order to achieve device miniaturization, a narrow-pitch LCC package is used. This surface-mount package has pins that bend inward at the bottom edge of the chip, tightly fitting the chip, greatly reducing the installation volume. However, since the LCC package is leadless, the leads of the two electrodes of the switch are retained for easy debugging.

[0069] After the device packaging is completed, the switch needs to be tested for performance indicators. Omnidirectional inertial switches are dynamic switches, so dynamic testing methods are used during testing. A common dynamic testing method is to conduct an impact test, usually using a data acquisition system and a drop hammer system to test the acceleration trigger threshold, contact time, response time, response angle, and overload resistance. Currently, experimental devices for testing the dynamic response characteristics of inertial switches include centrifuges, high-speed turntables, drop hammer tests, etc. These experimental devices apply accelerations of certain waveforms, pulse widths, and amplitudes to MEMS switch samples to obtain the performance indicators of the switch.

[0070] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A test and verification method for an omnidirectional inertial switch, characterized in that: include: Based on the 3D structural model of the omnidirectional inertial switch, material parameters and boundary conditions were set, and modal simulation analysis was performed to obtain the natural frequencies and vibration modes of multiple orders of the omnidirectional inertial switch. By identifying the resonant frequency points and response amplitude peaks of the harmonic responses in all directions where the amplitude suddenly increases, and combining the results of the modal simulation analysis, the frequency bands that cause structural damage or false triggering are determined; Based on the frequency band causing structural damage or false triggering, a dynamic test is performed on the omnidirectional inertial switch.

2. The method according to claim 1, characterized in that The three-dimensional structural model includes a base, a support beam, a limiting column and a sensitive mass block, and the base and the limiting column are set as fixed boundaries, and no displacement constraint is imposed on the sensitive mass block.

3. The method according to claim 2, characterized in that Modal simulation analysis is performed, including: using the modal superposition method, based on the free vibration equation ignoring damping, to analytically obtain the first six modal frequencies and vibration mode distributions, which correspond to axial reciprocating motion, X and Z axis swing motion, left and right swing, and in-situ rotation motion, and determine the key frequency segment that causes false triggering based on the modal response characteristics.

4. The method according to claim 2, characterized in that By identifying the resonant frequency points and response amplitude peaks where the amplitude suddenly increases in the harmonic responses in all directions, combined with the results of the modal simulation analysis, the frequency bands that cause structural damage or false triggering are determined, including: On the basis of the modal simulation analysis, multi-axial acceleration loads are applied to perform harmonic response simulation analysis to obtain amplitude-frequency response data in each direction; Based on the amplitude-frequency response data, the resonant frequency points and response amplitude peaks in each direction are identified, and combined with the results of the modal simulation analysis, the stability of the omnidirectional inertial switch in the operating frequency band is determined.

5. The method according to claim 2, characterized in that Based on the frequency band causing structural damage or false triggering, a dynamic test is performed on the omnidirectional inertial switch, including: On the premise of eliminating the frequency bands that cause structural damage or false triggering, multiple omnidirectional inertial switches are dynamically tested in batches according to the acceleration step control strategy to determine whether each of the omnidirectional inertial switches meets the performance requirements.

6. The method according to claim 5, characterized in that Dynamic testing is performed on a plurality of omnidirectional inertial switches in batches to determine whether each of the omnidirectional inertial switches meets performance requirements, including: Recording the response status of each of the omnidirectional inertial switches, and performing comparative analysis on the response status data to extract performance indicators of each omnidirectional inertial switch; Based on the comparison between the performance indicators and the preset standards, it is determined whether each of the omnidirectional inertial switches meets the performance requirements.

7. The method according to claim 5, characterized in that The acceleration step length control strategy includes initially applying acceleration with a step length greater than a step length threshold, and when approaching a trigger critical value, adjusting the step length to a value less than the step length threshold to finely identify the switch trigger threshold.

8. The method according to claim 6, characterized in that in, The performance indicator includes at least one of the following: trigger threshold acceleration, contact time, response time, response angle, and overload resistance.

9. The method according to claim 1, characterized in that After the batch test is completed, the method further includes: confirming the electrode lead status of the omnidirectional inertial switch packaged in the LCC structure to ensure the package integrity and debugging feasibility.

10. An omnidirectional inertial switch, characterized in that: The method according to any one of claims 1 to 9 is used for testing.

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